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feat: tree节点拖拽功能 #184
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feat: tree节点拖拽功能 #184
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174 changes: 174 additions & 0 deletions
174
packages/devui-vue/devui/tree/src/composables/use-draggable.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| import { reactive, ref, watch } from 'vue' | ||
| import type { Ref } from 'vue' | ||
| import { TreeItem, IDropType, Nullable } from '../tree-types' | ||
| import { cloneDeep } from 'lodash-es' | ||
|
|
||
| const ACTIVE_NODE = 'devui-tree-node__content--value-wrapper' | ||
| interface DragState { | ||
| dropType?: 'prev' | 'next' | 'inner' | ||
| draggingNode?: Nullable<HTMLElement> | ||
| } | ||
|
|
||
| export default function useDraggable( | ||
| draggable: boolean, | ||
| dropType: IDropType, | ||
| node: Ref<Nullable<HTMLElement>>, | ||
| renderData: Ref<TreeItem[]>, | ||
| data: Ref<TreeItem[]> | ||
| ): any { | ||
| const dragState = reactive<DragState>({ | ||
| dropType: null, | ||
| draggingNode: null, | ||
| }) | ||
| const treeIdMapValue = ref({}) | ||
| watch( | ||
| () => renderData.value, | ||
| () => { | ||
| treeIdMapValue.value = renderData.value.reduce((acc, cur) => ({ ...acc, [cur.id]: cur }), {}) | ||
| }, | ||
| { deep: true, immediate: true } | ||
| ) | ||
|
|
||
| const removeDraggingStyle = (target: Nullable<HTMLElement>) => { | ||
| target | ||
| .querySelector(`.${ACTIVE_NODE}`) | ||
| ?.classList.remove(...['prev', 'next', 'inner'].map((item) => `devui-drop-${item}`)) | ||
| } | ||
|
|
||
| const checkIsParent = (childNodeId: number | string, parentNodeId: number | string) => { | ||
| const realParentId = treeIdMapValue.value[childNodeId].parentId | ||
| if (realParentId === parentNodeId) { | ||
| return true | ||
| } else if (realParentId !== undefined) { | ||
| return checkIsParent(realParentId, parentNodeId) | ||
| } else { | ||
| return false | ||
| } | ||
| } | ||
| const handlerDropData = (dragNodeId: string | number, dropNodeId: string | number, dropType?: string) => { | ||
| const cloneData = cloneDeep(data.value) | ||
| let nowDragNode | ||
| let nowDropNode | ||
| const findDragAndDropNode = (curr: TreeItem[]) => { | ||
| if (!Array.isArray(curr)) return | ||
| curr.every((item, index) => { | ||
| if (nowDragNode && nowDropNode) { | ||
| return false | ||
| } | ||
| if (item.id === dragNodeId) { | ||
| nowDragNode = { target: curr, index, item } | ||
| } else if (item.id === dropNodeId) { | ||
| nowDropNode = { target: curr, index, item } | ||
| } | ||
| if (!nowDragNode || !nowDropNode) { | ||
| findDragAndDropNode(item.children) | ||
| } | ||
| return true | ||
| }) | ||
| } | ||
| findDragAndDropNode(cloneData) | ||
| if (nowDragNode && nowDropNode && dropType) { | ||
| const cloneDrapNode = cloneDeep(nowDragNode.target[nowDragNode.index]) | ||
| if (dropType === 'prev') { | ||
| nowDropNode.target.splice(nowDropNode.index, 0, cloneDrapNode) | ||
| } else if (dropType === 'next') { | ||
| nowDropNode.target.splice(nowDropNode.index + 1, 0, cloneDrapNode) | ||
| } else if (dropType === 'inner') { | ||
| const children = nowDropNode.target[nowDropNode.index].children | ||
| if (Array.isArray(children)) { | ||
| children.unshift(cloneDrapNode) | ||
| } else { | ||
| nowDropNode.target[nowDropNode.index].children = [cloneDrapNode] | ||
| } | ||
| } | ||
| const targetIndex = nowDragNode.target.indexOf(nowDragNode.item) | ||
| if (targetIndex !== -1) { | ||
| nowDragNode.target.splice(targetIndex, 1) | ||
| } | ||
|
|
||
| } | ||
|
|
||
| return cloneData | ||
| } | ||
| const onDragstart = (event: DragEvent, treeNode: TreeItem) => { | ||
| dragState.draggingNode = <Nullable<HTMLElement>>event.target | ||
| const data = { | ||
| type: 'tree-node', | ||
| nodeId: treeNode.id | ||
| } | ||
| event.dataTransfer.setData('Text', JSON.stringify(data)) | ||
| } | ||
| const onDragover = (event: DragEvent) => { | ||
| if (draggable) { | ||
| event.preventDefault() | ||
| event.dataTransfer.dropEffect = 'move' | ||
| if (!node) { | ||
| return | ||
| } | ||
| const dropPrev = dropType.dropPrev | ||
| const dropNext = dropType.dropNext | ||
| const dropInner = dropType.dropInner | ||
|
|
||
| let innerDropType | ||
|
|
||
| const prevPercent = dropPrev ? (dropInner ? 0.25 : dropNext ? 0.45 : 1) : -1 | ||
| const nextPercent = dropNext ? (dropInner ? 0.75 : dropPrev ? 0.55 : 0) : 1 | ||
| const currentTarget = <Nullable<HTMLElement>>event.currentTarget | ||
| const targetPosition = currentTarget.getBoundingClientRect() | ||
| const distance = event.clientY - targetPosition.top | ||
|
|
||
| if (distance < targetPosition.height * prevPercent) { | ||
| innerDropType = 'prev' | ||
| } else if (distance > targetPosition.height * nextPercent) { | ||
| innerDropType = 'next' | ||
| } else if (dropInner) { | ||
| innerDropType = 'inner' | ||
| } else { | ||
| innerDropType = undefined | ||
| } | ||
| removeDraggingStyle(currentTarget) | ||
| if (innerDropType && innerDropType !== 'none') { | ||
| currentTarget.querySelector(`.${ACTIVE_NODE}`)?.classList.add(`devui-drop-${innerDropType}`) | ||
| } | ||
| dragState.dropType = innerDropType | ||
| } | ||
| } | ||
| const onDragleave = (event: DragEvent) => { | ||
| removeDraggingStyle(<Nullable<HTMLElement>>event.currentTarget) | ||
| } | ||
| const onDrop = (event: DragEvent, dropNode: TreeItem) => { | ||
| removeDraggingStyle(<Nullable<HTMLElement>>event.currentTarget) | ||
| if (!draggable) { | ||
| return | ||
| } | ||
| event.preventDefault() | ||
| const transferDataStr = event.dataTransfer.getData('Text') | ||
| if (transferDataStr) { | ||
| try { | ||
| const transferData = JSON.parse(transferDataStr) | ||
| if (typeof transferData === 'object' && transferData.type === 'tree-node') { | ||
| const dragNodeId = transferData.nodeId | ||
| const isParent = checkIsParent(dropNode.id, dragNodeId) | ||
| if (dragNodeId === dropNode.id || isParent) { | ||
| return | ||
| } | ||
| let result | ||
| if (dragState.dropType) { | ||
| result = handlerDropData(dragNodeId, dropNode.id, dragState.dropType) | ||
| } | ||
| data.value = result | ||
| } | ||
| } catch (e) { | ||
| console.error(e) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return { | ||
| onDragstart, | ||
| onDragover, | ||
| onDragleave, | ||
| onDrop, | ||
| dragState | ||
| } | ||
| } | ||
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