Add QScriptDeclarativeClass

QScriptDeclarativeClass is a private, but exported, class used by the
declarativeui module.  It is very similar to QScriptClass, but slightly
faster and provides a couple of "backdoor" extension mechanisms used
by declarative.

Reviewed-by: Warwick Allison

3 files changed, 16 insertions, 3 deletions

diff --git a/src/script/api/qscriptengine.cpp b/src/script/api/qscriptengine.cpp
index f41b4e2..216f325 100644
--- a/src/script/api/qscriptengine.cpp
+++ b/src/script/api/qscriptengine.cpp
@@ -2299,7 +2299,8 @@ QScriptContext *QScriptEngine::pushContext()
    return the new top frame. (might be the same as exec if a new stackframe was not needed) or 0 if stack overflow
 */
 JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSValue _thisObject,
-                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor)
+                                                  const JSC::ArgList& args, JSC::JSObject *callee, bool calledAsConstructor,
+                                                  bool clearScopeChain)
 {
     JSC::JSValue thisObject = _thisObject;
     if (calledAsConstructor) {
@@ -2333,7 +2334,14 @@ JSC::CallFrame *QScriptEnginePrivate::pushContext(JSC::CallFrame *exec, JSC::JSV
         for (it = args.begin(); it != args.end(); ++it)
             newCallFrame[++dst] = *it;
         newCallFrame += argc + JSC::RegisterFile::CallFrameHeaderSize;
-        newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+
+        if (!clearScopeChain) {
+            newCallFrame->init(0, /*vPC=*/0, exec->scopeChain(), exec, flags | ShouldRestoreCallFrame, argc, callee);
+        } else {
+            JSC::JSObject *jscObject = originalGlobalObject();
+            JSC::ScopeChainNode *scn = new JSC::ScopeChainNode(0, jscObject, &exec->globalData(), jscObject);
+            newCallFrame->init(0, /*vPC=*/0, scn, exec, flags | ShouldRestoreCallFrame, argc, callee);
+        }
     } else {
         setContextFlags(newCallFrame, flags);
 #if ENABLE(JIT)
diff --git a/src/script/api/qscriptengine_p.h b/src/script/api/qscriptengine_p.h
index d12b0f4..e7cdcda 100644
--- a/src/script/api/qscriptengine_p.h
+++ b/src/script/api/qscriptengine_p.h
@@ -174,7 +174,7 @@ public:
     static JSC::Register *thisRegisterForFrame(JSC::ExecState *frame);
 
     JSC::CallFrame *pushContext(JSC::CallFrame *exec, JSC::JSValue thisObject, const JSC::ArgList& args,
-                                JSC::JSObject *callee, bool calledAsConstructor = false);
+                                JSC::JSObject *callee, bool calledAsConstructor = false, bool clearScopeChain = false);
     void popContext();
 
     void mark(JSC::MarkStack& markStack);
diff --git a/src/script/api/qscriptvalue.cpp b/src/script/api/qscriptvalue.cpp
index 52a1e6d..d6cbb41 100644
--- a/src/script/api/qscriptvalue.cpp
+++ b/src/script/api/qscriptvalue.cpp
@@ -71,6 +71,7 @@
 #include "bridge/qscriptclassobject_p.h"
 #include "bridge/qscriptvariant_p.h"
 #include "bridge/qscriptqobject_p.h"
+#include "bridge/qscriptdeclarativeclass_p.h"
 
 /*!
   \since 4.3
@@ -1496,6 +1497,8 @@ QVariant QScriptValue::toVariant() const
 #endif
             else if (isArray())
                 return QScriptEnginePrivate::variantListFromArray(*this);
+            else if (QScriptDeclarativeClass *dc = QScriptDeclarativeClass::scriptClass(*this))
+                return dc->toVariant(QScriptDeclarativeClass::object(*this));
             // try to convert to primitive
             JSC::ExecState *exec = d->engine->currentFrame;
             JSC::JSValue savedException;
@@ -1586,6 +1589,8 @@ QObject *QScriptValue::toQObject() const
     if (isQObject()) {
         QScriptObject *object = static_cast<QScriptObject*>(JSC::asObject(d->jscValue));
         return static_cast<QScript::QObjectDelegate*>(object->delegate())->value();
+    } else if (QScriptDeclarativeClass *dc = QScriptDeclarativeClass::scriptClass(*this)) {
+        return dc->toQObject(QScriptDeclarativeClass::object(*this));
     } else if (isVariant()) {
         QVariant var = toVariant();
         int type = var.userType();