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diff --git a/src/plugins/texteditor/textdocument.h b/src/plugins/texteditor/textdocument.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#ifndef BASETEXTDOCUMENT_H
+#define BASETEXTDOCUMENT_H
+
+#include "texteditor_global.h"
+
+#include <coreplugin/id.h>
+#include <coreplugin/textdocument.h>
+#include <coreplugin/editormanager/editormanager.h>
+#include <coreplugin/editormanager/ieditor.h>
+
+#include <QList>
+#include <QMap>
+#include <QSharedPointer>
+
+QT_BEGIN_NAMESPACE
+class QTextCursor;
+class QTextDocument;
+QT_END_NAMESPACE
+
+namespace TextEditor {
+
+class ExtraEncodingSettings;
+class FontSettings;
+class Indenter;
+class StorageSettings;
+class SyntaxHighlighter;
+class TabSettings;
+class TextDocumentPrivate;
+class TextMark;
+class TypingSettings;
+
+typedef QList<TextMark *> TextMarks;
+
+class TEXTEDITOR_EXPORT TextDocument : public Core::BaseTextDocument
+{
+    Q_OBJECT
+
+public:
+    explicit TextDocument(Core::Id id = Core::Id());
+    virtual ~TextDocument();
+
+    static QMap<QString, QString> openedTextDocumentContents();
+    static QMap<QString, QTextCodec *> openedTextDocumentEncodings();
+
+    virtual QString plainText() const;
+    virtual QString textAt(int pos, int length) const;
+    virtual QChar characterAt(int pos) const;
+
+    void setTypingSettings(const TypingSettings &typingSettings);
+    void setStorageSettings(const StorageSettings &storageSettings);
+    void setExtraEncodingSettings(const ExtraEncodingSettings &extraEncodingSettings);
+
+    const TypingSettings &typingSettings() const;
+    const StorageSettings &storageSettings() const;
+    const TabSettings &tabSettings() const;
+    const ExtraEncodingSettings &extraEncodingSettings() const;
+    const FontSettings &fontSettings() const;
+
+    void setIndenter(Indenter *indenter);
+    Indenter *indenter() const;
+    void autoIndent(const QTextCursor &cursor, QChar typedChar = QChar::Null);
+    void autoReindent(const QTextCursor &cursor);
+    QTextCursor indent(const QTextCursor &cursor);
+    QTextCursor unindent(const QTextCursor &cursor);
+
+    TextMarks marks() const;
+    bool addMark(TextMark *mark);
+    TextMarks marksAt(int line) const;
+    void removeMark(TextMark *mark);
+    void updateMark(TextMark *mark);
+    void moveMark(TextMark *mark, int previousLine);
+    void removeMarkFromMarksCache(TextMark *mark);
+
+    // IDocument implementation.
+    bool save(QString *errorString, const QString &fileName, bool autoSave);
+    bool setContents(const QByteArray &contents);
+    bool shouldAutoSave() const;
+    bool isFileReadOnly() const;
+    bool isModified() const;
+    bool isSaveAsAllowed() const;
+    void checkPermissions();
+    bool reload(QString *errorString, ReloadFlag flag, ChangeType type);
+    void setFilePath(const QString &newName);
+
+    QString defaultPath() const;
+    QString suggestedFileName() const;
+
+    void setDefaultPath(const QString &defaultPath);
+    void setSuggestedFileName(const QString &suggestedFileName);
+
+    virtual bool open(QString *errorString, const QString &fileName, const QString &realFileName);
+    virtual bool reload(QString *errorString);
+
+    bool setPlainText(const QString &text);
+    QTextDocument *document() const;
+    void setSyntaxHighlighter(SyntaxHighlighter *highlighter);
+    SyntaxHighlighter *syntaxHighlighter() const;
+
+    bool reload(QString *errorString, QTextCodec *codec);
+    void cleanWhitespace(const QTextCursor &cursor);
+
+    virtual void triggerPendingUpdates();
+
+public slots:
+    void setTabSettings(const TextEditor::TabSettings &tabSettings);
+    void setFontSettings(const TextEditor::FontSettings &fontSettings);
+
+signals:
+    void contentsChanged();
+    void tabSettingsChanged();
+    void fontSettingsChanged();
+
+protected slots:
+    virtual void applyFontSettings();
+
+private:
+    void cleanWhitespace(QTextCursor &cursor, bool cleanIndentation, bool inEntireDocument);
+    void ensureFinalNewLine(QTextCursor &cursor);
+
+    TextDocumentPrivate *d;
+};
+
+typedef QSharedPointer<TextDocument> BaseTextDocumentPtr;
+
+} // namespace TextEditor
+
+#endif // BASETEXTDOCUMENT_H