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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 nsFirstLetterFrame_h__
#define nsFirstLetterFrame_h__
/* rendering object for CSS :first-letter pseudo-element */
#include "mozilla/Attributes.h"
#include "nsContainerFrame.h"
class nsFirstLetterFrame final : public nsContainerFrame {
public:
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS(nsFirstLetterFrame)
explicit nsFirstLetterFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID) {}
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
void SetInitialChildList(ChildListID aListID,
nsFrameList&& aChildList) override;
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override;
#endif
bool IsFloating() const { return HasAnyStateBits(NS_FRAME_OUT_OF_FLOW); }
virtual bool IsFrameOfType(uint32_t aFlags) const override {
if (!IsFloating()) aFlags = aFlags & ~(nsIFrame::eLineParticipant);
return nsContainerFrame::IsFrameOfType(aFlags &
~(nsIFrame::eBidiInlineContainer));
}
virtual nscoord GetMinISize(gfxContext* aRenderingContext) override;
virtual nscoord GetPrefISize(gfxContext* aRenderingContext) override;
virtual void AddInlineMinISize(gfxContext* aRenderingContext,
InlineMinISizeData* aData) override;
virtual void AddInlinePrefISize(gfxContext* aRenderingContext,
InlinePrefISizeData* aData) override;
SizeComputationResult ComputeSize(
gfxContext* aRenderingContext, mozilla::WritingMode aWM,
const mozilla::LogicalSize& aCBSize, nscoord aAvailableISize,
const mozilla::LogicalSize& aMargin,
const mozilla::LogicalSize& aBorderPadding,
const mozilla::StyleSizeOverrides& aSizeOverrides,
mozilla::ComputeSizeFlags aFlags) override;
virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
virtual bool CanContinueTextRun() const override;
Maybe<nscoord> GetNaturalBaselineBOffset(
mozilla::WritingMode aWM, BaselineSharingGroup aBaselineGroup,
BaselineExportContext) const override;
virtual LogicalSides GetLogicalSkipSides() const override;
// override of nsFrame method
virtual nsresult GetChildFrameContainingOffset(
int32_t inContentOffset, bool inHint, int32_t* outFrameContentOffset,
nsIFrame** outChildFrame) override;
nscoord GetFirstLetterBaseline() const { return mBaseline; }
// For floating first letter frames, create a continuation for aChild and
// place it in the correct place. aContinuation is an outparam for the
// continuation that is created. aIsFluid determines if the continuation is
// fluid or not.
void CreateContinuationForFloatingParent(nsIFrame* aChild,
nsIFrame** aContinuation,
bool aIsFluid);
// Whether to use tight glyph bounds for a floating first-letter frame,
// or "loose" bounds based on font metrics rather than individual glyphs.
bool UseTightBounds() const;
protected:
nscoord mBaseline;
void DrainOverflowFrames(nsPresContext* aPresContext);
};
#endif /* nsFirstLetterFrame_h__ */
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