qmultilineedit.cpp

基于qt2的电子书

    if ( cursorY >= line && cursorY > 0 )
	cursorY--;
    bool updt = autoUpdate() && rowIsVisible( line );
    QMultiLineEditRow* r = contents->at( line );
    ASSERT( r );
    bool recalc = r->w == maxLineWidth();
    contents->remove( line );
    if ( contents->count() == 0 ) {
	int w  = textWidth( QString::fromLatin1("") );
	contents->append( new QMultiLineEditRow(QString::fromLatin1(""), w) );
	setWidth( w );
	dummy = TRUE;
    }
    if ( setNumRowsAndTruncate() )
	recalc = updt = FALSE;
    if ( recalc )
	updateCellWidth();
    makeVisible();
    if (updt)
	update();
    textDirty = TRUE;
    d->edited = TRUE;
}

/*!
  Inserts \a s at the current cursor position.
*/
void QMultiLineEdit::insert( const QString& s )
{
    insert( s, FALSE );
}

/*!
  Inserts \a c at the current cursor position.
  (this function is provided for backward compatibility -
  it simply calls insert()).
*/
void QMultiLineEdit::insertChar( QChar c )
{
    insert(c);
}

/*!
  Inserts \a c at the current cursor position.
*/

void QMultiLineEdit::insert( const QString& str, bool mark )
{
    dummy = FALSE;
    bool wasMarkedText = hasMarkedText();
    if ( wasMarkedText )
	addUndoCmd( new QBeginCommand );
    if ( wasMarkedText )
	del();					// ## Will flicker
    QString *s = getString( cursorY );
    if ( cursorX > (int)s->length() )
	cursorX = s->length();
    else if ( overWrite && !wasMarkedText && cursorX < (int)s->length() )
	del();                                 // ## Will flicker
    insertAt(str, cursorY, cursorX, mark );
    makeVisible();

    if ( wasMarkedText )
	addUndoCmd( new QEndCommand() );
}

/*!
  Makes a line break at the current cursor position.
*/

void QMultiLineEdit::newLine()
{
    insert("\n");
}

/*!
  Deletes text from the current cursor position to the end of the line.
*/

void QMultiLineEdit::killLineAux()
{
    deselect(); // -sanders Don't let del() delete marked region
    QMultiLineEditRow* r = contents->at( cursorY );
    if ( cursorX == (int)r->s.length() ) {
	//      if (r->newline) // -sanders Only del newlines!
	del();
	return;
    } else {
	bool recalc = r->w == maxLineWidth();
	r->s.remove( cursorX, r->s.length() );
	r->w = textWidth( r->s );
	updateCell( cursorY, 0, FALSE );
	if ( recalc )
	    updateCellWidth();
	rebreakParagraph( cursorY ); // -sanders
	textDirty = TRUE;
	d->edited = TRUE;
    }
    curXPos  = 0;
    makeVisible();
    turnMark( FALSE );
}


/*!
  Moves the cursor one character to the left. If \a mark is TRUE, the text
  is marked. If \a wrap is TRUE, the cursor moves to the end of the
  previous line  if it is placed at the beginning of the current line.

  \sa cursorRight() cursorUp() cursorDown()
*/

void QMultiLineEdit::cursorLeft( bool mark, bool wrap )
{
    cursorLeft(mark,!mark,wrap);
}
void QMultiLineEdit::cursorLeft( bool mark, bool clear_mark, bool wrap )
{
    if ( cursorX != 0 || cursorY != 0 && wrap ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	int ll = lineLength( cursorY );
	if ( cursorX > ll )
	    cursorX = ll;
	cursorOn = TRUE;
	cursorX--;
	if ( cursorX < 0 ) {
	    int oldY = cursorY;
	    if ( cursorY > 0 ) {
		cursorY--;
		cursorX = lineLength( cursorY );
		if ( cursorX > 1 && !isEndOfParagraph( cursorY ) )
		    cursorX--;
	    } else {
		cursorY = 0; //### ?
		cursorX = 0;
	    }
	    updateCell( oldY, 0, FALSE );
	}
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
	updateCell( cursorY, 0, FALSE );
    }
    curXPos  = 0;
    makeVisible();
    if ( clear_mark )
	turnMark( FALSE );
}

/*!
  Moves the cursor one character to the right.  If \a mark is TRUE, the text
  is marked. If \a wrap is TRUE, the cursor moves to the beginning of the next
  line if it is placed at the end of the current line.
  \sa cursorLeft() cursorUp() cursorDown()
*/

void QMultiLineEdit::cursorRight( bool mark, bool wrap )
{
    cursorRight(mark,!mark,wrap);
}
void QMultiLineEdit::cursorRight( bool mark, bool clear_mark, bool wrap )
{
    int strl = lineLength( cursorY );
    if ( strl > 1 && !isEndOfParagraph( cursorY ) )
	 strl--;
    if ( cursorX < strl || cursorY < (int)contents->count() - 1 && wrap ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	cursorOn = TRUE;
	cursorX++;
	if ( cursorX > strl ) {
	    int oldY = cursorY;
	    if ( cursorY < (int) contents->count() - 1 ) {
		cursorY++;
		cursorX = 0;
	    } else {
		cursorX = lineLength( cursorY );
	    }
	    updateCell( oldY, 0, FALSE );
	}
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	updateCell( cursorY, 0, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
    }
    curXPos  = 0;
    makeVisible();
    if ( clear_mark )
	turnMark( FALSE );
}

/*!
  Moves the cursor up one line.  If \a mark is TRUE, the text
  is marked.
  \sa cursorDown() cursorLeft() cursorRight()
*/

void QMultiLineEdit::cursorUp( bool mark )
{
    cursorUp(mark,!mark);
}
void QMultiLineEdit::cursorUp( bool mark, bool clear_mark )
{
    if ( cursorY != 0 ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	if ( !curXPos )
	    curXPos = mapToView( cursorX, cursorY );
	int oldY = cursorY;
	d->blinkTimer->stop();
	cursorOn = TRUE;
	cursorY--;
	if ( cursorY < 0 ) {
	    cursorY = 0;
	}
	cursorX = mapFromView( curXPos, cursorY );
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	updateCell( oldY, 0, FALSE );
	updateCell( cursorY, 0, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
    }
    makeVisible();
    if ( clear_mark )
	turnMark( FALSE );
}

/*!
  Moves the cursor one line down.  If \a mark is TRUE, the text
  is marked.
  \sa cursorUp() cursorLeft() cursorRight()
*/

void QMultiLineEdit::cursorDown( bool mark )
{
    cursorDown(mark,!mark);
}
void QMultiLineEdit::cursorDown( bool mark, bool clear_mark )
{
    int lastLin = contents->count() - 1;
    if ( cursorY != lastLin ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	if ( !curXPos )
	    curXPos = mapToView( cursorX, cursorY );
	int oldY = cursorY;
	d->blinkTimer->stop();
	cursorOn = TRUE;
	cursorY++;
	if ( cursorY > lastLin ) {
	    cursorY = lastLin;
	}
	cursorX = mapFromView( curXPos, cursorY );
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	updateCell( oldY, 0, FALSE );
	updateCell( cursorY, 0, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
    }
    makeVisible();
    if ( clear_mark )
	turnMark( FALSE );
}

/*!
  Turns off marked text
*/
void QMultiLineEdit::turnMark( bool on )
{
    if ( on != markIsOn ) {
	markIsOn = on;
	if ( echoMode() == Normal )
	    emit copyAvailable( on );
	update();
    }
}




/*!
  Deletes the character on the left side of the text cursor and moves
  the cursor one position to the left. If a text has been marked by
  the user (e.g. by clicking and dragging) the cursor is put at the
  beginning of the marked text and the marked text is removed.
  \sa del()
*/

void QMultiLineEdit::backspace()
{
    if ( hasMarkedText() ) {
	del();
    } else {
	if ( !atBeginning() ) {
	    cursorLeft( FALSE );
	    del();
	}
    }
    makeVisible();
}


void	QMultiLineEdit::removeText( int markBeginY, int markBeginX,
				    int markEndY, int markEndX )
{

	textDirty = TRUE;
	d->edited = TRUE;
	if ( markBeginY == markEndY ) { //just one line
	    QMultiLineEditRow *r = contents->at( markBeginY );
	    ASSERT(r);
	    bool recalc = r->w == maxLineWidth();
	    r->s.remove( markBeginX, markEndX - markBeginX );
	    r->w = textWidth( r->s );
	    cursorX  = markBeginX;
	    cursorY  = markBeginY;

	    if (autoUpdate() )
		updateCell( cursorY, 0, FALSE );
	    if ( recalc )
		updateCellWidth();
	} else { //multiline
	    bool oldAuto = autoUpdate();
	    setAutoUpdate( FALSE );
	    ASSERT( markBeginY >= 0);
	    ASSERT( markEndY < (int)contents->count() );

	    QMultiLineEditRow *firstR, *lastR;
	    firstR = contents->at( markBeginY );
	    lastR  = contents->at( markEndY );
	    ASSERT( firstR != lastR );
	    firstR->s.remove( markBeginX, firstR->s.length() - markBeginX  );
	    lastR->s.remove( 0, markEndX  );
	    firstR->s.append( lastR->s );  // lastS will be removed in loop below
	    firstR->newline = lastR->newline; // Don't forget this -sanders
	    firstR->w = textWidth( firstR->s );

	    for( int i = markBeginY + 1 ; i <= markEndY ; i++ )
		contents->remove( markBeginY + 1 );

	    if ( contents->isEmpty() )
		insertLine( QString::fromLatin1(""), -1 );

	    cursorX  = markBeginX;
	    cursorY  = markBeginY;
	    curXPos  = 0;

	    setNumRowsAndTruncate();
	    updateCellWidth();
	    setAutoUpdate( oldAuto );
	    if ( autoUpdate() )
		update();
	}


}

void QMultiLineEdit::delAux()
{
    int markBeginX, markBeginY;
    int markEndX, markEndY;
    QRect oldContents = contentsRect();
    if ( getMarkedRegion( &markBeginY, &markBeginX, &markEndY, &markEndX ) ) {
	turnMark( FALSE );

	removeText( markBeginY, markBeginX, markEndY, markEndX );

	markAnchorY = markDragY = cursorY;
	markAnchorX = markDragX = cursorX;
    } else {
	if ( !atEnd() ) {
	    textDirty = TRUE;
	    d->edited = TRUE;
	    QMultiLineEditRow *r = contents->at( cursorY );
	    if ( cursorX == (int) r->s.length() ) { // remove newline
		QMultiLineEditRow* other = contents->at( cursorY + 1 );
		if ( ! r->newline && cursorX )
		    r->s.truncate( r->s.length()-1 );

		bool needBreak = !r->s.isEmpty();
		r->s += other->s;
		r->newline =  other->newline;
		contents->remove( cursorY + 1 );
		if ( needBreak )
		    rebreakParagraph( cursorY, 1 );
		else
		    wrapLine( cursorY, 1 );
	    } else {
		bool recalc = r->w == maxLineWidth();
		r->s.remove( cursorX, 1 );
		rebreakParagraph( cursorY );
		if ( recalc )
		    updateCellWidth();
	    }
	}
    }
    if ( DYNAMIC_WRAP && oldContents != contentsRect() ) {
	if ( oldContents.width() != contentsRect().width() ) {
	    bool oldAuto = autoUpdate();
	    setAutoUpdate( FALSE );
	    rebreakAll();
	    setAutoUpdate( oldAuto );
	}
	if ( autoUpdate() )
	    update();
    }
    curXPos  = 0;
    makeVisible();
}

/*!
  Moves the text cursor to the left end of the line. If \a mark is
  TRUE, text is marked towards the first position. If it is FALSE and
  the cursor is moved, all marked text is unmarked.

  \sa end()
*/

void QMultiLineEdit::home( bool mark )
{
    if ( cursorX != 0 ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	cursorX = 0;
	cursorOn = TRUE;
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	updateCell( cursorY, 0, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
    }
    curXPos  = 0;
    if ( !mark )
	turnMark( FALSE );
    makeVisible();
}

/*!
  Moves the text cursor to the right end of the line. If mark is TRUE
  text is marked towards the last position.  If it is FALSE and the
  cursor is moved, all marked text is unmarked.

  \sa home()
*/

void QMultiLineEdit::end( bool mark )
{
    int tlen = lineLength( cursorY );
    if ( cursorX != tlen ) {
	if ( mark && !hasMarkedText() ) {
	    markAnchorX    = cursorX;
	    markAnchorY    = cursorY;
	}
	d->blinkTimer->stop();
	cursorX = tlen;
	cursorOn  = TRUE;
	if ( mark )
	    newMark( cursorX, cursorY, FALSE );
	d->blinkTimer->start( QApplication::cursorFlashTime() / 2, FALSE );
	updateCell( cursorY, 0, FALSE );
    }
    curXPos  = 0;
    makeVisible();
    if ( !mark )
	turnMark( FALSE );
}

#ifndef QT_NO_QWS_IM
int  QMultiLineEdit::pixelPosToIMPos( const QPoint &p ) const
{
    int xPos, yPos;
    pixelPosToCursorPos( p, &xPos, &yPos );

    //count to find the position
    int clickPos = 0;
    if ( yPos > d->preeditEndY || 
	 yPos == d->preeditEndY && xPos > d->preeditEndX ) {
	xPos = d->preeditEndX;
	yPos = d->preeditEndY;
    }

	
    int x = d->preeditStartX;
    int y = d->preeditStartY;
	
    while ( y <= yPos ) {
	if ( y == yPos ) {
	    if ( x < xPos )
		clickPos += xPos - x;
	} else {
	    QString *s = getString( y );
	    int lineLen = s ? s->length() : 0;
	    clickPos += lineLen - x;
	}
	x = 0;
	y++;
    }
    return clickPos;
    
}
#endif


/*!\reimp
*/
void QMultiLineEdit::mousePressEvent( QMouseEvent *e )
{
#ifndef QT_NO_QWS_IM
    if ( composeMode() ) {
#if defined (_WS_QWS_)
	QPaintDevice::qwsDisplay()->sendIMMouseEvent( pixelPosToIMPos( e->pos() ), TRUE ); 

#endif
	
	return;
    }
#endif

    stopAutoScroll();
    d->dnd_startpos = e->pos();

    if ( e->button() == RightButton ) {
	QPopupMenu *popup = new QPopupMenu( this );