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-rw-r--r--layout/forms/nsRangeFrame.cpp949
1 files changed, 949 insertions, 0 deletions
diff --git a/layout/forms/nsRangeFrame.cpp b/layout/forms/nsRangeFrame.cpp
new file mode 100644
index 000000000..7590da066
--- /dev/null
+++ b/layout/forms/nsRangeFrame.cpp
@@ -0,0 +1,949 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 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/. */
+
+#include "nsRangeFrame.h"
+
+#include "mozilla/EventStates.h"
+#include "mozilla/TouchEvents.h"
+
+#include "nsContentCreatorFunctions.h"
+#include "nsContentList.h"
+#include "nsContentUtils.h"
+#include "nsCSSPseudoElements.h"
+#include "nsCSSRendering.h"
+#include "nsFormControlFrame.h"
+#include "nsIContent.h"
+#include "nsIDocument.h"
+#include "nsNameSpaceManager.h"
+#include "nsIPresShell.h"
+#include "nsGkAtoms.h"
+#include "mozilla/dom/HTMLInputElement.h"
+#include "nsPresContext.h"
+#include "nsNodeInfoManager.h"
+#include "nsRenderingContext.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/StyleSetHandle.h"
+#include "mozilla/StyleSetHandleInlines.h"
+#include "nsThemeConstants.h"
+
+#ifdef ACCESSIBILITY
+#include "nsAccessibilityService.h"
+#endif
+
+#define LONG_SIDE_TO_SHORT_SIDE_RATIO 10
+
+using namespace mozilla;
+using namespace mozilla::dom;
+using namespace mozilla::image;
+
+NS_IMPL_ISUPPORTS(nsRangeFrame::DummyTouchListener, nsIDOMEventListener)
+
+nsIFrame*
+NS_NewRangeFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsRangeFrame(aContext);
+}
+
+nsRangeFrame::nsRangeFrame(nsStyleContext* aContext)
+ : nsContainerFrame(aContext)
+{
+}
+
+nsRangeFrame::~nsRangeFrame()
+{
+#ifdef DEBUG
+ if (mOuterFocusStyle) {
+ mOuterFocusStyle->FrameRelease();
+ }
+#endif
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsRangeFrame)
+
+NS_QUERYFRAME_HEAD(nsRangeFrame)
+ NS_QUERYFRAME_ENTRY(nsRangeFrame)
+ NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+void
+nsRangeFrame::Init(nsIContent* aContent,
+ nsContainerFrame* aParent,
+ nsIFrame* aPrevInFlow)
+{
+ // With APZ enabled, touch events may be handled directly by the APZC code
+ // if the APZ knows that there is no content interested in the touch event.
+ // The range input element *is* interested in touch events, but doesn't use
+ // the usual mechanism (i.e. registering an event listener) to handle touch
+ // input. Instead, we do it here so that the APZ finds out about it, and
+ // makes sure to wait for content to run handlers before handling the touch
+ // input itself.
+ if (!mDummyTouchListener) {
+ mDummyTouchListener = new DummyTouchListener();
+ }
+ aContent->AddEventListener(NS_LITERAL_STRING("touchstart"), mDummyTouchListener, false);
+
+ StyleSetHandle styleSet = PresContext()->StyleSet();
+
+ mOuterFocusStyle =
+ styleSet->ProbePseudoElementStyle(aContent->AsElement(),
+ CSSPseudoElementType::mozFocusOuter,
+ StyleContext());
+
+ return nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
+}
+
+void
+nsRangeFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+ NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
+ "nsRangeFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+
+ mContent->RemoveEventListener(NS_LITERAL_STRING("touchstart"), mDummyTouchListener, false);
+
+ nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
+ nsContentUtils::DestroyAnonymousContent(&mTrackDiv);
+ nsContentUtils::DestroyAnonymousContent(&mProgressDiv);
+ nsContentUtils::DestroyAnonymousContent(&mThumbDiv);
+ nsContainerFrame::DestroyFrom(aDestructRoot);
+}
+
+nsresult
+nsRangeFrame::MakeAnonymousDiv(Element** aResult,
+ CSSPseudoElementType aPseudoType,
+ nsTArray<ContentInfo>& aElements)
+{
+ nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
+ RefPtr<Element> resultElement = doc->CreateHTMLElement(nsGkAtoms::div);
+
+ // Associate the pseudo-element with the anonymous child.
+ RefPtr<nsStyleContext> newStyleContext =
+ PresContext()->StyleSet()->ResolvePseudoElementStyle(mContent->AsElement(),
+ aPseudoType,
+ StyleContext(),
+ resultElement);
+
+ if (!aElements.AppendElement(ContentInfo(resultElement, newStyleContext))) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ resultElement.forget(aResult);
+ return NS_OK;
+}
+
+nsresult
+nsRangeFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
+{
+ nsresult rv;
+
+ // Create the ::-moz-range-track pseuto-element (a div):
+ rv = MakeAnonymousDiv(getter_AddRefs(mTrackDiv),
+ CSSPseudoElementType::mozRangeTrack,
+ aElements);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // Create the ::-moz-range-progress pseudo-element (a div):
+ rv = MakeAnonymousDiv(getter_AddRefs(mProgressDiv),
+ CSSPseudoElementType::mozRangeProgress,
+ aElements);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // Create the ::-moz-range-thumb pseudo-element (a div):
+ rv = MakeAnonymousDiv(getter_AddRefs(mThumbDiv),
+ CSSPseudoElementType::mozRangeThumb,
+ aElements);
+ return rv;
+}
+
+void
+nsRangeFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter)
+{
+ if (mTrackDiv) {
+ aElements.AppendElement(mTrackDiv);
+ }
+
+ if (mProgressDiv) {
+ aElements.AppendElement(mProgressDiv);
+ }
+
+ if (mThumbDiv) {
+ aElements.AppendElement(mThumbDiv);
+ }
+}
+
+class nsDisplayRangeFocusRing : public nsDisplayItem
+{
+public:
+ nsDisplayRangeFocusRing(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
+ : nsDisplayItem(aBuilder, aFrame) {
+ MOZ_COUNT_CTOR(nsDisplayRangeFocusRing);
+ }
+#ifdef NS_BUILD_REFCNT_LOGGING
+ virtual ~nsDisplayRangeFocusRing() {
+ MOZ_COUNT_DTOR(nsDisplayRangeFocusRing);
+ }
+#endif
+
+ nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override;
+ void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
+ const nsDisplayItemGeometry* aGeometry,
+ nsRegion *aInvalidRegion) override;
+ virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) override;
+ virtual void Paint(nsDisplayListBuilder* aBuilder, nsRenderingContext* aCtx) override;
+ NS_DISPLAY_DECL_NAME("RangeFocusRing", TYPE_RANGE_FOCUS_RING)
+};
+
+nsDisplayItemGeometry*
+nsDisplayRangeFocusRing::AllocateGeometry(nsDisplayListBuilder* aBuilder)
+{
+ return new nsDisplayItemGenericImageGeometry(this, aBuilder);
+}
+
+void
+nsDisplayRangeFocusRing::ComputeInvalidationRegion(
+ nsDisplayListBuilder* aBuilder,
+ const nsDisplayItemGeometry* aGeometry,
+ nsRegion* aInvalidRegion)
+{
+ auto geometry =
+ static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
+
+ if (aBuilder->ShouldSyncDecodeImages() &&
+ geometry->ShouldInvalidateToSyncDecodeImages()) {
+ bool snap;
+ aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
+ }
+
+ nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
+}
+
+nsRect
+nsDisplayRangeFocusRing::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
+{
+ *aSnap = false;
+ nsRect rect(ToReferenceFrame(), Frame()->GetSize());
+
+ // We want to paint as if specifying a border for ::-moz-focus-outer
+ // specifies an outline for our frame, so inflate by the border widths:
+ nsStyleContext* styleContext =
+ static_cast<nsRangeFrame*>(mFrame)->mOuterFocusStyle;
+ MOZ_ASSERT(styleContext, "We only exist if mOuterFocusStyle is non-null");
+ rect.Inflate(styleContext->StyleBorder()->GetComputedBorder());
+
+ return rect;
+}
+
+void
+nsDisplayRangeFocusRing::Paint(nsDisplayListBuilder* aBuilder,
+ nsRenderingContext* aCtx)
+{
+ bool unused;
+ nsStyleContext* styleContext =
+ static_cast<nsRangeFrame*>(mFrame)->mOuterFocusStyle;
+ MOZ_ASSERT(styleContext, "We only exist if mOuterFocusStyle is non-null");
+
+ PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
+ ? PaintBorderFlags::SYNC_DECODE_IMAGES
+ : PaintBorderFlags();
+
+ DrawResult result =
+ nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame,
+ mVisibleRect, GetBounds(aBuilder, &unused),
+ styleContext, flags);
+
+ nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
+}
+
+void
+nsRangeFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
+ const nsRect& aDirtyRect,
+ const nsDisplayListSet& aLists)
+{
+ if (IsThemed()) {
+ DisplayBorderBackgroundOutline(aBuilder, aLists);
+ // Only create items for the thumb. Specifically, we do not want
+ // the track to paint, since *our* background is used to paint
+ // the track, and we don't want the unthemed track painting over
+ // the top of the themed track.
+ // This logic is copied from
+ // nsContainerFrame::BuildDisplayListForNonBlockChildren as
+ // called by BuildDisplayListForInline.
+ nsIFrame* thumb = mThumbDiv->GetPrimaryFrame();
+ if (thumb) {
+ nsDisplayListSet set(aLists, aLists.Content());
+ BuildDisplayListForChild(aBuilder, thumb, aDirtyRect, set, DISPLAY_CHILD_INLINE);
+ }
+ } else {
+ BuildDisplayListForInline(aBuilder, aDirtyRect, aLists);
+ }
+
+ // Draw a focus outline if appropriate:
+
+ if (!aBuilder->IsForPainting() ||
+ !IsVisibleForPainting(aBuilder)) {
+ // we don't want the focus ring item for hit-testing or if the item isn't
+ // in the area being [re]painted
+ return;
+ }
+
+ EventStates eventStates = mContent->AsElement()->State();
+ if (eventStates.HasState(NS_EVENT_STATE_DISABLED) ||
+ !eventStates.HasState(NS_EVENT_STATE_FOCUSRING)) {
+ return; // can't have focus or doesn't match :-moz-focusring
+ }
+
+ if (!mOuterFocusStyle ||
+ !mOuterFocusStyle->StyleBorder()->HasBorder()) {
+ // no ::-moz-focus-outer specified border (how style specifies a focus ring
+ // for range)
+ return;
+ }
+
+ const nsStyleDisplay *disp = StyleDisplay();
+ if (IsThemed(disp) &&
+ PresContext()->GetTheme()->ThemeDrawsFocusForWidget(disp->mAppearance)) {
+ return; // the native theme displays its own visual indication of focus
+ }
+
+ aLists.Content()->AppendNewToTop(
+ new (aBuilder) nsDisplayRangeFocusRing(aBuilder, this));
+}
+
+void
+nsRangeFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus)
+{
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsRangeFrame");
+ DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+
+ NS_ASSERTION(mTrackDiv, "::-moz-range-track div must exist!");
+ NS_ASSERTION(mProgressDiv, "::-moz-range-progress div must exist!");
+ NS_ASSERTION(mThumbDiv, "::-moz-range-thumb div must exist!");
+ NS_ASSERTION(!GetPrevContinuation() && !GetNextContinuation(),
+ "nsRangeFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+
+ if (mState & NS_FRAME_FIRST_REFLOW) {
+ nsFormControlFrame::RegUnRegAccessKey(this, true);
+ }
+
+ WritingMode wm = aReflowInput.GetWritingMode();
+ nscoord computedBSize = aReflowInput.ComputedBSize();
+ if (computedBSize == NS_AUTOHEIGHT) {
+ computedBSize = 0;
+ }
+ LogicalSize
+ finalSize(wm,
+ aReflowInput.ComputedISize() +
+ aReflowInput.ComputedLogicalBorderPadding().IStartEnd(wm),
+ computedBSize +
+ aReflowInput.ComputedLogicalBorderPadding().BStartEnd(wm));
+ aDesiredSize.SetSize(wm, finalSize);
+
+ ReflowAnonymousContent(aPresContext, aDesiredSize, aReflowInput);
+
+ aDesiredSize.SetOverflowAreasToDesiredBounds();
+
+ nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
+ if (trackFrame) {
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, trackFrame);
+ }
+
+ nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
+ if (rangeProgressFrame) {
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rangeProgressFrame);
+ }
+
+ nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
+ if (thumbFrame) {
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, thumbFrame);
+ }
+
+ FinishAndStoreOverflow(&aDesiredSize);
+
+ aStatus = NS_FRAME_COMPLETE;
+
+ NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
+}
+
+void
+nsRangeFrame::ReflowAnonymousContent(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput)
+{
+ // The width/height of our content box, which is the available width/height
+ // for our anonymous content:
+ nscoord rangeFrameContentBoxWidth = aReflowInput.ComputedWidth();
+ nscoord rangeFrameContentBoxHeight = aReflowInput.ComputedHeight();
+ if (rangeFrameContentBoxHeight == NS_AUTOHEIGHT) {
+ rangeFrameContentBoxHeight = 0;
+ }
+
+ nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
+
+ if (trackFrame) { // display:none?
+
+ // Position the track:
+ // The idea here is that we allow content authors to style the width,
+ // height, border and padding of the track, but we ignore margin and
+ // positioning properties and do the positioning ourself to keep the center
+ // of the track's border box on the center of the nsRangeFrame's content
+ // box.
+
+ WritingMode wm = trackFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput trackReflowInput(aPresContext, aReflowInput,
+ trackFrame, availSize);
+
+ // Find the x/y position of the track frame such that it will be positioned
+ // as described above. These coordinates are with respect to the
+ // nsRangeFrame's border-box.
+ nscoord trackX = rangeFrameContentBoxWidth / 2;
+ nscoord trackY = rangeFrameContentBoxHeight / 2;
+
+ // Account for the track's border and padding (we ignore its margin):
+ trackX -= trackReflowInput.ComputedPhysicalBorderPadding().left +
+ trackReflowInput.ComputedWidth() / 2;
+ trackY -= trackReflowInput.ComputedPhysicalBorderPadding().top +
+ trackReflowInput.ComputedHeight() / 2;
+
+ // Make relative to our border box instead of our content box:
+ trackX += aReflowInput.ComputedPhysicalBorderPadding().left;
+ trackY += aReflowInput.ComputedPhysicalBorderPadding().top;
+
+ nsReflowStatus frameStatus;
+ ReflowOutput trackDesiredSize(aReflowInput);
+ ReflowChild(trackFrame, aPresContext, trackDesiredSize,
+ trackReflowInput, trackX, trackY, 0, frameStatus);
+ MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
+ "We gave our child unconstrained height, so it should be complete");
+ FinishReflowChild(trackFrame, aPresContext, trackDesiredSize,
+ &trackReflowInput, trackX, trackY, 0);
+ }
+
+ nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
+
+ if (thumbFrame) { // display:none?
+ WritingMode wm = thumbFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput thumbReflowInput(aPresContext, aReflowInput,
+ thumbFrame, availSize);
+
+ // Where we position the thumb depends on its size, so we first reflow
+ // the thumb at {0,0} to obtain its size, then position it afterwards.
+
+ nsReflowStatus frameStatus;
+ ReflowOutput thumbDesiredSize(aReflowInput);
+ ReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
+ thumbReflowInput, 0, 0, 0, frameStatus);
+ MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
+ "We gave our child unconstrained height, so it should be complete");
+ FinishReflowChild(thumbFrame, aPresContext, thumbDesiredSize,
+ &thumbReflowInput, 0, 0, 0);
+ DoUpdateThumbPosition(thumbFrame, nsSize(aDesiredSize.Width(),
+ aDesiredSize.Height()));
+ }
+
+ nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
+
+ if (rangeProgressFrame) { // display:none?
+ WritingMode wm = rangeProgressFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput progressReflowInput(aPresContext, aReflowInput,
+ rangeProgressFrame, availSize);
+
+ // We first reflow the range-progress frame at {0,0} to obtain its
+ // unadjusted dimensions, then we adjust it to so that the appropriate edge
+ // ends at the thumb.
+
+ nsReflowStatus frameStatus;
+ ReflowOutput progressDesiredSize(aReflowInput);
+ ReflowChild(rangeProgressFrame, aPresContext,
+ progressDesiredSize, progressReflowInput, 0, 0,
+ 0, frameStatus);
+ MOZ_ASSERT(NS_FRAME_IS_FULLY_COMPLETE(frameStatus),
+ "We gave our child unconstrained height, so it should be complete");
+ FinishReflowChild(rangeProgressFrame, aPresContext,
+ progressDesiredSize, &progressReflowInput, 0, 0, 0);
+ DoUpdateRangeProgressFrame(rangeProgressFrame, nsSize(aDesiredSize.Width(),
+ aDesiredSize.Height()));
+ }
+}
+
+#ifdef ACCESSIBILITY
+a11y::AccType
+nsRangeFrame::AccessibleType()
+{
+ return a11y::eHTMLRangeType;
+}
+#endif
+
+double
+nsRangeFrame::GetValueAsFractionOfRange()
+{
+ MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
+ dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
+
+ MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
+
+ Decimal value = input->GetValueAsDecimal();
+ Decimal minimum = input->GetMinimum();
+ Decimal maximum = input->GetMaximum();
+
+ MOZ_ASSERT(value.isFinite() && minimum.isFinite() && maximum.isFinite(),
+ "type=range should have a default maximum/minimum");
+
+ if (maximum <= minimum) {
+ MOZ_ASSERT(value == minimum, "Unsanitized value");
+ return 0.0;
+ }
+
+ MOZ_ASSERT(value >= minimum && value <= maximum, "Unsanitized value");
+
+ return ((value - minimum) / (maximum - minimum)).toDouble();
+}
+
+Decimal
+nsRangeFrame::GetValueAtEventPoint(WidgetGUIEvent* aEvent)
+{
+ MOZ_ASSERT(aEvent->mClass == eMouseEventClass ||
+ aEvent->mClass == eTouchEventClass,
+ "Unexpected event type - aEvent->mRefPoint may be meaningless");
+
+ MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
+ dom::HTMLInputElement* input = static_cast<dom::HTMLInputElement*>(mContent);
+
+ MOZ_ASSERT(input->GetType() == NS_FORM_INPUT_RANGE);
+
+ Decimal minimum = input->GetMinimum();
+ Decimal maximum = input->GetMaximum();
+ MOZ_ASSERT(minimum.isFinite() && maximum.isFinite(),
+ "type=range should have a default maximum/minimum");
+ if (maximum <= minimum) {
+ return minimum;
+ }
+ Decimal range = maximum - minimum;
+
+ LayoutDeviceIntPoint absPoint;
+ if (aEvent->mClass == eTouchEventClass) {
+ MOZ_ASSERT(aEvent->AsTouchEvent()->mTouches.Length() == 1,
+ "Unexpected number of mTouches");
+ absPoint = aEvent->AsTouchEvent()->mTouches[0]->mRefPoint;
+ } else {
+ absPoint = aEvent->mRefPoint;
+ }
+ nsPoint point =
+ nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, absPoint, this);
+
+ if (point == nsPoint(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE)) {
+ // We don't want to change the current value for this error state.
+ return static_cast<dom::HTMLInputElement*>(mContent)->GetValueAsDecimal();
+ }
+
+ nsRect rangeContentRect = GetContentRectRelativeToSelf();
+ nsSize thumbSize;
+
+ if (IsThemed()) {
+ // We need to get the size of the thumb from the theme.
+ nsPresContext *presContext = PresContext();
+ bool notUsedCanOverride;
+ LayoutDeviceIntSize size;
+ presContext->GetTheme()->
+ GetMinimumWidgetSize(presContext, this, NS_THEME_RANGE_THUMB, &size,
+ &notUsedCanOverride);
+ thumbSize.width = presContext->DevPixelsToAppUnits(size.width);
+ thumbSize.height = presContext->DevPixelsToAppUnits(size.height);
+ MOZ_ASSERT(thumbSize.width > 0 && thumbSize.height > 0);
+ } else {
+ nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
+ if (thumbFrame) { // diplay:none?
+ thumbSize = thumbFrame->GetSize();
+ }
+ }
+
+ Decimal fraction;
+ if (IsHorizontal()) {
+ nscoord traversableDistance = rangeContentRect.width - thumbSize.width;
+ if (traversableDistance <= 0) {
+ return minimum;
+ }
+ nscoord posAtStart = rangeContentRect.x + thumbSize.width/2;
+ nscoord posAtEnd = posAtStart + traversableDistance;
+ nscoord posOfPoint = mozilla::clamped(point.x, posAtStart, posAtEnd);
+ fraction = Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
+ if (IsRightToLeft()) {
+ fraction = Decimal(1) - fraction;
+ }
+ } else {
+ nscoord traversableDistance = rangeContentRect.height - thumbSize.height;
+ if (traversableDistance <= 0) {
+ return minimum;
+ }
+ nscoord posAtStart = rangeContentRect.y + thumbSize.height/2;
+ nscoord posAtEnd = posAtStart + traversableDistance;
+ nscoord posOfPoint = mozilla::clamped(point.y, posAtStart, posAtEnd);
+ // For a vertical range, the top (posAtStart) is the highest value, so we
+ // subtract the fraction from 1.0 to get that polarity correct.
+ fraction = Decimal(1) - Decimal(posOfPoint - posAtStart) / Decimal(traversableDistance);
+ }
+
+ MOZ_ASSERT(fraction >= Decimal(0) && fraction <= Decimal(1));
+ return minimum + fraction * range;
+}
+
+void
+nsRangeFrame::UpdateForValueChange()
+{
+ if (NS_SUBTREE_DIRTY(this)) {
+ return; // we're going to be updated when we reflow
+ }
+ nsIFrame* rangeProgressFrame = mProgressDiv->GetPrimaryFrame();
+ nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
+ if (!rangeProgressFrame && !thumbFrame) {
+ return; // diplay:none?
+ }
+ if (rangeProgressFrame) {
+ DoUpdateRangeProgressFrame(rangeProgressFrame, GetSize());
+ }
+ if (thumbFrame) {
+ DoUpdateThumbPosition(thumbFrame, GetSize());
+ }
+ if (IsThemed()) {
+ // We don't know the exact dimensions or location of the thumb when native
+ // theming is applied, so we just repaint the entire range.
+ InvalidateFrame();
+ }
+
+#ifdef ACCESSIBILITY
+ nsAccessibilityService* accService = nsIPresShell::AccService();
+ if (accService) {
+ accService->RangeValueChanged(PresContext()->PresShell(), mContent);
+ }
+#endif
+
+ SchedulePaint();
+}
+
+void
+nsRangeFrame::DoUpdateThumbPosition(nsIFrame* aThumbFrame,
+ const nsSize& aRangeSize)
+{
+ MOZ_ASSERT(aThumbFrame);
+
+ // The idea here is that we want to position the thumb so that the center
+ // of the thumb is on an imaginary line drawn from the middle of one edge
+ // of the range frame's content box to the middle of the opposite edge of
+ // its content box (the opposite edges being the left/right edge if the
+ // range is horizontal, or else the top/bottom edges if the range is
+ // vertical). How far along this line the center of the thumb is placed
+ // depends on the value of the range.
+
+ nsMargin borderAndPadding = GetUsedBorderAndPadding();
+ nsPoint newPosition(borderAndPadding.left, borderAndPadding.top);
+
+ nsSize rangeContentBoxSize(aRangeSize);
+ rangeContentBoxSize.width -= borderAndPadding.LeftRight();
+ rangeContentBoxSize.height -= borderAndPadding.TopBottom();
+
+ nsSize thumbSize = aThumbFrame->GetSize();
+ double fraction = GetValueAsFractionOfRange();
+ MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
+
+ if (IsHorizontal()) {
+ if (thumbSize.width < rangeContentBoxSize.width) {
+ nscoord traversableDistance =
+ rangeContentBoxSize.width - thumbSize.width;
+ if (IsRightToLeft()) {
+ newPosition.x += NSToCoordRound((1.0 - fraction) * traversableDistance);
+ } else {
+ newPosition.x += NSToCoordRound(fraction * traversableDistance);
+ }
+ newPosition.y += (rangeContentBoxSize.height - thumbSize.height)/2;
+ }
+ } else {
+ if (thumbSize.height < rangeContentBoxSize.height) {
+ nscoord traversableDistance =
+ rangeContentBoxSize.height - thumbSize.height;
+ newPosition.x += (rangeContentBoxSize.width - thumbSize.width)/2;
+ newPosition.y += NSToCoordRound((1.0 - fraction) * traversableDistance);
+ }
+ }
+ aThumbFrame->SetPosition(newPosition);
+}
+
+void
+nsRangeFrame::DoUpdateRangeProgressFrame(nsIFrame* aRangeProgressFrame,
+ const nsSize& aRangeSize)
+{
+ MOZ_ASSERT(aRangeProgressFrame);
+
+ // The idea here is that we want to position the ::-moz-range-progress
+ // pseudo-element so that the center line running along its length is on the
+ // corresponding center line of the nsRangeFrame's content box. In the other
+ // dimension, we align the "start" edge of the ::-moz-range-progress
+ // pseudo-element's border-box with the corresponding edge of the
+ // nsRangeFrame's content box, and we size the progress element's border-box
+ // to have a length of GetValueAsFractionOfRange() times the nsRangeFrame's
+ // content-box size.
+
+ nsMargin borderAndPadding = GetUsedBorderAndPadding();
+ nsSize progSize = aRangeProgressFrame->GetSize();
+ nsRect progRect(borderAndPadding.left, borderAndPadding.top,
+ progSize.width, progSize.height);
+
+ nsSize rangeContentBoxSize(aRangeSize);
+ rangeContentBoxSize.width -= borderAndPadding.LeftRight();
+ rangeContentBoxSize.height -= borderAndPadding.TopBottom();
+
+ double fraction = GetValueAsFractionOfRange();
+ MOZ_ASSERT(fraction >= 0.0 && fraction <= 1.0);
+
+ if (IsHorizontal()) {
+ nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.width);
+ if (IsRightToLeft()) {
+ progRect.x += rangeContentBoxSize.width - progLength;
+ }
+ progRect.y += (rangeContentBoxSize.height - progSize.height)/2;
+ progRect.width = progLength;
+ } else {
+ nscoord progLength = NSToCoordRound(fraction * rangeContentBoxSize.height);
+ progRect.x += (rangeContentBoxSize.width - progSize.width)/2;
+ progRect.y += rangeContentBoxSize.height - progLength;
+ progRect.height = progLength;
+ }
+ aRangeProgressFrame->SetRect(progRect);
+}
+
+nsresult
+nsRangeFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ NS_ASSERTION(mTrackDiv, "The track div must exist!");
+ NS_ASSERTION(mThumbDiv, "The thumb div must exist!");
+
+ if (aNameSpaceID == kNameSpaceID_None) {
+ if (aAttribute == nsGkAtoms::value ||
+ aAttribute == nsGkAtoms::min ||
+ aAttribute == nsGkAtoms::max ||
+ aAttribute == nsGkAtoms::step) {
+ // We want to update the position of the thumb, except in one special
+ // case: If the value attribute is being set, it is possible that we are
+ // in the middle of a type change away from type=range, under the
+ // SetAttr(..., nsGkAtoms::value, ...) call in HTMLInputElement::
+ // HandleTypeChange. In that case the HTMLInputElement's type will
+ // already have changed, and if we call UpdateForValueChange()
+ // we'll fail the asserts under that call that check the type of our
+ // HTMLInputElement. Given that we're changing away from being a range
+ // and this frame will shortly be destroyed, there's no point in calling
+ // UpdateForValueChange() anyway.
+ MOZ_ASSERT(mContent->IsHTMLElement(nsGkAtoms::input), "bad cast");
+ bool typeIsRange = static_cast<dom::HTMLInputElement*>(mContent)->GetType() ==
+ NS_FORM_INPUT_RANGE;
+ // If script changed the <input>'s type before setting these attributes
+ // then we don't need to do anything since we are going to be reframed.
+ if (typeIsRange) {
+ UpdateForValueChange();
+ }
+ } else if (aAttribute == nsGkAtoms::orient) {
+ PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eResize,
+ NS_FRAME_IS_DIRTY);
+ }
+ }
+
+ return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
+}
+
+LogicalSize
+nsRangeFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
+ WritingMode aWM,
+ const LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const LogicalSize& aMargin,
+ const LogicalSize& aBorder,
+ const LogicalSize& aPadding,
+ ComputeSizeFlags aFlags)
+{
+ nscoord oneEm = NSToCoordRound(StyleFont()->mFont.size *
+ nsLayoutUtils::FontSizeInflationFor(this)); // 1em
+
+ bool isInlineOriented = IsInlineOriented();
+
+ const WritingMode wm = GetWritingMode();
+ LogicalSize autoSize(wm);
+
+ // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
+ // given too small a size when we're natively themed. If we're themed, we set
+ // our "thickness" dimension to zero below and rely on that
+ // GetMinimumWidgetSize check to correct that dimension to the natural
+ // thickness of a slider in the current theme.
+
+ if (isInlineOriented) {
+ autoSize.ISize(wm) = LONG_SIDE_TO_SHORT_SIDE_RATIO * oneEm;
+ autoSize.BSize(wm) = IsThemed() ? 0 : oneEm;
+ } else {
+ autoSize.ISize(wm) = IsThemed() ? 0 : oneEm;
+ autoSize.BSize(wm) = LONG_SIDE_TO_SHORT_SIDE_RATIO * oneEm;
+ }
+
+ return autoSize.ConvertTo(aWM, wm);
+}
+
+nscoord
+nsRangeFrame::GetMinISize(nsRenderingContext *aRenderingContext)
+{
+ // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
+ // given too small a size when we're natively themed. If we aren't native
+ // themed, we don't mind how small we're sized.
+ return nscoord(0);
+}
+
+nscoord
+nsRangeFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
+{
+ bool isInline = IsInlineOriented();
+
+ if (!isInline && IsThemed()) {
+ // nsFrame::ComputeSize calls GetMinimumWidgetSize to prevent us from being
+ // given too small a size when we're natively themed. We return zero and
+ // depend on that correction to get our "natural" width when we're a
+ // vertical slider.
+ return 0;
+ }
+
+ nscoord prefISize = NSToCoordRound(StyleFont()->mFont.size *
+ nsLayoutUtils::FontSizeInflationFor(this)); // 1em
+
+ if (isInline) {
+ prefISize *= LONG_SIDE_TO_SHORT_SIDE_RATIO;
+ }
+
+ return prefISize;
+}
+
+bool
+nsRangeFrame::IsHorizontal() const
+{
+ dom::HTMLInputElement* element =
+ static_cast<dom::HTMLInputElement*>(mContent);
+ return element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
+ nsGkAtoms::horizontal, eCaseMatters) ||
+ (!element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
+ nsGkAtoms::vertical, eCaseMatters) &&
+ GetWritingMode().IsVertical() ==
+ element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::orient,
+ nsGkAtoms::block, eCaseMatters));
+}
+
+double
+nsRangeFrame::GetMin() const
+{
+ return static_cast<dom::HTMLInputElement*>(mContent)->GetMinimum().toDouble();
+}
+
+double
+nsRangeFrame::GetMax() const
+{
+ return static_cast<dom::HTMLInputElement*>(mContent)->GetMaximum().toDouble();
+}
+
+double
+nsRangeFrame::GetValue() const
+{
+ return static_cast<dom::HTMLInputElement*>(mContent)->GetValueAsDecimal().toDouble();
+}
+
+nsIAtom*
+nsRangeFrame::GetType() const
+{
+ return nsGkAtoms::rangeFrame;
+}
+
+#define STYLES_DISABLING_NATIVE_THEMING \
+ NS_AUTHOR_SPECIFIED_BACKGROUND | \
+ NS_AUTHOR_SPECIFIED_PADDING | \
+ NS_AUTHOR_SPECIFIED_BORDER
+
+bool
+nsRangeFrame::ShouldUseNativeStyle() const
+{
+ nsIFrame* trackFrame = mTrackDiv->GetPrimaryFrame();
+ nsIFrame* progressFrame = mProgressDiv->GetPrimaryFrame();
+ nsIFrame* thumbFrame = mThumbDiv->GetPrimaryFrame();
+
+ return (StyleDisplay()->mAppearance == NS_THEME_RANGE) &&
+ !PresContext()->HasAuthorSpecifiedRules(this,
+ (NS_AUTHOR_SPECIFIED_BORDER |
+ NS_AUTHOR_SPECIFIED_BACKGROUND)) &&
+ trackFrame &&
+ !PresContext()->HasAuthorSpecifiedRules(trackFrame,
+ STYLES_DISABLING_NATIVE_THEMING) &&
+ progressFrame &&
+ !PresContext()->HasAuthorSpecifiedRules(progressFrame,
+ STYLES_DISABLING_NATIVE_THEMING) &&
+ thumbFrame &&
+ !PresContext()->HasAuthorSpecifiedRules(thumbFrame,
+ STYLES_DISABLING_NATIVE_THEMING);
+}
+
+Element*
+nsRangeFrame::GetPseudoElement(CSSPseudoElementType aType)
+{
+ if (aType == CSSPseudoElementType::mozRangeTrack) {
+ return mTrackDiv;
+ }
+
+ if (aType == CSSPseudoElementType::mozRangeThumb) {
+ return mThumbDiv;
+ }
+
+ if (aType == CSSPseudoElementType::mozRangeProgress) {
+ return mProgressDiv;
+ }
+
+ return nsContainerFrame::GetPseudoElement(aType);
+}
+
+nsStyleContext*
+nsRangeFrame::GetAdditionalStyleContext(int32_t aIndex) const
+{
+ // We only implement this so that SetAdditionalStyleContext will be
+ // called if style changes that would change the -moz-focus-outer
+ // pseudo-element have occurred.
+ if (aIndex != 0) {
+ return nullptr;
+ }
+ return mOuterFocusStyle;
+}
+
+void
+nsRangeFrame::SetAdditionalStyleContext(int32_t aIndex,
+ nsStyleContext* aStyleContext)
+{
+ MOZ_ASSERT(aIndex == 0,
+ "GetAdditionalStyleContext is handling other indexes?");
+
+#ifdef DEBUG
+ if (mOuterFocusStyle) {
+ mOuterFocusStyle->FrameRelease();
+ }
+#endif
+
+ // The -moz-focus-outer pseudo-element's style has changed.
+ mOuterFocusStyle = aStyleContext;
+
+#ifdef DEBUG
+ if (mOuterFocusStyle) {
+ mOuterFocusStyle->FrameAddRef();
+ }
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 02:41:05 +0000