Skeleton for property deferring

1 files changed, 91 insertions, 3 deletions

diff --git a/src/declarative/qml/qmldeclarativedata_p.h b/src/declarative/qml/qmldeclarativedata_p.h
index fb7a015..b8d3cf4 100644
--- a/src/declarative/qml/qmldeclarativedata_p.h
+++ b/src/declarative/qml/qmldeclarativedata_p.h
@@ -52,20 +52,108 @@ public:
     QmlSimpleDeclarativeData() : flags(0), context(0) {}
 
     virtual void destroyed(QObject *);
-    enum Flag { Extended = 0x00000001 };
+    enum Flag { Instance = 0x00000001, Extended = 0x00000002 };
     quint32 flags;
     QmlContext *context;
+
+    static inline QmlSimpleDeclarativeData *get(QObject *object, 
+                                                bool create = false);
 };
 
-class QmlExtendedDeclarativeData : public QmlSimpleDeclarativeData
+class QmlCompiledComponent;
+class QmlInstanceDeclarativeData : public QmlSimpleDeclarativeData
 {
 public:
-    QmlExtendedDeclarativeData() { flags = Extended; }
+    QmlInstanceDeclarativeData() { flags |= Instance; }
 
     virtual void destroyed(QObject *);
+
+    QmlCompiledComponent *deferredComponent;
+    unsigned int deferredIdx;
+
+    static inline QmlInstanceDeclarativeData *get(QObject *object, 
+                                                  bool create = false);
+};
+
+class QmlExtendedDeclarativeData : public QmlInstanceDeclarativeData
+{
+public:
+    QmlExtendedDeclarativeData() { flags |= Extended; }
+
     QHash<int, QObject *> attachedProperties;
+
+    static inline QmlExtendedDeclarativeData *get(QObject *object, 
+                                                  bool create = false);
 };
 
+QmlSimpleDeclarativeData *
+QmlSimpleDeclarativeData::get(QObject *object, bool create)
+{
+    QObjectPrivate *priv = QObjectPrivate::get(object);
+
+    if (create && !priv->declarativeData)
+        priv->declarativeData = new QmlInstanceDeclarativeData;
+
+    return static_cast<QmlSimpleDeclarativeData *>(priv->declarativeData);
+}
+
+QmlInstanceDeclarativeData *
+QmlInstanceDeclarativeData::get(QObject *object, bool create)
+{
+    QObjectPrivate *priv = QObjectPrivate::get(object);
+
+    QmlSimpleDeclarativeData *simple = 
+        static_cast<QmlSimpleDeclarativeData *>(priv->declarativeData);
+
+    if (simple && (simple->flags & Instance)) {
+        return static_cast<QmlInstanceDeclarativeData *>(simple);
+    } else if (create && simple) {
+        QmlInstanceDeclarativeData *rv = new QmlInstanceDeclarativeData;
+        rv->context = simple->context;
+        simple->destroyed(object);
+        priv->declarativeData = rv;
+        return rv;
+    } else if (create) {
+        QmlInstanceDeclarativeData *rv = new QmlInstanceDeclarativeData;
+        priv->declarativeData = rv;
+        return rv;
+    }
+    return 0;
+}
+
+QmlExtendedDeclarativeData *
+QmlExtendedDeclarativeData::get(QObject *object, bool create)
+{
+    QObjectPrivate *priv = QObjectPrivate::get(object);
+
+    QmlSimpleDeclarativeData *simple = 
+        static_cast<QmlSimpleDeclarativeData *>(priv->declarativeData);
+
+    if (simple && (simple->flags & Extended)) {
+        return static_cast<QmlExtendedDeclarativeData *>(simple);
+    } else if (create && simple) {
+        QmlExtendedDeclarativeData *rv = new QmlExtendedDeclarativeData;
+        rv->context = simple->context;
+
+        if (simple->flags & Instance) {
+            QmlInstanceDeclarativeData *instance = 
+                static_cast<QmlInstanceDeclarativeData *>(priv->declarativeData);
+            rv->deferredComponent = instance->deferredComponent;
+            rv->deferredIdx = instance->deferredIdx;
+            delete simple;
+        } else {
+            simple->destroyed(object);
+        }
+        priv->declarativeData = rv;
+        return rv;
+    } else if (create) {
+        QmlExtendedDeclarativeData *rv = new QmlExtendedDeclarativeData;
+        priv->declarativeData = rv;
+        return rv;
+    }
+    return 0;
+}
+
 QT_END_NAMESPACE
 
 #endif // QMLDECLARATIVEDATA_P_H