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| 1 // Copyright (c) 2010 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_USER_STYLE_SHEET_WATCHER_H_ |
| 6 #define CHROME_BROWSER_USER_STYLE_SHEET_WATCHER_H_ |
| 7 |
| 8 #include "base/file_path.h" |
| 9 #include "base/logging.h" |
| 10 #include "base/ref_counted.h" |
| 11 #include "chrome/browser/chrome_thread.h" |
| 12 #include "chrome/common/notification_observer.h" |
| 13 #include "chrome/common/notification_registrar.h" |
| 14 #include "googleurl/src/gurl.h" |
| 15 |
| 16 // This loads the user style sheet on the file thread and sends a notification |
| 17 // when the style sheet is loaded. |
| 18 // TODO(tony): Watch for file changes and send a notification of the update. |
| 19 class UserStyleSheetWatcher |
| 20 : public base::RefCountedThreadSafe<UserStyleSheetWatcher, |
| 21 ChromeThread::DeleteOnUIThread>, |
| 22 public NotificationObserver { |
| 23 public: |
| 24 explicit UserStyleSheetWatcher(const FilePath& profile_path); |
| 25 virtual ~UserStyleSheetWatcher() {} |
| 26 |
| 27 void Init(); |
| 28 |
| 29 GURL user_style_sheet() const { |
| 30 return user_style_sheet_; |
| 31 } |
| 32 |
| 33 // NotificationObserver interface |
| 34 virtual void Observe(NotificationType type, |
| 35 const NotificationSource& source, |
| 36 const NotificationDetails& details); |
| 37 |
| 38 private: |
| 39 // Load the user style sheet on the file thread and convert it to a |
| 40 // base64 URL. Posts the base64 URL back to the UI thread. |
| 41 void LoadStyleSheet(const FilePath& profile_path); |
| 42 |
| 43 void SetStyleSheet(const GURL& url); |
| 44 |
| 45 // The directory containing the User StyleSheet. |
| 46 FilePath profile_path_; |
| 47 |
| 48 // The user style sheet as a base64 data:// URL. |
| 49 GURL user_style_sheet_; |
| 50 |
| 51 NotificationRegistrar registrar_; |
| 52 bool has_loaded_; |
| 53 |
| 54 DISALLOW_COPY_AND_ASSIGN(UserStyleSheetWatcher); |
| 55 }; |
| 56 |
| 57 #endif // CHROME_BROWSER_USER_STYLE_SHEET_WATCHER_H_ |
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