/* | |
* Copyright (C) 2003, 2004, 2005, 2006, 2007 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 InlineBox_h | |
#define InlineBox_h | |
#include "RenderBoxModelObject.h" | |
#include "TextDirection.h" | |
namespace WebCore { | |
class HitTestRequest; | |
class HitTestResult; | |
class RootInlineBox; | |
// InlineBox represents a rectangle that occurs on a line. It corresponds to | |
// some RenderObject (i.e., it represents a portion of that RenderObject). | |
class InlineBox { | |
public: | |
InlineBox(RenderObject* obj) | |
: m_next(0) | |
, m_prev(0) | |
, m_parent(0) | |
, m_renderer(obj) | |
, m_x(0) | |
, m_y(0) | |
, m_width(0) | |
, m_firstLine(false) | |
, m_constructed(false) | |
, m_bidiEmbeddingLevel(0) | |
, m_dirty(false) | |
, m_extracted(false) | |
#if ENABLE(SVG) | |
, m_hasVirtualHeight(false) | |
#endif | |
, m_endsWithBreak(false) | |
, m_hasSelectedChildren(false) | |
, m_hasEllipsisBox(false) | |
, m_dirOverride(false) | |
, m_isText(false) | |
, m_determinedIfNextOnLineExists(false) | |
, m_determinedIfPrevOnLineExists(false) | |
, m_nextOnLineExists(false) | |
, m_prevOnLineExists(false) | |
, m_toAdd(0) | |
#ifndef NDEBUG | |
, m_hasBadParent(false) | |
#endif | |
{ | |
} | |
InlineBox(RenderObject* obj, int x, int y, int width, bool firstLine, bool constructed, | |
bool dirty, bool extracted, InlineBox* next, InlineBox* prev, InlineFlowBox* parent) | |
: m_next(next) | |
, m_prev(prev) | |
, m_parent(parent) | |
, m_renderer(obj) | |
, m_x(x) | |
, m_y(y) | |
, m_width(width) | |
, m_firstLine(firstLine) | |
, m_constructed(constructed) | |
, m_bidiEmbeddingLevel(0) | |
, m_dirty(dirty) | |
, m_extracted(extracted) | |
#if ENABLE(SVG) | |
, m_hasVirtualHeight(false) | |
#endif | |
, m_endsWithBreak(false) | |
, m_hasSelectedChildren(false) | |
, m_hasEllipsisBox(false) | |
, m_dirOverride(false) | |
, m_isText(false) | |
, m_determinedIfNextOnLineExists(false) | |
, m_determinedIfPrevOnLineExists(false) | |
, m_nextOnLineExists(false) | |
, m_prevOnLineExists(false) | |
, m_toAdd(0) | |
#ifndef NDEBUG | |
, m_hasBadParent(false) | |
#endif | |
{ | |
} | |
virtual ~InlineBox(); | |
virtual void destroy(RenderArena*); | |
virtual void deleteLine(RenderArena*); | |
virtual void extractLine(); | |
virtual void attachLine(); | |
virtual bool isLineBreak() const { return false; } | |
virtual void adjustPosition(int dx, int dy); | |
virtual void paint(RenderObject::PaintInfo&, int tx, int ty); | |
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty); | |
// Overloaded new operator. | |
void* operator new(size_t, RenderArena*) throw(); | |
// Overridden to prevent the normal delete from being called. | |
void operator delete(void*, size_t); | |
private: | |
// The normal operator new is disallowed. | |
void* operator new(size_t) throw(); | |
public: | |
#ifndef NDEBUG | |
void showTreeForThis() const; | |
#endif | |
bool isText() const { return m_isText; } | |
void setIsText(bool b) { m_isText = b; } | |
virtual bool isInlineBox() { return false; } | |
virtual bool isInlineFlowBox() const { return false; } | |
virtual bool isInlineTextBox() { return false; } | |
virtual bool isRootInlineBox() const { return false; } | |
#if ENABLE(SVG) | |
virtual bool isSVGRootInlineBox() { return false; } | |
bool hasVirtualHeight() const { return m_hasVirtualHeight; } | |
void setHasVirtualHeight() { m_hasVirtualHeight = true; } | |
virtual int virtualHeight() const { ASSERT_NOT_REACHED(); return 0; } | |
#endif | |
bool isConstructed() { return m_constructed; } | |
virtual void setConstructed() | |
{ | |
m_constructed = true; | |
if (m_next) | |
m_next->setConstructed(); | |
} | |
void setExtracted(bool b = true) { m_extracted = b; } | |
void setFirstLineStyleBit(bool f) { m_firstLine = f; } | |
bool isFirstLineStyle() const { return m_firstLine; } | |
void remove(); | |
InlineBox* nextOnLine() const { return m_next; } | |
InlineBox* prevOnLine() const { return m_prev; } | |
void setNextOnLine(InlineBox* next) | |
{ | |
ASSERT(m_parent || !next); | |
m_next = next; | |
} | |
void setPrevOnLine(InlineBox* prev) | |
{ | |
ASSERT(m_parent || !prev); | |
m_prev = prev; | |
} | |
bool nextOnLineExists() const; | |
bool prevOnLineExists() const; | |
virtual bool isLeaf() const { return true; } | |
InlineBox* nextLeafChild() const; | |
InlineBox* prevLeafChild() const; | |
RenderObject* renderer() const { return m_renderer; } | |
InlineFlowBox* parent() const | |
{ | |
ASSERT(!m_hasBadParent); | |
return m_parent; | |
} | |
void setParent(InlineFlowBox* par) { m_parent = par; } | |
const RootInlineBox* root() const; | |
RootInlineBox* root(); | |
void setWidth(int w) { m_width = w; } | |
int width() const { return m_width; } | |
// x() is the left side of the box in the parent's coordinate system. | |
void setX(int x) { m_x = x; } | |
int x() const { return m_x; } | |
// y() is the top of the box in the parent's coordinate system. | |
void setY(int y) { m_y = y; } | |
int y() const { return m_y; } | |
int height() const; | |
inline int baselinePosition(bool isRootLineBox) const { return renderer()->baselinePosition(m_firstLine, isRootLineBox); } | |
inline int lineHeight(bool isRootLineBox) const { return renderer()->lineHeight(m_firstLine, isRootLineBox); } | |
virtual int caretMinOffset() const; | |
virtual int caretMaxOffset() const; | |
virtual unsigned caretMaxRenderedOffset() const; | |
unsigned char bidiLevel() const { return m_bidiEmbeddingLevel; } | |
void setBidiLevel(unsigned char level) { m_bidiEmbeddingLevel = level; } | |
TextDirection direction() const { return m_bidiEmbeddingLevel % 2 ? RTL : LTR; } | |
int caretLeftmostOffset() const { return direction() == LTR ? caretMinOffset() : caretMaxOffset(); } | |
int caretRightmostOffset() const { return direction() == LTR ? caretMaxOffset() : caretMinOffset(); } | |
virtual void clearTruncation() { } | |
bool isDirty() const { return m_dirty; } | |
void markDirty(bool dirty = true) { m_dirty = dirty; } | |
void dirtyLineBoxes(); | |
virtual RenderObject::SelectionState selectionState(); | |
virtual bool canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth); | |
// visibleLeftEdge, visibleRightEdge are in the parent's coordinate system. | |
virtual int placeEllipsisBox(bool ltr, int visibleLeftEdge, int visibleRightEdge, int ellipsisWidth, bool&); | |
void setHasBadParent(); | |
int toAdd() const { return m_toAdd; } | |
bool visibleToHitTesting() const { return renderer()->style()->visibility() == VISIBLE && renderer()->style()->pointerEvents() != PE_NONE; } | |
// Use with caution! The type is not checked! | |
RenderBoxModelObject* boxModelObject() const | |
{ | |
if (!m_renderer->isText()) | |
return toRenderBoxModelObject(m_renderer); | |
return 0; | |
} | |
private: | |
InlineBox* m_next; // The next element on the same line as us. | |
InlineBox* m_prev; // The previous element on the same line as us. | |
InlineFlowBox* m_parent; // The box that contains us. | |
public: | |
RenderObject* m_renderer; | |
int m_x; | |
int m_y; | |
int m_width; | |
// Some of these bits are actually for subclasses and moved here to compact the structures. | |
// for this class | |
protected: | |
bool m_firstLine : 1; | |
private: | |
bool m_constructed : 1; | |
unsigned char m_bidiEmbeddingLevel : 6; | |
protected: | |
bool m_dirty : 1; | |
bool m_extracted : 1; | |
bool m_hasVirtualHeight : 1; | |
// for RootInlineBox | |
bool m_endsWithBreak : 1; // Whether the line ends with a <br>. | |
bool m_hasSelectedChildren : 1; // Whether we have any children selected (this bit will also be set if the <br> that terminates our line is selected). | |
bool m_hasEllipsisBox : 1; | |
// for InlineTextBox | |
public: | |
bool m_dirOverride : 1; | |
bool m_isText : 1; // Whether or not this object represents text with a non-zero height. Includes non-image list markers, text boxes. | |
protected: | |
mutable bool m_determinedIfNextOnLineExists : 1; | |
mutable bool m_determinedIfPrevOnLineExists : 1; | |
mutable bool m_nextOnLineExists : 1; | |
mutable bool m_prevOnLineExists : 1; | |
int m_toAdd : 12; // for justified text | |
#ifndef NDEBUG | |
private: | |
bool m_hasBadParent; | |
#endif | |
}; | |
#ifdef NDEBUG | |
inline InlineBox::~InlineBox() | |
{ | |
} | |
#endif | |
inline void InlineBox::setHasBadParent() | |
{ | |
#ifndef NDEBUG | |
m_hasBadParent = true; | |
#endif | |
} | |
} // namespace WebCore | |
#ifndef NDEBUG | |
// Outside the WebCore namespace for ease of invocation from gdb. | |
void showTree(const WebCore::InlineBox*); | |
#endif | |
#endif // InlineBox_h |