зеркало из https://github.com/mozilla/gecko-dev.git
706 строки
29 KiB
C++
706 строки
29 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 nsTextFrame_h__
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#define nsTextFrame_h__
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#include "mozilla/Attributes.h"
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#include "nsFrame.h"
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#include "nsSplittableFrame.h"
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#include "nsLineBox.h"
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#include "gfxFont.h"
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#include "gfxSkipChars.h"
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#include "gfxContext.h"
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#include "nsDisplayList.h"
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class nsTextPaintStyle;
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class PropertyProvider;
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// This state bit is set on frames that have some non-collapsed characters after
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// reflow
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#define TEXT_HAS_NONCOLLAPSED_CHARACTERS NS_FRAME_STATE_BIT(31)
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// This state bit is set on frames which are forced to trim their leading and
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// trailing whitespaces
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#define TEXT_FORCE_TRIM_WHITESPACE NS_FRAME_STATE_BIT(32)
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#define TEXT_HAS_FONT_INFLATION NS_FRAME_STATE_BIT(61)
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typedef nsFrame nsTextFrameBase;
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class nsDisplayTextGeometry;
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class nsDisplayText;
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class nsTextFrame : public nsTextFrameBase {
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public:
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NS_DECL_QUERYFRAME_TARGET(nsTextFrame)
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NS_DECL_FRAMEARENA_HELPERS
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friend class nsContinuingTextFrame;
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friend class nsDisplayTextGeometry;
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friend class nsDisplayText;
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nsTextFrame(nsStyleContext* aContext)
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: nsTextFrameBase(aContext)
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{
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NS_ASSERTION(mContentOffset == 0, "Bogus content offset");
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}
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// nsQueryFrame
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NS_DECL_QUERYFRAME
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// nsIFrame
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists) MOZ_OVERRIDE;
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virtual void Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
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virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
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NS_IMETHOD GetCursor(const nsPoint& aPoint,
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nsIFrame::Cursor& aCursor) MOZ_OVERRIDE;
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NS_IMETHOD CharacterDataChanged(CharacterDataChangeInfo* aInfo) MOZ_OVERRIDE;
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
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virtual nsIFrame* GetNextContinuation() const MOZ_OVERRIDE {
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return mNextContinuation;
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}
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NS_IMETHOD SetNextContinuation(nsIFrame* aNextContinuation) MOZ_OVERRIDE {
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NS_ASSERTION (!aNextContinuation || GetType() == aNextContinuation->GetType(),
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"setting a next continuation with incorrect type!");
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NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextContinuation, this),
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"creating a loop in continuation chain!");
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mNextContinuation = aNextContinuation;
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if (aNextContinuation)
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aNextContinuation->RemoveStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
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return NS_OK;
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}
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virtual nsIFrame* GetNextInFlowVirtual() const MOZ_OVERRIDE { return GetNextInFlow(); }
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nsIFrame* GetNextInFlow() const {
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return mNextContinuation && (mNextContinuation->GetStateBits() & NS_FRAME_IS_FLUID_CONTINUATION) ?
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mNextContinuation : nullptr;
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}
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NS_IMETHOD SetNextInFlow(nsIFrame* aNextInFlow) MOZ_OVERRIDE {
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NS_ASSERTION (!aNextInFlow || GetType() == aNextInFlow->GetType(),
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"setting a next in flow with incorrect type!");
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NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextInFlow, this),
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"creating a loop in continuation chain!");
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mNextContinuation = aNextInFlow;
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if (aNextInFlow)
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aNextInFlow->AddStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
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return NS_OK;
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}
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virtual nsIFrame* GetLastInFlow() const MOZ_OVERRIDE;
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virtual nsIFrame* GetLastContinuation() const MOZ_OVERRIDE;
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virtual nsSplittableType GetSplittableType() const MOZ_OVERRIDE {
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return NS_FRAME_SPLITTABLE;
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}
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/**
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* Get the "type" of the frame
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*
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* @see nsGkAtoms::textFrame
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*/
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virtual nsIAtom* GetType() const MOZ_OVERRIDE;
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virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
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{
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// Set the frame state bit for text frames to mark them as replaced.
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// XXX kipp: temporary
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return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced |
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nsIFrame::eLineParticipant));
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}
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virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
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virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
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#ifdef DEBUG
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void List(FILE* out, int32_t aIndent, uint32_t aFlags = 0) const MOZ_OVERRIDE;
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NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
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NS_IMETHOD_(nsFrameState) GetDebugStateBits() const MOZ_OVERRIDE;
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#endif
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virtual ContentOffsets CalcContentOffsetsFromFramePoint(nsPoint aPoint) MOZ_OVERRIDE;
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ContentOffsets GetCharacterOffsetAtFramePoint(const nsPoint &aPoint);
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/**
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* This is called only on the primary text frame. It indicates that
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* the selection state of the given character range has changed.
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* Text in the range is unconditionally invalidated
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* (Selection::Repaint depends on this).
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* @param aSelected true if the selection has been added to the range,
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* false otherwise
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* @param aType the type of selection added or removed
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*/
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void SetSelectedRange(uint32_t aStart, uint32_t aEnd, bool aSelected,
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SelectionType aType);
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virtual bool PeekOffsetNoAmount(bool aForward, int32_t* aOffset) MOZ_OVERRIDE;
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virtual bool PeekOffsetCharacter(bool aForward, int32_t* aOffset,
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bool aRespectClusters = true) MOZ_OVERRIDE;
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virtual bool PeekOffsetWord(bool aForward, bool aWordSelectEatSpace, bool aIsKeyboardSelect,
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int32_t* aOffset, PeekWordState* aState) MOZ_OVERRIDE;
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NS_IMETHOD CheckVisibility(nsPresContext* aContext, int32_t aStartIndex, int32_t aEndIndex, bool aRecurse, bool *aFinished, bool *_retval) MOZ_OVERRIDE;
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// Flags for aSetLengthFlags
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enum { ALLOW_FRAME_CREATION_AND_DESTRUCTION = 0x01 };
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// Update offsets to account for new length. This may clear mTextRun.
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void SetLength(int32_t aLength, nsLineLayout* aLineLayout,
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uint32_t aSetLengthFlags = 0);
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NS_IMETHOD GetOffsets(int32_t &start, int32_t &end)const MOZ_OVERRIDE;
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virtual void AdjustOffsetsForBidi(int32_t start, int32_t end) MOZ_OVERRIDE;
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NS_IMETHOD GetPointFromOffset(int32_t inOffset,
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nsPoint* outPoint) MOZ_OVERRIDE;
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NS_IMETHOD GetChildFrameContainingOffset(int32_t inContentOffset,
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bool inHint,
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int32_t* outFrameContentOffset,
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nsIFrame* *outChildFrame) MOZ_OVERRIDE;
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virtual bool IsVisibleInSelection(nsISelection* aSelection) MOZ_OVERRIDE;
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virtual bool IsEmpty() MOZ_OVERRIDE;
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virtual bool IsSelfEmpty() MOZ_OVERRIDE { return IsEmpty(); }
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virtual nscoord GetBaseline() const MOZ_OVERRIDE;
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/**
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* @return true if this text frame ends with a newline character. It
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* should return false if this is not a text frame.
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*/
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virtual bool HasTerminalNewline() const MOZ_OVERRIDE;
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/**
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* Returns true if this text frame is logically adjacent to the end of the
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* line.
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*/
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bool IsAtEndOfLine() const;
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/**
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* Call this only after reflow the frame. Returns true if non-collapsed
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* characters are present.
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*/
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bool HasNoncollapsedCharacters() const {
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return (GetStateBits() & TEXT_HAS_NONCOLLAPSED_CHARACTERS) != 0;
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}
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#ifdef ACCESSIBILITY
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virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
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#endif
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float GetFontSizeInflation() const;
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bool IsCurrentFontInflation(float aInflation) const;
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bool HasFontSizeInflation() const {
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return (GetStateBits() & TEXT_HAS_FONT_INFLATION) != 0;
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}
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void SetFontSizeInflation(float aInflation);
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virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
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virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
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InlineMinWidthData *aData) MOZ_OVERRIDE;
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virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
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InlinePrefWidthData *aData) MOZ_OVERRIDE;
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virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder, nsSize aPadding,
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uint32_t aFlags) MOZ_OVERRIDE;
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virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aMetrics,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus) MOZ_OVERRIDE;
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virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
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// Method that is called for a text frame that is logically
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// adjacent to the end of the line (i.e. followed only by empty text frames,
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// placeholders or inlines containing such).
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struct TrimOutput {
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// true if we trimmed some space or changed metrics in some other way.
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// In this case, we should call RecomputeOverflow on this frame.
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bool mChanged;
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// true if the last character is not justifiable so should be subtracted
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// from the count of justifiable characters in the frame, since the last
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// character in a line is not justifiable.
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bool mLastCharIsJustifiable;
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// an amount to *subtract* from the frame's width (zero if !mChanged)
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nscoord mDeltaWidth;
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};
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TrimOutput TrimTrailingWhiteSpace(nsRenderingContext* aRC);
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virtual nsresult GetRenderedText(nsAString* aString = nullptr,
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gfxSkipChars* aSkipChars = nullptr,
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gfxSkipCharsIterator* aSkipIter = nullptr,
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uint32_t aSkippedStartOffset = 0,
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uint32_t aSkippedMaxLength = UINT32_MAX) MOZ_OVERRIDE;
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nsOverflowAreas
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RecomputeOverflow(const nsHTMLReflowState& aBlockReflowState);
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enum TextRunType {
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// Anything in reflow (but not intrinsic width calculation) or
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// painting should use the inflated text run (i.e., with font size
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// inflation applied).
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eInflated,
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// Intrinsic width calculation should use the non-inflated text run.
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// When there is font size inflation, it will be different.
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eNotInflated
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};
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void AddInlineMinWidthForFlow(nsRenderingContext *aRenderingContext,
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nsIFrame::InlineMinWidthData *aData,
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TextRunType aTextRunType);
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void AddInlinePrefWidthForFlow(nsRenderingContext *aRenderingContext,
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InlinePrefWidthData *aData,
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TextRunType aTextRunType);
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/**
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* Calculate the horizontal bounds of the grapheme clusters that fit entirely
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* inside the given left/right edges (which are positive lengths from the
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* respective frame edge). If an input value is zero it is ignored and the
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* result for that edge is zero. All out parameter values are undefined when
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* the method returns false.
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* @return true if at least one whole grapheme cluster fit between the edges
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*/
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bool MeasureCharClippedText(nscoord aLeftEdge, nscoord aRightEdge,
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nscoord* aSnappedLeftEdge,
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nscoord* aSnappedRightEdge);
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/**
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* Same as above; this method also the returns the corresponding text run
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* offset and number of characters that fit. All out parameter values are
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* undefined when the method returns false.
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* @return true if at least one whole grapheme cluster fit between the edges
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*/
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bool MeasureCharClippedText(PropertyProvider& aProvider,
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nscoord aLeftEdge, nscoord aRightEdge,
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uint32_t* aStartOffset, uint32_t* aMaxLength,
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nscoord* aSnappedLeftEdge,
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nscoord* aSnappedRightEdge);
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/**
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* Object with various callbacks for PaintText() to invoke for different parts
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* of the frame's text rendering, when we're generating paths rather than
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* painting.
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*
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* Callbacks are invoked in the following order:
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*
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* (NotifyBeforeSelectionBackground NotifySelectionBackgroundPathEmitted)?
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* (NotifyBeforeDecorationLine NotifyDecorationLinePathEmitted)*
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* NotifyBeforeText
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* (NotifyGlyphPathEmitted |
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* (NotifyBeforeSVGGlyphPainted NotifyAfterSVGGlyphPainted))*
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* NotifyAfterText
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* (NotifyBeforeDecorationLine NotifyDecorationLinePathEmitted)*
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* (NotifyBeforeSelectionDecorationLine NotifySelectionDecorationLinePathEmitted)*
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*
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* The color of each part of the frame's text rendering is passed as an argument
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* to the NotifyBefore* callback for that part. The nscolor can take on one of
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* the three selection special colors defined in LookAndFeel.h --
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* NS_TRANSPARENT, NS_SAME_AS_FOREGROUND_COLOR and
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* NS_40PERCENT_FOREGROUND_COLOR.
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*/
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struct DrawPathCallbacks : gfxTextRunDrawCallbacks
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{
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/**
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* @param aShouldPaintSVGGlyphs Whether SVG glyphs should be painted.
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*/
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DrawPathCallbacks(bool aShouldPaintSVGGlyphs = false)
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: gfxTextRunDrawCallbacks(aShouldPaintSVGGlyphs)
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{
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}
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/**
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* Called just before any paths have been emitted to the gfxContext
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* for the glyphs of the frame's text.
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*/
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virtual void NotifyBeforeText(nscolor aColor) { }
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/**
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* Called just after all the paths have been emitted to the gfxContext
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* for the glyphs of the frame's text.
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*/
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virtual void NotifyAfterText() { }
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/**
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* Called just before a path corresponding to the selection background
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* has been emitted to the gfxContext.
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*/
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virtual void NotifyBeforeSelectionBackground(nscolor aColor) { }
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/**
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* Called just after a path corresponding to the selection background
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* has been emitted to the gfxContext.
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*/
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virtual void NotifySelectionBackgroundPathEmitted() { }
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/**
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* Called just before a path corresponding to a text decoration line
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* has been emitted to the gfxContext.
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*/
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virtual void NotifyBeforeDecorationLine(nscolor aColor) { }
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/**
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* Called just after a path corresponding to a text decoration line
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* has been emitted to the gfxContext.
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*/
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virtual void NotifyDecorationLinePathEmitted() { }
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/**
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* Called just before a path corresponding to a selection decoration line
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* has been emitted to the gfxContext.
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*/
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virtual void NotifyBeforeSelectionDecorationLine(nscolor aColor) { }
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/**
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* Called just after a path corresponding to a selection decoration line
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* has been emitted to the gfxContext.
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*/
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virtual void NotifySelectionDecorationLinePathEmitted() { }
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};
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// Primary frame paint method called from nsDisplayText. Can also be used
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// to generate paths rather than paint the frame's text by passing a callback
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// object. The private DrawText() is what applies the text to a graphics
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// context.
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void PaintText(nsRenderingContext* aRenderingContext, nsPoint aPt,
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const nsRect& aDirtyRect, const nsCharClipDisplayItem& aItem,
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gfxTextObjectPaint* aObjectPaint = nullptr,
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DrawPathCallbacks* aCallbacks = nullptr);
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// helper: paint text frame when we're impacted by at least one selection.
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// Return false if the text was not painted and we should continue with
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// the fast path.
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bool PaintTextWithSelection(gfxContext* aCtx,
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const gfxPoint& aFramePt,
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const gfxPoint& aTextBaselinePt,
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const gfxRect& aDirtyRect,
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PropertyProvider& aProvider,
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uint32_t aContentOffset,
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uint32_t aContentLength,
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nsTextPaintStyle& aTextPaintStyle,
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const nsCharClipDisplayItem::ClipEdges& aClipEdges,
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gfxTextObjectPaint* aObjectPaint,
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DrawPathCallbacks* aCallbacks);
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// helper: paint text with foreground and background colors determined
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// by selection(s). Also computes a mask of all selection types applying to
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// our text, returned in aAllTypes.
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// Return false if the text was not painted and we should continue with
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// the fast path.
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bool PaintTextWithSelectionColors(gfxContext* aCtx,
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const gfxPoint& aFramePt,
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const gfxPoint& aTextBaselinePt,
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const gfxRect& aDirtyRect,
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PropertyProvider& aProvider,
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uint32_t aContentOffset,
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uint32_t aContentLength,
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nsTextPaintStyle& aTextPaintStyle,
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SelectionDetails* aDetails,
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SelectionType* aAllTypes,
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const nsCharClipDisplayItem::ClipEdges& aClipEdges,
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DrawPathCallbacks* aCallbacks);
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// helper: paint text decorations for text selected by aSelectionType
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void PaintTextSelectionDecorations(gfxContext* aCtx,
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const gfxPoint& aFramePt,
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const gfxPoint& aTextBaselinePt,
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const gfxRect& aDirtyRect,
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PropertyProvider& aProvider,
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uint32_t aContentOffset,
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uint32_t aContentLength,
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nsTextPaintStyle& aTextPaintStyle,
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SelectionDetails* aDetails,
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SelectionType aSelectionType,
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DrawPathCallbacks* aCallbacks);
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virtual nscolor GetCaretColorAt(int32_t aOffset) MOZ_OVERRIDE;
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int16_t GetSelectionStatus(int16_t* aSelectionFlags);
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#ifdef DEBUG
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void ToCString(nsCString& aBuf, int32_t* aTotalContentLength) const;
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#endif
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int32_t GetContentOffset() const { return mContentOffset; }
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int32_t GetContentLength() const
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{
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NS_ASSERTION(GetContentEnd() - mContentOffset >= 0, "negative length");
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return GetContentEnd() - mContentOffset;
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}
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int32_t GetContentEnd() const;
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// This returns the length the frame thinks it *should* have after it was
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// last reflowed (0 if it hasn't been reflowed yet). This should be used only
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// when setting up the text offsets for a new continuation frame.
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int32_t GetContentLengthHint() const { return mContentLengthHint; }
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// Compute the length of the content mapped by this frame
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// and all its in-flow siblings. Basically this means starting at mContentOffset
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// and going to the end of the text node or the next bidi continuation
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// boundary.
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int32_t GetInFlowContentLength();
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/**
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* Acquires the text run for this content, if necessary.
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* @param aWhichTextRun indicates whether to get an inflated or non-inflated
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* text run
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* @param aReferenceContext the rendering context to use as a reference for
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* creating the textrun, if available (if not, we'll create one which will
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* just be slower)
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* @param aLineContainer the block ancestor for this frame, or nullptr if
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* unknown
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* @param aFlowEndInTextRun if non-null, this returns the textrun offset of
|
|
* end of the text associated with this frame and its in-flow siblings
|
|
* @return a gfxSkipCharsIterator set up to map DOM offsets for this frame
|
|
* to offsets into the textrun; its initial offset is set to this frame's
|
|
* content offset
|
|
*/
|
|
gfxSkipCharsIterator EnsureTextRun(TextRunType aWhichTextRun,
|
|
gfxContext* aReferenceContext = nullptr,
|
|
nsIFrame* aLineContainer = nullptr,
|
|
const nsLineList::iterator* aLine = nullptr,
|
|
uint32_t* aFlowEndInTextRun = nullptr);
|
|
|
|
gfxTextRun* GetTextRun(TextRunType aWhichTextRun) {
|
|
if (aWhichTextRun == eInflated || !HasFontSizeInflation())
|
|
return mTextRun;
|
|
return GetUninflatedTextRun();
|
|
}
|
|
gfxTextRun* GetUninflatedTextRun();
|
|
void SetTextRun(gfxTextRun* aTextRun, TextRunType aWhichTextRun,
|
|
float aInflation);
|
|
/**
|
|
* Notify the frame that it should drop its pointer to a text run.
|
|
* Returns whether the text run was removed (i.e., whether it was
|
|
* associated with this frame, either as its inflated or non-inflated
|
|
* text run.
|
|
*/
|
|
bool RemoveTextRun(gfxTextRun* aTextRun);
|
|
/**
|
|
* Clears out |mTextRun| (or the uninflated text run, when aInflated
|
|
* is nsTextFrame::eNotInflated and there is inflation) from all frames that hold a
|
|
* reference to it, starting at |aStartContinuation|, or if it's
|
|
* nullptr, starting at |this|. Deletes the text run if all references
|
|
* were cleared and it's not cached.
|
|
*/
|
|
void ClearTextRun(nsTextFrame* aStartContinuation,
|
|
TextRunType aWhichTextRun);
|
|
|
|
void ClearTextRuns() {
|
|
ClearTextRun(nullptr, nsTextFrame::eInflated);
|
|
if (HasFontSizeInflation()) {
|
|
ClearTextRun(nullptr, nsTextFrame::eNotInflated);
|
|
}
|
|
}
|
|
|
|
// Get the DOM content range mapped by this frame after excluding
|
|
// whitespace subject to start-of-line and end-of-line trimming.
|
|
// The textrun must have been created before calling this.
|
|
struct TrimmedOffsets {
|
|
int32_t mStart;
|
|
int32_t mLength;
|
|
int32_t GetEnd() const { return mStart + mLength; }
|
|
};
|
|
TrimmedOffsets GetTrimmedOffsets(const nsTextFragment* aFrag,
|
|
bool aTrimAfter);
|
|
|
|
// Similar to Reflow(), but for use from nsLineLayout
|
|
void ReflowText(nsLineLayout& aLineLayout, nscoord aAvailableWidth,
|
|
nsRenderingContext* aRenderingContext,
|
|
nsHTMLReflowMetrics& aMetrics, nsReflowStatus& aStatus);
|
|
|
|
bool IsFloatingFirstLetterChild() const;
|
|
|
|
protected:
|
|
virtual ~nsTextFrame();
|
|
|
|
nsIFrame* mNextContinuation;
|
|
// The key invariant here is that mContentOffset never decreases along
|
|
// a next-continuation chain. And of course mContentOffset is always <= the
|
|
// the text node's content length, and the mContentOffset for the first frame
|
|
// is always 0. Furthermore the text mapped by a frame is determined by
|
|
// GetContentOffset() and GetContentLength()/GetContentEnd(), which get
|
|
// the length from the difference between this frame's offset and the next
|
|
// frame's offset, or the text length if there is no next frame. This means
|
|
// the frames always map the text node without overlapping or leaving any gaps.
|
|
int32_t mContentOffset;
|
|
// This does *not* indicate the length of text currently mapped by the frame;
|
|
// instead it's a hint saying that this frame *wants* to map this much text
|
|
// so if we create a new continuation, this is where that continuation should
|
|
// start.
|
|
int32_t mContentLengthHint;
|
|
nscoord mAscent;
|
|
gfxTextRun* mTextRun;
|
|
|
|
/**
|
|
* Return true if the frame is part of a Selection.
|
|
* Helper method to implement the public IsSelected() API.
|
|
*/
|
|
virtual bool IsFrameSelected() const MOZ_OVERRIDE;
|
|
|
|
// The caller of this method must call DestroySelectionDetails() on the
|
|
// return value, if that return value is not null. Calling
|
|
// DestroySelectionDetails() on a null value is still OK, just not necessary.
|
|
SelectionDetails* GetSelectionDetails();
|
|
|
|
void UnionAdditionalOverflow(nsPresContext* aPresContext,
|
|
const nsHTMLReflowState& aBlockReflowState,
|
|
PropertyProvider& aProvider,
|
|
nsRect* aVisualOverflowRect,
|
|
bool aIncludeTextDecorations);
|
|
|
|
void PaintOneShadow(uint32_t aOffset,
|
|
uint32_t aLength,
|
|
nsCSSShadowItem* aShadowDetails,
|
|
PropertyProvider* aProvider,
|
|
const nsRect& aDirtyRect,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt,
|
|
gfxContext* aCtx,
|
|
const nscolor& aForegroundColor,
|
|
const nsCharClipDisplayItem::ClipEdges& aClipEdges,
|
|
nscoord aLeftSideOffset,
|
|
gfxRect& aBoundingBox);
|
|
|
|
struct LineDecoration {
|
|
nsIFrame* mFrame;
|
|
|
|
// This is represents the offset from our baseline to mFrame's baseline;
|
|
// positive offsets are *above* the baseline and negative offsets below
|
|
nscoord mBaselineOffset;
|
|
|
|
nscolor mColor;
|
|
uint8_t mStyle;
|
|
|
|
LineDecoration(nsIFrame *const aFrame,
|
|
const nscoord aOff,
|
|
const nscolor aColor,
|
|
const uint8_t aStyle)
|
|
: mFrame(aFrame),
|
|
mBaselineOffset(aOff),
|
|
mColor(aColor),
|
|
mStyle(aStyle)
|
|
{}
|
|
|
|
LineDecoration(const LineDecoration& aOther)
|
|
: mFrame(aOther.mFrame),
|
|
mBaselineOffset(aOther.mBaselineOffset),
|
|
mColor(aOther.mColor),
|
|
mStyle(aOther.mStyle)
|
|
{}
|
|
|
|
bool operator==(const LineDecoration& aOther) const {
|
|
return mFrame == aOther.mFrame &&
|
|
mStyle == aOther.mStyle &&
|
|
mColor == aOther.mColor &&
|
|
mBaselineOffset == aOther.mBaselineOffset;
|
|
}
|
|
|
|
bool operator!=(const LineDecoration& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
};
|
|
struct TextDecorations {
|
|
nsAutoTArray<LineDecoration, 1> mOverlines, mUnderlines, mStrikes;
|
|
|
|
TextDecorations() { }
|
|
|
|
bool HasDecorationLines() const {
|
|
return HasUnderline() || HasOverline() || HasStrikeout();
|
|
}
|
|
bool HasUnderline() const {
|
|
return !mUnderlines.IsEmpty();
|
|
}
|
|
bool HasOverline() const {
|
|
return !mOverlines.IsEmpty();
|
|
}
|
|
bool HasStrikeout() const {
|
|
return !mStrikes.IsEmpty();
|
|
}
|
|
bool operator==(const TextDecorations& aOther) const {
|
|
return mOverlines == aOther.mOverlines &&
|
|
mUnderlines == aOther.mUnderlines &&
|
|
mStrikes == aOther.mStrikes;
|
|
}
|
|
|
|
bool operator!=(const TextDecorations& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
};
|
|
enum TextDecorationColorResolution {
|
|
eResolvedColors,
|
|
eUnresolvedColors
|
|
};
|
|
void GetTextDecorations(nsPresContext* aPresContext,
|
|
TextDecorationColorResolution aColorResolution,
|
|
TextDecorations& aDecorations);
|
|
|
|
void DrawTextRun(gfxContext* const aCtx,
|
|
const gfxPoint& aTextBaselinePt,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
PropertyProvider& aProvider,
|
|
nscolor aTextColor,
|
|
gfxFloat& aAdvanceWidth,
|
|
bool aDrawSoftHyphen,
|
|
gfxTextObjectPaint* aObjectPaint,
|
|
DrawPathCallbacks* aCallbacks);
|
|
|
|
void DrawTextRunAndDecorations(gfxContext* const aCtx,
|
|
const gfxRect& aDirtyRect,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
PropertyProvider& aProvider,
|
|
const nsTextPaintStyle& aTextStyle,
|
|
nscolor aTextColor,
|
|
const nsCharClipDisplayItem::ClipEdges& aClipEdges,
|
|
gfxFloat& aAdvanceWidth,
|
|
bool aDrawSoftHyphen,
|
|
const TextDecorations& aDecorations,
|
|
const nscolor* const aDecorationOverrideColor,
|
|
gfxTextObjectPaint* aObjectPaint,
|
|
DrawPathCallbacks* aCallbacks);
|
|
|
|
void DrawText(gfxContext* const aCtx,
|
|
const gfxRect& aDirtyRect,
|
|
const gfxPoint& aFramePt,
|
|
const gfxPoint& aTextBaselinePt,
|
|
uint32_t aOffset,
|
|
uint32_t aLength,
|
|
PropertyProvider& aProvider,
|
|
const nsTextPaintStyle& aTextStyle,
|
|
nscolor aTextColor,
|
|
const nsCharClipDisplayItem::ClipEdges& aClipEdges,
|
|
gfxFloat& aAdvanceWidth,
|
|
bool aDrawSoftHyphen,
|
|
const nscolor* const aDecorationOverrideColor = nullptr,
|
|
gfxTextObjectPaint* aObjectPaint = nullptr,
|
|
DrawPathCallbacks* aCallbacks = nullptr);
|
|
|
|
// Set non empty rect to aRect, it should be overflow rect or frame rect.
|
|
// If the result rect is larger than the given rect, this returns true.
|
|
bool CombineSelectionUnderlineRect(nsPresContext* aPresContext,
|
|
nsRect& aRect);
|
|
|
|
ContentOffsets GetCharacterOffsetAtFramePointInternal(nsPoint aPoint,
|
|
bool aForInsertionPoint);
|
|
|
|
void ClearFrameOffsetCache();
|
|
|
|
virtual bool HasAnyNoncollapsedCharacters() MOZ_OVERRIDE;
|
|
|
|
void ClearMetrics(nsHTMLReflowMetrics& aMetrics);
|
|
};
|
|
|
|
#endif
|