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-rw-r--r--layout/generic/nsFrame.cpp11380
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diff --git a/layout/generic/nsFrame.cpp b/layout/generic/nsFrame.cpp
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index 000000000..69791d5c5
--- /dev/null
+++ b/layout/generic/nsFrame.cpp
@@ -0,0 +1,11380 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:cindent:ts=2:et:sw=2:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* base class of all rendering objects */
+
+#include "nsFrame.h"
+
+#include <stdarg.h>
+#include <algorithm>
+
+#include "gfx2DGlue.h"
+#include "gfxUtils.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DebugOnly.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/PathHelpers.h"
+#include "mozilla/Sprintf.h"
+
+#include "nsCOMPtr.h"
+#include "nsFrameList.h"
+#include "nsPlaceholderFrame.h"
+#include "nsIContent.h"
+#include "nsIContentInlines.h"
+#include "nsContentUtils.h"
+#include "nsCSSPseudoElements.h"
+#include "nsIAtom.h"
+#include "nsString.h"
+#include "nsReadableUtils.h"
+#include "nsStyleContext.h"
+#include "nsTableWrapperFrame.h"
+#include "nsView.h"
+#include "nsViewManager.h"
+#include "nsIScrollableFrame.h"
+#include "nsPresContext.h"
+#include "nsStyleConsts.h"
+#include "nsIPresShell.h"
+#include "mozilla/Logging.h"
+#include "mozilla/Sprintf.h"
+#include "nsFrameManager.h"
+#include "nsLayoutUtils.h"
+#include "LayoutLogging.h"
+#include "mozilla/RestyleManager.h"
+#include "mozilla/RestyleManagerHandle.h"
+#include "mozilla/RestyleManagerHandleInlines.h"
+
+#include "nsIDOMNode.h"
+#include "nsISelection.h"
+#include "nsISelectionPrivate.h"
+#include "nsFrameSelection.h"
+#include "nsGkAtoms.h"
+#include "nsHtml5Atoms.h"
+#include "nsCSSAnonBoxes.h"
+
+#include "nsFrameTraversal.h"
+#include "nsRange.h"
+#include "nsITextControlFrame.h"
+#include "nsNameSpaceManager.h"
+#include "nsIPercentBSizeObserver.h"
+#include "nsStyleStructInlines.h"
+#include "FrameLayerBuilder.h"
+#include "ImageLayers.h"
+
+#include "nsBidiPresUtils.h"
+#include "RubyUtils.h"
+#include "nsAnimationManager.h"
+
+// For triple-click pref
+#include "imgIContainer.h"
+#include "imgIRequest.h"
+#include "nsError.h"
+#include "nsContainerFrame.h"
+#include "nsBoxLayoutState.h"
+#include "nsBlockFrame.h"
+#include "nsDisplayList.h"
+#include "nsSVGIntegrationUtils.h"
+#include "nsSVGEffects.h"
+#include "nsChangeHint.h"
+#include "nsDeckFrame.h"
+#include "nsSubDocumentFrame.h"
+#include "SVGTextFrame.h"
+
+#include "gfxContext.h"
+#include "nsRenderingContext.h"
+#include "nsAbsoluteContainingBlock.h"
+#include "DisplayItemScrollClip.h"
+#include "StickyScrollContainer.h"
+#include "nsFontInflationData.h"
+#include "nsRegion.h"
+#include "nsIFrameInlines.h"
+
+#include "mozilla/AsyncEventDispatcher.h"
+#include "mozilla/EffectCompositor.h"
+#include "mozilla/EffectSet.h"
+#include "mozilla/EventListenerManager.h"
+#include "mozilla/EventStateManager.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/MouseEvents.h"
+#include "mozilla/css/ImageLoader.h"
+#include "mozilla/gfx/Tools.h"
+#include "nsPrintfCString.h"
+#include "ActiveLayerTracker.h"
+
+#include "nsITheme.h"
+#include "nsThemeConstants.h"
+
+using namespace mozilla;
+using namespace mozilla::css;
+using namespace mozilla::dom;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+using namespace mozilla::layout;
+typedef nsAbsoluteContainingBlock::AbsPosReflowFlags AbsPosReflowFlags;
+
+// Struct containing cached metrics for box-wrapped frames.
+struct nsBoxLayoutMetrics
+{
+ nsSize mPrefSize;
+ nsSize mMinSize;
+ nsSize mMaxSize;
+
+ nsSize mBlockMinSize;
+ nsSize mBlockPrefSize;
+ nscoord mBlockAscent;
+
+ nscoord mFlex;
+ nscoord mAscent;
+
+ nsSize mLastSize;
+};
+
+struct nsContentAndOffset
+{
+ nsIContent* mContent;
+ int32_t mOffset;
+};
+
+// Some Misc #defines
+#define SELECTION_DEBUG 0
+#define FORCE_SELECTION_UPDATE 1
+#define CALC_DEBUG 0
+
+// This is faster than nsBidiPresUtils::IsFrameInParagraphDirection,
+// because it uses the frame pointer passed in without drilling down to
+// the leaf frame.
+static bool
+IsReversedDirectionFrame(nsIFrame* aFrame)
+{
+ FrameBidiData bidiData = aFrame->GetBidiData();
+ return !IS_SAME_DIRECTION(bidiData.embeddingLevel, bidiData.baseLevel);
+}
+
+#include "nsILineIterator.h"
+
+//non Hack prototypes
+#if 0
+static void RefreshContentFrames(nsPresContext* aPresContext, nsIContent * aStartContent, nsIContent * aEndContent);
+#endif
+
+#include "prenv.h"
+
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(BoxMetricsProperty, nsBoxLayoutMetrics)
+
+static void
+InitBoxMetrics(nsIFrame* aFrame, bool aClear)
+{
+ FrameProperties props = aFrame->Properties();
+ if (aClear) {
+ props.Delete(BoxMetricsProperty());
+ }
+
+ nsBoxLayoutMetrics* metrics = new nsBoxLayoutMetrics();
+ props.Set(BoxMetricsProperty(), metrics);
+
+ static_cast<nsFrame*>(aFrame)->nsFrame::MarkIntrinsicISizesDirty();
+ metrics->mBlockAscent = 0;
+ metrics->mLastSize.SizeTo(0, 0);
+}
+
+static bool
+IsXULBoxWrapped(const nsIFrame* aFrame)
+{
+ return aFrame->GetParent() &&
+ aFrame->GetParent()->IsXULBoxFrame() &&
+ !aFrame->IsXULBoxFrame();
+}
+
+// Formerly the nsIFrameDebug interface
+
+#ifdef DEBUG
+static bool gShowFrameBorders = false;
+
+void nsFrame::ShowFrameBorders(bool aEnable)
+{
+ gShowFrameBorders = aEnable;
+}
+
+bool nsFrame::GetShowFrameBorders()
+{
+ return gShowFrameBorders;
+}
+
+static bool gShowEventTargetFrameBorder = false;
+
+void nsFrame::ShowEventTargetFrameBorder(bool aEnable)
+{
+ gShowEventTargetFrameBorder = aEnable;
+}
+
+bool nsFrame::GetShowEventTargetFrameBorder()
+{
+ return gShowEventTargetFrameBorder;
+}
+
+/**
+ * Note: the log module is created during library initialization which
+ * means that you cannot perform logging before then.
+ */
+mozilla::LazyLogModule nsFrame::sFrameLogModule("frame");
+
+static mozilla::LazyLogModule sStyleVerifyTreeLogModuleInfo("styleverifytree");
+
+static uint32_t gStyleVerifyTreeEnable = 0x55;
+
+bool
+nsFrame::GetVerifyStyleTreeEnable()
+{
+ if (gStyleVerifyTreeEnable == 0x55) {
+ gStyleVerifyTreeEnable = 0 != (int)((mozilla::LogModule*)sStyleVerifyTreeLogModuleInfo)->Level();
+ }
+ return gStyleVerifyTreeEnable;
+}
+
+void
+nsFrame::SetVerifyStyleTreeEnable(bool aEnabled)
+{
+ gStyleVerifyTreeEnable = aEnabled;
+}
+
+#endif
+
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(AbsoluteContainingBlockProperty,
+ nsAbsoluteContainingBlock)
+
+bool
+nsIFrame::HasAbsolutelyPositionedChildren() const {
+ return IsAbsoluteContainer() && GetAbsoluteContainingBlock()->HasAbsoluteFrames();
+}
+
+nsAbsoluteContainingBlock*
+nsIFrame::GetAbsoluteContainingBlock() const {
+ NS_ASSERTION(IsAbsoluteContainer(), "The frame is not marked as an abspos container correctly");
+ nsAbsoluteContainingBlock* absCB = Properties().Get(AbsoluteContainingBlockProperty());
+ NS_ASSERTION(absCB, "The frame is marked as an abspos container but doesn't have the property");
+ return absCB;
+}
+
+void
+nsIFrame::MarkAsAbsoluteContainingBlock()
+{
+ MOZ_ASSERT(GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);
+ NS_ASSERTION(!Properties().Get(AbsoluteContainingBlockProperty()),
+ "Already has an abs-pos containing block property?");
+ NS_ASSERTION(!HasAnyStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN),
+ "Already has NS_FRAME_HAS_ABSPOS_CHILDREN state bit?");
+ AddStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN);
+ Properties().Set(AbsoluteContainingBlockProperty(), new nsAbsoluteContainingBlock(GetAbsoluteListID()));
+}
+
+void
+nsIFrame::MarkAsNotAbsoluteContainingBlock()
+{
+ NS_ASSERTION(!HasAbsolutelyPositionedChildren(), "Think of the children!");
+ NS_ASSERTION(Properties().Get(AbsoluteContainingBlockProperty()),
+ "Should have an abs-pos containing block property");
+ NS_ASSERTION(HasAnyStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN),
+ "Should have NS_FRAME_HAS_ABSPOS_CHILDREN state bit");
+ MOZ_ASSERT(HasAnyStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN));
+ RemoveStateBits(NS_FRAME_HAS_ABSPOS_CHILDREN);
+ Properties().Delete(AbsoluteContainingBlockProperty());
+}
+
+bool
+nsIFrame::CheckAndClearPaintedState()
+{
+ bool result = (GetStateBits() & NS_FRAME_PAINTED_THEBES);
+ RemoveStateBits(NS_FRAME_PAINTED_THEBES);
+
+ nsIFrame::ChildListIterator lists(this);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ nsIFrame* child = childFrames.get();
+ if (child->CheckAndClearPaintedState()) {
+ result = true;
+ }
+ }
+ }
+ return result;
+}
+
+bool
+nsIFrame::IsVisibleConsideringAncestors(uint32_t aFlags) const
+{
+ if (!StyleVisibility()->IsVisible()) {
+ return false;
+ }
+
+ const nsIFrame* frame = this;
+ while (frame) {
+ nsView* view = frame->GetView();
+ if (view && view->GetVisibility() == nsViewVisibility_kHide)
+ return false;
+
+ nsIFrame* parent = frame->GetParent();
+ nsDeckFrame* deck = do_QueryFrame(parent);
+ if (deck) {
+ if (deck->GetSelectedBox() != frame)
+ return false;
+ }
+
+ if (parent) {
+ frame = parent;
+ } else {
+ parent = nsLayoutUtils::GetCrossDocParentFrame(frame);
+ if (!parent)
+ break;
+
+ if ((aFlags & nsIFrame::VISIBILITY_CROSS_CHROME_CONTENT_BOUNDARY) == 0 &&
+ parent->PresContext()->IsChrome() && !frame->PresContext()->IsChrome()) {
+ break;
+ }
+
+ if (!parent->StyleVisibility()->IsVisible())
+ return false;
+
+ frame = parent;
+ }
+ }
+
+ return true;
+}
+
+void
+nsIFrame::FindCloserFrameForSelection(
+ nsPoint aPoint,
+ nsIFrame::FrameWithDistance* aCurrentBestFrame)
+{
+ if (nsLayoutUtils::PointIsCloserToRect(aPoint, mRect,
+ aCurrentBestFrame->mXDistance,
+ aCurrentBestFrame->mYDistance)) {
+ aCurrentBestFrame->mFrame = this;
+ }
+}
+
+void
+nsIFrame::ContentStatesChanged(mozilla::EventStates aStates)
+{
+}
+
+void
+NS_MergeReflowStatusInto(nsReflowStatus* aPrimary, nsReflowStatus aSecondary)
+{
+ *aPrimary |= aSecondary &
+ (NS_FRAME_NOT_COMPLETE | NS_FRAME_OVERFLOW_INCOMPLETE |
+ NS_FRAME_TRUNCATED | NS_FRAME_REFLOW_NEXTINFLOW);
+ if (*aPrimary & NS_FRAME_NOT_COMPLETE) {
+ *aPrimary &= ~NS_FRAME_OVERFLOW_INCOMPLETE;
+ }
+}
+
+void
+nsWeakFrame::Init(nsIFrame* aFrame)
+{
+ Clear(mFrame ? mFrame->PresContext()->GetPresShell() : nullptr);
+ mFrame = aFrame;
+ if (mFrame) {
+ nsIPresShell* shell = mFrame->PresContext()->GetPresShell();
+ NS_WARNING_ASSERTION(shell, "Null PresShell in nsWeakFrame!");
+ if (shell) {
+ shell->AddWeakFrame(this);
+ } else {
+ mFrame = nullptr;
+ }
+ }
+}
+
+nsIFrame*
+NS_NewEmptyFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsFrame(aContext);
+}
+
+nsFrame::nsFrame(nsStyleContext* aContext)
+{
+ MOZ_COUNT_CTOR(nsFrame);
+
+ mState = NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY;
+ mStyleContext = aContext;
+ mStyleContext->AddRef();
+#ifdef DEBUG
+ mStyleContext->FrameAddRef();
+#endif
+}
+
+nsFrame::~nsFrame()
+{
+ MOZ_COUNT_DTOR(nsFrame);
+
+ MOZ_ASSERT(GetVisibility() != Visibility::APPROXIMATELY_VISIBLE,
+ "Visible nsFrame is being destroyed");
+
+ NS_IF_RELEASE(mContent);
+#ifdef DEBUG
+ mStyleContext->FrameRelease();
+#endif
+ mStyleContext->Release();
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsFrame)
+
+// Dummy operator delete. Will never be called, but must be defined
+// to satisfy some C++ ABIs.
+void
+nsFrame::operator delete(void *, size_t)
+{
+ NS_RUNTIMEABORT("nsFrame::operator delete should never be called");
+}
+
+NS_QUERYFRAME_HEAD(nsFrame)
+ NS_QUERYFRAME_ENTRY(nsIFrame)
+NS_QUERYFRAME_TAIL_INHERITANCE_ROOT
+
+/////////////////////////////////////////////////////////////////////////////
+// nsIFrame
+
+static bool
+IsFontSizeInflationContainer(nsIFrame* aFrame,
+ const nsStyleDisplay* aStyleDisplay)
+{
+ /*
+ * Font size inflation is built around the idea that we're inflating
+ * the fonts for a pan-and-zoom UI so that when the user scales up a
+ * block or other container to fill the width of the device, the fonts
+ * will be readable. To do this, we need to pick what counts as a
+ * container.
+ *
+ * From a code perspective, the only hard requirement is that frames
+ * that are line participants
+ * (nsIFrame::IsFrameOfType(nsIFrame::eLineParticipant)) are never
+ * containers, since line layout assumes that the inflation is
+ * consistent within a line.
+ *
+ * This is not an imposition, since we obviously want a bunch of text
+ * (possibly with inline elements) flowing within a block to count the
+ * block (or higher) as its container.
+ *
+ * We also want form controls, including the text in the anonymous
+ * content inside of them, to match each other and the text next to
+ * them, so they and their anonymous content should also not be a
+ * container.
+ *
+ * However, because we can't reliably compute sizes across XUL during
+ * reflow, any XUL frame with a XUL parent is always a container.
+ *
+ * There are contexts where it would be nice if some blocks didn't
+ * count as a container, so that, for example, an indented quotation
+ * didn't end up with a smaller font size. However, it's hard to
+ * distinguish these situations where we really do want the indented
+ * thing to count as a container, so we don't try, and blocks are
+ * always containers.
+ */
+
+ // The root frame should always be an inflation container.
+ if (!aFrame->GetParent()) {
+ return true;
+ }
+
+ nsIContent *content = aFrame->GetContent();
+ nsIAtom* frameType = aFrame->GetType();
+ bool isInline = (aFrame->GetDisplay() == StyleDisplay::Inline ||
+ RubyUtils::IsRubyBox(frameType) ||
+ (aFrame->IsFloating() &&
+ frameType == nsGkAtoms::letterFrame) ||
+ // Given multiple frames for the same node, only the
+ // outer one should be considered a container.
+ // (Important, e.g., for nsSelectsAreaFrame.)
+ (aFrame->GetParent()->GetContent() == content) ||
+ (content && (content->IsAnyOfHTMLElements(nsGkAtoms::option,
+ nsGkAtoms::optgroup,
+ nsGkAtoms::select) ||
+ content->IsInNativeAnonymousSubtree()))) &&
+ !(aFrame->IsXULBoxFrame() && aFrame->GetParent()->IsXULBoxFrame());
+ NS_ASSERTION(!aFrame->IsFrameOfType(nsIFrame::eLineParticipant) ||
+ isInline ||
+ // br frames and mathml frames report being line
+ // participants even when their position or display is
+ // set
+ aFrame->GetType() == nsGkAtoms::brFrame ||
+ aFrame->IsFrameOfType(nsIFrame::eMathML),
+ "line participants must not be containers");
+ NS_ASSERTION(aFrame->GetType() != nsGkAtoms::bulletFrame || isInline,
+ "bullets should not be containers");
+ return !isInline;
+}
+
+void
+nsFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ NS_PRECONDITION(!mContent, "Double-initing a frame?");
+ NS_ASSERTION(IsFrameOfType(eDEBUGAllFrames) &&
+ !IsFrameOfType(eDEBUGNoFrames),
+ "IsFrameOfType implementation that doesn't call base class");
+
+ mContent = aContent;
+ mParent = aParent;
+
+ if (aContent) {
+ NS_ADDREF(aContent);
+ }
+
+ if (aPrevInFlow) {
+ // Make sure the general flags bits are the same
+ nsFrameState state = aPrevInFlow->GetStateBits();
+
+ // Make bits that are currently off (see constructor) the same:
+ mState |= state & (NS_FRAME_INDEPENDENT_SELECTION |
+ NS_FRAME_PART_OF_IBSPLIT |
+ NS_FRAME_MAY_BE_TRANSFORMED |
+ NS_FRAME_MAY_HAVE_GENERATED_CONTENT |
+ NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN);
+ } else {
+ PresContext()->ConstructedFrame();
+ }
+ if (GetParent()) {
+ nsFrameState state = GetParent()->GetStateBits();
+
+ // Make bits that are currently off (see constructor) the same:
+ mState |= state & (NS_FRAME_INDEPENDENT_SELECTION |
+ NS_FRAME_GENERATED_CONTENT |
+ NS_FRAME_IS_SVG_TEXT |
+ NS_FRAME_IN_POPUP |
+ NS_FRAME_IS_NONDISPLAY);
+
+ if (HasAnyStateBits(NS_FRAME_IN_POPUP) && TrackingVisibility()) {
+ // Assume all frames in popups are visible.
+ IncApproximateVisibleCount();
+ }
+ }
+ const nsStyleDisplay *disp = StyleDisplay();
+ if (disp->HasTransform(this) ||
+ (IsFrameOfType(eSupportsCSSTransforms) &&
+ nsLayoutUtils::HasAnimationOfProperty(this, eCSSProperty_transform))) {
+ // The frame gets reconstructed if we toggle the -moz-transform
+ // property, so we can set this bit here and then ignore it.
+ mState |= NS_FRAME_MAY_BE_TRANSFORMED;
+ }
+ if (disp->mPosition == NS_STYLE_POSITION_STICKY &&
+ !aPrevInFlow &&
+ !(mState & NS_FRAME_IS_NONDISPLAY) &&
+ !disp->IsInnerTableStyle()) {
+ // Note that we only add first continuations, but we really only
+ // want to add first continuation-or-ib-split-siblings. But since we
+ // don't yet know if we're a later part of a block-in-inline split,
+ // we'll just add later members of a block-in-inline split here, and
+ // then StickyScrollContainer will remove them later.
+ // We don't currently support relative positioning of inner table
+ // elements (bug 35168), so exclude them from sticky positioning too.
+ StickyScrollContainer* ssc =
+ StickyScrollContainer::GetStickyScrollContainerForFrame(this);
+ if (ssc) {
+ ssc->AddFrame(this);
+ }
+ }
+
+ if (nsLayoutUtils::FontSizeInflationEnabled(PresContext()) || !GetParent()
+#ifdef DEBUG
+ // We have assertions that check inflation invariants even when
+ // font size inflation is not enabled.
+ || true
+#endif
+ ) {
+ if (IsFontSizeInflationContainer(this, disp)) {
+ AddStateBits(NS_FRAME_FONT_INFLATION_CONTAINER);
+ if (!GetParent() ||
+ // I'd use NS_FRAME_OUT_OF_FLOW, but it's not set yet.
+ disp->IsFloating(this) || disp->IsAbsolutelyPositioned(this)) {
+ AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);
+ }
+ }
+ NS_ASSERTION(GetParent() ||
+ (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER),
+ "root frame should always be a container");
+ }
+
+ if (PresContext()->PresShell()->AssumeAllFramesVisible() &&
+ TrackingVisibility()) {
+ IncApproximateVisibleCount();
+ }
+
+ DidSetStyleContext(nullptr);
+
+ if (::IsXULBoxWrapped(this))
+ ::InitBoxMetrics(this, false);
+}
+
+void
+nsFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+ NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
+ "destroy called on frame while scripts not blocked");
+ NS_ASSERTION(!GetNextSibling() && !GetPrevSibling(),
+ "Frames should be removed before destruction.");
+ NS_ASSERTION(aDestructRoot, "Must specify destruct root");
+ MOZ_ASSERT(!HasAbsolutelyPositionedChildren());
+
+ nsSVGEffects::InvalidateDirectRenderingObservers(this);
+
+ if (StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY) {
+ StickyScrollContainer* ssc =
+ StickyScrollContainer::GetStickyScrollContainerForFrame(this);
+ if (ssc) {
+ ssc->RemoveFrame(this);
+ }
+ }
+
+ // Get the view pointer now before the frame properties disappear
+ // when we call NotifyDestroyingFrame()
+ nsView* view = GetView();
+ nsPresContext* presContext = PresContext();
+
+ nsIPresShell *shell = presContext->GetPresShell();
+ if (mState & NS_FRAME_OUT_OF_FLOW) {
+ nsPlaceholderFrame* placeholder =
+ shell->FrameManager()->GetPlaceholderFrameFor(this);
+ NS_ASSERTION(!placeholder || (aDestructRoot != this),
+ "Don't call Destroy() on OOFs, call Destroy() on the placeholder.");
+ NS_ASSERTION(!placeholder ||
+ nsLayoutUtils::IsProperAncestorFrame(aDestructRoot, placeholder),
+ "Placeholder relationship should have been torn down already; "
+ "this might mean we have a stray placeholder in the tree.");
+ if (placeholder) {
+ shell->FrameManager()->UnregisterPlaceholderFrame(placeholder);
+ placeholder->SetOutOfFlowFrame(nullptr);
+ }
+ }
+
+ // If we have any IB split siblings, clear their references to us.
+ // (Note: This has to happen before we call shell->NotifyDestroyingFrame,
+ // because that clears our Properties() table.)
+ if (mState & NS_FRAME_PART_OF_IBSPLIT) {
+ // Delete previous sibling's reference to me.
+ nsIFrame* prevSib = Properties().Get(nsIFrame::IBSplitPrevSibling());
+ if (prevSib) {
+ NS_WARNING_ASSERTION(
+ this == prevSib->Properties().Get(nsIFrame::IBSplitSibling()),
+ "IB sibling chain is inconsistent");
+ prevSib->Properties().Delete(nsIFrame::IBSplitSibling());
+ }
+
+ // Delete next sibling's reference to me.
+ nsIFrame* nextSib = Properties().Get(nsIFrame::IBSplitSibling());
+ if (nextSib) {
+ NS_WARNING_ASSERTION(
+ this == nextSib->Properties().Get(nsIFrame::IBSplitPrevSibling()),
+ "IB sibling chain is inconsistent");
+ nextSib->Properties().Delete(nsIFrame::IBSplitPrevSibling());
+ }
+ }
+
+ bool isPrimaryFrame = (mContent && mContent->GetPrimaryFrame() == this);
+ if (isPrimaryFrame) {
+ // This needs to happen before shell->NotifyDestroyingFrame because
+ // that clears our Properties() table.
+ ActiveLayerTracker::TransferActivityToContent(this, mContent);
+
+ // Unfortunately, we need to do this for all frames being reframed
+ // and not only those whose current style involves CSS transitions,
+ // because what matters is whether the new style (not the old)
+ // specifies CSS transitions.
+ if (presContext->RestyleManager()->IsGecko()) {
+ // stylo: ServoRestyleManager does not handle transitions yet, and when
+ // it does it probably won't need to track reframed style contexts to
+ // initiate transitions correctly.
+ RestyleManager::ReframingStyleContexts* rsc =
+ presContext->RestyleManager()->AsGecko()->GetReframingStyleContexts();
+ if (rsc) {
+ rsc->Put(mContent, mStyleContext);
+ }
+ }
+ }
+
+ if (HasCSSAnimations() || HasCSSTransitions() ||
+ EffectSet::GetEffectSet(this)) {
+ // If no new frame for this element is created by the end of the
+ // restyling process, stop animations and transitions for this frame
+ if (presContext->RestyleManager()->IsGecko()) {
+ RestyleManager::AnimationsWithDestroyedFrame* adf =
+ presContext->RestyleManager()->AsGecko()->GetAnimationsWithDestroyedFrame();
+ // AnimationsWithDestroyedFrame only lives during the restyling process.
+ if (adf) {
+ adf->Put(mContent, mStyleContext);
+ }
+ } else {
+ NS_ERROR("stylo: ServoRestyleManager does not support animations yet");
+ }
+ }
+
+ // Disable visibility tracking. Note that we have to do this before calling
+ // NotifyDestroyingFrame(), which will clear frame properties and make us lose
+ // track of whether we were previously visible or not.
+ // XXX(seth): It'd be ideal to assert that we're already marked nonvisible
+ // here, but it's unfortunately tricky to guarantee in the face of things like
+ // frame reconstruction induced by style changes.
+ DisableVisibilityTracking();
+
+ // Ensure that we're not in the approximately visible list anymore.
+ PresContext()->GetPresShell()->RemoveFrameFromApproximatelyVisibleList(this);
+
+ shell->NotifyDestroyingFrame(this);
+
+ if (mState & NS_FRAME_EXTERNAL_REFERENCE) {
+ shell->ClearFrameRefs(this);
+ }
+
+ if (view) {
+ // Break association between view and frame
+ view->SetFrame(nullptr);
+
+ // Destroy the view
+ view->Destroy();
+ }
+
+ // Make sure that our deleted frame can't be returned from GetPrimaryFrame()
+ if (isPrimaryFrame) {
+ mContent->SetPrimaryFrame(nullptr);
+ }
+
+ // Must retrieve the object ID before calling destructors, so the
+ // vtable is still valid.
+ //
+ // Note to future tweakers: having the method that returns the
+ // object size call the destructor will not avoid an indirect call;
+ // the compiler cannot devirtualize the call to the destructor even
+ // if it's from a method defined in the same class.
+
+ nsQueryFrame::FrameIID id = GetFrameId();
+ this->~nsFrame();
+
+ // Now that we're totally cleaned out, we need to add ourselves to
+ // the presshell's recycler.
+ shell->FreeFrame(id, this);
+}
+
+nsresult
+nsFrame::GetOffsets(int32_t &aStart, int32_t &aEnd) const
+{
+ aStart = 0;
+ aEnd = 0;
+ return NS_OK;
+}
+
+static
+void
+AddAndRemoveImageAssociations(nsFrame* aFrame,
+ const nsStyleImageLayers* aOldLayers,
+ const nsStyleImageLayers* aNewLayers)
+{
+ ImageLoader* imageLoader =
+ aFrame->PresContext()->Document()->StyleImageLoader();
+
+ // If the old context had a background-image image, or mask-image image,
+ // and new context does not have the same image, clear the image load
+ // notifier (which keeps the image loading, if it still is) for the frame.
+ // We want to do this conservatively because some frames paint their
+ // backgrounds from some other frame's style data, and we don't want
+ // to clear those notifiers unless we have to. (They'll be reset
+ // when we paint, although we could miss a notification in that
+ // interval.)
+
+ if (aOldLayers) {
+ NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, (*aOldLayers)) {
+ // If there is an image in oldBG that's not in newBG, drop it.
+ if (i >= aNewLayers->mImageCount ||
+ !aOldLayers->mLayers[i].mImage.ImageDataEquals(
+ aNewLayers->mLayers[i].mImage)) {
+ const nsStyleImage& oldImage = aOldLayers->mLayers[i].mImage;
+ if (oldImage.GetType() != eStyleImageType_Image) {
+ continue;
+ }
+
+ if (imgRequestProxy* req = oldImage.GetImageData()) {
+ imageLoader->DisassociateRequestFromFrame(req, aFrame);
+ }
+ }
+ }
+ }
+
+ NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, (*aNewLayers)) {
+ // If there is an image in newBG that's not in oldBG, add it.
+ if (!aOldLayers || i >= aOldLayers->mImageCount ||
+ !aNewLayers->mLayers[i].mImage.ImageDataEquals(
+ aOldLayers->mLayers[i].mImage)) {
+ const nsStyleImage& newImage = aNewLayers->mLayers[i].mImage;
+ if (newImage.GetType() != eStyleImageType_Image) {
+ continue;
+ }
+
+ if (imgRequestProxy* req = newImage.GetImageData()) {
+ imageLoader->AssociateRequestToFrame(req, aFrame);
+ }
+ }
+ }
+}
+
+// Subclass hook for style post processing
+/* virtual */ void
+nsFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
+{
+ if (IsSVGText()) {
+ SVGTextFrame* svgTextFrame = static_cast<SVGTextFrame*>(
+ nsLayoutUtils::GetClosestFrameOfType(this, nsGkAtoms::svgTextFrame));
+ nsIFrame* anonBlock = svgTextFrame->PrincipalChildList().FirstChild();
+ // Just as in SVGTextFrame::DidSetStyleContext, we need to ensure that
+ // any non-display SVGTextFrames get reflowed when a child text frame
+ // gets new style.
+ //
+ // Note that we must check NS_FRAME_FIRST_REFLOW on our SVGTextFrame's
+ // anonymous block frame rather than our self, since NS_FRAME_FIRST_REFLOW
+ // may be set on us if we're a new frame that has been inserted after the
+ // document's first reflow. (In which case this DidSetStyleContext call may
+ // be happening under frame construction under a Reflow() call.)
+ if (anonBlock && !(anonBlock->GetStateBits() & NS_FRAME_FIRST_REFLOW) &&
+ (svgTextFrame->GetStateBits() & NS_FRAME_IS_NONDISPLAY) &&
+ !(svgTextFrame->GetStateBits() & NS_STATE_SVG_TEXT_IN_REFLOW)) {
+ svgTextFrame->ScheduleReflowSVGNonDisplayText(nsIPresShell::eStyleChange);
+ }
+ }
+
+ const nsStyleImageLayers *oldLayers = aOldStyleContext ?
+ &aOldStyleContext->StyleBackground()->mImage :
+ nullptr;
+ const nsStyleImageLayers *newLayers = &StyleBackground()->mImage;
+ AddAndRemoveImageAssociations(this, oldLayers, newLayers);
+
+ oldLayers = aOldStyleContext ? &aOldStyleContext->StyleSVGReset()->mMask :
+ nullptr;
+ newLayers = &StyleSVGReset()->mMask;
+ AddAndRemoveImageAssociations(this, oldLayers, newLayers);
+
+ if (aOldStyleContext) {
+ // If we detect a change on margin, padding or border, we store the old
+ // values on the frame itself between now and reflow, so if someone
+ // calls GetUsed(Margin|Border|Padding)() before the next reflow, we
+ // can give an accurate answer.
+ // We don't want to set the property if one already exists.
+ FrameProperties props = Properties();
+ nsMargin oldValue(0, 0, 0, 0);
+ nsMargin newValue(0, 0, 0, 0);
+ const nsStyleMargin* oldMargin = aOldStyleContext->PeekStyleMargin();
+ if (oldMargin && oldMargin->GetMargin(oldValue)) {
+ if ((!StyleMargin()->GetMargin(newValue) || oldValue != newValue) &&
+ !props.Get(UsedMarginProperty())) {
+ props.Set(UsedMarginProperty(), new nsMargin(oldValue));
+ }
+ }
+
+ const nsStylePadding* oldPadding = aOldStyleContext->PeekStylePadding();
+ if (oldPadding && oldPadding->GetPadding(oldValue)) {
+ if ((!StylePadding()->GetPadding(newValue) || oldValue != newValue) &&
+ !props.Get(UsedPaddingProperty())) {
+ props.Set(UsedPaddingProperty(), new nsMargin(oldValue));
+ }
+ }
+
+ const nsStyleBorder* oldBorder = aOldStyleContext->PeekStyleBorder();
+ if (oldBorder) {
+ oldValue = oldBorder->GetComputedBorder();
+ newValue = StyleBorder()->GetComputedBorder();
+ if (oldValue != newValue &&
+ !props.Get(UsedBorderProperty())) {
+ props.Set(UsedBorderProperty(), new nsMargin(oldValue));
+ }
+ }
+ }
+
+ ImageLoader* imageLoader = PresContext()->Document()->StyleImageLoader();
+ imgIRequest *oldBorderImage = aOldStyleContext
+ ? aOldStyleContext->StyleBorder()->GetBorderImageRequest()
+ : nullptr;
+ imgIRequest *newBorderImage = StyleBorder()->GetBorderImageRequest();
+ // FIXME (Bug 759996): The following is no longer true.
+ // For border-images, we can't be as conservative (we need to set the
+ // new loaders if there has been any change) since the CalcDifference
+ // call depended on the result of GetComputedBorder() and that result
+ // depends on whether the image has loaded, start the image load now
+ // so that we'll get notified when it completes loading and can do a
+ // restyle. Otherwise, the image might finish loading from the
+ // network before we start listening to its notifications, and then
+ // we'll never know that it's finished loading. Likewise, we want to
+ // do this for freshly-created frames to prevent a similar race if the
+ // image loads between reflow (which can depend on whether the image
+ // is loaded) and paint. We also don't really care about any callers
+ // who try to paint borders with a different style context, because
+ // they won't have the correct size for the border either.
+ if (oldBorderImage != newBorderImage) {
+ // stop and restart the image loading/notification
+ if (oldBorderImage) {
+ imageLoader->DisassociateRequestFromFrame(oldBorderImage, this);
+ }
+ if (newBorderImage) {
+ imageLoader->AssociateRequestToFrame(newBorderImage, this);
+ }
+ }
+
+ // If the page contains markup that overrides text direction, and
+ // does not contain any characters that would activate the Unicode
+ // bidi algorithm, we need to call |SetBidiEnabled| on the pres
+ // context before reflow starts. See bug 115921.
+ if (StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL) {
+ PresContext()->SetBidiEnabled();
+ }
+
+ RemoveStateBits(NS_FRAME_SIMPLE_EVENT_REGIONS);
+}
+
+// MSVC fails with link error "one or more multiply defined symbols found",
+// gcc fails with "hidden symbol `nsIFrame::kPrincipalList' isn't defined"
+// etc if they are not defined.
+#ifndef _MSC_VER
+// static nsIFrame constants; initialized in the header file.
+const nsIFrame::ChildListID nsIFrame::kPrincipalList;
+const nsIFrame::ChildListID nsIFrame::kAbsoluteList;
+const nsIFrame::ChildListID nsIFrame::kBulletList;
+const nsIFrame::ChildListID nsIFrame::kCaptionList;
+const nsIFrame::ChildListID nsIFrame::kColGroupList;
+const nsIFrame::ChildListID nsIFrame::kExcessOverflowContainersList;
+const nsIFrame::ChildListID nsIFrame::kFixedList;
+const nsIFrame::ChildListID nsIFrame::kFloatList;
+const nsIFrame::ChildListID nsIFrame::kOverflowContainersList;
+const nsIFrame::ChildListID nsIFrame::kOverflowList;
+const nsIFrame::ChildListID nsIFrame::kOverflowOutOfFlowList;
+const nsIFrame::ChildListID nsIFrame::kPopupList;
+const nsIFrame::ChildListID nsIFrame::kPushedFloatsList;
+const nsIFrame::ChildListID nsIFrame::kSelectPopupList;
+const nsIFrame::ChildListID nsIFrame::kNoReflowPrincipalList;
+#endif
+
+/* virtual */ nsMargin
+nsIFrame::GetUsedMargin() const
+{
+ nsMargin margin(0, 0, 0, 0);
+ if (((mState & NS_FRAME_FIRST_REFLOW) &&
+ !(mState & NS_FRAME_IN_REFLOW)) ||
+ IsSVGText())
+ return margin;
+
+ nsMargin *m = Properties().Get(UsedMarginProperty());
+ if (m) {
+ margin = *m;
+ } else {
+ if (!StyleMargin()->GetMargin(margin)) {
+ // If we get here, our caller probably shouldn't be calling us...
+ NS_ERROR("Returning bogus 0-sized margin, because this margin "
+ "depends on layout & isn't cached!");
+ }
+ }
+ return margin;
+}
+
+/* virtual */ nsMargin
+nsIFrame::GetUsedBorder() const
+{
+ nsMargin border(0, 0, 0, 0);
+ if (((mState & NS_FRAME_FIRST_REFLOW) &&
+ !(mState & NS_FRAME_IN_REFLOW)) ||
+ IsSVGText())
+ return border;
+
+ // Theme methods don't use const-ness.
+ nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
+
+ const nsStyleDisplay *disp = StyleDisplay();
+ if (mutable_this->IsThemed(disp)) {
+ nsIntMargin result;
+ nsPresContext *presContext = PresContext();
+ presContext->GetTheme()->GetWidgetBorder(presContext->DeviceContext(),
+ mutable_this, disp->mAppearance,
+ &result);
+ border.left = presContext->DevPixelsToAppUnits(result.left);
+ border.top = presContext->DevPixelsToAppUnits(result.top);
+ border.right = presContext->DevPixelsToAppUnits(result.right);
+ border.bottom = presContext->DevPixelsToAppUnits(result.bottom);
+ return border;
+ }
+
+ nsMargin *b = Properties().Get(UsedBorderProperty());
+ if (b) {
+ border = *b;
+ } else {
+ border = StyleBorder()->GetComputedBorder();
+ }
+ return border;
+}
+
+/* virtual */ nsMargin
+nsIFrame::GetUsedPadding() const
+{
+ nsMargin padding(0, 0, 0, 0);
+ if (((mState & NS_FRAME_FIRST_REFLOW) &&
+ !(mState & NS_FRAME_IN_REFLOW)) ||
+ IsSVGText())
+ return padding;
+
+ // Theme methods don't use const-ness.
+ nsIFrame *mutable_this = const_cast<nsIFrame*>(this);
+
+ const nsStyleDisplay *disp = StyleDisplay();
+ if (mutable_this->IsThemed(disp)) {
+ nsPresContext *presContext = PresContext();
+ nsIntMargin widget;
+ if (presContext->GetTheme()->GetWidgetPadding(presContext->DeviceContext(),
+ mutable_this,
+ disp->mAppearance,
+ &widget)) {
+ padding.top = presContext->DevPixelsToAppUnits(widget.top);
+ padding.right = presContext->DevPixelsToAppUnits(widget.right);
+ padding.bottom = presContext->DevPixelsToAppUnits(widget.bottom);
+ padding.left = presContext->DevPixelsToAppUnits(widget.left);
+ return padding;
+ }
+ }
+
+ nsMargin *p = Properties().Get(UsedPaddingProperty());
+ if (p) {
+ padding = *p;
+ } else {
+ if (!StylePadding()->GetPadding(padding)) {
+ // If we get here, our caller probably shouldn't be calling us...
+ NS_ERROR("Returning bogus 0-sized padding, because this padding "
+ "depends on layout & isn't cached!");
+ }
+ }
+ return padding;
+}
+
+nsIFrame::Sides
+nsIFrame::GetSkipSides(const ReflowInput* aReflowInput) const
+{
+ if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
+ StyleBoxDecorationBreak::Clone) &&
+ !(GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER)) {
+ return Sides();
+ }
+
+ // Convert the logical skip sides to physical sides using the frame's
+ // writing mode
+ WritingMode writingMode = GetWritingMode();
+ LogicalSides logicalSkip = GetLogicalSkipSides(aReflowInput);
+ Sides skip;
+
+ if (logicalSkip.BStart()) {
+ if (writingMode.IsVertical()) {
+ skip |= writingMode.IsVerticalLR() ? eSideBitsLeft : eSideBitsRight;
+ } else {
+ skip |= eSideBitsTop;
+ }
+ }
+
+ if (logicalSkip.BEnd()) {
+ if (writingMode.IsVertical()) {
+ skip |= writingMode.IsVerticalLR() ? eSideBitsRight : eSideBitsLeft;
+ } else {
+ skip |= eSideBitsBottom;
+ }
+ }
+
+ if (logicalSkip.IStart()) {
+ if (writingMode.IsVertical()) {
+ skip |= eSideBitsTop;
+ } else {
+ skip |= writingMode.IsBidiLTR() ? eSideBitsLeft : eSideBitsRight;
+ }
+ }
+
+ if (logicalSkip.IEnd()) {
+ if (writingMode.IsVertical()) {
+ skip |= eSideBitsBottom;
+ } else {
+ skip |= writingMode.IsBidiLTR() ? eSideBitsRight : eSideBitsLeft;
+ }
+ }
+ return skip;
+}
+
+nsRect
+nsIFrame::GetPaddingRectRelativeToSelf() const
+{
+ nsMargin border(GetUsedBorder());
+ border.ApplySkipSides(GetSkipSides());
+ nsRect r(0, 0, mRect.width, mRect.height);
+ r.Deflate(border);
+ return r;
+}
+
+nsRect
+nsIFrame::GetPaddingRect() const
+{
+ return GetPaddingRectRelativeToSelf() + GetPosition();
+}
+
+WritingMode
+nsIFrame::GetWritingMode(nsIFrame* aSubFrame) const
+{
+ WritingMode writingMode = GetWritingMode();
+
+ if (StyleTextReset()->mUnicodeBidi & NS_STYLE_UNICODE_BIDI_PLAINTEXT) {
+ nsBidiLevel frameLevel = nsBidiPresUtils::GetFrameBaseLevel(aSubFrame);
+ writingMode.SetDirectionFromBidiLevel(frameLevel);
+ }
+
+ return writingMode;
+}
+
+nsRect
+nsIFrame::GetMarginRectRelativeToSelf() const
+{
+ nsMargin m = GetUsedMargin();
+ m.ApplySkipSides(GetSkipSides());
+ nsRect r(0, 0, mRect.width, mRect.height);
+ r.Inflate(m);
+ return r;
+}
+
+bool
+nsIFrame::IsTransformed() const
+{
+ return ((mState & NS_FRAME_MAY_BE_TRANSFORMED) &&
+ (StyleDisplay()->HasTransform(this) ||
+ IsSVGTransformed() ||
+ (mContent &&
+ nsLayoutUtils::HasAnimationOfProperty(this,
+ eCSSProperty_transform) &&
+ IsFrameOfType(eSupportsCSSTransforms) &&
+ mContent->GetPrimaryFrame() == this)));
+}
+
+bool
+nsIFrame::HasOpacityInternal(float aThreshold) const
+{
+ MOZ_ASSERT(0.0 <= aThreshold && aThreshold <= 1.0, "Invalid argument");
+ return StyleEffects()->mOpacity < aThreshold ||
+ (StyleDisplay()->mWillChangeBitField & NS_STYLE_WILL_CHANGE_OPACITY) ||
+ (mContent &&
+ nsLayoutUtils::HasAnimationOfProperty(this, eCSSProperty_opacity) &&
+ mContent->GetPrimaryFrame() == this);
+}
+
+bool
+nsIFrame::IsSVGTransformed(gfx::Matrix *aOwnTransforms,
+ gfx::Matrix *aFromParentTransforms) const
+{
+ return false;
+}
+
+bool
+nsIFrame::Extend3DContext() const
+{
+ const nsStyleDisplay* disp = StyleDisplay();
+ if (disp->mTransformStyle != NS_STYLE_TRANSFORM_STYLE_PRESERVE_3D ||
+ !IsFrameOfType(nsIFrame::eSupportsCSSTransforms)) {
+ return false;
+ }
+
+ // If we're all scroll frame, then all descendants will be clipped, so we can't preserve 3d.
+ if (GetType() == nsGkAtoms::scrollFrame) {
+ return false;
+ }
+
+ if (HasOpacity()) {
+ return false;
+ }
+
+ const nsStyleEffects* effects = StyleEffects();
+ return !nsFrame::ShouldApplyOverflowClipping(this, disp) &&
+ !GetClipPropClipRect(disp, effects, GetSize()) &&
+ !nsSVGIntegrationUtils::UsingEffectsForFrame(this);
+}
+
+bool
+nsIFrame::Combines3DTransformWithAncestors() const
+{
+ if (!GetParent() || !GetParent()->Extend3DContext()) {
+ return false;
+ }
+ return IsTransformed() || BackfaceIsHidden();
+}
+
+bool
+nsIFrame::In3DContextAndBackfaceIsHidden() const
+{
+ return Combines3DTransformWithAncestors() && BackfaceIsHidden();
+}
+
+bool
+nsIFrame::HasPerspective() const
+{
+ if (!IsTransformed()) {
+ return false;
+ }
+ nsIFrame* containingBlock = GetContainingBlock(SKIP_SCROLLED_FRAME);
+ if (!containingBlock) {
+ return false;
+ }
+ return containingBlock->ChildrenHavePerspective();
+}
+
+bool
+nsIFrame::ChildrenHavePerspective() const
+{
+ return StyleDisplay()->HasPerspectiveStyle();
+}
+
+nsRect
+nsIFrame::GetContentRectRelativeToSelf() const
+{
+ nsMargin bp(GetUsedBorderAndPadding());
+ bp.ApplySkipSides(GetSkipSides());
+ nsRect r(0, 0, mRect.width, mRect.height);
+ r.Deflate(bp);
+ return r;
+}
+
+nsRect
+nsIFrame::GetContentRect() const
+{
+ return GetContentRectRelativeToSelf() + GetPosition();
+}
+
+bool
+nsIFrame::ComputeBorderRadii(const nsStyleCorners& aBorderRadius,
+ const nsSize& aFrameSize,
+ const nsSize& aBorderArea,
+ Sides aSkipSides,
+ nscoord aRadii[8])
+{
+ // Percentages are relative to whichever side they're on.
+ NS_FOR_CSS_HALF_CORNERS(i) {
+ const nsStyleCoord c = aBorderRadius.Get(i);
+ nscoord axis =
+ NS_HALF_CORNER_IS_X(i) ? aFrameSize.width : aFrameSize.height;
+
+ if (c.IsCoordPercentCalcUnit()) {
+ aRadii[i] = nsRuleNode::ComputeCoordPercentCalc(c, axis);
+ if (aRadii[i] < 0) {
+ // clamp calc()
+ aRadii[i] = 0;
+ }
+ } else {
+ NS_NOTREACHED("ComputeBorderRadii: bad unit");
+ aRadii[i] = 0;
+ }
+ }
+
+ if (aSkipSides.Top()) {
+ aRadii[NS_CORNER_TOP_LEFT_X] = 0;
+ aRadii[NS_CORNER_TOP_LEFT_Y] = 0;
+ aRadii[NS_CORNER_TOP_RIGHT_X] = 0;
+ aRadii[NS_CORNER_TOP_RIGHT_Y] = 0;
+ }
+
+ if (aSkipSides.Right()) {
+ aRadii[NS_CORNER_TOP_RIGHT_X] = 0;
+ aRadii[NS_CORNER_TOP_RIGHT_Y] = 0;
+ aRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0;
+ aRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0;
+ }
+
+ if (aSkipSides.Bottom()) {
+ aRadii[NS_CORNER_BOTTOM_RIGHT_X] = 0;
+ aRadii[NS_CORNER_BOTTOM_RIGHT_Y] = 0;
+ aRadii[NS_CORNER_BOTTOM_LEFT_X] = 0;
+ aRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0;
+ }
+
+ if (aSkipSides.Left()) {
+ aRadii[NS_CORNER_BOTTOM_LEFT_X] = 0;
+ aRadii[NS_CORNER_BOTTOM_LEFT_Y] = 0;
+ aRadii[NS_CORNER_TOP_LEFT_X] = 0;
+ aRadii[NS_CORNER_TOP_LEFT_Y] = 0;
+ }
+
+ // css3-background specifies this algorithm for reducing
+ // corner radii when they are too big.
+ bool haveRadius = false;
+ double ratio = 1.0f;
+ NS_FOR_CSS_SIDES(side) {
+ uint32_t hc1 = NS_SIDE_TO_HALF_CORNER(side, false, true);
+ uint32_t hc2 = NS_SIDE_TO_HALF_CORNER(side, true, true);
+ nscoord length =
+ NS_SIDE_IS_VERTICAL(side) ? aBorderArea.height : aBorderArea.width;
+ nscoord sum = aRadii[hc1] + aRadii[hc2];
+ if (sum)
+ haveRadius = true;
+
+ // avoid floating point division in the normal case
+ if (length < sum)
+ ratio = std::min(ratio, double(length)/sum);
+ }
+ if (ratio < 1.0) {
+ NS_FOR_CSS_HALF_CORNERS(corner) {
+ aRadii[corner] *= ratio;
+ }
+ }
+
+ return haveRadius;
+}
+
+/* static */ void
+nsIFrame::InsetBorderRadii(nscoord aRadii[8], const nsMargin &aOffsets)
+{
+ NS_FOR_CSS_SIDES(side) {
+ nscoord offset = aOffsets.Side(side);
+ uint32_t hc1 = NS_SIDE_TO_HALF_CORNER(side, false, false);
+ uint32_t hc2 = NS_SIDE_TO_HALF_CORNER(side, true, false);
+ aRadii[hc1] = std::max(0, aRadii[hc1] - offset);
+ aRadii[hc2] = std::max(0, aRadii[hc2] - offset);
+ }
+}
+
+/* static */ void
+nsIFrame::OutsetBorderRadii(nscoord aRadii[8], const nsMargin &aOffsets)
+{
+ NS_FOR_CSS_SIDES(side) {
+ nscoord offset = aOffsets.Side(side);
+ uint32_t hc1 = NS_SIDE_TO_HALF_CORNER(side, false, false);
+ uint32_t hc2 = NS_SIDE_TO_HALF_CORNER(side, true, false);
+ if (aRadii[hc1] > 0)
+ aRadii[hc1] += offset;
+ if (aRadii[hc2] > 0)
+ aRadii[hc2] += offset;
+ }
+}
+
+/* virtual */ bool
+nsIFrame::GetBorderRadii(const nsSize& aFrameSize, const nsSize& aBorderArea,
+ Sides aSkipSides, nscoord aRadii[8]) const
+{
+ if (IsThemed()) {
+ // When we're themed, the native theme code draws the border and
+ // background, and therefore it doesn't make sense to tell other
+ // code that's interested in border-radius that we have any radii.
+ //
+ // In an ideal world, we might have a way for the them to tell us an
+ // border radius, but since we don't, we're better off assuming
+ // zero.
+ NS_FOR_CSS_HALF_CORNERS(corner) {
+ aRadii[corner] = 0;
+ }
+ return false;
+ }
+ return ComputeBorderRadii(StyleBorder()->mBorderRadius,
+ aFrameSize, aBorderArea,
+ aSkipSides, aRadii);
+}
+
+bool
+nsIFrame::GetBorderRadii(nscoord aRadii[8]) const
+{
+ nsSize sz = GetSize();
+ return GetBorderRadii(sz, sz, GetSkipSides(), aRadii);
+}
+
+bool
+nsIFrame::GetPaddingBoxBorderRadii(nscoord aRadii[8]) const
+{
+ if (!GetBorderRadii(aRadii))
+ return false;
+ InsetBorderRadii(aRadii, GetUsedBorder());
+ NS_FOR_CSS_HALF_CORNERS(corner) {
+ if (aRadii[corner])
+ return true;
+ }
+ return false;
+}
+
+bool
+nsIFrame::GetContentBoxBorderRadii(nscoord aRadii[8]) const
+{
+ if (!GetBorderRadii(aRadii))
+ return false;
+ InsetBorderRadii(aRadii, GetUsedBorderAndPadding());
+ NS_FOR_CSS_HALF_CORNERS(corner) {
+ if (aRadii[corner])
+ return true;
+ }
+ return false;
+}
+
+nsStyleContext*
+nsFrame::GetAdditionalStyleContext(int32_t aIndex) const
+{
+ NS_PRECONDITION(aIndex >= 0, "invalid index number");
+ return nullptr;
+}
+
+void
+nsFrame::SetAdditionalStyleContext(int32_t aIndex,
+ nsStyleContext* aStyleContext)
+{
+ NS_PRECONDITION(aIndex >= 0, "invalid index number");
+}
+
+nscoord
+nsFrame::GetLogicalBaseline(WritingMode aWritingMode) const
+{
+ NS_ASSERTION(!NS_SUBTREE_DIRTY(this),
+ "frame must not be dirty");
+ // Baseline for inverted line content is the top (block-start) margin edge,
+ // as the frame is in effect "flipped" for alignment purposes.
+ if (aWritingMode.IsLineInverted()) {
+ return -GetLogicalUsedMargin(aWritingMode).BStart(aWritingMode);
+ }
+ // Otherwise, the bottom margin edge, per CSS2.1's definition of the
+ // 'baseline' value of 'vertical-align'.
+ return BSize(aWritingMode) +
+ GetLogicalUsedMargin(aWritingMode).BEnd(aWritingMode);
+}
+
+const nsFrameList&
+nsFrame::GetChildList(ChildListID aListID) const
+{
+ if (IsAbsoluteContainer() &&
+ aListID == GetAbsoluteListID()) {
+ return GetAbsoluteContainingBlock()->GetChildList();
+ } else {
+ return nsFrameList::EmptyList();
+ }
+}
+
+void
+nsFrame::GetChildLists(nsTArray<ChildList>* aLists) const
+{
+ if (IsAbsoluteContainer()) {
+ nsFrameList absoluteList = GetAbsoluteContainingBlock()->GetChildList();
+ absoluteList.AppendIfNonempty(aLists, GetAbsoluteListID());
+ }
+}
+
+void
+nsIFrame::GetCrossDocChildLists(nsTArray<ChildList>* aLists)
+{
+ nsSubDocumentFrame* subdocumentFrame = do_QueryFrame(this);
+ if (subdocumentFrame) {
+ // Descend into the subdocument
+ nsIFrame* root = subdocumentFrame->GetSubdocumentRootFrame();
+ if (root) {
+ aLists->AppendElement(nsIFrame::ChildList(
+ nsFrameList(root, nsLayoutUtils::GetLastSibling(root)),
+ nsIFrame::kPrincipalList));
+ }
+ }
+
+ GetChildLists(aLists);
+}
+
+Visibility
+nsIFrame::GetVisibility() const
+{
+ if (!(GetStateBits() & NS_FRAME_VISIBILITY_IS_TRACKED)) {
+ return Visibility::UNTRACKED;
+ }
+
+ bool isSet = false;
+ FrameProperties props = Properties();
+ uint32_t visibleCount = props.Get(VisibilityStateProperty(), &isSet);
+
+ MOZ_ASSERT(isSet, "Should have a VisibilityStateProperty value "
+ "if NS_FRAME_VISIBILITY_IS_TRACKED is set");
+
+ return visibleCount > 0
+ ? Visibility::APPROXIMATELY_VISIBLE
+ : Visibility::APPROXIMATELY_NONVISIBLE;
+}
+
+void
+nsIFrame::UpdateVisibilitySynchronously()
+{
+ nsIPresShell* presShell = PresContext()->PresShell();
+ if (!presShell) {
+ return;
+ }
+
+ if (presShell->AssumeAllFramesVisible()) {
+ presShell->EnsureFrameInApproximatelyVisibleList(this);
+ return;
+ }
+
+ bool visible = true;
+ nsIFrame* f = GetParent();
+ nsRect rect = GetRectRelativeToSelf();
+ nsIFrame* rectFrame = this;
+ while (f) {
+ nsIScrollableFrame* sf = do_QueryFrame(f);
+ if (sf) {
+ nsRect transformedRect =
+ nsLayoutUtils::TransformFrameRectToAncestor(rectFrame, rect, f);
+ if (!sf->IsRectNearlyVisible(transformedRect)) {
+ visible = false;
+ break;
+ }
+
+ // In this code we're trying to synchronously update *approximate*
+ // visibility. (In the future we may update precise visibility here as
+ // well, which is why the method name does not contain 'approximate'.) The
+ // IsRectNearlyVisible() check above tells us that the rect we're checking
+ // is approximately visible within the scrollframe, but we still need to
+ // ensure that, even if it was scrolled into view, it'd be visible when we
+ // consider the rest of the document. To do that, we move transformedRect
+ // to be contained in the scrollport as best we can (it might not fit) to
+ // pretend that it was scrolled into view.
+ rect = transformedRect.MoveInsideAndClamp(sf->GetScrollPortRect());
+ rectFrame = f;
+ }
+ nsIFrame* parent = f->GetParent();
+ if (!parent) {
+ parent = nsLayoutUtils::GetCrossDocParentFrame(f);
+ if (parent && parent->PresContext()->IsChrome()) {
+ break;
+ }
+ }
+ f = parent;
+ }
+
+ if (visible) {
+ presShell->EnsureFrameInApproximatelyVisibleList(this);
+ } else {
+ presShell->RemoveFrameFromApproximatelyVisibleList(this);
+ }
+}
+
+void
+nsIFrame::EnableVisibilityTracking()
+{
+ if (GetStateBits() & NS_FRAME_VISIBILITY_IS_TRACKED) {
+ return; // Nothing to do.
+ }
+
+ FrameProperties props = Properties();
+ MOZ_ASSERT(!props.Has(VisibilityStateProperty()),
+ "Shouldn't have a VisibilityStateProperty value "
+ "if NS_FRAME_VISIBILITY_IS_TRACKED is not set");
+
+ // Add the state bit so we know to track visibility for this frame, and
+ // initialize the frame property.
+ AddStateBits(NS_FRAME_VISIBILITY_IS_TRACKED);
+ props.Set(VisibilityStateProperty(), 0);
+
+ nsIPresShell* presShell = PresContext()->PresShell();
+ if (!presShell) {
+ return;
+ }
+
+ // Schedule a visibility update. This method will virtually always be called
+ // when layout has changed anyway, so it's very unlikely that any additional
+ // visibility updates will be triggered by this, but this way we guarantee
+ // that if this frame is currently visible we'll eventually find out.
+ presShell->ScheduleApproximateFrameVisibilityUpdateSoon();
+}
+
+void
+nsIFrame::DisableVisibilityTracking()
+{
+ if (!(GetStateBits() & NS_FRAME_VISIBILITY_IS_TRACKED)) {
+ return; // Nothing to do.
+ }
+
+ bool isSet = false;
+ FrameProperties props = Properties();
+ uint32_t visibleCount = props.Remove(VisibilityStateProperty(), &isSet);
+
+ MOZ_ASSERT(isSet, "Should have a VisibilityStateProperty value "
+ "if NS_FRAME_VISIBILITY_IS_TRACKED is set");
+
+ RemoveStateBits(NS_FRAME_VISIBILITY_IS_TRACKED);
+
+ if (visibleCount == 0) {
+ return; // We were nonvisible.
+ }
+
+ // We were visible, so send an OnVisibilityChange() notification.
+ OnVisibilityChange(Visibility::APPROXIMATELY_NONVISIBLE);
+}
+
+void
+nsIFrame::DecApproximateVisibleCount(Maybe<OnNonvisible> aNonvisibleAction
+ /* = Nothing() */)
+{
+ MOZ_ASSERT(GetStateBits() & NS_FRAME_VISIBILITY_IS_TRACKED);
+
+ bool isSet = false;
+ FrameProperties props = Properties();
+ uint32_t visibleCount = props.Get(VisibilityStateProperty(), &isSet);
+
+ MOZ_ASSERT(isSet, "Should have a VisibilityStateProperty value "
+ "if NS_FRAME_VISIBILITY_IS_TRACKED is set");
+ MOZ_ASSERT(visibleCount > 0, "Frame is already nonvisible and we're "
+ "decrementing its visible count?");
+
+ visibleCount--;
+ props.Set(VisibilityStateProperty(), visibleCount);
+ if (visibleCount > 0) {
+ return;
+ }
+
+ // We just became nonvisible, so send an OnVisibilityChange() notification.
+ OnVisibilityChange(Visibility::APPROXIMATELY_NONVISIBLE, aNonvisibleAction);
+}
+
+void
+nsIFrame::IncApproximateVisibleCount()
+{
+ MOZ_ASSERT(GetStateBits() & NS_FRAME_VISIBILITY_IS_TRACKED);
+
+ bool isSet = false;
+ FrameProperties props = Properties();
+ uint32_t visibleCount = props.Get(VisibilityStateProperty(), &isSet);
+
+ MOZ_ASSERT(isSet, "Should have a VisibilityStateProperty value "
+ "if NS_FRAME_VISIBILITY_IS_TRACKED is set");
+
+ visibleCount++;
+ props.Set(VisibilityStateProperty(), visibleCount);
+ if (visibleCount > 1) {
+ return;
+ }
+
+ // We just became visible, so send an OnVisibilityChange() notification.
+ OnVisibilityChange(Visibility::APPROXIMATELY_VISIBLE);
+}
+
+void
+nsIFrame::OnVisibilityChange(Visibility aNewVisibility,
+ Maybe<OnNonvisible> aNonvisibleAction
+ /* = Nothing() */)
+{
+ // XXX(seth): In bug 1218990 we'll implement visibility tracking for CSS
+ // images here.
+}
+
+static nsIFrame*
+GetActiveSelectionFrame(nsPresContext* aPresContext, nsIFrame* aFrame)
+{
+ nsIContent* capturingContent = nsIPresShell::GetCapturingContent();
+ if (capturingContent) {
+ nsIFrame* activeFrame = aPresContext->GetPrimaryFrameFor(capturingContent);
+ return activeFrame ? activeFrame : aFrame;
+ }
+
+ return aFrame;
+}
+
+int16_t
+nsFrame::DisplaySelection(nsPresContext* aPresContext, bool isOkToTurnOn)
+{
+ int16_t selType = nsISelectionController::SELECTION_OFF;
+
+ nsCOMPtr<nsISelectionController> selCon;
+ nsresult result = GetSelectionController(aPresContext, getter_AddRefs(selCon));
+ if (NS_SUCCEEDED(result) && selCon) {
+ result = selCon->GetDisplaySelection(&selType);
+ if (NS_SUCCEEDED(result) && (selType != nsISelectionController::SELECTION_OFF)) {
+ // Check whether style allows selection.
+ bool selectable;
+ IsSelectable(&selectable, nullptr);
+ if (!selectable) {
+ selType = nsISelectionController::SELECTION_OFF;
+ isOkToTurnOn = false;
+ }
+ }
+ if (isOkToTurnOn && (selType == nsISelectionController::SELECTION_OFF)) {
+ selCon->SetDisplaySelection(nsISelectionController::SELECTION_ON);
+ selType = nsISelectionController::SELECTION_ON;
+ }
+ }
+ return selType;
+}
+
+class nsDisplaySelectionOverlay : public nsDisplayItem {
+public:
+ nsDisplaySelectionOverlay(nsDisplayListBuilder* aBuilder,
+ nsFrame* aFrame, int16_t aSelectionValue)
+ : nsDisplayItem(aBuilder, aFrame), mSelectionValue(aSelectionValue) {
+ MOZ_COUNT_CTOR(nsDisplaySelectionOverlay);
+ }
+#ifdef NS_BUILD_REFCNT_LOGGING
+ virtual ~nsDisplaySelectionOverlay() {
+ MOZ_COUNT_DTOR(nsDisplaySelectionOverlay);
+ }
+#endif
+
+ virtual void Paint(nsDisplayListBuilder* aBuilder,
+ nsRenderingContext* aCtx) override;
+ NS_DISPLAY_DECL_NAME("SelectionOverlay", TYPE_SELECTION_OVERLAY)
+private:
+ int16_t mSelectionValue;
+};
+
+void nsDisplaySelectionOverlay::Paint(nsDisplayListBuilder* aBuilder,
+ nsRenderingContext* aCtx)
+{
+ DrawTarget& aDrawTarget = *aCtx->GetDrawTarget();
+
+ LookAndFeel::ColorID colorID;
+ if (mSelectionValue == nsISelectionController::SELECTION_ON) {
+ colorID = LookAndFeel::eColorID_TextSelectBackground;
+ } else if (mSelectionValue == nsISelectionController::SELECTION_ATTENTION) {
+ colorID = LookAndFeel::eColorID_TextSelectBackgroundAttention;
+ } else {
+ colorID = LookAndFeel::eColorID_TextSelectBackgroundDisabled;
+ }
+
+ Color c = Color::FromABGR(LookAndFeel::GetColor(colorID, NS_RGB(255, 255, 255)));
+ c.a = .5;
+ ColorPattern color(ToDeviceColor(c));
+
+ nsIntRect pxRect =
+ mVisibleRect.ToOutsidePixels(mFrame->PresContext()->AppUnitsPerDevPixel());
+ Rect rect(pxRect.x, pxRect.y, pxRect.width, pxRect.height);
+ MaybeSnapToDevicePixels(rect, aDrawTarget, true);
+
+ aDrawTarget.FillRect(rect, color);
+}
+
+/********************************************************
+* Refreshes each content's frame
+*********************************************************/
+
+void
+nsFrame::DisplaySelectionOverlay(nsDisplayListBuilder* aBuilder,
+ nsDisplayList* aList,
+ uint16_t aContentType)
+{
+ if (!IsSelected() || !IsVisibleForPainting(aBuilder))
+ return;
+
+ nsPresContext* presContext = PresContext();
+ nsIPresShell *shell = presContext->PresShell();
+ if (!shell)
+ return;
+
+ int16_t displaySelection = shell->GetSelectionFlags();
+ if (!(displaySelection & aContentType))
+ return;
+
+ const nsFrameSelection* frameSelection = GetConstFrameSelection();
+ int16_t selectionValue = frameSelection->GetDisplaySelection();
+
+ if (selectionValue <= nsISelectionController::SELECTION_HIDDEN)
+ return; // selection is hidden or off
+
+ nsIContent *newContent = mContent->GetParent();
+
+ //check to see if we are anonymous content
+ int32_t offset = 0;
+ if (newContent) {
+ // XXXbz there has GOT to be a better way of determining this!
+ offset = newContent->IndexOf(mContent);
+ }
+
+ SelectionDetails *details;
+ //look up to see what selection(s) are on this frame
+ details = frameSelection->LookUpSelection(newContent, offset, 1, false);
+ if (!details)
+ return;
+
+ bool normal = false;
+ while (details) {
+ if (details->mSelectionType == SelectionType::eNormal) {
+ normal = true;
+ }
+ SelectionDetails *next = details->mNext;
+ delete details;
+ details = next;
+ }
+
+ if (!normal && aContentType == nsISelectionDisplay::DISPLAY_IMAGES) {
+ // Don't overlay an image if it's not in the primary selection.
+ return;
+ }
+
+ aList->AppendNewToTop(new (aBuilder)
+ nsDisplaySelectionOverlay(aBuilder, this, selectionValue));
+}
+
+void
+nsFrame::DisplayOutlineUnconditional(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists)
+{
+ if (StyleOutline()->mOutlineStyle == NS_STYLE_BORDER_STYLE_NONE) {
+ return;
+ }
+
+ aLists.Outlines()->AppendNewToTop(
+ new (aBuilder) nsDisplayOutline(aBuilder, this));
+}
+
+void
+nsFrame::DisplayOutline(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists)
+{
+ if (!IsVisibleForPainting(aBuilder))
+ return;
+
+ DisplayOutlineUnconditional(aBuilder, aLists);
+}
+
+void
+nsIFrame::DisplayCaret(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect, nsDisplayList* aList)
+{
+ if (!IsVisibleForPainting(aBuilder))
+ return;
+
+ aList->AppendNewToTop(new (aBuilder) nsDisplayCaret(aBuilder, this));
+}
+
+nscolor
+nsIFrame::GetCaretColorAt(int32_t aOffset)
+{
+ // Use text color.
+ return StyleColor()->mColor;
+}
+
+bool
+nsFrame::DisplayBackgroundUnconditional(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists,
+ bool aForceBackground)
+{
+ // Here we don't try to detect background propagation. Frames that might
+ // receive a propagated background should just set aForceBackground to
+ // true.
+ if (aBuilder->IsForEventDelivery() || aForceBackground ||
+ !StyleBackground()->IsTransparent() || StyleDisplay()->mAppearance) {
+ return nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
+ aBuilder, this, GetRectRelativeToSelf(), aLists.BorderBackground());
+ }
+ return false;
+}
+
+void
+nsFrame::DisplayBorderBackgroundOutline(nsDisplayListBuilder* aBuilder,
+ const nsDisplayListSet& aLists,
+ bool aForceBackground)
+{
+ // The visibility check belongs here since child elements have the
+ // opportunity to override the visibility property and display even if
+ // their parent is hidden.
+ if (!IsVisibleForPainting(aBuilder)) {
+ return;
+ }
+
+ nsCSSShadowArray* shadows = StyleEffects()->mBoxShadow;
+ if (shadows && shadows->HasShadowWithInset(false)) {
+ aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
+ nsDisplayBoxShadowOuter(aBuilder, this));
+ }
+
+ bool bgIsThemed = DisplayBackgroundUnconditional(aBuilder, aLists,
+ aForceBackground);
+
+ if (shadows && shadows->HasShadowWithInset(true)) {
+ aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
+ nsDisplayBoxShadowInner(aBuilder, this));
+ }
+
+ // If there's a themed background, we should not create a border item.
+ // It won't be rendered.
+ if (!bgIsThemed && StyleBorder()->HasBorder()) {
+ aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
+ nsDisplayBorder(aBuilder, this));
+ }
+
+ DisplayOutlineUnconditional(aBuilder, aLists);
+}
+
+inline static bool IsSVGContentWithCSSClip(const nsIFrame *aFrame)
+{
+ // The CSS spec says that the 'clip' property only applies to absolutely
+ // positioned elements, whereas the SVG spec says that it applies to SVG
+ // elements regardless of the value of the 'position' property. Here we obey
+ // the CSS spec for outer-<svg> (since that's what we generally do), but
+ // obey the SVG spec for other SVG elements to which 'clip' applies.
+ return (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) &&
+ aFrame->GetContent()->IsAnyOfSVGElements(nsGkAtoms::svg,
+ nsGkAtoms::foreignObject);
+}
+
+Maybe<nsRect>
+nsIFrame::GetClipPropClipRect(const nsStyleDisplay* aDisp,
+ const nsStyleEffects* aEffects,
+ const nsSize& aSize) const
+{
+ if (!(aEffects->mClipFlags & NS_STYLE_CLIP_RECT) ||
+ !(aDisp->IsAbsolutelyPositioned(this) || IsSVGContentWithCSSClip(this))) {
+ return Nothing();
+ }
+
+ nsRect rect = aEffects->mClip;
+ if (MOZ_LIKELY(StyleBorder()->mBoxDecorationBreak ==
+ StyleBoxDecorationBreak::Slice)) {
+ // The clip applies to the joined boxes so it's relative the first
+ // continuation.
+ nscoord y = 0;
+ for (nsIFrame* f = GetPrevContinuation(); f; f = f->GetPrevContinuation()) {
+ y += f->GetRect().height;
+ }
+ rect.MoveBy(nsPoint(0, -y));
+ }
+
+ if (NS_STYLE_CLIP_RIGHT_AUTO & aEffects->mClipFlags) {
+ rect.width = aSize.width - rect.x;
+ }
+ if (NS_STYLE_CLIP_BOTTOM_AUTO & aEffects->mClipFlags) {
+ rect.height = aSize.height - rect.y;
+ }
+ return Some(rect);
+}
+
+/**
+ * If the CSS 'overflow' property applies to this frame, and is not
+ * handled by constructing a dedicated nsHTML/XULScrollFrame, set up clipping
+ * for that overflow in aBuilder->ClipState() to clip all containing-block
+ * descendants.
+ */
+static void
+ApplyOverflowClipping(nsDisplayListBuilder* aBuilder,
+ const nsIFrame* aFrame,
+ const nsStyleDisplay* aDisp,
+ DisplayListClipState::AutoClipMultiple& aClipState)
+{
+ // Only -moz-hidden-unscrollable is handled here (and 'hidden' for table
+ // frames, and any non-visible value for blocks in a paginated context).
+ // We allow -moz-hidden-unscrollable to apply to any kind of frame. This
+ // is required by comboboxes which make their display text (an inline frame)
+ // have clipping.
+ if (!nsFrame::ShouldApplyOverflowClipping(aFrame, aDisp)) {
+ return;
+ }
+ nsRect clipRect;
+ bool haveRadii = false;
+ nscoord radii[8];
+ if (aFrame->StyleDisplay()->mOverflowClipBox ==
+ NS_STYLE_OVERFLOW_CLIP_BOX_PADDING_BOX) {
+ clipRect = aFrame->GetPaddingRectRelativeToSelf() +
+ aBuilder->ToReferenceFrame(aFrame);
+ haveRadii = aFrame->GetPaddingBoxBorderRadii(radii);
+ } else {
+ clipRect = aFrame->GetContentRectRelativeToSelf() +
+ aBuilder->ToReferenceFrame(aFrame);
+ // XXX border-radius
+ }
+ aClipState.ClipContainingBlockDescendantsExtra(clipRect, haveRadii ? radii : nullptr);
+}
+
+#ifdef DEBUG
+static void PaintDebugBorder(nsIFrame* aFrame, DrawTarget* aDrawTarget,
+ const nsRect& aDirtyRect, nsPoint aPt)
+{
+ nsRect r(aPt, aFrame->GetSize());
+ int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
+ Color blueOrRed(aFrame->HasView() ? Color(0.f, 0.f, 1.f, 1.f) :
+ Color(1.f, 0.f, 0.f, 1.f));
+ aDrawTarget->StrokeRect(NSRectToRect(r, appUnitsPerDevPixel),
+ ColorPattern(ToDeviceColor(blueOrRed)));
+}
+
+static void PaintEventTargetBorder(nsIFrame* aFrame, DrawTarget* aDrawTarget,
+ const nsRect& aDirtyRect, nsPoint aPt)
+{
+ nsRect r(aPt, aFrame->GetSize());
+ int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
+ ColorPattern purple(ToDeviceColor(Color(.5f, 0.f, .5f, 1.f)));
+ aDrawTarget->StrokeRect(NSRectToRect(r, appUnitsPerDevPixel), purple);
+}
+
+static void
+DisplayDebugBorders(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
+ const nsDisplayListSet& aLists) {
+ // Draw a border around the child
+ // REVIEW: From nsContainerFrame::PaintChild
+ if (nsFrame::GetShowFrameBorders() && !aFrame->GetRect().IsEmpty()) {
+ aLists.Outlines()->AppendNewToTop(new (aBuilder)
+ nsDisplayGeneric(aBuilder, aFrame, PaintDebugBorder, "DebugBorder",
+ nsDisplayItem::TYPE_DEBUG_BORDER));
+ }
+ // Draw a border around the current event target
+ if (nsFrame::GetShowEventTargetFrameBorder() &&
+ aFrame->PresContext()->PresShell()->GetDrawEventTargetFrame() == aFrame) {
+ aLists.Outlines()->AppendNewToTop(new (aBuilder)
+ nsDisplayGeneric(aBuilder, aFrame, PaintEventTargetBorder, "EventTargetBorder",
+ nsDisplayItem::TYPE_EVENT_TARGET_BORDER));
+ }
+}
+#endif
+
+static bool
+IsScrollFrameActive(nsDisplayListBuilder* aBuilder, nsIScrollableFrame* aScrollableFrame)
+{
+ return aScrollableFrame && aScrollableFrame->IsScrollingActive(aBuilder);
+}
+
+class AutoSaveRestoreContainsBlendMode
+{
+ nsDisplayListBuilder& mBuilder;
+ bool mSavedContainsBlendMode;
+public:
+ explicit AutoSaveRestoreContainsBlendMode(nsDisplayListBuilder& aBuilder)
+ : mBuilder(aBuilder)
+ , mSavedContainsBlendMode(aBuilder.ContainsBlendMode())
+ { }
+
+ ~AutoSaveRestoreContainsBlendMode() {
+ mBuilder.SetContainsBlendMode(mSavedContainsBlendMode);
+ }
+};
+
+static void
+CheckForApzAwareEventHandlers(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
+{
+ nsIContent* content = aFrame->GetContent();
+ if (!content) {
+ return;
+ }
+
+ if (content->IsNodeApzAware()) {
+ aBuilder->SetAncestorHasApzAwareEventHandler(true);
+ }
+}
+
+/**
+ * True if aDescendant participates the context aAncestor participating.
+ */
+static bool
+FrameParticipatesIn3DContext(nsIFrame* aAncestor, nsIFrame* aDescendant) {
+ MOZ_ASSERT(aAncestor != aDescendant);
+ MOZ_ASSERT(aAncestor->Extend3DContext());
+ nsIFrame* frame;
+ for (frame = nsLayoutUtils::GetCrossDocParentFrame(aDescendant);
+ frame && aAncestor != frame;
+ frame = nsLayoutUtils::GetCrossDocParentFrame(frame)) {
+ if (!frame->Extend3DContext()) {
+ return false;
+ }
+ }
+ MOZ_ASSERT(frame == aAncestor);
+ return true;
+}
+
+static bool
+ItemParticipatesIn3DContext(nsIFrame* aAncestor, nsDisplayItem* aItem)
+{
+ nsIFrame* transformFrame;
+ if (aItem->GetType() == nsDisplayItem::TYPE_TRANSFORM) {
+ transformFrame = aItem->Frame();
+ } else if (aItem->GetType() == nsDisplayItem::TYPE_PERSPECTIVE) {
+ transformFrame = static_cast<nsDisplayPerspective*>(aItem)->TransformFrame();
+ } else {
+ return false;
+ }
+ if (aAncestor == transformFrame) {
+ return true;
+ }
+ return FrameParticipatesIn3DContext(aAncestor, transformFrame);
+}
+
+static void
+WrapSeparatorTransform(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
+ nsRect& aDirtyRect,
+ nsDisplayList* aSource, nsDisplayList* aTarget,
+ int aIndex) {
+ if (!aSource->IsEmpty()) {
+ nsDisplayTransform *sepIdItem =
+ new (aBuilder) nsDisplayTransform(aBuilder, aFrame, aSource,
+ aDirtyRect, Matrix4x4(), aIndex);
+ sepIdItem->SetNoExtendContext();
+ aTarget->AppendToTop(sepIdItem);
+ }
+}
+
+void
+nsIFrame::BuildDisplayListForStackingContext(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect,
+ nsDisplayList* aList) {
+ if (GetStateBits() & NS_FRAME_TOO_DEEP_IN_FRAME_TREE)
+ return;
+
+ // Replaced elements have their visibility handled here, because
+ // they're visually atomic
+ if (IsFrameOfType(eReplaced) && !IsVisibleForPainting(aBuilder))
+ return;
+
+ const nsStyleDisplay* disp = StyleDisplay();
+ const nsStyleEffects* effects = StyleEffects();
+ // We can stop right away if this is a zero-opacity stacking context and
+ // we're painting, and we're not animating opacity. Don't do this
+ // if we're going to compute plugin geometry, since opacity-0 plugins
+ // need to have display items built for them.
+ bool needEventRegions =
+ aBuilder->IsBuildingLayerEventRegions() &&
+ StyleUserInterface()->GetEffectivePointerEvents(this) !=
+ NS_STYLE_POINTER_EVENTS_NONE;
+ bool opacityItemForEventsAndPluginsOnly = false;
+ if (effects->mOpacity == 0.0 && aBuilder->IsForPainting() &&
+ !(disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_OPACITY) &&
+ !nsLayoutUtils::HasAnimationOfProperty(this, eCSSProperty_opacity)) {
+ if (needEventRegions ||
+ aBuilder->WillComputePluginGeometry()) {
+ opacityItemForEventsAndPluginsOnly = true;
+ } else {
+ return;
+ }
+ }
+
+ if (disp->mWillChangeBitField != 0) {
+ aBuilder->AddToWillChangeBudget(this, GetSize());
+ }
+
+ bool extend3DContext = Extend3DContext();
+ Maybe<nsDisplayListBuilder::AutoPreserves3DContext> autoPreserves3DContext;
+ if (extend3DContext && !Combines3DTransformWithAncestors()) {
+ // Start a new preserves3d context to keep informations on
+ // nsDisplayListBuilder.
+ autoPreserves3DContext.emplace(aBuilder);
+ // Save dirty rect on the builder to avoid being distorted for
+ // multiple transforms along the chain.
+ aBuilder->SetPreserves3DDirtyRect(aDirtyRect);
+ }
+
+ // For preserves3d, use the dirty rect already installed on the
+ // builder, since aDirtyRect maybe distorted for transforms along
+ // the chain.
+ nsRect dirtyRect = aDirtyRect;
+
+ bool inTransform = aBuilder->IsInTransform();
+ bool isTransformed = IsTransformed();
+ bool hasPerspective = HasPerspective();
+ // reset blend mode so we can keep track if this stacking context needs have
+ // a nsDisplayBlendContainer. Set the blend mode back when the routine exits
+ // so we keep track if the parent stacking context needs a container too.
+ AutoSaveRestoreContainsBlendMode autoRestoreBlendMode(*aBuilder);
+ aBuilder->SetContainsBlendMode(false);
+
+ nsRect dirtyRectOutsideTransform = dirtyRect;
+ if (isTransformed) {
+ const nsRect overflow = GetVisualOverflowRectRelativeToSelf();
+ if (nsDisplayTransform::ShouldPrerenderTransformedContent(aBuilder,
+ this)) {
+ dirtyRect = overflow;
+ } else {
+ if (overflow.IsEmpty() && !extend3DContext) {
+ return;
+ }
+
+ // If we're in preserve-3d then grab the dirty rect that was given to the root
+ // and transform using the combined transform.
+ if (Combines3DTransformWithAncestors()) {
+ dirtyRect = aBuilder->GetPreserves3DDirtyRect(this);
+ }
+
+ nsRect untransformedDirtyRect;
+ if (nsDisplayTransform::UntransformRect(dirtyRect, overflow, this,
+ &untransformedDirtyRect)) {
+ dirtyRect = untransformedDirtyRect;
+ } else {
+ NS_WARNING("Unable to untransform dirty rect!");
+ // This should only happen if the transform is singular, in which case nothing is visible anyway
+ dirtyRect.SetEmpty();
+ }
+ }
+ inTransform = true;
+ }
+ bool usingFilter = StyleEffects()->HasFilters();
+ bool usingMask = nsSVGIntegrationUtils::UsingMaskOrClipPathForFrame(this);
+ bool usingSVGEffects = usingFilter || usingMask;
+
+ nsRect dirtyRectOutsideSVGEffects = dirtyRect;
+ nsDisplayList hoistedScrollInfoItemsStorage;
+ if (usingSVGEffects) {
+ dirtyRect =
+ nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(this, dirtyRect);
+ aBuilder->EnterSVGEffectsContents(&hoistedScrollInfoItemsStorage);
+ }
+
+ // We build an opacity item if it's not going to be drawn by SVG content, or
+ // SVG effects. SVG effects won't handle the opacity if we want an active
+ // layer (for async animations), see
+ // nsSVGIntegrationsUtils::PaintMaskAndClipPath or
+ // nsSVGIntegrationsUtils::PaintFilter.
+ bool useOpacity = HasVisualOpacity() && !nsSVGUtils::CanOptimizeOpacity(this) &&
+ (!usingSVGEffects || nsDisplayOpacity::NeedsActiveLayer(aBuilder, this));
+ bool useBlendMode = effects->mMixBlendMode != NS_STYLE_BLEND_NORMAL;
+ bool useStickyPosition = disp->mPosition == NS_STYLE_POSITION_STICKY &&
+ IsScrollFrameActive(aBuilder,
+ nsLayoutUtils::GetNearestScrollableFrame(GetParent(),
+ nsLayoutUtils::SCROLLABLE_SAME_DOC |
+ nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN));
+ bool useFixedPosition = nsLayoutUtils::IsFixedPosFrameInDisplayPort(this);
+
+ nsDisplayListBuilder::AutoBuildingDisplayList
+ buildingDisplayList(aBuilder, this, dirtyRect, true);
+
+ // Depending on the effects that are applied to this frame, we can create
+ // multiple container display items and wrap them around our contents.
+ // This enum lists all the potential container display items, in the order
+ // outside to inside.
+ enum class ContainerItemType : uint8_t {
+ eNone = 0,
+ eOwnLayerIfNeeded,
+ eBlendMode,
+ eFixedPosition,
+ eStickyPosition,
+ eOwnLayerForTransformWithRoundedClip,
+ ePerspective,
+ eTransform,
+ eSeparatorTransforms,
+ eOpacity,
+ eFilter,
+ eBlendContainer
+ };
+
+ DisplayListClipState::AutoSaveRestore clipState(aBuilder);
+
+ // If there is a current clip, then depending on the container items we
+ // create, different things can happen to it. Some container items simply
+ // propagate the clip to their children and aren't clipped themselves.
+ // But other container items, especially those that establish a different
+ // geometry for their contents (e.g. transforms), capture the clip on
+ // themselves and unset the clip for their contents. If we create more than
+ // one of those container items, the clip will be captured on the outermost
+ // one and the inner container items will be unclipped.
+ ContainerItemType clipCapturedBy = ContainerItemType::eNone;
+ if (useFixedPosition) {
+ clipCapturedBy = ContainerItemType::eFixedPosition;
+ } else if (useStickyPosition) {
+ clipCapturedBy = ContainerItemType::eStickyPosition;
+ } else if (isTransformed) {
+ if ((hasPerspective || extend3DContext) && clipState.SavedStateHasRoundedCorners()) {
+ // If we're creating an nsDisplayTransform item that is going to combine
+ // its transform with its children (preserve-3d or perspective), then we
+ // can't have an intermediate surface. Mask layers force an intermediate
+ // surface, so if we're going to need both then create a separate
+ // wrapping layer for the mask.
+ clipCapturedBy = ContainerItemType::eOwnLayerForTransformWithRoundedClip;
+ } else if (hasPerspective) {
+ clipCapturedBy = ContainerItemType::ePerspective;
+ } else {
+ clipCapturedBy = ContainerItemType::eTransform;
+ }
+ } else if (usingFilter) {
+ clipCapturedBy = ContainerItemType::eFilter;
+ }
+
+ bool clearClip = false;
+ if (clipCapturedBy != ContainerItemType::eNone) {
+ // We don't need to pass ancestor clipping down to our children;
+ // everything goes inside a display item's child list, and the display
+ // item itself will be clipped.
+ // For transforms we also need to clear ancestor clipping because it's
+ // relative to the wrong display item reference frame anyway.
+ clearClip = true;
+ }
+
+ clipState.EnterStackingContextContents(clearClip);
+
+ nsDisplayListCollection set;
+ {
+ DisplayListClipState::AutoSaveRestore nestedClipState(aBuilder);
+ nsDisplayListBuilder::AutoInTransformSetter
+ inTransformSetter(aBuilder, inTransform);
+ nsDisplayListBuilder::AutoSaveRestorePerspectiveIndex
+ perspectiveIndex(aBuilder, this);
+
+ CheckForApzAwareEventHandlers(aBuilder, this);
+
+ Maybe<nsRect> clipPropClip = GetClipPropClipRect(disp, effects, GetSize());
+ if (clipPropClip) {
+ dirtyRect.IntersectRect(dirtyRect, *clipPropClip);
+ nestedClipState.ClipContentDescendants(
+ *clipPropClip + aBuilder->ToReferenceFrame(this));
+ }
+
+ // extend3DContext also guarantees that applyAbsPosClipping and usingSVGEffects are false
+ // We only modify the preserve-3d rect if we are the top of a preserve-3d heirarchy
+ if (extend3DContext) {
+ // Mark these first so MarkAbsoluteFramesForDisplayList knows if we are
+ // going to be forced to descend into frames.
+ aBuilder->MarkPreserve3DFramesForDisplayList(this);
+ }
+
+ MarkAbsoluteFramesForDisplayList(aBuilder, dirtyRect);
+
+ nsDisplayLayerEventRegions* eventRegions = nullptr;
+ if (aBuilder->IsBuildingLayerEventRegions()) {
+ eventRegions = new (aBuilder) nsDisplayLayerEventRegions(aBuilder, this);
+ eventRegions->AddFrame(aBuilder, this);
+ aBuilder->SetLayerEventRegions(eventRegions);
+ }
+ aBuilder->AdjustWindowDraggingRegion(this);
+ BuildDisplayList(aBuilder, dirtyRect, set);
+ if (eventRegions) {
+ // If the event regions item ended up empty, throw it away rather than
+ // adding it to the display list.
+ if (!eventRegions->IsEmpty()) {
+ set.BorderBackground()->AppendToBottom(eventRegions);
+ } else {
+ aBuilder->SetLayerEventRegions(nullptr);
+ eventRegions->~nsDisplayLayerEventRegions();
+ eventRegions = nullptr;
+ }
+ }
+ }
+
+ if (aBuilder->IsBackgroundOnly()) {
+ set.BlockBorderBackgrounds()->DeleteAll();
+ set.Floats()->DeleteAll();
+ set.Content()->DeleteAll();
+ set.PositionedDescendants()->DeleteAll();
+ set.Outlines()->DeleteAll();
+ }
+
+ // Sort PositionedDescendants() in CSS 'z-order' order. The list is already
+ // in content document order and SortByZOrder is a stable sort which
+ // guarantees that boxes produced by the same element are placed together
+ // in the sort. Consider a position:relative inline element that breaks
+ // across lines and has absolutely positioned children; all the abs-pos
+ // children should be z-ordered after all the boxes for the position:relative
+ // element itself.
+ set.PositionedDescendants()->SortByZOrder();
+
+ nsDisplayList resultList;
+ // Now follow the rules of http://www.w3.org/TR/CSS21/zindex.html
+ // 1,2: backgrounds and borders
+ resultList.AppendToTop(set.BorderBackground());
+ // 3: negative z-index children.
+ for (;;) {
+ nsDisplayItem* item = set.PositionedDescendants()->GetBottom();
+ if (item && item->ZIndex() < 0) {
+ set.PositionedDescendants()->RemoveBottom();
+ resultList.AppendToTop(item);
+ continue;
+ }
+ break;
+ }
+ // 4: block backgrounds
+ resultList.AppendToTop(set.BlockBorderBackgrounds());
+ // 5: floats
+ resultList.AppendToTop(set.Floats());
+ // 7: general content
+ resultList.AppendToTop(set.Content());
+ // 7.5: outlines, in content tree order. We need to sort by content order
+ // because an element with outline that breaks and has children with outline
+ // might have placed child outline items between its own outline items.
+ // The element's outline items need to all come before any child outline
+ // items.
+ nsIContent* content = GetContent();
+ if (!content) {
+ content = PresContext()->Document()->GetRootElement();
+ }
+ if (content) {
+ set.Outlines()->SortByContentOrder(content);
+ }
+#ifdef DEBUG
+ DisplayDebugBorders(aBuilder, this, set);
+#endif
+ resultList.AppendToTop(set.Outlines());
+ // 8, 9: non-negative z-index children
+ resultList.AppendToTop(set.PositionedDescendants());
+
+ // Get the scroll clip to use for the container items that we create here.
+ // If we cleared the clip, and we create multiple container items, then the
+ // items we create before we restore the clip will have a different scroll
+ // clip from the items we create after we restore the clip.
+ const DisplayItemScrollClip* containerItemScrollClip =
+ aBuilder->ClipState().CurrentAncestorScrollClipForStackingContextContents();
+
+ /* If adding both a nsDisplayBlendContainer and a nsDisplayBlendMode to the
+ * same list, the nsDisplayBlendContainer should be added first. This only
+ * happens when the element creating this stacking context has mix-blend-mode
+ * and also contains a child which has mix-blend-mode.
+ * The nsDisplayBlendContainer must be added to the list first, so it does not
+ * isolate the containing element blending as well.
+ */
+
+ if (aBuilder->ContainsBlendMode()) {
+ DisplayListClipState::AutoSaveRestore blendContainerClipState(aBuilder);
+ blendContainerClipState.Clear();
+ resultList.AppendNewToTop(
+ nsDisplayBlendContainer::CreateForMixBlendMode(aBuilder, this, &resultList,
+ containerItemScrollClip));
+ }
+
+ /* If there are any SVG effects, wrap the list up in an SVG effects item
+ * (which also handles CSS group opacity). Note that we create an SVG effects
+ * item even if resultList is empty, since a filter can produce graphical
+ * output even if the element being filtered wouldn't otherwise do so.
+ */
+ if (usingSVGEffects) {
+ MOZ_ASSERT(usingFilter ||usingMask,
+ "Beside filter & mask/clip-path, what else effect do we have?");
+
+ if (clipCapturedBy == ContainerItemType::eFilter) {
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ }
+ // Revert to the post-filter dirty rect.
+ buildingDisplayList.SetDirtyRect(dirtyRectOutsideSVGEffects);
+
+ // Skip all filter effects while generating glyph mask.
+ if (usingFilter && !aBuilder->IsForGenerateGlyphMask()) {
+ // If we are going to create a mask display item, handle opacity effect
+ // in that mask display item; Otherwise, take care of opacity in this
+ // filter display item.
+ bool handleOpacity = !usingMask && !useOpacity;
+
+ /* List now emptied, so add the new list to the top. */
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayFilter(aBuilder, this, &resultList,
+ handleOpacity));
+ }
+
+ if (usingMask) {
+ DisplayListClipState::AutoSaveRestore maskClipState(aBuilder);
+ maskClipState.Clear();
+ /* List now emptied, so add the new list to the top. */
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayMask(aBuilder, this, &resultList,
+ !useOpacity, containerItemScrollClip));
+ }
+
+ // Also add the hoisted scroll info items. We need those for APZ scrolling
+ // because nsDisplayMask items can't build active layers.
+ aBuilder->ExitSVGEffectsContents();
+ resultList.AppendToTop(&hoistedScrollInfoItemsStorage);
+ }
+
+ /* If the list is non-empty and there is CSS group opacity without SVG
+ * effects, wrap it up in an opacity item.
+ */
+ if (useOpacity && !resultList.IsEmpty()) {
+ // Don't clip nsDisplayOpacity items. We clip their descendants instead.
+ // The clip we would set on an element with opacity would clip
+ // all descendant content, but some should not be clipped.
+ DisplayListClipState::AutoSaveRestore opacityClipState(aBuilder);
+ opacityClipState.Clear();
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayOpacity(aBuilder, this, &resultList,
+ containerItemScrollClip, opacityItemForEventsAndPluginsOnly));
+ }
+
+ /* If we're going to apply a transformation and don't have preserve-3d set, wrap
+ * everything in an nsDisplayTransform. If there's nothing in the list, don't add
+ * anything.
+ *
+ * For the preserve-3d case we want to individually wrap every child in the list with
+ * a separate nsDisplayTransform instead. When the child is already an nsDisplayTransform,
+ * we can skip this step, as the computed transform will already include our own.
+ *
+ * We also traverse into sublists created by nsDisplayWrapList, so that we find all the
+ * correct children.
+ */
+ if (isTransformed && !resultList.IsEmpty() && extend3DContext) {
+ // Install dummy nsDisplayTransform as a leaf containing
+ // descendants not participating this 3D rendering context.
+ nsDisplayList nonparticipants;
+ nsDisplayList participants;
+ int index = 1;
+
+ while (nsDisplayItem* item = resultList.RemoveBottom()) {
+ if (ItemParticipatesIn3DContext(this, item) && !item->GetClip().HasClip()) {
+ // The frame of this item participates the same 3D context.
+ WrapSeparatorTransform(aBuilder, this, dirtyRect,
+ &nonparticipants, &participants, index++);
+ participants.AppendToTop(item);
+ } else {
+ // The frame of the item doesn't participate the current
+ // context, or has no transform.
+ //
+ // For items participating but not transformed, they are add
+ // to nonparticipants to get a separator layer for handling
+ // clips, if there is, on an intermediate surface.
+ // \see ContainerLayer::DefaultComputeEffectiveTransforms().
+ nonparticipants.AppendToTop(item);
+ }
+ }
+ WrapSeparatorTransform(aBuilder, this, dirtyRect,
+ &nonparticipants, &participants, index++);
+ resultList.AppendToTop(&participants);
+ }
+
+ if (isTransformed && !resultList.IsEmpty()) {
+ if (clipCapturedBy == ContainerItemType::eTransform) {
+ // Restore clip state now so nsDisplayTransform is clipped properly.
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ }
+ // Revert to the dirtyrect coming in from the parent, without our transform
+ // taken into account.
+ buildingDisplayList.SetDirtyRect(dirtyRectOutsideTransform);
+ // Revert to the outer reference frame and offset because all display
+ // items we create from now on are outside the transform.
+ nsPoint toOuterReferenceFrame;
+ const nsIFrame* outerReferenceFrame = this;
+ if (this != aBuilder->RootReferenceFrame()) {
+ outerReferenceFrame =
+ aBuilder->FindReferenceFrameFor(GetParent(), &toOuterReferenceFrame);
+ }
+ buildingDisplayList.SetReferenceFrameAndCurrentOffset(outerReferenceFrame,
+ GetOffsetToCrossDoc(outerReferenceFrame));
+
+ bool isFullyVisible =
+ dirtyRectOutsideSVGEffects.Contains(GetVisualOverflowRectRelativeToSelf());
+ nsDisplayTransform *transformItem =
+ new (aBuilder) nsDisplayTransform(aBuilder, this,
+ &resultList, dirtyRect, 0,
+ isFullyVisible);
+ resultList.AppendNewToTop(transformItem);
+
+ if (hasPerspective) {
+ if (clipCapturedBy == ContainerItemType::ePerspective) {
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ }
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayPerspective(
+ aBuilder, this,
+ GetContainingBlock()->GetContent()->GetPrimaryFrame(), &resultList));
+ }
+ }
+
+ if (clipCapturedBy == ContainerItemType::eOwnLayerForTransformWithRoundedClip) {
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayOwnLayer(aBuilder, this, &resultList, 0,
+ mozilla::layers::FrameMetrics::NULL_SCROLL_ID,
+ 0.0f, /* aForceActive = */ false));
+ }
+
+ /* If we have sticky positioning, wrap it in a sticky position item.
+ */
+ if (useFixedPosition) {
+ if (clipCapturedBy == ContainerItemType::eFixedPosition) {
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ }
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayFixedPosition(aBuilder, this, &resultList));
+ } else if (useStickyPosition) {
+ if (clipCapturedBy == ContainerItemType::eStickyPosition) {
+ clipState.ExitStackingContextContents(&containerItemScrollClip);
+ }
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayStickyPosition(aBuilder, this, &resultList));
+ }
+
+ /* If there's blending, wrap up the list in a blend-mode item. Note
+ * that opacity can be applied before blending as the blend color is
+ * not affected by foreground opacity (only background alpha).
+ */
+
+ if (useBlendMode && !resultList.IsEmpty()) {
+ DisplayListClipState::AutoSaveRestore mixBlendClipState(aBuilder);
+ mixBlendClipState.Clear();
+ resultList.AppendNewToTop(
+ new (aBuilder) nsDisplayBlendMode(aBuilder, this, &resultList,
+ effects->mMixBlendMode,
+ containerItemScrollClip));
+ }
+
+ CreateOwnLayerIfNeeded(aBuilder, &resultList);
+
+ aList->AppendToTop(&resultList);
+}
+
+static nsDisplayItem*
+WrapInWrapList(nsDisplayListBuilder* aBuilder,
+ nsIFrame* aFrame, nsDisplayList* aList,
+ const DisplayItemScrollClip* aScrollClip)
+{
+ nsDisplayItem* item = aList->GetBottom();
+ if (!item) {
+ return nullptr;
+ }
+
+ // For perspective items we want to treat the 'frame' as being the transform
+ // frame that created it. This stops the transform frame from wrapping another
+ // nsDisplayWrapList around it (with mismatching reference frames), but still
+ // makes the perspective frame create one (so we have an atomic entry for z-index
+ // sorting).
+ nsIFrame *itemFrame = item->Frame();
+ if (item->GetType() == nsDisplayItem::TYPE_PERSPECTIVE) {
+ itemFrame = static_cast<nsDisplayPerspective*>(item)->TransformFrame();
+ }
+
+ if (item->GetAbove() || itemFrame != aFrame) {
+ return new (aBuilder) nsDisplayWrapList(aBuilder, aFrame, aList, aScrollClip);
+ }
+ aList->RemoveBottom();
+ return item;
+}
+
+void
+nsIFrame::BuildDisplayListForChild(nsDisplayListBuilder* aBuilder,
+ nsIFrame* aChild,
+ const nsRect& aDirtyRect,
+ const nsDisplayListSet& aLists,
+ uint32_t aFlags) {
+ // If painting is restricted to just the background of the top level frame,
+ // then we have nothing to do here.
+ if (aBuilder->IsBackgroundOnly())
+ return;
+
+ if (aBuilder->IsForGenerateGlyphMask() ||
+ aBuilder->IsForPaintingSelectionBG()) {
+ if (nsGkAtoms::textFrame != aChild->GetType() && aChild->IsLeaf()) {
+ return;
+ }
+ }
+
+ nsIFrame* child = aChild;
+ if (child->GetStateBits() & NS_FRAME_TOO_DEEP_IN_FRAME_TREE)
+ return;
+
+ bool isSVG = (child->GetStateBits() & NS_FRAME_SVG_LAYOUT);
+
+ // true if this is a real or pseudo stacking context
+ bool pseudoStackingContext =
+ (aFlags & DISPLAY_CHILD_FORCE_PSEUDO_STACKING_CONTEXT) != 0;
+ if (!isSVG &&
+ (aFlags & DISPLAY_CHILD_INLINE) &&
+ !child->IsFrameOfType(eLineParticipant)) {
+ // child is a non-inline frame in an inline context, i.e.,
+ // it acts like inline-block or inline-table. Therefore it is a
+ // pseudo-stacking-context.
+ pseudoStackingContext = true;
+ }
+
+ // dirty rect in child-relative coordinates
+ nsRect dirty = aDirtyRect - child->GetOffsetTo(this);
+
+ nsIAtom* childType = child->GetType();
+ nsDisplayListBuilder::OutOfFlowDisplayData* savedOutOfFlowData = nullptr;
+ bool isPlaceholder = false;
+ if (childType == nsGkAtoms::placeholderFrame) {
+ isPlaceholder = true;
+ nsPlaceholderFrame* placeholder = static_cast<nsPlaceholderFrame*>(child);
+ child = placeholder->GetOutOfFlowFrame();
+ NS_ASSERTION(child, "No out of flow frame?");
+ // If 'child' is a pushed float then it's owned by a block that's not an
+ // ancestor of the placeholder, and it will be painted by that block and
+ // should not be painted through the placeholder.
+ if (!child || nsLayoutUtils::IsPopup(child) ||
+ (child->GetStateBits() & NS_FRAME_IS_PUSHED_FLOAT))
+ return;
+ MOZ_ASSERT(child->GetStateBits() & NS_FRAME_OUT_OF_FLOW);
+ // If the out-of-flow frame is in the top layer, the viewport frame
+ // will paint it. Skip it here. Note that, only out-of-flow frames
+ // with this property should be skipped, because non-HTML elements
+ // may stop their children from being out-of-flow. Those frames
+ // should still be handled in the normal in-flow path.
+ if (placeholder->GetStateBits() & PLACEHOLDER_FOR_TOPLAYER) {
+ return;
+ }
+ // Make sure that any attempt to use childType below is disappointed. We
+ // could call GetType again but since we don't currently need it, let's
+ // avoid the virtual call.
+ childType = nullptr;
+ // Recheck NS_FRAME_TOO_DEEP_IN_FRAME_TREE
+ if (child->GetStateBits() & NS_FRAME_TOO_DEEP_IN_FRAME_TREE)
+ return;
+ savedOutOfFlowData = nsDisplayListBuilder::GetOutOfFlowData(child);
+ if (savedOutOfFlowData) {
+ dirty = savedOutOfFlowData->mDirtyRect;
+ } else {
+ // The out-of-flow frame did not intersect the dirty area. We may still
+ // need to traverse into it, since it may contain placeholders we need
+ // to enter to reach other out-of-flow frames that are visible.
+ dirty.SetEmpty();
+ }
+ pseudoStackingContext = true;
+ }
+
+ NS_ASSERTION(childType != nsGkAtoms::placeholderFrame,
+ "Should have dealt with placeholders already");
+ if (aBuilder->GetSelectedFramesOnly() &&
+ child->IsLeaf() &&
+ !aChild->IsSelected()) {
+ return;
+ }
+
+ if (aBuilder->GetIncludeAllOutOfFlows() &&
+ (child->GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
+ dirty = child->GetVisualOverflowRect();
+ } else if (!(child->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)) {
+ // No need to descend into child to catch placeholders for visible
+ // positioned stuff. So see if we can short-circuit frame traversal here.
+
+ // We can stop if child's frame subtree's intersection with the
+ // dirty area is empty.
+ // If the child is a scrollframe that we want to ignore, then we need
+ // to descend into it because its scrolled child may intersect the dirty
+ // area even if the scrollframe itself doesn't.
+ // There are cases where the "ignore scroll frame" on the builder is not set
+ // correctly, and so we additionally want to catch cases where the child is
+ // a root scrollframe and we are ignoring scrolling on the viewport.
+ nsIPresShell* shell = PresContext()->PresShell();
+ bool keepDescending = child == aBuilder->GetIgnoreScrollFrame() ||
+ (shell->IgnoringViewportScrolling() && child == shell->GetRootScrollFrame());
+ if (!keepDescending) {
+ nsRect childDirty;
+ if (!childDirty.IntersectRect(dirty, child->GetVisualOverflowRect()))
+ return;
+ // Usually we could set dirty to childDirty now but there's no
+ // benefit, and it can be confusing. It can especially confuse
+ // situations where we're going to ignore a scrollframe's clipping;
+ // we wouldn't want to clip the dirty area to the scrollframe's
+ // bounds in that case.
+ }
+ }
+
+ // XXX need to have inline-block and inline-table set pseudoStackingContext
+
+ const nsStyleDisplay* ourDisp = StyleDisplay();
+ // REVIEW: Taken from nsBoxFrame::Paint
+ // Don't paint our children if the theme object is a leaf.
+ if (IsThemed(ourDisp) &&
+ !PresContext()->GetTheme()->WidgetIsContainer(ourDisp->mAppearance))
+ return;
+
+ // Since we're now sure that we're adding this frame to the display list
+ // (which means we're painting it, modulo occlusion), mark it as visible
+ // within the displayport.
+ if (aBuilder->IsPaintingToWindow() && child->TrackingVisibility()) {
+ child->PresContext()->PresShell()->EnsureFrameInApproximatelyVisibleList(child);
+ }
+
+ // Child is composited if it's transformed, partially transparent, or has
+ // SVG effects or a blend mode..
+ const nsStyleDisplay* disp = child->StyleDisplay();
+ const nsStyleEffects* effects = child->StyleEffects();
+ const nsStylePosition* pos = child->StylePosition();
+ bool isVisuallyAtomic = child->HasOpacity()
+ || child->IsTransformed()
+ // strictly speaking, 'perspective' doesn't require visual atomicity,
+ // but the spec says it acts like the rest of these
+ || disp->mChildPerspective.GetUnit() == eStyleUnit_Coord
+ || effects->mMixBlendMode != NS_STYLE_BLEND_NORMAL
+ || nsSVGIntegrationUtils::UsingEffectsForFrame(child);
+
+ bool isPositioned = disp->IsAbsPosContainingBlock(child);
+ bool isStackingContext =
+ (isPositioned && (disp->IsPositionForcingStackingContext() ||
+ pos->mZIndex.GetUnit() == eStyleUnit_Integer)) ||
+ (disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_STACKING_CONTEXT) ||
+ disp->mIsolation != NS_STYLE_ISOLATION_AUTO ||
+ isVisuallyAtomic || (aFlags & DISPLAY_CHILD_FORCE_STACKING_CONTEXT);
+
+ if (isVisuallyAtomic || isPositioned || (!isSVG && disp->IsFloating(child)) ||
+ ((effects->mClipFlags & NS_STYLE_CLIP_RECT) &&
+ IsSVGContentWithCSSClip(child)) ||
+ disp->mIsolation != NS_STYLE_ISOLATION_AUTO ||
+ (disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_STACKING_CONTEXT) ||
+ (aFlags & DISPLAY_CHILD_FORCE_STACKING_CONTEXT)) {
+ // If you change this, also change IsPseudoStackingContextFromStyle()
+ pseudoStackingContext = true;
+ }
+ NS_ASSERTION(!isStackingContext || pseudoStackingContext,
+ "Stacking contexts must also be pseudo-stacking-contexts");
+
+ nsDisplayListBuilder::AutoBuildingDisplayList
+ buildingForChild(aBuilder, child, dirty, pseudoStackingContext);
+ DisplayListClipState::AutoClipMultiple clipState(aBuilder);
+ CheckForApzAwareEventHandlers(aBuilder, child);
+
+ if (savedOutOfFlowData) {
+ aBuilder->SetBuildingInvisibleItems(false);
+
+ clipState.SetClipForContainingBlockDescendants(
+ &savedOutOfFlowData->mContainingBlockClip);
+ clipState.SetScrollClipForContainingBlockDescendants(aBuilder,
+ savedOutOfFlowData->mContainingBlockScrollClip);
+ } else if (GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO &&
+ isPlaceholder) {
+ NS_ASSERTION(dirty.IsEmpty(), "should have empty dirty rect");
+ // Every item we build from now until we descent into an out of flow that
+ // does have saved out of flow data should be invisible. This state gets
+ // restored when AutoBuildingDisplayList gets out of scope.
+ aBuilder->SetBuildingInvisibleItems(true);
+
+ // If we have nested out-of-flow frames and the outer one isn't visible
+ // then we won't have stored clip data for it. We can just clear the clip
+ // instead since we know we won't render anything, and the inner out-of-flow
+ // frame will setup the correct clip for itself.
+ clipState.SetClipForContainingBlockDescendants(nullptr);
+ clipState.SetScrollClipForContainingBlockDescendants(aBuilder, nullptr);
+ }
+
+ // Setup clipping for the parent's overflow:-moz-hidden-unscrollable,
+ // or overflow:hidden on elements that don't support scrolling (and therefore
+ // don't create nsHTML/XULScrollFrame). This clipping needs to not clip
+ // anything directly rendered by the parent, only the rendering of its
+ // children.
+ // Don't use overflowClip to restrict the dirty rect, since some of the
+ // descendants may not be clipped by it. Even if we end up with unnecessary
+ // display items, they'll be pruned during ComputeVisibility.
+ nsIFrame* parent = child->GetParent();
+ const nsStyleDisplay* parentDisp =
+ parent == this ? ourDisp : parent->StyleDisplay();
+ ApplyOverflowClipping(aBuilder, parent, parentDisp, clipState);
+
+ nsDisplayList list;
+ nsDisplayList extraPositionedDescendants;
+ if (isStackingContext) {
+ if (effects->mMixBlendMode != NS_STYLE_BLEND_NORMAL) {
+ aBuilder->SetContainsBlendMode(true);
+ }
+ // True stacking context.
+ // For stacking contexts, BuildDisplayListForStackingContext handles
+ // clipping and MarkAbsoluteFramesForDisplayList.
+ child->BuildDisplayListForStackingContext(aBuilder, dirty, &list);
+ aBuilder->DisplayCaret(child, dirty, &list);
+ } else {
+ Maybe<nsRect> clipPropClip =
+ child->GetClipPropClipRect(disp, effects, child->GetSize());
+ if (clipPropClip) {
+ dirty.IntersectRect(dirty, *clipPropClip);
+ clipState.ClipContentDescendants(
+ *clipPropClip + aBuilder->ToReferenceFrame(child));
+ }
+
+ child->MarkAbsoluteFramesForDisplayList(aBuilder, dirty);
+
+ if (aBuilder->IsBuildingLayerEventRegions()) {
+ // If this frame has a different animated geometry root than its parent,
+ // make sure we accumulate event regions for its layer.
+ if (buildingForChild.IsAnimatedGeometryRoot() || isPositioned) {
+ nsDisplayLayerEventRegions* eventRegions =
+ new (aBuilder) nsDisplayLayerEventRegions(aBuilder, child);
+ eventRegions->AddFrame(aBuilder, child);
+ aBuilder->SetLayerEventRegions(eventRegions);
+
+ if (isPositioned) {
+ // We need this nsDisplayLayerEventRegions to be sorted with the positioned
+ // elements as positioned elements will be sorted on top of normal elements
+ list.AppendNewToTop(eventRegions);
+ } else {
+ aLists.BorderBackground()->AppendNewToTop(eventRegions);
+ }
+ } else {
+ nsDisplayLayerEventRegions* eventRegions = aBuilder->GetLayerEventRegions();
+ if (eventRegions) {
+ eventRegions->AddFrame(aBuilder, child);
+ }
+ }
+ }
+
+ if (!pseudoStackingContext) {
+ // THIS IS THE COMMON CASE.
+ // Not a pseudo or real stacking context. Do the simple thing and
+ // return early.
+
+ aBuilder->AdjustWindowDraggingRegion(child);
+ child->BuildDisplayList(aBuilder, dirty, aLists);
+ aBuilder->DisplayCaret(child, dirty, aLists.Content());
+#ifdef DEBUG
+ DisplayDebugBorders(aBuilder, child, aLists);
+#endif
+ return;
+ }
+
+ // A pseudo-stacking context (e.g., a positioned element with z-index auto).
+ // We allow positioned descendants of the child to escape to our parent
+ // stacking context's positioned descendant list, because they might be
+ // z-index:non-auto
+ nsDisplayListCollection pseudoStack;
+ aBuilder->AdjustWindowDraggingRegion(child);
+ child->BuildDisplayList(aBuilder, dirty, pseudoStack);
+ aBuilder->DisplayCaret(child, dirty, pseudoStack.Content());
+
+ list.AppendToTop(pseudoStack.BorderBackground());
+ list.AppendToTop(pseudoStack.BlockBorderBackgrounds());
+ list.AppendToTop(pseudoStack.Floats());
+ list.AppendToTop(pseudoStack.Content());
+ list.AppendToTop(pseudoStack.Outlines());
+ extraPositionedDescendants.AppendToTop(pseudoStack.PositionedDescendants());
+#ifdef DEBUG
+ DisplayDebugBorders(aBuilder, child, aLists);
+#endif
+ }
+
+ buildingForChild.RestoreBuildingInvisibleItemsValue();
+
+ // Clear clip rect for the construction of the items below. Since we're
+ // clipping all their contents, they themselves don't need to be clipped.
+ clipState.Clear();
+
+ const DisplayItemScrollClip* containerItemScrollClip =
+ aBuilder->ClipState().CurrentAncestorScrollClipForStackingContextContents();
+
+ if (isPositioned || isVisuallyAtomic ||
+ (aFlags & DISPLAY_CHILD_FORCE_STACKING_CONTEXT)) {
+ // Genuine stacking contexts, and positioned pseudo-stacking-contexts,
+ // go in this level.
+ if (!list.IsEmpty()) {
+ nsDisplayItem* item = WrapInWrapList(aBuilder, child, &list, containerItemScrollClip);
+ if (isSVG) {
+ aLists.Content()->AppendNewToTop(item);
+ } else {
+ aLists.PositionedDescendants()->AppendNewToTop(item);
+ }
+ }
+ } else if (!isSVG && disp->IsFloating(child)) {
+ if (!list.IsEmpty()) {
+ aLists.Floats()->AppendNewToTop(WrapInWrapList(aBuilder, child, &list, containerItemScrollClip));
+ }
+ } else {
+ aLists.Content()->AppendToTop(&list);
+ }
+ // We delay placing the positioned descendants of positioned frames to here,
+ // because in the absence of z-index this is the correct order for them.
+ // This doesn't affect correctness because the positioned descendants list
+ // is sorted by z-order and content in BuildDisplayListForStackingContext,
+ // but it means that sort routine needs to do less work.
+ aLists.PositionedDescendants()->AppendToTop(&extraPositionedDescendants);
+}
+
+void
+nsIFrame::MarkAbsoluteFramesForDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect)
+{
+ if (IsAbsoluteContainer()) {
+ aBuilder->MarkFramesForDisplayList(this, GetAbsoluteContainingBlock()->GetChildList(), aDirtyRect);
+ }
+}
+
+nsresult
+nsFrame::GetContentForEvent(WidgetEvent* aEvent,
+ nsIContent** aContent)
+{
+ nsIFrame* f = nsLayoutUtils::GetNonGeneratedAncestor(this);
+ *aContent = f->GetContent();
+ NS_IF_ADDREF(*aContent);
+ return NS_OK;
+}
+
+void
+nsFrame::FireDOMEvent(const nsAString& aDOMEventName, nsIContent *aContent)
+{
+ nsIContent* target = aContent ? aContent : mContent;
+
+ if (target) {
+ RefPtr<AsyncEventDispatcher> asyncDispatcher =
+ new AsyncEventDispatcher(target, aDOMEventName, true, false);
+ DebugOnly<nsresult> rv = asyncDispatcher->PostDOMEvent();
+ NS_ASSERTION(NS_SUCCEEDED(rv), "AsyncEventDispatcher failed to dispatch");
+ }
+}
+
+nsresult
+nsFrame::HandleEvent(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+
+ if (aEvent->mMessage == eMouseMove) {
+ // XXX If the second argument of HandleDrag() is WidgetMouseEvent,
+ // the implementation becomes simpler.
+ return HandleDrag(aPresContext, aEvent, aEventStatus);
+ }
+
+ if ((aEvent->mClass == eMouseEventClass &&
+ aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) ||
+ aEvent->mClass == eTouchEventClass) {
+ if (aEvent->mMessage == eMouseDown || aEvent->mMessage == eTouchStart) {
+ HandlePress(aPresContext, aEvent, aEventStatus);
+ } else if (aEvent->mMessage == eMouseUp || aEvent->mMessage == eTouchEnd) {
+ HandleRelease(aPresContext, aEvent, aEventStatus);
+ }
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsFrame::GetDataForTableSelection(const nsFrameSelection* aFrameSelection,
+ nsIPresShell* aPresShell,
+ WidgetMouseEvent* aMouseEvent,
+ nsIContent** aParentContent,
+ int32_t* aContentOffset,
+ int32_t* aTarget)
+{
+ if (!aFrameSelection || !aPresShell || !aMouseEvent || !aParentContent || !aContentOffset || !aTarget)
+ return NS_ERROR_NULL_POINTER;
+
+ *aParentContent = nullptr;
+ *aContentOffset = 0;
+ *aTarget = 0;
+
+ int16_t displaySelection = aPresShell->GetSelectionFlags();
+
+ bool selectingTableCells = aFrameSelection->GetTableCellSelection();
+
+ // DISPLAY_ALL means we're in an editor.
+ // If already in cell selection mode,
+ // continue selecting with mouse drag or end on mouse up,
+ // or when using shift key to extend block of cells
+ // (Mouse down does normal selection unless Ctrl/Cmd is pressed)
+ bool doTableSelection =
+ displaySelection == nsISelectionDisplay::DISPLAY_ALL && selectingTableCells &&
+ (aMouseEvent->mMessage == eMouseMove ||
+ (aMouseEvent->mMessage == eMouseUp &&
+ aMouseEvent->button == WidgetMouseEvent::eLeftButton) ||
+ aMouseEvent->IsShift());
+
+ if (!doTableSelection)
+ {
+ // In Browser, special 'table selection' key must be pressed for table selection
+ // or when just Shift is pressed and we're already in table/cell selection mode
+#ifdef XP_MACOSX
+ doTableSelection = aMouseEvent->IsMeta() || (aMouseEvent->IsShift() && selectingTableCells);
+#else
+ doTableSelection = aMouseEvent->IsControl() || (aMouseEvent->IsShift() && selectingTableCells);
+#endif
+ }
+ if (!doTableSelection)
+ return NS_OK;
+
+ // Get the cell frame or table frame (or parent) of the current content node
+ nsIFrame *frame = this;
+ bool foundCell = false;
+ bool foundTable = false;
+
+ // Get the limiting node to stop parent frame search
+ nsIContent* limiter = aFrameSelection->GetLimiter();
+
+ // If our content node is an ancestor of the limiting node,
+ // we should stop the search right now.
+ if (limiter && nsContentUtils::ContentIsDescendantOf(limiter, GetContent()))
+ return NS_OK;
+
+ //We don't initiate row/col selection from here now,
+ // but we may in future
+ //bool selectColumn = false;
+ //bool selectRow = false;
+
+ while (frame)
+ {
+ // Check for a table cell by querying to a known CellFrame interface
+ nsITableCellLayout *cellElement = do_QueryFrame(frame);
+ if (cellElement)
+ {
+ foundCell = true;
+ //TODO: If we want to use proximity to top or left border
+ // for row and column selection, this is the place to do it
+ break;
+ }
+ else
+ {
+ // If not a cell, check for table
+ // This will happen when starting frame is the table or child of a table,
+ // such as a row (we were inbetween cells or in table border)
+ nsTableWrapperFrame *tableFrame = do_QueryFrame(frame);
+ if (tableFrame)
+ {
+ foundTable = true;
+ //TODO: How can we select row when along left table edge
+ // or select column when along top edge?
+ break;
+ } else {
+ frame = frame->GetParent();
+ // Stop if we have hit the selection's limiting content node
+ if (frame && frame->GetContent() == limiter)
+ break;
+ }
+ }
+ }
+ // We aren't in a cell or table
+ if (!foundCell && !foundTable) return NS_OK;
+
+ nsIContent* tableOrCellContent = frame->GetContent();
+ if (!tableOrCellContent) return NS_ERROR_FAILURE;
+
+ nsCOMPtr<nsIContent> parentContent = tableOrCellContent->GetParent();
+ if (!parentContent) return NS_ERROR_FAILURE;
+
+ int32_t offset = parentContent->IndexOf(tableOrCellContent);
+ // Not likely?
+ if (offset < 0) return NS_ERROR_FAILURE;
+
+ // Everything is OK -- set the return values
+ parentContent.forget(aParentContent);
+
+ *aContentOffset = offset;
+
+#if 0
+ if (selectRow)
+ *aTarget = nsISelectionPrivate::TABLESELECTION_ROW;
+ else if (selectColumn)
+ *aTarget = nsISelectionPrivate::TABLESELECTION_COLUMN;
+ else
+#endif
+ if (foundCell)
+ *aTarget = nsISelectionPrivate::TABLESELECTION_CELL;
+ else if (foundTable)
+ *aTarget = nsISelectionPrivate::TABLESELECTION_TABLE;
+
+ return NS_OK;
+}
+
+nsresult
+nsFrame::IsSelectable(bool* aSelectable, StyleUserSelect* aSelectStyle) const
+{
+ if (!aSelectable) //it's ok if aSelectStyle is null
+ return NS_ERROR_NULL_POINTER;
+
+ // Like 'visibility', we must check all the parents: if a parent
+ // is not selectable, none of its children is selectable.
+ //
+ // The -moz-all value acts similarly: if a frame has 'user-select:-moz-all',
+ // all its children are selectable, even those with 'user-select:none'.
+ //
+ // As a result, if 'none' and '-moz-all' are not present in the frame hierarchy,
+ // aSelectStyle returns the first style that is not AUTO. If these values
+ // are present in the frame hierarchy, aSelectStyle returns the style of the
+ // topmost parent that has either 'none' or '-moz-all'.
+ //
+ // The -moz-text value acts as a way to override an ancestor's all/-moz-all value.
+ //
+ // For instance, if the frame hierarchy is:
+ // AUTO -> _MOZ_ALL -> NONE -> TEXT, the returned value is ALL
+ // AUTO -> _MOZ_ALL -> NONE -> _MOZ_TEXT, the returned value is TEXT.
+ // TEXT -> NONE -> AUTO -> _MOZ_ALL, the returned value is TEXT
+ // _MOZ_ALL -> TEXT -> AUTO -> AUTO, the returned value is ALL
+ // _MOZ_ALL -> _MOZ_TEXT -> AUTO -> AUTO, the returned value is TEXT.
+ // AUTO -> CELL -> TEXT -> AUTO, the returned value is TEXT
+ //
+ StyleUserSelect selectStyle = StyleUserSelect::Auto;
+ nsIFrame* frame = const_cast<nsFrame*>(this);
+ bool containsEditable = false;
+
+ while (frame) {
+ const nsStyleUIReset* userinterface = frame->StyleUIReset();
+ switch (userinterface->mUserSelect) {
+ case StyleUserSelect::All:
+ case StyleUserSelect::MozAll:
+ {
+ // override the previous values
+ if (selectStyle != StyleUserSelect::MozText) {
+ selectStyle = userinterface->mUserSelect;
+ }
+ nsIContent* frameContent = frame->GetContent();
+ containsEditable = frameContent &&
+ frameContent->EditableDescendantCount() > 0;
+ break;
+ }
+ default:
+ // otherwise return the first value which is not 'auto'
+ if (selectStyle == StyleUserSelect::Auto) {
+ selectStyle = userinterface->mUserSelect;
+ }
+ break;
+ }
+ frame = nsLayoutUtils::GetParentOrPlaceholderFor(frame);
+ }
+
+ // convert internal values to standard values
+ if (selectStyle == StyleUserSelect::Auto ||
+ selectStyle == StyleUserSelect::MozText) {
+ selectStyle = StyleUserSelect::Text;
+ } else if (selectStyle == StyleUserSelect::MozAll) {
+ selectStyle = StyleUserSelect::All;
+ }
+
+ // If user tries to select all of a non-editable content,
+ // prevent selection if it contains editable content.
+ bool allowSelection = true;
+ if (selectStyle == StyleUserSelect::All) {
+ allowSelection = !containsEditable;
+ }
+
+ // return stuff
+ if (aSelectStyle) {
+ *aSelectStyle = selectStyle;
+ }
+
+ if (mState & NS_FRAME_GENERATED_CONTENT) {
+ *aSelectable = false;
+ } else {
+ *aSelectable = allowSelection && (selectStyle != StyleUserSelect::None);
+ }
+
+ return NS_OK;
+}
+
+/**
+ * Handles the Mouse Press Event for the frame
+ */
+NS_IMETHODIMP
+nsFrame::HandlePress(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ NS_ENSURE_ARG_POINTER(aEventStatus);
+ if (nsEventStatus_eConsumeNoDefault == *aEventStatus) {
+ return NS_OK;
+ }
+
+ NS_ENSURE_ARG_POINTER(aEvent);
+ if (aEvent->mClass == eTouchEventClass) {
+ return NS_OK;
+ }
+
+ //We often get out of sync state issues with mousedown events that
+ //get interrupted by alerts/dialogs.
+ //Check with the ESM to see if we should process this one
+ if (!aPresContext->EventStateManager()->EventStatusOK(aEvent))
+ return NS_OK;
+
+ nsresult rv;
+ nsIPresShell *shell = aPresContext->GetPresShell();
+ if (!shell)
+ return NS_ERROR_FAILURE;
+
+ // if we are in Navigator and the click is in a draggable node, we don't want
+ // to start selection because we don't want to interfere with a potential
+ // drag of said node and steal all its glory.
+ int16_t isEditor = shell->GetSelectionFlags();
+ //weaaak. only the editor can display frame selection not just text and images
+ isEditor = isEditor == nsISelectionDisplay::DISPLAY_ALL;
+
+ WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+
+ if (!mouseEvent->IsAlt()) {
+ for (nsIContent* content = mContent; content;
+ content = content->GetParent()) {
+ if (nsContentUtils::ContentIsDraggable(content) &&
+ !content->IsEditable()) {
+ // coordinate stuff is the fix for bug #55921
+ if ((mRect - GetPosition()).Contains(
+ nsLayoutUtils::GetEventCoordinatesRelativeTo(mouseEvent, this))) {
+ return NS_OK;
+ }
+ }
+ }
+ }
+
+ // check whether style allows selection
+ // if not, don't tell selection the mouse event even occurred.
+ bool selectable;
+ StyleUserSelect selectStyle;
+ rv = IsSelectable(&selectable, &selectStyle);
+ if (NS_FAILED(rv)) return rv;
+
+ // check for select: none
+ if (!selectable)
+ return NS_OK;
+
+ // When implementing StyleUserSelect::Element, StyleUserSelect::Elements and
+ // StyleUserSelect::Toggle, need to change this logic
+ bool useFrameSelection = (selectStyle == StyleUserSelect::Text);
+
+ // If the mouse is dragged outside the nearest enclosing scrollable area
+ // while making a selection, the area will be scrolled. To do this, capture
+ // the mouse on the nearest scrollable frame. If there isn't a scrollable
+ // frame, or something else is already capturing the mouse, there's no
+ // reason to capture.
+ bool hasCapturedContent = false;
+ if (!nsIPresShell::GetCapturingContent()) {
+ nsIScrollableFrame* scrollFrame =
+ nsLayoutUtils::GetNearestScrollableFrame(this,
+ nsLayoutUtils::SCROLLABLE_SAME_DOC |
+ nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN);
+ if (scrollFrame) {
+ nsIFrame* capturingFrame = do_QueryFrame(scrollFrame);
+ nsIPresShell::SetCapturingContent(capturingFrame->GetContent(),
+ CAPTURE_IGNOREALLOWED);
+ hasCapturedContent = true;
+ }
+ }
+
+ // XXX This is screwy; it really should use the selection frame, not the
+ // event frame
+ const nsFrameSelection* frameselection = nullptr;
+ if (useFrameSelection)
+ frameselection = GetConstFrameSelection();
+ else
+ frameselection = shell->ConstFrameSelection();
+
+ if (!frameselection || frameselection->GetDisplaySelection() == nsISelectionController::SELECTION_OFF)
+ return NS_OK;//nothing to do we cannot affect selection from here
+
+#ifdef XP_MACOSX
+ if (mouseEvent->IsControl())
+ return NS_OK;//short circuit. hard coded for mac due to time restraints.
+ bool control = mouseEvent->IsMeta();
+#else
+ bool control = mouseEvent->IsControl();
+#endif
+
+ RefPtr<nsFrameSelection> fc = const_cast<nsFrameSelection*>(frameselection);
+ if (mouseEvent->mClickCount > 1) {
+ // These methods aren't const but can't actually delete anything,
+ // so no need for nsWeakFrame.
+ fc->SetDragState(true);
+ fc->SetMouseDoubleDown(true);
+ return HandleMultiplePress(aPresContext, mouseEvent, aEventStatus, control);
+ }
+
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mouseEvent, this);
+ ContentOffsets offsets = GetContentOffsetsFromPoint(pt, SKIP_HIDDEN);
+
+ if (!offsets.content)
+ return NS_ERROR_FAILURE;
+
+ // On touchables devices, touch the screen is usually a pan action,
+ // so let's reposition the caret if needed but do not select text
+ // if the touch did not happen over an editable element. Otherwise,
+ // let the user move the caret by tapping and dragging.
+ if (!offsets.content->IsEditable() &&
+ Preferences::GetBool("browser.ignoreNativeFrameTextSelection", false)) {
+ // On touchables devices, mouse events are generated if the gesture is a tap.
+ // Such events are never going to generate a drag action, so let's release
+ // captured content if any.
+ if (hasCapturedContent) {
+ nsIPresShell::SetCapturingContent(nullptr, 0);
+ }
+
+ return fc->HandleClick(offsets.content, offsets.StartOffset(),
+ offsets.EndOffset(), false, false,
+ offsets.associate);
+ }
+
+ // Let Ctrl/Cmd+mouse down do table selection instead of drag initiation
+ nsCOMPtr<nsIContent>parentContent;
+ int32_t contentOffset;
+ int32_t target;
+ rv = GetDataForTableSelection(frameselection, shell, mouseEvent,
+ getter_AddRefs(parentContent), &contentOffset,
+ &target);
+ if (NS_SUCCEEDED(rv) && parentContent)
+ {
+ fc->SetDragState(true);
+ return fc->HandleTableSelection(parentContent, contentOffset, target,
+ mouseEvent);
+ }
+
+ fc->SetDelayedCaretData(0);
+
+ // Check if any part of this frame is selected, and if the
+ // user clicked inside the selected region. If so, we delay
+ // starting a new selection since the user may be trying to
+ // drag the selected region to some other app.
+
+ SelectionDetails *details = 0;
+ if (GetContent()->IsSelectionDescendant())
+ {
+ bool inSelection = false;
+ details = frameselection->LookUpSelection(offsets.content, 0,
+ offsets.EndOffset(), false);
+
+ //
+ // If there are any details, check to see if the user clicked
+ // within any selected region of the frame.
+ //
+
+ SelectionDetails *curDetail = details;
+
+ while (curDetail)
+ {
+ //
+ // If the user clicked inside a selection, then just
+ // return without doing anything. We will handle placing
+ // the caret later on when the mouse is released. We ignore
+ // the spellcheck, find and url formatting selections.
+ //
+ if (curDetail->mSelectionType != SelectionType::eSpellCheck &&
+ curDetail->mSelectionType != SelectionType::eFind &&
+ curDetail->mSelectionType != SelectionType::eURLSecondary &&
+ curDetail->mSelectionType != SelectionType::eURLStrikeout &&
+ curDetail->mStart <= offsets.StartOffset() &&
+ offsets.EndOffset() <= curDetail->mEnd)
+ {
+ inSelection = true;
+ }
+
+ SelectionDetails *nextDetail = curDetail->mNext;
+ delete curDetail;
+ curDetail = nextDetail;
+ }
+
+ if (inSelection) {
+ fc->SetDragState(false);
+ fc->SetDelayedCaretData(mouseEvent);
+ return NS_OK;
+ }
+ }
+
+ fc->SetDragState(true);
+
+ // Do not touch any nsFrame members after this point without adding
+ // weakFrame checks.
+ rv = fc->HandleClick(offsets.content, offsets.StartOffset(),
+ offsets.EndOffset(), mouseEvent->IsShift(), control,
+ offsets.associate);
+
+ if (NS_FAILED(rv))
+ return rv;
+
+ if (offsets.offset != offsets.secondaryOffset)
+ fc->MaintainSelection();
+
+ if (isEditor && !mouseEvent->IsShift() &&
+ (offsets.EndOffset() - offsets.StartOffset()) == 1)
+ {
+ // A single node is selected and we aren't extending an existing
+ // selection, which means the user clicked directly on an object (either
+ // -moz-user-select: all or a non-text node without children).
+ // Therefore, disable selection extension during mouse moves.
+ // XXX This is a bit hacky; shouldn't editor be able to deal with this?
+ fc->SetDragState(false);
+ }
+
+ return rv;
+}
+
+/*
+ * SelectByTypeAtPoint
+ *
+ * Search for selectable content at point and attempt to select
+ * based on the start and end selection behaviours.
+ *
+ * @param aPresContext Presentation context
+ * @param aPoint Point at which selection will occur. Coordinates
+ * should be relaitve to this frame.
+ * @param aBeginAmountType, aEndAmountType Selection behavior, see
+ * nsIFrame for definitions.
+ * @param aSelectFlags Selection flags defined in nsFame.h.
+ * @return success or failure at finding suitable content to select.
+ */
+nsresult
+nsFrame::SelectByTypeAtPoint(nsPresContext* aPresContext,
+ const nsPoint& aPoint,
+ nsSelectionAmount aBeginAmountType,
+ nsSelectionAmount aEndAmountType,
+ uint32_t aSelectFlags)
+{
+ NS_ENSURE_ARG_POINTER(aPresContext);
+
+ // No point in selecting if selection is turned off
+ if (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF)
+ return NS_OK;
+
+ ContentOffsets offsets = GetContentOffsetsFromPoint(aPoint, SKIP_HIDDEN);
+ if (!offsets.content)
+ return NS_ERROR_FAILURE;
+
+ int32_t offset;
+ const nsFrameSelection* frameSelection =
+ PresContext()->GetPresShell()->ConstFrameSelection();
+ nsIFrame* theFrame = frameSelection->
+ GetFrameForNodeOffset(offsets.content, offsets.offset,
+ offsets.associate, &offset);
+ if (!theFrame)
+ return NS_ERROR_FAILURE;
+
+ nsFrame* frame = static_cast<nsFrame*>(theFrame);
+ return frame->PeekBackwardAndForward(aBeginAmountType, aEndAmountType, offset,
+ aBeginAmountType != eSelectWord,
+ aSelectFlags);
+}
+
+/**
+ * Multiple Mouse Press -- line or paragraph selection -- for the frame.
+ * Wouldn't it be nice if this didn't have to be hardwired into Frame code?
+ */
+NS_IMETHODIMP
+nsFrame::HandleMultiplePress(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus,
+ bool aControlHeld)
+{
+ NS_ENSURE_ARG_POINTER(aEvent);
+ NS_ENSURE_ARG_POINTER(aEventStatus);
+
+ if (nsEventStatus_eConsumeNoDefault == *aEventStatus ||
+ DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF) {
+ return NS_OK;
+ }
+
+ // Find out whether we're doing line or paragraph selection.
+ // If browser.triple_click_selects_paragraph is true, triple-click selects paragraph.
+ // Otherwise, triple-click selects line, and quadruple-click selects paragraph
+ // (on platforms that support quadruple-click).
+ nsSelectionAmount beginAmount, endAmount;
+ WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+ if (!mouseEvent) {
+ return NS_OK;
+ }
+
+ if (mouseEvent->mClickCount == 4) {
+ beginAmount = endAmount = eSelectParagraph;
+ } else if (mouseEvent->mClickCount == 3) {
+ if (Preferences::GetBool("browser.triple_click_selects_paragraph")) {
+ beginAmount = endAmount = eSelectParagraph;
+ } else {
+ beginAmount = eSelectBeginLine;
+ endAmount = eSelectEndLine;
+ }
+ } else if (mouseEvent->mClickCount == 2) {
+ // We only want inline frames; PeekBackwardAndForward dislikes blocks
+ beginAmount = endAmount = eSelectWord;
+ } else {
+ return NS_OK;
+ }
+
+ nsPoint relPoint =
+ nsLayoutUtils::GetEventCoordinatesRelativeTo(mouseEvent, this);
+ return SelectByTypeAtPoint(aPresContext, relPoint, beginAmount, endAmount,
+ (aControlHeld ? SELECT_ACCUMULATE : 0));
+}
+
+nsresult
+nsFrame::PeekBackwardAndForward(nsSelectionAmount aAmountBack,
+ nsSelectionAmount aAmountForward,
+ int32_t aStartPos,
+ bool aJumpLines,
+ uint32_t aSelectFlags)
+{
+ nsIFrame* baseFrame = this;
+ int32_t baseOffset = aStartPos;
+ nsresult rv;
+
+ if (aAmountBack == eSelectWord) {
+ // To avoid selecting the previous word when at start of word,
+ // first move one character forward.
+ nsPeekOffsetStruct pos(eSelectCharacter,
+ eDirNext,
+ aStartPos,
+ nsPoint(0, 0),
+ aJumpLines,
+ true, //limit on scrolled views
+ false,
+ false,
+ false);
+ rv = PeekOffset(&pos);
+ if (NS_SUCCEEDED(rv)) {
+ baseFrame = pos.mResultFrame;
+ baseOffset = pos.mContentOffset;
+ }
+ }
+
+ // Use peek offset one way then the other:
+ nsPeekOffsetStruct startpos(aAmountBack,
+ eDirPrevious,
+ baseOffset,
+ nsPoint(0, 0),
+ aJumpLines,
+ true, //limit on scrolled views
+ false,
+ false,
+ false);
+ rv = baseFrame->PeekOffset(&startpos);
+ if (NS_FAILED(rv))
+ return rv;
+
+ nsPeekOffsetStruct endpos(aAmountForward,
+ eDirNext,
+ aStartPos,
+ nsPoint(0, 0),
+ aJumpLines,
+ true, //limit on scrolled views
+ false,
+ false,
+ false);
+ rv = PeekOffset(&endpos);
+ if (NS_FAILED(rv))
+ return rv;
+
+ // Keep frameSelection alive.
+ RefPtr<nsFrameSelection> frameSelection = GetFrameSelection();
+
+ rv = frameSelection->HandleClick(startpos.mResultContent,
+ startpos.mContentOffset, startpos.mContentOffset,
+ false, (aSelectFlags & SELECT_ACCUMULATE),
+ CARET_ASSOCIATE_AFTER);
+ if (NS_FAILED(rv))
+ return rv;
+
+ rv = frameSelection->HandleClick(endpos.mResultContent,
+ endpos.mContentOffset, endpos.mContentOffset,
+ true, false,
+ CARET_ASSOCIATE_BEFORE);
+ if (NS_FAILED(rv))
+ return rv;
+
+ // maintain selection
+ return frameSelection->MaintainSelection(aAmountBack);
+}
+
+NS_IMETHODIMP nsFrame::HandleDrag(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ MOZ_ASSERT(aEvent->mClass == eMouseEventClass,
+ "HandleDrag can only handle mouse event");
+
+ RefPtr<nsFrameSelection> frameselection = GetFrameSelection();
+ bool mouseDown = frameselection->GetDragState();
+ if (!mouseDown) {
+ return NS_OK;
+ }
+
+ nsIFrame* scrollbar =
+ nsLayoutUtils::GetClosestFrameOfType(this, nsGkAtoms::scrollbarFrame);
+ if (!scrollbar) {
+ // XXX Do we really need to exclude non-selectable content here?
+ // GetContentOffsetsFromPoint can handle it just fine, although some
+ // other stuff might not like it.
+ // NOTE: DisplaySelection() returns SELECTION_OFF for non-selectable frames.
+ if (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF) {
+ return NS_OK;
+ }
+ }
+
+ frameselection->StopAutoScrollTimer();
+
+ // Check if we are dragging in a table cell
+ nsCOMPtr<nsIContent> parentContent;
+ int32_t contentOffset;
+ int32_t target;
+ WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+ nsCOMPtr<nsIPresShell> presShell = aPresContext->PresShell();
+ nsresult result;
+ result = GetDataForTableSelection(frameselection, presShell, mouseEvent,
+ getter_AddRefs(parentContent),
+ &contentOffset, &target);
+
+ nsWeakFrame weakThis = this;
+ if (NS_SUCCEEDED(result) && parentContent) {
+ frameselection->HandleTableSelection(parentContent, contentOffset, target,
+ mouseEvent);
+ } else {
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mouseEvent, this);
+ frameselection->HandleDrag(this, pt);
+ }
+
+ // The frameselection object notifies selection listeners synchronously above
+ // which might have killed us.
+ if (!weakThis.IsAlive()) {
+ return NS_OK;
+ }
+
+ // get the nearest scrollframe
+ nsIScrollableFrame* scrollFrame =
+ nsLayoutUtils::GetNearestScrollableFrame(this,
+ nsLayoutUtils::SCROLLABLE_SAME_DOC |
+ nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN);
+
+ if (scrollFrame) {
+ nsIFrame* capturingFrame = scrollFrame->GetScrolledFrame();
+ if (capturingFrame) {
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(mouseEvent,
+ capturingFrame);
+ frameselection->StartAutoScrollTimer(capturingFrame, pt, 30);
+ }
+ }
+
+ return NS_OK;
+}
+
+/**
+ * This static method handles part of the nsFrame::HandleRelease in a way
+ * which doesn't rely on the nsFrame object to stay alive.
+ */
+static nsresult
+HandleFrameSelection(nsFrameSelection* aFrameSelection,
+ nsIFrame::ContentOffsets& aOffsets,
+ bool aHandleTableSel,
+ int32_t aContentOffsetForTableSel,
+ int32_t aTargetForTableSel,
+ nsIContent* aParentContentForTableSel,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ if (!aFrameSelection) {
+ return NS_OK;
+ }
+
+ nsresult rv = NS_OK;
+
+ if (nsEventStatus_eConsumeNoDefault != *aEventStatus) {
+ if (!aHandleTableSel) {
+ if (!aOffsets.content || !aFrameSelection->HasDelayedCaretData()) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // We are doing this to simulate what we would have done on HandlePress.
+ // We didn't do it there to give the user an opportunity to drag
+ // the text, but since they didn't drag, we want to place the
+ // caret.
+ // However, we'll use the mouse position from the release, since:
+ // * it's easier
+ // * that's the normal click position to use (although really, in
+ // the normal case, small movements that don't count as a drag
+ // can do selection)
+ aFrameSelection->SetDragState(true);
+
+ rv = aFrameSelection->HandleClick(aOffsets.content,
+ aOffsets.StartOffset(),
+ aOffsets.EndOffset(),
+ aFrameSelection->IsShiftDownInDelayedCaretData(),
+ false,
+ aOffsets.associate);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ } else if (aParentContentForTableSel) {
+ aFrameSelection->SetDragState(false);
+ rv = aFrameSelection->HandleTableSelection(
+ aParentContentForTableSel,
+ aContentOffsetForTableSel,
+ aTargetForTableSel,
+ aEvent->AsMouseEvent());
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+ aFrameSelection->SetDelayedCaretData(0);
+ }
+
+ aFrameSelection->SetDragState(false);
+ aFrameSelection->StopAutoScrollTimer();
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsFrame::HandleRelease(nsPresContext* aPresContext,
+ WidgetGUIEvent* aEvent,
+ nsEventStatus* aEventStatus)
+{
+ if (aEvent->mClass != eMouseEventClass) {
+ return NS_OK;
+ }
+
+ nsIFrame* activeFrame = GetActiveSelectionFrame(aPresContext, this);
+
+ nsCOMPtr<nsIContent> captureContent = nsIPresShell::GetCapturingContent();
+
+ // We can unconditionally stop capturing because
+ // we should never be capturing when the mouse button is up
+ nsIPresShell::SetCapturingContent(nullptr, 0);
+
+ bool selectionOff =
+ (DisplaySelection(aPresContext) == nsISelectionController::SELECTION_OFF);
+
+ RefPtr<nsFrameSelection> frameselection;
+ ContentOffsets offsets;
+ nsCOMPtr<nsIContent> parentContent;
+ int32_t contentOffsetForTableSel = 0;
+ int32_t targetForTableSel = 0;
+ bool handleTableSelection = true;
+
+ if (!selectionOff) {
+ frameselection = GetFrameSelection();
+ if (nsEventStatus_eConsumeNoDefault != *aEventStatus && frameselection) {
+ // Check if the frameselection recorded the mouse going down.
+ // If not, the user must have clicked in a part of the selection.
+ // Place the caret before continuing!
+
+ if (frameselection->MouseDownRecorded()) {
+ nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, this);
+ offsets = GetContentOffsetsFromPoint(pt, SKIP_HIDDEN);
+ handleTableSelection = false;
+ } else {
+ GetDataForTableSelection(frameselection, PresContext()->PresShell(),
+ aEvent->AsMouseEvent(),
+ getter_AddRefs(parentContent),
+ &contentOffsetForTableSel,
+ &targetForTableSel);
+ }
+ }
+ }
+
+ // We might be capturing in some other document and the event just happened to
+ // trickle down here. Make sure that document's frame selection is notified.
+ // Note, this may cause the current nsFrame object to be deleted, bug 336592.
+ RefPtr<nsFrameSelection> frameSelection;
+ if (activeFrame != this &&
+ static_cast<nsFrame*>(activeFrame)->DisplaySelection(activeFrame->PresContext())
+ != nsISelectionController::SELECTION_OFF) {
+ frameSelection = activeFrame->GetFrameSelection();
+ }
+
+ // Also check the selection of the capturing content which might be in a
+ // different document.
+ if (!frameSelection && captureContent) {
+ nsIDocument* doc = captureContent->GetUncomposedDoc();
+ if (doc) {
+ nsIPresShell* capturingShell = doc->GetShell();
+ if (capturingShell && capturingShell != PresContext()->GetPresShell()) {
+ frameSelection = capturingShell->FrameSelection();
+ }
+ }
+ }
+
+ if (frameSelection) {
+ frameSelection->SetDragState(false);
+ frameSelection->StopAutoScrollTimer();
+ nsIScrollableFrame* scrollFrame =
+ nsLayoutUtils::GetNearestScrollableFrame(this,
+ nsLayoutUtils::SCROLLABLE_SAME_DOC |
+ nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN);
+ if (scrollFrame) {
+ // Perform any additional scrolling needed to maintain CSS snap point
+ // requirements when autoscrolling is over.
+ scrollFrame->ScrollSnap();
+ }
+ }
+
+ // Do not call any methods of the current object after this point!!!
+ // The object is perhaps dead!
+
+ return selectionOff
+ ? NS_OK
+ : HandleFrameSelection(frameselection, offsets, handleTableSelection,
+ contentOffsetForTableSel, targetForTableSel,
+ parentContent, aEvent, aEventStatus);
+}
+
+struct MOZ_STACK_CLASS FrameContentRange {
+ FrameContentRange(nsIContent* aContent, int32_t aStart, int32_t aEnd) :
+ content(aContent), start(aStart), end(aEnd) { }
+ nsCOMPtr<nsIContent> content;
+ int32_t start;
+ int32_t end;
+};
+
+// Retrieve the content offsets of a frame
+static FrameContentRange GetRangeForFrame(nsIFrame* aFrame) {
+ nsCOMPtr<nsIContent> content, parent;
+ content = aFrame->GetContent();
+ if (!content) {
+ NS_WARNING("Frame has no content");
+ return FrameContentRange(nullptr, -1, -1);
+ }
+ nsIAtom* type = aFrame->GetType();
+ if (type == nsGkAtoms::textFrame) {
+ int32_t offset, offsetEnd;
+ aFrame->GetOffsets(offset, offsetEnd);
+ return FrameContentRange(content, offset, offsetEnd);
+ }
+ if (type == nsGkAtoms::brFrame) {
+ parent = content->GetParent();
+ int32_t beginOffset = parent->IndexOf(content);
+ return FrameContentRange(parent, beginOffset, beginOffset);
+ }
+ // Loop to deal with anonymous content, which has no index; this loop
+ // probably won't run more than twice under normal conditions
+ do {
+ parent = content->GetParent();
+ if (parent) {
+ int32_t beginOffset = parent->IndexOf(content);
+ if (beginOffset >= 0)
+ return FrameContentRange(parent, beginOffset, beginOffset + 1);
+ content = parent;
+ }
+ } while (parent);
+
+ // The root content node must act differently
+ return FrameContentRange(content, 0, content->GetChildCount());
+}
+
+// The FrameTarget represents the closest frame to a point that can be selected
+// The frame is the frame represented, frameEdge says whether one end of the
+// frame is the result (in which case different handling is needed), and
+// afterFrame says which end is repersented if frameEdge is true
+struct FrameTarget {
+ FrameTarget(nsIFrame* aFrame, bool aFrameEdge, bool aAfterFrame,
+ bool aEmptyBlock = false) :
+ frame(aFrame), frameEdge(aFrameEdge), afterFrame(aAfterFrame),
+ emptyBlock(aEmptyBlock) { }
+ static FrameTarget Null() {
+ return FrameTarget(nullptr, false, false);
+ }
+ bool IsNull() {
+ return !frame;
+ }
+ nsIFrame* frame;
+ bool frameEdge;
+ bool afterFrame;
+ bool emptyBlock;
+};
+
+// See function implementation for information
+static FrameTarget GetSelectionClosestFrame(nsIFrame* aFrame, nsPoint aPoint,
+ uint32_t aFlags);
+
+static bool SelfIsSelectable(nsIFrame* aFrame, uint32_t aFlags)
+{
+ if ((aFlags & nsIFrame::SKIP_HIDDEN) &&
+ !aFrame->StyleVisibility()->IsVisible()) {
+ return false;
+ }
+ return !aFrame->IsGeneratedContentFrame() &&
+ aFrame->StyleUIReset()->mUserSelect != StyleUserSelect::None;
+}
+
+static bool SelectionDescendToKids(nsIFrame* aFrame) {
+ StyleUserSelect style = aFrame->StyleUIReset()->mUserSelect;
+ nsIFrame* parent = aFrame->GetParent();
+ // If we are only near (not directly over) then don't traverse
+ // frames with independent selection (e.g. text and list controls)
+ // unless we're already inside such a frame (see bug 268497). Note that this
+ // prevents any of the users of this method from entering form controls.
+ // XXX We might want some way to allow using the up-arrow to go into a form
+ // control, but the focus didn't work right anyway; it'd probably be enough
+ // if the left and right arrows could enter textboxes (which I don't believe
+ // they can at the moment)
+ return !aFrame->IsGeneratedContentFrame() &&
+ style != StyleUserSelect::All &&
+ style != StyleUserSelect::None &&
+ ((parent->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION) ||
+ !(aFrame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION));
+}
+
+static FrameTarget GetSelectionClosestFrameForChild(nsIFrame* aChild,
+ nsPoint aPoint,
+ uint32_t aFlags)
+{
+ nsIFrame* parent = aChild->GetParent();
+ if (SelectionDescendToKids(aChild)) {
+ nsPoint pt = aPoint - aChild->GetOffsetTo(parent);
+ return GetSelectionClosestFrame(aChild, pt, aFlags);
+ }
+ return FrameTarget(aChild, false, false);
+}
+
+// When the cursor needs to be at the beginning of a block, it shouldn't be
+// before the first child. A click on a block whose first child is a block
+// should put the cursor in the child. The cursor shouldn't be between the
+// blocks, because that's not where it's expected.
+// Note that this method is guaranteed to succeed.
+static FrameTarget DrillDownToSelectionFrame(nsIFrame* aFrame,
+ bool aEndFrame, uint32_t aFlags) {
+ if (SelectionDescendToKids(aFrame)) {
+ nsIFrame* result = nullptr;
+ nsIFrame *frame = aFrame->PrincipalChildList().FirstChild();
+ if (!aEndFrame) {
+ while (frame && (!SelfIsSelectable(frame, aFlags) ||
+ frame->IsEmpty()))
+ frame = frame->GetNextSibling();
+ if (frame)
+ result = frame;
+ } else {
+ // Because the frame tree is singly linked, to find the last frame,
+ // we have to iterate through all the frames
+ // XXX I have a feeling this could be slow for long blocks, although
+ // I can't find any slowdowns
+ while (frame) {
+ if (!frame->IsEmpty() && SelfIsSelectable(frame, aFlags))
+ result = frame;
+ frame = frame->GetNextSibling();
+ }
+ }
+ if (result)
+ return DrillDownToSelectionFrame(result, aEndFrame, aFlags);
+ }
+ // If the current frame has no targetable children, target the current frame
+ return FrameTarget(aFrame, true, aEndFrame);
+}
+
+// This method finds the closest valid FrameTarget on a given line; if there is
+// no valid FrameTarget on the line, it returns a null FrameTarget
+static FrameTarget GetSelectionClosestFrameForLine(
+ nsBlockFrame* aParent,
+ nsBlockFrame::LineIterator aLine,
+ nsPoint aPoint,
+ uint32_t aFlags)
+{
+ nsIFrame *frame = aLine->mFirstChild;
+ // Account for end of lines (any iterator from the block is valid)
+ if (aLine == aParent->LinesEnd())
+ return DrillDownToSelectionFrame(aParent, true, aFlags);
+ nsIFrame *closestFromIStart = nullptr, *closestFromIEnd = nullptr;
+ nscoord closestIStart = aLine->IStart(), closestIEnd = aLine->IEnd();
+ WritingMode wm = aLine->mWritingMode;
+ LogicalPoint pt(wm, aPoint, aLine->mContainerSize);
+ bool canSkipBr = false;
+ for (int32_t n = aLine->GetChildCount(); n;
+ --n, frame = frame->GetNextSibling()) {
+ // Skip brFrames. Can only skip if the line contains at least
+ // one selectable and non-empty frame before
+ if (!SelfIsSelectable(frame, aFlags) || frame->IsEmpty() ||
+ (canSkipBr && frame->GetType() == nsGkAtoms::brFrame)) {
+ continue;
+ }
+ canSkipBr = true;
+ LogicalRect frameRect = LogicalRect(wm, frame->GetRect(),
+ aLine->mContainerSize);
+ if (pt.I(wm) >= frameRect.IStart(wm)) {
+ if (pt.I(wm) < frameRect.IEnd(wm)) {
+ return GetSelectionClosestFrameForChild(frame, aPoint, aFlags);
+ }
+ if (frameRect.IEnd(wm) >= closestIStart) {
+ closestFromIStart = frame;
+ closestIStart = frameRect.IEnd(wm);
+ }
+ } else {
+ if (frameRect.IStart(wm) <= closestIEnd) {
+ closestFromIEnd = frame;
+ closestIEnd = frameRect.IStart(wm);
+ }
+ }
+ }
+ if (!closestFromIStart && !closestFromIEnd) {
+ // We should only get here if there are no selectable frames on a line
+ // XXX Do we need more elaborate handling here?
+ return FrameTarget::Null();
+ }
+ if (closestFromIStart &&
+ (!closestFromIEnd ||
+ (abs(pt.I(wm) - closestIStart) <= abs(pt.I(wm) - closestIEnd)))) {
+ return GetSelectionClosestFrameForChild(closestFromIStart, aPoint,
+ aFlags);
+ }
+ return GetSelectionClosestFrameForChild(closestFromIEnd, aPoint, aFlags);
+}
+
+// This method is for the special handling we do for block frames; they're
+// special because they represent paragraphs and because they are organized
+// into lines, which have bounds that are not stored elsewhere in the
+// frame tree. Returns a null FrameTarget for frames which are not
+// blocks or blocks with no lines except editable one.
+static FrameTarget GetSelectionClosestFrameForBlock(nsIFrame* aFrame,
+ nsPoint aPoint,
+ uint32_t aFlags)
+{
+ nsBlockFrame* bf = nsLayoutUtils::GetAsBlock(aFrame); // used only for QI
+ if (!bf)
+ return FrameTarget::Null();
+
+ // This code searches for the correct line
+ nsBlockFrame::LineIterator firstLine = bf->LinesBegin();
+ nsBlockFrame::LineIterator end = bf->LinesEnd();
+ if (firstLine == end) {
+ nsIContent *blockContent = aFrame->GetContent();
+ if (blockContent) {
+ // Return with empty flag true.
+ return FrameTarget(aFrame, false, false, true);
+ }
+ return FrameTarget::Null();
+ }
+ nsBlockFrame::LineIterator curLine = firstLine;
+ nsBlockFrame::LineIterator closestLine = end;
+ // Convert aPoint into a LogicalPoint in the writing-mode of this block
+ WritingMode wm = curLine->mWritingMode;
+ LogicalPoint pt(wm, aPoint, curLine->mContainerSize);
+ while (curLine != end) {
+ // Check to see if our point lies within the line's block-direction bounds
+ nscoord BCoord = pt.B(wm) - curLine->BStart();
+ nscoord BSize = curLine->BSize();
+ if (BCoord >= 0 && BCoord < BSize) {
+ closestLine = curLine;
+ break; // We found the line; stop looking
+ }
+ if (BCoord < 0)
+ break;
+ ++curLine;
+ }
+
+ if (closestLine == end) {
+ nsBlockFrame::LineIterator prevLine = curLine.prev();
+ nsBlockFrame::LineIterator nextLine = curLine;
+ // Avoid empty lines
+ while (nextLine != end && nextLine->IsEmpty())
+ ++nextLine;
+ while (prevLine != end && prevLine->IsEmpty())
+ --prevLine;
+
+ // This hidden pref dictates whether a point above or below all lines comes
+ // up with a line or the beginning or end of the frame; 0 on Windows,
+ // 1 on other platforms by default at the writing of this code
+ int32_t dragOutOfFrame =
+ Preferences::GetInt("browser.drag_out_of_frame_style");
+
+ if (prevLine == end) {
+ if (dragOutOfFrame == 1 || nextLine == end)
+ return DrillDownToSelectionFrame(aFrame, false, aFlags);
+ closestLine = nextLine;
+ } else if (nextLine == end) {
+ if (dragOutOfFrame == 1)
+ return DrillDownToSelectionFrame(aFrame, true, aFlags);
+ closestLine = prevLine;
+ } else { // Figure out which line is closer
+ if (pt.B(wm) - prevLine->BEnd() < nextLine->BStart() - pt.B(wm))
+ closestLine = prevLine;
+ else
+ closestLine = nextLine;
+ }
+ }
+
+ do {
+ FrameTarget target = GetSelectionClosestFrameForLine(bf, closestLine,
+ aPoint, aFlags);
+ if (!target.IsNull())
+ return target;
+ ++closestLine;
+ } while (closestLine != end);
+ // Fall back to just targeting the last targetable place
+ return DrillDownToSelectionFrame(aFrame, true, aFlags);
+}
+
+// GetSelectionClosestFrame is the helper function that calculates the closest
+// frame to the given point.
+// It doesn't completely account for offset styles, so needs to be used in
+// restricted environments.
+// Cannot handle overlapping frames correctly, so it should receive the output
+// of GetFrameForPoint
+// Guaranteed to return a valid FrameTarget
+static FrameTarget GetSelectionClosestFrame(nsIFrame* aFrame, nsPoint aPoint,
+ uint32_t aFlags)
+{
+ {
+ // Handle blocks; if the frame isn't a block, the method fails
+ FrameTarget target = GetSelectionClosestFrameForBlock(aFrame, aPoint, aFlags);
+ if (!target.IsNull())
+ return target;
+ }
+
+ nsIFrame *kid = aFrame->PrincipalChildList().FirstChild();
+
+ if (kid) {
+ // Go through all the child frames to find the closest one
+ nsIFrame::FrameWithDistance closest = { nullptr, nscoord_MAX, nscoord_MAX };
+ for (; kid; kid = kid->GetNextSibling()) {
+ if (!SelfIsSelectable(kid, aFlags) || kid->IsEmpty())
+ continue;
+
+ kid->FindCloserFrameForSelection(aPoint, &closest);
+ }
+ if (closest.mFrame) {
+ if (closest.mFrame->IsSVGText())
+ return FrameTarget(closest.mFrame, false, false);
+ return GetSelectionClosestFrameForChild(closest.mFrame, aPoint, aFlags);
+ }
+ }
+ return FrameTarget(aFrame, false, false);
+}
+
+nsIFrame::ContentOffsets OffsetsForSingleFrame(nsIFrame* aFrame, nsPoint aPoint)
+{
+ nsIFrame::ContentOffsets offsets;
+ FrameContentRange range = GetRangeForFrame(aFrame);
+ offsets.content = range.content;
+ // If there are continuations (meaning it's not one rectangle), this is the
+ // best this function can do
+ if (aFrame->GetNextContinuation() || aFrame->GetPrevContinuation()) {
+ offsets.offset = range.start;
+ offsets.secondaryOffset = range.end;
+ offsets.associate = CARET_ASSOCIATE_AFTER;
+ return offsets;
+ }
+
+ // Figure out whether the offsets should be over, after, or before the frame
+ nsRect rect(nsPoint(0, 0), aFrame->GetSize());
+
+ bool isBlock = aFrame->GetDisplay() != StyleDisplay::Inline;
+ bool isRtl = (aFrame->StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL);
+ if ((isBlock && rect.y < aPoint.y) ||
+ (!isBlock && ((isRtl && rect.x + rect.width / 2 > aPoint.x) ||
+ (!isRtl && rect.x + rect.width / 2 < aPoint.x)))) {
+ offsets.offset = range.end;
+ if (rect.Contains(aPoint))
+ offsets.secondaryOffset = range.start;
+ else
+ offsets.secondaryOffset = range.end;
+ } else {
+ offsets.offset = range.start;
+ if (rect.Contains(aPoint))
+ offsets.secondaryOffset = range.end;
+ else
+ offsets.secondaryOffset = range.start;
+ }
+ offsets.associate =
+ offsets.offset == range.start ? CARET_ASSOCIATE_AFTER : CARET_ASSOCIATE_BEFORE;
+ return offsets;
+}
+
+static nsIFrame* AdjustFrameForSelectionStyles(nsIFrame* aFrame) {
+ nsIFrame* adjustedFrame = aFrame;
+ for (nsIFrame* frame = aFrame; frame; frame = frame->GetParent())
+ {
+ // These are the conditions that make all children not able to handle
+ // a cursor.
+ StyleUserSelect userSelect = frame->StyleUIReset()->mUserSelect;
+ if (userSelect == StyleUserSelect::MozText) {
+ // If we see a -moz-text element, we shouldn't look further up the parent
+ // chain!
+ break;
+ }
+ if (userSelect == StyleUserSelect::All ||
+ frame->IsGeneratedContentFrame()) {
+ adjustedFrame = frame;
+ }
+ }
+ return adjustedFrame;
+}
+
+nsIFrame::ContentOffsets nsIFrame::GetContentOffsetsFromPoint(nsPoint aPoint,
+ uint32_t aFlags)
+{
+ nsIFrame *adjustedFrame;
+ if (aFlags & IGNORE_SELECTION_STYLE) {
+ adjustedFrame = this;
+ }
+ else {
+ // This section of code deals with special selection styles. Note that
+ // -moz-all exists, even though it doesn't need to be explicitly handled.
+ //
+ // The offset is forced not to end up in generated content; content offsets
+ // cannot represent content outside of the document's content tree.
+
+ adjustedFrame = AdjustFrameForSelectionStyles(this);
+
+ // -moz-user-select: all needs special handling, because clicking on it
+ // should lead to the whole frame being selected
+ if (adjustedFrame && adjustedFrame->StyleUIReset()->mUserSelect ==
+ StyleUserSelect::All) {
+ nsPoint adjustedPoint = aPoint + this->GetOffsetTo(adjustedFrame);
+ return OffsetsForSingleFrame(adjustedFrame, adjustedPoint);
+ }
+
+ // For other cases, try to find a closest frame starting from the parent of
+ // the unselectable frame
+ if (adjustedFrame != this)
+ adjustedFrame = adjustedFrame->GetParent();
+ }
+
+ nsPoint adjustedPoint = aPoint + this->GetOffsetTo(adjustedFrame);
+
+ FrameTarget closest =
+ GetSelectionClosestFrame(adjustedFrame, adjustedPoint, aFlags);
+
+ if (closest.emptyBlock) {
+ ContentOffsets offsets;
+ NS_ASSERTION(closest.frame,
+ "closest.frame must not be null when it's empty");
+ offsets.content = closest.frame->GetContent();
+ offsets.offset = 0;
+ offsets.secondaryOffset = 0;
+ offsets.associate = CARET_ASSOCIATE_AFTER;
+ return offsets;
+ }
+
+ // If the correct offset is at one end of a frame, use offset-based
+ // calculation method
+ if (closest.frameEdge) {
+ ContentOffsets offsets;
+ FrameContentRange range = GetRangeForFrame(closest.frame);
+ offsets.content = range.content;
+ if (closest.afterFrame)
+ offsets.offset = range.end;
+ else
+ offsets.offset = range.start;
+ offsets.secondaryOffset = offsets.offset;
+ offsets.associate = offsets.offset == range.start ?
+ CARET_ASSOCIATE_AFTER : CARET_ASSOCIATE_BEFORE;
+ return offsets;
+ }
+
+ nsPoint pt;
+ if (closest.frame != this) {
+ if (closest.frame->IsSVGText()) {
+ pt = nsLayoutUtils::TransformAncestorPointToFrame(closest.frame,
+ aPoint, this);
+ } else {
+ pt = aPoint - closest.frame->GetOffsetTo(this);
+ }
+ } else {
+ pt = aPoint;
+ }
+ return static_cast<nsFrame*>(closest.frame)->CalcContentOffsetsFromFramePoint(pt);
+
+ // XXX should I add some kind of offset standardization?
+ // consider <b>xxxxx</b><i>zzzzz</i>; should any click between the last
+ // x and first z put the cursor in the same logical position in addition
+ // to the same visual position?
+}
+
+nsIFrame::ContentOffsets nsFrame::CalcContentOffsetsFromFramePoint(nsPoint aPoint)
+{
+ return OffsetsForSingleFrame(this, aPoint);
+}
+
+void
+nsIFrame::AssociateImage(const nsStyleImage& aImage, nsPresContext* aPresContext)
+{
+ if (aImage.GetType() != eStyleImageType_Image) {
+ return;
+ }
+
+ imgRequestProxy* req = aImage.GetImageData();
+ if (!req) {
+ return;
+ }
+
+ mozilla::css::ImageLoader* loader =
+ aPresContext->Document()->StyleImageLoader();
+
+ // If this fails there's not much we can do ...
+ loader->AssociateRequestToFrame(req, this);
+}
+
+nsresult
+nsFrame::GetCursor(const nsPoint& aPoint,
+ nsIFrame::Cursor& aCursor)
+{
+ FillCursorInformationFromStyle(StyleUserInterface(), aCursor);
+ if (NS_STYLE_CURSOR_AUTO == aCursor.mCursor) {
+ // If this is editable, I-beam cursor is better for most elements.
+ aCursor.mCursor =
+ (mContent && mContent->IsEditable())
+ ? NS_STYLE_CURSOR_TEXT : NS_STYLE_CURSOR_DEFAULT;
+ }
+ if (NS_STYLE_CURSOR_TEXT == aCursor.mCursor &&
+ GetWritingMode().IsVertical()) {
+ // Per CSS UI spec, UA may treat value 'text' as
+ // 'vertical-text' for vertical text.
+ aCursor.mCursor = NS_STYLE_CURSOR_VERTICAL_TEXT;
+ }
+
+ return NS_OK;
+}
+
+// Resize and incremental reflow
+
+/* virtual */ void
+nsFrame::MarkIntrinsicISizesDirty()
+{
+ // This version is meant only for what used to be box-to-block adaptors.
+ // It should not be called by other derived classes.
+ if (::IsXULBoxWrapped(this)) {
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+
+ SizeNeedsRecalc(metrics->mPrefSize);
+ SizeNeedsRecalc(metrics->mMinSize);
+ SizeNeedsRecalc(metrics->mMaxSize);
+ SizeNeedsRecalc(metrics->mBlockPrefSize);
+ SizeNeedsRecalc(metrics->mBlockMinSize);
+ CoordNeedsRecalc(metrics->mFlex);
+ CoordNeedsRecalc(metrics->mAscent);
+ }
+
+ if (GetStateBits() & NS_FRAME_FONT_INFLATION_FLOW_ROOT) {
+ nsFontInflationData::MarkFontInflationDataTextDirty(this);
+ }
+}
+
+/* virtual */ nscoord
+nsFrame::GetMinISize(nsRenderingContext *aRenderingContext)
+{
+ nscoord result = 0;
+ DISPLAY_MIN_WIDTH(this, result);
+ return result;
+}
+
+/* virtual */ nscoord
+nsFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
+{
+ nscoord result = 0;
+ DISPLAY_PREF_WIDTH(this, result);
+ return result;
+}
+
+/* virtual */ void
+nsFrame::AddInlineMinISize(nsRenderingContext* aRenderingContext,
+ nsIFrame::InlineMinISizeData* aData)
+{
+ nscoord isize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
+ this, nsLayoutUtils::MIN_ISIZE);
+ aData->DefaultAddInlineMinISize(this, isize);
+}
+
+/* virtual */ void
+nsFrame::AddInlinePrefISize(nsRenderingContext* aRenderingContext,
+ nsIFrame::InlinePrefISizeData* aData)
+{
+ nscoord isize = nsLayoutUtils::IntrinsicForContainer(aRenderingContext,
+ this, nsLayoutUtils::PREF_ISIZE);
+ aData->DefaultAddInlinePrefISize(isize);
+}
+
+void
+nsIFrame::InlineMinISizeData::DefaultAddInlineMinISize(nsIFrame* aFrame,
+ nscoord aISize,
+ bool aAllowBreak)
+{
+ auto parent = aFrame->GetParent();
+ MOZ_ASSERT(parent, "Must have a parent if we get here!");
+ const bool mayBreak = aAllowBreak &&
+ !aFrame->CanContinueTextRun() &&
+ !parent->StyleContext()->ShouldSuppressLineBreak() &&
+ parent->StyleText()->WhiteSpaceCanWrap(parent);
+ if (mayBreak) {
+ OptionallyBreak();
+ }
+ mTrailingWhitespace = 0;
+ mSkipWhitespace = false;
+ mCurrentLine += aISize;
+ mAtStartOfLine = false;
+ if (mayBreak) {
+ OptionallyBreak();
+ }
+}
+
+void
+nsIFrame::InlinePrefISizeData::DefaultAddInlinePrefISize(nscoord aISize)
+{
+ mCurrentLine = NSCoordSaturatingAdd(mCurrentLine, aISize);
+ mTrailingWhitespace = 0;
+ mSkipWhitespace = false;
+}
+
+void
+nsIFrame::InlineMinISizeData::ForceBreak()
+{
+ mCurrentLine -= mTrailingWhitespace;
+ mPrevLines = std::max(mPrevLines, mCurrentLine);
+ mCurrentLine = mTrailingWhitespace = 0;
+
+ for (uint32_t i = 0, i_end = mFloats.Length(); i != i_end; ++i) {
+ nscoord float_min = mFloats[i].Width();
+ if (float_min > mPrevLines)
+ mPrevLines = float_min;
+ }
+ mFloats.Clear();
+ mSkipWhitespace = true;
+}
+
+void
+nsIFrame::InlineMinISizeData::OptionallyBreak(nscoord aHyphenWidth)
+{
+ // If we can fit more content into a smaller width by staying on this
+ // line (because we're still at a negative offset due to negative
+ // text-indent or negative margin), don't break. Otherwise, do the
+ // same as ForceBreak. it doesn't really matter when we accumulate
+ // floats.
+ if (mCurrentLine + aHyphenWidth < 0 || mAtStartOfLine)
+ return;
+ mCurrentLine += aHyphenWidth;
+ ForceBreak();
+}
+
+void
+nsIFrame::InlinePrefISizeData::ForceBreak()
+{
+ if (mFloats.Length() != 0) {
+ // preferred widths accumulated for floats that have already
+ // been cleared past
+ nscoord floats_done = 0,
+ // preferred widths accumulated for floats that have not yet
+ // been cleared past
+ floats_cur_left = 0,
+ floats_cur_right = 0;
+
+ for (uint32_t i = 0, i_end = mFloats.Length(); i != i_end; ++i) {
+ const FloatInfo& floatInfo = mFloats[i];
+ const nsStyleDisplay* floatDisp = floatInfo.Frame()->StyleDisplay();
+ StyleClear breakType = floatDisp->PhysicalBreakType(mLineContainerWM);
+ if (breakType == StyleClear::Left ||
+ breakType == StyleClear::Right ||
+ breakType == StyleClear::Both) {
+ nscoord floats_cur = NSCoordSaturatingAdd(floats_cur_left,
+ floats_cur_right);
+ if (floats_cur > floats_done) {
+ floats_done = floats_cur;
+ }
+ if (breakType != StyleClear::Right) {
+ floats_cur_left = 0;
+ }
+ if (breakType != StyleClear::Left) {
+ floats_cur_right = 0;
+ }
+ }
+
+ StyleFloat floatStyle = floatDisp->PhysicalFloats(mLineContainerWM);
+ nscoord& floats_cur =
+ floatStyle == StyleFloat::Left ? floats_cur_left : floats_cur_right;
+ nscoord floatWidth = floatInfo.Width();
+ // Negative-width floats don't change the available space so they
+ // shouldn't change our intrinsic line width either.
+ floats_cur =
+ NSCoordSaturatingAdd(floats_cur, std::max(0, floatWidth));
+ }
+
+ nscoord floats_cur =
+ NSCoordSaturatingAdd(floats_cur_left, floats_cur_right);
+ if (floats_cur > floats_done)
+ floats_done = floats_cur;
+
+ mCurrentLine = NSCoordSaturatingAdd(mCurrentLine, floats_done);
+
+ mFloats.Clear();
+ }
+
+ mCurrentLine =
+ NSCoordSaturatingSubtract(mCurrentLine, mTrailingWhitespace, nscoord_MAX);
+ mPrevLines = std::max(mPrevLines, mCurrentLine);
+ mCurrentLine = mTrailingWhitespace = 0;
+ mSkipWhitespace = true;
+}
+
+static void
+AddCoord(const nsStyleCoord& aStyle,
+ nsIFrame* aFrame,
+ nscoord* aCoord, float* aPercent,
+ bool aClampNegativeToZero)
+{
+ switch (aStyle.GetUnit()) {
+ case eStyleUnit_Coord: {
+ NS_ASSERTION(!aClampNegativeToZero || aStyle.GetCoordValue() >= 0,
+ "unexpected negative value");
+ *aCoord += aStyle.GetCoordValue();
+ return;
+ }
+ case eStyleUnit_Percent: {
+ NS_ASSERTION(!aClampNegativeToZero || aStyle.GetPercentValue() >= 0.0f,
+ "unexpected negative value");
+ *aPercent += aStyle.GetPercentValue();
+ return;
+ }
+ case eStyleUnit_Calc: {
+ const nsStyleCoord::Calc *calc = aStyle.GetCalcValue();
+ if (aClampNegativeToZero) {
+ // This is far from ideal when one is negative and one is positive.
+ *aCoord += std::max(calc->mLength, 0);
+ *aPercent += std::max(calc->mPercent, 0.0f);
+ } else {
+ *aCoord += calc->mLength;
+ *aPercent += calc->mPercent;
+ }
+ return;
+ }
+ default: {
+ return;
+ }
+ }
+}
+
+static nsIFrame::IntrinsicISizeOffsetData
+IntrinsicSizeOffsets(nsIFrame* aFrame, bool aForISize)
+{
+ nsIFrame::IntrinsicISizeOffsetData result;
+ WritingMode wm = aFrame->GetWritingMode();
+ const nsStyleMargin* styleMargin = aFrame->StyleMargin();
+ bool verticalAxis = aForISize == wm.IsVertical();
+ AddCoord(verticalAxis ? styleMargin->mMargin.GetTop()
+ : styleMargin->mMargin.GetLeft(),
+ aFrame, &result.hMargin, &result.hPctMargin,
+ false);
+ AddCoord(verticalAxis ? styleMargin->mMargin.GetBottom()
+ : styleMargin->mMargin.GetRight(),
+ aFrame, &result.hMargin, &result.hPctMargin,
+ false);
+
+ const nsStylePadding* stylePadding = aFrame->StylePadding();
+ AddCoord(verticalAxis ? stylePadding->mPadding.GetTop()
+ : stylePadding->mPadding.GetLeft(),
+ aFrame, &result.hPadding, &result.hPctPadding,
+ true);
+ AddCoord(verticalAxis ? stylePadding->mPadding.GetBottom()
+ : stylePadding->mPadding.GetRight(),
+ aFrame, &result.hPadding, &result.hPctPadding,
+ true);
+
+ const nsStyleBorder* styleBorder = aFrame->StyleBorder();
+ if (verticalAxis) {
+ result.hBorder += styleBorder->GetComputedBorderWidth(NS_SIDE_TOP);
+ result.hBorder += styleBorder->GetComputedBorderWidth(NS_SIDE_BOTTOM);
+ } else {
+ result.hBorder += styleBorder->GetComputedBorderWidth(NS_SIDE_LEFT);
+ result.hBorder += styleBorder->GetComputedBorderWidth(NS_SIDE_RIGHT);
+ }
+
+ const nsStyleDisplay* disp = aFrame->StyleDisplay();
+ if (aFrame->IsThemed(disp)) {
+ nsPresContext* presContext = aFrame->PresContext();
+
+ nsIntMargin border;
+ presContext->GetTheme()->GetWidgetBorder(presContext->DeviceContext(),
+ aFrame, disp->mAppearance,
+ &border);
+ result.hBorder =
+ presContext->DevPixelsToAppUnits(verticalAxis ? border.TopBottom()
+ : border.LeftRight());
+
+ nsIntMargin padding;
+ if (presContext->GetTheme()->GetWidgetPadding(presContext->DeviceContext(),
+ aFrame, disp->mAppearance,
+ &padding)) {
+ result.hPadding =
+ presContext->DevPixelsToAppUnits(verticalAxis ? padding.TopBottom()
+ : padding.LeftRight());
+ result.hPctPadding = 0;
+ }
+ }
+ return result;
+}
+
+/* virtual */ nsIFrame::IntrinsicISizeOffsetData
+nsFrame::IntrinsicISizeOffsets()
+{
+ return IntrinsicSizeOffsets(this, true);
+}
+
+nsIFrame::IntrinsicISizeOffsetData
+nsIFrame::IntrinsicBSizeOffsets()
+{
+ return IntrinsicSizeOffsets(this, false);
+}
+
+/* virtual */ IntrinsicSize
+nsFrame::GetIntrinsicSize()
+{
+ return IntrinsicSize(); // default is width/height set to eStyleUnit_None
+}
+
+/* virtual */ nsSize
+nsFrame::GetIntrinsicRatio()
+{
+ return nsSize(0, 0);
+}
+
+/* virtual */
+LogicalSize
+nsFrame::ComputeSize(nsRenderingContext* aRenderingContext,
+ WritingMode aWM,
+ const LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const LogicalSize& aMargin,
+ const LogicalSize& aBorder,
+ const LogicalSize& aPadding,
+ ComputeSizeFlags aFlags)
+{
+ MOZ_ASSERT(GetIntrinsicRatio() == nsSize(0,0),
+ "Please override this method and call "
+ "nsFrame::ComputeSizeWithIntrinsicDimensions instead.");
+ LogicalSize result = ComputeAutoSize(aRenderingContext, aWM,
+ aCBSize, aAvailableISize,
+ aMargin, aBorder, aPadding,
+ aFlags);
+ const nsStylePosition *stylePos = StylePosition();
+
+ LogicalSize boxSizingAdjust(aWM);
+ if (stylePos->mBoxSizing == StyleBoxSizing::Border) {
+ boxSizingAdjust = aBorder + aPadding;
+ }
+ nscoord boxSizingToMarginEdgeISize =
+ aMargin.ISize(aWM) + aBorder.ISize(aWM) + aPadding.ISize(aWM) -
+ boxSizingAdjust.ISize(aWM);
+
+ const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
+ const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);
+
+ nsIAtom* parentFrameType = GetParent() ? GetParent()->GetType() : nullptr;
+ auto alignCB = GetParent();
+ bool isGridItem = (parentFrameType == nsGkAtoms::gridContainerFrame &&
+ !(GetStateBits() & NS_FRAME_OUT_OF_FLOW));
+ if (parentFrameType == nsGkAtoms::tableWrapperFrame &&
+ GetType() == nsGkAtoms::tableFrame) {
+ // An inner table frame is sized as a grid item if its table wrapper is,
+ // because they actually have the same CB (the wrapper's CB).
+ // @see ReflowInput::InitCBReflowInput
+ auto tableWrapper = GetParent();
+ auto grandParent = tableWrapper->GetParent();
+ isGridItem = (grandParent->GetType() == nsGkAtoms::gridContainerFrame &&
+ !(tableWrapper->GetStateBits() & NS_FRAME_OUT_OF_FLOW));
+ if (isGridItem) {
+ // When resolving justify/align-self below, we want to use the grid
+ // container's justify/align-items value and WritingMode.
+ alignCB = grandParent;
+ }
+ }
+ bool isFlexItem = (parentFrameType == nsGkAtoms::flexContainerFrame &&
+ !(GetStateBits() & NS_FRAME_OUT_OF_FLOW));
+ bool isInlineFlexItem = false;
+ if (isFlexItem) {
+ // Flex items use their "flex-basis" property in place of their main-size
+ // property (e.g. "width") for sizing purposes, *unless* they have
+ // "flex-basis:auto", in which case they use their main-size property after
+ // all.
+ uint32_t flexDirection = GetParent()->StylePosition()->mFlexDirection;
+ isInlineFlexItem =
+ flexDirection == NS_STYLE_FLEX_DIRECTION_ROW ||
+ flexDirection == NS_STYLE_FLEX_DIRECTION_ROW_REVERSE;
+
+ // NOTE: The logic here should match the similar chunk for determining
+ // inlineStyleCoord and blockStyleCoord in
+ // nsFrame::ComputeSizeWithIntrinsicDimensions().
+ const nsStyleCoord* flexBasis = &(stylePos->mFlexBasis);
+ if (flexBasis->GetUnit() != eStyleUnit_Auto) {
+ if (isInlineFlexItem) {
+ inlineStyleCoord = flexBasis;
+ } else {
+ // One caveat for vertical flex items: We don't support enumerated
+ // values (e.g. "max-content") for height properties yet. So, if our
+ // computed flex-basis is an enumerated value, we'll just behave as if
+ // it were "auto", which means "use the main-size property after all"
+ // (which is "height", in this case).
+ // NOTE: Once we support intrinsic sizing keywords for "height",
+ // we should remove this check.
+ if (flexBasis->GetUnit() != eStyleUnit_Enumerated) {
+ blockStyleCoord = flexBasis;
+ }
+ }
+ }
+ }
+
+ // Compute inline-axis size
+
+ if (inlineStyleCoord->GetUnit() != eStyleUnit_Auto) {
+ result.ISize(aWM) =
+ ComputeISizeValue(aRenderingContext, aCBSize.ISize(aWM),
+ boxSizingAdjust.ISize(aWM), boxSizingToMarginEdgeISize,
+ *inlineStyleCoord, aFlags);
+ } else if (MOZ_UNLIKELY(isGridItem) &&
+ !IS_TRUE_OVERFLOW_CONTAINER(this)) {
+ // 'auto' inline-size for grid-level box - fill the CB for 'stretch' /
+ // 'normal' and clamp it to the CB if requested:
+ bool stretch = false;
+ if (!(aFlags & nsIFrame::eShrinkWrap) &&
+ !StyleMargin()->HasInlineAxisAuto(aWM)) {
+ auto inlineAxisAlignment =
+ aWM.IsOrthogonalTo(alignCB->GetWritingMode()) ?
+ StylePosition()->UsedAlignSelf(alignCB->StyleContext()) :
+ StylePosition()->UsedJustifySelf(alignCB->StyleContext());
+ stretch = inlineAxisAlignment == NS_STYLE_ALIGN_NORMAL ||
+ inlineAxisAlignment == NS_STYLE_ALIGN_STRETCH;
+ }
+ if (stretch || (aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize)) {
+ auto iSizeToFillCB = std::max(nscoord(0), aCBSize.ISize(aWM) -
+ aPadding.ISize(aWM) -
+ aBorder.ISize(aWM) -
+ aMargin.ISize(aWM));
+ if (stretch || result.ISize(aWM) > iSizeToFillCB) {
+ result.ISize(aWM) = iSizeToFillCB;
+ }
+ }
+ }
+
+ // Flex items ignore their min & max sizing properties in their
+ // flex container's main-axis. (Those properties get applied later in
+ // the flexbox algorithm.)
+ const nsStyleCoord& maxISizeCoord = stylePos->MaxISize(aWM);
+ nscoord maxISize = NS_UNCONSTRAINEDSIZE;
+ if (maxISizeCoord.GetUnit() != eStyleUnit_None &&
+ !(isFlexItem && isInlineFlexItem)) {
+ maxISize =
+ ComputeISizeValue(aRenderingContext, aCBSize.ISize(aWM),
+ boxSizingAdjust.ISize(aWM), boxSizingToMarginEdgeISize,
+ maxISizeCoord, aFlags);
+ result.ISize(aWM) = std::min(maxISize, result.ISize(aWM));
+ }
+
+ const nsStyleCoord& minISizeCoord = stylePos->MinISize(aWM);
+ nscoord minISize;
+ if (minISizeCoord.GetUnit() != eStyleUnit_Auto &&
+ !(isFlexItem && isInlineFlexItem)) {
+ minISize =
+ ComputeISizeValue(aRenderingContext, aCBSize.ISize(aWM),
+ boxSizingAdjust.ISize(aWM), boxSizingToMarginEdgeISize,
+ minISizeCoord, aFlags);
+ } else if (MOZ_UNLIKELY(isGridItem)) {
+ // This implements "Implied Minimum Size of Grid Items".
+ // https://drafts.csswg.org/css-grid/#min-size-auto
+ minISize = std::min(maxISize, GetMinISize(aRenderingContext));
+ if (inlineStyleCoord->IsCoordPercentCalcUnit()) {
+ minISize = std::min(minISize, result.ISize(aWM));
+ } else if (aFlags & eIClampMarginBoxMinSize) {
+ // "if the grid item spans only grid tracks that have a fixed max track
+ // sizing function, its automatic minimum size in that dimension is
+ // further clamped to less than or equal to the size necessary to fit
+ // its margin box within the resulting grid area (flooring at zero)"
+ // https://drafts.csswg.org/css-grid/#min-size-auto
+ auto maxMinISize = std::max(nscoord(0), aCBSize.ISize(aWM) -
+ aPadding.ISize(aWM) -
+ aBorder.ISize(aWM) -
+ aMargin.ISize(aWM));
+ minISize = std::min(minISize, maxMinISize);
+ }
+ } else {
+ // Treat "min-width: auto" as 0.
+ // NOTE: Technically, "auto" is supposed to behave like "min-content" on
+ // flex items. However, we don't need to worry about that here, because
+ // flex items' min-sizes are intentionally ignored until the flex
+ // container explicitly considers them during space distribution.
+ minISize = 0;
+ }
+ result.ISize(aWM) = std::max(minISize, result.ISize(aWM));
+
+ // Compute block-axis size
+ // (but not if we have auto bsize or if we recieved the "eUseAutoBSize"
+ // flag -- then, we'll just stick with the bsize that we already calculated
+ // in the initial ComputeAutoSize() call.)
+ if (!(aFlags & nsIFrame::eUseAutoBSize)) {
+ if (!nsLayoutUtils::IsAutoBSize(*blockStyleCoord, aCBSize.BSize(aWM))) {
+ result.BSize(aWM) =
+ nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM),
+ *blockStyleCoord);
+ } else if (MOZ_UNLIKELY(isGridItem) &&
+ blockStyleCoord->GetUnit() == eStyleUnit_Auto &&
+ !IS_TRUE_OVERFLOW_CONTAINER(this)) {
+ auto cbSize = aCBSize.BSize(aWM);
+ if (cbSize != NS_AUTOHEIGHT) {
+ // 'auto' block-size for grid-level box - fill the CB for 'stretch' /
+ // 'normal' and clamp it to the CB if requested:
+ bool stretch = false;
+ if (!StyleMargin()->HasBlockAxisAuto(aWM)) {
+ auto blockAxisAlignment =
+ !aWM.IsOrthogonalTo(alignCB->GetWritingMode()) ?
+ StylePosition()->UsedAlignSelf(alignCB->StyleContext()) :
+ StylePosition()->UsedJustifySelf(alignCB->StyleContext());
+ stretch = blockAxisAlignment == NS_STYLE_ALIGN_NORMAL ||
+ blockAxisAlignment == NS_STYLE_ALIGN_STRETCH;
+ }
+ if (stretch || (aFlags & ComputeSizeFlags::eBClampMarginBoxMinSize)) {
+ auto bSizeToFillCB = std::max(nscoord(0), cbSize -
+ aPadding.BSize(aWM) -
+ aBorder.BSize(aWM) -
+ aMargin.BSize(aWM));
+ if (stretch || (result.BSize(aWM) != NS_AUTOHEIGHT &&
+ result.BSize(aWM) > bSizeToFillCB)) {
+ result.BSize(aWM) = bSizeToFillCB;
+ }
+ }
+ }
+ }
+ }
+
+ const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(aWM);
+
+ if (result.BSize(aWM) != NS_UNCONSTRAINEDSIZE) {
+ if (!nsLayoutUtils::IsAutoBSize(maxBSizeCoord, aCBSize.BSize(aWM)) &&
+ !(isFlexItem && !isInlineFlexItem)) {
+ nscoord maxBSize =
+ nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM),
+ maxBSizeCoord);
+ result.BSize(aWM) = std::min(maxBSize, result.BSize(aWM));
+ }
+
+ const nsStyleCoord& minBSizeCoord = stylePos->MinBSize(aWM);
+
+ if (!nsLayoutUtils::IsAutoBSize(minBSizeCoord, aCBSize.BSize(aWM)) &&
+ !(isFlexItem && !isInlineFlexItem)) {
+ nscoord minBSize =
+ nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM),
+ minBSizeCoord);
+ result.BSize(aWM) = std::max(minBSize, result.BSize(aWM));
+ }
+ }
+
+ const nsStyleDisplay *disp = StyleDisplay();
+ if (IsThemed(disp)) {
+ LayoutDeviceIntSize widget;
+ bool canOverride = true;
+ nsPresContext *presContext = PresContext();
+ presContext->GetTheme()->
+ GetMinimumWidgetSize(presContext, this, disp->mAppearance,
+ &widget, &canOverride);
+
+ // Convert themed widget's physical dimensions to logical coords
+ LogicalSize size(aWM,
+ nsSize(presContext->DevPixelsToAppUnits(widget.width),
+ presContext->DevPixelsToAppUnits(widget.height)));
+
+ // GMWS() returns border-box; we need content-box
+ size.ISize(aWM) -= aBorder.ISize(aWM) + aPadding.ISize(aWM);
+ size.BSize(aWM) -= aBorder.BSize(aWM) + aPadding.BSize(aWM);
+
+ if (size.BSize(aWM) > result.BSize(aWM) || !canOverride) {
+ result.BSize(aWM) = size.BSize(aWM);
+ }
+ if (size.ISize(aWM) > result.ISize(aWM) || !canOverride) {
+ result.ISize(aWM) = size.ISize(aWM);
+ }
+ }
+
+ result.ISize(aWM) = std::max(0, result.ISize(aWM));
+ result.BSize(aWM) = std::max(0, result.BSize(aWM));
+
+ return result;
+}
+
+LogicalSize
+nsFrame::ComputeSizeWithIntrinsicDimensions(nsRenderingContext* aRenderingContext,
+ WritingMode aWM,
+ const IntrinsicSize& aIntrinsicSize,
+ nsSize aIntrinsicRatio,
+ const LogicalSize& aCBSize,
+ const LogicalSize& aMargin,
+ const LogicalSize& aBorder,
+ const LogicalSize& aPadding,
+ ComputeSizeFlags aFlags)
+{
+ const nsStylePosition* stylePos = StylePosition();
+ const nsStyleCoord* inlineStyleCoord = &stylePos->ISize(aWM);
+ const nsStyleCoord* blockStyleCoord = &stylePos->BSize(aWM);
+ const nsIAtom* parentFrameType =
+ GetParent() ? GetParent()->GetType() : nullptr;
+ const bool isGridItem = (parentFrameType == nsGkAtoms::gridContainerFrame &&
+ !(GetStateBits() & NS_FRAME_OUT_OF_FLOW));
+ const bool isFlexItem = (parentFrameType == nsGkAtoms::flexContainerFrame &&
+ !(GetStateBits() & NS_FRAME_OUT_OF_FLOW));
+ bool isInlineFlexItem = false;
+ Maybe<nsStyleCoord> imposedMainSizeStyleCoord;
+
+ // If this is a flex item, and we're measuring its cross size after flexing
+ // to resolve its main size, then we need to use the resolved main size
+ // that the container provides to us *instead of* the main-size coordinate
+ // from our style struct. (Otherwise, we'll be using an irrelevant value in
+ // the aspect-ratio calculations below.)
+ if (isFlexItem) {
+ uint32_t flexDirection =
+ GetParent()->StylePosition()->mFlexDirection;
+ isInlineFlexItem =
+ flexDirection == NS_STYLE_FLEX_DIRECTION_ROW ||
+ flexDirection == NS_STYLE_FLEX_DIRECTION_ROW_REVERSE;
+
+ // If FlexItemMainSizeOverride frame-property is set, then that means the
+ // flex container is imposing a main-size on this flex item for it to use
+ // as its size in the container's main axis.
+ FrameProperties props = Properties();
+ bool didImposeMainSize;
+ nscoord imposedMainSize =
+ props.Get(nsIFrame::FlexItemMainSizeOverride(), &didImposeMainSize);
+ if (didImposeMainSize) {
+ imposedMainSizeStyleCoord.emplace(imposedMainSize,
+ nsStyleCoord::CoordConstructor);
+ if (isInlineFlexItem) {
+ inlineStyleCoord = imposedMainSizeStyleCoord.ptr();
+ } else {
+ blockStyleCoord = imposedMainSizeStyleCoord.ptr();
+ }
+
+ } else {
+ // Flex items use their "flex-basis" property in place of their main-size
+ // property (e.g. "width") for sizing purposes, *unless* they have
+ // "flex-basis:auto", in which case they use their main-size property
+ // after all.
+ // NOTE: The logic here should match the similar chunk for determining
+ // inlineStyleCoord and blockStyleCoord in nsFrame::ComputeSize().
+ const nsStyleCoord* flexBasis = &(stylePos->mFlexBasis);
+ if (flexBasis->GetUnit() != eStyleUnit_Auto) {
+ if (isInlineFlexItem) {
+ inlineStyleCoord = flexBasis;
+ } else {
+ // One caveat for vertical flex items: We don't support enumerated
+ // values (e.g. "max-content") for height properties yet. So, if our
+ // computed flex-basis is an enumerated value, we'll just behave as if
+ // it were "auto", which means "use the main-size property after all"
+ // (which is "height", in this case).
+ // NOTE: Once we support intrinsic sizing keywords for "height",
+ // we should remove this check.
+ if (flexBasis->GetUnit() != eStyleUnit_Enumerated) {
+ blockStyleCoord = flexBasis;
+ }
+ }
+ }
+ }
+ }
+
+ // Handle intrinsic sizes and their interaction with
+ // {min-,max-,}{width,height} according to the rules in
+ // http://www.w3.org/TR/CSS21/visudet.html#min-max-widths
+
+ // Note: throughout the following section of the function, I avoid
+ // a * (b / c) because of its reduced accuracy relative to a * b / c
+ // or (a * b) / c (which are equivalent).
+
+ const bool isAutoISize = inlineStyleCoord->GetUnit() == eStyleUnit_Auto;
+ const bool isAutoBSize =
+ nsLayoutUtils::IsAutoBSize(*blockStyleCoord, aCBSize.BSize(aWM));
+
+ LogicalSize boxSizingAdjust(aWM);
+ if (stylePos->mBoxSizing == StyleBoxSizing::Border) {
+ boxSizingAdjust = aBorder + aPadding;
+ }
+ nscoord boxSizingToMarginEdgeISize =
+ aMargin.ISize(aWM) + aBorder.ISize(aWM) + aPadding.ISize(aWM) -
+ boxSizingAdjust.ISize(aWM);
+
+ nscoord iSize, minISize, maxISize, bSize, minBSize, maxBSize;
+ enum class Stretch {
+ // stretch to fill the CB (preserving intrinsic ratio) in the relevant axis
+ eStretchPreservingRatio,
+ // stretch to fill the CB in the relevant axis
+ eStretch,
+ // no stretching in the relevant axis
+ eNoStretch,
+ };
+ // just to avoid having to type these out everywhere:
+ const auto eStretchPreservingRatio = Stretch::eStretchPreservingRatio;
+ const auto eStretch = Stretch::eStretch;
+ const auto eNoStretch = Stretch::eNoStretch;
+
+ Stretch stretchI = eNoStretch; // stretch behavior in the inline axis
+ Stretch stretchB = eNoStretch; // stretch behavior in the block axis
+
+ if (!isAutoISize) {
+ iSize = ComputeISizeValue(aRenderingContext,
+ aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
+ boxSizingToMarginEdgeISize, *inlineStyleCoord, aFlags);
+ } else if (MOZ_UNLIKELY(isGridItem)) {
+ MOZ_ASSERT(!IS_TRUE_OVERFLOW_CONTAINER(this));
+ // 'auto' inline-size for grid-level box - apply 'stretch' as needed:
+ auto cbSize = aCBSize.ISize(aWM);
+ if (cbSize != NS_UNCONSTRAINEDSIZE) {
+ if (!StyleMargin()->HasInlineAxisAuto(aWM)) {
+ auto inlineAxisAlignment =
+ aWM.IsOrthogonalTo(GetParent()->GetWritingMode()) ?
+ stylePos->UsedAlignSelf(GetParent()->StyleContext()) :
+ stylePos->UsedJustifySelf(GetParent()->StyleContext());
+ if (inlineAxisAlignment == NS_STYLE_ALIGN_NORMAL) {
+ stretchI = eStretchPreservingRatio;
+ } else if (inlineAxisAlignment == NS_STYLE_ALIGN_STRETCH) {
+ stretchI = eStretch;
+ }
+ }
+ if (stretchI != eNoStretch ||
+ (aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize)) {
+ iSize = std::max(nscoord(0), cbSize -
+ aPadding.ISize(aWM) -
+ aBorder.ISize(aWM) -
+ aMargin.ISize(aWM));
+ }
+ } else {
+ // Reset this flag to avoid applying the clamping below.
+ aFlags = ComputeSizeFlags(aFlags &
+ ~ComputeSizeFlags::eIClampMarginBoxMinSize);
+ }
+ }
+
+ const nsStyleCoord& maxISizeCoord = stylePos->MaxISize(aWM);
+
+ if (maxISizeCoord.GetUnit() != eStyleUnit_None &&
+ !(isFlexItem && isInlineFlexItem)) {
+ maxISize = ComputeISizeValue(aRenderingContext,
+ aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
+ boxSizingToMarginEdgeISize, maxISizeCoord, aFlags);
+ } else {
+ maxISize = nscoord_MAX;
+ }
+
+ // NOTE: Flex items ignore their min & max sizing properties in their
+ // flex container's main-axis. (Those properties get applied later in
+ // the flexbox algorithm.)
+
+ const nsStyleCoord& minISizeCoord = stylePos->MinISize(aWM);
+
+ if (minISizeCoord.GetUnit() != eStyleUnit_Auto &&
+ !(isFlexItem && isInlineFlexItem)) {
+ minISize = ComputeISizeValue(aRenderingContext,
+ aCBSize.ISize(aWM), boxSizingAdjust.ISize(aWM),
+ boxSizingToMarginEdgeISize, minISizeCoord, aFlags);
+ } else {
+ // Treat "min-width: auto" as 0.
+ // NOTE: Technically, "auto" is supposed to behave like "min-content" on
+ // flex items. However, we don't need to worry about that here, because
+ // flex items' min-sizes are intentionally ignored until the flex
+ // container explicitly considers them during space distribution.
+ minISize = 0;
+ }
+
+ if (!isAutoBSize) {
+ bSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM),
+ *blockStyleCoord);
+ } else if (MOZ_UNLIKELY(isGridItem)) {
+ MOZ_ASSERT(!IS_TRUE_OVERFLOW_CONTAINER(this));
+ // 'auto' block-size for grid-level box - apply 'stretch' as needed:
+ auto cbSize = aCBSize.BSize(aWM);
+ if (cbSize != NS_AUTOHEIGHT) {
+ if (!StyleMargin()->HasBlockAxisAuto(aWM)) {
+ auto blockAxisAlignment =
+ !aWM.IsOrthogonalTo(GetParent()->GetWritingMode()) ?
+ stylePos->UsedAlignSelf(GetParent()->StyleContext()) :
+ stylePos->UsedJustifySelf(GetParent()->StyleContext());
+ if (blockAxisAlignment == NS_STYLE_ALIGN_NORMAL) {
+ stretchB = eStretchPreservingRatio;
+ } else if (blockAxisAlignment == NS_STYLE_ALIGN_STRETCH) {
+ stretchB = eStretch;
+ }
+ }
+ if (stretchB != eNoStretch ||
+ (aFlags & ComputeSizeFlags::eBClampMarginBoxMinSize)) {
+ bSize = std::max(nscoord(0), cbSize -
+ aPadding.BSize(aWM) -
+ aBorder.BSize(aWM) -
+ aMargin.BSize(aWM));
+ }
+ } else {
+ // Reset this flag to avoid applying the clamping below.
+ aFlags = ComputeSizeFlags(aFlags &
+ ~ComputeSizeFlags::eBClampMarginBoxMinSize);
+ }
+ }
+
+ const nsStyleCoord& maxBSizeCoord = stylePos->MaxBSize(aWM);
+
+ if (!nsLayoutUtils::IsAutoBSize(maxBSizeCoord, aCBSize.BSize(aWM)) &&
+ !(isFlexItem && !isInlineFlexItem)) {
+ maxBSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM), maxBSizeCoord);
+ } else {
+ maxBSize = nscoord_MAX;
+ }
+
+ const nsStyleCoord& minBSizeCoord = stylePos->MinBSize(aWM);
+
+ if (!nsLayoutUtils::IsAutoBSize(minBSizeCoord, aCBSize.BSize(aWM)) &&
+ !(isFlexItem && !isInlineFlexItem)) {
+ minBSize = nsLayoutUtils::ComputeBSizeValue(aCBSize.BSize(aWM),
+ boxSizingAdjust.BSize(aWM), minBSizeCoord);
+ } else {
+ minBSize = 0;
+ }
+
+ // Resolve percentage intrinsic iSize/bSize as necessary:
+
+ NS_ASSERTION(aCBSize.ISize(aWM) != NS_UNCONSTRAINEDSIZE,
+ "Our containing block must not have unconstrained inline-size!");
+
+ const bool isVertical = aWM.IsVertical();
+ const nsStyleCoord& isizeCoord =
+ isVertical ? aIntrinsicSize.height : aIntrinsicSize.width;
+ const nsStyleCoord& bsizeCoord =
+ isVertical ? aIntrinsicSize.width : aIntrinsicSize.height;
+
+ bool hasIntrinsicISize, hasIntrinsicBSize;
+ nscoord intrinsicISize, intrinsicBSize;
+
+ if (isizeCoord.GetUnit() == eStyleUnit_Coord) {
+ hasIntrinsicISize = true;
+ intrinsicISize = isizeCoord.GetCoordValue();
+ if (intrinsicISize < 0)
+ intrinsicISize = 0;
+ } else {
+ NS_ASSERTION(isizeCoord.GetUnit() == eStyleUnit_None,
+ "unexpected unit");
+ hasIntrinsicISize = false;
+ intrinsicISize = 0;
+ }
+
+ if (bsizeCoord.GetUnit() == eStyleUnit_Coord) {
+ hasIntrinsicBSize = true;
+ intrinsicBSize = bsizeCoord.GetCoordValue();
+ if (intrinsicBSize < 0)
+ intrinsicBSize = 0;
+ } else {
+ NS_ASSERTION(bsizeCoord.GetUnit() == eStyleUnit_None,
+ "unexpected unit");
+ hasIntrinsicBSize = false;
+ intrinsicBSize = 0;
+ }
+
+ NS_ASSERTION(aIntrinsicRatio.width >= 0 && aIntrinsicRatio.height >= 0,
+ "Intrinsic ratio has a negative component!");
+ LogicalSize logicalRatio(aWM, aIntrinsicRatio);
+
+ // Now calculate the used values for iSize and bSize:
+
+ if (isAutoISize) {
+ if (isAutoBSize) {
+
+ // 'auto' iSize, 'auto' bSize
+
+ // Get tentative values - CSS 2.1 sections 10.3.2 and 10.6.2:
+
+ nscoord tentISize, tentBSize;
+
+ if (hasIntrinsicISize) {
+ tentISize = intrinsicISize;
+ } else if (hasIntrinsicBSize && logicalRatio.BSize(aWM) > 0) {
+ tentISize = NSCoordMulDiv(intrinsicBSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
+ } else if (logicalRatio.ISize(aWM) > 0) {
+ tentISize = aCBSize.ISize(aWM) - boxSizingToMarginEdgeISize; // XXX scrollbar?
+ if (tentISize < 0) tentISize = 0;
+ } else {
+ tentISize = nsPresContext::CSSPixelsToAppUnits(300);
+ }
+
+ // If we need to clamp the inline size to fit the CB, we use the 'stretch'
+ // or 'normal' codepath. We use the ratio-preserving 'normal' codepath
+ // unless we have 'stretch' in the other axis.
+ if ((aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize) &&
+ stretchI != eStretch && tentISize > iSize) {
+ stretchI = (stretchB == eStretch ? eStretch : eStretchPreservingRatio);
+ }
+
+ if (hasIntrinsicBSize) {
+ tentBSize = intrinsicBSize;
+ } else if (logicalRatio.ISize(aWM) > 0) {
+ tentBSize = NSCoordMulDiv(tentISize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
+ } else {
+ tentBSize = nsPresContext::CSSPixelsToAppUnits(150);
+ }
+
+ // (ditto the comment about clamping the inline size above)
+ if ((aFlags & ComputeSizeFlags::eBClampMarginBoxMinSize) &&
+ stretchB != eStretch && tentBSize > bSize) {
+ stretchB = (stretchI == eStretch ? eStretch : eStretchPreservingRatio);
+ }
+
+ if (aIntrinsicRatio != nsSize(0, 0)) {
+ if (stretchI == eStretch) {
+ tentISize = iSize; // * / 'stretch'
+ if (stretchB == eStretch) {
+ tentBSize = bSize; // 'stretch' / 'stretch'
+ } else if (stretchB == eStretchPreservingRatio && logicalRatio.ISize(aWM) > 0) {
+ // 'normal' / 'stretch'
+ tentBSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
+ }
+ } else if (stretchB == eStretch) {
+ tentBSize = bSize; // 'stretch' / * (except 'stretch')
+ if (stretchI == eStretchPreservingRatio && logicalRatio.BSize(aWM) > 0) {
+ // 'stretch' / 'normal'
+ tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
+ }
+ } else if (stretchI == eStretchPreservingRatio) {
+ tentISize = iSize; // * (except 'stretch') / 'normal'
+ if (logicalRatio.ISize(aWM) > 0) {
+ tentBSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
+ }
+ if (stretchB == eStretchPreservingRatio && tentBSize > bSize) {
+ // Stretch within the CB size with preserved intrinsic ratio.
+ tentBSize = bSize; // 'normal' / 'normal'
+ if (logicalRatio.BSize(aWM) > 0) {
+ tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
+ }
+ }
+ } else if (stretchB == eStretchPreservingRatio) {
+ tentBSize = bSize; // 'normal' / * (except 'normal' and 'stretch')
+ if (logicalRatio.BSize(aWM) > 0) {
+ tentISize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
+ }
+ }
+ }
+
+ // ComputeAutoSizeWithIntrinsicDimensions preserves the ratio when applying
+ // the min/max-size. We don't want that when we have 'stretch' in either
+ // axis because tentISize/tentBSize is likely not according to ratio now.
+ if (aIntrinsicRatio != nsSize(0, 0) &&
+ stretchI != eStretch && stretchB != eStretch) {
+ nsSize autoSize = nsLayoutUtils::
+ ComputeAutoSizeWithIntrinsicDimensions(minISize, minBSize,
+ maxISize, maxBSize,
+ tentISize, tentBSize);
+ // The nsSize that ComputeAutoSizeWithIntrinsicDimensions returns will
+ // actually contain logical values if the parameters passed to it were
+ // logical coordinates, so we do NOT perform a physical-to-logical
+ // conversion here, but just assign the fields directly to our result.
+ iSize = autoSize.width;
+ bSize = autoSize.height;
+ } else {
+ // Not honoring an intrinsic ratio: clamp the dimensions independently.
+ iSize = NS_CSS_MINMAX(tentISize, minISize, maxISize);
+ bSize = NS_CSS_MINMAX(tentBSize, minBSize, maxBSize);
+ }
+ } else {
+
+ // 'auto' iSize, non-'auto' bSize
+ bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
+ if (stretchI != eStretch) {
+ if (logicalRatio.BSize(aWM) > 0) {
+ iSize = NSCoordMulDiv(bSize, logicalRatio.ISize(aWM), logicalRatio.BSize(aWM));
+ } else if (hasIntrinsicISize) {
+ if (!((aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize) &&
+ intrinsicISize > iSize)) {
+ iSize = intrinsicISize;
+ } // else - leave iSize as is to fill the CB
+ } else {
+ iSize = nsPresContext::CSSPixelsToAppUnits(300);
+ }
+ } // else - leave iSize as is to fill the CB
+ iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
+
+ }
+ } else {
+ if (isAutoBSize) {
+
+ // non-'auto' iSize, 'auto' bSize
+ iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
+ if (stretchB != eStretch) {
+ if (logicalRatio.ISize(aWM) > 0) {
+ bSize = NSCoordMulDiv(iSize, logicalRatio.BSize(aWM), logicalRatio.ISize(aWM));
+ } else if (hasIntrinsicBSize) {
+ if (!((aFlags & ComputeSizeFlags::eBClampMarginBoxMinSize) &&
+ intrinsicBSize > bSize)) {
+ bSize = intrinsicBSize;
+ } // else - leave bSize as is to fill the CB
+ } else {
+ bSize = nsPresContext::CSSPixelsToAppUnits(150);
+ }
+ } // else - leave bSize as is to fill the CB
+ bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
+
+ } else {
+
+ // non-'auto' iSize, non-'auto' bSize
+ iSize = NS_CSS_MINMAX(iSize, minISize, maxISize);
+ bSize = NS_CSS_MINMAX(bSize, minBSize, maxBSize);
+
+ }
+ }
+
+ return LogicalSize(aWM, iSize, bSize);
+}
+
+nsRect
+nsIFrame::ComputeTightBounds(DrawTarget* aDrawTarget) const
+{
+ return GetVisualOverflowRect();
+}
+
+nsRect
+nsFrame::ComputeSimpleTightBounds(DrawTarget* aDrawTarget) const
+{
+ if (StyleOutline()->mOutlineStyle != NS_STYLE_BORDER_STYLE_NONE ||
+ StyleBorder()->HasBorder() || !StyleBackground()->IsTransparent() ||
+ StyleDisplay()->mAppearance) {
+ // Not necessarily tight, due to clipping, negative
+ // outline-offset, and lots of other issues, but that's OK
+ return GetVisualOverflowRect();
+ }
+
+ nsRect r(0, 0, 0, 0);
+ ChildListIterator lists(this);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ nsIFrame* child = childFrames.get();
+ r.UnionRect(r, child->ComputeTightBounds(aDrawTarget) + child->GetPosition());
+ }
+ }
+ return r;
+}
+
+/* virtual */ nsresult
+nsIFrame::GetPrefWidthTightBounds(nsRenderingContext* aContext,
+ nscoord* aX,
+ nscoord* aXMost)
+{
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+/* virtual */
+LogicalSize
+nsFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
+ WritingMode aWM,
+ const mozilla::LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const mozilla::LogicalSize& aMargin,
+ const mozilla::LogicalSize& aBorder,
+ const mozilla::LogicalSize& aPadding,
+ ComputeSizeFlags aFlags)
+{
+ // Use basic shrink-wrapping as a default implementation.
+ LogicalSize result(aWM, 0xdeadbeef, NS_UNCONSTRAINEDSIZE);
+
+ // don't bother setting it if the result won't be used
+ if (StylePosition()->ISize(aWM).GetUnit() == eStyleUnit_Auto) {
+ nscoord availBased = aAvailableISize - aMargin.ISize(aWM) -
+ aBorder.ISize(aWM) - aPadding.ISize(aWM);
+ result.ISize(aWM) = ShrinkWidthToFit(aRenderingContext, availBased, aFlags);
+ }
+ return result;
+}
+
+nscoord
+nsFrame::ShrinkWidthToFit(nsRenderingContext* aRenderingContext,
+ nscoord aISizeInCB,
+ ComputeSizeFlags aFlags)
+{
+ // If we're a container for font size inflation, then shrink
+ // wrapping inside of us should not apply font size inflation.
+ AutoMaybeDisableFontInflation an(this);
+
+ nscoord result;
+ nscoord minISize = GetMinISize(aRenderingContext);
+ if (minISize > aISizeInCB) {
+ const bool clamp = aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize;
+ result = MOZ_UNLIKELY(clamp) ? aISizeInCB : minISize;
+ } else {
+ nscoord prefISize = GetPrefISize(aRenderingContext);
+ if (prefISize > aISizeInCB) {
+ result = aISizeInCB;
+ } else {
+ result = prefISize;
+ }
+ }
+ return result;
+}
+
+nscoord
+nsIFrame::ComputeISizeValue(nsRenderingContext* aRenderingContext,
+ nscoord aContainingBlockISize,
+ nscoord aContentEdgeToBoxSizing,
+ nscoord aBoxSizingToMarginEdge,
+ const nsStyleCoord& aCoord,
+ ComputeSizeFlags aFlags)
+{
+ NS_PRECONDITION(aRenderingContext, "non-null rendering context expected");
+ LAYOUT_WARN_IF_FALSE(aContainingBlockISize != NS_UNCONSTRAINEDSIZE,
+ "have unconstrained inline-size; this should only result from "
+ "very large sizes, not attempts at intrinsic inline-size "
+ "calculation");
+ NS_PRECONDITION(aContainingBlockISize >= 0,
+ "inline-size less than zero");
+
+ nscoord result;
+ if (aCoord.IsCoordPercentCalcUnit()) {
+ result = nsRuleNode::ComputeCoordPercentCalc(aCoord,
+ aContainingBlockISize);
+ // The result of a calc() expression might be less than 0; we
+ // should clamp at runtime (below). (Percentages and coords that
+ // are less than 0 have already been dropped by the parser.)
+ result -= aContentEdgeToBoxSizing;
+ } else {
+ MOZ_ASSERT(eStyleUnit_Enumerated == aCoord.GetUnit());
+ // If 'this' is a container for font size inflation, then shrink
+ // wrapping inside of it should not apply font size inflation.
+ AutoMaybeDisableFontInflation an(this);
+
+ int32_t val = aCoord.GetIntValue();
+ switch (val) {
+ case NS_STYLE_WIDTH_MAX_CONTENT:
+ result = GetPrefISize(aRenderingContext);
+ NS_ASSERTION(result >= 0, "inline-size less than zero");
+ break;
+ case NS_STYLE_WIDTH_MIN_CONTENT:
+ result = GetMinISize(aRenderingContext);
+ NS_ASSERTION(result >= 0, "inline-size less than zero");
+ if (MOZ_UNLIKELY(aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize)) {
+ auto available = aContainingBlockISize -
+ (aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
+ result = std::min(available, result);
+ }
+ break;
+ case NS_STYLE_WIDTH_FIT_CONTENT:
+ {
+ nscoord pref = GetPrefISize(aRenderingContext),
+ min = GetMinISize(aRenderingContext),
+ fill = aContainingBlockISize -
+ (aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
+ if (MOZ_UNLIKELY(aFlags & ComputeSizeFlags::eIClampMarginBoxMinSize)) {
+ min = std::min(min, fill);
+ }
+ result = std::max(min, std::min(pref, fill));
+ NS_ASSERTION(result >= 0, "inline-size less than zero");
+ }
+ break;
+ case NS_STYLE_WIDTH_AVAILABLE:
+ result = aContainingBlockISize -
+ (aBoxSizingToMarginEdge + aContentEdgeToBoxSizing);
+ }
+ }
+
+ return std::max(0, result);
+}
+
+void
+nsFrame::DidReflow(nsPresContext* aPresContext,
+ const ReflowInput* aReflowInput,
+ nsDidReflowStatus aStatus)
+{
+ NS_FRAME_TRACE_MSG(NS_FRAME_TRACE_CALLS,
+ ("nsFrame::DidReflow: aStatus=%d", static_cast<uint32_t>(aStatus)));
+
+ nsSVGEffects::InvalidateDirectRenderingObservers(this, nsSVGEffects::INVALIDATE_REFLOW);
+
+ if (nsDidReflowStatus::FINISHED == aStatus) {
+ mState &= ~(NS_FRAME_IN_REFLOW | NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
+ NS_FRAME_HAS_DIRTY_CHILDREN);
+ }
+
+ // Notify the percent bsize observer if there is a percent bsize.
+ // The observer may be able to initiate another reflow with a computed
+ // bsize. This happens in the case where a table cell has no computed
+ // bsize but can fabricate one when the cell bsize is known.
+ if (aReflowInput && aReflowInput->mPercentBSizeObserver &&
+ !GetPrevInFlow()) {
+ const nsStyleCoord &bsize =
+ aReflowInput->mStylePosition->BSize(aReflowInput->GetWritingMode());
+ if (bsize.HasPercent()) {
+ aReflowInput->mPercentBSizeObserver->NotifyPercentBSize(*aReflowInput);
+ }
+ }
+
+ aPresContext->ReflowedFrame();
+}
+
+void
+nsFrame::FinishReflowWithAbsoluteFrames(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus,
+ bool aConstrainBSize)
+{
+ ReflowAbsoluteFrames(aPresContext, aDesiredSize, aReflowInput, aStatus, aConstrainBSize);
+
+ FinishAndStoreOverflow(&aDesiredSize);
+}
+
+void
+nsFrame::ReflowAbsoluteFrames(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus,
+ bool aConstrainBSize)
+{
+ if (HasAbsolutelyPositionedChildren()) {
+ nsAbsoluteContainingBlock* absoluteContainer = GetAbsoluteContainingBlock();
+
+ // Let the absolutely positioned container reflow any absolutely positioned
+ // child frames that need to be reflowed
+
+ // The containing block for the abs pos kids is formed by our padding edge.
+ nsMargin usedBorder = GetUsedBorder();
+ nscoord containingBlockWidth =
+ std::max(0, aDesiredSize.Width() - usedBorder.LeftRight());
+ nscoord containingBlockHeight =
+ std::max(0, aDesiredSize.Height() - usedBorder.TopBottom());
+ nsContainerFrame* container = do_QueryFrame(this);
+ NS_ASSERTION(container, "Abs-pos children only supported on container frames for now");
+
+ nsRect containingBlock(0, 0, containingBlockWidth, containingBlockHeight);
+ AbsPosReflowFlags flags =
+ AbsPosReflowFlags::eCBWidthAndHeightChanged; // XXX could be optimized
+ if (aConstrainBSize) {
+ flags |= AbsPosReflowFlags::eConstrainHeight;
+ }
+ absoluteContainer->Reflow(container, aPresContext, aReflowInput, aStatus,
+ containingBlock, flags,
+ &aDesiredSize.mOverflowAreas);
+ }
+}
+
+void
+nsFrame::PushDirtyBitToAbsoluteFrames()
+{
+ if (!(GetStateBits() & NS_FRAME_IS_DIRTY)) {
+ return; // No dirty bit to push.
+ }
+ if (!HasAbsolutelyPositionedChildren()) {
+ return; // No absolute children to push to.
+ }
+ GetAbsoluteContainingBlock()->MarkAllFramesDirty();
+}
+
+/* virtual */ bool
+nsFrame::CanContinueTextRun() const
+{
+ // By default, a frame will *not* allow a text run to be continued
+ // through it.
+ return false;
+}
+
+void
+nsFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus)
+{
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsFrame");
+ aDesiredSize.ClearSize();
+ aStatus = NS_FRAME_COMPLETE;
+ NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
+}
+
+nsresult
+nsFrame::CharacterDataChanged(CharacterDataChangeInfo* aInfo)
+{
+ NS_NOTREACHED("should only be called for text frames");
+ return NS_OK;
+}
+
+nsresult
+nsFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ return NS_OK;
+}
+
+// Flow member functions
+
+nsSplittableType
+nsFrame::GetSplittableType() const
+{
+ return NS_FRAME_NOT_SPLITTABLE;
+}
+
+nsIFrame* nsFrame::GetPrevContinuation() const
+{
+ return nullptr;
+}
+
+void
+nsFrame::SetPrevContinuation(nsIFrame* aPrevContinuation)
+{
+ MOZ_ASSERT(false, "not splittable");
+}
+
+nsIFrame* nsFrame::GetNextContinuation() const
+{
+ return nullptr;
+}
+
+void
+nsFrame::SetNextContinuation(nsIFrame*)
+{
+ MOZ_ASSERT(false, "not splittable");
+}
+
+nsIFrame* nsFrame::GetPrevInFlowVirtual() const
+{
+ return nullptr;
+}
+
+void
+nsFrame::SetPrevInFlow(nsIFrame* aPrevInFlow)
+{
+ MOZ_ASSERT(false, "not splittable");
+}
+
+nsIFrame* nsFrame::GetNextInFlowVirtual() const
+{
+ return nullptr;
+}
+
+void
+nsFrame::SetNextInFlow(nsIFrame*)
+{
+ MOZ_ASSERT(false, "not splittable");
+}
+
+nsIFrame* nsIFrame::GetTailContinuation()
+{
+ nsIFrame* frame = this;
+ while (frame->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
+ frame = frame->GetPrevContinuation();
+ NS_ASSERTION(frame, "first continuation can't be overflow container");
+ }
+ for (nsIFrame* next = frame->GetNextContinuation();
+ next && !(next->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER);
+ next = frame->GetNextContinuation()) {
+ frame = next;
+ }
+ NS_POSTCONDITION(frame, "illegal state in continuation chain.");
+ return frame;
+}
+
+NS_DECLARE_FRAME_PROPERTY_WITHOUT_DTOR(ViewProperty, nsView)
+
+// Associated view object
+nsView*
+nsIFrame::GetView() const
+{
+ // Check the frame state bit and see if the frame has a view
+ if (!(GetStateBits() & NS_FRAME_HAS_VIEW))
+ return nullptr;
+
+ // Check for a property on the frame
+ nsView* value = Properties().Get(ViewProperty());
+ NS_ASSERTION(value, "frame state bit was set but frame has no view");
+ return value;
+}
+
+nsresult
+nsIFrame::SetView(nsView* aView)
+{
+ if (aView) {
+ aView->SetFrame(this);
+
+#ifdef DEBUG
+ nsIAtom* frameType = GetType();
+ NS_ASSERTION(frameType == nsGkAtoms::scrollFrame ||
+ frameType == nsGkAtoms::subDocumentFrame ||
+ frameType == nsGkAtoms::listControlFrame ||
+ frameType == nsGkAtoms::objectFrame ||
+ frameType == nsGkAtoms::viewportFrame ||
+ frameType == nsGkAtoms::menuPopupFrame,
+ "Only specific frame types can have an nsView");
+#endif
+
+ // Set a property on the frame
+ Properties().Set(ViewProperty(), aView);
+
+ // Set the frame state bit that says the frame has a view
+ AddStateBits(NS_FRAME_HAS_VIEW);
+
+ // Let all of the ancestors know they have a descendant with a view.
+ for (nsIFrame* f = GetParent();
+ f && !(f->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW);
+ f = f->GetParent())
+ f->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW);
+ }
+
+ return NS_OK;
+}
+
+// Find the first geometric parent that has a view
+nsIFrame* nsIFrame::GetAncestorWithView() const
+{
+ for (nsIFrame* f = GetParent(); nullptr != f; f = f->GetParent()) {
+ if (f->HasView()) {
+ return f;
+ }
+ }
+ return nullptr;
+}
+
+nsPoint nsIFrame::GetOffsetTo(const nsIFrame* aOther) const
+{
+ NS_PRECONDITION(aOther,
+ "Must have frame for destination coordinate system!");
+
+ NS_ASSERTION(PresContext() == aOther->PresContext(),
+ "GetOffsetTo called on frames in different documents");
+
+ nsPoint offset(0, 0);
+ const nsIFrame* f;
+ for (f = this; f != aOther && f; f = f->GetParent()) {
+ offset += f->GetPosition();
+ }
+
+ if (f != aOther) {
+ // Looks like aOther wasn't an ancestor of |this|. So now we have
+ // the root-frame-relative position of |this| in |offset|. Convert back
+ // to the coordinates of aOther
+ while (aOther) {
+ offset -= aOther->GetPosition();
+ aOther = aOther->GetParent();
+ }
+ }
+
+ return offset;
+}
+
+nsPoint nsIFrame::GetOffsetToCrossDoc(const nsIFrame* aOther) const
+{
+ return GetOffsetToCrossDoc(aOther, PresContext()->AppUnitsPerDevPixel());
+}
+
+nsPoint
+nsIFrame::GetOffsetToCrossDoc(const nsIFrame* aOther, const int32_t aAPD) const
+{
+ NS_PRECONDITION(aOther,
+ "Must have frame for destination coordinate system!");
+ NS_ASSERTION(PresContext()->GetRootPresContext() ==
+ aOther->PresContext()->GetRootPresContext(),
+ "trying to get the offset between frames in different document "
+ "hierarchies?");
+ if (PresContext()->GetRootPresContext() !=
+ aOther->PresContext()->GetRootPresContext()) {
+ // crash right away, we are almost certainly going to crash anyway.
+ NS_RUNTIMEABORT("trying to get the offset between frames in different "
+ "document hierarchies?");
+ }
+
+ const nsIFrame* root = nullptr;
+ // offset will hold the final offset
+ // docOffset holds the currently accumulated offset at the current APD, it
+ // will be converted and added to offset when the current APD changes.
+ nsPoint offset(0, 0), docOffset(0, 0);
+ const nsIFrame* f = this;
+ int32_t currAPD = PresContext()->AppUnitsPerDevPixel();
+ while (f && f != aOther) {
+ docOffset += f->GetPosition();
+ nsIFrame* parent = f->GetParent();
+ if (parent) {
+ f = parent;
+ } else {
+ nsPoint newOffset(0, 0);
+ root = f;
+ f = nsLayoutUtils::GetCrossDocParentFrame(f, &newOffset);
+ int32_t newAPD = f ? f->PresContext()->AppUnitsPerDevPixel() : 0;
+ if (!f || newAPD != currAPD) {
+ // Convert docOffset to the right APD and add it to offset.
+ offset += docOffset.ScaleToOtherAppUnits(currAPD, aAPD);
+ docOffset.x = docOffset.y = 0;
+ }
+ currAPD = newAPD;
+ docOffset += newOffset;
+ }
+ }
+ if (f == aOther) {
+ offset += docOffset.ScaleToOtherAppUnits(currAPD, aAPD);
+ } else {
+ // Looks like aOther wasn't an ancestor of |this|. So now we have
+ // the root-document-relative position of |this| in |offset|. Subtract the
+ // root-document-relative position of |aOther| from |offset|.
+ // This call won't try to recurse again because root is an ancestor of
+ // aOther.
+ nsPoint negOffset = aOther->GetOffsetToCrossDoc(root, aAPD);
+ offset -= negOffset;
+ }
+
+ return offset;
+}
+
+nsIntRect nsIFrame::GetScreenRect() const
+{
+ return GetScreenRectInAppUnits().ToNearestPixels(PresContext()->AppUnitsPerCSSPixel());
+}
+
+nsRect nsIFrame::GetScreenRectInAppUnits() const
+{
+ nsPresContext* presContext = PresContext();
+ nsIFrame* rootFrame =
+ presContext->PresShell()->FrameManager()->GetRootFrame();
+ nsPoint rootScreenPos(0, 0);
+ nsPoint rootFrameOffsetInParent(0, 0);
+ nsIFrame* rootFrameParent =
+ nsLayoutUtils::GetCrossDocParentFrame(rootFrame, &rootFrameOffsetInParent);
+ if (rootFrameParent) {
+ nsRect parentScreenRectAppUnits = rootFrameParent->GetScreenRectInAppUnits();
+ nsPresContext* parentPresContext = rootFrameParent->PresContext();
+ double parentScale = double(presContext->AppUnitsPerDevPixel())/
+ parentPresContext->AppUnitsPerDevPixel();
+ nsPoint rootPt = parentScreenRectAppUnits.TopLeft() + rootFrameOffsetInParent;
+ rootScreenPos.x = NS_round(parentScale*rootPt.x);
+ rootScreenPos.y = NS_round(parentScale*rootPt.y);
+ } else {
+ nsCOMPtr<nsIWidget> rootWidget;
+ presContext->PresShell()->GetViewManager()->GetRootWidget(getter_AddRefs(rootWidget));
+ if (rootWidget) {
+ LayoutDeviceIntPoint rootDevPx = rootWidget->WidgetToScreenOffset();
+ rootScreenPos.x = presContext->DevPixelsToAppUnits(rootDevPx.x);
+ rootScreenPos.y = presContext->DevPixelsToAppUnits(rootDevPx.y);
+ }
+ }
+
+ return nsRect(rootScreenPos + GetOffsetTo(rootFrame), GetSize());
+}
+
+// Returns the offset from this frame to the closest geometric parent that
+// has a view. Also returns the containing view or null in case of error
+void
+nsIFrame::GetOffsetFromView(nsPoint& aOffset, nsView** aView) const
+{
+ NS_PRECONDITION(nullptr != aView, "null OUT parameter pointer");
+ nsIFrame* frame = const_cast<nsIFrame*>(this);
+
+ *aView = nullptr;
+ aOffset.MoveTo(0, 0);
+ do {
+ aOffset += frame->GetPosition();
+ frame = frame->GetParent();
+ } while (frame && !frame->HasView());
+
+ if (frame) {
+ *aView = frame->GetView();
+ }
+}
+
+nsIWidget*
+nsIFrame::GetNearestWidget() const
+{
+ return GetClosestView()->GetNearestWidget(nullptr);
+}
+
+nsIWidget*
+nsIFrame::GetNearestWidget(nsPoint& aOffset) const
+{
+ nsPoint offsetToView;
+ nsPoint offsetToWidget;
+ nsIWidget* widget =
+ GetClosestView(&offsetToView)->GetNearestWidget(&offsetToWidget);
+ aOffset = offsetToView + offsetToWidget;
+ return widget;
+}
+
+nsIAtom*
+nsFrame::GetType() const
+{
+ return nullptr;
+}
+
+bool
+nsIFrame::IsLeaf() const
+{
+ return true;
+}
+
+Matrix4x4
+nsIFrame::GetTransformMatrix(const nsIFrame* aStopAtAncestor,
+ nsIFrame** aOutAncestor)
+{
+ NS_PRECONDITION(aOutAncestor, "Need a place to put the ancestor!");
+
+ /* If we're transformed, we want to hand back the combination
+ * transform/translate matrix that will apply our current transform, then
+ * shift us to our parent.
+ */
+ if (IsTransformed()) {
+ /* Compute the delta to the parent, which we need because we are converting
+ * coordinates to our parent.
+ */
+ NS_ASSERTION(nsLayoutUtils::GetCrossDocParentFrame(this),
+ "Cannot transform the viewport frame!");
+ int32_t scaleFactor = PresContext()->AppUnitsPerDevPixel();
+
+ Matrix4x4 result = nsDisplayTransform::GetResultingTransformMatrix(this,
+ nsPoint(0,0), scaleFactor,
+ nsDisplayTransform::INCLUDE_PERSPECTIVE|nsDisplayTransform::OFFSET_BY_ORIGIN,
+ nullptr);
+ *aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(this);
+ nsPoint delta = GetOffsetToCrossDoc(*aOutAncestor);
+ /* Combine the raw transform with a translation to our parent. */
+ result.PostTranslate(NSAppUnitsToFloatPixels(delta.x, scaleFactor),
+ NSAppUnitsToFloatPixels(delta.y, scaleFactor),
+ 0.0f);
+
+ return result;
+ }
+
+ if (nsLayoutUtils::IsPopup(this) &&
+ GetType() == nsGkAtoms::listControlFrame) {
+ nsPresContext* presContext = PresContext();
+ nsIFrame* docRootFrame = presContext->PresShell()->GetRootFrame();
+
+ // Compute a matrix that transforms from the popup widget to the toplevel
+ // widget. We use the widgets because they're the simplest and most
+ // accurate approach --- this should work no matter how the widget position
+ // was chosen.
+ nsIWidget* widget = GetView()->GetWidget();
+ nsPresContext* rootPresContext = PresContext()->GetRootPresContext();
+ // Maybe the widget hasn't been created yet? Popups without widgets are
+ // treated as regular frames. That should work since they'll be rendered
+ // as part of the page if they're rendered at all.
+ if (widget && rootPresContext) {
+ nsIWidget* toplevel = rootPresContext->GetNearestWidget();
+ if (toplevel) {
+ LayoutDeviceIntRect screenBounds = widget->GetClientBounds();
+ LayoutDeviceIntRect toplevelScreenBounds = toplevel->GetClientBounds();
+ LayoutDeviceIntPoint translation =
+ screenBounds.TopLeft() - toplevelScreenBounds.TopLeft();
+
+ Matrix4x4 transformToTop;
+ transformToTop._41 = translation.x;
+ transformToTop._42 = translation.y;
+
+ *aOutAncestor = docRootFrame;
+ Matrix4x4 docRootTransformToTop =
+ nsLayoutUtils::GetTransformToAncestor(docRootFrame, nullptr);
+ if (docRootTransformToTop.IsSingular()) {
+ NS_WARNING("Containing document is invisible, we can't compute a valid transform");
+ } else {
+ docRootTransformToTop.Invert();
+ return transformToTop * docRootTransformToTop;
+ }
+ }
+ }
+ }
+
+ *aOutAncestor = nsLayoutUtils::GetCrossDocParentFrame(this);
+
+ /* Otherwise, we're not transformed. In that case, we'll walk up the frame
+ * tree until we either hit the root frame or something that may be
+ * transformed. We'll then change coordinates into that frame, since we're
+ * guaranteed that nothing in-between can be transformed. First, however,
+ * we have to check to see if we have a parent. If not, we'll set the
+ * outparam to null (indicating that there's nothing left) and will hand back
+ * the identity matrix.
+ */
+ if (!*aOutAncestor)
+ return Matrix4x4();
+
+ /* Keep iterating while the frame can't possibly be transformed. */
+ while (!(*aOutAncestor)->IsTransformed() &&
+ !nsLayoutUtils::IsPopup(*aOutAncestor) &&
+ *aOutAncestor != aStopAtAncestor) {
+ /* If no parent, stop iterating. Otherwise, update the ancestor. */
+ nsIFrame* parent = nsLayoutUtils::GetCrossDocParentFrame(*aOutAncestor);
+ if (!parent)
+ break;
+
+ *aOutAncestor = parent;
+ }
+
+ NS_ASSERTION(*aOutAncestor, "Somehow ended up with a null ancestor...?");
+
+ /* Translate from this frame to our ancestor, if it exists. That's the
+ * entire transform, so we're done.
+ */
+ nsPoint delta = GetOffsetToCrossDoc(*aOutAncestor);
+ int32_t scaleFactor = PresContext()->AppUnitsPerDevPixel();
+ return Matrix4x4::Translation(NSAppUnitsToFloatPixels(delta.x, scaleFactor),
+ NSAppUnitsToFloatPixels(delta.y, scaleFactor),
+ 0.0f);
+}
+
+static void InvalidateRenderingObservers(nsIFrame* aFrame)
+{
+ nsSVGEffects::InvalidateDirectRenderingObservers(aFrame);
+ nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
+ nsIFrame* parent = aFrame;
+ while (parent != displayRoot &&
+ (parent = nsLayoutUtils::GetCrossDocParentFrame(parent)) &&
+ !parent->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT)) {
+ nsSVGEffects::InvalidateDirectRenderingObservers(parent);
+ }
+}
+
+void
+SchedulePaintInternal(nsIFrame* aFrame, nsIFrame::PaintType aType = nsIFrame::PAINT_DEFAULT)
+{
+ nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
+ nsPresContext* pres = displayRoot->PresContext()->GetRootPresContext();
+
+ // No need to schedule a paint for an external document since they aren't
+ // painted directly.
+ if (!pres || (pres->Document() && pres->Document()->IsResourceDoc())) {
+ return;
+ }
+ if (!pres->GetContainerWeak()) {
+ NS_WARNING("Shouldn't call SchedulePaint in a detached pres context");
+ return;
+ }
+
+ pres->PresShell()->ScheduleViewManagerFlush(aType == nsIFrame::PAINT_DELAYED_COMPRESS ?
+ nsIPresShell::PAINT_DELAYED_COMPRESS :
+ nsIPresShell::PAINT_DEFAULT);
+
+ if (aType == nsIFrame::PAINT_DELAYED_COMPRESS) {
+ return;
+ }
+
+ if (aType == nsIFrame::PAINT_DEFAULT) {
+ displayRoot->AddStateBits(NS_FRAME_UPDATE_LAYER_TREE);
+ }
+ nsIPresShell* shell = aFrame->PresContext()->PresShell();
+ if (shell) {
+ shell->AddInvalidateHiddenPresShellObserver(pres->RefreshDriver());
+ }
+}
+
+static void InvalidateFrameInternal(nsIFrame *aFrame, bool aHasDisplayItem = true)
+{
+ if (aHasDisplayItem) {
+ aFrame->AddStateBits(NS_FRAME_NEEDS_PAINT);
+ }
+ nsSVGEffects::InvalidateDirectRenderingObservers(aFrame);
+ bool needsSchedulePaint = false;
+ if (nsLayoutUtils::IsPopup(aFrame)) {
+ needsSchedulePaint = true;
+ } else {
+ nsIFrame *parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
+ while (parent && !parent->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT)) {
+ if (aHasDisplayItem && !parent->HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
+ parent->AddStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT);
+ }
+ nsSVGEffects::InvalidateDirectRenderingObservers(parent);
+
+ // If we're inside a popup, then we need to make sure that we
+ // call schedule paint so that the NS_FRAME_UPDATE_LAYER_TREE
+ // flag gets added to the popup display root frame.
+ if (nsLayoutUtils::IsPopup(parent)) {
+ needsSchedulePaint = true;
+ break;
+ }
+ parent = nsLayoutUtils::GetCrossDocParentFrame(parent);
+ }
+ if (!parent) {
+ needsSchedulePaint = true;
+ }
+ }
+ if (!aHasDisplayItem) {
+ return;
+ }
+ if (needsSchedulePaint) {
+ SchedulePaintInternal(aFrame);
+ }
+ if (aFrame->HasAnyStateBits(NS_FRAME_HAS_INVALID_RECT)) {
+ aFrame->Properties().Delete(nsIFrame::InvalidationRect());
+ aFrame->RemoveStateBits(NS_FRAME_HAS_INVALID_RECT);
+ }
+}
+
+void
+nsIFrame::InvalidateFrameSubtree(uint32_t aDisplayItemKey)
+{
+ bool hasDisplayItem =
+ !aDisplayItemKey || FrameLayerBuilder::HasRetainedDataFor(this, aDisplayItemKey);
+ InvalidateFrame(aDisplayItemKey);
+
+ if (HasAnyStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT) || !hasDisplayItem) {
+ return;
+ }
+
+ AddStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT);
+
+ AutoTArray<nsIFrame::ChildList,4> childListArray;
+ GetCrossDocChildLists(&childListArray);
+
+ nsIFrame::ChildListArrayIterator lists(childListArray);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ childFrames.get()->InvalidateFrameSubtree();
+ }
+ }
+}
+
+void
+nsIFrame::ClearInvalidationStateBits()
+{
+ if (HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT)) {
+ AutoTArray<nsIFrame::ChildList,4> childListArray;
+ GetCrossDocChildLists(&childListArray);
+
+ nsIFrame::ChildListArrayIterator lists(childListArray);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ childFrames.get()->ClearInvalidationStateBits();
+ }
+ }
+ }
+
+ RemoveStateBits(NS_FRAME_NEEDS_PAINT |
+ NS_FRAME_DESCENDANT_NEEDS_PAINT |
+ NS_FRAME_ALL_DESCENDANTS_NEED_PAINT);
+}
+
+void
+nsIFrame::InvalidateFrame(uint32_t aDisplayItemKey)
+{
+ bool hasDisplayItem =
+ !aDisplayItemKey || FrameLayerBuilder::HasRetainedDataFor(this, aDisplayItemKey);
+ InvalidateFrameInternal(this, hasDisplayItem);
+}
+
+void
+nsIFrame::InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey)
+{
+ bool hasDisplayItem =
+ !aDisplayItemKey || FrameLayerBuilder::HasRetainedDataFor(this, aDisplayItemKey);
+ bool alreadyInvalid = false;
+ if (!HasAnyStateBits(NS_FRAME_NEEDS_PAINT)) {
+ InvalidateFrameInternal(this, hasDisplayItem);
+ } else {
+ alreadyInvalid = true;
+ }
+
+ if (!hasDisplayItem) {
+ return;
+ }
+
+ nsRect* rect = Properties().Get(InvalidationRect());
+ if (!rect) {
+ if (alreadyInvalid) {
+ return;
+ }
+ rect = new nsRect();
+ Properties().Set(InvalidationRect(), rect);
+ AddStateBits(NS_FRAME_HAS_INVALID_RECT);
+ }
+
+ *rect = rect->Union(aRect);
+}
+
+/*static*/ uint8_t nsIFrame::sLayerIsPrerenderedDataKey;
+
+static bool
+DoesLayerHaveOutOfDateFrameMetrics(Layer* aLayer)
+{
+ for (uint32_t i = 0; i < aLayer->GetScrollMetadataCount(); i++) {
+ const FrameMetrics& metrics = aLayer->GetFrameMetrics(i);
+ if (!metrics.IsScrollable()) {
+ continue;
+ }
+ nsIScrollableFrame* scrollableFrame =
+ nsLayoutUtils::FindScrollableFrameFor(metrics.GetScrollId());
+ if (!scrollableFrame) {
+ // This shouldn't happen, so let's do the safe thing and trigger a full
+ // paint if it does.
+ return true;
+ }
+ nsPoint scrollPosition = scrollableFrame->GetScrollPosition();
+ if (metrics.GetScrollOffset() != CSSPoint::FromAppUnits(scrollPosition)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+static bool
+DoesLayerOrAncestorsHaveOutOfDateFrameMetrics(Layer* aLayer)
+{
+ for (Layer* layer = aLayer; layer; layer = layer->GetParent()) {
+ if (DoesLayerHaveOutOfDateFrameMetrics(layer)) {
+ return true;
+ }
+ }
+ return false;
+}
+
+bool
+nsIFrame::TryUpdateTransformOnly(Layer** aLayerResult)
+{
+ Layer* layer = FrameLayerBuilder::GetDedicatedLayer(
+ this, nsDisplayItem::TYPE_TRANSFORM);
+ if (!layer || !layer->HasUserData(LayerIsPrerenderedDataKey())) {
+ // If this layer isn't prerendered or we clip composites to our OS
+ // window, then we can't correctly optimize to an empty
+ // transaction in general.
+ return false;
+ }
+
+ if (DoesLayerOrAncestorsHaveOutOfDateFrameMetrics(layer)) {
+ // At least one scroll frame that can affect the position of this layer
+ // has changed its scroll offset since the last paint. Schedule a full
+ // paint to make sure that this layer's transform and all the frame
+ // metrics that affect it are in sync.
+ return false;
+ }
+
+ gfx::Matrix4x4 transform3d;
+ if (!nsLayoutUtils::GetLayerTransformForFrame(this, &transform3d)) {
+ // We're not able to compute a layer transform that we know would
+ // be used at the next layers transaction, so we can't only update
+ // the transform and will need to schedule an invalidating paint.
+ return false;
+ }
+ gfx::Matrix transform;
+ gfx::Matrix previousTransform;
+ // FIXME/bug 796690 and 796705: in general, changes to 3D
+ // transforms, or transform changes to properties other than
+ // translation, may lead us to choose a different rendering
+ // resolution for our layer. So if the transform is 3D or has a
+ // non-translation change, bail and schedule an invalidating paint.
+ // (We can often do better than this, for example for scale-down
+ // changes.)
+ static const gfx::Float kError = 0.0001f;
+ if (!transform3d.Is2D(&transform) ||
+ !layer->GetBaseTransform().Is2D(&previousTransform) ||
+ !gfx::FuzzyEqual(transform._11, previousTransform._11, kError) ||
+ !gfx::FuzzyEqual(transform._22, previousTransform._22, kError) ||
+ !gfx::FuzzyEqual(transform._21, previousTransform._21, kError) ||
+ !gfx::FuzzyEqual(transform._12, previousTransform._12, kError)) {
+ return false;
+ }
+ layer->SetBaseTransformForNextTransaction(transform3d);
+ *aLayerResult = layer;
+ return true;
+}
+
+bool
+nsIFrame::IsInvalid(nsRect& aRect)
+{
+ if (!HasAnyStateBits(NS_FRAME_NEEDS_PAINT)) {
+ return false;
+ }
+
+ if (HasAnyStateBits(NS_FRAME_HAS_INVALID_RECT)) {
+ nsRect* rect = Properties().Get(InvalidationRect());
+ NS_ASSERTION(rect, "Must have an invalid rect if NS_FRAME_HAS_INVALID_RECT is set!");
+ aRect = *rect;
+ } else {
+ aRect.SetEmpty();
+ }
+ return true;
+}
+
+void
+nsIFrame::SchedulePaint(PaintType aType)
+{
+ InvalidateRenderingObservers(this);
+ SchedulePaintInternal(this, aType);
+}
+
+Layer*
+nsIFrame::InvalidateLayer(uint32_t aDisplayItemKey,
+ const nsIntRect* aDamageRect,
+ const nsRect* aFrameDamageRect,
+ uint32_t aFlags /* = 0 */)
+{
+ NS_ASSERTION(aDisplayItemKey > 0, "Need a key");
+
+ Layer* layer = FrameLayerBuilder::GetDedicatedLayer(this, aDisplayItemKey);
+
+ InvalidateRenderingObservers(this);
+
+ // If the layer is being updated asynchronously, and it's being forwarded
+ // to a compositor, then we don't need to invalidate.
+ if ((aFlags & UPDATE_IS_ASYNC) && layer &&
+ layer->Manager()->GetBackendType() == LayersBackend::LAYERS_CLIENT) {
+ return layer;
+ }
+
+ if (!layer) {
+ if (aFrameDamageRect && aFrameDamageRect->IsEmpty()) {
+ return nullptr;
+ }
+
+ // Plugins can transition from not rendering anything to rendering,
+ // and still only call this. So always invalidate, with specifying
+ // the display item type just in case.
+ //
+ // In the bug 930056, dialer app startup but not shown on the
+ // screen because sometimes we don't have any retainned data
+ // for remote type displayitem and thus Repaint event is not
+ // triggered. So, always invalidate here as well.
+ uint32_t displayItemKey = aDisplayItemKey;
+ if (aDisplayItemKey == nsDisplayItem::TYPE_PLUGIN ||
+ aDisplayItemKey == nsDisplayItem::TYPE_REMOTE) {
+ displayItemKey = 0;
+ }
+
+ if (aFrameDamageRect) {
+ InvalidateFrameWithRect(*aFrameDamageRect, displayItemKey);
+ } else {
+ InvalidateFrame(displayItemKey);
+ }
+
+ return nullptr;
+ }
+
+ if (aDamageRect && aDamageRect->IsEmpty()) {
+ return layer;
+ }
+
+ if (aDamageRect) {
+ layer->AddInvalidRect(*aDamageRect);
+ } else {
+ layer->SetInvalidRectToVisibleRegion();
+ }
+
+ SchedulePaintInternal(this, PAINT_COMPOSITE_ONLY);
+ return layer;
+}
+
+static nsRect
+ComputeEffectsRect(nsIFrame* aFrame, const nsRect& aOverflowRect,
+ const nsSize& aNewSize)
+{
+ nsRect r = aOverflowRect;
+
+ if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
+ // For SVG frames, we only need to account for filters.
+ // TODO: We could also take account of clipPath and mask to reduce the
+ // visual overflow, but that's not essential.
+ if (aFrame->StyleEffects()->HasFilters()) {
+ aFrame->Properties().
+ Set(nsIFrame::PreEffectsBBoxProperty(), new nsRect(r));
+ r = nsSVGUtils::GetPostFilterVisualOverflowRect(aFrame, aOverflowRect);
+ }
+ return r;
+ }
+
+ // box-shadow
+ r.UnionRect(r, nsLayoutUtils::GetBoxShadowRectForFrame(aFrame, aNewSize));
+
+ // border-image-outset.
+ // We need to include border-image-outset because it can cause the
+ // border image to be drawn beyond the border box.
+
+ // (1) It's important we not check whether there's a border-image
+ // since the style hint for a change in border image doesn't cause
+ // reflow, and that's probably more important than optimizing the
+ // overflow areas for the silly case of border-image-outset without
+ // border-image
+ // (2) It's important that we not check whether the border-image
+ // is actually loaded, since that would require us to reflow when
+ // the image loads.
+ const nsStyleBorder* styleBorder = aFrame->StyleBorder();
+ nsMargin outsetMargin = styleBorder->GetImageOutset();
+
+ if (outsetMargin != nsMargin(0, 0, 0, 0)) {
+ nsRect outsetRect(nsPoint(0, 0), aNewSize);
+ outsetRect.Inflate(outsetMargin);
+ r.UnionRect(r, outsetRect);
+ }
+
+ // Note that we don't remove the outlineInnerRect if a frame loses outline
+ // style. That would require an extra property lookup for every frame,
+ // or a new frame state bit to track whether a property had been stored,
+ // or something like that. It's not worth doing that here. At most it's
+ // only one heap-allocated rect per frame and it will be cleaned up when
+ // the frame dies.
+
+ if (nsSVGIntegrationUtils::UsingEffectsForFrame(aFrame)) {
+ aFrame->Properties().
+ Set(nsIFrame::PreEffectsBBoxProperty(), new nsRect(r));
+ r = nsSVGIntegrationUtils::ComputePostEffectsVisualOverflowRect(aFrame, r);
+ }
+
+ return r;
+}
+
+void
+nsIFrame::MovePositionBy(const nsPoint& aTranslation)
+{
+ nsPoint position = GetNormalPosition() + aTranslation;
+
+ const nsMargin* computedOffsets = nullptr;
+ if (IsRelativelyPositioned()) {
+ computedOffsets = Properties().Get(nsIFrame::ComputedOffsetProperty());
+ }
+ ReflowInput::ApplyRelativePositioning(this, computedOffsets ?
+ *computedOffsets : nsMargin(),
+ &position);
+ SetPosition(position);
+}
+
+nsRect
+nsIFrame::GetNormalRect() const
+{
+ // It might be faster to first check
+ // StyleDisplay()->IsRelativelyPositionedStyle().
+ nsPoint* normalPosition = Properties().Get(NormalPositionProperty());
+ if (normalPosition) {
+ return nsRect(*normalPosition, GetSize());
+ }
+ return GetRect();
+}
+
+nsPoint
+nsIFrame::GetNormalPosition() const
+{
+ // It might be faster to first check
+ // StyleDisplay()->IsRelativelyPositionedStyle().
+ nsPoint* normalPosition = Properties().Get(NormalPositionProperty());
+ if (normalPosition) {
+ return *normalPosition;
+ }
+ return GetPosition();
+}
+
+nsPoint
+nsIFrame::GetPositionIgnoringScrolling()
+{
+ return GetParent() ? GetParent()->GetPositionOfChildIgnoringScrolling(this)
+ : GetPosition();
+}
+
+nsRect
+nsIFrame::GetOverflowRect(nsOverflowType aType) const
+{
+ MOZ_ASSERT(aType == eVisualOverflow || aType == eScrollableOverflow,
+ "unexpected type");
+
+ // Note that in some cases the overflow area might not have been
+ // updated (yet) to reflect any outline set on the frame or the area
+ // of child frames. That's OK because any reflow that updates these
+ // areas will invalidate the appropriate area, so any (mis)uses of
+ // this method will be fixed up.
+
+ if (mOverflow.mType == NS_FRAME_OVERFLOW_LARGE) {
+ // there is an overflow rect, and it's not stored as deltas but as
+ // a separately-allocated rect
+ return static_cast<nsOverflowAreas*>(const_cast<nsIFrame*>(this)->
+ GetOverflowAreasProperty())->Overflow(aType);
+ }
+
+ if (aType == eVisualOverflow &&
+ mOverflow.mType != NS_FRAME_OVERFLOW_NONE) {
+ return GetVisualOverflowFromDeltas();
+ }
+
+ return nsRect(nsPoint(0, 0), GetSize());
+}
+
+nsOverflowAreas
+nsIFrame::GetOverflowAreas() const
+{
+ if (mOverflow.mType == NS_FRAME_OVERFLOW_LARGE) {
+ // there is an overflow rect, and it's not stored as deltas but as
+ // a separately-allocated rect
+ return *const_cast<nsIFrame*>(this)->GetOverflowAreasProperty();
+ }
+
+ return nsOverflowAreas(GetVisualOverflowFromDeltas(),
+ nsRect(nsPoint(0, 0), GetSize()));
+}
+
+nsOverflowAreas
+nsIFrame::GetOverflowAreasRelativeToSelf() const
+{
+ if (IsTransformed()) {
+ nsOverflowAreas* preTransformOverflows =
+ Properties().Get(PreTransformOverflowAreasProperty());
+ if (preTransformOverflows) {
+ return nsOverflowAreas(preTransformOverflows->VisualOverflow(),
+ preTransformOverflows->ScrollableOverflow());
+ }
+ }
+ return nsOverflowAreas(GetVisualOverflowRect(),
+ GetScrollableOverflowRect());
+}
+
+nsRect
+nsIFrame::GetScrollableOverflowRectRelativeToParent() const
+{
+ return GetScrollableOverflowRect() + mRect.TopLeft();
+}
+
+nsRect
+nsIFrame::GetVisualOverflowRectRelativeToParent() const
+{
+ return GetVisualOverflowRect() + mRect.TopLeft();
+}
+
+nsRect
+nsIFrame::GetScrollableOverflowRectRelativeToSelf() const
+{
+ if (IsTransformed()) {
+ nsOverflowAreas* preTransformOverflows =
+ Properties().Get(PreTransformOverflowAreasProperty());
+ if (preTransformOverflows)
+ return preTransformOverflows->ScrollableOverflow();
+ }
+ return GetScrollableOverflowRect();
+}
+
+nsRect
+nsIFrame::GetVisualOverflowRectRelativeToSelf() const
+{
+ if (IsTransformed()) {
+ nsOverflowAreas* preTransformOverflows =
+ Properties().Get(PreTransformOverflowAreasProperty());
+ if (preTransformOverflows)
+ return preTransformOverflows->VisualOverflow();
+ }
+ return GetVisualOverflowRect();
+}
+
+nsRect
+nsIFrame::GetPreEffectsVisualOverflowRect() const
+{
+ nsRect* r = Properties().Get(nsIFrame::PreEffectsBBoxProperty());
+ return r ? *r : GetVisualOverflowRectRelativeToSelf();
+}
+
+bool
+nsIFrame::UpdateOverflow()
+{
+ MOZ_ASSERT(FrameMaintainsOverflow(),
+ "Non-display SVG do not maintain visual overflow rects");
+
+ nsRect rect(nsPoint(0, 0), GetSize());
+ nsOverflowAreas overflowAreas(rect, rect);
+
+ if (!ComputeCustomOverflow(overflowAreas)) {
+ return false;
+ }
+
+ UnionChildOverflow(overflowAreas);
+
+ if (FinishAndStoreOverflow(overflowAreas, GetSize())) {
+ nsView* view = GetView();
+ if (view) {
+ uint32_t flags = GetXULLayoutFlags();
+
+ if ((flags & NS_FRAME_NO_SIZE_VIEW) == 0) {
+ // Make sure the frame's view is properly sized.
+ nsViewManager* vm = view->GetViewManager();
+ vm->ResizeView(view, overflowAreas.VisualOverflow(), true);
+ }
+ }
+
+ return true;
+ }
+
+ return false;
+}
+
+/* virtual */ bool
+nsFrame::ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas)
+{
+ return true;
+}
+
+/* virtual */ void
+nsFrame::UnionChildOverflow(nsOverflowAreas& aOverflowAreas)
+{
+ if (!DoesClipChildren() &&
+ !(IsXULCollapsed() && (IsXULBoxFrame() || ::IsXULBoxWrapped(this)))) {
+ nsLayoutUtils::UnionChildOverflow(this, aOverflowAreas);
+ }
+}
+
+
+// Define the MAX_FRAME_DEPTH to be the ContentSink's MAX_REFLOW_DEPTH plus
+// 4 for the frames above the document's frames:
+// the Viewport, GFXScroll, ScrollPort, and Canvas
+#define MAX_FRAME_DEPTH (MAX_REFLOW_DEPTH+4)
+
+bool
+nsFrame::IsFrameTreeTooDeep(const ReflowInput& aReflowInput,
+ ReflowOutput& aMetrics,
+ nsReflowStatus& aStatus)
+{
+ if (aReflowInput.mReflowDepth > MAX_FRAME_DEPTH) {
+ NS_WARNING("frame tree too deep; setting zero size and returning");
+ mState |= NS_FRAME_TOO_DEEP_IN_FRAME_TREE;
+ ClearOverflowRects();
+ aMetrics.ClearSize();
+ aMetrics.SetBlockStartAscent(0);
+ aMetrics.mCarriedOutBEndMargin.Zero();
+ aMetrics.mOverflowAreas.Clear();
+
+ if (GetNextInFlow()) {
+ // Reflow depth might vary between reflows, so we might have
+ // successfully reflowed and split this frame before. If so, we
+ // shouldn't delete its continuations.
+ aStatus = NS_FRAME_NOT_COMPLETE;
+ } else {
+ aStatus = NS_FRAME_COMPLETE;
+ }
+
+ return true;
+ }
+ mState &= ~NS_FRAME_TOO_DEEP_IN_FRAME_TREE;
+ return false;
+}
+
+bool
+nsIFrame::IsBlockWrapper() const
+{
+ nsIAtom *pseudoType = StyleContext()->GetPseudo();
+ return (pseudoType == nsCSSAnonBoxes::mozAnonymousBlock ||
+ pseudoType == nsCSSAnonBoxes::mozAnonymousPositionedBlock ||
+ pseudoType == nsCSSAnonBoxes::buttonContent ||
+ pseudoType == nsCSSAnonBoxes::cellContent);
+}
+
+static nsIFrame*
+GetNearestBlockContainer(nsIFrame* frame)
+{
+ // The block wrappers we use to wrap blocks inside inlines aren't
+ // described in the CSS spec. We need to make them not be containing
+ // blocks.
+ // Since the parent of such a block is either a normal block or
+ // another such pseudo, this shouldn't cause anything bad to happen.
+ // Also the anonymous blocks inside table cells are not containing blocks.
+ while (frame->IsFrameOfType(nsIFrame::eLineParticipant) ||
+ frame->IsBlockWrapper() ||
+ // Table rows are not containing blocks either
+ frame->GetType() == nsGkAtoms::tableRowFrame) {
+ frame = frame->GetParent();
+ NS_ASSERTION(frame, "How come we got to the root frame without seeing a containing block?");
+ }
+ return frame;
+}
+
+nsIFrame*
+nsIFrame::GetContainingBlock(uint32_t aFlags) const
+{
+ if (!GetParent()) {
+ return nullptr;
+ }
+ // MathML frames might have absolute positioning style, but they would
+ // still be in-flow. So we have to check to make sure that the frame
+ // is really out-of-flow too.
+ nsIFrame* f;
+ if (IsAbsolutelyPositioned() &&
+ (GetStateBits() & NS_FRAME_OUT_OF_FLOW)) {
+ f = GetParent(); // the parent is always the containing block
+ } else {
+ f = GetNearestBlockContainer(GetParent());
+ }
+
+ if (aFlags & SKIP_SCROLLED_FRAME && f &&
+ f->StyleContext()->GetPseudo() == nsCSSAnonBoxes::scrolledContent) {
+ f = f->GetParent();
+ }
+ return f;
+}
+
+#ifdef DEBUG_FRAME_DUMP
+
+int32_t nsFrame::ContentIndexInContainer(const nsIFrame* aFrame)
+{
+ int32_t result = -1;
+
+ nsIContent* content = aFrame->GetContent();
+ if (content) {
+ nsIContent* parentContent = content->GetParent();
+ if (parentContent) {
+ result = parentContent->IndexOf(content);
+ }
+ }
+
+ return result;
+}
+
+/**
+ * List a frame tree to stderr. Meant to be called from gdb.
+ */
+void
+DebugListFrameTree(nsIFrame* aFrame)
+{
+ ((nsFrame*)aFrame)->List(stderr);
+}
+
+void
+nsIFrame::ListTag(nsACString& aTo) const
+{
+ ListTag(aTo, this);
+}
+
+/* static */
+void
+nsIFrame::ListTag(nsACString& aTo, const nsIFrame* aFrame) {
+ nsAutoString tmp;
+ aFrame->GetFrameName(tmp);
+ aTo += NS_ConvertUTF16toUTF8(tmp).get();
+ aTo += nsPrintfCString("@%p", static_cast<const void*>(aFrame));
+}
+
+// Debugging
+void
+nsIFrame::ListGeneric(nsACString& aTo, const char* aPrefix, uint32_t aFlags) const
+{
+ aTo =+ aPrefix;
+ ListTag(aTo);
+ if (HasView()) {
+ aTo += nsPrintfCString(" [view=%p]", static_cast<void*>(GetView()));
+ }
+ if (GetNextSibling()) {
+ aTo += nsPrintfCString(" next=%p", static_cast<void*>(GetNextSibling()));
+ }
+ if (GetPrevContinuation()) {
+ bool fluid = GetPrevInFlow() == GetPrevContinuation();
+ aTo += nsPrintfCString(" prev-%s=%p", fluid?"in-flow":"continuation",
+ static_cast<void*>(GetPrevContinuation()));
+ }
+ if (GetNextContinuation()) {
+ bool fluid = GetNextInFlow() == GetNextContinuation();
+ aTo += nsPrintfCString(" next-%s=%p", fluid?"in-flow":"continuation",
+ static_cast<void*>(GetNextContinuation()));
+ }
+ void* IBsibling = Properties().Get(IBSplitSibling());
+ if (IBsibling) {
+ aTo += nsPrintfCString(" IBSplitSibling=%p", IBsibling);
+ }
+ void* IBprevsibling = Properties().Get(IBSplitPrevSibling());
+ if (IBprevsibling) {
+ aTo += nsPrintfCString(" IBSplitPrevSibling=%p", IBprevsibling);
+ }
+ aTo += nsPrintfCString(" {%d,%d,%d,%d}", mRect.x, mRect.y, mRect.width, mRect.height);
+
+ mozilla::WritingMode wm = GetWritingMode();
+ if (wm.IsVertical() || !wm.IsBidiLTR()) {
+ aTo += nsPrintfCString(" wm=%s: logical size={%d,%d}", wm.DebugString(),
+ ISize(), BSize());
+ }
+
+ nsIFrame* parent = GetParent();
+ if (parent) {
+ WritingMode pWM = parent->GetWritingMode();
+ if (pWM.IsVertical() || !pWM.IsBidiLTR()) {
+ nsSize containerSize = parent->mRect.Size();
+ LogicalRect lr(pWM, mRect, containerSize);
+ aTo += nsPrintfCString(" parent wm=%s, cs={%d,%d}, "
+ " logicalRect={%d,%d,%d,%d}",
+ pWM.DebugString(),
+ containerSize.width, containerSize.height,
+ lr.IStart(pWM), lr.BStart(pWM),
+ lr.ISize(pWM), lr.BSize(pWM));
+ }
+ }
+ nsIFrame* f = const_cast<nsIFrame*>(this);
+ if (f->HasOverflowAreas()) {
+ nsRect vo = f->GetVisualOverflowRect();
+ if (!vo.IsEqualEdges(mRect)) {
+ aTo += nsPrintfCString(" vis-overflow=%d,%d,%d,%d", vo.x, vo.y, vo.width, vo.height);
+ }
+ nsRect so = f->GetScrollableOverflowRect();
+ if (!so.IsEqualEdges(mRect)) {
+ aTo += nsPrintfCString(" scr-overflow=%d,%d,%d,%d", so.x, so.y, so.width, so.height);
+ }
+ }
+ if (0 != mState) {
+ aTo += nsPrintfCString(" [state=%016llx]", (unsigned long long)mState);
+ }
+ if (IsTransformed()) {
+ aTo += nsPrintfCString(" transformed");
+ }
+ if (ChildrenHavePerspective()) {
+ aTo += nsPrintfCString(" perspective");
+ }
+ if (Extend3DContext()) {
+ aTo += nsPrintfCString(" preserves-3d-children");
+ }
+ if (Combines3DTransformWithAncestors()) {
+ aTo += nsPrintfCString(" preserves-3d");
+ }
+ if (mContent) {
+ aTo += nsPrintfCString(" [content=%p]", static_cast<void*>(mContent));
+ }
+ aTo += nsPrintfCString(" [sc=%p", static_cast<void*>(mStyleContext));
+ if (mStyleContext) {
+ nsIAtom* pseudoTag = mStyleContext->GetPseudo();
+ if (pseudoTag) {
+ nsAutoString atomString;
+ pseudoTag->ToString(atomString);
+ aTo += nsPrintfCString("%s", NS_LossyConvertUTF16toASCII(atomString).get());
+ }
+ if (!mStyleContext->GetParent() ||
+ (GetParent() && GetParent()->StyleContext() != mStyleContext->GetParent())) {
+ aTo += nsPrintfCString("^%p", mStyleContext->GetParent());
+ if (mStyleContext->GetParent()) {
+ aTo += nsPrintfCString("^%p", mStyleContext->GetParent()->GetParent());
+ if (mStyleContext->GetParent()->GetParent()) {
+ aTo += nsPrintfCString("^%p", mStyleContext->GetParent()->GetParent()->GetParent());
+ }
+ }
+ }
+ }
+ aTo += "]";
+}
+
+void
+nsIFrame::List(FILE* out, const char* aPrefix, uint32_t aFlags) const
+{
+ nsCString str;
+ ListGeneric(str, aPrefix, aFlags);
+ fprintf_stderr(out, "%s\n", str.get());
+}
+
+nsresult
+nsFrame::GetFrameName(nsAString& aResult) const
+{
+ return MakeFrameName(NS_LITERAL_STRING("Frame"), aResult);
+}
+
+nsresult
+nsFrame::MakeFrameName(const nsAString& aType, nsAString& aResult) const
+{
+ aResult = aType;
+ if (mContent && !mContent->IsNodeOfType(nsINode::eTEXT)) {
+ nsAutoString buf;
+ mContent->NodeInfo()->NameAtom()->ToString(buf);
+ if (GetType() == nsGkAtoms::subDocumentFrame) {
+ nsAutoString src;
+ mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::src, src);
+ buf.AppendLiteral(" src=");
+ buf.Append(src);
+ }
+ aResult.Append('(');
+ aResult.Append(buf);
+ aResult.Append(')');
+ }
+ char buf[40];
+ SprintfLiteral(buf, "(%d)", ContentIndexInContainer(this));
+ AppendASCIItoUTF16(buf, aResult);
+ return NS_OK;
+}
+
+void
+nsIFrame::DumpFrameTree() const
+{
+ RootFrameList(PresContext(), stderr);
+}
+
+void
+nsIFrame::DumpFrameTreeLimited() const
+{
+ List(stderr);
+}
+
+void
+nsIFrame::RootFrameList(nsPresContext* aPresContext, FILE* out, const char* aPrefix)
+{
+ if (!aPresContext || !out)
+ return;
+
+ nsIPresShell *shell = aPresContext->GetPresShell();
+ if (shell) {
+ nsIFrame* frame = shell->FrameManager()->GetRootFrame();
+ if(frame) {
+ frame->List(out, aPrefix);
+ }
+ }
+}
+#endif
+
+#ifdef DEBUG
+nsFrameState
+nsFrame::GetDebugStateBits() const
+{
+ // We'll ignore these flags for the purposes of comparing frame state:
+ //
+ // NS_FRAME_EXTERNAL_REFERENCE
+ // because this is set by the event state manager or the
+ // caret code when a frame is focused. Depending on whether
+ // or not the regression tests are run as the focused window
+ // will make this value vary randomly.
+#define IRRELEVANT_FRAME_STATE_FLAGS NS_FRAME_EXTERNAL_REFERENCE
+
+#define FRAME_STATE_MASK (~(IRRELEVANT_FRAME_STATE_FLAGS))
+
+ return GetStateBits() & FRAME_STATE_MASK;
+}
+
+void
+nsFrame::XMLQuote(nsString& aString)
+{
+ int32_t i, len = aString.Length();
+ for (i = 0; i < len; i++) {
+ char16_t ch = aString.CharAt(i);
+ if (ch == '<') {
+ nsAutoString tmp(NS_LITERAL_STRING("&lt;"));
+ aString.Cut(i, 1);
+ aString.Insert(tmp, i);
+ len += 3;
+ i += 3;
+ }
+ else if (ch == '>') {
+ nsAutoString tmp(NS_LITERAL_STRING("&gt;"));
+ aString.Cut(i, 1);
+ aString.Insert(tmp, i);
+ len += 3;
+ i += 3;
+ }
+ else if (ch == '\"') {
+ nsAutoString tmp(NS_LITERAL_STRING("&quot;"));
+ aString.Cut(i, 1);
+ aString.Insert(tmp, i);
+ len += 5;
+ i += 5;
+ }
+ }
+}
+#endif
+
+bool
+nsIFrame::IsVisibleForPainting(nsDisplayListBuilder* aBuilder) {
+ if (!StyleVisibility()->IsVisible())
+ return false;
+ nsISelection* sel = aBuilder->GetBoundingSelection();
+ return !sel || IsVisibleInSelection(sel);
+}
+
+bool
+nsIFrame::IsVisibleForPainting() {
+ if (!StyleVisibility()->IsVisible())
+ return false;
+
+ nsPresContext* pc = PresContext();
+ if (!pc->IsRenderingOnlySelection())
+ return true;
+
+ nsCOMPtr<nsISelectionController> selcon(do_QueryInterface(pc->PresShell()));
+ if (selcon) {
+ nsCOMPtr<nsISelection> sel;
+ selcon->GetSelection(nsISelectionController::SELECTION_NORMAL,
+ getter_AddRefs(sel));
+ if (sel)
+ return IsVisibleInSelection(sel);
+ }
+ return true;
+}
+
+bool
+nsIFrame::IsVisibleInSelection(nsDisplayListBuilder* aBuilder) {
+ nsISelection* sel = aBuilder->GetBoundingSelection();
+ return !sel || IsVisibleInSelection(sel);
+}
+
+bool
+nsIFrame::IsVisibleOrCollapsedForPainting(nsDisplayListBuilder* aBuilder) {
+ if (!StyleVisibility()->IsVisibleOrCollapsed())
+ return false;
+ nsISelection* sel = aBuilder->GetBoundingSelection();
+ return !sel || IsVisibleInSelection(sel);
+}
+
+bool
+nsIFrame::IsVisibleInSelection(nsISelection* aSelection)
+{
+ if (!GetContent() || !GetContent()->IsSelectionDescendant()) {
+ return false;
+ }
+
+ nsCOMPtr<nsIDOMNode> node(do_QueryInterface(mContent));
+ bool vis;
+ nsresult rv = aSelection->ContainsNode(node, true, &vis);
+ return NS_FAILED(rv) || vis;
+}
+
+/* virtual */ bool
+nsFrame::IsEmpty()
+{
+ return false;
+}
+
+bool
+nsIFrame::CachedIsEmpty()
+{
+ NS_PRECONDITION(!(GetStateBits() & NS_FRAME_IS_DIRTY),
+ "Must only be called on reflowed lines");
+ return IsEmpty();
+}
+
+/* virtual */ bool
+nsFrame::IsSelfEmpty()
+{
+ return false;
+}
+
+nsresult
+nsFrame::GetSelectionController(nsPresContext *aPresContext, nsISelectionController **aSelCon)
+{
+ if (!aPresContext || !aSelCon)
+ return NS_ERROR_INVALID_ARG;
+
+ nsIFrame *frame = this;
+ while (frame && (frame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION)) {
+ nsITextControlFrame *tcf = do_QueryFrame(frame);
+ if (tcf) {
+ return tcf->GetOwnedSelectionController(aSelCon);
+ }
+ frame = frame->GetParent();
+ }
+
+ return CallQueryInterface(aPresContext->GetPresShell(), aSelCon);
+}
+
+already_AddRefed<nsFrameSelection>
+nsIFrame::GetFrameSelection()
+{
+ RefPtr<nsFrameSelection> fs =
+ const_cast<nsFrameSelection*>(GetConstFrameSelection());
+ return fs.forget();
+}
+
+const nsFrameSelection*
+nsIFrame::GetConstFrameSelection() const
+{
+ nsIFrame* frame = const_cast<nsIFrame*>(this);
+ while (frame && (frame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION)) {
+ nsITextControlFrame* tcf = do_QueryFrame(frame);
+ if (tcf) {
+ return tcf->GetOwnedFrameSelection();
+ }
+ frame = frame->GetParent();
+ }
+
+ return PresContext()->PresShell()->ConstFrameSelection();
+}
+
+#ifdef DEBUG
+nsresult
+nsFrame::DumpRegressionData(nsPresContext* aPresContext, FILE* out, int32_t aIndent)
+{
+ IndentBy(out, aIndent);
+ fprintf(out, "<frame va=\"%p\" type=\"", (void*)this);
+ nsAutoString name;
+ GetFrameName(name);
+ XMLQuote(name);
+ fputs(NS_LossyConvertUTF16toASCII(name).get(), out);
+ fprintf(out, "\" state=\"%016llx\" parent=\"%p\">\n",
+ (unsigned long long)GetDebugStateBits(), (void*)GetParent());
+
+ aIndent++;
+ DumpBaseRegressionData(aPresContext, out, aIndent);
+ aIndent--;
+
+ IndentBy(out, aIndent);
+ fprintf(out, "</frame>\n");
+
+ return NS_OK;
+}
+
+void
+nsFrame::DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, int32_t aIndent)
+{
+ if (GetNextSibling()) {
+ IndentBy(out, aIndent);
+ fprintf(out, "<next-sibling va=\"%p\"/>\n", (void*)GetNextSibling());
+ }
+
+ if (HasView()) {
+ IndentBy(out, aIndent);
+ fprintf(out, "<view va=\"%p\">\n", (void*)GetView());
+ aIndent++;
+ // XXX add in code to dump out view state too...
+ aIndent--;
+ IndentBy(out, aIndent);
+ fprintf(out, "</view>\n");
+ }
+
+ IndentBy(out, aIndent);
+ fprintf(out, "<bbox x=\"%d\" y=\"%d\" w=\"%d\" h=\"%d\"/>\n",
+ mRect.x, mRect.y, mRect.width, mRect.height);
+
+ // Now dump all of the children on all of the child lists
+ ChildListIterator lists(this);
+ for (; !lists.IsDone(); lists.Next()) {
+ IndentBy(out, aIndent);
+ if (lists.CurrentID() != kPrincipalList) {
+ fprintf(out, "<child-list name=\"%s\">\n", mozilla::layout::ChildListName(lists.CurrentID()));
+ }
+ else {
+ fprintf(out, "<child-list>\n");
+ }
+ aIndent++;
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ nsIFrame* kid = childFrames.get();
+ kid->DumpRegressionData(aPresContext, out, aIndent);
+ }
+ aIndent--;
+ IndentBy(out, aIndent);
+ fprintf(out, "</child-list>\n");
+ }
+}
+#endif
+
+bool
+nsIFrame::IsFrameSelected() const
+{
+ NS_ASSERTION(!GetContent() || GetContent()->IsSelectionDescendant(),
+ "use the public IsSelected() instead");
+ return nsRange::IsNodeSelected(GetContent(), 0,
+ GetContent()->GetChildCount());
+}
+
+nsresult
+nsFrame::GetPointFromOffset(int32_t inOffset, nsPoint* outPoint)
+{
+ NS_PRECONDITION(outPoint != nullptr, "Null parameter");
+ nsRect contentRect = GetContentRectRelativeToSelf();
+ nsPoint pt = contentRect.TopLeft();
+ if (mContent)
+ {
+ nsIContent* newContent = mContent->GetParent();
+ if (newContent){
+ int32_t newOffset = newContent->IndexOf(mContent);
+
+ // Find the direction of the frame from the EmbeddingLevelProperty,
+ // which is the resolved bidi level set in
+ // nsBidiPresUtils::ResolveParagraph (odd levels = right-to-left).
+ // If the embedding level isn't set, just use the CSS direction
+ // property.
+ bool hasBidiData;
+ FrameBidiData bidiData =
+ Properties().Get(BidiDataProperty(), &hasBidiData);
+ bool isRTL = hasBidiData
+ ? IS_LEVEL_RTL(bidiData.embeddingLevel)
+ : StyleVisibility()->mDirection == NS_STYLE_DIRECTION_RTL;
+ if ((!isRTL && inOffset > newOffset) ||
+ (isRTL && inOffset <= newOffset)) {
+ pt = contentRect.TopRight();
+ }
+ }
+ }
+ *outPoint = pt;
+ return NS_OK;
+}
+
+nsresult
+nsFrame::GetCharacterRectsInRange(int32_t aInOffset, int32_t aLength,
+ nsTArray<nsRect>& aOutRect)
+{
+ /* no text */
+ return NS_ERROR_FAILURE;
+}
+
+nsresult
+nsFrame::GetChildFrameContainingOffset(int32_t inContentOffset, bool inHint, int32_t* outFrameContentOffset, nsIFrame **outChildFrame)
+{
+ NS_PRECONDITION(outChildFrame && outFrameContentOffset, "Null parameter");
+ *outFrameContentOffset = (int32_t)inHint;
+ //the best frame to reflect any given offset would be a visible frame if possible
+ //i.e. we are looking for a valid frame to place the blinking caret
+ nsRect rect = GetRect();
+ if (!rect.width || !rect.height)
+ {
+ //if we have a 0 width or height then lets look for another frame that possibly has
+ //the same content. If we have no frames in flow then just let us return 'this' frame
+ nsIFrame* nextFlow = GetNextInFlow();
+ if (nextFlow)
+ return nextFlow->GetChildFrameContainingOffset(inContentOffset, inHint, outFrameContentOffset, outChildFrame);
+ }
+ *outChildFrame = this;
+ return NS_OK;
+}
+
+//
+// What I've pieced together about this routine:
+// Starting with a block frame (from which a line frame can be gotten)
+// and a line number, drill down and get the first/last selectable
+// frame on that line, depending on aPos->mDirection.
+// aOutSideLimit != 0 means ignore aLineStart, instead work from
+// the end (if > 0) or beginning (if < 0).
+//
+nsresult
+nsFrame::GetNextPrevLineFromeBlockFrame(nsPresContext* aPresContext,
+ nsPeekOffsetStruct *aPos,
+ nsIFrame *aBlockFrame,
+ int32_t aLineStart,
+ int8_t aOutSideLimit
+ )
+{
+ //magic numbers aLineStart will be -1 for end of block 0 will be start of block
+ if (!aBlockFrame || !aPos)
+ return NS_ERROR_NULL_POINTER;
+
+ aPos->mResultFrame = nullptr;
+ aPos->mResultContent = nullptr;
+ aPos->mAttach =
+ aPos->mDirection == eDirNext ? CARET_ASSOCIATE_AFTER : CARET_ASSOCIATE_BEFORE;
+
+ nsAutoLineIterator it = aBlockFrame->GetLineIterator();
+ if (!it)
+ return NS_ERROR_FAILURE;
+ int32_t searchingLine = aLineStart;
+ int32_t countLines = it->GetNumLines();
+ if (aOutSideLimit > 0) //start at end
+ searchingLine = countLines;
+ else if (aOutSideLimit <0)//start at beginning
+ searchingLine = -1;//"next" will be 0
+ else
+ if ((aPos->mDirection == eDirPrevious && searchingLine == 0) ||
+ (aPos->mDirection == eDirNext && searchingLine >= (countLines -1) )){
+ //we need to jump to new block frame.
+ return NS_ERROR_FAILURE;
+ }
+ int32_t lineFrameCount;
+ nsIFrame *resultFrame = nullptr;
+ nsIFrame *farStoppingFrame = nullptr; //we keep searching until we find a "this" frame then we go to next line
+ nsIFrame *nearStoppingFrame = nullptr; //if we are backing up from edge, stop here
+ nsIFrame *firstFrame;
+ nsIFrame *lastFrame;
+ nsRect rect;
+ bool isBeforeFirstFrame, isAfterLastFrame;
+ bool found = false;
+
+ nsresult result = NS_OK;
+ while (!found)
+ {
+ if (aPos->mDirection == eDirPrevious)
+ searchingLine --;
+ else
+ searchingLine ++;
+ if ((aPos->mDirection == eDirPrevious && searchingLine < 0) ||
+ (aPos->mDirection == eDirNext && searchingLine >= countLines ))
+ {
+ //we need to jump to new block frame.
+ return NS_ERROR_FAILURE;
+ }
+ result = it->GetLine(searchingLine, &firstFrame, &lineFrameCount,
+ rect);
+ if (!lineFrameCount)
+ continue;
+ if (NS_SUCCEEDED(result)){
+ lastFrame = firstFrame;
+ for (;lineFrameCount > 1;lineFrameCount --){
+ //result = lastFrame->GetNextSibling(&lastFrame, searchingLine);
+ result = it->GetNextSiblingOnLine(lastFrame, searchingLine);
+ if (NS_FAILED(result) || !lastFrame){
+ NS_ERROR("GetLine promised more frames than could be found");
+ return NS_ERROR_FAILURE;
+ }
+ }
+ GetLastLeaf(aPresContext, &lastFrame);
+
+ if (aPos->mDirection == eDirNext){
+ nearStoppingFrame = firstFrame;
+ farStoppingFrame = lastFrame;
+ }
+ else{
+ nearStoppingFrame = lastFrame;
+ farStoppingFrame = firstFrame;
+ }
+ nsPoint offset;
+ nsView * view; //used for call of get offset from view
+ aBlockFrame->GetOffsetFromView(offset,&view);
+ nsPoint newDesiredPos =
+ aPos->mDesiredPos - offset; //get desired position into blockframe coords
+ result = it->FindFrameAt(searchingLine, newDesiredPos, &resultFrame,
+ &isBeforeFirstFrame, &isAfterLastFrame);
+ if(NS_FAILED(result))
+ continue;
+ }
+
+ if (NS_SUCCEEDED(result) && resultFrame)
+ {
+ //check to see if this is ANOTHER blockframe inside the other one if so then call into its lines
+ nsAutoLineIterator newIt = resultFrame->GetLineIterator();
+ if (newIt)
+ {
+ aPos->mResultFrame = resultFrame;
+ return NS_OK;
+ }
+ //resultFrame is not a block frame
+ result = NS_ERROR_FAILURE;
+
+ nsCOMPtr<nsIFrameEnumerator> frameTraversal;
+ result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
+ aPresContext, resultFrame,
+ ePostOrder,
+ false, // aVisual
+ aPos->mScrollViewStop,
+ false, // aFollowOOFs
+ false // aSkipPopupChecks
+ );
+ if (NS_FAILED(result))
+ return result;
+
+ nsIFrame *storeOldResultFrame = resultFrame;
+ while ( !found ){
+ nsPoint point;
+ nsRect tempRect = resultFrame->GetRect();
+ nsPoint offset;
+ nsView * view; //used for call of get offset from view
+ resultFrame->GetOffsetFromView(offset, &view);
+ if (!view) {
+ return NS_ERROR_FAILURE;
+ }
+ if (resultFrame->GetWritingMode().IsVertical()) {
+ point.y = aPos->mDesiredPos.y;
+ point.x = tempRect.width + offset.x;
+ } else {
+ point.y = tempRect.height + offset.y;
+ point.x = aPos->mDesiredPos.x;
+ }
+
+ //special check. if we allow non-text selection then we can allow a hit location to fall before a table.
+ //otherwise there is no way to get and click signal to fall before a table (it being a line iterator itself)
+ nsIPresShell *shell = aPresContext->GetPresShell();
+ if (!shell)
+ return NS_ERROR_FAILURE;
+ int16_t isEditor = shell->GetSelectionFlags();
+ isEditor = isEditor == nsISelectionDisplay::DISPLAY_ALL;
+ if ( isEditor )
+ {
+ if (resultFrame->GetType() == nsGkAtoms::tableWrapperFrame)
+ {
+ if (((point.x - offset.x + tempRect.x)<0) || ((point.x - offset.x+ tempRect.x)>tempRect.width))//off left/right side
+ {
+ nsIContent* content = resultFrame->GetContent();
+ if (content)
+ {
+ nsIContent* parent = content->GetParent();
+ if (parent)
+ {
+ aPos->mResultContent = parent;
+ aPos->mContentOffset = parent->IndexOf(content);
+ aPos->mAttach = CARET_ASSOCIATE_BEFORE;
+ if ((point.x - offset.x+ tempRect.x)>tempRect.width)
+ {
+ aPos->mContentOffset++;//go to end of this frame
+ aPos->mAttach = CARET_ASSOCIATE_AFTER;
+ }
+ //result frame is the result frames parent.
+ aPos->mResultFrame = resultFrame->GetParent();
+ return NS_POSITION_BEFORE_TABLE;
+ }
+ }
+ }
+ }
+ }
+
+ if (!resultFrame->HasView())
+ {
+ nsView* view;
+ nsPoint offset;
+ resultFrame->GetOffsetFromView(offset, &view);
+ ContentOffsets offsets =
+ resultFrame->GetContentOffsetsFromPoint(point - offset);
+ aPos->mResultContent = offsets.content;
+ aPos->mContentOffset = offsets.offset;
+ aPos->mAttach = offsets.associate;
+ if (offsets.content)
+ {
+ bool selectable;
+ resultFrame->IsSelectable(&selectable, nullptr);
+ if (selectable)
+ {
+ found = true;
+ break;
+ }
+ }
+ }
+
+ if (aPos->mDirection == eDirPrevious && (resultFrame == farStoppingFrame))
+ break;
+ if (aPos->mDirection == eDirNext && (resultFrame == nearStoppingFrame))
+ break;
+ //always try previous on THAT line if that fails go the other way
+ frameTraversal->Prev();
+ resultFrame = frameTraversal->CurrentItem();
+ if (!resultFrame)
+ return NS_ERROR_FAILURE;
+ }
+
+ if (!found){
+ resultFrame = storeOldResultFrame;
+
+ result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
+ aPresContext, resultFrame,
+ eLeaf,
+ false, // aVisual
+ aPos->mScrollViewStop,
+ false, // aFollowOOFs
+ false // aSkipPopupChecks
+ );
+ }
+ while ( !found ){
+ nsPoint point = aPos->mDesiredPos;
+ nsView* view;
+ nsPoint offset;
+ resultFrame->GetOffsetFromView(offset, &view);
+ ContentOffsets offsets =
+ resultFrame->GetContentOffsetsFromPoint(point - offset);
+ aPos->mResultContent = offsets.content;
+ aPos->mContentOffset = offsets.offset;
+ aPos->mAttach = offsets.associate;
+ if (offsets.content)
+ {
+ bool selectable;
+ resultFrame->IsSelectable(&selectable, nullptr);
+ if (selectable)
+ {
+ found = true;
+ if (resultFrame == farStoppingFrame)
+ aPos->mAttach = CARET_ASSOCIATE_BEFORE;
+ else
+ aPos->mAttach = CARET_ASSOCIATE_AFTER;
+ break;
+ }
+ }
+ if (aPos->mDirection == eDirPrevious && (resultFrame == nearStoppingFrame))
+ break;
+ if (aPos->mDirection == eDirNext && (resultFrame == farStoppingFrame))
+ break;
+ //previous didnt work now we try "next"
+ frameTraversal->Next();
+ nsIFrame *tempFrame = frameTraversal->CurrentItem();
+ if (!tempFrame)
+ break;
+ resultFrame = tempFrame;
+ }
+ aPos->mResultFrame = resultFrame;
+ }
+ else {
+ //we need to jump to new block frame.
+ aPos->mAmount = eSelectLine;
+ aPos->mStartOffset = 0;
+ aPos->mAttach = aPos->mDirection == eDirNext ?
+ CARET_ASSOCIATE_BEFORE : CARET_ASSOCIATE_AFTER;
+ if (aPos->mDirection == eDirPrevious)
+ aPos->mStartOffset = -1;//start from end
+ return aBlockFrame->PeekOffset(aPos);
+ }
+ }
+ return NS_OK;
+}
+
+nsIFrame::CaretPosition
+nsIFrame::GetExtremeCaretPosition(bool aStart)
+{
+ CaretPosition result;
+
+ FrameTarget targetFrame = DrillDownToSelectionFrame(this, !aStart, 0);
+ FrameContentRange range = GetRangeForFrame(targetFrame.frame);
+ result.mResultContent = range.content;
+ result.mContentOffset = aStart ? range.start : range.end;
+ return result;
+}
+
+// Find the first (or last) descendant of the given frame
+// which is either a block frame or a BRFrame.
+static nsContentAndOffset
+FindBlockFrameOrBR(nsIFrame* aFrame, nsDirection aDirection)
+{
+ nsContentAndOffset result;
+ result.mContent = nullptr;
+ result.mOffset = 0;
+
+ if (aFrame->IsGeneratedContentFrame())
+ return result;
+
+ // Treat form controls as inline leaves
+ // XXX we really need a way to determine whether a frame is inline-level
+ nsIFormControlFrame* fcf = do_QueryFrame(aFrame);
+ if (fcf)
+ return result;
+
+ // Check the frame itself
+ // Fall through block-in-inline split frames because their mContent is
+ // the content of the inline frames they were created from. The
+ // first/last child of such frames is the real block frame we're
+ // looking for.
+ if ((nsLayoutUtils::GetAsBlock(aFrame) &&
+ !(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT)) ||
+ aFrame->GetType() == nsGkAtoms::brFrame) {
+ nsIContent* content = aFrame->GetContent();
+ result.mContent = content->GetParent();
+ // In some cases (bug 310589, bug 370174) we end up here with a null content.
+ // This probably shouldn't ever happen, but since it sometimes does, we want
+ // to avoid crashing here.
+ NS_ASSERTION(result.mContent, "Unexpected orphan content");
+ if (result.mContent)
+ result.mOffset = result.mContent->IndexOf(content) +
+ (aDirection == eDirPrevious ? 1 : 0);
+ return result;
+ }
+
+ // If this is a preformatted text frame, see if it ends with a newline
+ if (aFrame->HasSignificantTerminalNewline()) {
+ int32_t startOffset, endOffset;
+ aFrame->GetOffsets(startOffset, endOffset);
+ result.mContent = aFrame->GetContent();
+ result.mOffset = endOffset - (aDirection == eDirPrevious ? 0 : 1);
+ return result;
+ }
+
+ // Iterate over children and call ourselves recursively
+ if (aDirection == eDirPrevious) {
+ nsIFrame* child = aFrame->GetChildList(nsIFrame::kPrincipalList).LastChild();
+ while(child && !result.mContent) {
+ result = FindBlockFrameOrBR(child, aDirection);
+ child = child->GetPrevSibling();
+ }
+ } else { // eDirNext
+ nsIFrame* child = aFrame->PrincipalChildList().FirstChild();
+ while(child && !result.mContent) {
+ result = FindBlockFrameOrBR(child, aDirection);
+ child = child->GetNextSibling();
+ }
+ }
+ return result;
+}
+
+nsresult
+nsIFrame::PeekOffsetParagraph(nsPeekOffsetStruct *aPos)
+{
+ nsIFrame* frame = this;
+ nsContentAndOffset blockFrameOrBR;
+ blockFrameOrBR.mContent = nullptr;
+ bool reachedBlockAncestor = false;
+
+ // Go through containing frames until reaching a block frame.
+ // In each step, search the previous (or next) siblings for the closest
+ // "stop frame" (a block frame or a BRFrame).
+ // If found, set it to be the selection boundray and abort.
+
+ if (aPos->mDirection == eDirPrevious) {
+ while (!reachedBlockAncestor) {
+ nsIFrame* parent = frame->GetParent();
+ // Treat a frame associated with the root content as if it were a block frame.
+ if (!frame->mContent || !frame->mContent->GetParent()) {
+ reachedBlockAncestor = true;
+ break;
+ }
+ nsIFrame* sibling = frame->GetPrevSibling();
+ while (sibling && !blockFrameOrBR.mContent) {
+ blockFrameOrBR = FindBlockFrameOrBR(sibling, eDirPrevious);
+ sibling = sibling->GetPrevSibling();
+ }
+ if (blockFrameOrBR.mContent) {
+ aPos->mResultContent = blockFrameOrBR.mContent;
+ aPos->mContentOffset = blockFrameOrBR.mOffset;
+ break;
+ }
+ frame = parent;
+ reachedBlockAncestor = (nsLayoutUtils::GetAsBlock(frame) != nullptr);
+ }
+ if (reachedBlockAncestor) { // no "stop frame" found
+ aPos->mResultContent = frame->GetContent();
+ aPos->mContentOffset = 0;
+ }
+ } else { // eDirNext
+ while (!reachedBlockAncestor) {
+ nsIFrame* parent = frame->GetParent();
+ // Treat a frame associated with the root content as if it were a block frame.
+ if (!frame->mContent || !frame->mContent->GetParent()) {
+ reachedBlockAncestor = true;
+ break;
+ }
+ nsIFrame* sibling = frame;
+ while (sibling && !blockFrameOrBR.mContent) {
+ blockFrameOrBR = FindBlockFrameOrBR(sibling, eDirNext);
+ sibling = sibling->GetNextSibling();
+ }
+ if (blockFrameOrBR.mContent) {
+ aPos->mResultContent = blockFrameOrBR.mContent;
+ aPos->mContentOffset = blockFrameOrBR.mOffset;
+ break;
+ }
+ frame = parent;
+ reachedBlockAncestor = (nsLayoutUtils::GetAsBlock(frame) != nullptr);
+ }
+ if (reachedBlockAncestor) { // no "stop frame" found
+ aPos->mResultContent = frame->GetContent();
+ if (aPos->mResultContent)
+ aPos->mContentOffset = aPos->mResultContent->GetChildCount();
+ }
+ }
+ return NS_OK;
+}
+
+// Determine movement direction relative to frame
+static bool IsMovingInFrameDirection(nsIFrame* frame, nsDirection aDirection, bool aVisual)
+{
+ bool isReverseDirection = aVisual && IsReversedDirectionFrame(frame);
+ return aDirection == (isReverseDirection ? eDirPrevious : eDirNext);
+}
+
+nsresult
+nsIFrame::PeekOffset(nsPeekOffsetStruct* aPos)
+{
+ if (!aPos)
+ return NS_ERROR_NULL_POINTER;
+ nsresult result = NS_ERROR_FAILURE;
+
+ if (mState & NS_FRAME_IS_DIRTY)
+ return NS_ERROR_UNEXPECTED;
+
+ // Translate content offset to be relative to frame
+ FrameContentRange range = GetRangeForFrame(this);
+ int32_t offset = aPos->mStartOffset - range.start;
+ nsIFrame* current = this;
+
+ switch (aPos->mAmount) {
+ case eSelectCharacter:
+ case eSelectCluster:
+ {
+ bool eatingNonRenderableWS = false;
+ nsIFrame::FrameSearchResult peekSearchState = CONTINUE;
+ bool jumpedLine = false;
+ bool movedOverNonSelectableText = false;
+
+ while (peekSearchState != FOUND) {
+ bool movingInFrameDirection =
+ IsMovingInFrameDirection(current, aPos->mDirection, aPos->mVisual);
+
+ if (eatingNonRenderableWS)
+ peekSearchState = current->PeekOffsetNoAmount(movingInFrameDirection, &offset);
+ else
+ peekSearchState = current->PeekOffsetCharacter(movingInFrameDirection, &offset,
+ aPos->mAmount == eSelectCluster);
+
+ movedOverNonSelectableText |= (peekSearchState == CONTINUE_UNSELECTABLE);
+
+ if (peekSearchState != FOUND) {
+ bool movedOverNonSelectable = false;
+ result =
+ current->GetFrameFromDirection(aPos->mDirection, aPos->mVisual,
+ aPos->mJumpLines, aPos->mScrollViewStop,
+ &current, &offset, &jumpedLine,
+ &movedOverNonSelectable);
+ if (NS_FAILED(result))
+ return result;
+
+ // If we jumped lines, it's as if we found a character, but we still need
+ // to eat non-renderable content on the new line.
+ if (jumpedLine)
+ eatingNonRenderableWS = true;
+
+ // Remember if we moved over non-selectable text when finding another frame.
+ if (movedOverNonSelectable) {
+ movedOverNonSelectableText = true;
+ }
+ }
+
+ // Found frame, but because we moved over non selectable text we want the offset
+ // to be at the frame edge. Note that if we are extending the selection, this
+ // doesn't matter.
+ if (peekSearchState == FOUND && movedOverNonSelectableText &&
+ !aPos->mExtend)
+ {
+ int32_t start, end;
+ current->GetOffsets(start, end);
+ offset = aPos->mDirection == eDirNext ? 0 : end - start;
+ }
+ }
+
+ // Set outputs
+ range = GetRangeForFrame(current);
+ aPos->mResultFrame = current;
+ aPos->mResultContent = range.content;
+ // Output offset is relative to content, not frame
+ aPos->mContentOffset = offset < 0 ? range.end : range.start + offset;
+ // If we're dealing with a text frame and moving backward positions us at
+ // the end of that line, decrease the offset by one to make sure that
+ // we're placed before the linefeed character on the previous line.
+ if (offset < 0 && jumpedLine &&
+ aPos->mDirection == eDirPrevious &&
+ current->HasSignificantTerminalNewline()) {
+ --aPos->mContentOffset;
+ }
+
+ break;
+ }
+ case eSelectWordNoSpace:
+ // eSelectWordNoSpace means that we should not be eating any whitespace when
+ // moving to the adjacent word. This means that we should set aPos->
+ // mWordMovementType to eEndWord if we're moving forwards, and to eStartWord
+ // if we're moving backwards.
+ if (aPos->mDirection == eDirPrevious) {
+ aPos->mWordMovementType = eStartWord;
+ } else {
+ aPos->mWordMovementType = eEndWord;
+ }
+ // Intentionally fall through the eSelectWord case.
+ MOZ_FALLTHROUGH;
+ case eSelectWord:
+ {
+ // wordSelectEatSpace means "are we looking for a boundary between whitespace
+ // and non-whitespace (in the direction we're moving in)".
+ // It is true when moving forward and looking for a beginning of a word, or
+ // when moving backwards and looking for an end of a word.
+ bool wordSelectEatSpace;
+ if (aPos->mWordMovementType != eDefaultBehavior) {
+ // aPos->mWordMovementType possible values:
+ // eEndWord: eat the space if we're moving backwards
+ // eStartWord: eat the space if we're moving forwards
+ wordSelectEatSpace = ((aPos->mWordMovementType == eEndWord) == (aPos->mDirection == eDirPrevious));
+ }
+ else {
+ // Use the hidden preference which is based on operating system behavior.
+ // This pref only affects whether moving forward by word should go to the end of this word or start of the next word.
+ // When going backwards, the start of the word is always used, on every operating system.
+ wordSelectEatSpace = aPos->mDirection == eDirNext &&
+ Preferences::GetBool("layout.word_select.eat_space_to_next_word");
+ }
+
+ // mSawBeforeType means "we already saw characters of the type
+ // before the boundary we're looking for". Examples:
+ // 1. If we're moving forward, looking for a word beginning (i.e. a boundary
+ // between whitespace and non-whitespace), then eatingWS==true means
+ // "we already saw some whitespace".
+ // 2. If we're moving backward, looking for a word beginning (i.e. a boundary
+ // between non-whitespace and whitespace), then eatingWS==true means
+ // "we already saw some non-whitespace".
+ PeekWordState state;
+ int32_t offsetAdjustment = 0;
+ bool done = false;
+ while (!done) {
+ bool movingInFrameDirection =
+ IsMovingInFrameDirection(current, aPos->mDirection, aPos->mVisual);
+
+ done = current->PeekOffsetWord(movingInFrameDirection, wordSelectEatSpace,
+ aPos->mIsKeyboardSelect, &offset, &state) == FOUND;
+
+ if (!done) {
+ nsIFrame* nextFrame;
+ int32_t nextFrameOffset;
+ bool jumpedLine, movedOverNonSelectableText;
+ result =
+ current->GetFrameFromDirection(aPos->mDirection, aPos->mVisual,
+ aPos->mJumpLines, aPos->mScrollViewStop,
+ &nextFrame, &nextFrameOffset, &jumpedLine,
+ &movedOverNonSelectableText);
+ // We can't jump lines if we're looking for whitespace following
+ // non-whitespace, and we already encountered non-whitespace.
+ if (NS_FAILED(result) ||
+ (jumpedLine && !wordSelectEatSpace && state.mSawBeforeType)) {
+ done = true;
+ // If we've crossed the line boundary, check to make sure that we
+ // have not consumed a trailing newline as whitesapce if it's significant.
+ if (jumpedLine && wordSelectEatSpace &&
+ current->HasSignificantTerminalNewline()) {
+ offsetAdjustment = -1;
+ }
+ } else {
+ if (jumpedLine) {
+ state.mContext.Truncate();
+ }
+ current = nextFrame;
+ offset = nextFrameOffset;
+ // Jumping a line is equivalent to encountering whitespace
+ if (wordSelectEatSpace && jumpedLine)
+ state.SetSawBeforeType();
+ }
+ }
+ }
+
+ // Set outputs
+ range = GetRangeForFrame(current);
+ aPos->mResultFrame = current;
+ aPos->mResultContent = range.content;
+ // Output offset is relative to content, not frame
+ aPos->mContentOffset = (offset < 0 ? range.end : range.start + offset) + offsetAdjustment;
+ break;
+ }
+ case eSelectLine :
+ {
+ nsAutoLineIterator iter;
+ nsIFrame *blockFrame = this;
+
+ while (NS_FAILED(result)){
+ int32_t thisLine = nsFrame::GetLineNumber(blockFrame, aPos->mScrollViewStop, &blockFrame);
+ if (thisLine < 0)
+ return NS_ERROR_FAILURE;
+ iter = blockFrame->GetLineIterator();
+ NS_ASSERTION(iter, "GetLineNumber() succeeded but no block frame?");
+ result = NS_OK;
+
+ int edgeCase = 0; // no edge case. this should look at thisLine
+
+ bool doneLooping = false; // tells us when no more block frames hit.
+ // this part will find a frame or a block frame. if it's a block frame
+ // it will "drill down" to find a viable frame or it will return an error.
+ nsIFrame *lastFrame = this;
+ do {
+ result = nsFrame::GetNextPrevLineFromeBlockFrame(PresContext(),
+ aPos,
+ blockFrame,
+ thisLine,
+ edgeCase); // start from thisLine
+
+ // we came back to same spot! keep going
+ if (NS_SUCCEEDED(result) &&
+ (!aPos->mResultFrame || aPos->mResultFrame == lastFrame)) {
+ aPos->mResultFrame = nullptr;
+ if (aPos->mDirection == eDirPrevious)
+ thisLine--;
+ else
+ thisLine++;
+ } else // if failure or success with different frame.
+ doneLooping = true; // do not continue with while loop
+
+ lastFrame = aPos->mResultFrame; // set last frame
+
+ // make sure block element is not the same as the one we had before
+ if (NS_SUCCEEDED(result) &&
+ aPos->mResultFrame &&
+ blockFrame != aPos->mResultFrame) {
+ /* SPECIAL CHECK FOR TABLE NAVIGATION
+ tables need to navigate also and the frame that supports it is
+ nsTableRowGroupFrame which is INSIDE nsTableWrapperFrame.
+ If we have stumbled onto an nsTableWrapperFrame we need to drill
+ into nsTableRowGroup if we hit a header or footer that's ok just
+ go into them.
+ */
+ bool searchTableBool = false;
+ if (aPos->mResultFrame->GetType() == nsGkAtoms::tableWrapperFrame ||
+ aPos->mResultFrame->GetType() == nsGkAtoms::tableCellFrame) {
+ nsIFrame* frame = aPos->mResultFrame->PrincipalChildList().FirstChild();
+ // got the table frame now
+ // ok time to drill down to find iterator
+ while (frame) {
+ iter = frame->GetLineIterator();
+ if (iter) {
+ aPos->mResultFrame = frame;
+ searchTableBool = true;
+ result = NS_OK;
+ break; // while(frame)
+ }
+ result = NS_ERROR_FAILURE;
+ frame = frame->PrincipalChildList().FirstChild();
+ }
+ }
+
+ if (!searchTableBool) {
+ iter = aPos->mResultFrame->GetLineIterator();
+ result = iter ? NS_OK : NS_ERROR_FAILURE;
+ }
+
+ // we've struck another block element!
+ if (NS_SUCCEEDED(result) && iter) {
+ doneLooping = false;
+ if (aPos->mDirection == eDirPrevious)
+ edgeCase = 1; // far edge, search from end backwards
+ else
+ edgeCase = -1; // near edge search from beginning onwards
+ thisLine = 0; // this line means nothing now.
+ // everything else means something so keep looking "inside" the block
+ blockFrame = aPos->mResultFrame;
+ } else {
+ // THIS is to mean that everything is ok to the containing while loop
+ result = NS_OK;
+ break;
+ }
+ }
+ } while (!doneLooping);
+ }
+ return result;
+ }
+
+ case eSelectParagraph:
+ return PeekOffsetParagraph(aPos);
+
+ case eSelectBeginLine:
+ case eSelectEndLine:
+ {
+ // Adjusted so that the caret can't get confused when content changes
+ nsIFrame* blockFrame = AdjustFrameForSelectionStyles(this);
+ int32_t thisLine = nsFrame::GetLineNumber(blockFrame, aPos->mScrollViewStop, &blockFrame);
+ if (thisLine < 0)
+ return NS_ERROR_FAILURE;
+ nsAutoLineIterator it = blockFrame->GetLineIterator();
+ NS_ASSERTION(it, "GetLineNumber() succeeded but no block frame?");
+
+ int32_t lineFrameCount;
+ nsIFrame *firstFrame;
+ nsRect usedRect;
+ nsIFrame* baseFrame = nullptr;
+ bool endOfLine = (eSelectEndLine == aPos->mAmount);
+
+ if (aPos->mVisual && PresContext()->BidiEnabled()) {
+ bool lineIsRTL = it->GetDirection();
+ bool isReordered;
+ nsIFrame *lastFrame;
+ result = it->CheckLineOrder(thisLine, &isReordered, &firstFrame, &lastFrame);
+ baseFrame = endOfLine ? lastFrame : firstFrame;
+ if (baseFrame) {
+ bool frameIsRTL =
+ (nsBidiPresUtils::FrameDirection(baseFrame) == NSBIDI_RTL);
+ // If the direction of the frame on the edge is opposite to
+ // that of the line, we'll need to drill down to its opposite
+ // end, so reverse endOfLine.
+ if (frameIsRTL != lineIsRTL) {
+ endOfLine = !endOfLine;
+ }
+ }
+ } else {
+ it->GetLine(thisLine, &firstFrame, &lineFrameCount, usedRect);
+
+ nsIFrame* frame = firstFrame;
+ for (int32_t count = lineFrameCount; count;
+ --count, frame = frame->GetNextSibling()) {
+ if (!frame->IsGeneratedContentFrame()) {
+ // When jumping to the end of the line with the "end" key,
+ // skip over brFrames
+ if (endOfLine && lineFrameCount > 1 &&
+ frame->GetType() == nsGkAtoms::brFrame) {
+ continue;
+ }
+ baseFrame = frame;
+ if (!endOfLine)
+ break;
+ }
+ }
+ }
+ if (!baseFrame)
+ return NS_ERROR_FAILURE;
+ FrameTarget targetFrame = DrillDownToSelectionFrame(baseFrame,
+ endOfLine, 0);
+ FrameContentRange range = GetRangeForFrame(targetFrame.frame);
+ aPos->mResultContent = range.content;
+ aPos->mContentOffset = endOfLine ? range.end : range.start;
+ if (endOfLine && targetFrame.frame->HasSignificantTerminalNewline()) {
+ // Do not position the caret after the terminating newline if we're
+ // trying to move to the end of line (see bug 596506)
+ --aPos->mContentOffset;
+ }
+ aPos->mResultFrame = targetFrame.frame;
+ aPos->mAttach = aPos->mContentOffset == range.start ?
+ CARET_ASSOCIATE_AFTER : CARET_ASSOCIATE_BEFORE;
+ if (!range.content)
+ return NS_ERROR_FAILURE;
+ return NS_OK;
+ }
+
+ default:
+ {
+ NS_ASSERTION(false, "Invalid amount");
+ return NS_ERROR_FAILURE;
+ }
+ }
+ return NS_OK;
+}
+
+nsIFrame::FrameSearchResult
+nsFrame::PeekOffsetNoAmount(bool aForward, int32_t* aOffset)
+{
+ NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range");
+ // Sure, we can stop right here.
+ return FOUND;
+}
+
+nsIFrame::FrameSearchResult
+nsFrame::PeekOffsetCharacter(bool aForward, int32_t* aOffset,
+ bool aRespectClusters)
+{
+ NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range");
+ int32_t startOffset = *aOffset;
+ // A negative offset means "end of frame", which in our case means offset 1.
+ if (startOffset < 0)
+ startOffset = 1;
+ if (aForward == (startOffset == 0)) {
+ // We're before the frame and moving forward, or after it and moving backwards:
+ // skip to the other side and we're done.
+ *aOffset = 1 - startOffset;
+ return FOUND;
+ }
+ return CONTINUE;
+}
+
+nsIFrame::FrameSearchResult
+nsFrame::PeekOffsetWord(bool aForward,
+ bool aWordSelectEatSpace,
+ bool aIsKeyboardSelect,
+ int32_t* aOffset,
+ PeekWordState* aState)
+{
+ NS_ASSERTION (aOffset && *aOffset <= 1, "aOffset out of range");
+ int32_t startOffset = *aOffset;
+ // This isn't text, so truncate the context
+ aState->mContext.Truncate();
+ if (startOffset < 0)
+ startOffset = 1;
+ if (aForward == (startOffset == 0)) {
+ // We're before the frame and moving forward, or after it and moving backwards.
+ // If we're looking for non-whitespace, we found it (without skipping this frame).
+ if (!aState->mAtStart) {
+ if (aState->mLastCharWasPunctuation) {
+ // We're not punctuation, so this is a punctuation boundary.
+ if (BreakWordBetweenPunctuation(aState, aForward, false, false, aIsKeyboardSelect))
+ return FOUND;
+ } else {
+ // This is not a punctuation boundary.
+ if (aWordSelectEatSpace && aState->mSawBeforeType)
+ return FOUND;
+ }
+ }
+ // Otherwise skip to the other side and note that we encountered non-whitespace.
+ *aOffset = 1 - startOffset;
+ aState->Update(false, // not punctuation
+ false // not whitespace
+ );
+ if (!aWordSelectEatSpace)
+ aState->SetSawBeforeType();
+ }
+ return CONTINUE;
+}
+
+bool
+nsFrame::BreakWordBetweenPunctuation(const PeekWordState* aState,
+ bool aForward,
+ bool aPunctAfter, bool aWhitespaceAfter,
+ bool aIsKeyboardSelect)
+{
+ NS_ASSERTION(aPunctAfter != aState->mLastCharWasPunctuation,
+ "Call this only at punctuation boundaries");
+ if (aState->mLastCharWasWhitespace) {
+ // We always stop between whitespace and punctuation
+ return true;
+ }
+ if (!Preferences::GetBool("layout.word_select.stop_at_punctuation")) {
+ // When this pref is false, we never stop at a punctuation boundary unless
+ // it's followed by whitespace (in the relevant direction).
+ return aWhitespaceAfter;
+ }
+ if (!aIsKeyboardSelect) {
+ // mouse caret movement (e.g. word selection) always stops at every punctuation boundary
+ return true;
+ }
+ bool afterPunct = aForward ? aState->mLastCharWasPunctuation : aPunctAfter;
+ if (!afterPunct) {
+ // keyboard caret movement only stops after punctuation (in content order)
+ return false;
+ }
+ // Stop only if we've seen some non-punctuation since the last whitespace;
+ // don't stop after punctuation that follows whitespace.
+ return aState->mSeenNonPunctuationSinceWhitespace;
+}
+
+nsresult
+nsFrame::CheckVisibility(nsPresContext* , int32_t , int32_t , bool , bool *, bool *)
+{
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+
+int32_t
+nsFrame::GetLineNumber(nsIFrame *aFrame, bool aLockScroll, nsIFrame** aContainingBlock)
+{
+ NS_ASSERTION(aFrame, "null aFrame");
+ nsFrameManager* frameManager = aFrame->PresContext()->FrameManager();
+ nsIFrame *blockFrame = aFrame;
+ nsIFrame *thisBlock;
+ nsAutoLineIterator it;
+ nsresult result = NS_ERROR_FAILURE;
+ while (NS_FAILED(result) && blockFrame)
+ {
+ thisBlock = blockFrame;
+ if (thisBlock->GetStateBits() & NS_FRAME_OUT_OF_FLOW) {
+ //if we are searching for a frame that is not in flow we will not find it.
+ //we must instead look for its placeholder
+ if (thisBlock->GetStateBits() & NS_FRAME_IS_OVERFLOW_CONTAINER) {
+ // abspos continuations don't have placeholders, get the fif
+ thisBlock = thisBlock->FirstInFlow();
+ }
+ thisBlock = frameManager->GetPlaceholderFrameFor(thisBlock);
+ if (!thisBlock)
+ return -1;
+ }
+ blockFrame = thisBlock->GetParent();
+ result = NS_OK;
+ if (blockFrame) {
+ if (aLockScroll && blockFrame->GetType() == nsGkAtoms::scrollFrame)
+ return -1;
+ it = blockFrame->GetLineIterator();
+ if (!it)
+ result = NS_ERROR_FAILURE;
+ }
+ }
+ if (!blockFrame || !it)
+ return -1;
+
+ if (aContainingBlock)
+ *aContainingBlock = blockFrame;
+ return it->FindLineContaining(thisBlock);
+}
+
+nsresult
+nsIFrame::GetFrameFromDirection(nsDirection aDirection, bool aVisual,
+ bool aJumpLines, bool aScrollViewStop,
+ nsIFrame** aOutFrame, int32_t* aOutOffset,
+ bool* aOutJumpedLine, bool* aOutMovedOverNonSelectableText)
+{
+ nsresult result;
+
+ if (!aOutFrame || !aOutOffset || !aOutJumpedLine)
+ return NS_ERROR_NULL_POINTER;
+
+ nsPresContext* presContext = PresContext();
+ *aOutFrame = nullptr;
+ *aOutOffset = 0;
+ *aOutJumpedLine = false;
+ *aOutMovedOverNonSelectableText = false;
+
+ // Find the prev/next selectable frame
+ bool selectable = false;
+ nsIFrame *traversedFrame = this;
+ while (!selectable) {
+ nsIFrame *blockFrame;
+
+ int32_t thisLine = nsFrame::GetLineNumber(traversedFrame, aScrollViewStop, &blockFrame);
+ if (thisLine < 0)
+ return NS_ERROR_FAILURE;
+
+ nsAutoLineIterator it = blockFrame->GetLineIterator();
+ NS_ASSERTION(it, "GetLineNumber() succeeded but no block frame?");
+
+ bool atLineEdge;
+ nsIFrame *firstFrame;
+ nsIFrame *lastFrame;
+ if (aVisual && presContext->BidiEnabled()) {
+ bool lineIsRTL = it->GetDirection();
+ bool isReordered;
+ result = it->CheckLineOrder(thisLine, &isReordered, &firstFrame, &lastFrame);
+ nsIFrame** framePtr = aDirection == eDirPrevious ? &firstFrame : &lastFrame;
+ if (*framePtr) {
+ bool frameIsRTL =
+ (nsBidiPresUtils::FrameDirection(*framePtr) == NSBIDI_RTL);
+ if ((frameIsRTL == lineIsRTL) == (aDirection == eDirPrevious)) {
+ nsFrame::GetFirstLeaf(presContext, framePtr);
+ } else {
+ nsFrame::GetLastLeaf(presContext, framePtr);
+ }
+ atLineEdge = *framePtr == traversedFrame;
+ } else {
+ atLineEdge = true;
+ }
+ } else {
+ nsRect nonUsedRect;
+ int32_t lineFrameCount;
+ result = it->GetLine(thisLine, &firstFrame, &lineFrameCount,
+ nonUsedRect);
+ if (NS_FAILED(result))
+ return result;
+
+ if (aDirection == eDirPrevious) {
+ nsFrame::GetFirstLeaf(presContext, &firstFrame);
+ atLineEdge = firstFrame == traversedFrame;
+ } else { // eDirNext
+ lastFrame = firstFrame;
+ for (;lineFrameCount > 1;lineFrameCount --){
+ result = it->GetNextSiblingOnLine(lastFrame, thisLine);
+ if (NS_FAILED(result) || !lastFrame){
+ NS_ERROR("should not be reached nsFrame");
+ return NS_ERROR_FAILURE;
+ }
+ }
+ nsFrame::GetLastLeaf(presContext, &lastFrame);
+ atLineEdge = lastFrame == traversedFrame;
+ }
+ }
+
+ if (atLineEdge) {
+ *aOutJumpedLine = true;
+ if (!aJumpLines)
+ return NS_ERROR_FAILURE; //we are done. cannot jump lines
+ }
+
+ nsCOMPtr<nsIFrameEnumerator> frameTraversal;
+ result = NS_NewFrameTraversal(getter_AddRefs(frameTraversal),
+ presContext, traversedFrame,
+ eLeaf,
+ aVisual && presContext->BidiEnabled(),
+ aScrollViewStop,
+ true, // aFollowOOFs
+ false // aSkipPopupChecks
+ );
+ if (NS_FAILED(result))
+ return result;
+
+ if (aDirection == eDirNext)
+ frameTraversal->Next();
+ else
+ frameTraversal->Prev();
+
+ traversedFrame = frameTraversal->CurrentItem();
+
+ // Skip anonymous elements, but watch out for generated content
+ if (!traversedFrame ||
+ (!traversedFrame->IsGeneratedContentFrame() &&
+ traversedFrame->GetContent()->IsRootOfNativeAnonymousSubtree())) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // Skip brFrames, but only if they are not the only frame in the line
+ if (atLineEdge && aDirection == eDirPrevious &&
+ traversedFrame->GetType() == nsGkAtoms::brFrame) {
+ int32_t lineFrameCount;
+ nsIFrame *currentBlockFrame, *currentFirstFrame;
+ nsRect usedRect;
+ int32_t currentLine = nsFrame::GetLineNumber(traversedFrame, aScrollViewStop, &currentBlockFrame);
+ nsAutoLineIterator iter = currentBlockFrame->GetLineIterator();
+ result = iter->GetLine(currentLine, &currentFirstFrame, &lineFrameCount, usedRect);
+ if (NS_FAILED(result)) {
+ return result;
+ }
+ if (lineFrameCount > 1) {
+ continue;
+ }
+ }
+
+ traversedFrame->IsSelectable(&selectable, nullptr);
+ if (!selectable) {
+ *aOutMovedOverNonSelectableText = true;
+ }
+ } // while (!selectable)
+
+ *aOutOffset = (aDirection == eDirNext) ? 0 : -1;
+
+ if (aVisual && IsReversedDirectionFrame(traversedFrame)) {
+ // The new frame is reverse-direction, go to the other end
+ *aOutOffset = -1 - *aOutOffset;
+ }
+ *aOutFrame = traversedFrame;
+ return NS_OK;
+}
+
+nsView* nsIFrame::GetClosestView(nsPoint* aOffset) const
+{
+ nsPoint offset(0,0);
+ for (const nsIFrame *f = this; f; f = f->GetParent()) {
+ if (f->HasView()) {
+ if (aOffset)
+ *aOffset = offset;
+ return f->GetView();
+ }
+ offset += f->GetPosition();
+ }
+
+ NS_NOTREACHED("No view on any parent? How did that happen?");
+ return nullptr;
+}
+
+
+/* virtual */ void
+nsFrame::ChildIsDirty(nsIFrame* aChild)
+{
+ NS_NOTREACHED("should never be called on a frame that doesn't inherit from "
+ "nsContainerFrame");
+}
+
+
+#ifdef ACCESSIBILITY
+a11y::AccType
+nsFrame::AccessibleType()
+{
+ if (IsTableCaption() && !GetRect().IsEmpty()) {
+ return a11y::eHTMLCaptionType;
+ }
+ return a11y::eNoType;
+}
+#endif
+
+NS_DECLARE_FRAME_PROPERTY_DELETABLE(OverflowAreasProperty, nsOverflowAreas)
+
+bool
+nsIFrame::ClearOverflowRects()
+{
+ if (mOverflow.mType == NS_FRAME_OVERFLOW_NONE) {
+ return false;
+ }
+ if (mOverflow.mType == NS_FRAME_OVERFLOW_LARGE) {
+ Properties().Delete(OverflowAreasProperty());
+ }
+ mOverflow.mType = NS_FRAME_OVERFLOW_NONE;
+ return true;
+}
+
+/** Create or retrieve the previously stored overflow area, if the frame does
+ * not overflow and no creation is required return nullptr.
+ * @return pointer to the overflow area rectangle
+ */
+nsOverflowAreas*
+nsIFrame::GetOverflowAreasProperty()
+{
+ FrameProperties props = Properties();
+ nsOverflowAreas* overflow = props.Get(OverflowAreasProperty());
+
+ if (overflow) {
+ return overflow; // the property already exists
+ }
+
+ // The property isn't set yet, so allocate a new rect, set the property,
+ // and return the newly allocated rect
+ overflow = new nsOverflowAreas;
+ props.Set(OverflowAreasProperty(), overflow);
+ return overflow;
+}
+
+/** Set the overflowArea rect, storing it as deltas or a separate rect
+ * depending on its size in relation to the primary frame rect.
+ */
+bool
+nsIFrame::SetOverflowAreas(const nsOverflowAreas& aOverflowAreas)
+{
+ if (mOverflow.mType == NS_FRAME_OVERFLOW_LARGE) {
+ nsOverflowAreas* overflow = Properties().Get(OverflowAreasProperty());
+ bool changed = *overflow != aOverflowAreas;
+ *overflow = aOverflowAreas;
+
+ // Don't bother with converting to the deltas form if we already
+ // have a property.
+ return changed;
+ }
+
+ const nsRect& vis = aOverflowAreas.VisualOverflow();
+ uint32_t l = -vis.x, // left edge: positive delta is leftwards
+ t = -vis.y, // top: positive is upwards
+ r = vis.XMost() - mRect.width, // right: positive is rightwards
+ b = vis.YMost() - mRect.height; // bottom: positive is downwards
+ if (aOverflowAreas.ScrollableOverflow().IsEqualEdges(nsRect(nsPoint(0, 0), GetSize())) &&
+ l <= NS_FRAME_OVERFLOW_DELTA_MAX &&
+ t <= NS_FRAME_OVERFLOW_DELTA_MAX &&
+ r <= NS_FRAME_OVERFLOW_DELTA_MAX &&
+ b <= NS_FRAME_OVERFLOW_DELTA_MAX &&
+ // we have to check these against zero because we *never* want to
+ // set a frame as having no overflow in this function. This is
+ // because FinishAndStoreOverflow calls this function prior to
+ // SetRect based on whether the overflow areas match aNewSize.
+ // In the case where the overflow areas exactly match mRect but
+ // do not match aNewSize, we need to store overflow in a property
+ // so that our eventual SetRect/SetSize will know that it has to
+ // reset our overflow areas.
+ (l | t | r | b) != 0) {
+ VisualDeltas oldDeltas = mOverflow.mVisualDeltas;
+ // It's a "small" overflow area so we store the deltas for each edge
+ // directly in the frame, rather than allocating a separate rect.
+ // If they're all zero, that's fine; we're setting things to
+ // no-overflow.
+ mOverflow.mVisualDeltas.mLeft = l;
+ mOverflow.mVisualDeltas.mTop = t;
+ mOverflow.mVisualDeltas.mRight = r;
+ mOverflow.mVisualDeltas.mBottom = b;
+ // There was no scrollable overflow before, and there isn't now.
+ return oldDeltas != mOverflow.mVisualDeltas;
+ } else {
+ bool changed = !aOverflowAreas.ScrollableOverflow().IsEqualEdges(nsRect(nsPoint(0, 0), GetSize())) ||
+ !aOverflowAreas.VisualOverflow().IsEqualEdges(GetVisualOverflowFromDeltas());
+
+ // it's a large overflow area that we need to store as a property
+ mOverflow.mType = NS_FRAME_OVERFLOW_LARGE;
+ nsOverflowAreas* overflow = GetOverflowAreasProperty();
+ NS_ASSERTION(overflow, "should have created areas");
+ *overflow = aOverflowAreas;
+ return changed;
+ }
+}
+
+inline bool
+IsInlineFrame(nsIFrame *aFrame)
+{
+ nsIAtom *type = aFrame->GetType();
+ return type == nsGkAtoms::inlineFrame;
+}
+
+/**
+ * Compute the union of the border boxes of aFrame and its descendants,
+ * in aFrame's coordinate space (if aApplyTransform is false) or its
+ * post-transform coordinate space (if aApplyTransform is true).
+ */
+static nsRect
+UnionBorderBoxes(nsIFrame* aFrame, bool aApplyTransform,
+ bool& aOutValid,
+ const nsSize* aSizeOverride = nullptr,
+ const nsOverflowAreas* aOverflowOverride = nullptr)
+{
+ const nsRect bounds(nsPoint(0, 0),
+ aSizeOverride ? *aSizeOverride : aFrame->GetSize());
+
+ // The SVG container frames do not maintain an accurate mRect.
+ // It will make the outline be larger than we expect, we need
+ // to make them narrow to their children's outline.
+ // aOutValid is set to false if the returned nsRect is not valid
+ // and should not be included in the outline rectangle.
+ aOutValid = !aFrame->IsFrameOfType(nsIFrame::eSVGContainer);
+
+ // Start from our border-box, transformed. See comment below about
+ // transform of children.
+ nsRect u;
+ bool doTransform = aApplyTransform && aFrame->IsTransformed();
+ if (doTransform) {
+ u = nsDisplayTransform::TransformRect(bounds, aFrame, &bounds);
+ } else {
+ u = bounds;
+ }
+
+ // Only iterate through the children if the overflow areas suggest
+ // that we might need to, and if the frame doesn't clip its overflow
+ // anyway.
+ if (aOverflowOverride) {
+ if (!doTransform &&
+ bounds.IsEqualEdges(aOverflowOverride->VisualOverflow()) &&
+ bounds.IsEqualEdges(aOverflowOverride->ScrollableOverflow())) {
+ return u;
+ }
+ } else {
+ if (!doTransform &&
+ bounds.IsEqualEdges(aFrame->GetVisualOverflowRect()) &&
+ bounds.IsEqualEdges(aFrame->GetScrollableOverflowRect())) {
+ return u;
+ }
+ }
+ const nsStyleDisplay* disp = aFrame->StyleDisplay();
+ nsIAtom* fType = aFrame->GetType();
+ if (nsFrame::ShouldApplyOverflowClipping(aFrame, disp) ||
+ fType == nsGkAtoms::scrollFrame ||
+ fType == nsGkAtoms::listControlFrame ||
+ fType == nsGkAtoms::svgOuterSVGFrame) {
+ return u;
+ }
+
+ const nsStyleEffects* effects = aFrame->StyleEffects();
+ Maybe<nsRect> clipPropClipRect =
+ aFrame->GetClipPropClipRect(disp, effects, bounds.Size());
+
+ // Iterate over all children except pop-ups.
+ const nsIFrame::ChildListIDs skip(nsIFrame::kPopupList |
+ nsIFrame::kSelectPopupList);
+ for (nsIFrame::ChildListIterator childLists(aFrame);
+ !childLists.IsDone(); childLists.Next()) {
+ if (skip.Contains(childLists.CurrentID())) {
+ continue;
+ }
+
+ nsFrameList children = childLists.CurrentList();
+ for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
+ nsIFrame* child = e.get();
+ // Note that passing |true| for aApplyTransform when
+ // child->Combines3DTransformWithAncestors() is incorrect if our
+ // aApplyTransform is false... but the opposite would be as
+ // well. This is because elements within a preserve-3d scene
+ // are always transformed up to the top of the scene. This
+ // means we don't have a mechanism for getting a transform up to
+ // an intermediate point within the scene. We choose to
+ // over-transform rather than under-transform because this is
+ // consistent with other overflow areas.
+ bool validRect = true;
+ nsRect childRect = UnionBorderBoxes(child, true, validRect) +
+ child->GetPosition();
+
+ if (!validRect) {
+ continue;
+ }
+
+ if (clipPropClipRect) {
+ // Intersect with the clip before transforming.
+ childRect.IntersectRect(childRect, *clipPropClipRect);
+ }
+
+ // Note that we transform each child separately according to
+ // aFrame's transform, and then union, which gives a different
+ // (smaller) result from unioning and then transforming the
+ // union. This doesn't match the way we handle overflow areas
+ // with 2-D transforms, though it does match the way we handle
+ // overflow areas in preserve-3d 3-D scenes.
+ if (doTransform && !child->Combines3DTransformWithAncestors()) {
+ childRect = nsDisplayTransform::TransformRect(childRect, aFrame, &bounds);
+ }
+
+ // If a SVGContainer has a non-SVGContainer child, we assign
+ // its child's outline to this SVGContainer directly.
+ if (!aOutValid && validRect) {
+ u = childRect;
+ aOutValid = true;
+ } else {
+ u.UnionRectEdges(u, childRect);
+ }
+ }
+ }
+
+ return u;
+}
+
+static void
+ComputeAndIncludeOutlineArea(nsIFrame* aFrame, nsOverflowAreas& aOverflowAreas,
+ const nsSize& aNewSize)
+{
+ const nsStyleOutline* outline = aFrame->StyleOutline();
+ const uint8_t outlineStyle = outline->mOutlineStyle;
+ if (outlineStyle == NS_STYLE_BORDER_STYLE_NONE) {
+ return;
+ }
+
+ nscoord width = outline->GetOutlineWidth();
+ if (width <= 0 && outlineStyle != NS_STYLE_BORDER_STYLE_AUTO) {
+ return;
+ }
+
+ // When the outline property is set on :-moz-anonymous-block or
+ // :-moz-anonymous-positioned-block pseudo-elements, it inherited
+ // that outline from the inline that was broken because it
+ // contained a block. In that case, we don't want a really wide
+ // outline if the block inside the inline is narrow, so union the
+ // actual contents of the anonymous blocks.
+ nsIFrame *frameForArea = aFrame;
+ do {
+ nsIAtom *pseudoType = frameForArea->StyleContext()->GetPseudo();
+ if (pseudoType != nsCSSAnonBoxes::mozAnonymousBlock &&
+ pseudoType != nsCSSAnonBoxes::mozAnonymousPositionedBlock)
+ break;
+ // If we're done, we really want it and all its later siblings.
+ frameForArea = frameForArea->PrincipalChildList().FirstChild();
+ NS_ASSERTION(frameForArea, "anonymous block with no children?");
+ } while (frameForArea);
+
+ // Find the union of the border boxes of all descendants, or in
+ // the block-in-inline case, all descendants we care about.
+ //
+ // Note that the interesting perspective-related cases are taken
+ // care of by the code that handles those issues for overflow
+ // calling FinishAndStoreOverflow again, which in turn calls this
+ // function again. We still need to deal with preserve-3d a bit.
+ nsRect innerRect;
+ bool validRect;
+ if (frameForArea == aFrame) {
+ innerRect = UnionBorderBoxes(aFrame, false, validRect, &aNewSize, &aOverflowAreas);
+ } else {
+ for (; frameForArea; frameForArea = frameForArea->GetNextSibling()) {
+ nsRect r(UnionBorderBoxes(frameForArea, true, validRect));
+
+ // Adjust for offsets transforms up to aFrame's pre-transform
+ // (i.e., normal) coordinate space; see comments in
+ // UnionBorderBoxes for some of the subtlety here.
+ for (nsIFrame *f = frameForArea, *parent = f->GetParent();
+ /* see middle of loop */;
+ f = parent, parent = f->GetParent()) {
+ r += f->GetPosition();
+ if (parent == aFrame) {
+ break;
+ }
+ if (parent->IsTransformed() && !f->Combines3DTransformWithAncestors()) {
+ r = nsDisplayTransform::TransformRect(r, parent);
+ }
+ }
+
+ innerRect.UnionRect(innerRect, r);
+ }
+ }
+
+ // Keep this code in sync with GetOutlineInnerRect in nsCSSRendering.cpp.
+ aFrame->Properties().Set(nsIFrame::OutlineInnerRectProperty(),
+ new nsRect(innerRect));
+ const nscoord offset = outline->mOutlineOffset;
+ nsRect outerRect(innerRect);
+ bool useOutlineAuto = false;
+ if (nsLayoutUtils::IsOutlineStyleAutoEnabled()) {
+ useOutlineAuto = outlineStyle == NS_STYLE_BORDER_STYLE_AUTO;
+ if (MOZ_UNLIKELY(useOutlineAuto)) {
+ nsPresContext* presContext = aFrame->PresContext();
+ nsITheme* theme = presContext->GetTheme();
+ if (theme && theme->ThemeSupportsWidget(presContext, aFrame,
+ NS_THEME_FOCUS_OUTLINE)) {
+ outerRect.Inflate(offset);
+ theme->GetWidgetOverflow(presContext->DeviceContext(), aFrame,
+ NS_THEME_FOCUS_OUTLINE, &outerRect);
+ } else {
+ useOutlineAuto = false;
+ }
+ }
+ }
+ if (MOZ_LIKELY(!useOutlineAuto)) {
+ outerRect.Inflate(width + offset);
+ }
+
+ nsRect& vo = aOverflowAreas.VisualOverflow();
+ vo.UnionRectEdges(vo, innerRect.Union(outerRect));
+}
+
+bool
+nsIFrame::FinishAndStoreOverflow(nsOverflowAreas& aOverflowAreas,
+ nsSize aNewSize, nsSize* aOldSize)
+{
+ NS_ASSERTION(FrameMaintainsOverflow(),
+ "Don't call - overflow rects not maintained on these SVG frames");
+
+ nsRect bounds(nsPoint(0, 0), aNewSize);
+ // Store the passed in overflow area if we are a preserve-3d frame or we have
+ // a transform, and it's not just the frame bounds.
+ if (Combines3DTransformWithAncestors() || IsTransformed()) {
+ if (!aOverflowAreas.VisualOverflow().IsEqualEdges(bounds) ||
+ !aOverflowAreas.ScrollableOverflow().IsEqualEdges(bounds)) {
+ nsOverflowAreas* initial =
+ Properties().Get(nsIFrame::InitialOverflowProperty());
+ if (!initial) {
+ Properties().Set(nsIFrame::InitialOverflowProperty(),
+ new nsOverflowAreas(aOverflowAreas));
+ } else if (initial != &aOverflowAreas) {
+ *initial = aOverflowAreas;
+ }
+ } else {
+ Properties().Delete(nsIFrame::InitialOverflowProperty());
+ }
+#ifdef DEBUG
+ Properties().Set(nsIFrame::DebugInitialOverflowPropertyApplied(), true);
+#endif
+ } else {
+#ifdef DEBUG
+ Properties().Delete(nsIFrame::DebugInitialOverflowPropertyApplied());
+#endif
+ }
+
+ // This is now called FinishAndStoreOverflow() instead of
+ // StoreOverflow() because frame-generic ways of adding overflow
+ // can happen here, e.g. CSS2 outline and native theme.
+ // If the overflow area width or height is nscoord_MAX, then a
+ // saturating union may have encounted an overflow, so the overflow may not
+ // contain the frame border-box. Don't warn in that case.
+ // Don't warn for SVG either, since SVG doesn't need the overflow area
+ // to contain the frame bounds.
+ NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
+ DebugOnly<nsRect*> r = &aOverflowAreas.Overflow(otype);
+ NS_ASSERTION(aNewSize.width == 0 || aNewSize.height == 0 ||
+ r->width == nscoord_MAX || r->height == nscoord_MAX ||
+ (mState & NS_FRAME_SVG_LAYOUT) ||
+ r->Contains(nsRect(nsPoint(0,0), aNewSize)),
+ "Computed overflow area must contain frame bounds");
+ }
+
+ // If we clip our children, clear accumulated overflow area. The
+ // children are actually clipped to the padding-box, but since the
+ // overflow area should include the entire border-box, just set it to
+ // the border-box here.
+ const nsStyleDisplay* disp = StyleDisplay();
+ NS_ASSERTION((disp->mOverflowY == NS_STYLE_OVERFLOW_CLIP) ==
+ (disp->mOverflowX == NS_STYLE_OVERFLOW_CLIP),
+ "If one overflow is clip, the other should be too");
+ if (nsFrame::ShouldApplyOverflowClipping(this, disp)) {
+ // The contents are actually clipped to the padding area
+ aOverflowAreas.SetAllTo(bounds);
+ }
+
+ // Overflow area must always include the frame's top-left and bottom-right,
+ // even if the frame rect is empty (so we can scroll to those positions).
+ // Pending a real fix for bug 426879, don't do this for inline frames
+ // with zero width.
+ // Do not do this for SVG either, since it will usually massively increase
+ // the area unnecessarily.
+ if ((aNewSize.width != 0 || !IsInlineFrame(this)) &&
+ !(GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
+ NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
+ nsRect& o = aOverflowAreas.Overflow(otype);
+ o.UnionRectEdges(o, bounds);
+ }
+ }
+
+ // Note that NS_STYLE_OVERFLOW_CLIP doesn't clip the frame background,
+ // so we add theme background overflow here so it's not clipped.
+ if (!::IsXULBoxWrapped(this) && IsThemed(disp)) {
+ nsRect r(bounds);
+ nsPresContext *presContext = PresContext();
+ if (presContext->GetTheme()->
+ GetWidgetOverflow(presContext->DeviceContext(), this,
+ disp->mAppearance, &r)) {
+ nsRect& vo = aOverflowAreas.VisualOverflow();
+ vo.UnionRectEdges(vo, r);
+ }
+ }
+
+ ComputeAndIncludeOutlineArea(this, aOverflowAreas, aNewSize);
+
+ // Nothing in here should affect scrollable overflow.
+ aOverflowAreas.VisualOverflow() =
+ ComputeEffectsRect(this, aOverflowAreas.VisualOverflow(), aNewSize);
+
+ // Absolute position clipping
+ const nsStyleEffects* effects = StyleEffects();
+ Maybe<nsRect> clipPropClipRect =
+ GetClipPropClipRect(disp, effects, aNewSize);
+ if (clipPropClipRect) {
+ NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
+ nsRect& o = aOverflowAreas.Overflow(otype);
+ o.IntersectRect(o, *clipPropClipRect);
+ }
+ }
+
+ /* If we're transformed, transform the overflow rect by the current transformation. */
+ bool hasTransform = IsTransformed();
+ nsSize oldSize = mRect.Size();
+ bool sizeChanged = ((aOldSize ? *aOldSize : oldSize) != aNewSize);
+
+ /* Since our size might not actually have been computed yet, we need to make sure that we use the
+ * correct dimensions by overriding the stored bounding rectangle with the value the caller has
+ * ensured us we'll use.
+ */
+ SetSize(aNewSize);
+
+ if (ChildrenHavePerspective() && sizeChanged) {
+ nsRect newBounds(nsPoint(0, 0), aNewSize);
+ RecomputePerspectiveChildrenOverflow(this);
+ }
+
+ if (hasTransform) {
+ Properties().Set(nsIFrame::PreTransformOverflowAreasProperty(),
+ new nsOverflowAreas(aOverflowAreas));
+
+ if (Combines3DTransformWithAncestors()) {
+ /* If we're a preserve-3d leaf frame, then our pre-transform overflow should be correct. Our
+ * post-transform overflow is empty though, because we only contribute to the overflow area
+ * of the preserve-3d root frame.
+ * If we're an intermediate frame then the pre-transform overflow should contain all our
+ * non-preserve-3d children, which is what we want. Again we have no post-transform overflow.
+ */
+ aOverflowAreas.SetAllTo(nsRect());
+ } else {
+ NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
+ nsRect& o = aOverflowAreas.Overflow(otype);
+ o = nsDisplayTransform::TransformRect(o, this);
+ }
+
+ /* If we're the root of the 3d context, then we want to include the overflow areas of all
+ * the participants. This won't have happened yet as the code above set their overflow
+ * area to empty. Manually collect these overflow areas now.
+ */
+ if (Extend3DContext()) {
+ ComputePreserve3DChildrenOverflow(aOverflowAreas);
+ }
+ }
+ } else {
+ Properties().Delete(nsIFrame::PreTransformOverflowAreasProperty());
+ }
+
+ /* Revert the size change in case some caller is depending on this. */
+ SetSize(oldSize);
+
+ bool anyOverflowChanged;
+ if (aOverflowAreas != nsOverflowAreas(bounds, bounds)) {
+ anyOverflowChanged = SetOverflowAreas(aOverflowAreas);
+ } else {
+ anyOverflowChanged = ClearOverflowRects();
+ }
+
+ if (anyOverflowChanged) {
+ nsSVGEffects::InvalidateDirectRenderingObservers(this);
+ }
+ return anyOverflowChanged;
+}
+
+void
+nsIFrame::RecomputePerspectiveChildrenOverflow(const nsIFrame* aStartFrame)
+{
+ nsIFrame::ChildListIterator lists(this);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ nsIFrame* child = childFrames.get();
+ if (!child->FrameMaintainsOverflow()) {
+ continue; // frame does not maintain overflow rects
+ }
+ if (child->HasPerspective()) {
+ nsOverflowAreas* overflow =
+ child->Properties().Get(nsIFrame::InitialOverflowProperty());
+ nsRect bounds(nsPoint(0, 0), child->GetSize());
+ if (overflow) {
+ nsOverflowAreas overflowCopy = *overflow;
+ child->FinishAndStoreOverflow(overflowCopy, bounds.Size());
+ } else {
+ nsOverflowAreas boundsOverflow;
+ boundsOverflow.SetAllTo(bounds);
+ child->FinishAndStoreOverflow(boundsOverflow, bounds.Size());
+ }
+ } else if (child->GetContainingBlock(SKIP_SCROLLED_FRAME) == aStartFrame) {
+ // If a frame is using perspective, then the size used to compute
+ // perspective-origin is the size of the frame belonging to its parent
+ // style context. We must find any descendant frames using our size
+ // (by recursing into frames that have the same containing block)
+ // to update their overflow rects too.
+ child->RecomputePerspectiveChildrenOverflow(aStartFrame);
+ }
+ }
+ }
+}
+
+void
+nsIFrame::ComputePreserve3DChildrenOverflow(nsOverflowAreas& aOverflowAreas)
+{
+ // Find all descendants that participate in the 3d context, and include their overflow.
+ // These descendants have an empty overflow, so won't have been included in the normal
+ // overflow calculation. Any children that don't participate have normal overflow,
+ // so will have been included already.
+
+ nsRect childVisual;
+ nsRect childScrollable;
+ nsIFrame::ChildListIterator lists(this);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ nsIFrame* child = childFrames.get();
+
+ // If this child participates in the 3d context, then take the pre-transform
+ // region (which contains all descendants that aren't participating in the 3d context)
+ // and transform it into the 3d context root coordinate space.
+ if (child->Combines3DTransformWithAncestors()) {
+ nsOverflowAreas childOverflow = child->GetOverflowAreasRelativeToSelf();
+
+ NS_FOR_FRAME_OVERFLOW_TYPES(otype) {
+ nsRect& o = childOverflow.Overflow(otype);
+ o = nsDisplayTransform::TransformRect(o, child);
+ }
+
+ aOverflowAreas.UnionWith(childOverflow);
+
+ // If this child also extends the 3d context, then recurse into it
+ // looking for more participants.
+ if (child->Extend3DContext()) {
+ child->ComputePreserve3DChildrenOverflow(aOverflowAreas);
+ }
+ }
+ }
+ }
+}
+
+uint32_t
+nsIFrame::GetDepthInFrameTree() const
+{
+ uint32_t result = 0;
+ for (nsContainerFrame* ancestor = GetParent(); ancestor;
+ ancestor = ancestor->GetParent()) {
+ result++;
+ }
+ return result;
+}
+
+void
+nsFrame::ConsiderChildOverflow(nsOverflowAreas& aOverflowAreas,
+ nsIFrame* aChildFrame)
+{
+ aOverflowAreas.UnionWith(aChildFrame->GetOverflowAreas() +
+ aChildFrame->GetPosition());
+}
+
+/**
+ * This function takes a frame that is part of a block-in-inline split,
+ * and _if_ that frame is an anonymous block created by an ib split it
+ * returns the block's preceding inline. This is needed because the
+ * split inline's style context is the parent of the anonymous block's
+ * style context.
+ *
+ * If aFrame is not an anonymous block, null is returned.
+ */
+static nsIFrame*
+GetIBSplitSiblingForAnonymousBlock(const nsIFrame* aFrame)
+{
+ NS_PRECONDITION(aFrame, "Must have a non-null frame!");
+ NS_ASSERTION(aFrame->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT,
+ "GetIBSplitSibling should only be called on ib-split frames");
+
+ nsIAtom* type = aFrame->StyleContext()->GetPseudo();
+ if (type != nsCSSAnonBoxes::mozAnonymousBlock &&
+ type != nsCSSAnonBoxes::mozAnonymousPositionedBlock) {
+ // it's not an anonymous block
+ return nullptr;
+ }
+
+ // Find the first continuation of the frame. (Ugh. This ends up
+ // being O(N^2) when it is called O(N) times.)
+ aFrame = aFrame->FirstContinuation();
+
+ /*
+ * Now look up the nsGkAtoms::IBSplitPrevSibling
+ * property.
+ */
+ nsIFrame *ibSplitSibling =
+ aFrame->Properties().Get(nsIFrame::IBSplitPrevSibling());
+ NS_ASSERTION(ibSplitSibling, "Broken frame tree?");
+ return ibSplitSibling;
+}
+
+/**
+ * Get the parent, corrected for the mangled frame tree resulting from
+ * having a block within an inline. The result only differs from the
+ * result of |GetParent| when |GetParent| returns an anonymous block
+ * that was created for an element that was 'display: inline' because
+ * that element contained a block.
+ *
+ * Also skip anonymous scrolled-content parents; inherit directly from the
+ * outer scroll frame.
+ */
+static nsIFrame*
+GetCorrectedParent(const nsIFrame* aFrame)
+{
+ nsIFrame* parent = aFrame->GetParent();
+ if (!parent) {
+ return nullptr;
+ }
+
+ // For a table caption we want the _inner_ table frame (unless it's anonymous)
+ // as the style parent.
+ if (aFrame->IsTableCaption()) {
+ nsIFrame* innerTable = parent->PrincipalChildList().FirstChild();
+ if (!innerTable->StyleContext()->GetPseudo()) {
+ return innerTable;
+ }
+ }
+
+ // Table wrappers are always anon boxes; if we're in here for an outer
+ // table, that actually means its the _inner_ table that wants to
+ // know its parent. So get the pseudo of the inner in that case.
+ nsIAtom* pseudo = aFrame->StyleContext()->GetPseudo();
+ if (pseudo == nsCSSAnonBoxes::tableWrapper) {
+ pseudo = aFrame->PrincipalChildList().FirstChild()->StyleContext()->GetPseudo();
+ }
+ return nsFrame::CorrectStyleParentFrame(parent, pseudo);
+}
+
+/* static */
+nsIFrame*
+nsFrame::CorrectStyleParentFrame(nsIFrame* aProspectiveParent,
+ nsIAtom* aChildPseudo)
+{
+ NS_PRECONDITION(aProspectiveParent, "Must have a prospective parent");
+
+ // Anon boxes are parented to their actual parent already, except
+ // for non-elements. Those should not be treated as an anon box.
+ if (aChildPseudo && !nsCSSAnonBoxes::IsNonElement(aChildPseudo) &&
+ nsCSSAnonBoxes::IsAnonBox(aChildPseudo)) {
+ NS_ASSERTION(aChildPseudo != nsCSSAnonBoxes::mozAnonymousBlock &&
+ aChildPseudo != nsCSSAnonBoxes::mozAnonymousPositionedBlock,
+ "Should have dealt with kids that have "
+ "NS_FRAME_PART_OF_IBSPLIT elsewhere");
+ return aProspectiveParent;
+ }
+
+ // Otherwise, walk up out of all anon boxes. For placeholder frames, walk out
+ // of all pseudo-elements as well. Otherwise ReparentStyleContext could cause
+ // style data to be out of sync with the frame tree.
+ nsIFrame* parent = aProspectiveParent;
+ do {
+ if (parent->GetStateBits() & NS_FRAME_PART_OF_IBSPLIT) {
+ nsIFrame* sibling = GetIBSplitSiblingForAnonymousBlock(parent);
+
+ if (sibling) {
+ // |parent| was a block in an {ib} split; use the inline as
+ // |the style parent.
+ parent = sibling;
+ }
+ }
+
+ nsIAtom* parentPseudo = parent->StyleContext()->GetPseudo();
+ if (!parentPseudo ||
+ (!nsCSSAnonBoxes::IsAnonBox(parentPseudo) &&
+ // nsPlaceholderFrame pases in nsGkAtoms::placeholderFrame for
+ // aChildPseudo (even though that's not a valid pseudo-type) just to
+ // trigger this behavior of walking up to the nearest non-pseudo
+ // ancestor.
+ aChildPseudo != nsGkAtoms::placeholderFrame)) {
+ return parent;
+ }
+
+ parent = parent->GetParent();
+ } while (parent);
+
+ if (aProspectiveParent->StyleContext()->GetPseudo() ==
+ nsCSSAnonBoxes::viewportScroll) {
+ // aProspectiveParent is the scrollframe for a viewport
+ // and the kids are the anonymous scrollbars
+ return aProspectiveParent;
+ }
+
+ // We can get here if the root element is absolutely positioned.
+ // We can't test for this very accurately, but it can only happen
+ // when the prospective parent is a canvas frame.
+ NS_ASSERTION(aProspectiveParent->GetType() == nsGkAtoms::canvasFrame,
+ "Should have found a parent before this");
+ return nullptr;
+}
+
+nsStyleContext*
+nsFrame::DoGetParentStyleContext(nsIFrame** aProviderFrame) const
+{
+ *aProviderFrame = nullptr;
+ nsFrameManager* fm = PresContext()->FrameManager();
+ if (MOZ_LIKELY(mContent)) {
+ nsIContent* parentContent = mContent->GetFlattenedTreeParent();
+ if (MOZ_LIKELY(parentContent)) {
+ nsIAtom* pseudo = StyleContext()->GetPseudo();
+ if (!pseudo || !mContent->IsElement() ||
+ (!nsCSSAnonBoxes::IsAnonBox(pseudo) &&
+ // Ensure that we don't return the display:contents style
+ // of the parent content for pseudos that have the same content
+ // as their primary frame (like -moz-list-bullets do):
+ mContent->GetPrimaryFrame() == this) ||
+ /* if next is true then it's really a request for the table frame's
+ parent context, see nsTable[Outer]Frame::GetParentStyleContext. */
+ pseudo == nsCSSAnonBoxes::tableWrapper) {
+ nsStyleContext* sc = fm->GetDisplayContentsStyleFor(parentContent);
+ if (MOZ_UNLIKELY(sc)) {
+ return sc;
+ }
+ }
+ } else {
+ if (!StyleContext()->GetPseudo()) {
+ // we're a frame for the root. We have no style context parent.
+ return nullptr;
+ }
+ }
+ }
+
+ if (!(mState & NS_FRAME_OUT_OF_FLOW)) {
+ /*
+ * If this frame is an anonymous block created when an inline with a block
+ * inside it got split, then the parent style context is on its preceding
+ * inline. We can get to it using GetIBSplitSiblingForAnonymousBlock.
+ */
+ if (mState & NS_FRAME_PART_OF_IBSPLIT) {
+ nsIFrame* ibSplitSibling = GetIBSplitSiblingForAnonymousBlock(this);
+ if (ibSplitSibling) {
+ return (*aProviderFrame = ibSplitSibling)->StyleContext();
+ }
+ }
+
+ // If this frame is one of the blocks that split an inline, we must
+ // return the "special" inline parent, i.e., the parent that this
+ // frame would have if we didn't mangle the frame structure.
+ *aProviderFrame = GetCorrectedParent(this);
+ return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
+ }
+
+ // We're an out-of-flow frame. For out-of-flow frames, we must
+ // resolve underneath the placeholder's parent. The placeholder is
+ // reached from the first-in-flow.
+ nsIFrame* placeholder = fm->GetPlaceholderFrameFor(FirstInFlow());
+ if (!placeholder) {
+ NS_NOTREACHED("no placeholder frame for out-of-flow frame");
+ *aProviderFrame = GetCorrectedParent(this);
+ return *aProviderFrame ? (*aProviderFrame)->StyleContext() : nullptr;
+ }
+ return placeholder->GetParentStyleContext(aProviderFrame);
+}
+
+void
+nsFrame::GetLastLeaf(nsPresContext* aPresContext, nsIFrame **aFrame)
+{
+ if (!aFrame || !*aFrame)
+ return;
+ nsIFrame *child = *aFrame;
+ //if we are a block frame then go for the last line of 'this'
+ while (1){
+ child = child->PrincipalChildList().FirstChild();
+ if (!child)
+ return;//nothing to do
+ nsIFrame* siblingFrame;
+ nsIContent* content;
+ //ignore anonymous elements, e.g. mozTableAdd* mozTableRemove*
+ //see bug 278197 comment #12 #13 for details
+ while ((siblingFrame = child->GetNextSibling()) &&
+ (content = siblingFrame->GetContent()) &&
+ !content->IsRootOfNativeAnonymousSubtree())
+ child = siblingFrame;
+ *aFrame = child;
+ }
+}
+
+void
+nsFrame::GetFirstLeaf(nsPresContext* aPresContext, nsIFrame **aFrame)
+{
+ if (!aFrame || !*aFrame)
+ return;
+ nsIFrame *child = *aFrame;
+ while (1){
+ child = child->PrincipalChildList().FirstChild();
+ if (!child)
+ return;//nothing to do
+ *aFrame = child;
+ }
+}
+
+/* virtual */ bool
+nsIFrame::IsFocusable(int32_t *aTabIndex, bool aWithMouse)
+{
+ int32_t tabIndex = -1;
+ if (aTabIndex) {
+ *aTabIndex = -1; // Default for early return is not focusable
+ }
+ bool isFocusable = false;
+
+ if (mContent && mContent->IsElement() && IsVisibleConsideringAncestors() &&
+ StyleContext()->GetPseudo() != nsCSSAnonBoxes::anonymousFlexItem &&
+ StyleContext()->GetPseudo() != nsCSSAnonBoxes::anonymousGridItem) {
+ const nsStyleUserInterface* ui = StyleUserInterface();
+ if (ui->mUserFocus != StyleUserFocus::Ignore &&
+ ui->mUserFocus != StyleUserFocus::None) {
+ // Pass in default tabindex of -1 for nonfocusable and 0 for focusable
+ tabIndex = 0;
+ }
+ isFocusable = mContent->IsFocusable(&tabIndex, aWithMouse);
+ if (!isFocusable && !aWithMouse &&
+ GetType() == nsGkAtoms::scrollFrame &&
+ mContent->IsHTMLElement() &&
+ !mContent->IsRootOfNativeAnonymousSubtree() &&
+ mContent->GetParent() &&
+ !mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
+ // Elements with scrollable view are focusable with script & tabbable
+ // Otherwise you couldn't scroll them with keyboard, which is
+ // an accessibility issue (e.g. Section 508 rules)
+ // However, we don't make them to be focusable with the mouse,
+ // because the extra focus outlines are considered unnecessarily ugly.
+ // When clicked on, the selection position within the element
+ // will be enough to make them keyboard scrollable.
+ nsIScrollableFrame *scrollFrame = do_QueryFrame(this);
+ if (scrollFrame &&
+ !scrollFrame->GetScrollbarStyles().IsHiddenInBothDirections() &&
+ !scrollFrame->GetScrollRange().IsEqualEdges(nsRect(0, 0, 0, 0))) {
+ // Scroll bars will be used for overflow
+ isFocusable = true;
+ tabIndex = 0;
+ }
+ }
+ }
+
+ if (aTabIndex) {
+ *aTabIndex = tabIndex;
+ }
+ return isFocusable;
+}
+
+/**
+ * @return true if this text frame ends with a newline character which is
+ * treated as preformatted. It should return false if this is not a text frame.
+ */
+bool
+nsIFrame::HasSignificantTerminalNewline() const
+{
+ return false;
+}
+
+static uint8_t
+ConvertSVGDominantBaselineToVerticalAlign(uint8_t aDominantBaseline)
+{
+ // Most of these are approximate mappings.
+ switch (aDominantBaseline) {
+ case NS_STYLE_DOMINANT_BASELINE_HANGING:
+ case NS_STYLE_DOMINANT_BASELINE_TEXT_BEFORE_EDGE:
+ return NS_STYLE_VERTICAL_ALIGN_TEXT_TOP;
+ case NS_STYLE_DOMINANT_BASELINE_TEXT_AFTER_EDGE:
+ case NS_STYLE_DOMINANT_BASELINE_IDEOGRAPHIC:
+ return NS_STYLE_VERTICAL_ALIGN_TEXT_BOTTOM;
+ case NS_STYLE_DOMINANT_BASELINE_CENTRAL:
+ case NS_STYLE_DOMINANT_BASELINE_MIDDLE:
+ case NS_STYLE_DOMINANT_BASELINE_MATHEMATICAL:
+ return NS_STYLE_VERTICAL_ALIGN_MIDDLE;
+ case NS_STYLE_DOMINANT_BASELINE_AUTO:
+ case NS_STYLE_DOMINANT_BASELINE_ALPHABETIC:
+ return NS_STYLE_VERTICAL_ALIGN_BASELINE;
+ case NS_STYLE_DOMINANT_BASELINE_USE_SCRIPT:
+ case NS_STYLE_DOMINANT_BASELINE_NO_CHANGE:
+ case NS_STYLE_DOMINANT_BASELINE_RESET_SIZE:
+ // These three should not simply map to 'baseline', but we don't
+ // support the complex baseline model that SVG 1.1 has and which
+ // css3-linebox now defines.
+ return NS_STYLE_VERTICAL_ALIGN_BASELINE;
+ default:
+ NS_NOTREACHED("unexpected aDominantBaseline value");
+ return NS_STYLE_VERTICAL_ALIGN_BASELINE;
+ }
+}
+
+uint8_t
+nsIFrame::VerticalAlignEnum() const
+{
+ if (IsSVGText()) {
+ uint8_t dominantBaseline;
+ for (const nsIFrame* frame = this; frame; frame = frame->GetParent()) {
+ dominantBaseline = frame->StyleSVGReset()->mDominantBaseline;
+ if (dominantBaseline != NS_STYLE_DOMINANT_BASELINE_AUTO ||
+ frame->GetType() == nsGkAtoms::svgTextFrame) {
+ break;
+ }
+ }
+ return ConvertSVGDominantBaselineToVerticalAlign(dominantBaseline);
+ }
+
+ const nsStyleCoord& verticalAlign = StyleDisplay()->mVerticalAlign;
+ if (verticalAlign.GetUnit() == eStyleUnit_Enumerated) {
+ return verticalAlign.GetIntValue();
+ }
+
+ return eInvalidVerticalAlign;
+}
+
+/* static */
+void nsFrame::FillCursorInformationFromStyle(const nsStyleUserInterface* ui,
+ nsIFrame::Cursor& aCursor)
+{
+ aCursor.mCursor = ui->mCursor;
+ aCursor.mHaveHotspot = false;
+ aCursor.mLoading = false;
+ aCursor.mHotspotX = aCursor.mHotspotY = 0.0f;
+
+ for (const nsCursorImage& item : ui->mCursorImages) {
+ uint32_t status;
+ nsresult rv = item.GetImage()->GetImageStatus(&status);
+ if (NS_SUCCEEDED(rv)) {
+ if (!(status & imgIRequest::STATUS_LOAD_COMPLETE)) {
+ // If we are falling back because any cursor before is loading,
+ // let the consumer know.
+ aCursor.mLoading = true;
+ } else if (!(status & imgIRequest::STATUS_ERROR)) {
+ // This is the one we want
+ item.GetImage()->GetImage(getter_AddRefs(aCursor.mContainer));
+ aCursor.mHaveHotspot = item.mHaveHotspot;
+ aCursor.mHotspotX = item.mHotspotX;
+ aCursor.mHotspotY = item.mHotspotY;
+ break;
+ }
+ }
+ }
+}
+
+NS_IMETHODIMP
+nsFrame::RefreshSizeCache(nsBoxLayoutState& aState)
+{
+ // XXXbz this comment needs some rewriting to make sense in the
+ // post-reflow-branch world.
+
+ // Ok we need to compute our minimum, preferred, and maximum sizes.
+ // 1) Maximum size. This is easy. Its infinite unless it is overloaded by CSS.
+ // 2) Preferred size. This is a little harder. This is the size the block would be
+ // if it were laid out on an infinite canvas. So we can get this by reflowing
+ // the block with and INTRINSIC width and height. We can also do a nice optimization
+ // for incremental reflow. If the reflow is incremental then we can pass a flag to
+ // have the block compute the preferred width for us! Preferred height can just be
+ // the minimum height;
+ // 3) Minimum size. This is a toughy. We can pass the block a flag asking for the max element
+ // size. That would give us the width. Unfortunately you can only ask for a maxElementSize
+ // during an incremental reflow. So on other reflows we will just have to use 0.
+ // The min height on the other hand is fairly easy we need to get the largest
+ // line height. This can be done with the line iterator.
+
+ // if we do have a rendering context
+ nsRenderingContext* rendContext = aState.GetRenderingContext();
+ if (rendContext) {
+ nsPresContext* presContext = aState.PresContext();
+
+ // If we don't have any HTML constraints and it's a resize, then nothing in the block
+ // could have changed, so no refresh is necessary.
+ nsBoxLayoutMetrics* metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mBlockPrefSize))
+ return NS_OK;
+
+ // the rect we plan to size to.
+ nsRect rect = GetRect();
+
+ nsMargin bp(0,0,0,0);
+ GetXULBorderAndPadding(bp);
+
+ {
+ // If we're a container for font size inflation, then shrink
+ // wrapping inside of us should not apply font size inflation.
+ AutoMaybeDisableFontInflation an(this);
+
+ metrics->mBlockPrefSize.width =
+ GetPrefISize(rendContext) + bp.LeftRight();
+ metrics->mBlockMinSize.width =
+ GetMinISize(rendContext) + bp.LeftRight();
+ }
+
+ // do the nasty.
+ const WritingMode wm = aState.OuterReflowInput() ?
+ aState.OuterReflowInput()->GetWritingMode() : GetWritingMode();
+ ReflowOutput desiredSize(wm);
+ BoxReflow(aState, presContext, desiredSize, rendContext,
+ rect.x, rect.y,
+ metrics->mBlockPrefSize.width, NS_UNCONSTRAINEDSIZE);
+
+ metrics->mBlockMinSize.height = 0;
+ // ok we need the max ascent of the items on the line. So to do this
+ // ask the block for its line iterator. Get the max ascent.
+ nsAutoLineIterator lines = GetLineIterator();
+ if (lines)
+ {
+ metrics->mBlockMinSize.height = 0;
+ int count = 0;
+ nsIFrame* firstFrame = nullptr;
+ int32_t framesOnLine;
+ nsRect lineBounds;
+
+ do {
+ lines->GetLine(count, &firstFrame, &framesOnLine, lineBounds);
+
+ if (lineBounds.height > metrics->mBlockMinSize.height)
+ metrics->mBlockMinSize.height = lineBounds.height;
+
+ count++;
+ } while(firstFrame);
+ } else {
+ metrics->mBlockMinSize.height = desiredSize.Height();
+ }
+
+ metrics->mBlockPrefSize.height = metrics->mBlockMinSize.height;
+
+ if (desiredSize.BlockStartAscent() ==
+ ReflowOutput::ASK_FOR_BASELINE) {
+ if (!nsLayoutUtils::GetFirstLineBaseline(wm, this,
+ &metrics->mBlockAscent))
+ metrics->mBlockAscent = GetLogicalBaseline(wm);
+ } else {
+ metrics->mBlockAscent = desiredSize.BlockStartAscent();
+ }
+
+#ifdef DEBUG_adaptor
+ printf("min=(%d,%d), pref=(%d,%d), ascent=%d\n", metrics->mBlockMinSize.width,
+ metrics->mBlockMinSize.height,
+ metrics->mBlockPrefSize.width,
+ metrics->mBlockPrefSize.height,
+ metrics->mBlockAscent);
+#endif
+ }
+
+ return NS_OK;
+}
+
+/* virtual */ nsILineIterator*
+nsFrame::GetLineIterator()
+{
+ return nullptr;
+}
+
+nsSize
+nsFrame::GetXULPrefSize(nsBoxLayoutState& aState)
+{
+ nsSize size(0,0);
+ DISPLAY_PREF_SIZE(this, size);
+ // If the size is cached, and there are no HTML constraints that we might
+ // be depending on, then we just return the cached size.
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mPrefSize)) {
+ return metrics->mPrefSize;
+ }
+
+ if (IsXULCollapsed())
+ return size;
+
+ // get our size in CSS.
+ bool widthSet, heightSet;
+ bool completelyRedefined = nsIFrame::AddXULPrefSize(this, size, widthSet, heightSet);
+
+ // Refresh our caches with new sizes.
+ if (!completelyRedefined) {
+ RefreshSizeCache(aState);
+ nsSize blockSize = metrics->mBlockPrefSize;
+
+ // notice we don't need to add our borders or padding
+ // in. That's because the block did it for us.
+ if (!widthSet)
+ size.width = blockSize.width;
+ if (!heightSet)
+ size.height = blockSize.height;
+ }
+
+ metrics->mPrefSize = size;
+ return size;
+}
+
+nsSize
+nsFrame::GetXULMinSize(nsBoxLayoutState& aState)
+{
+ nsSize size(0,0);
+ DISPLAY_MIN_SIZE(this, size);
+ // Don't use the cache if we have HTMLReflowInput constraints --- they might have changed
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mMinSize)) {
+ size = metrics->mMinSize;
+ return size;
+ }
+
+ if (IsXULCollapsed())
+ return size;
+
+ // get our size in CSS.
+ bool widthSet, heightSet;
+ bool completelyRedefined =
+ nsIFrame::AddXULMinSize(aState, this, size, widthSet, heightSet);
+
+ // Refresh our caches with new sizes.
+ if (!completelyRedefined) {
+ RefreshSizeCache(aState);
+ nsSize blockSize = metrics->mBlockMinSize;
+
+ if (!widthSet)
+ size.width = blockSize.width;
+ if (!heightSet)
+ size.height = blockSize.height;
+ }
+
+ metrics->mMinSize = size;
+ return size;
+}
+
+nsSize
+nsFrame::GetXULMaxSize(nsBoxLayoutState& aState)
+{
+ nsSize size(NS_INTRINSICSIZE, NS_INTRINSICSIZE);
+ DISPLAY_MAX_SIZE(this, size);
+ // Don't use the cache if we have HTMLReflowInput constraints --- they might have changed
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mMaxSize)) {
+ size = metrics->mMaxSize;
+ return size;
+ }
+
+ if (IsXULCollapsed())
+ return size;
+
+ size = nsBox::GetXULMaxSize(aState);
+ metrics->mMaxSize = size;
+
+ return size;
+}
+
+nscoord
+nsFrame::GetXULFlex()
+{
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mFlex))
+ return metrics->mFlex;
+
+ metrics->mFlex = nsBox::GetXULFlex();
+
+ return metrics->mFlex;
+}
+
+nscoord
+nsFrame::GetXULBoxAscent(nsBoxLayoutState& aState)
+{
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ if (!DoesNeedRecalc(metrics->mAscent))
+ return metrics->mAscent;
+
+ if (IsXULCollapsed()) {
+ metrics->mAscent = 0;
+ } else {
+ // Refresh our caches with new sizes.
+ RefreshSizeCache(aState);
+ metrics->mAscent = metrics->mBlockAscent;
+ }
+
+ return metrics->mAscent;
+}
+
+nsresult
+nsFrame::DoXULLayout(nsBoxLayoutState& aState)
+{
+ nsRect ourRect(mRect);
+
+ nsRenderingContext* rendContext = aState.GetRenderingContext();
+ nsPresContext* presContext = aState.PresContext();
+ WritingMode ourWM = GetWritingMode();
+ const WritingMode outerWM = aState.OuterReflowInput() ?
+ aState.OuterReflowInput()->GetWritingMode() : ourWM;
+ ReflowOutput desiredSize(outerWM);
+ LogicalSize ourSize = GetLogicalSize(outerWM);
+
+ if (rendContext) {
+
+ BoxReflow(aState, presContext, desiredSize, rendContext,
+ ourRect.x, ourRect.y, ourRect.width, ourRect.height);
+
+ if (IsXULCollapsed()) {
+ SetSize(nsSize(0, 0));
+ } else {
+
+ // if our child needs to be bigger. This might happend with
+ // wrapping text. There is no way to predict its height until we
+ // reflow it. Now that we know the height reshuffle upward.
+ if (desiredSize.ISize(outerWM) > ourSize.ISize(outerWM) ||
+ desiredSize.BSize(outerWM) > ourSize.BSize(outerWM)) {
+
+#ifdef DEBUG_GROW
+ XULDumpBox(stdout);
+ printf(" GREW from (%d,%d) -> (%d,%d)\n",
+ ourSize.ISize(outerWM), ourSize.BSize(outerWM),
+ desiredSize.ISize(outerWM), desiredSize.BSize(outerWM));
+#endif
+
+ if (desiredSize.ISize(outerWM) > ourSize.ISize(outerWM)) {
+ ourSize.ISize(outerWM) = desiredSize.ISize(outerWM);
+ }
+
+ if (desiredSize.BSize(outerWM) > ourSize.BSize(outerWM)) {
+ ourSize.BSize(outerWM) = desiredSize.BSize(outerWM);
+ }
+ }
+
+ // ensure our size is what we think is should be. Someone could have
+ // reset the frame to be smaller or something dumb like that.
+ SetSize(ourSize.ConvertTo(ourWM, outerWM));
+ }
+ }
+
+ // Should we do this if IsXULCollapsed() is true?
+ LogicalSize size(GetLogicalSize(outerWM));
+ desiredSize.ISize(outerWM) = size.ISize(outerWM);
+ desiredSize.BSize(outerWM) = size.BSize(outerWM);
+ desiredSize.UnionOverflowAreasWithDesiredBounds();
+
+ if (HasAbsolutelyPositionedChildren()) {
+ // Set up a |reflowInput| to pass into ReflowAbsoluteFrames
+ ReflowInput reflowInput(aState.PresContext(), this,
+ aState.GetRenderingContext(),
+ LogicalSize(ourWM, ISize(),
+ NS_UNCONSTRAINEDSIZE),
+ ReflowInput::DUMMY_PARENT_REFLOW_STATE);
+
+ AddStateBits(NS_FRAME_IN_REFLOW);
+ // Set up a |reflowStatus| to pass into ReflowAbsoluteFrames
+ // (just a dummy value; hopefully that's OK)
+ nsReflowStatus reflowStatus = NS_FRAME_COMPLETE;
+ ReflowAbsoluteFrames(aState.PresContext(), desiredSize,
+ reflowInput, reflowStatus);
+ RemoveStateBits(NS_FRAME_IN_REFLOW);
+ }
+
+ nsSize oldSize(ourRect.Size());
+ FinishAndStoreOverflow(desiredSize.mOverflowAreas,
+ size.GetPhysicalSize(outerWM), &oldSize);
+
+ SyncLayout(aState);
+
+ return NS_OK;
+}
+
+void
+nsFrame::BoxReflow(nsBoxLayoutState& aState,
+ nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ nsRenderingContext* aRenderingContext,
+ nscoord aX,
+ nscoord aY,
+ nscoord aWidth,
+ nscoord aHeight,
+ bool aMoveFrame)
+{
+ DO_GLOBAL_REFLOW_COUNT("nsBoxToBlockAdaptor");
+
+#ifdef DEBUG_REFLOW
+ nsAdaptorAddIndents();
+ printf("Reflowing: ");
+ nsFrame::ListTag(stdout, mFrame);
+ printf("\n");
+ gIndent2++;
+#endif
+
+ nsBoxLayoutMetrics *metrics = BoxMetrics();
+ nsReflowStatus status = NS_FRAME_COMPLETE;
+ WritingMode wm = aDesiredSize.GetWritingMode();
+
+ bool needsReflow = NS_SUBTREE_DIRTY(this);
+
+ // if we don't need a reflow then
+ // lets see if we are already that size. Yes? then don't even reflow. We are done.
+ if (!needsReflow) {
+
+ if (aWidth != NS_INTRINSICSIZE && aHeight != NS_INTRINSICSIZE) {
+
+ // if the new calculated size has a 0 width or a 0 height
+ if ((metrics->mLastSize.width == 0 || metrics->mLastSize.height == 0) && (aWidth == 0 || aHeight == 0)) {
+ needsReflow = false;
+ aDesiredSize.Width() = aWidth;
+ aDesiredSize.Height() = aHeight;
+ SetSize(aDesiredSize.Size(wm).ConvertTo(GetWritingMode(), wm));
+ } else {
+ aDesiredSize.Width() = metrics->mLastSize.width;
+ aDesiredSize.Height() = metrics->mLastSize.height;
+
+ // remove the margin. The rect of our child does not include it but our calculated size does.
+ // don't reflow if we are already the right size
+ if (metrics->mLastSize.width == aWidth && metrics->mLastSize.height == aHeight)
+ needsReflow = false;
+ else
+ needsReflow = true;
+
+ }
+ } else {
+ // if the width or height are intrinsic alway reflow because
+ // we don't know what it should be.
+ needsReflow = true;
+ }
+ }
+
+ // ok now reflow the child into the spacers calculated space
+ if (needsReflow) {
+
+ aDesiredSize.ClearSize();
+
+ // create a reflow state to tell our child to flow at the given size.
+
+ // Construct a bogus parent reflow state so that there's a usable
+ // containing block reflow state.
+ nsMargin margin(0,0,0,0);
+ GetXULMargin(margin);
+
+ nsSize parentSize(aWidth, aHeight);
+ if (parentSize.height != NS_INTRINSICSIZE)
+ parentSize.height += margin.TopBottom();
+ if (parentSize.width != NS_INTRINSICSIZE)
+ parentSize.width += margin.LeftRight();
+
+ nsIFrame *parentFrame = GetParent();
+ nsFrameState savedState = parentFrame->GetStateBits();
+ WritingMode parentWM = parentFrame->GetWritingMode();
+ ReflowInput
+ parentReflowInput(aPresContext, parentFrame, aRenderingContext,
+ LogicalSize(parentWM, parentSize),
+ ReflowInput::DUMMY_PARENT_REFLOW_STATE);
+ parentFrame->RemoveStateBits(~nsFrameState(0));
+ parentFrame->AddStateBits(savedState);
+
+ // This may not do very much useful, but it's probably worth trying.
+ if (parentSize.width != NS_INTRINSICSIZE)
+ parentReflowInput.SetComputedWidth(std::max(parentSize.width, 0));
+ if (parentSize.height != NS_INTRINSICSIZE)
+ parentReflowInput.SetComputedHeight(std::max(parentSize.height, 0));
+ parentReflowInput.ComputedPhysicalMargin().SizeTo(0, 0, 0, 0);
+ // XXX use box methods
+ parentFrame->GetXULPadding(parentReflowInput.ComputedPhysicalPadding());
+ parentFrame->GetXULBorder(parentReflowInput.ComputedPhysicalBorderPadding());
+ parentReflowInput.ComputedPhysicalBorderPadding() +=
+ parentReflowInput.ComputedPhysicalPadding();
+
+ // Construct the parent chain manually since constructing it normally
+ // messes up dimensions.
+ const ReflowInput *outerReflowInput = aState.OuterReflowInput();
+ NS_ASSERTION(!outerReflowInput || outerReflowInput->mFrame != this,
+ "in and out of XUL on a single frame?");
+ const ReflowInput* parentRI;
+ if (outerReflowInput && outerReflowInput->mFrame == parentFrame) {
+ // We're a frame (such as a text control frame) that jumps into
+ // box reflow and then straight out of it on the child frame.
+ // This means we actually have a real parent reflow state.
+ // nsLayoutUtils::InflationMinFontSizeFor used to need this to be
+ // linked up correctly for text control frames, so do so here).
+ parentRI = outerReflowInput;
+ } else {
+ parentRI = &parentReflowInput;
+ }
+
+ // XXX Is it OK that this reflow state has only one ancestor?
+ // (It used to have a bogus parent, skipping all the boxes).
+ WritingMode wm = GetWritingMode();
+ LogicalSize logicalSize(wm, nsSize(aWidth, aHeight));
+ logicalSize.BSize(wm) = NS_INTRINSICSIZE;
+ ReflowInput reflowInput(aPresContext, *parentRI, this,
+ logicalSize, nullptr,
+ ReflowInput::DUMMY_PARENT_REFLOW_STATE);
+
+ // XXX_jwir3: This is somewhat fishy. If this is actually changing the value
+ // here (which it might be), then we should make sure that it's
+ // correct the first time around, rather than changing it later.
+ reflowInput.mCBReflowInput = parentRI;
+
+ reflowInput.mReflowDepth = aState.GetReflowDepth();
+
+ // mComputedWidth and mComputedHeight are content-box, not
+ // border-box
+ if (aWidth != NS_INTRINSICSIZE) {
+ nscoord computedWidth =
+ aWidth - reflowInput.ComputedPhysicalBorderPadding().LeftRight();
+ computedWidth = std::max(computedWidth, 0);
+ reflowInput.SetComputedWidth(computedWidth);
+ }
+
+ // Most child frames of box frames (e.g. subdocument or scroll frames)
+ // need to be constrained to the provided size and overflow as necessary.
+ // The one exception are block frames, because we need to know their
+ // natural height excluding any overflow area which may be caused by
+ // various CSS effects such as shadow or outline.
+ if (!IsFrameOfType(eBlockFrame)) {
+ if (aHeight != NS_INTRINSICSIZE) {
+ nscoord computedHeight =
+ aHeight - reflowInput.ComputedPhysicalBorderPadding().TopBottom();
+ computedHeight = std::max(computedHeight, 0);
+ reflowInput.SetComputedHeight(computedHeight);
+ } else {
+ reflowInput.SetComputedHeight(
+ ComputeSize(aRenderingContext, wm,
+ logicalSize,
+ logicalSize.ISize(wm),
+ reflowInput.ComputedLogicalMargin().Size(wm),
+ reflowInput.ComputedLogicalBorderPadding().Size(wm) -
+ reflowInput.ComputedLogicalPadding().Size(wm),
+ reflowInput.ComputedLogicalPadding().Size(wm),
+ ComputeSizeFlags::eDefault).Height(wm));
+ }
+ }
+
+ // Box layout calls SetRect before XULLayout, whereas non-box layout
+ // calls SetRect after Reflow.
+ // XXX Perhaps we should be doing this by twiddling the rect back to
+ // mLastSize before calling Reflow and then switching it back, but
+ // However, mLastSize can also be the size passed to BoxReflow by
+ // RefreshSizeCache, so that doesn't really make sense.
+ if (metrics->mLastSize.width != aWidth) {
+ reflowInput.SetHResize(true);
+
+ // When font size inflation is enabled, a horizontal resize
+ // requires a full reflow. See ReflowInput::InitResizeFlags
+ // for more details.
+ if (nsLayoutUtils::FontSizeInflationEnabled(aPresContext)) {
+ AddStateBits(NS_FRAME_IS_DIRTY);
+ }
+ }
+ if (metrics->mLastSize.height != aHeight) {
+ reflowInput.SetVResize(true);
+ }
+
+ #ifdef DEBUG_REFLOW
+ nsAdaptorAddIndents();
+ printf("Size=(%d,%d)\n",reflowInput.ComputedWidth(),
+ reflowInput.ComputedHeight());
+ nsAdaptorAddIndents();
+ nsAdaptorPrintReason(reflowInput);
+ printf("\n");
+ #endif
+
+ // place the child and reflow
+
+ Reflow(aPresContext, aDesiredSize, reflowInput, status);
+
+ NS_ASSERTION(NS_FRAME_IS_COMPLETE(status), "bad status");
+
+ uint32_t layoutFlags = aState.LayoutFlags();
+ nsContainerFrame::FinishReflowChild(this, aPresContext, aDesiredSize,
+ &reflowInput, aX, aY, layoutFlags | NS_FRAME_NO_MOVE_FRAME);
+
+ // Save the ascent. (bug 103925)
+ if (IsXULCollapsed()) {
+ metrics->mAscent = 0;
+ } else {
+ if (aDesiredSize.BlockStartAscent() ==
+ ReflowOutput::ASK_FOR_BASELINE) {
+ if (!nsLayoutUtils::GetFirstLineBaseline(wm, this, &metrics->mAscent))
+ metrics->mAscent = GetLogicalBaseline(wm);
+ } else
+ metrics->mAscent = aDesiredSize.BlockStartAscent();
+ }
+
+ } else {
+ aDesiredSize.SetBlockStartAscent(metrics->mBlockAscent);
+ }
+
+#ifdef DEBUG_REFLOW
+ if (aHeight != NS_INTRINSICSIZE && aDesiredSize.Height() != aHeight)
+ {
+ nsAdaptorAddIndents();
+ printf("*****got taller!*****\n");
+
+ }
+ if (aWidth != NS_INTRINSICSIZE && aDesiredSize.Width() != aWidth)
+ {
+ nsAdaptorAddIndents();
+ printf("*****got wider!******\n");
+
+ }
+#endif
+
+ if (aWidth == NS_INTRINSICSIZE)
+ aWidth = aDesiredSize.Width();
+
+ if (aHeight == NS_INTRINSICSIZE)
+ aHeight = aDesiredSize.Height();
+
+ metrics->mLastSize.width = aDesiredSize.Width();
+ metrics->mLastSize.height = aDesiredSize.Height();
+
+#ifdef DEBUG_REFLOW
+ gIndent2--;
+#endif
+}
+
+nsBoxLayoutMetrics*
+nsFrame::BoxMetrics() const
+{
+ nsBoxLayoutMetrics* metrics = Properties().Get(BoxMetricsProperty());
+ NS_ASSERTION(metrics, "A box layout method was called but InitBoxMetrics was never called");
+ return metrics;
+}
+
+/* static */ void
+nsIFrame::AddInPopupStateBitToDescendants(nsIFrame* aFrame)
+{
+ if (!aFrame->HasAnyStateBits(NS_FRAME_IN_POPUP) &&
+ aFrame->TrackingVisibility()) {
+ // Assume all frames in popups are visible.
+ aFrame->IncApproximateVisibleCount();
+ }
+
+ aFrame->AddStateBits(NS_FRAME_IN_POPUP);
+
+ AutoTArray<nsIFrame::ChildList,4> childListArray;
+ aFrame->GetCrossDocChildLists(&childListArray);
+
+ nsIFrame::ChildListArrayIterator lists(childListArray);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ AddInPopupStateBitToDescendants(childFrames.get());
+ }
+ }
+}
+
+/* static */ void
+nsIFrame::RemoveInPopupStateBitFromDescendants(nsIFrame* aFrame)
+{
+ if (!aFrame->HasAnyStateBits(NS_FRAME_IN_POPUP) ||
+ nsLayoutUtils::IsPopup(aFrame)) {
+ return;
+ }
+
+ aFrame->RemoveStateBits(NS_FRAME_IN_POPUP);
+
+ if (aFrame->TrackingVisibility()) {
+ // We assume all frames in popups are visible, so this decrement balances
+ // out the increment in AddInPopupStateBitToDescendants above.
+ aFrame->DecApproximateVisibleCount();
+ }
+
+ AutoTArray<nsIFrame::ChildList,4> childListArray;
+ aFrame->GetCrossDocChildLists(&childListArray);
+
+ nsIFrame::ChildListArrayIterator lists(childListArray);
+ for (; !lists.IsDone(); lists.Next()) {
+ nsFrameList::Enumerator childFrames(lists.CurrentList());
+ for (; !childFrames.AtEnd(); childFrames.Next()) {
+ RemoveInPopupStateBitFromDescendants(childFrames.get());
+ }
+ }
+}
+
+void
+nsIFrame::SetParent(nsContainerFrame* aParent)
+{
+ // Note that the current mParent may already be destroyed at this point.
+ mParent = aParent;
+ if (::IsXULBoxWrapped(this)) {
+ ::InitBoxMetrics(this, true);
+ } else {
+ // We could call Properties().Delete(BoxMetricsProperty()); here but
+ // that's kind of slow and re-parenting in such a way that we were
+ // IsXULBoxWrapped() before but not now should be very rare, so we'll just
+ // keep this unused frame property until this frame dies instead.
+ }
+
+ if (GetStateBits() & (NS_FRAME_HAS_VIEW | NS_FRAME_HAS_CHILD_WITH_VIEW)) {
+ for (nsIFrame* f = aParent;
+ f && !(f->GetStateBits() & NS_FRAME_HAS_CHILD_WITH_VIEW);
+ f = f->GetParent()) {
+ f->AddStateBits(NS_FRAME_HAS_CHILD_WITH_VIEW);
+ }
+ }
+
+ if (HasAnyStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE)) {
+ for (nsIFrame* f = aParent; f; f = f->GetParent()) {
+ if (f->HasAnyStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE)) {
+ break;
+ }
+ f->AddStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE);
+ }
+ }
+
+ if (HasAnyStateBits(NS_FRAME_DESCENDANT_INTRINSIC_ISIZE_DEPENDS_ON_BSIZE)) {
+ for (nsIFrame* f = aParent; f; f = f->GetParent()) {
+ if (f->HasAnyStateBits(NS_FRAME_DESCENDANT_INTRINSIC_ISIZE_DEPENDS_ON_BSIZE)) {
+ break;
+ }
+ f->AddStateBits(NS_FRAME_DESCENDANT_INTRINSIC_ISIZE_DEPENDS_ON_BSIZE);
+ }
+ }
+
+ if (HasInvalidFrameInSubtree()) {
+ for (nsIFrame* f = aParent;
+ f && !f->HasAnyStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT | NS_FRAME_IS_NONDISPLAY);
+ f = nsLayoutUtils::GetCrossDocParentFrame(f)) {
+ f->AddStateBits(NS_FRAME_DESCENDANT_NEEDS_PAINT);
+ }
+ }
+
+ if (aParent->HasAnyStateBits(NS_FRAME_IN_POPUP)) {
+ AddInPopupStateBitToDescendants(this);
+ } else {
+ RemoveInPopupStateBitFromDescendants(this);
+ }
+
+ // If our new parent only has invalid children, then we just invalidate
+ // ourselves too. This is probably faster than clearing the flag all
+ // the way up the frame tree.
+ if (aParent->HasAnyStateBits(NS_FRAME_ALL_DESCENDANTS_NEED_PAINT)) {
+ InvalidateFrame();
+ }
+}
+
+void
+nsIFrame::CreateOwnLayerIfNeeded(nsDisplayListBuilder* aBuilder,
+ nsDisplayList* aList)
+{
+ if (GetContent() &&
+ GetContent()->IsXULElement() &&
+ GetContent()->HasAttr(kNameSpaceID_None, nsGkAtoms::layer)) {
+ aList->AppendNewToTop(new (aBuilder)
+ nsDisplayOwnLayer(aBuilder, this, aList));
+ }
+}
+
+bool
+nsIFrame::IsSelected() const
+{
+ return (GetContent() && GetContent()->IsSelectionDescendant()) ?
+ IsFrameSelected() : false;
+}
+
+/*static*/ void
+nsIFrame::DestroyContentArray(ContentArray* aArray)
+{
+ for (nsIContent* content : *aArray) {
+ content->UnbindFromTree();
+ NS_RELEASE(content);
+ }
+ delete aArray;
+}
+
+bool
+nsIFrame::IsPseudoStackingContextFromStyle() {
+ // If you change this, also change the computation of pseudoStackingContext
+ // in BuildDisplayListForChild()
+ if (StyleEffects()->mOpacity != 1.0f) {
+ return true;
+ }
+ const nsStyleDisplay* disp = StyleDisplay();
+ return disp->IsAbsPosContainingBlock(this) ||
+ disp->IsFloating(this) ||
+ (disp->mWillChangeBitField & NS_STYLE_WILL_CHANGE_STACKING_CONTEXT);
+}
+
+Element*
+nsIFrame::GetPseudoElement(CSSPseudoElementType aType)
+{
+ nsIFrame* frame = nullptr;
+
+ if (aType == CSSPseudoElementType::before) {
+ frame = nsLayoutUtils::GetBeforeFrame(this);
+ } else if (aType == CSSPseudoElementType::after) {
+ frame = nsLayoutUtils::GetAfterFrame(this);
+ }
+
+ if (frame) {
+ nsIContent* content = frame->GetContent();
+ if (content->IsElement()) {
+ return content->AsElement();
+ }
+ }
+
+ return nullptr;
+}
+
+static bool
+IsFrameScrolledOutOfView(nsIFrame *aFrame)
+{
+ nsIScrollableFrame* scrollableFrame =
+ nsLayoutUtils::GetNearestScrollableFrame(aFrame,
+ nsLayoutUtils::SCROLLABLE_SAME_DOC |
+ nsLayoutUtils::SCROLLABLE_INCLUDE_HIDDEN);
+ if (!scrollableFrame) {
+ return false;
+ }
+
+ nsIFrame *scrollableParent = do_QueryFrame(scrollableFrame);
+ nsRect rect = aFrame->GetVisualOverflowRect();
+
+ nsRect transformedRect =
+ nsLayoutUtils::TransformFrameRectToAncestor(aFrame,
+ rect,
+ scrollableParent);
+
+ nsRect scrollableRect = scrollableParent->GetVisualOverflowRect();
+ if (!transformedRect.Intersects(scrollableRect)) {
+ return true;
+ }
+
+ nsIFrame* parent = scrollableParent->GetParent();
+ if (!parent) {
+ return false;
+ }
+
+ return IsFrameScrolledOutOfView(parent);
+}
+
+bool
+nsIFrame::IsScrolledOutOfView()
+{
+ return IsFrameScrolledOutOfView(this);
+}
+
+nsIFrame::CaretPosition::CaretPosition()
+ : mContentOffset(0)
+{
+}
+
+nsIFrame::CaretPosition::~CaretPosition()
+{
+}
+
+bool
+nsFrame::HasCSSAnimations()
+{
+ auto collection =
+ AnimationCollection<CSSAnimation>::GetAnimationCollection(this);
+ return collection && collection->mAnimations.Length() > 0;
+}
+
+bool
+nsFrame::HasCSSTransitions()
+{
+ auto collection =
+ AnimationCollection<CSSTransition>::GetAnimationCollection(this);
+ return collection && collection->mAnimations.Length() > 0;
+}
+
+// Box layout debugging
+#ifdef DEBUG_REFLOW
+int32_t gIndent2 = 0;
+
+void
+nsAdaptorAddIndents()
+{
+ for(int32_t i=0; i < gIndent2; i++)
+ {
+ printf(" ");
+ }
+}
+
+void
+nsAdaptorPrintReason(ReflowInput& aReflowInput)
+{
+ char* reflowReasonString;
+
+ switch(aReflowInput.reason)
+ {
+ case eReflowReason_Initial:
+ reflowReasonString = "initial";
+ break;
+
+ case eReflowReason_Resize:
+ reflowReasonString = "resize";
+ break;
+ case eReflowReason_Dirty:
+ reflowReasonString = "dirty";
+ break;
+ case eReflowReason_StyleChange:
+ reflowReasonString = "stylechange";
+ break;
+ case eReflowReason_Incremental:
+ {
+ switch (aReflowInput.reflowCommand->Type()) {
+ case eReflowType_StyleChanged:
+ reflowReasonString = "incremental (StyleChanged)";
+ break;
+ case eReflowType_ReflowDirty:
+ reflowReasonString = "incremental (ReflowDirty)";
+ break;
+ default:
+ reflowReasonString = "incremental (Unknown)";
+ }
+ }
+ break;
+ default:
+ reflowReasonString = "unknown";
+ break;
+ }
+
+ printf("%s",reflowReasonString);
+}
+
+#endif
+#ifdef DEBUG_LAYOUT
+void
+nsFrame::GetBoxName(nsAutoString& aName)
+{
+ GetFrameName(aName);
+}
+#endif
+
+#ifdef DEBUG
+static void
+GetTagName(nsFrame* aFrame, nsIContent* aContent, int aResultSize,
+ char* aResult)
+{
+ if (aContent) {
+ snprintf(aResult, aResultSize, "%s@%p",
+ nsAtomCString(aContent->NodeInfo()->NameAtom()).get(), aFrame);
+ }
+ else {
+ snprintf(aResult, aResultSize, "@%p", aFrame);
+ }
+}
+
+void
+nsFrame::Trace(const char* aMethod, bool aEnter)
+{
+ if (NS_FRAME_LOG_TEST(sFrameLogModule, NS_FRAME_TRACE_CALLS)) {
+ char tagbuf[40];
+ GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
+ PR_LogPrint("%s: %s %s", tagbuf, aEnter ? "enter" : "exit", aMethod);
+ }
+}
+
+void
+nsFrame::Trace(const char* aMethod, bool aEnter, nsReflowStatus aStatus)
+{
+ if (NS_FRAME_LOG_TEST(sFrameLogModule, NS_FRAME_TRACE_CALLS)) {
+ char tagbuf[40];
+ GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
+ PR_LogPrint("%s: %s %s, status=%scomplete%s",
+ tagbuf, aEnter ? "enter" : "exit", aMethod,
+ NS_FRAME_IS_NOT_COMPLETE(aStatus) ? "not" : "",
+ (NS_FRAME_REFLOW_NEXTINFLOW & aStatus) ? "+reflow" : "");
+ }
+}
+
+void
+nsFrame::TraceMsg(const char* aFormatString, ...)
+{
+ if (NS_FRAME_LOG_TEST(sFrameLogModule, NS_FRAME_TRACE_CALLS)) {
+ // Format arguments into a buffer
+ char argbuf[200];
+ va_list ap;
+ va_start(ap, aFormatString);
+ PR_vsnprintf(argbuf, sizeof(argbuf), aFormatString, ap);
+ va_end(ap);
+
+ char tagbuf[40];
+ GetTagName(this, mContent, sizeof(tagbuf), tagbuf);
+ PR_LogPrint("%s: %s", tagbuf, argbuf);
+ }
+}
+
+void
+nsFrame::VerifyDirtyBitSet(const nsFrameList& aFrameList)
+{
+ for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
+ NS_ASSERTION(e.get()->GetStateBits() & NS_FRAME_IS_DIRTY,
+ "dirty bit not set");
+ }
+}
+
+// Start Display Reflow
+#ifdef DEBUG
+
+DR_cookie::DR_cookie(nsPresContext* aPresContext,
+ nsIFrame* aFrame,
+ const ReflowInput& aReflowInput,
+ ReflowOutput& aMetrics,
+ nsReflowStatus& aStatus)
+ :mPresContext(aPresContext), mFrame(aFrame), mReflowInput(aReflowInput), mMetrics(aMetrics), mStatus(aStatus)
+{
+ MOZ_COUNT_CTOR(DR_cookie);
+ mValue = nsFrame::DisplayReflowEnter(aPresContext, mFrame, mReflowInput);
+}
+
+DR_cookie::~DR_cookie()
+{
+ MOZ_COUNT_DTOR(DR_cookie);
+ nsFrame::DisplayReflowExit(mPresContext, mFrame, mMetrics, mStatus, mValue);
+}
+
+DR_layout_cookie::DR_layout_cookie(nsIFrame* aFrame)
+ : mFrame(aFrame)
+{
+ MOZ_COUNT_CTOR(DR_layout_cookie);
+ mValue = nsFrame::DisplayLayoutEnter(mFrame);
+}
+
+DR_layout_cookie::~DR_layout_cookie()
+{
+ MOZ_COUNT_DTOR(DR_layout_cookie);
+ nsFrame::DisplayLayoutExit(mFrame, mValue);
+}
+
+DR_intrinsic_width_cookie::DR_intrinsic_width_cookie(
+ nsIFrame* aFrame,
+ const char* aType,
+ nscoord& aResult)
+ : mFrame(aFrame)
+ , mType(aType)
+ , mResult(aResult)
+{
+ MOZ_COUNT_CTOR(DR_intrinsic_width_cookie);
+ mValue = nsFrame::DisplayIntrinsicISizeEnter(mFrame, mType);
+}
+
+DR_intrinsic_width_cookie::~DR_intrinsic_width_cookie()
+{
+ MOZ_COUNT_DTOR(DR_intrinsic_width_cookie);
+ nsFrame::DisplayIntrinsicISizeExit(mFrame, mType, mResult, mValue);
+}
+
+DR_intrinsic_size_cookie::DR_intrinsic_size_cookie(
+ nsIFrame* aFrame,
+ const char* aType,
+ nsSize& aResult)
+ : mFrame(aFrame)
+ , mType(aType)
+ , mResult(aResult)
+{
+ MOZ_COUNT_CTOR(DR_intrinsic_size_cookie);
+ mValue = nsFrame::DisplayIntrinsicSizeEnter(mFrame, mType);
+}
+
+DR_intrinsic_size_cookie::~DR_intrinsic_size_cookie()
+{
+ MOZ_COUNT_DTOR(DR_intrinsic_size_cookie);
+ nsFrame::DisplayIntrinsicSizeExit(mFrame, mType, mResult, mValue);
+}
+
+DR_init_constraints_cookie::DR_init_constraints_cookie(
+ nsIFrame* aFrame,
+ ReflowInput* aState,
+ nscoord aCBWidth,
+ nscoord aCBHeight,
+ const nsMargin* aMargin,
+ const nsMargin* aPadding)
+ : mFrame(aFrame)
+ , mState(aState)
+{
+ MOZ_COUNT_CTOR(DR_init_constraints_cookie);
+ mValue = ReflowInput::DisplayInitConstraintsEnter(mFrame, mState,
+ aCBWidth, aCBHeight,
+ aMargin, aPadding);
+}
+
+DR_init_constraints_cookie::~DR_init_constraints_cookie()
+{
+ MOZ_COUNT_DTOR(DR_init_constraints_cookie);
+ ReflowInput::DisplayInitConstraintsExit(mFrame, mState, mValue);
+}
+
+DR_init_offsets_cookie::DR_init_offsets_cookie(
+ nsIFrame* aFrame,
+ SizeComputationInput* aState,
+ const LogicalSize& aPercentBasis,
+ const nsMargin* aMargin,
+ const nsMargin* aPadding)
+ : mFrame(aFrame)
+ , mState(aState)
+{
+ MOZ_COUNT_CTOR(DR_init_offsets_cookie);
+ mValue = SizeComputationInput::DisplayInitOffsetsEnter(mFrame, mState,
+ aPercentBasis,
+ aMargin, aPadding);
+}
+
+DR_init_offsets_cookie::~DR_init_offsets_cookie()
+{
+ MOZ_COUNT_DTOR(DR_init_offsets_cookie);
+ SizeComputationInput::DisplayInitOffsetsExit(mFrame, mState, mValue);
+}
+
+DR_init_type_cookie::DR_init_type_cookie(
+ nsIFrame* aFrame,
+ ReflowInput* aState)
+ : mFrame(aFrame)
+ , mState(aState)
+{
+ MOZ_COUNT_CTOR(DR_init_type_cookie);
+ mValue = ReflowInput::DisplayInitFrameTypeEnter(mFrame, mState);
+}
+
+DR_init_type_cookie::~DR_init_type_cookie()
+{
+ MOZ_COUNT_DTOR(DR_init_type_cookie);
+ ReflowInput::DisplayInitFrameTypeExit(mFrame, mState, mValue);
+}
+
+struct DR_FrameTypeInfo;
+struct DR_FrameTreeNode;
+struct DR_Rule;
+
+struct DR_State
+{
+ DR_State();
+ ~DR_State();
+ void Init();
+ void AddFrameTypeInfo(nsIAtom* aFrameType,
+ const char* aFrameNameAbbrev,
+ const char* aFrameName);
+ DR_FrameTypeInfo* GetFrameTypeInfo(nsIAtom* aFrameType);
+ DR_FrameTypeInfo* GetFrameTypeInfo(char* aFrameName);
+ void InitFrameTypeTable();
+ DR_FrameTreeNode* CreateTreeNode(nsIFrame* aFrame,
+ const ReflowInput* aReflowInput);
+ void FindMatchingRule(DR_FrameTreeNode& aNode);
+ bool RuleMatches(DR_Rule& aRule,
+ DR_FrameTreeNode& aNode);
+ bool GetToken(FILE* aFile,
+ char* aBuf,
+ size_t aBufSize);
+ DR_Rule* ParseRule(FILE* aFile);
+ void ParseRulesFile();
+ void AddRule(nsTArray<DR_Rule*>& aRules,
+ DR_Rule& aRule);
+ bool IsWhiteSpace(int c);
+ bool GetNumber(char* aBuf,
+ int32_t& aNumber);
+ void PrettyUC(nscoord aSize,
+ char* aBuf,
+ int aBufSize);
+ void PrintMargin(const char* tag, const nsMargin* aMargin);
+ void DisplayFrameTypeInfo(nsIFrame* aFrame,
+ int32_t aIndent);
+ void DeleteTreeNode(DR_FrameTreeNode& aNode);
+
+ bool mInited;
+ bool mActive;
+ int32_t mCount;
+ int32_t mAssert;
+ int32_t mIndent;
+ bool mIndentUndisplayedFrames;
+ bool mDisplayPixelErrors;
+ nsTArray<DR_Rule*> mWildRules;
+ nsTArray<DR_FrameTypeInfo> mFrameTypeTable;
+ // reflow specific state
+ nsTArray<DR_FrameTreeNode*> mFrameTreeLeaves;
+};
+
+static DR_State *DR_state; // the one and only DR_State
+
+struct DR_RulePart
+{
+ explicit DR_RulePart(nsIAtom* aFrameType) : mFrameType(aFrameType), mNext(0) {}
+ void Destroy();
+
+ nsIAtom* mFrameType;
+ DR_RulePart* mNext;
+};
+
+void DR_RulePart::Destroy()
+{
+ if (mNext) {
+ mNext->Destroy();
+ }
+ delete this;
+}
+
+struct DR_Rule
+{
+ DR_Rule() : mLength(0), mTarget(nullptr), mDisplay(false) {
+ MOZ_COUNT_CTOR(DR_Rule);
+ }
+ ~DR_Rule() {
+ if (mTarget) mTarget->Destroy();
+ MOZ_COUNT_DTOR(DR_Rule);
+ }
+ void AddPart(nsIAtom* aFrameType);
+
+ uint32_t mLength;
+ DR_RulePart* mTarget;
+ bool mDisplay;
+};
+
+void DR_Rule::AddPart(nsIAtom* aFrameType)
+{
+ DR_RulePart* newPart = new DR_RulePart(aFrameType);
+ newPart->mNext = mTarget;
+ mTarget = newPart;
+ mLength++;
+}
+
+struct DR_FrameTypeInfo
+{
+ DR_FrameTypeInfo(nsIAtom* aFrmeType, const char* aFrameNameAbbrev, const char* aFrameName);
+ ~DR_FrameTypeInfo() {
+ int32_t numElements;
+ numElements = mRules.Length();
+ for (int32_t i = numElements - 1; i >= 0; i--) {
+ delete mRules.ElementAt(i);
+ }
+ }
+
+ nsIAtom* mType;
+ char mNameAbbrev[16];
+ char mName[32];
+ nsTArray<DR_Rule*> mRules;
+private:
+ DR_FrameTypeInfo& operator=(const DR_FrameTypeInfo&) = delete;
+};
+
+DR_FrameTypeInfo::DR_FrameTypeInfo(nsIAtom* aFrameType,
+ const char* aFrameNameAbbrev,
+ const char* aFrameName)
+{
+ mType = aFrameType;
+ PL_strncpyz(mNameAbbrev, aFrameNameAbbrev, sizeof(mNameAbbrev));
+ PL_strncpyz(mName, aFrameName, sizeof(mName));
+}
+
+struct DR_FrameTreeNode
+{
+ DR_FrameTreeNode(nsIFrame* aFrame, DR_FrameTreeNode* aParent) : mFrame(aFrame), mParent(aParent), mDisplay(0), mIndent(0)
+ {
+ MOZ_COUNT_CTOR(DR_FrameTreeNode);
+ }
+
+ ~DR_FrameTreeNode()
+ {
+ MOZ_COUNT_DTOR(DR_FrameTreeNode);
+ }
+
+ nsIFrame* mFrame;
+ DR_FrameTreeNode* mParent;
+ bool mDisplay;
+ uint32_t mIndent;
+};
+
+// DR_State implementation
+
+DR_State::DR_State()
+: mInited(false), mActive(false), mCount(0), mAssert(-1), mIndent(0),
+ mIndentUndisplayedFrames(false), mDisplayPixelErrors(false)
+{
+ MOZ_COUNT_CTOR(DR_State);
+}
+
+void DR_State::Init()
+{
+ char* env = PR_GetEnv("GECKO_DISPLAY_REFLOW_ASSERT");
+ int32_t num;
+ if (env) {
+ if (GetNumber(env, num))
+ mAssert = num;
+ else
+ printf("GECKO_DISPLAY_REFLOW_ASSERT - invalid value = %s", env);
+ }
+
+ env = PR_GetEnv("GECKO_DISPLAY_REFLOW_INDENT_START");
+ if (env) {
+ if (GetNumber(env, num))
+ mIndent = num;
+ else
+ printf("GECKO_DISPLAY_REFLOW_INDENT_START - invalid value = %s", env);
+ }
+
+ env = PR_GetEnv("GECKO_DISPLAY_REFLOW_INDENT_UNDISPLAYED_FRAMES");
+ if (env) {
+ if (GetNumber(env, num))
+ mIndentUndisplayedFrames = num;
+ else
+ printf("GECKO_DISPLAY_REFLOW_INDENT_UNDISPLAYED_FRAMES - invalid value = %s", env);
+ }
+
+ env = PR_GetEnv("GECKO_DISPLAY_REFLOW_FLAG_PIXEL_ERRORS");
+ if (env) {
+ if (GetNumber(env, num))
+ mDisplayPixelErrors = num;
+ else
+ printf("GECKO_DISPLAY_REFLOW_FLAG_PIXEL_ERRORS - invalid value = %s", env);
+ }
+
+ InitFrameTypeTable();
+ ParseRulesFile();
+ mInited = true;
+}
+
+DR_State::~DR_State()
+{
+ MOZ_COUNT_DTOR(DR_State);
+ int32_t numElements, i;
+ numElements = mWildRules.Length();
+ for (i = numElements - 1; i >= 0; i--) {
+ delete mWildRules.ElementAt(i);
+ }
+ numElements = mFrameTreeLeaves.Length();
+ for (i = numElements - 1; i >= 0; i--) {
+ delete mFrameTreeLeaves.ElementAt(i);
+ }
+}
+
+bool DR_State::GetNumber(char* aBuf,
+ int32_t& aNumber)
+{
+ if (sscanf(aBuf, "%d", &aNumber) > 0)
+ return true;
+ else
+ return false;
+}
+
+bool DR_State::IsWhiteSpace(int c) {
+ return (c == ' ') || (c == '\t') || (c == '\n') || (c == '\r');
+}
+
+bool DR_State::GetToken(FILE* aFile,
+ char* aBuf,
+ size_t aBufSize)
+{
+ bool haveToken = false;
+ aBuf[0] = 0;
+ // get the 1st non whitespace char
+ int c = -1;
+ for (c = getc(aFile); (c > 0) && IsWhiteSpace(c); c = getc(aFile)) {
+ }
+
+ if (c > 0) {
+ haveToken = true;
+ aBuf[0] = c;
+ // get everything up to the next whitespace char
+ size_t cX;
+ for (cX = 1; cX + 1 < aBufSize ; cX++) {
+ c = getc(aFile);
+ if (c < 0) { // EOF
+ ungetc(' ', aFile);
+ break;
+ }
+ else {
+ if (IsWhiteSpace(c)) {
+ break;
+ }
+ else {
+ aBuf[cX] = c;
+ }
+ }
+ }
+ aBuf[cX] = 0;
+ }
+ return haveToken;
+}
+
+DR_Rule* DR_State::ParseRule(FILE* aFile)
+{
+ char buf[128];
+ int32_t doDisplay;
+ DR_Rule* rule = nullptr;
+ while (GetToken(aFile, buf, sizeof(buf))) {
+ if (GetNumber(buf, doDisplay)) {
+ if (rule) {
+ rule->mDisplay = !!doDisplay;
+ break;
+ }
+ else {
+ printf("unexpected token - %s \n", buf);
+ }
+ }
+ else {
+ if (!rule) {
+ rule = new DR_Rule;
+ }
+ if (strcmp(buf, "*") == 0) {
+ rule->AddPart(nullptr);
+ }
+ else {
+ DR_FrameTypeInfo* info = GetFrameTypeInfo(buf);
+ if (info) {
+ rule->AddPart(info->mType);
+ }
+ else {
+ printf("invalid frame type - %s \n", buf);
+ }
+ }
+ }
+ }
+ return rule;
+}
+
+void DR_State::AddRule(nsTArray<DR_Rule*>& aRules,
+ DR_Rule& aRule)
+{
+ int32_t numRules = aRules.Length();
+ for (int32_t ruleX = 0; ruleX < numRules; ruleX++) {
+ DR_Rule* rule = aRules.ElementAt(ruleX);
+ NS_ASSERTION(rule, "program error");
+ if (aRule.mLength > rule->mLength) {
+ aRules.InsertElementAt(ruleX, &aRule);
+ return;
+ }
+ }
+ aRules.AppendElement(&aRule);
+}
+
+void DR_State::ParseRulesFile()
+{
+ char* path = PR_GetEnv("GECKO_DISPLAY_REFLOW_RULES_FILE");
+ if (path) {
+ FILE* inFile = fopen(path, "r");
+ if (inFile) {
+ for (DR_Rule* rule = ParseRule(inFile); rule; rule = ParseRule(inFile)) {
+ if (rule->mTarget) {
+ nsIAtom* fType = rule->mTarget->mFrameType;
+ if (fType) {
+ DR_FrameTypeInfo* info = GetFrameTypeInfo(fType);
+ if (info) {
+ AddRule(info->mRules, *rule);
+ }
+ }
+ else {
+ AddRule(mWildRules, *rule);
+ }
+ mActive = true;
+ }
+ }
+
+ fclose(inFile);
+ }
+ }
+}
+
+
+void DR_State::AddFrameTypeInfo(nsIAtom* aFrameType,
+ const char* aFrameNameAbbrev,
+ const char* aFrameName)
+{
+ mFrameTypeTable.AppendElement(DR_FrameTypeInfo(aFrameType, aFrameNameAbbrev, aFrameName));
+}
+
+DR_FrameTypeInfo* DR_State::GetFrameTypeInfo(nsIAtom* aFrameType)
+{
+ int32_t numEntries = mFrameTypeTable.Length();
+ NS_ASSERTION(numEntries != 0, "empty FrameTypeTable");
+ for (int32_t i = 0; i < numEntries; i++) {
+ DR_FrameTypeInfo& info = mFrameTypeTable.ElementAt(i);
+ if (info.mType == aFrameType) {
+ return &info;
+ }
+ }
+ return &mFrameTypeTable.ElementAt(numEntries - 1); // return unknown frame type
+}
+
+DR_FrameTypeInfo* DR_State::GetFrameTypeInfo(char* aFrameName)
+{
+ int32_t numEntries = mFrameTypeTable.Length();
+ NS_ASSERTION(numEntries != 0, "empty FrameTypeTable");
+ for (int32_t i = 0; i < numEntries; i++) {
+ DR_FrameTypeInfo& info = mFrameTypeTable.ElementAt(i);
+ if ((strcmp(aFrameName, info.mName) == 0) || (strcmp(aFrameName, info.mNameAbbrev) == 0)) {
+ return &info;
+ }
+ }
+ return &mFrameTypeTable.ElementAt(numEntries - 1); // return unknown frame type
+}
+
+void DR_State::InitFrameTypeTable()
+{
+ AddFrameTypeInfo(nsGkAtoms::blockFrame, "block", "block");
+ AddFrameTypeInfo(nsGkAtoms::brFrame, "br", "br");
+ AddFrameTypeInfo(nsGkAtoms::bulletFrame, "bullet", "bullet");
+ AddFrameTypeInfo(nsGkAtoms::colorControlFrame, "color", "colorControl");
+ AddFrameTypeInfo(nsGkAtoms::gfxButtonControlFrame, "button", "gfxButtonControl");
+ AddFrameTypeInfo(nsGkAtoms::HTMLButtonControlFrame, "HTMLbutton", "HTMLButtonControl");
+ AddFrameTypeInfo(nsGkAtoms::HTMLCanvasFrame, "HTMLCanvas","HTMLCanvas");
+ AddFrameTypeInfo(nsGkAtoms::subDocumentFrame, "subdoc", "subDocument");
+ AddFrameTypeInfo(nsGkAtoms::imageFrame, "img", "image");
+ AddFrameTypeInfo(nsGkAtoms::inlineFrame, "inline", "inline");
+ AddFrameTypeInfo(nsGkAtoms::letterFrame, "letter", "letter");
+ AddFrameTypeInfo(nsGkAtoms::lineFrame, "line", "line");
+ AddFrameTypeInfo(nsGkAtoms::listControlFrame, "select", "select");
+ AddFrameTypeInfo(nsGkAtoms::objectFrame, "obj", "object");
+ AddFrameTypeInfo(nsGkAtoms::pageFrame, "page", "page");
+ AddFrameTypeInfo(nsGkAtoms::placeholderFrame, "place", "placeholder");
+ AddFrameTypeInfo(nsGkAtoms::canvasFrame, "canvas", "canvas");
+ AddFrameTypeInfo(nsGkAtoms::rootFrame, "root", "root");
+ AddFrameTypeInfo(nsGkAtoms::scrollFrame, "scroll", "scroll");
+ AddFrameTypeInfo(nsGkAtoms::tableCellFrame, "cell", "tableCell");
+ AddFrameTypeInfo(nsGkAtoms::bcTableCellFrame, "bcCell", "bcTableCell");
+ AddFrameTypeInfo(nsGkAtoms::tableColFrame, "col", "tableCol");
+ AddFrameTypeInfo(nsGkAtoms::tableColGroupFrame, "colG", "tableColGroup");
+ AddFrameTypeInfo(nsGkAtoms::tableFrame, "tbl", "table");
+ AddFrameTypeInfo(nsGkAtoms::tableWrapperFrame, "tblW", "tableWrapper");
+ AddFrameTypeInfo(nsGkAtoms::tableRowGroupFrame, "rowG", "tableRowGroup");
+ AddFrameTypeInfo(nsGkAtoms::tableRowFrame, "row", "tableRow");
+ AddFrameTypeInfo(nsGkAtoms::textInputFrame, "textCtl", "textInput");
+ AddFrameTypeInfo(nsGkAtoms::textFrame, "text", "text");
+ AddFrameTypeInfo(nsGkAtoms::viewportFrame, "VP", "viewport");
+#ifdef MOZ_XUL
+ AddFrameTypeInfo(nsGkAtoms::XULLabelFrame, "XULLabel", "XULLabel");
+ AddFrameTypeInfo(nsGkAtoms::boxFrame, "Box", "Box");
+ AddFrameTypeInfo(nsGkAtoms::sliderFrame, "Slider", "Slider");
+ AddFrameTypeInfo(nsGkAtoms::popupSetFrame, "PopupSet", "PopupSet");
+#endif
+ AddFrameTypeInfo(nullptr, "unknown", "unknown");
+}
+
+
+void DR_State::DisplayFrameTypeInfo(nsIFrame* aFrame,
+ int32_t aIndent)
+{
+ DR_FrameTypeInfo* frameTypeInfo = GetFrameTypeInfo(aFrame->GetType());
+ if (frameTypeInfo) {
+ for (int32_t i = 0; i < aIndent; i++) {
+ printf(" ");
+ }
+ if(!strcmp(frameTypeInfo->mNameAbbrev, "unknown")) {
+ if (aFrame) {
+ nsAutoString name;
+ aFrame->GetFrameName(name);
+ printf("%s %p ", NS_LossyConvertUTF16toASCII(name).get(), (void*)aFrame);
+ }
+ else {
+ printf("%s %p ", frameTypeInfo->mNameAbbrev, (void*)aFrame);
+ }
+ }
+ else {
+ printf("%s %p ", frameTypeInfo->mNameAbbrev, (void*)aFrame);
+ }
+ }
+}
+
+bool DR_State::RuleMatches(DR_Rule& aRule,
+ DR_FrameTreeNode& aNode)
+{
+ NS_ASSERTION(aRule.mTarget, "program error");
+
+ DR_RulePart* rulePart;
+ DR_FrameTreeNode* parentNode;
+ for (rulePart = aRule.mTarget->mNext, parentNode = aNode.mParent;
+ rulePart && parentNode;
+ rulePart = rulePart->mNext, parentNode = parentNode->mParent) {
+ if (rulePart->mFrameType) {
+ if (parentNode->mFrame) {
+ if (rulePart->mFrameType != parentNode->mFrame->GetType()) {
+ return false;
+ }
+ }
+ else NS_ASSERTION(false, "program error");
+ }
+ // else wild card match
+ }
+ return true;
+}
+
+void DR_State::FindMatchingRule(DR_FrameTreeNode& aNode)
+{
+ if (!aNode.mFrame) {
+ NS_ASSERTION(false, "invalid DR_FrameTreeNode \n");
+ return;
+ }
+
+ bool matchingRule = false;
+
+ DR_FrameTypeInfo* info = GetFrameTypeInfo(aNode.mFrame->GetType());
+ NS_ASSERTION(info, "program error");
+ int32_t numRules = info->mRules.Length();
+ for (int32_t ruleX = 0; ruleX < numRules; ruleX++) {
+ DR_Rule* rule = info->mRules.ElementAt(ruleX);
+ if (rule && RuleMatches(*rule, aNode)) {
+ aNode.mDisplay = rule->mDisplay;
+ matchingRule = true;
+ break;
+ }
+ }
+ if (!matchingRule) {
+ int32_t numWildRules = mWildRules.Length();
+ for (int32_t ruleX = 0; ruleX < numWildRules; ruleX++) {
+ DR_Rule* rule = mWildRules.ElementAt(ruleX);
+ if (rule && RuleMatches(*rule, aNode)) {
+ aNode.mDisplay = rule->mDisplay;
+ break;
+ }
+ }
+ }
+}
+
+DR_FrameTreeNode* DR_State::CreateTreeNode(nsIFrame* aFrame,
+ const ReflowInput* aReflowInput)
+{
+ // find the frame of the parent reflow state (usually just the parent of aFrame)
+ nsIFrame* parentFrame;
+ if (aReflowInput) {
+ const ReflowInput* parentRI = aReflowInput->mParentReflowInput;
+ parentFrame = (parentRI) ? parentRI->mFrame : nullptr;
+ } else {
+ parentFrame = aFrame->GetParent();
+ }
+
+ // find the parent tree node leaf
+ DR_FrameTreeNode* parentNode = nullptr;
+
+ DR_FrameTreeNode* lastLeaf = nullptr;
+ if(mFrameTreeLeaves.Length())
+ lastLeaf = mFrameTreeLeaves.ElementAt(mFrameTreeLeaves.Length() - 1);
+ if (lastLeaf) {
+ for (parentNode = lastLeaf; parentNode && (parentNode->mFrame != parentFrame); parentNode = parentNode->mParent) {
+ }
+ }
+ DR_FrameTreeNode* newNode = new DR_FrameTreeNode(aFrame, parentNode);
+ FindMatchingRule(*newNode);
+
+ newNode->mIndent = mIndent;
+ if (newNode->mDisplay || mIndentUndisplayedFrames) {
+ ++mIndent;
+ }
+
+ if (lastLeaf && (lastLeaf == parentNode)) {
+ mFrameTreeLeaves.RemoveElementAt(mFrameTreeLeaves.Length() - 1);
+ }
+ mFrameTreeLeaves.AppendElement(newNode);
+ mCount++;
+
+ return newNode;
+}
+
+void DR_State::PrettyUC(nscoord aSize,
+ char* aBuf,
+ int aBufSize)
+{
+ if (NS_UNCONSTRAINEDSIZE == aSize) {
+ strcpy(aBuf, "UC");
+ }
+ else {
+ if ((nscoord)0xdeadbeefU == aSize)
+ {
+ strcpy(aBuf, "deadbeef");
+ }
+ else {
+ snprintf(aBuf, aBufSize, "%d", aSize);
+ }
+ }
+}
+
+void DR_State::PrintMargin(const char *tag, const nsMargin* aMargin)
+{
+ if (aMargin) {
+ char t[16], r[16], b[16], l[16];
+ PrettyUC(aMargin->top, t, 16);
+ PrettyUC(aMargin->right, r, 16);
+ PrettyUC(aMargin->bottom, b, 16);
+ PrettyUC(aMargin->left, l, 16);
+ printf(" %s=%s,%s,%s,%s", tag, t, r, b, l);
+ } else {
+ // use %p here for consistency with other null-pointer printouts
+ printf(" %s=%p", tag, (void*)aMargin);
+ }
+}
+
+void DR_State::DeleteTreeNode(DR_FrameTreeNode& aNode)
+{
+ mFrameTreeLeaves.RemoveElement(&aNode);
+ int32_t numLeaves = mFrameTreeLeaves.Length();
+ if ((0 == numLeaves) || (aNode.mParent != mFrameTreeLeaves.ElementAt(numLeaves - 1))) {
+ mFrameTreeLeaves.AppendElement(aNode.mParent);
+ }
+
+ if (aNode.mDisplay || mIndentUndisplayedFrames) {
+ --mIndent;
+ }
+ // delete the tree node
+ delete &aNode;
+}
+
+static void
+CheckPixelError(nscoord aSize,
+ int32_t aPixelToTwips)
+{
+ if (NS_UNCONSTRAINEDSIZE != aSize) {
+ if ((aSize % aPixelToTwips) > 0) {
+ printf("VALUE %d is not a whole pixel \n", aSize);
+ }
+ }
+}
+
+static void DisplayReflowEnterPrint(nsPresContext* aPresContext,
+ nsIFrame* aFrame,
+ const ReflowInput& aReflowInput,
+ DR_FrameTreeNode& aTreeNode,
+ bool aChanged)
+{
+ if (aTreeNode.mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, aTreeNode.mIndent);
+
+ char width[16];
+ char height[16];
+
+ DR_state->PrettyUC(aReflowInput.AvailableWidth(), width, 16);
+ DR_state->PrettyUC(aReflowInput.AvailableHeight(), height, 16);
+ printf("Reflow a=%s,%s ", width, height);
+
+ DR_state->PrettyUC(aReflowInput.ComputedWidth(), width, 16);
+ DR_state->PrettyUC(aReflowInput.ComputedHeight(), height, 16);
+ printf("c=%s,%s ", width, height);
+
+ if (aFrame->GetStateBits() & NS_FRAME_IS_DIRTY)
+ printf("dirty ");
+
+ if (aFrame->GetStateBits() & NS_FRAME_HAS_DIRTY_CHILDREN)
+ printf("dirty-children ");
+
+ if (aReflowInput.mFlags.mSpecialBSizeReflow)
+ printf("special-bsize ");
+
+ if (aReflowInput.IsHResize())
+ printf("h-resize ");
+
+ if (aReflowInput.IsVResize())
+ printf("v-resize ");
+
+ nsIFrame* inFlow = aFrame->GetPrevInFlow();
+ if (inFlow) {
+ printf("pif=%p ", (void*)inFlow);
+ }
+ inFlow = aFrame->GetNextInFlow();
+ if (inFlow) {
+ printf("nif=%p ", (void*)inFlow);
+ }
+ if (aChanged)
+ printf("CHANGED \n");
+ else
+ printf("cnt=%d \n", DR_state->mCount);
+ if (DR_state->mDisplayPixelErrors) {
+ int32_t p2t = aPresContext->AppUnitsPerDevPixel();
+ CheckPixelError(aReflowInput.AvailableWidth(), p2t);
+ CheckPixelError(aReflowInput.AvailableHeight(), p2t);
+ CheckPixelError(aReflowInput.ComputedWidth(), p2t);
+ CheckPixelError(aReflowInput.ComputedHeight(), p2t);
+ }
+ }
+}
+
+void* nsFrame::DisplayReflowEnter(nsPresContext* aPresContext,
+ nsIFrame* aFrame,
+ const ReflowInput& aReflowInput)
+{
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ NS_ASSERTION(aFrame, "invalid call");
+
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, &aReflowInput);
+ if (treeNode) {
+ DisplayReflowEnterPrint(aPresContext, aFrame, aReflowInput, *treeNode, false);
+ }
+ return treeNode;
+}
+
+void* nsFrame::DisplayLayoutEnter(nsIFrame* aFrame)
+{
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ NS_ASSERTION(aFrame, "invalid call");
+
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, nullptr);
+ if (treeNode && treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ printf("XULLayout\n");
+ }
+ return treeNode;
+}
+
+void* nsFrame::DisplayIntrinsicISizeEnter(nsIFrame* aFrame,
+ const char* aType)
+{
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ NS_ASSERTION(aFrame, "invalid call");
+
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, nullptr);
+ if (treeNode && treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ printf("Get%sWidth\n", aType);
+ }
+ return treeNode;
+}
+
+void* nsFrame::DisplayIntrinsicSizeEnter(nsIFrame* aFrame,
+ const char* aType)
+{
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ NS_ASSERTION(aFrame, "invalid call");
+
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, nullptr);
+ if (treeNode && treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ printf("Get%sSize\n", aType);
+ }
+ return treeNode;
+}
+
+void nsFrame::DisplayReflowExit(nsPresContext* aPresContext,
+ nsIFrame* aFrame,
+ ReflowOutput& aMetrics,
+ nsReflowStatus aStatus,
+ void* aFrameTreeNode)
+{
+ if (!DR_state->mActive) return;
+
+ NS_ASSERTION(aFrame, "DisplayReflowExit - invalid call");
+ if (!aFrameTreeNode) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aFrameTreeNode;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+
+ char width[16];
+ char height[16];
+ char x[16];
+ char y[16];
+ DR_state->PrettyUC(aMetrics.Width(), width, 16);
+ DR_state->PrettyUC(aMetrics.Height(), height, 16);
+ printf("Reflow d=%s,%s", width, height);
+
+ if (!NS_FRAME_IS_FULLY_COMPLETE(aStatus)) {
+ printf(" status=0x%x", aStatus);
+ }
+ if (aFrame->HasOverflowAreas()) {
+ DR_state->PrettyUC(aMetrics.VisualOverflow().x, x, 16);
+ DR_state->PrettyUC(aMetrics.VisualOverflow().y, y, 16);
+ DR_state->PrettyUC(aMetrics.VisualOverflow().width, width, 16);
+ DR_state->PrettyUC(aMetrics.VisualOverflow().height, height, 16);
+ printf(" vis-o=(%s,%s) %s x %s", x, y, width, height);
+
+ nsRect storedOverflow = aFrame->GetVisualOverflowRect();
+ DR_state->PrettyUC(storedOverflow.x, x, 16);
+ DR_state->PrettyUC(storedOverflow.y, y, 16);
+ DR_state->PrettyUC(storedOverflow.width, width, 16);
+ DR_state->PrettyUC(storedOverflow.height, height, 16);
+ printf(" vis-sto=(%s,%s) %s x %s", x, y, width, height);
+
+ DR_state->PrettyUC(aMetrics.ScrollableOverflow().x, x, 16);
+ DR_state->PrettyUC(aMetrics.ScrollableOverflow().y, y, 16);
+ DR_state->PrettyUC(aMetrics.ScrollableOverflow().width, width, 16);
+ DR_state->PrettyUC(aMetrics.ScrollableOverflow().height, height, 16);
+ printf(" scr-o=(%s,%s) %s x %s", x, y, width, height);
+
+ storedOverflow = aFrame->GetScrollableOverflowRect();
+ DR_state->PrettyUC(storedOverflow.x, x, 16);
+ DR_state->PrettyUC(storedOverflow.y, y, 16);
+ DR_state->PrettyUC(storedOverflow.width, width, 16);
+ DR_state->PrettyUC(storedOverflow.height, height, 16);
+ printf(" scr-sto=(%s,%s) %s x %s", x, y, width, height);
+ }
+ printf("\n");
+ if (DR_state->mDisplayPixelErrors) {
+ int32_t p2t = aPresContext->AppUnitsPerDevPixel();
+ CheckPixelError(aMetrics.Width(), p2t);
+ CheckPixelError(aMetrics.Height(), p2t);
+ }
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+void nsFrame::DisplayLayoutExit(nsIFrame* aFrame,
+ void* aFrameTreeNode)
+{
+ if (!DR_state->mActive) return;
+
+ NS_ASSERTION(aFrame, "non-null frame required");
+ if (!aFrameTreeNode) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aFrameTreeNode;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ nsRect rect = aFrame->GetRect();
+ printf("XULLayout=%d,%d,%d,%d\n", rect.x, rect.y, rect.width, rect.height);
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+void nsFrame::DisplayIntrinsicISizeExit(nsIFrame* aFrame,
+ const char* aType,
+ nscoord aResult,
+ void* aFrameTreeNode)
+{
+ if (!DR_state->mActive) return;
+
+ NS_ASSERTION(aFrame, "non-null frame required");
+ if (!aFrameTreeNode) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aFrameTreeNode;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ char width[16];
+ DR_state->PrettyUC(aResult, width, 16);
+ printf("Get%sWidth=%s\n", aType, width);
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+void nsFrame::DisplayIntrinsicSizeExit(nsIFrame* aFrame,
+ const char* aType,
+ nsSize aResult,
+ void* aFrameTreeNode)
+{
+ if (!DR_state->mActive) return;
+
+ NS_ASSERTION(aFrame, "non-null frame required");
+ if (!aFrameTreeNode) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aFrameTreeNode;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+
+ char width[16];
+ char height[16];
+ DR_state->PrettyUC(aResult.width, width, 16);
+ DR_state->PrettyUC(aResult.height, height, 16);
+ printf("Get%sSize=%s,%s\n", aType, width, height);
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+/* static */ void
+nsFrame::DisplayReflowStartup()
+{
+ DR_state = new DR_State();
+}
+
+/* static */ void
+nsFrame::DisplayReflowShutdown()
+{
+ delete DR_state;
+ DR_state = nullptr;
+}
+
+void DR_cookie::Change() const
+{
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)mValue;
+ if (treeNode && treeNode->mDisplay) {
+ DisplayReflowEnterPrint(mPresContext, mFrame, mReflowInput, *treeNode, true);
+ }
+}
+
+/* static */ void*
+ReflowInput::DisplayInitConstraintsEnter(nsIFrame* aFrame,
+ ReflowInput* aState,
+ nscoord aContainingBlockWidth,
+ nscoord aContainingBlockHeight,
+ const nsMargin* aBorder,
+ const nsMargin* aPadding)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, aState);
+ if (treeNode && treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+
+ printf("InitConstraints parent=%p",
+ (void*)aState->mParentReflowInput);
+
+ char width[16];
+ char height[16];
+
+ DR_state->PrettyUC(aContainingBlockWidth, width, 16);
+ DR_state->PrettyUC(aContainingBlockHeight, height, 16);
+ printf(" cb=%s,%s", width, height);
+
+ DR_state->PrettyUC(aState->AvailableWidth(), width, 16);
+ DR_state->PrettyUC(aState->AvailableHeight(), height, 16);
+ printf(" as=%s,%s", width, height);
+
+ DR_state->PrintMargin("b", aBorder);
+ DR_state->PrintMargin("p", aPadding);
+ putchar('\n');
+ }
+ return treeNode;
+}
+
+/* static */ void
+ReflowInput::DisplayInitConstraintsExit(nsIFrame* aFrame,
+ ReflowInput* aState,
+ void* aValue)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mActive) return;
+ if (!aValue) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aValue;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ char cmiw[16], cw[16], cmxw[16], cmih[16], ch[16], cmxh[16];
+ DR_state->PrettyUC(aState->ComputedMinWidth(), cmiw, 16);
+ DR_state->PrettyUC(aState->ComputedWidth(), cw, 16);
+ DR_state->PrettyUC(aState->ComputedMaxWidth(), cmxw, 16);
+ DR_state->PrettyUC(aState->ComputedMinHeight(), cmih, 16);
+ DR_state->PrettyUC(aState->ComputedHeight(), ch, 16);
+ DR_state->PrettyUC(aState->ComputedMaxHeight(), cmxh, 16);
+ printf("InitConstraints= cw=(%s <= %s <= %s) ch=(%s <= %s <= %s)",
+ cmiw, cw, cmxw, cmih, ch, cmxh);
+ DR_state->PrintMargin("co", &aState->ComputedPhysicalOffsets());
+ putchar('\n');
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+
+/* static */ void*
+SizeComputationInput::DisplayInitOffsetsEnter(nsIFrame* aFrame,
+ SizeComputationInput* aState,
+ const LogicalSize& aPercentBasis,
+ const nsMargin* aBorder,
+ const nsMargin* aPadding)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ // aState is not necessarily a ReflowInput
+ DR_FrameTreeNode* treeNode = DR_state->CreateTreeNode(aFrame, nullptr);
+ if (treeNode && treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+
+ char horizPctBasisStr[16];
+ char vertPctBasisStr[16];
+ WritingMode wm = aState->GetWritingMode();
+ DR_state->PrettyUC(aPercentBasis.ISize(wm), horizPctBasisStr, 16);
+ DR_state->PrettyUC(aPercentBasis.BSize(wm), vertPctBasisStr, 16);
+ printf("InitOffsets pct_basis=%s,%s", horizPctBasisStr, vertPctBasisStr);
+
+ DR_state->PrintMargin("b", aBorder);
+ DR_state->PrintMargin("p", aPadding);
+ putchar('\n');
+ }
+ return treeNode;
+}
+
+/* static */ void
+SizeComputationInput::DisplayInitOffsetsExit(nsIFrame* aFrame,
+ SizeComputationInput* aState,
+ void* aValue)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mActive) return;
+ if (!aValue) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aValue;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ printf("InitOffsets=");
+ DR_state->PrintMargin("m", &aState->ComputedPhysicalMargin());
+ DR_state->PrintMargin("p", &aState->ComputedPhysicalPadding());
+ DR_state->PrintMargin("p+b", &aState->ComputedPhysicalBorderPadding());
+ putchar('\n');
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+/* static */ void*
+ReflowInput::DisplayInitFrameTypeEnter(nsIFrame* aFrame,
+ ReflowInput* aState)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mInited) DR_state->Init();
+ if (!DR_state->mActive) return nullptr;
+
+ // we don't print anything here
+ return DR_state->CreateTreeNode(aFrame, aState);
+}
+
+/* static */ void
+ReflowInput::DisplayInitFrameTypeExit(nsIFrame* aFrame,
+ ReflowInput* aState,
+ void* aValue)
+{
+ NS_PRECONDITION(aFrame, "non-null frame required");
+ NS_PRECONDITION(aState, "non-null state required");
+
+ if (!DR_state->mActive) return;
+ if (!aValue) return;
+
+ DR_FrameTreeNode* treeNode = (DR_FrameTreeNode*)aValue;
+ if (treeNode->mDisplay) {
+ DR_state->DisplayFrameTypeInfo(aFrame, treeNode->mIndent);
+ printf("InitFrameType");
+
+ const nsStyleDisplay *disp = aState->mStyleDisplay;
+
+ if (aFrame->GetStateBits() & NS_FRAME_OUT_OF_FLOW)
+ printf(" out-of-flow");
+ if (aFrame->GetPrevInFlow())
+ printf(" prev-in-flow");
+ if (aFrame->IsAbsolutelyPositioned())
+ printf(" abspos");
+ if (aFrame->IsFloating())
+ printf(" float");
+
+ // This array must exactly match the StyleDisplay enum.
+ const char *const displayTypes[] = {
+ "none", "block", "inline", "inline-block", "list-item", "table",
+ "inline-table", "table-row-group", "table-column", "table-column",
+ "table-column-group", "table-header-group", "table-footer-group",
+ "table-row", "table-cell", "table-caption", "flex", "inline-flex",
+ "grid", "inline-grid", "ruby", "ruby-base", "ruby-base-container",
+ "ruby-text", "ruby-text-container", "contents", "-webkit-box",
+ "-webkit-inline-box", "box", "inline-box",
+#ifdef MOZ_XUL
+ "grid", "inline-grid", "grid-group", "grid-line", "stack",
+ "inline-stack", "deck", "groupbox", "popup",
+#endif
+ };
+ const uint32_t display = static_cast<uint32_t>(disp->mDisplay);
+ if (display >= ArrayLength(displayTypes))
+ printf(" display=%u", display);
+ else
+ printf(" display=%s", displayTypes[display]);
+
+ // This array must exactly match the NS_CSS_FRAME_TYPE constants.
+ const char *const cssFrameTypes[] = {
+ "unknown", "inline", "block", "floating", "absolute", "internal-table"
+ };
+ nsCSSFrameType bareType = NS_FRAME_GET_TYPE(aState->mFrameType);
+ bool repNoBlock = NS_FRAME_IS_REPLACED_NOBLOCK(aState->mFrameType);
+ bool repBlock = NS_FRAME_IS_REPLACED_CONTAINS_BLOCK(aState->mFrameType);
+
+ if (bareType >= ArrayLength(cssFrameTypes)) {
+ printf(" result=type %u", bareType);
+ } else {
+ printf(" result=%s", cssFrameTypes[bareType]);
+ }
+ printf("%s%s\n", repNoBlock ? " +rep" : "", repBlock ? " +repBlk" : "");
+ }
+ DR_state->DeleteTreeNode(*treeNode);
+}
+
+#endif
+// End Display Reflow
+
+#endif