webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 78 insertions, 0 deletions

diff --git a/Source/WebCore/bindings/js/JSEventTargetCustom.h b/Source/WebCore/bindings/js/JSEventTargetCustom.h
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+++ b/Source/WebCore/bindings/js/JSEventTargetCustom.h
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+/*
+ * Copyright (C) 2016 Apple 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:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+ */
+
+#pragma once
+
+#include "DOMWindow.h"
+#include "JSDOMBinding.h"
+#include "JSDOMBindingCaller.h"
+#include "JSDOMBindingSecurity.h"
+
+namespace WebCore {
+
+// Wrapper type for JSEventTarget's castedThis because JSDOMWindow and JSWorkerGlobalScope do not inherit JSEventTarget.
+class JSEventTargetWrapper {
+    WTF_MAKE_FAST_ALLOCATED;
+public:
+    JSEventTargetWrapper(EventTarget& wrapped, JSC::JSObject& wrapper)
+        : m_wrapped(wrapped)
+        , m_wrapper(wrapper)
+    { }
+
+    EventTarget& wrapped() { return m_wrapped; }
+
+    operator JSC::JSObject&() { return m_wrapper; }
+
+private:
+    EventTarget& m_wrapped;
+    JSC::JSObject& m_wrapper;
+};
+
+std::unique_ptr<JSEventTargetWrapper> jsEventTargetCast(JSC::VM&, JSC::JSValue thisValue);
+
+template<> struct BindingCaller<JSEventTarget> {
+    using OperationCallerFunction = JSC::EncodedJSValue(JSC::ExecState*, JSEventTargetWrapper*, JSC::ThrowScope&);
+
+    template<OperationCallerFunction operationCaller>
+    static JSC::EncodedJSValue callOperation(JSC::ExecState* state, const char* operationName)
+    {
+        ASSERT(state);
+        JSC::VM& vm = state->vm();
+        auto throwScope = DECLARE_THROW_SCOPE(vm);
+
+        auto thisObject = jsEventTargetCast(vm, state->thisValue().toThis(state, JSC::NotStrictMode));
+        if (UNLIKELY(!thisObject))
+            return throwThisTypeError(*state, throwScope, "EventTarget", operationName);
+
+        if (auto* window = thisObject->wrapped().toDOMWindow()) {
+            if (!window->frame() || !BindingSecurity::shouldAllowAccessToDOMWindow(state, *window, ThrowSecurityError))
+                return JSC::JSValue::encode(JSC::jsUndefined());
+        }
+
+        return operationCaller(state, thisObject.get(), throwScope);
+    }
+};
+
+} // namespace WebCore