learning-system-mobile/components/video-player/progress-bar.vue

/**
  $emit: updateProgress, -> 调整进度条后触发的事件，传递参数：currentProgress
         getMouseDownStatus, -> 获取是否鼠标按下的状态，传递参数：true/false
  props: width, height,
         currentProgress, -> 当前进度，范围0-1
 */
<template>
  <div
    class="progress-bar"
    :style="{width: width}"
    @touchstart.left="start"
    @touchmove="move"
    @touchend="up"
  >
    <div class="progress-full" :style="{height: height}">
      <div class="progress-current" :style="{width: currentProgress + '%'}"></div>
    </div>
  </div>
</template>

<script>
export default {
  name: "progress-bar",
  props: {
    width: {
      type: String,
      default: "100%",
    },
    height: {
      type: String,
      default: "4px",
    },
    fullScreenFlag:{
      type: Boolean,
      default: false,
    },
    // 当前进度，范围0-1
    currentProgress: {
      type: Number,
      default: 0,
    },
    isDrag:{
      type: Boolean,
      default: true,
    },
    blobId:{
      type: String,
    }
  },
  data() {
    return {
      is_mousedown_progress: false, //是否点击了进度条并保持点击状态
      current_width_px: 0, // 当前竖屏进度条的像素长度
	  current_height_px: 0, // 当前全屏进度条的像素长度
      init_clientX: 0, //竖屏初始进度的偏移量，相对于视口
	  init_clientY: 0, //全屏初始进度的偏移量，相对于视口
      dom_full: null, //完整进度条的dom，即进度条背景
    };
  },
  mounted() {
    //console.log(this.isDrag,'isDrag');
    //初始化一些固定数据
    let dom_full = this.$el.getElementsByClassName("progress-full")[0];
    this.dom_full = dom_full;
	// window.addEventListener("touchstart", (e) => {
	// 	console.log("touchstart::",this.is_mousedown_progress)
	//   //if (this.is_mousedown_progress) {
	//     this.down(e);
	//   //}
	// });
    //绑定全局监听器
    window.addEventListener("touchmove", (e) => {
		//console.log("touchmove::",this.is_mousedown_progress)
      if (this.is_mousedown_progress) {
			this.move(e);
			e.preventDefault();
      }
    },{ passive: false });
    window.addEventListener("touchend", (e) => {
		//console.log("touchend::",this.is_mousedown_progress)
      this.up(e);
	  // e.preventDefault();
    });
  },
  beforeDestroy() {
    //
  },
  methods: {
    start(e) {
        this.$emit("getMouseDownStatus", true);
        this.is_mousedown_progress = true;
		if(this.fullScreenFlag){
			// 全屏
			// 获取完整进度条的clientY（dom左上角）
			let init_clientY = this.dom_full.getBoundingClientRect().top;
			// 计算调整后的当前进度条的长度
			this.current_height_px = e.touches[0].clientY - init_clientY;
			// 设置当前的播放进度（同时作用于当前进度条的样式）
			let current = (e.touches[0].clientY - init_clientY) / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('start::',e,this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current,e.touches[0].clientY,init_clientY,this.dom_full.clientHeight,this.current_height_px,this.dom_full)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;

			this.$emit("updateProgress",'start', current);
		}else{
			// 横屏
			// 获取完整进度条的clientX（dom左上角）
			let init_clientX = this.dom_full.getBoundingClientRect().left;
			// 计算调整后的当前进度条的长度
			this.current_width_px = e.touches[0].clientX - init_clientX;
			// 设置当前的播放进度（同时作用于当前进度条的样式）
			let current = (e.touches[0].clientX - init_clientX) / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('start::',e,this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current,e.touches[0].clientX,init_clientX,this.dom_full.clientWidth)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;

			this.$emit("updateProgress",'start', current);
		}
    },
    move(e) {
      if (this.is_mousedown_progress) {
		if(this.fullScreenFlag){
			// 全屏
			let init_clientY = this.dom_full.getBoundingClientRect().top;
			this.current_height_px = e.touches[0].clientY - init_clientY;
			let current = (e.touches[0].clientY - init_clientY) / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('move::',e,this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current,this.dom_full)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;
			this.$emit("updateProgress",'move', current);
		}else{
			// 横屏
			let init_clientX = this.dom_full.getBoundingClientRect().left;
			this.current_width_px = e.touches[0].clientX - init_clientX;
			let current = (e.touches[0].clientX - init_clientX) / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('move::',e,this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;
			this.$emit("updateProgress",'move', current);
		}
      }
    },
    up() {
      if (this.is_mousedown_progress) {
		// 标记鼠标不处于按下的状态了
		this.is_mousedown_progress = false;
		this.$emit("getMouseDownStatus", false);
		if(this.fullScreenFlag){
			// 全屏
			// 松开鼠标后，即调整进度条后，此时的进度（0-1）
			let current = this.current_height_px / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('up::',this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current,this.dom_full)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;
			this.$emit("updateProgress",'end', current);
		}else{
			// 横屏
			// 松开鼠标后，即调整进度条后，此时的进度（0-1）
			let current = this.current_width_px / this.dom_full.clientWidth;
			if(current>1) current = 1;
			if(current<0) current = 0;
			var time = localStorage.getItem('videoProgressData');
			var arr = time&&JSON.parse(time) || {}
			//console.log('up::',this.isDrag,this.fullScreenFlag,time,arr[this.blobId] ,current)
			// 禁止拖动
			if(!this.isDrag && time && arr[this.blobId] < current) return;
			this.$emit("updateProgress",'end', current);
		}
      }
    },
  },
};
</script>

<style scoped>
.progress-bar {
  position: relative;
  cursor: pointer;
  padding: 2px 0;
  margin:  0;
  transition: height 0.2s;
  /*overflow: hidden;*/
}
.progress-bar:hover .progress-full {
  height: 2px !important;
}
.progress-full {
  position: relative;
  display: inline-block;
  width: 100%;
  background: rgb(201, 201, 201);
  transition: height 0.3s;
}
.progress-current {
  position: absolute;
  left: 0;
  top: 0;
  height: inherit;
  width: 0%;
  display: inline-block;
  background-color: var(--primaryColor);
}
.progress-current::after {
  content: "";
  position: absolute;
  display: inline-block;
  right: 0;
  top: 50%;
  bottom: 50%;
  width: 12px;
  height: 12px;
  border-radius: 100%;
  background: #fff;
  transform: translate(50%, -50%);
  opacity: 1;
  transition: opacity 0.3s;
}
.progress-bar:hover .progress-current::after {
  opacity: 1;
}
</style>