import type { Ref } from 'vue';
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import { unref, watchEffect } from 'vue';
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import { useTimeoutFn } from '@vueuse/core';
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export interface UseModalDragMoveContext {
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destroyOnClose: Ref<boolean | undefined> | undefined;
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draggable: Ref<boolean>;
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open: Ref<boolean>;
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}
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export function useModalDragMove(context: UseModalDragMoveContext) {
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const getStyle = (dom: any, attr: any) => {
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return getComputedStyle(dom)[attr];
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};
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const drag = (wrap: any) => {
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if (!wrap) return;
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wrap.dataset.drag = unref(context.draggable);
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const dialogHeaderEl = wrap.querySelector('.ant-modal-header');
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const dragDom = wrap.querySelector('.ant-modal');
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if (!dialogHeaderEl || !dragDom || !unref(context.draggable)) return;
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dialogHeaderEl.style.cursor = 'move';
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dialogHeaderEl.addEventListener('mousedown', (e: any) => {
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if (!e) return;
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// 鼠标按下，计算当前元素距离可视区的距离
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const disX = e.clientX;
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const disY = e.clientY;
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const screenWidth = document.body.clientWidth; // body当前宽度
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const screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)
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const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
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const dragDomheight = dragDom.offsetHeight; // 对话框高度
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const minDragDomLeft = dragDom.offsetLeft;
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const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
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const minDragDomTop = dragDom.offsetTop;
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let maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
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// 弹出页面出现自动吸顶，无法移动和显示头部---
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if (maxDragDomTop < 0) maxDragDomTop = screenHeight - dragDom.offsetTop;
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// 弹出页面出现自动吸顶，无法移动和显示头部---
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// 获取到的值带px 正则匹配替换
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const domLeft: any = getStyle(dragDom, 'left');
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const domTop: any = getStyle(dragDom, 'top');
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let styL = +domLeft;
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let styT = +domTop;
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// 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
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if (domLeft.includes('%')) {
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styL = +document.body.clientWidth * (+domLeft.replaceAll('%', '') / 100);
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styT = +document.body.clientHeight * (+domTop.replaceAll('%', '') / 100);
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} else {
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styL = +domLeft.replaceAll('px', '');
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styT = +domTop.replaceAll('px', '');
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}
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const onMousemove = (e) => {
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// 通过事件委托，计算移动的距离
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let left = e.clientX - disX;
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let top = e.clientY - disY;
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// 边界处理
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if (-left > minDragDomLeft) {
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left = -minDragDomLeft;
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} else if (left > maxDragDomLeft) {
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left = maxDragDomLeft;
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}
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if (-top > minDragDomTop) {
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top = -minDragDomTop;
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} else if (top > maxDragDomTop) {
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top = maxDragDomTop;
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}
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// 移动当前元素
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dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
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};
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const onMouseup = () => {
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document.removeEventListener('mousemove', onMousemove);
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document.removeEventListener('mouseup', onMouseup);
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};
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document.addEventListener('mousemove', onMousemove);
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document.addEventListener('mouseup', onMouseup);
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});
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};
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const handleDrag = () => {
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const dragWraps = document.querySelectorAll('.ant-modal-wrap');
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for (const wrap of dragWraps) {
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if (!wrap) continue;
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const display = getStyle(wrap, 'display');
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const draggable = (wrap as any).dataset.drag;
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if (
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display !== 'none' && // 拖拽位置
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(draggable === null || unref(context.destroyOnClose))
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) {
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drag(wrap);
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}
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}
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};
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watchEffect(() => {
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if (!unref(context.open) || !unref(context.draggable)) {
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return;
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}
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useTimeoutFn(() => {
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handleDrag();
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}, 30);
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});
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}
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