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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef EXTENSIONS_SHELL_BROWSER_DESKTOP_CONTROLLER_H_
      6 #define EXTENSIONS_SHELL_BROWSER_DESKTOP_CONTROLLER_H_
      7 
      8 namespace aura {
      9 class Window;
     10 class WindowTreeHost;
     11 }
     12 
     13 namespace content {
     14 class BrowserContext;
     15 }
     16 
     17 namespace extensions {
     18 class AppWindow;
     19 class Extension;
     20 class ShellAppWindow;
     21 
     22 // DesktopController is an interface to construct the window environment in
     23 // extensions shell. ShellDesktopController provides a default implementation
     24 // for app_shell, and embedder (such as athena) can provide its own.
     25 // TODO(jamescook|oshima): Clean up this interface now that there is only one
     26 // way to create an app window.
     27 class DesktopController {
     28  public:
     29   DesktopController();
     30   virtual ~DesktopController();
     31 
     32   // Returns the single instance of the desktop. (Stateless functions like
     33   // ShellAppWindowCreateFunction need to be able to access the desktop, so
     34   // we need a singleton somewhere).
     35   static DesktopController* instance();
     36 
     37   // Returns the WindowTreeHost created by this DesktopController.
     38   virtual aura::WindowTreeHost* GetHost() = 0;
     39 
     40   // Creates a new app window and adds it to the desktop. The desktop maintains
     41   // ownership of the window. The window must be closed before |extension| is
     42   // destroyed.
     43   virtual AppWindow* CreateAppWindow(content::BrowserContext* context,
     44                                      const Extension* extension) = 0;
     45 
     46   // Attaches the window to our window hierarchy.
     47   virtual void AddAppWindow(aura::Window* window) = 0;
     48 
     49   // Closes and destroys the app windows.
     50   virtual void CloseAppWindows() = 0;
     51 };
     52 
     53 }  // namespace extensions
     54 
     55 #endif  // EXTENSIONS_SHELL_BROWSER_DESKTOP_CONTROLLER_H_
     56