| // Copyright 2019 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_METRICS_BROWSER_ACTIVITY_WATCHER_H_ |
| #define CHROME_BROWSER_METRICS_BROWSER_ACTIVITY_WATCHER_H_ |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "chrome/browser/ui/browser_list_observer.h" |
| #include "chrome/browser/ui/tabs/tab_strip_model_observer.h" |
| |
| // Helper that fires a callback every time a Browser object is added or removed |
| // from the BrowserList, or a browser's tab strip model is modified. This class |
| // primarily exists to encapsulate this behavior and reduce the number of |
| // platform-specific macros as Android doesn't use BrowserList or TabStripModel. |
| class BrowserActivityWatcher : public BrowserListObserver, |
| public TabStripModelObserver { |
| public: |
| explicit BrowserActivityWatcher( |
| const base::RepeatingClosure& on_browser_activity); |
| ~BrowserActivityWatcher() override; |
| |
| // BrowserListObserver: |
| void OnBrowserAdded(Browser* browser) override; |
| void OnBrowserRemoved(Browser* browser) override; |
| |
| // TabStripModelObserver: |
| void OnTabStripModelChanged( |
| TabStripModel* tab_strip_model, |
| const TabStripModelChange& change, |
| const TabStripSelectionChange& selection) override; |
| |
| private: |
| base::RepeatingClosure on_browser_activity_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BrowserActivityWatcher); |
| }; |
| |
| #endif // CHROME_BROWSER_METRICS_BROWSER_ACTIVITY_WATCHER_H_ |