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88 lines
2.8 KiB
C#
88 lines
2.8 KiB
C#
// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
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// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using osu.Framework.Graphics;
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using osu.Framework.Graphics.Containers;
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using osu.Game.Online.Chat;
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namespace osu.Game.Overlays.Chat
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{
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public class DrawableChannel : Container
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{
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public readonly Channel Channel;
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private readonly FillFlowContainer flow;
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private readonly ScrollContainer scroll;
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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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Children = new Drawable[]
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{
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scroll = new ScrollContainer
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{
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RelativeSizeAxes = Axes.Both,
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Children = new Drawable[]
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{
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flow = new FillFlowContainer
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{
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Direction = FillDirection.Vertical,
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RelativeSizeAxes = Axes.X,
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AutoSizeAxes = Axes.Y,
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Padding = new MarginPadding { Left = 20, Right = 20 }
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}
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}
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}
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};
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channel.NewMessagesArrived += newMessagesArrived;
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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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newMessagesArrived(Channel.Messages);
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scrollToEnd();
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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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}
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private void newMessagesArrived(IEnumerable<Message> newMessages)
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{
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if (!IsLoaded) return;
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var displayMessages = newMessages.Skip(Math.Max(0, newMessages.Count() - Channel.MAX_HISTORY));
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if (scroll.IsScrolledToEnd(10) || !flow.Children.Any())
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scrollToEnd();
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//up to last Channel.MAX_HISTORY messages
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foreach (Message m in displayMessages)
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{
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var d = new ChatLine(m);
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flow.Add(d);
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}
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while (flow.Children.Count(c => c.LifetimeEnd == double.MaxValue) > Channel.MAX_HISTORY)
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{
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var d = flow.Children.First(c => c.LifetimeEnd == double.MaxValue);
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if (!scroll.IsScrolledToEnd(10))
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scroll.OffsetScrollPosition(-d.DrawHeight);
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d.Expire();
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}
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}
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private void scrollToEnd() => Scheduler.AddDelayed(() => scroll.ScrollToEnd(), 50);
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}
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}
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