forked from mirrors/gecko-dev
686 lines
24 KiB
C++
686 lines
24 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxContext.h"
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#include "nsMathMLmfencedFrame.h"
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#include "nsMathMLChar.h"
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#include <algorithm>
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using namespace mozilla;
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using mozilla::gfx::DrawTarget;
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//
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// <mfenced> -- surround content with a pair of fences
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//
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nsIFrame* NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell,
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ComputedStyle* aStyle) {
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return new (aPresShell)
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nsMathMLmfencedFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmfencedFrame)
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void nsMathMLmfencedFrame::DestroyFrom(nsIFrame* aDestructRoot,
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PostDestroyData& aPostDestroyData) {
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RemoveFencesAndSeparators();
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nsMathMLContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
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}
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NS_IMETHODIMP
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nsMathMLmfencedFrame::InheritAutomaticData(nsIFrame* aParent) {
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// let the base class get the default from our parent
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nsMathMLContainerFrame::InheritAutomaticData(aParent);
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mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
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RemoveFencesAndSeparators();
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CreateFencesAndSeparators(PresContext());
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return NS_OK;
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}
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void nsMathMLmfencedFrame::SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList) {
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// First, let the base class do its work
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nsMathMLContainerFrame::SetInitialChildList(aListID, aChildList);
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// InheritAutomaticData will not get called if our parent is not a mathml
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// frame, so initialize NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY for
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// GetPreferredStretchSize() from Reflow().
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mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
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// No need to track the ComputedStyle given to our MathML chars.
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// The Style System will use Get/SetAdditionalComputedStyle() to keep them
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// up-to-date if dynamic changes arise.
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CreateFencesAndSeparators(PresContext());
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}
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nsresult nsMathMLmfencedFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) {
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RemoveFencesAndSeparators();
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CreateFencesAndSeparators(PresContext());
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return nsMathMLContainerFrame::AttributeChanged(aNameSpaceID, aAttribute,
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aModType);
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}
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nsresult nsMathMLmfencedFrame::ChildListChanged(int32_t aModType) {
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RemoveFencesAndSeparators();
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CreateFencesAndSeparators(PresContext());
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return nsMathMLContainerFrame::ChildListChanged(aModType);
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}
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void nsMathMLmfencedFrame::RemoveFencesAndSeparators() {
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MarkNeedsDisplayItemRebuild();
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delete mOpenChar;
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delete mCloseChar;
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if (mSeparatorsChar) delete[] mSeparatorsChar;
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mOpenChar = nullptr;
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mCloseChar = nullptr;
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mSeparatorsChar = nullptr;
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mSeparatorsCount = 0;
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}
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void nsMathMLmfencedFrame::CreateFencesAndSeparators(
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nsPresContext* aPresContext) {
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nsAutoString value;
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//////////////
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// see if the opening fence is there ...
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if (!mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::open,
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value)) {
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value = char16_t('('); // default as per the MathML REC
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} else {
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value.CompressWhitespace();
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}
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if (!value.IsEmpty()) {
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mOpenChar = new nsMathMLChar;
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mOpenChar->SetData(value);
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ResolveMathMLCharStyle(aPresContext, mContent, mComputedStyle, mOpenChar);
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}
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//////////////
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// see if the closing fence is there ...
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if (!mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::close,
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value)) {
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value = char16_t(')'); // default as per the MathML REC
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} else {
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value.CompressWhitespace();
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}
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if (!value.IsEmpty()) {
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mCloseChar = new nsMathMLChar;
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mCloseChar->SetData(value);
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ResolveMathMLCharStyle(aPresContext, mContent, mComputedStyle, mCloseChar);
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}
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//////////////
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// see if separators are there ...
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if (!mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::separators_,
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value)) {
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value = char16_t(','); // default as per the MathML REC
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} else {
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value.StripWhitespace();
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}
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mSeparatorsCount = value.Length();
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if (0 < mSeparatorsCount) {
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int32_t sepCount = mFrames.GetLength() - 1;
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if (0 < sepCount) {
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mSeparatorsChar = new nsMathMLChar[sepCount];
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nsAutoString sepChar;
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for (int32_t i = 0; i < sepCount; i++) {
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if (i < mSeparatorsCount) {
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sepChar = value[i];
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} else {
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sepChar = value[mSeparatorsCount - 1];
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}
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mSeparatorsChar[i].SetData(sepChar);
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ResolveMathMLCharStyle(aPresContext, mContent, mComputedStyle,
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&mSeparatorsChar[i]);
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}
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mSeparatorsCount = sepCount;
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} else {
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// No separators. Note that sepCount can be -1 here, so don't
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// set mSeparatorsCount to it.
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mSeparatorsCount = 0;
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}
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}
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}
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void nsMathMLmfencedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) {
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/////////////
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// display the content
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nsMathMLContainerFrame::BuildDisplayList(aBuilder, aLists);
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////////////
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// display fences and separators
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uint32_t count = 0;
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if (mOpenChar) {
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mOpenChar->Display(aBuilder, this, aLists, count++);
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}
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if (mCloseChar) {
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mCloseChar->Display(aBuilder, this, aLists, count++);
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}
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for (int32_t i = 0; i < mSeparatorsCount; i++) {
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mSeparatorsChar[i].Display(aBuilder, this, aLists, count++);
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}
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}
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/* @param aMetrics is an IN/OUT. Provide the current metrics for the mFenced
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frame and it will be enlarged as necessary.
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For simplicity the width of the container is always incremented by the width
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of the nsMathMLChar. As we only stretch fences and separators in the vertical
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direction, this has no impact on overall appearance.
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*/
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static void ApplyUnstretchedMetrics(nsIFrame* aFrame, DrawTarget* aDrawTarget,
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float aFontSizeInflation,
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nsMathMLChar* aMathMLChar,
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nsBoundingMetrics& aMetrics, bool aIsRTL) {
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if (aMathMLChar && 0 < aMathMLChar->Length()) {
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nsBoundingMetrics charSize;
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aMathMLChar->Stretch(
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aFrame, aDrawTarget, aFontSizeInflation, NS_STRETCH_DIRECTION_DEFAULT,
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aMetrics, // size is unimportant as we aren't stretching
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charSize, NS_STRETCH_NONE, aIsRTL);
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aMetrics += charSize;
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}
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}
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void nsMathMLmfencedFrame::Reflow(nsPresContext* aPresContext,
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ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) {
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MarkInReflow();
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MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
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mPresentationData.flags &= ~NS_MATHML_ERROR;
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aDesiredSize.ClearSize();
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aDesiredSize.SetBlockStartAscent(0);
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aDesiredSize.mBoundingMetrics = nsBoundingMetrics();
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int32_t i;
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const nsStyleFont* font = StyleFont();
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float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
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RefPtr<nsFontMetrics> fm =
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nsLayoutUtils::GetFontMetricsForFrame(this, fontSizeInflation);
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nscoord axisHeight, em;
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GetAxisHeight(aReflowInput.mRenderingContext->GetDrawTarget(), fm,
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axisHeight);
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GetEmHeight(fm, em);
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// leading to be left at the top and the bottom of stretched chars
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nscoord leading = NSToCoordRound(0.2f * em);
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/////////////
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// Reflow children
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// Asking each child to cache its bounding metrics
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// Note that we don't use the base method nsMathMLContainerFrame::Reflow()
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// because we want to stretch our fences, separators and stretchy frames using
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// the *same* initial aDesiredSize.mBoundingMetrics. If we were to use the
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// base method here, our stretchy frames will be stretched and placed, and we
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// may end up stretching our fences/separators with a different aDesiredSize.
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// XXX The above decision was revisited in bug 121748 and this code can be
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// refactored to use nsMathMLContainerFrame::Reflow() at some stage.
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nsReflowStatus childStatus;
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nsIFrame* firstChild = PrincipalChildList().FirstChild();
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nsIFrame* childFrame = firstChild;
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nscoord ascent = 0, descent = 0;
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if (firstChild || mOpenChar || mCloseChar || mSeparatorsCount > 0) {
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// We use the ASCII metrics to get our minimum height. This way,
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// if we have borders or a background, they will fit better with
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// other elements on the line.
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ascent = fm->MaxAscent();
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descent = fm->MaxDescent();
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}
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while (childFrame) {
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ReflowOutput childDesiredSize(aReflowInput);
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WritingMode wm = childFrame->GetWritingMode();
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LogicalSize availSize = aReflowInput.ComputedSize(wm);
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availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
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ReflowInput childReflowInput(aPresContext, aReflowInput, childFrame,
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availSize);
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ReflowChild(childFrame, aPresContext, childDesiredSize, childReflowInput,
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childStatus);
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// NS_ASSERTION(childStatus.IsComplete(), "bad status");
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SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
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childDesiredSize.mBoundingMetrics);
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mozilla::WritingMode outerWM = aReflowInput.GetWritingMode();
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nscoord childDescent =
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childDesiredSize.BSize(outerWM) - childDesiredSize.BlockStartAscent();
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if (descent < childDescent) descent = childDescent;
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if (ascent < childDesiredSize.BlockStartAscent())
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ascent = childDesiredSize.BlockStartAscent();
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childFrame = childFrame->GetNextSibling();
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}
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/////////////
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// Ask stretchy children to stretch themselves
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nsBoundingMetrics containerSize;
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nsStretchDirection stretchDir = NS_STRETCH_DIRECTION_VERTICAL;
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DrawTarget* drawTarget = aReflowInput.mRenderingContext->GetDrawTarget();
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GetPreferredStretchSize(drawTarget, 0, /* i.e., without embellishments */
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stretchDir, containerSize);
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childFrame = firstChild;
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while (childFrame) {
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nsIMathMLFrame* mathmlChild = do_QueryFrame(childFrame);
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if (mathmlChild) {
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ReflowOutput childDesiredSize(aReflowInput);
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// retrieve the metrics that was stored at the previous pass
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GetReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
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childDesiredSize.mBoundingMetrics);
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mathmlChild->Stretch(drawTarget, stretchDir, containerSize,
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childDesiredSize);
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// store the updated metrics
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SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
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childDesiredSize.mBoundingMetrics);
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nscoord childDescent =
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childDesiredSize.Height() - childDesiredSize.BlockStartAscent();
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if (descent < childDescent) descent = childDescent;
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if (ascent < childDesiredSize.BlockStartAscent())
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ascent = childDesiredSize.BlockStartAscent();
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}
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childFrame = childFrame->GetNextSibling();
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}
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// bug 121748: for surrounding fences & separators, use a size that covers
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// everything
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GetPreferredStretchSize(drawTarget, STRETCH_CONSIDER_EMBELLISHMENTS,
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stretchDir, containerSize);
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bool isRTL = StyleVisibility()->mDirection;
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// To achieve a minimum size of "1", the container should be enlarged by the
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// unstretched metrics of the fences and separators.
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ApplyUnstretchedMetrics(this, drawTarget, fontSizeInflation, mOpenChar,
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containerSize, isRTL);
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for (i = 0; i < mSeparatorsCount; i++) {
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ApplyUnstretchedMetrics(this, drawTarget, fontSizeInflation,
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&mSeparatorsChar[i], containerSize, isRTL);
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}
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ApplyUnstretchedMetrics(this, drawTarget, fontSizeInflation, mCloseChar,
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containerSize, isRTL);
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//////////////////////////////////////////
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// Prepare the opening fence, separators, and closing fence, and
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// adjust the origin of children.
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// we need to center around the axis
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nscoord delta = std::max(containerSize.ascent - axisHeight,
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containerSize.descent + axisHeight);
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containerSize.ascent = delta + axisHeight;
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containerSize.descent = delta - axisHeight;
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/////////////////
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// opening fence ...
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ReflowChar(drawTarget, *fm, fontSizeInflation, mOpenChar,
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NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel, axisHeight,
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leading, em, containerSize, ascent, descent, isRTL);
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/////////////////
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// separators ...
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for (i = 0; i < mSeparatorsCount; i++) {
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ReflowChar(drawTarget, *fm, fontSizeInflation, &mSeparatorsChar[i],
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NS_MATHML_OPERATOR_FORM_INFIX, font->mScriptLevel, axisHeight,
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leading, em, containerSize, ascent, descent, isRTL);
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}
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/////////////////
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// closing fence ...
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ReflowChar(drawTarget, *fm, fontSizeInflation, mCloseChar,
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NS_MATHML_OPERATOR_FORM_POSTFIX, font->mScriptLevel, axisHeight,
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leading, em, containerSize, ascent, descent, isRTL);
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//////////////////
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// Adjust the origins of each child.
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// and update our bounding metrics
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i = 0;
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nscoord dx = 0;
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nsBoundingMetrics bm;
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bool firstTime = true;
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nsMathMLChar *leftChar, *rightChar;
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if (isRTL) {
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leftChar = mCloseChar;
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rightChar = mOpenChar;
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} else {
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leftChar = mOpenChar;
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rightChar = mCloseChar;
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}
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if (leftChar) {
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PlaceChar(leftChar, ascent, bm, dx);
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aDesiredSize.mBoundingMetrics = bm;
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firstTime = false;
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}
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if (isRTL) {
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childFrame = this->GetChildList(nsIFrame::kPrincipalList).LastChild();
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} else {
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childFrame = firstChild;
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}
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while (childFrame) {
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ReflowOutput childSize(aReflowInput);
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GetReflowAndBoundingMetricsFor(childFrame, childSize, bm);
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if (firstTime) {
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firstTime = false;
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aDesiredSize.mBoundingMetrics = bm;
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} else
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aDesiredSize.mBoundingMetrics += bm;
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FinishReflowChild(childFrame, aPresContext, childSize, nullptr, dx,
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ascent - childSize.BlockStartAscent(), 0);
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dx += childSize.Width();
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if (i < mSeparatorsCount) {
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PlaceChar(&mSeparatorsChar[isRTL ? mSeparatorsCount - 1 - i : i], ascent,
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bm, dx);
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aDesiredSize.mBoundingMetrics += bm;
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}
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i++;
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if (isRTL) {
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childFrame = childFrame->GetPrevSibling();
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} else {
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childFrame = childFrame->GetNextSibling();
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}
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}
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if (rightChar) {
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PlaceChar(rightChar, ascent, bm, dx);
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if (firstTime)
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aDesiredSize.mBoundingMetrics = bm;
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else
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aDesiredSize.mBoundingMetrics += bm;
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}
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aDesiredSize.Width() = aDesiredSize.mBoundingMetrics.width;
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aDesiredSize.Height() = ascent + descent;
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aDesiredSize.SetBlockStartAscent(ascent);
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SetBoundingMetrics(aDesiredSize.mBoundingMetrics);
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SetReference(nsPoint(0, aDesiredSize.BlockStartAscent()));
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// see if we should fix the spacing
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FixInterFrameSpacing(aDesiredSize);
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// Finished with these:
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ClearSavedChildMetrics();
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// Set our overflow area
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GatherAndStoreOverflow(&aDesiredSize);
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MOZ_ASSERT(aStatus.IsEmpty(), "This type of frame can't be split.");
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
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}
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static void GetCharSpacing(nsMathMLChar* aMathMLChar, nsOperatorFlags aForm,
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int32_t aScriptLevel, nscoord em,
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nscoord& aLeftSpace, nscoord& aRightSpace) {
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nsAutoString data;
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aMathMLChar->GetData(data);
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nsOperatorFlags flags = 0;
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float lspace = 0.0f;
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float rspace = 0.0f;
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bool found =
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nsMathMLOperators::LookupOperator(data, aForm, &flags, &lspace, &rspace);
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// We don't want extra space when we are a script
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if (found && aScriptLevel > 0) {
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lspace /= 2.0f;
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rspace /= 2.0f;
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}
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aLeftSpace = NSToCoordRound(lspace * em);
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aRightSpace = NSToCoordRound(rspace * em);
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}
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// helper functions to perform the common task of formatting our chars
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nsresult nsMathMLmfencedFrame::ReflowChar(
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DrawTarget* aDrawTarget, nsFontMetrics& aFontMetrics,
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float aFontSizeInflation, nsMathMLChar* aMathMLChar, nsOperatorFlags aForm,
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int32_t aScriptLevel, nscoord axisHeight, nscoord leading, nscoord em,
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nsBoundingMetrics& aContainerSize, nscoord& aAscent, nscoord& aDescent,
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bool aRTL) {
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if (aMathMLChar && 0 < aMathMLChar->Length()) {
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nscoord leftSpace;
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nscoord rightSpace;
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GetCharSpacing(aMathMLChar, aForm, aScriptLevel, em, leftSpace, rightSpace);
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// stretch the char to the appropriate height if it is not big enough.
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nsBoundingMetrics charSize;
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nsresult res = aMathMLChar->Stretch(
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this, aDrawTarget, aFontSizeInflation, NS_STRETCH_DIRECTION_VERTICAL,
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aContainerSize, charSize, NS_STRETCH_NORMAL, aRTL);
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if (NS_STRETCH_DIRECTION_UNSUPPORTED !=
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aMathMLChar->GetStretchDirection()) {
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// has changed... so center the char around the axis
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nscoord height = charSize.ascent + charSize.descent;
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charSize.ascent = height / 2 + axisHeight;
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charSize.descent = height - charSize.ascent;
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} else {
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|
// either it hasn't changed or stretching the char failed (i.e.,
|
|
// nsLayoutUtils::AppUnitBoundsOfString failed)
|
|
leading = 0;
|
|
if (NS_FAILED(res)) {
|
|
nsAutoString data;
|
|
aMathMLChar->GetData(data);
|
|
nsBoundingMetrics metrics = nsLayoutUtils::AppUnitBoundsOfString(
|
|
data.get(), data.Length(), aFontMetrics, aDrawTarget);
|
|
charSize.ascent = metrics.ascent;
|
|
charSize.descent = metrics.descent;
|
|
charSize.width = metrics.width;
|
|
// Set this as the bounding metrics of the MathMLChar to leave
|
|
// the necessary room to paint the char.
|
|
aMathMLChar->SetBoundingMetrics(charSize);
|
|
}
|
|
}
|
|
|
|
if (aAscent < charSize.ascent + leading)
|
|
aAscent = charSize.ascent + leading;
|
|
if (aDescent < charSize.descent + leading)
|
|
aDescent = charSize.descent + leading;
|
|
|
|
// account the spacing
|
|
charSize.width += leftSpace + rightSpace;
|
|
|
|
// x-origin is used to store lspace ...
|
|
// y-origin is used to stored the ascent ...
|
|
aMathMLChar->SetRect(nsRect(leftSpace, charSize.ascent, charSize.width,
|
|
charSize.ascent + charSize.descent));
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
/*static*/ void nsMathMLmfencedFrame::PlaceChar(nsMathMLChar* aMathMLChar,
|
|
nscoord aDesiredAscent,
|
|
nsBoundingMetrics& bm,
|
|
nscoord& dx) {
|
|
aMathMLChar->GetBoundingMetrics(bm);
|
|
|
|
// the char's x-origin was used to store lspace ...
|
|
// the char's y-origin was used to store the ascent ...
|
|
// the char's width was used to store the advance with (with spacing) ...
|
|
nsRect rect;
|
|
aMathMLChar->GetRect(rect);
|
|
|
|
nscoord dy = aDesiredAscent - rect.y;
|
|
if (aMathMLChar->GetStretchDirection() != NS_STRETCH_DIRECTION_UNSUPPORTED) {
|
|
// the stretchy char will be centered around the axis
|
|
// so we adjust the returned bounding metrics accordingly
|
|
bm.descent = (bm.ascent + bm.descent) - rect.y;
|
|
bm.ascent = rect.y;
|
|
}
|
|
|
|
aMathMLChar->SetRect(nsRect(dx + rect.x, dy, bm.width, rect.height));
|
|
|
|
bm.leftBearing += rect.x;
|
|
bm.rightBearing += rect.x;
|
|
|
|
// return rect.width since it includes lspace and rspace
|
|
bm.width = rect.width;
|
|
dx += rect.width;
|
|
}
|
|
|
|
static nscoord GetMaxCharWidth(nsIFrame* aFrame, DrawTarget* aDrawTarget,
|
|
float aFontSizeInflation,
|
|
nsMathMLChar* aMathMLChar, nsOperatorFlags aForm,
|
|
int32_t aScriptLevel, nscoord em) {
|
|
nscoord width =
|
|
aMathMLChar->GetMaxWidth(aFrame, aDrawTarget, aFontSizeInflation);
|
|
|
|
if (0 < aMathMLChar->Length()) {
|
|
nscoord leftSpace;
|
|
nscoord rightSpace;
|
|
GetCharSpacing(aMathMLChar, aForm, aScriptLevel, em, leftSpace, rightSpace);
|
|
|
|
width += leftSpace + rightSpace;
|
|
}
|
|
|
|
return width;
|
|
}
|
|
|
|
/* virtual */ void nsMathMLmfencedFrame::GetIntrinsicISizeMetrics(
|
|
gfxContext* aRenderingContext, ReflowOutput& aDesiredSize) {
|
|
nscoord width = 0;
|
|
|
|
const nsStyleFont* font = StyleFont();
|
|
float fontSizeInflation = nsLayoutUtils::FontSizeInflationFor(this);
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, fontSizeInflation);
|
|
nscoord em;
|
|
GetEmHeight(fm, em);
|
|
|
|
if (mOpenChar) {
|
|
width += GetMaxCharWidth(
|
|
this, aRenderingContext->GetDrawTarget(), fontSizeInflation, mOpenChar,
|
|
NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel, em);
|
|
}
|
|
|
|
int32_t i = 0;
|
|
for (nsIFrame* childFrame : PrincipalChildList()) {
|
|
// XXX This includes margin while Reflow currently doesn't consider
|
|
// margin, so we may end up with too much space, but, with stretchy
|
|
// characters, this is an approximation anyway.
|
|
width += nsLayoutUtils::IntrinsicForContainer(aRenderingContext, childFrame,
|
|
nsLayoutUtils::PREF_ISIZE);
|
|
|
|
if (i < mSeparatorsCount) {
|
|
width += GetMaxCharWidth(this, aRenderingContext->GetDrawTarget(),
|
|
fontSizeInflation, &mSeparatorsChar[i],
|
|
NS_MATHML_OPERATOR_FORM_INFIX,
|
|
font->mScriptLevel, em);
|
|
}
|
|
i++;
|
|
}
|
|
|
|
if (mCloseChar) {
|
|
width += GetMaxCharWidth(
|
|
this, aRenderingContext->GetDrawTarget(), fontSizeInflation, mCloseChar,
|
|
NS_MATHML_OPERATOR_FORM_POSTFIX, font->mScriptLevel, em);
|
|
}
|
|
|
|
aDesiredSize.Width() = width;
|
|
aDesiredSize.mBoundingMetrics.width = width;
|
|
aDesiredSize.mBoundingMetrics.leftBearing = 0;
|
|
aDesiredSize.mBoundingMetrics.rightBearing = width;
|
|
}
|
|
|
|
nscoord nsMathMLmfencedFrame::FixInterFrameSpacing(ReflowOutput& aDesiredSize) {
|
|
nscoord gap = nsMathMLContainerFrame::FixInterFrameSpacing(aDesiredSize);
|
|
if (!gap) return 0;
|
|
|
|
nsRect rect;
|
|
if (mOpenChar) {
|
|
mOpenChar->GetRect(rect);
|
|
rect.MoveBy(gap, 0);
|
|
mOpenChar->SetRect(rect);
|
|
}
|
|
if (mCloseChar) {
|
|
mCloseChar->GetRect(rect);
|
|
rect.MoveBy(gap, 0);
|
|
mCloseChar->SetRect(rect);
|
|
}
|
|
for (int32_t i = 0; i < mSeparatorsCount; i++) {
|
|
mSeparatorsChar[i].GetRect(rect);
|
|
rect.MoveBy(gap, 0);
|
|
mSeparatorsChar[i].SetRect(rect);
|
|
}
|
|
return gap;
|
|
}
|
|
|
|
// ----------------------
|
|
// the Style System will use these to pass the proper ComputedStyle to our
|
|
// MathMLChar
|
|
ComputedStyle* nsMathMLmfencedFrame::GetAdditionalComputedStyle(
|
|
int32_t aIndex) const {
|
|
int32_t openIndex = -1;
|
|
int32_t closeIndex = -1;
|
|
int32_t lastIndex = mSeparatorsCount - 1;
|
|
|
|
if (mOpenChar) {
|
|
lastIndex++;
|
|
openIndex = lastIndex;
|
|
}
|
|
if (mCloseChar) {
|
|
lastIndex++;
|
|
closeIndex = lastIndex;
|
|
}
|
|
if (aIndex < 0 || aIndex > lastIndex) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (aIndex < mSeparatorsCount) {
|
|
return mSeparatorsChar[aIndex].GetComputedStyle();
|
|
} else if (aIndex == openIndex) {
|
|
return mOpenChar->GetComputedStyle();
|
|
} else if (aIndex == closeIndex) {
|
|
return mCloseChar->GetComputedStyle();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void nsMathMLmfencedFrame::SetAdditionalComputedStyle(
|
|
int32_t aIndex, ComputedStyle* aComputedStyle) {
|
|
int32_t openIndex = -1;
|
|
int32_t closeIndex = -1;
|
|
int32_t lastIndex = mSeparatorsCount - 1;
|
|
|
|
if (mOpenChar) {
|
|
lastIndex++;
|
|
openIndex = lastIndex;
|
|
}
|
|
if (mCloseChar) {
|
|
lastIndex++;
|
|
closeIndex = lastIndex;
|
|
}
|
|
if (aIndex < 0 || aIndex > lastIndex) {
|
|
return;
|
|
}
|
|
|
|
if (aIndex < mSeparatorsCount) {
|
|
mSeparatorsChar[aIndex].SetComputedStyle(aComputedStyle);
|
|
} else if (aIndex == openIndex) {
|
|
mOpenChar->SetComputedStyle(aComputedStyle);
|
|
} else if (aIndex == closeIndex) {
|
|
mCloseChar->SetComputedStyle(aComputedStyle);
|
|
}
|
|
}
|