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// Copyright 2020 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 WEBLAYER_BROWSER_BROWSER_LIST_H_
#define WEBLAYER_BROWSER_BROWSER_LIST_H_
#include "base/containers/flat_set.h"
#include "base/no_destructor.h"
#include "base/observer_list.h"
#include "build/build_config.h"
namespace weblayer {
class BrowserImpl;
class BrowserListObserver;
#if defined(OS_ANDROID)
class BrowserListProxy;
#endif
// Tracks the set of browsers.
class BrowserList {
public:
BrowserList(const BrowserList&) = delete;
BrowserList& operator=(const BrowserList&) = delete;
static BrowserList* GetInstance();
const base::flat_set<BrowserImpl*>& browsers() { return browsers_; }
#if defined(OS_ANDROID)
// Returns true if there is at least one Browser in a resumed state.
bool HasAtLeastOneResumedBrowser();
#endif
void AddObserver(BrowserListObserver* observer);
void RemoveObserver(BrowserListObserver* observer);
private:
friend class BrowserImpl;
friend class base::NoDestructor<BrowserList>;
BrowserList();
~BrowserList();
void AddBrowser(BrowserImpl* browser);
void RemoveBrowser(BrowserImpl* browser);
#if defined(OS_ANDROID)
void NotifyHasAtLeastOneResumedBrowserChanged();
#endif
base::flat_set<BrowserImpl*> browsers_;
base::ObserverList<BrowserListObserver> observers_;
#if defined(OS_ANDROID)
std::unique_ptr<BrowserListProxy> browser_list_proxy_;
#endif
};
} // namespace weblayer
#endif // WEBLAYER_BROWSER_BROWSER_LIST_H_
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