--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/bindings/js/ScriptState.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2008, Google Inc.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ScriptState_h
+#define ScriptState_h
+
+#include "JSDOMBinding.h"
+#include <runtime/Protect.h>
+#include <wtf/Noncopyable.h>
+
+namespace WebCore {
+class DOMWrapperWorld;
+class Frame;
+class Node;
+class Page;
+
+// The idea is to expose "state-like" methods (hadException, and any other
+// methods where ExecState just dips into globalData) of JSC::ExecState as a
+// separate abstraction.
+// For now, the separation is purely by convention.
+typedef JSC::ExecState ScriptState;
+
+class ScriptStateProtectedPtr : public Noncopyable {
+public:
+    ScriptStateProtectedPtr() { }
+    ScriptStateProtectedPtr(ScriptState* scriptState) : m_globalObject(scriptState->lexicalGlobalObject()) { }
+    ScriptState* get()
+    {
+        if (m_globalObject)
+            return m_globalObject->globalExec();
+        return 0;
+    }
+private:
+    JSC::ProtectedPtr<JSC::JSGlobalObject> m_globalObject;
+};
+
+ScriptState* mainWorldScriptState(Frame*);
+
+ScriptState* scriptStateFromNode(DOMWrapperWorld*, Node*);
+ScriptState* scriptStateFromPage(DOMWrapperWorld*, Page*);
+
+} // namespace WebCore
+
+#endif // ScriptState_h