forked from mirrors/gecko-dev
267a479339
Some baseline exports are context-sensitive. One example: In line-layout scenario, the last baseline of a scroll container is always the margin-end. In other (e.g. flex, grid) scenarios, it's the border-box clamped offset to the last line in the container. This enables the required 3 different behaviours for `inline-block` scroll containers for 3 different `baseline-source` values: - `auto`: Last baseline, margin-end - `first`: Border-box clamped offset to the first line - `last`: Border-box clamped offset to the last line Differential Revision: https://phabricator.services.mozilla.com/D173886
93 lines
3.8 KiB
C++
93 lines
3.8 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 nsFirstLetterFrame_h__
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#define nsFirstLetterFrame_h__
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/* rendering object for CSS :first-letter pseudo-element */
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#include "mozilla/Attributes.h"
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#include "nsContainerFrame.h"
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class nsFirstLetterFrame final : public nsContainerFrame {
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsFirstLetterFrame)
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explicit nsFirstLetterFrame(ComputedStyle* aStyle,
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nsPresContext* aPresContext)
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: nsContainerFrame(aStyle, aPresContext, kClassID) {}
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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void SetInitialChildList(ChildListID aListID,
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nsFrameList&& aChildList) override;
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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bool IsFloating() const { return HasAnyStateBits(NS_FRAME_OUT_OF_FLOW); }
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virtual bool IsFrameOfType(uint32_t aFlags) const override {
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if (!IsFloating()) aFlags = aFlags & ~(nsIFrame::eLineParticipant);
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return nsContainerFrame::IsFrameOfType(aFlags &
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~(nsIFrame::eBidiInlineContainer));
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}
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virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
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virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
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virtual void AddInlineMinISize(gfxContext* aRenderingContext,
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InlineMinISizeData* aData) override;
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virtual void AddInlinePrefISize(gfxContext* aRenderingContext,
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InlinePrefISizeData* aData) override;
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SizeComputationResult ComputeSize(
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gfxContext* aRenderingContext, mozilla::WritingMode aWM,
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const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
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const mozilla::LogicalSize& aMargin,
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const mozilla::LogicalSize& aBorderPadding,
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const mozilla::StyleSizeOverrides& aSizeOverrides,
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mozilla::ComputeSizeFlags aFlags) override;
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virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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virtual bool CanContinueTextRun() const override;
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Maybe<nscoord> GetNaturalBaselineBOffset(
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mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup,
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BaselineExportContext) const override;
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virtual LogicalSides GetLogicalSkipSides() const override;
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// override of nsFrame method
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virtual nsresult GetChildFrameContainingOffset(
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int32_t inContentOffset, bool inHint, int32_t* outFrameContentOffset,
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nsIFrame** outChildFrame) override;
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nscoord GetFirstLetterBaseline() const { return mBaseline; }
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// For floating first letter frames, create a continuation for aChild and
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// place it in the correct place. aContinuation is an outparam for the
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// continuation that is created. aIsFluid determines if the continuation is
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// fluid or not.
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void CreateContinuationForFloatingParent(nsIFrame* aChild,
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nsIFrame** aContinuation,
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bool aIsFluid);
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// Whether to use tight glyph bounds for a floating first-letter frame,
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// or "loose" bounds based on font metrics rather than individual glyphs.
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bool UseTightBounds() const;
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protected:
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nscoord mBaseline;
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void DrainOverflowFrames(nsPresContext* aPresContext);
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};
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#endif /* nsFirstLetterFrame_h__ */
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