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. 16 class 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
