Clang: Add revision and completion management

Reparsing a document is expensive so we should avoid it by all means. In
this patch we prevent that the same document is send again. It isn't send
too in advance of a code completion if there was no changes before the
the completion position.

Change-Id: I0bb786ba1d4e7ce08611a518cb32f8cf8f4d0037
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/cpptools/editordocumenthandle.h

@@ -32,6 +32,10 @@
 #define EDITORDOCUMENTHANDLE_H
 
 #include "cpptools_global.h"
+#include "senddocumenttracker.h"
+
+#include <QMap>
+#include <QString>
 
 namespace CppTools {
 class BaseEditorDocumentProcessor;
@@ -55,7 +59,10 @@ public:
 
     virtual void resetProcessor() = 0;
 
+    SendDocumentTracker &sendTracker(const QString &projectPartId);
+
 private:
+    QMap<QString, SendDocumentTracker> m_documentRevisionManagements;
     bool m_needsRefresh;
 };