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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 #include "config.h" | |
| 32 #include "WebWorkerBase.h" | |
| 33 | |
| 34 #include "GenericWorkerTask.h" | |
| 35 #include "MessagePortChannel.h" | |
| 36 #include "PlatformMessagePortChannel.h" | |
| 37 | |
| 38 #include "WebDataSourceImpl.h" | |
| 39 #include "WebFrameClient.h" | |
| 40 #include "WebFrameImpl.h" | |
| 41 #include "WebMessagePortChannel.h" | |
| 42 #include "WebView.h" | |
| 43 #include "WebWorkerClient.h" | |
| 44 | |
| 45 #include "WorkerThread.h" | |
| 46 #include <wtf/MainThread.h> | |
| 47 | |
| 48 using namespace WebCore; | |
| 49 | |
| 50 namespace WebKit { | |
| 51 | |
| 52 #if ENABLE(WORKERS) | |
| 53 | |
| 54 // Dummy WebViewDelegate - we only need it in Worker process to load a | |
| 55 // 'shadow page' which will initialize WebCore loader. | |
| 56 class WorkerWebFrameClient : public WebFrameClient { | |
| 57 public: | |
| 58 // Tell the loader to load the data into the 'shadow page' synchronously, | |
| 59 // so we can grab the resulting Document right after load. | |
| 60 virtual void didCreateDataSource(WebFrame* frame, WebDataSource* ds) | |
| 61 { | |
| 62 static_cast<WebDataSourceImpl*>(ds)->setDeferMainResourceDataLoad(false); | |
| 63 } | |
| 64 | |
| 65 // Lazy allocate and leak this instance. | |
| 66 static WorkerWebFrameClient* sharedInstance() | |
| 67 { | |
| 68 static WorkerWebFrameClient client; | |
| 69 return &client; | |
| 70 } | |
| 71 | |
| 72 private: | |
| 73 WorkerWebFrameClient() | |
| 74 { | |
| 75 } | |
| 76 }; | |
| 77 | |
| 78 // This function is called on the main thread to force to initialize some static | |
| 79 // values used in WebKit before any worker thread is started. This is because in | |
| 80 // our worker processs, we do not run any WebKit code in main thread and thus | |
| 81 // when multiple workers try to start at the same time, we might hit crash due | |
| 82 // to contention for initializing static values. | |
| 83 static void initializeWebKitStaticValues() | |
| 84 { | |
| 85 static bool initialized = false; | |
| 86 if (!initialized) { | |
| 87 initialized = true; | |
| 88 // Note that we have to pass a URL with valid protocol in order to follow | |
| 89 // the path to do static value initializations. | |
| 90 RefPtr<SecurityOrigin> origin = | |
| 91 SecurityOrigin::create(KURL(ParsedURLString, "http://localhost")); | |
| 92 origin.release(); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 WebWorkerBase::WebWorkerBase() | |
| 97 : m_webView(0) | |
| 98 , m_askedToTerminate(false) | |
| 99 { | |
| 100 initializeWebKitStaticValues(); | |
| 101 } | |
| 102 | |
| 103 WebWorkerBase::~WebWorkerBase() | |
| 104 { | |
| 105 ASSERT(m_webView); | |
| 106 m_webView->close(); | |
| 107 } | |
| 108 | |
| 109 void WebWorkerBase::stopWorkerThread() | |
| 110 { | |
| 111 if (m_askedToTerminate) | |
| 112 return; | |
| 113 m_askedToTerminate = true; | |
| 114 if (m_workerThread) | |
| 115 m_workerThread->stop(); | |
| 116 } | |
| 117 | |
| 118 void WebWorkerBase::initializeLoader(const WebURL& url) | |
| 119 { | |
| 120 // Create 'shadow page'. This page is never displayed, it is used to proxy the | |
| 121 // loading requests from the worker context to the rest of WebKit and Chromium | |
| 122 // infrastructure. | |
| 123 ASSERT(!m_webView); | |
| 124 m_webView = WebView::create(0); | |
| 125 m_webView->initializeMainFrame(WorkerWebFrameClient::sharedInstance()); | |
| 126 | |
| 127 WebFrameImpl* webFrame = static_cast<WebFrameImpl*>(m_webView->mainFrame()); | |
| 128 | |
| 129 // Construct substitute data source for the 'shadow page'. We only need it | |
| 130 // to have same origin as the worker so the loading checks work correctly. | |
| 131 CString content(""); | |
| 132 int len = static_cast<int>(content.length()); | |
| 133 RefPtr<SharedBuffer> buf(SharedBuffer::create(content.data(), len)); | |
| 134 SubstituteData substData(buf, String("text/html"), String("UTF-8"), KURL()); | |
| 135 ResourceRequest request(url, CString()); | |
| 136 webFrame->frame()->loader()->load(request, substData, false); | |
| 137 | |
| 138 // This document will be used as 'loading context' for the worker. | |
| 139 m_loadingDocument = webFrame->frame()->document(); | |
| 140 } | |
| 141 | |
| 142 void WebWorkerBase::dispatchTaskToMainThread(PassOwnPtr<ScriptExecutionContext::Task> task) | |
| 143 { | |
| 144 return callOnMainThread(invokeTaskMethod, task.release()); | |
| 145 } | |
| 146 | |
| 147 void WebWorkerBase::invokeTaskMethod(void* param) | |
| 148 { | |
| 149 ScriptExecutionContext::Task* task = | |
| 150 static_cast<ScriptExecutionContext::Task*>(param); | |
| 151 task->performTask(0); | |
| 152 delete task; | |
| 153 } | |
| 154 | |
| 155 // WorkerObjectProxy ----------------------------------------------------------- | |
| 156 | |
| 157 void WebWorkerBase::postMessageToWorkerObject(PassRefPtr<SerializedScriptValue> message, | |
| 158 PassOwnPtr<MessagePortChannelArray> channels) | |
| 159 { | |
| 160 dispatchTaskToMainThread(createCallbackTask(&postMessageTask, this, | |
| 161 message->toString(), channels)); | |
| 162 } | |
| 163 | |
| 164 void WebWorkerBase::postMessageTask(ScriptExecutionContext* context, | |
| 165 WebWorkerBase* thisPtr, | |
| 166 String message, | |
| 167 PassOwnPtr<MessagePortChannelArray> channels) | |
| 168 { | |
| 169 if (!thisPtr->client()) | |
| 170 return; | |
| 171 | |
| 172 WebMessagePortChannelArray webChannels(channels.get() ? channels->size() : 0); | |
| 173 for (size_t i = 0; i < webChannels.size(); ++i) { | |
| 174 webChannels[i] = (*channels)[i]->channel()->webChannelRelease(); | |
| 175 webChannels[i]->setClient(0); | |
| 176 } | |
| 177 | |
| 178 thisPtr->client()->postMessageToWorkerObject(message, webChannels); | |
| 179 } | |
| 180 | |
| 181 void WebWorkerBase::postExceptionToWorkerObject(const String& errorMessage, | |
| 182 int lineNumber, | |
| 183 const String& sourceURL) | |
| 184 { | |
| 185 dispatchTaskToMainThread(createCallbackTask(&postExceptionTask, this, | |
| 186 errorMessage, lineNumber, | |
| 187 sourceURL)); | |
| 188 } | |
| 189 | |
| 190 void WebWorkerBase::postExceptionTask(ScriptExecutionContext* context, | |
| 191 WebWorkerBase* thisPtr, | |
| 192 const String& errorMessage, | |
| 193 int lineNumber, const String& sourceURL) | |
| 194 { | |
| 195 if (!thisPtr->commonClient()) | |
| 196 return; | |
| 197 | |
| 198 thisPtr->commonClient()->postExceptionToWorkerObject(errorMessage, | |
| 199 lineNumber, | |
| 200 sourceURL); | |
| 201 } | |
| 202 | |
| 203 void WebWorkerBase::postConsoleMessageToWorkerObject(MessageDestination destination, | |
| 204 MessageSource source, | |
| 205 MessageType type, | |
| 206 MessageLevel level, | |
| 207 const String& message, | |
| 208 int lineNumber, | |
| 209 const String& sourceURL) | |
| 210 { | |
| 211 dispatchTaskToMainThread(createCallbackTask(&postConsoleMessageTask, this, | |
| 212 static_cast<int>(destination), | |
| 213 static_cast<int>(source), | |
| 214 static_cast<int>(type), | |
| 215 static_cast<int>(level), | |
| 216 message, lineNumber, sourceURL)); | |
| 217 } | |
| 218 | |
| 219 void WebWorkerBase::postConsoleMessageTask(ScriptExecutionContext* context, | |
| 220 WebWorkerBase* thisPtr, | |
| 221 int destination, int source, | |
| 222 int type, int level, | |
| 223 const String& message, | |
| 224 int lineNumber, | |
| 225 const String& sourceURL) | |
| 226 { | |
| 227 if (!thisPtr->commonClient()) | |
| 228 return; | |
| 229 thisPtr->commonClient()->postConsoleMessageToWorkerObject(destination, source, | |
| 230 type, level, message, | |
| 231 lineNumber, sourceURL); | |
| 232 } | |
| 233 | |
| 234 void WebWorkerBase::confirmMessageFromWorkerObject(bool hasPendingActivity) | |
| 235 { | |
| 236 dispatchTaskToMainThread(createCallbackTask(&confirmMessageTask, this, | |
| 237 hasPendingActivity)); | |
| 238 } | |
| 239 | |
| 240 void WebWorkerBase::confirmMessageTask(ScriptExecutionContext* context, | |
| 241 WebWorkerBase* thisPtr, | |
| 242 bool hasPendingActivity) | |
| 243 { | |
| 244 if (!thisPtr->client()) | |
| 245 return; | |
| 246 thisPtr->client()->confirmMessageFromWorkerObject(hasPendingActivity); | |
| 247 } | |
| 248 | |
| 249 void WebWorkerBase::reportPendingActivity(bool hasPendingActivity) | |
| 250 { | |
| 251 dispatchTaskToMainThread(createCallbackTask(&reportPendingActivityTask, | |
| 252 this, hasPendingActivity)); | |
| 253 } | |
| 254 | |
| 255 void WebWorkerBase::reportPendingActivityTask(ScriptExecutionContext* context, | |
| 256 WebWorkerBase* thisPtr, | |
| 257 bool hasPendingActivity) | |
| 258 { | |
| 259 if (!thisPtr->client()) | |
| 260 return; | |
| 261 thisPtr->client()->reportPendingActivity(hasPendingActivity); | |
| 262 } | |
| 263 | |
| 264 void WebWorkerBase::workerContextClosed() | |
| 265 { | |
| 266 dispatchTaskToMainThread(createCallbackTask(&workerContextClosedTask, | |
| 267 this)); | |
| 268 } | |
| 269 | |
| 270 void WebWorkerBase::workerContextClosedTask(ScriptExecutionContext* context, | |
| 271 WebWorkerBase* thisPtr) | |
| 272 { | |
| 273 if (thisPtr->commonClient()) | |
| 274 thisPtr->commonClient()->workerContextClosed(); | |
| 275 } | |
| 276 | |
| 277 void WebWorkerBase::workerContextDestroyed() | |
| 278 { | |
| 279 dispatchTaskToMainThread(createCallbackTask(&workerContextDestroyedTask, | |
| 280 this)); | |
| 281 } | |
| 282 | |
| 283 void WebWorkerBase::workerContextDestroyedTask(ScriptExecutionContext* context, | |
| 284 WebWorkerBase* thisPtr) | |
| 285 { | |
| 286 if (thisPtr->commonClient()) | |
| 287 thisPtr->commonClient()->workerContextDestroyed(); | |
| 288 // The lifetime of this proxy is controlled by the worker context. | |
| 289 delete thisPtr; | |
| 290 } | |
| 291 | |
| 292 // WorkerLoaderProxy ----------------------------------------------------------- | |
| 293 | |
| 294 void WebWorkerBase::postTaskToLoader(PassOwnPtr<ScriptExecutionContext::Task> task) | |
| 295 { | |
| 296 ASSERT(m_loadingDocument->isDocument()); | |
| 297 m_loadingDocument->postTask(task); | |
| 298 } | |
| 299 | |
| 300 void WebWorkerBase::postTaskForModeToWorkerContext( | |
| 301 PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode) | |
| 302 { | |
| 303 m_workerThread->runLoop().postTaskForMode(task, mode); | |
| 304 } | |
| 305 | |
| 306 #endif // ENABLE(WORKERS) | |
| 307 | |
| 308 } // namespace WebKit | |
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Chromium Code Reviews
Issue 385057:
Deleted webkit/api which now lives in webkit.org (Closed)
