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/*
* 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 "MessagePortChannel.h"
#include "PlatformMessagePortChannel.h"
#include "ScriptExecutionContext.h"
#include "SharedWorker.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::WebMessagePortChannel;
using WebKit::WebSharedWorker;
using WebKit::WebSharedWorkerRepository;
// Callback class that keeps the Worker object alive while loads are potentially happening, and also translates load errors into error events on the worker.
class SharedWorkerScriptLoader : public RefCounted<SharedWorkerScriptLoader>, private WorkerScriptLoaderClient {
public:
SharedWorkerScriptLoader(PassRefPtr<SharedWorker> worker, PassOwnPtr<MessagePortChannel> port, PassOwnPtr<WebSharedWorker> webWorker)
: m_worker(worker)
, m_webWorker(webWorker)
, m_port(port)
{
}
void load(const KURL&);
private:
// WorkerScriptLoaderClient callback
virtual void notifyFinished();
RefPtr<SharedWorker> m_worker;
OwnPtr<WebSharedWorker> m_webWorker;
OwnPtr<MessagePortChannel> m_port;
WorkerScriptLoader m_scriptLoader;
};
void SharedWorkerScriptLoader::load(const KURL& url)
{
m_scriptLoader.loadAsynchronously(m_worker->scriptExecutionContext(), 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::notifyFinished()
{
if (m_scriptLoader.failed())
m_worker->dispatchEvent(Event::create(eventNames().errorEvent, false, true));
else {
m_webWorker->startWorkerContext(m_scriptLoader.url(), m_worker->scriptExecutionContext()->userAgent(m_scriptLoader.url()), m_scriptLoader.script());
m_webWorker->connect(getWebPort(m_port.release()));
}
// 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()
{
// SharedWorkers are disabled for now until the implementation is further along.
// FIXME(atwilson): Add code to check for a runtime flag like so:
// return commandLineFlag && WebKit::webKitClient()->sharedWorkerRepository();
return false;
}
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)
{
ScriptExecutionContext* context = worker->scriptExecutionContext();
// No nested workers (for now) - connect() should only be called from document context.
ASSERT(context->isDocument());
OwnPtr<WebSharedWorker> webWorker;
ASSERT(WebKit::webKitClient()->sharedWorkerRepository());
webWorker = WebKit::webKitClient()->sharedWorkerRepository()->lookup(url, name, getId(context));
if (!webWorker) {
// Existing worker does not match this url, so return an error back to the caller.
ec = URL_MISMATCH_ERR;
return;
}
if (!webWorker->isStarted()) {
// Need to kick off a load for the worker. The loader will connect to the worker once the script has been loaded, then free itself.
SharedWorkerScriptLoader* loader = new SharedWorkerScriptLoader(worker, port.release(), webWorker.release());
loader->load(url);
} else
webWorker->connect(getWebPort(port.release()));
}
void SharedWorkerRepository::documentDetached(Document* document)
{
WebSharedWorkerRepository* repo = WebKit::webKitClient()->sharedWorkerRepository();
if (repo)
repo->documentDetached(getId(document));
}
bool SharedWorkerRepository::hasSharedWorkers(Document* document)
{
WebSharedWorkerRepository* repo = WebKit::webKitClient()->sharedWorkerRepository();
return repo && repo->hasSharedWorkers(getId(document));
}
} // namespace WebCore
#endif // ENABLE(SHARED_WORKERS)
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