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/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2009, 2010, 2011, 2014 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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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 "InlineBox.h"
#include "RenderText.h"
#include "TextRun.h"
namespace WebCore {
struct CompositionUnderline;
class DocumentMarker;
class TextPainter;
const unsigned short cNoTruncation = USHRT_MAX;
const unsigned short cFullTruncation = USHRT_MAX - 1;
class InlineTextBox : public InlineBox {
public:
explicit InlineTextBox(RenderText& renderer)
: InlineBox(renderer)
, m_prevTextBox(0)
, m_nextTextBox(0)
, m_start(0)
, m_len(0)
, m_truncation(cNoTruncation)
{
setBehavesLikeText(true);
}
virtual ~InlineTextBox();
RenderText& renderer() const { return toRenderText(InlineBox::renderer()); }
const RenderStyle& lineStyle() const { return isFirstLine() ? renderer().firstLineStyle() : renderer().style(); }
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 https://bugs.webkit.org/show_bug.cgi?id=97264
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() const { 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 emphasisMarkExistsAndIsAbove(const RenderStyle&, bool& isAbove) 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(); }
virtual void dirtyOwnLineBoxes() { dirtyLineBoxes(); }
#ifndef NDEBUG
virtual void showLineBox(bool mark, int depth) const override final;
virtual const char* boxName() const override final;
#endif
private:
LayoutUnit selectionTop() const;
LayoutUnit selectionBottom() const;
LayoutUnit selectionHeight() const;
TextRun constructTextRun(const RenderStyle&, const Font&, String* hyphenatedStringBuffer = nullptr) const;
TextRun constructTextRun(const RenderStyle&, const Font&, String, unsigned maximumLength, String* hyphenatedStringBuffer = nullptr) const;
public:
virtual FloatRect calculateBoundaries() const { return FloatRect(x(), y(), width(), height()); }
virtual LayoutRect localSelectionRect(int startPos, int endPos) const;
bool isSelected(int startPos, int endPos) const;
void selectionStartEnd(int& sPos, int& ePos);
protected:
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;
private:
virtual void deleteLine() override final;
virtual void extractLine() override final;
virtual void attachLine() override final;
public:
virtual RenderObject::SelectionState selectionState() override final;
private:
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;
public:
virtual bool isLineBreak() const override final;
void setExpansion(int newExpansion)
{
m_logicalWidth -= expansion();
InlineBox::setExpansion(newExpansion);
m_logicalWidth += newExpansion;
}
private:
virtual bool isInlineTextBox() const override final { return true; }
public:
virtual int caretMinOffset() const override final;
virtual int caretMaxOffset() const override final;
private:
float textPos() const; // returns the x position relative to the left start of the text line.
public:
virtual int offsetForPosition(float x, bool includePartialGlyphs = true) const;
virtual float positionForOffset(int offset) const;
protected:
void paintCompositionBackground(GraphicsContext*, const FloatPoint& boxOrigin, const RenderStyle&, const Font&, int startPos, int endPos);
void paintDocumentMarkers(GraphicsContext*, const FloatPoint& boxOrigin, const RenderStyle&, const Font&, bool background);
void paintCompositionUnderline(GraphicsContext*, const FloatPoint& boxOrigin, const CompositionUnderline&);
private:
void paintDecoration(GraphicsContext&, const FloatPoint& boxOrigin, TextDecoration, TextDecorationStyle, const ShadowData*, TextPainter&);
void paintSelection(GraphicsContext*, const FloatPoint& boxOrigin, const RenderStyle&, const Font&, Color textColor);
void paintDocumentMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, const RenderStyle&, const Font&, bool grammar);
void paintTextMatchMarker(GraphicsContext*, const FloatPoint& boxOrigin, DocumentMarker*, const RenderStyle&, const Font&);
void computeRectForReplacementMarker(DocumentMarker*, const RenderStyle&, const Font&);
TextRun::ExpansionBehavior expansionBehavior() const
{
return (canHaveLeadingExpansion() ? TextRun::AllowLeadingExpansion : TextRun::ForbidLeadingExpansion)
| (expansion() && nextLeafChild() && !nextLeafChild()->isLineBreak() ? TextRun::AllowTrailingExpansion : TextRun::ForbidTrailingExpansion);
}
void behavesLikeText() const = delete;
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;
// 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).
unsigned short m_truncation;
};
INLINE_BOX_OBJECT_TYPE_CASTS(InlineTextBox, isInlineTextBox())
} // namespace WebCore
#endif // InlineTextBox_h
|
