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// Copyright (c) 2011 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 "remoting/host/desktop_environment.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "remoting/host/capturer.h"
#include "remoting/host/chromoting_host.h"
#include "remoting/host/chromoting_host_context.h"
#include "remoting/host/continue_window.h"
#include "remoting/host/curtain.h"
#include "remoting/host/disconnect_window.h"
#include "remoting/host/event_executor.h"
#include "remoting/host/local_input_monitor.h"
static const int kContinueWindowTimeoutMs = 10 * 60 * 1000;
namespace remoting {
// UIThreadProxy proxies DesktopEnvironment method calls to the UI
// thread. This is neccessary so that DesktopEnvironment can be
// deleted synchronously even while there are pending tasks on the
// message queue.
//
// TODO(sergeyu): Merge this code with remoting::TaskThreadProxy. The
// problem solved by this class is very simular to the one solved by
// ScopedRunnableMethodFactory. The main difference is that this class
// is thread-safe. Change the interface to make it look more like
// ScopedRunnableMethodFactory and rename it to avoid confusion with
// MessageLoopProxy.
class UIThreadProxy : public base::RefCountedThreadSafe<UIThreadProxy> {
public:
UIThreadProxy(base::MessageLoopProxy* message_loop)
: message_loop_(message_loop) {
}
// TODO(sergeyu): Rename this method.
void Detach() {
DCHECK(message_loop_->BelongsToCurrentThread());
message_loop_ = NULL;
}
void CallOnUIThread(const tracked_objects::Location& from_here,
const base::Closure& closure) {
scoped_refptr<base::MessageLoopProxy> message_loop = message_loop_;
if (message_loop) {
message_loop->PostTask(from_here, base::Bind(
&UIThreadProxy::CallClosure, this, closure));
}
}
void CallOnUIThreadDelayed(const tracked_objects::Location& from_here,
const base::Closure& closure,
int delay_ms) {
scoped_refptr<base::MessageLoopProxy> message_loop = message_loop_;
if (message_loop) {
message_loop->PostDelayedTask(from_here, base::Bind(
&UIThreadProxy::CallClosure, this, closure), delay_ms);
}
}
private:
friend class base::RefCountedThreadSafe<UIThreadProxy>;
virtual ~UIThreadProxy() { }
void CallClosure(const base::Closure& closure) {
if (message_loop_)
closure.Run();
}
scoped_refptr<base::MessageLoopProxy> message_loop_;
DISALLOW_COPY_AND_ASSIGN(UIThreadProxy);
};
// static
DesktopEnvironment* DesktopEnvironment::Create(ChromotingHostContext* context) {
Capturer* capturer = Capturer::Create();
EventExecutor* event_executor =
EventExecutor::Create(context->desktop_message_loop(), capturer);
Curtain* curtain = Curtain::Create();
DisconnectWindow* disconnect_window = DisconnectWindow::Create();
ContinueWindow* continue_window = ContinueWindow::Create();
LocalInputMonitor* local_input_monitor = LocalInputMonitor::Create();
return new DesktopEnvironment(context, capturer, event_executor, curtain,
disconnect_window, continue_window,
local_input_monitor);
}
DesktopEnvironment::DesktopEnvironment(ChromotingHostContext* context,
Capturer* capturer,
EventExecutor* event_executor,
Curtain* curtain,
DisconnectWindow* disconnect_window,
ContinueWindow* continue_window,
LocalInputMonitor* local_input_monitor)
: host_(NULL),
context_(context),
capturer_(capturer),
event_executor_(event_executor),
curtain_(curtain),
disconnect_window_(disconnect_window),
continue_window_(continue_window),
local_input_monitor_(local_input_monitor),
is_monitoring_local_inputs_(false),
continue_timer_started_(false),
proxy_(new UIThreadProxy(context->ui_message_loop())) {
}
DesktopEnvironment::~DesktopEnvironment() {
}
void DesktopEnvironment::Shutdown() {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
MonitorLocalInputs(false);
ShowDisconnectWindow(false, std::string());
ShowContinueWindow(false);
StartContinueWindowTimer(false);
proxy_->Detach();
}
void DesktopEnvironment::OnConnect(const std::string& username) {
proxy_->CallOnUIThread(FROM_HERE, base::Bind(
&DesktopEnvironment::ProcessOnConnect, base::Unretained(this), username));
}
void DesktopEnvironment::OnLastDisconnect() {
proxy_->CallOnUIThread(FROM_HERE, base::Bind(
&DesktopEnvironment::ProcessOnLastDisconnect, base::Unretained(this)));
}
void DesktopEnvironment::OnPause(bool pause) {
proxy_->CallOnUIThread(FROM_HERE, base::Bind(
&DesktopEnvironment::ProcessOnPause, base::Unretained(this), pause));
}
void DesktopEnvironment::ProcessOnConnect(const std::string& username) {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
MonitorLocalInputs(true);
ShowDisconnectWindow(true, username);
StartContinueWindowTimer(true);
}
void DesktopEnvironment::ProcessOnLastDisconnect() {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
MonitorLocalInputs(false);
ShowDisconnectWindow(false, std::string());
ShowContinueWindow(false);
StartContinueWindowTimer(false);
}
void DesktopEnvironment::ProcessOnPause(bool pause) {
StartContinueWindowTimer(!pause);
}
void DesktopEnvironment::MonitorLocalInputs(bool enable) {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
if (enable == is_monitoring_local_inputs_)
return;
if (enable) {
local_input_monitor_->Start(host_);
} else {
local_input_monitor_->Stop();
}
is_monitoring_local_inputs_ = enable;
}
void DesktopEnvironment::ShowDisconnectWindow(bool show,
const std::string& username) {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
if (show) {
disconnect_window_->Show(host_, username);
} else {
disconnect_window_->Hide();
}
}
void DesktopEnvironment::ShowContinueWindow(bool show) {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
if (show) {
continue_window_->Show(host_);
} else {
continue_window_->Hide();
}
}
void DesktopEnvironment::StartContinueWindowTimer(bool start) {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
if (start && !continue_timer_started_) {
continue_timer_target_time_ = base::Time::Now() +
base::TimeDelta::FromMilliseconds(kContinueWindowTimeoutMs);
proxy_->CallOnUIThreadDelayed(
FROM_HERE, base::Bind(&DesktopEnvironment::ContinueWindowTimerFunc,
base::Unretained(this)),
kContinueWindowTimeoutMs);
}
continue_timer_started_ = start;
}
void DesktopEnvironment::ContinueWindowTimerFunc() {
DCHECK(context_->ui_message_loop()->BelongsToCurrentThread());
// This function may be called prematurely if timer was stopped and
// then started again. In that case we just ignore this call.
if (continue_timer_target_time_ > base::Time::Now())
return;
continue_timer_started_ = false;
host_->PauseSession(true);
ShowContinueWindow(true);
}
} // namespace remoting
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