/****************************************************************************
** $Id$
**
** Implementation of the QTextEdit class
**
** Created : 990101
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the widgets module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses may use this file in accordance with the Qt Commercial License
** Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "qtextedit.h"

#ifndef QT_NO_TEXTEDIT

#include "../kernel/qrichtext_p.h"
#include "qpainter.h"
#include "qpen.h"
#include "qbrush.h"
#include "qpixmap.h"
#include "qfont.h"
#include "qcolor.h"
#include "qsize.h"
#include "qevent.h"
#include "qtimer.h"
#include "qapplication.h"
#include "qlistbox.h"
#include "qvbox.h"
#include "qapplication.h"
#include "qclipboard.h"
#include "qcolordialog.h"
#include "qfontdialog.h"
#include "qstylesheet.h"
#include "qdragobject.h"
#include "qurl.h"
#include "qcursor.h"
#include "qregexp.h"
#include "qpopupmenu.h"

#ifndef QT_NO_ACCEL
#include <qkeysequence.h>
#define ACCEL_KEY(k) "\t" + QString(QKeySequence( Qt::CTRL | Qt::Key_ ## k ))
#else
#define ACCEL_KEY(k) "\t" + QString("Ctrl+" #k)
#endif

struct QUndoRedoInfoPrivate
{
    QTextString text;
};

class QTextEditPrivate
{
public:
    QTextEditPrivate()
    {
	preeditStart = -1;
	preeditLength = -1;
    }
    int id[ 7 ];
    int preeditStart;
    int preeditLength;
};

static bool block_set_alignment = FALSE;

/*!
  \class QTextEdit qtextedit.h
  \brief The QTextEdit widget provides a sophisticated single-page rich text editor.

  \ingroup basic
  \ingroup text
  \mainclass

    QTextEdit is an advanced WYSIWYG editor supporting rich text
    formatting. It is optimized to handle large documents and to respond
    quickly to user input.

    Internally QTextEdit works on paragraphs and characters. A paragraph
    is a formatted string which is word-wrapped to fit into the width of
    the widget. The words in the paragraph are aligned in accordance
    with the paragraph's alignment(). Paragraphs are separated by hard
    line breaks. Each character within a paragraph has its own
    attributes, for example, font and color.

    QTextEdit can display images (using QMimeSourceFactory), lists and
    tables. If the text is too large to view within the text edit's
    viewport, scrollbars will appear. The text edit can load both plain
    text and HTML files (a subset of HTML 3.2 and 4).  The rendering
    style and the set of valid tags are defined by a styleSheet().
    Change the style sheet with \l{setStyleSheet()}; see QStyleSheet
    for details. The images identified by image tags are displayed if
    they can be interpreted using the text edit's
    \l{QMimeSourceFactory}; see setMimeSourceFactory().

    If you want a text browser with more navigation use
    QTextBrowser. If you just need to display a small piece of rich
    text use QLabel or QSimpleRichText.

    If you create a new QTextEdit, and want to allow the user to edit
    rich text, call setTextFormat(Qt::RichText) to ensure that the
    text is treated as rich text. (Rich text uses HTML tags to set
    text formatting attributes. See QStyleSheet for information on the
    HTML tags that are supported.). If you don't call setTextFormat()
    explicitly the text edit will guess from the text itself whether it
    is rich text or plain text.

    The text edit documentation uses the following concepts:
    \list
    \i <i>current format</i> --
    this is the format at the current cursor position, \e and it
    is the format of the selected text if any.
    \i <i>current paragraph</i> -- the paragraph which contains the
    cursor.
    \endlist

    The text is set or replaced using setText() which deletes any
    existing text and replaces it with the text passed in the setText()
    call. Text can be inserted with insert(), paste() and
    pasteSubType(). Text can also be cut(). The entire text is deleted
    with clear() and the selected text is deleted with
    removeSelectedText(). Selected (marked) text can also be deleted
    with del() (which will delete the character to the right of the
    cursor if no text is selected).

    The current format's attributes are set with setItalic(), setBold(),
    setUnderline(), setFamily() (font family), setPointSize(),
    setColor() and setCurrentFont().  The current paragraph's style is
    set with setParagType() and its alignment is set with
    setAlignment().

    Use setSelection() to select text. The setSelectionAttributes()
    function is used to indicate how selected text should be displayed.
    Use hasSelectedText() to find out if any text is selected.
    The currently selected text's position is available using
    getSelection() and the selected text itself is returned by
    selectedText(). The selection can be copied to the clipboard with
    copy(), or cut to the clipboard with cut(). It can be deleted with
    removeSelectedText(). The entire text can be selected (or
    unselected) using selectAll(). QTextEdit supports multiple
    selections. Most of the selection functions operate on the default
    selection, selection 0.

    Set and get the position of the cursor with setCursorPosition() and
    getCursorPosition() respectively. When the cursor is moved, the
    signals currentFontChanged(), currentColorChanged() and
    currentAlignmentChanged() are emitted to reflect the font, color and
    alignment at the new cursor position.

    If the text changes, the textChanged() signal is emitted, and if the
    user inserts a new line by pressing Return or Enter, returnPressed()
    is emitted. The isModified() function will return TRUE if the text
    has been modified.

    QTextEdit provides command-based undo and redo. To set the depth of
    the command history use setUndoDepth() which defaults to 100
    steps. To undo or redo the last operation call undo() or
    redo(). The signals undoAvailable() and redoAvailable() indicate
    whether the undo and redo operations can be executed.

    The indent() function is used to reindent a paragraph. It is useful
    for code editors, for example in <em>Qt Designer</em>'s code editor
    \e{Ctrl+I} invokes the indent() function.

  Loading and saving text is achieved using setText() and text(), for
  example:
  \code
    QFile file( fileName ); // Read the text from a file
    if ( file.open( IO_ReadOnly ) ) {
	QTextStream ts( &file );
	textEdit->setText( ts.read() );
    }
  \endcode
  \code
    QFile file( fileName ); // Write the text to a file
    if ( file.open( IO_WriteOnly ) ) {
	QTextStream ts( &file );
	ts << textEdit->text();
	textEdit->setModified( FALSE );
    }
  \endcode

    By default the text edit wraps words at whitespace to fit within
    the text edit widget. The setWordWrap() function is used to
    specify the kind of word wrap you want, or \c NoWrap if you don't
    want any wrapping.  Call setWordWrap() to set a fixed pixel width
    \c FixedPixelWidth, or character column (e.g. 80 column) \c
    FixedColumnWidth with the pixels or columns specified with
    setWrapColumnOrWidth(). If you use word wrap to the widget's width
    \c WidgetWidth, you can specify whether to break on whitespace or
    anywhere with setWrapPolicy().

    The background color is set differently than other widgets, using
    setPaper(). You specify a brush style which could be a plain color
    or a complex pixmap.

    Hypertext links are automatically underlined; this can be changed
    with setLinkUnderline(). The tab stop width is set with
    setTabStopWidth().

    The zoomIn() and zoomOut() functions can be used to resize the text
    by increasing (decreasing for zoomOut()) the point size used. Images
    are not affected by the zoom functions.

    The lines() function returns the number of lines in the text and
    paragraphs() returns the number of paragraphs. The number of lines
    within a particular paragraph is returned by linesOfParagraph(). The
    length of the entire text in characters is returned by length().

    You can scroll to an anchor in the text, e.g. \c{<a name="anchor">}
    with scrollToAnchor(). The find() function can be used to find and
    select a given string within the text.

    The list of key-bindings which are implemented for editing:
  \list
  \i <i> Backspace </i> -- Delete the character to the left of the cursor
  \i <i> Delete </i> -- Delete the character to the right of the cursor
  \i <i> Ctrl+A </i> -- Move the cursor to the beginning of the line
  \i <i> Ctrl+B </i> -- Move the cursor one character left
  \i <i> Ctrl+C </i> -- Copy the marked text to the clipboard (also
  <i>Ctrl+Insert</i> under Windows)
  \i <i> Ctrl+D </i> -- Delete the character to the right of the cursor
  \i <i> Ctrl+E </i> -- Move the cursor to the end of the line
  \i <i> Ctrl+F </i> -- Move the cursor one character right
  \i <i> Ctrl+H </i> -- Delete the character to the left of the cursor
  \i <i> Ctrl+K </i> -- Delete to end of line
  \i <i> Ctrl+N </i> -- Move the cursor one line down
  \i <i> Ctrl+P </i> -- Move the cursor one line up
  \i <i> Ctrl+V </i> -- Paste the clipboard text into line edit (also
  <i>Shift+Insert</i> under Windows)
  \i <i> Ctrl+X </i> -- Cut the marked text, copy to clipboard (also
  <i>Shift+Delete</i> under Windows)
  \i <i> Ctrl+Z </i> -- Undo the last operation
  \i <i> Ctrl+Y </i> -- Redo the last operation
  \i <i> Left Arrow </i> -- Move the cursor one character left
  \i <i> Ctrl+Left Arrow </i> -- Move the cursor one word left
  \i <i> Right Arrow </i> -- Move the cursor one character right
  \i <i> Ctrl+Right Arrow </i> -- Move the cursor one word right
  \i <i> Up Arrow </i> -- Move the cursor one line up
  \i <i> Ctrl+Up Arrow </i> -- Move the cursor one word up
  \i <i> Down Arrow </i> -- Move the cursor one line down
  \i <i> Ctrl+Down Arrow </i> -- Move the cursor one word down
  \i <i> Page Up </i> -- Move the cursor one page up
  \i <i> Page Down </i> -- Move the cursor one page down
  \i <i> Home </i> -- Move the cursor to the beginning of the line
  \i <i> Ctrl+Home Arrow </i> -- Move the cursor to the beginning of the text
  \i <i> End </i> -- Move the cursor to the end of the line
  \i <i> Ctrl+End Arrow </i> -- Move the cursor to the end of the text
    \i <i> Shift+Wheel</i> -- Scroll the page horizontally (the Wheel is
    the mouse wheel)
    \i <i> Ctrl+Wheel</i> -- Zoom the text
  \endlist

    To select (mark) text hold down the Shift key whilst pressing one of
    the movement keystrokes, for example, <i>Shift+Right Arrow</i> will
    select the character to the right, and <i>Shift+Ctrl+Right Arrow</i>
    will select the word to the right, etc.

    By default the text edit widget operates in insert mode so all text
    that the user enters is inserted into the text edit and any text to
    the right of the cursor is moved out of the way. The mode can be
    changed to overwrite, where new text overwrites any text to the right
    of the cursor, using setOverwriteMode().

    QTextEdit can also be used as read-only text viewer. Call
    setReadOnly( TRUE ) to disable editing. A read-only QTextEdit
    provides the same functionality as the (obsolete) QTextView.
    (QTextView is still supplied for compatibility with old code.)

    When QTextEdit is used read-only the key-bindings are limited to
    navigation, and text may only be selected with the mouse:
    \list
    \i <i> Up Arrow </i> -- Move one line up
    \i <i> Down Arrow </i> -- Move one line down
    \i <i> Left Arrow </i> -- Move one character left
    \i <i> Right Arrow </i> -- Move one character right
    \i <i> Page Up </i> -- Move one (viewport) page up
    \i <i> Page Down </i> -- Move one (viewport) page down
    \i <i> Home </i> -- Move to the beginning of the text
    \i <i> End </i> -- Move to the end of the text
    \i <i> Shift+Wheel</i> -- Scroll the page horizontally (the Wheel is
    the mouse wheel)
    \i <i> Ctrl+Wheel</i> -- Zoom the text
    \endlist

    The text edit may be able to provide some meta-information. For
    example, the documentTitle() function will return the text from
    within HTML \c{<title>} tags.

    The text displayed in a text edit has a \e context. The context is
    a path which the text edit's QMimeSourceFactory uses to resolve
    the locations of files and images. It is passed to the
    mimeSourceFactory() when quering data. (See QTextEdit() and
    \l{context()}.)

    Note that we do not intend to add a full-featured web browser
    widget to Qt (because that would easily double Qt's size and only
    a few applications would benefit from it). The rich
    text support in Qt is designed to provide a fast, portable and
    efficient way to add reasonable online help facilities to
    applications, and to provide a basis for rich text editors.
*/

/*! \enum QTextEdit::KeyboardAction

  This enum is used by doKeyboardAction() to specify which action
  should be executed:

  \value ActionBackspace  Delete the character to the left of the
  cursor.

  \value ActionDelete  Delete the character to the right of the cursor.

  \value ActionReturn  Split the paragraph at the cursor position.

  \value ActionKill If the cursor is not at the end of the paragraph,
  delete the text from the cursor position until the end of the
  paragraph. If the cursor is at the end of the paragraph, delete the
  hard line break at the end of the paragraph - this will cause this
  paragraph to be joined with the following paragraph.
*/

/*! \enum QTextEdit::VerticalAlignment

  This enum is used to set the vertical alignment of the text.

  \value AlignNormal Normal alignment
  \value AlignSuperScript Superscript
  \value AlignSubScript Subscript
*/

/*!  \fn void QTextEdit::copyAvailable (bool yes)

  This signal is emitted when text is selected or de-selected in the text
  edit.

  When text is selected this signal will be emitted with \a yes set to
  TRUE. If no text has been selected or if the selected text is
  de-selected this signal is emitted with \a yes set to FALSE.

    If \a yes is TRUE then copy() can be used to copy the selection to the
    clipboard. If \a yes is FALSE then copy() does nothing.

    \sa selectionChanged()
*/


/*!  \fn void QTextEdit::textChanged()

  This signal is emitted whenever the text in the text edit changes.

  \sa setText() append()
 */

/*!  \fn void QTextEdit::selectionChanged()

  This signal is emitted whenever the selection changes.

  \sa setSelection() copyAvailable()
*/

/*!  \fn QTextDocument *QTextEdit::document() const

  This function returns the QTextDocument which is used by the text
  edit.
*/

/*!  \fn void QTextEdit::setDocument( QTextDocument *doc )

  This function sets the QTextDocument which should be used by the text
  edit to \a doc. This can be used, for example, if you want to
  display a document using multiple views. You would create a
  QTextDocument and set it to the text edits which should display it.
  You would need to connect to the textChanged() and
  selectionChanged() signals of all the text edits and update them all
  accordingly (preferably with a slight delay for efficiency reasons).
*/

/*! \enum QTextEdit::CursorAction

  This enum is used by moveCursor() to specify in which direction
  the cursor should be moved:

  \value MoveBackward  Moves the cursor one character backward

  \value MoveWordBackward Moves the cursor one word backward

  \value MoveForward  Moves the cursor one character forward

  \value MoveWordForward Moves the cursor one word forward

  \value MoveUp  Moves the cursor up one line

  \value MoveDown  Moves the cursor down one line

  \value MoveLineStart  Moves the cursor to the beginning of the line

  \value MoveLineEnd Moves the cursor to the end of the line

  \value MoveHome  Moves the cursor to the beginning of the document

  \value MoveEnd Moves the cursor to the end of the document

  \value MovePgUp  Moves the cursor one page up

  \value MovePgDown  Moves the cursor one page down
*/


/*!
  \property QTextEdit::overwriteMode
  \brief the text edit's overwrite mode

  If FALSE characters entered by the user are inserted with any
  characters to the right being moved out of the way.
  If TRUE, the editor is in overwrite mode, i.e. characters entered by
  the user overwrite any characters to the right of the cursor position.
*/

/*! \fn void QTextEdit::setCurrentFont( const QFont &f )

  Sets the font of the current format to \a f.

  \sa font() setPointSize() setFamily()
*/

/*!
  \property QTextEdit::undoDepth
  \brief the depth of the undo history

  The maximum number of steps in the undo/redo history.

  \sa undo() redo()
*/

/*! \fn void QTextEdit::undoAvailable( bool yes )

  This signal is emitted when the availability of undo changes.  If \a
  yes is TRUE, then undo() will work until undoAvailable( FALSE ) is
  next emitted.

  \sa undo() undoDepth()
*/

/*! \fn void QTextEdit::modificationChanged( bool m )

  This signal is emitted when the modification of the document
  changed. If \a m is TRUE, the document was modified, otherwise the
  modification state has been reset to unmodified.

  \sa modified
*/

/*! \fn void QTextEdit::redoAvailable( bool yes )

  This signal is emitted when the availability of redo changes.  If \a
  yes is TRUE, then redo() will work until redoAvailable( FALSE ) is
  next emitted.

  \sa redo() undoDepth()
*/

/*! \fn void QTextEdit::currentFontChanged( const QFont &f )

  This signal is emitted if the font of the current format has changed.

  The new font is \a f.

  \sa setCurrentFont()
*/

/*! \fn void QTextEdit::currentColorChanged( const QColor &c )

  This signal is emitted if the color of the current format has changed.

  The new color is \a c.

  \sa setColor()
*/

/*! \fn void QTextEdit::currentVerticalAlignmentChanged( VerticalAlignment a )

  This signal is emitted if the vertical alignment of the current
  format has changed.

  The new vertical alignment is \a a.

  \sa setVerticalAlignment()
*/

/*! \fn void QTextEdit::currentAlignmentChanged( int a )

  This signal is emitted if the alignment of the current paragraph
  has changed.

  The new alignment is \a a.

  \sa setAlignment()
*/

/*! \fn void QTextEdit::cursorPositionChanged( QTextCursor *c )

  This signal is emitted if the position of the cursor changed. \a c
  points to the text cursor object.

  \sa setCursorPosition()
*/

/*! \overload void QTextEdit::cursorPositionChanged( int para, int pos )

  This signal is emitted if the position of the cursor changed. \a
  para contains the paragraph index and \a pos contains the character
  position within the paragraph.

  \sa setCursorPosition()
*/

/*! \fn void QTextEdit::returnPressed()

  This signal is emitted if the user pressed the Return or the Enter key.
*/

/*! \fn QTextCursor *QTextEdit::textCursor() const

  Returns the text edit's text cursor. QTextCursor is not in the
  public API, but in special circumstances you might wish to use it.
*/

/*!  Constructs an empty QTextEdit with parent \a parent and name \a
  name.
*/

QTextEdit::QTextEdit( QWidget *parent, const char *name )
    : QScrollView( parent, name, WStaticContents | WRepaintNoErase | WResizeNoErase ),
      doc( new QTextDocument( 0 ) ), undoRedoInfo( doc )
{
    init();
}

/*!
    Constructs a QTextEdit with parent \a parent and name \a name. The
    text edit will display the text \a text using context \a context.

    The \a context is a path which the text edit's QMimeSourceFactory
    uses to resolve the locations of files and images. It is passed to
    the mimeSourceFactory() when quering data.

    For example if the text contains an image tag,
    \c{<img src="image.png">}, and the context is "path/to/look/in", the
    QMimeSourceFactory will try to load the image from
    "path/to/look/in/image.png". If the tag was
    \c{<img src="/image.png">}, the context will not be used (because
    QMimeSourceFactory recognizes that we have used an absolute path)
    and will try to load "/image.png". The context is applied in exactly
    the same way to \e hrefs, for example,
    \c{<a href="target.html">Target</a>}, would resolve to
    "path/to/look/in/target.html".

*/

QTextEdit::QTextEdit( const QString& text, const QString& context,
		      QWidget *parent, const char *name)
    : QScrollView( parent, name, WStaticContents | WRepaintNoErase | WResizeNoErase ),
      doc( new QTextDocument( 0 ) ), undoRedoInfo( doc )
{
    init();
    setText( text, context );
}

/*! \reimp */

QTextEdit::~QTextEdit()
{
    delete undoRedoInfo.d;
    undoRedoInfo.d = 0;
    delete cursor;
    delete doc;
    delete d;
}

void QTextEdit::init()
{
    undoEnabled = TRUE;
    readonly = TRUE;
    setReadOnly( FALSE );
    d = new QTextEditPrivate;
    connect( doc, SIGNAL( minimumWidthChanged( int ) ),
	     this, SLOT( documentWidthChanged( int ) ) );

    mousePressed = FALSE;
    inDoubleClick = FALSE;
    modified = FALSE;
    onLink = QString::null;
    overWrite = FALSE;
    wrapMode = WidgetWidth;
    wrapWidth = -1;
    wPolicy = AtWhiteSpace;
    inDnD = FALSE;

    doc->setFormatter( new QTextFormatterBreakWords );
    currentFormat = doc->formatCollection()->defaultFormat();
    currentAlignment = Qt::AlignAuto;

    viewport()->setBackgroundMode( PaletteBase );
    viewport()->setAcceptDrops( TRUE );
    resizeContents( 0, doc->lastParag() ?
		    ( doc->lastParag()->paragId() + 1 ) * doc->formatCollection()->defaultFormat()->height() : 0 );

    setKeyCompression( TRUE );
    viewport()->setMouseTracking( TRUE );
#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
    cursor = new QTextCursor( doc );

    formatTimer = new QTimer( this );
    connect( formatTimer, SIGNAL( timeout() ),
	     this, SLOT( formatMore() ) );
    lastFormatted = doc->firstParag();

    scrollTimer = new QTimer( this );
    connect( scrollTimer, SIGNAL( timeout() ),
	     this, SLOT( doAutoScroll() ) );

    interval = 0;
    changeIntervalTimer = new QTimer( this );
    connect( changeIntervalTimer, SIGNAL( timeout() ),
	     this, SLOT( doChangeInterval() ) );

    cursorVisible = TRUE;
    blinkTimer = new QTimer( this );
    connect( blinkTimer, SIGNAL( timeout() ),
	     this, SLOT( blinkCursor() ) );

#ifndef QT_NO_DRAGANDDROP
    dragStartTimer = new QTimer( this );
    connect( dragStartTimer, SIGNAL( timeout() ),
	     this, SLOT( startDrag() ) );
#endif


    formatMore();

    blinkCursorVisible = FALSE;

    connect( this, SIGNAL( textChanged() ),
	     this, SLOT( setModified() ) );
    viewport()->setFocusProxy( this );
    viewport()->setFocusPolicy( WheelFocus );
    viewport()->installEventFilter( this );
    installEventFilter( this );
}

void QTextEdit::paintDocument( bool drawAll, QPainter *p, int cx, int cy, int cw, int ch )
{
    bool drawCur = hasFocus() || viewport()->hasFocus();
    if ( isReadOnly() || !cursorVisible )
	drawCur = FALSE;
    QColorGroup g = colorGroup();
    if ( doc->paper() )
	g.setBrush( QColorGroup::Base, *doc->paper() );

    if ( contentsY() == 0 ) {
	p->fillRect( contentsX(), contentsY(), visibleWidth(), doc->y(),
		     g.brush( QColorGroup::Base ) );
    }

    p->setBrushOrigin( -contentsX(), -contentsY() );

    lastFormatted = doc->draw( p, cx, cy, cw, ch, g, !drawAll, drawCur, cursor );

    if ( lastFormatted == doc->lastParag() )
	resizeContents( contentsWidth(), doc->height() );

    if ( contentsHeight() < visibleHeight() && ( !doc->lastParag() || doc->lastParag()->isValid() ) && drawAll )
	p->fillRect( 0, contentsHeight(), visibleWidth(),
		     visibleHeight() - contentsHeight(), g.brush( QColorGroup::Base ) );
}

/*! \reimp */

void QTextEdit::drawContents( QPainter *p, int cx, int cy, int cw, int ch )
{
    paintDocument( TRUE, p, cx, cy, cw, ch );
    int v;
    p->setPen( foregroundColor() );
    if ( document()->isPageBreakEnabled() &&  ( v = document()->flow()->pageSize() ) > 0 ) {
	int l = int(cy / v) * v;
	while ( l < cy + ch ) {
	    p->drawLine( cx, l, cx + cw - 1, l );
	    l += v;
	}
    }

}

/*! \reimp */

void QTextEdit::drawContents( QPainter * )
{
}

/*! \reimp */

bool QTextEdit::event( QEvent *e )
{
    if ( e->type() == QEvent::AccelOverride && !isReadOnly() ) {
	QKeyEvent* ke = (QKeyEvent*) e;
	if ( ke->state() == NoButton ) {
	    if ( ke->key() < Key_Escape ) {
		ke->accept();
	    } else {
		switch ( ke->key() ) {
		case Key_Return:
		case Key_Enter:
		case Key_Delete:
		case Key_Home:
		case Key_End:
		case Key_Backspace:
		    ke->accept();
		default:
		    break;
		}
	    }
	} else if ( ke->state() & ControlButton ) {
	    switch ( ke->key() ) {
// Those are too frequently used for application functionality
/*	    case Key_A:
	    case Key_B:
	    case Key_D:
	    case Key_E:
	    case Key_F:
	    case Key_H:
	    case Key_I:
	    case Key_K:
	    case Key_N:
	    case Key_P:
	    case Key_T:
*/
	    case Key_C:
	    case Key_V:
	    case Key_X:
	    case Key_Y:
	    case Key_Z:
	    case Key_Left:
	    case Key_Right:
	    case Key_Up:
	    case Key_Down:
	    case Key_Home:
	    case Key_End:
	    case Key_Tab:
#if defined (Q_WS_WIN)
	    case Key_Insert:
#endif
		ke->accept();
	    default:
		break;
	    }
	}
    }
    return QWidget::event( e );
}

/*!
    Processes the key event, \a e.
    By default key events are used to provide keyboard navigation and
    text editing.
*/

void QTextEdit::keyPressEvent( QKeyEvent *e )
{
    changeIntervalTimer->stop();
    interval = 10;

    if ( isReadOnly() ) {
	if ( !handleReadOnlyKeyEvent( e ) )
	    QScrollView::keyPressEvent( e );
	changeIntervalTimer->start( 100, TRUE );
	return;
    }


    bool selChanged = FALSE;
    for ( int i = 1; i < doc->numSelections(); ++i ) // start with 1 as we don't want to remove the Standard-Selection
	selChanged = doc->removeSelection( i ) || selChanged;

    if ( selChanged ) {
	cursor->parag()->document()->nextDoubleBuffered = TRUE;
	repaintChanged();
    }

    bool clearUndoRedoInfo = TRUE;

    switch ( e->key() ) {
    case Key_Left:
	moveCursor( e->state() & ControlButton ? MoveWordBackward : MoveBackward, e->state() & ShiftButton );
	break;
    case Key_Right:
	moveCursor( e->state() & ControlButton ? MoveWordForward : MoveForward, e->state() & ShiftButton );
	break;
    case Key_Up:
	moveCursor( e->state() & ControlButton ? MovePgUp : MoveUp, e->state() & ShiftButton );
	break;
    case Key_Down:
	moveCursor( e->state() & ControlButton ? MovePgDown : MoveDown, e->state() & ShiftButton );
	break;
    case Key_Home:
	moveCursor( e->state() & ControlButton ? MoveHome : MoveLineStart, e->state() & ShiftButton );
	break;
    case Key_End:
	moveCursor( e->state() & ControlButton ? MoveEnd : MoveLineEnd, e->state() & ShiftButton );
	break;
    case Key_Prior:
	moveCursor( MovePgUp, e->state() & ShiftButton );
	break;
    case Key_Next:
	moveCursor( MovePgDown, e->state() & ShiftButton );
	break;
    case Key_Return: case Key_Enter:
	if ( doc->hasSelection( QTextDocument::Standard, FALSE ) )
	    removeSelectedText();
#ifndef QT_NO_CURSOR
	viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	clearUndoRedoInfo = FALSE;
	doKeyboardAction( ActionReturn );
	emit returnPressed();
	break;
    case Key_Delete:
	if ( doc->hasSelection( QTextDocument::Standard, TRUE ) ) {
	    removeSelectedText();
	    break;
	}

	doKeyboardAction( ActionDelete );
	clearUndoRedoInfo = FALSE;

	break;
    case Key_Backspace:
	if ( doc->hasSelection( QTextDocument::Standard, TRUE ) ) {
	    removeSelectedText();
	    break;
	}

	if ( !cursor->parag()->prev() &&
	     cursor->atParagStart() )
	    break;

	doKeyboardAction( ActionBackspace );
	clearUndoRedoInfo = FALSE;

	break;
    case Key_F16: // Copy key on Sun keyboards
	copy();
	break;
    case Key_F18:  // Paste key on Sun keyboards
	paste();
	break;
    case Key_F20:  // Cut key on Sun keyboards
	cut();
	break;
    default: {
	    if ( e->text().length() &&
//		 !( e->state() & AltButton ) && !( e->state() & MetaButton ) &&
		 ( !e->ascii() || e->ascii() >= 32 ) ||
		 ( e->text() == "\t" && !( e->state() & ControlButton ) ) ) {
		clearUndoRedoInfo = FALSE;
		if ( e->key() == Key_Tab ) {
		    if ( cursor->index() == 0 && cursor->parag()->style() &&
			 cursor->parag()->style()->displayMode() == QStyleSheetItem::DisplayListItem ) {
			cursor->parag()->incDepth();
			drawCursor( FALSE );
			repaintChanged();
			drawCursor( TRUE );
			break;
		    }
		}
		if ( cursor->parag()->style() &&
		     cursor->parag()->style()->displayMode() == QStyleSheetItem::DisplayBlock &&
		     cursor->index() == 0 && ( e->text() == "-" || e->text() == "*" ) ) {
		    setParagType( QStyleSheetItem::DisplayListItem, QStyleSheetItem::ListDisc );
		} else {
		    insert( e->text(), TRUE, FALSE );
		}
		break;
	    }
	    if ( e->state() & ControlButton ) {
		switch ( e->key() ) {
		case Key_C: case Key_F16: // Copy key on Sun keyboards
		    copy();
		    break;
		case Key_V:
		    paste();
		    break;
		case Key_X:
		    cut();
		    break;
		case Key_I: case Key_T: case Key_Tab:
		    indent();
		    break;
		case Key_A:
#if defined(Q_WS_X11)
		    moveCursor( MoveLineStart, e->state() & ShiftButton );
#else
		    selectAll( TRUE );
#endif
		    break;
		case Key_B:
		    moveCursor( MoveBackward, e->state() & ShiftButton );
		    break;
		case Key_F:
		    moveCursor( MoveForward, e->state() & ShiftButton );
		    break;
		case Key_D:
		    if ( doc->hasSelection( QTextDocument::Standard ) ) {
			removeSelectedText();
			break;
		    }
		    doKeyboardAction( ActionDelete );
		    clearUndoRedoInfo = FALSE;
		    break;
		case Key_H:
		    if ( doc->hasSelection( QTextDocument::Standard ) ) {
			removeSelectedText();
			break;
		    }
		    if ( !cursor->parag()->prev() &&
			 cursor->atParagStart() )
			break;

		    doKeyboardAction( ActionBackspace );
		    clearUndoRedoInfo = FALSE;
		    break;
		case Key_E:
		    moveCursor( MoveLineEnd, e->state() & ShiftButton );
		    break;
		case Key_N:
		    moveCursor( MoveDown, e->state() & ShiftButton );
		    break;
		case Key_P:
		    moveCursor( MoveUp, e->state() & ShiftButton );
		    break;
		case Key_Z:
		    undo();
		    break;
		case Key_Y:
		    redo();
		    break;
		case Key_K:
		    doKeyboardAction( ActionKill );
		    break;
		case Key_Insert:
#if defined(Q_WS_WIN)
		    copy();
#endif
		    break;
		}
		break;
	    }
	}
    }

    emit cursorPositionChanged( cursor );
    emit cursorPositionChanged( cursor->parag()->paragId(), cursor->index() );
    if ( clearUndoRedoInfo )
	clearUndoRedo();
    changeIntervalTimer->start( 100, TRUE );
}

/*! \reimp */
void QTextEdit::imStartEvent( QIMEvent *e )
{
    d->preeditStart = cursor->index();
    e->accept();
}

/*! \reimp */
void QTextEdit::imComposeEvent( QIMEvent *e )
{
    if ( d->preeditLength > 0 && cursor->parag() )
	cursor->parag()->remove( d->preeditStart, d->preeditLength );
    cursor->setIndex( d->preeditStart );
    insert( e->text(), TRUE, FALSE );
    d->preeditLength = e->text().length();
    cursor->setIndex( d->preeditStart + e->cursorPos() );
    repaintChanged();
    e->accept();
}

/*! \reimp */
void QTextEdit::imEndEvent( QIMEvent *e )
{
    if ( d->preeditLength > 0 && cursor->parag() )
	cursor->parag()->remove( d->preeditStart, d->preeditLength );
    d->preeditLength = e->text().length();
    cursor->setIndex( d->preeditStart );
    insert( e->text(), TRUE, FALSE );
    d->preeditStart = d->preeditLength = -1;
    repaintChanged();
    e->accept();
}


/*!
  Executes keyboard action \a action. This is normally called by
  a key event handler.
*/

void QTextEdit::doKeyboardAction( KeyboardAction action )
{
    if ( isReadOnly() )
	return;

    if ( cursor->nestedDepth() != 0 ) // #### for 3.0, disable editing of tables as this is not advanced enough
	return;

    lastFormatted = cursor->parag();
    drawCursor( FALSE );
    bool doUpdateCurrentFormat = TRUE;

    switch ( action ) {
    case ActionDelete: {
	checkUndoRedoInfo( UndoRedoInfo::Delete );
	if ( !undoRedoInfo.valid() ) {
	    undoRedoInfo.id = cursor->parag()->paragId();
	    undoRedoInfo.index = cursor->index();
	    undoRedoInfo.d->text = QString::null;
	}
	undoRedoInfo.d->text += cursor->parag()->at( cursor->index() )->c;
	if ( cursor->parag()->at( cursor->index() )->format() ) {
	    cursor->parag()->at( cursor->index() )->format()->addRef();
	    undoRedoInfo.d->text.at( undoRedoInfo.d->text.length() - 1 ).setFormat( cursor->parag()->at( cursor->index() )->format() );
	}
	QTextParag *old = cursor->parag();
	if ( cursor->remove() ) {
	    if ( old != cursor->parag() && lastFormatted == old )
		lastFormatted = cursor->parag() ? cursor->parag()->prev() : 0;
	    undoRedoInfo.d->text += "\n";
	}
    } break;
    case ActionBackspace:
	if ( cursor->parag()->style() && cursor->parag()->style()->displayMode() == QStyleSheetItem::DisplayListItem &&
	     cursor->index() == 0 ) {
	    cursor->parag()->decDepth();
	    lastFormatted = cursor->parag();
	    repaintChanged();
	    drawCursor( TRUE );
	    return;
	}
	checkUndoRedoInfo( UndoRedoInfo::Delete );
	if ( !undoRedoInfo.valid() ) {
	    undoRedoInfo.id = cursor->parag()->paragId();
	    undoRedoInfo.index = cursor->index();
	    undoRedoInfo.d->text = QString::null;
	}
	cursor->gotoLeft();
	undoRedoInfo.d->text.prepend( QString( cursor->parag()->at( cursor->index() )->c ) );
	if ( cursor->parag()->at( cursor->index() )->format() ) {
	    cursor->parag()->at( cursor->index() )->format()->addRef();
	    undoRedoInfo.d->text.at( 0 ).setFormat( cursor->parag()->at( cursor->index() )->format() );
	}
	undoRedoInfo.index = cursor->index();
	if ( cursor->remove() ) {
	    undoRedoInfo.d->text.remove( 0, 1 );
	    undoRedoInfo.d->text.prepend( "\n" );
	    undoRedoInfo.index = cursor->index();
	    undoRedoInfo.id = cursor->parag()->paragId();
	}
	lastFormatted = cursor->parag();
	break;
    case ActionReturn: {
	checkUndoRedoInfo( UndoRedoInfo::Return );
	if ( !undoRedoInfo.valid() ) {
	    undoRedoInfo.id = cursor->parag()->paragId();
	    undoRedoInfo.index = cursor->index();
	    undoRedoInfo.d->text = QString::null;
	}
	undoRedoInfo.d->text += "\n";
	cursor->splitAndInsertEmptyParag();
	if ( cursor->parag()->prev() ) {
	    lastFormatted = cursor->parag()->prev();
	    lastFormatted->invalidate( 0 );
	}
	doUpdateCurrentFormat = FALSE;
    } break;
    case ActionKill:
	checkUndoRedoInfo( UndoRedoInfo::Delete );
	if ( !undoRedoInfo.valid() ) {
	    undoRedoInfo.id = cursor->parag()->paragId();
	    undoRedoInfo.index = cursor->index();
	    undoRedoInfo.d->text = QString::null;
	}
	if ( cursor->atParagEnd() ) {
	    undoRedoInfo.d->text += cursor->parag()->at( cursor->index() )->c;
	    if ( cursor->parag()->at( cursor->index() )->format() ) {
		cursor->parag()->at( cursor->index() )->format()->addRef();
		undoRedoInfo.d->text.at( undoRedoInfo.d->text.length() - 1 ).setFormat( cursor->parag()->at( cursor->index() )->format() );
	    }
	    QTextParag *old = cursor->parag();
	    if ( cursor->remove() ) {
		if ( old != cursor->parag() && lastFormatted == old )
		    lastFormatted = cursor->parag() ? cursor->parag()->prev() : 0;
		undoRedoInfo.d->text += "\n";
	    }
	} else {
	    int oldLen = undoRedoInfo.d->text.length();
	    undoRedoInfo.d->text += cursor->parag()->string()->toString().mid( cursor->index() );
	    for ( int i = cursor->index(); i < cursor->parag()->length(); ++i ) {
		if ( cursor->parag()->at( i )->format() ) {
		    cursor->parag()->at( i )->format()->addRef();
		    undoRedoInfo.d->text.at( oldLen + i - cursor->index() ).setFormat( cursor->parag()->at( i )->format() );
		}
	    }
	    undoRedoInfo.d->text.remove( undoRedoInfo.d->text.length() - 1, 1 );
	    cursor->killLine();
	}
	break;
    }

    formatMore();
    repaintChanged();
    ensureCursorVisible();
    drawCursor( TRUE );

    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }

    if ( doUpdateCurrentFormat )
	updateCurrentFormat();
    emit textChanged();
}

void QTextEdit::readFormats( QTextCursor &c1, QTextCursor &c2, int oldLen, QTextString &text, bool fillStyles )
{
    c2.restoreState();
    c1.restoreState();
    if ( c1.parag() == c2.parag() ) {
	for ( int i = c1.index(); i < c2.index(); ++i ) {
	    if ( c1.parag()->at( i )->format() ) {
		c1.parag()->at( i )->format()->addRef();
		text.at( oldLen + i - c1.index() ).setFormat( c1.parag()->at( i )->format() );
	    }
	}
	if ( fillStyles ) {
	    undoRedoInfo.oldAligns[ 0 ] = c1.parag()->alignment();
	    undoRedoInfo.oldStyles << c1.parag()->styleSheetItems();
	    undoRedoInfo.oldListStyles << c1.parag()->listStyle();
	}
    } else {
	int lastIndex = oldLen;
	int i;
	for ( i = c1.index(); i < c1.parag()->length(); ++i ) {
	    if ( c1.parag()->at( i )->format() ) {
		c1.parag()->at( i )->format()->addRef();
		text.at( lastIndex ).setFormat( c1.parag()->at( i )->format() );
		lastIndex++;
	    }
	}
	QTextParag *p = c1.parag()->next();
	while ( p && p != c2.parag() ) {
	    for ( int i = 0; i < p->length(); ++i ) {
		if ( p->at( i )->format() ) {
		    p->at( i )->format()->addRef();
		    text.at( i + lastIndex ).setFormat( p->at( i )->format() );
		}
	    }
	    lastIndex += p->length();
	    p = p->next();
	}
	for ( i = 0; i < c2.index(); ++i ) {
	    if ( c2.parag()->at( i )->format() ) {
		c2.parag()->at( i )->format()->addRef();
		text.at( i + lastIndex ).setFormat( c2.parag()->at( i )->format() );
	    }
	}
	if ( fillStyles ) {
	    QTextParag *p = c1.parag();
	    i = 0;
	    while ( p ) {
		if ( i < (int)undoRedoInfo.oldAligns.size() )
		    undoRedoInfo.oldAligns[ i ] = p->alignment();
		undoRedoInfo.oldStyles << p->styleSheetItems();
		undoRedoInfo.oldListStyles << p->listStyle();
		if ( p == c2.parag() )
		    break;
		p = p->next();
		++i;
	    }
	}
    }
}

/*! Removes the selection \a selNum (by default 0). This does not
  remove the selected text.

  \sa removeSelectedText()
*/

void QTextEdit::removeSelection( int selNum )
{
    doc->removeSelection( selNum );
    repaintChanged();
}

/*!  Deletes the selected text (i.e. the default selection's text) of
  the selection \a selNum (by default, 0). If there is no selected text
  nothing happens.

  \sa selectedText removeSelection()
*/

void QTextEdit::removeSelectedText( int selNum )
{
    if ( isReadOnly() )
	return;

    QTextCursor c1 = doc->selectionStartCursor( selNum );
    QTextCursor c2 = doc->selectionEndCursor( selNum );

    // ### no support for editing tables yet
    if ( c1.nestedDepth() || c2.nestedDepth() )
	return;

    for ( int i = 1; i < (int)doc->numSelections(); ++i )
	doc->removeSelection( i );

    drawCursor( FALSE );
    checkUndoRedoInfo( UndoRedoInfo::RemoveSelected );
    if ( !undoRedoInfo.valid() ) {
	doc->selectionStart( selNum, undoRedoInfo.id, undoRedoInfo.index );
	undoRedoInfo.d->text = QString::null;
    }
    int oldLen = undoRedoInfo.d->text.length();
    undoRedoInfo.d->text = doc->selectedText( selNum, FALSE );
    undoRedoInfo.oldAligns.resize( undoRedoInfo.oldAligns.size() + QMAX( 0, c2.parag()->paragId() - c1.parag()->paragId() + 1 ) );
    readFormats( c1, c2, oldLen, undoRedoInfo.d->text, TRUE );
    doc->removeSelectedText( selNum, cursor );
    ensureCursorVisible();
    lastFormatted = cursor->parag();
    formatMore();
    repaintChanged();
    ensureCursorVisible();
    drawCursor( TRUE );
    clearUndoRedo();
    emit textChanged();
#if defined(Q_WS_WIN)
    // there seems to be a problem with repainting or erasing the area
    // of the scrollview which is not the contents on windows
    if ( contentsHeight() < visibleHeight() )
	viewport()->repaint( 0, contentsHeight(), visibleWidth(), visibleHeight() - contentsHeight(), TRUE );
#endif
#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

/*!  Moves the text cursor according to \a action. This is normally
  used by some key event handler. \a select specifies whether the text
  between the current cursor position and the new position should be
  selected.
*/

void QTextEdit::moveCursor( CursorAction action, bool select )
{
    drawCursor( FALSE );
    if ( select ) {
	if ( !doc->hasSelection( QTextDocument::Standard ) )
	    doc->setSelectionStart( QTextDocument::Standard, cursor );
	moveCursor( action );
	if ( doc->setSelectionEnd( QTextDocument::Standard, cursor ) ) {
	    cursor->parag()->document()->nextDoubleBuffered = TRUE;
	    repaintChanged();
	} else {
	    drawCursor( TRUE );
	}
	ensureCursorVisible();
	emit selectionChanged();
	emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
    } else {
	bool redraw = doc->removeSelection( QTextDocument::Standard );
	moveCursor( action );
	if ( !redraw ) {
	    ensureCursorVisible();
	    drawCursor( TRUE );
	} else {
	    cursor->parag()->document()->nextDoubleBuffered = TRUE;
	    repaintChanged();
	    ensureCursorVisible();
	    drawCursor( TRUE );
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	}
	if ( redraw ) {
	    emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
	    emit selectionChanged();
	}
    }

    drawCursor( TRUE );
    updateCurrentFormat();
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

/*! \overload
*/

void QTextEdit::moveCursor( CursorAction action )
{
    resetInputContext();
    switch ( action ) {
    case MoveBackward:
	cursor->gotoLeft();
	break;
    case MoveWordBackward:
	cursor->gotoWordLeft();
	break;
    case MoveForward:
	cursor->gotoRight();
	break;
    case MoveWordForward:
	cursor->gotoWordRight();
	break;
    case MoveUp:
	cursor->gotoUp();
	break;
    case MovePgUp:
	cursor->gotoPageUp( visibleHeight() );
	break;
    case MoveDown:
	cursor->gotoDown();
	break;
    case MovePgDown:
	cursor->gotoPageDown( visibleHeight() );
	break;
    case MoveLineStart:
	cursor->gotoLineStart();
	break;
    case MoveHome:
	cursor->gotoHome();
	break;
    case MoveLineEnd:
	cursor->gotoLineEnd();
	break;
    case MoveEnd:
	cursor->gotoEnd();
	break;
    }

    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
    updateCurrentFormat();
}

/*! \reimp */

void QTextEdit::resizeEvent( QResizeEvent *e )
{
    QScrollView::resizeEvent( e );
}

/*! \reimp */

void QTextEdit::viewportResizeEvent( QResizeEvent *e )
{
    QScrollView::viewportResizeEvent( e );
    if ( e->oldSize().width() != e->size().width() )
	doResize();
}

/*!
  Ensures that the cursor is visible by scrolling the text edit if
  necessary.

  \sa setCursorPosition()
*/

void QTextEdit::ensureCursorVisible()
{
    lastFormatted = cursor->parag();
    formatMore();
    QTextStringChar *chr = cursor->parag()->at( cursor->index() );
    int h = cursor->parag()->lineHeightOfChar( cursor->index() );
    int x = cursor->parag()->rect().x() + chr->x + cursor->offsetX();
    int y = 0; int dummy;
    cursor->parag()->lineHeightOfChar( cursor->index(), &dummy, &y );
    y += cursor->parag()->rect().y() + cursor->offsetY();
    int w = 1;
    ensureVisible( x, y + h / 2, w, h / 2 + 2 );
}

/*!
    \internal
*/
void QTextEdit::drawCursor( bool visible )
{
    if ( !isUpdatesEnabled() ||
	 !viewport()->isUpdatesEnabled() ||
	 !cursor->parag() ||
	 !cursor->parag()->isValid() ||
	 ( visible && !hasFocus() && !viewport()->hasFocus() && !inDnD ) ||
	 isReadOnly() )
	return;

    QPainter p( viewport() );
    QRect r( cursor->topParag()->rect() );
    cursor->parag()->setChanged( TRUE );
    p.translate( -contentsX() + cursor->totalOffsetX(), -contentsY() + cursor->totalOffsetY() );
    QPixmap *pix = 0;
    QColorGroup cg( colorGroup() );
    if ( cursor->parag()->background() )
	cg.setBrush( QColorGroup::Base, *cursor->parag()->background() );
    else if ( doc->paper() )
	cg.setBrush( QColorGroup::Base, *doc->paper() );
    p.setBrushOrigin( -contentsX(), -contentsY() );
    cursor->parag()->document()->nextDoubleBuffered = TRUE;
    if ( !cursor->nestedDepth() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	int dist = 5;
	if ( ( cursor->parag()->alignment() & Qt::AlignJustify ) == Qt::AlignJustify )
	    dist = 50;
	int x = r.x() - cursor->totalOffsetX() + cursor->x() - dist;
	x = QMAX( x, 0 );
	p.setClipRect( QRect( x - contentsX(),
			      r.y() - cursor->totalOffsetY() + cursor->y() - contentsY(), 2 * dist, h ) );
	doc->drawParag( &p, cursor->parag(), x,
			r.y() - cursor->totalOffsetY() + cursor->y(), 2 * dist, h, pix, cg, visible, cursor );
    } else {
	doc->drawParag( &p, cursor->parag(), r.x() - cursor->totalOffsetX(),
			r.y() - cursor->totalOffsetY(), r.width(), r.height(),
			pix, cg, visible, cursor );
    }
    cursorVisible = visible;
}

enum {
    IdUndo = 0,
    IdRedo = 1,
    IdCut = 2,
    IdCopy = 3,
    IdPaste = 4,
    IdClear = 5,
    IdSelectAll = 6
};

/*! \reimp */

void QTextEdit::contentsWheelEvent( QWheelEvent *e )
{
    if ( isReadOnly() ) {
	if ( e->state() & ControlButton ) {
	    if ( e->delta() > 0 )
		zoomOut();
	    else if ( e->delta() < 0 )
		zoomIn();
	    return;
	}
    }
    QScrollView::contentsWheelEvent( e );
}

/*! \reimp */

void QTextEdit::contentsMousePressEvent( QMouseEvent *e )
{
    clearUndoRedo();
    QTextCursor oldCursor = *cursor;
    QTextCursor c = *cursor;
    mousePos = e->pos();
    mightStartDrag = FALSE;
    pressedLink = QString::null;

    if ( e->button() == LeftButton ) {
	mousePressed = TRUE;
	drawCursor( FALSE );
	placeCursor( e->pos() );
	ensureCursorVisible();

	if ( isReadOnly() && linksEnabled() ) {
	    QTextCursor c = *cursor;
	    placeCursor( e->pos(), &c );
	    if ( c.parag() && c.parag()->at( c.index() ) &&
		 c.parag()->at( c.index() )->format()->isAnchor() ) {
		pressedLink = c.parag()->at( c.index() )->format()->anchorHref();
	    }
	}

#ifndef QT_NO_DRAGANDDROP
	if ( doc->inSelection( QTextDocument::Standard, e->pos() ) ) {
	    mightStartDrag = TRUE;
	    drawCursor( TRUE );
	    dragStartTimer->start( QApplication::startDragTime(), TRUE );
	    dragStartPos = e->pos();
	    return;
	}
#endif

	bool redraw = FALSE;
	if ( doc->hasSelection( QTextDocument::Standard ) ) {
	    if ( !( e->state() & ShiftButton ) ) {
		redraw = doc->removeSelection( QTextDocument::Standard );
		doc->setSelectionStart( QTextDocument::Standard, cursor );
	    } else {
		redraw = doc->setSelectionEnd( QTextDocument::Standard, cursor ) || redraw;
	    }
	} else {
	    if ( !( e->state() & ShiftButton ) ) {
		doc->setSelectionStart( QTextDocument::Standard, cursor );
	    } else {
		doc->setSelectionStart( QTextDocument::Standard, &c );
		redraw = doc->setSelectionEnd( QTextDocument::Standard, cursor ) || redraw;
	    }
	}

	for ( int i = 1; i < doc->numSelections(); ++i ) // start with 1 as we don't want to remove the Standard-Selection
	    redraw = doc->removeSelection( i ) || redraw;

	if ( !redraw ) {
	    drawCursor( TRUE );
	} else {
	    repaintChanged();
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	}
#ifndef QT_NO_CLIPBOARD
    } else if ( e->button() == MidButton ) {
	if (QApplication::clipboard()->supportsSelection()) {
	    // only do middle-click pasting on systems that have selections (ie. X11)
	    QApplication::clipboard()->setSelectionMode(TRUE);
	    paste();
	    QApplication::clipboard()->setSelectionMode(FALSE);
	}
#endif
    }

    if ( *cursor != oldCursor )
	updateCurrentFormat();
}

/*! \reimp */

void QTextEdit::contentsMouseMoveEvent( QMouseEvent *e )
{
    if ( mousePressed ) {
#ifndef QT_NO_DRAGANDDROP
	if ( mightStartDrag ) {
	    dragStartTimer->stop();
	    if ( ( e->pos() - dragStartPos ).manhattanLength() > QApplication::startDragDistance() )
		startDrag();
#ifndef QT_NO_CURSOR
	    if ( !isReadOnly() )
		viewport()->setCursor( ibeamCursor );
#endif
	    return;
	}
#endif
	mousePos = e->pos();
	doAutoScroll();
	oldMousePos = mousePos;
    }

#ifndef QT_NO_CURSOR
    if ( !isReadOnly() && !mousePressed ) {
	if ( doc->hasSelection( QTextDocument::Standard ) && doc->inSelection( QTextDocument::Standard, e->pos() ) )
	    viewport()->setCursor( arrowCursor );
	else
	    viewport()->setCursor( ibeamCursor );
    }
#endif

    if ( isReadOnly() && linksEnabled() ) {
	QTextCursor c = *cursor;
	placeCursor( e->pos(), &c );
#ifndef QT_NO_NETWORKPROTOCOL
	if ( c.parag() && c.parag()->at( c.index() ) &&
	     c.parag()->at( c.index() )->format()->isAnchor() &&
	     !c.parag()->at( c.index() )->format()->anchorHref().isEmpty() ) {
	    if ( c.index() < c.parag()->length() - 1 )
		onLink = c.parag()->at( c.index() )->format()->anchorHref();
	    else
		onLink = QString::null;
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( onLink.isEmpty() ? arrowCursor : pointingHandCursor );
#endif
	    QUrl u( doc->context(), onLink, TRUE );
	    emitHighlighted( u.toString( FALSE, FALSE ) );
	} else {
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	    onLink = QString::null;
	    emitHighlighted( QString::null );
	}
#endif
    }
}

/*! \reimp */

void QTextEdit::contentsMouseReleaseEvent( QMouseEvent * )
{
    QTextCursor oldCursor = *cursor;
    if ( scrollTimer->isActive() )
	scrollTimer->stop();
#ifndef QT_NO_DRAGANDDROP
    if ( dragStartTimer->isActive() )
	dragStartTimer->stop();
    if ( mightStartDrag ) {
	selectAll( FALSE );
	mousePressed = FALSE;
    }
#endif
    if ( mousePressed ) {
	mousePressed = FALSE;
#ifndef QT_NO_CLIPBOARD
	if (QApplication::clipboard()->supportsSelection()) {
	    QApplication::clipboard()->setSelectionMode(TRUE);
	    // only do middle-click selection on systems that support it (ie. X11)
	    if ( !doc->selectedText( QTextDocument::Standard ).isEmpty() )
		doc->copySelectedText( QTextDocument::Standard );
	    QApplication::clipboard()->setSelectionMode(FALSE);
	}
#endif
    }
    emit cursorPositionChanged( cursor );
    emit cursorPositionChanged( cursor->parag()->paragId(), cursor->index() );
    if ( oldCursor != *cursor )
	updateCurrentFormat();
    inDoubleClick = FALSE;

#ifndef QT_NO_NETWORKPROTOCOL
    if ( !onLink.isEmpty() && onLink == pressedLink && linksEnabled() ) {
	QUrl u( doc->context(), onLink, TRUE );
	emitLinkClicked( u.toString( FALSE, FALSE ) );
#ifndef QT_NO_CURSOR
	viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
    }
#endif
    drawCursor( TRUE );
    if ( !doc->hasSelection( QTextDocument::Standard, TRUE ) )
	doc->removeSelection( QTextDocument::Standard );

    emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
    emit selectionChanged();
}

/*! \reimp */

void QTextEdit::contentsMouseDoubleClickEvent( QMouseEvent * )
{
    QTextCursor c1 = *cursor;
    QTextCursor c2 = *cursor;
    if ( cursor->index() > 0 && !cursor->parag()->at( cursor->index()-1 )->c.isSpace() )
	c1.gotoWordLeft();
    if ( !cursor->parag()->at( cursor->index() )->c.isSpace() && !cursor->atParagEnd() )
	c2.gotoWordRight();

    doc->setSelectionStart( QTextDocument::Standard, &c1 );
    doc->setSelectionEnd( QTextDocument::Standard, &c2 );

    *cursor = c2;

    repaintChanged();

    inDoubleClick = TRUE;
    mousePressed = TRUE;
}

#ifndef QT_NO_DRAGANDDROP

/*! \reimp */

void QTextEdit::contentsDragEnterEvent( QDragEnterEvent *e )
{
    if ( isReadOnly() || !QTextDrag::canDecode( e ) ) {
	e->ignore();
	return;
    }
    e->acceptAction();
    inDnD = TRUE;
}

/*! \reimp */

void QTextEdit::contentsDragMoveEvent( QDragMoveEvent *e )
{
    if ( isReadOnly() || !QTextDrag::canDecode( e ) ) {
	e->ignore();
	return;
    }
    drawCursor( FALSE );
    placeCursor( e->pos(),  cursor );
    drawCursor( TRUE );
    e->acceptAction();
}

/*! \reimp */

void QTextEdit::contentsDragLeaveEvent( QDragLeaveEvent * )
{
    inDnD = FALSE;
}

/*! \reimp */

void QTextEdit::contentsDropEvent( QDropEvent *e )
{
    if ( isReadOnly() )
	return;
    inDnD = FALSE;
    e->acceptAction();
    QString text;
    bool intern = FALSE;
    if ( QTextDrag::decode( e, text ) ) {
	if ( ( e->source() == this ||
	       e->source() == viewport() ) &&
	     e->action() == QDropEvent::Move ) {
	    removeSelectedText();
	    intern = TRUE;
	} else {
	    doc->removeSelection( QTextDocument::Standard );
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	}
	drawCursor( FALSE );
	placeCursor( e->pos(), cursor );
	drawCursor( TRUE );
	if ( !cursor->nestedDepth() ) {
	    insert( text, FALSE, TRUE, FALSE );
	} else {
	    if ( intern )
		undo();
	    e->ignore();
	}
    }
}

#endif

/*! \reimp */
void QTextEdit::contentsContextMenuEvent( QContextMenuEvent *e )
{
    clearUndoRedo();
    mousePressed = FALSE;

    e->accept();
#ifndef QT_NO_POPUPMENU
    QPopupMenu *popup = createPopupMenu( e->pos() );
    if ( !popup )
	popup = createPopupMenu();
    if ( !popup )
	return;
    int r = popup->exec( e->globalPos() );
    delete popup;

    if ( r == d->id[ IdClear ] )
	clear();
    else if ( r == d->id[ IdSelectAll ] )
	selectAll();
    else if ( r == d->id[ IdUndo ] )
	undo();
    else if ( r == d->id[ IdRedo ] )
	redo();
#ifndef QT_NO_CLIPBOARD
    else if ( r == d->id[ IdCut ] )
	cut();
    else if ( r == d->id[ IdCopy ] )
	copy();
    else if ( r == d->id[ IdPaste ] )
	paste();
#endif
#endif
}

void QTextEdit::doAutoScroll()
{
    if ( !mousePressed )
	return;

    QPoint pos( mapFromGlobal( QCursor::pos() ) );
    drawCursor( FALSE );
    QTextCursor oldCursor = *cursor;
    placeCursor( viewportToContents( pos ) );
    if ( inDoubleClick ) {
	QTextCursor cl = *cursor;
	cl.gotoWordLeft();
	QTextCursor cr = *cursor;
	cr.gotoWordRight();

	int diff = QABS( oldCursor.parag()->at( oldCursor.index() )->x - mousePos.x() );
	int ldiff = QABS( cl.parag()->at( cl.index() )->x - mousePos.x() );
	int rdiff = QABS( cr.parag()->at( cr.index() )->x - mousePos.x() );


	if ( cursor->parag()->lineStartOfChar( cursor->index() ) !=
	     oldCursor.parag()->lineStartOfChar( oldCursor.index() ) )
	    diff = 0xFFFFFF;

	if ( rdiff < diff && rdiff < ldiff )
	    *cursor = cr;
	else if ( ldiff < diff && ldiff < rdiff )
	    *cursor = cl;
	else
	    *cursor = oldCursor;

    }
    ensureCursorVisible();

    bool redraw = FALSE;
    if ( doc->hasSelection( QTextDocument::Standard ) ) {
	redraw = doc->setSelectionEnd( QTextDocument::Standard, cursor ) || redraw;
    }

    if ( !redraw ) {
	drawCursor( TRUE );
    } else {
	repaintChanged();
	drawCursor( TRUE );
    }

    if ( !scrollTimer->isActive() && pos.y() < 0 || pos.y() > height() )
	scrollTimer->start( 100, FALSE );
    else if ( scrollTimer->isActive() && pos.y() >= 0 && pos.y() <= height() )
	scrollTimer->stop();
}

/*!
  Places the cursor \a c at the character which is closest to position
  \a pos (in contents coordinates). If \a c is 0, the default text
  cursor is used.

  \sa setCursorPosition()
*/

void QTextEdit::placeCursor( const QPoint &pos, QTextCursor *c )
{
    if ( !c )
	c = cursor;

    resetInputContext();
    c->restoreState();
    QTextParag *s = doc->firstParag();
    c->place( pos,  s );
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

void QTextEdit::formatMore()
{
    if ( !lastFormatted )
	return;

    int bottom = contentsHeight();
    int lastBottom = -1;
    int to = !sender() ? 2 : 20;
    bool firstVisible = FALSE;
    QRect cr( contentsX(), contentsY(), visibleWidth(), visibleHeight() );
    for ( int i = 0; ( i < to || firstVisible ) && lastFormatted; ++i ) {
	lastFormatted->format();
	if ( i == 0 )
	    firstVisible = lastFormatted->rect().intersects( cr );
	else if ( firstVisible )
	    firstVisible = lastFormatted->rect().intersects( cr );
	bottom = QMAX( bottom, lastFormatted->rect().top() +
		       lastFormatted->rect().height() );
	lastBottom = lastFormatted->rect().top() + lastFormatted->rect().height();
	lastFormatted = lastFormatted->next();
	if ( lastFormatted )
	    lastBottom = -1;
    }

    if ( bottom > contentsHeight() )
	resizeContents( contentsWidth(), QMAX( doc->height(), bottom ) );
    else if ( lastBottom != -1 && lastBottom < contentsHeight() )
	resizeContents( contentsWidth(), QMAX( doc->height(), lastBottom ) );

    if ( lastFormatted )
	formatTimer->start( interval, TRUE );
    else
	interval = QMAX( 0, interval );
}

void QTextEdit::doResize()
{
    if ( wrapMode != WidgetWidth )
	return;
    doc->setMinimumWidth( -1, 0 );
    resizeContents( 0, 0 );
    doc->setWidth( visibleWidth() );
    wrapWidth = visibleWidth();
    doc->invalidate();
    repaintContents( FALSE );
    lastFormatted = doc->firstParag();
    interval = 0;
    formatMore();
}

/*! \internal */

void QTextEdit::doChangeInterval()
{
    interval = 0;
}

/*! \reimp */

bool QTextEdit::eventFilter( QObject *o, QEvent *e )
{
    if ( !o || !e )
	return TRUE;

    if ( o == this || o == viewport() ) {
	if ( e->type() == QEvent::FocusIn ) {
	    resetInputContext();
	    blinkTimer->start( QApplication::cursorFlashTime() / 2 );
	    drawCursor( TRUE );
	    return TRUE;
	} else if ( e->type() == QEvent::FocusOut ) {
	    blinkTimer->stop();
	    drawCursor( FALSE );
	    return TRUE;
	}
    }

    return QScrollView::eventFilter( o, e );
}

/*!
  Inserts \a text at the current cursor position. If \a indent is TRUE,
  the paragraph is re-indented. If \a checkNewLine is TRUE, newline
  characters in \a text result in hard line breaks (i.e. new
  paragraphs). If \a checkNewLine is FALSE the behaviour of the editor
  is undefined if the \a text contains newlines. If \a removeSelected is
  TRUE, any selected text (in selection 0) is removed before the text is
  inserted.

  \sa paste() pasteSubType()
*/

void QTextEdit::insert( const QString &text, bool indent, bool checkNewLine, bool removeSelected )
{
    if ( cursor->nestedDepth() != 0 ) // #### for 3.0, disable editing of tables as this is not advanced enough
	return;
    QString txt( text );
    drawCursor( FALSE );
    if ( !isReadOnly() && doc->hasSelection( QTextDocument::Standard ) && removeSelected )
	removeSelectedText();
    QTextCursor c2 = *cursor;
    checkUndoRedoInfo( UndoRedoInfo::Insert );
    if ( !undoRedoInfo.valid() ) {
	undoRedoInfo.id = cursor->parag()->paragId();
	undoRedoInfo.index = cursor->index();
	undoRedoInfo.d->text = QString::null;
    }
    int oldLen = undoRedoInfo.d->text.length();
    lastFormatted = checkNewLine && cursor->parag()->prev() ?
		    cursor->parag()->prev() : cursor->parag();
    QTextCursor oldCursor = *cursor;
    cursor->insert( txt, checkNewLine );
    if ( doc->useFormatCollection() ) {
	doc->setSelectionStart( QTextDocument::Temp, &oldCursor );
	doc->setSelectionEnd( QTextDocument::Temp, cursor );
	doc->setFormat( QTextDocument::Temp, currentFormat, QTextFormat::Format );
	doc->removeSelection( QTextDocument::Temp );
    }

    if ( indent && ( txt == "{" || txt == "}" || txt == ":" || txt == "#" ) )
	cursor->indent();
    formatMore();
    repaintChanged();
    ensureCursorVisible();
    drawCursor( TRUE );
    undoRedoInfo.d->text += txt;

    if ( !doc->preProcessor() ) {
	for ( int i = 0; i < (int)txt.length(); ++i ) {
	    if ( txt[ i ] != '\n' && c2.parag()->at( c2.index() )->format() ) {
		c2.parag()->at( c2.index() )->format()->addRef();
		undoRedoInfo.d->text.setFormat( oldLen + i, c2.parag()->at( c2.index() )->format(), TRUE );
	    }
	    c2.gotoRight();
	}
    }

    emit textChanged();
    if ( !removeSelected ) {
	doc->setSelectionStart( QTextDocument::Standard, &oldCursor );
	doc->setSelectionEnd( QTextDocument::Standard, cursor );
	repaintChanged();
    }
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
    doc->invalidateOriginalText();
}

/*! Inserts \a text in the paragraph \a para and position \a index */

void QTextEdit::insertAt( const QString &text, int para, int index )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return;
    QTextCursor tmp = *cursor;
    cursor->setParag( p );
    cursor->setIndex( index );
    insert( text, FALSE, TRUE, FALSE );
    *cursor = tmp;
    removeSelection( QTextDocument::Standard );
}

/*! Inserts \a text as the paragraph at position \a para. If \a para
  is -1, the text is appended.
*/

void QTextEdit::insertParagraph( const QString &text, int para )
{
    QTextParag *p = doc->paragAt( para );
    if ( p ) {
	QTextCursor tmp( doc );
	tmp.setParag( p );
	tmp.setIndex( 0 );
	tmp.insert( text, TRUE );
	tmp.splitAndInsertEmptyParag();
	repaintChanged();
    } else {
	append( text );
    }
}

/*! Removes the paragraph \a para */

void QTextEdit::removeParagraph( int para )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return;
    if ( p == doc->firstParag() && p == doc->lastParag() ) {
	p->remove( 0, p->length() - 1 );
	repaintChanged();
	return;
    }
    drawCursor( FALSE );
    bool resetCursor = cursor->parag() == p;
    if ( p->prev() )
	p->prev()->setNext( p->next() );
    else
	doc->setFirstParag( p->next() );
    if ( p->next() )
	p->next()->setPrev( p->prev() );
    else
	doc->setLastParag( p->prev() );
    QTextParag *start = p->next();
    int h = p->rect().height();
    delete p;
    p = start;
    int dy = -h;
    while ( p ) {
	p->setParagId( p->prev() ? p->prev()->paragId() + 1 : 0 );
	p->move( dy );
	p->invalidate( 0 );
	p->setEndState( -1 );
	p = p->next();
    }

    if ( resetCursor ) {
	cursor->setParag( doc->firstParag() );
	cursor->setIndex( 0 );
    }
    repaintChanged();
    drawCursor( TRUE );
}

/*!
  Undoes the last operation.

  If there is no operation to undo, e.g. there is no undo step in the
  undo/redo history, nothing happens.

  \sa undoAvailable() redo() undoDepth()
*/

void QTextEdit::undo()
{
    if ( isReadOnly() || !doc->commands()->isUndoAvailable() || !undoEnabled )
	return;

    for ( int i = 0; i < (int)doc->numSelections(); ++i )
	doc->removeSelection( i );

#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif

    clearUndoRedo();
    drawCursor( FALSE );
    QTextCursor *c = doc->undo( cursor );
    if ( !c ) {
	drawCursor( TRUE );
	return;
    }
    lastFormatted = 0;
    ensureCursorVisible();
    repaintChanged();
    drawCursor( TRUE );
    emit textChanged();
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

/*!
  Redoes the last operation.

  If there is no operation to redo, e.g. there is no redo step in the
  undo/redo history, nothing happens.

  \sa redoAvailable() undo() undoDepth()
*/

void QTextEdit::redo()
{
    if ( isReadOnly() || !doc->commands()->isRedoAvailable() || !undoEnabled )
	return;

    for ( int i = 0; i < (int)doc->numSelections(); ++i )
	doc->removeSelection( i );

#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif

    clearUndoRedo();
    drawCursor( FALSE );
    QTextCursor *c = doc->redo( cursor );
    if ( !c ) {
	drawCursor( TRUE );
	return;
    }
    lastFormatted = 0;
    ensureCursorVisible();
    repaintChanged();
    ensureCursorVisible();
    drawCursor( TRUE );
    emit textChanged();
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

/*!
    Pastes the text from the clipboard into the text edit at the current
    cursor position. Only plain text is pasted.

    If there is no text in the clipboard nothing happens.

    \sa pasteSubType() cut() QTextEdit::copy()
*/

void QTextEdit::paste()
{
#ifndef QT_NO_CLIPBOARD
    if ( isReadOnly() )
	return;
    pasteSubType( "plain" );
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
#endif
}

void QTextEdit::checkUndoRedoInfo( UndoRedoInfo::Type t )
{
    if ( undoRedoInfo.valid() && t != undoRedoInfo.type ) {
	clearUndoRedo();
    }
    undoRedoInfo.type = t;
}

/*! Repaints any paragraphs that have changed.

    Although used extensively internally you shouldn't need to call this
    yourself.
*/

void QTextEdit::repaintChanged()
{
    if ( !isUpdatesEnabled() || !viewport()->isUpdatesEnabled() )
	return;
    QPainter p( viewport() );
    p.translate( -contentsX(), -contentsY() );
    paintDocument( FALSE, &p, contentsX(), contentsY(), visibleWidth(), visibleHeight() );
}

/*!
    Copies the selected text (from selection 0) to the clipboard and
    deletes it from the text edit.

    If there is no selected text (in selection 0) nothing happens.

    \sa QTextEdit::copy() paste() pasteSubType()
*/

void QTextEdit::cut()
{
    if ( isReadOnly() )
	return;

    if ( doc->hasSelection( QTextDocument::Standard ) ) {
	doc->copySelectedText( QTextDocument::Standard );
	removeSelectedText();
    }
    if ( hasFocus() || viewport()->hasFocus() ) {
	int h = cursor->parag()->lineHeightOfChar( cursor->index() );
	QFont f = cursor->parag()->at( cursor->index() )->format()->font();
	setMicroFocusHint( cursor->x() - contentsX() + frameWidth(),
			   cursor->y() + cursor->parag()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
    }
}

/*! Copies any selected text (from selection 0) to the clipboard.

    \sa hasSelectedText() copyAvailable()
 */

void QTextEdit::copy()
{
    if ( !doc->selectedText( QTextDocument::Standard ).isEmpty() )
	doc->copySelectedText( QTextDocument::Standard );
}

/*!
  Re-indents the current paragraph.
*/

void QTextEdit::indent()
{
    if ( isReadOnly() )
	return;

    drawCursor( FALSE );
    if ( !doc->hasSelection( QTextDocument::Standard ) )
	cursor->indent();
    else
	doc->indentSelection( QTextDocument::Standard );
    repaintChanged();
    drawCursor( TRUE );
    emit textChanged();
}

/*! Reimplemented to allow tabbing through links.
    If \a n is TRUE the tab moves the focus to the next child; if \a n
    is FALSE the tab moves the focus to the previous child.
    Returns TRUE if the focus was moved; otherwise returns FALSE.
 */

bool QTextEdit::focusNextPrevChild( bool n )
{
    if ( !isReadOnly() || !linksEnabled() )
	return FALSE;
    bool b = doc->focusNextPrevChild( n );
    if ( b ) {
	repaintChanged();
	makeParagVisible( doc->focusIndicator.parag );
    }
    return b;
}

/*!
    \internal

  This functions sets the current format to \a f. Only the fields of \a
  f which are specified by the \a flags are used.
*/

void QTextEdit::setFormat( QTextFormat *f, int flags )
{
    if ( doc->hasSelection( QTextDocument::Standard ) ) {
	drawCursor( FALSE );
	QString str = doc->selectedText( QTextDocument::Standard );
	QTextCursor c1 = doc->selectionStartCursor( QTextDocument::Standard );
	QTextCursor c2 = doc->selectionEndCursor( QTextDocument::Standard );
	clearUndoRedo();
	undoRedoInfo.type = UndoRedoInfo::Format;
	undoRedoInfo.id = c1.parag()->paragId();
	undoRedoInfo.index = c1.index();
	undoRedoInfo.eid = c2.parag()->paragId();
	undoRedoInfo.eindex = c2.index();
	undoRedoInfo.d->text = str;
	readFormats( c1, c2, 0, undoRedoInfo.d->text );
	undoRedoInfo.format = f;
	undoRedoInfo.flags = flags;
	clearUndoRedo();
	doc->setFormat( QTextDocument::Standard, f, flags );
	repaintChanged();
	formatMore();
	drawCursor( TRUE );
	emit textChanged();
    }
    if ( currentFormat && currentFormat->key() != f->key() ) {
	currentFormat->removeRef();
	currentFormat = doc->formatCollection()->format( f );
	if ( currentFormat->isMisspelled() ) {
	    currentFormat->removeRef();
	    currentFormat = doc->formatCollection()->format( currentFormat->font(), currentFormat->color() );
	}
	emit currentFontChanged( currentFormat->font() );
	emit currentColorChanged( currentFormat->color() );
	emit currentVerticalAlignmentChanged( (VerticalAlignment)currentFormat->vAlign() );
	if ( cursor->index() == cursor->parag()->length() - 1 ) {
	    currentFormat->addRef();
	    cursor->parag()->string()->setFormat( cursor->index(), currentFormat, TRUE );
	    if ( cursor->parag()->length() == 1 ) {
		cursor->parag()->invalidate( 0 );
		cursor->parag()->format();
		repaintChanged();
	    }
	}
    }
}

/*! \reimp */

void QTextEdit::setPalette( const QPalette &p )
{
    QScrollView::setPalette( p );
    if ( textFormat() == PlainText ) {
	QTextFormat *f = doc->formatCollection()->defaultFormat();
	f->setColor( colorGroup().text() );
	repaintContents( FALSE );
    }
}

/*!
  Sets the paragraph style of the current paragraph
  to \a dm. If \a dm is QStyleSheetItem::DisplayListItem, the
  type of the list item is set to \a listStyle.

  \sa setAlignment()
*/

void QTextEdit::setParagType( QStyleSheetItem::DisplayMode dm, QStyleSheetItem::ListStyle listStyle )
{
    if ( isReadOnly() )
	return;

    drawCursor( FALSE );
    if ( !doc->hasSelection( QTextDocument::Standard ) ) {
	clearUndoRedo();
	undoRedoInfo.type = UndoRedoInfo::ParagType;
	QValueList< QPtrVector<QStyleSheetItem> > oldStyles;
	undoRedoInfo.oldStyles.clear();
	undoRedoInfo.oldStyles << cursor->parag()->styleSheetItems();
	undoRedoInfo.oldListStyles.clear();
	undoRedoInfo.oldListStyles << cursor->parag()->listStyle();
	undoRedoInfo.list = dm == QStyleSheetItem::DisplayListItem;
	undoRedoInfo.listStyle = listStyle;
	undoRedoInfo.id = cursor->parag()->paragId();
	undoRedoInfo.eid = cursor->parag()->paragId();
	undoRedoInfo.d->text = " ";
	undoRedoInfo.index = 1;
	clearUndoRedo();
	cursor->parag()->setList( dm == QStyleSheetItem::DisplayListItem, listStyle );
	repaintChanged();
    } else {
	QTextParag *start = doc->selectionStart( QTextDocument::Standard );
	QTextParag *end = doc->selectionEnd( QTextDocument::Standard );
	lastFormatted = start;
	clearUndoRedo();
	undoRedoInfo.type = UndoRedoInfo::ParagType;
	undoRedoInfo.id = start->paragId();
	undoRedoInfo.eid = end->paragId();
	undoRedoInfo.list = dm == QStyleSheetItem::DisplayListItem;
	undoRedoInfo.listStyle = listStyle;
	undoRedoInfo.oldStyles.clear();
	undoRedoInfo.oldListStyles.clear();
	while ( start ) {
	    undoRedoInfo.oldStyles << start->styleSheetItems();
	    undoRedoInfo.oldListStyles << start->listStyle();
	    start->setList( dm == QStyleSheetItem::DisplayListItem, listStyle );
	    if ( start == end )
		break;
	    start = start->next();
	}
	undoRedoInfo.d->text = " ";
	undoRedoInfo.index = 1;
	clearUndoRedo();
	repaintChanged();
	formatMore();
    }
    drawCursor( TRUE );
    emit textChanged();
}

/*!
  Sets the alignment of the current paragraph to \a a. Valid alignments
  are \c Qt::AlignLeft, \c Qt::AlignRight, Qt::AlignJustify and
  Qt::AlignCenter (which centers horizontally).

  \sa setParagType()
*/

void QTextEdit::setAlignment( int a )
{
    if ( isReadOnly() || block_set_alignment )
	return;

    drawCursor( FALSE );
    if ( !doc->hasSelection( QTextDocument::Standard ) ) {
	if ( cursor->parag()->alignment() != a ) {
	    clearUndoRedo();
	    undoRedoInfo.type = UndoRedoInfo::Alignment;
	    QMemArray<int> oa( 1 );
	    oa[ 0 ] = cursor->parag()->alignment();
	    undoRedoInfo.oldAligns = oa;
	    undoRedoInfo.newAlign = a;
	    undoRedoInfo.id = cursor->parag()->paragId();
	    undoRedoInfo.eid = cursor->parag()->paragId();
	    undoRedoInfo.d->text = " ";
	    undoRedoInfo.index = 1;
	    clearUndoRedo();
	    cursor->parag()->setAlignment( a );
	    repaintChanged();
	}
    } else {
	QTextParag *start = doc->selectionStart( QTextDocument::Standard );
	QTextParag *end = doc->selectionEnd( QTextDocument::Standard );
	lastFormatted = start;
	int len = end->paragId() - start->paragId() + 1;
	clearUndoRedo();
	undoRedoInfo.type = UndoRedoInfo::Alignment;
	undoRedoInfo.id = start->paragId();
	undoRedoInfo.eid = end->paragId();
	QMemArray<int> oa( QMAX( 0, len ) );
	int i = 0;
	while ( start ) {
	    if ( i < (int)oa.size() )
		oa[ i ] = start->alignment();
	    start->setAlignment( a );
	    if ( start == end )
		break;
	    start = start->next();
	    ++i;
	}
	undoRedoInfo.oldAligns = oa;
	undoRedoInfo.newAlign = a;
	undoRedoInfo.d->text = " ";
	undoRedoInfo.index = 1;
	clearUndoRedo();
	repaintChanged();
	formatMore();
    }
    drawCursor( TRUE );
    if ( currentAlignment != a ) {
	currentAlignment = a;
	emit currentAlignmentChanged( currentAlignment );
    }
    emit textChanged();
}

void QTextEdit::updateCurrentFormat()
{
    int i = cursor->index();
    if ( i > 0 )
	--i;
    if ( currentFormat->key() != cursor->parag()->at( i )->format()->key() && doc->useFormatCollection() ) {
	if ( currentFormat )
	    currentFormat->removeRef();
	currentFormat = doc->formatCollection()->format( cursor->parag()->at( i )->format() );
	if ( currentFormat->isMisspelled() ) {
	    currentFormat->removeRef();
	    currentFormat = doc->formatCollection()->format( currentFormat->font(), currentFormat->color() );
	}
	emit currentFontChanged( currentFormat->font() );
	emit currentColorChanged( currentFormat->color() );
	emit currentVerticalAlignmentChanged( (VerticalAlignment)currentFormat->vAlign() );
    }

    if ( currentAlignment != cursor->parag()->alignment() ) {
	currentAlignment = cursor->parag()->alignment();
	block_set_alignment = TRUE;
	emit currentAlignmentChanged( currentAlignment );
	block_set_alignment = FALSE;
    }
}

/*!
    If \a b is TRUE sets the current format to italic; otherwise sets
    the current format to non-italic.

    \sa italic()
*/

void QTextEdit::setItalic( bool b )
{
    QTextFormat f( *currentFormat );
    f.setItalic( b );
    setFormat( &f, QTextFormat::Italic );
}

/*!
    If \a b is TRUE sets the current format to bold; otherwise sets the
    current format to non-bold.

    \sa bold()
*/

void QTextEdit::setBold( bool b )
{
    QTextFormat f( *currentFormat );
    f.setBold( b );
    setFormat( &f, QTextFormat::Bold );
}

/*!
    If \a b is TRUE sets the current format to underline; otherwise sets
    the current format to non-underline.

    \sa underline()
*/

void QTextEdit::setUnderline( bool b )
{
    QTextFormat f( *currentFormat );
    f.setUnderline( b );
    setFormat( &f, QTextFormat::Underline );
}

/*!
  Sets the font family of the current format to \a fontFamily.

  \sa family() setCurrentFont()
*/

void QTextEdit::setFamily( const QString &fontFamily )
{
    QTextFormat f( *currentFormat );
    f.setFamily( fontFamily );
    setFormat( &f, QTextFormat::Family );
}

/*!
  Sets the point size of the current format to \a s.

  Note that if \a s is zero or negative, the behaviour of this
  function is not defined.

  \sa pointSize() setCurrentFont() setFamily()
*/

void QTextEdit::setPointSize( int s )
{
    QTextFormat f( *currentFormat );
    f.setPointSize( s );
    setFormat( &f, QTextFormat::Size );
}

/*!
  Sets the color of the current format, i.e. of the text, to \a c.

  \sa color() setPaper()
*/

void QTextEdit::setColor( const QColor &c )
{
    QTextFormat f( *currentFormat );
    f.setColor( c );
    setFormat( &f, QTextFormat::Color );
}

/*!
  Sets the vertical alignment of the current format, i.e. of the text, to \a a.

  \sa color() setPaper()
*/

void QTextEdit::setVerticalAlignment( VerticalAlignment a )
{
    QTextFormat f( *currentFormat );
    f.setVAlign( (QTextFormat::VerticalAlignment)a );
    setFormat( &f, QTextFormat::VAlign );
}

void QTextEdit::setFontInternal( const QFont &f_ )
{
    QTextFormat f( *currentFormat );
    f.setFont( f_ );
    setFormat( &f, QTextFormat::Font );
}


QString QTextEdit::text() const
{
    if ( isReadOnly() )
	return doc->originalText();
    return doc->text();
}

/*!
    \overload
    Returns the text of paragraph \a para.

    If textFormat() is \c RichText the text will contain HTML
    formatting tags.
*/

QString QTextEdit::text( int para ) const
{
    return doc->text( para );
}

/*!
    \overload

  Changes the text of the text edit to the string \a text and the
  context to \a context. Any previous text is removed.

  \a text may be interpreted either as plain text or as rich text,
  depending on the textFormat(). The default setting is \c AutoText,
  i.e. the text edit autodetects the format from \a text.

  The optional \a context is a path which the text edit's
  QMimeSourceFactory uses to resolve the locations of files and images.
  (See \l{QTextEdit::QTextEdit()}.) It is passed to the text edit's
  QMimeSourceFactory when quering data.

  \sa text(), setTextFormat()
*/

void QTextEdit::setText( const QString &text, const QString &context )
{
    emit undoAvailable( FALSE );
    emit redoAvailable( FALSE );
    undoRedoInfo.clear();
    doc->commands()->clear();

    lastFormatted = 0;
    cursor->restoreState();
    doc->setText( text, context );
    doc->setMinimumWidth( -1, 0 );
    resizeContents( 0, 0 );
    cursor->setDocument( doc );
    cursor->setParag( doc->firstParag() );
    cursor->setIndex( 0 );

    if ( qApp->font() != QScrollView::font() )
	setFont( QScrollView::font() );

    repaintContents( FALSE );
    emit textChanged();
    formatMore();
    updateCurrentFormat();
}

/*!
  \property QTextEdit::text
  \brief the text edit's text

  The text in the text edit.

  On setting, any previous text is deleted.

  The text may be interpreted either as plain text or as rich text,
  depending on the textFormat(). The default setting is \c AutoText,
  i.e. the text edit autodetects the format of the text.

  \sa textFormat
*/


/*!
  \property QTextEdit::readOnly
  \brief whether the text edit is read-only

  In a read-only text edit the user can only navigate through the text
  and select text; modifying the text is not possible.
*/

/*!
    Finds the next occurrence of the string, \a expr, starting from
    character position \e *\a index within paragraph \e *\a para. Both
    \a index and \a para must be non-null int pointers.

    If \e *\a para and \e *\a index are both 0 the search begins from
    the start of the text. If \a cs is TRUE the search is case
    sensitive, otherwise it is case insensitive. If \a wo is TRUE the
    search looks for whole word matches only; otherwise it searches for
    any matching text. If \a forward is TRUE (the default) the search
    works forward from the starting position to the end of the text,
    otherwise it works backwards to the beginning of the text.

    If \a expr is found the function returns TRUE and sets \e *\a para
    to the number of the paragraph in which the first character of the
    match was found and sets \e *\a index to the index position of that
    character within the \e *\a para.

    If \a expr is not found the function returns FALSE and the contents
    of \a index and \a para are undefined.
*/

bool QTextEdit::find( const QString &expr, bool cs, bool wo, bool forward,
		      int *para, int *index )
{
    drawCursor( FALSE );
    doc->removeSelection( QTextDocument::Standard );
#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
    bool found = doc->find( expr, cs, wo, forward, para, index, cursor );
    ensureCursorVisible();
    drawCursor( TRUE );
    repaintChanged();
    return found;
}

void QTextEdit::blinkCursor()
{
    if ( !cursorVisible )
	return;
    bool cv = cursorVisible;
    blinkCursorVisible = !blinkCursorVisible;
    drawCursor( blinkCursorVisible );
    cursorVisible = cv;
}

/*!
  Sets the cursor to position \a index in paragraph \a para.

  \sa getCursorPosition()
*/

void QTextEdit::setCursorPosition( int para, int index )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return;

    if ( index > p->length() - 1 )
	index = p->length() - 1;

    drawCursor( FALSE );
    cursor->setParag( p );
    cursor->setIndex( index );
    ensureCursorVisible();
    drawCursor( TRUE );
    emit cursorPositionChanged( cursor );
    emit cursorPositionChanged( cursor->parag()->paragId(), cursor->index() );
}

/*!
  This function sets the \e *\a para and \e *\a index parameters to the
  current cursor position. \a para and \a index must be non-null int
  pointers.

  \sa setCursorPosition()
 */

void QTextEdit::getCursorPosition( int *para, int *index ) const
{
    if ( !para || !index )
	return;
    *para = cursor->parag()->paragId();
    *index = cursor->index();
}

/*!  Sets a selection which starts at position \a indexFrom in
  paragraph \a paraFrom and ends at position \a indexTo in paragraph
  \a paraTo. Existing selections which have a different id (selNum)
  are not removed, existing selections which have the same id as \a
  selNum are removed.

  Uses the selection settings of selection \a selNum. If \a selNum is 0,
  this is the default selection.

  \sa getSelection() selectedText
*/

void QTextEdit::setSelection( int paraFrom, int indexFrom,
			      int paraTo, int indexTo, int selNum )
{
    if ( doc->hasSelection( selNum ) ) {
	doc->removeSelection( selNum );
	repaintChanged();
    }
    if ( selNum > doc->numSelections() - 1 )
	doc->addSelection( selNum );
    QTextParag *p1 = doc->paragAt( paraFrom );
    if ( !p1 )
	return;
    QTextParag *p2 = doc->paragAt( paraTo );
    if ( !p2 )
	return;

    if ( indexFrom > p1->length() - 1 )
	indexFrom = p1->length() - 1;
    if ( indexTo > p2->length() - 1 )
	indexTo = p2->length() - 1;

    drawCursor( FALSE );
    QTextCursor c = *cursor;
    c.setParag( p1 );
    c.setIndex( indexFrom );
    cursor->setParag( p2 );
    cursor->setIndex( indexTo );
    doc->setSelectionStart( selNum, &c );
    doc->setSelectionEnd( selNum, cursor );
    repaintChanged();
    ensureCursorVisible();
    drawCursor( TRUE );
}

/*!
    If there is a selection, \e *\a paraFrom is set to the number of the
    paragraph in which the selection begins and \e *\a paraTo is set to
    the number of the paragraph in which the selection ends. (They could
    be the same.) \e *\a indexFrom is set to the index at which the
    selection begins within \e *\a paraFrom, and \e *\a indexTo is set to
    the index at which the selection ends within \e *\a paraTo.

    If there is no selection, \e *\a paraFrom, \e *\a indexFrom, \e *\a
    paraTo and \e *\a indexTo are all set to -1.

    \a paraFrom, \a indexFrom, \a paraTo and \a indexTo must be non-null
    int pointers.

    The \a selNum is the number of the selection (multiple selections
    are supported). It defaults to 0 (the default selection).

    \sa setSelection() selectedText
*/

void QTextEdit::getSelection( int *paraFrom, int *indexFrom,
			      int *paraTo, int *indexTo, int selNum ) const
{
    if ( !paraFrom || !paraTo || !indexFrom || !indexTo )
	return;
    if ( !doc->hasSelection( selNum ) ) {
	*paraFrom = -1;
	*indexFrom = -1;
	*paraTo = -1;
	*indexTo = -1;
	return;
    }

    doc->selectionStart( selNum, *paraFrom, *indexFrom );
    doc->selectionEnd( selNum, *paraTo, *indexTo );
}

/*!
  \property QTextEdit::textFormat
  \brief the text format: rich text, plain text or auto text

  The text format is one of the following:
  \list
  \i PlainText - all characters, except newlines, are displayed
  verbatim, including spaces. Whenever a newline appears in the text the
  text edit inserts a hard line break and begins a new paragraph.
  \i RichText - rich text rendering. The available styles are
  defined in the default stylesheet QStyleSheet::defaultSheet().
  \i AutoText - this is the default. The text edit autodetects
  which rendering style is best, \c PlainText or \c RichText. This is
  done by using the QStyleSheet::mightBeRichText() function.
  \endlist
*/

void QTextEdit::setTextFormat( TextFormat format )
{
    doc->setTextFormat( format );
}

Qt::TextFormat QTextEdit::textFormat() const
{
    return doc->textFormat();
}

/*! Returns the number of paragraphs in the text.
 */

int QTextEdit::paragraphs() const
{
    return doc->lastParag()->paragId() + 1;
}

/*! Returns the number of lines in paragraph \a para.
 */

int QTextEdit::linesOfParagraph( int para ) const
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return -1;
    return p->lines();
}

/*! Returns the length of the paragraph \a para (number of characters)
  */

int QTextEdit::paragraphLength( int para ) const
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return -1;
    return p->length() - 1;
}

/*! Returns the number of lines in the text edit.

  \warning This function may be slow. Lines change all the time during
  word wrapping, so this function has to iterate over all the paragraphs
  and get the number of lines from each one individually.
*/

int QTextEdit::lines() const
{
    QTextParag *p = doc->firstParag();
    int l = 0;
    while ( p ) {
	l += p->lines();
	p = p->next();
    }

    return l;
}

/*!
    Returns the line number of the line in paragraph \a para in which
    the character at position \a index appears. The \a index position is
    relative to the beginning of the paragraph. If there is no such
    paragraph or no such character at the \a index position (e.g. the
    index is out of range) -1 is returned.
*/

int QTextEdit::lineOfChar( int para, int index )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return -1;

    int idx, line;
    QTextStringChar *c = p->lineStartOfChar( index, &idx, &line );
    if ( !c )
	return -1;

    return line;
}

void QTextEdit::setModified( bool m )
{
    if ( modified != m )
	emit modificationChanged( m );
    modified = m;
    if ( modified ) {
	disconnect( this, SIGNAL( textChanged() ),
		    this, SLOT( setModified() ) );
    } else {
	connect( this, SIGNAL( textChanged() ),
		 this, SLOT( setModified() ) );
    }
}

/*! \property QTextEdit::modified
  \brief whether the document has been modified by the user
*/

bool QTextEdit::isModified() const
{
    return modified;
}

void QTextEdit::setModified()
{
    setModified( TRUE );
}

/*!
    Returns TRUE if the current format is italic; otherwise returns FALSE.

    \sa setItalic()
*/

bool QTextEdit::italic() const
{
    return currentFormat->font().italic();
}

/*!
    Returns TRUE if the current format is bold; otherwise returns FALSE.

    \sa setBold()
*/

bool QTextEdit::bold() const
{
    return currentFormat->font().bold();
}

/*!
    Returns TRUE if the current format is underlined; otherwise returns
    FALSE.

    \sa setUnderline()
*/

bool QTextEdit::underline() const
{
    return currentFormat->font().underline();
}

/*!
  Returns the font family of the current format.

  \sa setFamily() setCurrentFont() setPointSize()
*/

QString QTextEdit::family() const
{
    return currentFormat->font().family();
}

/*!
  Returns the point size of the font of the current format.

  \sa setFamily() setCurrentFont() setPointSize()

*/

int QTextEdit::pointSize() const
{
    return currentFormat->font().pointSize();
}

/*!
  Returns the color of the current format.

  \sa setColor() setPaper()
*/

QColor QTextEdit::color() const
{
    return currentFormat->color();
}

/*!
  Returns the font of the current format.

  \sa setCurrentFont() setFamily() setPointSize()

*/

QFont QTextEdit::font() const
{
    return currentFormat->font();
}

/*!
  Returns the alignment of the current paragraph.

  \sa setAlignment()
*/

int QTextEdit::alignment() const
{
    return currentAlignment;
}

void QTextEdit::startDrag()
{
#ifndef QT_NO_DRAGANDDROP
    mousePressed = FALSE;
    inDoubleClick = FALSE;
    QDragObject *drag = new QTextDrag( doc->selectedText( QTextDocument::Standard ), viewport() );
    if ( isReadOnly() ) {
	drag->dragCopy();
    } else {
	if ( drag->drag() && QDragObject::target() != this && QDragObject::target() != viewport() )
	    removeSelectedText();
    }
#endif
}

/*!
    If \a select is TRUE (the default), all the text is selected as
    selection 0.
    If \a select is FALSE any selected text is unselected, i.e., the
    default selection (selection 0) is cleared.

  \sa selectedText
*/

void QTextEdit::selectAll( bool select )
{
    if ( !select )
	doc->removeSelection( QTextDocument::Standard );
    else
	doc->selectAll( QTextDocument::Standard );
    repaintChanged();
    emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
    emit selectionChanged();
#ifndef QT_NO_CURSOR
    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}

void QTextEdit::UndoRedoInfo::clear()
{
    if ( valid() ) {
	if ( type == Insert || type == Return )
	    doc->addCommand( new QTextInsertCommand( doc, id, index, d->text.rawData(), oldStyles, oldListStyles, oldAligns ) );
	else if ( type == Format )
	    doc->addCommand( new QTextFormatCommand( doc, id, index, eid, eindex, d->text.rawData(), format, flags ) );
	else if ( type == Alignment )
	    doc->addCommand( new QTextAlignmentCommand( doc, id, eid, newAlign, oldAligns ) );
	else if ( type == ParagType )
	    doc->addCommand( new QTextParagTypeCommand( doc, id, eid, list, listStyle, oldStyles, oldListStyles ) );
	else if ( type != Invalid )
	    doc->addCommand( new QTextDeleteCommand( doc, id, index, d->text.rawData(), oldStyles, oldListStyles, oldAligns ) );
    }
    d->text = QString::null;
    id = -1;
    index = -1;
    oldStyles.clear();
    oldListStyles.clear();
    oldAligns.resize( 0 );
}


/*!
    If there is some selected text (in selection 0) it is deleted. If
    there is no selected text (in selection 0) the character to the
    right of the text cursor is deleted.

    \sa removeSelectedText() cut()

*/

void QTextEdit::del()
{
    if ( doc->hasSelection( QTextDocument::Standard ) ) {
	removeSelectedText();
	return;
    }

    doKeyboardAction( ActionDelete );
}


QTextEdit::UndoRedoInfo::UndoRedoInfo( QTextDocument *dc )
    : type( Invalid ), doc( dc )
{
    d = new QUndoRedoInfoPrivate;
    d->text = QString::null;
    id = -1;
    index = -1;
}

QTextEdit::UndoRedoInfo::~UndoRedoInfo()
{
    delete d;
}

bool QTextEdit::UndoRedoInfo::valid() const
{
    return d->text.length() > 0	 && id >= 0 && index >= 0;
}

/*!
    \internal

  Resets the current format to the default format.
*/

void QTextEdit::resetFormat()
{
    setAlignment( Qt::AlignAuto );
    setParagType( QStyleSheetItem::DisplayBlock, QStyleSheetItem::ListDisc );
    setFormat( doc->formatCollection()->defaultFormat(), QTextFormat::Format );
}

/*! Returns the QStyleSheet which is currently used in this text edit.

    \sa setStyleSheet()
 */

QStyleSheet* QTextEdit::styleSheet() const
{
    return doc->styleSheet();
}

/*! Sets the stylesheet to use with this text edit to \a styleSheet.

    \sa styleSheet()
 */

void QTextEdit::setStyleSheet( QStyleSheet* styleSheet )
{
    doc->setStyleSheet( styleSheet );
}

/*!
  \property QTextEdit::paper
  \brief the background (paper) brush.

  The brush that is currently used to draw the background of the
  text edit. The initial setting is an empty brush.
 */

void QTextEdit::setPaper( const QBrush& pap )
{
    doc->setPaper( new QBrush( pap ) );
    viewport()->setBackgroundColor( pap.color() );
    updateContents();
}

QBrush QTextEdit::paper() const
{
    if ( doc->paper() )
	return *doc->paper();
    return QBrush();
}

/*!
  \property QTextEdit::linkUnderline
  \brief whether hypertext links will be underlined

  If TRUE hypertext links will be displayed underlined. If FALSE
  links will not be displayed underlined.
*/

void QTextEdit::setLinkUnderline( bool b )
{
    if ( b == doc->underlineLinks() )
	return;
    doc->setUnderlineLinks( b );
    updateStyles();
}

bool QTextEdit::linkUnderline() const
{
    return doc->underlineLinks();
}

/*! Sets the text edit's mimesource factory to \a factory. See
    QMimeSourceFactory for further details.

    \sa mimeSourceFactory()
 */

void QTextEdit::setMimeSourceFactory( QMimeSourceFactory* factory )
{
    doc->setMimeSourceFactory( factory );
}

/*! Returns the QMimeSourceFactory which is currently used by this
  text edit.

  \sa setMimeSourceFactory()
*/

QMimeSourceFactory* QTextEdit::mimeSourceFactory() const
{
    return doc->mimeSourceFactory();
}

/*!
    Returns how many pixels high the text edit needs to be to display
    all the text if the text edit is \a w pixels wide.
*/

int QTextEdit::heightForWidth( int w ) const
{
    int oldw = doc->width();
    doc->doLayout( 0, w );
    int h = doc->height();
    doc->setWidth( oldw );
    doc->invalidate();
    ( (QTextEdit*)this )->formatMore();
    return h;
}

/*! Appends the text \a text to the end of the text edit.
 */

void QTextEdit::append( const QString &text )
{
    doc->removeSelection( QTextDocument::Standard );
    TextFormat f = doc->textFormat();
    if ( f == AutoText ) {
	if ( QStyleSheet::mightBeRichText( text ) )
	    f = RichText;
	else
	    f = PlainText;
    }
    if ( f == PlainText ) {
	QTextCursor oldc( *cursor );
	cursor->gotoEnd();
	if ( cursor->index() > 0 )
	    cursor->splitAndInsertEmptyParag();
	insert( text, FALSE, TRUE );
	*cursor = oldc;
    } else if ( f == RichText ) {
	doc->setRichTextInternal( text );
	repaintChanged();
    }
}

/*! \property QTextEdit::hasSelectedText
  \brief whether some text is selected in selection 0
 */

bool QTextEdit::hasSelectedText() const
{
    return doc->hasSelection( QTextDocument::Standard );
}

/*!\property QTextEdit::selectedText
   \brief The selected text (from selection 0) or an empty string if
   there is no currently selected text (in selection 0).

   The text is always returned as \c PlainText regardless of the text
   format. In a future version of Qt an HTML subset \e may be returned
   depending on the text format.

   \sa hasSelectedText
 */

QString QTextEdit::selectedText() const
{
    return doc->selectedText( QTextDocument::Standard );
}

bool QTextEdit::handleReadOnlyKeyEvent( QKeyEvent *e )
{
    switch( e->key() ) {
    case Key_Down:
	setContentsPos( contentsX(), contentsY() + 10 );
	break;
    case Key_Up:
	setContentsPos( contentsX(), contentsY() - 10 );
	break;
    case Key_Left:
	setContentsPos( contentsX() - 10, contentsY() );
	break;
    case Key_Right:
	setContentsPos( contentsX() + 10, contentsY() );
	break;
    case Key_PageUp:
	setContentsPos( contentsX(), contentsY() - visibleHeight() );
	break;
    case Key_PageDown:
	setContentsPos( contentsX(), contentsY() + visibleHeight() );
	break;
    case Key_Home:
	setContentsPos( contentsX(), 0 );
	break;
    case Key_End:
	setContentsPos( contentsX(), contentsHeight() - visibleHeight() );
	break;
    case Key_F16: // Copy key on Sun keyboards
	copy();
	break;
#ifndef QT_NO_NETWORKPROTOCOL
    case Key_Return:
    case Key_Enter:
    case Key_Space: {
	if ( !doc->focusIndicator.href.isEmpty() ) {
	    QUrl u( doc->context(), doc->focusIndicator.href, TRUE );
	    emitLinkClicked( u.toString( FALSE, FALSE ) );
#ifndef QT_NO_CURSOR
	    viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
	}
    } break;
#endif
    default:
	if ( e->state() & ControlButton ) {
	    switch ( e->key() ) {
	    case Key_C: case Key_F16: // Copy key on Sun keyboards
		copy();
		break;
	    }
	}
	return FALSE;
    }
    return TRUE;
}

/*!  Returns the context of the edit.
    The context is a path which the text edit's QMimeSourceFactory
    uses to resolve the locations of files and images.

  \sa text
*/

QString QTextEdit::context() const
{
    return doc->context();
}

/*!
  \property QTextEdit::documentTitle
  \brief the title of the document parsed from the text.

  For \c PlainText the title will be an empty string. For \c RichText
  the title will be the text between the \c{<title>} tags, if present,
  otherwise an empty string.
*/

QString QTextEdit::documentTitle() const
{
    return doc->attributes()[ "title" ];
}

void QTextEdit::makeParagVisible( QTextParag *p )
{
    setContentsPos( contentsX(), QMIN( p->rect().y(), contentsHeight() - visibleHeight() ) );
}

/*! Scrolls the text edit to make the text at the anchor called \a name
 visible, if it can be found in the document. If the anchor isn't found
 no scrolling will occur. An anchor is defined using the HTML anchor
 tag, e.g. \c{<a name="target">}.
*/

void QTextEdit::scrollToAnchor( const QString& name )
{
    if ( name.isEmpty() )
	return;

    sync();
    QTextParag *p = doc->firstParag();

    while ( p ) {
	for ( int i = 0; i < p->length(); ++i ) {
	    if ( p->at( i )->format()->isAnchor() &&
		 p->at( i )->format()->anchorName() == name ) {
		makeParagVisible( p );
		return;
	    }
	}
	p = p->next();
    }
}

/*! If there is an anchor at position \a pos (in contents
  coordinates), its name is returned, otherwise an empty string is
  returned.
*/

QString QTextEdit::anchorAt( const QPoint& pos )
{
    QTextCursor c( doc );
    placeCursor( pos, &c );
    return c.parag()->at( c.index() )->format()->anchorHref();
}

void QTextEdit::documentWidthChanged( int w )
{
    resizeContents( w, contentsHeight() );
}

/*!
    Updates all the rendering styles used to display the text. You will
    probably want to call this function after calling setStyleSheet().
*/

void QTextEdit::updateStyles()
{
    doc->updateStyles();
    updateContents();
}

void QTextEdit::setDocument( QTextDocument *dc )
{
    if ( dc == doc )
	return;
    doc = dc;
    cursor->setDocument( doc );
    clearUndoRedo();
    lastFormatted = 0;
}

#ifndef QT_NO_CLIPBOARD

/*!
    Pastes the text with format \a subtype from the clipboard into the
    text edit at the current cursor position. The \a subtype can be
    "plain" or "html".

    If there is no text with format \a subtype in the clipboard nothing
    happens.

    \sa paste() cut() QTextEdit::copy()
*/
void QTextEdit::pasteSubType( const QCString& subtype )
{
    QCString st = subtype;
    QString t = QApplication::clipboard()->text(st);
    if ( !t.isEmpty() ) {
#if defined(Q_OS_WIN32)
	// Need to convert CRLF to NL
	int index = t.find( QString::fromLatin1("\r\n"), 0 );
	while ( index != -1 ) {
	    t.replace( index, 2, QChar('\n') );
	    index = t.find( "\r\n", index );
	}
#endif
	for ( int i=0; (uint) i<t.length(); i++ ) {
	    if ( t[ i ] < ' ' && t[ i ] != '\n' && t[ i ] != '\t' )
		t[ i ] = ' ';
	}
	if ( !t.isEmpty() )
	    insert( t, FALSE, TRUE );
    }
}

#ifndef QT_NO_MIMECLIPBOARD
/*!
  Prompts the user to choose a type from a list of text types available,
  then copies text from the clipboard (if there is any) into the text
  edit at the current text cursor position. Any selected text (in
  selection 0) is first deleted.
*/
void QTextEdit::pasteSpecial( const QPoint& pt )
{
    QCString st = pickSpecial( QApplication::clipboard()->data(), TRUE, pt );
    if ( !st.isEmpty() )
	pasteSubType( st );
}
#endif
#ifndef QT_NO_MIME
QCString QTextEdit::pickSpecial( QMimeSource* ms, bool always_ask, const QPoint& pt )
{
    if ( ms )  {
#ifndef QT_NO_POPUPMENU
	QPopupMenu popup( this, "qt_pickspecial_menu" );
	QString fmt;
	int n = 0;
	QDict<void> done;
	for (int i = 0; !( fmt = ms->format( i ) ).isNull(); i++) {
	    int semi = fmt.find( ";" );
	    if ( semi >= 0 )
		fmt = fmt.left( semi );
	    if ( fmt.left( 5 ) == "text/" ) {
		fmt = fmt.mid( 5 );
		if ( !done.find( fmt ) ) {
		    done.insert( fmt,(void*)1 );
		    popup.insertItem( fmt, i );
		    n++;
		}
	    }
	}
	if ( n ) {
	    int i = n ==1 && !always_ask ? popup.idAt( 0 ) : popup.exec( pt );
	    if ( i >= 0 )
		return popup.text(i).latin1();
	}
#else
	QString fmt;
	for (int i = 0; !( fmt = ms->format( i ) ).isNull(); i++) {
	    int semi = fmt.find( ";" );
	    if ( semi >= 0 )
		fmt = fmt.left( semi );
	    if ( fmt.left( 5 ) == "text/" ) {
		fmt = fmt.mid( 5 );
		return fmt.latin1();
	    }
	}
#endif
    }
    return QCString();
}
#endif // QT_NO_MIME
#endif // QT_NO_CLIPBOARD

/*! \enum QTextEdit::WordWrap

  This enum defines the QTextEdit's word wrap modes.  The following
  values are valid:

  \value NoWrap	 Do not wrap the text.

  \value WidgetWidth Wrap the text at the current width of the
  widget (this is the default). Wrapping is at whitespace by default;
  this can be changed with setWrapPolicy().

  \value FixedPixelWidth Wrap the text at a fixed number of pixels from
  the widget's left side. The number of pixels is set with
  wrapColumnOrWidth().

  \value FixedColumnWidth Wrap the text at a fixed number of character
  columns from the widget's left side. The number of characters is set
  with wrapColumnOrWidth().
  This is useful if you need formatted text that can also be
  displayed gracefully on devices with monospaced fonts, for example a
  standard VT100 terminal, where you might set wrapColumnOrWidth() to
  80.

 \sa setWordWrap() wordWrap()
*/

/*!
  \property QTextEdit::wordWrap
  \brief the word wrap mode

  The default mode is \c WidgetWidth which causes words to be wrapped
  at the right edge of the text edit. Wrapping occurs at whitespace,
  keeping whole words intact. If you want wrapping to occur within
  words use setWrapPolicy(). If you set a wrap mode of \c
  FixedPixelWidth or \c FixedColumnWidth you should also call
  setWrapColumnOrWidth() with the width you want.

  \sa WordWrap, wrapColumnOrWidth, wrapPolicy,
*/

void QTextEdit::setWordWrap( WordWrap mode )
{
    wrapMode = mode;
    switch ( mode ) {
    case NoWrap:
	document()->formatter()->setWrapEnabled( FALSE );
	document()->formatter()->setWrapAtColumn( -1 );
	break;
    case WidgetWidth:
	document()->formatter()->setWrapEnabled( TRUE );
	document()->formatter()->setWrapAtColumn( -1 );
	doResize();
	break;
    case FixedPixelWidth:
	document()->formatter()->setWrapEnabled( TRUE );
	document()->formatter()->setWrapAtColumn( -1 );
	setWrapColumnOrWidth( wrapWidth );
	break;
    case FixedColumnWidth:
	document()->formatter()->setWrapEnabled( TRUE );
	document()->formatter()->setWrapAtColumn( wrapWidth );
	setWrapColumnOrWidth( wrapWidth );
	break;
    }
}

QTextEdit::WordWrap QTextEdit::wordWrap() const
{
    return wrapMode;
}

/*!
  \property QTextEdit::wrapColumnOrWidth
  \brief the position (in pixels or columns depending on the wrap mode) where text will be wrapped

  If the wrap mode is \c FixedPixelWidth, the value is the number
  of pixels from the left edge of the text edit at which text should
  be wrapped. If the wrap mode is \c FixedColumnWidth, the value is
  the column number (in character columns) from the left edge of the
  text edit at which text should be wrapped.

  \sa wordWrap
 */
void QTextEdit::setWrapColumnOrWidth( int value )
{
    wrapWidth = value;
    if ( wrapMode == FixedColumnWidth ) {
	document()->formatter()->setWrapAtColumn( wrapWidth );
	doc->setWidth( visibleWidth() );
    } else {
	document()->formatter()->setWrapAtColumn( -1 );
	resizeContents( wrapWidth, contentsHeight() );
	doc->setWidth( wrapWidth );
	doc->setMinimumWidth( wrapWidth, 0 );
	doc->invalidate();
	repaintContents( FALSE );
	lastFormatted = doc->firstParag();
	interval = 0;
	formatMore();
    }
}

int QTextEdit::wrapColumnOrWidth() const
{
    return wrapWidth;
}


/*! \enum QTextEdit::WrapPolicy

  This enum defines where text can be wrapped in word wrap mode.

  The following values are valid:
  \value AtWhiteSpace  Break lines at whitespace, e.g. spaces or
  newlines.
  \value Anywhere  Break anywhere, including within words.
  \value AtWordBoundary Don't use this deprecated value (it is a
  synonym for AtWhiteSpace which you should use instead).

   \sa setWrapPolicy()
*/

/*!
  \property QTextEdit::wrapPolicy
  \brief the word wrap policy, at whitespace or anywhere

  Defines where text can be wrapped when word wrap mode is not
  \c NoWrap. The choices are \c AtWhiteSpace (the default) and \c
  Anywhere.

  \sa wordWrap
 */

void QTextEdit::setWrapPolicy( WrapPolicy policy )
{
    if ( wPolicy == policy )
	return;
    wPolicy = policy;
    QTextFormatter *formatter;
    if ( policy == AtWhiteSpace )
	formatter = new QTextFormatterBreakWords;
    else
	formatter = new QTextFormatterBreakInWords;
    formatter->setWrapAtColumn( document()->formatter()->wrapAtColumn() );
    formatter->setWrapEnabled( document()->formatter()->isWrapEnabled( 0 ) );
    document()->setFormatter( formatter );
    doc->invalidate();
    repaintContents( FALSE );
    lastFormatted = doc->firstParag();
    interval = 0;
    formatMore();
}

QTextEdit::WrapPolicy QTextEdit::wrapPolicy() const
{
    return wPolicy;
}

/*!
  Deletes all the text in the text edit.

  \sa cut() removeSelectedText() setText()

*/

void QTextEdit::clear()
{
    // make clear undoable
    doc->selectAll( QTextDocument::Temp );
    removeSelectedText( QTextDocument::Temp );

    setContentsPos( 0, 0 );
    cursor->restoreState();
    doc->clear( TRUE );
    cursor->setDocument( doc );
    cursor->setParag( doc->firstParag() );
    cursor->setIndex( 0 );
    repaintContents( FALSE );
}

int QTextEdit::undoDepth() const
{
    return document()->undoDepth();
}

/*!
  \property QTextEdit::length
  \brief the number of characters in the text

*/

int QTextEdit::length() const
{
    return document()->length();
}

/*! Returns the tab width used by the text edit.

    \sa setTabStopWidth()
 */

int QTextEdit::tabStopWidth() const
{
    return document()->tabStopWidth();
}

void QTextEdit::setUndoDepth( int d )
{
    document()->setUndoDepth( d );
}

/*! Sets the tab width used by the text edit to \a ts.

    \sa tabStopWidth()
 */

void QTextEdit::setTabStopWidth( int ts )
{
    document()->setTabStops( ts );
    doResize();
}

/*! \reimp */

QSize QTextEdit::sizeHint() const
{
    // ### calculate a reasonable one
    return QSize( 100, 100 );
}

void QTextEdit::clearUndoRedo()
{
    undoRedoInfo.clear();
    emit undoAvailable( doc->commands()->isUndoAvailable() );
    emit redoAvailable( doc->commands()->isRedoAvailable() );
}

/*!  This function gets the format of the character at position \a
  index in paragraph \a para. Sets \a font to the character's font, \a
  color to the character's color and \a verticalAlignment to the
  character's vertical alignment.

  Returns FALSE if \a para or \a index is out of range otherwise
  returns TRUE.
*/

bool QTextEdit::getFormat( int para, int index, QFont *font, QColor *color, VerticalAlignment *verticalAlignment )
{
    if ( !font || !color )
	return FALSE;
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return FALSE;
    if ( index < 0 || index >= p->length() )
	return FALSE;
    *font = p->at( index )->format()->font();
    *color = p->at( index )->format()->color();
    *verticalAlignment = (VerticalAlignment)p->at( index )->format()->vAlign();
    return TRUE;
}

/*!  This function gets the format of the paragraph \a para. Sets \a
  font to the paragraphs's font, \a color to the paragraph's color, \a
  verticalAlignment to the paragraph's vertical alignment, \a
  alignment to the paragraph's alignment, \a displayMode to the
  paragraph's display mode, \a listStyle to the paragraph's list style
  (if the display mode is QStyleSheetItem::DisplayListItem) and \a
  listDepth to the depth of the list (if the display mode is
  QStyleSheetItem::DisplayListItem).

  Returns FALSE if \a para is out of range otherwise returns TRUE.
*/

bool QTextEdit::getParagraphFormat( int para, QFont *font, QColor *color,
				    VerticalAlignment *verticalAlignment, int *alignment,
				    QStyleSheetItem::DisplayMode *displayMode,
				    QStyleSheetItem::ListStyle *listStyle,
				    int *listDepth )
{
    if ( !font || !color || !alignment || !displayMode || !listStyle )
	return FALSE;
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return FALSE;
    *font = p->paragFormat()->font();
    *color = p->paragFormat()->color();
    *verticalAlignment = (VerticalAlignment)p->paragFormat()->vAlign();
    *alignment = p->alignment();
    *displayMode = p->style() ? p->style()->displayMode() : QStyleSheetItem::DisplayBlock;
    *listStyle = p->listStyle();
    *listDepth = p->listDepth();
    return TRUE;
}



/*!

    This function is called to create a right mouse button popup menu
     at the document position \a pos.  If you want to create a custom
     popup menu, reimplement this function and return the created
     popup menu. Ownership of the popup menu is transferred to the
     caller.
*/

QPopupMenu *QTextEdit::createPopupMenu( const QPoint& pos )
{
    Q_UNUSED( pos )
#ifndef QT_NO_POPUPMENU
    QPopupMenu *popup = new QPopupMenu( this, "qt_edit_menu" );
    if ( !isReadOnly() ) {
	d->id[ IdUndo ] = popup->insertItem( tr( "&Undo" ) + ACCEL_KEY( Z ) );
	d->id[ IdRedo ] = popup->insertItem( tr( "&Redo" ) + ACCEL_KEY( Y ) );
	popup->insertSeparator();
    }
#ifndef QT_NO_CLIPBOARD
    if ( !isReadOnly() )
	d->id[ IdCut ] = popup->insertItem( tr( "Cu&t" ) + ACCEL_KEY( X ) );
    d->id[ IdCopy ] = popup->insertItem( tr( "&Copy" ) + ACCEL_KEY( C ) );
    if ( !isReadOnly() )
	d->id[ IdPaste ] = popup->insertItem( tr( "&Paste" ) + ACCEL_KEY( V ) );
#endif
    if ( !isReadOnly() ) {
	d->id[ IdClear ] = popup->insertItem( tr( "Clear" ) );
	popup->insertSeparator();
    }
#if defined(Q_WS_X11)
    d->id[ IdSelectAll ] = popup->insertItem( tr( "Select All" ) );
#else
    d->id[ IdSelectAll ] = popup->insertItem( tr( "Select All" ) + ACCEL_KEY( A ) );
#endif
    popup->setItemEnabled( d->id[ IdUndo ], !isReadOnly() && doc->commands()->isUndoAvailable() );
    popup->setItemEnabled( d->id[ IdRedo ], !isReadOnly() && doc->commands()->isRedoAvailable() );
#ifndef QT_NO_CLIPBOARD
    popup->setItemEnabled( d->id[ IdCut ], !isReadOnly() && doc->hasSelection( QTextDocument::Standard, TRUE ) );
    popup->setItemEnabled( d->id[ IdCopy ], doc->hasSelection( QTextDocument::Standard, TRUE ) );
    popup->setItemEnabled( d->id[ IdPaste ], !isReadOnly() && !QApplication::clipboard()->text().isEmpty() );
#endif
    popup->setItemEnabled( d->id[ IdClear ], !isReadOnly() && !text().isEmpty() );
    popup->setItemEnabled( d->id[ IdSelectAll ], (bool)text().length() );
    return popup;
#else
    return 0;
#endif
}

/*! \overload
    This function is called to create a right mouse button popup menu.
    If you want to create a custom popup menu, reimplement this function
    and return the created popup menu. Ownership of the popup menu is
    transferred to the caller.
*/

QPopupMenu *QTextEdit::createPopupMenu()
{
    return 0;
}

/*! \reimp */

void QTextEdit::setFont( const QFont &f )
{
    QFont old( QScrollView::font() );
    QScrollView::setFont( f );
    doc->setMinimumWidth( -1, 0 );

    // ### that is a bit hacky
    static short diff = 1;
    diff *= -1;
    doc->setWidth( visibleWidth() + diff );

    doc->updateFontSizes( f.pointSize() );
    doc->updateFontAttributes( f, old );
    lastFormatted = doc->firstParag();
    formatMore();
    repaintChanged();
}

/*! \fn QTextEdit::zoomIn()

    \overload

    Zooms in on the text by by making the base font size one
    point larger and recalculating all font sizes. This does not change
    the size of any images.

    \sa zoomOut()

*/

/*! \fn QTextEdit::zoomOut()

    \overload

    Zooms out on the text by by making the base font size one
    point smaller and recalculating all font sizes. This does not change
    the size of any images.

    \sa zoomIn()
*/


/*!
    Zooms in on the text by by making the base font size \a range
    points larger and recalculating all font sizes. This does not change
    the size of any images.

    \sa zoomOut()
*/

void QTextEdit::zoomIn( int range )
{
    QFont f( QScrollView::font() );
    f.setPointSize( f.pointSize() + range );
    setFont( f );
}

/*! Zooms out on the text by making the base font size \a range
    points smaller and recalculating all font sizes. This does not
    change the size of any images.

    \sa zoomIn()
*/

void QTextEdit::zoomOut( int range )
{
    QFont f( QScrollView::font() );
    f.setPointSize( QMAX( 1, f.pointSize() - range ) );
    setFont( f );
}

/*! Zooms the text by making the base font size \a size points and
  recalculating all font sizes. This does not change the size of any
  images.
*/

void QTextEdit::zoomTo( int size )
{
    QFont f( QScrollView::font() );
    f.setPointSize( size );
    setFont( f );
}

/*!
    \internal

   QTextEdit is optimized for large amounts text. One of its
   optimizations is to format only the visible text, formatting the rest
   on demand, e.g. as the user scrolls, so you don't usually need to
   call this function.

    In some situations you may want to force the whole text
    to be formatted. For example, if after calling setText(), you wanted
    to know the height of the document (using contentsHeight()), you
    would call this function first.
*/

void QTextEdit::sync()
{
    QTextParag *p = lastFormatted;
    if ( !p )
	p = doc->firstParag();
    while ( p ) {
	p->format();
	p = p->next();
    }
    resizeContents( contentsWidth(), doc->height() );
}

/*! \reimp */

void QTextEdit::setEnabled( bool b )
{
    QScrollView::setEnabled( b );
    if ( textFormat() == PlainText ) {
	QTextFormat *f = doc->formatCollection()->defaultFormat();
	f->setColor( colorGroup().text() );
	repaintContents();
    }
}

/*!
  Sets the background color of selection number \a selNum to \a back and
  specifies whether the text of this selection should be inverted with \a
  invertText.

  This only works for \selNum > 0. The default selection (\selNum ==
  0) gets its attributes from the colorGroup() of this widget.
*/

void QTextEdit::setSelectionAttributes( int selNum, const QColor &back, bool invertText )
{
    if ( selNum < 1 )
	return;
    if ( selNum > doc->numSelections() )
	doc->addSelection( selNum );
    doc->setSelectionColor( selNum, back );
    doc->setInvertSelectionText( selNum, invertText );
}

/*! \reimp */
void QTextEdit::windowActivationChange( bool )
{
    if ( !isVisible() )
	return;

    const QColorGroup acg = palette().active();
    const QColorGroup icg = palette().inactive();

    if ( acg != icg )
	updateContents();
}

void QTextEdit::setReadOnly( bool b )
{
    if ( readonly == b )
	return;
    readonly = b;
#ifndef QT_NO_CURSOR
    if ( readonly )
	viewport()->setCursor( arrowCursor );
    else
	viewport()->setCursor( ibeamCursor );
#endif
}

/*! Scrolls to the bottom of the document and does formatting if
  required */

void QTextEdit::scrollToBottom()
{
    sync();
    setContentsPos( contentsX(), contentsHeight() - visibleHeight() );
}

/*! Returns the rectangle of the paragraph \a para in contents
  coordinates, or an invalid rectangle if \a para is out of range.
*/

QRect QTextEdit::paragraphRect( int para ) const
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return QRect( -1, -1, -1, -1 );
    return p->rect();
}

/*! Returns the paragraph which is at position \a pos (in contents
  coordinates), or -1 if there is no paragraph at \a pos.
*/

int QTextEdit::paragraphAt( const QPoint &pos ) const
{
    QTextCursor c( doc );
    c.place( pos, doc->firstParag() );
    if ( c.parag() )
	return c.parag()->paragId();
    return -1;
}

/*! Returns the index of the character (relative to its paragraph) at
  position \a pos (in contents coordinates). If \a para is not null,
  \a para is set to this paragraph. If there is no character at \a
  pos, -1 is returned.
*/

int QTextEdit::charAt( const QPoint &pos, int *para ) const
{
    QTextCursor c( doc );
    c.place( pos, doc->firstParag() );
    if ( c.parag() ) {
	if ( para )
	    *para = c.parag()->paragId();
	return c.index();
    }
    return -1;
}

/*! Sets the background color of the paragraph \a para to \a bg */

void QTextEdit::setParagraphBackgroundColor( int para, const QColor &bg )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return;
    p->setBackgroundColor( bg );
    repaintChanged();
}

/*! Clears the background color of the paragraph \a para, so that the
  default color is used again.
*/

void QTextEdit::clearParagraphBackground( int para )
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return;
    p->clearBackgroundColor();
    repaintChanged();
}

/*! Returns the background color of the paragraph \a para or an
  invalid color if \a para is out of range or the paragraph has no
  background set
*/

QColor QTextEdit::paragraphBackgroundColor( int para ) const
{
    QTextParag *p = doc->paragAt( para );
    if ( !p )
	return QColor();
    QColor *c = p->backgroundColor();
    if ( c )
	return *c;
    return QColor();
}

/*! \property QTextEdit::undoRedoEnabled
  \brief whether undo/redo is enabled
*/

void QTextEdit::setUndoRedoEnabled( bool b )
{
    undoEnabled = b;
}

bool QTextEdit::isUndoRedoEnabled() const
{
    return undoEnabled;
}

/*! Returns whether undo is available */

bool QTextEdit::isUndoAvailable() const
{
    return doc->commands()->isUndoAvailable() || undoRedoInfo.valid();
}

/*! Returns whether redo is available */

bool QTextEdit::isRedoAvailable() const
{
    return doc->commands()->isRedoAvailable();
}

#endif //QT_NO_TEXTEDIT
