Admin overlay (#4728)

* adds admin overlay

* fixes things

Content.Client/Administration/AdminNameOverlay.cs

@@ -0,0 +1,82 @@
+using System.Collections.Generic;
+using Content.Client.Administration.Managers;
+using Content.Shared.Administration.Menu;
+using Robust.Client.Graphics;
+using Robust.Client.ResourceManagement;
+using Robust.Shared.Containers;
+using Robust.Shared.Enums;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Maths;
+using Robust.Shared.Physics;
+
+namespace Content.Client.Administration
+{
+    internal class AdminNameOverlay : Overlay
+    {
+        private readonly AdminMenuManager _manager;
+        private readonly IEntityManager _entityManager;
+        private readonly IEyeManager _eyeManager;
+        private readonly IEntityLookup _entityLookup;
+        private IReadOnlyList<AdminMenuPlayerListMessage.PlayerInfo>? _playerInfos;
+        private readonly Font _font;
+
+        public AdminNameOverlay(AdminMenuManager manager, IEntityManager entityManager, IEyeManager eyeManager, IResourceCache resourceCache, IEntityLookup entityLookup)
+        {
+            _manager = manager;
+            _entityManager = entityManager;
+            _eyeManager = eyeManager;
+            _entityLookup = entityLookup;
+            ZIndex = 200;
+            _font = new VectorFont(resourceCache.GetResource<FontResource>("/Fonts/NotoSans/NotoSans-Regular.ttf"), 10);
+        }
+
+        public override OverlaySpace Space => OverlaySpace.ScreenSpace;
+
+        public void UpdatePlayerInfo(List<AdminMenuPlayerListMessage.PlayerInfo> playerInfos)
+        {
+            _playerInfos = playerInfos;
+        }
+
+        protected override void Draw(in OverlayDrawArgs args)
+        {
+            if (_playerInfos == null)
+            {
+                return;
+            }
+
+            var viewport = _eyeManager.GetWorldViewport();
+
+            foreach (var playerInfo in _playerInfos)
+            {
+                // Otherwise the entity can not exist yet
+                if (!_entityManager.TryGetEntity(playerInfo.EntityUid, out var entity))
+                {
+                    continue;
+                }
+
+                // if not on the same map, continue
+                if (entity.Transform.MapID != _eyeManager.CurrentMap)
+                {
+                    continue;
+                }
+
+                var aabb = _entityLookup.GetWorldAabbFromEntity(entity);
+
+                // if not on screen, continue
+                if (!aabb.Intersects(in viewport))
+                {
+                    continue;
+                }
+
+                var lineoffset = new Vector2(0, 11f);
+                var screenCoordinates = _eyeManager.WorldToScreen(aabb.TopRight + (0, -0.1f));
+                if (playerInfo.Antag)
+                {
+                    args.ScreenHandle.DrawString(_font, screenCoordinates + (lineoffset * 2), "ANTAG", Color.OrangeRed);
+                }
+                args.ScreenHandle.DrawString(_font, screenCoordinates+(lineoffset), playerInfo.Username, Color.Yellow);
+                args.ScreenHandle.DrawString(_font, screenCoordinates, playerInfo.CharacterName, Color.Aquamarine);
+            }
+        }
+    }
+}