ash : Decouple power button controller and session state controller.

ash/wm/session_state_controller.cc

+// 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 "ash/wm/session_state_controller.h"
+
+#include "ash/ash_switches.h"
+#include "ash/shell.h"
+#include "ash/shell_delegate.h"
+#include "ash/shell_window_ids.h"
+#include "ash/wm/session_state_animator.h"
+#include "base/command_line.h"
+#include "ui/aura/root_window.h"
+#include "ui/aura/shared/compound_event_filter.h"
+
+#if defined(OS_CHROMEOS)
+#include "base/chromeos/chromeos_version.h"
+#endif
+
+
+namespace ash {
+
+SessionStateController::TestApi::TestApi(SessionStateController* controller)
+    : controller_(controller) {
+}
+
+SessionStateController::TestApi::~TestApi() {
+}
+
+SessionStateController::SessionStateController()
+    : login_status_(user::LOGGED_IN_NONE),
+      unlocked_login_status_(user::LOGGED_IN_NONE),
+      shutting_down_(false),
+      shutdown_after_lock_(false),
+      animator_(new internal::SessionStateAnimator()) {
+  Shell::GetPrimaryRootWindow()->AddRootWindowObserver(this);
+}
+
+SessionStateController::~SessionStateController() {
+  Shell::GetPrimaryRootWindow()->RemoveRootWindowObserver(this);
+}
+
+void SessionStateController::OnLoginStateChanged(user::LoginStatus status) {
+  login_status_ = status;
+  unlocked_login_status_ = user::LOGGED_IN_NONE;
+}
+
+void SessionStateController::OnAppTerminating() {
+  // If we hear that Chrome is exiting but didn't request it ourselves, all we
+  // can really hope for is that we'll have time to clear the screen.
+  if (!shutting_down_) {
+    shutting_down_ = true;
+    Shell* shell = ash::Shell::GetInstance();
+    shell->env_filter()->set_cursor_hidden_by_filter(false);
+    shell->cursor_manager()->ShowCursor(false);
+    animator_->ShowBlackLayer();
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::kAllContainersMask,
+        internal::SessionStateAnimator::ANIMATION_HIDE);
+  }
+}
+
+void SessionStateController::OnLockStateChanged(bool locked) {
+  if (shutting_down_ || (login_status_ == user::LOGGED_IN_LOCKED) == locked)
+    return;
+
+  if (!locked && login_status_ == user::LOGGED_IN_LOCKED) {
+    login_status_ = unlocked_login_status_;
+    unlocked_login_status_ = user::LOGGED_IN_NONE;
+  } else {
+    unlocked_login_status_ = login_status_;
+    login_status_ = user::LOGGED_IN_LOCKED;
+  }
+
+  if (locked) {
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
+        internal::SessionStateAnimator::ANIMATION_FADE_IN);
+    lock_timer_.Stop();
+    lock_fail_timer_.Stop();
+
+    if (shutdown_after_lock_) {
+      shutdown_after_lock_ = false;
+      StartLockToShutdownTimer();
+    }
+  } else {
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::DESKTOP_BACKGROUND |
+        internal::SessionStateAnimator::LAUNCHER |
+        internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+        internal::SessionStateAnimator::ANIMATION_RESTORE);
+    animator_->DropBlackLayer();
+  }
+}
+
+void SessionStateController::OnStartingLock() {
+  if (shutting_down_ || login_status_ == user::LOGGED_IN_LOCKED)
+    return;
+
+  // Ensure that the black layer is visible -- if the screen was locked via
+  // the wrench menu, we won't have already shown the black background
+  // as part of the slow-close animation.
+  animator_->ShowBlackLayer();
+
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::LAUNCHER,
+      internal::SessionStateAnimator::ANIMATION_HIDE);
+
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_FAST_CLOSE);
+
+  // Hide the screen locker containers so we can make them fade in later.
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_HIDE);
+}
+
+void SessionStateController::StartLockAnimationButLockImmediately() {
+  animator_->ShowBlackLayer();
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_SLOW_CLOSE);
+  OnLockTimeout();
+}
+
+void SessionStateController::ShutdownImmediately() {
+  animator_->ShowBlackLayer();
+  if (!shutting_down_)
+    RequestShutdownImpl();
+}
+
+void SessionStateController::StartCancellableLock() {
+  shutdown_after_lock_ = true;
+
+  animator_->ShowBlackLayer();
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_SLOW_CLOSE);
+  StartLockTimer();
+}
+
+void SessionStateController::StartCancellableShutdown() {
+  animator_->ShowBlackLayer();
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::kAllContainersMask,
+      internal::SessionStateAnimator::ANIMATION_SLOW_CLOSE);
+
+  StartPreShutdownAnimationTimer();
+}
+
+bool SessionStateController::IsEligibleForLock() {
+  return LoggedInAsNonGuest() && !IsLocked();
+}
+
+bool SessionStateController::IsLocked() {
+  return login_status_ == user::LOGGED_IN_LOCKED;
+}
+
+bool SessionStateController::IsTryingToLock() {
+  return lock_fail_timer_.IsRunning();
+}
+
+bool SessionStateController::IsLocking() {
+  return lock_timer_.IsRunning() || IsTryingToLock();
+}
+
+bool SessionStateController::IsShuttingDown() {
+  return shutting_down_;
+}
+
+bool SessionStateController::CanCancelLock() {
+  return lock_timer_.IsRunning();
+}
+
+void SessionStateController::CancelLock() {
+  if (!CanCancelLock())
+    return;
+  shutdown_after_lock_ = false;
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::kAllContainersMask,
+      internal::SessionStateAnimator::ANIMATION_UNDO_SLOW_CLOSE);
+  animator_->ScheduleDropBlackLayer();
+  lock_timer_.Stop();
+}
+
+void SessionStateController::CancelLockWithOtherAnimation() {
+  if (!CanCancelLock())
+    return;
+  shutdown_after_lock_ = false;
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_UNDO_SLOW_CLOSE);
+  animator_->ScheduleDropBlackLayer();
+  lock_timer_.Stop();
+}
+
+bool SessionStateController::CanCancelShutdown() {
+  return pre_shutdown_timer_.IsRunning() ||
+         lock_to_shutdown_timer_.IsRunning();
+}
+
+void SessionStateController::CancelShutdown() {
+  if (!CanCancelShutdown())
+    return;
+  if (lock_to_shutdown_timer_.IsRunning()) {
+    lock_to_shutdown_timer_.Stop();
+    return;
+  }
+
+  if (login_status_ == user::LOGGED_IN_LOCKED) {
+    // If we've already started shutdown transition at lock screen
+    // desktop background needs to be restored immediately.
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::DESKTOP_BACKGROUND,
+        internal::SessionStateAnimator::ANIMATION_RESTORE);
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::kAllLockScreenContainersMask,
+        internal::SessionStateAnimator::ANIMATION_UNDO_SLOW_CLOSE);
+    animator_->ScheduleDropBlackLayer();
+  } else {
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::kAllContainersMask,
+        internal::SessionStateAnimator::ANIMATION_UNDO_SLOW_CLOSE);
+    animator_->ScheduleDropBlackLayer();
+  }
+  pre_shutdown_timer_.Stop();
+}
+
+void SessionStateController::RequestShutdown() {
+  if (!shutting_down_)
+    RequestShutdownImpl();
+}
+
+
+void SessionStateController::RequestShutdownImpl() {
+  DCHECK(!shutting_down_);
+  shutting_down_ = true;
+
+  Shell* shell = ash::Shell::GetInstance();
+  shell->env_filter()->set_cursor_hidden_by_filter(false);
+  shell->cursor_manager()->ShowCursor(false);
+
+  animator_->ShowBlackLayer();
+  if (login_status_ != user::LOGGED_IN_NONE) {
+    // Hide the other containers before starting the animation.
+    // ANIMATION_FAST_CLOSE will make the screen locker windows partially
+    // transparent, and we don't want the other windows to show through.
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS |
+        internal::SessionStateAnimator::LAUNCHER,
+        internal::SessionStateAnimator::ANIMATION_HIDE);
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::kAllLockScreenContainersMask,
+        internal::SessionStateAnimator::ANIMATION_FAST_CLOSE);
+  } else {
+    animator_->StartAnimation(
+        internal::SessionStateAnimator::kAllContainersMask,
+        internal::SessionStateAnimator::ANIMATION_FAST_CLOSE);
+  }
+  StartRealShutdownTimer();
+}
+
+void SessionStateController::OnRootWindowHostCloseRequested(
+                                                const aura::RootWindow*) {
+  if(Shell::GetInstance() && Shell::GetInstance()->delegate())
+    Shell::GetInstance()->delegate()->Exit();
+}
+
+bool SessionStateController::LoggedInAsNonGuest() const {
+  if (login_status_ == user::LOGGED_IN_NONE)
+    return false;
+  if (login_status_ == user::LOGGED_IN_GUEST)
+    return false;
+  // TODO(mukai): think about kiosk mode.
+  return true;
+}
+
+// ----------- Timer stuff.
+
+void SessionStateController::StartLockTimer() {
+  lock_timer_.Stop();
+  lock_timer_.Start(FROM_HERE,
+                    base::TimeDelta::FromMilliseconds(
+                        internal::kSlowCloseAnimMs),
+                    this, &SessionStateController::OnLockTimeout);
+}
+
+void SessionStateController::OnLockTimeout() {
+  delegate_->RequestLockScreen();
+  lock_fail_timer_.Start(
+      FROM_HERE,
+      base::TimeDelta::FromMilliseconds(internal::kLockFailTimeoutMs),
+      this, &SessionStateController::OnLockFailTimeout);
+}
+
+void SessionStateController::OnLockFailTimeout() {
+  DCHECK_NE(login_status_, user::LOGGED_IN_LOCKED);
+  // Undo lock animation.
+  animator_->StartAnimation(
+      internal::SessionStateAnimator::LAUNCHER |
+      internal::SessionStateAnimator::NON_LOCK_SCREEN_CONTAINERS,
+      internal::SessionStateAnimator::ANIMATION_RESTORE);
+  animator_->DropBlackLayer();
+}
+
+void SessionStateController::StartLockToShutdownTimer() {
+  shutdown_after_lock_ = false;
+  lock_to_shutdown_timer_.Stop();
+  lock_to_shutdown_timer_.Start(
+      FROM_HERE,
+      base::TimeDelta::FromMilliseconds(internal::kLockToShutdownTimeoutMs),
+      this, &SessionStateController::OnLockToShutdownTimeout);
+}
+
+
+void SessionStateController::OnLockToShutdownTimeout() {
+  DCHECK_EQ(login_status_, user::LOGGED_IN_LOCKED);
+  StartCancellableShutdown();
+}
+
+void SessionStateController::StartPreShutdownAnimationTimer() {
+  pre_shutdown_timer_.Stop();
+  pre_shutdown_timer_.Start(
+      FROM_HERE,
+      base::TimeDelta::FromMilliseconds(internal::kShutdownTimeoutMs),
+      this, &SessionStateController::OnPreShutdownAnimationTimeout);
+}
+
+void SessionStateController::OnPreShutdownAnimationTimeout() {
+  if (!shutting_down_)
+    RequestShutdownImpl();
+}
+
+void SessionStateController::StartRealShutdownTimer() {
+  real_shutdown_timer_.Start(
+      FROM_HERE,
+      base::TimeDelta::FromMilliseconds(
+          internal::kFastCloseAnimMs + internal::kShutdownRequestDelayMs),
+      this, &SessionStateController::OnRealShutdownTimeout);
+}
+
+void SessionStateController::OnRealShutdownTimeout() {
+  DCHECK(shutting_down_);
+#if defined(OS_CHROMEOS)
+  if (!base::chromeos::IsRunningOnChromeOS()) {
+    ShellDelegate* delegate = Shell::GetInstance()->delegate();
+    if (delegate)
+      delegate->Exit();
+  }
+#endif
+  delegate_->RequestShutdown();
+}
+
+}  // namespace ash