Refactoring changes: Cleanup and improvements.

Previously RefactoringFiles were usually passed around by value.
However, since a RefactoringFile may sometimes own a QTextDocument
(when it was read from a file), that's not great and caused the
file to be reread after every copy.

With this change RefactoringFile becomes noncopyable and is always
owned by a shared pointer.

This change also allowed having const RefactoringFiles which is
useful because they can be safely used from other threads. See
CppRefactoringChanges::fileNoEditor.

Change-Id: I9045921d6d0f6349f9558ff2a3d8317ea172193b
Reviewed-on: http://codereview.qt.nokia.com/3084
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>

7 files changed, 27 insertions, 21 deletions

diff --git a/src/plugins/qmljseditor/qmljscomponentfromobjectdef.cpp b/src/plugins/qmljseditor/qmljscomponentfromobjectdef.cpp
index bf78bed93d..f8baece7e8 100644
--- a/src/plugins/qmljseditor/qmljscomponentfromobjectdef.cpp
+++ b/src/plugins/qmljseditor/qmljscomponentfromobjectdef.cpp
@@ -114,7 +114,8 @@ public:
         }
     }
 
-    virtual void performChanges(QmlJSRefactoringFile *currentFile, QmlJSRefactoringChanges *refactoring)
+    virtual void performChanges(QmlJSRefactoringFilePtr currentFile,
+                                const QmlJSRefactoringChanges &refactoring)
     {
         QString componentName = m_componentName;
         QString path = QFileInfo(fileName()).path();
@@ -142,7 +143,7 @@ public:
                 + QLatin1String("}\n");
 
         // stop if we can't create the new file
-        if (!refactoring->createFile(newFileName, txt))
+        if (!refactoring.createFile(newFileName, txt))
             return;
 
         QString replacement = componentName + QLatin1String(" {\n");
@@ -152,8 +153,9 @@ public:
 
         Utils::ChangeSet changes;
         changes.replace(start, end, replacement);
-        currentFile->change(changes);
-        currentFile->indent(Range(start, end + 1));
+        currentFile->setChangeSet(changes);
+        currentFile->appendIndentRange(Range(start, end + 1));
+        currentFile->apply();
     }
 };
 
@@ -163,13 +165,13 @@ public:
 QList<QmlJSQuickFixOperation::Ptr> ComponentFromObjectDef::match(
     const QSharedPointer<const QmlJSQuickFixAssistInterface> &interface)
 {
-    const int pos = interface->currentFile().cursor().position();
+    const int pos = interface->currentFile()->cursor().position();
 
     QList<Node *> path = interface->semanticInfo().rangePath(pos);
     for (int i = path.size() - 1; i >= 0; --i) {
         Node *node = path.at(i);
         if (UiObjectDefinition *objDef = cast<UiObjectDefinition *>(node)) {
-            if (!interface->currentFile().isCursorOn(objDef->qualifiedTypeNameId))
+            if (!interface->currentFile()->isCursorOn(objDef->qualifiedTypeNameId))
                 return noResult();
              // check that the node is not the root node
             if (i > 0 && !cast<UiProgram*>(path.at(i - 1))) {
diff --git a/src/plugins/qmljseditor/qmljsquickfix.cpp b/src/plugins/qmljseditor/qmljsquickfix.cpp
index f00a0eddd1..186442dcd0 100644
--- a/src/plugins/qmljseditor/qmljsquickfix.cpp
+++ b/src/plugins/qmljseditor/qmljsquickfix.cpp
@@ -66,11 +66,10 @@ QmlJSQuickFixOperation::~QmlJSQuickFixOperation()
 void QmlJSQuickFixOperation::perform()
 {
     QmlJSRefactoringChanges refactoring(ExtensionSystem::PluginManager::instance()->getObject<QmlJS::ModelManagerInterface>(),
-                                    //_state.snapshot());
                                         m_interface->semanticInfo().snapshot);
-    QmlJSRefactoringFile current = refactoring.file(fileName());
+    QmlJSRefactoringFilePtr current = refactoring.file(fileName());
 
-    performChanges(&current, &refactoring);
+    performChanges(current, refactoring);
 }
 
 const QmlJSQuickFixAssistInterface *QmlJSQuickFixOperation::assistInterface() const
diff --git a/src/plugins/qmljseditor/qmljsquickfix.h b/src/plugins/qmljseditor/qmljsquickfix.h
index 99b8b60737..7cdbb79eab 100644
--- a/src/plugins/qmljseditor/qmljsquickfix.h
+++ b/src/plugins/qmljseditor/qmljsquickfix.h
@@ -79,8 +79,8 @@ public:
 protected:
     typedef Utils::ChangeSet::Range Range;
 
-    virtual void performChanges(QmlJSTools::QmlJSRefactoringFile *currentFile,
-                                QmlJSTools::QmlJSRefactoringChanges *refactoring) = 0;
+    virtual void performChanges(QmlJSTools::QmlJSRefactoringFilePtr currentFile,
+                                const QmlJSTools::QmlJSRefactoringChanges &refactoring) = 0;
 
     const Internal::QmlJSQuickFixAssistInterface *assistInterface() const;
 
diff --git a/src/plugins/qmljseditor/qmljsquickfixassist.cpp b/src/plugins/qmljseditor/qmljsquickfixassist.cpp
index 99a60eaa68..0d30dae873 100644
--- a/src/plugins/qmljseditor/qmljsquickfixassist.cpp
+++ b/src/plugins/qmljseditor/qmljsquickfixassist.cpp
@@ -51,6 +51,7 @@ QmlJSQuickFixAssistInterface::QmlJSQuickFixAssistInterface(QmlJSTextEditorWidget
     : DefaultAssistInterface(editor->document(), editor->position(), editor->file(), reason)
     , m_editor(editor)
     , m_semanticInfo(editor->semanticInfo())
+    , m_currentFile(QmlJSRefactoringChanges::file(m_editor, m_semanticInfo.document))
 {}
 
 QmlJSQuickFixAssistInterface::~QmlJSQuickFixAssistInterface()
@@ -61,9 +62,9 @@ const SemanticInfo &QmlJSQuickFixAssistInterface::semanticInfo() const
     return m_semanticInfo;
 }
 
-const QmlJSTools::QmlJSRefactoringFile QmlJSQuickFixAssistInterface::currentFile() const
+QmlJSRefactoringFilePtr QmlJSQuickFixAssistInterface::currentFile() const
 {
-    return QmlJSRefactoringFile(m_editor, m_semanticInfo.document);
+    return m_currentFile;
 }
 
 QWidget *QmlJSQuickFixAssistInterface::widget() const
diff --git a/src/plugins/qmljseditor/qmljsquickfixassist.h b/src/plugins/qmljseditor/qmljsquickfixassist.h
index 3427cb1b41..50d2ec00e5 100644
--- a/src/plugins/qmljseditor/qmljsquickfixassist.h
+++ b/src/plugins/qmljseditor/qmljsquickfixassist.h
@@ -51,12 +51,13 @@ public:
     virtual ~QmlJSQuickFixAssistInterface();
 
     const SemanticInfo &semanticInfo() const;
-    const QmlJSTools::QmlJSRefactoringFile currentFile() const;
+    QmlJSTools::QmlJSRefactoringFilePtr currentFile() const;
     QWidget *widget() const;
 
 private:
     QmlJSTextEditorWidget *m_editor;
     SemanticInfo m_semanticInfo;
+    QmlJSTools::QmlJSRefactoringFilePtr m_currentFile;
 };
 
 
diff --git a/src/plugins/qmljseditor/qmljsquickfixes.cpp b/src/plugins/qmljseditor/qmljsquickfixes.cpp
index 84fd0de6fe..394e8c1d1c 100644
--- a/src/plugins/qmljseditor/qmljsquickfixes.cpp
+++ b/src/plugins/qmljseditor/qmljsquickfixes.cpp
@@ -70,7 +70,7 @@ public:
     {
         UiObjectInitializer *objectInitializer = 0;
 
-        const int pos = interface->currentFile().cursor().position();
+        const int pos = interface->currentFile()->cursor().position();
 
         if (QmlJS::AST::Node *member = interface->semanticInfo().rangeAt(pos)) {
             if (QmlJS::AST::UiObjectBinding *b = QmlJS::AST::cast<QmlJS::AST::UiObjectBinding *>(member)) {
@@ -104,7 +104,8 @@ private:
                                                    "Split initializer"));
         }
 
-        virtual void performChanges(QmlJSRefactoringFile *currentFile, QmlJSRefactoringChanges *)
+        virtual void performChanges(QmlJSRefactoringFilePtr currentFile,
+                                    const QmlJSRefactoringChanges &)
         {
             Q_ASSERT(_objectInitializer != 0);
 
@@ -123,9 +124,10 @@ private:
             changes.insert(currentFile->startOf(_objectInitializer->rbraceToken),
                            QLatin1String("\n"));
 
-            currentFile->change(changes);
-            currentFile->indent(Range(currentFile->startOf(_objectInitializer->lbraceToken),
+            currentFile->setChangeSet(changes);
+            currentFile->appendIndentRange(Range(currentFile->startOf(_objectInitializer->lbraceToken),
                                       currentFile->startOf(_objectInitializer->rbraceToken)));
+            currentFile->apply();
         }
     };
 };
diff --git a/src/plugins/qmljseditor/qmloutlinemodel.cpp b/src/plugins/qmljseditor/qmloutlinemodel.cpp
index 63569ec622..cd19095c7a 100644
--- a/src/plugins/qmljseditor/qmloutlinemodel.cpp
+++ b/src/plugins/qmljseditor/qmloutlinemodel.cpp
@@ -775,11 +775,12 @@ void QmlOutlineModel::reparentNodes(QmlOutlineItem *targetItem, int row, QList<Q
     }
 
     QmlJSRefactoringChanges refactoring(ModelManagerInterface::instance(), m_semanticInfo.snapshot);
-    TextEditor::RefactoringFile file = refactoring.file(m_semanticInfo.document->fileName());
-    file.change(changeSet);
+    TextEditor::RefactoringFilePtr file = refactoring.file(m_semanticInfo.document->fileName());
+    file->setChangeSet(changeSet);
     foreach (const Utils::ChangeSet::Range &range, changedRanges) {
-        file.indent(range);
+        file->appendIndentRange(range);
     }
+    file->apply();
 }
 
 void QmlOutlineModel::moveObjectMember(AST::UiObjectMember *toMove,