Merge CppTools into CppEditor

There was no proper separation of responsibilities between these
plugins. In particular, CppTools had lots of editor-related
functionality, so it's not clear why it was separated out in the first
place.
In fact, for a lot of code, it seemed quite arbitrary where it was put
(just one example: switchHeaderSource() was in CppTools, wheras
switchDeclarationDefinition() was in CppEditor).
Merging the plugins will enable us to get rid of various convoluted
pseudo-abstractions that were only introduced to keep up the artificial
separation.

Change-Id: Iafc3bce625b4794f6d4aa03df6cddc7f2d26716a
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cppeditor/cpprefactoringchanges.h

@@ -0,0 +1,99 @@
+/****************************************************************************
+**
+** 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.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "cppeditor_global.h"
+
+#include <cplusplus/CppDocument.h>
+
+#include <texteditor/refactoringchanges.h>
+
+namespace CppEditor {
+
+class CppRefactoringChanges;
+class CppRefactoringFile;
+class CppRefactoringChangesData;
+using CppRefactoringFilePtr = QSharedPointer<CppRefactoringFile>;
+using CppRefactoringFileConstPtr = QSharedPointer<const CppRefactoringFile>;
+
+class CPPEDITOR_EXPORT CppRefactoringFile: public TextEditor::RefactoringFile
+{
+public:
+    CPlusPlus::Document::Ptr cppDocument() const;
+    void setCppDocument(CPlusPlus::Document::Ptr document);
+
+    CPlusPlus::Scope *scopeAt(unsigned index) const;
+
+    bool isCursorOn(unsigned tokenIndex) const;
+    bool isCursorOn(const CPlusPlus::AST *ast) const;
+
+    Range range(int start, int end) const;
+    Range range(unsigned tokenIndex) const;
+    Range range(const CPlusPlus::AST *ast) const;
+
+    const CPlusPlus::Token &tokenAt(unsigned index) const;
+
+    int startOf(unsigned index) const;
+    int startOf(const CPlusPlus::AST *ast) const;
+    int endOf(unsigned index) const;
+    int endOf(const CPlusPlus::AST *ast) const;
+
+    void startAndEndOf(unsigned index, int *start, int *end) const;
+
+    using TextEditor::RefactoringFile::textOf;
+    QString textOf(const CPlusPlus::AST *ast) const;
+
+protected:
+    CppRefactoringFile(const Utils::FilePath &filePath, const QSharedPointer<TextEditor::RefactoringChangesData> &data);
+    CppRefactoringFile(QTextDocument *document, const Utils::FilePath &filePath);
+    explicit CppRefactoringFile(TextEditor::TextEditorWidget *editor);
+
+    CppRefactoringChangesData *data() const;
+    void fileChanged() override;
+
+    mutable CPlusPlus::Document::Ptr m_cppDocument;
+
+    friend class CppRefactoringChanges; // for access to constructor
+};
+
+class CPPEDITOR_EXPORT CppRefactoringChanges: public TextEditor::RefactoringChanges
+{
+public:
+    explicit CppRefactoringChanges(const CPlusPlus::Snapshot &snapshot);
+
+    static CppRefactoringFilePtr file(TextEditor::TextEditorWidget *editor,
+                                      const CPlusPlus::Document::Ptr &document);
+    CppRefactoringFilePtr file(const Utils::FilePath &filePath) const;
+    // safe to use from non-gui threads
+    CppRefactoringFileConstPtr fileNoEditor(const Utils::FilePath &filePath) const;
+
+    const CPlusPlus::Snapshot &snapshot() const;
+
+private:
+    CppRefactoringChangesData *data() const;
+};
+
+} // namespace CppEditor