Clang: Fix built-in's ExtractFunction action

Since

  Clang: Provide highlighting for identifier under cursor
  commit ca72c29462d9caae5e6095f8361f843758c5972c

the LocalUseMap, used for some refactoring actions, was not updated
anymore. Fall back to the built-in implementation for the LocalUseMap
because it contains pointers to built-in AST that clang obviously can't
provide.

Task-number: QTCREATORBUG-18607
Change-Id: I08762fe457835d4d83aca719febcb3497ee9696b
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>
Reviewed-by: Robert Loehning <robert.loehning@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

3 files changed, 32 insertions, 14 deletions

diff --git a/src/plugins/clangcodemodel/clangbackendipcintegration.cpp b/src/plugins/clangcodemodel/clangbackendipcintegration.cpp
index cfb52f1528..bb4d4c3010 100644
--- a/src/plugins/clangcodemodel/clangbackendipcintegration.cpp
+++ b/src/plugins/clangcodemodel/clangbackendipcintegration.cpp
@@ -129,8 +129,10 @@ void IpcReceiver::deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *t
     }
 }
 
-QFuture<CppTools::CursorInfo> IpcReceiver::addExpectedReferencesMessage(quint64 ticket,
-                                                                        QTextDocument *textDocument)
+QFuture<CppTools::CursorInfo> IpcReceiver::addExpectedReferencesMessage(
+        quint64 ticket,
+        QTextDocument *textDocument,
+        const CppTools::SemanticInfo::LocalUseMap &localUses)
 {
     QTC_CHECK(textDocument);
     QTC_CHECK(!m_referencesTable.contains(ticket));
@@ -138,7 +140,7 @@ QFuture<CppTools::CursorInfo> IpcReceiver::addExpectedReferencesMessage(quint64
     QFutureInterface<CppTools::CursorInfo> futureInterface;
     futureInterface.reportStarted();
 
-    const ReferencesEntry entry{futureInterface, textDocument};
+    const ReferencesEntry entry{futureInterface, textDocument, localUses};
     m_referencesTable.insert(ticket, entry);
 
     return futureInterface.future();
@@ -229,6 +231,7 @@ CppTools::CursorInfo::Range toCursorInfoRange(const QTextDocument &textDocument,
 
 static
 CppTools::CursorInfo toCursorInfo(const QTextDocument &textDocument,
+                                  const CppTools::SemanticInfo::LocalUseMap &localUses,
                                   const ReferencesMessage &message)
 {
     CppTools::CursorInfo result;
@@ -239,6 +242,7 @@ CppTools::CursorInfo toCursorInfo(const QTextDocument &textDocument,
         result.useRanges.append(toCursorInfoRange(textDocument, reference));
 
     result.useRanges.reserve(references.size());
+    result.localUses = localUses;
 
     return result;
 }
@@ -257,7 +261,7 @@ void IpcReceiver::references(const ReferencesMessage &message)
         return; // Editor document closed or a new request was issued making this result outdated.
 
     QTC_ASSERT(entry.textDocument, return);
-    futureInterface.reportResult(toCursorInfo(*entry.textDocument, message));
+    futureInterface.reportResult(toCursorInfo(*entry.textDocument, entry.localUses, message));
     futureInterface.reportFinished();
 }
 
@@ -672,12 +676,14 @@ QFuture<CppTools::CursorInfo> IpcCommunicator::requestReferences(
         const FileContainer &fileContainer,
         quint32 line,
         quint32 column,
-        QTextDocument *textDocument)
+        QTextDocument *textDocument,
+        const CppTools::SemanticInfo::LocalUseMap &localUses)
 {
     const RequestReferencesMessage message(fileContainer, line, column);
     m_ipcSender->requestReferences(message);
 
-    return m_ipcReceiver.addExpectedReferencesMessage(message.ticketNumber(), textDocument);
+    return m_ipcReceiver.addExpectedReferencesMessage(message.ticketNumber(), textDocument,
+                                                      localUses);
 }
 
 void IpcCommunicator::updateTranslationUnitWithRevisionCheck(Core::IDocument *document)
diff --git a/src/plugins/clangcodemodel/clangbackendipcintegration.h b/src/plugins/clangcodemodel/clangbackendipcintegration.h
index e98565f48c..842d68f266 100644
--- a/src/plugins/clangcodemodel/clangbackendipcintegration.h
+++ b/src/plugins/clangcodemodel/clangbackendipcintegration.h
@@ -75,8 +75,10 @@ public:
     void addExpectedCodeCompletedMessage(quint64 ticket, ClangCompletionAssistProcessor *processor);
     void deleteProcessorsOfEditorWidget(TextEditor::TextEditorWidget *textEditorWidget);
 
-    QFuture<CppTools::CursorInfo> addExpectedReferencesMessage(quint64 ticket,
-                                                               QTextDocument *textDocument);
+    QFuture<CppTools::CursorInfo>
+    addExpectedReferencesMessage(quint64 ticket,
+                                 QTextDocument *textDocument,
+                                 const CppTools::SemanticInfo::LocalUseMap &localUses);
     bool isExpectingCodeCompletedMessage() const;
 
     void reset();
@@ -99,11 +101,14 @@ private:
     struct ReferencesEntry {
         ReferencesEntry() = default;
         ReferencesEntry(QFutureInterface<CppTools::CursorInfo> futureInterface,
-                        QTextDocument *textDocument)
+                        QTextDocument *textDocument,
+                        const CppTools::SemanticInfo::LocalUseMap &localUses)
             : futureInterface(futureInterface)
-            , textDocument(textDocument) {}
+            , textDocument(textDocument)
+            , localUses(localUses) {}
         QFutureInterface<CppTools::CursorInfo> futureInterface;
         QPointer<QTextDocument> textDocument;
+        CppTools::SemanticInfo::LocalUseMap localUses;
     };
     QHash<quint64, ReferencesEntry> m_referencesTable;
 };
@@ -149,9 +154,12 @@ public:
     void registerUnsavedFilesForEditor(const FileContainers &fileContainers);
     void unregisterUnsavedFilesForEditor(const FileContainers &fileContainers);
     void requestDocumentAnnotations(const ClangBackEnd::FileContainer &fileContainer);
-    QFuture<CppTools::CursorInfo> requestReferences(const FileContainer &fileContainer,
-                                                    quint32 line,
-                                                    quint32 column, QTextDocument *textDocument);
+    QFuture<CppTools::CursorInfo> requestReferences(
+            const FileContainer &fileContainer,
+            quint32 line,
+            quint32 column,
+            QTextDocument *textDocument,
+            const CppTools::SemanticInfo::LocalUseMap &localUses);
     void completeCode(ClangCompletionAssistProcessor *assistProcessor, const QString &filePath,
                       quint32 line,
                       quint32 column,
diff --git a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
index e29f72ae9e..943c126c59 100644
--- a/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
+++ b/src/plugins/clangcodemodel/clangeditordocumentprocessor.cpp
@@ -36,6 +36,7 @@
 #include <diagnosticcontainer.h>
 #include <sourcelocationcontainer.h>
 
+#include <cpptools/builtincursorinfo.h>
 #include <cpptools/clangdiagnosticconfigsmodel.h>
 #include <cpptools/clangdiagnosticconfigsmodel.h>
 #include <cpptools/compileroptionsbuilder.h>
@@ -334,11 +335,14 @@ ClangEditorDocumentProcessor::cursorInfo(const CppTools::CursorInfoParams &param
 
     const QTextBlock block = params.textCursor.document()->findBlockByNumber(line - 1);
     column += ClangCodeModel::Utils::extraUtf8CharsShift(block.text(), column);
+    const CppTools::SemanticInfo::LocalUseMap localUses
+        = CppTools::BuiltinCursorInfo::findLocalUses(params.semanticInfo.doc, line, column);
 
     return m_ipcCommunicator.requestReferences(simpleFileContainer(),
                                                static_cast<quint32>(line),
                                                static_cast<quint32>(column),
-                                               textDocument());
+                                               textDocument(),
+                                               localUses);
 }
 
 ClangBackEnd::FileContainer ClangEditorDocumentProcessor::fileContainerWithArguments() const