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// Copyright (c) 2012 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_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_
#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_
#include <string>
#include "base/callback.h"
#include "base/file_path.h"
#include "chrome/browser/icon_loader.h"
// Helper class for DownloadsGetFileIconFunction. Only used for a single icon
// extraction.
class DownloadFileIconExtractor {
public:
// Callback for |ExtractIconForPath|. The parameter is a URL as a string for a
// suitable icon. The string could be empty if the icon could not be
// determined.
typedef base::Callback<void(const std::string&)> IconURLCallback;
virtual ~DownloadFileIconExtractor() {}
// Should return false if the request was invalid. If the return value is
// true, then |callback| should be called with the result.
virtual bool ExtractIconURLForPath(const FilePath& path,
IconLoader::IconSize icon_size,
IconURLCallback callback) = 0;
};
#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_
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