CppEditor: Remove RefactoringEngine

Another useless indirection.

Change-Id: Icfcc0704a1056d8002a674edbe74b946cb56ff27
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

20 files changed, 195 insertions, 493 deletions

diff --git a/src/plugins/clangcodemodel/CMakeLists.txt b/src/plugins/clangcodemodel/CMakeLists.txt
index 31533298c69..4adc57a0d4d 100644
--- a/src/plugins/clangcodemodel/CMakeLists.txt
+++ b/src/plugins/clangcodemodel/CMakeLists.txt
@@ -26,7 +26,6 @@ add_qtc_plugin(ClangCodeModel
     clangpreprocessorassistproposalitem.cpp clangpreprocessorassistproposalitem.h
     clangprojectsettings.cpp clangprojectsettings.h
     clangprojectsettingswidget.cpp clangprojectsettingswidget.h clangprojectsettingswidget.ui
-    clangrefactoringengine.cpp clangrefactoringengine.h
     clangtextmark.cpp clangtextmark.h
     clanguiheaderondiskmanager.cpp clanguiheaderondiskmanager.h
     clangutils.cpp clangutils.h
diff --git a/src/plugins/clangcodemodel/clangcodemodel.qbs b/src/plugins/clangcodemodel/clangcodemodel.qbs
index 48f4ae846d4..1ad7223b1ae 100644
--- a/src/plugins/clangcodemodel/clangcodemodel.qbs
+++ b/src/plugins/clangcodemodel/clangcodemodel.qbs
@@ -59,8 +59,6 @@ QtcPlugin {
         "clangprojectsettingswidget.cpp",
         "clangprojectsettingswidget.h",
         "clangprojectsettingswidget.ui",
-        "clangrefactoringengine.cpp",
-        "clangrefactoringengine.h",
         "clangtextmark.cpp",
         "clangtextmark.h",
         "clanguiheaderondiskmanager.cpp",
diff --git a/src/plugins/clangcodemodel/clangdclient.cpp b/src/plugins/clangcodemodel/clangdclient.cpp
index b6c0ff9890f..e48d9ea7824 100644
--- a/src/plugins/clangcodemodel/clangdclient.cpp
+++ b/src/plugins/clangcodemodel/clangdclient.cpp
@@ -826,7 +826,7 @@ public:
 class LocalRefsData {
 public:
     LocalRefsData(quint64 id, TextDocument *doc, const QTextCursor &cursor,
-                  CppEditor::RefactoringEngineInterface::RenameCallback &&callback)
+                  CppEditor::RenameCallback &&callback)
         : id(id), document(doc), cursor(cursor), callback(std::move(callback)),
           uri(DocumentUri::fromFilePath(doc->filePath())), revision(doc->document()->revision())
     {}
@@ -840,7 +840,7 @@ public:
     const quint64 id;
     const QPointer<TextDocument> document;
     const QTextCursor cursor;
-    CppEditor::RefactoringEngineInterface::RenameCallback callback;
+    CppEditor::RenameCallback callback;
     const DocumentUri uri;
     const int revision;
 };
@@ -2187,7 +2187,7 @@ void ClangdClient::switchDeclDef(TextDocument *document, const QTextCursor &curs
 }
 
 void ClangdClient::findLocalUsages(TextDocument *document, const QTextCursor &cursor,
-        CppEditor::RefactoringEngineInterface::RenameCallback &&callback)
+        CppEditor::RenameCallback &&callback)
 {
     QTC_ASSERT(documentOpen(document), openDocument(document));
 
diff --git a/src/plugins/clangcodemodel/clangdclient.h b/src/plugins/clangcodemodel/clangdclient.h
index aa67e3c7898..5532b4fed29 100644
--- a/src/plugins/clangcodemodel/clangdclient.h
+++ b/src/plugins/clangcodemodel/clangdclient.h
@@ -27,7 +27,7 @@
 
 #include <cppeditor/baseeditordocumentparser.h>
 #include <cppeditor/cppcodemodelsettings.h>
-#include <cppeditor/refactoringengineinterface.h>
+#include <cppeditor/cursorineditor.h>
 #include <languageclient/client.h>
 #include <utils/link.h>
 #include <utils/optional.h>
@@ -74,7 +74,7 @@ public:
             Utils::ProcessLinkCallback &&callback);
 
     void findLocalUsages(TextEditor::TextDocument *document, const QTextCursor &cursor,
-                         CppEditor::RefactoringEngineInterface::RenameCallback &&callback);
+                         CppEditor::RenameCallback &&callback);
 
     void gatherHelpItemForTooltip(
             const LanguageServerProtocol::HoverRequest::Response &hoverResponse,
diff --git a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
index 9ab0c7e4178..15cb17d9fc1 100644
--- a/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
+++ b/src/plugins/clangcodemodel/clangmodelmanagersupport.cpp
@@ -31,7 +31,6 @@
 #include "clangeditordocumentprocessor.h"
 #include "clangdlocatorfilters.h"
 #include "clangprojectsettings.h"
-#include "clangrefactoringengine.h"
 #include "clangutils.h"
 
 #include <coreplugin/documentmanager.h>
@@ -49,7 +48,6 @@
 #include <cppeditor/cppprojectfile.h>
 #include <cppeditor/cpptoolsreuse.h>
 #include <cppeditor/editordocumenthandle.h>
-#include <cppeditor/symbolfinder.h>
 
 #include <languageclient/languageclientmanager.h>
 
@@ -104,7 +102,7 @@ static const QList<TextEditor::TextDocument *> allCppDocuments()
     return Utils::qobject_container_cast<TextEditor::TextDocument *>(documents);
 }
 
-ClangModelManagerSupport::ClangModelManagerSupport() : m_refactoringEngine(new RefactoringEngine)
+ClangModelManagerSupport::ClangModelManagerSupport()
 {
     QTC_CHECK(!m_instance);
     m_instance = this;
@@ -189,10 +187,8 @@ void ClangModelManagerSupport::followSymbol(const CppEditor::CursorInEditor &dat
         return;
     }
 
-    SymbolFinder finder;
-    CppModelManager::builtinFollowSymbol().findLink(data, std::move(processLinkCallback),
-            resolveTarget, CppModelManager::instance()->snapshot(),
-            data.editorWidget()->semanticInfo().doc, &finder, inNextSplit);
+    CppModelManager::followSymbol(data, std::move(processLinkCallback), resolveTarget, inNextSplit,
+                                  CppModelManager::Backend::Builtin);
 }
 
 void ClangModelManagerSupport::switchDeclDef(const CppEditor::CursorInEditor &data,
@@ -205,15 +201,52 @@ void ClangModelManagerSupport::switchDeclDef(const CppEditor::CursorInEditor &da
         return;
     }
 
-    SymbolFinder finder;
-    CppModelManager::builtinFollowSymbol().switchDeclDef(data, std::move(processLinkCallback),
-            CppModelManager::instance()->snapshot(), data.editorWidget()->semanticInfo().doc,
-            &finder);
+    CppModelManager::switchDeclDef(data, std::move(processLinkCallback),
+                                   CppModelManager::Backend::Builtin);
 }
 
-CppEditor::RefactoringEngineInterface &ClangModelManagerSupport::refactoringEngineInterface()
+void ClangModelManagerSupport::startLocalRenaming(const CppEditor::CursorInEditor &data,
+                                           const CppEditor::ProjectPart *projectPart,
+                                           RenameCallback &&renameSymbolsCallback)
 {
-    return *m_refactoringEngine;
+    if (ClangdClient * const client = clientForFile(data.filePath());
+            client && client->reachable()) {
+        client->findLocalUsages(data.textDocument(), data.cursor(),
+                                std::move(renameSymbolsCallback));
+        return;
+    }
+
+    CppModelManager::startLocalRenaming(data, projectPart,
+            std::move(renameSymbolsCallback), CppModelManager::Backend::Builtin);
+}
+
+void ClangModelManagerSupport::globalRename(const CppEditor::CursorInEditor &cursor,
+                                     CppEditor::UsagesCallback &&callback,
+                                     const QString &replacement)
+{
+    if (ClangdClient * const client = clientForFile(cursor.filePath());
+            client && client->isFullyIndexed()) {
+        QTC_ASSERT(client->documentOpen(cursor.textDocument()),
+                   client->openDocument(cursor.textDocument()));
+        client->findUsages(cursor.textDocument(), cursor.cursor(), replacement);
+        return;
+    }
+    CppModelManager::globalRename(cursor, std::move(callback), replacement,
+                                  CppModelManager::Backend::Builtin);
+}
+
+void ClangModelManagerSupport::findUsages(const CppEditor::CursorInEditor &cursor,
+                                   CppEditor::UsagesCallback &&callback) const
+{
+    if (ClangdClient * const client = clientForFile(cursor.filePath());
+            client && client->isFullyIndexed()) {
+        QTC_ASSERT(client->documentOpen(cursor.textDocument()),
+                   client->openDocument(cursor.textDocument()));
+        client->findUsages(cursor.textDocument(), cursor.cursor(), {});
+
+        return;
+    }
+    CppModelManager::findUsages(cursor, std::move(callback), CppModelManager::Backend::Builtin);
 }
 
 std::unique_ptr<CppEditor::AbstractOverviewModel> ClangModelManagerSupport::createOverviewModel()
diff --git a/src/plugins/clangcodemodel/clangmodelmanagersupport.h b/src/plugins/clangcodemodel/clangmodelmanagersupport.h
index 8ffbe9041ed..7f0749e3d68 100644
--- a/src/plugins/clangcodemodel/clangmodelmanagersupport.h
+++ b/src/plugins/clangcodemodel/clangmodelmanagersupport.h
@@ -68,7 +68,6 @@ public:
     TextEditor::BaseHoverHandler *createHoverHandler() override { return nullptr; }
     CppEditor::BaseEditorDocumentProcessor *createEditorDocumentProcessor(
                 TextEditor::TextDocument *baseTextDocument) override;
-    CppEditor::RefactoringEngineInterface &refactoringEngineInterface() override;
     std::unique_ptr<CppEditor::AbstractOverviewModel> createOverviewModel() override;
     bool supportsOutline(const TextEditor::TextDocument *document) const override;
     bool supportsLocalUses(const TextEditor::TextDocument *document) const override;
@@ -93,6 +92,13 @@ private:
                       bool inNextSplit) override;
     void switchDeclDef(const CppEditor::CursorInEditor &data,
                        Utils::ProcessLinkCallback &&processLinkCallback) override;
+    void startLocalRenaming(const CppEditor::CursorInEditor &data,
+                            const CppEditor::ProjectPart *projectPart,
+                            CppEditor::RenameCallback &&renameSymbolsCallback) override;
+    void globalRename(const CppEditor::CursorInEditor &cursor, CppEditor::UsagesCallback &&callback,
+                      const QString &replacement) override;
+    void findUsages(const CppEditor::CursorInEditor &cursor,
+                    CppEditor::UsagesCallback &&callback) const override;
 
     void onEditorOpened(Core::IEditor *editor);
     void onCurrentEditorChanged(Core::IEditor *newCurrent);
@@ -128,7 +134,6 @@ private:
     void watchForInternalChanges();
 
     UiHeaderOnDiskManager m_uiHeaderOnDiskManager;
-    std::unique_ptr<CppEditor::RefactoringEngineInterface> m_refactoringEngine;
 
     QHash<ProjectExplorer::Project *, ClangProjectSettings *> m_projectSettings;
     Utils::FutureSynchronizer m_generatorSynchronizer;
diff --git a/src/plugins/clangcodemodel/clangrefactoringengine.cpp b/src/plugins/clangcodemodel/clangrefactoringengine.cpp
deleted file mode 100644
index 1edb6f6ae21..00000000000
--- a/src/plugins/clangcodemodel/clangrefactoringengine.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-/****************************************************************************
-**
-** 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 "clangrefactoringengine.h"
-
-#include "clangdclient.h"
-#include "clangmodelmanagersupport.h"
-
-#include <cppeditor/cppmodelmanager.h>
-#include <languageclient/languageclientsymbolsupport.h>
-#include <utils/textutils.h>
-#include <utils/qtcassert.h>
-
-namespace ClangCodeModel {
-namespace Internal {
-
-void RefactoringEngine::startLocalRenaming(const CppEditor::CursorInEditor &data,
-                                           const CppEditor::ProjectPart *projectPart,
-                                           RenameCallback &&renameSymbolsCallback)
-{
-    ClangdClient * const client
-            = ClangModelManagerSupport::instance()->clientForFile(data.filePath());
-    if (client && client->reachable()) {
-        client->findLocalUsages(data.textDocument(), data.cursor(),
-                                std::move(renameSymbolsCallback));
-        return;
-    }
-
-    CppEditor::CppModelManager::builtinRefactoringEngine()
-            ->startLocalRenaming(data, projectPart, std::move(renameSymbolsCallback));
-}
-
-void RefactoringEngine::globalRename(const CppEditor::CursorInEditor &cursor,
-                                     CppEditor::UsagesCallback &&callback,
-                                     const QString &replacement)
-{
-    ClangdClient * const client
-            = ClangModelManagerSupport::instance()->clientForFile(cursor.filePath());
-    if (!client || !client->isFullyIndexed()) {
-        CppEditor::CppModelManager::builtinRefactoringEngine()
-                ->globalRename(cursor, std::move(callback), replacement);
-        return;
-    }
-    QTC_ASSERT(client->documentOpen(cursor.textDocument()),
-               client->openDocument(cursor.textDocument()));
-    client->findUsages(cursor.textDocument(), cursor.cursor(), replacement);
-}
-
-void RefactoringEngine::findUsages(const CppEditor::CursorInEditor &cursor,
-                                   CppEditor::UsagesCallback &&callback) const
-{
-    ClangdClient * const client
-            = ClangModelManagerSupport::instance()->clientForFile(cursor.filePath());
-    if (!client || !client->isFullyIndexed()) {
-        CppEditor::CppModelManager::builtinRefactoringEngine()
-                ->findUsages(cursor, std::move(callback));
-        return;
-    }
-    QTC_ASSERT(client->documentOpen(cursor.textDocument()),
-               client->openDocument(cursor.textDocument()));
-    client->findUsages(cursor.textDocument(), cursor.cursor(), {});
-}
-
-} // namespace Internal
-} // namespace ClangCodeModel
diff --git a/src/plugins/clangcodemodel/clangrefactoringengine.h b/src/plugins/clangcodemodel/clangrefactoringengine.h
deleted file mode 100644
index 407e267b8eb..00000000000
--- a/src/plugins/clangcodemodel/clangrefactoringengine.h
+++ /dev/null
@@ -1,58 +0,0 @@
-/****************************************************************************
-**
-** 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/refactoringengineinterface.h>
-#include <cppeditor/cppcursorinfo.h>
-
-#include <QFutureWatcher>
-
-namespace ClangBackEnd {
-class RefactoringClientInterface;
-class RefactoringServerInterface;
-}
-
-namespace ClangCodeModel {
-namespace Internal {
-
-class RefactoringEngine : public CppEditor::RefactoringEngineInterface
-{
-public:
-    void startLocalRenaming(const CppEditor::CursorInEditor &data,
-                            const CppEditor::ProjectPart *projectPart,
-                            RenameCallback &&renameSymbolsCallback) override;
-    void globalRename(const CppEditor::CursorInEditor &cursor, CppEditor::UsagesCallback &&callback,
-                      const QString &replacement) override;
-    void findUsages(const CppEditor::CursorInEditor &cursor,
-                    CppEditor::UsagesCallback &&callback) const override;
-
-private:
-    using FutureCursorWatcher = QFutureWatcher<CppEditor::CursorInfo>;
-    std::unique_ptr<FutureCursorWatcher> m_watcher;
-};
-
-} // namespace Internal
-} // namespace ClangRefactoring
diff --git a/src/plugins/cppeditor/CMakeLists.txt b/src/plugins/cppeditor/CMakeLists.txt
index 7a4d9d68038..e8858620967 100644
--- a/src/plugins/cppeditor/CMakeLists.txt
+++ b/src/plugins/cppeditor/CMakeLists.txt
@@ -85,7 +85,6 @@ add_qtc_plugin(CppEditor
     cppquickfixsettingspage.cpp cppquickfixsettingspage.h
     cppquickfixsettingswidget.cpp cppquickfixsettingswidget.h cppquickfixsettingswidget.ui
     cpprefactoringchanges.cpp cpprefactoringchanges.h
-    cpprefactoringengine.cpp cpprefactoringengine.h
     cppselectionchanger.cpp cppselectionchanger.h
     cppsemanticinfo.h
     cppsemanticinfoupdater.cpp cppsemanticinfoupdater.h
@@ -109,7 +108,6 @@ add_qtc_plugin(CppEditor
     insertionpointlocator.cpp insertionpointlocator.h
     projectinfo.cpp projectinfo.h
     projectpart.cpp projectpart.h
-    refactoringengineinterface.h
     resourcepreviewhoverhandler.cpp resourcepreviewhoverhandler.h
     searchsymbols.cpp searchsymbols.h
     semantichighlighter.cpp semantichighlighter.h
diff --git a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
index ed9defff588..34d3c65efea 100644
--- a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
+++ b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.cpp
@@ -26,18 +26,20 @@
 #include "cppbuiltinmodelmanagersupport.h"
 
 #include "builtineditordocumentprocessor.h"
+#include "cppcanonicalsymbol.h"
 #include "cppcompletionassist.h"
 #include "cppeditorwidget.h"
 #include "cppelementevaluator.h"
 #include "cppfollowsymbolundercursor.h"
 #include "cppoverviewmodel.h"
-#include "cpprefactoringengine.h"
 #include "cpptoolsreuse.h"
 #include "symbolfinder.h"
 
 #include <app/app_version.h>
+#include <clangsupport/sourcelocationscontainer.h>
 #include <texteditor/basehoverhandler.h>
 #include <utils/executeondestruction.h>
+#include <utils/qtcassert.h>
 
 #include <QCoreApplication>
 
@@ -105,8 +107,7 @@ ModelManagerSupport::Ptr BuiltinModelManagerSupportProvider::createModelManagerS
 
 BuiltinModelManagerSupport::BuiltinModelManagerSupport()
     : m_completionAssistProvider(new InternalCompletionAssistProvider),
-      m_followSymbol(new FollowSymbolUnderCursor),
-      m_refactoringEngine(new CppRefactoringEngine)
+      m_followSymbol(new FollowSymbolUnderCursor)
 {
 }
 
@@ -134,11 +135,6 @@ TextEditor::BaseHoverHandler *BuiltinModelManagerSupport::createHoverHandler()
     return new CppHoverHandler;
 }
 
-RefactoringEngineInterface &BuiltinModelManagerSupport::refactoringEngineInterface()
-{
-    return *m_refactoringEngine;
-}
-
 std::unique_ptr<AbstractOverviewModel> BuiltinModelManagerSupport::createOverviewModel()
 {
     return std::make_unique<OverviewModel>();
@@ -163,4 +159,68 @@ void BuiltinModelManagerSupport::switchDeclDef(const CursorInEditor &data,
             &finder);
 }
 
+void BuiltinModelManagerSupport::startLocalRenaming(const CursorInEditor &data,
+                                                    const ProjectPart *,
+                                                    RenameCallback &&renameSymbolsCallback)
+{
+    CppEditorWidget *editorWidget = data.editorWidget();
+    QTC_ASSERT(editorWidget, renameSymbolsCallback(QString(),
+                                                   ClangBackEnd::SourceLocationsContainer(),
+                                                   0); return;);
+    editorWidget->updateSemanticInfo();
+    // Call empty callback
+    renameSymbolsCallback(QString(),
+                          ClangBackEnd::SourceLocationsContainer(),
+                          data.cursor().document()->revision());
+}
+
+void BuiltinModelManagerSupport::globalRename(const CursorInEditor &data,
+                                              UsagesCallback &&,
+                                              const QString &replacement)
+{
+    CppModelManager *modelManager = CppModelManager::instance();
+    if (!modelManager)
+        return;
+
+    CppEditorWidget *editorWidget = data.editorWidget();
+    QTC_ASSERT(editorWidget, return;);
+
+    SemanticInfo info = editorWidget->semanticInfo();
+    info.snapshot = modelManager->snapshot();
+    info.snapshot.insert(info.doc);
+    const QTextCursor &cursor = data.cursor();
+    if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
+        modelManager->renameMacroUsages(*macro, replacement);
+    } else {
+        Internal::CanonicalSymbol cs(info.doc, info.snapshot);
+        CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
+        if (canonicalSymbol)
+            modelManager->renameUsages(canonicalSymbol, cs.context(), replacement);
+    }
+}
+
+void BuiltinModelManagerSupport::findUsages(const CursorInEditor &data,
+                                      UsagesCallback &&) const
+{
+    CppModelManager *modelManager = CppModelManager::instance();
+    if (!modelManager)
+        return;
+
+    CppEditorWidget *editorWidget = data.editorWidget();
+    QTC_ASSERT(editorWidget, return;);
+
+    SemanticInfo info = editorWidget->semanticInfo();
+    info.snapshot = modelManager->snapshot();
+    info.snapshot.insert(info.doc);
+    const QTextCursor &cursor = data.cursor();
+    if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
+        modelManager->findMacroUsages(*macro);
+    } else {
+        Internal::CanonicalSymbol cs(info.doc, info.snapshot);
+        CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
+        if (canonicalSymbol)
+            modelManager->findUsages(canonicalSymbol, cs.context());
+    }
+}
+
 } // namespace CppEditor::Internal
diff --git a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.h b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.h
index bd4b2cf8638..66ec4f5ca0c 100644
--- a/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.h
+++ b/src/plugins/cppeditor/cppbuiltinmodelmanagersupport.h
@@ -46,7 +46,6 @@ public:
     TextEditor::BaseHoverHandler *createHoverHandler() final;
     BaseEditorDocumentProcessor *createEditorDocumentProcessor(
             TextEditor::TextDocument *baseTextDocument) final;
-    RefactoringEngineInterface &refactoringEngineInterface() final;
     std::unique_ptr<AbstractOverviewModel> createOverviewModel() final;
 
     FollowSymbolUnderCursor &followSymbolInterface() { return *m_followSymbol; }
@@ -56,10 +55,15 @@ private:
                       bool resolveTarget, bool inNextSplit) override;
     void switchDeclDef(const CursorInEditor &data,
                        Utils::ProcessLinkCallback &&processLinkCallback) override;
+    void startLocalRenaming(const CursorInEditor &data,
+                            const ProjectPart *projectPart,
+                            RenameCallback &&renameSymbolsCallback) override;
+    void globalRename(const CursorInEditor &data, UsagesCallback &&,
+                      const QString &replacement) override;
+    void findUsages(const CursorInEditor &data, UsagesCallback &&) const override;
 
     QScopedPointer<CppCompletionAssistProvider> m_completionAssistProvider;
     QScopedPointer<FollowSymbolUnderCursor> m_followSymbol;
-    QScopedPointer<RefactoringEngineInterface> m_refactoringEngine;
 };
 
 class BuiltinModelManagerSupportProvider : public ModelManagerSupportProvider
diff --git a/src/plugins/cppeditor/cppeditor.qbs b/src/plugins/cppeditor/cppeditor.qbs
index bd93199cd27..9941a54c50e 100644
--- a/src/plugins/cppeditor/cppeditor.qbs
+++ b/src/plugins/cppeditor/cppeditor.qbs
@@ -189,8 +189,6 @@ QtcPlugin {
         "cppqtstyleindenter.h",
         "cpprefactoringchanges.cpp",
         "cpprefactoringchanges.h",
-        "cpprefactoringengine.cpp",
-        "cpprefactoringengine.h",
         "cppselectionchanger.cpp",
         "cppselectionchanger.h",
         "cppsemanticinfo.h",
@@ -235,7 +233,6 @@ QtcPlugin {
         "projectinfo.h",
         "projectpart.cpp",
         "projectpart.h",
-        "refactoringengineinterface.h",
         "resourcepreviewhoverhandler.cpp",
         "resourcepreviewhoverhandler.h",
         "searchsymbols.cpp",
diff --git a/src/plugins/cppeditor/cppeditorwidget.cpp b/src/plugins/cppeditor/cppeditorwidget.cpp
index e77272efe56..36524e663ef 100644
--- a/src/plugins/cppeditor/cppeditorwidget.cpp
+++ b/src/plugins/cppeditor/cppeditorwidget.cpp
@@ -50,7 +50,6 @@
 #include "cpptoolssettings.h"
 #include "cppuseselectionsupdater.h"
 #include "cppworkingcopy.h"
-#include "refactoringengineinterface.h"
 #include "symbolfinder.h"
 
 #include <clangsupport/sourcelocationscontainer.h>
@@ -1044,7 +1043,7 @@ void CppEditorWidget::switchDeclarationDefinition(bool inNextSplit)
         if (self && link.hasValidTarget())
             self->openLink(link, split);
     };
-    CppModelManager::instance()->switchDeclDef(cursor, std::move(callback));
+    CppModelManager::switchDeclDef(cursor, std::move(callback));
 }
 
 void CppEditorWidget::findLinkAt(const QTextCursor &cursor,
@@ -1084,7 +1083,7 @@ void CppEditorWidget::findLinkAt(const QTextCursor &cursor,
         }
         callback(link);
     };
-    CppModelManager::instance()->followSymbol(
+    CppModelManager::followSymbol(
                 CursorInEditor{cursor, filePath, this, textDocument()},
                 std::move(callbackWrapper),
                 resolveTarget,
diff --git a/src/plugins/cppeditor/cppmodelmanager.cpp b/src/plugins/cppeditor/cppmodelmanager.cpp
index 1ab7d1b3b37..4a3963136c2 100644
--- a/src/plugins/cppeditor/cppmodelmanager.cpp
+++ b/src/plugins/cppeditor/cppmodelmanager.cpp
@@ -40,7 +40,6 @@
 #include "cpplocatorfilter.h"
 #include "cppbuiltinmodelmanagersupport.h"
 #include "cpprefactoringchanges.h"
-#include "cpprefactoringengine.h"
 #include "cppsourceprocessor.h"
 #include "cpptoolsjsextension.h"
 #include "cpptoolsreuse.h"
@@ -136,8 +135,6 @@ protected:
 
 namespace CppEditor {
 
-using REType = RefactoringEngineType;
-
 namespace Internal {
 
 static CppModelManager *m_instance;
@@ -197,10 +194,6 @@ public:
     QTimer m_delayedGcTimer;
     QTimer m_fallbackProjectPartTimer;
 
-    // Refactoring
-    using REHash = QMap<REType, RefactoringEngineInterface *>;
-    REHash m_refactoringEngines;
-
     CppLocatorData m_locatorData;
     std::unique_ptr<Core::ILocatorFilter> m_locatorFilter;
     std::unique_ptr<Core::ILocatorFilter> m_classesFilter;
@@ -308,43 +301,32 @@ QString CppModelManager::editorConfigurationFileName()
     return QLatin1String("<per-editor-defines>");
 }
 
-static RefactoringEngineInterface *getRefactoringEngine(CppModelManagerPrivate::REHash &engines)
+ModelManagerSupport *CppModelManager::modelManagerSupport(Backend backend) const
 {
-    QTC_ASSERT(!engines.empty(), return nullptr;);
-    RefactoringEngineInterface *currentEngine = engines[REType::BuiltIn];
-    if (engines.find(REType::ClangCodeModel) != engines.end()) {
-        currentEngine = engines[REType::ClangCodeModel];
-    } else if (engines.find(REType::ClangRefactoring) != engines.end()) {
-        RefactoringEngineInterface *engine = engines[REType::ClangRefactoring];
-        if (engine->isRefactoringEngineAvailable())
-            currentEngine = engine;
-    }
-    return currentEngine;
+    return (backend == Backend::Builtin
+            ? d->m_builtinModelManagerSupport : d->m_activeModelManagerSupport).data();
 }
 
 void CppModelManager::startLocalRenaming(const CursorInEditor &data,
                                          const ProjectPart *projectPart,
-                                         RenameCallback &&renameSymbolsCallback)
+                                         RenameCallback &&renameSymbolsCallback,
+                                         Backend backend)
 {
-    RefactoringEngineInterface *engine = getRefactoringEngine(d->m_refactoringEngines);
-    QTC_ASSERT(engine, return;);
-    engine->startLocalRenaming(data, projectPart, std::move(renameSymbolsCallback));
+    instance()->modelManagerSupport(backend)
+            ->startLocalRenaming(data, projectPart, std::move(renameSymbolsCallback));
 }
 
 void CppModelManager::globalRename(const CursorInEditor &data, UsagesCallback &&renameCallback,
-                                   const QString &replacement)
+                                   const QString &replacement, Backend backend)
 {
-    RefactoringEngineInterface *engine = getRefactoringEngine(d->m_refactoringEngines);
-    QTC_ASSERT(engine, return;);
-    engine->globalRename(data, std::move(renameCallback), replacement);
+    instance()->modelManagerSupport(backend)
+            ->globalRename(data, std::move(renameCallback), replacement);
 }
 
 void CppModelManager::findUsages(const CursorInEditor &data,
-                                 UsagesCallback &&showUsagesCallback) const
+                                 UsagesCallback &&showUsagesCallback, Backend backend)
 {
-    RefactoringEngineInterface *engine = getRefactoringEngine(d->m_refactoringEngines);
-    QTC_ASSERT(engine, return;);
-    engine->findUsages(data, std::move(showUsagesCallback));
+    instance()->modelManagerSupport(backend)->findUsages(data, std::move(showUsagesCallback));
 }
 
 bool CppModelManager::positionRequiresSignal(const QString &filePath, const QByteArray &content,
@@ -456,22 +438,6 @@ bool CppModelManager::positionRequiresSignal(const QString &filePath, const QByt
     return false;
 }
 
-void CppModelManager::addRefactoringEngine(RefactoringEngineType type,
-                                           RefactoringEngineInterface *refactoringEngine)
-{
-    instance()->d->m_refactoringEngines[type] = refactoringEngine;
-}
-
-void CppModelManager::removeRefactoringEngine(RefactoringEngineType type)
-{
-    instance()->d->m_refactoringEngines.remove(type);
-}
-
-RefactoringEngineInterface *CppModelManager::builtinRefactoringEngine()
-{
-    return instance()->d->m_refactoringEngines.value(RefactoringEngineType::BuiltIn);
-}
-
 FollowSymbolUnderCursor &CppModelManager::builtinFollowSymbol()
 {
     return instance()->d->m_builtinModelManagerSupport.staticCast<BuiltinModelManagerSupport>()
@@ -622,8 +588,6 @@ void CppModelManager::initializeBuiltinModelManagerSupport()
     d->m_builtinModelManagerSupport
             = BuiltinModelManagerSupportProvider().createModelManagerSupport();
     d->m_activeModelManagerSupport = d->m_builtinModelManagerSupport;
-    d->m_refactoringEngines[RefactoringEngineType::BuiltIn] =
-            &d->m_activeModelManagerSupport->refactoringEngineInterface();
 }
 
 CppModelManager::CppModelManager()
@@ -1647,8 +1611,6 @@ void CppModelManager::activateClangCodeModel(
     QTC_ASSERT(modelManagerSupportProvider, return);
 
     d->m_activeModelManagerSupport = modelManagerSupportProvider->createModelManagerSupport();
-    d->m_refactoringEngines[RefactoringEngineType::ClangCodeModel] =
-            &d->m_activeModelManagerSupport->refactoringEngineInterface();
 }
 
 CppCompletionAssistProvider *CppModelManager::completionAssistProvider() const
@@ -1668,16 +1630,17 @@ TextEditor::BaseHoverHandler *CppModelManager::createHoverHandler() const
 
 void CppModelManager::followSymbol(const CursorInEditor &data,
                                    Utils::ProcessLinkCallback &&processLinkCallback,
-                                   bool resolveTarget, bool inNextSplit)
+                                   bool resolveTarget, bool inNextSplit, Backend backend)
 {
-    d->m_activeModelManagerSupport->followSymbol(data, std::move(processLinkCallback),
-                                                 resolveTarget, inNextSplit);
+    instance()->modelManagerSupport(backend)->followSymbol(data, std::move(processLinkCallback),
+                                                           resolveTarget, inNextSplit);
 }
 
 void CppModelManager::switchDeclDef(const CursorInEditor &data,
-                                    Utils::ProcessLinkCallback &&processLinkCallback)
+                                    Utils::ProcessLinkCallback &&processLinkCallback,
+                                    Backend backend)
 {
-    d->m_activeModelManagerSupport->switchDeclDef(data, std::move(processLinkCallback));
+    instance()->modelManagerSupport(backend)->switchDeclDef(data, std::move(processLinkCallback));
 }
 
 Core::ILocatorFilter *CppModelManager::createAuxiliaryCurrentDocumentFilter()
diff --git a/src/plugins/cppeditor/cppmodelmanager.h b/src/plugins/cppeditor/cppmodelmanager.h
index f66228cc92d..4b56d03e985 100644
--- a/src/plugins/cppeditor/cppmodelmanager.h
+++ b/src/plugins/cppeditor/cppmodelmanager.h
@@ -27,14 +27,16 @@
 
 #include "cppeditor_global.h"
 
-#include "refactoringengineinterface.h"
+#include "cursorineditor.h"
 #include "projectinfo.h"
 #include "projectpart.h"
-#include <projectexplorer/headerpath.h>
+#include "usages.h"
 
 #include <cplusplus/cppmodelmanagerbase.h>
 #include <coreplugin/find/ifindfilter.h>
 #include <coreplugin/locator/ilocatorfilter.h>
+#include <projectexplorer/headerpath.h>
+#include <utils/link.h>
 
 #include <QFuture>
 #include <QObject>
@@ -62,6 +64,7 @@ class CppIndexingSupport;
 class CppLocatorData;
 class FollowSymbolUnderCursor;
 class ModelManagerSupportProvider;
+class ModelManagerSupport;
 class SymbolFinder;
 class WorkingCopy;
 
@@ -73,15 +76,7 @@ class CppModelManagerPrivate;
 
 namespace Tests { class ModelManagerTestHelper; }
 
-enum class RefactoringEngineType : int
-{
-    BuiltIn = 0,
-    ClangCodeModel = 1,
-    ClangRefactoring = 2
-};
-
-class CPPEDITOR_EXPORT CppModelManager final : public CPlusPlus::CppModelManagerBase,
-        public RefactoringEngineInterface
+class CPPEDITOR_EXPORT CppModelManager final : public CPlusPlus::CppModelManagerBase
 {
     Q_OBJECT
 
@@ -156,14 +151,6 @@ public:
 
     QList<int> references(CPlusPlus::Symbol *symbol, const CPlusPlus::LookupContext &context);
 
-    void startLocalRenaming(const CursorInEditor &data,
-                            const ProjectPart *projectPart,
-                            RenameCallback &&renameSymbolsCallback) final;
-    void globalRename(const CursorInEditor &data, UsagesCallback &&renameCallback,
-                      const QString &replacement) final;
-    void findUsages(const CursorInEditor &data,
-                    UsagesCallback &&showUsagesCallback) const final;
-
     bool positionRequiresSignal(const QString &filePath, const QByteArray &content,
                                 int position) const;
 
@@ -183,10 +170,22 @@ public:
                     TextEditor::TextDocument *baseTextDocument) const;
     TextEditor::BaseHoverHandler *createHoverHandler() const;
     static FollowSymbolUnderCursor &builtinFollowSymbol();
-    void followSymbol(const CursorInEditor &data, Utils::ProcessLinkCallback &&processLinkCallback,
-                      bool resolveTarget, bool inNextSplit);
-    void switchDeclDef(const CursorInEditor &data,
-                       Utils::ProcessLinkCallback &&processLinkCallback);
+
+    enum class Backend { Builtin, Best };
+    static void followSymbol(const CursorInEditor &data,
+                             Utils::ProcessLinkCallback &&processLinkCallback,
+                             bool resolveTarget, bool inNextSplit, Backend backend = Backend::Best);
+    static void switchDeclDef(const CursorInEditor &data,
+                              Utils::ProcessLinkCallback &&processLinkCallback,
+                              Backend backend = Backend::Best);
+    static void startLocalRenaming(const CursorInEditor &data, const ProjectPart *projectPart,
+                                   RenameCallback &&renameSymbolsCallback,
+                                   Backend backend = Backend::Best);
+    static void globalRename(const CursorInEditor &data, UsagesCallback &&renameCallback,
+                             const QString &replacement, Backend backend = Backend::Best);
+    static void findUsages(const CursorInEditor &data, UsagesCallback &&showUsagesCallback,
+                           Backend backend = Backend::Best);
+
     static Core::ILocatorFilter *createAuxiliaryCurrentDocumentFilter();
 
     std::unique_ptr<AbstractOverviewModel> createOverviewModel() const;
@@ -214,11 +213,6 @@ public:
     static QString configurationFileName();
     static QString editorConfigurationFileName();
 
-    static void addRefactoringEngine(RefactoringEngineType type,
-                                     RefactoringEngineInterface *refactoringEngine);
-    static void removeRefactoringEngine(RefactoringEngineType type);
-    static RefactoringEngineInterface *builtinRefactoringEngine();
-
     void setLocatorFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
     void setClassesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
     void setIncludesFilter(std::unique_ptr<Core::ILocatorFilter> &&filter);
@@ -292,6 +286,8 @@ private:
 
     WorkingCopy buildWorkingCopyList();
 
+    ModelManagerSupport *modelManagerSupport(Backend backend) const;
+
     void ensureUpdated();
     QStringList internalProjectFiles() const;
     ProjectExplorer::HeaderPaths internalHeaderPaths() const;
diff --git a/src/plugins/cppeditor/cppmodelmanagersupport.h b/src/plugins/cppeditor/cppmodelmanagersupport.h
index ca4f3f050d7..f5eec64fbaa 100644
--- a/src/plugins/cppeditor/cppmodelmanagersupport.h
+++ b/src/plugins/cppeditor/cppmodelmanagersupport.h
@@ -26,6 +26,8 @@
 #pragma once
 
 #include "cppeditor_global.h"
+#include "cursorineditor.h"
+#include "usages.h"
 
 #include <utils/link.h>
 
@@ -44,7 +46,7 @@ namespace CppEditor {
 class AbstractOverviewModel;
 class BaseEditorDocumentProcessor;
 class CppCompletionAssistProvider;
-class CursorInEditor;
+class ProjectPart;
 class RefactoringEngineInterface;
 
 class CPPEDITOR_EXPORT ModelManagerSupport
@@ -60,7 +62,6 @@ public:
     virtual TextEditor::BaseHoverHandler *createHoverHandler() = 0;
     virtual BaseEditorDocumentProcessor *createEditorDocumentProcessor(
                 TextEditor::TextDocument *baseTextDocument) = 0;
-    virtual RefactoringEngineInterface &refactoringEngineInterface() = 0;
     virtual std::unique_ptr<AbstractOverviewModel> createOverviewModel() = 0;
     virtual bool supportsOutline(const TextEditor::TextDocument *) const { return true; }
     virtual bool hasSpecialHoverHandler(const TextEditor::TextDocument *) const { return false; }
@@ -71,6 +72,14 @@ public:
                               bool resolveTarget, bool inNextSplit) = 0;
     virtual void switchDeclDef(const CursorInEditor &data,
                                Utils::ProcessLinkCallback &&processLinkCallback) = 0;
+    virtual void startLocalRenaming(const CursorInEditor &data,
+                                    const ProjectPart *projectPart,
+                                    RenameCallback &&renameSymbolsCallback) = 0;
+    virtual void globalRename(const CursorInEditor &data,
+                              UsagesCallback &&renameCallback,
+                              const QString &replacement) = 0;
+    virtual void findUsages(const CursorInEditor &data,
+                            UsagesCallback &&showUsagesCallback) const = 0;
 };
 
 class CPPEDITOR_EXPORT ModelManagerSupportProvider
diff --git a/src/plugins/cppeditor/cpprefactoringengine.cpp b/src/plugins/cppeditor/cpprefactoringengine.cpp
deleted file mode 100644
index 4a88f75d3a0..00000000000
--- a/src/plugins/cppeditor/cpprefactoringengine.cpp
+++ /dev/null
@@ -1,106 +0,0 @@
-/****************************************************************************
-**
-** 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.
-**
-****************************************************************************/
-
-#include "cpprefactoringengine.h"
-
-#include "cppcanonicalsymbol.h"
-#include "cppeditorwidget.h"
-#include "cppmodelmanager.h"
-#include "cppsemanticinfo.h"
-#include "cpptoolsreuse.h"
-#include "cppfollowsymbolundercursor.h"
-
-#include <clangsupport/sourcelocationscontainer.h>
-#include <texteditor/texteditor.h>
-
-#include <utils/qtcassert.h>
-
-namespace CppEditor::Internal {
-
-void CppRefactoringEngine::startLocalRenaming(const CursorInEditor &data,
-                                              const ProjectPart *,
-                                              RenameCallback &&renameSymbolsCallback)
-{
-    CppEditorWidget *editorWidget = data.editorWidget();
-    QTC_ASSERT(editorWidget, renameSymbolsCallback(QString(),
-                                                   ClangBackEnd::SourceLocationsContainer(),
-                                                   0); return;);
-    editorWidget->updateSemanticInfo();
-    // Call empty callback
-    renameSymbolsCallback(QString(),
-                          ClangBackEnd::SourceLocationsContainer(),
-                          data.cursor().document()->revision());
-}
-
-void CppRefactoringEngine::globalRename(const CursorInEditor &data,
-                                        UsagesCallback &&,
-                                        const QString &replacement)
-{
-    CppModelManager *modelManager = CppModelManager::instance();
-    if (!modelManager)
-        return;
-
-    CppEditorWidget *editorWidget = data.editorWidget();
-    QTC_ASSERT(editorWidget, return;);
-
-    SemanticInfo info = editorWidget->semanticInfo();
-    info.snapshot = modelManager->snapshot();
-    info.snapshot.insert(info.doc);
-    const QTextCursor &cursor = data.cursor();
-    if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
-        modelManager->renameMacroUsages(*macro, replacement);
-    } else {
-        Internal::CanonicalSymbol cs(info.doc, info.snapshot);
-        CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
-        if (canonicalSymbol)
-            modelManager->renameUsages(canonicalSymbol, cs.context(), replacement);
-    }
-}
-
-void CppRefactoringEngine::findUsages(const CursorInEditor &data,
-                                      UsagesCallback &&) const
-{
-    CppModelManager *modelManager = CppModelManager::instance();
-    if (!modelManager)
-        return;
-
-    CppEditorWidget *editorWidget = data.editorWidget();
-    QTC_ASSERT(editorWidget, return;);
-
-    SemanticInfo info = editorWidget->semanticInfo();
-    info.snapshot = modelManager->snapshot();
-    info.snapshot.insert(info.doc);
-    const QTextCursor &cursor = data.cursor();
-    if (const CPlusPlus::Macro *macro = findCanonicalMacro(cursor, info.doc)) {
-        modelManager->findMacroUsages(*macro);
-    } else {
-        Internal::CanonicalSymbol cs(info.doc, info.snapshot);
-        CPlusPlus::Symbol *canonicalSymbol = cs(cursor);
-        if (canonicalSymbol)
-            modelManager->findUsages(canonicalSymbol, cs.context());
-    }
-}
-
-} // namespace CppEditor::Internal
diff --git a/src/plugins/cppeditor/cpprefactoringengine.h b/src/plugins/cppeditor/cpprefactoringengine.h
deleted file mode 100644
index 765e8eece64..00000000000
--- a/src/plugins/cppeditor/cpprefactoringengine.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/****************************************************************************
-**
-** 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 "refactoringengineinterface.h"
-
-namespace CppEditor::Internal {
-
-class CppRefactoringEngine : public RefactoringEngineInterface
-{
-public:
-    void startLocalRenaming(const CursorInEditor &data,
-                            const ProjectPart *projectPart,
-                            RenameCallback &&renameSymbolsCallback) override;
-    void globalRename(const CursorInEditor &data, UsagesCallback &&,
-                      const QString &replacement) override;
-    void findUsages(const CursorInEditor &data, UsagesCallback &&) const override;
-};
-
-} // namespace CppEditor::Internal
diff --git a/src/plugins/cppeditor/cursorineditor.h b/src/plugins/cppeditor/cursorineditor.h
index 6bd2e83af2e..a6d8edb5872 100644
--- a/src/plugins/cppeditor/cursorineditor.h
+++ b/src/plugins/cppeditor/cursorineditor.h
@@ -29,11 +29,19 @@
 
 #include <QTextCursor>
 
+#include <functional>
+
+namespace ClangBackEnd { class SourceLocationsContainer; }
 namespace TextEditor { class TextDocument; }
 
 namespace CppEditor {
 class CppEditorWidget;
 
+// TODO: Move to a better place.
+using RenameCallback = std::function<void(const QString &,
+                                          const ClangBackEnd::SourceLocationsContainer &,
+                                          int)>;
+
 class CursorInEditor
 {
 public:
diff --git a/src/plugins/cppeditor/refactoringengineinterface.h b/src/plugins/cppeditor/refactoringengineinterface.h
deleted file mode 100644
index 55299aee26b..00000000000
--- a/src/plugins/cppeditor/refactoringengineinterface.h
+++ /dev/null
@@ -1,73 +0,0 @@
-/****************************************************************************
-**
-** 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 "cursorineditor.h"
-#include "usages.h"
-
-#include <utils/link.h>
-#include <utils/fileutils.h>
-
-#include <cplusplus/CppDocument.h>
-
-namespace ClangBackEnd { class SourceLocationsContainer; }
-namespace TextEditor { class TextEditorWidget; }
-
-namespace CppEditor {
-
-class ProjectPart;
-class SymbolFinder;
-
-enum class CallType
-{
-    Synchronous,
-    Asynchronous
-};
-
-// NOTE: This interface is not supposed to be owned as an interface pointer
-class CPPEDITOR_EXPORT RefactoringEngineInterface
-{
-public:
-    using RenameCallback = std::function<void(const QString &,
-                                              const ClangBackEnd::SourceLocationsContainer &,
-                                              int)>;
-    using Link = Utils::Link;
-
-    virtual ~RefactoringEngineInterface() = default;
-
-    virtual void startLocalRenaming(const CursorInEditor &data,
-                                    const ProjectPart *projectPart,
-                                    RenameCallback &&renameSymbolsCallback) = 0;
-    virtual void globalRename(const CursorInEditor &data,
-                              UsagesCallback &&renameCallback,
-                              const QString &replacement) = 0;
-    virtual void findUsages(const CursorInEditor &data,
-                            UsagesCallback &&showUsagesCallback) const = 0;
-    virtual bool isRefactoringEngineAvailable() const { return true; }
-};
-
-} // namespace CppEditor