;;;(function(window){'use strict';var proto=Object.create(HTMLElement.prototype);proto.createdCallback=function(){var style=document.createElement('style');style.innerHTML=`music-view-stack {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  -moz-user-select: none;
}
music-view-stack > iframe {
  border: none;
  visibility: hidden;
  pointer-events: none;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  will-change: transform;
}
music-view-stack > iframe.active,
music-view-stack > iframe.fade,
music-view-stack > iframe.pop,
music-view-stack > iframe.push {
  animation-duration: 0.2s;
  animation-timing-function: linear;
  visibility: visible;
}
music-view-stack > iframe.active {
  pointer-events: auto;
}
music-view-stack > iframe.fade {
  animation-duration: 0s;
}
music-view-stack > iframe.fade.in {
  animation-name: fade-in;
}
music-view-stack > iframe.fade.out {
  animation-name: fade-out;
}
music-view-stack > iframe.pop.in {
  animation-name: pop-in;
}
music-view-stack > iframe.pop.out {
  animation-name: pop-out;
}
music-view-stack > iframe.push.in {
  animation-name: push-in;
}
music-view-stack > iframe.push.out {
  animation-name: push-out;
}
[dir="rtl"] music-view-stack > iframe.pop.in {
  animation-name: push-in;
}
[dir="rtl"] music-view-stack > iframe.pop.out {
  animation-name: push-out;
}
[dir="rtl"] music-view-stack > iframe.push.in {
  animation-name: pop-in;
}
[dir="rtl"] music-view-stack > iframe.push.out {
  animation-name: pop-out;
}
@keyframes fade-in {
  0%   { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes fade-out {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}
@keyframes pop-in {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(0); }
}
@keyframes pop-out {
  0%   { transform: translateX(0); }
  100% { transform: translateX(100%); }
}
@keyframes push-in {
  0%   { transform: translateX(100%); }
  100% { transform: translateX(0); }
}
@keyframes push-out {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-100%); }
}`;if(this.firstChild){this.insertBefore(style,this.firstChild);}else{this.appendChild(style);}
this.cachedViews={};[].forEach.call(this.querySelectorAll('iframe'),(frame)=>{var location=new URL(frame.src);var view={url:location.pathname+location.search,frame:frame,title:frame.contentDocument.title};this.initializeView(view).then((view)=>{if(this.activeView===view){this.dispatchEvent(new CustomEvent('titlechange',{detail:view.title}));}});this.cachedViews[view.url]=view;});this.addEventListener('animationend',(evt)=>{var classList=evt.target.classList;if(classList.contains('destroy')){this.destroyView(evt.target.src);}
classList.remove('fade','pop','push','in','out');});this.views=[];this.activeView=null;};proto.loadView=function(url){var view=this.cachedViews[url];if(view){return Promise.resolve(view);}
var frame=document.createElement('iframe');this.appendChild(frame);frame.src=url;view={url:url,frame:frame,title:''};return this.initializeView(view);};proto.initializeView=function(view){view.frame.addEventListener('rendered',()=>{this.dispatchEvent(new CustomEvent('rendered'));});view.frame.addEventListener('titlechange',(evt)=>{view.title=evt.detail;if(this.activeView===view){this.dispatchEvent(new CustomEvent('titlechange',{detail:evt.detail}));}});const onL10nReady=()=>{view.title=view.frame.contentDocument.title;this.cachedViews[view.url]=view;this.dispatchEvent(new CustomEvent('loaded'));return view;};return loaded(view.frame).then(()=>view.frame.contentDocument.l10n.ready).then(onL10nReady);};proto.destroyView=function(url){for(var key in this.cachedViews){var view=this.cachedViews[key];if(key===url||view.frame.src===url){view.frame.contentWindow.dispatchEvent(new CustomEvent('viewdestroy'));delete this.cachedViews[key];setTimeout(()=>this.removeChild(view.frame),5000);return;}}};proto.setRootView=function(url){return this.loadView(url).then((view)=>{var oldActiveView=this.activeView;if(oldActiveView){oldActiveView.frame.classList.add('fade','out');oldActiveView.frame.classList.remove('active');oldActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewhidden'));}
this.views=[view];this.activeView=view;var newActiveView=this.activeView;newActiveView.frame.classList.add('fade','in');newActiveView.frame.classList.add('active');newActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewvisible'));this.dispatchEvent(new CustomEvent('change',{detail:newActiveView}));});};proto.pushView=function(url){if(!this.activeView){return this.setRootView(url);}
return this.loadView(url).then((view)=>{requestAnimationFrame(()=>{var oldActiveView=this.activeView;oldActiveView.frame.classList.add('push','out');oldActiveView.frame.classList.remove('active');oldActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewhidden'));this.views.push(view);this.activeView=view;var newActiveView=this.activeView;newActiveView.frame.classList.add('push','in','active');newActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewvisible'));this.dispatchEvent(new CustomEvent('change',{detail:newActiveView}));});});};proto.popView=function(destroy){if(this.views.length<2){return Promise.reject();}
var oldActiveView=this.activeView;this.views.pop();this.activeView=this.views[this.views.length-1];var newActiveView=this.activeView;return new Promise((resolve)=>{requestAnimationFrame(()=>{oldActiveView.frame.classList.add('pop','out');oldActiveView.frame.classList.remove('active');oldActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewhidden'));if(destroy){oldActiveView.frame.classList.add('destroy');}
newActiveView.frame.classList.add('pop','in','active');newActiveView.frame.contentWindow.dispatchEvent(new CustomEvent('viewvisible'));this.dispatchEvent(new CustomEvent('change',{detail:newActiveView}));resolve();});});};try{window.MusicViewStack=document.registerElement('music-view-stack',{prototype:proto});}catch(e){if(e.name!=='NotSupportedError'){throw e;}}
function loaded(frame){return new Promise((resolve)=>{frame.addEventListener('load',function onLoad(){frame.removeEventListener('load',onLoad);resolve();});});}})(window);