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| 1 // Copyright 2017 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 CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_ICON_LOADER_H_ |
| 6 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_ICON_LOADER_H_ |
| 7 |
| 8 #include "base/files/file_path.h" |
| 9 #include "base/memory/ref_counted_memory.h" |
| 10 #include "base/memory/weak_ptr.h" |
| 11 #include "base/sequenced_task_runner.h" |
| 12 #include "chrome/browser/image_decoder.h" |
| 13 #include "ui/gfx/image/image_skia.h" |
| 14 |
| 15 namespace chromeos { |
| 16 |
| 17 // Loads locally stored icon data and decodes it. |
| 18 class KioskAppIconLoader { |
| 19 public: |
| 20 enum LoadResult { |
| 21 SUCCESS, |
| 22 FAILED_TO_LOAD, |
| 23 FAILED_TO_DECODE, |
| 24 }; |
| 25 |
| 26 class Delegate { |
| 27 public: |
| 28 Delegate() = default; |
| 29 |
| 30 virtual void OnIconLoadSuccess(const gfx::ImageSkia& icon) = 0; |
| 31 virtual void OnIconLoadFailure() = 0; |
| 32 |
| 33 protected: |
| 34 virtual ~Delegate() = default; |
| 35 |
| 36 private: |
| 37 DISALLOW_COPY_AND_ASSIGN(Delegate); |
| 38 }; |
| 39 |
| 40 KioskAppIconLoader(const base::WeakPtr<Delegate>& client, |
| 41 const base::FilePath& icon_path); |
| 42 |
| 43 void Start(); |
| 44 |
| 45 private: |
| 46 friend class base::RefCountedThreadSafe<KioskAppIconLoader>; |
| 47 |
| 48 ~KioskAppIconLoader(); |
| 49 |
| 50 class IconImageRequest : public ImageDecoder::ImageRequest { |
| 51 public: |
| 52 IconImageRequest( |
| 53 const scoped_refptr<base::SequencedTaskRunner>& task_runner, |
| 54 KioskAppIconLoader* icon_loader); |
| 55 |
| 56 void OnImageDecoded(const SkBitmap& decoded_image) override; |
| 57 |
| 58 void OnDecodeImageFailed() override; |
| 59 |
| 60 private: |
| 61 ~IconImageRequest() override = default; |
| 62 KioskAppIconLoader* icon_loader_; |
| 63 }; |
| 64 |
| 65 // Loads the icon from locally stored |icon_path_| on the blocking pool |
| 66 void LoadOnBlockingPool(); |
| 67 void ReportResultOnBlockingPool(LoadResult result); |
| 68 void NotifyClient(); |
| 69 void ReportResultOnUIThread(); |
| 70 |
| 71 base::WeakPtr<Delegate> client_; |
| 72 base::FilePath icon_path_; |
| 73 |
| 74 LoadResult load_result_; |
| 75 scoped_refptr<base::SequencedTaskRunner> task_runner_; |
| 76 |
| 77 gfx::ImageSkia icon_; |
| 78 scoped_refptr<base::RefCountedString> raw_icon_; |
| 79 |
| 80 DISALLOW_COPY_AND_ASSIGN(KioskAppIconLoader); |
| 81 }; |
| 82 |
| 83 } // namespace chromeos |
| 84 |
| 85 #endif // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_ICON_LOADER_H_ |
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