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| 1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ | 5 #ifndef COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ |
| 6 #define COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ | 6 #define COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ |
| 7 | 7 |
| 8 #include <vector> | 8 #include <vector> |
| 9 | 9 |
| 10 #include "base/task/cancelable_task_tracker.h" | 10 #include "base/task/cancelable_task_tracker.h" |
| 11 #include "components/favicon_base/favicon_callback.h" | 11 #include "components/favicon_base/favicon_callback.h" |
| 12 #include "components/keyed_service/core/keyed_service.h" | 12 #include "components/keyed_service/core/keyed_service.h" |
| 13 | 13 |
| 14 class GURL; | 14 class GURL; |
| 15 | 15 |
| 16 namespace base { | 16 namespace base { |
| 17 class TaskRunner; | 17 class TaskRunner; |
| 18 } | 18 } |
| 19 | 19 |
| 20 namespace favicon_base { |
| 21 struct FallbackIconStyle; |
| 22 } |
| 23 |
| 20 namespace favicon { | 24 namespace favicon { |
| 21 | 25 |
| 22 class FaviconService; | 26 class FaviconService; |
| 23 | 27 |
| 24 // The large icon service provides methods to access large icons. It relies on | 28 // The large icon service provides methods to access large icons. It relies on |
| 25 // the favicon service. | 29 // the favicon service. |
| 26 class LargeIconService : public KeyedService { | 30 class LargeIconService : public KeyedService { |
| 27 public: | 31 public: |
| 28 LargeIconService( | 32 LargeIconService( |
| 29 FaviconService* favicon_service, | 33 FaviconService* favicon_service, |
| 30 const scoped_refptr<base::TaskRunner>& background_task_runner); | 34 const scoped_refptr<base::TaskRunner>& background_task_runner); |
| 31 ~LargeIconService() override; | 35 ~LargeIconService() override; |
| 32 | 36 |
| 33 // Requests the best large icon for the page at |page_url|. | 37 // Requests the best large icon for the page at |page_url|. |
| 34 // Case 1. An icon exists whose size is >= |min_source_size_in_pixel|: | 38 // Case 1. An icon exists whose size is >= |min_source_size_in_pixel|: |
| 35 // - If |desired_size_in_pixel| == 0: returns icon as is. | 39 // - If |desired_size_in_pixel| == 0: returns icon as is. |
| 36 // - Else: returns the icon resized to |desired_size_in_pixel|. | 40 // - Else: returns the icon resized to |desired_size_in_pixel|. |
| 37 // Case 2. An icon exists whose size is < |min_source_size_in_pixel|: | 41 // Case 2. An icon exists whose size is < |min_source_size_in_pixel|: |
| 38 // - Extracts dominant color of smaller image, returns a fallback icon style | 42 // - Extracts dominant color of smaller image, returns a fallback icon style |
| 39 // that has a matching background. | 43 // that has a matching background. |
| 40 // Case 3. No icon exists. | 44 // Case 3. No icon exists. |
| 41 // - Returns the default fallback icon style. | 45 // - Returns the default fallback icon style. |
| 42 // For cases 2 and 3, this function returns the style of the fallback icon | 46 // For cases 2 and 3, this function returns the style of the fallback icon |
| 43 // instead of rendering an icon so clients can render the icon themselves. | 47 // instead of rendering an icon so clients can render the icon themselves. |
| 44 base::CancelableTaskTracker::TaskId GetLargeIconOrFallbackStyle( | 48 base::CancelableTaskTracker::TaskId GetLargeIconOrFallbackStyle( |
| 45 const GURL& page_url, | 49 const GURL& page_url, |
| 46 int min_source_size_in_pixel, | 50 int min_source_size_in_pixel, |
| 47 int desired_size_in_pixel, | 51 int desired_size_in_pixel, |
| 48 const favicon_base::LargeIconCallback& callback, | 52 const favicon_base::FallbackIconStyle& fallback_icon_style, |
| 49 base::CancelableTaskTracker* tracker); | 53 const favicon_base::LargeIconCallback& callback, |
| 54 base::CancelableTaskTracker* tracker); |
| 50 | 55 |
| 51 private: | 56 private: |
| 52 // For testing. | 57 // For testing. |
| 53 friend class TestLargeIconService; | 58 friend class TestLargeIconService; |
| 54 | 59 |
| 55 FaviconService* favicon_service_; | 60 FaviconService* favicon_service_; |
| 56 scoped_refptr<base::TaskRunner> background_task_runner_; | 61 scoped_refptr<base::TaskRunner> background_task_runner_; |
| 57 | 62 |
| 58 // A pre-populated list of icon types to consider when looking for large | 63 // A pre-populated list of icon types to consider when looking for large |
| 59 // icons. This is an optimization over populating an icon type vector on each | 64 // icons. This is an optimization over populating an icon type vector on each |
| 60 // request. | 65 // request. |
| 61 std::vector<int> large_icon_types_; | 66 std::vector<int> large_icon_types_; |
| 62 | 67 |
| 63 DISALLOW_COPY_AND_ASSIGN(LargeIconService); | 68 DISALLOW_COPY_AND_ASSIGN(LargeIconService); |
| 64 }; | 69 }; |
| 65 | 70 |
| 66 } // namespace favicon | 71 } // namespace favicon |
| 67 | 72 |
| 68 #endif // COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ | 73 #endif // COMPONENTS_FAVICON_CORE_LARGE_ICON_SERVICE_H_ |
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