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fc5a16c571
This reuses the SVG machinery for calculating unit lengths and leaves vi and vb unimplemented. These units need special handling since they depend on the writing mode, but MathML does not support non-horizontal writing modes yet. See https://bugzilla.mozilla.org/show_bug.cgi?id=1935717. Differential Revision: https://phabricator.services.mozilla.com/D230738
100 lines
2.8 KiB
C++
100 lines
2.8 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 nsMathMLmpaddedFrame_h___
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#define nsMathMLmpaddedFrame_h___
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#include "mozilla/Attributes.h"
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#include "nsCSSValue.h"
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#include "nsMathMLContainerFrame.h"
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namespace mozilla {
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class PresShell;
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} // namespace mozilla
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//
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// <mpadded> -- adjust space around content
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//
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class nsMathMLmpaddedFrame final : public nsMathMLContainerFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsMathMLmpaddedFrame)
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friend nsIFrame* NS_NewMathMLmpaddedFrame(mozilla::PresShell* aPresShell,
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ComputedStyle* aStyle);
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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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return TransmitAutomaticDataForMrowLikeElement();
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}
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nsresult Place(DrawTarget* aDrawTarget, const PlaceFlags& aFlags,
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ReflowOutput& aDesiredSize) override;
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bool IsMrowLike() override {
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return mFrames.FirstChild() != mFrames.LastChild() || !mFrames.FirstChild();
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}
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protected:
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explicit nsMathMLmpaddedFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {}
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virtual ~nsMathMLmpaddedFrame();
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private:
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struct Attribute {
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enum class Sign : uint8_t {
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Unspecified,
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Minus,
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Plus,
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};
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enum class PseudoUnit : uint8_t {
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Unspecified,
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ItSelf,
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Width,
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Height,
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Depth,
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NamedSpace,
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};
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nsCSSValue mValue;
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Sign mSign = Sign::Unspecified;
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PseudoUnit mPseudoUnit = PseudoUnit::Unspecified;
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enum class ParsingState : uint8_t {
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Valid,
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Invalid,
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Dirty,
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};
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ParsingState mState = ParsingState::Dirty;
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void Reset() {
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mValue.Reset();
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mSign = Sign::Unspecified;
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mPseudoUnit = PseudoUnit::Unspecified;
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mState = ParsingState::Dirty;
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}
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bool IsValid() const { return mState == ParsingState::Valid; }
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};
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Attribute mWidth;
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Attribute mHeight;
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Attribute mDepth;
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Attribute mLeadingSpace;
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Attribute mVerticalOffset;
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nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
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int32_t aModType) final;
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void ParseAttribute(nsAtom* aAtom, Attribute& aAttribute);
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bool ParseAttribute(nsString& aString, Attribute& aAttribute);
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void UpdateValue(const Attribute& aAttribute, Attribute::PseudoUnit aSelfUnit,
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const ReflowOutput& aDesiredSize, nscoord& aValueToUpdate,
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float aFontSizeInflation);
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};
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#endif /* nsMathMLmpaddedFrame_h___ */
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