// Copyright (c) 2012 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/basic_desktop_environment.h"

#include "base/bind.h"
#include "base/logging.h"
#include "base/single_thread_task_runner.h"
#include "remoting/host/audio_capturer.h"
#if defined(OS_CHROMEOS)
#include "remoting/host/chromeos/aura_desktop_capturer.h"
#include "remoting/host/chromeos/mouse_cursor_monitor_aura.h"
#endif
#include "remoting/host/client_session_control.h"
#include "remoting/host/gnubby_auth_handler.h"
#include "remoting/host/input_injector.h"
#include "remoting/host/screen_controls.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
#include "third_party/webrtc/modules/desktop_capture/mouse_cursor_monitor.h"
#include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"

namespace remoting {

BasicDesktopEnvironment::~BasicDesktopEnvironment() {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());
}

scoped_ptr<AudioCapturer> BasicDesktopEnvironment::CreateAudioCapturer() {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());

  return AudioCapturer::Create();
}

scoped_ptr<InputInjector> BasicDesktopEnvironment::CreateInputInjector() {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());

  return InputInjector::Create(input_task_runner(), ui_task_runner());
}

scoped_ptr<ScreenControls> BasicDesktopEnvironment::CreateScreenControls() {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());

  return nullptr;
}

scoped_ptr<webrtc::MouseCursorMonitor>
BasicDesktopEnvironment::CreateMouseCursorMonitor() {
#if defined(OS_CHROMEOS)
  return make_scoped_ptr(new MouseCursorMonitorAura());
#else
  return make_scoped_ptr(webrtc::MouseCursorMonitor::CreateForScreen(
      *desktop_capture_options_, webrtc::kFullDesktopScreenId));
#endif
}

std::string BasicDesktopEnvironment::GetCapabilities() const {
  return std::string();
}

void BasicDesktopEnvironment::SetCapabilities(const std::string& capabilities) {
}

scoped_ptr<GnubbyAuthHandler> BasicDesktopEnvironment::CreateGnubbyAuthHandler(
    protocol::ClientStub* client_stub) {
  return nullptr;
}

scoped_ptr<webrtc::DesktopCapturer>
BasicDesktopEnvironment::CreateVideoCapturer() {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());

#if defined(OS_CHROMEOS)
  return scoped_ptr<webrtc::DesktopCapturer>(new AuraDesktopCapturer());
#else  // !defined(OS_CHROMEOS)
  // The basic desktop environment does not use X DAMAGE, since it is
  // broken on many systems - see http://crbug.com/73423.
  return make_scoped_ptr(
      webrtc::ScreenCapturer::Create(*desktop_capture_options_));
#endif  // !defined(OS_CHROMEOS)
}

BasicDesktopEnvironment::BasicDesktopEnvironment(
    scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
    scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
    : caller_task_runner_(caller_task_runner),
      input_task_runner_(input_task_runner),
      ui_task_runner_(ui_task_runner),
      desktop_capture_options_(
          new webrtc::DesktopCaptureOptions(
              webrtc::DesktopCaptureOptions::CreateDefault())) {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());
}

BasicDesktopEnvironmentFactory::BasicDesktopEnvironmentFactory(
    scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
    scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
    : caller_task_runner_(caller_task_runner),
      input_task_runner_(input_task_runner),
      ui_task_runner_(ui_task_runner) {
}

BasicDesktopEnvironmentFactory::~BasicDesktopEnvironmentFactory() {
}

bool BasicDesktopEnvironmentFactory::SupportsAudioCapture() const {
  DCHECK(caller_task_runner_->BelongsToCurrentThread());

  return AudioCapturer::IsSupported();
}

}  // namespace remoting