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/cppmodelmanagersupport.h

@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** 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
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+** conditions see http://qt.digia.com/licensing.  For further information
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+**
+** 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
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+****************************************************************************/
+
+#ifndef CPPTOOLS_CPPMODELMANAGERSUPPORT_H
+#define CPPTOOLS_CPPMODELMANAGERSUPPORT_H
+
+#include "cpptools_global.h"
+
+#include <QString>
+
+namespace TextEditor { class ITextEditor; }
+
+namespace CppTools {
+
+class CppCompletionAssistProvider;
+class CppHighlightingSupport;
+
+class CPPTOOLS_EXPORT ModelManagerSupport
+{
+public:
+    virtual ~ModelManagerSupport() = 0;
+
+    virtual QString id() const = 0;
+    virtual QString displayName() const = 0;
+
+    virtual CppCompletionAssistProvider *completionAssistProvider() = 0;
+    virtual CppHighlightingSupport *highlightingSupport(TextEditor::ITextEditor *editor) = 0;
+};
+
+} // CppTools namespace
+
+#endif // CPPTOOLS_CPPMODELMANAGERSUPPORT_H