Inline retrieval of QML contexts

In the good case this is just reading a few members of the relevant
classes. No need to call functions for this.

Change-Id: I9908cd6437cf9a1ca840f9aa0e524d3976272d67
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 19 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4engine_p.h b/src/qml/jsruntime/qv4engine_p.h
index 1ec5eb126a..ac095d2812 100644
--- a/src/qml/jsruntime/qv4engine_p.h
+++ b/src/qml/jsruntime/qv4engine_p.h
@@ -626,6 +626,25 @@ public:
     Heap::Object *newMapIteratorObject(Object *o);
     Heap::Object *newArrayIteratorObject(Object *o);
 
+    static Heap::ExecutionContext *qmlContext(Heap::ExecutionContext *ctx)
+    {
+        Heap::ExecutionContext *outer = ctx->outer;
+
+        if (ctx->type != Heap::ExecutionContext::Type_QmlContext && !outer)
+            return nullptr;
+
+        while (outer && outer->type != Heap::ExecutionContext::Type_GlobalContext) {
+            ctx = outer;
+            outer = ctx->outer;
+        }
+
+        Q_ASSERT(ctx);
+        if (ctx->type != Heap::ExecutionContext::Type_QmlContext)
+            return nullptr;
+
+        return ctx;
+    }
+
     Heap::QmlContext *qmlContext() const;
     QObject *qmlScopeObject() const;
     QQmlRefPointer<QQmlContextData> callingQmlContext() const;