1 /* 2 * Copyright (C) 2007 Henry Mason (hmason (at) mac.com) 3 * Copyright (C) 2003, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 */ 27 28 #include "config.h" 29 #include "core/events/MessageEvent.h" 30 31 #include "bindings/core/v8/ExceptionMessages.h" 32 #include "bindings/core/v8/ExceptionState.h" 33 #include "bindings/core/v8/custom/V8ArrayBufferCustom.h" 34 35 namespace blink { 36 37 static inline bool isValidSource(EventTarget* source) 38 { 39 return !source || source->toDOMWindow() || source->toMessagePort(); 40 } 41 42 MessageEventInit::MessageEventInit() 43 { 44 } 45 46 MessageEvent::MessageEvent() 47 : m_dataType(DataTypeScriptValue) 48 { 49 } 50 51 MessageEvent::MessageEvent(const AtomicString& type, const MessageEventInit& initializer) 52 : Event(type, initializer) 53 , m_dataType(DataTypeScriptValue) 54 , m_origin(initializer.origin) 55 , m_lastEventId(initializer.lastEventId) 56 , m_source(isValidSource(initializer.source.get()) ? initializer.source : nullptr) 57 , m_ports(adoptPtrWillBeNoop(new MessagePortArray(initializer.ports))) 58 { 59 ASSERT(isValidSource(m_source.get())); 60 } 61 62 MessageEvent::MessageEvent(const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtrWillBeRawPtr<MessagePortArray> ports) 63 : Event(EventTypeNames::message, false, false) 64 , m_dataType(DataTypeScriptValue) 65 , m_origin(origin) 66 , m_lastEventId(lastEventId) 67 , m_source(source) 68 , m_ports(ports) 69 { 70 ASSERT(isValidSource(m_source.get())); 71 } 72 73 MessageEvent::MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtrWillBeRawPtr<MessagePortArray> ports) 74 : Event(EventTypeNames::message, false, false) 75 , m_dataType(DataTypeSerializedScriptValue) 76 , m_dataAsSerializedScriptValue(data) 77 , m_origin(origin) 78 , m_lastEventId(lastEventId) 79 , m_source(source) 80 , m_ports(ports) 81 { 82 if (m_dataAsSerializedScriptValue) 83 m_dataAsSerializedScriptValue->registerMemoryAllocatedWithCurrentScriptContext(); 84 ASSERT(isValidSource(m_source.get())); 85 } 86 87 MessageEvent::MessageEvent(PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, PassRefPtrWillBeRawPtr<EventTarget> source, PassOwnPtr<MessagePortChannelArray> channels) 88 : Event(EventTypeNames::message, false, false) 89 , m_dataType(DataTypeSerializedScriptValue) 90 , m_dataAsSerializedScriptValue(data) 91 , m_origin(origin) 92 , m_lastEventId(lastEventId) 93 , m_source(source) 94 , m_channels(channels) 95 { 96 if (m_dataAsSerializedScriptValue) 97 m_dataAsSerializedScriptValue->registerMemoryAllocatedWithCurrentScriptContext(); 98 ASSERT(isValidSource(m_source.get())); 99 } 100 101 MessageEvent::MessageEvent(const String& data, const String& origin) 102 : Event(EventTypeNames::message, false, false) 103 , m_dataType(DataTypeString) 104 , m_dataAsString(data) 105 , m_origin(origin) 106 { 107 } 108 109 MessageEvent::MessageEvent(PassRefPtrWillBeRawPtr<Blob> data, const String& origin) 110 : Event(EventTypeNames::message, false, false) 111 , m_dataType(DataTypeBlob) 112 , m_dataAsBlob(data) 113 , m_origin(origin) 114 { 115 } 116 117 MessageEvent::MessageEvent(PassRefPtr<ArrayBuffer> data, const String& origin) 118 : Event(EventTypeNames::message, false, false) 119 , m_dataType(DataTypeArrayBuffer) 120 , m_dataAsArrayBuffer(data) 121 , m_origin(origin) 122 { 123 } 124 125 MessageEvent::~MessageEvent() 126 { 127 } 128 129 PassRefPtrWillBeRawPtr<MessageEvent> MessageEvent::create(const AtomicString& type, const MessageEventInit& initializer, ExceptionState& exceptionState) 130 { 131 if (initializer.source.get() && !isValidSource(initializer.source.get())) { 132 exceptionState.throwTypeError("The optional 'source' property is neither a Window nor MessagePort."); 133 return nullptr; 134 } 135 return adoptRefWillBeNoop(new MessageEvent(type, initializer)); 136 } 137 138 void MessageEvent::initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, const String& origin, const String& lastEventId, LocalDOMWindow* source, PassOwnPtrWillBeRawPtr<MessagePortArray> ports) 139 { 140 if (dispatched()) 141 return; 142 143 initEvent(type, canBubble, cancelable); 144 145 m_dataType = DataTypeScriptValue; 146 m_origin = origin; 147 m_lastEventId = lastEventId; 148 m_source = source; 149 m_ports = ports; 150 } 151 152 void MessageEvent::initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, LocalDOMWindow* source, PassOwnPtrWillBeRawPtr<MessagePortArray> ports) 153 { 154 if (dispatched()) 155 return; 156 157 initEvent(type, canBubble, cancelable); 158 159 m_dataType = DataTypeSerializedScriptValue; 160 m_dataAsSerializedScriptValue = data; 161 m_origin = origin; 162 m_lastEventId = lastEventId; 163 m_source = source; 164 m_ports = ports; 165 166 if (m_dataAsSerializedScriptValue) 167 m_dataAsSerializedScriptValue->registerMemoryAllocatedWithCurrentScriptContext(); 168 } 169 170 const AtomicString& MessageEvent::interfaceName() const 171 { 172 return EventNames::MessageEvent; 173 } 174 175 void MessageEvent::entangleMessagePorts(ExecutionContext* context) 176 { 177 m_ports = MessagePort::entanglePorts(*context, m_channels.release()); 178 } 179 180 void MessageEvent::trace(Visitor* visitor) 181 { 182 visitor->trace(m_dataAsBlob); 183 visitor->trace(m_source); 184 #if ENABLE(OILPAN) 185 visitor->trace(m_ports); 186 #endif 187 Event::trace(visitor); 188 } 189 190 v8::Handle<v8::Object> MessageEvent::associateWithWrapper(const WrapperTypeInfo* wrapperType, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate) 191 { 192 Event::associateWithWrapper(wrapperType, wrapper, isolate); 193 194 // Ensures a wrapper is created for the data to return now so that V8 knows how 195 // much memory is used via the wrapper. To keep the wrapper alive, it's set to 196 // the wrapper of the MessageEvent as a hidden value. 197 switch (dataType()) { 198 case MessageEvent::DataTypeScriptValue: 199 case MessageEvent::DataTypeSerializedScriptValue: 200 break; 201 case MessageEvent::DataTypeString: 202 V8HiddenValue::setHiddenValue(isolate, wrapper, V8HiddenValue::stringData(isolate), v8String(isolate, dataAsString())); 203 break; 204 case MessageEvent::DataTypeBlob: 205 break; 206 case MessageEvent::DataTypeArrayBuffer: 207 V8HiddenValue::setHiddenValue(isolate, wrapper, V8HiddenValue::arrayBufferData(isolate), toV8(dataAsArrayBuffer(), wrapper, isolate)); 208 break; 209 } 210 211 return wrapper; 212 } 213 214 } // namespace blink 215