Equipment & inhands. (#110)

* Equipment WiP

* Equipment's starting to work.

* Equipment works properly 100% now.

* Inhands work.

Also more clothes.

Content.Shared/GameObjects/Components/Inventory/InventoryTemplates.cs

@@ -5,21 +5,50 @@ namespace Content.Shared.GameObjects
 {
     public abstract class Inventory
     {
-        abstract public int Columns { get; }
+        public abstract int Columns { get; }
 
-        abstract public List<Slots> SlotMasks { get; }
+        public abstract IReadOnlyList<Slots> SlotMasks { get; }
+
+        /// <summary>
+        ///     Gets the drawing order of a slot.
+        /// </summary>
+        /// <returns>
+        ///     An int that can be used for sorting relative to other drawing orders.
+        ///     The value returned does not mean anything else.
+        /// </returns>
+        public abstract int SlotDrawingOrder(Slots slot);
     }
 
     public class HumanInventory : Inventory
     {
         public override int Columns => 3;
 
-        public override List<Slots> SlotMasks => new List<Slots>()
-            {
-                Slots.EYES, Slots.HEAD, Slots.EARS,
-                Slots.OUTERCLOTHING, Slots.MASK, Slots.INNERCLOTHING,
-                Slots.BACKPACK, Slots.BELT, Slots.GLOVES,
-                Slots.NONE, Slots.SHOES, Slots.IDCARD
-            };
+        private static Dictionary<Slots, int> _slotDrawingOrder = new Dictionary<Slots, int>
+        {
+            {Slots.HEAD, 10},
+            {Slots.MASK, 9},
+            {Slots.EARS, 8},
+            {Slots.BACKPACK, 7},
+            {Slots.EYES, 6},
+            {Slots.OUTERCLOTHING, 5},
+            {Slots.BELT, 4},
+            {Slots.GLOVES, 3},
+            {Slots.SHOES, 2},
+            {Slots.IDCARD, 1},
+            {Slots.INNERCLOTHING, 0}
+        };
+
+        public override IReadOnlyList<Slots> SlotMasks { get; } = new List<Slots>()
+        {
+            Slots.EYES, Slots.HEAD, Slots.EARS,
+            Slots.OUTERCLOTHING, Slots.MASK, Slots.INNERCLOTHING,
+            Slots.BACKPACK, Slots.BELT, Slots.GLOVES,
+            Slots.NONE, Slots.SHOES, Slots.IDCARD
+        };
+
+        public override int SlotDrawingOrder(Slots slot)
+        {
+            return _slotDrawingOrder.TryGetValue(slot, out var val) ? val : 0;
+        }
     }
 }