/platform/external/webkit/WebCore/bindings/v8/custom/V8MessagePortCustom.cpp

https://github.com/aharish/totoro-gb-opensource-update2 · C++ · 136 lines · 90 code · 14 blank · 32 comment · 12 complexity · 15a1720db8ea0846260fc2fbb40a3c1d MD5 · raw file

  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. #include "config.h"
  31. #include "ExceptionCode.h"
  32. #include "MessagePort.h"
  33. #include "SerializedScriptValue.h"
  34. #include "V8Binding.h"
  35. #include "V8MessagePortCustom.h"
  36. #include "V8MessagePort.h"
  37. #include "V8Proxy.h"
  38. #include "V8Utilities.h"
  39. #include "WorkerContextExecutionProxy.h"
  40. namespace WebCore {
  41. v8::Handle<v8::Value> V8MessagePort::addEventListenerCallback(const v8::Arguments& args)
  42. {
  43. INC_STATS("DOM.MessagePort.addEventListener()");
  44. MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
  45. RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOrCreate);
  46. if (listener) {
  47. String type = toWebCoreString(args[0]);
  48. bool useCapture = args[2]->BooleanValue();
  49. messagePort->addEventListener(type, listener, useCapture);
  50. createHiddenDependency(args.Holder(), args[1], cacheIndex);
  51. }
  52. return v8::Undefined();
  53. }
  54. v8::Handle<v8::Value> V8MessagePort::removeEventListenerCallback(const v8::Arguments& args)
  55. {
  56. INC_STATS("DOM.MessagePort.removeEventListener()");
  57. MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
  58. RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOnly);
  59. if (listener) {
  60. String type = toWebCoreString(args[0]);
  61. bool useCapture = args[2]->BooleanValue();
  62. messagePort->removeEventListener(type, listener.get(), useCapture);
  63. removeHiddenDependency(args.Holder(), args[1], cacheIndex);
  64. }
  65. return v8::Undefined();
  66. }
  67. v8::Handle<v8::Value> V8MessagePort::postMessageCallback(const v8::Arguments& args)
  68. {
  69. INC_STATS("DOM.MessagePort.postMessage");
  70. MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
  71. RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(args[0]);
  72. MessagePortArray portArray;
  73. if (args.Length() > 1) {
  74. if (!getMessagePortArray(args[1], portArray))
  75. return v8::Undefined();
  76. }
  77. ExceptionCode ec = 0;
  78. messagePort->postMessage(message.release(), &portArray, ec);
  79. return throwError(ec);
  80. }
  81. bool getMessagePortArray(v8::Local<v8::Value> value, MessagePortArray& portArray)
  82. {
  83. if (isUndefinedOrNull(value)) {
  84. portArray.resize(0);
  85. return true;
  86. }
  87. if (!value->IsObject()) {
  88. throwError("MessagePortArray argument must be an object");
  89. return false;
  90. }
  91. uint32_t length = 0;
  92. v8::Local<v8::Object> ports = v8::Local<v8::Object>::Cast(value);
  93. if (value->IsArray()) {
  94. v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
  95. length = array->Length();
  96. } else {
  97. // Sequence-type object - get the length attribute
  98. v8::Local<v8::Value> sequenceLength = ports->Get(v8::String::New("length"));
  99. if (!sequenceLength->IsNumber()) {
  100. throwError("MessagePortArray argument has no length attribute");
  101. return false;
  102. }
  103. length = sequenceLength->Uint32Value();
  104. }
  105. portArray.resize(length);
  106. for (unsigned int i = 0; i < length; ++i) {
  107. v8::Local<v8::Value> port = ports->Get(v8::Integer::New(i));
  108. // Validation of non-null objects, per HTML5 spec 8.3.3.
  109. if (isUndefinedOrNull(port)) {
  110. throwError(INVALID_STATE_ERR);
  111. return false;
  112. }
  113. // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
  114. if (!V8MessagePort::HasInstance(port)) {
  115. throwError("MessagePortArray argument must contain only MessagePorts");
  116. return false;
  117. }
  118. portArray[i] = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(port));
  119. }
  120. return true;
  121. }
  122. } // namespace WebCore