osu/osu.Game/Screens/Play/Player.cs

// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using osu.Framework.Allocation;
using osu.Framework.Audio;
using osu.Framework.Audio.Track;
using osu.Framework.Extensions.IEnumerableExtensions;
using osu.Framework.Graphics;
using osu.Framework.Timing;
using osu.Game.Database;
using osu.Game.Modes;
using osu.Game.Modes.Objects.Drawables;
using osu.Game.Screens.Backgrounds;
using OpenTK;
using osu.Framework.Screens;
using osu.Game.Modes.UI;
using osu.Game.Screens.Ranking;
using osu.Game.Configuration;
using osu.Game.Overlays.Pause;
using osu.Framework.Configuration;
using System;
using System.Collections.Generic;
using System.Linq;
using OpenTK.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Transforms;
using osu.Framework.Input;
using osu.Framework.Logging;
using osu.Framework.Input;
using osu.Game.Graphics.Cursor;
using osu.Game.Input.Handlers;

namespace osu.Game.Screens.Play
{
    public class Player : OsuScreen
    {
        public bool Autoplay;

        protected override BackgroundScreen CreateBackground() => new BackgroundScreenBeatmap(Beatmap);

        internal override bool ShowOverlays => false;

        public BeatmapInfo BeatmapInfo;

        public PlayMode PreferredPlayMode;

        private bool isPaused;
        public bool IsPaused
        {
            get
            {
                return isPaused;
            }
        }

        public int RestartCount;

        private double pauseCooldown = 1000;
        private double lastPauseActionTime = 0;

        private bool canPause => Time.Current >= (lastPauseActionTime + pauseCooldown);

        private IAdjustableClock sourceClock;
        private IFrameBasedClock interpolatedSourceClock;

        private Ruleset ruleset;

        private ScoreProcessor scoreProcessor;
        private HitRenderer hitRenderer;
        private Bindable<int> dimLevel;
        private SkipButton skipButton;

        private ScoreOverlay scoreOverlay;
        private PauseOverlay pauseOverlay;

        [BackgroundDependencyLoader]
        private void load(AudioManager audio, BeatmapDatabase beatmaps, OsuGameBase game, OsuConfigManager config)
        {
            dimLevel = config.GetBindable<int>(OsuConfig.DimLevel);
            mouseWheelDisabled = config.GetBindable<bool>(OsuConfig.MouseDisableWheel);

            try
            {
                if (Beatmap == null)
                    Beatmap = beatmaps.GetWorkingBeatmap(BeatmapInfo, withStoryboard: true);

                if ((Beatmap?.Beatmap?.HitObjects.Count ?? 0) == 0)
                    throw new Exception("No valid objects were found!");
            }
            catch (Exception e)
            {
                Logger.Log($"Could not load this beatmap sucessfully ({e})!", LoggingTarget.Runtime, LogLevel.Error);

                //couldn't load, hard abort!
                Exit();
                return;
            }

            Track track = Beatmap.Track;

            if (track != null)
            {
                audio.Track.SetExclusive(track);
                sourceClock = track;
            }

            sourceClock = (IAdjustableClock)track ?? new StopwatchClock();
            interpolatedSourceClock = new InterpolatingFramedClock(sourceClock);

            Schedule(() =>
            {
                sourceClock.Reset();
            });

            var beatmap = Beatmap.Beatmap;

            if (beatmap.BeatmapInfo?.Mode > PlayMode.Osu)
            {
                //we only support osu! mode for now because the hitobject parsing is crappy and needs a refactor.
                Exit();
                return;
            }

            PlayMode usablePlayMode = beatmap.BeatmapInfo?.Mode > PlayMode.Osu ? beatmap.BeatmapInfo.Mode : PreferredPlayMode;

            ruleset = Ruleset.GetRuleset(usablePlayMode);

            scoreOverlay = ruleset.CreateScoreOverlay();
            scoreOverlay.BindProcessor(scoreProcessor = ruleset.CreateScoreProcessor(beatmap.HitObjects.Count));

            pauseOverlay = new PauseOverlay
            {
                Depth = -1,
                OnResume = delegate
                {
                    Delay(400);
                    Schedule(Resume);
                },
                OnRetry = Restart,
                OnQuit = Exit
            };

            hitRenderer = ruleset.CreateHitRendererWith(beatmap, new PlayerInputManager
            {
                ReplayInputHandler = new LegacyReplayInputHandler(new List<LegacyReplayInputHandler.LegacyReplayFrame>
                {
                    new LegacyReplayInputHandler.LegacyReplayFrame(0, 0, 0, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(500, 512, 0, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(1000, 512, 384, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(1500, 0, 384, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(2000, 0, 0, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(2500, 512, 0, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(3000, 512, 384, LegacyReplayInputHandler.LegacyButtonState.None),
                    new LegacyReplayInputHandler.LegacyReplayFrame(3500, 0, 384, LegacyReplayInputHandler.LegacyButtonState.None),
                })
            });

            //bind HitRenderer to ScoreProcessor and ourselves (for a pass situation)
            hitRenderer.OnJudgement += scoreProcessor.AddJudgement;
            hitRenderer.OnAllJudged += onPass;

            //bind ScoreProcessor to ourselves (for a fail situation)
            scoreProcessor.Failed += onFail;

            if (Autoplay)
                hitRenderer.Schedule(() => hitRenderer.DrawableObjects.ForEach(h => h.State = ArmedState.Hit));

            Children = new Drawable[]
            {
                new Container
                {
                    RelativeSizeAxes = Axes.Both,
                    Clock = interpolatedSourceClock,
                    Children = new Drawable[]
                    {
                        hitRenderer,
                        skipButton = new SkipButton
                        {
                            Alpha = 0
                        },
                    }
                },
                scoreOverlay,
                pauseOverlay
            };
        }

        private void initializeSkipButton()
        {
            const double skip_required_cutoff = 3000;
            const double fade_time = 300;

            double firstHitObject = Beatmap.Beatmap.HitObjects.First().StartTime;

            if (firstHitObject < skip_required_cutoff)
            {
                skipButton.Alpha = 0;
                skipButton.Expire();
                return;
            }

            skipButton.FadeInFromZero(fade_time);

            skipButton.Action = () =>
            {
                sourceClock.Seek(firstHitObject - skip_required_cutoff - fade_time);
                skipButton.Action = null;
            };

            skipButton.Delay(firstHitObject - skip_required_cutoff - fade_time);
            skipButton.FadeOut(fade_time);
            skipButton.Expire();
        }

        public void Pause(bool force = false)
        {
            if (canPause || force)
            {
                lastPauseActionTime = Time.Current;
                scoreOverlay.KeyCounter.IsCounting = false;
                pauseOverlay.Retries = RestartCount;
                pauseOverlay.Show();
                sourceClock.Stop();
                isPaused = true;
            }
            else
            {
                isPaused = false;
            }
        }

        public void Resume()
        {
            lastPauseActionTime = Time.Current;
            scoreOverlay.KeyCounter.IsCounting = true;
            pauseOverlay.Hide();
            sourceClock.Start();
            isPaused = false;
        }

        public void TogglePaused()
        {
            isPaused = !IsPaused;
            if (IsPaused) Pause(); else Resume();
        }

        public void Restart()
        {
            sourceClock.Stop(); // If the clock is running and Restart is called the game will lag until relaunch

            var newPlayer = new Player();

            newPlayer.LoadAsync(Game, delegate
            {
                newPlayer.RestartCount = RestartCount + 1;
                ValidForResume = false;

                if (!Push(newPlayer))
                {
                // Error(?)
            }
            });
        }

        private void onPass()
        {
            Delay(1000);
            Schedule(delegate
            {
                ValidForResume = false;
                Push(new Results
                {
                    Score = scoreProcessor.GetScore()
                });
            });
        }

        private void onFail()
        {
            Content.FadeColour(Color4.Red, 500);
            sourceClock.Stop();

            Delay(500);
            Schedule(delegate
            {
                ValidForResume = false;
                Push(new FailDialog());
            });
        }

        protected override void OnEntering(Screen last)
        {
            base.OnEntering(last);

            (Background as BackgroundScreenBeatmap)?.BlurTo(Vector2.Zero, 1500, EasingTypes.OutQuint);
            Background?.FadeTo((100f - dimLevel) / 100, 1500, EasingTypes.OutQuint);

            Content.Alpha = 0;
            dimLevel.ValueChanged += dimChanged;

            Content.ScaleTo(0.7f);

            Content.Delay(250);
            Content.FadeIn(250);

            Content.ScaleTo(1, 750, EasingTypes.OutQuint);

            Delay(750);
            Schedule(() =>
            {
                sourceClock.Start();
                initializeSkipButton();
            });
        }

        protected override void OnSuspending(Screen next)
        {
            Content.FadeOut(350);
            Content.ScaleTo(0.7f, 750, EasingTypes.InQuint);

            base.OnSuspending(next);
        }

        protected override bool OnExiting(Screen next)
        {
            if (pauseOverlay == null) return false;

            if (pauseOverlay.State != Visibility.Visible && !canPause) return true;

            if (!IsPaused && sourceClock.IsRunning) // For if the user presses escape quickly when entering the map
            {
                Pause();
                return true;
            }
            else
            {
                FadeOut(250);
                Content.ScaleTo(0.7f, 750, EasingTypes.InQuint);

                dimLevel.ValueChanged -= dimChanged;
                Background?.FadeTo(1f, 200);
                return base.OnExiting(next);
            }
        }

        private void dimChanged(object sender, EventArgs e)
        {
            Background?.FadeTo((100f - dimLevel) / 100, 800);
        }

        private Bindable<bool> mouseWheelDisabled;

        protected override bool OnWheel(InputState state) => mouseWheelDisabled.Value && !isPaused;
    }
}