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-rw-r--r--layout/forms/nsMeterFrame.cpp297
1 files changed, 297 insertions, 0 deletions
diff --git a/layout/forms/nsMeterFrame.cpp b/layout/forms/nsMeterFrame.cpp
new file mode 100644
index 000000000..1f3bd8022
--- /dev/null
+++ b/layout/forms/nsMeterFrame.cpp
@@ -0,0 +1,297 @@
+/* -*- 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 "nsMeterFrame.h"
+
+#include "nsIContent.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsNameSpaceManager.h"
+#include "nsIDocument.h"
+#include "nsIPresShell.h"
+#include "nsNodeInfoManager.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsContentUtils.h"
+#include "nsFormControlFrame.h"
+#include "nsFontMetrics.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/HTMLMeterElement.h"
+#include "nsContentList.h"
+#include "nsCSSPseudoElements.h"
+#include "nsStyleSet.h"
+#include "mozilla/StyleSetHandle.h"
+#include "mozilla/StyleSetHandleInlines.h"
+#include "nsThemeConstants.h"
+#include <algorithm>
+
+using namespace mozilla;
+using mozilla::dom::Element;
+using mozilla::dom::HTMLMeterElement;
+
+nsIFrame*
+NS_NewMeterFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsMeterFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMeterFrame)
+
+nsMeterFrame::nsMeterFrame(nsStyleContext* aContext)
+ : nsContainerFrame(aContext)
+ , mBarDiv(nullptr)
+{
+}
+
+nsMeterFrame::~nsMeterFrame()
+{
+}
+
+void
+nsMeterFrame::DestroyFrom(nsIFrame* aDestructRoot)
+{
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsMeterFrame should not have continuations; if it does we "
+ "need to call RegUnregAccessKey only for the first.");
+ nsFormControlFrame::RegUnRegAccessKey(static_cast<nsIFrame*>(this), false);
+ nsContentUtils::DestroyAnonymousContent(&mBarDiv);
+ nsContainerFrame::DestroyFrom(aDestructRoot);
+}
+
+nsIAtom*
+nsMeterFrame::GetType() const
+{
+ return nsGkAtoms::meterFrame;
+}
+
+nsresult
+nsMeterFrame::CreateAnonymousContent(nsTArray<ContentInfo>& aElements)
+{
+ // Get the NodeInfoManager and tag necessary to create the meter bar div.
+ nsCOMPtr<nsIDocument> doc = mContent->GetComposedDoc();
+
+ // Create the div.
+ mBarDiv = doc->CreateHTMLElement(nsGkAtoms::div);
+
+ // Associate ::-moz-meter-bar pseudo-element to the anonymous child.
+ CSSPseudoElementType pseudoType = CSSPseudoElementType::mozMeterBar;
+ RefPtr<nsStyleContext> newStyleContext = PresContext()->StyleSet()->
+ ResolvePseudoElementStyle(mContent->AsElement(), pseudoType,
+ StyleContext(), mBarDiv->AsElement());
+
+ if (!aElements.AppendElement(ContentInfo(mBarDiv, newStyleContext))) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ return NS_OK;
+}
+
+void
+nsMeterFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
+ uint32_t aFilter)
+{
+ if (mBarDiv) {
+ aElements.AppendElement(mBarDiv);
+ }
+}
+
+NS_QUERYFRAME_HEAD(nsMeterFrame)
+ NS_QUERYFRAME_ENTRY(nsMeterFrame)
+ NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
+NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
+
+
+void
+nsMeterFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus)
+{
+ MarkInReflow();
+ DO_GLOBAL_REFLOW_COUNT("nsMeterFrame");
+ DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
+
+ NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
+ NS_ASSERTION(!GetPrevContinuation(),
+ "nsMeterFrame 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);
+ }
+
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+ NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
+
+ ReflowBarFrame(barFrame, aPresContext, aReflowInput, aStatus);
+
+ aDesiredSize.SetSize(aReflowInput.GetWritingMode(),
+ aReflowInput.ComputedSizeWithBorderPadding());
+
+ aDesiredSize.SetOverflowAreasToDesiredBounds();
+ ConsiderChildOverflow(aDesiredSize.mOverflowAreas, barFrame);
+ FinishAndStoreOverflow(&aDesiredSize);
+
+ aStatus = NS_FRAME_COMPLETE;
+
+ NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
+}
+
+void
+nsMeterFrame::ReflowBarFrame(nsIFrame* aBarFrame,
+ nsPresContext* aPresContext,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus)
+{
+ bool vertical = ResolvedOrientationIsVertical();
+ WritingMode wm = aBarFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput reflowInput(aPresContext, aReflowInput,
+ aBarFrame, availSize);
+ nscoord size = vertical ? aReflowInput.ComputedHeight()
+ : aReflowInput.ComputedWidth();
+ nscoord xoffset = aReflowInput.ComputedPhysicalBorderPadding().left;
+ nscoord yoffset = aReflowInput.ComputedPhysicalBorderPadding().top;
+
+ // NOTE: Introduce a new function getPosition in the content part ?
+ HTMLMeterElement* meterElement = static_cast<HTMLMeterElement*>(mContent);
+
+ double max = meterElement->Max();
+ double min = meterElement->Min();
+ double value = meterElement->Value();
+
+ double position = max - min;
+ position = position != 0 ? (value - min) / position : 1;
+
+ size = NSToCoordRound(size * position);
+
+ if (!vertical && (wm.IsVertical() ? wm.IsVerticalRL() : !wm.IsBidiLTR())) {
+ xoffset += aReflowInput.ComputedWidth() - size;
+ }
+
+ // The bar position is *always* constrained.
+ if (vertical) {
+ // We want the bar to begin at the bottom.
+ yoffset += aReflowInput.ComputedHeight() - size;
+
+ size -= reflowInput.ComputedPhysicalMargin().TopBottom() +
+ reflowInput.ComputedPhysicalBorderPadding().TopBottom();
+ size = std::max(size, 0);
+ reflowInput.SetComputedHeight(size);
+ } else {
+ size -= reflowInput.ComputedPhysicalMargin().LeftRight() +
+ reflowInput.ComputedPhysicalBorderPadding().LeftRight();
+ size = std::max(size, 0);
+ reflowInput.SetComputedWidth(size);
+ }
+
+ xoffset += reflowInput.ComputedPhysicalMargin().left;
+ yoffset += reflowInput.ComputedPhysicalMargin().top;
+
+ ReflowOutput barDesiredSize(reflowInput);
+ ReflowChild(aBarFrame, aPresContext, barDesiredSize, reflowInput, xoffset,
+ yoffset, 0, aStatus);
+ FinishReflowChild(aBarFrame, aPresContext, barDesiredSize, &reflowInput,
+ xoffset, yoffset, 0);
+}
+
+nsresult
+nsMeterFrame::AttributeChanged(int32_t aNameSpaceID,
+ nsIAtom* aAttribute,
+ int32_t aModType)
+{
+ NS_ASSERTION(mBarDiv, "Meter bar div must exist!");
+
+ if (aNameSpaceID == kNameSpaceID_None &&
+ (aAttribute == nsGkAtoms::value ||
+ aAttribute == nsGkAtoms::max ||
+ aAttribute == nsGkAtoms::min )) {
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+ NS_ASSERTION(barFrame, "The meter frame should have a child with a frame!");
+ PresContext()->PresShell()->FrameNeedsReflow(barFrame,
+ nsIPresShell::eResize,
+ NS_FRAME_IS_DIRTY);
+ InvalidateFrame();
+ }
+
+ return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
+ aModType);
+}
+
+LogicalSize
+nsMeterFrame::ComputeAutoSize(nsRenderingContext* aRenderingContext,
+ WritingMode aWM,
+ const LogicalSize& aCBSize,
+ nscoord aAvailableISize,
+ const LogicalSize& aMargin,
+ const LogicalSize& aBorder,
+ const LogicalSize& aPadding,
+ ComputeSizeFlags aFlags)
+{
+ RefPtr<nsFontMetrics> fontMet =
+ nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
+
+ const WritingMode wm = GetWritingMode();
+ LogicalSize autoSize(wm);
+ autoSize.BSize(wm) = autoSize.ISize(wm) = fontMet->Font().size; // 1em
+
+ if (ResolvedOrientationIsVertical() == wm.IsVertical()) {
+ autoSize.ISize(wm) *= 5; // 5em
+ } else {
+ autoSize.BSize(wm) *= 5; // 5em
+ }
+
+ return autoSize.ConvertTo(aWM, wm);
+}
+
+nscoord
+nsMeterFrame::GetMinISize(nsRenderingContext *aRenderingContext)
+{
+ RefPtr<nsFontMetrics> fontMet =
+ nsLayoutUtils::GetFontMetricsForFrame(this, 1.0f);
+
+ nscoord minISize = fontMet->Font().size; // 1em
+
+ if (ResolvedOrientationIsVertical() == GetWritingMode().IsVertical()) {
+ // The orientation is inline
+ minISize *= 5; // 5em
+ }
+
+ return minISize;
+}
+
+nscoord
+nsMeterFrame::GetPrefISize(nsRenderingContext *aRenderingContext)
+{
+ return GetMinISize(aRenderingContext);
+}
+
+bool
+nsMeterFrame::ShouldUseNativeStyle() const
+{
+ nsIFrame* barFrame = mBarDiv->GetPrimaryFrame();
+
+ // Use the native style if these conditions are satisfied:
+ // - both frames use the native appearance;
+ // - neither frame has author specified rules setting the border or the
+ // background.
+ return StyleDisplay()->mAppearance == NS_THEME_METERBAR &&
+ !PresContext()->HasAuthorSpecifiedRules(this,
+ NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND) &&
+ barFrame &&
+ barFrame->StyleDisplay()->mAppearance == NS_THEME_METERCHUNK &&
+ !PresContext()->HasAuthorSpecifiedRules(barFrame,
+ NS_AUTHOR_SPECIFIED_BORDER | NS_AUTHOR_SPECIFIED_BACKGROUND);
+}
+
+Element*
+nsMeterFrame::GetPseudoElement(CSSPseudoElementType aType)
+{
+ if (aType == CSSPseudoElementType::mozMeterBar) {
+ return mBarDiv;
+ }
+
+ return nsContainerFrame::GetPseudoElement(aType);
+}
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