CppEditor: Generalize CppUseSelectionsUpdater

Let CppUseSelectionsUpdater delegate the work to
*EditorDocumentProcessor so that the clang code model can also provide
results.

Change-Id: I6872afbfeea1a5c4a64fdf19fcb1992f134dde08
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/cpptools/cppcursorinfo.h

@@ -0,0 +1,69 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "cpptools_global.h"
+
+#include "cppsemanticinfo.h"
+
+#include <QTextCursor>
+#include <QVector>
+
+namespace CppTools {
+
+class CPPTOOLS_EXPORT CursorInfoParams
+{
+public:
+    CppTools::SemanticInfo semanticInfo;
+    QTextCursor textCursor;
+};
+
+class CPPTOOLS_EXPORT CursorInfo
+{
+public:
+    struct Range {
+        Range() = default;
+        Range(unsigned line, unsigned column, unsigned length)
+            : line(line)
+            , column(column)
+            , length(length)
+        {
+        }
+
+        unsigned line = 0; // 1-based
+        unsigned column = 0; // 1-based
+        unsigned length = 0;
+    };
+    using Ranges = QVector<Range>;
+
+    Ranges useRanges;
+    bool areUseRangesForLocalVariable = false;
+
+    Ranges unusedVariablesRanges;
+    SemanticInfo::LocalUseMap localUses;
+};
+
+} // namespace CppTools