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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/renderer/webworker_proxy.h"
#include "chrome/common/child_thread.h"
#include "chrome/common/render_messages.h"
#include "chrome/common/webmessageportchannel_impl.h"
#include "chrome/common/worker_messages.h"
#include "webkit/api/public/WebURL.h"
#include "webkit/api/public/WebWorkerClient.h"
using WebKit::WebMessagePortChannel;
using WebKit::WebMessagePortChannelArray;
using WebKit::WebString;
using WebKit::WebURL;
using WebKit::WebWorkerClient;
WebWorkerProxy::WebWorkerProxy(
WebWorkerClient* client,
ChildThread* child_thread,
int render_view_route_id)
: route_id_(MSG_ROUTING_NONE),
child_thread_(child_thread),
render_view_route_id_(render_view_route_id),
client_(client) {
}
WebWorkerProxy::~WebWorkerProxy() {
Disconnect();
for (size_t i = 0; i < queued_messages_.size(); ++i)
delete queued_messages_[i];
}
void WebWorkerProxy::Disconnect() {
if (route_id_ == MSG_ROUTING_NONE)
return;
// So the messages from WorkerContext (like WorkerContextDestroyed) do not
// come after nobody is listening. Since Worker and WorkerContext can
// terminate independently, already sent messages may still be in the pipe.
child_thread_->RemoveRoute(route_id_);
// Tell the browser to not start our queued worker.
if (!queued_messages_.empty())
child_thread_->Send(new ViewHostMsg_CancelCreateDedicatedWorker(route_id_));
route_id_ = MSG_ROUTING_NONE;
}
void WebWorkerProxy::startWorkerContext(
const WebURL& script_url,
const WebString& user_agent,
const WebString& source_code) {
child_thread_->Send(new ViewHostMsg_CreateDedicatedWorker(
script_url, render_view_route_id_, &route_id_));
if (route_id_ == MSG_ROUTING_NONE)
return;
child_thread_->AddRoute(route_id_, this);
// We make sure that the start message is the first, since postMessage might
// have already been called.
queued_messages_.insert(queued_messages_.begin(),
new WorkerMsg_StartWorkerContext(
route_id_, script_url, user_agent, source_code));
}
void WebWorkerProxy::terminateWorkerContext() {
if (route_id_ != MSG_ROUTING_NONE) {
Send(new WorkerMsg_TerminateWorkerContext(route_id_));
Disconnect();
}
}
void WebWorkerProxy::postMessageToWorkerContext(
const WebString& message, const WebMessagePortChannelArray& channels) {
std::vector<int> message_port_ids(channels.size());
std::vector<int> routing_ids(channels.size());
for (size_t i = 0; i < channels.size(); ++i) {
WebMessagePortChannelImpl* webchannel =
static_cast<WebMessagePortChannelImpl*>(channels[i]);
message_port_ids[i] = webchannel->message_port_id();
webchannel->QueueMessages();
routing_ids[i] = MSG_ROUTING_NONE;
DCHECK(message_port_ids[i] != MSG_ROUTING_NONE);
}
Send(new WorkerMsg_PostMessage(
route_id_, message, message_port_ids, routing_ids));
}
void WebWorkerProxy::workerObjectDestroyed() {
Send(new WorkerMsg_WorkerObjectDestroyed(route_id_));
delete this;
}
bool WebWorkerProxy::Send(IPC::Message* message) {
// It's possible that postMessage is called before the worker is created, in
// which case route_id_ will be none. Or the worker object can be interacted
// with before the browser process told us that it started, in which case we
// also want to queue the message.
if (route_id_ == MSG_ROUTING_NONE || !queued_messages_.empty()) {
queued_messages_.push_back(message);
return true;
}
// For now we proxy all messages to the worker process through the browser.
// Revisit if we find this slow.
// TODO(jabdelmalek): handle sync messages if we need them.
IPC::Message* wrapped_msg = new ViewHostMsg_ForwardToWorker(*message);
delete message;
return child_thread_->Send(wrapped_msg);
}
void WebWorkerProxy::OnMessageReceived(const IPC::Message& message) {
if (!client_)
return;
IPC_BEGIN_MESSAGE_MAP(WebWorkerProxy, message)
IPC_MESSAGE_HANDLER(ViewMsg_DedicatedWorkerCreated,
OnDedicatedWorkerCreated)
IPC_MESSAGE_HANDLER(WorkerMsg_PostMessage, OnPostMessage)
IPC_MESSAGE_FORWARD(WorkerHostMsg_PostExceptionToWorkerObject,
client_,
WebWorkerClient::postExceptionToWorkerObject)
IPC_MESSAGE_HANDLER(WorkerHostMsg_PostConsoleMessageToWorkerObject,
OnPostConsoleMessageToWorkerObject)
IPC_MESSAGE_FORWARD(WorkerHostMsg_ConfirmMessageFromWorkerObject,
client_,
WebWorkerClient::confirmMessageFromWorkerObject)
IPC_MESSAGE_FORWARD(WorkerHostMsg_ReportPendingActivity,
client_,
WebWorkerClient::reportPendingActivity)
IPC_MESSAGE_FORWARD(WorkerHostMsg_WorkerContextDestroyed,
client_,
WebWorkerClient::workerContextDestroyed)
IPC_END_MESSAGE_MAP()
}
void WebWorkerProxy::OnDedicatedWorkerCreated() {
DCHECK(queued_messages_.size());
std::vector<IPC::Message*> queued_messages = queued_messages_;
queued_messages_.clear();
for (size_t i = 0; i < queued_messages.size(); ++i) {
queued_messages[i]->set_routing_id(route_id_);
Send(queued_messages[i]);
}
}
void WebWorkerProxy::OnPostMessage(
const string16& message,
const std::vector<int>& sent_message_port_ids,
const std::vector<int>& new_routing_ids) {
DCHECK(new_routing_ids.size() == sent_message_port_ids.size());
WebMessagePortChannelArray channels(sent_message_port_ids.size());
for (size_t i = 0; i < sent_message_port_ids.size(); ++i) {
channels[i] = new WebMessagePortChannelImpl(
new_routing_ids[i], sent_message_port_ids[i]);
}
client_->postMessageToWorkerObject(message, channels);
}
void WebWorkerProxy::OnPostConsoleMessageToWorkerObject(
const WorkerHostMsg_PostConsoleMessageToWorkerObject_Params& params) {
client_->postConsoleMessageToWorkerObject(params.destination_identifier,
params.source_identifier, params.message_type, params.message_level,
params.message, params.line_number, params.source_url);
}
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