ArtPlayer/docs/compiled/artplayer-tool-thumbnail.legacy.js

/*!
 * artplayer-tool-thumbnail.js v4.4.0
 * Github: https://github.com/zhw2590582/ArtPlayer
 * (c) 2017-2026 Harvey Zhao
 * Released under the MIT License.
 */
!function(t,e){"object"===typeof exports&&"undefined"!==typeof module?module.exports=e():"function"==typeof define&&define.amd?(t.ArtplayerToolThumbnail=e(),define(function(){return t.ArtplayerToolThumbnail})):(t="undefined"!==typeof globalThis?globalThis:t||self).ArtplayerToolThumbnail=e()}(this,function(){"use strict";class t{on(t,e,i){const n=this.e||(this.e={});return(n[t]||(n[t]=[])).push({fn:e,ctx:i}),this}once(t,e,i){const n=this;function o(...s){n.off(t,o),e.apply(i,s)}return o._=e,this.on(t,o,i)}emit(t,...e){const i=((this.e||(this.e={}))[t]||[]).slice();for(let n=0;n<i.length;n+=1)i[n].fn.apply(i[n].ctx,e);return this}off(t,e){const i=this.e||(this.e={}),n=i[t],o=[];if(n&&e)for(let s=0,r=n.length;s<r;s+=1)n[s].fn!==e&&n[s].fn._!==e&&o.push(n[s]);return o.length?i[t]=o:delete i[t],this}}function e(t,e,i){return Math.max(Math.min(t,Math.max(e,i)),Math.min(e,i))}class i extends t{constructor(t={}){super(),this.processing=!1,this.option={},this.setup(Object.assign({},i.DEFAULTS,t)),this.video=i.creatVideo(),this.duration=0,this.inputChange=this.inputChange.bind(this),this.ondrop=this.ondrop.bind(this),this.option.fileInput.addEventListener("change",this.inputChange),this.option.fileInput.addEventListener("dragover",i.ondragover),this.option.fileInput.addEventListener("drop",i.ondrop)}static get DEFAULTS(){return{number:60,width:160,height:90,column:10,begin:0,end:Number.NaN}}static ondragover(t){t.preventDefault()}ondrop(t){t.preventDefault();const e=t.dataTransfer.files[0];this.loadVideo(e)}setup(t={}){this.option=Object.assign({},this.option,t);const{fileInput:i,number:n,width:o,column:s}=this.option;if(this.errorHandle(i instanceof Element,"The 'fileInput' is not a Element"),"INPUT"!==i.tagName||"file"!==i.type){i.style.position="relative";const t=document.createElement("input");t.type="file",t.style.position="absolute",t.style.width="100%",t.style.height="100%",t.style.left="0",t.style.top="0",t.style.right="0",t.style.bottom="0",t.style.opacity="0",i.appendChild(t),this.option.fileInput=t}return["number","width","column","begin","end"].forEach(t=>{this.errorHandle("number"===typeof this.option[t],`The '${t}' is not a number`)}),this.option.number=e(n,10,1e3),this.option.width=e(o,10,1e3),this.option.column=e(s,1,1e3),this}static creatVideo(){const t=document.createElement("video");return t.style.position="absolute",t.style.top="-9999px",t.style.left="-9999px",t.muted=!0,t.controls=!0,document.body.appendChild(t),t}inputChange(t){const e=this.option.fileInput.files[0];this.loadVideo(e),t.target.value=""}loadVideo(t){if(t){const e=this.video.canPlayType(t.type);this.errorHandle("maybe"===e||"probably"===e,`Playback of this file format is not supported: ${t.type}`);const i=URL.createObjectURL(t);this.videoUrl=i,this.file=t,this.emit("file",this.file),this.video.src=i,this.emit("video",this.video)}}start(){if(!this.video.duration)return(t=1e3,new Promise(e=>setTimeout(e,t))).then(()=>this.start());var t;const{width:i,number:n,begin:o,end:s}=this.option,r=this.video.videoHeight/this.video.videoWidth*i;this.option.height=r,this.option.begin=e(o,0,this.video.duration),this.option.end=e(s||this.video.duration,o,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=n/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 h=this.creatScreenshotDate(),a=this.creatCanvas(),l=a.getContext("2d");this.emit("canvas",a);const d=h.map((t,e)=>()=>new Promise(o=>{this.video.oncanplay=()=>{l.drawImage(this.video,t.x,t.y,i,r),a.toBlob(t=>{this.thumbnailUrl&&URL.revokeObjectURL(this.thumbnailUrl),this.thumbnailUrl=URL.createObjectURL(t),this.emit("update",this.thumbnailUrl,(e+1)/n),this.video.oncanplay=null,o()})},this.video.currentTime=t.time}));return this.processing=!0,(p=d,p.reduce((t,e)=>t.then(e),Promise.resolve())).then(()=>{this.processing=!1,this.emit("done")}).catch(t=>{throw this.processing=!1,this.emit("error",t.message),t});var p}creatScreenshotDate(){const{number:t,width:e,height:i,column:n,begin:o}=this.option,s=this.duration/t,r=[o+s];for(;r.length<t;){const t=r[r.length-1];r.push(t+s)}return r.map((t,o)=>({time:t-s/2,x:o%n*e,y:Math.floor(o/n)*i}))}creatCanvas(){const{number:t,width:e,height:i,column:n}=this.option,o=document.createElement("canvas"),s=o.getContext("2d");return o.width=e*n,o.height=Math.ceil(t/n)*i+30,s.fillStyle="black",s.fillRect(0,0,o.width,o.height),s.font="14px Georgia",s.fillStyle="#fff",s.fillText(`From: https://artplayer.org/, Number: ${t}, Width: ${e}, Height: ${i}, Column: ${n}`,10,o.height-11),o}download(){this.errorHandle(this.file&&this.thumbnailUrl,"Download does not seem to be ready, please create preview first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment...");const t=document.createElement("a"),e=`${function(t){const e=t.split(".");return e.pop(),e.join(".")}(this.file.name)}.png`;return t.download=e,t.href=this.thumbnailUrl,document.body.appendChild(t),t.click(),document.body.removeChild(t),this.emit("download",e),this}errorHandle(t,e){if(!t)throw this.emit("error",e),new Error(e)}destroy(){this.option.fileInput.removeEventListener("change",this.inputChange),this.option.fileInput.removeEventListener("dragover",i.ondragover),this.option.fileInput.removeEventListener("drop",i.ondrop),document.body.removeChild(this.video),this.videoUrl&&URL.revokeObjectURL(this.videoUrl),this.thumbnailUrl&&URL.revokeObjectURL(this.thumbnailUrl),this.emit("destroy")}}return i});