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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the Qt3Support module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "q3textedit.h"
+
+#ifndef QT_NO_TEXTEDIT
+
+#include <private/q3richtext_p.h>
+#include "qpainter.h"
+#include "qpen.h"
+#include "qbrush.h"
+#include "qpixmap.h"
+#include "qfont.h"
+#include "qcolor.h"
+#include "qstyle.h"
+#include "qsize.h"
+#include "qevent.h"
+#include "qtimer.h"
+#include "qapplication.h"
+#include "q3listbox.h"
+#include "qclipboard.h"
+#include "qcolordialog.h"
+#include "q3stylesheet.h"
+#include "q3dragobject.h"
+#include "qurl.h"
+#include "qcursor.h"
+#include "qregexp.h"
+#include "q3popupmenu.h"
+#include "qstack.h"
+#include "qmetaobject.h"
+#include "q3textbrowser.h"
+#include "private/q3syntaxhighlighter_p.h"
+#include "qtextformat.h"
+#ifndef QT_NO_IM
+#include <qinputcontext.h>
+#endif
+
+#ifndef QT_NO_ACCEL
+#include <qkeysequence.h>
+#define ACCEL_KEY(k) QLatin1Char('\t') + QString(QKeySequence(Qt::CTRL | Qt::Key_ ## k))
+#else
+#define ACCEL_KEY(k) QLatin1Char('\t' )+ QString(QLatin1String("Ctrl+" #k))
+#endif
+
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+#define LOGOFFSET(i) d->logOffset + i
+#endif
+
+QT_BEGIN_NAMESPACE
+
+struct QUndoRedoInfoPrivate
+{
+    Q3TextString text;
+};
+
+class Q3TextEditPrivate
+{
+public:
+    Q3TextEditPrivate()
+        :preeditStart(-1),preeditLength(-1),numPreeditSelections(0),ensureCursorVisibleInShowEvent(false),
+         tabChangesFocus(false),
+#ifndef QT_NO_CLIPBOARD
+         clipboard_mode(QClipboard::Clipboard),
+#endif
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+         od(0), optimMode(false),
+         maxLogLines(-1),
+         logOffset(0),
+#endif
+         autoFormatting((uint)Q3TextEdit::AutoAll),
+         cursorRepaintMode(false),
+         cursorBlinkActive(false)
+
+    {
+        for (int i=0; i<7; i++)
+            id[i] = 0;
+    }
+    int id[7];
+    int preeditStart;
+    int preeditLength;
+    int numPreeditSelections;
+    uint ensureCursorVisibleInShowEvent : 1;
+    uint tabChangesFocus : 1;
+    QString scrollToAnchor; // used to deferr scrollToAnchor() until the show event when we are resized
+    QString pressedName;
+    QString onName;
+#ifndef QT_NO_CLIPBOARD
+    QClipboard::Mode clipboard_mode;
+#endif
+    QTimer *trippleClickTimer;
+    QPoint trippleClickPoint;
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    Q3TextEditOptimPrivate * od;
+    bool optimMode : 1;
+    int maxLogLines;
+    int logOffset;
+#endif
+    Q3TextEdit::AutoFormatting autoFormatting;
+    uint cursorRepaintMode : 1;
+    uint cursorBlinkActive : 1;
+};
+
+#ifndef QT_NO_MIME
+class Q3RichTextDrag : public Q3TextDrag
+{
+public:
+    Q3RichTextDrag(QWidget *dragSource = 0, const char *name = 0);
+
+    void setPlainText(const QString &txt) { setText(txt); }
+    void setRichText(const QString &txt) { richTxt = txt; }
+
+    virtual QByteArray encodedData(const char *mime) const;
+    virtual const char* format(int i) const;
+
+    static bool decode(QMimeSource *e, QString &str, const QString &mimetype,
+                        const QString &subtype);
+    static bool canDecode(QMimeSource* e);
+
+private:
+    QString richTxt;
+
+};
+
+Q3RichTextDrag::Q3RichTextDrag(QWidget *dragSource, const char *name)
+    : Q3TextDrag(dragSource, name)
+{
+}
+
+QByteArray Q3RichTextDrag::encodedData(const char *mime) const
+{
+    if (qstrcmp("application/x-qrichtext", mime) == 0) {
+        return richTxt.toUtf8(); // #### perhaps we should use USC2 instead?
+    } else
+        return Q3TextDrag::encodedData(mime);
+}
+
+bool Q3RichTextDrag::decode(QMimeSource *e, QString &str, const QString &mimetype,
+                            const QString &subtype)
+{
+    if (mimetype == QLatin1String("application/x-qrichtext")) {
+        // do richtext decode
+        const char *mime;
+        int i;
+        for (i = 0; (mime = e->format(i)); ++i) {
+            if (qstrcmp("application/x-qrichtext", mime) != 0)
+                continue;
+            str = QString::fromUtf8(e->encodedData(mime));
+            return true;
+        }
+        return false;
+    }
+
+    // do a regular text decode
+    QString st = subtype;
+    return Q3TextDrag::decode(e, str, st);
+}
+
+bool Q3RichTextDrag::canDecode(QMimeSource* e)
+{
+    if (e->provides("application/x-qrichtext"))
+        return true;
+    return Q3TextDrag::canDecode(e);
+}
+
+const char* Q3RichTextDrag::format(int i) const
+{
+    if (Q3TextDrag::format(i))
+        return Q3TextDrag::format(i);
+    if (Q3TextDrag::format(i-1))
+        return "application/x-qrichtext";
+    return 0;
+}
+
+#endif
+
+static bool block_set_alignment = false;
+
+/*!
+    \class Q3TextEdit
+    \brief The Q3TextEdit widget provides a powerful single-page rich text editor.
+
+    \compat
+
+    \tableofcontents
+
+    \section1 Introduction and Concepts
+
+    Q3TextEdit is an advanced WYSIWYG viewer/editor supporting rich
+    text formatting using HTML-style tags. It is optimized to handle
+    large documents and to respond quickly to user input.
+
+    Q3TextEdit has four modes of operation:
+    \table
+    \header \i Mode \i Command \i Notes
+    \row \i Plain Text Editor \i setTextFormat(Qt::PlainText)
+         \i Set text with setText(); text() returns plain text. Text
+         attributes (e.g. colors) can be set, but plain text is always
+         returned.
+    \row \i Rich Text Editor \i setTextFormat(Qt::RichText)
+         \i Set text with setText(); text() returns rich text. Rich
+         text editing is fairly limited. You can't set margins or
+         insert images for example (although you can read and
+         correctly display files that have margins set and that
+         include images). This mode is mostly useful for editing small
+         amounts of rich text.
+    \row \i Text Viewer \i setReadOnly(true)
+         \i Set text with setText() or append() (which has no undo
+         history so is faster and uses less memory); text() returns
+         plain or rich text depending on the textFormat(). This mode
+         can correctly display a large subset of HTML tags.
+    \row \i Log Viewer \i setTextFormat(Qt::LogText)
+         \i Append text using append(). The widget is set to be read
+         only and rich text support is disabled although a few HTML
+         tags (for color, bold, italic and underline) may be used.
+         (See \link #logtextmode Qt::LogText mode\endlink for details.)
+    \endtable
+
+    Q3TextEdit can be used as a syntax highlighting editor when used in
+    conjunction with QSyntaxHighlighter.
+
+    We recommend that you always call setTextFormat() to set the mode
+    you want to use. If you use Qt::AutoText then setText() and
+    append() will try to determine whether the text they are given is
+    plain text or rich text. If you use Qt::RichText then setText() and
+    append() will assume that the text they are given is rich text.
+    insert() simply inserts the text it is given.
+
+    Q3TextEdit works on paragraphs and characters. A paragraph is a
+    formatted string which is word-wrapped to fit into the width of
+    the widget. By default when reading plain text, one newline
+    signify a paragraph. A document consists of zero or more
+    paragraphs, indexed from 0. Characters are indexed on a
+    per-paragraph basis, also indexed from 0. 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.
+
+    The text edit documentation uses the following concepts:
+    \list
+    \i \e{current format} --
+    this is the format at the current cursor position, \e and it
+    is the format of the selected text if any.
+    \i \e{current paragraph} -- the paragraph which contains the
+    cursor.
+    \endlist
+
+    Q3TextEdit can display images (using Q3MimeSourceFactory), lists and
+    tables. If the text is too large to view within the text edit's
+    viewport, scroll bars 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(). Custom tags can be created and placed in a custom
+    style sheet. Change the style sheet with \l{setStyleSheet()}; see
+    Q3StyleSheet for details. The images identified by image tags are
+    displayed if they can be interpreted using the text edit's
+    \l{Q3MimeSourceFactory}; 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 Q3TextEdit, 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 Q3StyleSheet 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. This means that if the text looks
+    like HTML or XML it will probably be interpreted as rich text, so
+    you should call setTextFormat(Qt::PlainText) to preserve such
+    text.
+
+    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.
+
+    \section1 Using Q3TextEdit as a Display Widget
+
+    Q3TextEdit can display a large HTML subset, including tables and
+    images.
+
+    The text is set or replaced using setText() which deletes any
+    existing text and replaces it with the text passed in the
+    setText() call. If you call setText() with legacy HTML (with
+    setTextFormat(Qt::RichText) in force), and then call text(), the text
+    that is returned may have different markup, but will render the
+    same. Text can be inserted with insert(), paste(), pasteSubType()
+    and append(). Text that is appended does not go into the undo
+    history; this makes append() faster and consumes less memory. 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).
+
+    Loading and saving text is achieved using setText() and text(),
+    for example:
+    \snippet doc/src/snippets/code/src_qt3support_text_q3textedit.cpp 0
+
+    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.
+
+    A read-only Q3TextEdit provides the same functionality as the
+    (obsolete) QTextView. (QTextView is still supplied for
+    compatibility with old code.)
+
+    \section2 Read-only key bindings
+
+    When Q3TextEdit is used read-only the key-bindings are limited to
+    navigation, and text may only be selected with the mouse:
+    \table
+    \header \i Keypresses \i Action
+    \row \i Up        \i Move one line up
+    \row \i Down        \i Move one line down
+    \row \i Left        \i Move one character left
+    \row \i Right        \i Move one character right
+    \row \i PageUp        \i Move one (viewport) page up
+    \row \i PageDown        \i Move one (viewport) page down
+    \row \i Home        \i Move to the beginning of the text
+    \row \i End                \i Move to the end of the text
+    \row \i Shift+Wheel
+         \i Scroll the page horizontally (the Wheel is the mouse wheel)
+    \row \i Ctrl+Wheel        \i Zoom the text
+    \endtable
+
+    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 Q3MimeSourceFactory uses to resolve
+    the locations of files and images. It is passed to the
+    mimeSourceFactory() when quering data. (See Q3TextEdit() and
+    \l{context()}.)
+
+    \target logtextmode
+    \section2 Using Q3TextEdit in Qt::LogText Mode
+
+    Setting the text format to Qt::LogText puts the widget in a special
+    mode which is optimized for very large texts. In this mode editing
+    and rich text support are disabled (the widget is explicitly set
+    to read-only mode). This allows the text to be stored in a
+    different, more memory efficient manner. However, a certain degree
+    of text formatting is supported through the use of formatting
+    tags. A tag is delimited by \c < and \c {>}. The characters \c
+    {<}, \c > and \c & are escaped by using \c {&lt;}, \c {&gt;} and
+    \c {&amp;}. A tag pair consists of a left and a right tag (or
+    open/close tags). Left-tags mark the starting point for
+    formatting, while right-tags mark the ending point. A right-tag
+    always start with a \c / before the tag keyword. For example \c
+    <b> and \c </b> are a tag pair. Tags can be nested, but they
+    have to be closed in the same order as they are opened. For
+    example, \c <b><u></u></b> is valid, while \c
+    <b><u></b></u> will output an error message.
+
+    By using tags it is possible to change the color, bold, italic and
+    underline settings for a piece of text. A color can be specified
+    by using the HTML font tag \c {<font color=colorname>}. The color
+    name can be one of the color names from the X11 color database, or
+    a RGB hex value (e.g \c {#00ff00}). Example of valid color tags:
+    \c {<font color=red>}, \c{<font color="light blue">},\c {<font
+    color="#223344">}. Bold, italic and underline settings can be
+    specified by the tags \c {<b>}, \c <i> and \c {<u>}. Note that a
+    tag does not necessarily have to be closed. A valid example:
+    \snippet doc/src/snippets/code/src_qt3support_text_q3textedit.cpp 1
+
+    Stylesheets can also be used in Qt::LogText mode. To create and use a
+    custom tag, you could do the following:
+    \snippet doc/src/snippets/code/src_qt3support_text_q3textedit.cpp 2
+    Note that only the color, bold, underline and italic attributes of
+    a Q3StyleSheetItem is used in Qt::LogText mode.
+
+    Note that you can use setMaxLogLines() to limit the number of
+    lines the widget can hold in Qt::LogText mode.
+
+    There are a few things that you need to be aware of when the
+    widget is in this mode:
+    \list
+    \i Functions that deal with rich text formatting and cursor
+    movement will not work or return anything valid.
+    \i Lines are equivalent to paragraphs.
+    \endlist
+
+    \section1 Using Q3TextEdit as an Editor
+
+    All the information about using Q3TextEdit as a display widget also
+    applies here.
+
+    The current format's attributes are set with setItalic(),
+    setBold(), setUnderline(), setFamily() (font family),
+    setPointSize(), setColor() and setCurrentFont(). The current
+    paragraph's 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(). Q3TextEdit supports multiple
+    selections. Most of the selection functions operate on the default
+    selection, selection 0. If the user presses a non-selecting key,
+    e.g. a cursor key without also holding down Shift, all selections
+    are cleared.
+
+    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.
+
+    Q3TextEdit 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.
+
+    \section2 Editing key bindings
+
+    The list of key-bindings which are implemented for editing:
+    \table
+    \header \i Keypresses \i Action
+    \row \i Backspace \i Delete the character to the left of the cursor
+    \row \i Delete \i Delete the character to the right of the cursor
+    \row \i Ctrl+A \i Move the cursor to the beginning of the line
+    \row \i Ctrl+B \i Move the cursor one character left
+    \row \i Ctrl+C \i Copy the marked text to the clipboard (also
+                      Ctrl+Insert under Windows)
+    \row \i Ctrl+D \i Delete the character to the right of the cursor
+    \row \i Ctrl+E \i Move the cursor to the end of the line
+    \row \i Ctrl+F \i Move the cursor one character right
+    \row \i Ctrl+H \i Delete the character to the left of the cursor
+    \row \i Ctrl+K \i Delete to end of line
+    \row \i Ctrl+N \i Move the cursor one line down
+    \row \i Ctrl+P \i Move the cursor one line up
+    \row \i Ctrl+V \i Paste the clipboard text into line edit
+                      (also Shift+Insert under Windows)
+    \row \i Ctrl+X \i Cut the marked text, copy to clipboard
+                      (also Shift+Delete under Windows)
+    \row \i Ctrl+Z \i Undo the last operation
+    \row \i Ctrl+Y \i Redo the last operation
+    \row \i Left            \i Move the cursor one character left
+    \row \i Ctrl+Left  \i Move the cursor one word left
+    \row \i Right            \i Move the cursor one character right
+    \row \i Ctrl+Right \i Move the cursor one word right
+    \row \i Up            \i Move the cursor one line up
+    \row \i Ctrl+Qt::Up    \i Move the cursor one word up
+    \row \i DownArrow            \i Move the cursor one line down
+    \row \i Ctrl+Down \i Move the cursor one word down
+    \row \i PageUp            \i Move the cursor one page up
+    \row \i PageDown            \i Move the cursor one page down
+    \row \i Home            \i Move the cursor to the beginning of the line
+    \row \i Ctrl+Home            \i Move the cursor to the beginning of the text
+    \row \i End                    \i Move the cursor to the end of the line
+    \row \i Ctrl+End            \i Move the cursor to the end of the text
+    \row \i Shift+Wheel            \i Scroll the page horizontally
+                            (the Wheel is the mouse wheel)
+    \row \i Ctrl+Wheel            \i Zoom the text
+    \endtable
+
+    To select (mark) text hold down the Shift key whilst pressing one
+    of the movement keystrokes, for example, \e{Shift+Right}
+    will select the character to the right, and \e{Shift+Ctrl+Right} 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().
+*/
+
+/*!
+    \enum Q3TextEdit::AutoFormattingFlag
+
+    \value AutoNone Do not perform any automatic formatting
+    \value AutoBulletList Only automatically format bulletted lists
+    \value AutoAll Apply all available autoformatting
+*/
+
+
+/*!
+    \enum Q3TextEdit::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.
+
+    \value ActionWordBackspace Delete the word to the left of the
+    cursor position.
+
+    \value ActionWordDelete Delete the word to the right of the
+    cursor position
+
+*/
+
+/*!
+    \enum Q3TextEdit::VerticalAlignment
+
+    This enum is used to set the vertical alignment of the text.
+
+    \value AlignNormal Normal alignment
+    \value AlignSuperScript Superscript
+    \value AlignSubScript Subscript
+*/
+
+/*!
+    \enum Q3TextEdit::TextInsertionFlags
+
+    \internal
+
+    \value RedoIndentation
+    \value CheckNewLines
+    \value RemoveSelected
+*/
+
+
+/*!
+    \fn void Q3TextEdit::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 Q3TextEdit::textChanged()
+
+    This signal is emitted whenever the text in the text edit changes.
+
+    \sa setText() append()
+*/
+
+/*!
+    \fn void Q3TextEdit::selectionChanged()
+
+    This signal is emitted whenever the selection changes.
+
+    \sa setSelection() copyAvailable()
+*/
+
+/*!  \fn Q3TextDocument *Q3TextEdit::document() const
+
+    \internal
+
+  This function returns the Q3TextDocument which is used by the text
+  edit.
+*/
+
+/*!  \fn void Q3TextEdit::setDocument(Q3TextDocument *doc)
+
+    \internal
+
+  This function sets the Q3TextDocument 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
+  Q3TextDocument 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 Q3TextEdit::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 viewport page up
+
+    \value MovePgDown  Moves the cursor one viewport page down
+*/
+
+/*!
+    \property Q3TextEdit::overwriteMode
+    \brief the text edit's overwrite mode
+
+    If false (the default) 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 Q3TextEdit::setCurrentFont(const QFont &f)
+
+    Sets the font of the current format to \a f.
+
+    If the widget is in Qt::LogText mode this function will do
+    nothing. Use setFont() instead.
+
+    \sa currentFont() setPointSize() setFamily()
+*/
+
+/*!
+    \property Q3TextEdit::undoDepth
+    \brief the depth of the undo history
+
+    The maximum number of steps in the undo/redo history. The default
+    is 100.
+
+    \sa undo() redo()
+*/
+
+/*!
+    \fn void Q3TextEdit::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 Q3TextEdit::modificationChanged(bool m)
+
+    This signal is emitted when the modification status of the
+    document has changed. If \a m is true, the document was modified,
+    otherwise the modification state has been reset to unmodified.
+
+    \sa modified
+*/
+
+/*!
+    \fn void Q3TextEdit::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 Q3TextEdit::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 Q3TextEdit::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 Q3TextEdit::currentVerticalAlignmentChanged(Q3TextEdit::VerticalAlignment a)
+
+    This signal is emitted if the vertical alignment of the current
+    format has changed.
+
+    The new vertical alignment is \a a.
+*/
+
+/*!
+    \fn void Q3TextEdit::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 Q3TextEdit::cursorPositionChanged(Q3TextCursor *c)
+
+    \internal
+*/
+
+/*!
+    \fn void Q3TextEdit::cursorPositionChanged(int para, int pos)
+
+    \overload
+
+    This signal is emitted if the position of the cursor has changed.
+    \a para contains the paragraph index and \a pos contains the
+    character position within the paragraph.
+
+    \sa setCursorPosition()
+*/
+
+/*!
+    \fn void Q3TextEdit::clicked(int para, int pos)
+
+    This signal is emitted when the mouse is clicked on the paragraph
+    \a para at character position \a pos.
+
+    \sa doubleClicked()
+*/
+
+/*! \fn void Q3TextEdit::doubleClicked(int para, int pos)
+
+  This signal is emitted when the mouse is double-clicked on the
+  paragraph \a para at character position \a pos.
+
+  \sa clicked()
+*/
+
+
+/*!
+    \fn void Q3TextEdit::returnPressed()
+
+    This signal is emitted if the user pressed the Return or the Enter
+    key.
+*/
+
+/*!
+    \fn Q3TextCursor *Q3TextEdit::textCursor() const
+
+    Returns the text edit's text cursor.
+
+    \warning Q3TextCursor is not in the public API, but in special
+    circumstances you might wish to use it.
+*/
+
+/*!
+    Constructs an empty Q3TextEdit called \a name, with parent \a
+    parent.
+*/
+
+Q3TextEdit::Q3TextEdit(QWidget *parent, const char *name)
+    : Q3ScrollView(parent, name, Qt::WStaticContents | Qt::WNoAutoErase),
+      doc(new Q3TextDocument(0)), undoRedoInfo(doc)
+{
+    init();
+}
+
+/*!
+    Constructs a Q3TextEdit called \a name, with parent \a parent. The
+    text edit will display the text \a text using context \a context.
+
+    The \a context is a path which the text edit's Q3MimeSourceFactory
+    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
+    Q3MimeSourceFactory 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
+    Q3MimeSourceFactory 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".
+*/
+
+Q3TextEdit::Q3TextEdit(const QString& text, const QString& context,
+                      QWidget *parent, const char *name)
+    : Q3ScrollView(parent, name, Qt::WStaticContents | Qt::WNoAutoErase),
+      doc(new Q3TextDocument(0)), undoRedoInfo(doc)
+{
+    init();
+    setText(text, context);
+}
+
+/*!
+    Destructor.
+*/
+
+Q3TextEdit::~Q3TextEdit()
+{
+    delete undoRedoInfo.d;
+    undoRedoInfo.d = 0;
+    delete cursor;
+    delete doc;
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    delete d->od;
+#endif
+    delete d;
+}
+
+void Q3TextEdit::init()
+{
+    d = new Q3TextEditPrivate;
+    doc->formatCollection()->setPaintDevice(this);
+    undoEnabled = true;
+    readonly = true;
+    setReadOnly(false);
+    setFrameStyle(LineEditPanel | Sunken);
+    connect(doc, SIGNAL(minimumWidthChanged(int)),
+             this, SLOT(documentWidthChanged(int)));
+
+    mousePressed = false;
+    inDoubleClick = false;
+    modified = false;
+    mightStartDrag = false;
+    onLink.clear();
+    d->onName.clear();
+    overWrite = false;
+    wrapMode = WidgetWidth;
+    wrapWidth = -1;
+    wPolicy = AtWhiteSpace;
+    inDnD = false;
+    doc->setFormatter(new Q3TextFormatterBreakWords);
+    QFont f = Q3ScrollView::font();
+    if (f.kerning())
+        f.setKerning(false);
+    doc->formatCollection()->defaultFormat()->setFont(f);
+    doc->formatCollection()->defaultFormat()->setColor(palette().color(QPalette::Text));
+    currentFormat = doc->formatCollection()->defaultFormat();
+    currentAlignment = Qt::AlignAuto;
+
+    setBackgroundRole(QPalette::Base);
+    viewport()->setBackgroundRole(QPalette::Base);
+
+    viewport()->setAcceptDrops(true);
+    resizeContents(0, doc->lastParagraph() ?
+                    (doc->lastParagraph()->paragId() + 1) * doc->formatCollection()->defaultFormat()->height() : 0);
+
+    setAttribute(Qt::WA_KeyCompression, true);
+    viewport()->setMouseTracking(true);
+#ifndef QT_NO_CURSOR
+    viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+    cursor = new Q3TextCursor(doc);
+
+    formatTimer = new QTimer(this);
+    connect(formatTimer, SIGNAL(timeout()),
+             this, SLOT(formatMore()));
+    lastFormatted = doc->firstParagraph();
+
+    scrollTimer = new QTimer(this);
+    connect(scrollTimer, SIGNAL(timeout()),
+             this, SLOT(autoScrollTimerDone()));
+
+    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
+
+    d->trippleClickTimer = new QTimer(this);
+
+    formatMore();
+
+    blinkCursorVisible = false;
+
+    viewport()->setFocusProxy(this);
+    viewport()->setFocusPolicy(Qt::WheelFocus);
+    setFocusPolicy(Qt::WheelFocus);
+    setInputMethodEnabled(true);
+    viewport()->installEventFilter(this);
+    connect(this, SIGNAL(horizontalSliderReleased()), this, SLOT(sliderReleased()));
+    connect(this, SIGNAL(verticalSliderReleased()), this, SLOT(sliderReleased()));
+    installEventFilter(this);
+}
+
+void Q3TextEdit::paintDocument(bool drawAll, QPainter *p, int cx, int cy, int cw, int ch)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    Q_ASSERT(!d->optimMode);
+    if (d->optimMode)
+        return;
+#endif
+
+    bool drawCur = blinkCursorVisible && (hasFocus() || viewport()->hasFocus());
+    if ((hasSelectedText() && !style()->styleHint(QStyle::SH_BlinkCursorWhenTextSelected, 0, this)) ||
+        isReadOnly() || !cursorVisible)
+        drawCur = false;
+    QPalette pal = palette();
+    if (doc->paper())
+        pal.setBrush(QPalette::Base, *doc->paper());
+
+    if (contentsY() < doc->y()) {
+        p->fillRect(contentsX(), contentsY(), visibleWidth(), doc->y(),
+                     pal.base());
+    }
+    if (drawAll && doc->width() - contentsX() < cx + cw) {
+        p->fillRect(doc->width() - contentsX(), cy, cx + cw - doc->width() + contentsX(), ch,
+                     pal.base());
+    }
+
+    p->setBrushOrigin(-contentsX(), -contentsY());
+
+    lastFormatted = doc->draw(p, cx, cy, cw, ch, pal, !drawAll, drawCur, cursor);
+
+    if (lastFormatted == doc->lastParagraph())
+        resizeContents(contentsWidth(), doc->height());
+
+    if (contentsHeight() < visibleHeight() && (!doc->lastParagraph() || doc->lastParagraph()->isValid()) && drawAll)
+        p->fillRect(0, contentsHeight(), visibleWidth(),
+                     visibleHeight() - contentsHeight(), pal.base());
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::drawContents(QPainter *p, int cx, int cy, int cw, int ch)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimDrawContents(p, cx, cy, cw, ch);
+        return;
+    }
+#endif
+    paintDocument(true, p, cx, cy, cw, ch);
+    int v;
+    p->setPen(palette().color(foregroundRole()));
+    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;
+        }
+    }
+}
+
+/*!
+    \internal
+*/
+
+void Q3TextEdit::drawContents(QPainter *p)
+{
+    if (horizontalScrollBar()->isVisible() &&
+         verticalScrollBar()->isVisible()) {
+        const QRect verticalRect = verticalScrollBar()->geometry();
+        const QRect horizontalRect = horizontalScrollBar()->geometry();
+
+        QRect cornerRect;
+        cornerRect.setTop(verticalRect.bottom());
+        cornerRect.setBottom(horizontalRect.bottom());
+        cornerRect.setLeft(verticalRect.left());
+        cornerRect.setRight(verticalRect.right());
+
+        p->fillRect(cornerRect, palette().background());
+    }
+}
+
+/*!
+    \reimp
+*/
+
+bool Q3TextEdit::event(QEvent *e)
+{
+    if (e->type() == QEvent::AccelOverride && !isReadOnly()) {
+        QKeyEvent* ke = (QKeyEvent*) e;
+        switch(ke->state()) {
+        case Qt::NoButton:
+        case Qt::Keypad:
+        case Qt::ShiftButton:
+            if (ke->key() < Qt::Key_Escape) {
+                ke->accept();
+            } else {
+                switch (ke->key()) {
+                case Qt::Key_Return:
+                case Qt::Key_Enter:
+                case Qt::Key_Delete:
+                case Qt::Key_Home:
+                case Qt::Key_End:
+                case Qt::Key_Backspace:
+                case Qt::Key_Left:
+                case Qt::Key_Right:
+                    ke->accept();
+                default:
+                    break;
+                }
+            }
+            break;
+
+        case Qt::ControlButton:
+        case Qt::ControlButton|Qt::ShiftButton:
+        case Qt::ControlButton|Qt::Keypad:
+        case Qt::ControlButton|Qt::ShiftButton|Qt::Keypad:
+            switch (ke->key()) {
+            case Qt::Key_Tab:
+            case Qt::Key_Backtab:
+                ke->ignore();
+                break;
+// Those are too frequently used for application functionality
+/*            case Qt::Key_A:
+            case Qt::Key_B:
+            case Qt::Key_D:
+            case Qt::Key_E:
+            case Qt::Key_F:
+            case Qt::Key_H:
+            case Qt::Key_I:
+            case Qt::Key_K:
+            case Qt::Key_N:
+            case Qt::Key_P:
+            case Qt::Key_T:
+*/
+            case Qt::Key_C:
+            case Qt::Key_V:
+            case Qt::Key_X:
+            case Qt::Key_Y:
+            case Qt::Key_Z:
+            case Qt::Key_Left:
+            case Qt::Key_Right:
+            case Qt::Key_Up:
+            case Qt::Key_Down:
+            case Qt::Key_Home:
+            case Qt::Key_End:
+#if defined (Q_WS_WIN)
+            case Qt::Key_Insert:
+            case Qt::Key_Delete:
+#endif
+                ke->accept();
+            default:
+                break;
+            }
+            break;
+
+        default:
+            switch (ke->key()) {
+#if defined (Q_WS_WIN)
+            case Qt::Key_Insert:
+                ke->accept();
+#endif
+            default:
+                break;
+            }
+            break;
+        }
+    }
+
+    if (e->type() == QEvent::Show) {
+        if (
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+             !d->optimMode &&
+#endif
+             d->ensureCursorVisibleInShowEvent ) {
+            ensureCursorVisible();
+            d->ensureCursorVisibleInShowEvent = false;
+        }
+        if (!d->scrollToAnchor.isEmpty()) {
+            scrollToAnchor(d->scrollToAnchor);
+            d->scrollToAnchor.clear();
+        }
+    }
+    return QWidget::event(e);
+}
+
+/*!
+    Processes the key event, \a e. By default key events are used to
+    provide keyboard navigation and text editing.
+*/
+
+void Q3TextEdit::keyPressEvent(QKeyEvent *e)
+{
+    changeIntervalTimer->stop();
+    interval = 10;
+    bool unknownKey = false;
+    if (isReadOnly()) {
+        if (!handleReadOnlyKeyEvent(e))
+            Q3ScrollView::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->paragraph()->document()->nextDoubleBuffered = true;
+        repaintChanged();
+    }
+
+    bool clearUndoRedoInfo = true;
+
+
+    switch (e->key()) {
+    case Qt::Key_Left:
+    case Qt::Key_Right: {
+        // a bit hacky, but can't change this without introducing new enum values for move and keeping the
+        // correct semantics and movement for BiDi and non BiDi text.
+        CursorAction a;
+        if (cursor->paragraph()->string()->isRightToLeft() == (e->key() == Qt::Key_Right))
+            a = e->state() & Qt::ControlButton ? MoveWordBackward : MoveBackward;
+        else
+            a = e->state() & Qt::ControlButton ? MoveWordForward : MoveForward;
+        moveCursor(a, e->state() & Qt::ShiftButton);
+        break;
+    }
+    case Qt::Key_Up:
+        moveCursor(e->state() & Qt::ControlButton ? MovePgUp : MoveUp, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_Down:
+        moveCursor(e->state() & Qt::ControlButton ? MovePgDown : MoveDown, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_Home:
+        moveCursor(e->state() & Qt::ControlButton ? MoveHome : MoveLineStart, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_End:
+        moveCursor(e->state() & Qt::ControlButton ? MoveEnd : MoveLineEnd, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_Prior:
+        moveCursor(MovePgUp, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_Next:
+        moveCursor(MovePgDown, e->state() & Qt::ShiftButton);
+        break;
+    case Qt::Key_Return: case Qt::Key_Enter:
+        if (doc->hasSelection(Q3TextDocument::Standard, false))
+            removeSelectedText();
+        if (textFormat() == Qt::RichText && (e->state() & Qt::ControlButton)) {
+            // Ctrl-Enter inserts a line break in rich text mode
+            insert(QString(QChar(QChar::LineSeparator)), true, false);
+        } else {
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+            clearUndoRedoInfo = false;
+            doKeyboardAction(ActionReturn);
+            emit returnPressed();
+        }
+        break;
+    case Qt::Key_Delete:
+#if defined (Q_WS_WIN)
+        if (e->state() & Qt::ShiftButton) {
+            cut();
+            break;
+        } else
+#endif
+        if (doc->hasSelection(Q3TextDocument::Standard, true)) {
+            removeSelectedText();
+            break;
+        }
+        doKeyboardAction(e->state() & Qt::ControlButton ? ActionWordDelete
+                          : ActionDelete);
+        clearUndoRedoInfo = false;
+
+        break;
+    case Qt::Key_Insert:
+        if (e->state() & Qt::ShiftButton)
+            paste();
+#if defined (Q_WS_WIN)
+        else if (e->state() & Qt::ControlButton)
+            copy();
+#endif
+        else
+            setOverwriteMode(!isOverwriteMode());
+        break;
+    case Qt::Key_Backspace:
+#if defined (Q_WS_WIN)
+        if (e->state() & Qt::AltButton) {
+            if (e->state() & Qt::ControlButton) {
+                break;
+            } else if (e->state() & Qt::ShiftButton) {
+                redo();
+                break;
+            } else {
+                undo();
+                break;
+            }
+        } else
+#endif
+        if (doc->hasSelection(Q3TextDocument::Standard, true)) {
+            removeSelectedText();
+            break;
+        }
+
+        doKeyboardAction(e->state() & Qt::ControlButton ? ActionWordBackspace
+                          : ActionBackspace);
+        clearUndoRedoInfo = false;
+        break;
+    case Qt::Key_F16: // Copy key on Sun keyboards
+        copy();
+        break;
+    case Qt::Key_F18:  // Paste key on Sun keyboards
+        paste();
+        break;
+    case Qt::Key_F20:  // Cut key on Sun keyboards
+        cut();
+        break;
+    case Qt::Key_Direction_L:
+        if (doc->textFormat() == Qt::PlainText) {
+            // change the whole doc
+            Q3TextParagraph *p = doc->firstParagraph();
+            while (p) {
+                p->setDirection(QChar::DirL);
+                p->setAlignment(Qt::AlignLeft);
+                p->invalidate(0);
+                p = p->next();
+            }
+        } else {
+            if (!cursor->paragraph() || cursor->paragraph()->direction() == QChar::DirL)
+                return;
+            cursor->paragraph()->setDirection(QChar::DirL);
+            if (cursor->paragraph()->length() <= 1&&
+                 ((cursor->paragraph()->alignment() & (Qt::AlignLeft | Qt::AlignRight)) != 0))
+                setAlignment(Qt::AlignLeft);
+        }
+        repaintChanged();
+        break;
+    case Qt::Key_Direction_R:
+        if (doc->textFormat() == Qt::PlainText) {
+            // change the whole doc
+            Q3TextParagraph *p = doc->firstParagraph();
+            while (p) {
+                p->setDirection(QChar::DirR);
+                p->setAlignment(Qt::AlignRight);
+                p->invalidate(0);
+                p = p->next();
+            }
+        } else {
+            if (!cursor->paragraph() || cursor->paragraph()->direction() == QChar::DirR)
+                return;
+            cursor->paragraph()->setDirection(QChar::DirR);
+            if (cursor->paragraph()->length() <= 1&&
+                 ((cursor->paragraph()->alignment() & (Qt::AlignLeft | Qt::AlignRight)) != 0))
+                setAlignment(Qt::AlignRight);
+        }
+        repaintChanged();
+        break;
+    default: {
+            unsigned char ascii = e->text().length() ? e->text().unicode()->latin1() : 0;
+            if (e->text().length() &&
+                ((!(e->state() & Qt::ControlButton) &&
+#ifndef Q_OS_MAC
+                  !(e->state() & Qt::AltButton) &&
+#endif
+                  !(e->state() & Qt::MetaButton)) ||
+                 (((e->state() & (Qt::ControlButton | Qt::AltButton))) == (Qt::ControlButton|Qt::AltButton))) &&
+                 (!ascii || ascii >= 32 || e->text() == QString(QLatin1Char('\t')))) {
+                clearUndoRedoInfo = false;
+                if (e->key() == Qt::Key_Tab) {
+                    if (d->tabChangesFocus) {
+                        e->ignore();
+                        break;
+                    }
+                    if (textFormat() == Qt::RichText && cursor->index() == 0
+                         && (cursor->paragraph()->isListItem() || cursor->paragraph()->listDepth())) {
+                        clearUndoRedo();
+                        undoRedoInfo.type = UndoRedoInfo::Style;
+                        undoRedoInfo.id = cursor->paragraph()->paragId();
+                        undoRedoInfo.eid = undoRedoInfo.id;
+                        undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
+                        cursor->paragraph()->setListDepth(cursor->paragraph()->listDepth() +1);
+                        clearUndoRedo();
+                        drawCursor(false);
+                        repaintChanged();
+                        drawCursor(true);
+                        break;
+                    }
+                } else if (e->key() == Qt::Key_BackTab) {
+                    if (d->tabChangesFocus) {
+                        e->ignore();
+                        break;
+                    }
+                }
+
+                if ((autoFormatting() & AutoBulletList) &&
+                     textFormat() == Qt::RichText && cursor->index() == 0
+                     && !cursor->paragraph()->isListItem()
+                     && (e->text()[0] == QLatin1Char('-') || e->text()[0] == QLatin1Char('*'))) {
+                        clearUndoRedo();
+                        undoRedoInfo.type = UndoRedoInfo::Style;
+                        undoRedoInfo.id = cursor->paragraph()->paragId();
+                        undoRedoInfo.eid = undoRedoInfo.id;
+                        undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
+                        setParagType(Q3StyleSheetItem::DisplayListItem, Q3StyleSheetItem::ListDisc);
+                        clearUndoRedo();
+                        drawCursor(false);
+                        repaintChanged();
+                        drawCursor(true);
+                        break;
+                }
+		if (overWrite && !cursor->atParagEnd() && !doc->hasSelection(Q3TextDocument::Standard)) {
+                    doKeyboardAction(ActionDelete);
+                    clearUndoRedoInfo = false;
+                }
+                QString t = e->text();
+                insert(t, true, false);
+                break;
+            } else if (e->state() & Qt::ControlButton) {
+                switch (e->key()) {
+                case Qt::Key_C: case Qt::Key_F16: // Copy key on Sun keyboards
+                    copy();
+                    break;
+                case Qt::Key_V:
+                    paste();
+                    break;
+                case Qt::Key_X:
+                    cut();
+                    break;
+                case Qt::Key_I: case Qt::Key_T: case Qt::Key_Tab:
+                    if (!d->tabChangesFocus)
+                        indent();
+                    break;
+                case Qt::Key_A:
+#if defined(Q_WS_X11)
+                    moveCursor(MoveLineStart, e->state() & Qt::ShiftButton);
+#else
+                    selectAll(true);
+#endif
+                    break;
+                case Qt::Key_B:
+                    moveCursor(MoveBackward, e->state() & Qt::ShiftButton);
+                    break;
+                case Qt::Key_F:
+                    moveCursor(MoveForward, e->state() & Qt::ShiftButton);
+                    break;
+                case Qt::Key_D:
+                    if (doc->hasSelection(Q3TextDocument::Standard)) {
+                        removeSelectedText();
+                        break;
+                    }
+                    doKeyboardAction(ActionDelete);
+                    clearUndoRedoInfo = false;
+                    break;
+                case Qt::Key_H:
+                    if (doc->hasSelection(Q3TextDocument::Standard)) {
+                        removeSelectedText();
+                        break;
+                    }
+                    if (!cursor->paragraph()->prev() &&
+                         cursor->atParagStart())
+                        break;
+
+                    doKeyboardAction(ActionBackspace);
+                    clearUndoRedoInfo = false;
+                    break;
+                case Qt::Key_E:
+                    moveCursor(MoveLineEnd, e->state() & Qt::ShiftButton);
+                    break;
+                case Qt::Key_N:
+                    moveCursor(MoveDown, e->state() & Qt::ShiftButton);
+                    break;
+                case Qt::Key_P:
+                    moveCursor(MoveUp, e->state() & Qt::ShiftButton);
+                    break;
+                case Qt::Key_Z:
+                    if(e->state() & Qt::ShiftButton)
+                        redo();
+                    else
+                        undo();
+                    break;
+                case Qt::Key_Y:
+                    redo();
+                    break;
+                case Qt::Key_K:
+                    doKeyboardAction(ActionKill);
+                    break;
+#if defined(Q_WS_WIN)
+                case Qt::Key_Insert:
+                    copy();
+                    break;
+                case Qt::Key_Delete:
+                    del();
+                    break;
+#endif
+                default:
+                    unknownKey = false;
+                    break;
+                }
+            } else {
+                unknownKey = true;
+            }
+        }
+    }
+
+    emit cursorPositionChanged(cursor);
+    emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+    if (clearUndoRedoInfo)
+        clearUndoRedo();
+    changeIntervalTimer->start(100, true);
+    if (unknownKey)
+        e->ignore();
+}
+
+/*!
+    \reimp
+*/
+void Q3TextEdit::inputMethodEvent(QInputMethodEvent *e)
+{
+    if (isReadOnly()) {
+        e->ignore();
+        return;
+    }
+
+    if (hasSelectedText())
+        removeSelectedText();
+    clearUndoRedo();
+    undoRedoInfo.type = UndoRedoInfo::IME;
+
+    bool oldupdate = updatesEnabled();
+    if (oldupdate)
+        setUpdatesEnabled(false);
+    bool sigs_blocked = signalsBlocked();
+    blockSignals(true);
+    const int preeditSelectionBase = 31900;
+    for (int i = 0; i < d->numPreeditSelections; ++i)
+        doc->removeSelection(preeditSelectionBase + i);
+    d->numPreeditSelections = 0;
+
+    if (d->preeditLength > 0 && cursor->paragraph()) {
+        cursor->setIndex(d->preeditStart);
+        cursor->paragraph()->remove(d->preeditStart, d->preeditLength);
+        d->preeditStart = d->preeditLength = -1;
+    }
+
+    if (!e->commitString().isEmpty() || e->replacementLength()) {
+        int c = cursor->index(); // cursor position after insertion of commit string
+        if (e->replacementStart() <= 0)
+            c += e->commitString().length() + qMin(-e->replacementStart(), e->replacementLength());
+        cursor->setIndex(cursor->index() + e->replacementStart());
+        doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+        cursor->setIndex(cursor->index() + e->replacementLength());
+        doc->setSelectionEnd(Q3TextDocument::Standard, *cursor);
+        removeSelectedText();
+	if (undoRedoInfo.type == UndoRedoInfo::IME)
+	    undoRedoInfo.type = UndoRedoInfo::Invalid;
+        insert(e->commitString());
+	undoRedoInfo.type = UndoRedoInfo::IME;
+        cursor->setIndex(c);
+    }
+
+    if (!e->preeditString().isEmpty()) {
+        d->preeditStart = cursor->index();
+        d->preeditLength = e->preeditString().length();
+	insert(e->preeditString());
+        cursor->setIndex(d->preeditStart);
+
+        Q3TextCursor c = *cursor;
+        for (int i = 0; i < e->attributes().size(); ++i) {
+            const QInputMethodEvent::Attribute &a = e->attributes().at(i);
+            if (a.type == QInputMethodEvent::Cursor)
+                cursor->setIndex(cursor->index() + a.start);
+            else if (a.type != QInputMethodEvent::TextFormat)
+                continue;
+            QTextCharFormat f = qvariant_cast<QTextFormat>(a.value).toCharFormat();
+            if (f.isValid()) {
+                Q3TextCursor c2 = c;
+                c2.setIndex(c.index() + a.start);
+                doc->setSelectionStart(preeditSelectionBase + d->numPreeditSelections, c2);
+                c2.setIndex(c.index() + a.start + a.length);
+                doc->setSelectionEnd(preeditSelectionBase + d->numPreeditSelections, c2);
+
+                QColor c = f.hasProperty(QTextFormat::BackgroundBrush) ? f.background().color() : QColor();
+                doc->setSelectionColor(preeditSelectionBase + d->numPreeditSelections, c);
+                c = f.hasProperty(QTextFormat::ForegroundBrush) ? f.foreground().color() : QColor();
+                doc->setSelectionTextColor(preeditSelectionBase + d->numPreeditSelections, c);
+                if (f.fontUnderline()) {
+                    Q3TextParagraph *par = cursor->paragraph();
+                    Q3TextFormat f(*par->string()->at(d->preeditStart).format());
+                    f.setUnderline(true);
+                    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+                    par->setFormat(d->preeditStart + a.start, a.length, f2);
+                }
+                ++d->numPreeditSelections;
+            }
+	}
+    } else {
+	undoRedoInfo.type = UndoRedoInfo::Invalid;
+    }
+    blockSignals(sigs_blocked);
+    if (oldupdate)
+        setUpdatesEnabled(true);
+    if (!e->commitString().isEmpty())
+        emit textChanged();
+    repaintChanged();
+}
+
+
+static bool qtextedit_ignore_readonly = false;
+
+/*!
+    Executes keyboard action \a action. This is normally called by a
+    key event handler.
+*/
+
+void Q3TextEdit::doKeyboardAction(Q3TextEdit::KeyboardAction action)
+{
+    if (isReadOnly() && !qtextedit_ignore_readonly)
+        return;
+
+    if (cursor->nestedDepth() != 0)
+        return;
+
+    lastFormatted = cursor->paragraph();
+    drawCursor(false);
+    bool doUpdateCurrentFormat = true;
+
+    switch (action) {
+    case ActionWordDelete:
+    case ActionDelete:
+        if (action == ActionDelete && !cursor->atParagEnd()) {
+            if (undoEnabled) {
+                checkUndoRedoInfo(UndoRedoInfo::Delete);
+                if (!undoRedoInfo.valid()) {
+                    undoRedoInfo.id = cursor->paragraph()->paragId();
+                    undoRedoInfo.index = cursor->index();
+                    undoRedoInfo.d->text.clear();
+                }
+                int idx = cursor->index();
+                do {
+                    undoRedoInfo.d->text.insert(undoRedoInfo.d->text.length(), cursor->paragraph()->at(idx++), true);
+                } while (!cursor->paragraph()->string()->validCursorPosition(idx));
+            }
+            cursor->remove();
+        } else {
+            clearUndoRedo();
+            doc->setSelectionStart(Q3TextDocument::Temp, *cursor);
+            if (action == ActionWordDelete && !cursor->atParagEnd()) {
+                cursor->gotoNextWord();
+            } else {
+                cursor->gotoNextLetter();
+            }
+            doc->setSelectionEnd(Q3TextDocument::Temp, *cursor);
+            removeSelectedText(Q3TextDocument::Temp);
+        }
+        break;
+    case ActionWordBackspace:
+    case ActionBackspace:
+        if (textFormat() == Qt::RichText
+             && (cursor->paragraph()->isListItem()
+                 || cursor->paragraph()->listDepth())
+             && cursor->index() == 0) {
+            if (undoEnabled) {
+                clearUndoRedo();
+                undoRedoInfo.type = UndoRedoInfo::Style;
+                undoRedoInfo.id = cursor->paragraph()->paragId();
+                undoRedoInfo.eid = undoRedoInfo.id;
+                undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
+            }
+            int ldepth = cursor->paragraph()->listDepth();
+            if (cursor->paragraph()->isListItem() && ldepth == 1) {
+                cursor->paragraph()->setListItem(false);
+            } else if (qMax(ldepth, 1) == 1) {
+                cursor->paragraph()->setListItem(false);
+                cursor->paragraph()->setListDepth(0);
+            } else {
+                cursor->paragraph()->setListDepth(ldepth - 1);
+            }
+            clearUndoRedo();
+            lastFormatted = cursor->paragraph();
+            repaintChanged();
+            drawCursor(true);
+            return;
+        }
+
+        if (action == ActionBackspace && !cursor->atParagStart()) {
+            if (undoEnabled) {
+                checkUndoRedoInfo(UndoRedoInfo::Delete);
+                if (!undoRedoInfo.valid()) {
+                    undoRedoInfo.id = cursor->paragraph()->paragId();
+                    undoRedoInfo.index = cursor->index();
+                    undoRedoInfo.d->text.clear();
+                }
+                undoRedoInfo.d->text.insert(0, cursor->paragraph()->at(cursor->index()-1), true);
+                undoRedoInfo.index = cursor->index()-1;
+            }
+            cursor->removePreviousChar();
+            lastFormatted = cursor->paragraph();
+        } else if (cursor->paragraph()->prev()
+                    || (action == ActionWordBackspace
+                        && !cursor->atParagStart())) {
+            clearUndoRedo();
+            doc->setSelectionStart(Q3TextDocument::Temp, *cursor);
+            if (action == ActionWordBackspace && !cursor->atParagStart()) {
+                cursor->gotoPreviousWord();
+            } else {
+                cursor->gotoPreviousLetter();
+            }
+            doc->setSelectionEnd(Q3TextDocument::Temp, *cursor);
+            removeSelectedText(Q3TextDocument::Temp);
+        }
+        break;
+    case ActionReturn:
+        if (undoEnabled) {
+            checkUndoRedoInfo(UndoRedoInfo::Return);
+            if (!undoRedoInfo.valid()) {
+                undoRedoInfo.id = cursor->paragraph()->paragId();
+                undoRedoInfo.index = cursor->index();
+                undoRedoInfo.d->text.clear();
+            }
+            undoRedoInfo.d->text += QString(QLatin1Char('\n'));
+        }
+        cursor->splitAndInsertEmptyParagraph();
+        if (cursor->paragraph()->prev()) {
+            lastFormatted = cursor->paragraph()->prev();
+            lastFormatted->invalidate(0);
+        }
+        doUpdateCurrentFormat = false;
+        break;
+    case ActionKill:
+        clearUndoRedo();
+        doc->setSelectionStart(Q3TextDocument::Temp, *cursor);
+        if (cursor->atParagEnd())
+            cursor->gotoNextLetter();
+        else
+            cursor->setIndex(cursor->paragraph()->length() - 1);
+        doc->setSelectionEnd(Q3TextDocument::Temp, *cursor);
+        removeSelectedText(Q3TextDocument::Temp);
+        break;
+    }
+
+    formatMore();
+    repaintChanged();
+    ensureCursorVisible();
+    drawCursor(true);
+    if (doUpdateCurrentFormat)
+        updateCurrentFormat();
+    setModified();
+    emit textChanged();
+}
+
+void Q3TextEdit::readFormats(Q3TextCursor &c1, Q3TextCursor &c2, Q3TextString &text, bool fillStyles)
+{
+#ifndef QT_NO_DATASTREAM
+    QDataStream styleStream(&undoRedoInfo.styleInformation, IO_WriteOnly);
+#endif
+    c2.restoreState();
+    c1.restoreState();
+    int lastIndex = text.length();
+    if (c1.paragraph() == c2.paragraph()) {
+        for (int i = c1.index(); i < c2.index(); ++i)
+            text.insert(lastIndex + i - c1.index(), c1.paragraph()->at(i), true);
+#ifndef QT_NO_DATASTREAM
+        if (fillStyles) {
+            styleStream << (int) 1;
+            c1.paragraph()->writeStyleInformation(styleStream);
+        }
+#endif
+    } else {
+        int i;
+        for (i = c1.index(); i < c1.paragraph()->length()-1; ++i)
+            text.insert(lastIndex++, c1.paragraph()->at(i), true);
+        int num = 2; // start and end, being different
+        text += QString(QLatin1Char('\n')); lastIndex++;
+
+        if (c1.paragraph()->next() != c2.paragraph()) {
+            num += text.appendParagraphs(c1.paragraph()->next(), c2.paragraph());
+            lastIndex = text.length();
+        }
+
+        for (i = 0; i < c2.index(); ++i)
+            text.insert(i + lastIndex, c2.paragraph()->at(i), true);
+#ifndef QT_NO_DATASTREAM
+        if (fillStyles) {
+            styleStream << num;
+            for (Q3TextParagraph *p = c1.paragraph(); --num >= 0; p = p->next())
+                p->writeStyleInformation(styleStream);
+        }
+#endif
+    }
+}
+
+/*!
+    Removes the selection \a selNum (by default 0). This does not
+    remove the selected text.
+
+    \sa removeSelectedText()
+*/
+
+void Q3TextEdit::removeSelection(int selNum)
+{
+    doc->removeSelection(selNum);
+    repaintChanged();
+}
+
+/*!
+    Deletes the text of selection \a selNum (by default, the default
+    selection, 0). If there is no selected text nothing happens.
+
+    \sa selectedText removeSelection()
+*/
+
+void Q3TextEdit::removeSelectedText(int selNum)
+{
+    Q3TextCursor c1 = doc->selectionStartCursor(selNum);
+    c1.restoreState();
+    Q3TextCursor c2 = doc->selectionEndCursor(selNum);
+    c2.restoreState();
+
+    // ### no support for editing tables yet, plus security for broken selections
+    if (c1.nestedDepth() || c2.nestedDepth())
+        return;
+
+    for (int i = 0; i < (int)doc->numSelections(); ++i) {
+        if (i == selNum)
+            continue;
+        doc->removeSelection(i);
+    }
+
+    drawCursor(false);
+    if (undoEnabled) {
+        checkUndoRedoInfo(UndoRedoInfo::RemoveSelected);
+        if (!undoRedoInfo.valid()) {
+            doc->selectionStart(selNum, undoRedoInfo.id, undoRedoInfo.index);
+            undoRedoInfo.d->text.clear();
+        }
+        readFormats(c1, c2, undoRedoInfo.d->text, true);
+    }
+
+    doc->removeSelectedText(selNum, cursor);
+    if (cursor->isValid()) {
+        lastFormatted = 0; // make sync a noop
+        ensureCursorVisible();
+        lastFormatted = cursor->paragraph();
+        formatMore();
+        repaintContents();
+        ensureCursorVisible();
+        drawCursor(true);
+        clearUndoRedo();
+#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());
+#endif
+#ifndef QT_NO_CURSOR
+        viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+    } else {
+        lastFormatted = doc->firstParagraph();
+        delete cursor;
+        cursor = new Q3TextCursor(doc);
+        drawCursor(true);
+        repaintContents();
+    }
+    setModified();
+    emit textChanged();
+    emit selectionChanged();
+    emit copyAvailable(doc->hasSelection(Q3TextDocument::Standard));
+}
+
+/*!
+    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 Q3TextEdit::moveCursor(Q3TextEdit::CursorAction action, bool select)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return;
+#endif
+#ifdef Q_WS_MAC
+    Q3TextCursor c1 = *cursor;
+    Q3TextCursor c2;
+#endif
+    drawCursor(false);
+    if (select) {
+        if (!doc->hasSelection(Q3TextDocument::Standard))
+            doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+        moveCursor(action);
+#ifdef Q_WS_MAC
+        c2 = *cursor;
+        if (c1 == c2)
+            if (action == MoveDown || action == MovePgDown)
+                moveCursor(MoveEnd);
+            else if (action == MoveUp || action == MovePgUp)
+                moveCursor(MoveHome);
+#endif
+        if (doc->setSelectionEnd(Q3TextDocument::Standard, *cursor)) {
+            cursor->paragraph()->document()->nextDoubleBuffered = true;
+            repaintChanged();
+        } else {
+            drawCursor(true);
+        }
+        ensureCursorVisible();
+        emit selectionChanged();
+        emit copyAvailable(doc->hasSelection(Q3TextDocument::Standard));
+    } else {
+#ifdef Q_WS_MAC
+        Q3TextCursor cStart = doc->selectionStartCursor(Q3TextDocument::Standard);
+        Q3TextCursor cEnd = doc->selectionEndCursor(Q3TextDocument::Standard);
+        bool redraw = doc->removeSelection(Q3TextDocument::Standard);
+        if (redraw && action == MoveDown)
+            *cursor = cEnd;
+        else if (redraw && action == MoveUp)
+            *cursor = cStart;
+        if (redraw && action == MoveForward)
+            *cursor = cEnd;
+        else if (redraw && action == MoveBackward)
+            *cursor = cStart;
+        else
+            moveCursor(action);
+        c2 = *cursor;
+        if (c1 == c2)
+            if (action == MoveDown)
+                moveCursor(MoveEnd);
+            else if (action == MoveUp)
+                moveCursor(MoveHome);
+#else
+        bool redraw = doc->removeSelection(Q3TextDocument::Standard);
+        moveCursor(action);
+#endif
+        if (!redraw) {
+            ensureCursorVisible();
+            drawCursor(true);
+        } else {
+            cursor->paragraph()->document()->nextDoubleBuffered = true;
+            repaintChanged();
+            ensureCursorVisible();
+            drawCursor(true);
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+        }
+        if (redraw) {
+            emit copyAvailable(doc->hasSelection(Q3TextDocument::Standard));
+            emit selectionChanged();
+        }
+    }
+
+    drawCursor(true);
+    updateCurrentFormat();
+}
+
+/*!
+    \overload
+*/
+
+void Q3TextEdit::moveCursor(Q3TextEdit::CursorAction action)
+{
+    resetInputContext();
+    switch (action) {
+    case MoveBackward:
+        cursor->gotoPreviousLetter();
+        break;
+    case MoveWordBackward:
+        cursor->gotoPreviousWord();
+        break;
+    case MoveForward:
+        cursor->gotoNextLetter();
+        break;
+    case MoveWordForward:
+        cursor->gotoNextWord();
+        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:
+        ensureFormatted(doc->lastParagraph());
+        cursor->gotoEnd();
+        break;
+    }
+    updateCurrentFormat();
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::resizeEvent(QResizeEvent *e)
+{
+    Q3ScrollView::resizeEvent(e);
+    if (doc->visibleWidth() == 0)
+        doResize();
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::viewportResizeEvent(QResizeEvent *e)
+{
+    Q3ScrollView::viewportResizeEvent(e);
+    if (e->oldSize().width() != e->size().width()) {
+        bool stayAtBottom = e->oldSize().height() != e->size().height() &&
+               contentsY() > 0 && contentsY() >= doc->height() - e->oldSize().height();
+        doResize();
+        if (stayAtBottom)
+            scrollToBottom();
+    }
+}
+
+/*!
+    Ensures that the cursor is visible by scrolling the text edit if
+    necessary.
+
+    \sa setCursorPosition()
+*/
+
+void Q3TextEdit::ensureCursorVisible()
+{
+    // Not visible or the user is dragging the window, so don't position to caret yet
+    if (!updatesEnabled() || !isVisible() || isHorizontalSliderPressed() || isVerticalSliderPressed()) {
+        d->ensureCursorVisibleInShowEvent = true;
+        return;
+    }
+    sync();
+    Q3TextStringChar *chr = cursor->paragraph()->at(cursor->index());
+    int h = cursor->paragraph()->lineHeightOfChar(cursor->index());
+    int x = cursor->paragraph()->rect().x() + chr->x + cursor->offsetX();
+    int y = 0; int dummy;
+    cursor->paragraph()->lineHeightOfChar(cursor->index(), &dummy, &y);
+    y += cursor->paragraph()->rect().y() + cursor->offsetY();
+    int w = 1;
+    ensureVisible(x, y + h / 2, w, h / 2 + 2);
+}
+
+/*!
+    \internal
+*/
+void Q3TextEdit::sliderReleased()
+{
+    if (d->ensureCursorVisibleInShowEvent && isVisible()) {
+        d->ensureCursorVisibleInShowEvent = false;
+        ensureCursorVisible();
+    }
+}
+
+/*!
+    \internal
+
+    If \a visible is true, the cursor is shown; otherwise it is
+    hidden.
+*/
+void Q3TextEdit::drawCursor(bool visible)
+{
+    d->cursorRepaintMode = true;
+    blinkCursorVisible = visible;
+    QRect r(cursor->topParagraph()->rect());
+    if (!cursor->nestedDepth()) {
+        int h = cursor->paragraph()->lineHeightOfChar(cursor->index());
+        r = QRect(r.x(), r.y() + cursor->y(), r.width(), h);
+    }
+    r.moveBy(-contentsX(), -contentsY());
+    viewport()->update(r);
+}
+
+enum {
+    IdUndo = 0,
+    IdRedo = 1,
+    IdCut = 2,
+    IdCopy = 3,
+    IdPaste = 4,
+    IdClear = 5,
+    IdSelectAll = 6
+};
+
+/*!
+    \reimp
+*/
+#ifndef QT_NO_WHEELEVENT
+void Q3TextEdit::contentsWheelEvent(QWheelEvent *e)
+{
+    if (isReadOnly()) {
+        if (e->state() & Qt::ControlButton) {
+            if (e->delta() > 0)
+                zoomOut();
+            else if (e->delta() < 0)
+                zoomIn();
+            return;
+        }
+    }
+    Q3ScrollView::contentsWheelEvent(e);
+}
+#endif
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsMousePressEvent(QMouseEvent *e)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimMousePressEvent(e);
+        return;
+    }
+#endif
+
+#if !defined(QT_NO_IM)
+    if (e->button() == Qt::LeftButton && d->preeditLength > 0 && cursor->paragraph()) {
+        Q3TextCursor c = *cursor;
+        placeCursor(e->pos(), &c, false);
+        inputContext()->mouseHandler(c.index() - d->preeditStart, e);
+        if (d->preeditLength > 0)
+            return;
+    }
+#endif
+        
+    if (d->trippleClickTimer->isActive() &&
+         (e->globalPos() - d->trippleClickPoint).manhattanLength() <
+         QApplication::startDragDistance()) {
+        Q3TextCursor c1 = *cursor;
+        Q3TextCursor c2 = *cursor;
+        c1.gotoLineStart();
+        c2.gotoLineEnd();
+        doc->setSelectionStart(Q3TextDocument::Standard, c1);
+        doc->setSelectionEnd(Q3TextDocument::Standard, c2);
+        *cursor = c2;
+        repaintChanged();
+        mousePressed = true;
+        return;
+    }
+
+    clearUndoRedo();
+    Q3TextCursor oldCursor = *cursor;
+    Q3TextCursor c = *cursor;
+    mousePos = e->pos();
+    mightStartDrag = false;
+    pressedLink.clear();
+    d->pressedName.clear();
+
+    if (e->button() == Qt::LeftButton) {
+        mousePressed = true;
+        drawCursor(false);
+        placeCursor(e->pos());
+        ensureCursorVisible();
+
+        if (isReadOnly() && linksEnabled()) {
+            Q3TextCursor c = *cursor;
+            placeCursor(e->pos(), &c, true);
+            if (c.paragraph() && c.paragraph()->at(c.index()) &&
+                 c.paragraph()->at(c.index())->isAnchor()) {
+                pressedLink = c.paragraph()->at(c.index())->anchorHref();
+                d->pressedName = c.paragraph()->at(c.index())->anchorName();
+            }
+        }
+
+#ifndef QT_NO_DRAGANDDROP
+        if (doc->inSelection(Q3TextDocument::Standard, e->pos())) {
+            mightStartDrag = true;
+            drawCursor(true);
+            dragStartTimer->start(QApplication::startDragTime(), true);
+            dragStartPos = e->pos();
+            return;
+        }
+#endif
+
+        bool redraw = false;
+        if (doc->hasSelection(Q3TextDocument::Standard)) {
+            if (!(e->state() & Qt::ShiftButton)) {
+                redraw = doc->removeSelection(Q3TextDocument::Standard);
+                doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+            } else {
+                redraw = doc->setSelectionEnd(Q3TextDocument::Standard, *cursor) || redraw;
+            }
+        } else {
+            if (isReadOnly() || !(e->state() & Qt::ShiftButton)) {
+                doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+            } else {
+                doc->setSelectionStart(Q3TextDocument::Standard, c);
+                redraw = doc->setSelectionEnd(Q3TextDocument::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() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+        }
+    } else if (e->button() == Qt::MidButton) {
+        bool redraw = doc->removeSelection(Q3TextDocument::Standard);
+        if (!redraw) {
+            drawCursor(true);
+        } else {
+            repaintChanged();
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+        }
+    }
+
+    if (*cursor != oldCursor)
+        updateCurrentFormat();
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsMouseMoveEvent(QMouseEvent *e)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimMouseMoveEvent(e);
+        return;
+    }
+#endif
+    
+#if !defined(QT_NO_IM)
+    if (d->preeditLength > 0) 
+        return;
+#endif
+    
+    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(Qt::IBeamCursor);
+#endif
+            return;
+        }
+#endif
+        mousePos = e->pos();
+        handleMouseMove(mousePos);
+        oldMousePos = mousePos;
+    }
+
+#ifndef QT_NO_CURSOR
+    if (!isReadOnly() && !mousePressed) {
+        if (doc->hasSelection(Q3TextDocument::Standard) && doc->inSelection(Q3TextDocument::Standard, e->pos()))
+            viewport()->setCursor(Qt::ArrowCursor);
+        else
+            viewport()->setCursor(Qt::IBeamCursor);
+    }
+#endif
+    updateCursor(e->pos());
+}
+
+void Q3TextEdit::copyToClipboard()
+{
+#ifndef QT_NO_CLIPBOARD
+    if (QApplication::clipboard()->supportsSelection()) {
+        d->clipboard_mode = QClipboard::Selection;
+
+        // don't listen to selection changes
+        disconnect(QApplication::clipboard(), SIGNAL(selectionChanged()), this, 0);
+        copy();
+        // listen to selection changes
+        connect(QApplication::clipboard(), SIGNAL(selectionChanged()),
+                 this, SLOT(clipboardChanged()));
+
+        d->clipboard_mode = QClipboard::Clipboard;
+    }
+#endif
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsMouseReleaseEvent(QMouseEvent * e)
+{
+    if (!inDoubleClick) { // could be the release of a dblclick
+        int para = 0;
+        int index = charAt(e->pos(), &para);
+        emit clicked(para, index);
+    }
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimMouseReleaseEvent(e);
+        return;
+    }
+#endif
+    Q3TextCursor 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;
+        copyToClipboard();
+    }
+#ifndef QT_NO_CLIPBOARD
+    else if (e->button() == Qt::MidButton && !isReadOnly()) {
+        // only do middle-click pasting on systems that have selections (ie. X11)
+        if (QApplication::clipboard()->supportsSelection()) {
+            drawCursor(false);
+            placeCursor(e->pos());
+            ensureCursorVisible();
+            doc->setSelectionStart(Q3TextDocument::Standard, oldCursor);
+            bool redraw = false;
+            if (doc->hasSelection(Q3TextDocument::Standard)) {
+                redraw = doc->removeSelection(Q3TextDocument::Standard);
+                doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+            } else {
+                doc->setSelectionStart(Q3TextDocument::Standard, *cursor);
+            }
+            // start with 1 as we don't want to remove the Standard-Selection
+            for (int i = 1; i < doc->numSelections(); ++i)
+                redraw = doc->removeSelection(i) || redraw;
+            if (!redraw) {
+                drawCursor(true);
+            } else {
+                repaintChanged();
+#ifndef QT_NO_CURSOR
+                viewport()->setCursor(Qt::IBeamCursor);
+#endif
+            }
+            d->clipboard_mode = QClipboard::Selection;
+            paste();
+            d->clipboard_mode = QClipboard::Clipboard;
+        }
+    }
+#endif
+    emit cursorPositionChanged(cursor);
+    emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+    if (oldCursor != *cursor)
+        updateCurrentFormat();
+    inDoubleClick = false;
+
+#ifndef QT_NO_NETWORKPROTOCOL
+    if ((  (!onLink.isEmpty() && onLink == pressedLink)
+          || (!d->onName.isEmpty() && d->onName == d->pressedName))
+         && linksEnabled()) {
+        if (!onLink.isEmpty()) {
+            QUrl u = QUrl(doc->context()).resolved(onLink);
+            emitLinkClicked(u.toString(QUrl::None));
+        }
+        if (Q3TextBrowser *browser = qobject_cast<Q3TextBrowser*>(this))
+            emit browser->anchorClicked(d->onName, onLink);
+
+        // emitting linkClicked() may result in that the cursor winds
+        // up hovering over a different valid link - check this and
+        // set the appropriate cursor shape
+        updateCursor(e->pos());
+    }
+#endif
+    drawCursor(true);
+    if (!doc->hasSelection(Q3TextDocument::Standard, true))
+        doc->removeSelection(Q3TextDocument::Standard);
+
+    emit copyAvailable(doc->hasSelection(Q3TextDocument::Standard));
+    emit selectionChanged();
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsMouseDoubleClickEvent(QMouseEvent * e)
+{
+    if (e->button() != Qt::LeftButton) {
+        e->ignore();
+        return;
+    }
+#if !defined(QT_NO_IM)
+    if (d->preeditLength > 0) 
+        return;
+#endif
+    
+    int para = 0;
+    int index = charAt(e->pos(), &para);
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        QString str = d->od->lines[LOGOFFSET(para)];
+        int startIdx = index, endIdx = index, i;
+        if (!str[index].isSpace()) {
+            i = startIdx;
+            // find start of word
+            while (i >= 0 && !str[i].isSpace()) {
+                startIdx = i--;
+            }
+            i = endIdx;
+            // find end of word..
+            while (i < str.length() && !str[i].isSpace()) {
+                endIdx = ++i;
+            }
+            // ..and start of next
+            while (i < str.length() && str[i].isSpace()) {
+                endIdx = ++i;
+            }
+            optimSetSelection(para, startIdx, para, endIdx);
+            repaintContents();
+        }
+    } else
+#endif
+    {
+        Q3TextCursor c1 = *cursor;
+        Q3TextCursor c2 = *cursor;
+#if defined(Q_OS_MAC)
+        Q3TextParagraph *para = cursor->paragraph();
+        if (cursor->isValid()) {
+            if (para->at(cursor->index())->c.isLetterOrNumber()) {
+                while (c1.index() > 0 &&
+                        c1.paragraph()->at(c1.index()-1)->c.isLetterOrNumber())
+                    c1.gotoPreviousLetter();
+                while (c2.paragraph()->at(c2.index())->c.isLetterOrNumber() &&
+                        !c2.atParagEnd())
+                    c2.gotoNextLetter();
+            } else if (para->at(cursor->index())->c.isSpace()) {
+                while (c1.index() > 0 &&
+                        c1.paragraph()->at(c1.index()-1)->c.isSpace())
+                    c1.gotoPreviousLetter();
+                while (c2.paragraph()->at(c2.index())->c.isSpace() &&
+                        !c2.atParagEnd())
+                    c2.gotoNextLetter();
+            } else if (!c2.atParagEnd()) {
+                c2.gotoNextLetter();
+            }
+        }
+#else
+        if (cursor->index() > 0 && !cursor->paragraph()->at(cursor->index()-1)->c.isSpace())
+            c1.gotoPreviousWord();
+        if (!cursor->paragraph()->at(cursor->index())->c.isSpace() && !cursor->atParagEnd())
+            c2.gotoNextWord();
+#endif
+        doc->setSelectionStart(Q3TextDocument::Standard, c1);
+        doc->setSelectionEnd(Q3TextDocument::Standard, c2);
+
+        *cursor = c2;
+
+        repaintChanged();
+
+        d->trippleClickTimer->start(qApp->doubleClickInterval(), true);
+        d->trippleClickPoint = e->globalPos();
+    }
+    inDoubleClick = true;
+    mousePressed = true;
+    emit doubleClicked(para, index);
+}
+
+#ifndef QT_NO_DRAGANDDROP
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsDragEnterEvent(QDragEnterEvent *e)
+{
+    if (isReadOnly() || !Q3TextDrag::canDecode(e)) {
+        e->ignore();
+        return;
+    }
+    e->acceptAction();
+    inDnD = true;
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsDragMoveEvent(QDragMoveEvent *e)
+{
+    if (isReadOnly() || !Q3TextDrag::canDecode(e)) {
+        e->ignore();
+        return;
+    }
+    drawCursor(false);
+    placeCursor(e->pos(),  cursor);
+    drawCursor(true);
+    e->acceptAction();
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsDragLeaveEvent(QDragLeaveEvent *)
+{
+    drawCursor(false);
+    inDnD = false;
+}
+
+/*!
+    \reimp
+*/
+
+void Q3TextEdit::contentsDropEvent(QDropEvent *e)
+{
+    if (isReadOnly())
+        return;
+    inDnD = false;
+    e->acceptAction();
+    bool intern = false;
+    if (Q3RichTextDrag::canDecode(e)) {
+        bool hasSel = doc->hasSelection(Q3TextDocument::Standard);
+        bool internalDrag = e->source() == this || e->source() == viewport();
+        int dropId, dropIndex;
+        Q3TextCursor insertCursor = *cursor;
+        dropId = cursor->paragraph()->paragId();
+        dropIndex = cursor->index();
+        if (hasSel && internalDrag) {
+            Q3TextCursor c1, c2;
+            int selStartId, selStartIndex;
+            int selEndId, selEndIndex;
+            c1 = doc->selectionStartCursor(Q3TextDocument::Standard);
+            c1.restoreState();
+            c2 = doc->selectionEndCursor(Q3TextDocument::Standard);
+            c2.restoreState();
+            selStartId = c1.paragraph()->paragId();
+            selStartIndex = c1.index();
+            selEndId = c2.paragraph()->paragId();
+            selEndIndex = c2.index();
+            if (((dropId > selStartId) ||
+                   (dropId == selStartId && dropIndex > selStartIndex)) &&
+                 ((dropId < selEndId) ||
+                   (dropId == selEndId && dropIndex <= selEndIndex)))
+                insertCursor = c1;
+            if (dropId == selEndId && dropIndex > selEndIndex) {
+                insertCursor = c1;
+                if (selStartId == selEndId) {
+                    insertCursor.setIndex(dropIndex -
+                                           (selEndIndex - selStartIndex));
+                } else {
+                    insertCursor.setIndex(dropIndex - selEndIndex +
+                                           selStartIndex);
+                }
+            }
+         }
+
+        if (internalDrag && e->action() == QDropEvent::Move) {
+            removeSelectedText();
+            intern = true;
+            doc->removeSelection(Q3TextDocument::Standard);
+        } else {
+            doc->removeSelection(Q3TextDocument::Standard);
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+        }
+        drawCursor(false);
+        cursor->setParagraph(insertCursor.paragraph());
+        cursor->setIndex(insertCursor.index());
+        drawCursor(true);
+        if (!cursor->nestedDepth()) {
+            QString subType = QLatin1String("plain");
+            if (textFormat() != Qt::PlainText) {
+                if (e->provides("application/x-qrichtext"))
+                    subType = QLatin1String("x-qrichtext");
+            }
+#ifndef QT_NO_CLIPBOARD
+            pasteSubType(subType.toLatin1(), e);
+#endif
+            // emit appropriate signals.
+            emit selectionChanged();
+            emit cursorPositionChanged(cursor);
+            emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+        } else {
+            if (intern)
+                undo();
+            e->ignore();
+        }
+    }
+}
+
+#endif
+
+/*!
+    \reimp
+*/
+void Q3TextEdit::contentsContextMenuEvent(QContextMenuEvent *e)
+{
+    clearUndoRedo();
+    mousePressed = false;
+
+    e->accept();
+#ifndef QT_NO_POPUPMENU
+    Q3PopupMenu *popup = createPopupMenu(e->pos());
+    if (!popup)
+        popup = createPopupMenu();
+    if (!popup)
+        return;
+    int r = popup->exec(e->globalPos(), -1);
+    delete popup;
+
+    if (r == d->id[IdClear])
+        clear();
+    else if (r == d->id[IdSelectAll]) {
+        selectAll();
+#ifndef QT_NO_CLIPBOARD
+        // if the clipboard support selections, put the newly selected text into
+        // the clipboard
+        if (QApplication::clipboard()->supportsSelection()) {
+            d->clipboard_mode = QClipboard::Selection;
+
+            // don't listen to selection changes
+            disconnect(QApplication::clipboard(), SIGNAL(selectionChanged()), this, 0);
+            copy();
+            // listen to selection changes
+            connect(QApplication::clipboard(), SIGNAL(selectionChanged()),
+                     this, SLOT(clipboardChanged()));
+
+            d->clipboard_mode = QClipboard::Clipboard;
+        }
+#endif
+    } 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 Q3TextEdit::autoScrollTimerDone()
+{
+    if (mousePressed)
+        handleMouseMove( viewportToContents(viewport()->mapFromGlobal(QCursor::pos()) ));
+}
+
+void Q3TextEdit::handleMouseMove(const QPoint& pos)
+{
+    if (!mousePressed)
+        return;
+
+    if ((!scrollTimer->isActive() && pos.y() < contentsY()) || pos.y() > contentsY() + visibleHeight())
+        scrollTimer->start(100, false);
+    else if (scrollTimer->isActive() && pos.y() >= contentsY() && pos.y() <= contentsY() + visibleHeight())
+        scrollTimer->stop();
+
+    drawCursor(false);
+    Q3TextCursor oldCursor = *cursor;
+
+    placeCursor(pos);
+
+    if (inDoubleClick) {
+        Q3TextCursor cl = *cursor;
+        cl.gotoPreviousWord();
+        Q3TextCursor cr = *cursor;
+        cr.gotoNextWord();
+
+        int diff = QABS(oldCursor.paragraph()->at(oldCursor.index())->x - mousePos.x());
+        int ldiff = QABS(cl.paragraph()->at(cl.index())->x - mousePos.x());
+        int rdiff = QABS(cr.paragraph()->at(cr.index())->x - mousePos.x());
+
+
+        if (cursor->paragraph()->lineStartOfChar(cursor->index()) !=
+             oldCursor.paragraph()->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(Q3TextDocument::Standard)) {
+        redraw = doc->setSelectionEnd(Q3TextDocument::Standard, *cursor) || redraw;
+    }
+
+    if (!redraw) {
+        drawCursor(true);
+    } else {
+        repaintChanged();
+        drawCursor(true);
+    }
+
+    if (currentFormat && currentFormat->key() != cursor->paragraph()->at(cursor->index())->format()->key()) {
+        currentFormat->removeRef();
+        currentFormat = doc->formatCollection()->format(cursor->paragraph()->at(cursor->index())->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->paragraph()->alignment()) {
+        currentAlignment = cursor->paragraph()->alignment();
+        block_set_alignment = true;
+        emit currentAlignmentChanged(currentAlignment);
+        block_set_alignment = false;
+    }
+}
+
+/*! \internal */
+
+void Q3TextEdit::placeCursor(const QPoint &pos, Q3TextCursor *c, bool link)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return;
+#endif
+    if (!c)
+        c = cursor;
+
+    if(c == cursor)
+        resetInputContext();
+    c->restoreState();
+    Q3TextParagraph *s = doc->firstParagraph();
+    c->place(pos, s, link);
+}
+
+
+QVariant Q3TextEdit::inputMethodQuery(Qt::InputMethodQuery query) const
+{
+    Q3TextCursor c(*cursor);
+
+    switch(query) {
+    case Qt::ImMicroFocus: {
+        int h = c.paragraph()->lineHeightOfChar(cursor->index());
+        return QRect(c.x() - contentsX() + frameWidth(),
+                     c.y() + cursor->paragraph()->rect().y() - contentsY() + frameWidth(), 1, h);
+    }
+    case Qt::ImFont:
+            return c.paragraph()->at(c.index())->format()->font();
+    default:
+    // ##### fix the others!
+        return QWidget::inputMethodQuery(query);
+    }
+}
+
+
+
+void Q3TextEdit::formatMore()
+{
+    if (!lastFormatted)
+        return;
+
+    int bottom = contentsHeight();
+    int lastTop = -1;
+    int lastBottom = -1;
+    int to = 20;
+    bool firstVisible = false;
+    QRect cr(contentsX(), contentsY(), visibleWidth(), visibleHeight());
+    for (int i = 0; lastFormatted &&
+          (i < to || (firstVisible && lastTop < contentsY()+height()));
+          i++) {
+        lastFormatted->format();
+        lastTop = lastFormatted->rect().top();
+        lastBottom = lastFormatted->rect().bottom();
+        if (i == 0)
+            firstVisible = lastBottom < cr.bottom();
+        bottom = qMax(bottom, lastBottom);
+        lastFormatted = lastFormatted->next();
+    }
+
+    if (bottom > contentsHeight()) {
+        resizeContents(contentsWidth(), qMax(doc->height(), bottom));
+    } else if (!lastFormatted && lastBottom < contentsHeight()) {
+        resizeContents(contentsWidth(), qMax(doc->height(), lastBottom));
+        if (contentsHeight() < visibleHeight())
+            updateContents(0, contentsHeight(), visibleWidth(),
+                            visibleHeight() - contentsHeight());
+    }
+
+    if (lastFormatted)
+        formatTimer->start(interval, true);
+    else
+        interval = qMax(0, interval);
+}
+
+void Q3TextEdit::doResize()
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (!d->optimMode)
+#endif
+    {
+        if (wrapMode == FixedPixelWidth)
+            return;
+        doc->setMinimumWidth(-1);
+        resizeContents(0, 0);
+        doc->setWidth(visibleWidth());
+        doc->invalidate();
+        lastFormatted = doc->firstParagraph();
+        interval = 0;
+        formatMore();
+    }
+    repaintContents();
+}
+
+/*! \internal */
+
+void Q3TextEdit::doChangeInterval()
+{
+    interval = 0;
+}
+
+/*!
+    \reimp
+*/
+
+bool Q3TextEdit::eventFilter(QObject *o, QEvent *e)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (!d->optimMode && (o == this || o == viewport())) {
+#else
+    if (o == this || o == viewport()) {
+#endif
+        if (d->cursorBlinkActive && e->type() == QEvent::FocusIn) {
+            if (QApplication::cursorFlashTime() > 0)
+                blinkTimer->start(QApplication::cursorFlashTime() / 2);
+            drawCursor(true);
+        } else if (e->type() == QEvent::FocusOut) {
+            blinkTimer->stop();
+            drawCursor(false);
+        }
+    }
+
+    if (o == this && e->type() == QEvent::PaletteChange) {
+        QColor old(viewport()->palette().color(QPalette::Text));
+        if (old != palette().color(QPalette::Text)) {
+            QColor c(palette().color(QPalette::Text));
+            doc->setMinimumWidth(-1);
+            doc->setDefaultFormat(doc->formatCollection()->defaultFormat()->font(), c);
+            lastFormatted = doc->firstParagraph();
+            formatMore();
+            repaintChanged();
+        }
+    }
+
+    return Q3ScrollView::eventFilter(o, e);
+}
+
+/*!
+    Inserts the given \a text. If \a indent is true the paragraph that
+    contains the text is reindented; if \a checkNewLine is true the \a
+    text is checked for newlines and relaid out. If \a removeSelected
+    is true and there is a selection, the insertion replaces the
+    selected text.
+ */
+void Q3TextEdit::insert(const QString &text, bool indent,
+                        bool checkNewLine, bool removeSelected)
+{
+    uint f = 0;
+    if (indent)
+        f |= RedoIndentation;
+    if (checkNewLine)
+        f |= CheckNewLines;
+    if (removeSelected)
+        f |= RemoveSelected;
+    insert(text, f);
+}
+
+/*!
+    Inserts \a text at the current cursor position.
+
+    The \a insertionFlags define how the text is inserted. If \c
+    RedoIndentation is set, the paragraph is re-indented. If \c
+    CheckNewLines is set, newline characters in \a text result in hard
+    line breaks (i.e. new paragraphs). If \c checkNewLine is not set,
+    the behavior of the editor is undefined if the \a text contains
+    newlines. (It is not possible to change Q3TextEdit's newline handling
+    behavior, but you can use QString::replace() to preprocess text
+    before inserting it.) If \c RemoveSelected is set, any selected
+    text (in selection 0) is removed before the text is inserted.
+
+    The default flags are \c CheckNewLines | \c RemoveSelected.
+
+    If the widget is in Qt::LogText mode this function will do nothing.
+
+    \sa paste() pasteSubType()
+*/
+
+
+void Q3TextEdit::insert(const QString &text, uint insertionFlags)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return;
+#endif
+
+    if (cursor->nestedDepth() != 0) // #### for 3.0, disable editing of tables as this is not advanced enough
+        return;
+
+    bool indent = insertionFlags & RedoIndentation;
+    bool checkNewLine = insertionFlags & CheckNewLines;
+    bool removeSelected = insertionFlags & RemoveSelected;
+    QString txt(text);
+    drawCursor(false);
+    if (!isReadOnly() && doc->hasSelection(Q3TextDocument::Standard) && removeSelected)
+        removeSelectedText();
+    Q3TextCursor c2 = *cursor;
+    int oldLen = 0;
+
+    if ( undoEnabled && !isReadOnly() && undoRedoInfo.type != UndoRedoInfo::IME ) {
+        checkUndoRedoInfo(UndoRedoInfo::Insert);
+
+        // If we are inserting at the end of the previous insertion, we keep this in
+        // the same undo/redo command. Otherwise, we separate them in two different commands.
+        if (undoRedoInfo.valid() && undoRedoInfo.index + undoRedoInfo.d->text.length() != cursor->index()) {
+            clearUndoRedo();
+            undoRedoInfo.type = UndoRedoInfo::Insert;
+        }
+
+        if (!undoRedoInfo.valid()) {
+            undoRedoInfo.id = cursor->paragraph()->paragId();
+            undoRedoInfo.index = cursor->index();
+            undoRedoInfo.d->text.clear();
+        }
+        oldLen = undoRedoInfo.d->text.length();
+    }
+
+    lastFormatted = checkNewLine && cursor->paragraph()->prev() ?
+                    cursor->paragraph()->prev() : cursor->paragraph();
+    Q3TextCursor oldCursor = *cursor;
+    cursor->insert(txt, checkNewLine);
+    if (doc->useFormatCollection() && !doc->preProcessor()) {
+        doc->setSelectionStart(Q3TextDocument::Temp, oldCursor);
+        doc->setSelectionEnd(Q3TextDocument::Temp, *cursor);
+        doc->setFormat(Q3TextDocument::Temp, currentFormat, Q3TextFormat::Format);
+        doc->removeSelection(Q3TextDocument::Temp);
+    }
+
+    if (indent && (txt == QString(QLatin1Char('{')) || txt == QString(QLatin1Char('}')) || txt == QString(QLatin1Char(':')) || txt == QString(QLatin1Char('#'))))
+        cursor->indent();
+    formatMore();
+    repaintChanged();
+    ensureCursorVisible();
+    drawCursor(true);
+
+    if ( undoEnabled && !isReadOnly() && undoRedoInfo.type != UndoRedoInfo::IME ) {
+        undoRedoInfo.d->text += txt;
+        if (!doc->preProcessor()) {
+            for (int i = 0; i < (int)txt.length(); ++i) {
+                if (txt[i] != QLatin1Char('\n') && c2.paragraph()->at(c2.index())->format()) {
+                    c2.paragraph()->at(c2.index())->format()->addRef();
+                    undoRedoInfo.d->text.
+                        setFormat(oldLen + i,
+                                   c2.paragraph()->at(c2.index())->format(), true);
+                }
+                c2.gotoNextLetter();
+            }
+        }
+    }
+
+    if (!removeSelected) {
+        doc->setSelectionStart(Q3TextDocument::Standard, oldCursor);
+        doc->setSelectionEnd(Q3TextDocument::Standard, *cursor);
+        repaintChanged();
+    }
+
+    setModified();
+    emit textChanged();
+}
+
+/*!
+    Inserts \a text in the paragraph \a para at position \a index.
+*/
+
+void Q3TextEdit::insertAt(const QString &text, int para, int index)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimInsert(text, para, index);
+        return;
+    }
+#endif
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return;
+    removeSelection(Q3TextDocument::Standard);
+    Q3TextCursor tmp = *cursor;
+    cursor->setParagraph(p);
+    cursor->setIndex(index);
+    insert(text, false, true, false);
+    *cursor = tmp;
+    removeSelection(Q3TextDocument::Standard);
+}
+
+/*!
+    Inserts \a text as a new paragraph at position \a para. If \a para
+    is -1, the text is appended. Use append() if the append operation
+    is performance critical.
+*/
+
+void Q3TextEdit::insertParagraph(const QString &text, int para)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimInsert(text + QLatin1Char('\n'), para, 0);
+        return;
+    }
+#endif
+    for (int i = 0; i < (int)doc->numSelections(); ++i)
+        doc->removeSelection(i);
+
+    Q3TextParagraph *p = doc->paragAt(para);
+
+    bool append = !p;
+    if (!p)
+        p = doc->lastParagraph();
+
+    Q3TextCursor old = *cursor;
+    drawCursor(false);
+
+    cursor->setParagraph(p);
+    cursor->setIndex(0);
+    clearUndoRedo();
+    qtextedit_ignore_readonly = true;
+    if (append && cursor->paragraph()->length() > 1) {
+        cursor->setIndex(cursor->paragraph()->length() - 1);
+        doKeyboardAction(ActionReturn);
+    }
+    insert(text, false, true, true);
+    doKeyboardAction(ActionReturn);
+    qtextedit_ignore_readonly = false;
+
+    drawCursor(false);
+    *cursor = old;
+    drawCursor(true);
+
+    repaintChanged();
+}
+
+/*!
+    Removes the paragraph \a para.
+*/
+
+void Q3TextEdit::removeParagraph(int para)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return;
+#endif
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return;
+
+    for (int i = 0; i < doc->numSelections(); ++i)
+        doc->removeSelection(i);
+
+    Q3TextCursor start(doc);
+    Q3TextCursor end(doc);
+    start.setParagraph(p);
+    start.setIndex(0);
+    end.setParagraph(p);
+    end.setIndex(p->length() - 1);
+
+    if (!(p == doc->firstParagraph() && p == doc->lastParagraph())) {
+        if (p->next()) {
+            end.setParagraph(p->next());
+            end.setIndex(0);
+        } else if (p->prev()) {
+            start.setParagraph(p->prev());
+            start.setIndex(p->prev()->length() - 1);
+        }
+    }
+
+    doc->setSelectionStart(Q3TextDocument::Temp, start);
+    doc->setSelectionEnd(Q3TextDocument::Temp, end);
+    removeSelectedText(Q3TextDocument::Temp);
+}
+
+/*!
+    Undoes the last operation.
+
+    If there is no operation to undo, i.e. there is no undo step in
+    the undo/redo history, nothing happens.
+
+    \sa undoAvailable() redo() undoDepth()
+*/
+
+void Q3TextEdit::undo()
+{
+    clearUndoRedo();
+    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() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+
+    clearUndoRedo();
+    drawCursor(false);
+    Q3TextCursor *c = doc->undo(cursor);
+    if (!c) {
+        drawCursor(true);
+        return;
+    }
+    lastFormatted = 0;
+    repaintChanged();
+    ensureCursorVisible();
+    drawCursor(true);
+    setModified();
+    // ### If we get back to a completely blank textedit, it
+    // is possible that cursor is invalid and further actions
+    // might not fix the problem, so reset the cursor here.
+    // This is copied from removeSeletedText(), it might be
+    // okay to just call that.
+    if (!cursor->isValid()) {
+        delete cursor;
+        cursor = new Q3TextCursor(doc);
+        drawCursor(true);
+        repaintContents();
+    }
+    emit undoAvailable(isUndoAvailable());
+    emit redoAvailable(isRedoAvailable());
+    emit textChanged();
+}
+
+/*!
+    Redoes the last operation.
+
+    If there is no operation to redo, i.e. there is no redo step in
+    the undo/redo history, nothing happens.
+
+    \sa redoAvailable() undo() undoDepth()
+*/
+
+void Q3TextEdit::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() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+
+    clearUndoRedo();
+    drawCursor(false);
+    Q3TextCursor *c = doc->redo(cursor);
+    if (!c) {
+        drawCursor(true);
+        return;
+    }
+    lastFormatted = 0;
+    ensureCursorVisible();
+    repaintChanged();
+    ensureCursorVisible();
+    drawCursor(true);
+    setModified();
+    emit undoAvailable(isUndoAvailable());
+    emit redoAvailable(isRedoAvailable());
+    emit textChanged();
+}
+
+/*!
+    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() Q3TextEdit::copy()
+*/
+
+void Q3TextEdit::paste()
+{
+#ifndef QT_NO_MIMECLIPBOARD
+    if (isReadOnly())
+        return;
+    QString subType = QLatin1String("plain");
+    if (textFormat() != Qt::PlainText) {
+        QMimeSource *m = QApplication::clipboard()->data(d->clipboard_mode);
+        if (!m)
+            return;
+        if (m->provides("application/x-qrichtext"))
+            subType = QLatin1String("x-qrichtext");
+    }
+
+    pasteSubType(subType.toLatin1());
+#endif
+}
+
+void Q3TextEdit::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 Q3TextEdit::repaintChanged()
+{
+    if (!updatesEnabled() || !viewport()->updatesEnabled())
+        return;
+
+    if (doc->firstParagraph())
+        lastFormatted = doc->firstParagraph();
+    updateContents(); // good enough until this class is rewritten
+}
+
+#ifndef QT_NO_MIME
+Q3TextDrag *Q3TextEdit::dragObject(QWidget *parent) const
+{
+    if (!doc->hasSelection(Q3TextDocument::Standard) ||
+         doc->selectedText(Q3TextDocument::Standard).isEmpty())
+        return 0;
+    if (textFormat() != Qt::RichText)
+        return new Q3TextDrag(doc->selectedText(Q3TextDocument::Standard), parent);
+    Q3RichTextDrag *drag = new Q3RichTextDrag(parent);
+    drag->setPlainText(doc->selectedText(Q3TextDocument::Standard));
+    drag->setRichText(doc->selectedText(Q3TextDocument::Standard, true));
+    return drag;
+}
+#endif
+
+/*!
+    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 Q3TextEdit::copy() paste() pasteSubType()
+*/
+
+void Q3TextEdit::cut()
+{
+    if (isReadOnly())
+        return;
+    normalCopy();
+    removeSelectedText();
+}
+
+void Q3TextEdit::normalCopy()
+{
+#ifndef QT_NO_MIME
+    Q3TextDrag *drag = dragObject();
+    if (!drag)
+        return;
+#ifndef QT_NO_MIMECLIPBOARD
+    QApplication::clipboard()->setData(drag, d->clipboard_mode);
+#endif // QT_NO_MIMECLIPBOARD
+#endif // QT_NO_MIME
+}
+
+/*!
+    Copies any selected text (from selection 0) to the clipboard.
+
+    \sa hasSelectedText() copyAvailable()
+*/
+
+void Q3TextEdit::copy()
+{
+#ifndef QT_NO_CLIPBOARD
+# ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode && optimHasSelection())
+        QApplication::clipboard()->setText(optimSelectedText(), d->clipboard_mode);
+    else
+        normalCopy();
+# else
+    normalCopy();
+# endif
+#endif
+}
+
+/*!
+    \internal
+
+    Re-indents the current paragraph.
+*/
+
+void Q3TextEdit::indent()
+{
+    if (isReadOnly())
+        return;
+
+    drawCursor(false);
+    if (!doc->hasSelection(Q3TextDocument::Standard))
+        cursor->indent();
+    else
+        doc->indentSelection(Q3TextDocument::Standard);
+    repaintChanged();
+    drawCursor(true);
+    setModified();
+    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 Q3TextEdit::focusNextPrevChild(bool n)
+{
+    if (!isReadOnly() || !linksEnabled())
+        return false;
+    bool b = doc->focusNextPrevChild(n);
+    repaintChanged();
+    if (b) {
+        Q3TextParagraph *p = doc->focusIndicator.parag;
+        int start = doc->focusIndicator.start;
+        int len = doc->focusIndicator.len;
+
+        int y = p->rect().y();
+        while (p
+               && len == 0
+               && p->at(start)->isCustom()
+               && p->at(start)->customItem()->isNested()) {
+
+            Q3TextTable *t = (Q3TextTable*)p->at(start)->customItem();
+            QList<Q3TextTableCell *> cells = t->tableCells();
+            for (int idx = 0; idx < cells.count(); ++idx) {
+                Q3TextTableCell *c = cells.at(idx);
+                Q3TextDocument *cellDoc = c->richText();
+                if ( cellDoc->hasFocusParagraph() ) {
+                    y += c->geometry().y() + c->verticalAlignmentOffset();
+
+                    p = cellDoc->focusIndicator.parag;
+                    start = cellDoc->focusIndicator.start;
+                    len = cellDoc->focusIndicator.len;
+                    if ( p )
+                        y += p->rect().y();
+
+                    break;
+                }
+            }
+        }
+        setContentsPos( contentsX(), QMIN( y, contentsHeight() - visibleHeight() ) );
+    }
+    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 Q3TextEdit::setFormat(Q3TextFormat *f, int flags)
+{
+    if (doc->hasSelection(Q3TextDocument::Standard)) {
+        drawCursor(false);
+        Q3TextCursor c1 = doc->selectionStartCursor(Q3TextDocument::Standard);
+        c1.restoreState();
+        Q3TextCursor c2 = doc->selectionEndCursor(Q3TextDocument::Standard);
+        c2.restoreState();
+        if (undoEnabled) {
+            clearUndoRedo();
+            undoRedoInfo.type = UndoRedoInfo::Format;
+            undoRedoInfo.id = c1.paragraph()->paragId();
+            undoRedoInfo.index = c1.index();
+            undoRedoInfo.eid = c2.paragraph()->paragId();
+            undoRedoInfo.eindex = c2.index();
+            readFormats(c1, c2, undoRedoInfo.d->text);
+            undoRedoInfo.format = f;
+            undoRedoInfo.flags = flags;
+            clearUndoRedo();
+        }
+        doc->setFormat(Q3TextDocument::Standard, f, flags);
+        repaintChanged();
+        formatMore();
+        drawCursor(true);
+        setModified();
+        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->paragraph()->length() - 1) {
+            currentFormat->addRef();
+            cursor->paragraph()->string()->setFormat(cursor->index(), currentFormat, true);
+            if (cursor->paragraph()->length() == 1) {
+                cursor->paragraph()->invalidate(0);
+                cursor->paragraph()->format();
+                repaintChanged();
+            }
+        }
+    }
+}
+
+/*! \internal
+  \warning In Qt 3.1 we will provide a cleaer API for the
+  functionality which is provided by this function and in Qt 4.0 this
+  function will go away.
+
+  Sets the paragraph style of the current paragraph
+  to \a dm. If \a dm is Q3StyleSheetItem::DisplayListItem, the
+  type of the list item is set to \a listStyle.
+
+  \sa setAlignment()
+*/
+
+void Q3TextEdit::setParagType(Q3StyleSheetItem::DisplayMode dm,
+                              Q3StyleSheetItem::ListStyle listStyle)
+{
+    if (isReadOnly())
+        return;
+
+    drawCursor(false);
+    Q3TextParagraph *start = cursor->paragraph();
+    Q3TextParagraph *end = start;
+    if (doc->hasSelection(Q3TextDocument::Standard)) {
+        start = doc->selectionStartCursor(Q3TextDocument::Standard).topParagraph();
+        end = doc->selectionEndCursor(Q3TextDocument::Standard).topParagraph();
+        if (end->paragId() < start->paragId())
+            return; // do not trust our selections
+    }
+
+    clearUndoRedo();
+    undoRedoInfo.type = UndoRedoInfo::Style;
+    undoRedoInfo.id = start->paragId();
+    undoRedoInfo.eid = end->paragId();
+    undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
+
+    while (start != end->next()) {
+        start->setListStyle(listStyle);
+        if (dm == Q3StyleSheetItem::DisplayListItem) {
+            start->setListItem(true);
+            if(start->listDepth() == 0)
+                start->setListDepth(1);
+        } else if (start->isListItem()) {
+            start->setListItem(false);
+            start->setListDepth(qMax(start->listDepth()-1, 0));
+        }
+        start = start->next();
+    }
+
+    clearUndoRedo();
+    repaintChanged();
+    formatMore();
+    drawCursor(true);
+    setModified();
+    emit textChanged();
+}
+
+/*!
+    Sets the alignment of the current paragraph to \a a. Valid
+    alignments are Qt::AlignLeft, Qt::AlignRight,
+    Qt::AlignJustify and Qt::AlignCenter (which centers
+    horizontally).
+*/
+
+void Q3TextEdit::setAlignment(int a)
+{
+    if (isReadOnly() || block_set_alignment)
+        return;
+
+    drawCursor(false);
+    Q3TextParagraph *start = cursor->paragraph();
+    Q3TextParagraph *end = start;
+    if (doc->hasSelection(Q3TextDocument::Standard)) {
+        start = doc->selectionStartCursor(Q3TextDocument::Standard).topParagraph();
+        end = doc->selectionEndCursor(Q3TextDocument::Standard).topParagraph();
+        if (end->paragId() < start->paragId())
+            return; // do not trust our selections
+    }
+
+    clearUndoRedo();
+    undoRedoInfo.type = UndoRedoInfo::Style;
+    undoRedoInfo.id = start->paragId();
+    undoRedoInfo.eid = end->paragId();
+    undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
+
+    while (start != end->next()) {
+        start->setAlignment(a);
+        start = start->next();
+    }
+
+    clearUndoRedo();
+    repaintChanged();
+    formatMore();
+    drawCursor(true);
+    if (currentAlignment != a) {
+        currentAlignment = a;
+        emit currentAlignmentChanged(currentAlignment);
+    }
+    setModified();
+    emit textChanged();
+}
+
+void Q3TextEdit::updateCurrentFormat()
+{
+    int i = cursor->index();
+    if (i > 0)
+        --i;
+    if (doc->useFormatCollection() &&
+         (!currentFormat || currentFormat->key() != cursor->paragraph()->at(i)->format()->key())) {
+        if (currentFormat)
+            currentFormat->removeRef();
+        currentFormat = doc->formatCollection()->format(cursor->paragraph()->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->paragraph()->alignment()) {
+        currentAlignment = cursor->paragraph()->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 Q3TextEdit::setItalic(bool b)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setItalic(b);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Italic);
+}
+
+/*!
+    If \a b is true sets the current format to bold; otherwise sets
+    the current format to non-bold.
+
+    \sa bold()
+*/
+
+void Q3TextEdit::setBold(bool b)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setBold(b);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Bold);
+}
+
+/*!
+    If \a b is true sets the current format to underline; otherwise
+    sets the current format to non-underline.
+
+    \sa underline()
+*/
+
+void Q3TextEdit::setUnderline(bool b)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setUnderline(b);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Underline);
+}
+
+/*!
+    Sets the font family of the current format to \a fontFamily.
+
+    \sa family() setCurrentFont()
+*/
+
+void Q3TextEdit::setFamily(const QString &fontFamily)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setFamily(fontFamily);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Family);
+}
+
+/*!
+    Sets the point size of the current format to \a s.
+
+    Note that if \a s is zero or negative, the behavior of this
+    function is not defined.
+
+    \sa pointSize() setCurrentFont() setFamily()
+*/
+
+void Q3TextEdit::setPointSize(int s)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setPointSize(s);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Size);
+}
+
+/*!
+    Sets the color of the current format, i.e. of the text, to \a c.
+
+    \sa color() setPaper()
+*/
+
+void Q3TextEdit::setColor(const QColor &c)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setColor(c);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Color);
+}
+
+/*!
+    Sets the vertical alignment of the current format, i.e. of the
+    text, to \a a.
+
+    \sa color() setPaper()
+*/
+
+void Q3TextEdit::setVerticalAlignment(Q3TextEdit::VerticalAlignment a)
+{
+    Q3TextFormat f(*currentFormat);
+    f.setVAlign((Q3TextFormat::VerticalAlignment)a);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::VAlign);
+}
+
+void Q3TextEdit::setFontInternal(const QFont &f_)
+{
+    QFont font = f_;
+    if (font.kerning())
+        font.setKerning(false);
+    Q3TextFormat f(*currentFormat);
+    f.setFont(font);
+    Q3TextFormat *f2 = doc->formatCollection()->format(&f);
+    setFormat(f2, Q3TextFormat::Font);
+}
+
+
+QString Q3TextEdit::text() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return optimText();
+#endif
+
+    Q3TextParagraph *p = doc->firstParagraph();
+    if (!p || (!p->next() && p->length() <= 1))
+        return QString::fromLatin1("");
+
+    if (isReadOnly())
+        return doc->originalText();
+    return doc->text();
+}
+
+/*!
+    \overload
+
+    Returns the text of paragraph \a para.
+
+    If textFormat() is Qt::RichText the text will contain HTML
+    formatting tags.
+*/
+
+QString Q3TextEdit::text(int para) const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode && (d->od->numLines >= para)) {
+        QString paraStr = d->od->lines[LOGOFFSET(para)];
+        if (paraStr.isEmpty())
+            paraStr = QLatin1Char('\n');
+        return paraStr;
+    } else
+#endif
+    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 Qt::AutoText,
+    i.e. the text edit auto-detects the format from \a text.
+
+    For rich text the rendering style and available tags are defined
+    by a styleSheet(); see Q3StyleSheet for details.
+
+    The optional \a context is a path which the text edit's
+    Q3MimeSourceFactory uses to resolve the locations of files and
+    images. (See \l{Q3TextEdit::Q3TextEdit()}.) It is passed to the text
+    edit's Q3MimeSourceFactory when quering data.
+
+    Note that the undo/redo history is cleared by this function.
+
+    \sa text(), setTextFormat()
+*/
+
+void Q3TextEdit::setText(const QString &text, const QString &context)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimSetText(text);
+        return;
+    }
+#endif
+    if (!isModified() && isReadOnly() &&
+         this->context() == context && this->text() == text)
+        return;
+
+    emit undoAvailable(false);
+    emit redoAvailable(false);
+    undoRedoInfo.clear();
+    doc->commands()->clear();
+
+    lastFormatted = 0;
+    int oldCursorPos = cursor->index();
+    int oldCursorPar = cursor->paragraph()->paragId();
+    cursor->restoreState();
+    delete cursor;
+    doc->setText(text, context);
+
+    if (wrapMode == FixedPixelWidth) {
+        resizeContents(wrapWidth, 0);
+        doc->setWidth(wrapWidth);
+        doc->setMinimumWidth(wrapWidth);
+    } else {
+        doc->setMinimumWidth(-1);
+        resizeContents(0, 0);
+    }
+
+    lastFormatted = doc->firstParagraph();
+    cursor = new Q3TextCursor(doc);
+    updateContents();
+
+    if (isModified())
+        setModified(false);
+    emit textChanged();
+    if (cursor->index() != oldCursorPos || cursor->paragraph()->paragId() != oldCursorPar) {
+        emit cursorPositionChanged(cursor);
+        emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+    }
+    formatMore();
+    updateCurrentFormat();
+    d->scrollToAnchor.clear();
+}
+
+/*!
+    \property Q3TextEdit::text
+    \brief the text edit's text
+
+    There is no default text.
+
+    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 Qt::AutoText,
+    i.e. the text edit auto-detects the format of the text.
+
+    For richtext, calling text() on an editable Q3TextEdit will cause
+    the text to be regenerated from the textedit. This may mean that
+    the QString returned may not be exactly the same as the one that
+    was set.
+
+    \sa textFormat
+*/
+
+
+/*!
+    \property Q3TextEdit::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.
+
+    This property's default is false.
+*/
+
+/*!
+    Finds the next occurrence of the string, \a expr. Returns true if
+    \a expr was found; otherwise returns false.
+
+    If \a para and \a index are both 0 the search begins from the
+    current cursor position. If \a para and \a index are both not 0,
+    the search begins from the \c{*}\a{index} character position in the
+    \c{*}\a{para} paragraph.
+
+    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. If \a index and \a
+    para are not 0, the number of the paragraph in which the first
+    character of the match was found is put into \c{*}\a{para}, and the
+    index position of that character within the paragraph is put into
+    \c{*}\a{index}.
+
+    If \a expr is not found the function returns false. If \a index
+    and \a para are not 0 and \a expr is not found, \c{*}\a{index}
+    and \c{*}\a{para} are undefined.
+
+    Please note that this function will make the next occurrence of
+    the string (if found) the current selection, and will thus
+    modify the cursor position.
+
+    Using the \a para and \a index parameters will not work correctly
+    in case the document contains tables.
+*/
+
+bool Q3TextEdit::find(const QString &expr, bool cs, bool wo, bool forward,
+                      int *para, int *index)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return optimFind(expr, cs, wo, forward, para, index);
+#endif
+    drawCursor(false);
+#ifndef QT_NO_CURSOR
+    viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+    Q3TextCursor findcur = *cursor;
+    if (para && index) {
+        if (doc->paragAt(*para))
+            findcur.gotoPosition(doc->paragAt(*para), *index);
+        else
+            findcur.gotoEnd();
+    } else if (doc->hasSelection(Q3TextDocument::Standard)){
+        // maks sure we do not find the same selection again
+        if (forward)
+            findcur.gotoNextLetter();
+        else
+            findcur.gotoPreviousLetter();
+    } else if (!forward && findcur.index() == 0 && findcur.paragraph() == findcur.topParagraph()) {
+        findcur.gotoEnd();
+    }
+    removeSelection(Q3TextDocument::Standard);
+    bool found = doc->find(findcur, expr, cs, wo, forward);
+    if (found) {
+        if (para)
+            *para = findcur.paragraph()->paragId();
+        if (index)
+            *index = findcur.index();
+        *cursor = findcur;
+        repaintChanged();
+        ensureCursorVisible();
+    }
+    drawCursor(true);
+    if (found) {
+        emit cursorPositionChanged(cursor);
+        emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+    }
+    return found;
+}
+
+void Q3TextEdit::blinkCursor()
+{
+    bool cv = cursorVisible;
+    blinkCursorVisible = !blinkCursorVisible;
+    drawCursor(blinkCursorVisible);
+    cursorVisible = cv;
+}
+
+/*!
+    Sets the cursor to position \a index in paragraph \a para.
+
+    \sa getCursorPosition()
+*/
+
+void Q3TextEdit::setCursorPosition(int para, int index)
+{
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return;
+
+    if (index > p->length() - 1)
+        index = p->length() - 1;
+
+    drawCursor(false);
+    cursor->setParagraph(p);
+    cursor->setIndex(index);
+    ensureCursorVisible();
+    drawCursor(true);
+    updateCurrentFormat();
+    emit cursorPositionChanged(cursor);
+    emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+}
+
+/*!
+    This function sets the \c{*}\a{para} and \c{*}\a{index} parameters to the
+    current cursor position. \a para and \a index must not be 0.
+
+    \sa setCursorPosition()
+*/
+
+void Q3TextEdit::getCursorPosition(int *para, int *index) const
+{
+    if (!para || !index)
+        return;
+    *para = cursor->paragraph()->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.
+
+    Any existing selections which have a different id (\a selNum) are
+    left alone, but if an existing selection has the same id as \a
+    selNum it is removed and replaced by this selection.
+
+    Uses the selection settings of selection \a selNum. If \a selNum
+    is 0, this is the default selection.
+
+    The cursor is moved to the end of the selection if \a selNum is 0,
+    otherwise the cursor position remains unchanged.
+
+    \sa getSelection() selectedText
+*/
+
+void Q3TextEdit::setSelection(int paraFrom, int indexFrom,
+                              int paraTo, int indexTo, int selNum)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimSetSelection(paraFrom, indexFrom, paraTo, indexTo);
+        repaintContents();
+        return;
+    }
+#endif
+    if (doc->hasSelection(selNum)) {
+        doc->removeSelection(selNum);
+        repaintChanged();
+    }
+    if (selNum > doc->numSelections() - 1)
+        doc->addSelection(selNum);
+    Q3TextParagraph *p1 = doc->paragAt(paraFrom);
+    if (!p1)
+        return;
+    Q3TextParagraph *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);
+    Q3TextCursor c = *cursor;
+    Q3TextCursor oldCursor = *cursor;
+    c.setParagraph(p1);
+    c.setIndex(indexFrom);
+    cursor->setParagraph(p2);
+    cursor->setIndex(indexTo);
+    doc->setSelectionStart(selNum, c);
+    doc->setSelectionEnd(selNum, *cursor);
+    repaintChanged();
+    ensureCursorVisible();
+    if (selNum != Q3TextDocument::Standard)
+        *cursor = oldCursor;
+    drawCursor(true);
+}
+
+/*!
+    If there is a selection, \c{*}\a{paraFrom} is set to the number of the
+    paragraph in which the selection begins and \c{*}\a{paraTo} is set to
+    the number of the paragraph in which the selection ends. (They
+    could be the same.) \c{*}\a{indexFrom} is set to the index at which the
+    selection begins within \c{*}\a{paraFrom}, and \c{*}\a{indexTo} is set to
+    the index at which the selection ends within \c{*}\a{paraTo}.
+
+    If there is no selection, \c{*}\a{paraFrom}, \c{*}\a{indexFrom},
+    \c{*}\a{paraTo} and \c{*}\a{indexTo} are all set to -1.
+
+    If \a paraFrom, \a indexFrom, \a paraTo or \a indexTo is 0 this
+    function does nothing.
+
+    The \a selNum is the number of the selection (multiple selections
+    are supported). It defaults to 0 (the default selection).
+
+    \sa setSelection() selectedText
+*/
+
+void Q3TextEdit::getSelection(int *paraFrom, int *indexFrom,
+                              int *paraTo, int *indexTo, int selNum) const
+{
+    if (!paraFrom || !paraTo || !indexFrom || !indexTo)
+        return;
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        *paraFrom = d->od->selStart.line;
+        *paraTo = d->od->selEnd.line;
+        *indexFrom = d->od->selStart.index;
+        *indexTo = d->od->selEnd.index;
+        return;
+    }
+#endif
+    if (!doc->hasSelection(selNum)) {
+        *paraFrom = -1;
+        *indexFrom = -1;
+        *paraTo = -1;
+        *indexTo = -1;
+        return;
+    }
+
+    doc->selectionStart(selNum, *paraFrom, *indexFrom);
+    doc->selectionEnd(selNum, *paraTo, *indexTo);
+}
+
+/*!
+    \property Q3TextEdit::textFormat
+    \brief the text format: rich text, plain text, log text or auto text.
+
+    The text format is one of the following:
+    \list
+    \i Qt::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 Qt::RichText - rich text rendering. The available styles are
+    defined in the default stylesheet Q3StyleSheet::defaultSheet().
+    \i Qt::LogText -  optimized mode for very large texts. Supports a very
+    limited set of formatting tags (color, bold, underline and italic
+    settings).
+    \i Qt::AutoText - this is the default. The text edit autodetects which
+    rendering style is best, Qt::PlainText or Qt::RichText. This is done
+    by using the Q3StyleSheet::mightBeRichText() function.
+    \endlist
+*/
+
+void Q3TextEdit::setTextFormat(Qt::TextFormat format)
+{
+    doc->setTextFormat(format);
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    checkOptimMode();
+#endif
+}
+
+Qt::TextFormat Q3TextEdit::textFormat() const
+{
+    return doc->textFormat();
+}
+
+/*!
+    Returns the number of paragraphs in the text; an empty textedit is always
+    considered to have one paragraph, so 1 is returned in this case.
+*/
+
+int Q3TextEdit::paragraphs() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        return d->od->numLines;
+    }
+#endif
+    return doc->lastParagraph()->paragId() + 1;
+}
+
+/*!
+    Returns the number of lines in paragraph \a para, or -1 if there
+    is no paragraph with index \a para.
+*/
+
+int Q3TextEdit::linesOfParagraph(int para) const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        if (d->od->numLines >= para)
+            return 1;
+        else
+            return -1;
+    }
+#endif
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return -1;
+    return p->lines();
+}
+
+/*!
+    Returns the length of the paragraph \a para (i.e. the number of
+    characters), or -1 if there is no paragraph with index \a para.
+
+    This function ignores newlines.
+*/
+
+int Q3TextEdit::paragraphLength(int para) const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        if (d->od->numLines >= para) {
+            if (d->od->lines[LOGOFFSET(para)].isEmpty()) // CR
+                return 1;
+            else
+                return d->od->lines[LOGOFFSET(para)].length();
+        }
+        return -1;
+    }
+#endif
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return -1;
+    return p->length() - 1;
+}
+
+/*!
+    Returns the number of lines in the text edit; this could be 0.
+
+    \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 Q3TextEdit::lines() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        return d->od->numLines;
+    }
+#endif
+    Q3TextParagraph *p = doc->firstParagraph();
+    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 Q3TextEdit::lineOfChar(int para, int index)
+{
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return -1;
+
+    int idx, line;
+    Q3TextStringChar *c = p->lineStartOfChar(index, &idx, &line);
+    if (!c)
+        return -1;
+
+    return line;
+}
+
+void Q3TextEdit::setModified(bool m)
+{
+    bool oldModified = modified;
+    modified = m;
+    if (modified && doc->oTextValid)
+        doc->invalidateOriginalText();
+    if (oldModified != modified)
+        emit modificationChanged(modified);
+}
+
+/*!
+    \property Q3TextEdit::modified
+    \brief whether the document has been modified by the user
+*/
+
+bool Q3TextEdit::isModified() const
+{
+    return modified;
+}
+
+void Q3TextEdit::setModified()
+{
+    if (!isModified())
+        setModified(true);
+}
+
+/*!
+    Returns true if the current format is italic; otherwise returns false.
+
+    \sa setItalic()
+*/
+
+bool Q3TextEdit::italic() const
+{
+    return currentFormat->font().italic();
+}
+
+/*!
+    Returns true if the current format is bold; otherwise returns false.
+
+    \sa setBold()
+*/
+
+bool Q3TextEdit::bold() const
+{
+    return currentFormat->font().bold();
+}
+
+/*!
+    Returns true if the current format is underlined; otherwise returns
+    false.
+
+    \sa setUnderline()
+*/
+
+bool Q3TextEdit::underline() const
+{
+    return currentFormat->font().underline();
+}
+
+/*!
+    Returns the font family of the current format.
+
+    \sa setFamily() setCurrentFont() setPointSize()
+*/
+
+QString Q3TextEdit::family() const
+{
+    return currentFormat->font().family();
+}
+
+/*!
+    Returns the point size of the font of the current format.
+
+    \sa setFamily() setCurrentFont() setPointSize()
+*/
+
+int Q3TextEdit::pointSize() const
+{
+    return currentFormat->font().pointSize();
+}
+
+/*!
+    Returns the color of the current format.
+
+    \sa setColor() setPaper()
+*/
+
+QColor Q3TextEdit::color() const
+{
+    return currentFormat->color();
+}
+
+/*!
+    Returns Q3ScrollView::font()
+
+    \warning In previous versions this function returned the font of
+    the current format. This lead to confusion. Please use
+    currentFont() instead.
+*/
+
+QFont Q3TextEdit::font() const
+{
+    return Q3ScrollView::font();
+}
+
+/*!
+    Returns the font of the current format.
+
+    \sa setCurrentFont() setFamily() setPointSize()
+*/
+
+QFont Q3TextEdit::currentFont() const
+{
+    return currentFormat->font();
+}
+
+
+/*!
+    Returns the alignment of the current paragraph.
+
+    \sa setAlignment()
+*/
+
+int Q3TextEdit::alignment() const
+{
+    return currentAlignment;
+}
+
+/*!
+    Returns the vertical alignment of the current format.
+
+    \sa setVerticalAlignment()
+*/
+
+Q3TextEdit::VerticalAlignment Q3TextEdit::verticalAlignment() const
+{
+    return (Q3TextEdit::VerticalAlignment) currentFormat->vAlign();
+}
+
+void Q3TextEdit::startDrag()
+{
+#ifndef QT_NO_DRAGANDDROP
+    mousePressed = false;
+    inDoubleClick = false;
+    Q3DragObject *drag = dragObject(viewport());
+    if (!drag)
+        return;
+    if (isReadOnly()) {
+        drag->dragCopy();
+    } else {
+        if (drag->drag() && Q3DragObject::target() != this && Q3DragObject::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 Q3TextEdit::selectAll(bool select)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        if (select)
+            optimSelectAll();
+        else
+            optimRemoveSelection();
+        return;
+    }
+#endif
+    if (!select)
+        doc->removeSelection(Q3TextDocument::Standard);
+    else
+        doc->selectAll(Q3TextDocument::Standard);
+    repaintChanged();
+    emit copyAvailable(doc->hasSelection(Q3TextDocument::Standard));
+    emit selectionChanged();
+#ifndef QT_NO_CURSOR
+    viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+}
+
+void Q3TextEdit::UndoRedoInfo::clear()
+{
+    if (valid()) {
+        if (type == Insert || type == Return)
+            doc->addCommand(new Q3TextInsertCommand(doc, id, index, d->text.rawData(), styleInformation));
+        else if (type == Format)
+            doc->addCommand(new Q3TextFormatCommand(doc, id, index, eid, eindex, d->text.rawData(), format, flags));
+        else if (type == Style)
+            doc->addCommand(new Q3TextStyleCommand(doc, id, eid, styleInformation));
+        else if (type != Invalid) {
+            doc->addCommand(new Q3TextDeleteCommand(doc, id, index, d->text.rawData(), styleInformation));
+        }
+    }
+    type = Invalid;
+    d->text.clear();
+    id = -1;
+    index = -1;
+    styleInformation = QByteArray();
+}
+
+
+/*!
+    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 Q3TextEdit::del()
+{
+    if (doc->hasSelection(Q3TextDocument::Standard)) {
+        removeSelectedText();
+        return;
+    }
+
+    doKeyboardAction(ActionDelete);
+}
+
+
+Q3TextEdit::UndoRedoInfo::UndoRedoInfo(Q3TextDocument *dc)
+    : type(Invalid), doc(dc)
+{
+    d = new QUndoRedoInfoPrivate;
+    d->text.clear();
+    id = -1;
+    index = -1;
+}
+
+Q3TextEdit::UndoRedoInfo::~UndoRedoInfo()
+{
+    delete d;
+}
+
+bool Q3TextEdit::UndoRedoInfo::valid() const
+{
+    return id >= 0 &&  type != Invalid;
+}
+
+/*!
+    \internal
+
+  Resets the current format to the default format.
+*/
+
+void Q3TextEdit::resetFormat()
+{
+    setAlignment(Qt::AlignAuto);
+    setParagType(Q3StyleSheetItem::DisplayBlock, Q3StyleSheetItem::ListDisc);
+    setFormat(doc->formatCollection()->defaultFormat(), Q3TextFormat::Format);
+}
+
+/*!
+    Returns the Q3StyleSheet which is being used by this text edit.
+
+    \sa setStyleSheet()
+*/
+
+Q3StyleSheet* Q3TextEdit::styleSheet() const
+{
+    return doc->styleSheet();
+}
+
+/*!
+    Sets the stylesheet to use with this text edit to \a styleSheet.
+    Changes will only take effect for new text added with setText() or
+    append().
+
+    \sa styleSheet()
+*/
+
+void Q3TextEdit::setStyleSheet(Q3StyleSheet* styleSheet)
+{
+    doc->setStyleSheet(styleSheet);
+}
+
+/*!
+    \property Q3TextEdit::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 Q3TextEdit::setPaper(const QBrush& pap)
+{
+    doc->setPaper(new QBrush(pap));
+    if ( pap.pixmap() )
+        viewport()->setBackgroundPixmap( *pap.pixmap() );
+    QPalette pal = palette();
+    pal.setColor(QPalette::Window, pap.color());
+    setPalette(pal);
+    pal = viewport()->palette();
+    pal.setColor(QPalette::Window, pap.color());
+    viewport()->setPalette(pal);
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    // force a repaint of the entire viewport - using updateContents()
+    // would clip the coords to the content size
+    if (d->optimMode)
+        repaintContents(contentsX(), contentsY(), viewport()->width(), viewport()->height());
+    else
+#endif
+        updateContents();
+}
+
+QBrush Q3TextEdit::paper() const
+{
+    if (doc->paper())
+        return *doc->paper();
+    return QBrush(palette().base());
+}
+
+/*!
+    \property Q3TextEdit::linkUnderline
+    \brief whether hypertext links will be underlined
+
+    If true (the default) hypertext links will be displayed
+    underlined. If false links will not be displayed underlined.
+*/
+
+void Q3TextEdit::setLinkUnderline(bool b)
+{
+    if (doc->underlineLinks() == b)
+        return;
+    doc->setUnderlineLinks(b);
+    repaintChanged();
+}
+
+bool Q3TextEdit::linkUnderline() const
+{
+    return doc->underlineLinks();
+}
+
+/*!
+    Sets the text edit's mimesource factory to \a factory. See
+    Q3MimeSourceFactory for further details.
+
+    \sa mimeSourceFactory()
+ */
+
+#ifndef QT_NO_MIME
+void Q3TextEdit::setMimeSourceFactory(Q3MimeSourceFactory* factory)
+{
+    doc->setMimeSourceFactory(factory);
+}
+
+/*!
+    Returns the Q3MimeSourceFactory which is being used by this text
+    edit.
+
+    \sa setMimeSourceFactory()
+*/
+
+Q3MimeSourceFactory* Q3TextEdit::mimeSourceFactory() const
+{
+    return doc->mimeSourceFactory();
+}
+#endif
+
+/*!
+    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 Q3TextEdit::heightForWidth(int w) const
+{
+    int oldw = doc->width();
+    doc->doLayout(0, w);
+    int h = doc->height();
+    doc->setWidth(oldw);
+    doc->invalidate();
+    ((Q3TextEdit*)this)->formatMore();
+    return h;
+}
+
+/*!
+    Appends a new paragraph with \a text to the end of the text edit. Note that
+    the undo/redo history is cleared by this function, and no undo
+    history is kept for appends which makes them faster than
+    insert()s. If you want to append text which is added to the
+    undo/redo history as well, use insertParagraph().
+*/
+
+void Q3TextEdit::append(const QString &text)
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimAppend(text);
+        return;
+    }
+#endif
+    // flush and clear the undo/redo stack if necessary
+    undoRedoInfo.clear();
+    doc->commands()->clear();
+
+    doc->removeSelection(Q3TextDocument::Standard);
+    Qt::TextFormat f = doc->textFormat();
+    if (f == Qt::AutoText) {
+        if (Q3StyleSheet::mightBeRichText(text))
+            f = Qt::RichText;
+        else
+            f = Qt::PlainText;
+    }
+
+    drawCursor(false);
+    Q3TextCursor oldc(*cursor);
+    ensureFormatted(doc->lastParagraph());
+    bool atBottom = contentsY() >= contentsHeight() - visibleHeight();
+    cursor->gotoEnd();
+    if (cursor->index() > 0)
+        cursor->splitAndInsertEmptyParagraph();
+    Q3TextCursor oldCursor2 = *cursor;
+
+    if (f == Qt::PlainText) {
+        cursor->insert(text, true);
+        if (doc->useFormatCollection() && !doc->preProcessor() &&
+            currentFormat != cursor->paragraph()->at( cursor->index() )->format()) {
+            doc->setSelectionStart( Q3TextDocument::Temp, oldCursor2 );
+            doc->setSelectionEnd( Q3TextDocument::Temp, *cursor );
+            doc->setFormat( Q3TextDocument::Temp, currentFormat, Q3TextFormat::Format );
+            doc->removeSelection( Q3TextDocument::Temp );
+        }
+    } else {
+        cursor->paragraph()->setListItem(false);
+        cursor->paragraph()->setListDepth(0);
+        if (cursor->paragraph()->prev())
+            cursor->paragraph()->prev()->invalidate(0); // vertical margins might have to change
+        doc->setRichTextInternal(text);
+    }
+    formatMore();
+    repaintChanged();
+    if (atBottom)
+        scrollToBottom();
+    *cursor = oldc;
+    if (!isReadOnly())
+        cursorVisible = true;
+    setModified();
+    emit textChanged();
+}
+
+/*!
+    \property Q3TextEdit::hasSelectedText
+    \brief whether some text is selected in selection 0
+*/
+
+bool Q3TextEdit::hasSelectedText() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return optimHasSelection();
+    else
+#endif
+        return doc->hasSelection(Q3TextDocument::Standard);
+}
+
+/*!
+    \property Q3TextEdit::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 Qt::PlainText if the textFormat() is
+    Qt::PlainText or Qt::AutoText, otherwise it is returned as HTML.
+
+    \sa hasSelectedText
+*/
+
+QString Q3TextEdit::selectedText() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return optimSelectedText();
+    else
+#endif
+        return doc->selectedText(Q3TextDocument::Standard, textFormat() == Qt::RichText);
+}
+
+bool Q3TextEdit::handleReadOnlyKeyEvent(QKeyEvent *e)
+{
+    switch(e->key()) {
+    case Qt::Key_Down:
+        setContentsPos(contentsX(), contentsY() + 10);
+        break;
+    case Qt::Key_Up:
+        setContentsPos(contentsX(), contentsY() - 10);
+        break;
+    case Qt::Key_Left:
+        setContentsPos(contentsX() - 10, contentsY());
+        break;
+    case Qt::Key_Right:
+        setContentsPos(contentsX() + 10, contentsY());
+        break;
+    case Qt::Key_PageUp:
+        setContentsPos(contentsX(), contentsY() - visibleHeight());
+        break;
+    case Qt::Key_PageDown:
+        setContentsPos(contentsX(), contentsY() + visibleHeight());
+        break;
+    case Qt::Key_Home:
+        setContentsPos(contentsX(), 0);
+        break;
+    case Qt::Key_End:
+        setContentsPos(contentsX(), contentsHeight() - visibleHeight());
+        break;
+    case Qt::Key_F16: // Copy key on Sun keyboards
+        copy();
+        break;
+#ifndef QT_NO_NETWORKPROTOCOL
+    case Qt::Key_Return:
+    case Qt::Key_Enter:
+    case Qt::Key_Space: {
+        if (!doc->focusIndicator.href.isEmpty()
+                || !doc->focusIndicator.name.isEmpty()) {
+            if (!doc->focusIndicator.href.isEmpty()) {
+                QUrl u = QUrl(doc->context()).resolved(doc->focusIndicator.href);
+                emitLinkClicked(u.toString(QUrl::None));
+            }
+            if (!doc->focusIndicator.name.isEmpty())
+                if (Q3TextBrowser *browser = qobject_cast<Q3TextBrowser*>(this))
+                    emit browser->anchorClicked(doc->focusIndicator.name, doc->focusIndicator.href);
+
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+        }
+    } break;
+#endif
+    default:
+        if (e->state() & Qt::ControlButton) {
+            switch (e->key()) {
+            case Qt::Key_C: case Qt::Key_F16: // Copy key on Sun keyboards
+                copy();
+                break;
+#ifdef Q_WS_WIN
+            case Qt::Key_Insert:
+                copy();
+                break;
+            case Qt::Key_A:
+                selectAll();
+                break;
+#endif
+            }
+
+        }
+        return false;
+    }
+    return true;
+}
+
+/*!
+    Returns the context of the text edit. The context is a path which
+    the text edit's Q3MimeSourceFactory uses to resolve the locations
+    of files and images.
+
+    \sa text
+*/
+
+QString Q3TextEdit::context() const
+{
+    return doc->context();
+}
+
+/*!
+    \property Q3TextEdit::documentTitle
+    \brief the title of the document parsed from the text.
+
+    For Qt::PlainText the title will be an empty string. For \c
+    Qt::RichText the title will be the text between the \c{<title>} tags,
+    if present, otherwise an empty string.
+*/
+
+QString Q3TextEdit::documentTitle() const
+{
+    return doc->attributes()[QLatin1String("title")];
+}
+
+void Q3TextEdit::makeParagVisible(Q3TextParagraph *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 Q3TextEdit::scrollToAnchor(const QString& name)
+{
+    if (!isVisible()) {
+        d->scrollToAnchor = name;
+        return;
+    }
+    if (name.isEmpty())
+        return;
+    sync();
+    Q3TextCursor cursor(doc);
+    Q3TextParagraph* last = doc->lastParagraph();
+    for (;;) {
+        Q3TextStringChar* c = cursor.paragraph()->at(cursor.index());
+        if(c->isAnchor()) {
+            QString a = c->anchorName();
+            if (a == name ||
+                 (a.contains(QLatin1Char('#')) && a.split(QLatin1Char('#')).contains(name))) {
+                setContentsPos(contentsX(), qMin(cursor.paragraph()->rect().top() + cursor.totalOffsetY(), contentsHeight() - visibleHeight()));
+                break;
+            }
+        }
+        if (cursor.paragraph() == last && cursor.atParagEnd() )
+            break;
+        cursor.gotoNextLetter();
+    }
+}
+
+/*!
+    Returns the text for the attribute \a attr (Qt::AnchorHref by
+    default) if there is an anchor at position \a pos (in contents
+    coordinates); otherwise returns an empty string.
+*/
+
+QString Q3TextEdit::anchorAt(const QPoint& pos, Qt::AnchorAttribute attr)
+{
+    Q3TextCursor c(doc);
+    placeCursor(pos, &c, true);
+    switch(attr) {
+        case Qt::AnchorName:
+            return c.paragraph()->at(c.index())->anchorName();
+        case Qt::AnchorHref:
+            return c.paragraph()->at(c.index())->anchorHref();
+    }
+    // incase the compiler is really dumb about determining if a function
+    // returns something :)
+    return QString();
+}
+
+void Q3TextEdit::documentWidthChanged(int w)
+{
+    resizeContents(qMax(visibleWidth(), w), contentsHeight());
+}
+
+/*! \internal
+
+  This function does nothing
+*/
+
+void Q3TextEdit::updateStyles()
+{
+}
+
+void Q3TextEdit::setDocument(Q3TextDocument *dc)
+{
+    if (dc == 0) {
+        qWarning("Q3TextEdit::setDocument() called with null Q3TextDocument pointer");
+        return;
+    }
+    if (dc == doc)
+        return;
+    doc = dc;
+    delete cursor;
+    cursor = new Q3TextCursor(doc);
+    clearUndoRedo();
+    undoRedoInfo.doc = doc;
+    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() Q3TextEdit::copy()
+*/
+
+void Q3TextEdit::pasteSubType(const QByteArray &subtype)
+{
+#ifndef QT_NO_MIMECLIPBOARD
+    QMimeSource *m = QApplication::clipboard()->data(d->clipboard_mode);
+    pasteSubType(subtype, m);
+#endif
+}
+
+/*! \internal */
+
+void Q3TextEdit::pasteSubType(const QByteArray& subtype, QMimeSource *m)
+{
+#ifndef QT_NO_MIME
+    QByteArray st = subtype;
+
+    if (subtype != "x-qrichtext")
+        st.prepend("text/");
+    else
+        st.prepend("application/");
+    if (!m)
+        return;
+    if (doc->hasSelection(Q3TextDocument::Standard))
+        removeSelectedText();
+    if (!Q3RichTextDrag::canDecode(m))
+        return;
+    QString t;
+    if (!Q3RichTextDrag::decode(m, t, QString::fromLatin1(st), QString::fromLatin1(subtype)))
+        return;
+    if (st == "application/x-qrichtext") {
+        int start;
+        if ((start = t.indexOf(QLatin1String("<!--StartFragment-->"))) != -1) {
+            start += 20;
+            int end = t.indexOf(QLatin1String("<!--EndFragment-->"));
+            Q3TextCursor oldC = *cursor;
+
+            // during the setRichTextInternal() call the cursors
+            // paragraph might get joined with the provious one, so
+            // the cursors one would get deleted and oldC.paragraph()
+            // would be a dnagling pointer. To avoid that try to go
+            // one letter back and later go one forward again.
+            oldC.gotoPreviousLetter();
+            bool couldGoBack = oldC != *cursor;
+            // first para might get deleted, so remember to reset it
+            bool wasAtFirst = oldC.paragraph() == doc->firstParagraph();
+
+            if (start < end)
+                t = t.mid(start, end - start);
+            else
+                t = t.mid(start);
+            lastFormatted = cursor->paragraph();
+            if (lastFormatted->prev())
+                lastFormatted = lastFormatted->prev();
+            doc->setRichTextInternal(t, cursor);
+
+            // the first para might have been deleted in
+            // setRichTextInternal(). To be sure, reset it if
+            // necessary.
+            if (wasAtFirst) {
+                int index = oldC.index();
+                oldC.setParagraph(doc->firstParagraph());
+                oldC.setIndex(index);
+            }
+
+            // if we went back one letter before (see last comment),
+            // go one forward to point to the right position
+            if (couldGoBack)
+                oldC.gotoNextLetter();
+
+            if (undoEnabled && !isReadOnly()) {
+                doc->setSelectionStart(Q3TextDocument::Temp, oldC);
+                doc->setSelectionEnd(Q3TextDocument::Temp, *cursor);
+
+                checkUndoRedoInfo(UndoRedoInfo::Insert);
+                if (!undoRedoInfo.valid()) {
+                    undoRedoInfo.id = oldC.paragraph()->paragId();
+                    undoRedoInfo.index = oldC.index();
+                    undoRedoInfo.d->text.clear();
+                }
+                int oldLen = undoRedoInfo.d->text.length();
+                if (!doc->preProcessor()) {
+                    QString txt = doc->selectedText(Q3TextDocument::Temp);
+                    undoRedoInfo.d->text += txt;
+                    for (int i = 0; i < (int)txt.length(); ++i) {
+                        if (txt[i] != QLatin1Char('\n') && oldC.paragraph()->at(oldC.index())->format()) {
+                            oldC.paragraph()->at(oldC.index())->format()->addRef();
+                            undoRedoInfo.d->text.
+                                setFormat(oldLen + i, oldC.paragraph()->at(oldC.index())->format(), true);
+                        }
+                        oldC.gotoNextLetter();
+                    }
+                }
+                undoRedoInfo.clear();
+                removeSelection(Q3TextDocument::Temp);
+            }
+
+            formatMore();
+            setModified();
+            emit textChanged();
+            repaintChanged();
+            ensureCursorVisible();
+            return;
+        }
+    } else {
+#if defined(Q_OS_WIN32)
+        // Need to convert CRLF to LF
+        t.replace(QLatin1String("\r\n"), QLatin1String("\n"));
+#elif defined(Q_OS_MAC)
+        //need to convert CR to LF
+        t.replace(QLatin1Char('\r'), QLatin1Char('\n'));
+#endif
+        QChar *uc = (QChar *)t.unicode();
+        for (int i = 0; i < t.length(); i++) {
+            if (uc[i] < QLatin1Char(' ') && uc[i] != QLatin1Char('\n') && uc[i] != QLatin1Char('\t'))
+                uc[i] = QLatin1Char(' ');
+        }
+        if (!t.isEmpty())
+            insert(t, false, true);
+    }
+#endif //QT_NO_MIME
+}
+
+#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 Q3TextEdit::pasteSpecial(const QPoint& pt)
+{
+    QByteArray st = pickSpecial(QApplication::clipboard()->data(d->clipboard_mode),
+                               true, pt);
+    if (!st.isEmpty())
+        pasteSubType(st);
+}
+#endif
+#ifndef QT_NO_MIME
+QByteArray Q3TextEdit::pickSpecial(QMimeSource* ms, bool always_ask, const QPoint& pt)
+{
+    if (ms)  {
+#ifndef QT_NO_MENU
+        QMenu popup(this);
+        QString fmt;
+        int n = 0;
+        QHash<QString, bool> done;
+        for (int i = 0; !(fmt = QLatin1String(ms->format(i))).isNull(); i++) {
+            int semi = fmt.indexOf(QLatin1Char(';'));
+            if (semi >= 0)
+                fmt = fmt.left(semi);
+            if (fmt.left(5) == QLatin1String("text/")) {
+                fmt = fmt.mid(5);
+                if (!done.contains(fmt)) {
+                    done.insert(fmt,true);
+                    popup.insertItem(fmt, i);
+                    n++;
+                }
+            }
+        }
+        if (n) {
+            QAction *action = (n == 1 && !always_ask)
+                ? popup.actions().at(0)
+                : popup.exec(pt);
+            if (action)
+                return action->text().toLatin1();
+        }
+#else
+        QString fmt;
+        for (int i = 0; !(fmt = ms->format(i)).isNull(); i++) {
+            int semi = fmt.indexOf(';');
+            if (semi >= 0)
+                fmt = fmt.left(semi);
+            if (fmt.left(5) == "text/") {
+                fmt = fmt.mid(5);
+                return fmt.latin1();
+            }
+        }
+#endif
+    }
+    return QByteArray();
+}
+#endif // QT_NO_MIME
+#endif // QT_NO_CLIPBOARD
+
+/*!
+    \enum Q3TextEdit::WordWrap
+
+    This enum defines the Q3TextEdit's word wrap modes.
+
+    \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 Q3TextEdit::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 Q3TextEdit::setWordWrap(WordWrap mode)
+{
+    if (wrapMode == mode)
+        return;
+    wrapMode = mode;
+    switch (mode) {
+    case NoWrap:
+        document()->formatter()->setWrapEnabled(false);
+        document()->formatter()->setWrapAtColumn(-1);
+        doc->setWidth(visibleWidth());
+        doc->setMinimumWidth(-1);
+        doc->invalidate();
+        updateContents();
+        lastFormatted = doc->firstParagraph();
+        interval = 0;
+        formatMore();
+        break;
+    case WidgetWidth:
+        document()->formatter()->setWrapEnabled(true);
+        document()->formatter()->setWrapAtColumn(-1);
+        doResize();
+        break;
+    case FixedPixelWidth:
+        document()->formatter()->setWrapEnabled(true);
+        document()->formatter()->setWrapAtColumn(-1);
+        if (wrapWidth < 0)
+            wrapWidth = 200;
+        setWrapColumnOrWidth(wrapWidth);
+        break;
+    case FixedColumnWidth:
+        if (wrapWidth < 0)
+            wrapWidth = 80;
+        document()->formatter()->setWrapEnabled(true);
+        document()->formatter()->setWrapAtColumn(wrapWidth);
+        setWrapColumnOrWidth(wrapWidth);
+        break;
+    }
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    checkOptimMode();
+#endif
+}
+
+Q3TextEdit::WordWrap Q3TextEdit::wordWrap() const
+{
+    return wrapMode;
+}
+
+/*!
+    \property Q3TextEdit::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 Q3TextEdit::setWrapColumnOrWidth(int value)
+{
+    wrapWidth = value;
+    if (wrapMode == FixedColumnWidth) {
+        document()->formatter()->setWrapAtColumn(wrapWidth);
+        resizeContents(0, 0);
+        doc->setWidth(visibleWidth());
+        doc->setMinimumWidth(-1);
+    } else if (wrapMode == FixedPixelWidth) {
+        document()->formatter()->setWrapAtColumn(-1);
+        resizeContents(wrapWidth, 0);
+        doc->setWidth(wrapWidth);
+        doc->setMinimumWidth(wrapWidth);
+    } else {
+        return;
+    }
+    doc->invalidate();
+    updateContents();
+    lastFormatted = doc->firstParagraph();
+    interval = 0;
+    formatMore();
+}
+
+int Q3TextEdit::wrapColumnOrWidth() const
+{
+    if (wrapMode == WidgetWidth)
+        return visibleWidth();
+    return wrapWidth;
+}
+
+
+/*!
+    \enum Q3TextEdit::WrapPolicy
+
+    This enum defines where text can be wrapped in word wrap mode.
+
+    \value AtWhiteSpace Don't use this deprecated value (it is a
+    synonym for \c AtWordBoundary which you should use instead).
+    \value Anywhere  Break anywhere, including within words.
+    \value AtWordBoundary Break lines at word boundaries, e.g. spaces or
+    newlines
+    \value AtWordOrDocumentBoundary Break lines at whitespace, e.g.
+    spaces or newlines if possible. Break it anywhere otherwise.
+
+    \sa setWrapPolicy()
+*/
+
+/*!
+    \property Q3TextEdit::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 AtWordBoundary (the default), \c
+    Anywhere and \c AtWordOrDocumentBoundary
+
+    \sa wordWrap
+*/
+
+void Q3TextEdit::setWrapPolicy(WrapPolicy policy)
+{
+    if (wPolicy == policy)
+        return;
+    wPolicy = policy;
+    Q3TextFormatter *formatter;
+    if (policy == AtWordBoundary || policy == AtWordOrDocumentBoundary) {
+        formatter = new Q3TextFormatterBreakWords;
+        formatter->setAllowBreakInWords(policy == AtWordOrDocumentBoundary);
+    } else {
+        formatter = new Q3TextFormatterBreakInWords;
+    }
+    formatter->setWrapAtColumn(document()->formatter()->wrapAtColumn());
+    formatter->setWrapEnabled(document()->formatter()->isWrapEnabled(0));
+    document()->setFormatter(formatter);
+    doc->invalidate();
+    updateContents();
+    lastFormatted = doc->firstParagraph();
+    interval = 0;
+    formatMore();
+}
+
+Q3TextEdit::WrapPolicy Q3TextEdit::wrapPolicy() const
+{
+    return wPolicy;
+}
+
+/*!
+    Deletes all the text in the text edit.
+
+    \sa cut() removeSelectedText() setText()
+*/
+
+void Q3TextEdit::clear()
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        optimSetText(QLatin1String(""));
+    } else
+#endif
+    {
+        // make clear undoable
+        doc->selectAll(Q3TextDocument::Temp);
+        removeSelectedText(Q3TextDocument::Temp);
+        setContentsPos(0, 0);
+        if (cursor->isValid())
+            cursor->restoreState();
+        doc->clear(true);
+        delete cursor;
+        cursor = new Q3TextCursor(doc);
+        lastFormatted = 0;
+    }
+    updateContents();
+
+    emit cursorPositionChanged(cursor);
+    emit cursorPositionChanged(cursor->paragraph()->paragId(), cursor->index());
+}
+
+int Q3TextEdit::undoDepth() const
+{
+    return document()->undoDepth();
+}
+
+/*!
+    \property Q3TextEdit::length
+    \brief the number of characters in the text
+*/
+
+int Q3TextEdit::length() const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode)
+        return d->od->len;
+    else
+#endif
+        return document()->length();
+}
+
+/*!
+    \property Q3TextEdit::tabStopWidth
+    \brief the tab stop width in pixels
+*/
+
+int Q3TextEdit::tabStopWidth() const
+{
+    return document()->tabStopWidth();
+}
+
+void Q3TextEdit::setUndoDepth(int d)
+{
+    document()->setUndoDepth(d);
+}
+
+void Q3TextEdit::setTabStopWidth(int ts)
+{
+    document()->setTabStops(ts);
+    doc->invalidate();
+    lastFormatted = doc->firstParagraph();
+    interval = 0;
+    formatMore();
+    updateContents();
+}
+
+/*!
+    \reimp
+*/
+
+QSize Q3TextEdit::sizeHint() const
+{
+    // cf. Q3ScrollView::sizeHint()
+    ensurePolished();
+    int f = 2 * frameWidth();
+    int h = fontMetrics().height();
+    QSize sz(f, f);
+    return sz.expandedTo(QSize(12 * h, 8 * h));
+}
+
+void Q3TextEdit::clearUndoRedo()
+{
+    if (!undoEnabled)
+        return;
+    undoRedoInfo.clear();
+    emit undoAvailable(doc->commands()->isUndoAvailable());
+    emit redoAvailable(doc->commands()->isRedoAvailable());
+}
+
+/*!  \internal
+  \warning In Qt 3.1 we will provide a cleaer API for the
+  functionality which is provided by this function and in Qt 4.0 this
+  function will go away.
+
+  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 Q3TextEdit::getFormat(int para, int index, QFont *font, QColor *color, VerticalAlignment *verticalAlignment)
+{
+    if (!font || !color)
+        return false;
+    Q3TextParagraph *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;
+}
+
+/*!  \internal
+  \warning In Qt 3.1 we will provide a cleaer API for the
+  functionality which is provided by this function and in Qt 4.0 this
+  function will go away.
+
+  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 Q3StyleSheetItem::DisplayListItem) and \a
+  listDepth to the depth of the list (if the display mode is
+  Q3StyleSheetItem::DisplayListItem).
+
+  Returns false if \a para is out of range otherwise returns true.
+*/
+
+bool Q3TextEdit::getParagraphFormat(int para, QFont *font, QColor *color,
+                                    VerticalAlignment *verticalAlignment, int *alignment,
+                                    Q3StyleSheetItem::DisplayMode *displayMode,
+                                    Q3StyleSheetItem::ListStyle *listStyle,
+                                    int *listDepth)
+{
+    if (!font || !color || !alignment || !displayMode || !listStyle)
+        return false;
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return false;
+    *font = p->at(0)->format()->font();
+    *color = p->at(0)->format()->color();
+    *verticalAlignment = (VerticalAlignment)p->at(0)->format()->vAlign();
+    *alignment = p->alignment();
+    *displayMode = p->isListItem() ? Q3StyleSheetItem::DisplayListItem : Q3StyleSheetItem::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.
+
+    \warning The QPopupMenu ID values 0-7 are reserved, and they map to the
+    standard operations. When inserting items into your custom popup menu, be
+    sure to specify ID values larger than 7.
+*/
+
+Q3PopupMenu *Q3TextEdit::createPopupMenu(const QPoint& pos)
+{
+    Q_UNUSED(pos)
+#ifndef QT_NO_POPUPMENU
+    Q3PopupMenu *popup = new Q3PopupMenu(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->addSeparator();
+    }
+#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->addSeparator();
+    }
+#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(Q3TextDocument::Standard, true));
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    popup->setItemEnabled(d->id[IdCopy], d->optimMode ? optimHasSelection() : doc->hasSelection(Q3TextDocument::Standard, true));
+#else
+    popup->setItemEnabled(d->id[IdCopy], doc->hasSelection(Q3TextDocument::Standard, true));
+#endif
+    popup->setItemEnabled(d->id[IdPaste], !isReadOnly() && !QApplication::clipboard()->text(d->clipboard_mode).isEmpty());
+#endif
+    const bool isEmptyDocument = (length() == 0);
+    popup->setItemEnabled(d->id[IdClear], !isReadOnly() && !isEmptyDocument);
+    popup->setItemEnabled(d->id[IdSelectAll], !isEmptyDocument);
+    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.
+
+    This function is only called if createPopupMenu(const QPoint &)
+    returns 0.
+*/
+
+Q3PopupMenu *Q3TextEdit::createPopupMenu()
+{
+    return 0;
+}
+
+/*!
+    \fn Q3TextEdit::zoomIn()
+
+    \overload
+
+    Zooms in on the text by making the base font size one point
+    larger and recalculating all font sizes to be the new size. This
+    does not change the size of any images.
+
+    \sa zoomOut()
+*/
+
+/*!
+    \fn Q3TextEdit::zoomOut()
+
+    \overload
+
+    Zooms out on the text by making the base font size one point
+    smaller and recalculating all font sizes to be the new size. This
+    does not change the size of any images.
+
+    \sa zoomIn()
+*/
+
+
+/*!
+    Zooms in on the text by making the base font size \a range
+    points larger and recalculating all font sizes to be the new size.
+    This does not change the size of any images.
+
+    \sa zoomOut()
+*/
+
+void Q3TextEdit::zoomIn(int range)
+{
+    QFont f(Q3ScrollView::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 to be the new size. This
+    does not change the size of any images.
+
+    \sa zoomIn()
+*/
+
+void Q3TextEdit::zoomOut(int range)
+{
+    QFont f(Q3ScrollView::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 to be the new size. This does not
+    change the size of any images.
+*/
+
+void Q3TextEdit::zoomTo(int size)
+{
+    QFont f(Q3ScrollView::font());
+    f.setPointSize(size);
+    setFont(f);
+}
+
+/*!
+   Q3TextEdit 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 Q3TextEdit::sync()
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        QFontMetrics fm(Q3ScrollView::font());
+        resizeContents(d->od->maxLineWidth + 4, d->od->numLines * fm.lineSpacing() + 1);
+    } else
+#endif
+    {
+        while (lastFormatted) {
+            lastFormatted->format();
+            lastFormatted = lastFormatted->next();
+        }
+        resizeContents(contentsWidth(), doc->height());
+    }
+    updateScrollBars();
+}
+
+/*!
+    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 \a selNum > 0. The default selection (\a
+    selNum == 0) gets its attributes from the text edit's
+    palette().
+*/
+
+void Q3TextEdit::setSelectionAttributes(int selNum, const QColor &back, bool invertText)
+{
+    if (selNum < 1)
+        return;
+    if (selNum > doc->numSelections())
+        doc->addSelection(selNum);
+    doc->setSelectionColor(selNum, back);
+    if (invertText)
+        doc->setSelectionTextColor(selNum, palette().color(QPalette::HighlightedText));
+}
+
+/*!
+    \reimp
+*/
+void Q3TextEdit::changeEvent(QEvent *ev)
+{
+    if(ev->type() == QEvent::ActivationChange) {
+        if (!isActiveWindow() && scrollTimer)
+            scrollTimer->stop();
+        if (!palette().isEqual(QPalette::Active, QPalette::Inactive))
+            updateContents();
+    }
+
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode && (ev->type() == QEvent::ApplicationFontChange
+                         || ev->type() == QEvent::FontChange)) {
+        QFont f = font();
+        if (f.kerning())
+            f.setKerning(false);
+
+        setFont(f);
+
+        Q3ScrollView::setFont(f);
+        doc->setDefaultFormat(f, doc->formatCollection()->defaultFormat()->color());
+        // recalculate the max string width
+        QFontMetrics fm(f);
+        int i, sw;
+        d->od->maxLineWidth = 0;
+        for (i = 0; i < d->od->numLines; i++) {
+            sw = fm.width(d->od->lines[LOGOFFSET(i)]);
+            if (d->od->maxLineWidth < sw)
+                d->od->maxLineWidth = sw;
+        }
+        resizeContents(d->od->maxLineWidth + 4, d->od->numLines * fm.lineSpacing() + 1);
+        return;
+    }
+#endif
+
+    Q3ScrollView::changeEvent(ev);
+
+    if (textFormat() == Qt::PlainText) {
+        if (ev->type() == QEvent::ApplicationPaletteChange || ev->type() == QEvent::PaletteChange
+            || ev->type() == QEvent::EnabledChange) {
+            Q3TextFormat *f = doc->formatCollection()->defaultFormat();
+            f->setColor(palette().text().color());
+            updateContents();
+        }
+    }
+
+    if (ev->type() == QEvent::ApplicationFontChange || ev->type() == QEvent::FontChange) {
+        QFont f = font();
+        if (f.kerning())
+            f.setKerning(false);
+        doc->setMinimumWidth(-1);
+        doc->setDefaultFormat(f, doc->formatCollection()->defaultFormat()->color());
+        lastFormatted = doc->firstParagraph();
+        formatMore();
+        repaintChanged();
+    }
+}
+
+void Q3TextEdit::setReadOnly(bool b)
+{
+    if (readonly == b)
+        return;
+    readonly = b;
+    d->cursorBlinkActive = !b;
+#ifndef QT_NO_CURSOR
+    if (readonly)
+        viewport()->setCursor(Qt::ArrowCursor);
+    else
+        viewport()->setCursor(Qt::IBeamCursor);
+    setInputMethodEnabled(!readonly);
+#endif
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    checkOptimMode();
+#endif
+}
+
+/*!
+    Scrolls to the bottom of the document and does formatting if
+    required.
+*/
+
+void Q3TextEdit::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 Q3TextEdit::paragraphRect(int para) const
+{
+    Q3TextEdit *that = (Q3TextEdit *)this;
+    that->sync();
+    Q3TextParagraph *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).
+*/
+
+int Q3TextEdit::paragraphAt(const QPoint &pos) const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        QFontMetrics fm(Q3ScrollView::font());
+        int parag = pos.y() / fm.lineSpacing();
+        if (parag <= d->od->numLines)
+            return parag;
+        else
+            return 0;
+    }
+#endif
+    Q3TextCursor c(doc);
+    c.place(pos, doc->firstParagraph());
+    if (c.paragraph())
+        return c.paragraph()->paragId();
+    return -1; // should never happen..
+}
+
+/*!
+    Returns the index of the character (relative to its paragraph) at
+    position \a pos (in contents coordinates). If \a para is not 0,
+    \c{*}\a{para} is set to the character's paragraph.
+*/
+
+int Q3TextEdit::charAt(const QPoint &pos, int *para) const
+{
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+    if (d->optimMode) {
+        int par = paragraphAt(pos);
+        if (para)
+            *para = par;
+        return optimCharIndex(d->od->lines[LOGOFFSET(par)], pos.x());
+    }
+#endif
+    Q3TextCursor c(doc);
+    c.place(pos, doc->firstParagraph());
+    if (c.paragraph()) {
+        if (para)
+            *para = c.paragraph()->paragId();
+        return c.index();
+    }
+    return -1; // should never happen..
+}
+
+/*!
+    Sets the background color of the paragraph \a para to \a bg.
+*/
+
+void Q3TextEdit::setParagraphBackgroundColor(int para, const QColor &bg)
+{
+    Q3TextParagraph *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 Q3TextEdit::clearParagraphBackground(int para)
+{
+    Q3TextParagraph *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 Q3TextEdit::paragraphBackgroundColor(int para) const
+{
+    Q3TextParagraph *p = doc->paragAt(para);
+    if (!p)
+        return QColor();
+    QColor *c = p->backgroundColor();
+    if (c)
+        return *c;
+    return QColor();
+}
+
+/*!
+    \property Q3TextEdit::undoRedoEnabled
+    \brief whether undo/redo is enabled
+
+    When changing this property, the undo/redo history is cleared.
+
+    The default is true.
+*/
+
+void Q3TextEdit::setUndoRedoEnabled(bool b)
+{
+    undoRedoInfo.clear();
+    doc->commands()->clear();
+
+    undoEnabled = b;
+}
+
+bool Q3TextEdit::isUndoRedoEnabled() const
+{
+    return undoEnabled;
+}
+
+/*!
+    Returns true if undo is available; otherwise returns false.
+*/
+
+bool Q3TextEdit::isUndoAvailable() const
+{
+    return undoEnabled && (doc->commands()->isUndoAvailable() || undoRedoInfo.valid());
+}
+
+/*!
+    Returns true if redo is available; otherwise returns false.
+*/
+
+bool Q3TextEdit::isRedoAvailable() const
+{
+    return undoEnabled && doc->commands()->isRedoAvailable();
+}
+
+void Q3TextEdit::ensureFormatted(Q3TextParagraph *p)
+{
+    while (!p->isValid()) {
+        if (!lastFormatted)
+            return;
+        formatMore();
+    }
+}
+
+/*! \internal */
+void Q3TextEdit::updateCursor(const QPoint & pos)
+{
+    if (isReadOnly() && linksEnabled()) {
+        Q3TextCursor c = *cursor;
+        placeCursor(pos, &c, true);
+
+#ifndef QT_NO_NETWORKPROTOCOL
+        bool insideParagRect = true;
+        if (c.paragraph() == doc->lastParagraph()
+            && c.paragraph()->rect().y() + c.paragraph()->rect().height() < pos.y())
+            insideParagRect = false;
+        if (insideParagRect && c.paragraph() && c.paragraph()->at(c.index()) &&
+            c.paragraph()->at(c.index())->isAnchor()) {
+            if (!c.paragraph()->at(c.index())->anchorHref().isEmpty()
+                    && c.index() < c.paragraph()->length() - 1)
+                onLink = c.paragraph()->at(c.index())->anchorHref();
+            else
+                onLink.clear();
+
+            if (!c.paragraph()->at(c.index())->anchorName().isEmpty()
+                    && c.index() < c.paragraph()->length() - 1)
+                d->onName = c.paragraph()->at(c.index())->anchorName();
+            else
+                d->onName.clear();
+
+            if (!c.paragraph()->at(c.index())->anchorHref().isEmpty()) {
+#ifndef QT_NO_CURSOR
+                viewport()->setCursor(onLink.isEmpty() ? Qt::ArrowCursor : Qt::PointingHandCursor);
+#endif
+                QUrl u = QUrl(doc->context()).resolved(onLink);
+                emitHighlighted(u.toString(QUrl::None));
+            }
+        } else {
+#ifndef QT_NO_CURSOR
+            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
+#endif
+            onLink.clear();
+            emitHighlighted(QString());
+        }
+#endif
+    }
+}
+
+/*!
+  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 Q3TextEdit::placeCursor(const QPoint &pos, Q3TextCursor *c)
+{
+    placeCursor(pos, c, false);
+}
+
+/*! \internal */
+void Q3TextEdit::clipboardChanged()
+{
+#ifndef QT_NO_CLIPBOARD
+    // don't listen to selection changes
+    disconnect(QApplication::clipboard(), SIGNAL(selectionChanged()), this, 0);
+#endif
+    selectAll(false);
+}
+
+/*! \property Q3TextEdit::tabChangesFocus
+  \brief whether TAB changes focus or is accepted as input
+
+  In some occasions text edits should not allow the user to input
+  tabulators or change indentation using the TAB key, as this breaks
+  the focus chain. The default is false.
+
+*/
+
+void Q3TextEdit::setTabChangesFocus(bool b)
+{
+    d->tabChangesFocus = b;
+}
+
+bool Q3TextEdit::tabChangesFocus() const
+{
+    return d->tabChangesFocus;
+}
+
+#ifdef QT_TEXTEDIT_OPTIMIZATION
+/* Implementation of optimized Qt::LogText mode follows */
+
+static void qSwap(int * a, int * b)
+{
+    if (!a || !b)
+        return;
+    int tmp = *a;
+    *a = *b;
+    *b = tmp;
+}
+
+/*! \internal */
+bool Q3TextEdit::checkOptimMode()
+{
+    bool oldMode = d->optimMode;
+    if (textFormat() == Qt::LogText) {
+        d->optimMode = true;
+        setReadOnly(true);
+    } else {
+        d->optimMode = false;
+    }
+
+    // when changing mode - try to keep selections and text
+    if (oldMode != d->optimMode) {
+        if (d->optimMode) {
+            d->od = new Q3TextEditOptimPrivate;
+            connect(scrollTimer, SIGNAL(timeout()), this, SLOT(optimDoAutoScroll()));
+            disconnect(doc, SIGNAL(minimumWidthChanged(int)), this, SLOT(documentWidthChanged(int)));
+            disconnect(scrollTimer, SIGNAL(timeout()), this, SLOT(autoScrollTimerDone()));
+            disconnect(formatTimer, SIGNAL(timeout()), this, SLOT(formatMore()));
+            optimSetText(doc->originalText());
+            doc->clear(true);
+            delete cursor;
+            cursor = new Q3TextCursor(doc);
+        } else {
+            disconnect(scrollTimer, SIGNAL(timeout()), this, SLOT(optimDoAutoScroll()));
+            connect(doc, SIGNAL(minimumWidthChanged(int)), this, SLOT(documentWidthChanged(int)));
+            connect(scrollTimer, SIGNAL(timeout()), this, SLOT(autoScrollTimerDone()));
+            connect(formatTimer, SIGNAL(timeout()), this, SLOT(formatMore()));
+            setText(optimText());
+            delete d->od;
+            d->od = 0;
+        }
+    }
+    return d->optimMode;
+}
+
+/*! \internal */
+QString Q3TextEdit::optimText() const
+{
+    QString str, tmp;
+
+    if (d->od->len == 0)
+        return str;
+
+    // concatenate all strings
+    int i;
+    int offset;
+    QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator it;
+    Q3TextEditOptimPrivate::Tag * ftag = 0;
+    for (i = 0; i < d->od->numLines; i++) {
+        if (d->od->lines[LOGOFFSET(i)].isEmpty()) { // CR lines are empty
+            str += QLatin1Char('\n');
+        } else {
+            tmp = d->od->lines[LOGOFFSET(i)] + QLatin1Char('\n');
+            // inject the tags for this line
+            if ((it = d->od->tagIndex.constFind(LOGOFFSET(i))) != d->od->tagIndex.constEnd())
+                ftag = it.value();
+            offset = 0;
+            while (ftag && ftag->line == i) {
+                tmp.insert(ftag->index + offset, QLatin1Char('<') + ftag->tag + QLatin1Char('>'));
+                offset += ftag->tag.length() + 2; // 2 -> the '<' and '>' chars
+                ftag = ftag->next;
+            }
+            str += tmp;
+        }
+    }
+    return str;
+}
+
+/*! \internal */
+void Q3TextEdit::optimSetText(const QString &str)
+{
+    optimRemoveSelection();
+// this is just too slow - but may have to go in due to compatibility reasons
+//     if (str == optimText())
+//         return;
+    d->od->numLines = 0;
+    d->od->lines.clear();
+    d->od->maxLineWidth = 0;
+    d->od->len = 0;
+    d->od->clearTags();
+    QFontMetrics fm(Q3ScrollView::font());
+    if (!(str.isEmpty() || str.isNull() || d->maxLogLines == 0)) {
+        QStringList strl = str.split(QLatin1Char('\n'));
+        int lWidth = 0;
+        for (QStringList::Iterator it = strl.begin(); it != strl.end(); ++it) {
+            optimParseTags(&*it);
+            optimCheckLimit(*it);
+            lWidth = fm.width(*it);
+            if (lWidth > d->od->maxLineWidth)
+                d->od->maxLineWidth = lWidth;
+        }
+    }
+    resizeContents(d->od->maxLineWidth + 4, d->od->numLines * fm.lineSpacing() + 1);
+    repaintContents();
+    emit textChanged();
+}
+
+/*! \internal
+
+  Append \a tag to the tag list.
+*/
+Q3TextEditOptimPrivate::Tag * Q3TextEdit::optimAppendTag(int index, const QString & tag)
+{
+    Q3TextEditOptimPrivate::Tag * t = new Q3TextEditOptimPrivate::Tag, * tmp;
+
+    if (d->od->tags == 0)
+        d->od->tags = t;
+    t->bold = t->italic = t->underline = false;
+    t->line  = d->od->numLines;
+    t->index = index;
+    t->tag   = tag;
+    t->leftTag = 0;
+    t->parent  = 0;
+    t->prev = d->od->lastTag;
+    if (d->od->lastTag)
+        d->od->lastTag->next = t;
+    t->next = 0;
+    d->od->lastTag = t;
+    tmp = d->od->tagIndex[LOGOFFSET(t->line)];
+    if (!tmp || (tmp && tmp->index > t->index)) {
+        d->od->tagIndex.insert(LOGOFFSET(t->line), t);
+    }
+    return t;
+}
+
+/*! \internal
+
+  Insert \a tag in the tag - according to line and index numbers
+*/
+Q3TextEditOptimPrivate::Tag *Q3TextEdit::optimInsertTag(int line, int index, const QString &tag)
+{
+    Q3TextEditOptimPrivate::Tag *t = new Q3TextEditOptimPrivate::Tag, *tmp;
+
+    if (d->od->tags == 0)
+        d->od->tags = t;
+    t->bold = t->italic = t->underline = false;
+    t->line  = line;
+    t->index = index;
+    t->tag   = tag;
+    t->leftTag = 0;
+    t->parent  = 0;
+    t->next = 0;
+    t->prev = 0;
+
+    // find insertion pt. in tag struct.
+    QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator it;
+    if ((it = d->od->tagIndex.constFind(LOGOFFSET(line))) != d->od->tagIndex.constEnd()) {
+        tmp = *it;
+        if (tmp->index >= index) { // the existing tag may be placed AFTER the one we want to insert
+            tmp = tmp->prev;
+        } else {
+            while (tmp && tmp->next && tmp->next->line == line && tmp->next->index <= index)
+                tmp = tmp->next;
+        }
+    } else {
+        tmp = d->od->tags;
+        while (tmp && tmp->next && tmp->next->line < line)
+            tmp = tmp->next;
+        if (tmp == d->od->tags)
+            tmp = 0;
+    }
+
+    t->prev = tmp;
+    t->next = tmp ? tmp->next : 0;
+    if (t->next)
+        t->next->prev = t;
+    if (tmp)
+        tmp->next = t;
+
+    tmp = d->od->tagIndex[LOGOFFSET(t->line)];
+    if (!tmp || (tmp && tmp->index >= t->index)) {
+        d->od->tagIndex.insert(LOGOFFSET(t->line), t);
+    }
+    return t;
+}
+
+/*! \internal
+
+  Find tags in \a line, remove them from \a line and put them in a
+  structure.
+
+  A tag is delimited by '<' and '>'. The characters '<', '>' and '&'
+  are escaped by using '&lt;', '&gt;' and '&amp;'. Left-tags marks
+  the starting point for formatting, while right-tags mark the ending
+  point. A right-tag is the same as a left-tag, but with a '/'
+  appearing before the tag keyword.  E.g a valid left-tag: <b>, and
+  a valid right-tag: </b>.  Tags can be nested, but they have to be
+  closed in the same order as they are opened. E.g:
+  <font color=red><font color=blue>blue</font>red</font> - is valid, while:
+  <font color=red><b>bold red</font> just bold</b> - is invalid since the font tag is
+  closed before the bold tag. Note that a tag does not have to be
+  closed: '<font color=blue>Lots of text - and then some..'  is perfectly valid for
+  setting all text appearing after the tag to blue.  A tag can be used
+  to change the color of a piece of text, or set one of the following
+  formatting attributes: bold, italic and underline.  These attributes
+  are set using the <b>, <i> and <u> tags.  Example of valid tags:
+  <font color=red>, </font>, <b>, <u>, <i>, </i>.
+  Example of valid text:
+  This is some <font color=red>red text</font>, while this is some <font color=green>green
+  text</font>. <font color=blue><font color=yellow>This is yellow</font>, while this is
+  blue.</font>
+
+  Note that only the color attribute of the HTML font tag is supported.
+
+  Limitations:
+  1. A tag cannot span several lines.
+  2. Very limited error checking - mismatching left/right-tags is the
+  only thing that is detected.
+
+*/
+void Q3TextEdit::optimParseTags(QString * line, int lineNo, int indexOffset)
+{
+    int len = line->length();
+    int i, startIndex = -1, endIndex = -1, escIndex = -1;
+    int state = 0; // 0 = outside tag, 1 = inside tag
+    bool tagOpen, tagClose;
+    int bold = 0, italic = 0, underline = 0;
+    QString tagStr;
+    QStack<Q3TextEditOptimPrivate::Tag *> tagStack;
+
+    for (i = 0; i < len; i++) {
+        tagOpen = (*line)[i] == QLatin1Char('<');
+        tagClose = (*line)[i] == QLatin1Char('>');
+
+        // handle '&lt;' and '&gt;' and '&amp;'
+        if ((*line)[i] == QLatin1Char('&')) {
+            escIndex = i;
+            continue;
+        } else if (escIndex != -1 && (*line)[i] == QLatin1Char(';')) {
+            QString esc = line->mid(escIndex, i - escIndex + 1);
+            QString c;
+            if (esc == QLatin1String("&lt;"))
+                c = QLatin1Char('<');
+            else if (esc == QLatin1String("&gt;"))
+                c = QLatin1Char('>');
+            else if (esc == QLatin1String("&amp;"))
+                c = QLatin1Char('&');
+            line->replace(escIndex, i - escIndex + 1, c);
+            len = line->length();
+            i -= i-escIndex;
+            escIndex = -1;
+            continue;
+        }
+
+        if (state == 0 && tagOpen) {
+            state = 1;
+            startIndex = i;
+            continue;
+        }
+        if (state == 1 && tagClose) {
+            state = 0;
+            endIndex = i;
+            if (!tagStr.isEmpty()) {
+                Q3TextEditOptimPrivate::Tag * tag, * cur, * tmp;
+                bool format = true;
+
+                if (tagStr == QLatin1String("b"))
+                    bold++;
+                else if (tagStr == QLatin1String("/b"))
+                    bold--;
+                else if (tagStr == QLatin1String("i"))
+                    italic++;
+                else if (tagStr == QLatin1String("/i"))
+                    italic--;
+                else if (tagStr == QLatin1String("u"))
+                    underline++;
+                else if (tagStr == QLatin1String("/u"))
+                    underline--;
+                else
+                    format = false;
+                if (lineNo > -1)
+                    tag = optimInsertTag(lineNo, startIndex + indexOffset, tagStr);
+                else
+                    tag = optimAppendTag(startIndex, tagStr);
+                // everything that is not a b, u or i tag is considered
+                // to be a color tag.
+                tag->type = format ? Q3TextEditOptimPrivate::Format
+                            : Q3TextEditOptimPrivate::Color;
+                if (tagStr[0] == QLatin1Char('/')) {
+                    // this is a right-tag - search for the left-tag
+                    // and possible parent tag
+                    cur = tag->prev;
+                    if (!cur) {
+                        qWarning("Q3TextEdit::optimParseTags: no left-tag for '<%s>' in line %d.",
+                                  tag->tag.latin1(), tag->line + 1);
+                        return; // something is wrong - give up
+                    }
+                    while (cur) {
+                        if (cur->leftTag) { // push right-tags encountered
+                            tagStack.push(cur);
+                        } else {
+                            tmp = tagStack.isEmpty() ? 0 : tagStack.pop();
+                            if (!tmp) {
+                                if (((QLatin1Char('/') + cur->tag) == tag->tag) ||
+                                     (tag->tag == QLatin1String("/font") && cur->tag.left(4) == QLatin1String("font"))) {
+                                    // set up the left and parent of this tag
+                                    tag->leftTag = cur;
+                                    tmp = cur->prev;
+                                    if (tmp && tmp->parent) {
+                                        tag->parent = tmp->parent;
+                                    } else if (tmp && !tmp->leftTag) {
+                                        tag->parent = tmp;
+                                    }
+                                    break;
+                                } else if (!cur->leftTag) {
+                                    qWarning("Q3TextEdit::optimParseTags: mismatching %s-tag for '<%s>' in line %d.",
+                                              qPrintable(QString(cur->tag[0] == QLatin1Char('/') ? QLatin1String("left") : QLatin1String("right"))),
+                                              cur->tag.latin1(), cur->line + 1);
+                                    return; // something is amiss - give up
+                                }
+                            }
+                        }
+                        cur = cur->prev;
+                    }
+                } else {
+                    tag->bold = bold > 0;
+                    tag->italic = italic > 0;
+                    tag->underline = underline > 0;
+                    tmp = tag->prev;
+                    while (tmp && tmp->leftTag) {
+                        tmp = tmp->leftTag->parent;
+                    }
+                    if (tmp) {
+                        tag->bold |= tmp->bold;
+                        tag->italic |= tmp->italic;
+                        tag->underline |= tmp->underline;
+                    }
+                }
+            }
+            if (startIndex != -1) {
+                int l = (endIndex == -1) ?
+                        line->length() - startIndex : endIndex - startIndex;
+                line->remove(startIndex, l+1);
+                len = line->length();
+                i -= l+1;
+            }
+            tagStr = QLatin1String("");
+            continue;
+        }
+
+        if (state == 1) {
+            tagStr += (*line)[i];
+        }
+    }
+}
+
+// calculate the width of a string in pixels inc. tabs
+static int qStrWidth(const QString& str, int tabWidth, const QFontMetrics& fm)
+{
+    int tabs = str.count(QLatin1Char('\t'));
+
+    if (!tabs)
+        return fm.width(str);
+
+    int newIdx = 0;
+    int lastIdx = 0;
+    int strWidth = 0;
+    int tn;
+    for (tn = 1; tn <= tabs; ++tn) {
+        newIdx = str.indexOf(QLatin1Char('\t'), newIdx);
+        strWidth += fm.width(str.mid(lastIdx, newIdx - lastIdx));
+        if (strWidth >= tn * tabWidth) {
+            int u = tn;
+            while (strWidth >= u * tabWidth)
+                ++u;
+            strWidth = u * tabWidth;
+        } else {
+            strWidth = tn * tabWidth;
+        }
+        lastIdx = ++newIdx;
+    }
+    if ((int)str.length() > newIdx)
+        strWidth += fm.width(str.mid(newIdx));
+    return strWidth;
+}
+
+bool Q3TextEdit::optimHasBoldMetrics(int line)
+{
+    Q3TextEditOptimPrivate::Tag *t;
+    QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator it;
+    if ((it = d->od->tagIndex.constFind(line)) != d->od->tagIndex.constEnd()) {
+        t = *it;
+        while (t && t->line == line) {
+            if (t->bold)
+                return true;
+            t = t->next;
+        }
+    } else if ((t = optimPreviousLeftTag(line)) && t->bold) {
+        return true;
+    }
+    return false;
+}
+
+/*! \internal
+
+  Append \a str to the current text buffer. Parses each line to find
+  formatting tags.
+*/
+void Q3TextEdit::optimAppend(const QString &str)
+{
+    if (str.isEmpty() || str.isNull() || d->maxLogLines == 0)
+        return;
+
+    QStringList strl = str.split(QLatin1Char('\n'));
+    QStringList::Iterator it = strl.begin();
+
+    QFontMetrics fm(Q3ScrollView::font());
+    int lWidth = 0;
+    for (; it != strl.end(); ++it) {
+        optimParseTags(&*it);
+        optimCheckLimit(*it);
+        if (optimHasBoldMetrics(d->od->numLines-1)) {
+            QFont fnt = Q3ScrollView::font();
+            fnt.setBold(true);
+            fm = QFontMetrics(fnt);
+        }
+        lWidth = qStrWidth(*it, tabStopWidth(), fm) + 4;
+        if (lWidth > d->od->maxLineWidth)
+            d->od->maxLineWidth = lWidth;
+    }
+    bool scrollToEnd = contentsY() >= contentsHeight() - visibleHeight();
+    resizeContents(d->od->maxLineWidth + 4, d->od->numLines * fm.lineSpacing() + 1);
+    if (scrollToEnd) {
+        updateScrollBars();
+        ensureVisible(contentsX(), contentsHeight(), 0, 0);
+    }
+    // when a max log size is set, the text may not be redrawn because
+    // the size of the viewport may not have changed
+    if (d->maxLogLines > -1)
+        viewport()->update();
+    emit textChanged();
+}
+
+static void qStripTags(QString *line)
+{
+    int len = line->length();
+    int i, startIndex = -1, endIndex = -1, escIndex = -1;
+    int state = 0; // 0 = outside tag, 1 = inside tag
+    bool tagOpen, tagClose;
+
+    for (i = 0; i < len; i++) {
+        tagOpen = (*line)[i] == QLatin1Char('<');
+        tagClose = (*line)[i] == QLatin1Char('>');
+
+        // handle '&lt;' and '&gt;' and '&amp;'
+        if ((*line)[i] == QLatin1Char('&')) {
+            escIndex = i;
+            continue;
+        } else if (escIndex != -1 && (*line)[i] == QLatin1Char(';')) {
+            QString esc = line->mid(escIndex, i - escIndex + 1);
+            QString c;
+            if (esc == QLatin1String("&lt;"))
+                c = QLatin1Char('<');
+            else if (esc == QLatin1String("&gt;"))
+                c = QLatin1Char('>');
+            else if (esc == QLatin1String("&amp;"))
+                c = QLatin1Char('&');
+            line->replace(escIndex, i - escIndex + 1, c);
+            len = line->length();
+            i -= i-escIndex;
+            escIndex = -1;
+            continue;
+        }
+
+        if (state == 0 && tagOpen) {
+            state = 1;
+            startIndex = i;
+            continue;
+        }
+        if (state == 1 && tagClose) {
+            state = 0;
+            endIndex = i;
+            if (startIndex != -1) {
+                int l = (endIndex == -1) ?
+                        line->length() - startIndex : endIndex - startIndex;
+                line->remove(startIndex, l+1);
+                len = line->length();
+                i -= l+1;
+            }
+            continue;
+        }
+    }
+}
+
+/*! \internal
+
+    Inserts the text into \a line at index \a index.
+*/
+
+void Q3TextEdit::optimInsert(const QString& text, int line, int index)
+{
+    if (text.isEmpty() || d->maxLogLines == 0)
+        return;
+    if (line < 0)
+        line = 0;
+    if (line > d->od->numLines-1)
+        line = d->od->numLines-1;
+    if (index < 0)
+        index = 0;
+    if (index > d->od->lines[line].length())
+        index = d->od->lines[line].length();
+
+    QStringList strl = text.split(QLatin1Char('\n'));
+    int numNewLines = strl.count() - 1;
+    Q3TextEditOptimPrivate::Tag *tag = 0;
+    QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator ii;
+    int x;
+
+    if (numNewLines == 0) {
+        // Case 1. Fast single line case - just inject it!
+        QString stripped = text;
+        qStripTags(&stripped);
+        d->od->lines[LOGOFFSET(line)].insert(index, stripped);
+        // move the tag indices following the insertion pt.
+        if ((ii = d->od->tagIndex.constFind(LOGOFFSET(line))) != d->od->tagIndex.constEnd()) {
+            tag = *ii;
+            while (tag && (LOGOFFSET(tag->line) == line && tag->index < index))
+                tag = tag->next;
+            while (tag && (LOGOFFSET(tag->line) == line)) {
+                tag->index += stripped.length();
+                tag = tag->next;
+            }
+        }
+        stripped = text;
+        optimParseTags(&stripped, line, index);
+    } else if (numNewLines > 0) {
+        // Case 2. We have at least 1 newline char - split at
+        // insertion pt. and make room for new lines - complex and slow!
+        QString left = d->od->lines[LOGOFFSET(line)].left(index);
+        QString right = d->od->lines[LOGOFFSET(line)].mid(index);
+
+        // rearrange lines for insertion
+        for (x = d->od->numLines - 1; x > line; x--)
+            d->od->lines[x + numNewLines] = d->od->lines[x];
+        d->od->numLines += numNewLines;
+
+        // fix the tag index and the tag line/index numbers - this
+        // might take a while..
+        for (x = line; x < d->od->numLines; x++) {
+            if ((ii = d->od->tagIndex.constFind(LOGOFFSET(line))) != d->od->tagIndex.constEnd()) {
+                tag = ii.value();
+                if (LOGOFFSET(tag->line) == line)
+                    while (tag && (LOGOFFSET(tag->line) == line && tag->index < index))
+                        tag = tag->next;
+            }
+        }
+
+        // relabel affected tags with new line numbers and new index
+        // positions
+        while (tag) {
+            if (LOGOFFSET(tag->line) == line)
+                tag->index -= index;
+            tag->line += numNewLines;
+            tag = tag->next;
+        }
+
+        // generate a new tag index
+        d->od->tagIndex.clear();
+        tag = d->od->tags;
+        while (tag) {
+            if (!((ii = d->od->tagIndex.constFind(LOGOFFSET(tag->line))) != d->od->tagIndex.constEnd()))
+                d->od->tagIndex[LOGOFFSET(tag->line)] = tag;
+            tag = tag->next;
+        }
+
+        // update the tag indices on the spliced line - needs to be done before new tags are added
+        QString stripped = strl[strl.count() - 1];
+        qStripTags(&stripped);
+        if ((ii = d->od->tagIndex.constFind(LOGOFFSET(line + numNewLines))) != d->od->tagIndex.constEnd()) {
+            tag = *ii;
+            while (tag && (LOGOFFSET(tag->line) == line + numNewLines)) {
+                tag->index += stripped.length();
+                tag = tag->next;
+            }
+        }
+
+        // inject the new lines
+        QStringList::Iterator it = strl.begin();
+        x = line;
+        int idx;
+        for (; it != strl.end(); ++it) {
+            stripped = *it;
+            qStripTags(&stripped);
+            if (x == line) {
+                stripped = left + stripped;
+                idx = index;
+            } else {
+                idx = 0;
+            }
+            d->od->lines[LOGOFFSET(x)] = stripped;
+            optimParseTags(&*it, x++, idx);
+        }
+        d->od->lines[LOGOFFSET(x - 1)] += right;
+    }
+    // recalculate the pixel width of the longest injected line -
+    QFontMetrics fm(Q3ScrollView::font());
+    int lWidth = 0;
+    for (x = line; x < line + numNewLines; x++) {
+        if (optimHasBoldMetrics(x)) {
+            QFont fnt = Q3ScrollView::font();
+            fnt.setBold(true);
+            fm = QFontMetrics(fnt);
+        }
+        lWidth = fm.width(d->od->lines[x]) + 4;
+        if (lWidth > d->od->maxLineWidth)
+            d->od->maxLineWidth = lWidth;
+    }
+    resizeContents(d->od->maxLineWidth + 4, d->od->numLines * fm.lineSpacing() + 1);
+    repaintContents();
+    emit textChanged();
+}
+
+
+/*! \internal
+
+  Returns the first open left-tag appearing before line \a line.
+ */
+Q3TextEditOptimPrivate::Tag * Q3TextEdit::optimPreviousLeftTag(int line)
+{
+    Q3TextEditOptimPrivate::Tag * ftag = 0;
+    QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator it;
+    if ((it = d->od->tagIndex.constFind(LOGOFFSET(line))) != d->od->tagIndex.constEnd())
+        ftag = it.value();
+    if (!ftag) {
+        // start searching for an open tag
+        ftag = d->od->tags;
+        while (ftag) {
+            if (ftag->line > line || ftag->next == 0) {
+                if (ftag->line > line)
+                    ftag = ftag->prev;
+                break;
+            }
+            ftag = ftag->next;
+        }
+    } else {
+        ftag = ftag->prev;
+    }
+
+    if (ftag) {
+        if (ftag && ftag->parent) // use the open parent tag
+            ftag = ftag->parent;
+        else if (ftag && ftag->leftTag) // this is a right-tag with no parent
+            ftag = 0;
+    }
+    return ftag;
+}
+
+/*! \internal
+
+  Set the format for the string starting at index \a start and ending
+  at \a end according to \a tag. If \a tag is a Format tag, find the
+  first open color tag appearing before \a tag and use that tag to
+  color the string.
+*/
+void Q3TextEdit::optimSetTextFormat(Q3TextDocument * td, Q3TextCursor * cur,
+                                    Q3TextFormat * f, int start, int end,
+                                    Q3TextEditOptimPrivate::Tag * tag)
+{
+    int formatFlags = Q3TextFormat::Bold | Q3TextFormat::Italic |
+                      Q3TextFormat::Underline;
+    cur->setIndex(start);
+    td->setSelectionStart(0, *cur);
+    cur->setIndex(end);
+    td->setSelectionEnd(0, *cur);
+    Q3StyleSheetItem * ssItem = styleSheet()->item(tag->tag);
+    if (!ssItem || tag->type == Q3TextEditOptimPrivate::Format) {
+        f->setBold(tag->bold);
+        f->setItalic(tag->italic);
+        f->setUnderline(tag->underline);
+        if (tag->type == Q3TextEditOptimPrivate::Format) {
+            // check to see if there are any open color tags prior to
+            // this format tag
+            tag = tag->prev;
+            while (tag && (tag->type == Q3TextEditOptimPrivate::Format ||
+                            tag->leftTag)) {
+                tag = tag->leftTag ? tag->parent : tag->prev;
+            }
+        }
+        if (tag) {
+            QString col = tag->tag.simplified();
+            if (col.left(10) == QLatin1String("font color")) {
+                int i = col.indexOf(QLatin1Char('='), 10);
+                col = col.mid(i + 1).simplified();
+                if (col[0] == QLatin1Char('\"'))
+                    col = col.mid(1, col.length() - 2);
+            }
+            QColor color = QColor(col);
+            if (color.isValid()) {
+                formatFlags |= Q3TextFormat::Color;
+                f->setColor(color);
+            }
+        }
+    } else { // use the stylesheet tag definition
+        if (ssItem->color().isValid()) {
+            formatFlags |= Q3TextFormat::Color;
+            f->setColor(ssItem->color());
+        }
+        f->setBold(ssItem->fontWeight() == QFont::Bold);
+        f->setItalic(ssItem->fontItalic());
+        f->setUnderline(ssItem->fontUnderline());
+    }
+    td->setFormat(0, f, formatFlags);
+    td->removeSelection(0);
+}
+
+/*! \internal */
+void Q3TextEdit::optimDrawContents(QPainter * p, int clipx, int clipy,
+                                   int clipw, int cliph)
+{
+    QFontMetrics fm(Q3ScrollView::font());
+    int startLine = clipy / fm.lineSpacing();
+
+    // we always have to fetch at least two lines for drawing because the
+    // painter may be translated so that parts of two lines cover the area
+    // of a single line
+    int nLines = (cliph / fm.lineSpacing()) + 2;
+    int endLine = startLine + nLines;
+
+    if (startLine >= d->od->numLines)
+        return;
+    if ((startLine + nLines) > d->od->numLines)
+        nLines = d->od->numLines - startLine;
+
+    int i = 0;
+    QString str;
+    for (i = startLine; i < (startLine + nLines); i++)
+        str.append(d->od->lines[LOGOFFSET(i)] + QLatin1Char('\n'));
+
+    Q3TextDocument * td = new Q3TextDocument(0);
+    td->setDefaultFormat(Q3ScrollView::font(), QColor());
+    td->setPlainText(str);
+    td->setFormatter(new Q3TextFormatterBreakWords); // deleted by QTextDoc
+    td->formatter()->setWrapEnabled(false);
+    td->setTabStops(doc->tabStopWidth());
+
+    // get the current text color from the current format
+    td->selectAll(Q3TextDocument::Standard);
+    Q3TextFormat f;
+    f.setColor(palette().text().color());
+    f.setFont(Q3ScrollView::font());
+    td->setFormat(Q3TextDocument::Standard, &f,
+                   Q3TextFormat::Color | Q3TextFormat::Font);
+    td->removeSelection(Q3TextDocument::Standard);
+
+    // add tag formatting
+    if (d->od->tags) {
+        int i = startLine;
+        QMap<int,Q3TextEditOptimPrivate::Tag *>::ConstIterator it;
+        Q3TextEditOptimPrivate::Tag * tag = 0, * tmp = 0;
+        Q3TextCursor cur(td);
+        // Step 1 - find previous left-tag
+        tmp = optimPreviousLeftTag(i);
+        for (; i < startLine + nLines; i++) {
+            if ((it = d->od->tagIndex.constFind(LOGOFFSET(i))) != d->od->tagIndex.constEnd())
+                tag = it.value();
+            // Step 2 - iterate over tags on the current line
+            int lastIndex = 0;
+            while (tag && tag->line == i) {
+                tmp = 0;
+                if (tag->prev && !tag->prev->leftTag) {
+                    tmp = tag->prev;
+                } else if (tag->prev && tag->prev->parent) {
+                    tmp = tag->prev->parent;
+                }
+                if ((tag->index - lastIndex) > 0 && tmp) {
+                    optimSetTextFormat(td, &cur, &f, lastIndex, tag->index, tmp);
+                }
+                lastIndex = tag->index;
+                tmp = tag;
+                tag = tag->next;
+            }
+            // Step 3 - color last part of the line - if necessary
+            if (tmp && tmp->parent)
+                tmp = tmp->parent;
+            if ((cur.paragraph()->length()-1 - lastIndex) > 0 && tmp && !tmp->leftTag) {
+                optimSetTextFormat(td, &cur, &f, lastIndex,
+                                    cur.paragraph()->length() - 1, tmp);
+            }
+            cur.setParagraph(cur.paragraph()->next());
+        }
+        // useful debug info
+        //
+//         tag = d->od->tags;
+//         qWarning("###");
+//         while (tag) {
+//             qWarning("Tag: %p, parent: %09p, leftTag: %09p, Name: %-15s, ParentName: %s, %d%d%d", tag,
+//                        tag->parent, tag->leftTag, tag->tag.latin1(), tag->parent ? tag->parent->tag.latin1():"<none>",
+//                       tag->bold, tag->italic, tag->underline);
+//             tag = tag->next;
+//         }
+    }
+
+    // if there is a selection, make sure that the selection in the
+    // part we need to redraw is set correctly
+    if (optimHasSelection()) {
+        Q3TextCursor c1(td);
+        Q3TextCursor c2(td);
+        int selStart = d->od->selStart.line;
+        int idxStart = d->od->selStart.index;
+        int selEnd = d->od->selEnd.line;
+        int idxEnd = d->od->selEnd.index;
+        if (selEnd < selStart) {
+            qSwap(&selStart, &selEnd);
+            qSwap(&idxStart, &idxEnd);
+        }
+        if (selEnd > d->od->numLines-1) {
+            selEnd = d->od->numLines-1;
+        }
+        if (startLine <= selStart && endLine >= selEnd) {
+            // case 1: area to paint covers entire selection
+            int paragS = selStart - startLine;
+            int paragE = paragS + (selEnd - selStart);
+            Q3TextParagraph * parag = td->paragAt(paragS);
+            if (parag) {
+                c1.setParagraph(parag);
+                if (td->text(paragS).length() >= idxStart)
+                    c1.setIndex(idxStart);
+            }
+            parag = td->paragAt(paragE);
+            if (parag) {
+                c2.setParagraph(parag);
+                if (td->text(paragE).length() >= idxEnd)
+                    c2.setIndex(idxEnd);
+            }
+        } else if (startLine > selStart && endLine < selEnd) {
+            // case 2: area to paint is all part of the selection
+            td->selectAll(Q3TextDocument::Standard);
+        } else if (startLine > selStart && endLine >= selEnd &&
+                    startLine <= selEnd) {
+            // case 3: area to paint starts inside a selection, ends past it
+            c1.setParagraph(td->firstParagraph());
+            c1.setIndex(0);
+            int paragE = selEnd - startLine;
+            Q3TextParagraph * parag = td->paragAt(paragE);
+            if (parag) {
+                c2.setParagraph(parag);
+                if (td->text(paragE).length() >= idxEnd)
+                    c2.setIndex(idxEnd);
+            }
+        } else if (startLine <= selStart && endLine < selEnd &&
+                    endLine > selStart) {
+            // case 4: area to paint starts before a selection, ends inside it
+            int paragS = selStart - startLine;
+            Q3TextParagraph * parag = td->paragAt(paragS);
+            if (parag) {
+                c1.setParagraph(parag);
+                c1.setIndex(idxStart);
+            }
+            c2.setParagraph(td->lastParagraph());
+            c2.setIndex(td->lastParagraph()->string()->toString().length() - 1);
+
+        }
+        // previously selected?
+        if (!td->hasSelection(Q3TextDocument::Standard)) {
+            td->setSelectionStart(Q3TextDocument::Standard, c1);
+            td->setSelectionEnd(Q3TextDocument::Standard, c2);
+        }
+    }
+    td->doLayout(p, contentsWidth());
+
+    // have to align the painter so that partly visible lines are
+    // drawn at the correct position within the area that needs to be
+    // painted
+    int offset = clipy % fm.lineSpacing() + 2;
+    QRect r(clipx, 0, clipw, cliph + offset);
+    p->translate(0, clipy - offset);
+    td->draw(p, r.x(), r.y(), r.width(), r.height(), palette());
+    p->translate(0, -(clipy - offset));
+    delete td;
+}
+
+/*! \internal */
+void Q3TextEdit::optimMousePressEvent(QMouseEvent * e)
+{
+    if (e->button() != Qt::LeftButton)
+        return;
+
+    QFontMetrics fm(Q3ScrollView::font());
+    mousePressed = true;
+    mousePos = e->pos();
+    d->od->selStart.line = e->y() / fm.lineSpacing();
+    if (d->od->selStart.line > d->od->numLines-1) {
+        d->od->selStart.line = d->od->numLines-1;
+        d->od->selStart.index = d->od->lines[LOGOFFSET(d->od->numLines-1)].length();
+    } else {
+        QString str = d->od->lines[LOGOFFSET(d->od->selStart.line)];
+        d->od->selStart.index = optimCharIndex(str, mousePos.x());
+    }
+    d->od->selEnd.line = d->od->selStart.line;
+    d->od->selEnd.index = d->od->selStart.index;
+    oldMousePos = e->pos();
+    repaintContents();
+}
+
+/*! \internal */
+void Q3TextEdit::optimMouseReleaseEvent(QMouseEvent * e)
+{
+    if (e->button() != Qt::LeftButton)
+        return;
+
+    if (scrollTimer->isActive())
+        scrollTimer->stop();
+    if (!inDoubleClick) {
+        QFontMetrics fm(Q3ScrollView::font());
+        d->od->selEnd.line = e->y() / fm.lineSpacing();
+        if (d->od->selEnd.line > d->od->numLines-1) {
+            d->od->selEnd.line = d->od->numLines-1;
+        }
+        QString str = d->od->lines[LOGOFFSET(d->od->selEnd.line)];
+        mousePos = e->pos();
+        d->od->selEnd.index = optimCharIndex(str, mousePos.x());
+        if (d->od->selEnd.line < d->od->selStart.line) {
+            qSwap(&d->od->selStart.line, &d->od->selEnd.line);
+            qSwap(&d->od->selStart.index, &d->od->selEnd.index);
+        } else if (d->od->selStart.line == d->od->selEnd.line &&
+                    d->od->selStart.index > d->od->selEnd.index) {
+            qSwap(&d->od->selStart.index, &d->od->selEnd.index);
+        }
+        oldMousePos = e->pos();
+        repaintContents();
+    }
+    if (mousePressed) {
+        mousePressed = false;
+        copyToClipboard();
+    }
+
+    inDoubleClick = false;
+    emit copyAvailable(optimHasSelection());
+    emit selectionChanged();
+}
+
+/*! \internal */
+void Q3TextEdit::optimMouseMoveEvent(QMouseEvent * e)
+{
+    mousePos = e->pos();
+    optimDoAutoScroll();
+    oldMousePos = mousePos;
+}
+
+/*! \internal */
+void Q3TextEdit::optimDoAutoScroll()
+{
+    if (!mousePressed)
+        return;
+
+    QFontMetrics fm(Q3ScrollView::font());
+    QPoint pos(mapFromGlobal(QCursor::pos()));
+    bool doScroll = false;
+    int xx = contentsX() + pos.x();
+    int yy = contentsY() + pos.y();
+
+    // find out how much we have to scroll in either dir.
+    if (pos.x() < 0 || pos.x() > viewport()->width() ||
+         pos.y() < 0 || pos.y() > viewport()->height()) {
+        int my = yy;
+        if (pos.x() < 0)
+            xx = contentsX() - fm.width(QLatin1Char('w'));
+        else if (pos.x() > viewport()->width())
+            xx = contentsX() + viewport()->width() + fm.width(QLatin1Char('w'));
+
+        if (pos.y() < 0) {
+            my = contentsY() - 1;
+            yy = (my / fm.lineSpacing()) * fm.lineSpacing() + 1;
+        } else if (pos.y() > viewport()->height()) {
+            my = contentsY() + viewport()->height() + 1;
+            yy = (my / fm.lineSpacing() + 1) * fm.lineSpacing() - 1;
+        }
+        d->od->selEnd.line = my / fm.lineSpacing();
+        mousePos.setX(xx);
+        mousePos.setY(my);
+        doScroll = true;
+    } else {
+        d->od->selEnd.line = mousePos.y() / fm.lineSpacing();
+    }
+
+    if (d->od->selEnd.line < 0) {
+        d->od->selEnd.line = 0;
+    } else if (d->od->selEnd.line > d->od->numLines-1) {
+        d->od->selEnd.line = d->od->numLines-1;
+    }
+
+    QString str = d->od->lines[LOGOFFSET(d->od->selEnd.line)];
+    d->od->selEnd.index = optimCharIndex(str, mousePos.x());
+
+    // have to have a valid index before generating a paint event
+    if (doScroll)
+        ensureVisible(xx, yy, 1, 1);
+
+    // if the text document is smaller than the height of the viewport
+    // - redraw the whole thing otherwise calculate the rect that
+    // needs drawing.
+    if (d->od->numLines * fm.lineSpacing() < viewport()->height()) {
+        repaintContents(contentsX(), contentsY(), width(), height());
+    } else {
+        int h = QABS(mousePos.y() - oldMousePos.y()) + fm.lineSpacing() * 2;
+        int y;
+        if (oldMousePos.y() < mousePos.y()) {
+            y = oldMousePos.y() - fm.lineSpacing();
+        } else {
+            // expand paint area for a fully selected line
+            h += fm.lineSpacing();
+            y = mousePos.y() - fm.lineSpacing()*2;
+        }
+        if (y < 0)
+            y = 0;
+        repaintContents(contentsX(), y, width(), h);
+    }
+
+    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();
+}
+
+/*! \internal
+
+  Returns the index of the character in the string \a str that is
+  currently under the mouse pointer.
+*/
+int Q3TextEdit::optimCharIndex(const QString &str, int mx) const
+{
+    QFontMetrics fm(Q3ScrollView::font());
+    int i = 0;
+    int dd, dist = 10000000;
+    int curpos = 0;
+    int strWidth;
+    mx = mx - 4; // ### get the real margin from somewhere
+
+    if (!str.contains(QLatin1Char('\t')) && mx > fm.width(str))
+        return str.length();
+
+    while (i < str.length()) {
+        strWidth = qStrWidth(str.left(i), tabStopWidth(), fm);
+        dd = strWidth - mx;
+        if (QABS(dd) <= dist) {
+            dist = QABS(dd);
+            if (mx >= strWidth)
+                curpos = i;
+        }
+        ++i;
+    }
+    return curpos;
+}
+
+/*! \internal */
+void Q3TextEdit::optimSelectAll()
+{
+    d->od->selStart.line = d->od->selStart.index = 0;
+    d->od->selEnd.line = d->od->numLines - 1;
+    d->od->selEnd.index = d->od->lines[LOGOFFSET(d->od->selEnd.line)].length();
+
+    repaintContents();
+    emit copyAvailable(optimHasSelection());
+    emit selectionChanged();
+}
+
+/*! \internal */
+void Q3TextEdit::optimRemoveSelection()
+{
+    d->od->selStart.line = d->od->selEnd.line = -1;
+    d->od->selStart.index = d->od->selEnd.index = -1;
+    repaintContents();
+}
+
+/*! \internal */
+void Q3TextEdit::optimSetSelection(int startLine, int startIdx,
+                                       int endLine, int endIdx)
+{
+    d->od->selStart.line = startLine;
+    d->od->selEnd.line = endLine;
+    d->od->selStart.index = startIdx;
+    d->od->selEnd.index = endIdx;
+}
+
+/*! \internal */
+bool Q3TextEdit::optimHasSelection() const
+{
+    if (d->od->selStart.line != d->od->selEnd.line ||
+         d->od->selStart.index != d->od->selEnd.index)
+        return true;
+    return false;
+}
+
+/*! \internal */
+QString Q3TextEdit::optimSelectedText() const
+{
+    QString str;
+
+    if (!optimHasSelection())
+        return str;
+
+    // concatenate all strings
+    if (d->od->selStart.line == d->od->selEnd.line) {
+        str = d->od->lines[LOGOFFSET(d->od->selEnd.line)].mid(d->od->selStart.index,
+                           d->od->selEnd.index - d->od->selStart.index);
+    } else {
+        int i = d->od->selStart.line;
+        str = d->od->lines[LOGOFFSET(i)].right(d->od->lines[LOGOFFSET(i)].length() -
+                                  d->od->selStart.index) + QLatin1Char('\n');
+        i++;
+        for (; i < d->od->selEnd.line; i++) {
+            if (d->od->lines[LOGOFFSET(i)].isEmpty()) // CR lines are empty
+                str += QLatin1Char('\n');
+            else
+                str += d->od->lines[LOGOFFSET(i)] + QLatin1Char('\n');
+        }
+        str += d->od->lines[LOGOFFSET(d->od->selEnd.line)].left(d->od->selEnd.index);
+    }
+    return str;
+}
+
+/*! \internal */
+bool Q3TextEdit::optimFind(const QString & expr, bool cs, bool /*wo*/,
+                               bool fw, int * para, int * index)
+{
+    bool found = false;
+    int parag = para ? *para : d->od->search.line,
+          idx = index ? *index : d->od->search.index, i;
+
+    if (d->od->len == 0)
+        return false;
+
+    for (i = parag; fw ? i < d->od->numLines : i >= 0; fw ? i++ : i--) {
+        idx = fw
+              ? d->od->lines[LOGOFFSET(i)].indexOf(expr, idx,
+                                                     cs ? Qt::CaseSensitive : Qt::CaseInsensitive)
+              : d->od->lines[LOGOFFSET(i)].lastIndexOf(expr, idx,
+                                                         cs ? Qt::CaseSensitive : Qt::CaseInsensitive);
+        if (idx != -1) {
+            found = true;
+            break;
+        } else if (fw)
+            idx = 0;
+    }
+
+    if (found) {
+        if (index)
+            *index = idx;
+        if (para)
+            *para = i;
+        d->od->search.index = idx;
+        d->od->search.line = i;
+        optimSetSelection(i, idx, i, idx + expr.length());
+        QFontMetrics fm(Q3ScrollView::font());
+        int h = fm.lineSpacing();
+        int x = fm.width(d->od->lines[LOGOFFSET(i)].left(idx + expr.length())) + 4;
+        ensureVisible(x, i * h + h / 2, 1, h / 2 + 2);
+        repaintContents(); // could possibly be optimized
+    }
+    return found;
+}
+
+/*! \reimp */
+void Q3TextEdit::polishEvent(QEvent*)
+{
+    // this will ensure that the last line is visible if text have
+    // been added to the widget before it is shown
+    if (d->optimMode)
+        scrollToBottom();
+}
+
+/*!
+    Sets the maximum number of lines a Q3TextEdit can hold in \c
+    Qt::LogText mode to \a limit. If \a limit is -1 (the default), this
+    signifies an unlimited number of lines.
+
+    \warning Never use formatting tags that span more than one line
+    when the maximum log lines is set. When lines are removed from the
+    top of the buffer it could result in an unbalanced tag pair, i.e.
+    the left formatting tag is removed before the right one.
+ */
+void Q3TextEdit::setMaxLogLines(int limit)
+{
+    d->maxLogLines = limit;
+    if (d->maxLogLines < -1)
+        d->maxLogLines = -1;
+    if (d->maxLogLines == -1)
+        d->logOffset = 0;
+}
+
+/*!
+    Returns the maximum number of lines Q3TextEdit can hold in \c
+    Qt::LogText mode. By default the number of lines is unlimited, which
+    is signified by a value of -1.
+ */
+int Q3TextEdit::maxLogLines() const
+{
+    return d->maxLogLines;
+}
+
+/*!
+    Check if the number of lines in the buffer is limited, and uphold
+    that limit when appending new lines.
+ */
+void Q3TextEdit::optimCheckLimit(const QString& str)
+{
+    if (d->maxLogLines > -1 && d->maxLogLines <= d->od->numLines) {
+        // NB! Removing the top line in the buffer will potentially
+        // destroy the structure holding the formatting tags - if line
+        // spanning tags are used.
+        Q3TextEditOptimPrivate::Tag *t = d->od->tags, *tmp, *itr;
+        QList<Q3TextEditOptimPrivate::Tag *> lst;
+        while (t) {
+            t->line -= 1;
+            // unhook the ptr from the tag structure
+            if (((uint) LOGOFFSET(t->line) < (uint) d->logOffset &&
+                  (uint) LOGOFFSET(t->line) < (uint) LOGOFFSET(d->od->numLines) &&
+                  (uint) LOGOFFSET(d->od->numLines) > (uint) d->logOffset))
+            {
+                if (t->prev)
+                    t->prev->next = t->next;
+                if (t->next)
+                    t->next->prev = t->prev;
+                if (d->od->tags == t)
+                    d->od->tags = t->next;
+                if (d->od->lastTag == t) {
+                    if (t->prev)
+                        d->od->lastTag = t->prev;
+                    else
+                        d->od->lastTag = d->od->tags;
+                }
+                tmp = t;
+                t = t->next;
+                lst.append(tmp);
+                delete tmp;
+            } else {
+                t = t->next;
+            }
+        }
+        // Remove all references to the ptrs we just deleted
+        itr = d->od->tags;
+        while (itr) {
+            for (int i = 0; i < lst.size(); ++i) {
+                tmp = lst.at(i);
+                if (itr->parent == tmp)
+                    itr->parent = 0;
+                if (itr->leftTag == tmp)
+                    itr->leftTag = 0;
+            }
+            itr = itr->next;
+        }
+        // ...in the tag index as well
+        QMap<int, Q3TextEditOptimPrivate::Tag *>::Iterator idx;
+        if ((idx = d->od->tagIndex.find(d->logOffset)) != d->od->tagIndex.end())
+            d->od->tagIndex.erase(idx);
+
+        QMap<int,QString>::Iterator it;
+        if ((it = d->od->lines.find(d->logOffset)) != d->od->lines.end()) {
+            d->od->len -= (*it).length();
+            d->od->lines.erase(it);
+            d->od->numLines--;
+            d->logOffset = LOGOFFSET(1);
+        }
+    }
+    d->od->len += str.length();
+    d->od->lines[LOGOFFSET(d->od->numLines++)] = str;
+}
+
+#endif // QT_TEXTEDIT_OPTIMIZATION
+
+/*!
+    \property Q3TextEdit::autoFormatting
+    \brief the enabled set of auto formatting features
+
+    The value can be any combination of the values in the \c
+    AutoFormattingFlag enum.  The default is \c AutoAll. Choose \c AutoNone
+    to disable all automatic formatting.
+
+    Currently, the only automatic formatting feature provided is \c
+    AutoBulletList; future versions of Qt may offer more.
+*/
+
+void Q3TextEdit::setAutoFormatting(AutoFormatting features)
+{
+    d->autoFormatting = features;
+}
+
+Q3TextEdit::AutoFormatting Q3TextEdit::autoFormatting() const
+{
+    return d->autoFormatting;
+}
+
+/*!
+    Returns the QSyntaxHighlighter set on this Q3TextEdit. 0 is
+    returned if no syntax highlighter is set.
+ */
+Q3SyntaxHighlighter * Q3TextEdit::syntaxHighlighter() const
+{
+    if (document()->preProcessor())
+        return ((Q3SyntaxHighlighterInternal *) document()->preProcessor())->highlighter;
+    else
+        return 0;
+}
+
+QT_END_NAMESPACE
+
+#endif //QT_NO_TEXTEDIT