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- // Copyright 2018 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 ASH_SERVICES_MULTIDEVICE_SETUP_HOST_STATUS_PROVIDER_H_
- #define ASH_SERVICES_MULTIDEVICE_SETUP_HOST_STATUS_PROVIDER_H_
- #include "ash/components/multidevice/remote_device_ref.h"
- #include "ash/services/multidevice_setup/public/mojom/multidevice_setup.mojom.h"
- #include "base/observer_list.h"
- #include "third_party/abseil-cpp/absl/types/optional.h"
- namespace ash {
- namespace multidevice_setup {
- // Provides the status of the current MultiDevice host, if it exists.
- // Additionally, provides an observer interface for being notified when the host
- // status changes.
- class HostStatusProvider {
- public:
- class HostStatusWithDevice {
- public:
- HostStatusWithDevice(
- mojom::HostStatus host_status,
- const absl::optional<multidevice::RemoteDeviceRef>& host_device);
- HostStatusWithDevice(const HostStatusWithDevice& other);
- ~HostStatusWithDevice();
- bool operator==(const HostStatusWithDevice& other) const;
- bool operator!=(const HostStatusWithDevice& other) const;
- mojom::HostStatus host_status() const { return host_status_; }
- // If host_status() is kNoEligibleHosts or
- // kEligibleHostExistsButNoHostSet, host_device() is null.
- const absl::optional<multidevice::RemoteDeviceRef>& host_device() const {
- return host_device_;
- }
- private:
- mojom::HostStatus host_status_;
- absl::optional<multidevice::RemoteDeviceRef> host_device_;
- };
- class Observer {
- public:
- virtual ~Observer() = default;
- virtual void OnHostStatusChange(
- const HostStatusWithDevice& host_status_with_device) = 0;
- };
- HostStatusProvider(const HostStatusProvider&) = delete;
- HostStatusProvider& operator=(const HostStatusProvider&) = delete;
- virtual ~HostStatusProvider();
- virtual HostStatusWithDevice GetHostWithStatus() const = 0;
- void AddObserver(Observer* observer);
- void RemoveObserver(Observer* observer);
- protected:
- HostStatusProvider();
- void NotifyHostStatusChange(
- mojom::HostStatus host_status,
- const absl::optional<multidevice::RemoteDeviceRef>& host_device);
- private:
- base::ObserverList<Observer>::Unchecked observer_list_;
- };
- } // namespace multidevice_setup
- } // namespace ash
- #endif // ASH_SERVICES_MULTIDEVICE_SETUP_HOST_STATUS_PROVIDER_H_
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