Initial commit: AetherBags + KamiToolKit for FC Gitea

Co-authored-by: Cursor <cursoragent@cursor.com>

KamiToolKit/Nodes/Layout/GridNode.cs

@@ -0,0 +1,70 @@
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+
+namespace KamiToolKit.Nodes;
+
+public record GridSize(int Columns, int Rows);
+
+public class GridNode : SimpleComponentNode {
+
+    private readonly List<SimpleComponentNode> gridNodes = [];
+
+    public SimpleComponentNode this[int x, int y] {
+        get => gridNodes[x + y * GridSize.Columns];
+        set => gridNodes[x + y * GridSize.Columns] = value;
+    }
+
+    public SimpleComponentNode this[int index] {
+        get => gridNodes[index];
+        set => gridNodes[index] = value;
+    }
+
+    /// <summary>
+    ///     Warning: Changing this value will dispose any existing layout nodes.
+    /// </summary>
+    public required GridSize GridSize {
+        get;
+        set {
+            field = value;
+            ReallocateArray();
+        }
+    } = new(0, 0);
+
+    private void ReallocateArray() {
+        foreach (var node in gridNodes) {
+            node.Dispose();
+        }
+        gridNodes.Clear();
+
+        foreach (var _ in Enumerable.Range(0, GridSize.Rows * GridSize.Columns)) {
+            gridNodes.Add(new SimpleComponentNode());
+        }
+
+        foreach (var row in Enumerable.Range(0, GridSize.Rows)) {
+            foreach (var column in Enumerable.Range(0, GridSize.Columns)) {
+                this[column, row].AttachNode(this);
+                this[column, row].IsVisible = true;
+            }
+        }
+
+        RecalculateLayout();
+    }
+
+    protected override void OnSizeChanged() {
+        base.OnSizeChanged();
+        RecalculateLayout();
+    }
+
+    public void RecalculateLayout() {
+        var gridWidth = Width / GridSize.Columns;
+        var gridHeight = Height / GridSize.Rows;
+
+        foreach (var row in Enumerable.Range(0, GridSize.Rows)) {
+            foreach (var column in Enumerable.Range(0, GridSize.Columns)) {
+                this[column, row].Size = new Vector2(gridWidth, gridHeight);
+                this[column, row].Position = new Vector2(column * gridWidth, row * gridHeight);
+            }
+        }
+    }
+}