Clang: Merge highlighting/diagnostics messages

The messages

    RequestDiagnosticsMessage
    RequestHighlightingMessage

and

    DiagnosticsChangedMessage
    HighlightingChangedMessage

are always send/received together, so merge them into

    RequestDocumentAnnotationsMessage
    DocumentAnnotationsChangedMessage

Change-Id: I6a0b6281ed1e6efe6cb18386afe99b1d1fb58abf
Reviewed-by: Marco Bubke <marco.bubke@qt.io>
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@theqtcompany.com>

src/libs/clangbackendipc/requestdocumentannotations.cpp

@@ -0,0 +1,79 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** 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 The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "requestdocumentannotations.h"
+
+#include <QDataStream>
+#include <QDebug>
+
+#include <ostream>
+
+namespace ClangBackEnd {
+
+RequestDocumentAnnotationsMessage::RequestDocumentAnnotationsMessage(const FileContainer &file)
+    : fileContainer_(file)
+{
+}
+
+const FileContainer RequestDocumentAnnotationsMessage::fileContainer() const
+{
+    return fileContainer_;
+}
+
+QDataStream &operator<<(QDataStream &out, const RequestDocumentAnnotationsMessage &message)
+{
+    out << message.fileContainer_;
+
+    return out;
+}
+
+QDataStream &operator>>(QDataStream &in, RequestDocumentAnnotationsMessage &message)
+{
+    in >> message.fileContainer_;
+
+    return in;
+}
+
+bool operator==(const RequestDocumentAnnotationsMessage &first, const RequestDocumentAnnotationsMessage &second)
+{
+    return first.fileContainer_ == second.fileContainer_;
+}
+
+QDebug operator<<(QDebug debug, const RequestDocumentAnnotationsMessage &message)
+{
+    debug.nospace() << "RequestDocumentAnnotationsMessage("
+                    << message.fileContainer()
+                    << ")";
+
+    return debug;
+}
+
+void PrintTo(const RequestDocumentAnnotationsMessage &message, ::std::ostream* os)
+{
+    *os << message.fileContainer().filePath().constData()
+        << "(" << message.fileContainer().projectPartId().constData() << ")";
+}
+
+} // namespace ClangBackEnd