新增 FlowScope Git 包雏形

Packages/com.flowscope.gamecore/Runtime/UI/UILayer.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace FlowScope.UI
+{
+    internal sealed class UILayer
+    {
+        private readonly Stack<UIPanelRecord> _stack = new();
+        private readonly Dictionary<Type, UIPanelRecord> _cachedPanels = new();
+
+        public UILayer(string name, Canvas canvas, int sortOrder, PanelStrategy strategy)
+        {
+            Name = name;
+            Canvas = canvas;
+            Strategy = strategy;
+            Canvas.sortingOrder = sortOrder;
+        }
+
+        public string Name { get; }
+        public Canvas Canvas { get; }
+        public PanelStrategy Strategy { get; }
+        public int Count => _stack.Count;
+
+        public void Push(UIPanelRecord record)
+        {
+            record.IsOpen = true;
+            _stack.Push(record);
+        }
+
+        public UIPanelRecord Peek()
+        {
+            return _stack.Peek();
+        }
+
+        public UIPanelRecord Pop()
+        {
+            var record = _stack.Pop();
+            record.IsOpen = false;
+            return record;
+        }
+
+        public bool TryGetCached(Type panelType, out UIPanelRecord record)
+        {
+            return _cachedPanels.TryGetValue(panelType, out record);
+        }
+
+        public void Cache(UIPanelRecord record)
+        {
+            _cachedPanels[record.PanelType] = record;
+        }
+
+        public void RemoveCached(Type panelType)
+        {
+            _cachedPanels.Remove(panelType);
+        }
+
+        public bool ContainsOpen(Type panelType, out UIPanelRecord record)
+        {
+            foreach (var current in _stack)
+            {
+                if (current.PanelType == panelType)
+                {
+                    record = current;
+                    return true;
+                }
+            }
+
+            record = null;
+            return false;
+        }
+    }
+}