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