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// Copyright 2012 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_UI_BROWSER_LIST_OBSERVER_H_
#define CHROME_BROWSER_UI_BROWSER_LIST_OBSERVER_H_
#include "base/observer_list_types.h"
#include "build/build_config.h"
#if BUILDFLAG(IS_ANDROID)
#error This file should only be included on desktop.
#endif
class Browser;
enum class BrowserClosingStatus;
class BrowserListObserver : public base::CheckedObserver {
public:
// Called immediately after a browser is added to the list.
virtual void OnBrowserAdded(Browser* browser) {}
// Called when code attempted to close `browser`, but failed due to `reason`.
virtual void OnBrowserCloseCancelled(Browser* browser,
BrowserClosingStatus reason) {}
// Called when a Browser starts closing. This is called prior to
// removing the tabs. Removing the tabs may delay or stop the close.
virtual void OnBrowserClosing(Browser* browser) {}
// Called immediately after a browser is removed from the list.
virtual void OnBrowserRemoved(Browser* browser) {}
// Called immediately after a browser is set active (SetLastActive).
virtual void OnBrowserSetLastActive(Browser* browser) {}
// Called immediately after a browser becomes not active.
virtual void OnBrowserNoLongerActive(Browser* browser) {}
};
#endif // CHROME_BROWSER_UI_BROWSER_LIST_OBSERVER_H_
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