Add stand-alone chat component

osu.Game/Online/Chat/StandAloneChatDisplay.cs

@@ -0,0 +1,175 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Configuration;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Online.Chat
+{
+    /// <summary>
+    /// Display a chat channel in an insolated region.
+    /// </summary>
+    public class StandAloneChatDisplay : CompositeDrawable
+    {
+        public readonly Bindable<Channel> Channel = new Bindable<Channel>();
+        private readonly FillFlowContainer messagesFlow;
+        private Channel lastChannel;
+
+        public StandAloneChatDisplay()
+        {
+            CornerRadius = 10;
+            Masking = true;
+
+            InternalChildren = new Drawable[]
+            {
+                new Box
+                {
+                    Colour = Color4.Black,
+                    Alpha = 0.8f,
+                    RelativeSizeAxes = Axes.Both
+                },
+                messagesFlow = new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    LayoutEasing = Easing.Out,
+                    LayoutDuration = 500,
+                    Anchor = Anchor.BottomLeft,
+                    Origin = Anchor.BottomLeft,
+                    Direction = FillDirection.Vertical
+                }
+            };
+
+            Channel.BindValueChanged(channelChanged);
+        }
+
+        public void Contract()
+        {
+            this.FadeIn(300);
+            this.MoveToY(0, 500, Easing.OutQuint);
+        }
+
+        public void Expand()
+        {
+            this.FadeOut(200);
+            this.MoveToY(100, 500, Easing.In);
+        }
+
+        protected virtual Drawable CreateMessage(Message message)
+        {
+            return new StandAloneMessage(message);
+        }
+
+        private void channelChanged(Channel channel)
+        {
+            if (lastChannel != null)
+                lastChannel.NewMessagesArrived -= newMessages;
+
+            lastChannel = channel;
+            messagesFlow.Clear();
+
+            if (channel == null) return;
+
+            channel.NewMessagesArrived += newMessages;
+        }
+
+        private void newMessages(IEnumerable<Message> messages)
+        {
+            var excessChildren = messagesFlow.Children.Count - 10;
+            if (excessChildren > 0)
+                foreach (var c in messagesFlow.Children.Take(excessChildren))
+                    c.Expire();
+
+            foreach (var message in messages)
+            {
+                var formatted = MessageFormatter.FormatMessage(message);
+                var drawable = CreateMessage(formatted);
+                drawable.Y = messagesFlow.Height;
+                messagesFlow.Add(drawable);
+            }
+        }
+
+        protected class StandAloneMessage : CompositeDrawable
+        {
+            protected readonly Message Message;
+            protected OsuSpriteText SenderText;
+            protected Circle ColourBox;
+
+            public StandAloneMessage(Message message)
+            {
+                Message = message;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                Margin = new MarginPadding(3);
+
+                RelativeSizeAxes = Axes.X;
+                AutoSizeAxes = Axes.Y;
+
+                InternalChildren = new Drawable[]
+                {
+                    new FillFlowContainer
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Direction = FillDirection.Horizontal,
+                        Children = new Drawable[]
+                        {
+                            new Container
+                            {
+                                RelativeSizeAxes = Axes.X,
+                                Width = 0.2f,
+                                Children = new Drawable[]
+                                {
+                                    SenderText = new OsuSpriteText
+                                    {
+                                        Font = @"Exo2.0-Bold",
+                                        Anchor = Anchor.TopRight,
+                                        Origin = Anchor.TopRight,
+                                        Text = Message.Sender.ToString()
+                                    }
+                                }
+                            },
+                            new Container
+                            {
+                                Size = new Vector2(8, OsuSpriteText.FONT_SIZE),
+                                Margin = new MarginPadding { Horizontal = 3 },
+                                Children = new Drawable[]
+                                {
+                                    ColourBox = new Circle
+                                    {
+                                        Anchor = Anchor.Centre,
+                                        Origin = Anchor.Centre,
+                                        Size = new Vector2(8)
+                                    }
+                                }
+                            },
+                            new OsuTextFlowContainer
+                            {
+                                RelativeSizeAxes = Axes.X,
+                                AutoSizeAxes = Axes.Y,
+                                Width = 0.5f,
+                                Text = Message.DisplayContent
+                            }
+                        }
+                    }
+                };
+
+                if (!string.IsNullOrEmpty(Message.Sender.Colour))
+                    SenderText.Colour = ColourBox.Colour = OsuColour.FromHex(Message.Sender.Colour);
+            }
+        }
+    }
+}