| // Copyright 2018 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 COMPONENTS_IMAGE_FETCHER_CORE_CACHED_IMAGE_FETCHER_H_ |
| #define COMPONENTS_IMAGE_FETCHER_CORE_CACHED_IMAGE_FETCHER_H_ |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/containers/flat_map.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/task/post_task.h" |
| #include "base/timer/timer.h" |
| #include "components/image_fetcher/core/cache/cached_image_fetcher_metrics_reporter.h" |
| #include "components/image_fetcher/core/image_decoder.h" |
| #include "components/image_fetcher/core/image_fetcher.h" |
| #include "components/image_fetcher/core/image_fetcher_types.h" |
| #include "net/traffic_annotation/network_traffic_annotation.h" |
| #include "ui/gfx/geometry/size.h" |
| #include "url/gurl.h" |
| |
| namespace gfx { |
| class Image; |
| class Size; |
| } // namespace gfx |
| |
| namespace image_fetcher { |
| |
| class ImageCache; |
| class ImageFetcher; |
| struct RequestMetadata; |
| |
| // TODO(wylieb): Consider creating a struct to encapsulate the request. |
| // CachedImageFetcher takes care of fetching images from the network and caching |
| // them. Has a read-only mode which doesn't perform write operations on the |
| // cache. |
| class CachedImageFetcher : public ImageFetcher { |
| public: |
| CachedImageFetcher(std::unique_ptr<ImageFetcher> image_fetcher, |
| scoped_refptr<ImageCache> image_cache, |
| bool read_only); |
| ~CachedImageFetcher() override; |
| |
| // ImageFetcher: |
| void SetDataUseServiceName(DataUseServiceName data_use_service_name) override; |
| void SetDesiredImageFrameSize(const gfx::Size& size) override; |
| void SetImageDownloadLimit( |
| base::Optional<int64_t> max_download_bytes) override; |
| void FetchImageAndData( |
| const std::string& id, |
| const GURL& image_url, |
| ImageDataFetcherCallback image_data_callback, |
| ImageFetcherCallback image_callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation) override; |
| ImageDecoder* GetImageDecoder() override; |
| |
| private: |
| // Cache |
| void OnImageFetchedFromCache( |
| base::Time start_time, |
| const gfx::Size& size, |
| const std::string& id, |
| const GURL& image_url, |
| ImageDataFetcherCallback image_data_callback, |
| ImageFetcherCallback image_callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation, |
| std::string image_data); |
| void OnImageDecodedFromCache( |
| base::Time start_time, |
| const gfx::Size& size, |
| const std::string& id, |
| const GURL& image_url, |
| ImageDataFetcherCallback image_data_callback, |
| ImageFetcherCallback image_callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation, |
| const std::string& image_data, |
| const gfx::Image& image); |
| |
| // Network |
| void EnqueueFetchImageFromNetwork( |
| bool cache_hit, |
| base::Time start_time, |
| const gfx::Size& size, |
| const std::string& id, |
| const GURL& image_url, |
| ImageDataFetcherCallback image_data_callback, |
| ImageFetcherCallback image_callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation); |
| void FetchImageFromNetwork( |
| bool cache_hit, |
| base::Time start_time, |
| const gfx::Size& size, |
| const std::string& id, |
| const GURL& image_url, |
| ImageDataFetcherCallback image_data_callback, |
| ImageFetcherCallback image_callback, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation); |
| void OnImageFetchedFromNetwork(bool cache_hit, |
| base::Time start_time, |
| ImageFetcherCallback image_callback, |
| const GURL& image_url, |
| const std::string& id, |
| const gfx::Image& image, |
| const RequestMetadata& request_metadata); |
| void DecodeDataForCaching(ImageDataFetcherCallback image_data_callback, |
| const GURL& image_url, |
| const std::string& image_data, |
| const RequestMetadata& request_metadata); |
| void StartEncodingDataAndCache(const GURL& image_url, |
| const gfx::Image& image); |
| void StoreEncodedData(const GURL& image_url, std::string image_data); |
| |
| // Whether the ImageChache is allowed to be modified in any way from requests |
| // made by this CachedImageFetcher. This includes updating last used times, |
| // writing new data to the cache, or cleaning up unreadable data. Note that |
| // the ImageCache may still decide to perform eviction/reconciliation even |
| // when only read only CachedImageFetchers are using it. |
| std::unique_ptr<ImageFetcher> image_fetcher_; |
| |
| scoped_refptr<ImageCache> image_cache_; |
| |
| // When true, operations won't affect the longeivity of valid cache items. |
| bool read_only_; |
| |
| gfx::Size desired_image_frame_size_; |
| |
| base::WeakPtrFactory<CachedImageFetcher> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CachedImageFetcher); |
| }; |
| |
| } // namespace image_fetcher |
| |
| #endif // COMPONENTS_IMAGE_FETCHER_CORE_CACHED_IMAGE_FETCHER_H_ |