/* * 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 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 "dom/dom_string.h" #include "xml/dom_stringimpl.h" #include "xml/dom_textimpl.h" #include "rendering/render_object.h" #include "rendering/render_flow.h" #include #include #include "KWQKHTMLPart.h" class QPainter; class QFontMetrics; namespace DOM { class Position; class DocumentMarker; }; // Define a constant for soft hyphen's unicode value. #define SOFT_HYPHEN 173 const int cNoTruncation = -1; const int cFullTruncation = -2; namespace khtml { class RenderText; class RenderStyle; class InlineTextBox : public InlineRunBox { public: InlineTextBox(RenderObject* obj) :InlineRunBox(obj) { m_start = 0; m_len = 0; m_reversed = false; m_treatAsText = true; m_toAdd = 0; m_truncation = cNoTruncation; } InlineTextBox* nextTextBox() const { return static_cast(nextLineBox()); } InlineTextBox* prevTextBox() const { return static_cast(prevLineBox()); } uint start() const { return m_start; } uint end() const { return m_len ? m_start+m_len-1 : m_start; } uint len() const { return m_len; } void offsetRun(int d) { m_start += d; } void detach(RenderArena* arena); QRect selectionRect(int absx, int absy, int startPos, int endPos); bool isSelected(int startPos, int endPos) const; void selectionStartEnd(int& sPos, int& ePos); virtual void paint(RenderObject::PaintInfo& i, int tx, int ty); virtual bool nodeAtPoint(RenderObject::NodeInfo& i, int x, int y, int tx, int ty); RenderText* textObject(); virtual void deleteLine(RenderArena* arena); virtual void extractLine(); virtual void attachLine(); virtual RenderObject::SelectionState selectionState(); virtual void clearTruncation() { m_truncation = cNoTruncation; } virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox); // Overloaded new operator. Derived classes must override operator new // in order to allocate out of the RenderArena. void* operator new(size_t sz, RenderArena* renderArena) throw(); // Overridden to prevent the normal delete from being called. void operator delete(void* ptr, size_t sz); // Current used only for sorting, == could be made more robust if needed bool operator ==(const InlineTextBox &b) { return m_start == b.m_start; } bool operator <(const InlineTextBox &b) { return m_start < b.m_start; } private: // The normal operator new is disallowed. void* operator new(size_t sz) throw(); public: void setSpaceAdd(int add) { m_width -= m_toAdd; m_toAdd = add; m_width += m_toAdd; } int spaceAdd() { return m_toAdd; } virtual bool isInlineTextBox() { return true; } virtual bool isText() const { return m_treatAsText; } void setIsText(bool b) { m_treatAsText = b; } void paintDecoration(QPainter* p, int _tx, int _ty, int decoration); void paintSelection(QPainter* p, int tx, int ty, RenderStyle* style, const Font* font); void paintMarkedTextBackground(QPainter* p, int tx, int ty, RenderStyle* style, const Font* font, int startPos, int endPos); void paintMarker(QPainter* p, int _tx, int _ty, DOM::DocumentMarker marker); void paintMarkedTextUnderline(QPainter *pt, int _tx, int _ty, KWQKHTMLPart::MarkedTextUnderline underline); virtual long caretMinOffset() const; virtual long caretMaxOffset() const; virtual unsigned long caretMaxRenderedOffset() const; int textPos() const; int offsetForPosition(int _x, bool includePartialGlyphs = true); /** * if this text run was rendered @ref _ty pixels below the upper edge * of a view, would the @ref _y -coordinate be inside the vertical range * of this object's representation? */ bool checkVerticalPoint(int _y, int _ty, int _h); int m_start; unsigned short m_len; int 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). bool m_reversed : 1; bool m_treatAsText : 1; // Whether or not to treat a
as text for the purposes of line height. int m_toAdd : 14; // for justified text private: friend class RenderText; }; class RenderText : public RenderObject { friend class InlineTextBox; public: RenderText(DOM::NodeImpl* node, DOM::DOMStringImpl *_str); virtual ~RenderText(); virtual bool isTextFragment() const; virtual DOM::DOMStringImpl* originalString() const; virtual const char *renderName() const { return "RenderText"; } virtual void setStyle(RenderStyle *style); void extractTextBox(InlineTextBox* textBox); void attachTextBox(InlineTextBox* textBox); void removeTextBox(InlineTextBox* textBox); void deleteTextBoxes(); virtual void detach(); DOM::DOMString data() const { return str; } DOM::DOMStringImpl *string() const { return str; } virtual InlineBox* createInlineBox(bool,bool, bool isOnlyRun = false); virtual void dirtyLineBoxes(bool fullLayout, bool isRootInlineBox = false); virtual void paint(PaintInfo& i, int tx, int ty) { assert(false); } virtual void layout() { assert(false); } virtual bool nodeAtPoint(NodeInfo& info, int x, int y, int tx, int ty, HitTestAction hitTestAction) { assert(false); return false; } virtual void absoluteRects(QValueList& rects, int _tx, int _ty); virtual VisiblePosition positionForCoordinates(int x, int y); unsigned int length() const { return str->l; } QChar *text() const { return str->s; } unsigned int stringLength() const { return str->l; } // non virtual implementation of length() virtual void position(InlineBox* box, int from, int len, bool reverse); virtual unsigned int width(unsigned int from, unsigned int len, const Font *f, int xpos) const; virtual unsigned int width(unsigned int from, unsigned int len, int xpos, bool firstLine = false) const; virtual int width() const; virtual int height() const; // height of the contents (without paddings, margins and borders) virtual short lineHeight( bool firstLine, bool isRootLineBox=false ) const; virtual short baselinePosition( 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 int from, unsigned int 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 QFont &font(); virtual short verticalPositionHint( bool firstLine ) const; void setText(DOM::DOMStringImpl *text, bool force=false); void setTextWithOffset(DOM::DOMStringImpl *text, uint offset, uint len, bool force=false); virtual bool canBeSelectionLeaf() const { return true; } virtual SelectionState selectionState() const {return m_selectionState;} virtual void setSelectionState(SelectionState s); virtual QRect selectionRect(); virtual QRect caretRect(int offset, EAffinity affinity, int *extraWidthToEndOfLine = 0); void posOfChar(int ch, int &x, int &y); virtual int marginLeft() const { return style()->marginLeft().minWidth(0); } virtual int marginRight() const { return style()->marginRight().minWidth(0); } virtual QRect getAbsoluteRepaintRect(); const QFontMetrics &metrics(bool firstLine) const; const Font *htmlFont(bool firstLine) const; DOM::TextImpl *element() const { return static_cast(RenderObject::element()); } InlineTextBox* firstTextBox() const { return m_firstTextBox; } InlineTextBox* lastTextBox() const { return m_lastTextBox; } virtual InlineBox *inlineBox(long offset, EAffinity affinity = UPSTREAM); #if APPLE_CHANGES int widthFromCache(const Font *, int start, int len, int tabWidth, int xpos) const; bool shouldUseMonospaceCache(const Font *) const; void cacheWidths(); bool allAscii() const; #endif virtual long caretMinOffset() const; virtual long caretMaxOffset() const; virtual unsigned long caretMaxRenderedOffset() const; virtual long previousOffset (long current) const; virtual long nextOffset (long current) const; bool containsReversedText() { return m_containsReversedText; } #if APPLE_CHANGES public: #endif InlineTextBox * findNextInlineTextBox( int offset, int &pos ) const; protected: // members DOM::DOMStringImpl *str; InlineTextBox* m_firstTextBox; InlineTextBox* m_lastTextBox; int m_minWidth; int m_maxWidth; int m_beginMinWidth; int m_endMinWidth; SelectionState m_selectionState : 3 ; 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., 
 with '\n').
    bool m_hasTab : 1; // Whether or not we have a variable width tab character (e.g., 
 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
#if APPLE_CHANGES
    mutable bool m_allAsciiChecked:1;
    mutable bool m_allAscii:1;
    int m_monospaceCharacterWidth;
#endif
};

// Used to represent a text substring of an element, e.g., for text runs that are split because of
// first letter and that must therefore have different styles (and positions in the render tree).
// We cache offsets so that text transformations can be applied in such a way that we can recover
// the original unaltered string from our corresponding DOM node.
class RenderTextFragment : public RenderText
{
public:
    RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str,
                       int startOffset, int endOffset);
    RenderTextFragment(DOM::NodeImpl* _node, DOM::DOMStringImpl* _str);
    ~RenderTextFragment();
    
    virtual bool isTextFragment() const;
    
    uint start() const { return m_start; }
    uint end() const { return m_end; }
    
    DOM::DOMStringImpl* contentString() const { return m_generatedContentStr; }
    virtual DOM::DOMStringImpl* originalString() const;
    
private:
    uint m_start;
    uint m_end;
    DOM::DOMStringImpl* m_generatedContentStr;
};
};
#endif