mirror of
https://github.com/ppy/osu
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221 lines
8.0 KiB
C#
221 lines
8.0 KiB
C#
// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
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// See the LICENCE file in the repository root for full licence text.
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#nullable disable
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using osu.Framework.Allocation;
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using osu.Framework.Bindables;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Containers;
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using osu.Game.Graphics.Cursor;
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using osu.Game.Online.Chat;
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using osuTK.Graphics;
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namespace osu.Game.Overlays.Chat
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{
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public partial class DrawableChannel : Container
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{
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public readonly Channel Channel;
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protected FillFlowContainer ChatLineFlow;
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private ChannelScrollContainer scroll;
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private bool scrollbarVisible = true;
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public bool ScrollbarVisible
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{
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set
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{
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if (scrollbarVisible == value) return;
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scrollbarVisible = value;
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if (scroll != null)
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scroll.ScrollbarVisible = value;
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}
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}
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public DrawableChannel(Channel channel)
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{
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Channel = channel;
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RelativeSizeAxes = Axes.Both;
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}
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private Bindable<Message> highlightedMessage;
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[BackgroundDependencyLoader]
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private void load()
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{
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Child = new OsuContextMenuContainer
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{
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RelativeSizeAxes = Axes.Both,
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Masking = true,
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Child = scroll = new ChannelScrollContainer
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{
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ScrollbarVisible = scrollbarVisible,
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RelativeSizeAxes = Axes.Both,
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// Some chat lines have effects that slightly protrude to the bottom,
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// which we do not want to mask away, hence the padding.
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Padding = new MarginPadding { Bottom = 5 },
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Child = ChatLineFlow = new FillFlowContainer
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{
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Padding = new MarginPadding { Horizontal = 10 },
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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Direction = FillDirection.Vertical,
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}
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},
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};
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newMessagesArrived(Channel.Messages);
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Channel.NewMessagesArrived += newMessagesArrived;
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Channel.MessageRemoved += messageRemoved;
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Channel.PendingMessageResolved += pendingMessageResolved;
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}
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protected override void LoadComplete()
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{
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base.LoadComplete();
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highlightedMessage = Channel.HighlightedMessage.GetBoundCopy();
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highlightedMessage.BindValueChanged(_ => processMessageHighlighting(), true);
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}
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/// <summary>
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/// Processes any pending message in <see cref="highlightedMessage"/>.
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/// </summary>
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// ScheduleAfterChildren is for ensuring the scroll flow has updated with any new chat lines.
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private void processMessageHighlighting() => SchedulerAfterChildren.AddOnce(() =>
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{
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if (highlightedMessage.Value == null)
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return;
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var chatLine = chatLines.FirstOrDefault(c => c.Message.Equals(highlightedMessage.Value));
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if (chatLine == null)
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return;
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float center = scroll.GetChildPosInContent(chatLine, chatLine.DrawSize / 2) - scroll.DisplayableContent / 2;
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scroll.ScrollTo(Math.Clamp(center, 0, scroll.ScrollableExtent));
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chatLine.Highlight();
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highlightedMessage.Value = null;
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});
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protected override void Dispose(bool isDisposing)
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{
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base.Dispose(isDisposing);
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Channel.NewMessagesArrived -= newMessagesArrived;
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Channel.MessageRemoved -= messageRemoved;
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Channel.PendingMessageResolved -= pendingMessageResolved;
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}
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protected virtual ChatLine CreateChatLine(Message m) => new ChatLine(m);
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protected virtual DaySeparator CreateDaySeparator(DateTimeOffset time) => new DaySeparator(time);
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private void newMessagesArrived(IEnumerable<Message> newMessages) => Schedule(() =>
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{
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if (newMessages.Min(m => m.Id) < chatLines.Max(c => c.Message.Id))
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{
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// there is a case (on initial population) that we may receive past messages and need to reorder.
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// easiest way is to just combine messages and recreate drawables (less worrying about day separators etc.)
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newMessages = newMessages.Concat(chatLines.Select(c => c.Message)).OrderBy(m => m.Id).ToList();
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ChatLineFlow.Clear();
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}
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// Add up to last Channel.MAX_HISTORY messages
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var displayMessages = newMessages.Skip(Math.Max(0, newMessages.Count() - Channel.MAX_HISTORY));
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Message lastMessage = chatLines.LastOrDefault()?.Message;
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foreach (var message in displayMessages)
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{
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addDaySeparatorIfRequired(lastMessage, message);
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ChatLineFlow.Add(CreateChatLine(message));
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lastMessage = message;
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}
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var staleMessages = chatLines.Where(c => c.LifetimeEnd == double.MaxValue).ToArray();
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int count = staleMessages.Length - Channel.MAX_HISTORY;
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if (count > 0)
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{
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for (int i = 0; i < count; i++)
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expireAndAdjustScroll(staleMessages[i]);
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removeAdjacentDaySeparators();
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}
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// due to the scroll adjusts from old messages removal above, a scroll-to-end must be enforced,
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// to avoid making the container think the user has scrolled back up and unwantedly disable auto-scrolling.
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if (newMessages.Any(m => m is LocalMessage))
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scroll.ScrollToEnd();
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processMessageHighlighting();
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});
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private void pendingMessageResolved(Message existing, Message updated) => Schedule(() =>
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{
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var found = chatLines.LastOrDefault(c => c.Message == existing);
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if (found != null)
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{
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Trace.Assert(updated.Id.HasValue, "An updated message was returned with no ID.");
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ChatLineFlow.Remove(found, false);
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found.Message = updated;
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addDaySeparatorIfRequired(chatLines.LastOrDefault()?.Message, updated);
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ChatLineFlow.Add(found);
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}
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});
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private void addDaySeparatorIfRequired(Message lastMessage, Message message)
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{
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if (lastMessage == null || lastMessage.Timestamp.ToLocalTime().Date != message.Timestamp.ToLocalTime().Date)
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{
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// A day separator is displayed even if no messages are in the channel.
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// If there are no messages after it, the simplest way to ensure it is fresh is to remove it
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// and add a new one instead.
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if (ChatLineFlow.LastOrDefault() is DaySeparator ds)
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ChatLineFlow.Remove(ds, true);
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ChatLineFlow.Add(CreateDaySeparator(message.Timestamp));
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removeAdjacentDaySeparators();
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}
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}
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private void removeAdjacentDaySeparators()
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{
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// remove all adjacent day separators after stale message removal
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for (int i = 0; i < ChatLineFlow.Count - 1; i++)
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{
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if (!(ChatLineFlow[i] is DaySeparator)) break;
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if (!(ChatLineFlow[i + 1] is DaySeparator)) break;
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expireAndAdjustScroll(ChatLineFlow[i]);
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}
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}
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private void expireAndAdjustScroll(Drawable d)
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{
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scroll.OffsetScrollPosition(-d.DrawHeight);
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d.Expire();
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}
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private void messageRemoved(Message removed) => Schedule(() =>
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{
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chatLines.FirstOrDefault(c => c.Message == removed)?.FadeColour(Color4.Red, 400).FadeOut(600).Expire();
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});
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private IEnumerable<ChatLine> chatLines => ChatLineFlow.Children.OfType<ChatLine>();
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}
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}
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