| // 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 "base/memory/scoped_ptr.h" |
| #include "chrome/browser/bitmap_fetcher/bitmap_fetcher_delegate.h" |
| #include "chrome/browser/image_decoder.h" |
| #include "net/url_request/url_fetcher_delegate.h" |
| #include "net/url_request/url_request.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "url/gurl.h" |
| |
| namespace net { |
| class URLFetcher; |
| class URLRequestContextGetter; |
| } // namespace net |
| |
| namespace chrome { |
| |
| // Asynchrounously fetches an image from the given URL and returns the |
| // decoded Bitmap to the provided BitmapFetcherDelegate. |
| class BitmapFetcher : public net::URLFetcherDelegate, |
| public ImageDecoder::ImageRequest { |
| public: |
| BitmapFetcher(const GURL& url, BitmapFetcherDelegate* delegate); |
| ~BitmapFetcher() override; |
| |
| const GURL& url() const { return url_; } |
| net::URLFetcher* url_fetcher() { return url_fetcher_.get(); } |
| |
| // 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(net::URLRequestContextGetter* request_context, |
| 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(); |
| |
| // Methods inherited from URLFetcherDelegate |
| |
| // This will be called when the URL has been fetched, successfully or not. |
| // Use accessor methods on |source| to get the results. |
| void OnURLFetchComplete(const net::URLFetcher* source) override; |
| |
| // This will be called when some part of the response is read. |current| |
| // denotes the number of bytes received up to the call, and |total| is the |
| // expected total size of the response (or -1 if not determined). |
| void OnURLFetchDownloadProgress(const net::URLFetcher* source, |
| int64 current, |
| int64 total) override; |
| |
| // 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: |
| // Alerts the delegate that a failure occurred. |
| void ReportFailure(); |
| |
| scoped_ptr<net::URLFetcher> url_fetcher_; |
| const GURL url_; |
| BitmapFetcherDelegate* const delegate_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BitmapFetcher); |
| }; |
| |
| } // namespace chrome |
| |
| #endif // CHROME_BROWSER_BITMAP_FETCHER_BITMAP_FETCHER_H_ |