New code assist API

This is a re-work of our completion engine. Primary goals are:

- Allow the computation to run in a separate thread so the GUI is not locked.
- Support a model-based approach. QStrings are still needed (filtering, etc), but
internal structures are free to use more efficient representations.
- Unifiy all kinds of *assist* into a more reusable and extensible framework.
- Remove unnecessary dependencies on the text editor so we have more generic
and easily "plugable" components (still things to be resolved).

src/plugins/qmljseditor/qmljsquickfix.h

@@ -40,6 +40,8 @@
 #include <qmljs/qmljsdocument.h>
 #include <qmljstools/qmljsrefactoringchanges.h>
 
+#include <QtCore/QSharedPointer>
+
 namespace ExtensionSystem {
 class IPlugin;
 }
@@ -51,40 +53,12 @@ namespace QmlJS {
 namespace QmlJSEditor {
 
 namespace Internal {
-class QmlJSQuickFixCollector;
+class QmlJSQuickFixAssistInterface;
 } // namespace Internal
 
-/*!
-    Specialized QuickFixState for QML/JavaScript quick-fixes.
-
-    This specialized state for QML/JavaScript quick-fixes also holds the
-    QmlJSEditor::Internal::SemanticInfo for the document in the editor.
- */
-class QmlJSQuickFixState: public TextEditor::QuickFixState
-{
-    friend class Internal::QmlJSQuickFixCollector;
-
-public:
-    /// Creates a new state for the given editor.
-    QmlJSQuickFixState(TextEditor::BaseTextEditorWidget *editor);
-
-    SemanticInfo semanticInfo() const;
-
-    /// \returns the snapshot holding the document of the editor.
-    QmlJS::Snapshot snapshot() const;
-
-    /// \returns the document of the editor
-    QmlJS::Document::Ptr document() const;
-
-    const QmlJSTools::QmlJSRefactoringFile currentFile() const;
-
-private:
-    SemanticInfo _semanticInfo;
-};
 
 /*!
-    A quick-fix operation for the QML/JavaScript editor, which works on a
-    QmlJSQuickFixState .
+    A quick-fix operation for the QML/JavaScript editor.
  */
 class QmlJSQuickFixOperation: public TextEditor::QuickFixOperation
 {
@@ -94,13 +68,12 @@ public:
     /*!
         Creates a new QmlJSQuickFixOperation.
 
-        This operation will copy the complete state, in order to be able to perform
-        its changes later on.
-
-        \param state The state for which this operation was created.
+        \param interface The interface on which the operation is performed.
         \param priority The priority for this operation.
      */
-    explicit QmlJSQuickFixOperation(const QmlJSQuickFixState &state, int priority = -1);
+    explicit QmlJSQuickFixOperation(
+        const QSharedPointer<const Internal::QmlJSQuickFixAssistInterface> &interface,
+        int priority = -1);
     virtual ~QmlJSQuickFixOperation();
 
     virtual void perform();
@@ -111,14 +84,13 @@ protected:
     virtual void performChanges(QmlJSTools::QmlJSRefactoringFile *currentFile,
                                 QmlJSTools::QmlJSRefactoringChanges *refactoring) = 0;
 
-    /// \returns A const-reference to the state of the operation.
-    const QmlJSQuickFixState &state() const;
+    const Internal::QmlJSQuickFixAssistInterface *assistInterface() const;
 
     /// \returns The name of the file for for which this operation is invoked.
     QString fileName() const;
 
 private:
-    QmlJSQuickFixState _state;
+    QSharedPointer<const Internal::QmlJSQuickFixAssistInterface> m_interface;
 };
 
 class QmlJSQuickFixFactory: public TextEditor::QuickFixFactory
@@ -129,39 +101,20 @@ public:
     QmlJSQuickFixFactory();
     virtual ~QmlJSQuickFixFactory();
 
-    virtual QList<TextEditor::QuickFixOperation::Ptr> matchingOperations(TextEditor::QuickFixState *state);
+    virtual QList<TextEditor::QuickFixOperation::Ptr>
+        matchingOperations(const QSharedPointer<const TextEditor::IAssistInterface> &interface);
 
     /*!
         Implement this method to match and create the appropriate
         QmlJSQuickFixOperation objects.
      */
-    virtual QList<QmlJSQuickFixOperation::Ptr> match(const QmlJSQuickFixState &state) = 0;
+    virtual QList<QmlJSQuickFixOperation::Ptr> match(
+        const QSharedPointer<const Internal::QmlJSQuickFixAssistInterface> &interface) = 0;
 
     static QList<QmlJSQuickFixOperation::Ptr> noResult();
     static QList<QmlJSQuickFixOperation::Ptr> singleResult(QmlJSQuickFixOperation *operation);
 };
 
-namespace Internal {
-
-class QmlJSQuickFixCollector: public TextEditor::QuickFixCollector
-{
-    Q_OBJECT
-
-public:
-    QmlJSQuickFixCollector();
-    virtual ~QmlJSQuickFixCollector();
-
-    virtual bool supportsEditor(TextEditor::ITextEditor *editor) const;
-    virtual bool supportsPolicy(TextEditor::CompletionPolicy policy) const;
-    virtual TextEditor::QuickFixState *initializeCompletion(TextEditor::BaseTextEditorWidget *editor);
-
-    virtual QList<TextEditor::QuickFixFactory *> quickFixFactories() const;
-
-    /// Registers all quick-fixes in this plug-in as auto-released objects.
-    static void registerQuickFixes(ExtensionSystem::IPlugin *plugIn);
-};
-
-} // namespace Internal
 } // namespace QmlJSEditor
 
 #endif // QMLJSQUICKFIX_H