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// 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_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
#define CHROME_BROWSER_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
#include <map>
#include <utility>
#include <vector>
#include "base/callback.h"
#include "base/macros.h"
#include "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
#include "components/suggestions/image_fetcher.h"
#include "ui/gfx/image/image_skia.h"
#include "url/gurl.h"
namespace net {
class URLRequestContextGetter;
}
namespace suggestions {
// A class used to fetch server images. It can be called from any thread and the
// callback will be called on the thread which initiated the fetch.
class ImageFetcherImpl : public ImageFetcher,
public chrome::BitmapFetcherDelegate {
public:
explicit ImageFetcherImpl(net::URLRequestContextGetter* url_request_context);
~ImageFetcherImpl() override;
void SetImageFetcherDelegate(ImageFetcherDelegate* delegate) override;
void StartOrQueueNetworkRequest(
const GURL& url,
const GURL& image_url,
base::Callback<void(const GURL&, const SkBitmap*)> callback) override;
private:
// Inherited from BitmapFetcherDelegate.
void OnFetchComplete(const GURL& image_url, const SkBitmap* bitmap) override;
typedef std::vector<base::Callback<void(const GURL&, const SkBitmap*)> >
CallbackVector;
// State related to an image fetch (associated website url, image_url,
// fetcher, pending callbacks).
struct ImageRequest {
ImageRequest();
// Struct takes ownership of |f|.
explicit ImageRequest(chrome::BitmapFetcher* f);
~ImageRequest();
void swap(ImageRequest* other) {
std::swap(url, other->url);
std::swap(image_url, other->image_url);
std::swap(callbacks, other->callbacks);
std::swap(fetcher, other->fetcher);
}
GURL url;
GURL image_url;
chrome::BitmapFetcher* fetcher;
// Queue for pending callbacks, which may accumulate while the request is in
// flight.
CallbackVector callbacks;
};
typedef std::map<const GURL, ImageRequest> ImageRequestMap;
// Map from each image URL to the request information (associated website
// url, fetcher, pending callbacks).
ImageRequestMap pending_net_requests_;
ImageFetcherDelegate* delegate_;
net::URLRequestContextGetter* url_request_context_;
DISALLOW_COPY_AND_ASSIGN(ImageFetcherImpl);
};
} // namespace suggestions
#endif // CHROME_BROWSER_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
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