osu-lazer/osu.Game/Overlays/Mods/ModColumn.cs

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using Humanizer;
using osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Colour;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Game.Graphics;
using osu.Game.Graphics.Containers;
using osu.Game.Rulesets.Mods;
using osu.Game.Utils;
using osuTK;

#nullable enable

namespace osu.Game.Overlays.Mods
{
    public class ModColumn : CompositeDrawable
    {
        private readonly ModType modType;

        private readonly Bindable<Dictionary<ModType, IReadOnlyList<Mod>>> availableMods = new Bindable<Dictionary<ModType, IReadOnlyList<Mod>>>();

        private readonly TextFlowContainer headerText;
        private readonly Box headerBackground;
        private readonly Container contentContainer;
        private readonly Box contentBackground;
        private readonly FillFlowContainer<ModPanel> panelFlow;

        private Colour4 accentColour;

        private const float header_height = 60;

        public ModColumn(ModType modType)
        {
            this.modType = modType;

            Width = 450;
            RelativeSizeAxes = Axes.Y;
            Shear = new Vector2(ModPanel.SHEAR_X, 0);
            CornerRadius = ModPanel.CORNER_RADIUS;
            Masking = true;

            InternalChildren = new Drawable[]
            {
                new Container
                {
                    RelativeSizeAxes = Axes.X,
                    Height = header_height + ModPanel.CORNER_RADIUS,
                    Children = new Drawable[]
                    {
                        headerBackground = new Box
                        {
                            RelativeSizeAxes = Axes.X,
                            Height = header_height + ModPanel.CORNER_RADIUS
                        },
                        headerText = new OsuTextFlowContainer(t =>
                        {
                            t.Font = OsuFont.TorusAlternate.With(size: 24);
                            t.Shadow = false;
                            t.Colour = Colour4.Black;
                        })
                        {
                            RelativeSizeAxes = Axes.X,
                            AutoSizeAxes = Axes.Y,
                            Anchor = Anchor.CentreLeft,
                            Origin = Anchor.CentreLeft,
                            Shear = new Vector2(-ModPanel.SHEAR_X, 0),
                            Padding = new MarginPadding
                            {
                                Horizontal = 15,
                                Bottom = ModPanel.CORNER_RADIUS
                            }
                        }
                    }
                },
                new Container
                {
                    RelativeSizeAxes = Axes.Both,
                    Padding = new MarginPadding { Top = header_height },
                    Child = contentContainer = new Container
                    {
                        RelativeSizeAxes = Axes.Both,
                        Masking = true,
                        CornerRadius = ModPanel.CORNER_RADIUS,
                        BorderThickness = 4,
                        Children = new Drawable[]
                        {
                            contentBackground = new Box
                            {
                                RelativeSizeAxes = Axes.Both
                            },
                            new GridContainer
                            {
                                RelativeSizeAxes = Axes.Both,
                                RowDimensions = new[]
                                {
                                    new Dimension(GridSizeMode.Absolute, 50),
                                    new Dimension(),
                                    new Dimension(GridSizeMode.Absolute, 10)
                                },
                                Content = new[]
                                {
                                    new[]
                                    {
                                        Empty()
                                    },
                                    new Drawable[]
                                    {
                                        new OsuScrollContainer
                                        {
                                            RelativeSizeAxes = Axes.Both,
                                            ScrollbarOverlapsContent = false,
                                            Child = panelFlow = new FillFlowContainer<ModPanel>
                                            {
                                                RelativeSizeAxes = Axes.X,
                                                AutoSizeAxes = Axes.Y,
                                                Spacing = new Vector2(0, 10),
                                                Padding = new MarginPadding
                                                {
                                                    Horizontal = 10
                                                },
                                            }
                                        }
                                    },
                                    new[] { Empty() }
                                }
                            }
                        }
                    }
                }
            };

            createHeaderText();
        }

        private void createHeaderText()
        {
            IEnumerable<string> headerTextWords = modType.Humanize(LetterCasing.Title).Split(' ');

            if (headerTextWords.Count() > 1)
            {
                headerText.AddText($"{headerTextWords.First()} ", t => t.Font = t.Font.With(weight: FontWeight.SemiBold));
                headerTextWords = headerTextWords.Skip(1);
            }

            headerText.AddText(string.Join(' ', headerTextWords));
        }

        [BackgroundDependencyLoader]
        private void load(OsuGameBase game, OverlayColourProvider colourProvider, OsuColour colours)
        {
            availableMods.BindTo(game.AvailableMods);

            headerBackground.Colour = accentColour = colours.ForModType(modType);

            contentContainer.BorderColour = ColourInfo.GradientVertical(colourProvider.Background4, colourProvider.Background3);
            contentBackground.Colour = colourProvider.Background4;
        }

        protected override void LoadComplete()
        {
            base.LoadComplete();
            availableMods.BindValueChanged(_ => Scheduler.AddOnce(updateMods), true);
        }

        private CancellationTokenSource? cancellationTokenSource;

        private void updateMods()
        {
            var newMods = ModUtils.FlattenMods(availableMods.Value.GetValueOrDefault(modType) ?? Array.Empty<Mod>()).ToList();

            if (newMods.SequenceEqual(panelFlow.Children.Select(p => p.Mod)))
                return;

            cancellationTokenSource?.Cancel();

            var panels = newMods.Select(mod => new ModPanel(mod)
            {
                Shear = new Vector2(-ModPanel.SHEAR_X, 0)
            });

            LoadComponentsAsync(panels, loaded =>
            {
                panelFlow.ChildrenEnumerable = loaded;
            }, (cancellationTokenSource = new CancellationTokenSource()).Token);
        }
    }
}