Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 249 insertions, 0 deletions

diff --git a/Source/WebKit/chromium/src/SharedWorkerRepository.cpp b/Source/WebKit/chromium/src/SharedWorkerRepository.cpp
new file mode 100644
index 000000000..17f5dc210
--- /dev/null
+++ b/Source/WebKit/chromium/src/SharedWorkerRepository.cpp
@@ -0,0 +1,249 @@
+/*
+ * 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 "ExceptionCode.h"
+#include "InspectorInstrumentation.h"
+#include "MessagePortChannel.h"
+#include "PlatformMessagePortChannel.h"
+#include "ScriptExecutionContext.h"
+#include "SharedWorker.h"
+#include "WebFrameClient.h"
+#include "WebFrameImpl.h"
+#include "WebKit.h"
+#include "platform/WebKitPlatformSupport.h"
+#include "WebMessagePortChannel.h"
+#include "WebSharedWorker.h"
+#include "WebSharedWorkerRepository.h"
+#include "platform/WebString.h"
+#include "platform/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(WorkerScriptLoader::create())
+        , m_loading(false)
+        , m_responseAppCacheID(0)
+    {
+        m_scriptLoader->setTargetType(ResourceRequest::TargetIsSharedWorker);
+    }
+
+    ~SharedWorkerScriptLoader();
+    void load();
+    static void stopAllLoadersForContext(ScriptExecutionContext*);
+
+private:
+    // WorkerScriptLoaderClient callbacks
+    virtual void didReceiveResponse(unsigned long identifier, 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;
+    RefPtr<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 {
+        // 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;
+
+        m_scriptLoader->loadAsynchronously(m_worker->scriptExecutionContext(), m_url, DenyCrossOriginRequests, this);
+    }
+}
+
+// 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(unsigned long identifier, const ResourceResponse& response)
+{
+    m_responseAppCacheID = response.appCacheID();
+    InspectorInstrumentation::didReceiveScriptResponse(m_worker->scriptExecutionContext(), identifier);
+}
+
+void SharedWorkerScriptLoader::notifyFinished()
+{
+    if (m_scriptLoader->failed()) {
+        m_worker->dispatchEvent(Event::create(eventNames().errorEvent, false, true));
+        delete this;
+    } else {
+        InspectorInstrumentation::scriptImported(m_worker->scriptExecutionContext(), m_scriptLoader->identifier(), m_scriptLoader->script());
+        // 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 WebKitPlatformSupport to determine if SharedWorkers are available.
+    return WebKit::webKitPlatformSupport()->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::webKitPlatformSupport()->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 = adoptPtr(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::webKitPlatformSupport()->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::webKitPlatformSupport()->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::webKitPlatformSupport()->sharedWorkerRepository();
+    return repo && repo->hasSharedWorkers(getId(document));
+}
+
+
+
+} // namespace WebCore
+
+#endif // ENABLE(SHARED_WORKERS)