| // Copyright 2014 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 CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_ |
| #define CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_ |
| |
| #include <memory> |
| |
| #include "base/callback_forward.h" |
| #include "base/macros.h" |
| #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_delegate.h" |
| #include "chrome/browser/image_decoder.h" |
| #include "net/traffic_annotation/network_traffic_annotation.h" |
| #include "net/url_request/url_request.h" |
| #include "services/network/public/cpp/simple_url_loader.h" |
| #include "services/network/public/mojom/url_loader_factory.mojom.h" |
| #include "url/gurl.h" |
| |
| class SkBitmap; |
| |
| // Asynchrounously fetches an image from the given URL and returns the |
| // decoded Bitmap to the provided BitmapFetcherDelegate. |
| class BitmapFetcher : public ImageDecoder::ImageRequest { |
| public: |
| BitmapFetcher(const GURL& url, |
| BitmapFetcherDelegate* delegate, |
| const net::NetworkTrafficAnnotationTag& traffic_annotation); |
| ~BitmapFetcher() override; |
| |
| const GURL& url() const { return url_; } |
| |
| // Initializes internal fetcher. After this function returns url_fetcher() |
| // can be accessed to configure it further (eg. add user data to request). |
| // All configuration must be done before Start() is called. |
| // Values for |load_flags| are defined in net/base/load_flags.h. In general, |
| // |net::LOAD_NORMAL| is appropriate. Init may be called more than once in |
| // some cases. If so, subsequent starts will be ignored. |
| void Init(const std::string& referrer, |
| net::URLRequest::ReferrerPolicy referrer_policy, |
| int load_flags); |
| |
| // Start fetching the URL with the fetcher. The delegate is notified |
| // asynchronously when done. Start may be called more than once in some |
| // cases. If so, subsequent starts will be ignored since the operation is |
| // already in progress. |
| void Start(network::mojom::URLLoaderFactory* loader_factory); |
| |
| // Methods inherited from ImageDecoder::ImageRequest |
| |
| // Called when image is decoded. |decoder| is used to identify the image in |
| // case of decoding several images simultaneously. This will not be called |
| // on the UI thread. |
| void OnImageDecoded(const SkBitmap& decoded_image) override; |
| |
| // Called when decoding image failed. |
| void OnDecodeImageFailed() override; |
| |
| private: |
| void OnSimpleLoaderComplete(std::unique_ptr<std::string> response_body); |
| |
| // Alerts the delegate that a failure occurred. |
| void ReportFailure(); |
| |
| std::unique_ptr<network::SimpleURLLoader> simple_loader_; |
| |
| const GURL url_; |
| BitmapFetcherDelegate* const delegate_; |
| const net::NetworkTrafficAnnotationTag traffic_annotation_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BitmapFetcher); |
| }; |
| |
| #endif // CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_ |