--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/chromium/src/SharedWorkerRepository.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,248 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the name of Google 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER OR 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"
+
+#if ENABLE(SHARED_WORKERS)
+
+#include "SharedWorkerRepository.h"
+
+#include "Event.h"
+#include "EventNames.h"
+#include "InspectorController.h"
+#include "MessagePortChannel.h"
+#include "PlatformMessagePortChannel.h"
+#include "ScriptExecutionContext.h"
+#include "SharedWorker.h"
+#include "WebFrameClient.h"
+#include "WebFrameImpl.h"
+#include "WebKit.h"
+#include "WebKitClient.h"
+#include "WebMessagePortChannel.h"
+#include "WebSharedWorker.h"
+#include "WebSharedWorkerRepository.h"
+#include "WebString.h"
+#include "WebURL.h"
+#include "WorkerScriptLoader.h"
+#include "WorkerScriptLoaderClient.h"
+
+namespace WebCore {
+
+class Document;
+using WebKit::WebFrameImpl;
+using WebKit::WebMessagePortChannel;
+using WebKit::WebSharedWorker;
+using WebKit::WebSharedWorkerRepository;
+
+// Callback class that keeps the SharedWorker and WebSharedWorker objects alive while loads are potentially happening, and also translates load errors into error events on the worker.
+class SharedWorkerScriptLoader : private WorkerScriptLoaderClient, private WebSharedWorker::ConnectListener {
+public:
+ SharedWorkerScriptLoader(PassRefPtr<SharedWorker> worker, const KURL& url, const String& name, PassOwnPtr<MessagePortChannel> port, PassOwnPtr<WebSharedWorker> webWorker)
+ : m_worker(worker)
+ , m_url(url)
+ , m_name(name)
+ , m_webWorker(webWorker)
+ , m_port(port)
+ , m_scriptLoader(ResourceRequestBase::TargetIsSharedWorker)
+ , m_loading(false)
+ , m_responseAppCacheID(0)
+ {
+ }
+
+ ~SharedWorkerScriptLoader();
+ void load();
+ static void stopAllLoadersForContext(ScriptExecutionContext*);
+
+private:
+ // WorkerScriptLoaderClient callback
+ virtual void didReceiveResponse(const ResourceResponse&);
+ virtual void notifyFinished();
+
+ virtual void connected();
+
+ const ScriptExecutionContext* loadingContext() { return m_worker->scriptExecutionContext(); }
+
+ void sendConnect();
+
+ RefPtr<SharedWorker> m_worker;
+ KURL m_url;
+ String m_name;
+ OwnPtr<WebSharedWorker> m_webWorker;
+ OwnPtr<MessagePortChannel> m_port;
+ WorkerScriptLoader m_scriptLoader;
+ bool m_loading;
+ long long m_responseAppCacheID;
+};
+
+static Vector<SharedWorkerScriptLoader*>& pendingLoaders()
+{
+ AtomicallyInitializedStatic(Vector<SharedWorkerScriptLoader*>&, loaders = *new Vector<SharedWorkerScriptLoader*>);
+ return loaders;
+}
+
+void SharedWorkerScriptLoader::stopAllLoadersForContext(ScriptExecutionContext* context)
+{
+ // Walk our list of pending loaders and shutdown any that belong to this context.
+ Vector<SharedWorkerScriptLoader*>& loaders = pendingLoaders();
+ for (unsigned i = 0; i < loaders.size(); ) {
+ SharedWorkerScriptLoader* loader = loaders[i];
+ if (context == loader->loadingContext()) {
+ loaders.remove(i);
+ delete loader;
+ } else
+ i++;
+ }
+}
+
+SharedWorkerScriptLoader::~SharedWorkerScriptLoader()
+{
+ if (m_loading)
+ m_worker->unsetPendingActivity(m_worker.get());
+}
+
+void SharedWorkerScriptLoader::load()
+{
+ ASSERT(!m_loading);
+ // If the shared worker is not yet running, load the script resource for it, otherwise just send it a connect event.
+ if (m_webWorker->isStarted())
+ sendConnect();
+ else {
+ m_scriptLoader.loadAsynchronously(m_worker->scriptExecutionContext(), m_url, DenyCrossOriginRequests, this);
+ // Keep the worker + JS wrapper alive until the resource load is complete in case we need to dispatch an error event.
+ m_worker->setPendingActivity(m_worker.get());
+ m_loading = true;
+ }
+}
+
+// Extracts a WebMessagePortChannel from a MessagePortChannel.
+static WebMessagePortChannel* getWebPort(PassOwnPtr<MessagePortChannel> port)
+{
+ // Extract the WebMessagePortChannel to send to the worker.
+ PlatformMessagePortChannel* platformChannel = port->channel();
+ WebMessagePortChannel* webPort = platformChannel->webChannelRelease();
+ webPort->setClient(0);
+ return webPort;
+}
+
+void SharedWorkerScriptLoader::didReceiveResponse(const ResourceResponse& response)
+{
+ m_responseAppCacheID = response.appCacheID();
+}
+
+void SharedWorkerScriptLoader::notifyFinished()
+{
+ if (m_scriptLoader.failed()) {
+ m_worker->dispatchEvent(Event::create(eventNames().errorEvent, false, true));
+ delete this;
+ } else {
+#if ENABLE(INSPECTOR)
+ if (InspectorController* inspector = m_worker->scriptExecutionContext()->inspectorController())
+ inspector->scriptImported(m_scriptLoader.identifier(), m_scriptLoader.script());
+#endif
+ // Pass the script off to the worker, then send a connect event.
+ m_webWorker->startWorkerContext(m_url, m_name, m_worker->scriptExecutionContext()->userAgent(m_url), m_scriptLoader.script(), m_responseAppCacheID);
+ sendConnect();
+ }
+}
+
+void SharedWorkerScriptLoader::sendConnect()
+{
+ // Send the connect event off, and linger until it is done sending.
+ m_webWorker->connect(getWebPort(m_port.release()), this);
+}
+
+void SharedWorkerScriptLoader::connected()
+{
+ // Connect event has been sent, so free ourselves (this releases the SharedWorker so it can be freed as well if unreferenced).
+ delete this;
+}
+
+bool SharedWorkerRepository::isAvailable()
+{
+ // Allow the WebKitClient to determine if SharedWorkers are available.
+ return WebKit::webKitClient()->sharedWorkerRepository();
+}
+
+static WebSharedWorkerRepository::DocumentID getId(void* document)
+{
+ ASSERT(document);
+ return reinterpret_cast<WebSharedWorkerRepository::DocumentID>(document);
+}
+
+void SharedWorkerRepository::connect(PassRefPtr<SharedWorker> worker, PassOwnPtr<MessagePortChannel> port, const KURL& url, const String& name, ExceptionCode& ec)
+{
+ // This should not be callable unless there's a SharedWorkerRepository for
+ // this context (since isAvailable() should have returned null).
+ ASSERT(WebKit::webKitClient()->sharedWorkerRepository());
+
+ // No nested workers (for now) - connect() should only be called from document context.
+ ASSERT(worker->scriptExecutionContext()->isDocument());
+ Document* document = static_cast<Document*>(worker->scriptExecutionContext());
+ WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame());
+ OwnPtr<WebSharedWorker> webWorker;
+ webWorker = webFrame->client()->createSharedWorker(webFrame, url, name, getId(document));
+
+ if (!webWorker) {
+ // Existing worker does not match this url, so return an error back to the caller.
+ ec = URL_MISMATCH_ERR;
+ return;
+ }
+
+ WebKit::webKitClient()->sharedWorkerRepository()->addSharedWorker(
+ webWorker.get(), getId(document));
+
+ // The loader object manages its own lifecycle (and the lifecycles of the two worker objects).
+ // It will free itself once loading is completed.
+ SharedWorkerScriptLoader* loader = new SharedWorkerScriptLoader(worker, url, name, port, webWorker.release());
+ loader->load();
+}
+
+void SharedWorkerRepository::documentDetached(Document* document)
+{
+ WebSharedWorkerRepository* repo = WebKit::webKitClient()->sharedWorkerRepository();
+ if (repo)
+ repo->documentDetached(getId(document));
+
+ // Stop the creation of any pending SharedWorkers for this context.
+ // FIXME: Need a way to invoke this for WorkerContexts as well when we support for nested workers.
+ SharedWorkerScriptLoader::stopAllLoadersForContext(document);
+}
+
+bool SharedWorkerRepository::hasSharedWorkers(Document* document)
+{
+ WebSharedWorkerRepository* repo = WebKit::webKitClient()->sharedWorkerRepository();
+ return repo && repo->hasSharedWorkers(getId(document));
+}
+
+
+
+} // namespace WebCore
+
+#endif // ENABLE(SHARED_WORKERS)