SGH / COMPONENTS

  /**
   * @license
   * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
   * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
   * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
   * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
   * Code distributed by Google as part of the polymer project is also
   * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
   */

  // @version 0.7.15

  if (typeof WeakMap === "undefined") {
    (function() {
      var defineProperty = Object.defineProperty;
      var counter = Date.now() % 1e9;
      var WeakMap = function() {
        this.name = "__st" + (Math.random() * 1e9 >>> 0) + (counter++ + "__");
      };
      WeakMap.prototype = {
        set: function(key, value) {
          var entry = key[this.name];
          if (entry && entry[0] === key) entry[1] = value; else defineProperty(key, this.name, {
            value: [ key, value ],
            writable: true
          });
          return this;
        },
        get: function(key) {
          var entry;
          return (entry = key[this.name]) && entry[0] === key ? entry[1] : undefined;
        },
        "delete": function(key) {
          var entry = key[this.name];
          if (!entry || entry[0] !== key) return false;
          entry[0] = entry[1] = undefined;
          return true;
        },
        has: function(key) {
          var entry = key[this.name];
          if (!entry) return false;
          return entry[0] === key;
        }
      };
      window.WeakMap = WeakMap;
    })();
  }
  
  (function(global) {

    if (global.JsMutationObserver) {
      return;
    }

    var registrationsTable = new WeakMap();
    var setImmediate;
    if (/Trident|Edge/.test(navigator.userAgent)) {
      setImmediate = setTimeout;
    } else if (window.setImmediate) {
      setImmediate = window.setImmediate;
    } else {
      var setImmediateQueue = [];
      var sentinel = String(Math.random());
      window.addEventListener("message", function(e) {
        if (e.data === sentinel) {
          var queue = setImmediateQueue;
          setImmediateQueue = [];
          queue.forEach(function(func) {
            func();
          });
        }
      });
      setImmediate = function(func) {
        setImmediateQueue.push(func);
        window.postMessage(sentinel, "*");
      };
    }
    var isScheduled = false;
    var scheduledObservers = [];
    function scheduleCallback(observer) {
      scheduledObservers.push(observer);
      if (!isScheduled) {
        isScheduled = true;
        setImmediate(dispatchCallbacks);
      }
    }
    function wrapIfNeeded(node) {
      return window.ShadowDOMPolyfill && window.ShadowDOMPolyfill.wrapIfNeeded(node) || node;
    }
    function dispatchCallbacks() {
      isScheduled = false;
      var observers = scheduledObservers;
      scheduledObservers = [];
      observers.sort(function(o1, o2) {
        return o1.uid_ - o2.uid_;
      });
      var anyNonEmpty = false;
      observers.forEach(function(observer) {
        var queue = observer.takeRecords();
        removeTransientObserversFor(observer);
        if (queue.length) {
          observer.callback_(queue, observer);
          anyNonEmpty = true;
        }
      });
      if (anyNonEmpty) dispatchCallbacks();
    }
    function removeTransientObserversFor(observer) {
      observer.nodes_.forEach(function(node) {
        var registrations = registrationsTable.get(node);
        if (!registrations) return;
        registrations.forEach(function(registration) {
          if (registration.observer === observer) registration.removeTransientObservers();
        });
      });
    }
    function forEachAncestorAndObserverEnqueueRecord(target, callback) {
      for (var node = target; node; node = node.parentNode) {
        var registrations = registrationsTable.get(node);
        if (registrations) {
          for (var j = 0; j < registrations.length; j++) {
            var registration = registrations[j];
            var options = registration.options;
            if (node !== target && !options.subtree) continue;
            var record = callback(options);
            if (record) registration.enqueue(record);
          }
        }
      }
    }
    var uidCounter = 0;
    function JsMutationObserver(callback) {
      this.callback_ = callback;
      this.nodes_ = [];
      this.records_ = [];
      this.uid_ = ++uidCounter;
    }
    JsMutationObserver.prototype = {
      observe: function(target, options) {
        target = wrapIfNeeded(target);
        if (!options.childList && !options.attributes && !options.characterData || options.attributeOldValue && !options.attributes || options.attributeFilter && options.attributeFilter.length && !options.attributes || options.characterDataOldValue && !options.characterData) {
          throw new SyntaxError();
        }
        var registrations = registrationsTable.get(target);
        if (!registrations) registrationsTable.set(target, registrations = []);
        var registration;
        for (var i = 0; i < registrations.length; i++) {
          if (registrations[i].observer === this) {
            registration = registrations[i];
            registration.removeListeners();
            registration.options = options;
            break;
          }
        }
        if (!registration) {
          registration = new Registration(this, target, options);
          registrations.push(registration);
          this.nodes_.push(target);
        }
        registration.addListeners();
      },
      disconnect: function() {
        this.nodes_.forEach(function(node) {
          var registrations = registrationsTable.get(node);
          for (var i = 0; i < registrations.length; i++) {
            var registration = registrations[i];
            if (registration.observer === this) {
              registration.removeListeners();
              registrations.splice(i, 1);
              break;
            }
          }
        }, this);
        this.records_ = [];
      },
      takeRecords: function() {
        var copyOfRecords = this.records_;
        this.records_ = [];
        return copyOfRecords;
      }
    };
    function MutationRecord(type, target) {
      this.type = type;
      this.target = target;
      this.addedNodes = [];
      this.removedNodes = [];
      this.previousSibling = null;
      this.nextSibling = null;
      this.attributeName = null;
      this.attributeNamespace = null;
      this.oldValue = null;
    }
    function copyMutationRecord(original) {
      var record = new MutationRecord(original.type, original.target);
      record.addedNodes = original.addedNodes.slice();
      record.removedNodes = original.removedNodes.slice();
      record.previousSibling = original.previousSibling;
      record.nextSibling = original.nextSibling;
      record.attributeName = original.attributeName;
      record.attributeNamespace = original.attributeNamespace;
      record.oldValue = original.oldValue;
      return record;
    }
    var currentRecord, recordWithOldValue;
    function getRecord(type, target) {
      return currentRecord = new MutationRecord(type, target);
    }
    function getRecordWithOldValue(oldValue) {
      if (recordWithOldValue) return recordWithOldValue;
      recordWithOldValue = copyMutationRecord(currentRecord);
      recordWithOldValue.oldValue = oldValue;
      return recordWithOldValue;
    }
    function clearRecords() {
      currentRecord = recordWithOldValue = undefined;
    }
    function recordRepresentsCurrentMutation(record) {
      return record === recordWithOldValue || record === currentRecord;
    }
    function selectRecord(lastRecord, newRecord) {
      if (lastRecord === newRecord) return lastRecord;
      if (recordWithOldValue && recordRepresentsCurrentMutation(lastRecord)) return recordWithOldValue;
      return null;
    }
    function Registration(observer, target, options) {
      this.observer = observer;
      this.target = target;
      this.options = options;
      this.transientObservedNodes = [];
    }
    Registration.prototype = {
      enqueue: function(record) {
        var records = this.observer.records_;
        var length = records.length;
        if (records.length > 0) {
          var lastRecord = records[length - 1];
          var recordToReplaceLast = selectRecord(lastRecord, record);
          if (recordToReplaceLast) {
            records[length - 1] = recordToReplaceLast;
            return;
          }
        } else {
          scheduleCallback(this.observer);
        }
        records[length] = record;
      },
      addListeners: function() {
        this.addListeners_(this.target);
      },
      addListeners_: function(node) {
        var options = this.options;
        if (options.attributes) node.addEventListener("DOMAttrModified", this, true);
        if (options.characterData) node.addEventListener("DOMCharacterDataModified", this, true);
        if (options.childList) node.addEventListener("DOMNodeInserted", this, true);
        if (options.childList || options.subtree) node.addEventListener("DOMNodeRemoved", this, true);
      },
      removeListeners: function() {
        this.removeListeners_(this.target);
      },
      removeListeners_: function(node) {
        var options = this.options;
        if (options.attributes) node.removeEventListener("DOMAttrModified", this, true);
        if (options.characterData) node.removeEventListener("DOMCharacterDataModified", this, true);
        if (options.childList) node.removeEventListener("DOMNodeInserted", this, true);
        if (options.childList || options.subtree) node.removeEventListener("DOMNodeRemoved", this, true);
      },
      addTransientObserver: function(node) {
        if (node === this.target) return;
        this.addListeners_(node);
        this.transientObservedNodes.push(node);
        var registrations = registrationsTable.get(node);
        if (!registrations) registrationsTable.set(node, registrations = []);
        registrations.push(this);
      },
      removeTransientObservers: function() {
        var transientObservedNodes = this.transientObservedNodes;
        this.transientObservedNodes = [];
        transientObservedNodes.forEach(function(node) {
          this.removeListeners_(node);
          var registrations = registrationsTable.get(node);
          for (var i = 0; i < registrations.length; i++) {
            if (registrations[i] === this) {
              registrations.splice(i, 1);
              break;
            }
          }
        }, this);
      },
      handleEvent: function(e) {
        e.stopImmediatePropagation();
        switch (e.type) {
         case "DOMAttrModified":
          var name = e.attrName;
          var namespace = e.relatedNode.namespaceURI;
          var target = e.target;
          var record = new getRecord("attributes", target);
          record.attributeName = name;
          record.attributeNamespace = namespace;
          var oldValue = e.attrChange === MutationEvent.ADDITION ? null : e.prevValue;
          forEachAncestorAndObserverEnqueueRecord(target, function(options) {
            if (!options.attributes) return;
            if (options.attributeFilter && options.attributeFilter.length && options.attributeFilter.indexOf(name) === -1 && options.attributeFilter.indexOf(namespace) === -1) {
              return;
            }
            if (options.attributeOldValue) return getRecordWithOldValue(oldValue);
            return record;
          });
          break;
  
         case "DOMCharacterDataModified":
          var target = e.target;
          var record = getRecord("characterData", target);
          var oldValue = e.prevValue;
          forEachAncestorAndObserverEnqueueRecord(target, function(options) {
            if (!options.characterData) return;
            if (options.characterDataOldValue) return getRecordWithOldValue(oldValue);
            return record;
          });
          break;
  
         case "DOMNodeRemoved":
          this.addTransientObserver(e.target);
  
         case "DOMNodeInserted":
          var changedNode = e.target;
          var addedNodes, removedNodes;
          if (e.type === "DOMNodeInserted") {
            addedNodes = [ changedNode ];
            removedNodes = [];
          } else {
            addedNodes = [];
            removedNodes = [ changedNode ];
          }
          var previousSibling = changedNode.previousSibling;
          var nextSibling = changedNode.nextSibling;
          var record = getRecord("childList", e.target.parentNode);
          record.addedNodes = addedNodes;
          record.removedNodes = removedNodes;
          record.previousSibling = previousSibling;
          record.nextSibling = nextSibling;
          forEachAncestorAndObserverEnqueueRecord(e.relatedNode, function(options) {
            if (!options.childList) return;
            return record;
          });
        }
        clearRecords();
      }
    };
    global.JsMutationObserver = JsMutationObserver;

    if (!global.MutationObserver) {
      global.MutationObserver = JsMutationObserver;
      JsMutationObserver._isPolyfilled = true;
    }

  })(self);

  window.HTMLImports = window.HTMLImports || {
    flags: {}
  };
  
  (function(scope) {
    var IMPORT_LINK_TYPE = "import";
    var useNative = Boolean(IMPORT_LINK_TYPE in document.createElement("link"));
    var hasShadowDOMPolyfill = Boolean(window.ShadowDOMPolyfill);
    var wrap = function(node) {
      return hasShadowDOMPolyfill ? window.ShadowDOMPolyfill.wrapIfNeeded(node) : node;
    };
    var rootDocument = wrap(document);
    var currentScriptDescriptor = {
      get: function() {
        var script = window.HTMLImports.currentScript || document.currentScript || (document.readyState !== "complete" ? document.scripts[document.scripts.length - 1] : null);
        return wrap(script);
      },
      configurable: true
    };
    Object.defineProperty(document, "_currentScript", currentScriptDescriptor);
    Object.defineProperty(rootDocument, "_currentScript", currentScriptDescriptor);
    var isIE = /Trident/.test(navigator.userAgent);
    function whenReady(callback, doc) {
      doc = doc || rootDocument;
      whenDocumentReady(function() {
        watchImportsLoad(callback, doc);
      }, doc);
    }
    var requiredReadyState = isIE ? "complete" : "interactive";
    var READY_EVENT = "readystatechange";
    function isDocumentReady(doc) {
      return doc.readyState === "complete" || doc.readyState === requiredReadyState;
    }
    function whenDocumentReady(callback, doc) {
      if (!isDocumentReady(doc)) {
        var checkReady = function() {
          if (doc.readyState === "complete" || doc.readyState === requiredReadyState) {
            doc.removeEventListener(READY_EVENT, checkReady);
            whenDocumentReady(callback, doc);
          }
        };
        doc.addEventListener(READY_EVENT, checkReady);
      } else if (callback) {
        callback();
      }
    }
    function markTargetLoaded(event) {
      event.target.__loaded = true;
    }
    function watchImportsLoad(callback, doc) {
      var imports = doc.querySelectorAll("link[rel=import]");
      var parsedCount = 0, importCount = imports.length, newImports = [], errorImports = [];
      function checkDone() {
        if (parsedCount == importCount && callback) {
          callback({
            allImports: imports,
            loadedImports: newImports,
            errorImports: errorImports
          });
        }
      }
      function loadedImport(e) {
        markTargetLoaded(e);
        newImports.push(this);
        parsedCount++;
        checkDone();
      }
      function errorLoadingImport(e) {
        errorImports.push(this);
        parsedCount++;
        checkDone();
      }
      if (importCount) {
        for (var i = 0, imp; i < importCount && (imp = imports[i]); i++) {
          if (isImportLoaded(imp)) {

            parsedCount++;
            checkDone();
          } else {
            imp.addEventListener("load", loadedImport);
            imp.addEventListener("error", errorLoadingImport);
          }
        }
      } else {
        checkDone();
      }
    }
    function isImportLoaded(link) {
      return useNative ? link.__loaded || link.import && link.import.readyState !== "loading" : link.__importParsed;
    }
    if (useNative) {
      new MutationObserver(function(mxns) {
        for (var i = 0, l = mxns.length, m; i < l && (m = mxns[i]); i++) {
          if (m.addedNodes) {
            handleImports(m.addedNodes);
          }
        }
      }).observe(document.head, {
        childList: true
      });
      function handleImports(nodes) {
        for (var i = 0, l = nodes.length, n; i < l && (n = nodes[i]); i++) {
          if (isImport(n)) {
            handleImport(n);
          }
        }
      }
      function isImport(element) {
        return element.localName === "link" && element.rel === "import";
      }
      function handleImport(element) {
        var loaded = element.import;
        if (loaded) {
          markTargetLoaded({
            target: element
          });
        } else {
          element.addEventListener("load", markTargetLoaded);
          element.addEventListener("error", markTargetLoaded);
        }
      }
      (function() {
        if (document.readyState === "loading") {
          var imports = document.querySelectorAll("link[rel=import]");
          for (var i = 0, l = imports.length, imp; i < l && (imp = imports[i]); i++) {
            handleImport(imp);
          }
        }
      })();
    }
    whenReady(function(detail) {
      window.HTMLImports.ready = true;
      window.HTMLImports.readyTime = new Date().getTime();
      var evt = rootDocument.createEvent("CustomEvent");
      evt.initCustomEvent("HTMLImportsLoaded", true, true, detail);
      rootDocument.dispatchEvent(evt);
    });
    scope.IMPORT_LINK_TYPE = IMPORT_LINK_TYPE;
    scope.useNative = useNative;
    scope.rootDocument = rootDocument;
    scope.whenReady = whenReady;
    scope.isIE = isIE;
  })(window.HTMLImports);
  
  (function(scope) {
    var modules = [];
    var addModule = function(module) {
      modules.push(module);
    };
    var initializeModules = function() {
      modules.forEach(function(module) {
        module(scope);
      });
    };
    scope.addModule = addModule;
    scope.initializeModules = initializeModules;
  })(window.HTMLImports);
  
  window.HTMLImports.addModule(function(scope) {
    var CSS_URL_REGEXP = /(url\()([^)]*)(\))/g;
    var CSS_IMPORT_REGEXP = /(@import[\s]+(?!url\())([^;]*)(;)/g;
    var path = {
      resolveUrlsInStyle: function(style, linkUrl) {
        var doc = style.ownerDocument;
        var resolver = doc.createElement("a");
        style.textContent = this.resolveUrlsInCssText(style.textContent, linkUrl, resolver);
        return style;
      },
      resolveUrlsInCssText: function(cssText, linkUrl, urlObj) {
        var r = this.replaceUrls(cssText, urlObj, linkUrl, CSS_URL_REGEXP);
        r = this.replaceUrls(r, urlObj, linkUrl, CSS_IMPORT_REGEXP);
        return r;
      },
      replaceUrls: function(text, urlObj, linkUrl, regexp) {
        return text.replace(regexp, function(m, pre, url, post) {
          var urlPath = url.replace(/["']/g, "");
          if (linkUrl) {
            urlPath = new URL(urlPath, linkUrl).href;
          }
          urlObj.href = urlPath;
          urlPath = urlObj.href;
          return pre + "'" + urlPath + "'" + post;
        });
      }
    };
    scope.path = path;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var xhr = {
      async: true,
      ok: function(request) {
        return request.status >= 200 && request.status < 300 || request.status === 304 || request.status === 0;
      },
      load: function(url, next, nextContext) {
        var request = new XMLHttpRequest();
        if (scope.flags.debug || scope.flags.bust) {
          url += "?" + Math.random();
        }
        request.open("GET", url, xhr.async);
        request.addEventListener("readystatechange", function(e) {
          if (request.readyState === 4) {

            var locationHeader = request.getResponseHeader("Location");

            var redirectedUrl = null;

            if (locationHeader) {
              var redirectedUrl = locationHeader.substr(0, 1) === "/" ? location.origin + locationHeader : locationHeader;

            }
            next.call(nextContext, !xhr.ok(request) && request, request.response || request.responseText, redirectedUrl);
          }
        });
        request.send();
        return request;
      },
      loadDocument: function(url, next, nextContext) {
        this.load(url, next, nextContext).responseType = "document";
      }
    };
    scope.xhr = xhr;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var xhr = scope.xhr;
    var flags = scope.flags;
    var Loader = function(onLoad, onComplete) {
      this.cache = {};
      this.onload = onLoad;
      this.oncomplete = onComplete;
      this.inflight = 0;
      this.pending = {};
    };
    Loader.prototype = {
      addNodes: function(nodes) {
        this.inflight += nodes.length;
        for (var i = 0, l = nodes.length, n; i < l && (n = nodes[i]); i++) {
          this.require(n);
        }
        this.checkDone();
      },
      addNode: function(node) {
        this.inflight++;
        this.require(node);
        this.checkDone();
      },
      require: function(elt) {
        var url = elt.src || elt.href;
        elt.__nodeUrl = url;
        if (!this.dedupe(url, elt)) {
          this.fetch(url, elt);
        }
      },
      dedupe: function(url, elt) {
        if (this.pending[url]) {
          this.pending[url].push(elt);
          return true;
        }
        var resource;
        if (this.cache[url]) {
          this.onload(url, elt, this.cache[url]);
          this.tail();
          return true;
        }
        this.pending[url] = [ elt ];
        return false;
      },
      fetch: function(url, elt) {
        flags.load && console.log("fetch", url, elt);
        if (!url) {
          setTimeout(function() {
            this.receive(url, elt, {
              error: "href must be specified"
            }, null);
          }.bind(this), 0);
        } else if (url.match(/^data:/)) {
          var pieces = url.split(",");
          var header = pieces[0];
          var body = pieces[1];
          if (header.indexOf(";base64") > -1) {
            body = atob(body);
          } else {
            body = decodeURIComponent(body);
          }
          setTimeout(function() {
            this.receive(url, elt, null, body);
          }.bind(this), 0);
        } else {
          var receiveXhr = function(err, resource, redirectedUrl) {
            this.receive(url, elt, err, resource, redirectedUrl);
          }.bind(this);
          xhr.load(url, receiveXhr);
        }
      },
      receive: function(url, elt, err, resource, redirectedUrl) {
        this.cache[url] = resource;
        var $p = this.pending[url];
        for (var i = 0, l = $p.length, p; i < l && (p = $p[i]); i++) {
          this.onload(url, p, resource, err, redirectedUrl);
          this.tail();
        }
        this.pending[url] = null;
      },
      tail: function() {
        --this.inflight;
        this.checkDone();
      },
      checkDone: function() {
        if (!this.inflight) {
          this.oncomplete();
        }
      }
    };
    scope.Loader = Loader;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var Observer = function(addCallback) {
      this.addCallback = addCallback;
      this.mo = new MutationObserver(this.handler.bind(this));
    };
    Observer.prototype = {
      handler: function(mutations) {
        for (var i = 0, l = mutations.length, m; i < l && (m = mutations[i]); i++) {
          if (m.type === "childList" && m.addedNodes.length) {
            this.addedNodes(m.addedNodes);
          }
        }
      },
      addedNodes: function(nodes) {
        if (this.addCallback) {
          this.addCallback(nodes);
        }
        for (var i = 0, l = nodes.length, n, loading; i < l && (n = nodes[i]); i++) {
          if (n.children && n.children.length) {
            this.addedNodes(n.children);
          }
        }
      },
      observe: function(root) {
        this.mo.observe(root, {
          childList: true,
          subtree: true
        });
      }
    };
    scope.Observer = Observer;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var path = scope.path;
    var rootDocument = scope.rootDocument;
    var flags = scope.flags;
    var isIE = scope.isIE;
    var IMPORT_LINK_TYPE = scope.IMPORT_LINK_TYPE;
    var IMPORT_SELECTOR = "link[rel=" + IMPORT_LINK_TYPE + "]";
    var importParser = {
      documentSelectors: IMPORT_SELECTOR,

      importsSelectors: [ IMPORT_SELECTOR, "link[rel=stylesheet]:not([type])", "style:not([type])", "script:not([type])", 'script[type="application/javascript"]', 'script[type="text/javascript"]' ].join(","),

      map: {
        link: "parseLink",
        script: "parseScript",
        style: "parseStyle"
      },
      dynamicElements: [],
      parseNext: function() {
        var next = this.nextToParse();
        if (next) {
          this.parse(next);
        }
      },
      parse: function(elt) {
        if (this.isParsed(elt)) {
          flags.parse && console.log("[%s] is already parsed", elt.localName);
          return;
        }
        var fn = this[this.map[elt.localName]];
        if (fn) {
          this.markParsing(elt);
          fn.call(this, elt);
        }
      },
      parseDynamic: function(elt, quiet) {
        this.dynamicElements.push(elt);
        if (!quiet) {
          this.parseNext();
        }
      },
      markParsing: function(elt) {
        flags.parse && console.log("parsing", elt);
        this.parsingElement = elt;
      },
      markParsingComplete: function(elt) {
        elt.__importParsed = true;
        this.markDynamicParsingComplete(elt);
        if (elt.__importElement) {
          elt.__importElement.__importParsed = true;
          this.markDynamicParsingComplete(elt.__importElement);
        }
        this.parsingElement = null;
        flags.parse && console.log("completed", elt);
      },
      markDynamicParsingComplete: function(elt) {
        var i = this.dynamicElements.indexOf(elt);
        if (i >= 0) {
          this.dynamicElements.splice(i, 1);
        }
      },
      parseImport: function(elt) {

        elt.import = elt.__doc;

        if (window.HTMLImports.__importsParsingHook) {
          window.HTMLImports.__importsParsingHook(elt);
        }
        if (elt.import) {
          elt.import.__importParsed = true;
        }
        this.markParsingComplete(elt);
        if (elt.__resource && !elt.__error) {
          elt.dispatchEvent(new CustomEvent("load", {
            bubbles: false
          }));
        } else {
          elt.dispatchEvent(new CustomEvent("error", {
            bubbles: false
          }));
        }
        if (elt.__pending) {
          var fn;
          while (elt.__pending.length) {
            fn = elt.__pending.shift();
            if (fn) {
              fn({
                target: elt
              });
            }
          }
        }
        this.parseNext();
      },
      parseLink: function(linkElt) {
        if (nodeIsImport(linkElt)) {
          this.parseImport(linkElt);
        } else {
          linkElt.href = linkElt.href;
          this.parseGeneric(linkElt);
        }
      },
      parseStyle: function(elt) {
        var src = elt;
        elt = cloneStyle(elt);
        src.__appliedElement = elt;
        elt.__importElement = src;
        this.parseGeneric(elt);
      },
      parseGeneric: function(elt) {
        this.trackElement(elt);
        this.addElementToDocument(elt);
      },
      rootImportForElement: function(elt) {
        var n = elt;
        while (n.ownerDocument.__importLink) {
          n = n.ownerDocument.__importLink;
        }
        return n;
      },
      addElementToDocument: function(elt) {
        var port = this.rootImportForElement(elt.__importElement || elt);
        port.parentNode.insertBefore(elt, port);
      },
      trackElement: function(elt, callback) {
        var self = this;
        var done = function(e) {

          elt.removeEventListener("load", done);
          elt.removeEventListener("error", done);

          if (callback) {
            callback(e);
          }
          self.markParsingComplete(elt);
          self.parseNext();
        };
        elt.addEventListener("load", done);
        elt.addEventListener("error", done);
        if (isIE && elt.localName === "style") {
          var fakeLoad = false;
          if (elt.textContent.indexOf("@import") == -1) {
            fakeLoad = true;
          } else if (elt.sheet) {
            fakeLoad = true;
            var csr = elt.sheet.cssRules;
            var len = csr ? csr.length : 0;
            for (var i = 0, r; i < len && (r = csr[i]); i++) {
              if (r.type === CSSRule.IMPORT_RULE) {
                fakeLoad = fakeLoad && Boolean(r.styleSheet);
              }
            }
          }
          if (fakeLoad) {
            setTimeout(function() {
              elt.dispatchEvent(new CustomEvent("load", {
                bubbles: false
              }));
            });
          }
        }
      },
      parseScript: function(scriptElt) {
        var script = document.createElement("script");
        script.__importElement = scriptElt;
        script.src = scriptElt.src ? scriptElt.src : generateScriptDataUrl(scriptElt);
        scope.currentScript = scriptElt;
        this.trackElement(script, function(e) {
          if (script.parentNode) {
            script.parentNode.removeChild(script);
          }
          scope.currentScript = null;
        });
        this.addElementToDocument(script);
      },
      nextToParse: function() {
        this._mayParse = [];
        return !this.parsingElement && (this.nextToParseInDoc(rootDocument) || this.nextToParseDynamic());
      },
      nextToParseInDoc: function(doc, link) {
        if (doc && this._mayParse.indexOf(doc) < 0) {
          this._mayParse.push(doc);
          var nodes = doc.querySelectorAll(this.parseSelectorsForNode(doc));
          for (var i = 0, l = nodes.length, p = 0, n; i < l && (n = nodes[i]); i++) {
            if (!this.isParsed(n)) {
              if (this.hasResource(n)) {

                return nodeIsImport(n) ? this.nextToParseInDoc(n.__doc, n) : n;

              } else {
                return;
              }
            }
          }
        }
        return link;
      },
      nextToParseDynamic: function() {
        return this.dynamicElements[0];
      },
      parseSelectorsForNode: function(node) {
        var doc = node.ownerDocument || node;
        return doc === rootDocument ? this.documentSelectors : this.importsSelectors;
      },
      isParsed: function(node) {
        return node.__importParsed;
      },
      needsDynamicParsing: function(elt) {
        return this.dynamicElements.indexOf(elt) >= 0;
      },
      hasResource: function(node) {

        if (nodeIsImport(node) && node.__doc === undefined) {

          return false;
        }
        return true;
      }
    };
    function nodeIsImport(elt) {
      return elt.localName === "link" && elt.rel === IMPORT_LINK_TYPE;
    }
    function generateScriptDataUrl(script) {
      var scriptContent = generateScriptContent(script);
      return "data:text/javascript;charset=utf-8," + encodeURIComponent(scriptContent);
    }
    function generateScriptContent(script) {
      return script.textContent + generateSourceMapHint(script);
    }
    function generateSourceMapHint(script) {
      var owner = script.ownerDocument;
      owner.__importedScripts = owner.__importedScripts || 0;
      var moniker = script.ownerDocument.baseURI;
      var num = owner.__importedScripts ? "-" + owner.__importedScripts : "";
      owner.__importedScripts++;
      return "\n//# sourceURL=" + moniker + num + ".js\n";
    }
    function cloneStyle(style) {
      var clone = style.ownerDocument.createElement("style");
      clone.textContent = style.textContent;
      path.resolveUrlsInStyle(clone);
      return clone;
    }
    scope.parser = importParser;
    scope.IMPORT_SELECTOR = IMPORT_SELECTOR;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var flags = scope.flags;
    var IMPORT_LINK_TYPE = scope.IMPORT_LINK_TYPE;
    var IMPORT_SELECTOR = scope.IMPORT_SELECTOR;
    var rootDocument = scope.rootDocument;
    var Loader = scope.Loader;
    var Observer = scope.Observer;
    var parser = scope.parser;
    var importer = {
      documents: {},
      documentPreloadSelectors: IMPORT_SELECTOR,
      importsPreloadSelectors: [ IMPORT_SELECTOR ].join(","),
      loadNode: function(node) {
        importLoader.addNode(node);
      },
      loadSubtree: function(parent) {
        var nodes = this.marshalNodes(parent);
        importLoader.addNodes(nodes);
      },
      marshalNodes: function(parent) {
        return parent.querySelectorAll(this.loadSelectorsForNode(parent));
      },
      loadSelectorsForNode: function(node) {
        var doc = node.ownerDocument || node;
        return doc === rootDocument ? this.documentPreloadSelectors : this.importsPreloadSelectors;
      },
      loaded: function(url, elt, resource, err, redirectedUrl) {
        flags.load && console.log("loaded", url, elt);
        elt.__resource = resource;
        elt.__error = err;
        if (isImportLink(elt)) {
          var doc = this.documents[url];
          if (doc === undefined) {
            doc = err ? null : makeDocument(resource, redirectedUrl || url);
            if (doc) {
              doc.__importLink = elt;
              this.bootDocument(doc);
            }
            this.documents[url] = doc;
          }

          elt.__doc = doc;

        }
        parser.parseNext();
      },
      bootDocument: function(doc) {
        this.loadSubtree(doc);
        this.observer.observe(doc);
        parser.parseNext();
      },
      loadedAll: function() {
        parser.parseNext();
      }
    };
    var importLoader = new Loader(importer.loaded.bind(importer), importer.loadedAll.bind(importer));
    importer.observer = new Observer();
    function isImportLink(elt) {
      return isLinkRel(elt, IMPORT_LINK_TYPE);
    }
    function isLinkRel(elt, rel) {
      return elt.localName === "link" && elt.getAttribute("rel") === rel;
    }
    function hasBaseURIAccessor(doc) {
      return !!Object.getOwnPropertyDescriptor(doc, "baseURI");
    }
    function makeDocument(resource, url) {
      var doc = document.implementation.createHTMLDocument(IMPORT_LINK_TYPE);
      doc._URL = url;
      var base = doc.createElement("base");
      base.setAttribute("href", url);
      if (!doc.baseURI && !hasBaseURIAccessor(doc)) {
        Object.defineProperty(doc, "baseURI", {
          value: url
        });
      }
      var meta = doc.createElement("meta");
      meta.setAttribute("charset", "utf-8");
      doc.head.appendChild(meta);
      doc.head.appendChild(base);
      doc.body.innerHTML = resource;
      if (window.HTMLTemplateElement && HTMLTemplateElement.bootstrap) {
        HTMLTemplateElement.bootstrap(doc);
      }
      return doc;
    }
    if (!document.baseURI) {
      var baseURIDescriptor = {
        get: function() {
          var base = document.querySelector("base");
          return base ? base.href : window.location.href;
        },
        configurable: true
      };
      Object.defineProperty(document, "baseURI", baseURIDescriptor);
      Object.defineProperty(rootDocument, "baseURI", baseURIDescriptor);
    }
    scope.importer = importer;
    scope.importLoader = importLoader;
  });
  
  window.HTMLImports.addModule(function(scope) {
    var parser = scope.parser;
    var importer = scope.importer;
    var dynamic = {
      added: function(nodes) {
        var owner, parsed, loading;
        for (var i = 0, l = nodes.length, n; i < l && (n = nodes[i]); i++) {
          if (!owner) {
            owner = n.ownerDocument;
            parsed = parser.isParsed(owner);
          }
          loading = this.shouldLoadNode(n);
          if (loading) {
            importer.loadNode(n);
          }
          if (this.shouldParseNode(n) && parsed) {
            parser.parseDynamic(n, loading);
          }
        }
      },
      shouldLoadNode: function(node) {
        return node.nodeType === 1 && matches.call(node, importer.loadSelectorsForNode(node));
      },
      shouldParseNode: function(node) {
        return node.nodeType === 1 && matches.call(node, parser.parseSelectorsForNode(node));
      }
    };
    importer.observer.addCallback = dynamic.added.bind(dynamic);
    var matches = HTMLElement.prototype.matches || HTMLElement.prototype.matchesSelector || HTMLElement.prototype.webkitMatchesSelector || HTMLElement.prototype.mozMatchesSelector || HTMLElement.prototype.msMatchesSelector;
  });
  
  (function(scope) {
    var initializeModules = scope.initializeModules;
    var isIE = scope.isIE;
    if (scope.useNative) {
      return;
    }