tdesign-vue-next
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TDesign Component for vue-next
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{"version":3,"file":"useMultiHeader.mjs","sources":["../../../../components/table/hooks/useMultiHeader.ts"],"sourcesContent":["/**\n * 多级表头相关逻辑\n ** */\n\nimport { RowspanColspan } from '../type';\nimport { BaseTableColumns, ThRowspanAndColspan } from '../types';\n\n// 获取节点深度，即表头总层级\nexport function getNodeDepth(columns: BaseTableColumns, depthMap: Map<any, number>, depth = 1): number {\n let maxDepth = depth;\n // 树形结构递归已有较多函数上下文，此处不使用 forEach 迭代\n for (let i = 0, len = columns.length; i < len; i++) {\n const col = columns[i];\n depthMap.set(col, depth);\n if (col?.children?.length) {\n const deep = getNodeDepth(col.children, depthMap, depth + 1);\n if (deep > maxDepth) {\n maxDepth = deep;\n }\n }\n }\n return maxDepth;\n}\n\n// 或当前节点的叶子结点宽度\nexport function getChildrenNodeWidth(node: BaseTableColumns[0], count = 0) {\n let countNew = count;\n const childrenList = node?.children || [];\n for (let i = 0, len = childrenList.length; i < len; i++) {\n const item = childrenList[i];\n if (item.children) {\n countNew = getChildrenNodeWidth(item, countNew);\n } else {\n countNew += 1;\n }\n }\n return countNew;\n}\n\n// 获取多级表头对应的 colspan 和 rowspan，以及叶子节点\nexport function getThRowspanAndColspan(columns: BaseTableColumns) {\n const depthMap = new Map<any, number>();\n const columnsDepth = getNodeDepth(columns, depthMap);\n const rowspanAndColspanMap: ThRowspanAndColspan = new Map();\n const loop = (nodes: BaseTableColumns, leafColumns: BaseTableColumns) => {\n for (let i = 0, len = nodes.length; i < len; i++) {\n const col = nodes[i];\n const rowspan = col.children ? 1 : columnsDepth - depthMap.get(col) + 1;\n const colspan = col.children ? getChildrenNodeWidth(col) : 1;\n // 避免存在 rowspan 或者 colspan 空属性\n const span: RowspanColspan = {};\n rowspan > 1 && (span.rowspan = rowspan);\n colspan > 1 && (span.colspan = colspan);\n rowspanAndColspanMap.set(col, span);\n if (col?.children?.length) {\n loop(col.children, leafColumns);\n } else {\n leafColumns.push(col);\n }\n }\n 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