refactor(thumbnail): [PKG-TOOL-THUMB-03] own extraction jobs and source cancellation

docs/compiled/artplayer-tool-thumbnail.js

@@ -4,4 +4,4 @@
  * (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))}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.videLine truncated
+!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";class e{on(e,t,n){const r=this.e||(this.e={});return(r[e]||(r[e]=[])).push({fn:t,ctx:n}),this}once(e,t,n){const r=this;function o(...i){r.off(e,o),t.apply(n,i)}return o._=t,this.on(e,o,n)}emit(e,...t){const n=((this.e||(this.e={}))[e]||[]).slice();for(let r=0;r<n.length;r+=1)n[r].fn.apply(n[r].ctx,t);return this}off(e,t){const n=this.e||(this.e={}),r=n[e],o=[];if(r&&t)for(let i=0,s=r.length;i<s;i+=1)r[i].fn!==t&&r[i].fn._!==t&&o.push(r[i]);return o.length?n[e]=o:delete n[e],this}}const t=new WeakMap;function n(e){return t.has(e)||t.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}),t.get(e)}function r(e){const t=new Error(`Thumbnail task cancelled: ${e}`);return t.name="AbortError",t}function o(e,t){t&&(e.delete(t),URL.revokeObjectURL(t))}function i(e){let t;for(const r of e)try{r()}catch(n){t||(t=n)}if(t)throw t}function s(e,t="destroyed"){const r=n(e);return!r.closed&&(r.closed=!0,r.epoch++,r.job?.cancel(t),!0)}function c(e){const t=n(e),r=new Set([...t.sourceUrls,e.videoUrl]),s=new Set([...t.thumbnailUrls,e.thumbnailUrl]),c=[];for(const n of new Set([t.video,e.video]))n&&c.push(()=>n.pause?.(),()=>n.removeAttribute?.("src"),()=>n.load?.(),()=>n.parentNode?.removeChild(n));i([...t.sourceListeners.splice(0),...c,...[...r].map(e=>()=>o(t.sourceUrls,e)),...[...s].map(e=>()=>o(t.thumbnailUrls,e))])}function a(e,t,n){return Math.max(Math.min(e,Math.max(t,n)),Math.min(t,n))}function l(e,t){let s=t.epoch;const c=e.video;let l,u,d,h,p=!1,f=!1,m=()=>{};const b=[],y=new Promise((e,t)=>{l=e,u=t});y.catch(()=>{});const g=()=>!p&&!t.closed&&t.epoch===s&&t.job===h;function v(){return!p&&(p=!0,t.job===h&&(t.job=null,e.processing=!1),i([()=>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 r=0;const i=()=>{if(!g())return;if(r===t.points.length)return void function(){if(g())try{v(),e.emit("done"),l()}catch(t){let r=t;try{e.emit("error",t?.message)}catch(n){r=n}u(r)}}();const s=t.points[r];let a=!1,d=!1;const h=c.oncanplay,p=()=>{if(!(!g()||a||c.seeking||void 0!==c.readyState&&c.readyState<2)){a=!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,r){const i=n(e),s=URL.createObjectURL(t);if(i.thumbnailUrls.add(s),!r())return o(i.thumbnailUrls,s),null;const c=new Set([...i.thumbnailUrls,e.thumbnailUrl]);i.thumbnailUrl=s,e.thumbnailUrl=s;for(const n of c)n&&n!==s&&o(i.thumbnailUrls,n);return r()?s:null}(e,s,g);if(!c)return;e.emit("update",c,(r+1)/t.number),r++,Promise.resolve().then(i)}catch(c){w(c)}}})}catch(l){w(l)}}};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(i)}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,l=(n,r)=>{try{e.errorHandle(n,r)}catch(o){throw t.reported=o,t.wasReported=!0,o}};e.option.height=c,e.option.begin=a(i,0,n.duration),e.option.end=a(s||n.duration,i,n.duration),l(e.option.end>e.option.begin,"End time must be greater than the start time"),l(Number.isFinite(n.duration),"Video duration must be finite"),e.duration=e.option.end-e.option.begin,e.density=o/e.duration,l(e.file&&n,"Please select the video file first"),l(!e.processing,"There is currently a task in progress, please wait a moment..."),l(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(r(e),!1)},adopt:t=>!p&&!f&&c===e.video&&(s=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 i([()=>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 
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