401 lines
16 KiB
JavaScript
401 lines
16 KiB
JavaScript
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(function($, undefined) {
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/**
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* Unobtrusive scripting adapter for jQuery
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* https://github.com/rails/jquery-ujs
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*
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* Requires jQuery 1.7.0 or later.
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*
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* Released under the MIT license
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*
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*/
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// Cut down on the number if issues from people inadvertently including jquery_ujs twice
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// by detecting and raising an error when it happens.
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var alreadyInitialized = function() {
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var events = $._data(document, 'events');
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return events && events.click && $.grep(events.click, function(e) { return e.namespace === 'rails'; }).length;
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}
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if ( alreadyInitialized() ) {
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$.error('jquery-ujs has already been loaded!');
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}
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// Shorthand to make it a little easier to call public rails functions from within rails.js
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var rails;
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$.rails = rails = {
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// Link elements bound by jquery-ujs
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linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',
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// Select elements bound by jquery-ujs
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inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',
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// Form elements bound by jquery-ujs
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formSubmitSelector: 'form',
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// Form input elements bound by jquery-ujs
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formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type])',
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// Form input elements disabled during form submission
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disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',
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// Form input elements re-enabled after form submission
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enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',
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// Form required input elements
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requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',
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// Form file input elements
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fileInputSelector: 'input[type=file]',
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// Link onClick disable selector with possible reenable after remote submission
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linkDisableSelector: 'a[data-disable-with]',
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// Make sure that every Ajax request sends the CSRF token
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CSRFProtection: function(xhr) {
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var token = $('meta[name="csrf-token"]').attr('content');
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if (token) xhr.setRequestHeader('X-CSRF-Token', token);
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},
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// Triggers an event on an element and returns false if the event result is false
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fire: function(obj, name, data) {
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var event = $.Event(name);
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obj.trigger(event, data);
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return event.result !== false;
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},
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// Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
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confirm: function(message) {
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return confirm(message);
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},
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// Default ajax function, may be overridden with custom function in $.rails.ajax
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ajax: function(options) {
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return $.ajax(options);
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},
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// Default way to get an element's href. May be overridden at $.rails.href.
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href: function(element) {
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return element.attr('href');
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},
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// Submits "remote" forms and links with ajax
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handleRemote: function(element) {
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var method, url, data, elCrossDomain, crossDomain, withCredentials, dataType, options;
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if (rails.fire(element, 'ajax:before')) {
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elCrossDomain = element.data('cross-domain');
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crossDomain = elCrossDomain === undefined ? null : elCrossDomain;
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withCredentials = element.data('with-credentials') || null;
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dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);
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if (element.is('form')) {
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method = element.attr('method');
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url = element.attr('action');
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data = element.serializeArray();
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// memoized value from clicked submit button
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var button = element.data('ujs:submit-button');
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if (button) {
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data.push(button);
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element.data('ujs:submit-button', null);
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}
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} else if (element.is(rails.inputChangeSelector)) {
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method = element.data('method');
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url = element.data('url');
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data = element.serialize();
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if (element.data('params')) data = data + "&" + element.data('params');
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} else {
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method = element.data('method');
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url = rails.href(element);
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data = element.data('params') || null;
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}
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options = {
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type: method || 'GET', data: data, dataType: dataType,
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// stopping the "ajax:beforeSend" event will cancel the ajax request
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beforeSend: function(xhr, settings) {
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if (settings.dataType === undefined) {
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xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
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}
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return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);
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},
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success: function(data, status, xhr) {
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element.trigger('ajax:success', [data, status, xhr]);
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},
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complete: function(xhr, status) {
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element.trigger('ajax:complete', [xhr, status]);
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},
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error: function(xhr, status, error) {
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element.trigger('ajax:error', [xhr, status, error]);
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},
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crossDomain: crossDomain
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};
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// There is no withCredentials for IE6-8 when
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// "Enable native XMLHTTP support" is disabled
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if (withCredentials) {
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options.xhrFields = {
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withCredentials: withCredentials
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};
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}
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// Only pass url to `ajax` options if not blank
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if (url) { options.url = url; }
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var jqxhr = rails.ajax(options);
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element.trigger('ajax:send', jqxhr);
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return jqxhr;
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} else {
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return false;
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}
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},
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// Handles "data-method" on links such as:
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// <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
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handleMethod: function(link) {
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var href = rails.href(link),
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method = link.data('method'),
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target = link.attr('target'),
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csrf_token = $('meta[name=csrf-token]').attr('content'),
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csrf_param = $('meta[name=csrf-param]').attr('content'),
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form = $('<form method="post" action="' + href + '"></form>'),
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metadata_input = '<input name="_method" value="' + method + '" type="hidden" />';
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if (csrf_param !== undefined && csrf_token !== undefined) {
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metadata_input += '<input name="' + csrf_param + '" value="' + csrf_token + '" type="hidden" />';
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}
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if (target) { form.attr('target', target); }
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form.hide().append(metadata_input).appendTo('body');
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form.submit();
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},
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/* Disables form elements:
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- Caches element value in 'ujs:enable-with' data store
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- Replaces element text with value of 'data-disable-with' attribute
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- Sets disabled property to true
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*/
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disableFormElements: function(form) {
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form.find(rails.disableSelector).each(function() {
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var element = $(this), method = element.is('button') ? 'html' : 'val';
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element.data('ujs:enable-with', element[method]());
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element[method](element.data('disable-with'));
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element.prop('disabled', true);
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});
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},
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/* Re-enables disabled form elements:
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- Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
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- Sets disabled property to false
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*/
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enableFormElements: function(form) {
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form.find(rails.enableSelector).each(function() {
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var element = $(this), method = element.is('button') ? 'html' : 'val';
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if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));
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element.prop('disabled', false);
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});
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},
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/* For 'data-confirm' attribute:
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- Fires `confirm` event
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- Shows the confirmation dialog
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- Fires the `confirm:complete` event
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Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
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Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
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Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
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return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
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*/
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allowAction: function(element) {
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var message = element.data('confirm'),
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answer = false, callback;
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if (!message) { return true; }
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if (rails.fire(element, 'confirm')) {
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answer = rails.confirm(message);
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callback = rails.fire(element, 'confirm:complete', [answer]);
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}
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return answer && callback;
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},
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// Helper function which checks for blank inputs in a form that match the specified CSS selector
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blankInputs: function(form, specifiedSelector, nonBlank) {
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var inputs = $(), input, valueToCheck,
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selector = specifiedSelector || 'input,textarea',
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allInputs = form.find(selector);
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allInputs.each(function() {
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input = $(this);
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valueToCheck = input.is('input[type=checkbox],input[type=radio]') ? input.is(':checked') : input.val();
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// If nonBlank and valueToCheck are both truthy, or nonBlank and valueToCheck are both falsey
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if (!valueToCheck === !nonBlank) {
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// Don't count unchecked required radio if other radio with same name is checked
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if (input.is('input[type=radio]') && allInputs.filter('input[type=radio]:checked[name="' + input.attr('name') + '"]').length) {
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return true; // Skip to next input
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}
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inputs = inputs.add(input);
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}
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});
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return inputs.length ? inputs : false;
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},
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// Helper function which checks for non-blank inputs in a form that match the specified CSS selector
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nonBlankInputs: function(form, specifiedSelector) {
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return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
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},
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// Helper function, needed to provide consistent behavior in IE
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stopEverything: function(e) {
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$(e.target).trigger('ujs:everythingStopped');
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e.stopImmediatePropagation();
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return false;
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},
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// find all the submit events directly bound to the form and
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// manually invoke them. If anyone returns false then stop the loop
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callFormSubmitBindings: function(form, event) {
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var events = form.data('events'), continuePropagation = true;
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if (events !== undefined && events['submit'] !== undefined) {
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$.each(events['submit'], function(i, obj){
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if (typeof obj.handler === 'function') return continuePropagation = obj.handler(event);
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});
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}
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return continuePropagation;
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},
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// replace element's html with the 'data-disable-with' after storing original html
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// and prevent clicking on it
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disableElement: function(element) {
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element.data('ujs:enable-with', element.html()); // store enabled state
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element.html(element.data('disable-with')); // set to disabled state
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element.bind('click.railsDisable', function(e) { // prevent further clicking
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return rails.stopEverything(e);
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});
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},
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// restore element to its original state which was disabled by 'disableElement' above
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enableElement: function(element) {
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if (element.data('ujs:enable-with') !== undefined) {
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element.html(element.data('ujs:enable-with')); // set to old enabled state
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// this should be element.removeData('ujs:enable-with')
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// but, there is currently a bug in jquery which makes hyphenated data attributes not get removed
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element.data('ujs:enable-with', false); // clean up cache
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}
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element.unbind('click.railsDisable'); // enable element
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}
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};
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if (rails.fire($(document), 'rails:attachBindings')) {
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$.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});
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$(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {
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rails.enableElement($(this));
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});
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$(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {
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var link = $(this), method = link.data('method'), data = link.data('params');
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if (!rails.allowAction(link)) return rails.stopEverything(e);
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if (link.is(rails.linkDisableSelector)) rails.disableElement(link);
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if (link.data('remote') !== undefined) {
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if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }
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var handleRemote = rails.handleRemote(link);
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// response from rails.handleRemote() will either be false or a deferred object promise.
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if (handleRemote === false) {
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rails.enableElement(link);
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} else {
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handleRemote.error( function() { rails.enableElement(link); } );
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}
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return false;
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} else if (link.data('method')) {
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rails.handleMethod(link);
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return false;
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}
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});
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$(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {
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var link = $(this);
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if (!rails.allowAction(link)) return rails.stopEverything(e);
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rails.handleRemote(link);
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return false;
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});
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$(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {
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var form = $(this),
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remote = form.data('remote') !== undefined,
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blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),
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nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);
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if (!rails.allowAction(form)) return rails.stopEverything(e);
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// skip other logic when required values are missing or file upload is present
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if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
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return rails.stopEverything(e);
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}
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if (remote) {
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if (nonBlankFileInputs) {
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// slight timeout so that the submit button gets properly serialized
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// (make it easy for event handler to serialize form without disabled values)
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setTimeout(function(){ rails.disableFormElements(form); }, 13);
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var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);
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// re-enable form elements if event bindings return false (canceling normal form submission)
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if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }
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return aborted;
|
||
|
|
}
|
||
|
|
|
||
|
|
// If browser does not support submit bubbling, then this live-binding will be called before direct
|
||
|
|
// bindings. Therefore, we should directly call any direct bindings before remotely submitting form.
|
||
|
|
if (!$.support.submitBubbles && $().jquery < '1.7' && rails.callFormSubmitBindings(form, e) === false) return rails.stopEverything(e);
|
||
|
|
|
||
|
|
rails.handleRemote(form);
|
||
|
|
return false;
|
||
|
|
|
||
|
|
} else {
|
||
|
|
// slight timeout so that the submit button gets properly serialized
|
||
|
|
setTimeout(function(){ rails.disableFormElements(form); }, 13);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
|
||
|
|
$(document).delegate(rails.formInputClickSelector, 'click.rails', function(event) {
|
||
|
|
var button = $(this);
|
||
|
|
|
||
|
|
if (!rails.allowAction(button)) return rails.stopEverything(event);
|
||
|
|
|
||
|
|
// register the pressed submit button
|
||
|
|
var name = button.attr('name'),
|
||
|
|
data = name ? {name:name, value:button.val()} : null;
|
||
|
|
|
||
|
|
button.closest('form').data('ujs:submit-button', data);
|
||
|
|
});
|
||
|
|
|
||
|
|
$(document).delegate(rails.formSubmitSelector, 'ajax:beforeSend.rails', function(event) {
|
||
|
|
if (this == event.target) rails.disableFormElements($(this));
|
||
|
|
});
|
||
|
|
|
||
|
|
$(document).delegate(rails.formSubmitSelector, 'ajax:complete.rails', function(event) {
|
||
|
|
if (this == event.target) rails.enableFormElements($(this));
|
||
|
|
});
|
||
|
|
|
||
|
|
$(function(){
|
||
|
|
// making sure that all forms have actual up-to-date token(cached forms contain old one)
|
||
|
|
var csrf_token = $('meta[name=csrf-token]').attr('content');
|
||
|
|
var csrf_param = $('meta[name=csrf-param]').attr('content');
|
||
|
|
$('form input[name="' + csrf_param + '"]').val(csrf_token);
|
||
|
|
});
|
||
|
|
}
|
||
|
|
|
||
|
|
})( jQuery );
|