mirror of
https://github.com/zhw2590582/ArtPlayer.git
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8 lines
6.8 KiB
JavaScript
8 lines
6.8 KiB
JavaScript
/*!
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* artplayer-tool-thumbnail.js v4.4.0
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* Github: https://github.com/zhw2590582/ArtPlayer
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* (c) 2017-2026 Harvey Zhao
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* Released under the MIT License.
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*/
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!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))}const i=new WeakMap;function n(t){let e;for(const[n,o]of t.listeners.splice(0))try{t.input.removeEventListener(n,o)}catch(i){e||(e=i)}if(t.wrapper){try{t.input.parentNode&&t.input.parentNode.removeChild(t.input)}catch(i){e||(e=i)}"relative"===t.wrapper.style.position&&(t.wrapper.style.position=t.position)}if(e)throw e}function o(t,e){try{for(const[i,n]of e)t.listeners.push([i,n]),t.input.addEventListener(i,n)}catch(i){try{n(t)}catch{}throw i}}function s(t){const e=i.get(t);e&&(i.delete(t),n(e))}const r=new WeakSet;class h extends t{constructor(t={}){super(),this.processing=!1,this.option={};try{this.setup(Object.assign({},h.DEFAULTS,t)),this.video=h.creatVideo(),this.duration=0,this.inputChange=this.inputChange.bind(this),this.ondrop=this.ondrop.bind(this),function(t,e){const n=i.get(t);n.callbacks=[["change",t.inputChange],["dragover",e],["drop",t.ondrop]],o(n,n.callbacks)}(this,h.ondragover)}catch(e){try{s(this)}catch{}try{this.video?.parentNode&&this.video.parentNode.removeChild(this.video)}catch{}throw e}}static get DEFAULTS(){return{number:60,width:160,height:90,column:10,begin:0,end:Number.NaN}}static ondragover(t){t.preventDefault()}ondrop(t){if(r.has(this))return;t.preventDefault();const e=t.dataTransfer.files[0];this.loadVideo(e)}setup(t={}){return r.has(this)||(this.option=function(t,s){const r=Object.assign({},t.option,s),h=r.fileInput;t.errorHandle(h instanceof Element,"The 'fileInput' is not a Element");for(const e of["number","width","column","begin","end"])t.errorHandle("number"===typeof r[e],`The '${e}' is not a number`);r.number=e(r.number,10,1e3),r.width=e(r.width,10,1e3),r.column=e(r.column,1,1e3);const a=i.get(t);if(a&&(h===a.input||h===a.wrapper))return r.fileInput=a.input,r;const l={input:h,wrapper:null,position:"",listeners:[],callbacks:a?.callbacks||null};try{"INPUT"===h.tagName&&"file"===h.type||(l.wrapper=h,l.position=h.style.position,l.input=document.createElement("input"),l.input.type="file",Object.assign(l.input.style,{position:"absolute",width:"100%",height:"100%",left:"0",top:"0",right:"0",bottom:"0",opacity:"0"}),h.style.position="relative",h.appendChild(l.input)),l.callbacks&&o(l,l.callbacks)}catch(c){try{n(l)}catch{}throw c}return r.fileInput=l.input,i.set(t,l),t.option=r,a&&n(a),r}(this,t)),this}static creatVideo(){const t=document.createElement("video");t.style.position="absolute",t.style.top="-9999px",t.style.left="-9999px",t.muted=!0,t.controls=!0;try{document.body.appendChild(t)}catch(e){throw t.parentNode&&t.parentNode.removeChild(t),e}return t}inputChange(t){if(r.has(this))return;const e=this.option.fileInput.files[0];this.loadVideo(e),t.target.value=""}loadVideo(t){if(t&&!r.has(this)){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 c=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,(d=c,d.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 d}creatScreenshotDate(){return function(t,e){const{number:i,width:n,height:o,column:s,begin:r}=t,h=e/i,a=[r+h];for(;a.length<i;){const t=a[a.length-1];a.push(t+h)}return a.map((t,e)=>({time:t-h/2,x:e%s*n,y:Math.floor(e/s)*o}))}(this.option,this.duration)}creatCanvas(){return function(t){const{number:e,width:i,height:n,column:o}=t,s=document.createElement("canvas"),r=s.getContext("2d");return s.width=i*o,s.height=Math.ceil(e/o)*n+30,r.fillStyle="black",r.fillRect(0,0,s.width,s.height),r.font="14px Georgia",r.fillStyle="#fff",r.fillText(`From: https://artplayer.org/, Number: ${e}, Width: ${i}, Height: ${n}, Column: ${o}`,10,s.height-11),s}(this.option)}download(){this.errorHandle(this.file&&this.thumbnailUrl,"Download does not seem to be ready, please create preview first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment...");const t=function(t,e){const i=document.createElement("a"),n=`${function(t){const e=t.split(".");return e.pop(),e.join(".")}(t.name)}.png`;i.download=n,i.href=e;try{document.body.appendChild(i),i.click()}finally{i.parentNode&&i.parentNode.removeChild(i)}return n}(this.file,this.thumbnailUrl);return this.emit("download",t),this}errorHandle(t,e){if(!t)throw this.emit("error",e),new Error(e)}destroy(){if(r.has(this))return;let t;r.add(this);for(const i of[()=>s(this),()=>this.video.parentNode?.removeChild(this.video),()=>this.videoUrl&&URL.revokeObjectURL(this.videoUrl),()=>this.thumbnailUrl&&URL.revokeObjectURL(this.thumbnailUrl),()=>this.emit("destroy")])try{i()}catch(e){t||(t=e)}if(t)throw t}}return h});
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