/MvcMusicStore/Scripts/jquery.unobtrusive-ajax.js

  1/// <reference path="jquery-1.5.1.js" />
  2
  3/*!
  4** Unobtrusive Ajax support library for jQuery
  5** Copyright (C) Microsoft Corporation. All rights reserved.
  6*/
  7
  8/*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 */
  9/*global window: false, jQuery: false */
 10
 11(function ($) {
 12    var data_click = "unobtrusiveAjaxClick",
 13        data_validation = "unobtrusiveValidation";
 14
 15    function getFunction(code, argNames) {
 16        var fn = window, parts = (code || "").split(".");
 17        while (fn && parts.length) {
 18            fn = fn[parts.shift()];
 19        }
 20        if (typeof (fn) === "function") {
 21            return fn;
 22        }
 23        argNames.push(code);
 24        return Function.constructor.apply(null, argNames);
 25    }
 26
 27    function isMethodProxySafe(method) {
 28        return method === "GET" || method === "POST";
 29    }
 30
 31    function asyncOnBeforeSend(xhr, method) {
 32        if (!isMethodProxySafe(method)) {
 33            xhr.setRequestHeader("X-HTTP-Method-Override", method);
 34        }
 35    }
 36
 37    function asyncOnSuccess(element, data, contentType) {
 38        var mode;
 39
 40        if (contentType.indexOf("application/x-javascript") !== -1) {  // jQuery already executes JavaScript for us
 41            return;
 42        }
 43
 44        mode = (element.getAttribute("data-ajax-mode") || "").toUpperCase();
 45        $(element.getAttribute("data-ajax-update")).each(function (i, update) {
 46            var top;
 47
 48            switch (mode) {
 49            case "BEFORE":
 50                top = update.firstChild;
 51                $("<div />").html(data).contents().each(function () {
 52                    update.insertBefore(this, top);
 53                });
 54                break;
 55            case "AFTER":
 56                $("<div />").html(data).contents().each(function () {
 57                    update.appendChild(this);
 58                });
 59                break;
 60            default:
 61                $(update).html(data);
 62                break;
 63            }
 64        });
 65    }
 66
 67    function asyncRequest(element, options) {
 68        var confirm, loading, method, duration;
 69
 70        confirm = element.getAttribute("data-ajax-confirm");
 71        if (confirm && !window.confirm(confirm)) {
 72            return;
 73        }
 74
 75        loading = $(element.getAttribute("data-ajax-loading"));
 76        duration = element.getAttribute("data-ajax-loading-duration") || 0;
 77
 78        $.extend(options, {
 79            type: element.getAttribute("data-ajax-method") || undefined,
 80            url: element.getAttribute("data-ajax-url") || undefined,
 81            beforeSend: function (xhr) {
 82                var result;
 83                asyncOnBeforeSend(xhr, method);
 84                result = getFunction(element.getAttribute("data-ajax-begin"), ["xhr"]).apply(this, arguments);
 85                if (result !== false) {
 86                    loading.show(duration);
 87                }
 88                return result;
 89            },
 90            complete: function () {
 91                loading.hide(duration);
 92                getFunction(element.getAttribute("data-ajax-complete"), ["xhr", "status"]).apply(this, arguments);
 93            },
 94            success: function (data, status, xhr) {
 95                asyncOnSuccess(element, data, xhr.getResponseHeader("Content-Type") || "text/html");
 96                getFunction(element.getAttribute("data-ajax-success"), ["data", "status", "xhr"]).apply(this, arguments);
 97            },
 98            error: getFunction(element.getAttribute("data-ajax-failure"), ["xhr", "status", "error"])
 99        });
100
101        options.data.push({ name: "X-Requested-With", value: "XMLHttpRequest" });
102
103        method = options.type.toUpperCase();
104        if (!isMethodProxySafe(method)) {
105            options.type = "POST";
106            options.data.push({ name: "X-HTTP-Method-Override", value: method });
107        }
108
109        $.ajax(options);
110    }
111
112    function validate(form) {
113        var validationInfo = $(form).data(data_validation);
114        return !validationInfo || !validationInfo.validate || validationInfo.validate();
115    }
116
117    $("a[data-ajax=true]").live("click", function (evt) {
118        evt.preventDefault();
119        asyncRequest(this, {
120            url: this.href,
121            type: "GET",
122            data: []
123        });
124    });
125
126    $("form[data-ajax=true] input[type=image]").live("click", function (evt) {
127        var name = evt.target.name,
128            $target = $(evt.target),
129            form = $target.parents("form")[0],
130            offset = $target.offset();
131
132        $(form).data(data_click, [
133            { name: name + ".x", value: Math.round(evt.pageX - offset.left) },
134            { name: name + ".y", value: Math.round(evt.pageY - offset.top) }
135        ]);
136
137        setTimeout(function () {
138            $(form).removeData(data_click);
139        }, 0);
140    });
141
142    $("form[data-ajax=true] :submit").live("click", function (evt) {
143        var name = evt.target.name,
144            form = $(evt.target).parents("form")[0];
145
146        $(form).data(data_click, name ? [{ name: name, value: evt.target.value }] : []);
147
148        setTimeout(function () {
149            $(form).removeData(data_click);
150        }, 0);
151    });
152
153    $("form[data-ajax=true]").live("submit", function (evt) {
154        var clickInfo = $(this).data(data_click) || [];
155        evt.preventDefault();
156        if (!validate(this)) {
157            return;
158        }
159        asyncRequest(this, {
160            url: this.action,
161            type: this.method || "GET",
162            data: clickInfo.concat($(this).serializeArray())
163        });
164    });
165}(jQuery));