Snippets: Make it easier for plugins to add snippets groups

Groups are no longer enum values but identified from snippet providers.

src/plugins/texteditor/snippets/isnippetprovider.h

@@ -0,0 +1,59 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** Commercial Usage
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Nokia.
+**
+** 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at http://qt.nokia.com/contact.
+**
+**************************************************************************/
+
+#ifndef ISNIPPETEDITORDECORATOR_H
+#define ISNIPPETEDITORDECORATOR_H
+
+#include "snippet.h"
+
+#include <texteditor/texteditor_global.h>
+
+#include <QtCore/QObject>
+
+namespace TextEditor {
+
+class SnippetEditor;
+
+class TEXTEDITOR_EXPORT ISnippetProvider : public QObject
+{
+    Q_OBJECT
+public:
+    virtual ~ISnippetProvider();
+
+    virtual QString groupId() const = 0;
+    virtual QString displayName() const = 0;
+    virtual void decorateEditor(SnippetEditor *editor) const = 0;
+
+protected:
+    ISnippetProvider();
+};
+
+} // TextEditor
+
+#endif // ISNIPPETEDITORDECORATOR_H