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* (C) 1999 Lars Knoll (
* (C) 2000 Dirk Mueller (
* Copyright (C) 2004, 2005, 2006, 2009, 2010, 2011 Apple Inc. All rights reserved.
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#ifndef InlineTextBox_h
#define InlineTextBox_h
#include "core/rendering/InlineBox.h"
#include "core/rendering/RenderText.h" // so textRenderer() can be inline
#include "platform/graphics/TextRun.h"
#include "wtf/Forward.h"
namespace WebCore {
struct CompositionUnderline;
class DocumentMarker;
const unsigned short cNoTruncation = USHRT_MAX;
const unsigned short cFullTruncation = USHRT_MAX - 1;
// Helper functions shared by InlineTextBox / SVGRootInlineBox
void updateGraphicsContext(GraphicsContext*, const Color& fillColor, const Color& strokeColor, float strokeThickness, ColorSpace);
Color correctedTextColor(Color textColor, Color backgroundColor);
class InlineTextBox : public InlineBox {
InlineTextBox(RenderObject* obj)
: InlineBox(obj)
, m_prevTextBox(0)
, m_nextTextBox(0)
, m_start(0)
, m_len(0)
, m_truncation(cNoTruncation)
virtual void destroy() OVERRIDE FINAL;
InlineTextBox* prevTextBox() const { return m_prevTextBox; }
InlineTextBox* nextTextBox() const { return m_nextTextBox; }
void setNextTextBox(InlineTextBox* n) { m_nextTextBox = n; }
void setPreviousTextBox(InlineTextBox* p) { m_prevTextBox = p; }
// FIXME: These accessors should ASSERT(!isDirty()). See
unsigned start() const { return m_start; }
unsigned end() const { return m_len ? m_start + m_len - 1 : m_start; }
unsigned len() const { return m_len; }
void setStart(unsigned start) { m_start = start; }
void setLen(unsigned len) { m_len = len; }
void offsetRun(int d) { ASSERT(!isDirty()); m_start += d; }
unsigned short truncation() { return m_truncation; }
virtual void markDirty(bool dirty = true) OVERRIDE FINAL;
using InlineBox::hasHyphen;
using InlineBox::setHasHyphen;
using InlineBox::canHaveLeadingExpansion;
using InlineBox::setCanHaveLeadingExpansion;
static inline bool compareByStart(const InlineTextBox* first, const InlineTextBox* second) { return first->start() < second->start(); }
virtual int baselinePosition(FontBaseline) const OVERRIDE FINAL;
virtual LayoutUnit lineHeight() const OVERRIDE FINAL;
bool getEmphasisMarkPosition(RenderStyle*, TextEmphasisPosition&) const;
LayoutRect logicalOverflowRect() const;
void setLogicalOverflowRect(const LayoutRect&);
LayoutUnit logicalTopVisualOverflow() const { return logicalOverflowRect().y(); }
LayoutUnit logicalBottomVisualOverflow() const { return logicalOverflowRect().maxY(); }
LayoutUnit logicalLeftVisualOverflow() const { return logicalOverflowRect().x(); }
LayoutUnit logicalRightVisualOverflow() const { return logicalOverflowRect().maxX(); }
#ifndef NDEBUG
virtual void showBox(int = 0) const;
virtual const char* boxName() const;
LayoutUnit selectionTop();
LayoutUnit selectionBottom();
LayoutUnit selectionHeight();
// charactersWithHyphen, if provided, must not be destroyed before the TextRun.
TextRun constructTextRun(RenderStyle*, const Font&, StringBuilder* charactersWithHyphen = 0) const;
TextRun constructTextRun(RenderStyle*, const Font&, StringView, int maximumLength, StringBuilder* charactersWithHyphen = 0) const;
TextRun constructTextRunForInspector(RenderStyle*, const Font&) const;
virtual FloatRect calculateBoundaries() const { return FloatRect(x(), y(), width(), height()); }
virtual LayoutRect localSelectionRect(int startPos, int endPos);
bool isSelected(int startPos, int endPos) const;
void selectionStartEnd(int& sPos, int& ePos);
virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom);
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE;
RenderText* textRenderer() const;
virtual void deleteLine() OVERRIDE FINAL;
virtual void extractLine() OVERRIDE FINAL;
virtual void attachLine() OVERRIDE FINAL;
virtual RenderObject::SelectionState selectionState() OVERRIDE FINAL;
virtual void clearTruncation() OVERRIDE FINAL { m_truncation = cNoTruncation; }
virtual float placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) OVERRIDE FINAL;
virtual bool isLineBreak() const OVERRIDE FINAL;
void setExpansion(int newExpansion)
m_logicalWidth -= expansion();
m_logicalWidth += newExpansion;
virtual bool isInlineTextBox() const OVERRIDE FINAL { return true; }
virtual int caretMinOffset() const OVERRIDE FINAL;
virtual int caretMaxOffset() const OVERRIDE FINAL;
float textPos() const; // returns the x position relative to the left start of the text line.
virtual int offsetForPosition(float x, bool includePartialGlyphs = true) const;
virtual float positionForOffset(int offset) const;
bool containsCaretOffset(int offset) const; // false for offset after line break
// Fills a vector with the pixel width of each character.
void characterWidths(Vector<float>&) const;
InlineTextBox* m_prevTextBox; // The previous box that also uses our RenderObject
InlineTextBox* m_nextTextBox; // The next box that also uses our RenderObject
int m_start;
unsigned short m_len;
unsigned short m_truncation; // Where to truncate when text overflow is applied. We use special constants to
// denote no truncation (the whole run paints) and full truncation (nothing paints at all).
void paintCompositionBackground(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, int startPos, int endPos);
void paintDocumentMarkers(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, bool background);
void paintCompositionUnderline(GraphicsContext*, const FloatPoint& boxOrigin, const CompositionUnderline&);
void paintDecoration(GraphicsContext*, const FloatPoint& boxOrigin, TextDecoration, TextDecorationStyle, const ShadowList*);
void paintSelection(GraphicsContext*, const FloatPoint& boxOrigin, RenderStyle*, const Font&, Color textColor);
void paintDocumentMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&, bool grammar);
void paintTextMatchMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, RenderStyle*, const Font&);
TextRun::ExpansionBehavior expansionBehavior() const
return (canHaveLeadingExpansion() ? TextRun::AllowLeadingExpansion : TextRun::ForbidLeadingExpansion)
| (expansion() && nextLeafChild() ? TextRun::AllowTrailingExpansion : TextRun::ForbidTrailingExpansion);
inline InlineTextBox* toInlineTextBox(InlineBox* inlineBox)
ASSERT_WITH_SECURITY_IMPLICATION(!inlineBox || inlineBox->isInlineTextBox());
return static_cast<InlineTextBox*>(inlineBox);
inline const InlineTextBox* toInlineTextBox(const InlineBox* inlineBox)
ASSERT_WITH_SECURITY_IMPLICATION(!inlineBox || inlineBox->isInlineTextBox());
return static_cast<const InlineTextBox*>(inlineBox);
// This will catch anyone doing an unnecessary cast.
void toInlineTextBox(const InlineTextBox*);
inline RenderText* InlineTextBox::textRenderer() const
return toRenderText(renderer());
void alignSelectionRectToDevicePixels(FloatRect&);
} // namespace WebCore
#endif // InlineTextBox_h