Experimental integration of DiffEditor

After enabling the plugin go to Tools|Diff...

Change-Id: I793b6faedb93f58039df0a62e82fe04a017978ee
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/diffeditor/diffeditorplugin.h

@@ -0,0 +1,158 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 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 DIFFEDITORPLUGIN_H
+#define DIFFEDITORPLUGIN_H
+
+#include <extensionsystem/iplugin.h>
+#include <coreplugin/editormanager/ieditorfactory.h>
+#include <coreplugin/editormanager/ieditor.h>
+#include <coreplugin/icontext.h>
+#include <coreplugin/idocument.h>
+
+#include <QtPlugin>
+#include <QPointer>
+#include <QStringList>
+#include <QAction>
+#include <QToolBar>
+
+namespace DIFFEditor {
+class DiffEditorWidget;
+
+namespace Internal {
+class DiffFile;
+
+class DiffEditor : public Core::IEditor
+{
+    Q_OBJECT
+public:
+    explicit DiffEditor(DiffEditorWidget *editorWidget);
+    virtual ~DiffEditor();
+
+public:
+    // Core::IEditor
+    bool createNew(const QString &contents);
+    bool open(QString *errorString, const QString &fileName, const QString &realFileName);
+    Core::IDocument *document();
+    QString displayName() const;
+    void setDisplayName(const QString &title);
+    bool duplicateSupported() const;
+    Core::IEditor *duplicate(QWidget *parent);
+    Core::Id id() const;
+    bool isTemporary() const { return true; }
+    DiffEditorWidget *editorWidget() const { return m_editorWidget; }
+
+    QWidget *toolBar();
+
+    QByteArray saveState() const;
+    bool restoreState(const QByteArray &state);
+
+private:
+    DiffFile *m_file;
+    DiffEditorWidget *m_editorWidget;
+    QToolBar *m_toolWidget;
+    mutable QString m_displayName;
+};
+
+class DiffFile : public Core::IDocument
+{
+    Q_OBJECT
+public:
+    explicit DiffFile(const QString &mimeType,
+                              QObject *parent = 0);
+
+    QString fileName() const { return m_fileName; }
+    QString defaultPath() const { return QString(); }
+    QString suggestedFileName() const { return QString(); }
+
+    bool isModified() const { return m_modified; }
+    QString mimeType() const;
+    bool isSaveAsAllowed() const { return false; }
+    bool save(QString *errorString, const QString &fileName, bool autoSave);
+    ReloadBehavior reloadBehavior(ChangeTrigger state, ChangeType type) const;
+    bool reload(QString *errorString, ReloadFlag flag, ChangeType type);
+    void rename(const QString &newName);
+
+    void setFileName(const QString &name);
+    void setModified(bool modified = true);
+
+signals:
+    void saveMe(QString *errorString, const QString &fileName, bool autoSave);
+
+private:
+    const QString m_mimeType;
+    bool m_modified;
+    QString m_fileName;
+};
+
+class DiffEditorPlugin : public ExtensionSystem::IPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "DiffEditor.json")
+
+public:
+    DiffEditorPlugin();
+    ~DiffEditorPlugin();
+
+    bool initialize(const QStringList &arguments, QString *errorMessage = 0);
+    void extensionsInitialized();
+
+    // Connect editor to settings changed signals.
+    void initializeEditor(DiffEditorWidget *editor);
+
+private slots:
+    void diff();
+
+private:
+    DiffEditorWidget *getDiffEditorWidget(const Core::IEditor *editor) const;
+    QString getFileContents(const QString &fileName, QTextCodec *codec) const;
+
+};
+
+class DiffEditorFactory : public Core::IEditorFactory
+{
+    Q_OBJECT
+
+public:
+    explicit DiffEditorFactory(DiffEditorPlugin *owner);
+
+    QStringList mimeTypes() const;
+    Core::IEditor *createEditor(QWidget *parent);
+    Core::Id id() const;
+    QString displayName() const;
+
+private:
+    const QStringList m_mimeTypes;
+    DiffEditorPlugin *m_owner;
+};
+
+} // namespace Internal
+} // namespace DIFFEditor
+
+#endif // DIFFEDITORPLUGIN_H