Delete athena/

athena/activity/public/activity.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 ATHENA_ACTIVITY_PUBLIC_ACTIVITY_H_
-#define ATHENA_ACTIVITY_PUBLIC_ACTIVITY_H_
-
-#include <string>
-
-#include "athena/athena_export.h"
-
-namespace aura {
-class Window;
-}
-
-namespace content {
-class WebContents;
-}
-
-namespace athena {
-
-class ActivityViewModel;
-
-// This class is a high level abstraction of an activity (which could be either
-// a web page or a V1/V2 app/extension). Through this class the activity can
-// be controlled (e.g. loaded / unloaded).
-// An Activity gets created with state |ACTIVITY_UNLOADED|.
-// Requesting |ACTIVITY_VISIBLE| or |ACTIVITY_INVISIBLE| will load it.
-// Once an activity was |ACTIVITY_INVISIBLE| for a while it can be transitioned
-// into |ACTIVITY_BACKGROUND_LOW_PRIORITY| to surrender more resources. After
-// more time it can be transitions to |ACTIVITY_PERSISTENT| in which it only
-// has it's runtime state left. At any time it can be transitioned back to one
-// of the higher levels or unloaded via |ACTIVITY_UNLOADED|.
-// Note that the resource manager will also query the media state before
-// deciding if an activity can put into a lower state then |ACTIVITY_INVISIBLE|.
-class ATHENA_EXPORT Activity {
- public:
-  // The state of an activity which could either be set or requested by e.g. the
-  // resource management system.
-  enum ActivityState {
-    // The activity is allowed to have gpu compositor layers and can be visible.
-    ACTIVITY_VISIBLE,
-    // The activity does not have gpu compositing layers, will not be visible
-    // and will be treated as a background priority task.
-    // By transitioning from VISIBLE to INVISIBLE, a screen shot of the current
-    // web content will be taken and replaces the "active content".
-    ACTIVITY_INVISIBLE,
-    // The activity should surrender additional resources. This has only an
-    // effect when the activity is in a loaded state (Visible, Active, Hidden).
-    ACTIVITY_BACKGROUND_LOW_PRIORITY,
-    // The activity will only keep a minimum set of resources to get back to the
-    // running state. It will get stalled however. Note that it is not possible
-    // to get into this state from the |ACTIVITY_UNLOADED| state.
-    ACTIVITY_PERSISTENT,
-    // Unloads the activity and can be called in any state - but unloaded.
-    ACTIVITY_UNLOADED
-  };
-
-  // This enum declares the media state the activity is in.
-  // TODO(skuhne): Move the |TabMediaState| out of chrome and combine it in a
-  // media library within content and then use that enum instead.
-  enum ActivityMediaState {
-    ACTIVITY_MEDIA_STATE_NONE,
-    ACTIVITY_MEDIA_STATE_RECORDING,  // Audio/Video being recorded by activity.
-    ACTIVITY_MEDIA_STATE_CAPTURING,  // Activity is being captured.
-    ACTIVITY_MEDIA_STATE_AUDIO_PLAYING  // Audible audio is playing in activity.
-  };
-
-  // Shows and activates an activity.
-  static void Show(Activity* activity);
-
-  // Deletes an activity.
-  static void Delete(Activity* activity);
-
-  // The Activity retains ownership of the returned view-model.
-  virtual ActivityViewModel* GetActivityViewModel() = 0;
-
-  // Transition the activity into a new state.
-  virtual void SetCurrentState(ActivityState state) = 0;
-
-  // Returns the current state of the activity.
-  virtual ActivityState GetCurrentState() = 0;
-
-  // Returns if the activity is visible or not.
-  virtual bool IsVisible() = 0;
-
-  // Returns the current media state.
-  virtual ActivityMediaState GetMediaState() = 0;
-
-  // Returns the window for the activity. This can be used to determine the
-  // stacking order of this activity against others.
-  // TODO(oshima): Consider returning base::Window window instead,
-  // which has Show/ShowInactive and other control methods.
-  virtual aura::Window* GetWindow() = 0;
-
-  // Returns the web contents used to draw the content of the activity.
-  // This may return nullptr if the web content is not available.
-  virtual content::WebContents* GetWebContents() = 0;
-
- protected:
-  virtual ~Activity() {}
-};
-
-}  // namespace athena
-
-#endif  // ATHENA_ACTIVITY_PUBLIC_ACTIVITY_H_