// Copyright 2016 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 "ash/shell_port.h"

#include <utility>

#include "ash/public/cpp/shell_window_ids.h"
#include "ash/root_window_controller.h"
#include "ash/session/session_controller.h"
#include "ash/shell.h"
#include "ash/wm/root_window_finder.h"
#include "base/bind.h"
#include "base/logging.h"
#include "ui/aura/client/aura_constants.h"
#include "ui/aura/window.h"

namespace ash {

// static
ShellPort* ShellPort::instance_ = nullptr;

ShellPort::~ShellPort() {
  DCHECK_EQ(this, instance_);
  instance_ = nullptr;
}

// static
ShellPort* ShellPort::Get() {
  return instance_;
}

void ShellPort::Shutdown() {}

void ShellPort::ShowContextMenu(const gfx::Point& location_in_screen,
                                ui::MenuSourceType source_type) {
  // Bail with no active user session, in the lock screen, or in app/kiosk mode.
  if (Shell::Get()->session_controller()->NumberOfLoggedInUsers() < 1 ||
      Shell::Get()->session_controller()->IsScreenLocked() ||
      Shell::Get()->session_controller()->IsRunningInAppMode()) {
    return;
  }

  aura::Window* root = wm::GetRootWindowAt(location_in_screen);
  RootWindowController::ForWindow(root)->ShowContextMenu(location_in_screen,
                                                         source_type);
}

void ShellPort::OnLockStateEvent(LockStateObserver::EventType event) {
  for (auto& observer : lock_state_observers_)
    observer.OnLockStateEvent(event);
}

void ShellPort::AddLockStateObserver(LockStateObserver* observer) {
  lock_state_observers_.AddObserver(observer);
}

void ShellPort::RemoveLockStateObserver(LockStateObserver* observer) {
  lock_state_observers_.RemoveObserver(observer);
}

ShellPort::ShellPort() {
  DCHECK(!instance_);
  instance_ = this;
}

}  // namespace ash