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

/*!
 * artplayer-tool-thumbnail.js v4.4.0
 * 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.
 */
!function(e,t){"object"===typeof exports&&"undefined"!==typeof module?module.exports=t():"function"==typeof define&&define.amd?(e.ArtplayerToolThumbnail=t(),define(function(){return e.ArtplayerToolThumbnail})):(e="undefined"!==typeof globalThis?globalThis:e||self).ArtplayerToolThumbnail=t()}(this,function(){"use strict";const e=(e,t)=>Object.prototype.hasOwnProperty.call(e,t);class t{on(t,n,r){const o=this.e||(this.e={});let i=e(o,t)?o[t]:void 0;return i||(i=[],Object.defineProperty(o,t,{value:i,enumerable:!0,configurable:!0,writable:!0})),i.push({fn:n,ctx:r}),this}once(e,t,n){const r=this,o=t;let i=!1;function s(...t){i||(i=!0,r.off(e,s),o.apply(n,t))}return s._=t,this.on(e,s,n)}emit(t,...n){const r=this.e||(this.e={}),o=(e(r,t)&&r[t]||[]).slice();for(let e=0;e<o.length;e+=1)o[e].fn.apply(o[e].ctx,n);return this}off(t,n){const r=this.e||(this.e={}),o=e(r,t)?r[t]:void 0,i=[];if(o&&n)for(let e=0,s=o.length;e<s;e+=1)o[e].fn!==n&&o[e].fn._!==n&&i.push(o[e]);return i.length?r[t]=i:delete r[t],this}}const n=new WeakMap;function r(e){return n.has(e)||n.set(e,{closed:!1,epoch:0,inputEpoch:0,job:null,video:null,sourceUrl:null,thumbnailUrl:null,sourceUrls:new Set,thumbnailUrls:new Set,sourceListeners:[],loading:!1}),n.get(e)}function o(e){const t=new Error(`Thumbnail task cancelled: ${e}`);return t.name="AbortError",t}function i(e,t){t&&(e.delete(t),URL.revokeObjectURL(t))}function s(e){let t,n=!1;for(const o of e)try{o()}catch(r){n||(n=!0,t=r)}if(n)throw t}function c(e,t="destroyed"){const n=r(e);return!n.closed&&(n.closed=!0,n.epoch++,n.job?.cancel(t),!0)}function a(e){const t=r(e),n=new Set([...t.sourceUrls,e.videoUrl]),o=new Set([...t.thumbnailUrls,e.thumbnailUrl]),c=[];for(const r of new Set([t.video,e.video]))r&&c.push(()=>r.pause?.(),()=>r.removeAttribute?.("src"),()=>r.load?.(),()=>r.parentNode?.removeChild(r));s([...t.sourceListeners.splice(0),...c,...[...n].map(e=>()=>i(t.sourceUrls,e)),...[...o].map(e=>()=>i(t.thumbnailUrls,e))])}function l(e,t,n){return Math.max(Math.min(e,Math.max(t,n)),Math.min(t,n))}function u(e,t){let n=t.epoch;const c=e.video;let a,u,d,h,p=!1,f=!1,m=()=>{};const b=[],y=new Promise((e,t)=>{a=e,u=t});y.catch(()=>{});const g=()=>!p&&!t.closed&&t.epoch===n&&t.job===h;function v(){return!p&&(p=!0,t.job===h&&(t.job=null,e.processing=!1),s([()=>clearTimeout(d),m,...b.splice(0)]),!0)}function w(t,n=!0){if(!p){try{v()}catch(r){t||(t=r)}if(n)try{e.emit("error",t?.message)}catch(o){t=o}u(t)}}function U(t){if(!g())return;f=!0,e.processing=!0;let n=0;const o=()=>{if(!g())return;if(n===t.points.length)return void function(){if(g())try{v(),e.emit("done"),a()}catch(t){let r=t;try{e.emit("error",t?.message)}catch(n){r=n}u(r)}}();const s=t.points[n];let l=!1,d=!1;const h=c.oncanplay,p=()=>{if(!(!g()||l||c.seeking||void 0!==c.readyState&&c.readyState<2)){l=!0;try{if(m(),t.context.drawImage(c,s.x,s.y,t.width,t.height),!g())return;t.canvas.toBlob(s=>{if(g()&&!d){d=!0;try{if(!s)throw new Error("Unable to create thumbnail image");const c=function(e,t,n){const o=r(e),s=URL.createObjectURL(t);if(o.thumbnailUrls.add(s),!n())return i(o.thumbnailUrls,s),null;const c=new Set([...o.thumbnailUrls,e.thumbnailUrl]);o.thumbnailUrl=s,e.thumbnailUrl=s;for(const r of c)r&&r!==s&&i(o.thumbnailUrls,r);return n()?s:null}(e,s,g);if(!c)return;e.emit("update",c,(n+1)/t.number),n++,Promise.resolve().then(o)}catch(c){w(c)}}})}catch(a){w(a)}}};m=()=>{c.oncanplay===p&&(c.oncanplay=h),c.removeEventListener("seeked",p)};try{c.oncanplay=p,c.addEventListener("seeked",p),c.currentTime=s.time,c.readyState>=2&&!c.seeking&&Promise.resolve().then(p)}catch(f){w(f)}};Promise.resolve().then(o)}function E(n=!1){if(g()&&!f)if(clearTimeout(d),!t.loading&&c.duration){f=!0;try{const t=function(e,t){const{video:n}=t,{width:r,number:o,begin:i,end:s}=e.option,c=n.videoHeight/n.videoWidth*r,a=(n,r)=>{try{e.errorHandle(n,r)}catch(o){throw t.reported=o,t.wasReported=!0,o}};e.option.height=c,e.option.begin=l(i,0,n.duration),e.option.end=l(s||n.duration,i,n.duration),a(e.option.end>e.option.begin,"End time must be greater than the start time"),a(Number.isFinite(n.duration),"Video duration must be finite"),e.duration=e.option.end-e.option.begin,e.density=o/e.duration,a(e.file&&n,"Please select the video file first"),a(!e.processing,"There is currently a task in progress, please wait a moment..."),a(e.density<=1,`The preview density cannot be greater than 1, but got ${e.density}`);const u=e.creatScreenshotDate(),d=e.creatCanvas(),h=d.getContext("2d");return e.emit("canvas",d),{width:r,height:c,number:o,points:u,canvas:d,context:h}}(e,h);U(t)}catch(r){if(w(r,!n&&!(h.wasReported&&r===h.reported)),n)throw r}}else d=setTimeout(()=>E(),1e3),g()||clearTimeout(d)}h={video:c,promise:y,ready:E,fail:w,cancel(e){w(o(e),!1)},adopt:t=>!p&&!f&&c===e.video&&(n=t,!0)},t.job=h;try{for(const[e,t]of[["error",()=>{g()&&w(new Error(`Unable to load video: media error ${c.error?.code||0}`))}],["loadedmetadata",()=>E()],["durationchange",()=>E()]])if(b.push(()=>c.removeEventListener(e,t)),c.addEventListener(e,t),!g())return s([()=>c.removeEventListener(e,t),...b.splice(0)]),y;c.error?w(new Error(`Unable to load video: media error ${c.error.code}`)):E(!0)}catch(j){throw w(j,!1),j}return y}const d=new WeakMap;function h(e){let t;for(const[r,o]of e.listeners.splice(0))try{e.input.removeEventListener(r,o)}catch(n){t||(t=n)}if(e.wrapper){try{e.input.parentNode&&e.input.parentNode.removeChild(e.input)}catch(n){t||(t=n)}"relative"===e.wrapper.style.position&&(e.wrapper.style.position=e.position)}if(t)throw t}function p(e,t){try{for(const[n,r]of t)e.listeners.push([n,r]),e.input.addEventListener(n,r)}catch(n){try{h(e)}catch{}throw n}}function f(e){const t=d.get(e);t&&(d.delete(e),h(t))}class m extends t{constructor(e={}){super(),this.processing=!1,this.option={};try{this.setup(Object.assign({},m.DEFAULTS,e)),this.video=m.creatVideo(),r(this).video=this.video,this.duration=0,this.inputChange=this.inputChange.bind(this),this.ondrop=this.ondrop.bind(this),function(e,t){const n=d.get(e);n.callbacks=[["change",e.inputChange],["dragover",t],["drop",e.ondrop]],p(n,n.callbacks)}(this,m.ondragover)}catch(t){c(this,"construction failed");try{f(this)}catch{}try{a(this)}catch{}throw t}}static get DEFAULTS(){return{number:60,width:160,height:90,column:10,begin:0,end:Number.NaN}}static ondragover(e){e.preventDefault()}ondrop(e){if(r(this).closed)return;e.preventDefault();const t=e.dataTransfer.files[0];this.loadVideo(t)}setup(e={}){return r(this).closed||function(e,t){const n=r(e),i=++n.inputEpoch,s=()=>!n.closed&&n.inputEpoch===i,c=Object.assign({},e.option,t),a=c.fileInput;e.errorHandle(a instanceof Element,"The 'fileInput' is not a Element");for(const r of["number","width","column","begin","end"])e.errorHandle("number"===typeof c[r],`The '${r}' is not a number`);if(c.number=l(c.number,10,1e3),c.width=l(c.width,10,1e3),c.column=l(c.column,1,1e3),!s())throw o("input setup superseded");const u=d.get(e);if(u&&(a===u.input||a===u.wrapper))return c.fileInput=u.input,e.option=c,c;const f={input:a,wrapper:null,position:"",listeners:[],callbacks:u?.callbacks||null};try{if("INPUT"===a.tagName&&"file"===a.type||(f.wrapper=a,f.position=a.style.position,f.input=document.createElement("input"),f.input.type="file",Object.assign(f.input.style,{position:"absolute",width:"100%",height:"100%",left:"0",top:"0",right:"0",bottom:"0",opacity:"0"}),a.style.position="relative",a.appendChild(f.input)),!s())throw o("input setup superseded");if(f.callbacks&&p(f,f.callbacks),!s())throw o("input setup superseded")}catch(m){try{h(f)}catch{}throw m}c.fileInput=f.input,d.set(e,f),e.option=c,u&&h(u)}(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(r(this).closed)return;const t=this.option.fileInput.files[0];this.loadVideo(t),e.target.value=""}loadVideo(e){!function(e,t){const n=r(e);if(!t||n.closed)return;const o=n.epoch,c=e.video,a=c.canPlayType(t.type);if(e.errorHandle("maybe"===a||"probably"===a,`Playback of this file format is not supported: ${t.type}`),n.closed||n.epoch!==o)return;const l=URL.createObjectURL(t);if(n.sourceUrls.add(l),n.closed||n.epoch!==o)return void i(n.sourceUrls,l);const u=++n.epoch;!n.sourceUrl&&!e.file&&n.job?.adopt(u)||n.job?.cancel("source changed"),n.loading=!0;const d=()=>!n.closed&&n.epoch===u,h=n.sourceListeners,p=[];n.sourceListeners=p;let f=()=>{},m=!1;const b=()=>{if(!d()||m||c.currentSrc&&c.currentSrc!==l)return;m=!0,n.loading=!1;const t=new Error(`Unable to load video: media error ${c.error?.code||0}`);n.job?n.job.fail(t):e.emit("error",t.message)},y=()=>{!d()||c.currentSrc&&c.currentSrc!==l||(n.loading=!1,n.job?.ready())};try{if(s(h.splice(0)),!d())return void i(n.sourceUrls,l);for(const[e,t]of[["error",b],["loadedmetadata",y]])if(f=()=>c.removeEventListener(e,t),p.push(f),c.addEventListener(e,t),!d())return s([f,...p.splice(0)]),void i(n.sourceUrls,l);if(e.videoUrl=l,e.file=t,e.emit("file",t),!d())return void i(n.sourceUrls,l);if(c.src=l,!d())return void i(n.sourceUrls,l);n.sourceUrl=l;for(const e of[...n.sourceUrls])e!==l&&i(n.sourceUrls,e);d()&&e.emit("video",c)}catch(g){d()&&(n.loading=!1,n.job?.cancel("source setup failed"));try{s([f,...p.splice(0)])}catch{}throw i(n.sourceUrls,l),g}}(this,e)}start(){return function(e){const t=r(e);if(t.closed){const e=Promise.reject(o("destroyed"));return e.catch(()=>{}),e}return e.errorHandle(!t.job,"There is currently a task in progress, please wait a moment..."),u(e,t)}(this)}creatScreenshotDate(){return function(e,t){const{number:n,width:r,height:o,column:i,begin:s}=e,c=t/n,a=[s+c];for(;a.length<n;){const e=a[a.length-1];a.push(e+c)}return a.map((e,t)=>({time:e-c/2,x:t%i*r,y:Math.floor(t/i)*o}))}(this.option,this.duration)}creatCanvas(){return function(e){const{number:t,width:n,height:r,column:o}=e,i=document.createElement("canvas"),s=i.getContext("2d");return i.width=n*o,i.height=Math.ceil(t/o)*r+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: ${n}, Height: ${r}, Column: ${o}`,10,i.height-11),i}(this.option)}download(){if(r(this).closed)return this;this.errorHandle(this.file&&this.thumbnailUrl,"Download does not seem to be ready, please create preview first"),this.errorHandle(!this.processing,"There is currently a task in progress, please wait a moment...");const e=function(e,t){const n=document.createElement("a"),r=`${function(e){const t=e.split(".");return t.pop(),t.join(".")}(e.name)}.png`;n.download=r,n.href=t;try{document.body.appendChild(n),n.click()}finally{n.parentNode&&n.parentNode.removeChild(n)}return r}(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([()=>f(this),()=>a(this),()=>this.emit("destroy")])}}return m});