Merge pull request #22262 from Joehuu/chat-mention-user

Add ability to easily mention users in chat by right clicking username

osu.Game/Localisation/ChatStrings.cs

@@ -19,6 +19,11 @@ public static class ChatStrings
         /// </summary>
         public static LocalisableString HeaderDescription => new TranslatableString(getKey(@"header_description"), @"join the real-time discussion");
 
+        /// <summary>
+        /// "Mention"
+        /// </summary>
+        public static LocalisableString MentionUser => new TranslatableString(getKey(@"mention_user"), @"Mention");
+
         private static string getKey(string key) => $"{prefix}:{key}";
     }
 }

osu.Game/Online/Chat/StandAloneChatDisplay.cs

@@ -25,6 +25,7 @@ namespace osu.Game.Online.Chat
     /// </summary>
     public partial class StandAloneChatDisplay : CompositeDrawable
     {
+        [Cached]
         public readonly Bindable<Channel> Channel = new Bindable<Channel>();
 
         protected readonly ChatTextBox TextBox;

osu.Game/Overlays/Chat/DrawableUsername.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using osu.Framework.Allocation;
+using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -24,6 +25,7 @@
 using osu.Game.Resources.Localisation.Web;
 using osuTK;
 using osuTK.Graphics;
+using ChatStrings = osu.Game.Localisation.ChatStrings;
 
 namespace osu.Game.Overlays.Chat
 {
@@ -65,6 +67,9 @@ public override float Width
         [Resolved(canBeNull: true)]
         private UserProfileOverlay? profileOverlay { get; set; }
 
+        [Resolved]
+        private Bindable<Channel?>? currentChannel { get; set; }
+
         private readonly APIUser user;
         private readonly OsuSpriteText drawableText;
 
@@ -156,6 +161,14 @@ public MenuItem[] ContextMenuItems
                 if (!user.Equals(api.LocalUser.Value))
                     items.Add(new OsuMenuItem(UsersStrings.CardSendMessage, MenuItemType.Standard, openUserChannel));
 
+                if (currentChannel?.Value != null)
+                {
+                    items.Add(new OsuMenuItem(ChatStrings.MentionUser, MenuItemType.Standard, () =>
+                    {
+                        currentChannel.Value.TextBoxMessage.Value += $"@{user.Username} ";
+                    }));
+                }
+
                 return items.ToArray();
             }
         }