1 // Copyright (c) 2011 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 CONTENT_COMMON_FONT_LIST_H_ 6 #define CONTENT_COMMON_FONT_LIST_H_ 7 8 #include "base/memory/scoped_ptr.h" 9 10 namespace base { 11 class ListValue; 12 } 13 14 namespace content { 15 16 // Getting the list of fonts on the system is non-threadsafe on Linux for 17 // versions of Pango predating 2013. This sequence token can be used to enforce 18 // serial execution of get font list tasks. 19 extern const char kFontListSequenceToken[]; 20 21 // Retrieves the fonts available on the current platform and returns them. 22 // The caller will own the returned pointer. Each entry will be a list of 23 // two strings, the first being the font family, and the second being the 24 // localized name. 25 // 26 // This function is potentially slow (the system may do a bunch of I/O) so be 27 // sure not to call this on a time-critical thread like the UI or I/O threads. 28 // 29 // Since getting the fonts is not threadsafe on Linux, use 30 // |kFontListSequenceToken| to prevent race conditions. 31 // 32 // Most callers will want to use the GetFontListAsync function in 33 // content/browser/font_list_async.h which does an asynchronous call. 34 scoped_ptr<base::ListValue> GetFontList_SlowBlocking(); 35 36 } // namespace content 37 38 #endif // CONTENT_COMMON_FONT_LIST_H_ 39