zammad/app/assets/javascripts/knowledge_base_public_polyfills/svgstore.js

(function(){
	/*! svg4everybody v2.1.9 | github.com/jonathantneal/svg4everybody */
  function embed(parent, svg, target) {
      // if the target exists
      if (target) {
          // create a document fragment to hold the contents of the target
          var fragment = document.createDocumentFragment(), viewBox = !svg.hasAttribute("viewBox") && target.getAttribute("viewBox");
          // conditionally set the viewBox on the svg
          viewBox && svg.setAttribute("viewBox", viewBox);
          // copy the contents of the clone into the fragment
          for (// clone the target
          var clone = target.cloneNode(!0); clone.childNodes.length; ) {
              fragment.appendChild(clone.firstChild);
          }
          // append the fragment into the svg
          parent.appendChild(fragment);
      }
  }
  function loadreadystatechange(xhr) {
      // listen to changes in the request
      xhr.onreadystatechange = function() {
          // if the request is ready
          if (4 === xhr.readyState) {
              // get the cached html document
              var cachedDocument = xhr._cachedDocument;
              // ensure the cached html document based on the xhr response
              cachedDocument || (cachedDocument = xhr._cachedDocument = document.implementation.createHTMLDocument(""), 
              cachedDocument.body.innerHTML = xhr.responseText, xhr._cachedTarget = {}), // clear the xhr embeds list and embed each item
              xhr._embeds.splice(0).map(function(item) {
                  // get the cached target
                  var target = xhr._cachedTarget[item.id];
                  // ensure the cached target
                  target || (target = xhr._cachedTarget[item.id] = cachedDocument.getElementById(item.id)), 
                  // embed the target into the svg
                  embed(item.parent, item.svg, target);
              });
          }
      }, // test the ready state change immediately
      xhr.onreadystatechange();
  }
  function svg4everybody(rawopts) {
      function oninterval() {
          // while the index exists in the live <use> collection
          for (// get the cached <use> index
          var index = 0; index < uses.length; ) {
              // get the current <use>
              var use = uses[index], parent = use.parentNode, svg = getSVGAncestor(parent), src = use.getAttribute("xlink:href") || use.getAttribute("href");
              if (!src && opts.attributeName && (src = use.getAttribute(opts.attributeName)), 
              svg && src) {
                  if (polyfill) {
                      if (!opts.validate || opts.validate(src, svg, use)) {
                          // remove the <use> element
                          parent.removeChild(use);
                          // parse the src and get the url and id
                          var srcSplit = src.split("#"), url = srcSplit.shift(), id = srcSplit.join("#");
                          // if the link is external
                          if (url.length) {
                              // get the cached xhr request
                              var xhr = requests[url];
                              // ensure the xhr request exists
                              xhr || (xhr = requests[url] = new XMLHttpRequest(), xhr.open("GET", url), xhr.send(), 
                              xhr._embeds = []), // add the svg and id as an item to the xhr embeds list
                              xhr._embeds.push({
                                  parent: parent,
                                  svg: svg,
                                  id: id
                              }), // prepare the xhr ready state change event
                              loadreadystatechange(xhr);
                          } else {
                              // embed the local id into the svg
                              embed(parent, svg, document.getElementById(id));
                          }
                      } else {
                          // increase the index when the previous value was not "valid"
                          ++index, ++numberOfSvgUseElementsToBypass;
                      }
                  }
              } else {
                  // increase the index when the previous value was not "valid"
                  ++index;
              }
          }
          // continue the interval
          (!uses.length || uses.length - numberOfSvgUseElementsToBypass > 0) && requestAnimationFrame(oninterval, 67);
      }
      var polyfill, opts = Object(rawopts), newerIEUA = /\bTrident\/[567]\b|\bMSIE (?:9|10)\.0\b/, webkitUA = /\bAppleWebKit\/(\d+)\b/, olderEdgeUA = /\bEdge\/12\.(\d+)\b/, edgeUA = /\bEdge\/.(\d+)\b/, inIframe = window.top !== window.self;
      polyfill = "polyfill" in opts ? opts.polyfill : newerIEUA.test(navigator.userAgent) || (navigator.userAgent.match(olderEdgeUA) || [])[1] < 10547 || (navigator.userAgent.match(webkitUA) || [])[1] < 537 || edgeUA.test(navigator.userAgent) && inIframe;
      // create xhr requests object
      var requests = {}, requestAnimationFrame = window.requestAnimationFrame || setTimeout, uses = document.getElementsByTagName("use"), numberOfSvgUseElementsToBypass = 0;
      // conditionally start the interval if the polyfill is active
      polyfill && oninterval();
  }
  function getSVGAncestor(node) {
      for (var svg = node; "svg" !== svg.nodeName.toLowerCase() && (svg = svg.parentNode); ) {}
      return svg;
  }

	svg4everybody();
}());