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// Copyright (c) 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 ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_
#define ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_
#include <string>
#include "base/containers/hash_tables.h"
#include "content/public/browser/web_contents_observer.h"
#include "url/gurl.h"
class SkBitmap;
namespace content {
struct FaviconURL;
}
namespace gfx {
class Size;
}
namespace android_webview {
// A helper that observes favicon changes for Webview.
class IconHelper : public content::WebContentsObserver {
public:
class Listener {
public:
virtual bool ShouldDownloadFavicon(const GURL& icon_url) = 0;
virtual void OnReceivedIcon(const GURL& icon_url,
const SkBitmap& bitmap) = 0;
virtual void OnReceivedTouchIconUrl(const std::string& url,
const bool precomposed) = 0;
protected:
virtual ~Listener() {}
};
explicit IconHelper(content::WebContents* web_contents);
~IconHelper() override;
void SetListener(Listener* listener);
// From WebContentsObserver
void DidUpdateFaviconURL(
const std::vector<content::FaviconURL>& candidates) override;
void DidStartNavigationToPendingEntry(
const GURL& url,
content::NavigationController::ReloadType reload_type) override;
void DownloadFaviconCallback(
int id,
int http_status_code,
const GURL& image_url,
const std::vector<SkBitmap>& bitmaps,
const std::vector<gfx::Size>& original_bitmap_sizes);
private:
void MarkUnableToDownloadFavicon(const GURL& icon_url);
bool WasUnableToDownloadFavicon(const GURL& icon_url) const;
void ClearUnableToDownloadFavicons();
Listener* listener_;
typedef uint32 MissingFaviconURLHash;
base::hash_set<MissingFaviconURLHash> missing_favicon_urls_;
DISALLOW_COPY_AND_ASSIGN(IconHelper);
};
} // namespace android_webview
#endif // ANDROID_WEBVIEW_BROWSER_ICON_HELPER_H_
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