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// Copyright 2019 The Chromium Authors
// 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/functional/callback.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(const BrowserActivityWatcher&) = delete;
BrowserActivityWatcher& operator=(const BrowserActivityWatcher&) = delete;
~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_;
};
#endif // CHROME_BROWSER_METRICS_BROWSER_ACTIVITY_WATCHER_H_
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