Athena: Adding basic resource management framework (un-/re-loading) of V2 applications

athena/content/app_activity_proxy.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_CONTENT_APP_ACTIVITY_PROXY_H_
+#define ATHENA_CONTENT_APP_ACTIVITY_PROXY_H_
+
+#include <vector>
+
+#include "athena/activity/public/activity.h"
+#include "athena/activity/public/activity_view_model.h"
+#include "athena/content/app_activity_proxy.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace athena {
+
+class AppActivityRegistry;
+
+// This activity object is a proxy placeholder for the application while it is
+// unloaded. When selected it will launch the applciation again and destroy
+// itself indirectly.
+class AppActivityProxy : public Activity,

[oshima, 2014/08/15 15:15:59]

This is for an unloaded app right?
This name sounds like a proxy for an AppActivity (which isn't exactly correct).
I think we need better name for this. (UnloadedActivity)?

[Mr4D (OOO till 08-26), 2014/08/18 16:09:32]

UnloadedActivity would be incorrect. If something like that it would need to be
named something like "UnloadedAppActivity" since WebActivities do not require
this special treatment.

But then again - it is not really an activity - it is only a placeholder for an
Activity which once was, like a proxy. As such I think that the current name is
fine?

+                         public ActivityViewModel {
+ public:
+  AppActivityProxy(ActivityViewModel* view_model, AppActivityRegistry* creator);
+  virtual ~AppActivityProxy();
+
+  // Activity overrides:
+  virtual ActivityViewModel* GetActivityViewModel() OVERRIDE;
+  virtual void SetCurrentState(ActivityState state) OVERRIDE;
+  virtual ActivityState GetCurrentState() OVERRIDE;
+  virtual bool IsVisible() OVERRIDE;
+  virtual ActivityMediaState GetMediaState() OVERRIDE;
+  virtual aura::Window* GetWindow() OVERRIDE;
+
+  // ActivityViewModel overrides:
+  virtual void Init() OVERRIDE;
+  virtual SkColor GetRepresentativeColor() const OVERRIDE;
+  virtual base::string16 GetTitle() const OVERRIDE;
+  virtual bool UsesFrame() const OVERRIDE;
+  virtual views::View* GetContentsView() OVERRIDE;
+  virtual void CreateOverviewModeImage() OVERRIDE;
+  virtual gfx::ImageSkia GetOverviewModeImage() OVERRIDE;
+
+ private:
+  // The creator of this object which needs to be informed if the object gets
+  // destroyed or the application should get restarted.
+  AppActivityRegistry* app_activity_registry_;
+
+  // The presentation values.
+  const base::string16 title_;
+  const gfx::ImageSkia image_;
+  const SkColor color_;
+
+  // The associated view.
+  views::View* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppActivityProxy);
+};
+
+}  // namespace athena
+
+#endif  // ATHENA_CONTENT_APP_ACTIVITY_PROXY_H_