/*!
 * artplayer-tool-thumbnail.js v4.3.12
 * Github: https://github.com/zhw2590582/ArtPlayer
 * (c) 2017-2022 Harvey Zack
 * Released under the MIT License.
 */
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i=URL.createObjectURL(e);this.videoUrl=i,this.file=e,this.emit("file",this.file),this.video.src=i,this.emit("video",this.video)}}start(){if(!this.video.duration)return s.sleep(1e3).then((()=>this.start()));const{width:e,number:t,begin:i,end:n}=this.option,o=this.video.videoHeight/this.video.videoWidth*e;this.option.height=o,this.option.begin=s.clamp(i,0,this.video.duration),this.option.end=s.clamp(n||this.video.duration,i,this.video.duration),this.errorHandle(this.option.end>this.option.begin,"End time must be greater than the start time"),this.duration=this.option.end-this.option.begin,this.density=t/this.duration,this.errorHandle(this.file&&this.video,"Please select the video file first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment..."),this.errorHandle(this.density<=1,`The preview density cannot be greater than 1, but got ${this.density}`);const r=this.creatScreenshotDate(),l=this.creatCanvas(),a=l.getContext("2d");this.emit("canvas",l);const h=r.map(((i,n)=>()=>new Promise((r=>{this.video.oncanplay=()=>{a.drawImage(this.video,i.x,i.y,e,o),l.toBlob((e=>{this.thumbnailUrl&&URL.revokeObjectURL(this.thumbnailUrl),this.thumbnailUrl=URL.createObjectURL(e),this.emit("update",this.thumbnailUrl,(n+1)/t),this.video.oncanplay=null,r()}))},this.video.currentTime=i.time}))));return this.processing=!0,s.runPromisesInSeries(h).then((()=>{this.processing=!1,this.emit("done")})).catch((e=>{throw this.processing=!1,this.emit("error",e.message),e}))}creatScreenshotDate(){const{number:e,width:t,height:i,column:n,begin:o}=this.option,r=this.duration/e,s=[o+r];for(;s.length<e;){const e=s[s.length-1];s.push(e+r)}return s.map(((e,o)=>({time:e-r/2,x:o%n*t,y:Math.floor(o/n)*i})))}creatCanvas(){const{number:e,width:t,height:i,column:n}=this.option,o=document.createElement("canvas"),r=o.getContext("2d");return o.width=t*n,o.height=Math.ceil(e/n)*i+30,r.fillStyle="black",r.fillRect(0,0,o.width,o.height),r.font="14px Georgia",r.fillStyle="#fff",r.fillText(`From: https://artplayer.org/, Number: ${e}, Width: ${t}, Height: ${i}, Column: ${n}`,10,o.height-11),o}download(){this.errorHandle(this.file&&this.thumbnailUrl,"Download does not seem to be ready, please create preview first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment...");const e=document.createElement("a"),t=`${s.getFileName(this.file.name)}.png`;return e.download=t,e.href=this.thumbnailUrl,document.body.appendChild(e),e.click(),document.body.removeChild(e),this.emit("download",t),this}errorHandle(e,t){if(!e)throw this.emit("error",t),new 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