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index.ts
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index.ts
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/**
* 拖拽
* @packageDocumentation
* @module vx-hooks/useDragArea
*/
import { ref, Ref } from 'vue'
import { useBool } from '../useBool'
export interface AnyFunction {
(...args: any): any
}
// 数据获取标识
const DATA_SIGN = 'DRAG'
export function getDragDataSign() {
return DATA_SIGN
}
export interface UseDragAPI{
bindDragstart: <T>(data: T) => (e: DragEvent) => void
}
/**
* DOM 拖拽绑定
* @returns { { elems, handlers, bindEle } }
* - elems Ref 已绑定元素列表
* - handlers Ref 数据绑定函数
* - bindEle any => element => void 接收事件传参,返回dom元素收集器
* @example
* ```typescript
* const { bindEle } = useDrag()
* const element = document.querySelector('.move-block')
* element.onDragstart = bindDragstart({id: 1})
* ```
*/
export function useDrag(dataSign = DATA_SIGN):UseDragAPI {
const bindDragstart = <T>(data: T) => (e: DragEvent) => {
/* eslint-disable-next-line no-unused-expressions */
e.dataTransfer?.setData(dataSign, JSON.stringify(data))
}
return { bindDragstart }
}
export interface DragEvents {
dragover?: (e: DragEvent) => void
dragenter?: (e: DragEvent) => void
dragleave?: (e: DragEvent) => void
dragstart?: (e: DragEvent) => void
dragend?: (e: DragEvent) => void
drop?: (e: DragEvent) => void
paste?: (e: DragEvent) => void
}
export interface DragCallbackType {
onDom?(domStr: string, e: DragEvent): void
onUri?(url: string, e: DragEvent): void
onFiles?(files: DataTransfer['files'], e: DragEvent): void
onText?(text: string, e: DragEvent): void
onAny?(e: DragEvent): void
}
// 函数存在既运行
function hasAndRun(fn?: (...args: any) => any, ...args: any[]) {
if (fn) {
fn(...args)
}
}
export interface UseDragAreaAPI {
dragEvents: {
dragover: (e: DragEvent) => void;
dragenter: (e: DragEvent) => void;
dragleave: (e: DragEvent) => void;
dragstart: (e: DragEvent) => void;
dragend: (e: DragEvent) => void;
paste: (e: DragEvent) => void;
drop: (e: DragEvent) => void;
};
isHovering: Ref<boolean>;
isRun: Ref<boolean>;
}
/**
* 拖拽区 hook
* @param { Object } options 拖拽响应回调, 用于处理不同类型数据
* - onDom dom拖拽释放回调
* - onUri uri拖拽释放回调
* - onFiles file拖拽释放回调
* - onText text拖拽释放回调
* @param { Object } events 自定义拖拽事件
* @param { string } dataSign 拖拽取值标识
*
* @returns { array }
* - props 拖拽监听函数
* - isHovering 是否进入监听区
*
* @example
* ``` typescript
*
* const dropType = {
* onDom(data){
* console.log()
* }
* }
* const { dragEvents } = useDragArea(dropType)
*
* ------
* <div class='area' v-on='dragEvents'>
* </div>
*
* ```
*/
export function useDragArea(
dropType = {} as DragCallbackType,
events = {} as DragEvents,
dataSign = DATA_SIGN
):UseDragAreaAPI {
const optionsRef = ref(dropType)
const { state: isHovering, setTrue: startHover, setFalse: endHover } = useBool()
const { state: isRun, setTrue: startRun, setFalse: endRun } = useBool()
const callback = (dataTransfer: DataTransfer | null, event: DragEvent) => {
if (dataTransfer === null) {
return
}
const url = dataTransfer.getData(dataSign)
const dom = dataTransfer.getData(dataSign)
const {
onDom,
onUri,
onFiles,
onText,
onAny
} = optionsRef.value
if (dom && onDom) {
onDom(JSON.parse(dom), event)
return
}
if (url && onUri) {
onUri(url, event)
return
}
if (dataTransfer.files && dataTransfer.files.length && onFiles) {
onFiles(dataTransfer.files, event)
return
}
if (dataTransfer.items && dataTransfer.items.length && onText) {
dataTransfer.items[0].getAsString((text) => { onText(text, event) })
return
}
if (onAny) {
onAny(event)
}
}
const {
dragover,
dragenter,
dragleave,
dragstart,
dragend,
paste,
drop
} = events
const dragEvents = {
dragover: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
hasAndRun(dragover, e)
},
dragenter: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
startHover()
hasAndRun(dragenter, e)
},
dragleave: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
endHover()
hasAndRun(dragleave, e)
},
dragstart: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
startRun()
hasAndRun(dragstart, e)
},
dragend: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
endRun()
hasAndRun(dragend, e)
},
paste: (e: DragEvent) => {
callback(e.dataTransfer, e)
hasAndRun(paste, e)
},
drop: (e: DragEvent) => {
e.preventDefault()
e.stopPropagation()
endHover()
callback(e.dataTransfer, e)
hasAndRun(drop, e)
}
}
return {
dragEvents,
isHovering,
isRun
}
}