picturefill.js

/*! Picturefill - v2.0.0 - 2014-05-08
* http://scottjehl.github.io/picturefill
* Copyright (c) 2014 https://github.com/scottjehl/picturefill/blob/master/Authors.txt; Licensed MIT */
window.matchMedia||(window.matchMedia=function(){"use strict";var a=window.styleMedia||window.media;if(!a){var b=document.createElement("style"),c=document.getElementsByTagName("script")[0],d=null;b.type="text/css",b.id="matchmediajs-test",c.parentNode.insertBefore(b,c),d="getComputedStyle"in window&&window.getComputedStyle(b,null)||b.currentStyle,a={matchMedium:function(a){var c="@media "+a+"{ #matchmediajs-test { width: 1px; } }";return b.styleSheet?b.styleSheet.cssText=c:b.textContent=c,"1px"===d.width}}}return function(b){return{matches:a.matchMedium(b||"all"),media:b||"all"}}}()),function(a,b){"use strict";function c(a){var b,c,d,f,g,h;a=a||{},b=a.elements||e.getAllElements();for(var i=0,j=b.length;j>i;i++)if(c=b[i],d=c.nodeName.toUpperCase(),f=void 0,g=void 0,h=void 0,c[e.ns]||(c[e.ns]={}),a.reevaluate||!c[e.ns].evaluated){if("PICTURE"===d){if(e.removeVideoShim(c),f=e.getMatch(c),f===!1)continue;h=c.getElementsByTagName("img")[0]}else f=void 0,h=c;h&&(h[e.ns]||(h[e.ns]={}),h.srcset&&("PICTURE"===d||h.getAttribute("sizes"))&&e.dodgeSrcset(h),f?(g=e.processSourceSet(f),e.applyBestCandidate(g,h)):(g=e.processSourceSet(h),(void 0===h.srcset||h.getAttribute("sizes")&&h[e.ns].srcset)&&e.applyBestCandidate(g,h)),c[e.ns].evaluated=!0)}}function d(){c();var d=setInterval(function(){return a.picturefill(),/^loaded|^i|^c/.test(b.readyState)?void clearInterval(d):void 0},250);if(a.addEventListener){var e;a.addEventListener("resize",function(){a.clearTimeout(e),e=a.setTimeout(function(){c({reevaluate:!0})},60)},!1)}}if(!a.HTMLPictureElement){b.createElement("picture");var e={};e.ns="picturefill",e.srcsetSupported=void 0!==(new a.Image).srcset,e.trim=function(a){return a.trim?a.trim():a.replace(/^\s+|\s+$/g,"")},e.endsWith=function(a,b){return a.endsWith?a.endsWith(b):-1!==a.indexOf(b,a.length-b.length)},e.matchesMedia=function(b){return a.matchMedia&&a.matchMedia(b).matches},e.getDpr=function(){return a.devicePixelRatio||1},e.getWidthFromLength=function(a){return a=a&&parseFloat(a)>0?a:"100vw",a=a.replace("vw","%"),e.lengthEl||(e.lengthEl=b.createElement("div"),b.documentElement.insertBefore(e.lengthEl,b.documentElement.firstChild)),e.lengthEl.style.cssText="position: absolute; left: 0; width: "+a+";",e.lengthEl.offsetWidth},e.types={},e.types["image/jpeg"]=!0,e.types["image/gif"]=!0,e.types["image/png"]=!0,e.types["image/svg+xml"]=b.implementation.hasFeature("http://www.w3.org/TR/SVG11/feature#Image","1.1"),e.types["image/webp"]=function(){var b=new a.Image,d="image/webp";b.onerror=function(){e.types[d]=!1,c()},b.onload=function(){e.types[d]=1===b.width,c()},b.src="data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAAAAAAfQ//73v/+BiOh/AAA="},e.verifyTypeSupport=function(a){var b=a.getAttribute("type");return null===b||""===b?!0:"function"==typeof e.types[b]?(e.types[b](),"pending"):e.types[b]},e.parseSize=function(a){var b=/(\([^)]+\))?\s*(.+)/g.exec(a);return{media:b&&b[1],length:b&&b[2]}},e.findWidthFromSourceSize=function(a){for(var b,c=e.trim(a).split(/\s*,\s*/),d=0,f=c.length;f>d;d++){var g=c[d],h=e.parseSize(g),i=h.length,j=h.media;if(i&&(!j||e.matchesMedia(j))){b=i;break}}return e.getWidthFromLength(b)},e.getCandidatesFromSourceSet=function(a,b){for(var c=e.trim(a).split(/,\s+/),d=b?e.findWidthFromSourceSize(b):"100%",f=[],g=0,h=c.length;h>g;g++){var i,j=c[g],k=j.split(/\s+/),l=k[1];!l||"w"!==l.slice(-1)&&"x"!==l.slice(-1)||(l=l.slice(0,-1)),i=b?parseFloat(parseInt(l,10)/d):l?parseFloat(l,10):1;var m={url:k[0],resolution:i};f.push(m)}return f},e.dodgeSrcset=function(a){a.srcset&&(a[e.ns].srcset=a.srcset,a.removeAttribute("srcset"))},e.processSourceSet=function(a){var b=a.getAttribute("srcset"),c=a.getAttribute("sizes"),d=[];return"IMG"===a.nodeName.toUpperCase()&&a[e.ns]&&a[e.ns].srcset&&(b=a[e.ns].srcset),b&&(d=e.getCandidatesFromSourceSet(b,c)),d},e.applyBestCandidate=function(a,b){var c,d,f;a.sort(e.ascendingSort),d=a.length,f=a[d-1];for(var g=0;d>g;g++)if(c=a[g],c.resolution>=e.getDpr()){f=c;break}e.endsWith(b.src,f.url)||(b.src=f.url,b.currentSrc=b.src)},e.ascendingSort=function(a,b){return a.resolution-b.resolution},e.removeVideoShim=function(a){var b=a.getElementsByTagName("video");if(b.length){for(var c=b[0],d=c.getElementsByTagName("source");d.length;)a.insertBefore(d[0],c);c.parentNode.removeChild(c)}},e.getAllElements=function(){for(var a=b.getElementsByTagName("picture"),c=[],d=b.getElementsByTagName("img"),f=0,g=a.length+d.length;g>f;f++)if(f<a.length)c[f]=a[f];else{var h=d[f-a.length];"PICTURE"!==h.parentNode.nodeName.toUpperCase()&&(e.srcsetSupported&&h.getAttribute("sizes")||null!==h.getAttribute("srcset"))&&c.push(h)}return c},e.getMatch=function(a){for(var b,c=a.childNodes,d=0,f=c.length;f>d;d++){var g=c[d];if(1===g.nodeType){if("IMG"===g.nodeName.toUpperCase())return b;if("SOURCE"===g.nodeName.toUpperCase()){var h=g.getAttribute("media");if(g.getAttribute("srcset")&&(!h||e.matchesMedia(h))){var i=e.verifyTypeSupport(g);if(i===!0){b=g;break}if("pending"===i)return!1}}}}return b},d(),c._=e,"object"==typeof module&&"object"==typeof module.exports?module.exports=c:"object"==typeof define&&define.amd?define(function(){return c}):"object"==typeof a&&(a.picturefill=c)}}(this,this.document);