Add TextWriter from QML.

src/libs/utils/textwriter.cpp

+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "textwriter.h"
+
+namespace Utils {
+
+TextWriter::TextWriter()
+        :string(0), cursor(0)
+{
+}
+
+static bool overlaps(int posA, int lengthA, int posB, int lengthB) {
+    return (posA < posB + lengthB && posA + lengthA > posB + lengthB)
+            || (posA < posB && posA + lengthA > posB);
+}
+
+bool TextWriter::hasOverlap(int pos, int length)
+{
+    {
+        QListIterator<Replace> i(replaceList);
+        while (i.hasNext()) {
+            const Replace &cmd = i.next();
+            if (overlaps(pos, length, cmd.pos, cmd.length))
+                return true;
+        }
+    }
+    {
+        QListIterator<Move> i(moveList);
+        while (i.hasNext()) {
+            const Move &cmd = i.next();
+            if (overlaps(pos, length, cmd.pos, cmd.length))
+                return true;
+        }
+        return false;
+    }
+}
+
+bool TextWriter::hasMoveInto(int pos, int length)
+{
+    QListIterator<Move> i(moveList);
+    while (i.hasNext()) {
+        const Move &cmd = i.next();
+        if (cmd.to >= pos && cmd.to < pos + length)
+            return true;
+    }
+    return false;
+}
+
+void TextWriter::replace(int pos, int length, const QString &replacement)
+{
+    Q_ASSERT(!hasOverlap(pos, length));
+    Q_ASSERT(!hasMoveInto(pos, length));
+
+    Replace cmd;
+    cmd.pos = pos;
+    cmd.length = length;
+    cmd.replacement = replacement;
+    replaceList += cmd;
+}
+
+void TextWriter::move(int pos, int length, int to)
+{
+    Q_ASSERT(!hasOverlap(pos, length));
+
+    Move cmd;
+    cmd.pos = pos;
+    cmd.length = length;
+    cmd.to = to;
+    moveList += cmd;
+}
+
+void TextWriter::doReplace(const Replace &replace)
+{
+    int diff = replace.replacement.size() - replace.length;
+    {
+        QMutableListIterator<Replace> i(replaceList);
+        while (i.hasNext()) {
+            Replace &c = i.next();
+            if (replace.pos < c.pos)
+                c.pos += diff;
+            else if (replace.pos + replace.length < c.pos + c.length)
+                c.length += diff;
+        }
+    }
+    {
+        QMutableListIterator<Move> i(moveList);
+        while (i.hasNext()) {
+            Move &c = i.next();
+            if (replace.pos < c.pos)
+                c.pos += diff;
+            else if (replace.pos + replace.length < c.pos + c.length)
+                c.length += diff;
+
+            if (replace.pos < c.to)
+                c.to += diff;
+        }
+    }
+
+    if (string) {
+        string->replace(replace.pos, replace.length, replace.replacement);
+    } else if (cursor) {
+        cursor->setPosition(replace.pos);
+        cursor->setPosition(replace.pos + replace.length, QTextCursor::KeepAnchor);
+        cursor->insertText(replace.replacement);
+    }
+}
+
+void TextWriter::doMove(const Move &move)
+{
+    QString text;
+    if (string) {
+        text = string->mid(move.pos, move.length);
+    } else if (cursor) {
+        cursor->setPosition(move.pos);
+        cursor->setPosition(move.pos + move.length, QTextCursor::KeepAnchor);
+        text = cursor->selectedText();
+    }
+
+    Replace cut;
+    cut.pos = move.pos;
+    cut.length = move.length;
+    Replace paste;
+    paste.pos = move.to;
+    paste.length = 0;
+    paste.replacement = text;
+
+    replaceList.append(cut);
+    replaceList.append(paste);
+
+    Replace cmd;
+    while (!replaceList.isEmpty()) {
+        cmd = replaceList.first();
+        replaceList.removeFirst();
+        doReplace(cmd);
+    }
+}
+
+void TextWriter::write(QString *s)
+{
+    string = s;
+    write_helper();
+    string = 0;
+}
+
+void TextWriter::write(QTextCursor *textCursor)
+{
+    cursor = textCursor;
+    write_helper();
+    cursor = 0;
+}
+
+void TextWriter::write_helper()
+{
+    if (cursor)
+        cursor->beginEditBlock();
+    {
+        Replace cmd;
+        while (!replaceList.isEmpty()) {
+            cmd = replaceList.first();
+            replaceList.removeFirst();
+            doReplace(cmd);
+        }
+    }
+    {
+        Move cmd;
+        while (!moveList.isEmpty()) {
+            cmd = moveList.first();
+            moveList.removeFirst();
+            doMove(cmd);
+        }
+    }
+    if (cursor)
+        cursor->endEditBlock();
+}
+
+} // end namespace Utils

src/libs/utils/textwriter.h

+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TEXTWRITER_H
+#define TEXTWRITER_H
+
+#include "utils_global.h"
+
+#include <QtCore/QString>
+#include <QtCore/QList>
+#include <QtGui/QTextCursor>
+
+namespace Utils {
+
+class QTCREATOR_UTILS_EXPORT TextWriter
+{
+    QString *string;
+    QTextCursor *cursor;
+
+    struct Replace {
+            int pos;
+            int length;
+            QString replacement;
+    };
+
+    QList<Replace> replaceList;
+
+    struct Move {
+            int pos;
+            int length;
+            int to;
+    };
+
+    QList<Move> moveList;
+
+    bool hasOverlap(int pos, int length);
+    bool hasMoveInto(int pos, int length);
+
+    void doReplace(const Replace &replace);
+    void doMove(const Move &move);
+
+    void write_helper();
+
+public:
+    TextWriter();
+
+    void replace(int pos, int length, const QString &replacement);
+    void move(int pos, int length, int to);
+
+    void write(QString *s);
+    void write(QTextCursor *textCursor);
+};
+
+} // namespace Utils
+
+#endif // TEXTWRITER_H

src/libs/utils/utils.pro

@@ -36,7 +36,8 @@ SOURCES += reloadpromptutils.cpp \
     iwelcomepage.cpp \
     fancymainwindow.cpp \
     detailsbutton.cpp \
-    detailswidget.cpp
+    detailswidget.cpp \
+    textwriter.cpp
 win32 { 
     SOURCES += abstractprocess_win.cpp \
         consoleprocess_win.cpp \
@@ -80,7 +81,8 @@ HEADERS += utils_global.h \
     iwelcomepage.h \
     fancymainwindow.h \
     detailsbutton.h \
-    detailswidget.h
+    detailswidget.h \
+    textwriter.h
 FORMS += filewizardpage.ui \
     projectintropage.ui \
     newclasswidget.ui \