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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /layout/mathml/nsMathMLTokenFrame.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'layout/mathml/nsMathMLTokenFrame.cpp')
-rw-r--r--layout/mathml/nsMathMLTokenFrame.cpp205
1 files changed, 205 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLTokenFrame.cpp b/layout/mathml/nsMathMLTokenFrame.cpp
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+++ b/layout/mathml/nsMathMLTokenFrame.cpp
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+/* -*- 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 "nsMathMLTokenFrame.h"
+#include "nsPresContext.h"
+#include "nsContentUtils.h"
+#include "nsTextFrame.h"
+#include "mozilla/RestyleManager.h"
+#include <algorithm>
+
+using namespace mozilla;
+
+nsIFrame*
+NS_NewMathMLTokenFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
+{
+ return new (aPresShell) nsMathMLTokenFrame(aContext);
+}
+
+NS_IMPL_FRAMEARENA_HELPERS(nsMathMLTokenFrame)
+
+nsMathMLTokenFrame::~nsMathMLTokenFrame()
+{
+}
+
+NS_IMETHODIMP
+nsMathMLTokenFrame::InheritAutomaticData(nsIFrame* aParent)
+{
+ // let the base class get the default from our parent
+ nsMathMLContainerFrame::InheritAutomaticData(aParent);
+
+ return NS_OK;
+}
+
+eMathMLFrameType
+nsMathMLTokenFrame::GetMathMLFrameType()
+{
+ // treat everything other than <mi> as ordinary...
+ if (!mContent->IsMathMLElement(nsGkAtoms::mi_)) {
+ return eMathMLFrameType_Ordinary;
+ }
+
+ uint8_t mathVariant = StyleFont()->mMathVariant;
+ if ((mathVariant == NS_MATHML_MATHVARIANT_NONE &&
+ (StyleFont()->mFont.style == NS_STYLE_FONT_STYLE_ITALIC ||
+ HasAnyStateBits(NS_FRAME_IS_IN_SINGLE_CHAR_MI))) ||
+ mathVariant == NS_MATHML_MATHVARIANT_ITALIC ||
+ mathVariant == NS_MATHML_MATHVARIANT_BOLD_ITALIC ||
+ mathVariant == NS_MATHML_MATHVARIANT_SANS_SERIF_ITALIC ||
+ mathVariant == NS_MATHML_MATHVARIANT_SANS_SERIF_BOLD_ITALIC) {
+ return eMathMLFrameType_ItalicIdentifier;
+ }
+ return eMathMLFrameType_UprightIdentifier;
+}
+
+void
+nsMathMLTokenFrame::MarkTextFramesAsTokenMathML()
+{
+ nsIFrame* child = nullptr;
+ uint32_t childCount = 0;
+
+ // Set flags on child text frames
+ // - to force them to trim their leading and trailing whitespaces.
+ // - Indicate which frames are suitable for mathvariant
+ // - flag single character <mi> frames for special italic treatment
+ for (nsIFrame* childFrame = PrincipalChildList().FirstChild(); childFrame;
+ childFrame = childFrame->GetNextSibling()) {
+ for (nsIFrame* childFrame2 = childFrame->PrincipalChildList().FirstChild();
+ childFrame2; childFrame2 = childFrame2->GetNextSibling()) {
+ if (childFrame2->GetType() == nsGkAtoms::textFrame) {
+ childFrame2->AddStateBits(TEXT_IS_IN_TOKEN_MATHML);
+ child = childFrame2;
+ childCount++;
+ }
+ }
+ }
+ if (mContent->IsMathMLElement(nsGkAtoms::mi_) && childCount == 1) {
+ nsAutoString data;
+ nsContentUtils::GetNodeTextContent(mContent, false, data);
+
+ data.CompressWhitespace();
+ int32_t length = data.Length();
+
+ bool isSingleCharacter = length == 1 ||
+ (length == 2 && NS_IS_HIGH_SURROGATE(data[0]));
+
+ if (isSingleCharacter) {
+ child->AddStateBits(NS_FRAME_IS_IN_SINGLE_CHAR_MI);
+ AddStateBits(NS_FRAME_IS_IN_SINGLE_CHAR_MI);
+ }
+ }
+}
+
+void
+nsMathMLTokenFrame::SetInitialChildList(ChildListID aListID,
+ nsFrameList& aChildList)
+{
+ // First, let the base class do its work
+ nsMathMLContainerFrame::SetInitialChildList(aListID, aChildList);
+ MarkTextFramesAsTokenMathML();
+}
+
+void
+nsMathMLTokenFrame::AppendFrames(ChildListID aListID,
+ nsFrameList& aChildList)
+{
+ nsMathMLContainerFrame::AppendFrames(aListID, aChildList);
+ MarkTextFramesAsTokenMathML();
+}
+
+void
+nsMathMLTokenFrame::InsertFrames(ChildListID aListID,
+ nsIFrame* aPrevFrame,
+ nsFrameList& aChildList)
+{
+ nsMathMLContainerFrame::InsertFrames(aListID, aPrevFrame, aChildList);
+ MarkTextFramesAsTokenMathML();
+}
+
+void
+nsMathMLTokenFrame::Reflow(nsPresContext* aPresContext,
+ ReflowOutput& aDesiredSize,
+ const ReflowInput& aReflowInput,
+ nsReflowStatus& aStatus)
+{
+ MarkInReflow();
+ mPresentationData.flags &= ~NS_MATHML_ERROR;
+
+ // initializations needed for empty markup like <mtag></mtag>
+ aDesiredSize.ClearSize();
+ aDesiredSize.SetBlockStartAscent(0);
+ aDesiredSize.mBoundingMetrics = nsBoundingMetrics();
+
+ for (nsIFrame* childFrame : PrincipalChildList()) {
+ // ask our children to compute their bounding metrics
+ ReflowOutput childDesiredSize(aReflowInput.GetWritingMode(),
+ aDesiredSize.mFlags
+ | NS_REFLOW_CALC_BOUNDING_METRICS);
+ WritingMode wm = childFrame->GetWritingMode();
+ LogicalSize availSize = aReflowInput.ComputedSize(wm);
+ availSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
+ ReflowInput childReflowInput(aPresContext, aReflowInput,
+ childFrame, availSize);
+ ReflowChild(childFrame, aPresContext, childDesiredSize,
+ childReflowInput, aStatus);
+ //NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "bad status");
+ SaveReflowAndBoundingMetricsFor(childFrame, childDesiredSize,
+ childDesiredSize.mBoundingMetrics);
+ }
+
+ // place and size children
+ FinalizeReflow(aReflowInput.mRenderingContext->GetDrawTarget(), aDesiredSize);
+
+ aStatus = NS_FRAME_COMPLETE;
+ NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
+}
+
+// For token elements, mBoundingMetrics is computed at the ReflowToken
+// pass, it is not computed here because our children may be text frames
+// that do not implement the GetBoundingMetrics() interface.
+/* virtual */ nsresult
+nsMathMLTokenFrame::Place(DrawTarget* aDrawTarget,
+ bool aPlaceOrigin,
+ ReflowOutput& aDesiredSize)
+{
+ mBoundingMetrics = nsBoundingMetrics();
+ for (nsIFrame* childFrame :PrincipalChildList()) {
+ ReflowOutput childSize(aDesiredSize.GetWritingMode());
+ GetReflowAndBoundingMetricsFor(childFrame, childSize,
+ childSize.mBoundingMetrics, nullptr);
+ // compute and cache the bounding metrics
+ mBoundingMetrics += childSize.mBoundingMetrics;
+ }
+
+ RefPtr<nsFontMetrics> fm =
+ nsLayoutUtils::GetInflatedFontMetricsForFrame(this);
+ nscoord ascent = fm->MaxAscent();
+ nscoord descent = fm->MaxDescent();
+
+ aDesiredSize.mBoundingMetrics = mBoundingMetrics;
+ aDesiredSize.Width() = mBoundingMetrics.width;
+ aDesiredSize.SetBlockStartAscent(std::max(mBoundingMetrics.ascent, ascent));
+ aDesiredSize.Height() = aDesiredSize.BlockStartAscent() +
+ std::max(mBoundingMetrics.descent, descent);
+
+ if (aPlaceOrigin) {
+ nscoord dy, dx = 0;
+ for (nsIFrame* childFrame : PrincipalChildList()) {
+ ReflowOutput childSize(aDesiredSize.GetWritingMode());
+ GetReflowAndBoundingMetricsFor(childFrame, childSize,
+ childSize.mBoundingMetrics);
+
+ // place and size the child; (dx,0) makes the caret happy - bug 188146
+ dy = childSize.Height() == 0 ? 0 : aDesiredSize.BlockStartAscent() - childSize.BlockStartAscent();
+ FinishReflowChild(childFrame, PresContext(), childSize, nullptr, dx, dy, 0);
+ dx += childSize.Width();
+ }
+ }
+
+ SetReference(nsPoint(0, aDesiredSize.BlockStartAscent()));
+
+ return NS_OK;
+}
+