qrichtext_p.h

linux下聊天室的稳定版本

    QTextInsertCommand( QTextDocument *d, int i, int idx, const QMemArray<QTextStringChar> &str,
			const QByteArray& oldStyleInfo )
	: QTextDeleteCommand( d, i, idx, str, oldStyleInfo ) {}
    QTextInsertCommand( QTextParagraph *p, int idx, const QMemArray<QTextStringChar> &str )
	: QTextDeleteCommand( p, idx, str ) {}
    virtual ~QTextInsertCommand() {}

    Commands type() const { return Insert; }
    QTextCursor *execute( QTextCursor *c ) { return QTextDeleteCommand::unexecute( c ); }
    QTextCursor *unexecute( QTextCursor *c ) { return QTextDeleteCommand::execute( c ); }

};

class Q_EXPORT QTextFormatCommand : public QTextCommand
{
public:
    QTextFormatCommand( QTextDocument *d, int sid, int sidx, int eid, int eidx, const QMemArray<QTextStringChar> &old, QTextFormat *f, int fl );
    virtual ~QTextFormatCommand();

    Commands type() const { return Format; }
    QTextCursor *execute( QTextCursor *c );
    QTextCursor *unexecute( QTextCursor *c );

protected:
    int startId, startIndex, endId, endIndex;
    QTextFormat *format;
    QMemArray<QTextStringChar> oldFormats;
    int flags;

};

class Q_EXPORT QTextStyleCommand : public QTextCommand
{
public:
    QTextStyleCommand( QTextDocument *d, int fParag, int lParag, const QByteArray& beforeChange  );
    virtual ~QTextStyleCommand() {}

    Commands type() const { return Style; }
    QTextCursor *execute( QTextCursor *c );
    QTextCursor *unexecute( QTextCursor *c );

    static QByteArray readStyleInformation(  QTextDocument* d, int fParag, int lParag );
    static void writeStyleInformation(  QTextDocument* d, int fParag, const QByteArray& style );

private:
    int firstParag, lastParag;
    QByteArray before;
    QByteArray after;
};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

struct Q_EXPORT QTextParagraphSelection
{
    QTextParagraphSelection() : start(0), end(0) { }
    int start, end;
    Q_DUMMY_COMPARISON_OPERATOR(QTextParagraphSelection)
};

struct Q_EXPORT QTextLineStart
{
    QTextLineStart() : y( 0 ), baseLine( 0 ), h( 0 )
    {  }
    QTextLineStart( int y_, int bl, int h_ ) : y( y_ ), baseLine( bl ), h( h_ ),
	w( 0 )
    {  }

public:
    int y, baseLine, h;
    int w;
};

#if defined(Q_TEMPLATEDLL)
// MOC_SKIP_BEGIN
Q_TEMPLATE_EXTERN template class Q_EXPORT QMap<int, QTextParagraphSelection>;
Q_TEMPLATE_EXTERN template class Q_EXPORT QMap<int, QTextLineStart*>;
// MOC_SKIP_END
#endif

class Q_EXPORT QTextParagraphData
{
public:
    QTextParagraphData() {}
    virtual ~QTextParagraphData();
    virtual void join( QTextParagraphData * );
};

class QTextParagraphPseudoDocument;

class QSyntaxHighlighter;

class Q_EXPORT QTextParagraph
{
    friend class QTextDocument;
    friend class QTextCursor;
    friend class QSyntaxHighlighter;

public:
    QTextParagraph( QTextDocument *d, QTextParagraph *pr = 0, QTextParagraph *nx = 0, bool updateIds = TRUE );
    ~QTextParagraph();

    QTextString *string() const;
    QTextStringChar *at( int i ) const; // maybe remove later
    int leftGap() const;
    int length() const; // maybe remove later

    void setListStyle( QStyleSheetItem::ListStyle ls ) { lstyle = ls; changed = TRUE; }
    QStyleSheetItem::ListStyle listStyle() const { return (QStyleSheetItem::ListStyle)lstyle; }
    void setListItem( bool li );
    bool isListItem() const { return litem; }
    void setListValue( int v ) { list_val = v; }
    int listValue() const { return list_val > 0 ? list_val : -1; }

    void setListDepth( int depth );
    int listDepth() const { return ldepth; }

//     void setFormat( QTextFormat *fm );
//     QTextFormat *paragFormat() const;

    inline QTextDocument *document() const {
	if (hasdoc) return (QTextDocument*) docOrPseudo;
	return 0;
    }
    QTextParagraphPseudoDocument *pseudoDocument() const;

    QRect rect() const;
    void setHeight( int h ) { r.setHeight( h ); }
    void show();
    void hide();
    bool isVisible() const { return visible; }

    QTextParagraph *prev() const;
    QTextParagraph *next() const;
    void setPrev( QTextParagraph *s );
    void setNext( QTextParagraph *s );

    void insert( int index, const QString &s );
    void insert( int index, const QChar *unicode, int len );
    void append( const QString &s, bool reallyAtEnd = FALSE );
    void truncate( int index );
    void remove( int index, int len );
    void join( QTextParagraph *s );

    void invalidate( int chr );

    void move( int &dy );
    void format( int start = -1, bool doMove = TRUE );

    bool isValid() const;
    bool hasChanged() const;
    void setChanged( bool b, bool recursive = FALSE );

    int lineHeightOfChar( int i, int *bl = 0, int *y = 0 ) const;
    QTextStringChar *lineStartOfChar( int i, int *index = 0, int *line = 0 ) const;
    int lines() const;
    QTextStringChar *lineStartOfLine( int line, int *index = 0 ) const;
    int lineY( int l ) const;
    int lineBaseLine( int l ) const;
    int lineHeight( int l ) const;
    void lineInfo( int l, int &y, int &h, int &bl ) const;

    void setSelection( int id, int start, int end );
    void removeSelection( int id );
    int selectionStart( int id ) const;
    int selectionEnd( int id ) const;
    bool hasSelection( int id ) const;
    bool hasAnySelection() const;
    bool fullSelected( int id ) const;

    void setEndState( int s );
    int endState() const;

    void setParagId( int i );
    int paragId() const;

    bool firstPreProcess() const;
    void setFirstPreProcess( bool b );

    void indent( int *oldIndent = 0, int *newIndent = 0 );

    void setExtraData( QTextParagraphData *data );
    QTextParagraphData *extraData() const;

    QMap<int, QTextLineStart*> &lineStartList();

    void setFormat( int index, int len, QTextFormat *f, bool useCollection = TRUE, int flags = -1 );

    void setAlignment( int a );
    int alignment() const;

    void paint( QPainter &painter, const QColorGroup &cg, QTextCursor *cursor = 0, bool drawSelections = FALSE,
			int clipx = -1, int clipy = -1, int clipw = -1, int cliph = -1 );

    int topMargin() const;
    int bottomMargin() const;
    int leftMargin() const;
    int firstLineMargin() const;
    int rightMargin() const;
    int lineSpacing() const;

#ifndef QT_NO_TEXTCUSTOMITEM
    void registerFloatingItem( QTextCustomItem *i );
    void unregisterFloatingItem( QTextCustomItem *i );
#endif

    void setFullWidth( bool b ) { fullWidth = b; }
    bool isFullWidth() const { return fullWidth; }

#ifndef QT_NO_TEXTCUSTOMITEM
    QTextTableCell *tableCell() const;
#endif

    QBrush *background() const;

    int documentWidth() const;
    int documentVisibleWidth() const;
    int documentX() const;
    int documentY() const;
    QTextFormatCollection *formatCollection() const;
    QTextFormatter *formatter() const;

    int nextTab( int i, int x );
    int *tabArray() const;
    void setTabArray( int *a );
    void setTabStops( int tw );

    void adjustToPainter( QPainter *p );

    void setNewLinesAllowed( bool b );
    bool isNewLinesAllowed() const;

    QString richText() const;

    void addCommand( QTextCommand *cmd );
    QTextCursor *undo( QTextCursor *c = 0 );
    QTextCursor *redo( QTextCursor *c  = 0 );
    QTextCommandHistory *commands() const;
    void copyParagData( QTextParagraph *parag );

    void setBreakable( bool b ) { breakable = b; }
    bool isBreakable() const { return breakable; }

    void setBackgroundColor( const QColor &c );
    QColor *backgroundColor() const { return bgcol; }
    void clearBackgroundColor();

    void setMovedDown( bool b ) { movedDown = b; }
    bool wasMovedDown() const { return movedDown; }

    void setDirection( QChar::Direction d );
    QChar::Direction direction() const;
    void setPaintDevice( QPaintDevice *pd ) { paintdevice = pd; }

    void readStyleInformation( QDataStream& stream );
    void writeStyleInformation( QDataStream& stream ) const;

protected:
    void setColorForSelection( QColor &c, QPainter &p, const QColorGroup& cg, int selection );
    void drawLabel( QPainter* p, int x, int y, int w, int h, int base, const QColorGroup& cg );
    void drawString( QPainter &painter, const QString &str, int start, int len, int xstart,
			     int y, int baseLine, int w, int h, bool drawSelections, int fullSelectionWidth,
			     QTextStringChar *formatChar, const QColorGroup& cg,
			     bool rightToLeft );

private:
    QMap<int, QTextParagraphSelection> &selections() const;
#ifndef QT_NO_TEXTCUSTOMITEM
    QPtrList<QTextCustomItem> &floatingItems() const;
#endif
    QBrush backgroundBrush( const QColorGroup&cg ) { if ( bgcol ) return *bgcol; return cg.brush( QColorGroup::Base ); }
    void invalidateStyleCache();

    QMap<int, QTextLineStart*> lineStarts;
    QRect r;
    QTextParagraph *p, *n;
    void *docOrPseudo;
    uint changed : 1;
    uint firstFormat : 1;
    uint firstPProcess : 1;
    uint needPreProcess : 1;
    uint fullWidth : 1;
    uint lastInFrame : 1;
    uint visible : 1;
    uint breakable : 1;
    uint movedDown : 1;
    uint mightHaveCustomItems : 1;
    uint hasdoc : 1;
    uint litem : 1; // whether the paragraph is a list item
    uint rtext : 1; // whether the paragraph needs rich text margin
    int align : 4;
    uint /*QStyleSheetItem::ListStyle*/ lstyle : 4;
    int invalid;
    int state, id;
    QTextString *str;
    QMap<int, QTextParagraphSelection> *mSelections;
#ifndef QT_NO_TEXTCUSTOMITEM
    QPtrList<QTextCustomItem> *mFloatingItems;
#endif
    short utm, ubm, ulm, urm, uflm, ulinespacing;
    short tabStopWidth;
    int minwidth;
    int *tArray;
    QTextParagraphData *eData;
    short list_val;
    ushort ldepth;
    QColor *bgcol;
    QPaintDevice *paintdevice;
};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextFormatter
{
public:
    QTextFormatter();
    virtual ~QTextFormatter();

    virtual int format( QTextDocument *doc, QTextParagraph *parag, int start, const QMap<int, QTextLineStart*> &oldLineStarts ) = 0;
    virtual int formatVertically( QTextDocument* doc, QTextParagraph* parag );

    bool isWrapEnabled( QTextParagraph *p ) const { if ( !wrapEnabled ) return FALSE; if ( p && !p->isBreakable() ) return FALSE; return TRUE;}
    int wrapAtColumn() const { return wrapColumn;}
    virtual void setWrapEnabled( bool b );
    virtual void setWrapAtColumn( int c );
    virtual void setAllowBreakInWords( bool b ) { biw = b; }
    bool allowBreakInWords() const { return biw; }

    int minimumWidth() const { return thisminw; }
    int widthUsed() const { return thiswused; }

protected:
    virtual QTextLineStart *formatLine( QTextParagraph *parag, QTextString *string, QTextLineStart *line, QTextStringChar *start,
					       QTextStringChar *last, int align = Qt::AlignAuto, int space = 0 );
#ifndef QT_NO_COMPLEXTEXT
    virtual QTextLineStart *bidiReorderLine( QTextParagraph *parag, QTextString *string, QTextLineStart *line, QTextStringChar *start,
						    QTextStringChar *last, int align, int space );
#endif
    void insertLineStart( QTextParagraph *parag, int index, QTextLineStart *ls );

    int thisminw;
    int thiswused;

private:
    bool wrapEnabled;
    int wrapColumn;
    bool biw;

#ifdef HAVE_THAI_BREAKS
    static QCString *thaiCache;
    static QTextString *cachedString;
    static ThBreakIterator *thaiIt;
#endif
};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextFormatterBreakInWords : public QTextFormatter
{
public:
    QTextFormatterBreakInWords();
    virtual ~QTextFormatterBreakInWords() {}

    int format( QTextDocument *doc, QTextParagraph *parag, int start, const QMap<int, QTextLineStart*> &oldLineStarts );

};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextFormatterBreakWords : public QTextFormatter
{
public:
    QTextFormatterBreakWords();
    virtual ~QTextFormatterBreakWords() {}

    int format( QTextDocument *doc, QTextParagraph *parag, int start, const QMap<int, QTextLineStart*> &oldLineStarts );

};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextIndent
{
public:
    QTextIndent();
    virtual ~QTextIndent() {}

    virtual void indent( QTextDocument *doc, QTextParagraph *parag, int *oldIndent = 0, int *newIndent = 0 ) = 0;

};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextPreProcessor
{
public:
    enum Ids {
	Standard = 0
    };

    QTextPreProcessor();
    virtual ~QTextPreProcessor() {}

    virtual void process( QTextDocument *doc, QTextParagraph *, int, bool = TRUE ) = 0;
    virtual QTextFormat *format( int id ) = 0;

};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

class Q_EXPORT QTextFormat
{
    friend class QTextFormatCollection;
    friend class QTextDocument;

public:
    enum Flags {
	NoFlags,
	Bold = 1,
	Italic = 2,
	Underline = 4,
	Family = 8,
	Size = 16,
	Color = 32,
	Misspelled = 64,
	VAlign = 128,
	StrikeOut= 256,
	Font = Bold | Italic | Underline | Family | Size | StrikeOut,
	Format = Font | Color | Misspelled | VAlign
    };

    enum VerticalAlignment { AlignNormal, AlignSuperScript, AlignSubScript };

    QTextFormat();
    virtual ~QTextFormat();

    QTextFormat( const QStyleSheetItem *s );
    QTextFormat( const QFont &f, const QColor &c, QTextFormatCollection *parent = 0 );
    QTextFormat( const QTextFormat &fm );
    QTextFormat makeTextFormat( const QStyleSheetItem *style, const QMap<QString,QString>& attr, double scaleFontsFactor ) const;
    QTextFormat& operator=( const QTextFormat &fm );
    QColor color() const;
    QFont font() const;
    QFontMetrics fontMetrics() const { return fm; }
    bool isMisspelled() const;
    VerticalAlignment vAlign() const;
    int minLeftBearing() const;
    int minRightBearing() const;
    int width( const QChar &c ) const;
    int width( const QString &str, int pos ) const;
    int height() const;
    int ascent() const;
    int descent() const;
    int leading() const;
    bool useLinkColor() const;

    void setBold( bool b );
    void setItalic( bool b );
    void setUnderline( bool b );
    void setStrikeOut( bool b );
    void setFamily( const QString &f );
    void setPointSize( int s );
    void setFont( const QFont &f );
    void setColor( const QColor &c );
    void setMisspelled( bool b );
    void setVAlign( VerticalAlignment a );

    bool operator==( const QTextFormat &f ) const;
    QTextFormatCollection *parent() const;
    const QString &key() const;

    static QString getKey( const QFont &f, const QColor &c, bool misspelled, VerticalAlignment vAlign );

    void addRef();
    void removeRef();

    QString makeFormatChangeTags( QTextFormat* defaultFormat, QTextFormat *f, const QString& oldAnchorHref, const QString& anchorHref ) const;
    QString makeFormatEndTags( QTextFormat* defaultFormat, const QString& anchorHref ) const;

    static void setPainter( QPainter *p );
    static QPainter* painter();

    bool fontSizesInPixels() { return usePixelSizes; }

protected:
    virtual void generateKey();

private:
    void update();
    static void applyFont( const QFont &f );

private:
    QFont fn;
    QColor col;
    QFontMetrics fm;
    uint missp : 1;
    uint linkColor : 1;
    uint usePixelSizes : 1;
    int leftBearing, rightBearing;
    VerticalAlignment ha;
    uchar widths[ 256 ];
    int hei, asc, dsc;
    QTextFormatCollection *collection;
    int ref;
    QString k;
    int logicalFontSize;
    int stdSize;
    static QPainter *pntr;
    static QFontMetrics *pntr_fm;
    static int pntr_asc;
    static int pntr_hei;
    static int pntr_ldg;
    static int pntr_dsc;

};

// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

#if defined(Q_TEMPLATEDLL)
// MOC_SKIP_BEGIN
Q_TEMPLATE_EXTERN template class Q_EXPORT QDict<QTextFormat>;
// MOC_SKIP_END
#endif

class Q_EXPORT QTextFormatCollection
{
    friend class QTextDocument;
    friend class QTextFormat;

public:
    QTextFormatCollection();
    virtual ~QTextFormatCollection();

    void setDefaultFormat( QTextFormat *f );
    QTextFormat *defaultFormat() const;
    virtual QTextFormat *format( QTextFormat *f );