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dfac21ba40
The only reasons why we override MeasureForWidth and Reflow in nsMathMLmspaceFrame is to make sure attribute parsing is performed. This patch just uses the implementation of nsMathMLContainerFrame instead, by moving attribute processing into a new nsMathMLmspaceFrame::Place method instead, adding proper caching & invalidation to make it optimal. Differential Revision: https://phabricator.services.mozilla.com/D221623
66 lines
2.0 KiB
C++
66 lines
2.0 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 nsMathMLmspaceFrame_h___
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#define nsMathMLmspaceFrame_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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// <mspace> -- space
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//
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class nsMathMLmspaceFrame final : public nsMathMLContainerFrame {
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsMathMLmspaceFrame)
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friend nsIFrame* NS_NewMathMLmspaceFrame(mozilla::PresShell* aPresShell,
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ComputedStyle* aStyle);
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NS_IMETHOD
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TransmitAutomaticData() override {
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// The REC defines the following elements to be space-like:
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// * an mtext, mspace, maligngroup, or malignmark element;
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mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
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return NS_OK;
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}
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protected:
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explicit nsMathMLmspaceFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: nsMathMLContainerFrame(aStyle, aPresContext, kClassID) {}
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virtual ~nsMathMLmspaceFrame();
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private:
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struct Attribute {
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nsCSSValue mValue;
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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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};
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Attribute mWidth;
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Attribute mHeight;
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Attribute mDepth;
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nsresult AttributeChanged(int32_t aNameSpaceID, nsAtom* aAttribute,
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int32_t aModType) final;
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nscoord CalculateAttributeValue(nsAtom* aAtom, Attribute& aAttribute,
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uint32_t aFlags, float aFontSizeInflation);
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nsresult Place(DrawTarget* aDrawTarget, const PlaceFlags& aFlags,
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ReflowOutput& aDesiredSize) final;
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};
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#endif /* nsMathMLmspaceFrame_h___ */
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