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

/*!
 * artplayer-tool-thumbnail.js v5.0.0
 * Github: https://github.com/zhw2590582/ArtPlayer
 * (c) 2017-2026 Harvey Zhao
 * Released under the MIT License.
 *
 * ArtPlayer thumbnail tool bundled third-party notices
 *
 * tiny-emitter - reference 2.1.0, locally adapted to a TypeScript class
 * https://github.com/scottcorgan/tiny-emitter/tree/2.1.0
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Scott Corgan
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
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Math.max(Math.min(e,Math.max(t,o)),Math.min(t,o))}function u(e){const t="workspace-4.4"===e.compatibility;return{delay:t?null:e.delay,aspectHeight:t,resetInput:t}}function d(e,t){let o=t.epoch;const c=e.video;let a,d,h,p,f=!1,m=!1,b=()=>{};const y=[],g=new Promise((e,t)=>{a=e,d=t});g.catch(()=>{});const v=()=>!f&&!t.closed&&t.epoch===o&&t.job===p;function w(){return!f&&(f=!0,t.job===p&&(t.job=null,e.processing=!1),s([()=>clearTimeout(h),b,...y.splice(0)]),!0)}function U(t,o=!0){if(!f){try{w()}catch(n){t||(t=n)}if(o)try{e.emit("error",t?.message)}catch(r){t=r}d(t)}}function E(){if(v())try{w(),e.emit("done"),a()}catch(t){let n=t;try{e.emit("error",t?.message)}catch(o){n=o}d(n)}}function T(t){if(!v())return;m=!0,e.processing=!0;let o=0;const r=()=>{if(!v())return;if(o===t.points.length)return void(null!==t.delay?h=setTimeout(E,2*Number(t.delay)):E());const s=t.points[o];let a=!1,l=!1,u=null===t.delay;const d=c.oncanplay,p=()=>{if(!(!v()||!u||a||c.seeking||void 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j(o=!1){if(v()&&!m)if(clearTimeout(h),!t.loading&&c.duration){m=!0;try{const t=function(e,t){const{video:o}=t,{width:n,number:r,begin:i,end:s}=e.option,c=u(e.option),a=c.aspectHeight?o.videoHeight/o.videoWidth*n:e.option.height,d=(o,n)=>{try{e.errorHandle(o,n)}catch(r){throw t.reported=r,t.wasReported=!0,r}};e.option.height=a,e.option.begin=l(i,0,o.duration),e.option.end=l(s||o.duration,i,o.duration),d(e.option.end>e.option.begin,"End time must be greater than the start time"),d(Number.isFinite(o.duration),"Video duration must be finite"),e.duration=e.option.end-e.option.begin,e.density=r/e.duration,d(e.file&&o,"Please select the video file first"),d(!e.processing,"There is currently a task in progress, please wait a moment..."),d(e.density<=1,`The preview density cannot be greater than 1, but got ${e.density}`);const h=e.creatScreenshotDate(),p=e.creatCanvas(),f=p.getContext("2d");return e.emit("canvas",p),{width:n,height:a,number:r,points:h,canvas:p,context:f,delay:c.delay}}(e,p);T(t)}catch(n){if(U(n,!o&&!(p.wasReported&&n===p.reported)),o)throw n}}else h=setTimeout(()=>j(),1e3),v()||clearTimeout(h)}p={video:c,promise:g,ready:j,fail:U,cancel(e){U(r(e),!1)},adopt:t=>!f&&!m&&c===e.video&&(o=t,!0)},t.job=p;try{for(const[e,t]of[["error",()=>{v()&&U(new Error(`Unable to load video: media error ${c.error?.code||0}`))}],["loadedmetadata",()=>j()],["durationchange",()=>j()]])if(y.push(()=>c.removeEventListener(e,t)),c.addEventListener(e,t),!v())return s([()=>c.removeEventListener(e,t),...y.splice(0)]),g;c.error?U(new Error(`Unable to load video: media error ${c.error.code}`)):j(!0)}catch(k){throw U(k,!1),k}return g}const h=new WeakMap;function p(e){let t;for(const[n,r]of 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t{constructor(e={}){super(),this.processing=!1,this.option={};try{this.setup(Object.assign({},y.DEFAULTS,e)),this.video=y.creatVideo(),n(this).video=this.video,this.duration=0,this.inputChange=this.inputChange.bind(this),this.ondrop=this.ondrop.bind(this),function(e,t){const o=h.get(e);o.callbacks=[["change",e.inputChange],["dragover",t],["drop",e.ondrop]],f(o,o.callbacks)}(this,y.ondragover)}catch(t){c(this,"construction failed");try{b(this)}catch{}try{a(this)}catch{}throw t}}static get DEFAULTS(){return{delay:300,number:60,width:160,height:90,column:10,begin:0,end:Number.NaN}}static ondragover(e){e.preventDefault()}ondrop(e){if(n(this).closed)return;e.preventDefault();const t=e.dataTransfer.files[0];this.loadVideo(t)}setup(e={}){return n(this).closed||m(this,e),this}static creatVideo(){const e=document.createElement("video");e.style.position="absolute",e.style.top="-9999px",e.style.left="-9999px",e.muted=!0,e.controls=!0;try{document.body.appendChild(e)}catch(t){throw e.parentNode&&e.parentNode.removeChild(e),t}return e}inputChange(e){if(n(this).closed)return;const{resetInput:t}=u(this.option),o=this.option.fileInput.files[0];this.loadVideo(o),t&&(e.target.value="")}loadVideo(e){!function(e,t){const o=n(e);if(!t||o.closed)return;const r=o.epoch,c=e.video,{delay:a}=u(e.option),l=c.canPlayType(t.type);if(e.errorHandle("maybe"===l||"probably"===l,`Playback of this file format is not supported: ${t.type}`),o.closed||o.epoch!==r)return;const d=URL.createObjectURL(t);if(o.sourceUrls.add(d),o.closed||o.epoch!==r)return void i(o.sourceUrls,d);const h=++o.epoch;!o.sourceUrl&&!e.file&&o.job?.adopt(h)||o.job?.cancel("source changed"),o.loading=!0;const p=()=>!o.closed&&o.epoch===h,f=o.sourceListeners,m=[];o.sourceListeners=m;let b,y=()=>{};const g=()=>clearTimeout(b);m.push(g);let v=!1;const w=()=>{if(!p()||v||c.currentSrc&&c.currentSrc!==d)return;v=!0,g(),o.loading=!1;const t=new Error(`Unable to load video: media error ${c.error?.code||0}`);o.job?o.job.fail(t):e.emit("error",t.message)},U=()=>{!p()||c.currentSrc&&c.currentSrc!==d||(o.loading=!1,o.job?.ready())};try{if(s(f.splice(0)),!p())return void i(o.sourceUrls,d);for(const[e,t]of[["error",w],["loadedmetadata",U]])if(y=()=>c.removeEventListener(e,t),m.push(y),c.addEventListener(e,t),!p())return s([y,...m.splice(0)]),void i(o.sourceUrls,d);if(e.videoUrl=d,e.file=t,e.emit("file",t),!p())return void i(o.sourceUrls,d);if(c.src=d,!p())return void i(o.sourceUrls,d);o.sourceUrl=d;for(const e of[...o.sourceUrls])e!==d&&i(o.sourceUrls,e);p()&&!v&&(null!==a?(b=setTimeout(()=>{g(),p()&&!v&&e.emit("video",c)},a),p()&&!v||g()):e.emit("video",c))}catch(E){p()&&(o.loading=!1,o.job?.cancel("source setup failed"));try{s([y,...m.splice(0)])}catch{}throw i(o.sourceUrls,d),E}}(this,e)}start(){return function(e){const t=n(e);if(t.closed){const e=Promise.reject(r("destroyed"));return e.catch(()=>{}),e}return e.errorHandle(!t.job,"There is currently a task in progress, please wait a moment..."),d(e,t)}(this)}creatScreenshotDate(){return function(e,t){const{number:o,width:n,height:r,column:i,begin:s}=e,c=t/o,a=[s+c];for(;a.length<o;){const e=a[a.length-1];a.push(e+c)}return a.map((e,t)=>({time:e-c/2,x:t%i*n,y:Math.floor(t/i)*r}))}(this.option,this.duration)}creatCanvas(){return function(e){const{number:t,width:o,height:n,column:r}=e,i=document.createElement("canvas"),s=i.getContext("2d");return i.width=o*r,i.height=Math.ceil(t/r)*n+30,s.fillStyle="black",s.fillRect(0,0,i.width,i.height),s.font="14px Georgia",s.fillStyle="#fff",s.fillText(`From: https://artplayer.org/, Number: ${t}, Width: ${o}, Height: ${n}, Column: ${r}`,10,i.height-11),i}(this.option)}download(){if(n(this).closed)return this;this.errorHandle(this.file&&this.thumbnailUrl,"Download does not seem to be ready, please create preview first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment...");const e=function(e,t){const o=document.createElement("a"),n=`${function(e){const t=e.split(".");return t.pop(),t.join(".")}(e.name)}.png`;o.download=n,o.href=t;try{document.body.appendChild(o),o.click()}finally{o.parentNode&&o.parentNode.removeChild(o)}return n}(this.file,this.thumbnailUrl);return this.emit("download",e),this}errorHandle(e,t){if(!e)throw this.emit("error",t),new Error(t)}destroy(){c(this)&&s([()=>b(this),()=>a(this),()=>this.emit("destroy")])}}return y});