QmlDesigner: Fix for broken prototypes in templates

This is just a band-aid fix.
plugins.qmltypes can contain "duplicated" cpp type declarations, some
without export, similar to a forward declaration. This is the case for
QQuickItem in templates for example.
The prototype for QQuickItem in this case is not assoicated with
QtQuick.Item, which we expect.

Task-number: QTCREATORBUG-24283
Change-Id: I3377760e29f1af5c8e948aaa1ae7883448116872
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

1 files changed, 15 insertions, 1 deletions

diff --git a/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp b/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
index 0efa621e68a..902072f1297 100644
--- a/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
+++ b/src/plugins/qmldesigner/designercore/metainfo/nodemetainfo.cpp
@@ -1263,7 +1263,21 @@ void NodeMetaInfoPrivate::setupPrototypes()
         description.className = ov->className();
         description.minorVersion = -1;
         description.majorVersion = -1;
-        if (const CppComponentValue * qmlValue = value_cast<CppComponentValue>(ov)) {
+        if (description.className == "QQuickItem") {
+            /* Ugly hack to recover from wrong prototypes for Item */
+            if (const CppComponentValue *qmlValue = value_cast<CppComponentValue>(
+                    context()->lookupType(document(), {"Item"}))) {
+                description.className = "QtQuick.Item";
+                description.minorVersion = qmlValue->componentVersion().minorVersion();
+                description.majorVersion = qmlValue->componentVersion().majorVersion();
+                m_prototypes.append(description);
+            } else {
+                qWarning() << Q_FUNC_INFO << "Lookup for Item failed";
+            }
+            continue;
+        }
+
+        if (const CppComponentValue *qmlValue = value_cast<CppComponentValue>(ov)) {
             description.minorVersion = qmlValue->componentVersion().minorVersion();
             description.majorVersion = qmlValue->componentVersion().majorVersion();
             LanguageUtils::FakeMetaObject::Export qtquickExport = qmlValue->metaObject()->exportInPackage(QLatin1String("QtQuick"));