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      1 /*
      2  * Copyright (C) 2009 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef JSMessagePortCustom_h
     32 #define JSMessagePortCustom_h
     33 
     34 #include "MessagePort.h"
     35 #include <runtime/JSValue.h>
     36 #include <wtf/Forward.h>
     37 
     38 namespace WebCore {
     39 
     40     typedef int ExceptionCode;
     41 
     42     // Helper function which pulls the values out of a JS sequence and into a MessagePortArray.
     43     // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
     44     // May generate an exception via the passed ExecState.
     45     void fillMessagePortArray(JSC::ExecState*, JSC::JSValue, MessagePortArray&);
     46 
     47     // Helper function to convert from JS postMessage arguments to WebCore postMessage arguments.
     48     template <typename T>
     49     inline JSC::JSValue handlePostMessage(JSC::ExecState* exec, T* impl)
     50     {
     51         PassRefPtr<SerializedScriptValue> message = SerializedScriptValue::create(exec, exec->argument(0));
     52         MessagePortArray portArray;
     53         fillMessagePortArray(exec, exec->argument(1), portArray);
     54         if (exec->hadException())
     55             return JSC::jsUndefined();
     56 
     57         ExceptionCode ec = 0;
     58         impl->postMessage(message, &portArray, ec);
     59         setDOMException(exec, ec);
     60         return JSC::jsUndefined();
     61     }
     62 
     63 }
     64 #endif // JSMessagePortCustom_h
     65