tdesign-vue-next/es/tree/hooks/useTreeScroll.mjs.map

TDesign Component for vue-next

{"version":3,"file":"useTreeScroll.mjs","sources":["../../../../components/tree/hooks/useTreeScroll.ts"],"sourcesContent":["import { computed, onMounted, TypeRef, TypeScroll, TreeNode } from '../utils/adapt';\nimport { get } from 'lodash-es';\nimport { TypeTreeState, TypeTimer } from '../types';\nimport log from '@tdesign/common-js/log/index';\nimport { useVirtualScrollNew } from '@tdesign/shared-hooks';\n\nimport type { ComponentScrollToElementParams } from '../../common';\n\n// tree 虚拟滚动整合\nexport default function useTreeScroll(state: TypeTreeState) {\n  const treeState = state;\n  const { props, context, allNodes, nodes, scope, treeContentRef, isScrolling } = treeState;\n\n  const scrollProps: TypeRef<TypeScroll> = computed(() => ({\n    // 默认一行高度为 34px\n    rowHeight: 34,\n    ...props.scroll,\n  }));\n  scope.scrollProps = scrollProps;\n\n  // 虚拟滚动\n  const virtualScrollParams = computed(() => {\n    const list = allNodes.value.filter((node: TreeNode) => node.visible);\n    return {\n      data: list,\n      scroll: scrollProps.value,\n      preventResizeRefresh: true,\n    };\n  });\n\n  const virtualConfig = useVirtualScrollNew(treeContentRef, virtualScrollParams);\n  scope.virtualConfig = virtualConfig;\n  treeState.virtualConfig = virtualConfig;\n\n  onMounted(() => {\n    const isVirtual = virtualConfig?.isVirtualScroll.value;\n    if (isVirtual) {\n      virtualConfig.handleScroll();\n    }\n  });\n\n  const emitScrollEvent = (e: WheelEvent) => {\n    props.onScroll?.({ e });\n    // Vue3 ignore next line\n    context.emit('scroll', { e });\n  };\n\n  // 设置滚动结束状态\n  let scrollStopTimer: TypeTimer = null;\n  const setScrolling = () => {\n    isScrolling.value = true;\n    if (scrollStopTimer) {\n      clearTimeout(scrollStopTimer);\n      scrollStopTimer = null;\n    }\n    scrollStopTimer = setTimeout(() => {\n      scrollStopTimer = null;\n      isScrolling.value = false;\n    }, 100);\n  };\n\n  let lastScrollY = 0;\n  const onInnerVirtualScroll = (e: WheelEvent) => {\n    setScrolling();\n    const isVirtual = virtualConfig?.isVirtualScroll.value;\n    const target = (e.target || e.srcElement) as HTMLElement;\n    const top = target.scrollTop;\n\n    // 排除横向滚动触发的纵向虚拟滚动计算\n    if (lastScrollY !== top) {\n      if (isVirtual) {\n        virtualConfig.handleScroll();\n        nodes.value = virtualConfig.visibleData.value;\n      }\n    } else {\n      lastScrollY = 0;\n    }\n    lastScrollY = top;\n    emitScrollEvent(e);\n  };\n\n  const handleScrollTo = (params: ComponentScrollToElementParams) => {\n    let index = params.index;\n    if (!index && index !== 0) {\n      if (!params.key) {\n        log.error('Tree', 'scrollToElement: one of `index` or `key` must exist.');\n        return;\n      }\n      index = allNodes.value?.findIndex((item) =>\n        [get(item.data, 'key'), get(item.data, props.keys?.['value'] || 'value')].includes(params.key),\n      );\n      if (index < 0) {\n        log.error('Tree', `${params.key} does not exist in data, check \\`key\\` or \\`data\\` please.`);\n        return;\n      }\n    }\n    virtualConfig.scrollToElement({ ...params, index: index - 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