import Vue from 'vue'
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// 导入组件
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import VideoPreview from './BoxMask.vue'
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// 使用基础 Vue 构造器，创建一个“子类”
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const VideoPreviewConstructor = Vue.extend(VideoPreview)
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let videoPreviewInstance = null
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/**
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* 初始化视频预览实例
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* @param {string} videoList 视频列表
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* @param {object} defaultIndex 当前查看的视频索引
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*/
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const initInstanceVideoPreview = (videoList, defaultIndex) => {
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videoPreviewInstance = new VideoPreviewConstructor({
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el: document.createElement('div'),
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data() {
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return {
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videoList,
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defaultIndex
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}
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}
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})
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}
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/**
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* 视频预览 Promise 函数
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* @returns {Promise} 抛出确认和取消回调函数
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*/
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const showVideoPreviewBox = (obj) => {
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// 非首次调用服务时，在 DOM 中移除上个实例
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if (videoPreviewInstance !== null) {
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document.body.removeChild(videoPreviewInstance.$el)
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}
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let { videoList, defaultIndex } = obj
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return new Promise((reslove) => {
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initInstanceVideoPreview(videoList, defaultIndex)
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videoPreviewInstance.callback = (res) => {
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reslove(res)
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// 服务取消时卸载 DOM
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if (res === 'cancel' && videoPreviewInstance !== null) {
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document.body.removeChild(videoPreviewInstance.$el)
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videoPreviewInstance = null
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}
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}
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document.body.appendChild(videoPreviewInstance.$el) // 挂载 DOM
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Vue.nextTick(() => {
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videoPreviewInstance.visible = true // 打开视频预览遮罩层
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})
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})
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}
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export default showVideoPreviewBox
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