/*!
  ** Unobtrusive Ajax support library for jQuery
  ** Copyright (C) Microsoft Corporation. All rights reserved.
  */
  
  /*jslint white: true, browser: true, onevar: true, undef: true, nomen: true, eqeqeq: true, plusplus: true, bitwise: true, regexp: true, newcap: true, immed: true, strict: false */
  /*global window: false, jQuery: false */
  
  (function ($$) {
      var data_click = "unobtrusiveAjaxClick",
          data_validation = "unobtrusiveValidation";
  
      function getFunction(code, argNames) {
          var fn = window, parts = (code || "").split(".");
          while (fn && parts.length) {
              fn = fn[parts.shift()];
          }
          if (typeof (fn) === "function") {
              return fn;
          }
          argNames.push(code);
          return Function.constructor.apply(null, argNames);
      }
  
      function isMethodProxySafe(method) {
          return method === "GET" || method === "POST";
      }
  
      function asyncOnBeforeSend(xhr, method) {
          if (!isMethodProxySafe(method)) {
              xhr.setRequestHeader("X-HTTP-Method-Override", method);
          }
      }
  
      function asyncOnSuccess(element, data, contentType) {
          var mode;
  
          if (contentType.indexOf("application/x-javascript") !== -1) {  // jQuery already executes JavaScript for us
              return;
          }
  
          mode = (element.getAttribute("data-ajax-mode") || "").toUpperCase();
          $(element.getAttribute("data-ajax-update")).each(function (i, update) {
              var top;
  
              switch (mode) {
              case "BEFORE":
                  top = update.firstChild;
                  $("<div />").html(data).contents().each(function () {
                      update.insertBefore(this, top);
                  });
                  break;
              case "AFTER":
                  $("<div />").html(data).contents().each(function () {
                      update.appendChild(this);
                  });
                  break;
              default:
                  update.html(data);
                  break;
              }
          });
      }
  
      function asyncRequest(element, options) {
          var confirm, loading, method, duration;
  
          confirm = element.getAttribute("data-ajax-confirm");
          if (confirm && !window.confirm(confirm)) {
              return;
          }
  
          loading = $(element.getAttribute("data-ajax-loading"));
          duration = element.getAttribute("data-ajax-loading-duration") || 0;
  
          .extend(options, {
              type: element.getAttribute("data-ajax-method") || undefined,
              url: element.getAttribute("data-ajax-url") || undefined,
              beforeSend: function (xhr) {
                  var result;
                  asyncOnBeforeSend(xhr, method);
                  result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);
                  if (result !== false) {
                      loading.show(duration);
                  }
                  return result;
              },
              complete: function () {
                  loading.hide(duration);
                  getFunction(element.getAttribute("data-ajax-complete"), ["xhr", "status"]).apply(this, arguments);
              },
              success: function (data, status, xhr) {
                  asyncOnSuccess(element, data, xhr.getResponseHeader("Content-Type") || "text/html");
                  getFunction(element.getAttribute("data-ajax-success"), ["data", "status", "xhr"]).apply(this, arguments);
              },
              error: getFunction(element.getAttribute("data-ajax-failure"), ["xhr", "status", "error"])
          });
  
          options.data.push({ name: "X-Requested-With", value: "XMLHttpRequest" });
  
          method = options.type.toUpperCase();
          if (!isMethodProxySafe(method)) {
              options.type = "POST";
              options.data.push({ name: "X-HTTP-Method-Override", value: method });
          }
  
          $$.ajax(options);
      }
  
      function validate(form) {
          var validationInfo = form.data(data_validation);
          return !validationInfo || !validationInfo.validate || validationInfo.validate();
      }
  
      $("a[data-ajax=true]").live("click", function (evt) {
          evt.preventDefault();
          asyncRequest(this, {
              url: this.href,
              type: "GET",
              data: []
          });
      });
  
      $("form[data-ajax=true] input[type=image]").live("click", function (evt) {
          var name = evt.target.name,
              target = $(evt.target),
              form = $$target.parents("form")[0],
              offset = target.offset();
  
          form.data(data_click, [
              { name: name + ".x", value: Math.round(evt.pageX - offset.left) },
              { name: name + ".y", value: Math.round(evt.pageY - offset.top) }
          ]);
  
          setTimeout(function () {
              form.removeData(data_click);
          }, 0);
      });
  
      $("form[data-ajax=true] :submit").live("click", function (evt) {
          var name = evt.target.name,
              form = $(evt.target).parents("form")[0];
  
          form.data(data_click, name ? [{ name: name, value: evt.target.value }] : []);
  
          setTimeout(function () {
              form.removeData(data_click);
          }, 0);
      });
  
      $("form[data-ajax=true]").live("submit", function (evt) {
          var clickInfo = this.data(data_click) || [];
          evt.preventDefault();
          if (!validate(this)) {
              return;
          }
          asyncRequest(this, {
              url: this.action,
              type: this.method || "GET",
              data: clickInfo.concat(this.serializeArray())
          });
      });
  }(jQuery));