C++: Moved completion/highlighting into the model manager.

This way the editor does not need to know all the details of
instantiating or maintaining classes for highlighting and/or completion,
it can just ask the model manager. The change also enables different
highlighting- or completion-engines without changes to the cppeditor.

Change-Id: I8000d9d9fe446b292defddb2295493cf77d0f14a
Reviewed-by: Leandro Melo <leandro.melo@nokia.com>

src/plugins/cpptools/cpptoolseditorsupport.h

@@ -36,6 +36,7 @@
 #include <QtCore/QObject>
 #include <QtCore/QPointer>
 #include <QtCore/QFuture>
+#include <QtCore/QScopedPointer>
 #include <QtCore/QSharedPointer>
 
 #include <QtGui/QTextCursor>
@@ -56,6 +57,10 @@ namespace TextEditor {
 } // namespace TextEditor
 
 namespace CppTools {
+
+class CppCompletionSupport;
+class CppHighlightingSupport;
+
 namespace Internal {
 
 class CppModelManager;
@@ -77,6 +82,9 @@ public:
     QString contents();
     unsigned editorRevision() const;
 
+    CppCompletionSupport *completionSupport() const;
+    CppHighlightingSupport *highlightingSupport() const;
+
 Q_SIGNALS:
     void contentsChanged();
 
@@ -94,6 +102,8 @@ private:
     QFuture<void> _documentParser;
     QString _cachedContents;
     unsigned _revision;
+    QScopedPointer<CppCompletionSupport> m_completionSupport;
+    QScopedPointer<CppHighlightingSupport> m_highlightingSupport;
 };
 
 } // namespace Internal