cheets: implement cros side of WallpaperManagerService.

chrome/browser/chromeos/arc/arc_wallpaper_handler.cc

-// Copyright 2016 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.
-
-#include "chrome/browser/chromeos/arc/arc_wallpaper_handler.h"
-
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "base/logging.h"
-#include "base/memory/ptr_util.h"
-#include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
-#include "components/signin/core/account_id/account_id.h"
-#include "components/user_manager/user_manager.h"
-#include "components/wallpaper/wallpaper_files_id.h"
-#include "components/wallpaper/wallpaper_layout.h"
-#include "content/public/browser/browser_thread.h"
-#include "ui/gfx/image/image_skia.h"
-
-using user_manager::UserManager;
-
-namespace arc {
-
-namespace {
-
-constexpr char kAndroidWallpaperFilename[] = "android.jpg";
-
-// Sets a decoded bitmap as the wallpaper.
-void SetBitmapAsWallpaper(const SkBitmap& bitmap) {
-  // Make the SkBitmap immutable as we won't modify it. This is important
-  // because otherwise it gets duplicated during painting, wasting memory.
-  SkBitmap immutable_bitmap(bitmap);
-  immutable_bitmap.setImmutable();
-  gfx::ImageSkia image = gfx::ImageSkia::CreateFrom1xBitmap(immutable_bitmap);
-  image.MakeThreadSafe();
-
-  chromeos::WallpaperManager* wallpaper_manager =
-      chromeos::WallpaperManager::Get();
-
-  const AccountId& account_id =
-      UserManager::Get()->GetPrimaryUser()->GetAccountId();
-  wallpaper::WallpaperFilesId wallpaper_files_id =
-      wallpaper_manager->GetFilesId(account_id);
-  const bool update_wallpaper =
-      account_id == UserManager::Get()->GetActiveUser()->GetAccountId();
-  // TODO(crbug.com/618922): Allow specifying layout.
-  wallpaper_manager->SetCustomWallpaper(
-      account_id, wallpaper_files_id, kAndroidWallpaperFilename,
-      wallpaper::WALLPAPER_LAYOUT_STRETCH, user_manager::User::CUSTOMIZED,
-      image, update_wallpaper);
-
-  // TODO(crbug.com/618922): Register the wallpaper to Chrome OS wallpaper
-  // picker. Currently the new wallpaper does not appear there. The best way to
-  // make this happen seems to do the same things as wallpaper_api.cc and
-  // wallpaper_private_api.cc.
-}
-
-}  // namespace
-
-ArcWallpaperHandler::ArcWallpaperHandler() = default;
-
-ArcWallpaperHandler::~ArcWallpaperHandler() {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  // Make sure the callback is never called after destruction. It is safe to
-  // call Cancel() even when there is no in-flight request.
-  ImageDecoder::Cancel(this);
-}
-
-void ArcWallpaperHandler::SetWallpaper(std::vector<uint8_t> jpeg_data) {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  // If there is an in-flight request, cancel it. It is safe to call Cancel()
-  // even when there is no in-flight request.
-  ImageDecoder::Cancel(this);
-  ImageDecoder::StartWithOptions(this, std::move(jpeg_data),
-                                 ImageDecoder::ROBUST_JPEG_CODEC, true);
-}
-
-void ArcWallpaperHandler::OnImageDecoded(const SkBitmap& bitmap) {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  SetBitmapAsWallpaper(bitmap);
-}
-
-void ArcWallpaperHandler::OnDecodeImageFailed() {
-  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  LOG(ERROR) << "Failed to decode wallpaper image.";
-}
-
-}  // namespace arc