src/chrome/browser/chromeos/extensions/wallpaper_private_api.cc

   1 // Copyright (c) 2013 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 #include "chrome/browser/chromeos/extensions/wallpaper_private_api.h"
   6
   7 #include <vector>
   8
   9 #include "ash/ash_switches.h"
  10 #include "ash/desktop_background/desktop_background_controller.h"
  11 #include "ash/shell.h"
  12 #include "ash/wm/mru_window_tracker.h"
  13 #include "ash/wm/window_state.h"
  14 #include "ash/wm/window_util.h"
  15 #include "base/command_line.h"
  16 #include "base/file_util.h"
  17 #include "base/files/file_enumerator.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/path_service.h"
  20 #include "base/prefs/pref_service.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/stringprintf.h"
  23 #include "base/threading/worker_pool.h"
  24 #include "chrome/browser/browser_process.h"
  25 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
  26 #include "chrome/browser/profiles/profile.h"
  27 #include "chrome/common/chrome_paths.h"
  28 #include "chrome/common/pref_names.h"
  29 #include "chrome/grit/generated_resources.h"
  30 #include "chrome/grit/platform_locale_settings.h"
  31 #include "components/user_manager/user.h"
  32 #include "components/user_manager/user_manager.h"
  33 #include "content/public/browser/browser_thread.h"
  34 #include "extensions/browser/event_router.h"
  35 #include "ui/base/l10n/l10n_util.h"
  36 #include "ui/base/webui/web_ui_util.h"
  37 #include "ui/strings/grit/app_locale_settings.h"
  38 #include "url/gurl.h"
  39
  40 using base::BinaryValue;
  41 using content::BrowserThread;
  42 namespace wallpaper_private = extensions::api::wallpaper_private;
  43 namespace set_wallpaper_if_exists = wallpaper_private::SetWallpaperIfExists;
  44 namespace set_wallpaper = wallpaper_private::SetWallpaper;
  45 namespace set_custom_wallpaper = wallpaper_private::SetCustomWallpaper;
  46 namespace set_custom_wallpaper_layout =
  47     wallpaper_private::SetCustomWallpaperLayout;
  48 namespace get_thumbnail = wallpaper_private::GetThumbnail;
  49 namespace save_thumbnail = wallpaper_private::SaveThumbnail;
  50 namespace get_offline_wallpaper_list =
  51     wallpaper_private::GetOfflineWallpaperList;
  52
  53 namespace {
  54
  55 #if defined(GOOGLE_CHROME_BUILD)
  56 const char kWallpaperManifestBaseURL[] =
  57     "https://storage.googleapis.com/chromeos-wallpaper-public/manifest_";
  58 #endif
  59
  60 bool IsOEMDefaultWallpaper() {
  61   return CommandLine::ForCurrentProcess()->HasSwitch(
  62       ash::switches::kAshDefaultWallpaperIsOem);
  63 }
  64
  65 // Saves |data| as |file_name| to directory with |key|. Return false if the
  66 // directory can not be found/created or failed to write file.
  67 bool SaveData(int key, const std::string& file_name, const std::string& data) {
  68   base::FilePath data_dir;
  69   CHECK(PathService::Get(key, &data_dir));
  70   if (!base::DirectoryExists(data_dir) &&
  71       !base::CreateDirectory(data_dir)) {
  72     return false;
  73   }
  74   base::FilePath file_path = data_dir.Append(file_name);
  75
  76   return base::PathExists(file_path) ||
  77          (base::WriteFile(file_path, data.c_str(), data.size()) != -1);
  78 }
  79
  80 // Gets |file_name| from directory with |key|. Return false if the directory can
  81 // not be found or failed to read file to string |data|. Note if the |file_name|
  82 // can not be found in the directory, return true with empty |data|. It is
  83 // expected that we may try to access file which did not saved yet.
  84 bool GetData(const base::FilePath& path, std::string* data) {
  85   base::FilePath data_dir = path.DirName();
  86   if (!base::DirectoryExists(data_dir) &&
  87       !base::CreateDirectory(data_dir))
  88     return false;
  89
  90   return !base::PathExists(path) ||
  91          base::ReadFileToString(path, data);
  92 }
  93
  94 // WindowStateManager remembers which windows have been minimized in order to
  95 // restore them when the wallpaper viewer is hidden.
  96 class WindowStateManager : public aura::WindowObserver {
  97  public:
  98   typedef std::map<std::string, std::set<aura::Window*> >
  99       UserIDHashWindowListMap;
 100
 101   // Minimizes all windows except the active window.
 102   static void MinimizeInactiveWindows(const std::string& user_id_hash);
 103
 104   // Unminimizes all minimized windows restoring them to their previous state.
 105   // This should only be called after calling MinimizeInactiveWindows.
 106   static void RestoreWindows(const std::string& user_id_hash);
 107
 108  private:
 109   WindowStateManager();
 110
 111   virtual ~WindowStateManager();
 112
 113   // Store all unminimized windows except |active_window| and minimize them.
 114   // All the windows are saved in a map and the key value is |user_id_hash|.
 115   void BuildWindowListAndMinimizeInactiveForUser(
 116       const std::string& user_id_hash, aura::Window* active_window);
 117
 118   // Unminimize all the stored windows for |user_id_hash|.
 119   void RestoreMinimizedWindows(const std::string& user_id_hash);
 120
 121   // Remove the observer from |window| if |window| is no longer referenced in
 122   // user_id_hash_window_list_map_.
 123   void RemoveObserverIfUnreferenced(aura::Window* window);
 124
 125   // aura::WindowObserver overrides.
 126   virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
 127
 128   // Map of user id hash and associated list of minimized windows.
 129   UserIDHashWindowListMap user_id_hash_window_list_map_;
 130
 131   DISALLOW_COPY_AND_ASSIGN(WindowStateManager);
 132 };
 133
 134 // static
 135 WindowStateManager* g_window_state_manager = NULL;
 136
 137 // static
 138 void WindowStateManager::MinimizeInactiveWindows(
 139     const std::string& user_id_hash) {
 140   if (!g_window_state_manager)
 141     g_window_state_manager = new WindowStateManager();
 142   g_window_state_manager->BuildWindowListAndMinimizeInactiveForUser(
 143       user_id_hash, ash::wm::GetActiveWindow());
 144 }
 145
 146 // static
 147 void WindowStateManager::RestoreWindows(const std::string& user_id_hash) {
 148   if (!g_window_state_manager) {
 149     DCHECK(false) << "This should only be called after calling "
 150                   << "MinimizeInactiveWindows.";
 151     return;
 152   }
 153
 154   g_window_state_manager->RestoreMinimizedWindows(user_id_hash);
 155   if (g_window_state_manager->user_id_hash_window_list_map_.empty()) {
 156     delete g_window_state_manager;
 157     g_window_state_manager = NULL;
 158   }
 159 }
 160
 161 WindowStateManager::WindowStateManager() {}
 162
 163 WindowStateManager::~WindowStateManager() {}
 164
 165 void WindowStateManager::BuildWindowListAndMinimizeInactiveForUser(
 166     const std::string& user_id_hash, aura::Window* active_window) {
 167   if (user_id_hash_window_list_map_.find(user_id_hash) ==
 168       user_id_hash_window_list_map_.end()) {
 169     user_id_hash_window_list_map_[user_id_hash] = std::set<aura::Window*>();
 170   }
 171   std::set<aura::Window*>* results =
 172       &user_id_hash_window_list_map_[user_id_hash];
 173
 174   std::vector<aura::Window*> windows =
 175       ash::MruWindowTracker::BuildWindowList(false);
 176
 177   for (std::vector<aura::Window*>::iterator iter = windows.begin();
 178        iter != windows.end(); ++iter) {
 179     // Ignore active window and minimized windows.
 180     if (*iter == active_window || ash::wm::GetWindowState(*iter)->IsMinimized())
 181       continue;
 182
 183     // TODO(bshe): Add WindowStateObserver too. http://crbug.com/323252
 184     if (!(*iter)->HasObserver(this))
 185       (*iter)->AddObserver(this);
 186
 187     results->insert(*iter);
 188     ash::wm::GetWindowState(*iter)->Minimize();
 189   }
 190 }
 191
 192 void WindowStateManager::RestoreMinimizedWindows(
 193     const std::string& user_id_hash) {
 194   UserIDHashWindowListMap::iterator it =
 195       user_id_hash_window_list_map_.find(user_id_hash);
 196   if (it == user_id_hash_window_list_map_.end()) {
 197     DCHECK(false) << "This should only be called after calling "
 198                   << "MinimizeInactiveWindows.";
 199     return;
 200   }
 201
 202   std::set<aura::Window*> removed_windows;
 203   removed_windows.swap(it->second);
 204   user_id_hash_window_list_map_.erase(it);
 205
 206   for (std::set<aura::Window*>::iterator iter = removed_windows.begin();
 207        iter != removed_windows.end(); ++iter) {
 208     ash::wm::GetWindowState(*iter)->Unminimize();
 209     RemoveObserverIfUnreferenced(*iter);
 210   }
 211 }
 212
 213 void WindowStateManager::RemoveObserverIfUnreferenced(aura::Window* window) {
 214   for (UserIDHashWindowListMap::iterator iter =
 215            user_id_hash_window_list_map_.begin();
 216        iter != user_id_hash_window_list_map_.end();
 217        ++iter) {
 218     if (iter->second.find(window) != iter->second.end())
 219       return;
 220   }
 221   // Remove observer if |window| is not observed by any users.
 222   window->RemoveObserver(this);
 223 }
 224
 225 void WindowStateManager::OnWindowDestroyed(aura::Window* window) {
 226   for (UserIDHashWindowListMap::iterator iter =
 227            user_id_hash_window_list_map_.begin();
 228        iter != user_id_hash_window_list_map_.end();
 229        ++iter) {
 230     iter->second.erase(window);
 231   }
 232 }
 233
 234 }  // namespace
 235
 236 bool WallpaperPrivateGetStringsFunction::RunSync() {
 237   base::DictionaryValue* dict = new base::DictionaryValue();
 238   SetResult(dict);
 239
 240 #define SET_STRING(id, idr) \
 241   dict->SetString(id, l10n_util::GetStringUTF16(idr))
 242   SET_STRING("webFontFamily", IDS_WEB_FONT_FAMILY);
 243   SET_STRING("webFontSize", IDS_WEB_FONT_SIZE);
 244   SET_STRING("allCategoryLabel", IDS_WALLPAPER_MANAGER_ALL_CATEGORY_LABEL);
 245   SET_STRING("deleteCommandLabel", IDS_WALLPAPER_MANAGER_DELETE_COMMAND_LABEL);
 246   SET_STRING("customCategoryLabel",
 247              IDS_WALLPAPER_MANAGER_CUSTOM_CATEGORY_LABEL);
 248   SET_STRING("selectCustomLabel",
 249              IDS_WALLPAPER_MANAGER_SELECT_CUSTOM_LABEL);
 250   SET_STRING("positionLabel", IDS_WALLPAPER_MANAGER_POSITION_LABEL);
 251   SET_STRING("colorLabel", IDS_WALLPAPER_MANAGER_COLOR_LABEL);
 252   SET_STRING("centerCroppedLayout",
 253              IDS_OPTIONS_WALLPAPER_CENTER_CROPPED_LAYOUT);
 254   SET_STRING("centerLayout", IDS_OPTIONS_WALLPAPER_CENTER_LAYOUT);
 255   SET_STRING("stretchLayout", IDS_OPTIONS_WALLPAPER_STRETCH_LAYOUT);
 256   SET_STRING("connectionFailed", IDS_WALLPAPER_MANAGER_ACCESS_FAIL);
 257   SET_STRING("downloadFailed", IDS_WALLPAPER_MANAGER_DOWNLOAD_FAIL);
 258   SET_STRING("downloadCanceled", IDS_WALLPAPER_MANAGER_DOWNLOAD_CANCEL);
 259   SET_STRING("customWallpaperWarning",
 260              IDS_WALLPAPER_MANAGER_SHOW_CUSTOM_WALLPAPER_ON_START_WARNING);
 261   SET_STRING("accessFileFailure", IDS_WALLPAPER_MANAGER_ACCESS_FILE_FAILURE);
 262   SET_STRING("invalidWallpaper", IDS_WALLPAPER_MANAGER_INVALID_WALLPAPER);
 263   SET_STRING("surpriseMeLabel", IDS_WALLPAPER_MANAGER_SURPRISE_ME_LABEL);
 264   SET_STRING("learnMore", IDS_LEARN_MORE);
 265   SET_STRING("currentWallpaperSetByMessage",
 266              IDS_CURRENT_WALLPAPER_SET_BY_MESSAGE);
 267 #undef SET_STRING
 268
 269   webui::SetFontAndTextDirection(dict);
 270
 271   chromeos::WallpaperManager* wallpaper_manager =
 272       chromeos::WallpaperManager::Get();
 273   chromeos::WallpaperInfo info;
 274
 275   if (wallpaper_manager->GetLoggedInUserWallpaperInfo(&info))
 276     dict->SetString("currentWallpaper", info.location);
 277
 278 #if defined(GOOGLE_CHROME_BUILD)
 279   dict->SetString("manifestBaseURL", kWallpaperManifestBaseURL);
 280 #endif
 281
 282   Profile* profile = Profile::FromBrowserContext(browser_context());
 283   std::string app_name(
 284       profile->GetPrefs()->GetString(prefs::kCurrentWallpaperAppName));
 285   if (!app_name.empty())
 286     dict->SetString("wallpaperAppName", app_name);
 287
 288   dict->SetBoolean("isOEMDefaultWallpaper", IsOEMDefaultWallpaper());
 289   dict->SetString("canceledWallpaper",
 290                   wallpaper_api_util::kCancelWallpaperMessage);
 291   return true;
 292 }
 293
 294 WallpaperPrivateSetWallpaperIfExistsFunction::
 295     WallpaperPrivateSetWallpaperIfExistsFunction() {}
 296
 297 WallpaperPrivateSetWallpaperIfExistsFunction::
 298     ~WallpaperPrivateSetWallpaperIfExistsFunction() {}
 299
 300 bool WallpaperPrivateSetWallpaperIfExistsFunction::RunAsync() {
 301   params = set_wallpaper_if_exists::Params::Create(*args_);
 302   EXTENSION_FUNCTION_VALIDATE(params);
 303
 304   user_id_ = user_manager::UserManager::Get()->GetActiveUser()->email();
 305
 306   base::FilePath wallpaper_path;
 307   base::FilePath fallback_path;
 308   chromeos::WallpaperManager::WallpaperResolution resolution =
 309       chromeos::WallpaperManager::GetAppropriateResolution();
 310
 311   std::string file_name = GURL(params->url).ExtractFileName();
 312   CHECK(PathService::Get(chrome::DIR_CHROMEOS_WALLPAPERS,
 313                          &wallpaper_path));
 314   fallback_path = wallpaper_path.Append(file_name);
 315   if (params->layout != wallpaper_private::WALLPAPER_LAYOUT_STRETCH &&
 316       resolution == chromeos::WallpaperManager::WALLPAPER_RESOLUTION_SMALL) {
 317     file_name = base::FilePath(file_name).InsertBeforeExtension(
 318         chromeos::kSmallWallpaperSuffix).value();
 319   }
 320   wallpaper_path = wallpaper_path.Append(file_name);
 321
 322   sequence_token_ = BrowserThread::GetBlockingPool()->
 323       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 324   scoped_refptr<base::SequencedTaskRunner> task_runner =
 325       BrowserThread::GetBlockingPool()->
 326           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 327               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 328
 329   task_runner->PostTask(FROM_HERE,
 330       base::Bind(
 331           &WallpaperPrivateSetWallpaperIfExistsFunction::
 332               ReadFileAndInitiateStartDecode,
 333           this, wallpaper_path, fallback_path));
 334   return true;
 335 }
 336
 337 void WallpaperPrivateSetWallpaperIfExistsFunction::
 338     ReadFileAndInitiateStartDecode(const base::FilePath& file_path,
 339                                    const base::FilePath& fallback_path) {
 340   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 341       sequence_token_));
 342   std::string data;
 343   base::FilePath path = file_path;
 344
 345   if (!base::PathExists(file_path))
 346     path = fallback_path;
 347
 348   if (base::PathExists(path) &&
 349       base::ReadFileToString(path, &data)) {
 350     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
 351         base::Bind(&WallpaperPrivateSetWallpaperIfExistsFunction::StartDecode,
 352                    this, data));
 353     return;
 354   }
 355   std::string error = base::StringPrintf(
 356         "Failed to set wallpaper %s from file system.",
 357         path.BaseName().value().c_str());
 358   BrowserThread::PostTask(
 359       BrowserThread::UI, FROM_HERE,
 360       base::Bind(&WallpaperPrivateSetWallpaperIfExistsFunction::OnFileNotExists,
 361                  this, error));
 362 }
 363
 364 void WallpaperPrivateSetWallpaperIfExistsFunction::OnWallpaperDecoded(
 365     const gfx::ImageSkia& image) {
 366   // Set unsafe_wallpaper_decoder_ to null since the decoding already finished.
 367   unsafe_wallpaper_decoder_ = NULL;
 368
 369   chromeos::WallpaperManager* wallpaper_manager =
 370       chromeos::WallpaperManager::Get();
 371   ash::WallpaperLayout layout = wallpaper_api_util::GetLayoutEnum(
 372       wallpaper_private::ToString(params->layout));
 373
 374   bool update_wallpaper =
 375       user_id_ == user_manager::UserManager::Get()->GetActiveUser()->email();
 376   wallpaper_manager->SetWallpaperFromImageSkia(
 377       user_id_, image, layout, update_wallpaper);
 378   bool is_persistent = !user_manager::UserManager::Get()
 379                             ->IsCurrentUserNonCryptohomeDataEphemeral();
 380   chromeos::WallpaperInfo info = {params->url, layout,
 381                                   user_manager::User::ONLINE,
 382                                   base::Time::Now().LocalMidnight()};
 383   wallpaper_manager->SetUserWallpaperInfo(user_id_, info, is_persistent);
 384   SetResult(new base::FundamentalValue(true));
 385   Profile* profile = Profile::FromBrowserContext(browser_context());
 386   // This API is only available to the component wallpaper picker. We do not
 387   // need to show the app's name if it is the component wallpaper picker. So set
 388   // the pref to empty string.
 389   profile->GetPrefs()->SetString(prefs::kCurrentWallpaperAppName,
 390                                  std::string());
 391   SendResponse(true);
 392 }
 393
 394 void WallpaperPrivateSetWallpaperIfExistsFunction::OnFileNotExists(
 395     const std::string& error) {
 396   SetResult(new base::FundamentalValue(false));
 397   OnFailure(error);
 398 }
 399
 400 WallpaperPrivateSetWallpaperFunction::WallpaperPrivateSetWallpaperFunction() {
 401 }
 402
 403 WallpaperPrivateSetWallpaperFunction::~WallpaperPrivateSetWallpaperFunction() {
 404 }
 405
 406 bool WallpaperPrivateSetWallpaperFunction::RunAsync() {
 407   params = set_wallpaper::Params::Create(*args_);
 408   EXTENSION_FUNCTION_VALIDATE(params);
 409
 410   // Gets email address while at UI thread.
 411   user_id_ = user_manager::UserManager::Get()->GetActiveUser()->email();
 412
 413   StartDecode(params->wallpaper);
 414
 415   return true;
 416 }
 417
 418 void WallpaperPrivateSetWallpaperFunction::OnWallpaperDecoded(
 419     const gfx::ImageSkia& image) {
 420   wallpaper_ = image;
 421   // Set unsafe_wallpaper_decoder_ to null since the decoding already finished.
 422   unsafe_wallpaper_decoder_ = NULL;
 423
 424   sequence_token_ = BrowserThread::GetBlockingPool()->
 425       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 426   scoped_refptr<base::SequencedTaskRunner> task_runner =
 427       BrowserThread::GetBlockingPool()->
 428           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 429               base::SequencedWorkerPool::BLOCK_SHUTDOWN);
 430
 431   task_runner->PostTask(FROM_HERE,
 432       base::Bind(&WallpaperPrivateSetWallpaperFunction::SaveToFile, this));
 433 }
 434
 435 void WallpaperPrivateSetWallpaperFunction::SaveToFile() {
 436   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 437       sequence_token_));
 438   std::string file_name = GURL(params->url).ExtractFileName();
 439   if (SaveData(chrome::DIR_CHROMEOS_WALLPAPERS, file_name, params->wallpaper)) {
 440     wallpaper_.EnsureRepsForSupportedScales();
 441     scoped_ptr<gfx::ImageSkia> deep_copy(wallpaper_.DeepCopy());
 442     // ImageSkia is not RefCountedThreadSafe. Use a deep copied ImageSkia if
 443     // post to another thread.
 444     BrowserThread::PostTask(
 445         BrowserThread::UI,
 446         FROM_HERE,
 447         base::Bind(&WallpaperPrivateSetWallpaperFunction::SetDecodedWallpaper,
 448                    this,
 449                    base::Passed(deep_copy.Pass())));
 450
 451     base::FilePath wallpaper_dir;
 452     CHECK(PathService::Get(chrome::DIR_CHROMEOS_WALLPAPERS, &wallpaper_dir));
 453     base::FilePath file_path = wallpaper_dir.Append(
 454         file_name).InsertBeforeExtension(chromeos::kSmallWallpaperSuffix);
 455     if (base::PathExists(file_path))
 456       return;
 457     // Generates and saves small resolution wallpaper. Uses CENTER_CROPPED to
 458     // maintain the aspect ratio after resize.
 459     chromeos::WallpaperManager::Get()->ResizeAndSaveWallpaper(
 460         wallpaper_,
 461         file_path,
 462         ash::WALLPAPER_LAYOUT_CENTER_CROPPED,
 463         chromeos::kSmallWallpaperMaxWidth,
 464         chromeos::kSmallWallpaperMaxHeight,
 465         NULL);
 466   } else {
 467     std::string error = base::StringPrintf(
 468         "Failed to create/write wallpaper to %s.", file_name.c_str());
 469     BrowserThread::PostTask(
 470         BrowserThread::UI, FROM_HERE,
 471         base::Bind(&WallpaperPrivateSetWallpaperFunction::OnFailure,
 472                    this, error));
 473   }
 474 }
 475
 476 void WallpaperPrivateSetWallpaperFunction::SetDecodedWallpaper(
 477     scoped_ptr<gfx::ImageSkia> image) {
 478   chromeos::WallpaperManager* wallpaper_manager =
 479       chromeos::WallpaperManager::Get();
 480
 481   ash::WallpaperLayout layout = wallpaper_api_util::GetLayoutEnum(
 482       wallpaper_private::ToString(params->layout));
 483
 484   bool update_wallpaper =
 485       user_id_ == user_manager::UserManager::Get()->GetActiveUser()->email();
 486   wallpaper_manager->SetWallpaperFromImageSkia(
 487       user_id_, *image.get(), layout, update_wallpaper);
 488
 489   bool is_persistent = !user_manager::UserManager::Get()
 490                             ->IsCurrentUserNonCryptohomeDataEphemeral();
 491   chromeos::WallpaperInfo info = {params->url, layout,
 492                                   user_manager::User::ONLINE,
 493                                   base::Time::Now().LocalMidnight()};
 494   Profile* profile = Profile::FromBrowserContext(browser_context());
 495   // This API is only available to the component wallpaper picker. We do not
 496   // need to show the app's name if it is the component wallpaper picker. So set
 497   // the pref to empty string.
 498   profile->GetPrefs()->SetString(prefs::kCurrentWallpaperAppName,
 499                                  std::string());
 500   wallpaper_manager->SetUserWallpaperInfo(user_id_, info, is_persistent);
 501   SendResponse(true);
 502 }
 503
 504 WallpaperPrivateResetWallpaperFunction::
 505     WallpaperPrivateResetWallpaperFunction() {}
 506
 507 WallpaperPrivateResetWallpaperFunction::
 508     ~WallpaperPrivateResetWallpaperFunction() {}
 509
 510 bool WallpaperPrivateResetWallpaperFunction::RunAsync() {
 511   chromeos::WallpaperManager* wallpaper_manager =
 512       chromeos::WallpaperManager::Get();
 513   user_manager::UserManager* user_manager = user_manager::UserManager::Get();
 514
 515   std::string user_id = user_manager->GetActiveUser()->email();
 516   wallpaper_manager->RemoveUserWallpaperInfo(user_id);
 517
 518   chromeos::WallpaperInfo info = {std::string(),
 519                                   ash::WALLPAPER_LAYOUT_CENTER,
 520                                   user_manager::User::DEFAULT,
 521                                   base::Time::Now().LocalMidnight()};
 522   bool is_persistent =
 523       !user_manager->IsCurrentUserNonCryptohomeDataEphemeral();
 524   wallpaper_manager->SetUserWallpaperInfo(user_id, info, is_persistent);
 525
 526   wallpaper_manager->SetDefaultWallpaperNow(user_id);
 527   Profile* profile = Profile::FromBrowserContext(browser_context());
 528   // This API is only available to the component wallpaper picker. We do not
 529   // need to show the app's name if it is the component wallpaper picker. So set
 530   // the pref to empty string.
 531   profile->GetPrefs()->SetString(prefs::kCurrentWallpaperAppName,
 532                                  std::string());
 533   return true;
 534 }
 535
 536 WallpaperPrivateSetCustomWallpaperFunction::
 537     WallpaperPrivateSetCustomWallpaperFunction() {}
 538
 539 WallpaperPrivateSetCustomWallpaperFunction::
 540     ~WallpaperPrivateSetCustomWallpaperFunction() {}
 541
 542 bool WallpaperPrivateSetCustomWallpaperFunction::RunAsync() {
 543   params = set_custom_wallpaper::Params::Create(*args_);
 544   EXTENSION_FUNCTION_VALIDATE(params);
 545
 546   // Gets email address and username hash while at UI thread.
 547   user_id_ = user_manager::UserManager::Get()->GetActiveUser()->email();
 548   user_id_hash_ =
 549       user_manager::UserManager::Get()->GetActiveUser()->username_hash();
 550
 551   StartDecode(params->wallpaper);
 552
 553   return true;
 554 }
 555
 556 void WallpaperPrivateSetCustomWallpaperFunction::OnWallpaperDecoded(
 557     const gfx::ImageSkia& image) {
 558   chromeos::WallpaperManager* wallpaper_manager =
 559       chromeos::WallpaperManager::Get();
 560   base::FilePath thumbnail_path = wallpaper_manager->GetCustomWallpaperPath(
 561       chromeos::kThumbnailWallpaperSubDir, user_id_hash_, params->file_name);
 562
 563   sequence_token_ = BrowserThread::GetBlockingPool()->
 564       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 565   scoped_refptr<base::SequencedTaskRunner> task_runner =
 566       BrowserThread::GetBlockingPool()->
 567           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 568               base::SequencedWorkerPool::BLOCK_SHUTDOWN);
 569
 570   ash::WallpaperLayout layout = wallpaper_api_util::GetLayoutEnum(
 571       wallpaper_private::ToString(params->layout));
 572
 573   bool update_wallpaper =
 574       user_id_ == user_manager::UserManager::Get()->GetActiveUser()->email();
 575   wallpaper_manager->SetCustomWallpaper(user_id_,
 576                                         user_id_hash_,
 577                                         params->file_name,
 578                                         layout,
 579                                         user_manager::User::CUSTOMIZED,
 580                                         image,
 581                                         update_wallpaper);
 582   unsafe_wallpaper_decoder_ = NULL;
 583
 584   Profile* profile = Profile::FromBrowserContext(browser_context());
 585   // This API is only available to the component wallpaper picker. We do not
 586   // need to show the app's name if it is the component wallpaper picker. So set
 587   // the pref to empty string.
 588   profile->GetPrefs()->SetString(prefs::kCurrentWallpaperAppName,
 589                                  std::string());
 590
 591   if (params->generate_thumbnail) {
 592     image.EnsureRepsForSupportedScales();
 593     scoped_ptr<gfx::ImageSkia> deep_copy(image.DeepCopy());
 594     // Generates thumbnail before call api function callback. We can then
 595     // request thumbnail in the javascript callback.
 596     task_runner->PostTask(FROM_HERE,
 597         base::Bind(
 598             &WallpaperPrivateSetCustomWallpaperFunction::GenerateThumbnail,
 599             this, thumbnail_path, base::Passed(&deep_copy)));
 600   } else {
 601     SendResponse(true);
 602   }
 603 }
 604
 605 void WallpaperPrivateSetCustomWallpaperFunction::GenerateThumbnail(
 606     const base::FilePath& thumbnail_path, scoped_ptr<gfx::ImageSkia> image) {
 607   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 608       sequence_token_));
 609   if (!base::PathExists(thumbnail_path.DirName()))
 610     base::CreateDirectory(thumbnail_path.DirName());
 611
 612   scoped_refptr<base::RefCountedBytes> data;
 613   chromeos::WallpaperManager::Get()->ResizeImage(
 614       *image,
 615       ash::WALLPAPER_LAYOUT_STRETCH,
 616       chromeos::kWallpaperThumbnailWidth,
 617       chromeos::kWallpaperThumbnailHeight,
 618       &data,
 619       NULL);
 620   BrowserThread::PostTask(
 621         BrowserThread::UI, FROM_HERE,
 622         base::Bind(
 623             &WallpaperPrivateSetCustomWallpaperFunction::ThumbnailGenerated,
 624             this, data));
 625 }
 626
 627 void WallpaperPrivateSetCustomWallpaperFunction::ThumbnailGenerated(
 628     base::RefCountedBytes* data) {
 629   BinaryValue* result = BinaryValue::CreateWithCopiedBuffer(
 630       reinterpret_cast<const char*>(data->front()), data->size());
 631   SetResult(result);
 632   SendResponse(true);
 633 }
 634
 635 WallpaperPrivateSetCustomWallpaperLayoutFunction::
 636     WallpaperPrivateSetCustomWallpaperLayoutFunction() {}
 637
 638 WallpaperPrivateSetCustomWallpaperLayoutFunction::
 639     ~WallpaperPrivateSetCustomWallpaperLayoutFunction() {}
 640
 641 bool WallpaperPrivateSetCustomWallpaperLayoutFunction::RunAsync() {
 642   scoped_ptr<set_custom_wallpaper_layout::Params> params(
 643       set_custom_wallpaper_layout::Params::Create(*args_));
 644   EXTENSION_FUNCTION_VALIDATE(params);
 645
 646   chromeos::WallpaperManager* wallpaper_manager =
 647       chromeos::WallpaperManager::Get();
 648   chromeos::WallpaperInfo info;
 649   wallpaper_manager->GetLoggedInUserWallpaperInfo(&info);
 650   if (info.type != user_manager::User::CUSTOMIZED) {
 651     SetError("Only custom wallpaper can change layout.");
 652     SendResponse(false);
 653     return false;
 654   }
 655   info.layout = wallpaper_api_util::GetLayoutEnum(
 656       wallpaper_private::ToString(params->layout));
 657
 658   std::string email =
 659       user_manager::UserManager::Get()->GetActiveUser()->email();
 660   bool is_persistent = !user_manager::UserManager::Get()
 661                             ->IsCurrentUserNonCryptohomeDataEphemeral();
 662   wallpaper_manager->SetUserWallpaperInfo(email, info, is_persistent);
 663   wallpaper_manager->UpdateWallpaper(false /* clear_cache */);
 664   SendResponse(true);
 665
 666   // Gets email address while at UI thread.
 667   return true;
 668 }
 669
 670 WallpaperPrivateMinimizeInactiveWindowsFunction::
 671     WallpaperPrivateMinimizeInactiveWindowsFunction() {
 672 }
 673
 674 WallpaperPrivateMinimizeInactiveWindowsFunction::
 675     ~WallpaperPrivateMinimizeInactiveWindowsFunction() {
 676 }
 677
 678 bool WallpaperPrivateMinimizeInactiveWindowsFunction::RunAsync() {
 679   WindowStateManager::MinimizeInactiveWindows(
 680       user_manager::UserManager::Get()->GetActiveUser()->username_hash());
 681   return true;
 682 }
 683
 684 WallpaperPrivateRestoreMinimizedWindowsFunction::
 685     WallpaperPrivateRestoreMinimizedWindowsFunction() {
 686 }
 687
 688 WallpaperPrivateRestoreMinimizedWindowsFunction::
 689     ~WallpaperPrivateRestoreMinimizedWindowsFunction() {
 690 }
 691
 692 bool WallpaperPrivateRestoreMinimizedWindowsFunction::RunAsync() {
 693   WindowStateManager::RestoreWindows(
 694       user_manager::UserManager::Get()->GetActiveUser()->username_hash());
 695   return true;
 696 }
 697
 698 WallpaperPrivateGetThumbnailFunction::WallpaperPrivateGetThumbnailFunction() {
 699 }
 700
 701 WallpaperPrivateGetThumbnailFunction::~WallpaperPrivateGetThumbnailFunction() {
 702 }
 703
 704 bool WallpaperPrivateGetThumbnailFunction::RunAsync() {
 705   scoped_ptr<get_thumbnail::Params> params(
 706       get_thumbnail::Params::Create(*args_));
 707   EXTENSION_FUNCTION_VALIDATE(params);
 708
 709   base::FilePath thumbnail_path;
 710   std::string email =
 711       user_manager::UserManager::Get()->GetActiveUser()->email();
 712   if (params->source == get_thumbnail::Params::SOURCE_ONLINE) {
 713     std::string file_name = GURL(params->url_or_file).ExtractFileName();
 714     CHECK(PathService::Get(chrome::DIR_CHROMEOS_WALLPAPER_THUMBNAILS,
 715                            &thumbnail_path));
 716     thumbnail_path = thumbnail_path.Append(file_name);
 717   } else {
 718     if (!IsOEMDefaultWallpaper()) {
 719       SetError("No OEM wallpaper.");
 720       SendResponse(false);
 721       return false;
 722     }
 723
 724     // TODO(bshe): Small resolution wallpaper is used here as wallpaper
 725     // thumbnail. We should either resize it or include a wallpaper thumbnail in
 726     // addition to large and small wallpaper resolutions.
 727     thumbnail_path = CommandLine::ForCurrentProcess()->GetSwitchValuePath(
 728         ash::switches::kAshDefaultWallpaperSmall);
 729   }
 730
 731   sequence_token_ = BrowserThread::GetBlockingPool()->
 732       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 733   scoped_refptr<base::SequencedTaskRunner> task_runner =
 734       BrowserThread::GetBlockingPool()->
 735           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 736               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 737
 738   task_runner->PostTask(FROM_HERE,
 739       base::Bind(&WallpaperPrivateGetThumbnailFunction::Get, this,
 740                  thumbnail_path));
 741   return true;
 742 }
 743
 744 void WallpaperPrivateGetThumbnailFunction::Failure(
 745     const std::string& file_name) {
 746   SetError(base::StringPrintf("Failed to access wallpaper thumbnails for %s.",
 747                               file_name.c_str()));
 748   SendResponse(false);
 749 }
 750
 751 void WallpaperPrivateGetThumbnailFunction::FileNotLoaded() {
 752   SendResponse(true);
 753 }
 754
 755 void WallpaperPrivateGetThumbnailFunction::FileLoaded(
 756     const std::string& data) {
 757   BinaryValue* thumbnail = BinaryValue::CreateWithCopiedBuffer(data.c_str(),
 758                                                                data.size());
 759   SetResult(thumbnail);
 760   SendResponse(true);
 761 }
 762
 763 void WallpaperPrivateGetThumbnailFunction::Get(const base::FilePath& path) {
 764   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 765       sequence_token_));
 766   std::string data;
 767   if (GetData(path, &data)) {
 768     if (data.empty()) {
 769       BrowserThread::PostTask(
 770         BrowserThread::UI, FROM_HERE,
 771         base::Bind(&WallpaperPrivateGetThumbnailFunction::FileNotLoaded, this));
 772     } else {
 773       BrowserThread::PostTask(
 774         BrowserThread::UI, FROM_HERE,
 775         base::Bind(&WallpaperPrivateGetThumbnailFunction::FileLoaded, this,
 776                    data));
 777     }
 778   } else {
 779     BrowserThread::PostTask(
 780         BrowserThread::UI, FROM_HERE,
 781         base::Bind(&WallpaperPrivateGetThumbnailFunction::Failure, this,
 782                    path.BaseName().value()));
 783   }
 784 }
 785
 786 WallpaperPrivateSaveThumbnailFunction::WallpaperPrivateSaveThumbnailFunction() {
 787 }
 788
 789 WallpaperPrivateSaveThumbnailFunction::
 790     ~WallpaperPrivateSaveThumbnailFunction() {}
 791
 792 bool WallpaperPrivateSaveThumbnailFunction::RunAsync() {
 793   scoped_ptr<save_thumbnail::Params> params(
 794       save_thumbnail::Params::Create(*args_));
 795   EXTENSION_FUNCTION_VALIDATE(params);
 796
 797   sequence_token_ = BrowserThread::GetBlockingPool()->
 798       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 799   scoped_refptr<base::SequencedTaskRunner> task_runner =
 800       BrowserThread::GetBlockingPool()->
 801           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 802               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 803
 804   task_runner->PostTask(FROM_HERE,
 805       base::Bind(&WallpaperPrivateSaveThumbnailFunction::Save,
 806                  this, params->data, GURL(params->url).ExtractFileName()));
 807   return true;
 808 }
 809
 810 void WallpaperPrivateSaveThumbnailFunction::Failure(
 811     const std::string& file_name) {
 812   SetError(base::StringPrintf("Failed to create/write thumbnail of %s.",
 813                               file_name.c_str()));
 814   SendResponse(false);
 815 }
 816
 817 void WallpaperPrivateSaveThumbnailFunction::Success() {
 818   SendResponse(true);
 819 }
 820
 821 void WallpaperPrivateSaveThumbnailFunction::Save(const std::string& data,
 822                                           const std::string& file_name) {
 823   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 824       sequence_token_));
 825   if (SaveData(chrome::DIR_CHROMEOS_WALLPAPER_THUMBNAILS, file_name, data)) {
 826     BrowserThread::PostTask(
 827       BrowserThread::UI, FROM_HERE,
 828       base::Bind(&WallpaperPrivateSaveThumbnailFunction::Success, this));
 829   } else {
 830     BrowserThread::PostTask(
 831           BrowserThread::UI, FROM_HERE,
 832           base::Bind(&WallpaperPrivateSaveThumbnailFunction::Failure,
 833                      this, file_name));
 834   }
 835 }
 836
 837 WallpaperPrivateGetOfflineWallpaperListFunction::
 838     WallpaperPrivateGetOfflineWallpaperListFunction() {
 839 }
 840
 841 WallpaperPrivateGetOfflineWallpaperListFunction::
 842     ~WallpaperPrivateGetOfflineWallpaperListFunction() {
 843 }
 844
 845 bool WallpaperPrivateGetOfflineWallpaperListFunction::RunAsync() {
 846   sequence_token_ = BrowserThread::GetBlockingPool()->
 847       GetNamedSequenceToken(chromeos::kWallpaperSequenceTokenName);
 848   scoped_refptr<base::SequencedTaskRunner> task_runner =
 849       BrowserThread::GetBlockingPool()->
 850           GetSequencedTaskRunnerWithShutdownBehavior(sequence_token_,
 851               base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 852
 853   task_runner->PostTask(FROM_HERE,
 854       base::Bind(&WallpaperPrivateGetOfflineWallpaperListFunction::GetList,
 855                  this));
 856   return true;
 857 }
 858
 859 void WallpaperPrivateGetOfflineWallpaperListFunction::GetList() {
 860   DCHECK(BrowserThread::GetBlockingPool()->IsRunningSequenceOnCurrentThread(
 861       sequence_token_));
 862   std::vector<std::string> file_list;
 863   base::FilePath wallpaper_dir;
 864   CHECK(PathService::Get(chrome::DIR_CHROMEOS_WALLPAPERS, &wallpaper_dir));
 865   if (base::DirectoryExists(wallpaper_dir)) {
 866     base::FileEnumerator files(wallpaper_dir, false,
 867                                base::FileEnumerator::FILES);
 868     for (base::FilePath current = files.Next(); !current.empty();
 869          current = files.Next()) {
 870       std::string file_name = current.BaseName().RemoveExtension().value();
 871       // Do not add file name of small resolution wallpaper to the list.
 872       if (!EndsWith(file_name, chromeos::kSmallWallpaperSuffix, true))
 873         file_list.push_back(current.BaseName().value());
 874     }
 875   }
 876   BrowserThread::PostTask(
 877       BrowserThread::UI, FROM_HERE,
 878       base::Bind(&WallpaperPrivateGetOfflineWallpaperListFunction::OnComplete,
 879                  this, file_list));
 880 }
 881
 882 void WallpaperPrivateGetOfflineWallpaperListFunction::OnComplete(
 883     const std::vector<std::string>& file_list) {
 884   base::ListValue* results = new base::ListValue();
 885   results->AppendStrings(file_list);
 886   SetResult(results);
 887   SendResponse(true);
 888 }