blob: 22b65f4ad3600d9bf240b18c22e91c06315ec79c [file] [log] [blame]
// 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.
#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 {
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;
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_;