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// Copyright 2013 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_EXTENSIONS_FAVICON_DOWNLOADER_H_
#define CHROME_BROWSER_EXTENSIONS_FAVICON_DOWNLOADER_H_
#include <map>
#include <set>
#include <vector>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "content/public/browser/web_contents_observer.h"
class SkBitmap;
namespace content {
struct FaviconURL;
}
namespace gfx {
class Size;
}
// Class to help download all favicons for a tab.
class FaviconDownloader : public content::WebContentsObserver {
public:
typedef std::map<GURL, std::vector<SkBitmap> > FaviconMap;
typedef base::Callback<void(
bool, /* success */
/* A map of icon urls to the bitmaps provided by that url. */
const FaviconMap&)>
FaviconDownloaderCallback;
// |extra_favicon_urls| allows callers to provide icon urls that aren't
// provided by the renderer (e.g touch icons on non-android environments).
// |skip_page_favicons| instructs the downloader to not query the page
// for favicons (e.g. when a favicon URL has already been provided in
// |extra_favicon_urls|).
FaviconDownloader(content::WebContents* web_contents,
const std::vector<GURL>& extra_favicon_urls,
FaviconDownloaderCallback callback);
~FaviconDownloader() override;
void SkipPageFavicons();
void Start();
private:
friend class TestFaviconDownloader;
// Initiates a download of the image at |url| and returns the download id.
// This is overridden in testing.
virtual int DownloadImage(const GURL& url);
// Queries FaviconDriver for the page's current favicon URLs.
// This is overridden in testing.
virtual std::vector<content::FaviconURL> GetFaviconURLsFromWebContents();
// Fetches icons for the given urls.
// |callback_| is run when all downloads complete.
void FetchIcons(const std::vector<content::FaviconURL>& favicon_urls);
void FetchIcons(const std::vector<GURL>& urls);
// Icon download callback.
void DidDownloadFavicon(int id,
int http_status_code,
const GURL& image_url,
const std::vector<SkBitmap>& bitmaps,
const std::vector<gfx::Size>& original_bitmap_sizes);
// content::WebContentsObserver overrides:
void DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) override;
void DidUpdateFaviconURL(
const std::vector<content::FaviconURL>& candidates) override;
// Whether we need to fetch favicons from the renderer.
bool need_favicon_urls_;
// URLs that aren't given by WebContentsObserver::DidUpdateFaviconURL() that
// should be used for this favicon. This is necessary in order to get touch
// icons on non-android environments.
std::vector<GURL> extra_favicon_urls_;
// The icons which were downloaded. Populated by FetchIcons().
FaviconMap favicon_map_;
// Request ids of in-progress requests.
std::set<int> in_progress_requests_;
// Urls for which a download has already been initiated. Used to prevent
// duplicate downloads of the same url.
std::set<GURL> processed_urls_;
// Callback to run on favicon download completion.
FaviconDownloaderCallback callback_;
base::WeakPtrFactory<FaviconDownloader> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(FaviconDownloader);
};
#endif // CHROME_BROWSER_EXTENSIONS_FAVICON_DOWNLOADER_H_
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