text: /*
   * D:/Development/XNAT/1.6/xnat_builder_1_6dev/plugin-resources/webapp/xnat/scripts/yui/build/get/get.js
   * XNAT http://www.xnat.org
   * Copyright (c) 2014, Washington University School of Medicine
   * All Rights Reserved
   *
   * Released under the Simplified BSD.
   *
   * Last modified 7/1/13 9:12 AM
   */
  
  
  
  /**
   * Fetches and inserts one or more script or link nodes into the document 
   * @namespace YAHOO.util
   * @class YAHOO.util.Get
   */
  YAHOO.util.Get = function() {
  
      /**
       * hash of queues to manage multiple requests
       * @property queues
       * @private
       */
      var queues={}, 
          
      /**
       * queue index used to generate transaction ids
       * @property qidx
       * @type int
       * @private
       */
          qidx=0, 
          
      /**
       * node index used to generate unique node ids
       * @property nidx
       * @type int
       * @private
       */
          nidx=0, 
  
          // ridx=0,
  
          // sandboxFrame=null,
  
      /**
       * interal property used to prevent multiple simultaneous purge 
       * processes
       * @property purging
       * @type boolean
       * @private
       */
          purging=false,
  
          ua=YAHOO.env.ua, 
          
          lang=YAHOO.lang;
      
      /** 
       * Generates an HTML element, this is not appended to a document
       * @method _node
       * @param type {string} the type of element
       * @param attr {string} the attributes
       * @param win {Window} optional window to create the element in
       * @return {HTMLElement} the generated node
       * @private
       */
      var _node = function(type, attr, win) {
          var w = win || window, d=w.document, n=d.createElement(type);
  
          for (var i in attr) {
              if (attr[i] && YAHOO.lang.hasOwnProperty(attr, i)) {
                  n.setAttribute(i, attr[i]);
              }
          }
  
          return n;
      };
  
      /**
       * Generates a link node
       * @method _linkNode
       * @param url {string} the url for the css file
       * @param win {Window} optional window to create the node in
       * @return {HTMLElement} the generated node
       * @private
       */
      var _linkNode = function(url, win, attributes) {
  
          var o = {
              id:   "yui__dyn_" + (nidx++),
              type: "text/css",
              rel:  "stylesheet",
              href: url
          };
  
          if (attributes) {
              lang.augmentObject(o, attributes);
          }
  
          return _node("link", o, win);
      };
  
      /**
       * Generates a script node
       * @method _scriptNode
       * @param url {string} the url for the script file
       * @param win {Window} optional window to create the node in
       * @return {HTMLElement} the generated node
       * @private
       */
      var _scriptNode = function(url, win, attributes) {
          var o = {
              id:   "yui__dyn_" + (nidx++),
              type: "text/javascript",
              src:  url
          };
  
          if (attributes) {
              lang.augmentObject(o, attributes);
          }
  
          return _node("script", o, win);
      };
  
      /**
       * Returns the data payload for callback functions
       * @method _returnData
       * @private
       */
      var _returnData = function(q, msg) {
          return {
                  tId: q.tId,
                  win: q.win,
                  data: q.data,
                  nodes: q.nodes,
                  msg: msg,
                  purge: function() {
                      _purge(this.tId);
                  }
              };
      };
  
      var _get = function(nId, tId) {
          var q = queues[tId],
              n = (lang.isString(nId)) ? q.win.document.getElementById(nId) : nId;
          if (!n) {
              _fail(tId, "target node not found: " + nId);
          }
  
          return n;
      };
  
      /*
       * The request failed, execute fail handler with whatever
       * was accomplished.  There isn't a failure case at the
       * moment unless you count aborted transactions
       * @method _fail
       * @param id {string} the id of the request
       * @private
       */
      var _fail = function(id, msg) {
          var q = queues[id];
          // execute failure callback
          if (q.onFailure) {
              var sc=q.scope || q.win;
              q.onFailure.call(sc, _returnData(q, msg));
          }
      };
  
      /**
       * The request is complete, so executing the requester's callback
       * @method _finish
       * @param id {string} the id of the request
       * @private
       */
      var _finish = function(id) {
          var q = queues[id];
          q.finished = true;
  
          if (q.aborted) {
              var msg = "transaction " + id + " was aborted";
              _fail(id, msg);
              return;
          }
  
          // execute success callback
          if (q.onSuccess) {
              var sc=q.scope || q.win;
              q.onSuccess.call(sc, _returnData(q));
          }
      };
  
      /**
       * Timeout detected
       * @method _timeout
       * @param id {string} the id of the request
       * @private
       */
      var _timeout = function(id) {
          var q = queues[id];
          if (q.onTimeout) {
              var sc=q.scope || q;
              q.onTimeout.call(sc, _returnData(q));
          }
      };
  
      /**
       * Loads the next item for a given request
       * @method _next
       * @param id {string} the id of the request
       * @param loaded {string} the url that was just loaded, if any
       * @private
       */
      var _next = function(id, loaded) {
          var q = queues[id];
  
          if (q.timer) {
              // Y.log('cancel timer');
              q.timer.cancel();
          }
  
          if (q.aborted) {
              var msg = "transaction " + id + " was aborted";
              _fail(id, msg);
              return;
          }
  
          if (loaded) {
              q.url.shift(); 
              if (q.varName) {
                  q.varName.shift(); 
              }
          } else {
              // This is the first pass: make sure the url is an array
              q.url = (lang.isString(q.url)) ? [q.url] : q.url;
              if (q.varName) {
                  q.varName = (lang.isString(q.varName)) ? [q.varName] : q.varName;
              }
          }
  
          var w=q.win, d=w.document, h=d.getElementsByTagName("head")[0], n;
  
          if (q.url.length === 0) {
              // Safari 2.x workaround - There is no way to know when 
              // a script is ready in versions of Safari prior to 3.x.
              // Adding an extra node reduces the problem, but doesn't
              // eliminate it completely because the browser executes
              // them asynchronously. 
              if (q.type === "script" && ua.webkit && ua.webkit < 420 && 
                      !q.finalpass && !q.varName) {
                  // Add another script node.  This does not guarantee that the
                  // scripts will execute in order, but it does appear to fix the
                  // problem on fast connections more effectively than using an
                  // arbitrary timeout.  It is possible that the browser does
                  // block subsequent script execution in this case for a limited
                  // time.
                  var extra = _scriptNode(null, q.win, q.attributes);
                  extra.innerHTML='YAHOO.util.Get._finalize("' + id + '");';
                  q.nodes.push(extra); h.appendChild(extra);
  
              } else {
                  _finish(id);
              }
  
              return;
          } 
  
  
          var url = q.url[0];
  
          // if the url is undefined, this is probably a trailing comma problem in IE
          if (!url) {
              q.url.shift(); 
              return _next(id);
          }
  
  
          if (q.timeout) {
              // Y.log('create timer');
              q.timer = lang.later(q.timeout, q, _timeout, id);
          }
  
          if (q.type === "script") {
              n = _scriptNode(url, w, q.attributes);
          } else {
              n = _linkNode(url, w, q.attributes);
          }
  
          // track this node's load progress
          _track(q.type, n, id, url, w, q.url.length);
  
          // add the node to the queue so we can return it to the user supplied callback
          q.nodes.push(n);
  
          // add it to the head or insert it before 'insertBefore'
          if (q.insertBefore) {
              var s = _get(q.insertBefore, id);
              if (s) {
                  s.parentNode.insertBefore(n, s);
              }
          } else {
              h.appendChild(n);
          }
          
  
          // FireFox does not support the onload event for link nodes, so there is
          // no way to make the css requests synchronous. This means that the css 
          // rules in multiple files could be applied out of order in this browser
          // if a later request returns before an earlier one.  Safari too.
          if ((ua.webkit || ua.gecko) && q.type === "css") {
              _next(id, url);
          }
      };
  
      /**
       * Removes processed queues and corresponding nodes
       * @method _autoPurge
       * @private
       */
      var _autoPurge = function() {
  
          if (purging) {
              return;
          }
  
          purging = true;
          for (var i in queues) {
              var q = queues[i];
              if (q.autopurge && q.finished) {
                  _purge(q.tId);
                  delete queues[i];
              }
          }
  
          purging = false;
      };
  
      /**
       * Removes the nodes for the specified queue
       * @method _purge
       * @private
       */
      var _purge = function(tId) {
          if (queues[tId]) {
  
              var q     = queues[tId],
                  nodes = q.nodes, 
                  l     = nodes.length, 
                  d     = q.win.document, 
                  h     = d.getElementsByTagName("head")[0],
                  sib, i, node, attr;
  
              if (q.insertBefore) {
                  sib = _get(q.insertBefore, tId);
                  if (sib) {
                      h = sib.parentNode;
                  }
              }
  
              for (i=0; i<l; i=i+1) {
                  node = nodes[i];
                  if (node.clearAttributes) {
                      node.clearAttributes();
                  } else {
                      for (attr in node) {
                          delete node[attr];
                      }
                  }
  
                  h.removeChild(node);
              }
  
              q.nodes = [];
          }
      };
  
      /**
       * Saves the state for the request and begins loading
       * the requested urls
       * @method queue
       * @param type {string} the type of node to insert
       * @param url {string} the url to load
       * @param opts the hash of options for this request
       * @private
       */
      var _queue = function(type, url, opts) {
  
          var id = "q" + (qidx++);
          opts = opts || {};
  
          if (qidx % YAHOO.util.Get.PURGE_THRESH === 0) {
              _autoPurge();
          }
  
          queues[id] = lang.merge(opts, {
              tId: id,
              type: type,
              url: url,
              finished: false,
              aborted: false,
              nodes: []
          });
  
          var q = queues[id];
          q.win = q.win || window;
          q.scope = q.scope || q.win;
          q.autopurge = ("autopurge" in q) ? q.autopurge : 
                        (type === "script") ? true : false;
  
          if (opts.charset) {
              q.attributes = q.attributes || {};
              q.attributes.charset = opts.charset;
          }
  
          lang.later(0, q, _next, id);
  
          return {
              tId: id
          };
      };
  
      /**
       * Detects when a node has been loaded.  In the case of
       * script nodes, this does not guarantee that contained
       * script is ready to use.
       * @method _track
       * @param type {string} the type of node to track
       * @param n {HTMLElement} the node to track
       * @param id {string} the id of the request
       * @param url {string} the url that is being loaded
       * @param win {Window} the targeted window
       * @param qlength the number of remaining items in the queue,
       * including this one
       * @param trackfn {Function} function to execute when finished
       * the default is _next
       * @private
       */
      var _track = function(type, n, id, url, win, qlength, trackfn) {
          var f = trackfn || _next;
  
          // IE supports the readystatechange event for script and css nodes
          if (ua.ie) {
              n.onreadystatechange = function() {
                  var rs = this.readyState;
                  if ("loaded" === rs || "complete" === rs) {
                      n.onreadystatechange = null;
                      f(id, url);
                  }
              };
  
          // webkit prior to 3.x is problemmatic
          } else if (ua.webkit) {
  
              if (type === "script") {
  
                  // Safari 3.x supports the load event for script nodes (DOM2)
                  if (ua.webkit >= 420) {
  
                      n.addEventListener("load", function() {
                          f(id, url);
                      });
  
                  // Nothing can be done with Safari < 3.x except to pause and hope
                  // for the best, particularly after last script is inserted. The
                  // scripts will always execute in the order they arrive, not
                  // necessarily the order in which they were inserted.  To support
                  // script nodes with complete reliability in these browsers, script
                  // nodes either need to invoke a function in the window once they
                  // are loaded or the implementer needs to provide a well-known
                  // property that the utility can poll for.
                  } else {
                      // Poll for the existence of the named variable, if it
                      // was supplied.
                      var q = queues[id];
                      if (q.varName) {
                          var freq=YAHOO.util.Get.POLL_FREQ;
                          q.maxattempts = YAHOO.util.Get.TIMEOUT/freq;
                          q.attempts = 0;
                          q._cache = q.varName[0].split(".");
                          q.timer = lang.later(freq, q, function(o) {
                              var a=this._cache, l=a.length, w=this.win, i;
                              for (i=0; i<l; i=i+1) {
                                  w = w[a[i]];
                                  if (!w) {
                                      // if we have exausted our attempts, give up
                                      this.attempts++;
                                      if (this.attempts++ > this.maxattempts) {
                                          var msg = "Over retry limit, giving up";
                                          q.timer.cancel();
                                          _fail(id, msg);
                                      } else {
                                      }
                                      return;
                                  }
                              }
                              
  
                              q.timer.cancel();
                              f(id, url);
  
                          }, null, true);
                      } else {
                          lang.later(YAHOO.util.Get.POLL_FREQ, null, f, [id, url]);
                      }
                  }
              } 
  
          // FireFox and Opera support onload (but not DOM2 in FF) handlers for
          // script nodes.  Opera, but not FF, supports the onload event for link
          // nodes.
          } else { 
              n.onload = function() {
                  f(id, url);
              };
          }
      };
  
      return {
  
          /**
           * The default poll freqency in ms, when needed
           * @property POLL_FREQ
           * @static
           * @type int
           * @default 10
           */
          POLL_FREQ: 10,
  
          /**
           * The number of request required before an automatic purge.
           * property PURGE_THRESH
           * @static
           * @type int
           * @default 20
           */
          PURGE_THRESH: 20,
  
          /**
           * The length time to poll for varName when loading a script in
           * Safari 2.x before the transaction fails.
           * property TIMEOUT
           * @static
           * @type int
           * @default 2000
           */
          TIMEOUT: 2000,
          
          /**
           * Called by the the helper for detecting script load in Safari
           * @method _finalize
           * @param id {string} the transaction id
           * @private
           */
          _finalize: function(id) {
              lang.later(0, null, _finish, id);
          },
  
          /**
           * Abort a transaction
           * @method abort
           * @param {string|object} either the tId or the object returned from
           * script() or css()
           */
          abort: function(o) {
              var id = (lang.isString(o)) ? o : o.tId;
              var q = queues[id];
              if (q) {
                  q.aborted = true;
              }
          }, 
  
          /**
           * Fetches and inserts one or more script nodes into the head
           * of the current document or the document in a specified window.
           *
           * @method script
           * @static
           * @param url {string|string[]} the url or urls to the script(s)
           * @param opts {object} Options: 
           * <dl>
           * <dt>onSuccess</dt>
           * <dd>
           * callback to execute when the script(s) are finished loading
           * The callback receives an object back with the following
           * data:
           * <dl>
           * <dt>win</dt>
           * <dd>the window the script(s) were inserted into</dd>
           * <dt>data</dt>
           * <dd>the data object passed in when the request was made</dd>
           * <dt>nodes</dt>
           * <dd>An array containing references to the nodes that were
           * inserted</dd>
           * <dt>purge</dt>
           * <dd>A function that, when executed, will remove the nodes
           * that were inserted</dd>
           * <dt>
           * </dl>
           * </dd>
           * <dt>onFailure</dt>
           * <dd>
           * callback to execute when the script load operation fails
           * The callback receives an object back with the following
           * data:
           * <dl>
           * <dt>win</dt>
           * <dd>the window the script(s) were inserted into</dd>
           * <dt>data</dt>
           * <dd>the data object passed in when the request was made</dd>
           * <dt>nodes</dt>
           * <dd>An array containing references to the nodes that were
           * inserted successfully</dd>
           * <dt>purge</dt>
           * <dd>A function that, when executed, will remove any nodes
           * that were inserted</dd>
           * <dt>
           * </dl>
           * </dd>
           * <dt>onTimeout</dt>
           * <dd>
           * callback to execute when a timeout occurs.
           * The callback receives an object back with the following
           * data:
           * <dl>
           * <dt>win</dt>
           * <dd>the window the script(s) were inserted into</dd>
           * <dt>data</dt>
           * <dd>the data object passed in when the request was made</dd>
           * <dt>nodes</dt>
           * <dd>An array containing references to the nodes that were
           * inserted</dd>
           * <dt>purge</dt>
           * <dd>A function that, when executed, will remove the nodes
           * that were inserted</dd>
           * <dt>
           * </dl>
           * </dd>
           * <dt>scope</dt>
           * <dd>the execution context for the callbacks</dd>
           * <dt>win</dt>
           * <dd>a window other than the one the utility occupies</dd>
           * <dt>autopurge</dt>
           * <dd>
           * setting to true will let the utilities cleanup routine purge 
           * the script once loaded
           * </dd>
           * <dt>data</dt>
           * <dd>
           * data that is supplied to the callback when the script(s) are
           * loaded.
           * </dd>
           * <dt>varName</dt>
           * <dd>
           * variable that should be available when a script is finished
           * loading.  Used to help Safari 2.x and below with script load 
           * detection.  The type of this property should match what was
           * passed into the url parameter: if loading a single url, a
           * string can be supplied.  If loading multiple scripts, you
           * must supply an array that contains the variable name for
           * each script.
           * </dd>
           * <dt>insertBefore</dt>
           * <dd>node or node id that will become the new node's nextSibling</dd>
           * </dl>
           * <dt>charset</dt>
           * <dd>Node charset, deprecated, use 'attributes'</dd>
           * <dt>attributes</dt>
           * <dd>A hash of attributes to apply to dynamic nodes.</dd>
           * <dt>timeout</dt>
           * <dd>Number of milliseconds to wait before aborting and firing the timeout event</dd>
           * <pre>
           * // assumes yahoo, dom, and event are already on the page
           * &nbsp;&nbsp;YAHOO.util.Get.script(
           * &nbsp;&nbsp;["http://yui.yahooapis.com/2.7.0/build/dragdrop/dragdrop-min.js",
           * &nbsp;&nbsp;&nbsp;"http://yui.yahooapis.com/2.7.0/build/animation/animation-min.js"], &#123;
           * &nbsp;&nbsp;&nbsp;&nbsp;onSuccess: function(o) &#123;
           * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;new YAHOO.util.DDProxy("dd1"); // also new o.reference("dd1"); would work
           * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.log("won't cause error because YAHOO is the scope");
           * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;this.log(o.nodes.length === 2) // true
           * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// o.purge(); // optionally remove the script nodes immediately
           * &nbsp;&nbsp;&nbsp;&nbsp;&#125;,
           * &nbsp;&nbsp;&nbsp;&nbsp;onFailure: function(o) &#123;
           * &nbsp;&nbsp;&nbsp;&nbsp;&#125;,
           * &nbsp;&nbsp;&nbsp;&nbsp;data: "foo",
           * &nbsp;&nbsp;&nbsp;&nbsp;timeout: 10000, // 10 second timeout
           * &nbsp;&nbsp;&nbsp;&nbsp;scope: YAHOO,
           * &nbsp;&nbsp;&nbsp;&nbsp;// win: otherframe // target another window/frame
           * &nbsp;&nbsp;&nbsp;&nbsp;autopurge: true // allow the utility to choose when to remove the nodes
           * &nbsp;&nbsp;&#125;);
           * </pre>
           * @return {tId: string} an object containing info about the transaction
           */
          script: function(url, opts) { return _queue("script", url, opts); },
  
          /**
           * Fetches and inserts one or more css link nodes into the 
           * head of the current document or the document in a specified
           * window.
           * @method css
           * @static
           * @param url {string} the url or urls to the css file(s)
           * @param opts Options: 
           * <dl>
           * <dt>onSuccess</dt>
           * <dd>
           * callback to execute when the css file(s) are finished loading
           * The callback receives an object back with the following
           * data:
           * <dl>win</dl>
           * <dd>the window the link nodes(s) were inserted into</dd>
           * <dt>data</dt>
           * <dd>the data object passed in when the request was made</dd>
           * <dt>nodes</dt>
           * <dd>An array containing references to the nodes that were
           * inserted</dd>
           * <dt>purge</dt>
           * <dd>A function that, when executed, will remove the nodes
           * that were inserted</dd>
           * <dt>
           * </dl>
           * </dd>
           * <dt>scope</dt>
           * <dd>the execution context for the callbacks</dd>
           * <dt>win</dt>
           * <dd>a window other than the one the utility occupies</dd>
           * <dt>data</dt>
           * <dd>
           * data that is supplied to the callbacks when the nodes(s) are
           * loaded.
           * </dd>
           * <dt>insertBefore</dt>
           * <dd>node or node id that will become the new node's nextSibling</dd>
           * <dt>charset</dt>
           * <dd>Node charset, deprecated, use 'attributes'</dd>
           * <dt>attributes</dt>
           * <dd>A hash of attributes to apply to dynamic nodes.</dd>
           * </dl>
           * <pre>
           *      YAHOO.util.Get.css("http://yui.yahooapis.com/2.7.0/build/menu/assets/skins/sam/menu.css");
           * </pre>
           * <pre>
           *      YAHOO.util.Get.css(["http://yui.yahooapis.com/2.7.0/build/menu/assets/skins/sam/menu.css",
           * </pre>
           * @return {tId: string} an object containing info about the transaction
           */
          css: function(url, opts) {
              return _queue("css", url, opts); 
          }
      };
  }();
  
  YAHOO.register("get", YAHOO.util.Get, {version: "2.8.0r4", build: "2449"});
  