blob: 0fae8159d73daae6f091f42bc956706447b2994f [file] [log] [blame]
/*
* This file is part of the DOM implementation for KDE.
*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007 Apple Computer, Inc.
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#ifndef RenderText_h
#define RenderText_h
#include "RenderObject.h"
#include "Text.h"
namespace WebCore {
// Define a constant for soft hyphen's unicode value.
const unsigned short SOFT_HYPHEN = 173;
class DocumentMarker;
class InlineBox;
class InlineTextBox;
class Position;
class String;
class StringImpl;
class RenderText : public RenderObject {
friend class InlineTextBox;
public:
RenderText(Node*, StringImpl*);
virtual const char* renderName() const { return "RenderText"; }
virtual bool isTextFragment() const { return false; }
virtual PassRefPtr<StringImpl> originalString() const;
virtual void setStyle(RenderStyle*);
void extractTextBox(InlineTextBox*);
void attachTextBox(InlineTextBox*);
void removeTextBox(InlineTextBox*);
void deleteTextBoxes();
virtual void destroy();
String data() const { return m_str.get(); }
StringImpl* string() const { return m_str.get(); }
virtual InlineBox* createInlineBox(bool,bool, bool isOnlyRun = false);
virtual void dirtyLineBoxes(bool fullLayout, bool isRootInlineBox = false);
virtual void paint(PaintInfo&, int tx, int ty) { ASSERT_NOT_REACHED(); }
virtual void layout() { ASSERT_NOT_REACHED(); }
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction) { ASSERT_NOT_REACHED(); return false; }
virtual void absoluteRects(Vector<IntRect>&, int tx, int ty);
virtual void addLineBoxRects(Vector<IntRect>&, unsigned startOffset = 0, unsigned endOffset = UINT_MAX);
virtual VisiblePosition positionForCoordinates(int x, int y);
virtual unsigned length() const { return m_str->length(); }
const UChar* text() const { return m_str->characters(); }
unsigned stringLength() const { return m_str->length(); } // non virtual implementation of length()
virtual void position(InlineBox*);
virtual unsigned width(unsigned from, unsigned len, const Font*, int xPos) const;
virtual unsigned width(unsigned from, unsigned len, int xPos, bool firstLine = false) const;
virtual int width() const;
virtual int height() const;
virtual short lineHeight(bool firstLine, bool isRootLineBox = false) const;
// overrides
virtual void calcMinMaxWidth();
virtual int minWidth() const { return m_minWidth; }
virtual int maxWidth() const { return m_maxWidth; }
// widths
void calcMinMaxWidth(int leadWidth);
virtual void trimmedMinMaxWidth(int leadWidth,
int& beginMinW, bool& beginWS,
int& endMinW, bool& endWS,
bool& hasBreakableChar, bool& hasBreak,
int& beginMaxW, int& endMaxW,
int& minW, int& maxW, bool& stripFrontSpaces);
bool containsOnlyWhitespace(unsigned from, unsigned len) const;
// returns the minimum x position of all runs relative to the parent.
// defaults to 0.
int minXPos() const;
virtual int xPos() const;
virtual int yPos() const;
virtual const Font& font();
virtual short verticalPositionHint(bool firstLine) const;
void setText(PassRefPtr<StringImpl>, bool force = false);
void setTextWithOffset(PassRefPtr<StringImpl>, unsigned offset, unsigned len, bool force = false);
virtual bool canBeSelectionLeaf() const { return true; }
virtual SelectionState selectionState() const { return static_cast<SelectionState>(m_selectionState); }
virtual void setSelectionState(SelectionState s);
virtual IntRect selectionRect();
virtual IntRect caretRect(int offset, EAffinity, int* extraWidthToEndOfLine = 0);
virtual int marginLeft() const { return style()->marginLeft().calcMinValue(0); }
virtual int marginRight() const { return style()->marginRight().calcMinValue(0); }
virtual IntRect getAbsoluteRepaintRect();
const Font* font(bool firstLine) const;
Text* element() const { return static_cast<Text*>(RenderObject::element()); }
InlineTextBox* firstTextBox() const { return m_firstTextBox; }
InlineTextBox* lastTextBox() const { return m_lastTextBox; }
virtual InlineBox* inlineBox(int offset, EAffinity = UPSTREAM);
virtual int caretMinOffset() const;
virtual int caretMaxOffset() const;
virtual unsigned caretMaxRenderedOffset() const;
virtual int previousOffset(int current) const;
virtual int nextOffset(int current) const;
bool containsReversedText() const { return m_containsReversedText; }
InlineTextBox* findNextInlineTextBox(int offset, int& pos) const;
protected:
void setInternalString(PassRefPtr<StringImpl>);
private:
void cacheWidths();
int widthFromCache(const Font*, int start, int len, int tabWidth, int xPos) const;
bool shouldUseMonospaceCache(const Font*) const;
bool allAscii() const;
// members
RefPtr<StringImpl> m_str;
InlineTextBox* m_firstTextBox;
InlineTextBox* m_lastTextBox;
int m_minWidth;
int m_maxWidth;
int m_beginMinWidth;
int m_endMinWidth;
unsigned m_selectionState : 3; // enums on Windows are signed, so this needs to be unsigned to prevent it turning negative.
bool m_hasBreakableChar : 1; // Whether or not we can be broken into multiple lines.
bool m_hasBreak : 1; // Whether or not we have a hard break (e.g., <pre> with '\n').
bool m_hasTab : 1; // Whether or not we have a variable width tab character (e.g., <pre> with '\t').
bool m_hasBeginWS : 1; // Whether or not we begin with WS (only true if we aren't pre)
bool m_hasEndWS : 1; // Whether or not we end with WS (only true if we aren't pre)
bool m_linesDirty : 1; // This bit indicates that the text run has already dirtied specific
// line boxes, and this hint will enable layoutInlineChildren to avoid
// just dirtying everything when character data is modified (e.g., appended/inserted
// or removed).
bool m_containsReversedText : 1;
// 22 bits left
mutable bool m_allAsciiChecked:1;
mutable bool m_allAscii:1;
int m_monospaceCharacterWidth;
};
} // namespace WebCore
#endif // RenderText_h