添加一个表格组件，原理上贴近现代表格系统，理论上可以应对超大型表格以及离散数据集合。

Runtime/XTable/Core/XTableBlock.cs

@@ -0,0 +1,90 @@
+using System.Collections.Generic;
+
+namespace XericUI.XTable.Core
+{
+	/// <summary>
+	/// 单个数据块——保存 BlockSizeX × BlockSizeY 个单元格数据。
+	/// 数据使用线性数组存储，索引 = localRow * BlockSizeX + localCol。
+	/// </summary>
+	public class XTableBlock
+	{
+		/// <summary>块在全局块坐标系中的行号</summary>
+		public int BlockRow;
+
+		/// <summary>块在全局块坐标系中的列号</summary>
+		public int BlockCol;
+
+		/// <summary>块内单元格列数</summary>
+		public int BlockSizeX;
+
+		/// <summary>块内单元格行数</summary>
+		public int BlockSizeY;
+
+		/// <summary>
+		/// 数据存储——线性数组。
+		/// 索引 = localRow * BlockSizeX + localCol。
+		/// </summary>
+		public XTableCellData[] Cells;
+
+		/// <summary>合并单元格描述列表</summary>
+		public List<XTableMergeDescriptor> MergeDescriptors;
+
+		/// <summary>
+		/// 创建指定尺寸的块
+		/// </summary>
+		public XTableBlock(int blockSizeX, int blockSizeY)
+		{
+			BlockSizeX = blockSizeX;
+			BlockSizeY = blockSizeY;
+			Cells = new XTableCellData[blockSizeX * blockSizeY];
+			MergeDescriptors = new List<XTableMergeDescriptor>();
+		}
+
+		/// <summary>
+		/// 创建指定尺寸和位置的块
+		/// </summary>
+		public XTableBlock(int blockSizeX, int blockSizeY, int blockRow, int blockCol)
+			: this(blockSizeX, blockSizeY)
+		{
+			BlockRow = blockRow;
+			BlockCol = blockCol;
+		}
+
+		/// <summary>
+		/// 通过块内局部坐标获取单元格数据
+		/// </summary>
+		public XTableCellData GetCell(int localRow, int localCol)
+		{
+			int index = localRow * BlockSizeX + localCol;
+			if (index < 0 || index >= Cells.Length) return null;
+			return Cells[index];
+		}
+
+		/// <summary>
+		/// 通过块内局部坐标设置单元格数据
+		/// </summary>
+		public void SetCell(int localRow, int localCol, XTableCellData data)
+		{
+			int index = localRow * BlockSizeX + localCol;
+			if (index < 0 || index >= Cells.Length) return;
+			Cells[index] = data;
+		}
+
+		/// <summary>
+		/// 检查是否有合并描述重定向此单元格
+		/// </summary>
+		/// <returns>合并描述，若无重定向则返回 null</returns>
+		public XTableMergeDescriptor GetMergeRedirect(int localRow, int localCol)
+		{
+			if (MergeDescriptors == null || MergeDescriptors.Count == 0)
+				return null;
+
+			for (int i = 0; i < MergeDescriptors.Count; i++)
+			{
+				if (MergeDescriptors[i].Contains(localRow, localCol))
+					return MergeDescriptors[i];
+			}
+			return null;
+		}
+	}
+}