mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
747 lines
25 KiB
C++
747 lines
25 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsMathMLmfencedFrame.h"
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#include "nsRenderingContext.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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//
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// <mfenced> -- surround content with a pair of fences
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//
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nsIFrame*
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NS_NewMathMLmfencedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsMathMLmfencedFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmfencedFrame)
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nsMathMLmfencedFrame::~nsMathMLmfencedFrame()
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{
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RemoveFencesAndSeparators();
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}
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NS_IMETHODIMP
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nsMathMLmfencedFrame::InheritAutomaticData(nsIFrame* aParent)
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{
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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
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nsMathMLmfencedFrame::SetInitialChildList(ChildListID aListID,
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nsFrameList& aChildList)
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{
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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 style contexts given to our MathML chars.
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// The Style System will use Get/SetAdditionalStyleContext() 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
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nsMathMLmfencedFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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RemoveFencesAndSeparators();
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CreateFencesAndSeparators(PresContext());
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return nsMathMLContainerFrame::
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AttributeChanged(aNameSpaceID, aAttribute, aModType);
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}
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nsresult
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nsMathMLmfencedFrame::ChildListChanged(int32_t aModType)
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{
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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
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nsMathMLmfencedFrame::RemoveFencesAndSeparators()
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{
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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
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nsMathMLmfencedFrame::CreateFencesAndSeparators(nsPresContext* aPresContext)
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{
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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->GetAttr(kNameSpaceID_None, nsGkAtoms::open, 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(aPresContext, value);
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ResolveMathMLCharStyle(aPresContext, mContent, mStyleContext, 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->GetAttr(kNameSpaceID_None, nsGkAtoms::close, 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(aPresContext, value);
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ResolveMathMLCharStyle(aPresContext, mContent, mStyleContext, mCloseChar);
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}
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//////////////
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// see if separators are there ...
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if (!mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::separators_, 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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}
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else {
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sepChar = value[mSeparatorsCount-1];
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}
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mSeparatorsChar[i].SetData(aPresContext, sepChar);
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ResolveMathMLCharStyle(aPresContext, mContent, mStyleContext, &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
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nsMathMLmfencedFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists)
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{
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/////////////
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// display the content
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nsMathMLContainerFrame::BuildDisplayList(aBuilder, aDirtyRect, 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
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ApplyUnstretchedMetrics(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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float aFontSizeInflation,
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nsMathMLChar* aMathMLChar,
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nsBoundingMetrics& aMetrics,
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bool aIsRTL)
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{
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if (aMathMLChar && 0 < aMathMLChar->Length()) {
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nsBoundingMetrics charSize;
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aMathMLChar->Stretch(aPresContext, aRenderingContext,
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aFontSizeInflation,
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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
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nsMathMLmfencedFrame::Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus)
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{
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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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nsRefPtr<nsFontMetrics> fm;
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nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
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fontSizeInflation);
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nscoord axisHeight, em;
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GetAxisHeight(*aReflowState.rendContext, fm, 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 base
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// method here, our stretchy frames will be stretched and placed, and we may
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// 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 = GetFirstPrincipalChild();
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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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nsHTMLReflowMetrics childDesiredSize(aReflowState,
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aDesiredSize.mFlags
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| NS_REFLOW_CALC_BOUNDING_METRICS);
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WritingMode wm = childFrame->GetWritingMode();
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LogicalSize availSize = aReflowState.ComputedSize(wm);
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availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
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nsHTMLReflowState childReflowState(aPresContext, aReflowState,
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childFrame, availSize);
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ReflowChild(childFrame, aPresContext, childDesiredSize,
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childReflowState, childStatus);
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//NS_ASSERTION(NS_FRAME_IS_COMPLETE(childStatus), "bad status");
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SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
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childDesiredSize.mBoundingMetrics);
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mozilla::WritingMode outerWM = aReflowState.GetWritingMode();
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nscoord childDescent = childDesiredSize.BSize(outerWM) -
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childDesiredSize.BlockStartAscent();
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if (descent < childDescent)
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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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GetPreferredStretchSize(*aReflowState.rendContext,
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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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nsHTMLReflowMetrics childDesiredSize(aReflowState);
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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(*aReflowState.rendContext,
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stretchDir, containerSize, 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 = childDesiredSize.Height() - childDesiredSize.BlockStartAscent();
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if (descent < childDescent)
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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 everything
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GetPreferredStretchSize(*aReflowState.rendContext,
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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(aPresContext, *aReflowState.rendContext,
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fontSizeInflation, mOpenChar,
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containerSize, isRTL);
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for (i = 0; i < mSeparatorsCount; i++) {
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ApplyUnstretchedMetrics(aPresContext, *aReflowState.rendContext,
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fontSizeInflation, &mSeparatorsChar[i],
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containerSize, isRTL);
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}
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ApplyUnstretchedMetrics(aPresContext, *aReflowState.rendContext,
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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(aPresContext, *aReflowState.rendContext, *fm,
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fontSizeInflation, mOpenChar,
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NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel,
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axisHeight, 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(aPresContext, *aReflowState.rendContext, *fm,
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fontSizeInflation, &mSeparatorsChar[i],
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NS_MATHML_OPERATOR_FORM_INFIX, font->mScriptLevel,
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axisHeight, 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(aPresContext, *aReflowState.rendContext, *fm,
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fontSizeInflation, mCloseChar,
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NS_MATHML_OPERATOR_FORM_POSTFIX, font->mScriptLevel,
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axisHeight, 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->GetLastChild(nsIFrame::kPrincipalList);
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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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nsHTMLReflowMetrics childSize(aReflowState);
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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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}
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else
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aDesiredSize.mBoundingMetrics += bm;
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FinishReflowChild(childFrame, aPresContext, childSize, nullptr,
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dx, 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],
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ascent, 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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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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}
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static void
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GetCharSpacing(nsMathMLChar* aMathMLChar,
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nsOperatorFlags aForm,
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int32_t aScriptLevel,
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nscoord em,
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nscoord& aLeftSpace,
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nscoord& aRightSpace)
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{
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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 = nsMathMLOperators::LookupOperator(data, aForm,
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&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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/*static*/ nsresult
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nsMathMLmfencedFrame::ReflowChar(nsPresContext* aPresContext,
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nsRenderingContext& aRenderingContext,
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nsFontMetrics& aFontMetrics,
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float aFontSizeInflation,
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nsMathMLChar* aMathMLChar,
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nsOperatorFlags aForm,
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int32_t aScriptLevel,
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nscoord axisHeight,
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nscoord leading,
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nscoord em,
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nsBoundingMetrics& aContainerSize,
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nscoord& aAscent,
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nscoord& aDescent,
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bool aRTL)
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|
{
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if (aMathMLChar && 0 < aMathMLChar->Length()) {
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nscoord leftSpace;
|
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nscoord rightSpace;
|
|
GetCharSpacing(aMathMLChar, aForm, aScriptLevel, em, leftSpace, rightSpace);
|
|
|
|
// stretch the char to the appropriate height if it is not big enough.
|
|
nsBoundingMetrics charSize;
|
|
nsresult res = aMathMLChar->Stretch(aPresContext, aRenderingContext,
|
|
aFontSizeInflation,
|
|
NS_STRETCH_DIRECTION_VERTICAL,
|
|
aContainerSize, charSize,
|
|
NS_STRETCH_NORMAL, aRTL);
|
|
|
|
if (NS_STRETCH_DIRECTION_UNSUPPORTED != aMathMLChar->GetStretchDirection()) {
|
|
// has changed... so center the char around the axis
|
|
nscoord height = charSize.ascent + charSize.descent;
|
|
charSize.ascent = height/2 + axisHeight;
|
|
charSize.descent = height - charSize.ascent;
|
|
}
|
|
else {
|
|
// 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, aRenderingContext);
|
|
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(nsPresContext* aPresContext,
|
|
nsRenderingContext* aRenderingContext,
|
|
float aFontSizeInflation,
|
|
nsMathMLChar* aMathMLChar,
|
|
nsOperatorFlags aForm,
|
|
int32_t aScriptLevel,
|
|
nscoord em)
|
|
{
|
|
nscoord width = aMathMLChar->GetMaxWidth(aPresContext, *aRenderingContext,
|
|
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(nsRenderingContext* aRenderingContext, nsHTMLReflowMetrics& aDesiredSize)
|
|
{
|
|
nscoord width = 0;
|
|
|
|
nsPresContext* presContext = PresContext();
|
|
const nsStyleFont* font = StyleFont();
|
|
float fontSizeInflation = nsLayoutUtils:: FontSizeInflationFor(this);
|
|
nsRefPtr<nsFontMetrics> fm;
|
|
nsLayoutUtils::GetFontMetricsForFrame(this, getter_AddRefs(fm),
|
|
fontSizeInflation);
|
|
nscoord em;
|
|
GetEmHeight(fm, em);
|
|
|
|
if (mOpenChar) {
|
|
width +=
|
|
GetMaxCharWidth(presContext, aRenderingContext,
|
|
fontSizeInflation, mOpenChar,
|
|
NS_MATHML_OPERATOR_FORM_PREFIX, font->mScriptLevel, em);
|
|
}
|
|
|
|
int32_t i = 0;
|
|
nsIFrame* childFrame = GetFirstPrincipalChild();
|
|
while (childFrame) {
|
|
// 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(presContext, aRenderingContext,
|
|
fontSizeInflation, &mSeparatorsChar[i],
|
|
NS_MATHML_OPERATOR_FORM_INFIX, font->mScriptLevel, em);
|
|
}
|
|
i++;
|
|
|
|
childFrame = childFrame->GetNextSibling();
|
|
}
|
|
|
|
if (mCloseChar) {
|
|
width +=
|
|
GetMaxCharWidth(presContext, aRenderingContext,
|
|
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(nsHTMLReflowMetrics& 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 style context to our MathMLChar
|
|
nsStyleContext*
|
|
nsMathMLmfencedFrame::GetAdditionalStyleContext(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].GetStyleContext();
|
|
}
|
|
else if (aIndex == openIndex) {
|
|
return mOpenChar->GetStyleContext();
|
|
}
|
|
else if (aIndex == closeIndex) {
|
|
return mCloseChar->GetStyleContext();
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void
|
|
nsMathMLmfencedFrame::SetAdditionalStyleContext(int32_t aIndex,
|
|
nsStyleContext* aStyleContext)
|
|
{
|
|
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].SetStyleContext(aStyleContext);
|
|
}
|
|
else if (aIndex == openIndex) {
|
|
mOpenChar->SetStyleContext(aStyleContext);
|
|
}
|
|
else if (aIndex == closeIndex) {
|
|
mCloseChar->SetStyleContext(aStyleContext);
|
|
}
|
|
}
|