webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 96 insertions, 0 deletions

diff --git a/Source/WebCore/bindings/js/ReadableStreamDefaultController.cpp b/Source/WebCore/bindings/js/ReadableStreamDefaultController.cpp
new file mode 100644
index 000000000..080cf7013
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+++ b/Source/WebCore/bindings/js/ReadableStreamDefaultController.cpp
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+/*
+ * Copyright (C) 2016 Canon Inc.
+ * 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 required to be 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.
+ * 3.  Neither the name of Canon 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 CANON 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 CANON INC. AND 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.
+ */
+
+
+#include "config.h"
+#include "ReadableStreamDefaultController.h"
+
+#if ENABLE(READABLE_STREAM_API)
+
+#include "WebCoreJSClientData.h"
+#include <heap/HeapInlines.h>
+#include <runtime/IdentifierInlines.h>
+#include <runtime/JSObjectInlines.h>
+
+namespace WebCore {
+
+static inline JSC::JSValue callFunction(JSC::ExecState& state, JSC::JSValue jsFunction, JSC::JSValue thisValue, const JSC::ArgList& arguments)
+{
+    JSC::CallData callData;
+    auto callType = JSC::getCallData(jsFunction, callData);
+    return call(&state, jsFunction, callType, callData, thisValue, arguments);
+}
+
+JSC::JSValue ReadableStreamDefaultController::invoke(JSC::ExecState& state, JSC::JSObject& object, const char* propertyName, JSC::JSValue parameter)
+{
+    JSC::VM& vm = state.vm();
+    JSC::JSLockHolder lock(vm);
+    auto scope = DECLARE_THROW_SCOPE(vm);
+
+    auto function = object.get(&state, JSC::Identifier::fromString(&state, propertyName));
+    RETURN_IF_EXCEPTION(scope, JSC::JSValue());
+
+    if (!function.isFunction()) {
+        if (!function.isUndefined())
+            throwTypeError(&state, scope, ASCIILiteral("ReadableStream trying to call a property that is not callable"));
+        return JSC::jsUndefined();
+    }
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(parameter);
+
+    return callFunction(state, function, &object, arguments);
+}
+
+bool ReadableStreamDefaultController::isControlledReadableStreamLocked() const
+{
+    auto& globalObject = this->globalObject();
+    JSC::VM& vm = globalObject.vm();
+    JSC::JSLockHolder lock(vm);
+    auto scope = DECLARE_CATCH_SCOPE(vm);
+    auto& state = globalExec();
+
+    auto& clientData = *static_cast<JSVMClientData*>(vm.clientData);
+    auto readableStream = m_jsController->get(&state, clientData.builtinNames().controlledReadableStreamPrivateName());
+    ASSERT_UNUSED(scope, !scope.exception());
+
+    auto* isLocked = globalObject.builtinInternalFunctions().readableStreamInternals().m_isReadableStreamLockedFunction.get();
+    ASSERT(isLocked);
+
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(readableStream);
+    auto result = callFunction(state, isLocked, JSC::jsUndefined(), arguments);
+    ASSERT(!scope.exception());
+
+    return result.isTrue();
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(READABLE_STREAM_API)