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/*
* 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 "RenderObject.h" // needed for RenderObject::PaintInfo
#include "TextDirection.h"
namespace WebCore {
class HitTestResult;
class RootInlineBox;
struct HitTestRequest;
// 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_object(obj)
, m_x(0)
, m_y(0)
, m_width(0)
, m_height(0)
, m_baseline(0)
, m_next(0)
, m_prev(0)
, m_parent(0)
, m_firstLine(false)
, m_constructed(false)
, m_bidiEmbeddingLevel(0)
, m_dirty(false)
, m_extracted(false)
, m_includeLeftEdge(false)
, m_includeRightEdge(false)
, m_hasTextChildren(true)
, m_endsWithBreak(false)
, m_hasSelectedChildren(false)
, m_hasEllipsisBox(false)
, m_dirOverride(false)
, m_treatAsText(true)
, 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, int height, int baseline, bool firstLine, bool constructed,
bool dirty, bool extracted, InlineBox* next, InlineBox* prev, InlineFlowBox* parent)
: m_object(obj)
, m_x(x)
, m_y(y)
, m_width(width)
, m_height(height)
, m_baseline(baseline)
, m_next(next)
, m_prev(prev)
, m_parent(parent)
, m_firstLine(firstLine)
, m_constructed(constructed)
, m_bidiEmbeddingLevel(0)
, m_dirty(dirty)
, m_extracted(extracted)
, m_includeLeftEdge(false)
, m_includeRightEdge(false)
, m_hasTextChildren(true)
, m_endsWithBreak(false)
, m_hasSelectedChildren(false)
, m_hasEllipsisBox(false)
, m_dirOverride(false)
, m_treatAsText(true)
, 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
virtual bool isInlineBox() { return false; }
virtual bool isInlineFlowBox() { return false; }
virtual bool isContainer() { return false; }
virtual bool isInlineTextBox() { return false; }
virtual bool isRootInlineBox() { return false; }
#if ENABLE(SVG)
virtual bool isSVGRootInlineBox() { return false; }
#endif
virtual bool isText() const { return false; }
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 InlineBox* firstLeafChild();
virtual InlineBox* lastLeafChild();
InlineBox* nextLeafChild();
InlineBox* prevLeafChild();
RenderObject* object() const { return m_object; }
InlineFlowBox* parent() const
{
ASSERT(!m_hasBadParent);
return m_parent;
}
void setParent(InlineFlowBox* par) { m_parent = par; }
RootInlineBox* root();
void setWidth(int w) { m_width = w; }
int width() const { return m_width; }
void setXPos(int x) { m_x = x; }
int xPos() const { return m_x; }
void setYPos(int y) { m_y = y; }
int yPos() const { return m_y; }
void setHeight(int h) { m_height = h; }
int height() const { return m_height; }
void setBaseline(int b) { m_baseline = b; }
int baseline() const { return m_baseline; }
bool hasTextChildren() const { return m_hasTextChildren; }
virtual int topOverflow() { return yPos(); }
virtual int bottomOverflow() { return yPos() + height(); }
virtual int leftOverflow() { return xPos(); }
virtual int rightOverflow() { return xPos() + width(); }
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);
virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool&);
void setHasBadParent();
int toAdd() const { return m_toAdd; }
public:
RenderObject* m_object;
int m_x;
int m_y;
int m_width;
int m_height;
int m_baseline;
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.
// 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;
// for InlineFlowBox
bool m_includeLeftEdge : 1;
bool m_includeRightEdge : 1;
bool m_hasTextChildren : 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_treatAsText : 1; // Whether or not to treat a <br> as text for the purposes of line height.
protected:
mutable bool m_determinedIfNextOnLineExists : 1;
mutable bool m_determinedIfPrevOnLineExists : 1;
mutable bool m_nextOnLineExists : 1;
mutable bool m_prevOnLineExists : 1;
int m_toAdd : 13; // 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
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