Revert of Improving the user transition to add special cases for maximized windows and make the transition "m…

chrome/browser/ui/ash/multi_user/user_switch_animator_chromeos.h

-// Copyright 2014 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.
-
-#ifndef CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_
-#define CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_
-
-#include <string>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/timer/timer.h"
-
-namespace aura {
-class Window;
-}  // namespace aura
-
-namespace chrome {
-
-class MultiUserWindowManagerChromeOS;
-
-// A class which performs transitions animations between users. Upon creation,
-// the animation gets started and upon destruction the animation gets finished
-// if not done yet.
-// Specifying |animation_disabled| upon creation will perform the transition
-// without visible animations.
-class UserSwichAnimatorChromeOS {
- public:
-  // The animation step for the user change animation.
-  enum AnimationStep {
-    ANIMATION_STEP_HIDE_OLD_USER,  // Hiding the old user (and shelf).
-    ANIMATION_STEP_SHOW_NEW_USER,  // Show the shelf of the new user.
-    ANIMATION_STEP_FINALIZE,       // All animations are done - final cleanup.
-    ANIMATION_STEP_ENDED           // The animation has ended.
-  };
-
-  UserSwichAnimatorChromeOS(MultiUserWindowManagerChromeOS* owner,
-                            const std::string& new_user_id,
-                            bool animation_disabled);
-  ~UserSwichAnimatorChromeOS();
-
-  // Check if a window is covering the entire work area of the screen it is on.
-  static bool CoversScreen(aura::Window* window);
-
-  bool IsAnimationFinished() {
-    return animation_step_ == ANIMATION_STEP_ENDED;
-  }
-
-  // Returns the user id for which the wallpaper is currently shown.
-  // If a wallpaper is transitioning to B it will be returned as "->B".
-  const std::string& wallpaper_user_id_for_test() { return wallpaper_user_id_; }
-
-  // Advances the user switch animation to the next step. It reads the current
-  // step from |animation_step_| and increments it thereafter. When
-  // |ANIMATION_STEP_FINALIZE| gets executed, the animation is finished and the
-  // timer (if one exists) will get destroyed.
-  void AdvanceUserTransitionAnimation();
-
- private:
-  // The window configuration of screen covering windows before an animation.
-  enum TransitioningScreenCover {
-    NO_USER_COVERS_SCREEN,   // No window covers the entire screen.
-    OLD_USER_COVERS_SCREEN,  // The current user has at least one window
-                             // covering the entire screen.
-    NEW_USER_COVERS_SCREEN,  // The user which becomes active has at least one
-                             // window covering the entire screen.
-    BOTH_USERS_COVER_SCREEN  // Both users have at least one window each
-                             // covering the entire screen.
-  };
-
-  // Finalizes the animation and ends the timer (if there is one).
-  void FinalizeAnimation();
-
-  // Execute the user wallpaper animations for |animation_step|.
-  void TransitionWallpaper(AnimationStep animtion_step);
-
-  // Execute the user shelf animations for |animation_step|.
-  void TransitionUserShelf(AnimationStep animtion_step);
-
-  // Execute the window animations for |animation_step|.
-  void TransitionWindows(AnimationStep animation_step);
-
-  // Check if a window is maximized / fullscreen / covering the entire screen.
-  // TODO(skuhne): We might want to do this on a per screen basis.
-  TransitioningScreenCover GetScreenCover();
-
-  // The owning window manager.
-  MultiUserWindowManagerChromeOS* owner_;
-
-  // The new user to set.
-  std::string new_user_id_;
-
-  // If true, all animations will be suppressed.
-  bool animation_disabled_;
-
-  // The next animation step for AdvanceUserTransitionAnimation().
-  AnimationStep animation_step_;
-
-  // The screen cover status before the animation has started.
-  TransitioningScreenCover screen_cover_;
-
-  // A timer which watches to executes the second part of a "user changed"
-  // animation. Note that this timer exists only during such an animation.
-  scoped_ptr<base::Timer> user_changed_animation_timer_;
-
-  // For unit tests: Check which wallpaper was set.
-  std::string wallpaper_user_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserSwichAnimatorChromeOS);
-};
-
-}  // namespace chrome
-
-#endif  // CHROME_BROWSER_UI_ASH_MULTI_USER_USER_SWITCH_ANIMATOR_CHROMEOS_H_