Move mus to //services/ui

components/mus/ws/animation_runner.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 COMPONENTS_MUS_WS_ANIMATION_RUNNER_H_
-#define COMPONENTS_MUS_WS_ANIMATION_RUNNER_H_
-
-#include <algorithm>
-#include <map>
-#include <memory>
-#include <set>
-#include <unordered_map>
-#include <vector>
-
-#include "base/observer_list.h"
-#include "base/time/time.h"
-
-namespace mus {
-namespace mojom {
-class AnimationGroup;
-}
-
-namespace ws {
-
-class AnimationRunnerObserver;
-class ScheduledAnimationGroup;
-class ServerWindow;
-
-// AnimationRunner is responsible for maintaining and running a set of
-// animations. The animations are represented as a set of AnimationGroups. New
-// animations are scheduled by way of Schedule(). A |window| may only have one
-// animation running at a time. Schedule()ing a new animation for a window
-// already animating implicitly cancels the current animation for the window.
-// Animations progress by way of the Tick() function.
-class AnimationRunner {
- public:
-  using AnimationId = uint32_t;
-  using WindowAndAnimationPair =
-      std::pair<ServerWindow*, const mojom::AnimationGroup*>;
-
-  explicit AnimationRunner(base::TimeTicks now);
-  ~AnimationRunner();
-
-  void AddObserver(AnimationRunnerObserver* observer);
-  void RemoveObserver(AnimationRunnerObserver* observer);
-
-  // Schedules animations. If any of the groups are not valid no animations are
-  // scheuled and 0 is returned. If there is an existing animation in progress
-  // for any of the windows it is canceled and any properties that were
-  // animating but are no longer animating are set to their target value.
-  AnimationId Schedule(const std::vector<WindowAndAnimationPair>& groups,
-                       base::TimeTicks now);
-
-  // Cancels an animation scheduled by an id that was previously returned from
-  // Schedule().
-  void CancelAnimation(AnimationId id);
-
-  // Cancels the animation scheduled for |window|. Does nothing if there is no
-  // animation scheduled for |window|. This does not change |window|. That is,
-  // any in progress animations are stopped.
-  void CancelAnimationForWindow(ServerWindow* window);
-
-  // Advance the animations updating values appropriately.
-  void Tick(base::TimeTicks time);
-
-  // Returns true if there are animations currently scheduled.
-  bool HasAnimations() const { return !window_to_animation_map_.empty(); }
-
-  // Returns true if the animation identified by |id| is valid and animating.
-  bool IsAnimating(AnimationId id) const {
-    return id_to_windows_map_.count(id) > 0;
-  }
-
-  // Returns the windows that are currently animating for |id|. Returns an empty
-  // set if |id| does not identify a valid animation.
-  std::set<ServerWindow*> GetWindowsAnimating(AnimationId id) {
-    return IsAnimating(id) ? id_to_windows_map_.find(id)->second
-                           : std::set<ServerWindow*>();
-  }
-
- private:
-  enum CancelSource {
-    // Cancel is the result of scheduling another animation for the window.
-    CANCEL_SOURCE_SCHEDULE,
-
-    // Cancel originates from an explicit call to cancel.
-    CANCEL_SOURCE_CANCEL,
-  };
-
-  using WindowToAnimationMap =
-      std::unordered_map<ServerWindow*,
-                         std::unique_ptr<ScheduledAnimationGroup>>;
-  using IdToWindowsMap = std::map<AnimationId, std::set<ServerWindow*>>;
-
-  void CancelAnimationForWindowImpl(ServerWindow* window, CancelSource source);
-
-  // Removes |window| from both |window_to_animation_map_| and
-  // |id_to_windows_map_|.
-  // Returns true if there are no more windows animating with the animation id
-  // the window is associated with.
-  bool RemoveWindowFromMaps(ServerWindow* window);
-
-  AnimationId next_id_;
-
-  base::TimeTicks last_tick_time_;
-
-  base::ObserverList<AnimationRunnerObserver> observers_;
-
-  WindowToAnimationMap window_to_animation_map_;
-
-  IdToWindowsMap id_to_windows_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(AnimationRunner);
-};
-
-}  // namespace ws
-}  // namespace mus
-
-#endif  // COMPONENTS_MUS_WS_ANIMATION_RUNNER_H_