зеркало из https://github.com/mozilla/gecko-dev.git
899 строки
33 KiB
C++
899 строки
33 KiB
C++
/* -*- 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 "mozilla/EventForwards.h"
|
|
#include "mozilla/gfx/2D.h"
|
|
#include "mozilla/UniquePtr.h"
|
|
#include "nsFrame.h"
|
|
#include "nsSplittableFrame.h"
|
|
#include "nsLineBox.h"
|
|
#include "gfxSkipChars.h"
|
|
#include "gfxTextRun.h"
|
|
#include "nsDisplayList.h"
|
|
#include "JustificationUtils.h"
|
|
#include "RubyUtils.h"
|
|
|
|
// Undo the windows.h damage
|
|
#if defined(XP_WIN) && defined(DrawText)
|
|
#undef DrawText
|
|
#endif
|
|
|
|
class nsTextPaintStyle;
|
|
class PropertyProvider;
|
|
struct SelectionDetails;
|
|
class nsTextFragment;
|
|
|
|
class nsDisplayTextGeometry;
|
|
class nsDisplayText;
|
|
|
|
namespace mozilla {
|
|
class SVGContextPaint;
|
|
};
|
|
|
|
class nsTextFrame : public nsFrame
|
|
{
|
|
typedef mozilla::LayoutDeviceRect LayoutDeviceRect;
|
|
typedef mozilla::RawSelectionType RawSelectionType;
|
|
typedef mozilla::SelectionType SelectionType;
|
|
typedef mozilla::TextRangeStyle TextRangeStyle;
|
|
typedef mozilla::gfx::DrawTarget DrawTarget;
|
|
typedef mozilla::gfx::Point Point;
|
|
typedef mozilla::gfx::Rect Rect;
|
|
typedef mozilla::gfx::Size Size;
|
|
typedef gfxTextRun::Range Range;
|
|
|
|
public:
|
|
NS_DECL_QUERYFRAME_TARGET(nsTextFrame)
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
friend class nsContinuingTextFrame;
|
|
friend class nsDisplayTextGeometry;
|
|
friend class nsDisplayText;
|
|
|
|
explicit nsTextFrame(nsStyleContext* aContext)
|
|
: nsFrame(aContext)
|
|
, mNextContinuation(nullptr)
|
|
, mContentOffset(0)
|
|
, mContentLengthHint(0)
|
|
, mAscent(0)
|
|
{
|
|
NS_ASSERTION(mContentOffset == 0, "Bogus content offset");
|
|
}
|
|
|
|
// nsQueryFrame
|
|
NS_DECL_QUERYFRAME
|
|
|
|
// nsIFrame
|
|
void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) override;
|
|
|
|
void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) override;
|
|
|
|
void DestroyFrom(nsIFrame* aDestructRoot) override;
|
|
|
|
nsresult GetCursor(const nsPoint& aPoint, nsIFrame::Cursor& aCursor) override;
|
|
|
|
nsresult CharacterDataChanged(CharacterDataChangeInfo* aInfo) final;
|
|
|
|
nsTextFrame* GetPrevContinuation() const override { return nullptr; }
|
|
nsTextFrame* GetNextContinuation() const final { return mNextContinuation; }
|
|
void SetNextContinuation(nsIFrame* aNextContinuation) final
|
|
{
|
|
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 = static_cast<nsTextFrame*>(aNextContinuation);
|
|
if (aNextContinuation)
|
|
aNextContinuation->RemoveStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
|
|
// Setting a non-fluid continuation might affect our flow length (they're
|
|
// quite rare so we assume it always does) so we delete our cached value:
|
|
GetContent()->DeleteProperty(nsGkAtoms::flowlength);
|
|
}
|
|
nsIFrame* GetNextInFlowVirtual() const override { return GetNextInFlow(); }
|
|
nsTextFrame* GetNextInFlow() const
|
|
{
|
|
return mNextContinuation &&
|
|
(mNextContinuation->GetStateBits() &
|
|
NS_FRAME_IS_FLUID_CONTINUATION)
|
|
? mNextContinuation
|
|
: nullptr;
|
|
}
|
|
void SetNextInFlow(nsIFrame* aNextInFlow) final
|
|
{
|
|
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 = static_cast<nsTextFrame*>(aNextInFlow);
|
|
if (mNextContinuation &&
|
|
!mNextContinuation->HasAnyStateBits(NS_FRAME_IS_FLUID_CONTINUATION)) {
|
|
// Changing from non-fluid to fluid continuation might affect our flow
|
|
// length, so we delete our cached value:
|
|
GetContent()->DeleteProperty(nsGkAtoms::flowlength);
|
|
}
|
|
if (aNextInFlow) {
|
|
aNextInFlow->AddStateBits(NS_FRAME_IS_FLUID_CONTINUATION);
|
|
}
|
|
}
|
|
nsTextFrame* LastInFlow() const final;
|
|
nsTextFrame* LastContinuation() const final;
|
|
|
|
nsSplittableType GetSplittableType() const final
|
|
{
|
|
return NS_FRAME_SPLITTABLE;
|
|
}
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::textFrame
|
|
*/
|
|
nsIAtom* GetType() const final;
|
|
|
|
bool IsFrameOfType(uint32_t aFlags) const final
|
|
{
|
|
// Set the frame state bit for text frames to mark them as replaced.
|
|
// XXX kipp: temporary
|
|
return nsFrame::IsFrameOfType(
|
|
aFlags & ~(nsIFrame::eReplaced | nsIFrame::eLineParticipant));
|
|
}
|
|
|
|
bool ShouldSuppressLineBreak() const
|
|
{
|
|
// If the parent frame of the text frame is ruby content box, it must
|
|
// suppress line break inside. This check is necessary, because when
|
|
// a whitespace is only contained by pseudo ruby frames, its style
|
|
// context won't have SuppressLineBreak bit set.
|
|
if (mozilla::RubyUtils::IsRubyContentBox(GetParent()->GetType())) {
|
|
return true;
|
|
}
|
|
return StyleContext()->ShouldSuppressLineBreak();
|
|
}
|
|
|
|
void InvalidateFrame(uint32_t aDisplayItemKey = 0) override;
|
|
void InvalidateFrameWithRect(const nsRect& aRect,
|
|
uint32_t aDisplayItemKey = 0) override;
|
|
|
|
#ifdef DEBUG_FRAME_DUMP
|
|
void List(FILE* out = stderr,
|
|
const char* aPrefix = "",
|
|
uint32_t aFlags = 0) const override;
|
|
nsresult GetFrameName(nsAString& aResult) const override;
|
|
void ToCString(nsCString& aBuf, int32_t* aTotalContentLength) const;
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
nsFrameState GetDebugStateBits() const override;
|
|
#endif
|
|
|
|
ContentOffsets CalcContentOffsetsFromFramePoint(nsPoint aPoint) 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 aSelectionType);
|
|
|
|
FrameSearchResult PeekOffsetNoAmount(bool aForward,
|
|
int32_t* aOffset) override;
|
|
FrameSearchResult PeekOffsetCharacter(bool aForward,
|
|
int32_t* aOffset,
|
|
bool aRespectClusters = true) override;
|
|
FrameSearchResult PeekOffsetWord(bool aForward,
|
|
bool aWordSelectEatSpace,
|
|
bool aIsKeyboardSelect,
|
|
int32_t* aOffset,
|
|
PeekWordState* aState) override;
|
|
|
|
nsresult CheckVisibility(nsPresContext* aContext,
|
|
int32_t aStartIndex,
|
|
int32_t aEndIndex,
|
|
bool aRecurse,
|
|
bool* aFinished,
|
|
bool* _retval) 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);
|
|
|
|
nsresult GetOffsets(int32_t& start, int32_t& end) const override;
|
|
|
|
void AdjustOffsetsForBidi(int32_t start, int32_t end) override;
|
|
|
|
nsresult GetPointFromOffset(int32_t inOffset, nsPoint* outPoint) override;
|
|
nsresult GetCharacterRectsInRange(int32_t aInOffset,
|
|
int32_t aLength,
|
|
nsTArray<nsRect>& aRects) override;
|
|
|
|
nsresult GetChildFrameContainingOffset(int32_t inContentOffset,
|
|
bool inHint,
|
|
int32_t* outFrameContentOffset,
|
|
nsIFrame** outChildFrame) override;
|
|
|
|
bool IsVisibleInSelection(nsISelection* aSelection) override;
|
|
|
|
bool IsEmpty() override;
|
|
bool IsSelfEmpty() override { return IsEmpty(); }
|
|
nscoord GetLogicalBaseline(mozilla::WritingMode aWritingMode) const final;
|
|
|
|
bool HasSignificantTerminalNewline() const 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
|
|
mozilla::a11y::AccType AccessibleType() override;
|
|
#endif
|
|
|
|
float GetFontSizeInflation() const;
|
|
bool IsCurrentFontInflation(float aInflation) const;
|
|
bool HasFontSizeInflation() const
|
|
{
|
|
return (GetStateBits() & TEXT_HAS_FONT_INFLATION) != 0;
|
|
}
|
|
void SetFontSizeInflation(float aInflation);
|
|
|
|
void MarkIntrinsicISizesDirty() override;
|
|
nscoord GetMinISize(nsRenderingContext* aRenderingContext) override;
|
|
nscoord GetPrefISize(nsRenderingContext* aRenderingContext) override;
|
|
void AddInlineMinISize(nsRenderingContext* aRenderingContext,
|
|
InlineMinISizeData* aData) override;
|
|
void AddInlinePrefISize(nsRenderingContext* aRenderingContext,
|
|
InlinePrefISizeData* aData) override;
|
|
mozilla::LogicalSize ComputeSize(nsRenderingContext* aRenderingContext,
|
|
mozilla::WritingMode aWritingMode,
|
|
const mozilla::LogicalSize& aCBSize,
|
|
nscoord aAvailableISize,
|
|
const mozilla::LogicalSize& aMargin,
|
|
const mozilla::LogicalSize& aBorder,
|
|
const mozilla::LogicalSize& aPadding,
|
|
ComputeSizeFlags aFlags) override;
|
|
nsRect ComputeTightBounds(DrawTarget* aDrawTarget) const override;
|
|
nsresult GetPrefWidthTightBounds(nsRenderingContext* aContext,
|
|
nscoord* aX,
|
|
nscoord* aXMost) override;
|
|
void Reflow(nsPresContext* aPresContext,
|
|
ReflowOutput& aMetrics,
|
|
const ReflowInput& aReflowInput,
|
|
nsReflowStatus& aStatus) override;
|
|
bool CanContinueTextRun() const 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;
|
|
// an amount to *subtract* from the frame's width (zero if !mChanged)
|
|
nscoord mDeltaWidth;
|
|
};
|
|
TrimOutput TrimTrailingWhiteSpace(DrawTarget* aDrawTarget);
|
|
RenderedText GetRenderedText(
|
|
uint32_t aStartOffset = 0,
|
|
uint32_t aEndOffset = UINT32_MAX,
|
|
TextOffsetType aOffsetType = TextOffsetType::OFFSETS_IN_CONTENT_TEXT,
|
|
TrailingWhitespace aTrimTrailingWhitespace =
|
|
TrailingWhitespace::TRIM_TRAILING_WHITESPACE) override;
|
|
|
|
nsOverflowAreas RecomputeOverflow(nsIFrame* aBlockFrame);
|
|
|
|
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 AddInlineMinISizeForFlow(nsRenderingContext* aRenderingContext,
|
|
nsIFrame::InlineMinISizeData* aData,
|
|
TextRunType aTextRunType);
|
|
void AddInlinePrefISizeForFlow(nsRenderingContext* aRenderingContext,
|
|
InlinePrefISizeData* aData,
|
|
TextRunType aTextRunType);
|
|
|
|
/**
|
|
* Calculate the horizontal bounds of the grapheme clusters that fit entirely
|
|
* inside the given left[top]/right[bottom] 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 aVisIStartEdge,
|
|
nscoord aVisIEndEdge,
|
|
nscoord* aSnappedStartEdge,
|
|
nscoord* aSnappedEndEdge);
|
|
/**
|
|
* 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 aVisIStartEdge,
|
|
nscoord aVisIEndEdge,
|
|
uint32_t* aStartOffset,
|
|
uint32_t* aMaxLength,
|
|
nscoord* aSnappedStartEdge,
|
|
nscoord* aSnappedEndEdge);
|
|
|
|
/**
|
|
* 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:
|
|
*
|
|
* NotifySelectionBackgroundNeedsFill?
|
|
* PaintDecorationLine*
|
|
* NotifyBeforeText
|
|
* NotifyGlyphPathEmitted*
|
|
* NotifyAfterText
|
|
* PaintDecorationLine*
|
|
* PaintSelectionDecorationLine*
|
|
*
|
|
* 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.
|
|
*/
|
|
explicit DrawPathCallbacks(bool aShouldPaintSVGGlyphs = false)
|
|
: gfxTextRunDrawCallbacks(aShouldPaintSVGGlyphs)
|
|
{}
|
|
|
|
/**
|
|
* Called to have the selection highlight drawn before the text is drawn
|
|
* over the top.
|
|
*/
|
|
virtual void NotifySelectionBackgroundNeedsFill(const Rect& aBackgroundRect,
|
|
nscolor aColor,
|
|
DrawTarget& aDrawTarget)
|
|
{}
|
|
|
|
/**
|
|
* Called before (for under/over-line) or after (for line-through) the text
|
|
* is drawn to have a text decoration line drawn.
|
|
*/
|
|
virtual void PaintDecorationLine(Rect aPath, nscolor aColor) {}
|
|
|
|
/**
|
|
* Called after selected text is drawn to have a decoration line drawn over
|
|
* the text. (All types of text decoration are drawn after the text when
|
|
* text is selected.)
|
|
*/
|
|
virtual void PaintSelectionDecorationLine(Rect aPath, nscolor aColor) {}
|
|
|
|
/**
|
|
* 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 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() {}
|
|
};
|
|
|
|
struct PaintTextParams
|
|
{
|
|
gfxContext* context;
|
|
gfxPoint framePt;
|
|
LayoutDeviceRect dirtyRect;
|
|
mozilla::SVGContextPaint* contextPaint = nullptr;
|
|
DrawPathCallbacks* callbacks = nullptr;
|
|
enum
|
|
{
|
|
PaintText, // Normal text painting.
|
|
PaintTextBGColor, // Only paint background color of the selected text
|
|
// range in this state.
|
|
GenerateTextMask // To generate a mask from a text frame. Should
|
|
// only paint text itself with opaque color.
|
|
// Text shadow, text selection color and text
|
|
// decoration are all discarded in this state.
|
|
};
|
|
uint8_t state = PaintText;
|
|
explicit PaintTextParams(gfxContext* aContext)
|
|
: context(aContext)
|
|
{
|
|
}
|
|
|
|
bool IsPaintText() const { return state == PaintText; }
|
|
bool IsGenerateTextMask() const { return state == GenerateTextMask; }
|
|
bool IsPaintBGColor() const { return state == PaintTextBGColor; }
|
|
};
|
|
|
|
struct PaintTextSelectionParams : PaintTextParams
|
|
{
|
|
gfxPoint textBaselinePt;
|
|
PropertyProvider* provider = nullptr;
|
|
Range contentRange;
|
|
nsTextPaintStyle* textPaintStyle = nullptr;
|
|
explicit PaintTextSelectionParams(const PaintTextParams& aParams)
|
|
: PaintTextParams(aParams)
|
|
{}
|
|
};
|
|
|
|
struct DrawTextRunParams
|
|
{
|
|
gfxContext* context;
|
|
PropertyProvider* provider = nullptr;
|
|
gfxFloat* advanceWidth = nullptr;
|
|
mozilla::SVGContextPaint* contextPaint = nullptr;
|
|
DrawPathCallbacks* callbacks = nullptr;
|
|
nscolor textColor = NS_RGBA(0, 0, 0, 0);
|
|
nscolor textStrokeColor = NS_RGBA(0, 0, 0, 0);
|
|
float textStrokeWidth = 0.0f;
|
|
bool drawSoftHyphen = false;
|
|
explicit DrawTextRunParams(gfxContext* aContext)
|
|
: context(aContext)
|
|
{}
|
|
};
|
|
|
|
struct DrawTextParams : DrawTextRunParams
|
|
{
|
|
gfxPoint framePt;
|
|
LayoutDeviceRect dirtyRect;
|
|
const nsTextPaintStyle* textStyle = nullptr;
|
|
const nsCharClipDisplayItem::ClipEdges* clipEdges = nullptr;
|
|
const nscolor* decorationOverrideColor = nullptr;
|
|
explicit DrawTextParams(gfxContext* aContext)
|
|
: DrawTextRunParams(aContext)
|
|
{}
|
|
};
|
|
|
|
// 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(const PaintTextParams& aParams,
|
|
const nsCharClipDisplayItem& aItem,
|
|
float aOpacity = 1.0f);
|
|
// 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(
|
|
const PaintTextSelectionParams& aParams,
|
|
const nsCharClipDisplayItem::ClipEdges& aClipEdges);
|
|
// 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(
|
|
const PaintTextSelectionParams& aParams,
|
|
const mozilla::UniquePtr<SelectionDetails>& aDetails,
|
|
RawSelectionType* aAllRawSelectionTypes,
|
|
const nsCharClipDisplayItem::ClipEdges& aClipEdges);
|
|
// helper: paint text decorations for text selected by aSelectionType
|
|
void PaintTextSelectionDecorations(const PaintTextSelectionParams& aParams,
|
|
const mozilla::UniquePtr<SelectionDetails>& aDetails,
|
|
SelectionType aSelectionType);
|
|
|
|
void DrawEmphasisMarks(gfxContext* aContext,
|
|
mozilla::WritingMode aWM,
|
|
const gfxPoint& aTextBaselinePt,
|
|
const gfxPoint& aFramePt,
|
|
Range aRange,
|
|
const nscolor* aDecorationOverrideColor,
|
|
PropertyProvider* aProvider);
|
|
|
|
nscolor GetCaretColorAt(int32_t aOffset) override;
|
|
|
|
int16_t GetSelectionStatus(int16_t* aSelectionFlags);
|
|
|
|
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 aRefDrawTarget the DrawTarget 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,
|
|
DrawTarget* aRefDrawTarget = 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);
|
|
bool IsInTextRunUserData() const
|
|
{
|
|
return GetStateBits() &
|
|
(TEXT_IN_TEXTRUN_USER_DATA | TEXT_IN_UNINFLATED_TEXTRUN_USER_DATA);
|
|
}
|
|
/**
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Wipe out references to textrun(s) without deleting the textruns.
|
|
*/
|
|
void DisconnectTextRuns();
|
|
|
|
// 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) const;
|
|
|
|
// Similar to Reflow(), but for use from nsLineLayout
|
|
void ReflowText(nsLineLayout& aLineLayout,
|
|
nscoord aAvailableWidth,
|
|
DrawTarget* aDrawTarget,
|
|
ReflowOutput& aMetrics,
|
|
nsReflowStatus& aStatus);
|
|
|
|
bool IsFloatingFirstLetterChild() const;
|
|
|
|
bool IsInitialLetterChild() const;
|
|
|
|
bool ComputeCustomOverflow(nsOverflowAreas& aOverflowAreas) override;
|
|
|
|
void AssignJustificationGaps(const mozilla::JustificationAssignment& aAssign);
|
|
mozilla::JustificationAssignment GetJustificationAssignment() const;
|
|
|
|
uint32_t CountGraphemeClusters() const;
|
|
|
|
protected:
|
|
virtual ~nsTextFrame();
|
|
|
|
RefPtr<gfxTextRun> mTextRun;
|
|
nsTextFrame* 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;
|
|
|
|
/**
|
|
* Return true if the frame is part of a Selection.
|
|
* Helper method to implement the public IsSelected() API.
|
|
*/
|
|
bool IsFrameSelected() const override;
|
|
|
|
mozilla::UniquePtr<SelectionDetails> GetSelectionDetails();
|
|
|
|
void UnionAdditionalOverflow(nsPresContext* aPresContext,
|
|
nsIFrame* aBlock,
|
|
PropertyProvider& aProvider,
|
|
nsRect* aVisualOverflowRect,
|
|
bool aIncludeTextDecorations);
|
|
|
|
// Update information of emphasis marks, and return the visial
|
|
// overflow rect of the emphasis marks.
|
|
nsRect UpdateTextEmphasis(mozilla::WritingMode aWM,
|
|
PropertyProvider& aProvider);
|
|
|
|
struct PaintShadowParams
|
|
{
|
|
gfxTextRun::Range range;
|
|
LayoutDeviceRect dirtyRect;
|
|
gfxPoint framePt;
|
|
gfxPoint textBaselinePt;
|
|
gfxContext* context;
|
|
nscolor foregroundColor = NS_RGBA(0, 0, 0, 0);
|
|
const nsCharClipDisplayItem::ClipEdges* clipEdges = nullptr;
|
|
PropertyProvider* provider = nullptr;
|
|
nscoord leftSideOffset = 0;
|
|
explicit PaintShadowParams(const PaintTextParams& aParams)
|
|
: dirtyRect(aParams.dirtyRect)
|
|
, framePt(aParams.framePt)
|
|
, context(aParams.context)
|
|
{
|
|
}
|
|
};
|
|
|
|
void PaintOneShadow(const PaintShadowParams& aParams,
|
|
nsCSSShadowItem* aShadowDetails,
|
|
gfxRect& aBoundingBox,
|
|
uint32_t aBlurFlags);
|
|
|
|
void PaintShadows(nsCSSShadowArray* aShadow,
|
|
const PaintShadowParams& aParams);
|
|
|
|
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
|
|
{
|
|
AutoTArray<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(Range aRange,
|
|
const gfxPoint& aTextBaselinePt,
|
|
const DrawTextRunParams& aParams);
|
|
|
|
void DrawTextRunAndDecorations(Range aRange,
|
|
const gfxPoint& aTextBaselinePt,
|
|
const DrawTextParams& aParams,
|
|
const TextDecorations& aDecorations);
|
|
|
|
void DrawText(Range aRange,
|
|
const gfxPoint& aTextBaselinePt,
|
|
const DrawTextParams& aParams);
|
|
|
|
// 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);
|
|
|
|
/**
|
|
* Utility methods to paint selection.
|
|
*/
|
|
void DrawSelectionDecorations(gfxContext* aContext,
|
|
const LayoutDeviceRect& aDirtyRect,
|
|
mozilla::SelectionType aSelectionType,
|
|
nsTextPaintStyle& aTextPaintStyle,
|
|
const TextRangeStyle& aRangeStyle,
|
|
const Point& aPt,
|
|
gfxFloat aICoordInFrame,
|
|
gfxFloat aWidth,
|
|
gfxFloat aAscent,
|
|
const gfxFont::Metrics& aFontMetrics,
|
|
DrawPathCallbacks* aCallbacks,
|
|
bool aVertical,
|
|
gfxFloat aDecorationOffsetDir,
|
|
uint8_t aDecoration);
|
|
|
|
struct PaintDecorationLineParams;
|
|
void PaintDecorationLine(const PaintDecorationLineParams& aParams);
|
|
/**
|
|
* ComputeDescentLimitForSelectionUnderline() computes the most far position
|
|
* where we can put selection underline.
|
|
*
|
|
* @return The maximum underline offset from the baseline (positive value
|
|
* means that the underline can put below the baseline).
|
|
*/
|
|
gfxFloat ComputeDescentLimitForSelectionUnderline(
|
|
nsPresContext* aPresContext,
|
|
const gfxFont::Metrics& aFontMetrics);
|
|
/**
|
|
* This function encapsulates all knowledge of how selections affect
|
|
* foreground and background colors.
|
|
* @param aForeground the foreground color to use
|
|
* @param aBackground the background color to use, or RGBA(0,0,0,0) if no
|
|
* background should be painted
|
|
* @return true if the selection affects colors, false otherwise
|
|
*/
|
|
static bool GetSelectionTextColors(SelectionType aSelectionType,
|
|
nsTextPaintStyle& aTextPaintStyle,
|
|
const TextRangeStyle& aRangeStyle,
|
|
nscolor* aForeground,
|
|
nscolor* aBackground);
|
|
/**
|
|
* ComputeSelectionUnderlineHeight() computes selection underline height of
|
|
* the specified selection type from the font metrics.
|
|
*/
|
|
static gfxFloat ComputeSelectionUnderlineHeight(
|
|
nsPresContext* aPresContext,
|
|
const gfxFont::Metrics& aFontMetrics,
|
|
SelectionType aSelectionType);
|
|
|
|
ContentOffsets GetCharacterOffsetAtFramePointInternal(
|
|
nsPoint aPoint,
|
|
bool aForInsertionPoint);
|
|
|
|
void ClearFrameOffsetCache();
|
|
|
|
bool HasAnyNoncollapsedCharacters() override;
|
|
|
|
void ClearMetrics(ReflowOutput& aMetrics);
|
|
|
|
/**
|
|
* UpdateIteratorFromOffset() updates the iterator from a given offset.
|
|
* Also, aInOffset may be updated to cluster start if aInOffset isn't
|
|
* the offset of cluster start.
|
|
*/
|
|
void UpdateIteratorFromOffset(const PropertyProvider& aProperties,
|
|
int32_t& aInOffset,
|
|
gfxSkipCharsIterator& aIter);
|
|
|
|
nsPoint GetPointFromIterator(const gfxSkipCharsIterator& aIter,
|
|
PropertyProvider& aProperties);
|
|
};
|
|
|
|
#endif
|