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Diffstat (limited to 'layout/mathml/nsMathMLmpaddedFrame.h')
-rw-r--r-- | layout/mathml/nsMathMLmpaddedFrame.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/layout/mathml/nsMathMLmpaddedFrame.h b/layout/mathml/nsMathMLmpaddedFrame.h new file mode 100644 index 000000000..ef76a9c7a --- /dev/null +++ b/layout/mathml/nsMathMLmpaddedFrame.h @@ -0,0 +1,93 @@ +/* -*- 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/. */ + +#ifndef nsMathMLmpaddedFrame_h___ +#define nsMathMLmpaddedFrame_h___ + +#include "mozilla/Attributes.h" +#include "nsMathMLContainerFrame.h" + +// +// <mpadded> -- adjust space around content +// + +class nsMathMLmpaddedFrame : public nsMathMLContainerFrame { +public: + NS_DECL_FRAMEARENA_HELPERS + + friend nsIFrame* NS_NewMathMLmpaddedFrame(nsIPresShell* aPresShell, nsStyleContext* aContext); + + NS_IMETHOD + InheritAutomaticData(nsIFrame* aParent) override; + + NS_IMETHOD + TransmitAutomaticData() override { + return TransmitAutomaticDataForMrowLikeElement(); + } + + virtual void + Reflow(nsPresContext* aPresContext, + ReflowOutput& aDesiredSize, + const ReflowInput& aReflowInput, + nsReflowStatus& aStatus) override; + + virtual nsresult + Place(DrawTarget* aDrawTarget, + bool aPlaceOrigin, + ReflowOutput& aDesiredSize) override; + + bool + IsMrowLike() override { + return mFrames.FirstChild() != mFrames.LastChild() || + !mFrames.FirstChild(); + } + +protected: + explicit nsMathMLmpaddedFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {} + virtual ~nsMathMLmpaddedFrame(); + + virtual nsresult + MeasureForWidth(DrawTarget* aDrawTarget, + ReflowOutput& aDesiredSize) override; + +private: + nsCSSValue mWidth; + nsCSSValue mHeight; + nsCSSValue mDepth; + nsCSSValue mLeadingSpace; + nsCSSValue mVerticalOffset; + + int32_t mWidthSign; + int32_t mHeightSign; + int32_t mDepthSign; + int32_t mLeadingSpaceSign; + int32_t mVerticalOffsetSign; + + int32_t mWidthPseudoUnit; + int32_t mHeightPseudoUnit; + int32_t mDepthPseudoUnit; + int32_t mLeadingSpacePseudoUnit; + int32_t mVerticalOffsetPseudoUnit; + + // helpers to process the attributes + void + ProcessAttributes(); + + static bool + ParseAttribute(nsString& aString, + int32_t& aSign, + nsCSSValue& aCSSValue, + int32_t& aPseudoUnit); + + void + UpdateValue(int32_t aSign, + int32_t aPseudoUnit, + const nsCSSValue& aCSSValue, + const ReflowOutput& aDesiredSize, + nscoord& aValueToUpdate, + float aFontSizeInflation) const; +}; + +#endif /* nsMathMLmpaddedFrame_h___ */ |