Wallpaper manager backend APIs

chrome/browser/chromeos/login/wallpaper_manager.h

 // Copyright (c) 2012 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_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_
 
 #include <string>
 
+#include "ash/desktop_background/desktop_background_resources.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/timer.h"
+#include "chrome/browser/chromeos/login/user_image.h"
+#include "chrome/browser/chromeos/login/user_image_loader.h"
 #include "chrome/browser/chromeos/power/resume_observer.h"
 #include "chrome/browser/chromeos/system/timezone_settings.h"
 #include "unicode/timezone.h"
 
 namespace chromeos {
 
 // This class maintains wallpapers for users who have logged into this Chrome
 // OS device.
 class WallpaperManager: public system::TimezoneSettings::Observer,
                         public chromeos::ResumeObserver {
  public:
   static WallpaperManager* Get();
 
   WallpaperManager();
 
   // Adds PowerManagerClient observer. It needs to be added after
   // PowerManagerClient initialized.
   void AddPowerManagerClientObserver();
 
   // Starts a one shot timer which calls BatchUpdateWallpaper at next midnight.
   // Cancel any previous timer if any.
   void RestartTimer();
 
   // Sets last selected user on user pod row.
   void SetLastSelectedUser(const std::string& last_selected_user);
 
+  // Sets wallpaper to the image file |path| points to.
+  void SetWallpaperFromFile(std::string email,
+                            const std::string& path,
+                            ash::WallpaperLayout layout);
+
   // User was deselected at login screen, reset wallpaper if needed.
   void UserDeselected();
 
  private:
   virtual ~WallpaperManager();
 
+  void OnCustomWallpaperLoaded(const std::string& email,
+                               ash::WallpaperLayout layout,
+                               const UserImage& user_image);
+
   // Change the wallpapers for users who choose DAILY wallpaper type. Updates
   // current wallpaper if it changed. This function should be called at exactly
   // at 0am if chromeos device is on.
   void BatchUpdateWallpaper();
 
+  // Loads user image from its file.
+  scoped_refptr<UserImageLoader> image_loader_;
+
   // Overridden from chromeos::ResumeObserver
   virtual void SystemResumed() OVERRIDE;
 
   // Overridden from system::TimezoneSettings::Observer.
   virtual void TimezoneChanged(const icu::TimeZone& timezone) OVERRIDE;
 
   // The last selected user on user pod row.
   std::string last_selected_user_;
 
   base::OneShotTimer<WallpaperManager> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WALLPAPER_MANAGER_H_