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// Copyright 2013 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/browser/extensions/api/serial/serial_event_dispatcher.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/extensions/api/serial/serial_connection.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/profiles/profile_manager.h"
#include "extensions/browser/event_router.h"
namespace extensions {
namespace api {
namespace {
bool ShouldPauseOnReceiveError(serial::ReceiveError error) {
return error == serial::RECEIVE_ERROR_DEVICE_LOST ||
error == serial::RECEIVE_ERROR_SYSTEM_ERROR ||
error == serial::RECEIVE_ERROR_DISCONNECTED;
}
} // namespace
static base::LazyInstance<BrowserContextKeyedAPIFactory<SerialEventDispatcher> >
g_factory = LAZY_INSTANCE_INITIALIZER;
// static
BrowserContextKeyedAPIFactory<SerialEventDispatcher>*
SerialEventDispatcher::GetFactoryInstance() {
return g_factory.Pointer();
}
// static
SerialEventDispatcher* SerialEventDispatcher::Get(
content::BrowserContext* context) {
return BrowserContextKeyedAPIFactory<SerialEventDispatcher>::Get(context);
}
SerialEventDispatcher::SerialEventDispatcher(content::BrowserContext* context)
: thread_id_(SerialConnection::kThreadId),
profile_(Profile::FromBrowserContext(context)) {
ApiResourceManager<SerialConnection>* manager =
ApiResourceManager<SerialConnection>::Get(profile_);
DCHECK(manager) << "No serial connection manager.";
connections_ = manager->data_;
}
SerialEventDispatcher::~SerialEventDispatcher() {}
SerialEventDispatcher::ReceiveParams::ReceiveParams() {}
SerialEventDispatcher::ReceiveParams::~ReceiveParams() {}
void SerialEventDispatcher::PollConnection(const std::string& extension_id,
int connection_id) {
DCHECK_CURRENTLY_ON(thread_id_);
ReceiveParams params;
params.thread_id = thread_id_;
params.profile_id = profile_;
params.extension_id = extension_id;
params.connections = connections_;
params.connection_id = connection_id;
StartReceive(params);
}
// static
void SerialEventDispatcher::StartReceive(const ReceiveParams& params) {
DCHECK_CURRENTLY_ON(params.thread_id);
SerialConnection* connection =
params.connections->Get(params.extension_id, params.connection_id);
if (!connection)
return;
DCHECK(params.extension_id == connection->owner_extension_id());
if (connection->paused())
return;
connection->Receive(base::Bind(&ReceiveCallback, params));
}
// static
void SerialEventDispatcher::ReceiveCallback(const ReceiveParams& params,
const std::string& data,
serial::ReceiveError error) {
DCHECK_CURRENTLY_ON(params.thread_id);
// Note that an error (e.g. timeout) does not necessarily mean that no data
// was read, so we may fire an onReceive regardless of any error code.
if (data.length() > 0) {
serial::ReceiveInfo receive_info;
receive_info.connection_id = params.connection_id;
receive_info.data = data;
scoped_ptr<base::ListValue> args = serial::OnReceive::Create(receive_info);
scoped_ptr<extensions::Event> event(
new extensions::Event(serial::OnReceive::kEventName, args.Pass()));
PostEvent(params, event.Pass());
}
if (error != serial::RECEIVE_ERROR_NONE) {
serial::ReceiveErrorInfo error_info;
error_info.connection_id = params.connection_id;
error_info.error = error;
scoped_ptr<base::ListValue> args =
serial::OnReceiveError::Create(error_info);
scoped_ptr<extensions::Event> event(
new extensions::Event(serial::OnReceiveError::kEventName, args.Pass()));
PostEvent(params, event.Pass());
if (ShouldPauseOnReceiveError(error)) {
SerialConnection* connection =
params.connections->Get(params.extension_id, params.connection_id);
if (connection)
connection->set_paused(true);
}
}
// Queue up the next read operation.
BrowserThread::PostTask(params.thread_id,
FROM_HERE,
base::Bind(&StartReceive, params));
}
// static
void SerialEventDispatcher::PostEvent(const ReceiveParams& params,
scoped_ptr<extensions::Event> event) {
DCHECK_CURRENTLY_ON(params.thread_id);
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&DispatchEvent,
params.profile_id,
params.extension_id,
base::Passed(event.Pass())));
}
// static
void SerialEventDispatcher::DispatchEvent(void* profile_id,
const std::string& extension_id,
scoped_ptr<extensions::Event> event) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
Profile* profile = reinterpret_cast<Profile*>(profile_id);
if (!g_browser_process->profile_manager()->IsValidProfile(profile))
return;
EventRouter* router = EventRouter::Get(profile);
if (router)
router->DispatchEventToExtension(extension_id, event.Pass());
}
} // namespace api
} // namespace extensions
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