forked from mirrors/gecko-dev
127 lines
3.9 KiB
C++
127 lines
3.9 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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#ifndef nsMathMLmencloseFrame_h___
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#define nsMathMLmencloseFrame_h___
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#include "mozilla/Attributes.h"
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#include "mozilla/EnumSet.h"
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#include "nsMathMLContainerFrame.h"
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//
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// <menclose> -- enclose content with a stretching symbol such
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// as a long division sign.
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//
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/*
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The MathML REC describes:
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The menclose element renders its content inside the enclosing notation
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specified by its notation attribute. menclose accepts any number of arguments;
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if this number is not 1, its contents are treated as a single "inferred mrow"
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containing its arguments, as described in Section 3.1.3 Required Arguments.
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*/
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enum nsMencloseNotation
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{
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NOTATION_LONGDIV,
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NOTATION_RADICAL,
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NOTATION_ROUNDEDBOX,
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NOTATION_CIRCLE,
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NOTATION_LEFT,
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NOTATION_RIGHT,
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NOTATION_TOP,
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NOTATION_BOTTOM,
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NOTATION_UPDIAGONALSTRIKE,
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NOTATION_DOWNDIAGONALSTRIKE,
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NOTATION_VERTICALSTRIKE,
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NOTATION_HORIZONTALSTRIKE,
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NOTATION_UPDIAGONALARROW,
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NOTATION_PHASORANGLE
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};
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class nsMathMLmencloseFrame : public nsMathMLContainerFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsMathMLmencloseFrame)
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friend nsIFrame* NS_NewMathMLmencloseFrame(nsIPresShell* aPresShell,
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ComputedStyle* aStyle);
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virtual nsresult
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Place(DrawTarget* aDrawTarget,
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bool aPlaceOrigin,
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ReflowOutput& aDesiredSize) override;
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virtual nsresult
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MeasureForWidth(DrawTarget* aDrawTarget,
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ReflowOutput& aDesiredSize) override;
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virtual nsresult
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AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) override;
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virtual void
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SetAdditionalComputedStyle(int32_t aIndex,
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ComputedStyle* aComputedStyle) override;
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virtual ComputedStyle*
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GetAdditionalComputedStyle(int32_t aIndex) const override;
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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NS_IMETHOD
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InheritAutomaticData(nsIFrame* aParent) override;
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NS_IMETHOD
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TransmitAutomaticData() override;
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virtual nscoord
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FixInterFrameSpacing(ReflowOutput& aDesiredSize) override;
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bool
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IsMrowLike() override {
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return mFrames.FirstChild() != mFrames.LastChild() ||
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!mFrames.FirstChild();
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}
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protected:
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explicit nsMathMLmencloseFrame(ComputedStyle* aStyle, ClassID aID = kClassID);
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virtual ~nsMathMLmencloseFrame();
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nsresult PlaceInternal(DrawTarget* aDrawTarget,
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bool aPlaceOrigin,
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ReflowOutput& aDesiredSize,
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bool aWidthOnly);
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// functions to parse the "notation" attribute.
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nsresult AddNotation(const nsAString& aNotation);
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void InitNotations();
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// Description of the notations to draw
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mozilla::EnumSet<nsMencloseNotation> mNotationsToDraw;
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bool IsToDraw(nsMencloseNotation notation)
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{
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return mNotationsToDraw.contains(notation);
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}
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nscoord mRuleThickness;
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nscoord mRadicalRuleThickness;
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nsTArray<nsMathMLChar> mMathMLChar;
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int8_t mLongDivCharIndex, mRadicalCharIndex;
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nscoord mContentWidth;
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nsresult AllocateMathMLChar(nsMencloseNotation mask);
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// Display a frame of the specified type.
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// @param aType Type of frame to display
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void DisplayNotation(nsDisplayListBuilder* aBuilder,
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nsIFrame* aFrame, const nsRect& aRect,
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const nsDisplayListSet& aLists,
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nscoord aThickness, nsMencloseNotation aType);
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};
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#endif /* nsMathMLmencloseFrame_h___ */
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