//ajax支持庫/*!** 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 *//*data-ajax=true //開啟綁定data-ajax-mode//更新的形式 BEFORE插入到對象之前 AFTER插入到對象之后 為空就是覆蓋data-ajax-update//更新的對象data-ajax-confirm//設置一個確定取消彈出框的文字，沒有則不設置data-ajax-loading//顯示loading的對象data-ajax-loading-duration//持續時間 默認是0data-ajax-method//提交方式data-ajax-url//提交urldata-ajax-begin//ajax前觸發的函數或者一段程序data-ajax-complete//完成后(函數)，此時還沒有加載返回的數據，請求成功或失敗時均調用data-ajax-success//成功(函數)，加載完成的數據data-ajax-failure//失敗，error*/(function ($) {  var data_click = "unobtrusiveAjaxClick",    data_validation = "unobtrusiveValidation";  //第二核心，判斷是否函數，不是則構造一個匿名函數  function getFunction(code, argNames) {    var fn = window, parts = (code || "").split(".");    while (fn && parts.length) {      fn = fn[parts.shift()];    }//查找函數名有時候是命名空間比如xxx.xxx    if (typeof (fn) === "function") {      return fn;    }    argNames.push(code);    //如果不是函數對象則自己構造一個并返回，吊！    return Function.constructor.apply(null, argNames);  }  function isMethodProxySafe(method) {    return method === "GET" || method === "POST";  }  //可以添加各種提交方式，應該是為Web Api做的補充  function asyncOnBeforeSend(xhr, method) {    if (!isMethodProxySafe(method)) {      xhr.setRequestHeader("X-HTTP-Method-Override", method);    }    //注：X-HTTP-Method-Override是一個非標準的HTTP報頭。    //這是為不能發送某些HTTP請求類型（如PUT或DELETE）的客戶端而設計的  }  //完成后的  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;      }    });  }  //主要函數  //綁定的對象和參數  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;//默認是0    $.extend(options, {      type: element.getAttribute("data-ajax-method") || undefined,      url: element.getAttribute("data-ajax-url") || undefined,      beforeSend: function (xhr) {//ajax前觸發，此處的xhr將在下面用apply傳遞出去        var result;        asyncOnBeforeSend(xhr, method);//判斷是否添加特種的提交方式        result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);//argument：替換函數對象的其中一個屬性對象，存儲參數。這里是將原先的參數傳遞出去，吊！        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();//大寫    if (!isMethodProxySafe(method)) {      options.type = "POST";      options.data.push({ name: "X-HTTP-Method-Override", value: method });    }    //最后都是調用jquery的ajax    $.ajax(options);  }  function validate(form) {    //可以取消驗證    var validationInfo = $(form).data(data_validation);    return !validationInfo || !validationInfo.validate || validationInfo.validate();  }    $(document).on("click", "a[data-ajax=true]", function (evt) {    evt.preventDefault();    asyncRequest(this, {      url: this.href,      type: "GET",      data: []    });  });  $(document).on("click", "form[data-ajax=true] input[type=image]", function (evt) {//這個不常用    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);  });  $(document).on("click", "form[data-ajax=true] :submit", 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);  });  $(document).on("submit", "form[data-ajax=true]", 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())//寫得好，序列化表單并拼接，以后的ajax都可以這樣，方便啊    });  });  //擴展  function bindDataAjax(obj) {    $(obj).on("click", "a[data-ajax=true]", function (evt) {      evt.preventDefault();      asyncRequest(this, {        url: this.href,        type: "GET",        data: []      });    });    $(obj).on("click", "form[data-ajax=true] input[type=image]", function (evt) {//這個不常用      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);    });    $(obj).on("click", "form[data-ajax=true] :submit", 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);    });    $(obj).on("submit", "form[data-ajax=true]", 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())//寫得好，序列化表單并拼接，以后的ajax都可以這樣，方便啊      });    });  }  $.fn.unobtrusive = function (option, param) {    if (typeof options == "string") {      return $.fn.unobtrusive.methods[options](this, param);    }      }  //方法  $.fn.unobtrusive.methods = {    resetbind: function (jq) {//對應的對象重新初始化      return jq.each(function () {        //bindDataAjax($(this), obj);        //bindDataAjax(obj);        bindDataAjax(jq);      });    }  }}(jQuery));