[Chrome OS] Implement the device wallpaper policy.

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.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 CHROME_BROWSER_CHROMEOS_LOGIN_USERS_WALLPAPER_WALLPAPER_MANAGER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_WALLPAPER_WALLPAPER_MANAGER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "ash/public/interfaces/wallpaper.mojom.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/chromeos/customization/customization_wallpaper_downloader.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "components/user_manager/user.h"
 #include "components/user_manager/user_image/user_image.h"
 #include "components/user_manager/user_manager.h"
 #include "components/wallpaper/wallpaper_layout.h"
 #include "components/wallpaper/wallpaper_manager_base.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "ui/gfx/image/image_skia.h"
@@ skipping 48 matching lines @@
   void ScheduleSetUserWallpaper(const AccountId& account_id,
                                 bool delayed) override;
   void SetWallpaperFromImageSkia(const AccountId& account_id,
                                  const gfx::ImageSkia& image,
                                  wallpaper::WallpaperLayout layout,
                                  bool update_wallpaper) override;
   void UpdateWallpaper(bool clear_cache) override;
   size_t GetPendingListSizeForTesting() const override;
   wallpaper::WallpaperFilesId GetFilesId(
       const AccountId& account_id) const override;
+  bool SetDeviceWallpaperIfApplicable(const AccountId& account_id) override;
 
   // ash::mojom::WallpaperPicker:
   void Open() override;
 
   // content::NotificationObserver:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // user_manager::UserManager::UserSessionStateObserver:
@@ skipping 14 matching lines @@
 
   // This is called by PendingWallpaper when load is finished.
   void RemovePendingWallpaperFromList(PendingWallpaper* pending);
 
   // Set wallpaper to |user_image| controlled by policy.  (Takes a UserImage
   // because that's the callback interface provided by UserImageLoader.)
   void SetPolicyControlledWallpaper(
       const AccountId& account_id,
       std::unique_ptr<user_manager::UserImage> user_image);
 
+  // This is called when the device wallpaper policy changes.
+  void OnDeviceWallpaperPolicyChanged();
+  // This is call after checking if the device wallpaper exists.
+  void OnDeviceWallpaperExists(const AccountId& account_id,
+                               const std::string& url,
+                               const std::string& hash,
+                               bool exist);
+  // This is called after the device wallpaper is download (either successful or
+  // failed).
+  void OnDeviceWallpaperDownloaded(const AccountId& account_id,
+                                   const std::string& hash,
+                                   bool success,
+                                   const GURL& url);
+  // Check if the device wallpaper matches the hash that's provided in the
+  // device wallpaper policy setting.
+  void OnCheckDeviceWallpaperMatchHash(const AccountId& account_id,
+                                       const std::string& url,
+                                       const std::string& hash,
+                                       bool match);
+  // This is called when the device wallpaper is decoded successfully.
+  void OnDeviceWallpaperDecoded(
+      const AccountId& account_id,
+      std::unique_ptr<user_manager::UserImage> user_image);
+
   // wallpaper::WallpaperManagerBase:
   void InitializeRegisteredDeviceWallpaper() override;
   bool GetUserWallpaperInfo(const AccountId& account_id,
                             wallpaper::WallpaperInfo* info) const override;
+  // Returns true if the device wallpaper should be set for the account.
+  bool ShouldSetDeviceWallpaper(const AccountId& account_id,
+                                std::string* url,
+                                std::string* hash) override;
+  base::FilePath GetDeviceWallpaperDir() override;
+  base::FilePath GetDeviceWallpaperFilePath() override;
   void OnWallpaperDecoded(
       const AccountId& account_id,
       wallpaper::WallpaperLayout layout,
       bool update_wallpaper,
       wallpaper::MovableOnDestroyCallbackHolder on_finish,
       std::unique_ptr<user_manager::UserImage> user_image) override;
   void StartLoad(const AccountId& account_id,
                  const wallpaper::WallpaperInfo& info,
                  bool update_wallpaper,
                  const base::FilePath& wallpaper_path,
@@ skipping 26 matching lines @@
       const base::FilePath& customized_default_wallpaper_file_small,
       std::unique_ptr<gfx::ImageSkia> small_wallpaper_image,
       const base::FilePath& customized_default_wallpaper_file_large,
       std::unique_ptr<gfx::ImageSkia> large_wallpaper_image) override;
 
   mojo::Binding<ash::mojom::WallpaperPicker> binding_;
 
   std::unique_ptr<CrosSettings::ObserverSubscription>
       show_user_name_on_signin_subscription_;
 
+  std::unique_ptr<CrosSettings::ObserverSubscription>
+      device_wallpaper_image_subscription_;
+  std::unique_ptr<CustomizationWallpaperDownloader>
+      device_wallpaper_downloader_;
+  bool retry_download_if_failed_ = true;
+
   // Pointer to last inactive (waiting) entry of 'loading_' list.
   // NULL when there is no inactive request.
   PendingWallpaper* pending_inactive_;
 
   // Owns PendingWallpaper.
   // PendingWallpaper deletes itself from here on load complete.
   // All pending will be finally deleted on destroy.
   typedef std::vector<scoped_refptr<PendingWallpaper>> PendingList;
   PendingList loading_;
 
   content::NotificationRegistrar registrar_;
 
   base::WeakPtrFactory<WallpaperManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_WALLPAPER_WALLPAPER_MANAGER_H_