1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_ 6#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_ 7 8#include <string> 9 10#include "base/callback.h" 11#include "base/files/file_path.h" 12#include "chrome/browser/icon_loader.h" 13 14// Helper class for DownloadsGetFileIconFunction. Only used for a single icon 15// extraction. 16class DownloadFileIconExtractor { 17 public: 18 // Callback for |ExtractIconForPath|. The parameter is a URL as a string for a 19 // suitable icon. The string could be empty if the icon could not be 20 // determined. 21 typedef base::Callback<void(const std::string&)> IconURLCallback; 22 23 virtual ~DownloadFileIconExtractor() {} 24 25 // Should return false if the request was invalid. If the return value is 26 // true, then |callback| should be called with the result. 27 virtual bool ExtractIconURLForPath(const base::FilePath& path, 28 float scale, 29 IconLoader::IconSize icon_size, 30 IconURLCallback callback) = 0; 31}; 32 33#endif // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_ICON_EXTRACTOR_H_ 34