/*!
 * artplayer-tool-thumbnail.js v1.0.5
 * Github: https://github.com/zhw2590582/ArtPlayer#readme
 * (c) 2017-2018 Harvey Zack
 * Released under the MIT License.
 */

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i=URL.createObjectURL(o);this.videoUrl=i,this.file=o,this.emit("file",this.file),this.video.src=i,p(t).then(function(){e.emit("video",e.video)}).catch(function(t){e.emit("error",t.message),console.error(t)})}}},{key:"start",value:function(){var n=this,t=this.option,o=t.width,i=t.height,r=t.number,u=t.delay;this.density=r/this.video.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 ".concat(this.density));var e=this.creatScreenshotDate(),a=this.creatCanvas(),s=a.getContext("2d");this.emit("canvas",a);var c,l=e.map(function(t,e){return function(){return n.video.currentTime=t.time,p(u).then(function(){s.drawImage(n.video,t.x,t.y,o,i),a.toBlob(function(t){n.thumbnailUrl&&URL.revokeObjectURL(n.thumbnailUrl),n.thumbnailUrl=URL.createObjectURL(t),n.emit("update",n.thumbnailUrl,(e+1)/r)})}).catch(function(t){console.error(t)})}});return this.processing=!0,(c=l,c.reduce(function(t,e){return t.then(e)},Promise.resolve())).then(function(){return p(2*u).then(function(){n.processing=!1,n.emit("done")}).catch(function(t){n.processing=!1,n.emit("error",t.message),console.error(t)})}).catch(function(t){n.processing=!1,n.emit("error",t.message),console.error(t)})}},{key:"creatScreenshotDate",value:function(){for(var t=this.option,e=t.number,n=t.width,o=t.height,i=t.column,r=this.video.duration/e,u=[r];u.length<e;){var a=u[u.length-1];u.push(a+r)}return u.map(function(t,e){return{time:t-r/2,x:e%i*n,y:Math.floor(e/i)*o}})}},{key:"creatCanvas",value:function(){var t=this.option,e=t.number,n=t.width,o=t.height,i=t.column,r=document.createElement("canvas"),u=r.getContext("2d");return r.width=n*i,r.height=Math.ceil(e/i)*o+30,u.fillStyle="black",u.fillRect(0,0,r.width,r.height),u.font="14px Georgia",u.fillStyle="#fff",u.fillText("From: https://artplayer.org/thumbnail, Number: ".concat(e,", Width: ").concat(n,", Height: ").concat(o,", Column: ").concat(i),10,r.height-11),r}},{key:"download",value:function(){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...");var t,e,n=document.createElement("a"),o="".concat((t=this.file.name,(e=t.split(".")).pop(),e.join(".")),".png");return n.download=o,n.href=this.thumbnailUrl,document.body.appendChild(n),n.click(),document.body.removeChild(n),this.emit("download",o),this}},{key:"errorHandle",value:function(t,e){if(!t)throw this.emit("error",e),new Error(e)}},{key:"destroy",value:function(){this.option.fileInput.removeEventListener("change",this.inputChange),document.body.removeChild(this.video),this.videoUrl&&URL.revokeObjectURL(this.videoUrl),this.thumbnailUrl&&URL.revokeObjectURL(this.thumbnailUrl),this.emit("destroy")}}],[{key:"creatVideo",value:function(){var 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}},{key:"DEFAULTS",get:function(){return{delay:300,number:60,width:160,height:90,column:10}}}]),n}();window.ArtplayerToolThumbnail=m,t.default=m,Object.defineProperty(t,"__esModule",{value:!0})});