Support aliasing of composite types.

Composite types haven't been registered with the metatype system, so we
use the base type as the property type instead.

6 files changed, 74 insertions, 0 deletions

diff --git a/src/declarative/qml/qmlcompiler.cpp b/src/declarative/qml/qmlcompiler.cpp
index bd46bbe..9147c4a 100644
--- a/src/declarative/qml/qmlcompiler.cpp
+++ b/src/declarative/qml/qmlcompiler.cpp
@@ -2440,6 +2440,21 @@ bool QmlCompiler::compileAlias(QMetaObjectBuilder &builder,
             typeName = aliasProperty.typeName();
     } else {
         typeName = idObject->metaObject()->className();
+
+        //use the base type since it has been registered with metatype system
+        int index = typeName.indexOf("_QML_");
+        if (index != -1) {
+            typeName = typeName.left(index);
+        } else {
+            index = typeName.indexOf("_QMLTYPE_");
+            const QMetaObject *mo = idObject->metaObject();
+            while (index != -1 && mo) {
+                typeName = mo->superClass()->className();
+                index = typeName.indexOf("_QMLTYPE_");
+                mo = mo->superClass();
+            }
+        }
+
         typeName += '*';
     }
 
diff --git a/tests/auto/declarative/qmllanguage/data/Alias3.qml b/tests/auto/declarative/qmllanguage/data/Alias3.qml
new file mode 100644
index 0000000..d1e78f8
--- /dev/null
+++ b/tests/auto/declarative/qmllanguage/data/Alias3.qml
@@ -0,0 +1,12 @@
+import Test 1.0
+import Qt 4.6
+
+QtObject {
+    property alias obj : otherObj
+    property var child
+    child: QtObject {
+        id: otherObj
+        property int myValue: 10
+    }
+}
+
diff --git a/tests/auto/declarative/qmllanguage/data/Alias4.qml b/tests/auto/declarative/qmllanguage/data/Alias4.qml
new file mode 100644
index 0000000..573674c
--- /dev/null
+++ b/tests/auto/declarative/qmllanguage/data/Alias4.qml
@@ -0,0 +1,5 @@
+import Test 1.0
+import Qt 4.6
+
+Alias3 {}
+
diff --git a/tests/auto/declarative/qmllanguage/data/alias.8.qml b/tests/auto/declarative/qmllanguage/data/alias.8.qml
new file mode 100644
index 0000000..38dc10f
--- /dev/null
+++ b/tests/auto/declarative/qmllanguage/data/alias.8.qml
@@ -0,0 +1,9 @@
+import Qt 4.6
+
+QtObject {
+   property var other
+   other: Alias3 { id: MyAliasObject }
+
+   property int value: MyAliasObject.obj.myValue
+}
+
diff --git a/tests/auto/declarative/qmllanguage/data/alias.9.qml b/tests/auto/declarative/qmllanguage/data/alias.9.qml
new file mode 100644
index 0000000..8061f99
--- /dev/null
+++ b/tests/auto/declarative/qmllanguage/data/alias.9.qml
@@ -0,0 +1,9 @@
+import Qt 4.6
+
+QtObject {
+   property var other
+   other: Alias4 { id: MyAliasObject }
+
+   property int value: MyAliasObject.obj.myValue
+}
+
diff --git a/tests/auto/declarative/qmllanguage/tst_qmllanguage.cpp b/tests/auto/declarative/qmllanguage/tst_qmllanguage.cpp
index 160998f..56c500c 100644
--- a/tests/auto/declarative/qmllanguage/tst_qmllanguage.cpp
+++ b/tests/auto/declarative/qmllanguage/tst_qmllanguage.cpp
@@ -889,6 +889,30 @@ void tst_qmllanguage::aliasProperties()
                               object->metaObject()->indexOfProperty("aliasedObject"), a);
         QVERIFY(alias2 == 0);
     }
+
+    // Simple composite type
+    {
+        QmlComponent component(&engine, TEST_FILE("alias.8.qml"));
+        VERIFY_ERRORS(0);
+        QObject *object = component.create();
+        QVERIFY(object != 0);
+
+        QCOMPARE(object->property("value").toInt(), 10);
+
+        delete object;
+    }
+
+    // Complex composite type
+    {
+        QmlComponent component(&engine, TEST_FILE("alias.9.qml"));
+        VERIFY_ERRORS(0);
+        QObject *object = component.create();
+        QVERIFY(object != 0);
+
+        QCOMPARE(object->property("value").toInt(), 10);
+
+        delete object;
+    }
 }
 
 // Test that the root element in a composite type can be a Component