// 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.

module blink.mojom;

import "mojo/public/mojom/base/time.mojom";

// Implementation of the proposed "Idle Detection API".
//
// Proposal: https://github.com/inexorabletash/idle-detection

enum UserIdleState {
  kActive,
  kIdle
};

enum ScreenIdleState {
  kLocked,
  kUnlocked
};

enum IdleManagerError {
  kSuccess,
  kPermissionDisabled,
};

struct IdleState {
  UserIdleState user;
  ScreenIdleState screen;
};

interface IdleMonitor {
  Update(IdleState state);
};

interface IdleManager {
  // Register an IdleMonitor instance. When registered, it will return the
  // initial state. It will be notified by calls to Update() per the threshold
  // registered for this instance. It can be unregistered by simply closing
  // the pipe.
  AddMonitor(mojo_base.mojom.TimeDelta threshold,
             pending_remote<IdleMonitor> monitor)
      => (IdleManagerError error, IdleState? state);
};