103 lines
4.3 KiB
C++
103 lines
4.3 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 "nsContainerFrame.h"
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class nsFirstLetterFrame : 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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nsFirstLetterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
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ClassID aClassID)
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: nsContainerFrame(aStyle, aPresContext, aClassID) {}
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nsFirstLetterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: nsContainerFrame(aStyle, aPresContext, kClassID) {}
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) final;
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void Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) final;
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void SetInitialChildList(ChildListID aListID, nsFrameList&& aChildList) final;
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#ifdef DEBUG_FRAME_DUMP
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nsresult GetFrameName(nsAString& aResult) const final;
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#endif
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bool IsFloating() const { return HasAnyStateBits(NS_FRAME_OUT_OF_FLOW); }
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nscoord IntrinsicISize(const mozilla::IntrinsicSizeInput& aInput,
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mozilla::IntrinsicISizeType aType) final;
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void AddInlineMinISize(const mozilla::IntrinsicSizeInput& aInput,
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InlineMinISizeData* aData) final;
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void AddInlinePrefISize(const mozilla::IntrinsicSizeInput& aInput,
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InlinePrefISizeData* aData) final;
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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) final;
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void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
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const ReflowInput& aReflowInput, nsReflowStatus& aStatus) final;
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bool CanContinueTextRun() const final;
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Maybe<nscoord> GetNaturalBaselineBOffset(mozilla::WritingMode aWM,
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BaselineSharingGroup aBaselineGroup,
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BaselineExportContext) const final;
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LogicalSides GetLogicalSkipSides() const final;
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// final of nsFrame method
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nsresult GetChildFrameContainingOffset(int32_t inContentOffset, bool inHint,
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int32_t* outFrameContentOffset,
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nsIFrame** outChildFrame) final;
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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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// Create a new continuation for the first-letter frame (to hold text that
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// is not part of the first-letter range), and move any frames after aFrame
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// to it; if there are none, create a new text continuation there instead.
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// Returns the first text frame of the new continuation.
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nsTextFrame* CreateContinuationForFramesAfter(nsTextFrame* aFrame);
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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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class nsFloatingFirstLetterFrame : public nsFirstLetterFrame {
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(nsFloatingFirstLetterFrame)
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nsFloatingFirstLetterFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: nsFirstLetterFrame(aStyle, aPresContext, kClassID) {}
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};
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#endif /* nsFirstLetterFrame_h__ */
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