Revision 70cc08dffc44b0c6f500402a72046e6624e940ce authored by Ehsan Akhgari on 09 May 2014, 21:02:29 UTC, committed by Ehsan Akhgari on 09 May 2014, 21:02:29 UTC
1 parent a8aaea8
nsTextFrame.h
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 nsTextFrame_h__
#define nsTextFrame_h__
#include "mozilla/Attributes.h"
#include "nsFrame.h"
#include "nsSplittableFrame.h"
#include "nsLineBox.h"
#include "gfxFont.h"
#include "gfxSkipChars.h"
#include "nsDisplayList.h"
class nsTextPaintStyle;
class PropertyProvider;
// This state bit is set on frames whose character data offsets need to be
// fixed up
#define TEXT_OFFSETS_NEED_FIXING NS_FRAME_STATE_BIT(30)
// This state bit is set on frames that have some non-collapsed characters after
// reflow
#define TEXT_HAS_NONCOLLAPSED_CHARACTERS NS_FRAME_STATE_BIT(31)
// This state bit is set on children of token MathML elements
#define TEXT_IS_IN_TOKEN_MATHML NS_FRAME_STATE_BIT(32)
// This state bit is set on token MathML elements if the token represents an
// <mi> tag whose inner HTML consists of a single non-whitespace character
// to allow special rendering behaviour.
#define TEXT_IS_IN_SINGLE_CHAR_MI NS_FRAME_STATE_BIT(59)
#define TEXT_HAS_FONT_INFLATION NS_FRAME_STATE_BIT(61)
typedef nsFrame nsTextFrameBase;
class nsDisplayTextGeometry;
class nsDisplayText;
class nsTextFrameTextRunCache {
public:
static void Init();
static void Shutdown();
};
class nsTextFrame : public nsTextFrameBase {
public:
NS_DECL_QUERYFRAME_TARGET(nsTextFrame)
NS_DECL_FRAMEARENA_HELPERS
friend class nsContinuingTextFrame;
friend class nsDisplayTextGeometry;
friend class nsDisplayText;
nsTextFrame(nsStyleContext* aContext)
: nsTextFrameBase(aContext)
{
NS_ASSERTION(mContentOffset == 0, "Bogus content offset");
}
// nsQueryFrame
NS_DECL_QUERYFRAME
// nsIFrame
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists) MOZ_OVERRIDE;
virtual void Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
virtual void DestroyFrom(nsIFrame* aDestructRoot) MOZ_OVERRIDE;
NS_IMETHOD GetCursor(const nsPoint& aPoint,
nsIFrame::Cursor& aCursor) MOZ_OVERRIDE;
NS_IMETHOD CharacterDataChanged(CharacterDataChangeInfo* aInfo) MOZ_OVERRIDE;
virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext) MOZ_OVERRIDE;
virtual nsIFrame* GetNextContinuation() const MOZ_OVERRIDE {
return mNextContinuation;
}
virtual void SetNextContinuation(nsIFrame* aNextContinuation) MOZ_OVERRIDE {
NS_ASSERTION (!aNextContinuation || GetType() == aNextContinuation->GetType(),
"setting a next continuation with incorrect type!");
NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextContinuation, this),
"creating a loop in continuation chain!");
mNextContinuation = aNextContinuation;
if (aNextContinuation)
aNextContinuation->RemoveStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
}
virtual nsIFrame* GetNextInFlowVirtual() const MOZ_OVERRIDE { return GetNextInFlow(); }
nsIFrame* GetNextInFlow() const {
return mNextContinuation && (mNextContinuation->GetStateBits() & NS_FRAME_IS_FLUID_CONTINUATION) ?
mNextContinuation : nullptr;
}
virtual void SetNextInFlow(nsIFrame* aNextInFlow) MOZ_OVERRIDE {
NS_ASSERTION (!aNextInFlow || GetType() == aNextInFlow->GetType(),
"setting a next in flow with incorrect type!");
NS_ASSERTION (!nsSplittableFrame::IsInNextContinuationChain(aNextInFlow, this),
"creating a loop in continuation chain!");
mNextContinuation = aNextInFlow;
if (aNextInFlow)
aNextInFlow->AddStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
}
virtual nsIFrame* LastInFlow() const MOZ_OVERRIDE;
virtual nsIFrame* LastContinuation() const MOZ_OVERRIDE;
virtual nsSplittableType GetSplittableType() const MOZ_OVERRIDE {
return NS_FRAME_SPLITTABLE;
}
/**
* Get the "type" of the frame
*
* @see nsGkAtoms::textFrame
*/
virtual nsIAtom* GetType() const MOZ_OVERRIDE;
virtual bool IsFrameOfType(uint32_t aFlags) const MOZ_OVERRIDE
{
// Set the frame state bit for text frames to mark them as replaced.
// XXX kipp: temporary
return nsFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced |
nsIFrame::eLineParticipant));
}
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
virtual void InvalidateFrameWithRect(const nsRect& aRect, uint32_t aDisplayItemKey = 0) MOZ_OVERRIDE;
#ifdef DEBUG
void List(FILE* out, int32_t aIndent, uint32_t aFlags = 0) const MOZ_OVERRIDE;
NS_IMETHOD GetFrameName(nsAString& aResult) const MOZ_OVERRIDE;
NS_IMETHOD_(nsFrameState) GetDebugStateBits() const MOZ_OVERRIDE;
#endif
virtual ContentOffsets CalcContentOffsetsFromFramePoint(nsPoint aPoint) MOZ_OVERRIDE;
ContentOffsets GetCharacterOffsetAtFramePoint(const nsPoint &aPoint);
/**
* This is called only on the primary text frame. It indicates that
* the selection state of the given character range has changed.
* Text in the range is unconditionally invalidated
* (Selection::Repaint depends on this).
* @param aSelected true if the selection has been added to the range,
* false otherwise
* @param aType the type of selection added or removed
*/
void SetSelectedRange(uint32_t aStart, uint32_t aEnd, bool aSelected,
SelectionType aType);
virtual bool PeekOffsetNoAmount(bool aForward, int32_t* aOffset) MOZ_OVERRIDE;
virtual bool PeekOffsetCharacter(bool aForward, int32_t* aOffset,
bool aRespectClusters = true) MOZ_OVERRIDE;
virtual bool PeekOffsetWord(bool aForward, bool aWordSelectEatSpace, bool aIsKeyboardSelect,
int32_t* aOffset, PeekWordState* aState) MOZ_OVERRIDE;
NS_IMETHOD CheckVisibility(nsPresContext* aContext, int32_t aStartIndex, int32_t aEndIndex, bool aRecurse, bool *aFinished, bool *_retval) MOZ_OVERRIDE;
// Flags for aSetLengthFlags
enum { ALLOW_FRAME_CREATION_AND_DESTRUCTION = 0x01 };
// Update offsets to account for new length. This may clear mTextRun.
void SetLength(int32_t aLength, nsLineLayout* aLineLayout,
uint32_t aSetLengthFlags = 0);
NS_IMETHOD GetOffsets(int32_t &start, int32_t &end)const MOZ_OVERRIDE;
virtual void AdjustOffsetsForBidi(int32_t start, int32_t end) MOZ_OVERRIDE;
NS_IMETHOD GetPointFromOffset(int32_t inOffset,
nsPoint* outPoint) MOZ_OVERRIDE;
NS_IMETHOD GetChildFrameContainingOffset(int32_t inContentOffset,
bool inHint,
int32_t* outFrameContentOffset,
nsIFrame* *outChildFrame) MOZ_OVERRIDE;
virtual bool IsVisibleInSelection(nsISelection* aSelection) MOZ_OVERRIDE;
virtual bool IsEmpty() MOZ_OVERRIDE;
virtual bool IsSelfEmpty() MOZ_OVERRIDE { return IsEmpty(); }
virtual nscoord GetBaseline() const MOZ_OVERRIDE;
/**
* @return true if this text frame ends with a newline character. It
* should return false if this is not a text frame.
*/
virtual bool HasTerminalNewline() const MOZ_OVERRIDE;
/**
* Returns true if this text frame is logically adjacent to the end of the
* line.
*/
bool IsAtEndOfLine() const;
/**
* Call this only after reflow the frame. Returns true if non-collapsed
* characters are present.
*/
bool HasNoncollapsedCharacters() const {
return (GetStateBits() & TEXT_HAS_NONCOLLAPSED_CHARACTERS) != 0;
}
#ifdef ACCESSIBILITY
virtual mozilla::a11y::AccType AccessibleType() MOZ_OVERRIDE;
#endif
float GetFontSizeInflation() const;
bool IsCurrentFontInflation(float aInflation) const;
bool HasFontSizeInflation() const {
return (GetStateBits() & TEXT_HAS_FONT_INFLATION) != 0;
}
void SetFontSizeInflation(float aInflation);
virtual void MarkIntrinsicWidthsDirty() MOZ_OVERRIDE;
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext) MOZ_OVERRIDE;
virtual void AddInlineMinWidth(nsRenderingContext *aRenderingContext,
InlineMinWidthData *aData) MOZ_OVERRIDE;
virtual void AddInlinePrefWidth(nsRenderingContext *aRenderingContext,
InlinePrefWidthData *aData) MOZ_OVERRIDE;
virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder, nsSize aPadding,
uint32_t aFlags) MOZ_OVERRIDE;
virtual nsRect ComputeTightBounds(gfxContext* aContext) const MOZ_OVERRIDE;
virtual nsresult GetPrefWidthTightBounds(nsRenderingContext* aContext,
nscoord* aX,
nscoord* aXMost) MOZ_OVERRIDE;
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aMetrics,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus) MOZ_OVERRIDE;
virtual bool CanContinueTextRun() const MOZ_OVERRIDE;
// Method that is called for a text frame that is logically
// adjacent to the end of the line (i.e. followed only by empty text frames,
// placeholders or inlines containing such).
struct TrimOutput {
// true if we trimmed some space or changed metrics in some other way.
// In this case, we should call RecomputeOverflow on this frame.
bool mChanged;
// true if the last character is not justifiable so should be subtracted
// from the count of justifiable characters in the frame, since the last
// character in a line is not justifiable.
bool mLastCharIsJustifiable;
// an amount to *subtract* from the frame's width (zero if !mChanged)
nscoord mDeltaWidth;
};
TrimOutput TrimTrailingWhiteSpace(nsRenderingContext* aRC);
virtual nsresult GetRenderedText(nsAString* aString = nullptr,
gfxSkipChars* aSkipChars = nullptr,
gfxSkipCharsIterator* aSkipIter = nullptr,
uint32_t aSkippedStartOffset = 0,
uint32_t aSkippedMaxLength = UINT32_MAX) MOZ_OVERRIDE;
nsOverflowAreas
RecomputeOverflow(const nsHTMLReflowState& aBlockReflowState);
enum TextRunType {
// Anything in reflow (but not intrinsic width calculation) or
// painting should use the inflated text run (i.e., with font size
// inflation applied).
eInflated,
// Intrinsic width calculation should use the non-inflated text run.
// When there is font size inflation, it will be different.
eNotInflated
};
void AddInlineMinWidthForFlow(nsRenderingContext *aRenderingContext,
nsIFrame::InlineMinWidthData *aData,
TextRunType aTextRunType);
void AddInlinePrefWidthForFlow(nsRenderingContext *aRenderingContext,
InlinePrefWidthData *aData,
TextRunType aTextRunType);
/**
* Calculate the horizontal bounds of the grapheme clusters that fit entirely
* inside the given left/right edges (which are positive lengths from the
* respective frame edge). If an input value is zero it is ignored and the
* result for that edge is zero. All out parameter values are undefined when
* the method returns false.
* @return true if at least one whole grapheme cluster fit between the edges
*/
bool MeasureCharClippedText(nscoord aLeftEdge, nscoord aRightEdge,
nscoord* aSnappedLeftEdge,
nscoord* aSnappedRightEdge);
/**
* Same as above; this method also the returns the corresponding text run
* offset and number of characters that fit. All out parameter values are
* undefined when the method returns false.
* @return true if at least one whole grapheme cluster fit between the edges
*/
bool MeasureCharClippedText(PropertyProvider& aProvider,
nscoord aLeftEdge, nscoord aRightEdge,
uint32_t* aStartOffset, uint32_t* aMaxLength,
nscoord* aSnappedLeftEdge,
nscoord* aSnappedRightEdge);
/**
* Object with various callbacks for PaintText() to invoke for different parts
* of the frame's text rendering, when we're generating paths rather than
* painting.
*
* Callbacks are invoked in the following order:
*
* (NotifyBeforeSelectionBackground NotifySelectionBackgroundPathEmitted)?
* (NotifyBeforeDecorationLine NotifyDecorationLinePathEmitted)*
* NotifyBeforeText
* (NotifyGlyphPathEmitted |
* (NotifyBeforeSVGGlyphPainted NotifyAfterSVGGlyphPainted))*
* NotifyAfterText
* (NotifyBeforeDecorationLine NotifyDecorationLinePathEmitted)*
* (NotifyBeforeSelectionDecorationLine NotifySelectionDecorationLinePathEmitted)*
*
* The color of each part of the frame's text rendering is passed as an argument
* to the NotifyBefore* callback for that part. The nscolor can take on one of
* the three selection special colors defined in LookAndFeel.h --
* NS_TRANSPARENT, NS_SAME_AS_FOREGROUND_COLOR and
* NS_40PERCENT_FOREGROUND_COLOR.
*/
struct DrawPathCallbacks : gfxTextRunDrawCallbacks
{
/**
* @param aShouldPaintSVGGlyphs Whether SVG glyphs should be painted.
*/
DrawPathCallbacks(bool aShouldPaintSVGGlyphs = false)
: gfxTextRunDrawCallbacks(aShouldPaintSVGGlyphs)
{
}
/**
* Called just before any paths have been emitted to the gfxContext
* for the glyphs of the frame's text.
*/
virtual void NotifyBeforeText(nscolor aColor) { }
/**
* Called just after all the paths have been emitted to the gfxContext
* for the glyphs of the frame's text.
*/
virtual void NotifyAfterText() { }
/**
* Called just before a path corresponding to the selection background
* has been emitted to the gfxContext.
*/
virtual void NotifyBeforeSelectionBackground(nscolor aColor) { }
/**
* Called just after a path corresponding to the selection background
* has been emitted to the gfxContext.
*/
virtual void NotifySelectionBackgroundPathEmitted() { }
/**
* Called just before a path corresponding to a text decoration line
* has been emitted to the gfxContext.
*/
virtual void NotifyBeforeDecorationLine(nscolor aColor) { }
/**
* Called just after a path corresponding to a text decoration line
* has been emitted to the gfxContext.
*/
virtual void NotifyDecorationLinePathEmitted() { }
/**
* Called just before a path corresponding to a selection decoration line
* has been emitted to the gfxContext.
*/
virtual void NotifyBeforeSelectionDecorationLine(nscolor aColor) { }
/**
* Called just after a path corresponding to a selection decoration line
* has been emitted to the gfxContext.
*/
virtual void NotifySelectionDecorationLinePathEmitted() { }
};
// Primary frame paint method called from nsDisplayText. Can also be used
// to generate paths rather than paint the frame's text by passing a callback
// object. The private DrawText() is what applies the text to a graphics
// context.
void PaintText(nsRenderingContext* aRenderingContext, nsPoint aPt,
const nsRect& aDirtyRect, const nsCharClipDisplayItem& aItem,
gfxTextContextPaint* aContextPaint = nullptr,
DrawPathCallbacks* aCallbacks = nullptr);
// helper: paint text frame when we're impacted by at least one selection.
// Return false if the text was not painted and we should continue with
// the fast path.
bool PaintTextWithSelection(gfxContext* aCtx,
const gfxPoint& aFramePt,
const gfxPoint& aTextBaselinePt,
const gfxRect& aDirtyRect,
PropertyProvider& aProvider,
uint32_t aContentOffset,
uint32_t aContentLength,
nsTextPaintStyle& aTextPaintStyle,
const nsCharClipDisplayItem::ClipEdges& aClipEdges,
gfxTextContextPaint* aContextPaint,
DrawPathCallbacks* aCallbacks);
// helper: paint text with foreground and background colors determined
// by selection(s). Also computes a mask of all selection types applying to
// our text, returned in aAllTypes.
// Return false if the text was not painted and we should continue with
// the fast path.
bool PaintTextWithSelectionColors(gfxContext* aCtx,
const gfxPoint& aFramePt,
const gfxPoint& aTextBaselinePt,
const gfxRect& aDirtyRect,
PropertyProvider& aProvider,
uint32_t aContentOffset,
uint32_t aContentLength,
nsTextPaintStyle& aTextPaintStyle,
SelectionDetails* aDetails,
SelectionType* aAllTypes,
const nsCharClipDisplayItem::ClipEdges& aClipEdges,
DrawPathCallbacks* aCallbacks);
// helper: paint text decorations for text selected by aSelectionType
void PaintTextSelectionDecorations(gfxContext* aCtx,
const gfxPoint& aFramePt,
const gfxPoint& aTextBaselinePt,
const gfxRect& aDirtyRect,
PropertyProvider& aProvider,
uint32_t aContentOffset,
uint32_t aContentLength,
nsTextPaintStyle& aTextPaintStyle,
SelectionDetails* aDetails,
SelectionType aSelectionType,
DrawPathCallbacks* aCallbacks);
virtual nscolor GetCaretColorAt(int32_t aOffset) MOZ_OVERRIDE;
int16_t GetSelectionStatus(int16_t* aSelectionFlags);
#ifdef DEBUG
void ToCString(nsCString& aBuf, int32_t* aTotalContentLength) const;
#endif
int32_t GetContentOffset() const { return mContentOffset; }
int32_t GetContentLength() const
{
NS_ASSERTION(GetContentEnd() - mContentOffset >= 0, "negative length");
return GetContentEnd() - mContentOffset;
}
int32_t GetContentEnd() const;
// This returns the length the frame thinks it *should* have after it was
// last reflowed (0 if it hasn't been reflowed yet). This should be used only
// when setting up the text offsets for a new continuation frame.
int32_t GetContentLengthHint() const { return mContentLengthHint; }
// Compute the length of the content mapped by this frame
// and all its in-flow siblings. Basically this means starting at mContentOffset
// and going to the end of the text node or the next bidi continuation
// boundary.
int32_t GetInFlowContentLength();
/**
* Acquires the text run for this content, if necessary.
* @param aWhichTextRun indicates whether to get an inflated or non-inflated
* text run
* @param aReferenceContext the rendering context to use as a reference for
* creating the textrun, if available (if not, we'll create one which will
* just be slower)
* @param aLineContainer the block ancestor for this frame, or nullptr if
* unknown
* @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, bool aPostReflow = true);
// 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,
gfxTextContextPaint* aContextPaint,
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,
gfxTextContextPaint* aContextPaint,
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,
gfxTextContextPaint* aContextPaint = 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
Computing file changes ...
