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qt3/src/widgets/qtextedit.cpp

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/****************************************************************************
**
** Implementation of the QTextEdit class
**
** Created : 990101
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of the widgets module of the Qt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free Qt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.QPL
** included in the packaging of this file. Licensees holding valid Qt
** Commercial licenses may use this file in accordance with the Qt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "qtextedit.h"
#ifndef QT_NO_TEXTEDIT
// Keep this position to avoid patch rejection
#ifndef QT_NO_IM
#include "qinputcontext.h"
#endif
#include "../kernel/qrichtext_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 "qlistbox.h"
#include "qvbox.h"
#include "qapplication.h"
#include "qclipboard.h"
#include "qcolordialog.h"
#include "qfontdialog.h"
#include "qstylesheet.h"
#include "qdragobject.h"
#include "qurl.h"
#include "qcursor.h"
#include "qregexp.h"
#include "qpopupmenu.h"
#include "qptrstack.h"
#include "qmetaobject.h"
#include "qtextbrowser.h"
#include <private/qucom_p.h>
#include "private/qsyntaxhighlighter_p.h"
#include <qguardedptr.h>
#ifndef QT_NO_ACCEL
#include <qkeysequence.h>
#define ACCEL_KEY(k) "\t" + QString(QKeySequence( Qt::CTRL | Qt::Key_ ## k ))
#else
#define ACCEL_KEY(k) "\t" + QString("Ctrl+" #k)
#endif
#ifdef QT_TEXTEDIT_OPTIMIZATION
#define LOGOFFSET(i) d->logOffset + i
#endif
struct QUndoRedoInfoPrivate
{
QTextString text;
};
class QTextEditPrivate
{
public:
QTextEditPrivate()
:preeditStart(-1),preeditLength(-1),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)QTextEdit::AutoAll )
{
for ( int i=0; i<7; i++ )
id[i] = 0;
}
int id[ 7 ];
int preeditStart;
int preeditLength;
bool composeMode() const { return ( preeditLength > 0 ); }
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
QTextEditOptimPrivate * od;
bool optimMode : 1;
int maxLogLines;
int logOffset;
#endif
uint autoFormatting;
};
#ifndef QT_NO_MIME
class QRichTextDrag : public QTextDrag
{
public:
QRichTextDrag( 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 QCString &mimetype,
const QCString &subtype );
static bool canDecode( QMimeSource* e );
private:
QString richTxt;
};
QRichTextDrag::QRichTextDrag( QWidget *dragSource, const char *name )
: QTextDrag( dragSource, name )
{
}
QByteArray QRichTextDrag::encodedData( const char *mime ) const
{
if ( qstrcmp( "application/x-qrichtext", mime ) == 0 ) {
return richTxt.utf8(); // #### perhaps we should use USC2 instead?
} else
return QTextDrag::encodedData( mime );
}
bool QRichTextDrag::decode( QMimeSource *e, QString &str, const QCString &mimetype,
const QCString &subtype )
{
if ( mimetype == "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
QCString subt = subtype;
return QTextDrag::decode( e, str, subt );
}
bool QRichTextDrag::canDecode( QMimeSource* e )
{
if ( e->provides( "application/x-qrichtext" ) )
return TRUE;
return QTextDrag::canDecode( e );
}
const char* QRichTextDrag::format( int i ) const
{
if ( QTextDrag::format( i ) )
return QTextDrag::format( i );
if ( QTextDrag::format( i-1 ) )
return "application/x-qrichtext";
return 0;
}
#endif
static bool block_set_alignment = FALSE;
/*!
\class QTextEdit qtextedit.h
\brief The QTextEdit widget provides a powerful single-page rich text editor.
\ingroup basic
\ingroup text
\mainclass
\tableofcontents
\section1 Introduction and Concepts
QTextEdit 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.
QTextEdit has four modes of operation:
\table
\header \i Mode \i Command \i Notes
\row \i Plain Text Editor \i setTextFormat(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(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. <sup>1.</sup>
\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(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 LogText mode\endlink for details.)
\endtable
<sup>1.</sup><small>A more complete API that supports setting
margins, images, etc., is planned for a later Qt release.</small>
QTextEdit 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 \c AutoText then setText() and
append() will try to determine whether the text they are given is
plain text or rich text. If you use \c RichText then setText() and
append() will assume that the text they are given is rich text.
insert() simply inserts the text it is given.
QTextEdit 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
QTextEdit can display images (using QMimeSourceFactory), lists and
tables. If the text is too large to view within the text edit's
viewport, scrollbars will appear. The text edit can load both
plain text and HTML files (a subset of HTML 3.2 and 4). The
rendering style and the set of valid tags are defined by a
styleSheet(). Custom tags can be created and placed in a custom
style sheet. Change the style sheet with \l{setStyleSheet()}; see
QStyleSheet for details. The images identified by image tags are
displayed if they can be interpreted using the text edit's
\l{QMimeSourceFactory}; see setMimeSourceFactory().
If you want a text browser with more navigation use QTextBrowser.
If you just need to display a small piece of rich text use QLabel
or QSimpleRichText.
If you create a new QTextEdit, and want to allow the user to edit
rich text, call setTextFormat(Qt::RichText) to ensure that the
text is treated as rich text. (Rich text uses HTML tags to set
text formatting attributes. See QStyleSheet for information on the
HTML tags that are supported.). If you don't call setTextFormat()
explicitly the text edit will guess from the text itself whether
it is rich text or plain text. 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 QTextEdit as a Display Widget
QTextEdit 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(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:
\code
QFile file( fileName ); // Read the text from a file
if ( file.open( IO_ReadOnly ) ) {
QTextStream stream( &file );
textEdit->setText( stream.read() );
}
QFile file( fileName ); // Write the text to a file
if ( file.open( IO_WriteOnly ) ) {
QTextStream stream( &file );
stream << textEdit->text();
textEdit->setModified( FALSE );
}
\endcode
By default the text edit wraps words at whitespace to fit within
the text edit widget. The setWordWrap() function is used to
specify the kind of word wrap you want, or \c NoWrap if you don't
want any wrapping. Call setWordWrap() to set a fixed pixel width
\c FixedPixelWidth, or character column (e.g. 80 column) \c
FixedColumnWidth with the pixels or columns specified with
setWrapColumnOrWidth(). If you use word wrap to the widget's width
\c WidgetWidth, you can specify whether to break on whitespace or
anywhere with setWrapPolicy().
The background color is set differently than other widgets, using
setPaper(). You specify a brush style which could be a plain color
or a complex pixmap.
Hypertext links are automatically underlined; this can be changed
with setLinkUnderline(). The tab stop width is set with
setTabStopWidth().
The zoomIn() and zoomOut() functions can be used to resize the
text by increasing (decreasing for zoomOut()) the point size used.
Images are not affected by the zoom functions.
The lines() function returns the number of lines in the text and
paragraphs() returns the number of paragraphs. The number of lines
within a particular paragraph is returned by linesOfParagraph().
The length of the entire text in characters is returned by
length().
You can scroll to an anchor in the text, e.g.
\c{<a name="anchor">} with scrollToAnchor(). The find() function
can be used to find and select a given string within the text.
A read-only QTextEdit provides the same functionality as the
(obsolete) QTextView. (QTextView is still supplied for
compatibility with old code.)
\section2 Read-only key bindings
When QTextEdit 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 UpArrow \i Move one line up
\row \i DownArrow \i Move one line down
\row \i LeftArrow \i Move one character left
\row \i RightArrow \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 QMimeSourceFactory uses to resolve
the locations of files and images. It is passed to the
mimeSourceFactory() when quering data. (See QTextEdit() and
\l{context()}.)
\target logtextmode
\section2 Using QTextEdit in LogText Mode
Setting the text format to \c LogText puts the widget in a special
mode which is optimized for very large texts. Editing, word wrap,
and rich text support are disabled in this mode (the widget is
explicitly made read-only). 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:
\code
This is <font color=red>red</font> while <b>this</b> is <font color=blue>blue</font>.
<font color=green><font color=yellow>Yellow,</font> and <u>green</u>.
\endcode
Stylesheets can also be used in LogText mode. To create and use a
custom tag, you could do the following:
\code
QTextEdit * log = new QTextEdit( this );
log->setTextFormat( Qt::LogText );
QStyleSheetItem * item = new QStyleSheetItem( log->styleSheet(), "mytag" );
item->setColor( "red" );
item->setFontWeight( QFont::Bold );
item->setFontUnderline( TRUE );
log->append( "This is a <mytag>custom tag</mytag>!" );
\endcode
Note that only the color, bold, underline and italic attributes of
a QStyleSheetItem is used in LogText mode.
Note that you can use setMaxLogLines() to limit the number of
lines the widget can hold in 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 QTextEdit as an Editor
All the information about using QTextEdit 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(). QTextEdit 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.
QTextEdit provides command-based undo and redo. To set the depth
of the command history use setUndoDepth() which defaults to 100
steps. To undo or redo the last operation call undo() or redo().
The signals undoAvailable() and redoAvailable() indicate whether
the undo and redo operations can be executed.
The indent() function is used to reindent a paragraph. It is
useful for code editors, for example in \link designer-manual.book
Qt Designer\endlink's code editor \e{Ctrl+I} invokes the indent()
function.
\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 LeftArrow \i Move the cursor one character left
\row \i Ctrl+LeftArrow \i Move the cursor one word left
\row \i RightArrow \i Move the cursor one character right
\row \i Ctrl+RightArrow \i Move the cursor one word right
\row \i UpArrow \i Move the cursor one line up
\row \i Ctrl+UpArrow \i Move the cursor one word up
\row \i DownArrow \i Move the cursor one line down
\row \i Ctrl+Down Arrow \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 Arrow}
will select the character to the right, and \e{Shift+Ctrl+Right
Arrow} 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 QTextEdit::AutoFormatting
\value AutoNone Do not perform any automatic formatting
\value AutoBulletList Only automatically format bulletted lists
\value AutoAll Apply all available autoformatting
*/
/*!
\enum QTextEdit::KeyboardAction
This enum is used by doKeyboardAction() to specify which action
should be executed:
\value ActionBackspace Delete the character to the left of the
cursor.
\value ActionDelete Delete the character to the right of the
cursor.
\value ActionReturn Split the paragraph at the cursor position.
\value ActionKill If the cursor is not at the end of the
paragraph, delete the text from the cursor position until the end
of the paragraph. If the cursor is at the end of the paragraph,
delete the hard line break at the end of the paragraph: this will
cause this paragraph to be joined with the following paragraph.
\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 QTextEdit::VerticalAlignment
This enum is used to set the vertical alignment of the text.
\value AlignNormal Normal alignment
\value AlignSuperScript Superscript
\value AlignSubScript Subscript
*/
/*!
\enum QTextEdit::TextInsertionFlags
\internal
\value RedoIndentation
\value CheckNewLines
\value RemoveSelected
*/
/*!
\fn void QTextEdit::copyAvailable(bool yes)
This signal is emitted when text is selected or de-selected in the
text edit.
When text is selected this signal will be emitted with \a yes set
to TRUE. If no text has been selected or if the selected text is
de-selected this signal is emitted with \a yes set to FALSE.
If \a yes is TRUE then copy() can be used to copy the selection to
the clipboard. If \a yes is FALSE then copy() does nothing.
\sa selectionChanged()
*/
/*!
\fn void QTextEdit::textChanged()
This signal is emitted whenever the text in the text edit changes.
\sa setText() append()
*/
/*!
\fn void QTextEdit::selectionChanged()
This signal is emitted whenever the selection changes.
\sa setSelection() copyAvailable()
*/
/*! \fn QTextDocument *QTextEdit::document() const
\internal
This function returns the QTextDocument which is used by the text
edit.
*/
/*! \fn void QTextEdit::setDocument( QTextDocument *doc )
\internal
This function sets the QTextDocument which should be used by the text
edit to \a doc. This can be used, for example, if you want to
display a document using multiple views. You would create a
QTextDocument and set it to the text edits which should display it.
You would need to connect to the textChanged() and
selectionChanged() signals of all the text edits and update them all
accordingly (preferably with a slight delay for efficiency reasons).
*/
/*!
\enum QTextEdit::CursorAction
This enum is used by moveCursor() to specify in which direction
the cursor should be moved:
\value MoveBackward Moves the cursor one character backward
\value MoveWordBackward Moves the cursor one word backward
\value MoveForward Moves the cursor one character forward
\value MoveWordForward Moves the cursor one word forward
\value MoveUp Moves the cursor up one line
\value MoveDown Moves the cursor down one line
\value MoveLineStart Moves the cursor to the beginning of the line
\value MoveLineEnd Moves the cursor to the end of the line
\value MoveHome Moves the cursor to the beginning of the document
\value MoveEnd Moves the cursor to the end of the document
\value MovePgUp Moves the cursor one viewport page up
\value MovePgDown Moves the cursor one viewport page down
*/
/*!
\enum Qt::AnchorAttribute
An anchor has one or more of the following attributes:
\value AnchorName the name attribute of the anchor. This attribute is
used when scrolling to an anchor in the document.
\value AnchorHref the href attribute of the anchor. This attribute is
used when a link is clicked to determine what content to load.
*/
/*!
\property QTextEdit::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 QTextEdit::setCurrentFont( const QFont &f )
Sets the font of the current format to \a f.
If the widget is in \c LogText mode this function will do
nothing. Use setFont() instead.
\sa currentFont() setPointSize() setFamily()
*/
/*!
\property QTextEdit::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 QTextEdit::undoAvailable( bool yes )
This signal is emitted when the availability of undo changes. If
\a yes is TRUE, then undo() will work until undoAvailable( FALSE )
is next emitted.
\sa undo() undoDepth()
*/
/*!
\fn void QTextEdit::modificationChanged( bool m )
This signal is emitted when the modification 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 QTextEdit::redoAvailable( bool yes )
This signal is emitted when the availability of redo changes. If
\a yes is TRUE, then redo() will work until redoAvailable( FALSE )
is next emitted.
\sa redo() undoDepth()
*/
/*!
\fn void QTextEdit::currentFontChanged( const QFont &f )
This signal is emitted if the font of the current format has
changed.
The new font is \a f.
\sa setCurrentFont()
*/
/*!
\fn void QTextEdit::currentColorChanged( const QColor &c )
This signal is emitted if the color of the current format has
changed.
The new color is \a c.
\sa setColor()
*/
/*!
\fn void QTextEdit::currentVerticalAlignmentChanged( VerticalAlignment a )
This signal is emitted if the vertical alignment of the current
format has changed.
The new vertical alignment is \a a.
\sa setVerticalAlignment()
*/
/*!
\fn void QTextEdit::currentAlignmentChanged( int a )
This signal is emitted if the alignment of the current paragraph
has changed.
The new alignment is \a a.
\sa setAlignment()
*/
/*!
\fn void QTextEdit::cursorPositionChanged( QTextCursor *c )
\internal
*/
/*!
\fn void QTextEdit::cursorPositionChanged( int para, int pos )
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 QTextEdit::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 QTextEdit::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 QTextEdit::returnPressed()
This signal is emitted if the user pressed the Return or the Enter
key.
*/
/*!
\fn QTextCursor *QTextEdit::textCursor() const
Returns the text edit's text cursor.
\warning QTextCursor is not in the public API, but in special
circumstances you might wish to use it.
*/
/*!
Constructs an empty QTextEdit called \a name, with parent \a
parent.
*/
QTextEdit::QTextEdit( QWidget *parent, const char *name )
: QScrollView( parent, name, WStaticContents | WNoAutoErase ),
doc( new QTextDocument( 0 ) ), undoRedoInfo( doc )
{
init();
}
/*!
Constructs a QTextEdit 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 QMimeSourceFactory
uses to resolve the locations of files and images. It is passed to
the mimeSourceFactory() when quering data.
For example if the text contains an image tag,
\c{<img src="image.png">}, and the context is "path/to/look/in", the
QMimeSourceFactory will try to load the image from
"path/to/look/in/image.png". If the tag was
\c{<img src="/image.png">}, the context will not be used (because
QMimeSourceFactory recognizes that we have used an absolute path)
and will try to load "/image.png". The context is applied in exactly
the same way to \e hrefs, for example,
\c{<a href="target.html">Target</a>}, would resolve to
"path/to/look/in/target.html".
*/
QTextEdit::QTextEdit( const QString& text, const QString& context,
QWidget *parent, const char *name)
: QScrollView( parent, name, WStaticContents | WNoAutoErase ),
doc( new QTextDocument( 0 ) ), undoRedoInfo( doc )
{
init();
setText( text, context );
}
/*!
\reimp
*/
QTextEdit::~QTextEdit()
{
delete undoRedoInfo.d;
undoRedoInfo.d = 0;
delete cursor;
delete doc;
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
delete d->od;
#endif
delete d;
}
void QTextEdit::init()
{
d = new QTextEditPrivate;
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;
onLink = QString::null;
d->onName = QString::null;
overWrite = FALSE;
wrapMode = WidgetWidth;
wrapWidth = -1;
wPolicy = AtWhiteSpace;
inDnD = FALSE;
doc->setFormatter( new QTextFormatterBreakWords );
doc->formatCollection()->defaultFormat()->setFont( QScrollView::font() );
doc->formatCollection()->defaultFormat()->setColor( colorGroup().color( QColorGroup::Text ) );
currentFormat = doc->formatCollection()->defaultFormat();
currentAlignment = Qt::AlignAuto;
setBackgroundMode( PaletteBase );
viewport()->setBackgroundMode( PaletteBase );
viewport()->setAcceptDrops( TRUE );
resizeContents( 0, doc->lastParagraph() ?
( doc->lastParagraph()->paragId() + 1 ) * doc->formatCollection()->defaultFormat()->height() : 0 );
setKeyCompression( TRUE );
viewport()->setMouseTracking( TRUE );
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
cursor = new QTextCursor( doc );
formatTimer = new QTimer( this );
connect( formatTimer, SIGNAL( timeout() ),
this, SLOT( formatMore() ) );
lastFormatted = doc->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( WheelFocus );
setInputMethodEnabled( TRUE );
viewport()->installEventFilter( this );
connect( this, SIGNAL(horizontalSliderReleased()), this, SLOT(sliderReleased()) );
connect( this, SIGNAL(verticalSliderReleased()), this, SLOT(sliderReleased()) );
installEventFilter( this );
}
void QTextEdit::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 = hasFocus() || viewport()->hasFocus();
if (( hasSelectedText() && !style().styleHint( QStyle::SH_BlinkCursorWhenTextSelected ) ) ||
isReadOnly() || !cursorVisible || doc->hasSelection( QTextDocument::IMSelectionText ))
drawCur = FALSE;
QColorGroup g = colorGroup();
const QColorGroup::ColorRole backRole = QPalette::backgroundRoleFromMode(backgroundMode());
if ( doc->paper() )
g.setBrush( backRole, *doc->paper() );
if ( contentsY() < doc->y() ) {
p->fillRect( contentsX(), contentsY(), visibleWidth(), doc->y(),
g.brush( backRole ) );
}
if ( drawAll && doc->width() - contentsX() < cx + cw ) {
p->fillRect( doc->width() - contentsX(), cy, cx + cw - doc->width() + contentsX(), ch,
g.brush( backRole ) );
}
p->setBrushOrigin( -contentsX(), -contentsY() );
lastFormatted = doc->draw( p, cx, cy, cw, ch, g, !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(), g.brush( backRole ) );
}
/*!
\reimp
*/
void QTextEdit::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( foregroundColor() );
if ( document()->isPageBreakEnabled() && ( v = document()->flow()->pageSize() ) > 0 ) {
int l = int(cy / v) * v;
while ( l < cy + ch ) {
p->drawLine( cx, l, cx + cw - 1, l );
l += v;
}
}
// This invocation is required to follow dragging of active window
// by the showed candidate window.
updateMicroFocusHint();
}
/*!
\reimp
*/
void QTextEdit::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, colorGroup().background() );
}
}
/*!
\reimp
*/
bool QTextEdit::event( QEvent *e )
{
if ( e->type() == QEvent::AccelOverride && !isReadOnly() ) {
QKeyEvent* ke = (QKeyEvent*) e;
switch(ke->state()) {
case NoButton:
case Keypad:
case ShiftButton:
if ( ke->key() < Key_Escape ) {
ke->accept();
} else {
switch ( ke->key() ) {
case Key_Return:
case Key_Enter:
case Key_Delete:
case Key_Home:
case Key_End:
case Key_Backspace:
case Key_Left:
case Key_Right:
ke->accept();
default:
break;
}
}
break;
case ControlButton:
case ControlButton|ShiftButton:
case ControlButton|Keypad:
case ControlButton|ShiftButton|Keypad:
switch ( ke->key() ) {
case Key_Tab:
case Key_Backtab:
ke->ignore();
break;
// Those are too frequently used for application functionality
/* case Key_A:
case Key_B:
case Key_D:
case Key_E:
case Key_F:
case Key_H:
case Key_I:
case Key_K:
case Key_N:
case Key_P:
case Key_T:
*/
case Key_C:
case Key_V:
case Key_X:
case Key_Y:
case Key_Z:
case Key_Left:
case Key_Right:
case Key_Up:
case Key_Down:
case Key_Home:
case Key_End:
#if defined (Q_WS_WIN)
case Key_Insert:
case Key_Delete:
#endif
ke->accept();
default:
break;
}
break;
default:
switch ( ke->key() ) {
#if defined (Q_WS_WIN)
case 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 = QString::null;
}
}
return QWidget::event( e );
}
/*!
Processes the key event, \a e. By default key events are used to
provide keyboard navigation and text editing.
*/
void QTextEdit::keyPressEvent( QKeyEvent *e )
{
changeIntervalTimer->stop();
interval = 10;
bool unknownKey = FALSE;
if ( isReadOnly() ) {
if ( !handleReadOnlyKeyEvent( e ) )
QScrollView::keyPressEvent( e );
changeIntervalTimer->start( 100, TRUE );
return;
}
bool selChanged = FALSE;
for ( int i = 1; i < doc->numSelections(); ++i ) // start with 1 as we don't want to remove the Standard-Selection
selChanged = doc->removeSelection( i ) || selChanged;
if ( selChanged ) {
cursor->paragraph()->document()->nextDoubleBuffered = TRUE;
repaintChanged();
}
bool clearUndoRedoInfo = TRUE;
switch ( e->key() ) {
case Key_Left:
case 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() == Key_Right) )
a = e->state() & ControlButton ? MoveWordBackward : MoveBackward;
else
a = e->state() & ControlButton ? MoveWordForward : MoveForward;
moveCursor( a, e->state() & ShiftButton );
break;
}
case Key_Up:
moveCursor( e->state() & ControlButton ? MovePgUp : MoveUp, e->state() & ShiftButton );
break;
case Key_Down:
moveCursor( e->state() & ControlButton ? MovePgDown : MoveDown, e->state() & ShiftButton );
break;
case Key_Home:
moveCursor( e->state() & ControlButton ? MoveHome : MoveLineStart, e->state() & ShiftButton );
break;
case Key_End:
moveCursor( e->state() & ControlButton ? MoveEnd : MoveLineEnd, e->state() & ShiftButton );
break;
case Key_Prior:
moveCursor( MovePgUp, e->state() & ShiftButton );
break;
case Key_Next:
moveCursor( MovePgDown, e->state() & ShiftButton );
break;
case Key_Return: case Key_Enter:
if ( doc->hasSelection( QTextDocument::Standard, FALSE ) )
removeSelectedText();
if ( textFormat() == Qt::RichText && ( e->state() & ControlButton ) ) {
// Ctrl-Enter inserts a line break in rich text mode
insert( QString( QChar( 0x2028) ), TRUE, FALSE );
} else {
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
clearUndoRedoInfo = FALSE;
doKeyboardAction( ActionReturn );
emit returnPressed();
}
break;
case Key_Delete:
#if defined (Q_WS_WIN)
if ( e->state() & ShiftButton ) {
cut();
break;
} else
#endif
if ( doc->hasSelection( QTextDocument::Standard, TRUE ) ) {
removeSelectedText();
break;
}
doKeyboardAction( e->state() & ControlButton ? ActionWordDelete
: ActionDelete );
clearUndoRedoInfo = FALSE;
break;
case Key_Insert:
if ( e->state() & ShiftButton )
paste();
#if defined (Q_WS_WIN)
else if ( e->state() & ControlButton )
copy();
#endif
else
setOverwriteMode( !isOverwriteMode() );
break;
case Key_Backspace:
#if defined (Q_WS_WIN)
if ( e->state() & AltButton ) {
if (e->state() & ControlButton ) {
break;
} else if ( e->state() & ShiftButton ) {
redo();
break;
} else {
undo();
break;
}
} else
#endif
if ( doc->hasSelection( QTextDocument::Standard, TRUE ) ) {
removeSelectedText();
break;
}
doKeyboardAction( e->state() & ControlButton ? ActionWordBackspace
: ActionBackspace );
clearUndoRedoInfo = FALSE;
break;
case Key_F16: // Copy key on Sun keyboards
copy();
break;
case Key_F18: // Paste key on Sun keyboards
paste();
break;
case Key_F20: // Cut key on Sun keyboards
cut();
break;
case Key_Direction_L:
if ( doc->textFormat() == Qt::PlainText ) {
// change the whole doc
QTextParagraph *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 Key_Direction_R:
if ( doc->textFormat() == Qt::PlainText ) {
// change the whole doc
QTextParagraph *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: {
if ( e->text().length() &&
( !( e->state() & ControlButton ) &&
#ifndef Q_OS_MACX
!( e->state() & AltButton ) &&
#endif
!( e->state() & MetaButton ) ||
( ( (e->state()&ControlButton) | AltButton ) == (ControlButton|AltButton) ) ) &&
( !e->ascii() || e->ascii() >= 32 || e->text() == "\t" ) ) {
clearUndoRedoInfo = FALSE;
if ( e->key() == 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 = QTextStyleCommand::readStyleInformation( doc, undoRedoInfo.id, undoRedoInfo.eid );
cursor->paragraph()->setListDepth( cursor->paragraph()->listDepth() +1 );
clearUndoRedo();
drawCursor( FALSE );
repaintChanged();
drawCursor( TRUE );
break;
}
} else if ( e->key() == Key_BackTab ) {
if ( d->tabChangesFocus ) {
e->ignore();
break;
}
}
if ( ( autoFormatting() & AutoBulletList ) &&
textFormat() == Qt::RichText && cursor->index() == 0
&& !cursor->paragraph()->isListItem()
&& ( e->text()[0] == '-' || e->text()[0] == '*' ) ) {
clearUndoRedo();
undoRedoInfo.type = UndoRedoInfo::Style;
undoRedoInfo.id = cursor->paragraph()->paragId();
undoRedoInfo.eid = undoRedoInfo.id;
undoRedoInfo.styleInformation = QTextStyleCommand::readStyleInformation( doc, undoRedoInfo.id, undoRedoInfo.eid );
setParagType( QStyleSheetItem::DisplayListItem, QStyleSheetItem::ListDisc );
clearUndoRedo();
drawCursor( FALSE );
repaintChanged();
drawCursor( TRUE );
break;
}
if (overWrite && !cursor->atParagEnd() && !doc->hasSelection(QTextDocument::Standard)) {
doKeyboardAction(ActionDelete);
clearUndoRedoInfo = FALSE;
}
QString t = e->text();
#ifdef Q_WS_X11
extern bool qt_hebrew_keyboard_hack;
if ( qt_hebrew_keyboard_hack ) {
// the X11 keyboard layout is broken and does not reverse
// braces correctly. This is a hack to get halfway correct
// behaviour
QTextParagraph *p = cursor->paragraph();
if ( p && p->string() && p->string()->isRightToLeft() ) {
QChar *c = (QChar *)t.unicode();
int l = t.length();
while( l-- ) {
if ( c->mirrored() )
*c = c->mirroredChar();
c++;
}
}
}
#endif
insert( t, TRUE, FALSE );
break;
} else if ( e->state() & ControlButton ) {
switch ( e->key() ) {
case Key_C: case Key_F16: // Copy key on Sun keyboards
copy();
break;
case Key_V:
paste();
break;
case Key_X:
cut();
break;
case Key_I: case Key_T: case Key_Tab:
if ( !d->tabChangesFocus )
indent();
break;
case Key_A:
#if defined(Q_WS_X11)
moveCursor( MoveLineStart, e->state() & ShiftButton );
#else
selectAll( TRUE );
#endif
break;
case Key_B:
moveCursor( MoveBackward, e->state() & ShiftButton );
break;
case Key_F:
moveCursor( MoveForward, e->state() & ShiftButton );
break;
case Key_D:
if ( doc->hasSelection( QTextDocument::Standard ) ) {
removeSelectedText();
break;
}
doKeyboardAction( ActionDelete );
clearUndoRedoInfo = FALSE;
break;
case Key_H:
if ( doc->hasSelection( QTextDocument::Standard ) ) {
removeSelectedText();
break;
}
if ( !cursor->paragraph()->prev() &&
cursor->atParagStart() )
break;
doKeyboardAction( ActionBackspace );
clearUndoRedoInfo = FALSE;
break;
case Key_E:
moveCursor( MoveLineEnd, e->state() & ShiftButton );
break;
case Key_N:
moveCursor( MoveDown, e->state() & ShiftButton );
break;
case Key_P:
moveCursor( MoveUp, e->state() & ShiftButton );
break;
case Key_Z:
if(e->state() & ShiftButton)
redo();
else
undo();
break;
case Key_Y:
redo();
break;
case Key_K:
doKeyboardAction( ActionKill );
break;
#if defined(Q_WS_WIN)
case Key_Insert:
copy();
break;
case 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();
}
/*!
This function is not intended as polymorphic usage. Just a shared code
fragment that calls QWidget::sendMouseEventToInputContext() easily for this
class.
*/
bool QTextEdit::sendMouseEventToInputContext( QMouseEvent *e )
{
#ifndef QT_NO_IM
if ( d->composeMode() ) {
QTextCursor c( doc );
if ( c.place( e->pos(), doc->firstParagraph(), FALSE, FALSE, FALSE ) ) {
int mousePos = c.index() - d->preeditStart;
if ( cursor->globalY() == c.globalY() &&
mousePos >= 0 && mousePos < d->preeditLength ) {
QWidget::sendMouseEventToInputContext( mousePos, e->type(),
e->button(), e->state() );
}
} else if ( e->type() != QEvent::MouseMove ) {
// send button events on out of preedit
QWidget::sendMouseEventToInputContext( -1, e->type(),
e->button(), e->state() );
}
return TRUE;
}
#endif
return FALSE;
}
/*!
\reimp
*/
void QTextEdit::imStartEvent( QIMEvent *e )
{
if ( isReadOnly() ) {
e->ignore();
return;
}
if ( hasSelectedText() )
removeSelectedText();
d->preeditStart = cursor->index();
clearUndoRedo();
undoRedoInfo.type = UndoRedoInfo::IME;
}
/*!
\reimp
*/
void QTextEdit::imComposeEvent( QIMEvent *e )
{
if ( isReadOnly() ) {
e->ignore();
return;
}
doc->removeSelection( QTextDocument::IMCompositionText );
doc->removeSelection( QTextDocument::IMSelectionText );
if ( d->composeMode() && cursor->paragraph() )
cursor->paragraph()->remove( d->preeditStart, d->preeditLength );
cursor->setIndex( d->preeditStart );
d->preeditLength = e->text().length();
int sellen = e->selectionLength();
uint insertionFlags = CheckNewLines | RemoveSelected | AsIMCompositionText;
if ( sellen > 0 ) {
insertionFlags |= WithIMSelection;
}
insert( e->text(), insertionFlags );
// insert can trigger an imEnd event as it emits a textChanged signal, so better
// be careful
if(d->preeditStart != -1) {
cursor->setIndex( d->preeditStart + d->preeditLength );
QTextCursor c = *cursor;
cursor->setIndex( d->preeditStart );
doc->setSelectionStart( QTextDocument::IMCompositionText, *cursor );
doc->setSelectionEnd( QTextDocument::IMCompositionText, c );
cursor->setIndex( d->preeditStart + e->cursorPos() );
if ( sellen > 0 ) {
cursor->setIndex( d->preeditStart + e->cursorPos() + sellen );
c = *cursor;
cursor->setIndex( d->preeditStart + e->cursorPos() );
doc->setSelectionStart( QTextDocument::IMSelectionText, *cursor );
doc->setSelectionEnd( QTextDocument::IMSelectionText, c );
#if 0
// Disabled for Asian input method that shows candidate
// window. This behavior is same as Qt/E 2.3.7 which supports
// Asian input methods. Asian input methods need start point
// of IM selection text to place candidate window as adjacent
// to the selection text.
cursor->setIndex( d->preeditStart + d->preeditLength );
#endif
}
}
updateMicroFocusHint();
repaintChanged();
}
/*!
\reimp
*/
void QTextEdit::imEndEvent( QIMEvent *e )
{
if ( isReadOnly() ) {
e->ignore();
return;
}
doc->removeSelection( QTextDocument::IMCompositionText );
doc->removeSelection( QTextDocument::IMSelectionText );
if (undoRedoInfo.type == UndoRedoInfo::IME)
undoRedoInfo.type = UndoRedoInfo::Invalid;
if ( d->composeMode() && cursor->paragraph() )
cursor->paragraph()->remove( d->preeditStart, d->preeditLength );
if ( d->preeditStart >= 0 ) {
cursor->setIndex( d->preeditStart );
//TODO: Qt 4 we should use the new virtual insert function
insert( e->text(), FALSE );
}
d->preeditStart = d->preeditLength = -1;
repaintChanged();
}
static bool qtextedit_ignore_readonly = FALSE;
/*!
Executes keyboard action \a action. This is normally called by a
key event handler.
*/
void QTextEdit::doKeyboardAction( KeyboardAction action )
{
if ( isReadOnly() && !qtextedit_ignore_readonly )
return;
if ( cursor->nestedDepth() != 0 ) // #### for 3.0, disable editing of tables as this is not advanced enough
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 = QString::null;
}
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( QTextDocument::Temp, *cursor );
if ( action == ActionWordDelete && !cursor->atParagEnd() ) {
cursor->gotoNextWord();
} else {
cursor->gotoNextLetter();
}
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
removeSelectedText( QTextDocument::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 = QTextStyleCommand::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 = QString::null;
}
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( QTextDocument::Temp, *cursor );
if ( action == ActionWordBackspace && !cursor->atParagStart() ) {
cursor->gotoPreviousWord();
} else {
cursor->gotoPreviousLetter();
}
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
removeSelectedText( QTextDocument::Temp );
}
break;
case ActionReturn:
if ( undoEnabled ) {
checkUndoRedoInfo( UndoRedoInfo::Return );
if ( !undoRedoInfo.valid() ) {
undoRedoInfo.id = cursor->paragraph()->paragId();
undoRedoInfo.index = cursor->index();
undoRedoInfo.d->text = QString::null;
}
undoRedoInfo.d->text += "\n";
}
cursor->splitAndInsertEmptyParagraph();
if ( cursor->paragraph()->prev() ) {
lastFormatted = cursor->paragraph()->prev();
lastFormatted->invalidate( 0 );
}
doUpdateCurrentFormat = FALSE;
break;
case ActionKill:
clearUndoRedo();
doc->setSelectionStart( QTextDocument::Temp, *cursor );
if ( cursor->atParagEnd() )
cursor->gotoNextLetter();
else
cursor->setIndex( cursor->paragraph()->length() - 1 );
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
removeSelectedText( QTextDocument::Temp );
break;
}
formatMore();
repaintChanged();
ensureCursorVisible();
drawCursor( TRUE );
updateMicroFocusHint();
if ( doUpdateCurrentFormat )
updateCurrentFormat();
setModified();
emit textChanged();
}
void QTextEdit::readFormats( QTextCursor &c1, QTextCursor &c2, QTextString &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 += "\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 ( QTextParagraph *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 QTextEdit::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 QTextEdit::removeSelectedText( int selNum )
{
if(selNum != 0)
resetInputContext();
QTextCursor c1 = doc->selectionStartCursor( selNum );
c1.restoreState();
QTextCursor 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 = QString::null;
}
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( FALSE );
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(), TRUE );
#endif
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
updateMicroFocusHint();
} else {
delete cursor;
cursor = new QTextCursor( doc );
drawCursor( TRUE );
repaintContents( TRUE );
}
setModified();
emit textChanged();
emit selectionChanged();
emit copyAvailable( doc->hasSelection( QTextDocument::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 QTextEdit::moveCursor( CursorAction action, bool select )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return;
#endif
#ifdef Q_WS_MACX
QTextCursor c1 = *cursor;
QTextCursor c2;
#endif
drawCursor( FALSE );
if ( select ) {
if ( !doc->hasSelection( QTextDocument::Standard ) )
doc->setSelectionStart( QTextDocument::Standard, *cursor );
moveCursor( action );
#ifdef Q_WS_MACX
c2 = *cursor;
if (c1 == c2)
if (action == MoveDown || action == MovePgDown)
moveCursor( MoveEnd );
else if (action == MoveUp || action == MovePgUp)
moveCursor( MoveHome );
#endif
if ( doc->setSelectionEnd( QTextDocument::Standard, *cursor ) ) {
cursor->paragraph()->document()->nextDoubleBuffered = TRUE;
repaintChanged();
} else {
drawCursor( TRUE );
}
ensureCursorVisible();
emit selectionChanged();
emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
} else {
#ifdef Q_WS_MACX
QTextCursor cStart = doc->selectionStartCursor( QTextDocument::Standard );
QTextCursor cEnd = doc->selectionEndCursor( QTextDocument::Standard );
bool redraw = doc->removeSelection( QTextDocument::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( QTextDocument::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() ? arrowCursor : ibeamCursor );
#endif
}
if ( redraw ) {
emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
emit selectionChanged();
}
}
drawCursor( TRUE );
updateCurrentFormat();
updateMicroFocusHint();
}
/*!
\overload
*/
void QTextEdit::moveCursor( 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;
}
updateMicroFocusHint();
updateCurrentFormat();
}
/*!
\reimp
*/
void QTextEdit::resizeEvent( QResizeEvent *e )
{
QScrollView::resizeEvent( e );
if ( doc->visibleWidth() == 0 )
doResize();
}
/*!
\reimp
*/
void QTextEdit::viewportResizeEvent( QResizeEvent *e )
{
QScrollView::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 QTextEdit::ensureCursorVisible()
{
// Not visible or the user is draging the window, so don't position to caret yet
if ( !isUpdatesEnabled() || !isVisible() || isHorizontalSliderPressed() || isVerticalSliderPressed() ) {
d->ensureCursorVisibleInShowEvent = TRUE;
return;
}
sync();
QTextStringChar *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 QTextEdit::sliderReleased()
{
if ( d->ensureCursorVisibleInShowEvent && isVisible() ) {
d->ensureCursorVisibleInShowEvent = FALSE;
ensureCursorVisible();
}
}
/*!
\internal
*/
void QTextEdit::drawCursor( bool visible )
{
if ( !isUpdatesEnabled() ||
!viewport()->isUpdatesEnabled() ||
!cursor->paragraph() ||
!cursor->paragraph()->isValid() ||
( !style().styleHint( QStyle::SH_BlinkCursorWhenTextSelected ) &&
( d->optimMode ? optimHasSelection() : doc->hasSelection( QTextDocument::Standard, TRUE ))) ||
( visible && !hasFocus() && !viewport()->hasFocus() && !inDnD ) ||
doc->hasSelection( QTextDocument::IMSelectionText ) ||
isReadOnly() )
return;
// Asian users regard selection text as cursor on candidate
// selection phase of input method, so ordinary cursor should be
// invisible if IM selection text exists.
if ( doc->hasSelection( QTextDocument::IMSelectionText ) ) {
visible = FALSE;
}
QPainter p( viewport() );
QRect r( cursor->topParagraph()->rect() );
cursor->paragraph()->setChanged( TRUE );
p.translate( -contentsX() + cursor->totalOffsetX(), -contentsY() + cursor->totalOffsetY() );
QPixmap *pix = 0;
QColorGroup cg( colorGroup() );
const QColorGroup::ColorRole backRole = QPalette::backgroundRoleFromMode(backgroundMode());
if ( cursor->paragraph()->background() )
cg.setBrush( backRole, *cursor->paragraph()->background() );
else if ( doc->paper() )
cg.setBrush( backRole, *doc->paper() );
p.setBrushOrigin( -contentsX(), -contentsY() );
cursor->paragraph()->document()->nextDoubleBuffered = TRUE;
if ( !cursor->nestedDepth() ) {
int h = cursor->paragraph()->lineHeightOfChar( cursor->index() );
int dist = 5;
if ( ( cursor->paragraph()->alignment() & Qt::AlignJustify ) == Qt::AlignJustify )
dist = 50;
int x = r.x() - cursor->totalOffsetX() + cursor->x() - dist;
x = QMAX( x, 0 );
p.setClipRect( QRect( x - contentsX(),
r.y() - cursor->totalOffsetY() + cursor->y() - contentsY(), 2 * dist, h ) );
doc->drawParagraph( &p, cursor->paragraph(), x,
r.y() - cursor->totalOffsetY() + cursor->y(), 2 * dist, h, pix, cg, visible, cursor );
} else {
doc->drawParagraph( &p, cursor->paragraph(), r.x() - cursor->totalOffsetX(),
r.y() - cursor->totalOffsetY(), r.width(), r.height(),
pix, cg, visible, cursor );
}
cursorVisible = visible;
}
enum {
IdUndo = 0,
IdRedo = 1,
IdCut = 2,
IdCopy = 3,
IdPaste = 4,
IdClear = 5,
IdSelectAll = 6
};
/*!
\reimp
*/
#ifndef QT_NO_WHEELEVENT
void QTextEdit::contentsWheelEvent( QWheelEvent *e )
{
if ( isReadOnly() ) {
if ( e->state() & ControlButton ) {
if ( e->delta() > 0 )
zoomOut();
else if ( e->delta() < 0 )
zoomIn();
return;
}
}
QScrollView::contentsWheelEvent( e );
}
#endif
/*!
\reimp
*/
void QTextEdit::contentsMousePressEvent( QMouseEvent *e )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimMousePressEvent( e );
return;
}
#endif
if ( sendMouseEventToInputContext( e ) )
return;
if ( d->trippleClickTimer->isActive() &&
( e->globalPos() - d->trippleClickPoint ).manhattanLength() <
QApplication::startDragDistance() ) {
QTextCursor c1 = *cursor;
QTextCursor c2 = *cursor;
c1.gotoLineStart();
c2.gotoLineEnd();
doc->setSelectionStart( QTextDocument::Standard, c1 );
doc->setSelectionEnd( QTextDocument::Standard, c2 );
*cursor = c2;
repaintChanged();
mousePressed = TRUE;
return;
}
clearUndoRedo();
QTextCursor oldCursor = *cursor;
QTextCursor c = *cursor;
mousePos = e->pos();
mightStartDrag = FALSE;
pressedLink = QString::null;
d->pressedName = QString::null;
if ( e->button() == LeftButton ) {
mousePressed = TRUE;
drawCursor( FALSE );
placeCursor( e->pos() );
ensureCursorVisible();
if ( isReadOnly() && linksEnabled() ) {
QTextCursor 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( QTextDocument::Standard, e->pos() ) ) {
mightStartDrag = TRUE;
drawCursor( TRUE );
dragStartTimer->start( QApplication::startDragTime(), TRUE );
dragStartPos = e->pos();
return;
}
#endif
bool redraw = FALSE;
if ( doc->hasSelection( QTextDocument::Standard ) ) {
if ( !( e->state() & ShiftButton ) ) {
redraw = doc->removeSelection( QTextDocument::Standard );
doc->setSelectionStart( QTextDocument::Standard, *cursor );
} else {
redraw = doc->setSelectionEnd( QTextDocument::Standard, *cursor ) || redraw;
}
} else {
if ( isReadOnly() || !( e->state() & ShiftButton ) ) {
doc->setSelectionStart( QTextDocument::Standard, *cursor );
} else {
doc->setSelectionStart( QTextDocument::Standard, c );
redraw = doc->setSelectionEnd( QTextDocument::Standard, *cursor ) || redraw;
}
}
for ( int i = 1; i < doc->numSelections(); ++i ) // start with 1 as we don't want to remove the Standard-Selection
redraw = doc->removeSelection( i ) || redraw;
if ( !redraw ) {
drawCursor( TRUE );
} else {
repaintChanged();
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}
} else if ( e->button() == MidButton ) {
bool redraw = doc->removeSelection( QTextDocument::Standard );
if ( !redraw ) {
drawCursor( TRUE );
} else {
repaintChanged();
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}
}
if ( *cursor != oldCursor )
updateCurrentFormat();
}
/*!
\reimp
*/
void QTextEdit::contentsMouseMoveEvent( QMouseEvent *e )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimMouseMoveEvent( e );
return;
}
#endif
if ( sendMouseEventToInputContext( e ) ) {
// don't return from here to avoid cursor vanishing
} else if ( mousePressed ) {
#ifndef QT_NO_DRAGANDDROP
if ( mightStartDrag ) {
dragStartTimer->stop();
if ( ( e->pos() - dragStartPos ).manhattanLength() > QApplication::startDragDistance() ) {
QGuardedPtr<QTextEdit> guard( this );
startDrag();
if (guard.isNull()) // we got deleted during the dnd
return;
}
#ifndef QT_NO_CURSOR
if ( !isReadOnly() )
viewport()->setCursor( ibeamCursor );
#endif
return;
}
#endif
mousePos = e->pos();
handleMouseMove( mousePos );
oldMousePos = mousePos;
}
#ifndef QT_NO_CURSOR
if ( !isReadOnly() && !mousePressed ) {
if ( doc->hasSelection( QTextDocument::Standard ) && doc->inSelection( QTextDocument::Standard, e->pos() ) )
viewport()->setCursor( arrowCursor );
else
viewport()->setCursor( ibeamCursor );
}
#endif
updateCursor( e->pos() );
}
void QTextEdit::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 QTextEdit::contentsMouseReleaseEvent( QMouseEvent * e )
{
if ( !inDoubleClick && !d->composeMode() ) { // 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
if ( sendMouseEventToInputContext( e ) )
return;
QTextCursor oldCursor = *cursor;
if ( scrollTimer->isActive() )
scrollTimer->stop();
#ifndef QT_NO_DRAGANDDROP
if ( dragStartTimer->isActive() )
dragStartTimer->stop();
if ( mightStartDrag ) {
selectAll( FALSE );
mousePressed = FALSE;
}
#endif
bool mouseWasPressed = mousePressed;
if ( mousePressed ) {
mousePressed = FALSE;
copyToClipboard();
}
#ifndef QT_NO_CLIPBOARD
else if ( e->button() == 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( QTextDocument::Standard, oldCursor );
bool redraw = FALSE;
if ( doc->hasSelection( QTextDocument::Standard ) ) {
redraw = doc->removeSelection( QTextDocument::Standard );
doc->setSelectionStart( QTextDocument::Standard, *cursor );
} else {
doc->setSelectionStart( QTextDocument::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( 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() && mouseWasPressed ) {
if (!onLink.isEmpty()) {
QUrl u( doc->context(), onLink, TRUE );
emitLinkClicked( u.toString( FALSE, FALSE ) );
}
if (::qt_cast<QTextBrowser*>(this)) { // change for 4.0
QConnectionList *clist = receivers(
"anchorClicked(const QString&,const QString&)");
if (!signalsBlocked() && clist) {
QUObject o[3];
static_QUType_QString.set(o+1, d->onName);
static_QUType_QString.set(o+2, onLink);
activate_signal( clist, o);
}
}
// 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( QTextDocument::Standard, TRUE ) )
doc->removeSelection( QTextDocument::Standard );
emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
emit selectionChanged();
}
/*!
\reimp
*/
void QTextEdit::contentsMouseDoubleClickEvent( QMouseEvent * e )
{
if ( e->button() != Qt::LeftButton && !d->composeMode() ) {
e->ignore();
return;
}
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 ( (uint) i < str.length() && !str[ i ].isSpace() ) {
endIdx = ++i;
}
// ..and start of next
while ( (uint) i < str.length() && str[ i ].isSpace() ) {
endIdx = ++i;
}
optimSetSelection( para, startIdx, para, endIdx );
repaintContents( FALSE );
}
} else
#endif
{
if ( sendMouseEventToInputContext( e ) )
return;
QTextCursor c1 = *cursor;
QTextCursor c2 = *cursor;
#if defined(Q_OS_MAC)
QTextParagraph *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( QTextDocument::Standard, c1 );
doc->setSelectionEnd( QTextDocument::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 QTextEdit::contentsDragEnterEvent( QDragEnterEvent *e )
{
if ( isReadOnly() || !QTextDrag::canDecode( e ) ) {
e->ignore();
return;
}
e->acceptAction();
inDnD = TRUE;
}
/*!
\reimp
*/
void QTextEdit::contentsDragMoveEvent( QDragMoveEvent *e )
{
if ( isReadOnly() || !QTextDrag::canDecode( e ) ) {
e->ignore();
return;
}
drawCursor( FALSE );
placeCursor( e->pos(), cursor );
drawCursor( TRUE );
e->acceptAction();
}
/*!
\reimp
*/
void QTextEdit::contentsDragLeaveEvent( QDragLeaveEvent * )
{
drawCursor( FALSE );
inDnD = FALSE;
}
/*!
\reimp
*/
void QTextEdit::contentsDropEvent( QDropEvent *e )
{
if ( isReadOnly() )
return;
inDnD = FALSE;
e->acceptAction();
bool intern = FALSE;
if ( QRichTextDrag::canDecode( e ) ) {
bool hasSel = doc->hasSelection( QTextDocument::Standard );
bool internalDrag = e->source() == this || e->source() == viewport();
int dropId, dropIndex;
QTextCursor insertCursor = *cursor;
dropId = cursor->paragraph()->paragId();
dropIndex = cursor->index();
if ( hasSel && internalDrag ) {
QTextCursor c1, c2;
int selStartId, selStartIndex;
int selEndId, selEndIndex;
c1 = doc->selectionStartCursor( QTextDocument::Standard );
c1.restoreState();
c2 = doc->selectionEndCursor( QTextDocument::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( QTextDocument::Standard );
} else {
doc->removeSelection( QTextDocument::Standard );
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}
drawCursor( FALSE );
cursor->setParagraph( insertCursor.paragraph() );
cursor->setIndex( insertCursor.index() );
drawCursor( TRUE );
if ( !cursor->nestedDepth() ) {
QString subType = "plain";
if ( textFormat() != PlainText ) {
if ( e->provides( "application/x-qrichtext" ) )
subType = "x-qrichtext";
}
#ifndef QT_NO_CLIPBOARD
pasteSubType( subType.latin1(), 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 QTextEdit::contentsContextMenuEvent( QContextMenuEvent *e )
{
e->accept();
#ifndef QT_NO_IM
if ( d->composeMode() )
return;
#endif
clearUndoRedo();
mousePressed = FALSE;
#ifndef QT_NO_POPUPMENU
QGuardedPtr<QTextEdit> that = this;
QGuardedPtr<QPopupMenu> popup = createPopupMenu( e->pos() );
if ( !popup )
popup = createPopupMenu();
if ( !popup )
return;
int r = popup->exec( e->globalPos() );
delete popup;
if (!that)
return;
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 QTextEdit::autoScrollTimerDone()
{
if ( mousePressed )
handleMouseMove( viewportToContents( viewport()->mapFromGlobal( QCursor::pos() ) ) );
}
void QTextEdit::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 );
QTextCursor oldCursor = *cursor;
placeCursor( pos );
if ( inDoubleClick ) {
QTextCursor cl = *cursor;
cl.gotoPreviousWord();
QTextCursor 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( QTextDocument::Standard ) ) {
redraw = doc->setSelectionEnd( QTextDocument::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 QTextEdit::placeCursor( const QPoint &pos, QTextCursor *c, bool link )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return;
#endif
if ( !c )
c = cursor;
resetInputContext();
c->restoreState();
QTextParagraph *s = doc->firstParagraph();
c->place( pos, s, link );
updateMicroFocusHint();
}
void QTextEdit::updateMicroFocusHint()
{
QTextCursor c( *cursor );
#if 0
// Disabled for Asian input method that shows candidate
// window. This behavior is same as Qt/E 2.3.7 which supports
// Asian input methods. Asian input methods need start point of IM
// selection text to place candidate window as adjacent to the
// selection text.
if ( d->preeditStart != -1 ) {
c.setIndex( d->preeditStart );
if(doc->hasSelection(QTextDocument::IMSelectionText)) {
int para, index;
doc->selectionStart(QTextDocument::IMSelectionText, para, index);
c.setIndex(index);
}
}
#endif
if ( hasFocus() || viewport()->hasFocus() ) {
int h = c.paragraph()->lineHeightOfChar( cursor->index() );
if ( !readonly ) {
QFont f = c.paragraph()->at( c.index() )->format()->font();
setMicroFocusHint( c.x() - contentsX() + frameWidth(),
c.y() + cursor->paragraph()->rect().y() - contentsY() + frameWidth(), 0, h, TRUE, &f );
}
}
}
void QTextEdit::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 QTextEdit::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( FALSE );
}
/*! \internal */
void QTextEdit::doChangeInterval()
{
interval = 0;
}
/*!
\reimp
*/
bool QTextEdit::eventFilter( QObject *o, QEvent *e )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( !d->optimMode && (o == this || o == viewport()) ) {
#else
if ( o == this || o == viewport() ) {
#endif
if ( e->type() == QEvent::FocusIn ) {
if ( QApplication::cursorFlashTime() > 0 )
blinkTimer->start( QApplication::cursorFlashTime() / 2 );
drawCursor( TRUE );
updateMicroFocusHint();
} else if ( e->type() == QEvent::FocusOut ) {
blinkTimer->stop();
drawCursor( FALSE );
}
}
if ( o == this && e->type() == QEvent::PaletteChange ) {
QColor old( viewport()->colorGroup().color( QColorGroup::Text ) );
if ( old != colorGroup().color( QColorGroup::Text ) ) {
QColor c( colorGroup().color( QColorGroup::Text ) );
doc->setMinimumWidth( -1 );
doc->setDefaultFormat( doc->formatCollection()->defaultFormat()->font(), c );
lastFormatted = doc->firstParagraph();
formatMore();
repaintChanged();
}
}
return QScrollView::eventFilter( o, e );
}
/*!
\obsolete
*/
void QTextEdit::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 behaviour of the editor is undefined if the \a text contains
newlines. (It is not possible to change QTextEdit'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 \c LogText mode this function will do nothing.
\sa paste() pasteSubType()
*/
void QTextEdit::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;
bool imComposition = insertionFlags & AsIMCompositionText;
bool imSelection = insertionFlags & WithIMSelection;
QString txt( text );
drawCursor( FALSE );
if ( !isReadOnly() && doc->hasSelection( QTextDocument::Standard ) && removeSelected )
removeSelectedText();
QTextCursor c2 = *cursor;
int oldLen = 0;
if ( undoEnabled && !isReadOnly() && undoRedoInfo.type != UndoRedoInfo::IME ) {
checkUndoRedoInfo( UndoRedoInfo::Insert );
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 = QString::null;
}
oldLen = undoRedoInfo.d->text.length();
}
lastFormatted = checkNewLine && cursor->paragraph()->prev() ?
cursor->paragraph()->prev() : cursor->paragraph();
QTextCursor oldCursor = *cursor;
cursor->insert( txt, checkNewLine );
if ( doc->useFormatCollection() && !doc->preProcessor() ) {
doc->setSelectionStart( QTextDocument::Temp, oldCursor );
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
doc->setFormat( QTextDocument::Temp, currentFormat, QTextFormat::Format );
doc->removeSelection( QTextDocument::Temp );
}
if ( indent && ( txt == "{" || txt == "}" || txt == ":" || txt == "#" ) )
cursor->indent();
formatMore();
repaintChanged();
ensureCursorVisible();
// Asian users regard selection text as cursor on candidate
// selection phase of input method, so ordinary cursor should be
// invisible if IM selection text exists.
drawCursor( !imSelection );
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 ] != '\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( QTextDocument::Standard, oldCursor );
doc->setSelectionEnd( QTextDocument::Standard, *cursor );
repaintChanged();
}
// updateMicroFocusHint() should not be invoked here when this
// function is invoked from imComposeEvent() because cursor
// postion is incorrect yet. imComposeEvent() invokes
// updateMicroFocusHint() later.
if ( !imComposition ) {
updateMicroFocusHint();
}
setModified();
emit textChanged();
}
/*!
Inserts \a text in the paragraph \a para at position \a index.
*/
void QTextEdit::insertAt( const QString &text, int para, int index )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimInsert( text, para, index );
return;
}
#endif
resetInputContext();
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return;
removeSelection( QTextDocument::Standard );
QTextCursor tmp = *cursor;
cursor->setParagraph( p );
cursor->setIndex( index );
insert( text, FALSE, TRUE, FALSE );
*cursor = tmp;
removeSelection( QTextDocument::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 QTextEdit::insertParagraph( const QString &text, int para )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimInsert( text + "\n", para, 0 );
return;
}
#endif
resetInputContext();
for ( int i = 0; i < (int)doc->numSelections(); ++i )
doc->removeSelection( i );
QTextParagraph *p = doc->paragAt( para );
bool append = !p;
if ( !p )
p = doc->lastParagraph();
QTextCursor 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 QTextEdit::removeParagraph( int para )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return;
#endif
resetInputContext();
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return;
for ( int i = 0; i < doc->numSelections(); ++i )
doc->removeSelection( i );
QTextCursor start( doc );
QTextCursor 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( QTextDocument::Temp, start );
doc->setSelectionEnd( QTextDocument::Temp, end );
removeSelectedText( QTextDocument::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 QTextEdit::undo()
{
clearUndoRedo();
if ( isReadOnly() || !doc->commands()->isUndoAvailable() || !undoEnabled )
return;
resetInputContext();
for ( int i = 0; i < (int)doc->numSelections(); ++i )
doc->removeSelection( i );
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
clearUndoRedo();
drawCursor( FALSE );
QTextCursor *c = doc->undo( cursor );
if ( !c ) {
drawCursor( TRUE );
return;
}
lastFormatted = 0;
repaintChanged();
ensureCursorVisible();
drawCursor( TRUE );
updateMicroFocusHint();
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 QTextCursor( doc );
drawCursor( TRUE );
repaintContents( TRUE );
}
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 QTextEdit::redo()
{
if ( isReadOnly() || !doc->commands()->isRedoAvailable() || !undoEnabled )
return;
resetInputContext();
for ( int i = 0; i < (int)doc->numSelections(); ++i )
doc->removeSelection( i );
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
clearUndoRedo();
drawCursor( FALSE );
QTextCursor *c = doc->redo( cursor );
if ( !c ) {
drawCursor( TRUE );
return;
}
lastFormatted = 0;
ensureCursorVisible();
repaintChanged();
ensureCursorVisible();
drawCursor( TRUE );
updateMicroFocusHint();
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() QTextEdit::copy()
*/
void QTextEdit::paste()
{
#ifndef QT_NO_MIMECLIPBOARD
if ( isReadOnly() )
return;
QString subType = "plain";
if ( textFormat() != PlainText ) {
QMimeSource *m = QApplication::clipboard()->data( d->clipboard_mode );
if ( !m )
return;
if ( m->provides( "application/x-qrichtext" ) )
subType = "x-qrichtext";
}
pasteSubType( subType.latin1() );
updateMicroFocusHint();
#endif
}
void QTextEdit::checkUndoRedoInfo( UndoRedoInfo::Type t )
{
if ( undoRedoInfo.valid() && t != undoRedoInfo.type ) {
clearUndoRedo();
}
undoRedoInfo.type = t;
}
/*!
Repaints any paragraphs that have changed.
Although used extensively internally you shouldn't need to call
this yourself.
*/
void QTextEdit::repaintChanged()
{
if ( !isUpdatesEnabled() || !viewport()->isUpdatesEnabled() )
return;
QPainter p( viewport() );
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimDrawContents( &p, contentsX(), contentsY(), visibleWidth(), visibleHeight() );
return;
}
#endif
p.translate( -contentsX(), -contentsY() );
paintDocument( FALSE, &p, contentsX(), contentsY(), visibleWidth(), visibleHeight() );
}
#ifndef QT_NO_MIME
QTextDrag *QTextEdit::dragObject( QWidget *parent ) const
{
if ( !doc->hasSelection( QTextDocument::Standard ) ||
doc->selectedText( QTextDocument::Standard ).isEmpty() )
return 0;
if ( textFormat() != RichText )
return new QTextDrag( doc->selectedText( QTextDocument::Standard ), parent );
QRichTextDrag *drag = new QRichTextDrag( parent );
drag->setPlainText( doc->selectedText( QTextDocument::Standard ) );
drag->setRichText( doc->selectedText( QTextDocument::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 QTextEdit::copy() paste() pasteSubType()
*/
void QTextEdit::cut()
{
if ( isReadOnly() )
return;
resetInputContext();
normalCopy();
removeSelectedText();
updateMicroFocusHint();
}
void QTextEdit::normalCopy()
{
#ifndef QT_NO_MIME
QTextDrag *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 QTextEdit::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 QTextEdit::indent()
{
if ( isReadOnly() )
return;
drawCursor( FALSE );
if ( !doc->hasSelection( QTextDocument::Standard ) )
cursor->indent();
else
doc->indentSelection( QTextDocument::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 QTextEdit::focusNextPrevChild( bool n )
{
if ( !isReadOnly() || !linksEnabled() )
return FALSE;
bool b = doc->focusNextPrevChild( n );
repaintChanged();
if ( b ) {
QTextParagraph *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() ) {
QTextTable *t = (QTextTable*)p->at( start )->customItem();
QPtrList<QTextTableCell> cells = t->tableCells();
QTextTableCell *c;
for ( c = cells.first(); c; c = cells.next() ) {
QTextDocument *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 QTextEdit::setFormat( QTextFormat *f, int flags )
{
if ( doc->hasSelection( QTextDocument::Standard ) ) {
drawCursor( FALSE );
QTextCursor c1 = doc->selectionStartCursor( QTextDocument::Standard );
c1.restoreState();
QTextCursor c2 = doc->selectionEndCursor( QTextDocument::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( QTextDocument::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();
}
}
}
}
/*!
\reimp
*/
void QTextEdit::setPalette( const QPalette &p )
{
QScrollView::setPalette( p );
if ( textFormat() == PlainText ) {
QTextFormat *f = doc->formatCollection()->defaultFormat();
f->setColor( colorGroup().text() );
updateContents();
}
}
/*! \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 QStyleSheetItem::DisplayListItem, the
type of the list item is set to \a listStyle.
\sa setAlignment()
*/
void QTextEdit::setParagType( QStyleSheetItem::DisplayMode dm,
QStyleSheetItem::ListStyle listStyle )
{
if ( isReadOnly() )
return;
drawCursor( FALSE );
QTextParagraph *start = cursor->paragraph();
QTextParagraph *end = start;
if ( doc->hasSelection( QTextDocument::Standard ) ) {
start = doc->selectionStartCursor( QTextDocument::Standard ).topParagraph();
end = doc->selectionEndCursor( QTextDocument::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 = QTextStyleCommand::readStyleInformation( doc, undoRedoInfo.id, undoRedoInfo.eid );
while ( start != end->next() ) {
start->setListStyle( listStyle );
if ( dm == QStyleSheetItem::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 \c Qt::AlignLeft, \c Qt::AlignRight,
\c Qt::AlignJustify and \c Qt::AlignCenter (which centers
horizontally).
*/
void QTextEdit::setAlignment( int a )
{
if ( isReadOnly() || block_set_alignment )
return;
drawCursor( FALSE );
QTextParagraph *start = cursor->paragraph();
QTextParagraph *end = start;
if ( doc->hasSelection( QTextDocument::Standard ) ) {
start = doc->selectionStartCursor( QTextDocument::Standard ).topParagraph();
end = doc->selectionEndCursor( QTextDocument::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 = QTextStyleCommand::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 QTextEdit::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 QTextEdit::setItalic( bool b )
{
QTextFormat f( *currentFormat );
f.setItalic( b );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat(f2, QTextFormat::Italic );
}
/*!
If \a b is TRUE sets the current format to bold; otherwise sets
the current format to non-bold.
\sa bold()
*/
void QTextEdit::setBold( bool b )
{
QTextFormat f( *currentFormat );
f.setBold( b );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Bold );
}
/*!
If \a b is TRUE sets the current format to underline; otherwise
sets the current format to non-underline.
\sa underline()
*/
void QTextEdit::setUnderline( bool b )
{
QTextFormat f( *currentFormat );
f.setUnderline( b );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Underline );
}
/*!
Sets the font family of the current format to \a fontFamily.
\sa family() setCurrentFont()
*/
void QTextEdit::setFamily( const QString &fontFamily )
{
QTextFormat f( *currentFormat );
f.setFamily( fontFamily );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Family );
}
/*!
Sets the point size of the current format to \a s.
Note that if \a s is zero or negative, the behaviour of this
function is not defined.
\sa pointSize() setCurrentFont() setFamily()
*/
void QTextEdit::setPointSize( int s )
{
QTextFormat f( *currentFormat );
f.setPointSize( s );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Size );
}
/*!
Sets the color of the current format, i.e. of the text, to \a c.
\sa color() setPaper()
*/
void QTextEdit::setColor( const QColor &c )
{
QTextFormat f( *currentFormat );
f.setColor( c );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Color );
}
/*!
Sets the vertical alignment of the current format, i.e. of the
text, to \a a.
\sa color() setPaper()
*/
void QTextEdit::setVerticalAlignment( VerticalAlignment a )
{
QTextFormat f( *currentFormat );
f.setVAlign( (QTextFormat::VerticalAlignment)a );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::VAlign );
}
void QTextEdit::setFontInternal( const QFont &f_ )
{
QTextFormat f( *currentFormat );
f.setFont( f_ );
QTextFormat *f2 = doc->formatCollection()->format( &f );
setFormat( f2, QTextFormat::Font );
}
QString QTextEdit::text() const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return optimText();
#endif
QTextParagraph *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 \c RichText the text will contain HTML
formatting tags.
*/
QString QTextEdit::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 = "\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 \c 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 QStyleSheet for details.
The optional \a context is a path which the text edit's
QMimeSourceFactory uses to resolve the locations of files and
images. (See \l{QTextEdit::QTextEdit()}.) It is passed to the text
edit's QMimeSourceFactory when quering data.
Note that the undo/redo history is cleared by this function.
\sa text(), setTextFormat()
*/
void QTextEdit::setText( const QString &text, const QString &context )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimSetText( text );
return;
}
#endif
resetInputContext();
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 QTextCursor( 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 = QString::null;
}
/*!
\property QTextEdit::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 \c AutoText,
i.e. the text edit auto-detects the format of the text.
For richtext, calling text() on an editable QTextEdit 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 QTextEdit::readOnly
\brief whether the text edit is read-only
In a read-only text edit the user can only navigate through the
text and select text; modifying the text is not possible.
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 \a *index character position in the
\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 \a *para, and the
index position of that character within the paragraph is put into
\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, \a *index
and \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 QTextEdit::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() ? arrowCursor : ibeamCursor );
#endif
QTextCursor findcur = *cursor;
if ( para && index ) {
if ( doc->paragAt( *para ) )
findcur.gotoPosition( doc->paragAt(*para), *index );
else
findcur.gotoEnd();
} else if ( doc->hasSelection( QTextDocument::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( QTextDocument::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 QTextEdit::blinkCursor()
{
if ( !cursorVisible )
return;
bool cv = cursorVisible;
blinkCursorVisible = !blinkCursorVisible;
drawCursor( blinkCursorVisible );
cursorVisible = cv;
}
/*!
Sets the cursor to position \a index in paragraph \a para.
\sa getCursorPosition()
*/
void QTextEdit::setCursorPosition( int para, int index )
{
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return;
resetInputContext();
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 \a *para and \a *index parameters to the
current cursor position. \a para and \a index must not be 0.
\sa setCursorPosition()
*/
void QTextEdit::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 QTextEdit::setSelection( int paraFrom, int indexFrom,
int paraTo, int indexTo, int selNum )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if (d->optimMode) {
optimSetSelection(paraFrom, indexFrom, paraTo, indexTo);
repaintContents(FALSE);
return;
}
#endif
resetInputContext();
if ( doc->hasSelection( selNum ) ) {
doc->removeSelection( selNum );
repaintChanged();
}
if ( selNum > doc->numSelections() - 1 )
doc->addSelection( selNum );
QTextParagraph *p1 = doc->paragAt( paraFrom );
if ( !p1 )
return;
QTextParagraph *p2 = doc->paragAt( paraTo );
if ( !p2 )
return;
if ( indexFrom > p1->length() - 1 )
indexFrom = p1->length() - 1;
if ( indexTo > p2->length() - 1 )
indexTo = p2->length() - 1;
drawCursor( FALSE );
QTextCursor c = *cursor;
QTextCursor 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 != QTextDocument::Standard )
*cursor = oldCursor;
drawCursor( TRUE );
}
/*!
If there is a selection, \a *paraFrom is set to the number of the
paragraph in which the selection begins and \a *paraTo is set to
the number of the paragraph in which the selection ends. (They
could be the same.) \a *indexFrom is set to the index at which the
selection begins within \a *paraFrom, and \a *indexTo is set to
the index at which the selection ends within \a *paraTo.
If there is no selection, \a *paraFrom, \a *indexFrom, \a *paraTo
and \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 QTextEdit::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 QTextEdit::textFormat
\brief the text format: rich text, plain text, log text or auto text.
The text format is one of the following:
\list
\i PlainText - all characters, except newlines, are displayed
verbatim, including spaces. Whenever a newline appears in the text
the text edit inserts a hard line break and begins a new
paragraph.
\i RichText - rich text rendering. The available styles are
defined in the default stylesheet QStyleSheet::defaultSheet().
\i LogText - optimized mode for very large texts. Supports a very
limited set of formatting tags (color, bold, underline and italic
settings).
\i AutoText - this is the default. The text edit autodetects which
rendering style is best, \c PlainText or \c RichText. This is done
by using the QStyleSheet::mightBeRichText() function.
\endlist
*/
void QTextEdit::setTextFormat( TextFormat format )
{
doc->setTextFormat( format );
#ifdef QT_TEXTEDIT_OPTIMIZATION
checkOptimMode();
#endif
}
Qt::TextFormat QTextEdit::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 QTextEdit::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 QTextEdit::linesOfParagraph( int para ) const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
if ( d->od->numLines >= para )
return 1;
else
return -1;
}
#endif
QTextParagraph *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 QTextEdit::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
QTextParagraph *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 QTextEdit::lines() const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
return d->od->numLines;
}
#endif
QTextParagraph *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 QTextEdit::lineOfChar( int para, int index )
{
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return -1;
int idx, line;
QTextStringChar *c = p->lineStartOfChar( index, &idx, &line );
if ( !c )
return -1;
return line;
}
void QTextEdit::setModified( bool m )
{
bool oldModified = modified;
modified = m;
if ( modified && doc->oTextValid )
doc->invalidateOriginalText();
if ( oldModified != modified )
emit modificationChanged( modified );
}
/*!
\property QTextEdit::modified
\brief whether the document has been modified by the user
*/
bool QTextEdit::isModified() const
{
return modified;
}
void QTextEdit::setModified()
{
if ( !isModified() )
setModified( TRUE );
}
/*!
Returns TRUE if the current format is italic; otherwise returns FALSE.
\sa setItalic()
*/
bool QTextEdit::italic() const
{
return currentFormat->font().italic();
}
/*!
Returns TRUE if the current format is bold; otherwise returns FALSE.
\sa setBold()
*/
bool QTextEdit::bold() const
{
return currentFormat->font().bold();
}
/*!
Returns TRUE if the current format is underlined; otherwise returns
FALSE.
\sa setUnderline()
*/
bool QTextEdit::underline() const
{
return currentFormat->font().underline();
}
/*!
Returns the font family of the current format.
\sa setFamily() setCurrentFont() setPointSize()
*/
QString QTextEdit::family() const
{
return currentFormat->font().family();
}
/*!
Returns the point size of the font of the current format.
\sa setFamily() setCurrentFont() setPointSize()
*/
int QTextEdit::pointSize() const
{
return currentFormat->font().pointSize();
}
/*!
Returns the color of the current format.
\sa setColor() setPaper()
*/
QColor QTextEdit::color() const
{
return currentFormat->color();
}
/*!
\obsolete
Returns QScrollView::font()
\warning In previous versions this function returned the font of
the current format. This lead to confusion. Please use
currentFont() instead.
*/
QFont QTextEdit::font() const
{
return QScrollView::font();
}
/*!
Returns the font of the current format.
\sa setCurrentFont() setFamily() setPointSize()
*/
QFont QTextEdit::currentFont() const
{
return currentFormat->font();
}
/*!
Returns the alignment of the current paragraph.
\sa setAlignment()
*/
int QTextEdit::alignment() const
{
return currentAlignment;
}
void QTextEdit::startDrag()
{
#ifndef QT_NO_DRAGANDDROP
mousePressed = FALSE;
inDoubleClick = FALSE;
QDragObject *drag = dragObject( viewport() );
if ( !drag )
return;
if ( isReadOnly() ) {
drag->dragCopy();
} else {
if ( drag->drag() && QDragObject::target() != this && QDragObject::target() != viewport() )
removeSelectedText();
}
#endif
}
/*!
If \a select is TRUE (the default), all the text is selected as
selection 0. If \a select is FALSE any selected text is
unselected, i.e. the default selection (selection 0) is cleared.
\sa selectedText
*/
void QTextEdit::selectAll( bool select )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
if ( select )
optimSelectAll();
else
optimRemoveSelection();
return;
}
#endif
if ( !select )
doc->removeSelection( QTextDocument::Standard );
else
doc->selectAll( QTextDocument::Standard );
repaintChanged();
emit copyAvailable( doc->hasSelection( QTextDocument::Standard ) );
emit selectionChanged();
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}
void QTextEdit::UndoRedoInfo::clear()
{
if ( valid() ) {
if ( type == Insert || type == Return )
doc->addCommand( new QTextInsertCommand( doc, id, index, d->text.rawData(), styleInformation ) );
else if ( type == Format )
doc->addCommand( new QTextFormatCommand( doc, id, index, eid, eindex, d->text.rawData(), format, flags ) );
else if ( type == Style )
doc->addCommand( new QTextStyleCommand( doc, id, eid, styleInformation ) );
else if ( type != Invalid ) {
doc->addCommand( new QTextDeleteCommand( doc, id, index, d->text.rawData(), styleInformation ) );
}
}
type = Invalid;
d->text = QString::null;
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 QTextEdit::del()
{
if ( doc->hasSelection( QTextDocument::Standard ) ) {
removeSelectedText();
return;
}
doKeyboardAction( ActionDelete );
}
QTextEdit::UndoRedoInfo::UndoRedoInfo( QTextDocument *dc )
: type( Invalid ), doc( dc )
{
d = new QUndoRedoInfoPrivate;
d->text = QString::null;
id = -1;
index = -1;
}
QTextEdit::UndoRedoInfo::~UndoRedoInfo()
{
delete d;
}
bool QTextEdit::UndoRedoInfo::valid() const
{
return id >= 0 && type != Invalid;
}
/*!
\internal
Resets the current format to the default format.
*/
void QTextEdit::resetFormat()
{
setAlignment( Qt::AlignAuto );
setParagType( QStyleSheetItem::DisplayBlock, QStyleSheetItem::ListDisc );
setFormat( doc->formatCollection()->defaultFormat(), QTextFormat::Format );
}
/*!
Returns the QStyleSheet which is being used by this text edit.
\sa setStyleSheet()
*/
QStyleSheet* QTextEdit::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 QTextEdit::setStyleSheet( QStyleSheet* styleSheet )
{
doc->setStyleSheet( styleSheet );
}
/*!
\property QTextEdit::paper
\brief the background (paper) brush.
The brush that is currently used to draw the background of the
text edit. The initial setting is an empty brush.
*/
void QTextEdit::setPaper( const QBrush& pap )
{
doc->setPaper( new QBrush( pap ) );
if ( pap.pixmap() ) {
viewport()->setBackgroundPixmap( *pap.pixmap() );
} else {
setPaletteBackgroundColor( pap.color() );
viewport()->setPaletteBackgroundColor( pap.color() );
}
#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 QTextEdit::paper() const
{
if ( doc->paper() )
return *doc->paper();
return QBrush( colorGroup().base() );
}
/*!
\property QTextEdit::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 QTextEdit::setLinkUnderline( bool b )
{
if ( doc->underlineLinks() == b )
return;
doc->setUnderlineLinks( b );
repaintChanged();
}
bool QTextEdit::linkUnderline() const
{
return doc->underlineLinks();
}
/*!
Sets the text edit's mimesource factory to \a factory. See
QMimeSourceFactory for further details.
\sa mimeSourceFactory()
*/
#ifndef QT_NO_MIME
void QTextEdit::setMimeSourceFactory( QMimeSourceFactory* factory )
{
doc->setMimeSourceFactory( factory );
}
/*!
Returns the QMimeSourceFactory which is being used by this text
edit.
\sa setMimeSourceFactory()
*/
QMimeSourceFactory* QTextEdit::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 QTextEdit::heightForWidth( int w ) const
{
int oldw = doc->width();
doc->doLayout( 0, w );
int h = doc->height();
doc->setWidth( oldw );
doc->invalidate();
( (QTextEdit*)this )->formatMore();
return h;
}
/*!
Appends 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 QTextEdit::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( QTextDocument::Standard );
TextFormat f = doc->textFormat();
if ( f == AutoText ) {
if ( QStyleSheet::mightBeRichText( text ) )
f = RichText;
else
f = PlainText;
}
drawCursor( FALSE );
QTextCursor oldc( *cursor );
ensureFormatted( doc->lastParagraph() );
bool atBottom = contentsY() >= contentsHeight() - visibleHeight();
cursor->gotoEnd();
if ( cursor->index() > 0 )
cursor->splitAndInsertEmptyParagraph();
QTextCursor oldCursor2 = *cursor;
if ( f == Qt::PlainText ) {
cursor->insert( text, TRUE );
if ( doc->useFormatCollection() && !doc->preProcessor() &&
currentFormat != cursor->paragraph()->at( cursor->index() )->format() ) {
doc->setSelectionStart( QTextDocument::Temp, oldCursor2 );
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
doc->setFormat( QTextDocument::Temp, currentFormat, QTextFormat::Format );
doc->removeSelection( QTextDocument::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 QTextEdit::hasSelectedText
\brief whether some text is selected in selection 0
*/
bool QTextEdit::hasSelectedText() const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return optimHasSelection();
else
#endif
return doc->hasSelection( QTextDocument::Standard );
}
/*!
\property QTextEdit::selectedText
\brief The selected text (from selection 0) or an empty string if
there is no currently selected text (in selection 0).
The text is always returned as \c PlainText if the textFormat() is
\c PlainText or \c AutoText, otherwise it is returned as HTML.
\sa hasSelectedText
*/
QString QTextEdit::selectedText() const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return optimSelectedText();
else
#endif
return doc->selectedText( QTextDocument::Standard, textFormat() == RichText );
}
bool QTextEdit::handleReadOnlyKeyEvent( QKeyEvent *e )
{
switch( e->key() ) {
case Key_Down:
setContentsPos( contentsX(), contentsY() + 10 );
break;
case Key_Up:
setContentsPos( contentsX(), contentsY() - 10 );
break;
case Key_Left:
setContentsPos( contentsX() - 10, contentsY() );
break;
case Key_Right:
setContentsPos( contentsX() + 10, contentsY() );
break;
case Key_PageUp:
setContentsPos( contentsX(), contentsY() - visibleHeight() );
break;
case Key_PageDown:
setContentsPos( contentsX(), contentsY() + visibleHeight() );
break;
case Key_Home:
setContentsPos( contentsX(), 0 );
break;
case Key_End:
setContentsPos( contentsX(), contentsHeight() - visibleHeight() );
break;
case Key_F16: // Copy key on Sun keyboards
copy();
break;
#ifndef QT_NO_NETWORKPROTOCOL
case Key_Return:
case Key_Enter:
case Key_Space: {
if (!doc->focusIndicator.href.isEmpty()
|| !doc->focusIndicator.name.isEmpty()) {
if (!doc->focusIndicator.href.isEmpty()) {
QUrl u( doc->context(), doc->focusIndicator.href, TRUE );
emitLinkClicked( u.toString( FALSE, FALSE ) );
}
if (!doc->focusIndicator.name.isEmpty()) {
if (::qt_cast<QTextBrowser*>(this)) { // change for 4.0
QConnectionList *clist = receivers(
"anchorClicked(const QString&,const QString&)");
if (!signalsBlocked() && clist) {
QUObject o[3];
static_QUType_QString.set(o+1,
doc->focusIndicator.name);
static_QUType_QString.set(o+2,
doc->focusIndicator.href);
activate_signal( clist, o);
}
}
}
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
}
} break;
#endif
default:
if ( e->state() & ControlButton ) {
switch ( e->key() ) {
case Key_C: case Key_F16: // Copy key on Sun keyboards
copy();
break;
#ifdef Q_WS_WIN
case Key_Insert:
copy();
break;
case 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 QMimeSourceFactory uses to resolve the locations
of files and images.
\sa text
*/
QString QTextEdit::context() const
{
return doc->context();
}
/*!
\property QTextEdit::documentTitle
\brief the title of the document parsed from the text.
For \c PlainText the title will be an empty string. For \c
RichText the title will be the text between the \c{<title>} tags,
if present, otherwise an empty string.
*/
QString QTextEdit::documentTitle() const
{
return doc->attributes()[ "title" ];
}
void QTextEdit::makeParagVisible( QTextParagraph *p )
{
setContentsPos( contentsX(), QMIN( p->rect().y(), contentsHeight() - visibleHeight() ) );
}
/*!
Scrolls the text edit to make the text at the anchor called \a
name visible, if it can be found in the document. If the anchor
isn't found no scrolling will occur. An anchor is defined using
the HTML anchor tag, e.g. \c{<a name="target">}.
*/
void QTextEdit::scrollToAnchor( const QString& name )
{
if ( !isVisible() ) {
d->scrollToAnchor = name;
return;
}
if ( name.isEmpty() )
return;
sync();
QTextCursor cursor( doc );
QTextParagraph* last = doc->lastParagraph();
for (;;) {
QTextStringChar* c = cursor.paragraph()->at( cursor.index() );
if( c->isAnchor() ) {
QString a = c->anchorName();
if ( a == name ||
(a.contains( '#' ) && QStringList::split( '#', a ).contains( name ) ) ) {
setContentsPos( contentsX(), QMIN( cursor.paragraph()->rect().top() + cursor.totalOffsetY(), contentsHeight() - visibleHeight() ) );
break;
}
}
if ( cursor.paragraph() == last && cursor.atParagEnd() )
break;
cursor.gotoNextLetter();
}
}
#if (QT_VERSION-0 >= 0x040000)
#error "function anchorAt(const QPoint& pos) should be merged into function anchorAt(const QPoint& pos, AnchorAttribute attr)"
#endif
/*!
\overload
If there is an anchor at position \a pos (in contents
coordinates), its \c href is returned, otherwise QString::null is
returned.
*/
QString QTextEdit::anchorAt( const QPoint& pos )
{
return anchorAt(pos, AnchorHref);
}
/*!
If there is an anchor at position \a pos (in contents
coordinates), the text for attribute \a attr is returned,
otherwise QString::null is returned.
*/
QString QTextEdit::anchorAt( const QPoint& pos, AnchorAttribute attr )
{
QTextCursor c( doc );
placeCursor( pos, &c );
switch(attr) {
case AnchorName:
return c.paragraph()->at( c.index() )->anchorName();
case AnchorHref:
return c.paragraph()->at( c.index() )->anchorHref();
}
// incase the compiler is really dumb about determining if a function
// returns something :)
return QString::null;
}
void QTextEdit::documentWidthChanged( int w )
{
resizeContents( QMAX( visibleWidth(), w), contentsHeight() );
}
/*! \internal
This function does nothing
*/
void QTextEdit::updateStyles()
{
}
void QTextEdit::setDocument( QTextDocument *dc )
{
if ( dc == 0 ) {
qWarning( "Q3TextEdit::setDocument() called with null Q3TextDocument pointer" );
return;
}
if ( dc == doc )
return;
resetInputContext();
doc = dc;
delete cursor;
cursor = new QTextCursor( 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() QTextEdit::copy()
*/
void QTextEdit::pasteSubType( const QCString &subtype )
{
#ifndef QT_NO_MIMECLIPBOARD
QMimeSource *m = QApplication::clipboard()->data( d->clipboard_mode );
pasteSubType( subtype, m );
#endif
}
/*! \internal */
void QTextEdit::pasteSubType( const QCString& subtype, QMimeSource *m )
{
#ifndef QT_NO_MIME
QCString st = subtype;
if ( subtype != "x-qrichtext" )
st.prepend( "text/" );
else
st.prepend( "application/" );
if ( !m )
return;
if ( doc->hasSelection( QTextDocument::Standard ) )
removeSelectedText();
if ( !QRichTextDrag::canDecode( m ) )
return;
QString t;
if ( !QRichTextDrag::decode( m, t, st.data(), subtype ) )
return;
if ( st == "application/x-qrichtext" ) {
int start;
if ( (start = t.find( "<!--StartFragment-->" )) != -1 ) {
start += 20;
int end = t.find( "<!--EndFragment-->" );
QTextCursor 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( QTextDocument::Temp, oldC );
doc->setSelectionEnd( QTextDocument::Temp, *cursor );
checkUndoRedoInfo( UndoRedoInfo::Insert );
if ( !undoRedoInfo.valid() ) {
undoRedoInfo.id = oldC.paragraph()->paragId();
undoRedoInfo.index = oldC.index();
undoRedoInfo.d->text = QString::null;
}
int oldLen = undoRedoInfo.d->text.length();
if ( !doc->preProcessor() ) {
QString txt = doc->selectedText( QTextDocument::Temp );
undoRedoInfo.d->text += txt;
for ( int i = 0; i < (int)txt.length(); ++i ) {
if ( txt[ i ] != '\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( QTextDocument::Temp );
}
formatMore();
setModified();
emit textChanged();
repaintChanged();
ensureCursorVisible();
return;
}
} else {
#if defined(Q_OS_WIN32)
// Need to convert CRLF to LF
t.replace( "\r\n", "\n" );
#elif defined(Q_OS_MAC)
//need to convert CR to LF
t.replace( '\r', '\n' );
#endif
QChar *uc = (QChar *)t.unicode();
for ( int i=0; (uint) i<t.length(); i++ ) {
if ( uc[ i ] < ' ' && uc[ i ] != '\n' && uc[ i ] != '\t' )
uc[ i ] = ' ';
}
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 QTextEdit::pasteSpecial( const QPoint& pt )
{
QCString st = pickSpecial( QApplication::clipboard()->data( d->clipboard_mode ),
TRUE, pt );
if ( !st.isEmpty() )
pasteSubType( st );
}
#endif
#ifndef QT_NO_MIME
QCString QTextEdit::pickSpecial( QMimeSource* ms, bool always_ask, const QPoint& pt )
{
if ( ms ) {
#ifndef QT_NO_POPUPMENU
QPopupMenu popup( this, "qt_pickspecial_menu" );
QString fmt;
int n = 0;
QDict<void> done;
for (int i = 0; !( fmt = ms->format( i ) ).isNull(); i++) {
int semi = fmt.find( ";" );
if ( semi >= 0 )
fmt = fmt.left( semi );
if ( fmt.left( 5 ) == "text/" ) {
fmt = fmt.mid( 5 );
if ( !done.find( fmt ) ) {
done.insert( fmt,(void*)1 );
popup.insertItem( fmt, i );
n++;
}
}
}
if ( n ) {
int i = n ==1 && !always_ask ? popup.idAt( 0 ) : popup.exec( pt );
if ( i >= 0 )
return popup.text(i).latin1();
}
#else
QString fmt;
for (int i = 0; !( fmt = ms->format( i ) ).isNull(); i++) {
int semi = fmt.find( ";" );
if ( semi >= 0 )
fmt = fmt.left( semi );
if ( fmt.left( 5 ) == "text/" ) {
fmt = fmt.mid( 5 );
return fmt.latin1();
}
}
#endif
}
return QCString();
}
#endif // QT_NO_MIME
#endif // QT_NO_CLIPBOARD
/*!
\enum QTextEdit::WordWrap
This enum defines the QTextEdit's word wrap modes.
\value NoWrap Do not wrap the text.
\value WidgetWidth Wrap the text at the current width of the
widget (this is the default). Wrapping is at whitespace by
default; this can be changed with setWrapPolicy().
\value FixedPixelWidth Wrap the text at a fixed number of pixels
from the widget's left side. The number of pixels is set with
wrapColumnOrWidth().
\value FixedColumnWidth Wrap the text at a fixed number of
character columns from the widget's left side. The number of
characters is set with wrapColumnOrWidth(). This is useful if you
need formatted text that can also be displayed gracefully on
devices with monospaced fonts, for example a standard VT100
terminal, where you might set wrapColumnOrWidth() to 80.
\sa setWordWrap() wordWrap()
*/
/*!
\property QTextEdit::wordWrap
\brief the word wrap mode
The default mode is \c WidgetWidth which causes words to be
wrapped at the right edge of the text edit. Wrapping occurs at
whitespace, keeping whole words intact. If you want wrapping to
occur within words use setWrapPolicy(). If you set a wrap mode of
\c FixedPixelWidth or \c FixedColumnWidth you should also call
setWrapColumnOrWidth() with the width you want.
\sa WordWrap, wrapColumnOrWidth, wrapPolicy,
*/
void QTextEdit::setWordWrap( WordWrap mode )
{
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
}
QTextEdit::WordWrap QTextEdit::wordWrap() const
{
return wrapMode;
}
/*!
\property QTextEdit::wrapColumnOrWidth
\brief the position (in pixels or columns depending on the wrap mode) where text will be wrapped
If the wrap mode is \c FixedPixelWidth, the value is the number of
pixels from the left edge of the text edit at which text should be
wrapped. If the wrap mode is \c FixedColumnWidth, the value is the
column number (in character columns) from the left edge of the
text edit at which text should be wrapped.
\sa wordWrap
*/
void QTextEdit::setWrapColumnOrWidth( int value )
{
wrapWidth = value;
if ( wrapMode == FixedColumnWidth ) {
document()->formatter()->setWrapAtColumn( wrapWidth );
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 QTextEdit::wrapColumnOrWidth() const
{
if ( wrapMode == WidgetWidth )
return visibleWidth();
return wrapWidth;
}
/*!
\enum QTextEdit::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 QTextEdit::wrapPolicy
\brief the word wrap policy, at whitespace or anywhere
Defines where text can be wrapped when word wrap mode is not \c
NoWrap. The choices are \c AtWordBoundary (the default), \c
Anywhere and \c AtWordOrDocumentBoundary
\sa wordWrap
*/
void QTextEdit::setWrapPolicy( WrapPolicy policy )
{
if ( wPolicy == policy )
return;
wPolicy = policy;
QTextFormatter *formatter;
if ( policy == AtWordBoundary || policy == AtWordOrDocumentBoundary ) {
formatter = new QTextFormatterBreakWords;
formatter->setAllowBreakInWords( policy == AtWordOrDocumentBoundary );
} else {
formatter = new QTextFormatterBreakInWords;
}
formatter->setWrapAtColumn( document()->formatter()->wrapAtColumn() );
formatter->setWrapEnabled( document()->formatter()->isWrapEnabled( 0 ) );
document()->setFormatter( formatter );
doc->invalidate();
updateContents();
lastFormatted = doc->firstParagraph();
interval = 0;
formatMore();
}
QTextEdit::WrapPolicy QTextEdit::wrapPolicy() const
{
return wPolicy;
}
/*!
Deletes all the text in the text edit.
\sa cut() removeSelectedText() setText()
*/
void QTextEdit::clear()
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
optimSetText("");
} else
#endif
{
// make clear undoable
doc->selectAll( QTextDocument::Temp );
removeSelectedText( QTextDocument::Temp );
setContentsPos( 0, 0 );
if ( cursor->isValid() )
cursor->restoreState();
doc->clear( TRUE );
delete cursor;
cursor = new QTextCursor( doc );
lastFormatted = 0;
}
updateContents();
emit cursorPositionChanged( cursor );
emit cursorPositionChanged( cursor->paragraph()->paragId(), cursor->index() );
}
int QTextEdit::undoDepth() const
{
return document()->undoDepth();
}
/*!
\property QTextEdit::length
\brief the number of characters in the text
*/
int QTextEdit::length() const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode )
return d->od->len;
else
#endif
return document()->length();
}
/*!
\property QTextEdit::tabStopWidth
\brief the tab stop width in pixels
*/
int QTextEdit::tabStopWidth() const
{
return document()->tabStopWidth();
}
void QTextEdit::setUndoDepth( int d )
{
document()->setUndoDepth( d );
}
void QTextEdit::setTabStopWidth( int ts )
{
document()->setTabStops( ts );
doc->invalidate();
lastFormatted = doc->firstParagraph();
interval = 0;
formatMore();
updateContents();
}
/*!
\reimp
*/
QSize QTextEdit::sizeHint() const
{
// cf. QScrollView::sizeHint()
constPolish();
int f = 2 * frameWidth();
int h = fontMetrics().height();
QSize sz( f, f );
return sz.expandedTo( QSize(12 * h, 8 * h) );
}
void QTextEdit::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 QTextEdit::getFormat( int para, int index, QFont *font, QColor *color, VerticalAlignment *verticalAlignment )
{
if ( !font || !color )
return FALSE;
QTextParagraph *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 QStyleSheetItem::DisplayListItem) and \a
listDepth to the depth of the list (if the display mode is
QStyleSheetItem::DisplayListItem).
Returns FALSE if \a para is out of range otherwise returns TRUE.
*/
bool QTextEdit::getParagraphFormat( int para, QFont *font, QColor *color,
VerticalAlignment *verticalAlignment, int *alignment,
QStyleSheetItem::DisplayMode *displayMode,
QStyleSheetItem::ListStyle *listStyle,
int *listDepth )
{
if ( !font || !color || !alignment || !displayMode || !listStyle )
return FALSE;
QTextParagraph *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() ? QStyleSheetItem::DisplayListItem : QStyleSheetItem::DisplayBlock;
*listStyle = p->listStyle();
*listDepth = p->listDepth();
return TRUE;
}
/*!
This function is called to create a right mouse button popup menu
at the document position \a pos. If you want to create a custom
popup menu, reimplement this function and return the created popup
menu. Ownership of the popup menu is transferred to the caller.
\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.
*/
QPopupMenu *QTextEdit::createPopupMenu( const QPoint& pos )
{
Q_UNUSED( pos )
#ifndef QT_NO_POPUPMENU
QPopupMenu *popup = new QPopupMenu( this, "qt_edit_menu" );
if ( !isReadOnly() ) {
d->id[ IdUndo ] = popup->insertItem( tr( "&Undo" ) + ACCEL_KEY( Z ) );
d->id[ IdRedo ] = popup->insertItem( tr( "&Redo" ) + ACCEL_KEY( Y ) );
popup->insertSeparator();
}
#ifndef QT_NO_CLIPBOARD
if ( !isReadOnly() )
d->id[ IdCut ] = popup->insertItem( tr( "Cu&t" ) + ACCEL_KEY( X ) );
d->id[ IdCopy ] = popup->insertItem( tr( "&Copy" ) + ACCEL_KEY( C ) );
if ( !isReadOnly() )
d->id[ IdPaste ] = popup->insertItem( tr( "&Paste" ) + ACCEL_KEY( V ) );
#endif
if ( !isReadOnly() ) {
d->id[ IdClear ] = popup->insertItem( tr( "Clear" ) );
popup->insertSeparator();
}
#if defined(Q_WS_X11)
d->id[ IdSelectAll ] = popup->insertItem( tr( "Select All" ) );
#else
d->id[ IdSelectAll ] = popup->insertItem( tr( "Select All" ) + ACCEL_KEY( A ) );
#endif
#ifndef QT_NO_IM
QInputContext *qic = getInputContext();
if ( qic )
qic->addMenusTo( popup );
#endif
popup->setItemEnabled( d->id[ IdUndo ], !isReadOnly() && doc->commands()->isUndoAvailable() );
popup->setItemEnabled( d->id[ IdRedo ], !isReadOnly() && doc->commands()->isRedoAvailable() );
#ifndef QT_NO_CLIPBOARD
popup->setItemEnabled( d->id[ IdCut ], !isReadOnly() && doc->hasSelection( QTextDocument::Standard, TRUE ) );
#ifdef QT_TEXTEDIT_OPTIMIZATION
popup->setItemEnabled( d->id[ IdCopy ], d->optimMode ? optimHasSelection() : doc->hasSelection( QTextDocument::Standard, TRUE ) );
#else
popup->setItemEnabled( d->id[ IdCopy ], doc->hasSelection( QTextDocument::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
\obsolete
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.
*/
QPopupMenu *QTextEdit::createPopupMenu()
{
return 0;
}
/*!
\reimp
*/
void QTextEdit::setFont( const QFont &f )
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
QScrollView::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
QScrollView::setFont( f );
doc->setMinimumWidth( -1 );
doc->setDefaultFormat( f, doc->formatCollection()->defaultFormat()->color() );
lastFormatted = doc->firstParagraph();
formatMore();
repaintChanged();
}
/*!
\fn QTextEdit::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 QTextEdit::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 QTextEdit::zoomIn( int range )
{
QFont f( QScrollView::font() );
f.setPointSize( QFontInfo(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 QTextEdit::zoomOut( int range )
{
QFont f( QScrollView::font() );
f.setPointSize( QMAX( 1, QFontInfo(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 QTextEdit::zoomTo( int size )
{
QFont f( QScrollView::font() );
f.setPointSize( size );
setFont( f );
}
/*!
QTextEdit is optimized for large amounts text. One of its
optimizations is to format only the visible text, formatting the rest
on demand, e.g. as the user scrolls, so you don't usually need to
call this function.
In some situations you may want to force the whole text
to be formatted. For example, if after calling setText(), you wanted
to know the height of the document (using contentsHeight()), you
would call this function first.
*/
void QTextEdit::sync()
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
QFontMetrics fm( QScrollView::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();
}
/*!
\reimp
*/
void QTextEdit::setEnabled( bool b )
{
QScrollView::setEnabled( b );
if ( textFormat() == PlainText ) {
QTextFormat *f = doc->formatCollection()->defaultFormat();
f->setColor( colorGroup().text() );
updateContents();
}
}
/*!
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
colorGroup().
*/
void QTextEdit::setSelectionAttributes( int selNum, const QColor &back, bool invertText )
{
if ( selNum < 1 )
return;
if ( selNum > doc->numSelections() )
doc->addSelection( selNum );
doc->setSelectionColor( selNum, back );
doc->setInvertSelectionText( selNum, invertText );
}
/*!
\reimp
*/
void QTextEdit::windowActivationChange( bool oldActive )
{
if ( oldActive && scrollTimer )
scrollTimer->stop();
if ( palette().active() != palette().inactive() )
updateContents();
QScrollView::windowActivationChange( oldActive );
}
void QTextEdit::setReadOnly( bool b )
{
if ( (bool) readonly == b )
return;
readonly = b;
#ifndef QT_NO_CURSOR
if ( readonly )
viewport()->setCursor( arrowCursor );
else
viewport()->setCursor( ibeamCursor );
setInputMethodEnabled( !readonly );
#endif
#ifdef QT_TEXTEDIT_OPTIMIZATION
checkOptimMode();
#endif
}
/*!
Scrolls to the bottom of the document and does formatting if
required.
*/
void QTextEdit::scrollToBottom()
{
sync();
setContentsPos( contentsX(), contentsHeight() - visibleHeight() );
}
/*!
Returns the rectangle of the paragraph \a para in contents
coordinates, or an invalid rectangle if \a para is out of range.
*/
QRect QTextEdit::paragraphRect( int para ) const
{
QTextEdit *that = (QTextEdit *)this;
that->sync();
QTextParagraph *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 QTextEdit::paragraphAt( const QPoint &pos ) const
{
#ifdef QT_TEXTEDIT_OPTIMIZATION
if ( d->optimMode ) {
QFontMetrics fm( QScrollView::font() );
int parag = pos.y() / fm.lineSpacing();
if ( parag <= d->od->numLines )
return parag;
else
return 0;
}
#endif
QTextCursor 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,
\a *para is set to the character's paragraph.
*/
int QTextEdit::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
QTextCursor 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 QTextEdit::setParagraphBackgroundColor( int para, const QColor &bg )
{
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return;
p->setBackgroundColor( bg );
repaintChanged();
}
/*!
Clears the background color of the paragraph \a para, so that the
default color is used again.
*/
void QTextEdit::clearParagraphBackground( int para )
{
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return;
p->clearBackgroundColor();
repaintChanged();
}
/*!
Returns the background color of the paragraph \a para or an
invalid color if \a para is out of range or the paragraph has no
background set
*/
QColor QTextEdit::paragraphBackgroundColor( int para ) const
{
QTextParagraph *p = doc->paragAt( para );
if ( !p )
return QColor();
QColor *c = p->backgroundColor();
if ( c )
return *c;
return QColor();
}
/*!
\property QTextEdit::undoRedoEnabled
\brief whether undo/redo is enabled
When changing this property, the undo/redo history is cleared.
The default is TRUE.
*/
void QTextEdit::setUndoRedoEnabled( bool b )
{
undoRedoInfo.clear();
doc->commands()->clear();
undoEnabled = b;
}
bool QTextEdit::isUndoRedoEnabled() const
{
return undoEnabled;
}
/*!
Returns TRUE if undo is available; otherwise returns FALSE.
*/
bool QTextEdit::isUndoAvailable() const
{
return undoEnabled && (doc->commands()->isUndoAvailable() || undoRedoInfo.valid());
}
/*!
Returns TRUE if redo is available; otherwise returns FALSE.
*/
bool QTextEdit::isRedoAvailable() const
{
return undoEnabled && doc->commands()->isRedoAvailable();
}
void QTextEdit::ensureFormatted( QTextParagraph *p )
{
while ( !p->isValid() ) {
if ( !lastFormatted )
return;
formatMore();
}
}
/*! \internal */
void QTextEdit::updateCursor( const QPoint & pos )
{
if ( isReadOnly() && linksEnabled() ) {
QTextCursor 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 = QString::null;
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 = QString::null;
if (!c.paragraph()->at( c.index() )->anchorHref().isEmpty() ) {
#ifndef QT_NO_CURSOR
viewport()->setCursor( onLink.isEmpty() ? arrowCursor : pointingHandCursor );
#endif
QUrl u( doc->context(), onLink, TRUE );
emitHighlighted( u.toString( FALSE, FALSE ) );
}
} else {
#ifndef QT_NO_CURSOR
viewport()->setCursor( isReadOnly() ? arrowCursor : ibeamCursor );
#endif
onLink = QString::null;
emitHighlighted( QString::null );
}
#endif
}
}
/*!
Places the cursor \a c at the character which is closest to position
\a pos (in contents coordinates). If \a c is 0, the default text
cursor is used.
\sa setCursorPosition()
*/
void QTextEdit::placeCursor( const QPoint &pos, QTextCursor *c )
{
placeCursor( pos, c, FALSE );
}
/*! \internal */
void QTextEdit::clipboardChanged()
{
#ifndef QT_NO_CLIPBOARD
// don't listen to selection changes
disconnect( QApplication::clipboard(), SIGNAL(selectionChanged()), this, 0);
#endif
selectAll(FALSE);
}
/*! \property QTextEdit::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 QTextEdit::setTabChangesFocus( bool b )
{
d->tabChangesFocus = b;
}
bool QTextEdit::tabChangesFocus() const
{
return d->tabChangesFocus;
}
#ifdef QT_TEXTEDIT_OPTIMIZATION
/* Implementation of optimized LogText mode follows */
static void qSwap( int * a, int * b )
{
if ( !a || !b )
return;
int tmp = *a;
*a = *b;
*b = tmp;
}
/*! \internal */
bool QTextEdit::checkOptimMode()
{
bool oldMode = d->optimMode;
if ( textFormat() == LogText ) {
setReadOnly( TRUE );
d->optimMode = TRUE;
} else {
d->optimMode = FALSE;
}
// when changing mode - try to keep selections and text
if ( oldMode != d->optimMode ) {
if ( d->optimMode ) {
d->od = new QTextEditOptimPrivate;
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 QTextCursor( 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 QTextEdit::optimText() const
{
QString str, tmp;
if ( d->od->len == 0 )
return str;
// concatenate all strings
int i;
int offset;
QMapConstIterator<int,QTextEditOptimPrivate::Tag *> it;
QTextEditOptimPrivate::Tag * ftag = 0;
for ( i = 0; i < d->od->numLines; i++ ) {
if ( d->od->lines[ LOGOFFSET(i) ].isEmpty() ) { // CR lines are empty
str += "\n";
} else {
tmp = d->od->lines[ LOGOFFSET(i) ] + "\n";
// inject the tags for this line
if ( (it = d->od->tagIndex.find( LOGOFFSET(i) )) != d->od->tagIndex.end() )
ftag = it.data();
offset = 0;
while ( ftag && ftag->line == i ) {
tmp.insert( ftag->index + offset, "<" + ftag->tag + ">" );
offset += ftag->tag.length() + 2; // 2 -> the '<' and '>' chars
ftag = ftag->next;
}
str += tmp;
}
}
return str;
}
/*! \internal */
void QTextEdit::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( QScrollView::font() );
if ( !(str.isEmpty() || str.isNull() || d->maxLogLines == 0) ) {
QStringList strl = QStringList::split( '\n', str, TRUE );
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.
*/
QTextEditOptimPrivate::Tag * QTextEdit::optimAppendTag( int index, const QString & tag )
{
QTextEditOptimPrivate::Tag * t = new QTextEditOptimPrivate::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.replace( LOGOFFSET(t->line), t );
}
return t;
}
/*! \internal
Insert \a tag in the tag - according to line and index numbers
*/
QTextEditOptimPrivate::Tag *QTextEdit::optimInsertTag(int line, int index, const QString &tag)
{
QTextEditOptimPrivate::Tag *t = new QTextEditOptimPrivate::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,QTextEditOptimPrivate::Tag *>::ConstIterator it;
if ((it = d->od->tagIndex.find(LOGOFFSET(line))) != d->od->tagIndex.end()) {
tmp = *it;
if (tmp->index >= index) { // the exisiting 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.replace(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 QTextEdit::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;
QPtrStack<QTextEditOptimPrivate::Tag> tagStack;
for ( i = 0; i < len; i++ ) {
tagOpen = (*line)[i] == '<';
tagClose = (*line)[i] == '>';
// handle '&lt;' and '&gt;' and '&amp;'
if ( (*line)[i] == '&' ) {
escIndex = i;
continue;
} else if ( escIndex != -1 && (*line)[i] == ';' ) {
QString esc = line->mid( escIndex, i - escIndex + 1 );
QString c;
if ( esc == "&lt;" )
c = '<';
else if ( esc == "&gt;" )
c = '>';
else if ( esc == "&amp;" )
c = '&';
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() ) {
QTextEditOptimPrivate::Tag * tag, * cur, * tmp;
bool format = TRUE;
if ( tagStr == "b" )
bold++;
else if ( tagStr == "/b" )
bold--;
else if ( tagStr == "i" )
italic++;
else if ( tagStr == "/i" )
italic--;
else if ( tagStr == "u" )
underline++;
else if ( tagStr == "/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 ? QTextEditOptimPrivate::Format
: QTextEditOptimPrivate::Color;
if ( tagStr[0] == '/' ) {
// this is a right-tag - search for the left-tag
// and possible parent tag
cur = tag->prev;
if ( !cur ) {
#ifdef QT_CHECK_RANGE
qWarning( "QTextEdit::optimParseTags: no left-tag for '<%s>' in line %d.", tag->tag.ascii(), tag->line + 1 );
#endif
return; // something is wrong - give up
}
while ( cur ) {
if ( cur->leftTag ) { // push right-tags encountered
tagStack.push( cur );
} else {
tmp = tagStack.pop();
if ( !tmp ) {
if ( (("/" + cur->tag) == tag->tag) ||
(tag->tag == "/font" && cur->tag.left(4) == "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 ) {
#ifdef QT_CHECK_RANGE
qWarning( "QTextEdit::optimParseTags: mismatching %s-tag for '<%s>' in line %d.", cur->tag[0] == '/' ? "left" : "right", cur->tag.ascii(), cur->line + 1 );
#endif
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 = "";
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.contains('\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.find('\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 QTextEdit::optimHasBoldMetrics(int line)
{
QTextEditOptimPrivate::Tag *t;
QMapConstIterator<int,QTextEditOptimPrivate::Tag *> it;
if ((it = d->od->tagIndex.find(line)) != d->od->tagIndex.end()) {
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 QTextEdit::optimAppend( const QString &str )
{
if ( str.isEmpty() || str.isNull() || d->maxLogLines == 0 )
return;
QStringList strl = QStringList::split( '\n', str, TRUE );
QStringList::Iterator it = strl.begin();
QFontMetrics fm(QScrollView::font());
int lWidth = 0;
for ( ; it != strl.end(); ++it ) {
optimParseTags( &*it );
optimCheckLimit( *it );
if (optimHasBoldMetrics(d->od->numLines-1)) {
QFont fnt = QScrollView::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] == '<';
tagClose = (*line)[i] == '>';
// handle '&lt;' and '&gt;' and '&amp;'
if ( (*line)[i] == '&' ) {
escIndex = i;
continue;
} else if ( escIndex != -1 && (*line)[i] == ';' ) {
QString esc = line->mid( escIndex, i - escIndex + 1 );
QString c;
if ( esc == "&lt;" )
c = '<';
else if ( esc == "&gt;" )
c = '>';
else if ( esc == "&amp;" )
c = '&';
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 QTextEdit::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 > (int) d->od->lines[line].length())
index = d->od->lines[line].length();
QStringList strl = QStringList::split('\n', text, TRUE);
int numNewLines = (int)strl.count() - 1;
QTextEditOptimPrivate::Tag *tag = 0;
QMap<int,QTextEditOptimPrivate::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.find(LOGOFFSET(line))) != d->od->tagIndex.end()) {
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.find(LOGOFFSET(line))) != d->od->tagIndex.end()) {
tag = ii.data();
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.find(LOGOFFSET(tag->line))) != d->od->tagIndex.end()))
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.find(LOGOFFSET(line + numNewLines))) != d->od->tagIndex.end()) {
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(QScrollView::font());
int lWidth = 0;
for (x = line; x < line + numNewLines; x++) {
if (optimHasBoldMetrics(x)) {
QFont fnt = QScrollView::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.
*/
QTextEditOptimPrivate::Tag * QTextEdit::optimPreviousLeftTag( int line )
{
QTextEditOptimPrivate::Tag * ftag = 0;
QMapConstIterator<int,QTextEditOptimPrivate::Tag *> it;
if ( (it = d->od->tagIndex.find( LOGOFFSET(line) )) != d->od->tagIndex.end() )
ftag = it.data();
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 QTextEdit::optimSetTextFormat( QTextDocument * td, QTextCursor * cur,
QTextFormat * f, int start, int end,
QTextEditOptimPrivate::Tag * tag )
{
int formatFlags = QTextFormat::Bold | QTextFormat::Italic |
QTextFormat::Underline;
cur->setIndex( start );
td->setSelectionStart( 0, *cur );
cur->setIndex( end );
td->setSelectionEnd( 0, *cur );
QStyleSheetItem * ssItem = styleSheet()->item( tag->tag );
if ( !ssItem || tag->type == QTextEditOptimPrivate::Format ) {
f->setBold( tag->bold );
f->setItalic( tag->italic );
f->setUnderline( tag->underline );
if ( tag->type == QTextEditOptimPrivate::Format ) {
// check to see if there are any open color tags prior to
// this format tag
tag = tag->prev;
while ( tag && (tag->type == QTextEditOptimPrivate::Format ||
tag->leftTag) ) {
tag = tag->leftTag ? tag->parent : tag->prev;
}
}
if ( tag ) {
QString col = tag->tag.simplifyWhiteSpace();
if ( col.left( 10 ) == "font color" ) {
int i = col.find( '=', 10 );
col = col.mid( i + 1 ).simplifyWhiteSpace();
if ( col[0] == '\"' )
col = col.mid( 1, col.length() - 2 );
}
QColor color = QColor( col );
if ( color.isValid() ) {
formatFlags |= QTextFormat::Color;
f->setColor( color );
}
}
} else { // use the stylesheet tag definition
if ( ssItem->color().isValid() ) {
formatFlags |= QTextFormat::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 QTextEdit::optimDrawContents( QPainter * p, int clipx, int clipy,
int clipw, int cliph )
{
QFontMetrics fm( QScrollView::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) ] + "\n" );
QTextDocument * td = new QTextDocument( 0 );
td->setDefaultFormat( QScrollView::font(), QColor() );
td->setPlainText( str );
td->setFormatter( new QTextFormatterBreakWords ); // deleted by QTextDoc
td->formatter()->setWrapEnabled( FALSE );
td->setTabStops(doc->tabStopWidth());
// get the current text color from the current format
td->selectAll( QTextDocument::Standard );
QTextFormat f;
f.setColor( colorGroup().text() );
f.setFont( QScrollView::font() );
td->setFormat( QTextDocument::Standard, &f,
QTextFormat::Color | QTextFormat::Font );
td->removeSelection( QTextDocument::Standard );
// add tag formatting
if ( d->od->tags ) {
int i = startLine;
QMapConstIterator<int,QTextEditOptimPrivate::Tag *> it;
QTextEditOptimPrivate::Tag * tag = 0, * tmp = 0;
QTextCursor cur( td );
// Step 1 - find previous left-tag
tmp = optimPreviousLeftTag( i );
for ( ; i < startLine + nLines; i++ ) {
if ( (it = d->od->tagIndex.find( LOGOFFSET(i) )) != d->od->tagIndex.end() )
tag = it.data();
// 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() ) {
QTextCursor c1( td );
QTextCursor 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);
QTextParagraph * parag = td->paragAt( paragS );
if ( parag ) {
c1.setParagraph( parag );
if ( td->text( paragS ).length() >= (uint) idxStart )
c1.setIndex( idxStart );
}
parag = td->paragAt( paragE );
if ( parag ) {
c2.setParagraph( parag );
if ( td->text( paragE ).length() >= (uint) idxEnd )
c2.setIndex( idxEnd );
}
} else if ( startLine > selStart && endLine < selEnd ) {
// case 2: area to paint is all part of the selection
td->selectAll( QTextDocument::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;
QTextParagraph * parag = td->paragAt( paragE );
if ( parag ) {
c2.setParagraph( parag );
if ( td->text( paragE ).length() >= (uint) 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;
QTextParagraph * 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( QTextDocument::Standard ) ) {
td->setSelectionStart( QTextDocument::Standard, c1 );
td->setSelectionEnd( QTextDocument::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(), colorGroup() );
p->translate( 0, -(clipy - offset) );
delete td;
}
/*! \internal */
void QTextEdit::optimMousePressEvent( QMouseEvent * e )
{
if ( e->button() != LeftButton )
return;
QFontMetrics fm( QScrollView::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( FALSE );
}
/*! \internal */
void QTextEdit::optimMouseReleaseEvent( QMouseEvent * e )
{
if ( e->button() != LeftButton )
return;
if ( scrollTimer->isActive() )
scrollTimer->stop();
if ( !inDoubleClick ) {
QFontMetrics fm( QScrollView::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( FALSE );
}
if ( mousePressed ) {
mousePressed = FALSE;
copyToClipboard();
}
inDoubleClick = FALSE;
emit copyAvailable( optimHasSelection() );
emit selectionChanged();
}
/*! \internal */
void QTextEdit::optimMouseMoveEvent( QMouseEvent * e )
{
mousePos = e->pos();
optimDoAutoScroll();
oldMousePos = mousePos;
}
/*! \internal */
void QTextEdit::optimDoAutoScroll()
{
if ( !mousePressed )
return;
QFontMetrics fm( QScrollView::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( 'w');
else if ( pos.x() > viewport()->width() )
xx = contentsX() + viewport()->width() + fm.width('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 heigth 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(), FALSE );
} 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, FALSE );
}
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 QTextEdit::optimCharIndex( const QString &str, int mx ) const
{
QFontMetrics fm(QScrollView::font());
uint i = 0;
int dd, dist = 10000000;
int curpos = 0;
int strWidth;
mx = mx - 4; // ### get the real margin from somewhere
if (!str.contains('\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 QTextEdit::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( FALSE );
emit copyAvailable( optimHasSelection() );
emit selectionChanged();
}
/*! \internal */
void QTextEdit::optimRemoveSelection()
{
d->od->selStart.line = d->od->selEnd.line = -1;
d->od->selStart.index = d->od->selEnd.index = -1;
repaintContents( FALSE );
}
/*! \internal */
void QTextEdit::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 QTextEdit::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 QTextEdit::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 ) + "\n";
i++;
for ( ; i < d->od->selEnd.line; i++ ) {
if ( d->od->lines[ LOGOFFSET(i) ].isEmpty() ) // CR lines are empty
str += "\n";
else
str += d->od->lines[ LOGOFFSET(i) ] + "\n";
}
str += d->od->lines[ LOGOFFSET(d->od->selEnd.line) ].left( d->od->selEnd.index );
}
return str;
}
/*! \internal */
bool QTextEdit::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) ].find( expr, idx, cs ) :
d->od->lines[ LOGOFFSET(i) ].findRev( expr, idx, cs );
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 + 1;
d->od->search.line = i;
optimSetSelection( i, idx, i, idx + expr.length() );
QFontMetrics fm( QScrollView::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 QTextEdit::polish()
{
// 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();
QWidget::polish();
}
/*!
Sets the maximum number of lines a QTextEdit can hold in \c
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 QTextEdit::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 QTextEdit can hold in \c
LogText mode. By default the number of lines is unlimited, which
is signified by a value of -1.
*/
int QTextEdit::maxLogLines()
{
return d->maxLogLines;
}
/*!
Check if the number of lines in the buffer is limited, and uphold
that limit when appending new lines.
*/
void QTextEdit::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.
QTextEditOptimPrivate::Tag *t = d->od->tags, *tmp, *itr;
QPtrList<QTextEditOptimPrivate::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 ( tmp = lst.first(); tmp; tmp = lst.next() ) {
if ( itr->parent == tmp )
itr->parent = 0;
if ( itr->leftTag == tmp )
itr->leftTag = 0;
}
itr = itr->next;
}
// ...in the tag index as well
QMapIterator<int, QTextEditOptimPrivate::Tag *> idx;
if ( (idx = d->od->tagIndex.find( d->logOffset )) != d->od->tagIndex.end() )
d->od->tagIndex.remove( idx );
QMapIterator<int,QString> it;
if ( (it = d->od->lines.find( d->logOffset )) != d->od->lines.end() ) {
d->od->len -= (*it).length();
d->od->lines.remove( 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 QTextEdit::autoFormatting
\brief the enabled set of auto formatting features
The value can be any combination of the values in the \c
AutoFormatting 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 QTextEdit::setAutoFormatting( uint features )
{
d->autoFormatting = features;
}
uint QTextEdit::autoFormatting() const
{
return d->autoFormatting;
}
/*!
Returns the QSyntaxHighlighter set on this QTextEdit. 0 is
returned if no syntax highlighter is set.
*/
QSyntaxHighlighter * QTextEdit::syntaxHighlighter() const
{
if (document()->preProcessor())
return ((QSyntaxHighlighterInternal *) document()->preProcessor())->highlighter;
else
return 0;
}
#endif //QT_NO_TEXTEDIT