C++: unify highlighting/code-completion support "factories".

Both semantic highlighting and code-completion go hand-in-hand, so now
the ModelManagerSupport class acts as a "factory" for the model manager.
Depending on the mime-type of the document in the editor, the model
manager will return the appropriate highlighter or code-completion
engine. If none is registered, the built-in fall-back is used.

Change-Id: I3e5dbb0e3b58e077dd5eda9aecb2ce5d448ac0b8
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@digia.com>

src/plugins/cpptools/cppmodelmanagersupportinternal.h

@@ -0,0 +1,61 @@
+/****************************************************************************
+**
+** 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.
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+****************************************************************************/
+
+#ifndef CPPTOOLS_INTERNAL_CPPMODELMANAGERSUPPORTINTERNAL_H
+#define CPPTOOLS_INTERNAL_CPPMODELMANAGERSUPPORTINTERNAL_H
+
+#include "cppmodelmanagersupport.h"
+
+#include <QScopedPointer>
+
+namespace CppTools {
+namespace Internal {
+
+class ModelManagerSupportInternal: public ModelManagerSupport
+{
+    Q_DISABLE_COPY(ModelManagerSupportInternal)
+
+public:
+    ModelManagerSupportInternal();
+    virtual ~ModelManagerSupportInternal();
+
+    virtual QString id() const;
+    virtual QString displayName() const;
+
+    virtual CppCompletionAssistProvider *completionAssistProvider();
+    virtual CppHighlightingSupport *highlightingSupport(TextEditor::ITextEditor *editor);
+
+private:
+    QScopedPointer<CppCompletionAssistProvider> m_completionAssistProvider;
+};
+
+} // Internal namespace
+} // CppTools namespace
+
+#endif // CPPTOOLS_INTERNAL_CPPMODELMANAGERSUPPORTINTERNAL_H