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(function($, undefined) {

/**

* Unobtrusive scripting adapter for jQuery

* Requires jQuery 1.6.0 or later.

* https://github.com/rails/jquery-ujs

* Uploading file using rails.js

* =============================

* By default, browsers do not allow files to be uploaded via AJAX. As a result, if there are any non-blank file fields

* in the remote form, this adapter aborts the AJAX submission and allows the form to submit through standard means.

* The `ajax:aborted:file` event allows you to bind your own handler to process the form submission however you wish.

* Ex:

* $('form').live('ajax:aborted:file', function(event, elements){

* // Implement own remote file-transfer handler here for non-blank file inputs passed in `elements`.

* // Returning false in this handler tells rails.js to disallow standard form submission

* return false;

* });

* The `ajax:aborted:file` event is fired when a file-type input is detected with a non-blank value.

* Third-party tools can use this hook to detect when an AJAX file upload is attempted, and then use

* techniques like the iframe method to upload the file instead.

* Required fields in rails.js

* ===========================

* If any blank required inputs (required="required") are detected in the remote form, the whole form submission

* is canceled. Note that this is unlike file inputs, which still allow standard (non-AJAX) form submission.

* The `ajax:aborted:required` event allows you to bind your own handler to inform the user of blank required inputs.

* !! Note that Opera does not fire the form's submit event if there are blank required inputs, so this event may never

* get fired in Opera. This event is what causes other browsers to exhibit the same submit-aborting behavior.

* Ex:

* $('form').live('ajax:aborted:required', function(event, elements){

* // Returning false in this handler tells rails.js to submit the form anyway.

* // The blank required inputs are passed to this function in `elements`.

* return ! confirm("Would you like to submit the form with missing info?");

* });

// Cut down on the number if issues from people inadvertently including jquery_ujs twice

// by detecting and raising an error when it happens.

var alreadyInitialized = function() {

var events = $._data(document, 'events');

return events && events.click && $.grep(events.click, function(e) { return e.namespace === 'rails'; }).length;

}

if ( alreadyInitialized() ) {

$.error('jquery-ujs has already been loaded!');

}

// Shorthand to make it a little easier to call public rails functions from within rails.js

var rails;

$.rails = rails = {

// Link elements bound by jquery-ujs

linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',

// Select elements bound by jquery-ujs

inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',

// Form elements bound by jquery-ujs

formSubmitSelector: 'form',

// Form input elements bound by jquery-ujs

formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not(button[type])',

formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type])',

// Form input elements disabled during form submission

disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',

// Form input elements re-enabled after form submission

enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',

// Form required input elements

requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',

// Form file input elements

fileInputSelector: 'input:file',

// Link onClick disable selector with possible reenable after remote submission

linkDisableSelector: 'a[data-disable-with]',

// Make sure that every Ajax request sends the CSRF token

CSRFProtection: function(xhr) {

var token = $('meta[name="csrf-token"]').attr('content');

if (token) xhr.setRequestHeader('X-CSRF-Token', token);

// Triggers an event on an element and returns false if the event result is false

fire: function(obj, name, data) {

var event = $.Event(name);

obj.trigger(event, data);

return event.result !== false;

// Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm

confirm: function(message) {

return confirm(message);

// Default ajax function, may be overridden with custom function in $.rails.ajax

ajax: function(options) {

return $.ajax(options);

// Default way to get an element's href. May be overridden at $.rails.href.

href: function(element) {

return element.attr('href');

// Submits "remote" forms and links with ajax

handleRemote: function(element) {

var method, url, data,

var method, url, data, elCrossDomain, crossDomain, withCredentials, dataType, options;

crossDomain = element.data('cross-domain') || null,

dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType),

options;

if (rails.fire(element, 'ajax:before')) {

elCrossDomain = element.data('cross-domain');

crossDomain = elCrossDomain === undefined ? null : elCrossDomain;

withCredentials = element.data('with-credentials') || null;

dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);

if (element.is('form')) {

method = element.attr('method');

url = element.attr('action');

data = element.serializeArray();

// memoized value from clicked submit button

var button = element.data('ujs:submit-button');

if (button) {

data.push(button);

element.data('ujs:submit-button', null);

}

} else if (element.is(rails.inputChangeSelector)) {

method = element.data('method');

url = element.data('url');

data = element.serialize();

if (element.data('params')) data = data + "&" + element.data('params');

} else {

method = element.data('method');

url = element.attr('href');

url = rails.href(element);

data = element.data('params') || null;

}

options = {

type: method || 'GET', data: data, dataType: dataType, crossDomain: crossDomain,

type: method || 'GET', data: data, dataType: dataType,

// stopping the "ajax:beforeSend" event will cancel the ajax request

beforeSend: function(xhr, settings) {

if (settings.dataType === undefined) {

xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);

}

return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);

success: function(data, status, xhr) {

element.trigger('ajax:success', [data, status, xhr]);

complete: function(xhr, status) {

element.trigger('ajax:complete', [xhr, status]);

error: function(xhr, status, error) {

element.trigger('ajax:error', [xhr, status, error]);

}

xhrFields: {

withCredentials: withCredentials

crossDomain: crossDomain

};

// Only pass url to `ajax` options if not blank

if (url) { options.url = url; }

return rails.ajax(options);

var jqxhr = rails.ajax(options);

element.trigger('ajax:send', jqxhr);

return jqxhr;

} else {

return false;

}

// Handles "data-method" on links such as:

// <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>

handleMethod: function(link) {

var href = link.attr('href'),

var href = rails.href(link),

method = link.data('method'),

target = link.attr('target'),

csrf_token = $('meta[name=csrf-token]').attr('content'),

csrf_param = $('meta[name=csrf-param]').attr('content'),

form = $('<form method="post" action="' + href + '"></form>'),

metadata_input = '<input name="_method" value="' + method + '" type="hidden" />';

if (csrf_param !== undefined && csrf_token !== undefined) {

metadata_input += '<input name="' + csrf_param + '" value="' + csrf_token + '" type="hidden" />';

}

if (target) { form.attr('target', target); }

form.hide().append(metadata_input).appendTo('body');

form.submit();

/* Disables form elements:

- Caches element value in 'ujs:enable-with' data store

- Replaces element text with value of 'data-disable-with' attribute

- Sets disabled property to true

disableFormElements: function(form) {

form.find(rails.disableSelector).each(function() {

var element = $(this), method = element.is('button') ? 'html' : 'val';

element.data('ujs:enable-with', element[method]());

element[method](element.data('disable-with'));

element.prop('disabled', true);

});

/* Re-enables disabled form elements:

- Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)

- Sets disabled property to false

enableFormElements: function(form) {

form.find(rails.enableSelector).each(function() {

var element = $(this), method = element.is('button') ? 'html' : 'val';

if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));

element.prop('disabled', false);

});

/* For 'data-confirm' attribute:

- Fires `confirm` event

- Shows the confirmation dialog

- Fires the `confirm:complete` event

Returns `true` if no function stops the chain and user chose yes; `false` otherwise.

Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.

Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function

return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.

allowAction: function(element) {

var message = element.data('confirm'),

answer = false, callback;

if (!message) { return true; }

if (rails.fire(element, 'confirm')) {

answer = rails.confirm(message);

callback = rails.fire(element, 'confirm:complete', [answer]);

}

return answer && callback;

// Helper function which checks for blank inputs in a form that match the specified CSS selector

blankInputs: function(form, specifiedSelector, nonBlank) {

var inputs = $(), input,

var inputs = $(), input, valueToCheck,

selector = specifiedSelector || 'input,textarea';

selector = specifiedSelector || 'input,textarea',

form.find(selector).each(function() {

allInputs = form.find(selector);

allInputs.each(function() {

input = $(this);

// Collect non-blank inputs if nonBlank option is true, otherwise, collect blank inputs

valueToCheck = input.is(':checkbox,:radio') ? input.is(':checked') : input.val();

if (nonBlank ? input.val() : !input.val()) {

// If nonBlank and valueToCheck are both truthy, or nonBlank and valueToCheck are both falsey

if (!valueToCheck === !nonBlank) {

// Don't count unchecked required radio if other radio with same name is checked

if (input.is(':radio') && allInputs.filter('input:radio:checked[name="' + input.attr('name') + '"]').length) {

return true; // Skip to next input

}

inputs = inputs.add(input);

}

});

return inputs.length ? inputs : false;

// Helper function which checks for non-blank inputs in a form that match the specified CSS selector

nonBlankInputs: function(form, specifiedSelector) {

return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank

// Helper function, needed to provide consistent behavior in IE

stopEverything: function(e) {

$(e.target).trigger('ujs:everythingStopped');

e.stopImmediatePropagation();

return false;

// find all the submit events directly bound to the form and

// manually invoke them. If anyone returns false then stop the loop

callFormSubmitBindings: function(form, event) {

var events = form.data('events'), continuePropagation = true;

if (events !== undefined && events['submit'] !== undefined) {

$.each(events['submit'], function(i, obj){

if (typeof obj.handler === 'function') return continuePropagation = obj.handler(event);

});

}

return continuePropagation;

// replace element's html with the 'data-disable-with' after storing original html

// and prevent clicking on it

disableElement: function(element) {

element.data('ujs:enable-with', element.html()); // store enabled state

element.html(element.data('disable-with')); // set to disabled state

element.bind('click.railsDisable', function(e) { // prevent further clicking

return rails.stopEverything(e)

return rails.stopEverything(e);

});

// restore element to its original state which was disabled by 'disableElement' above

enableElement: function(element) {

if (element.data('ujs:enable-with') !== undefined) {

element.html(element.data('ujs:enable-with')); // set to old enabled state

// this should be element.removeData('ujs:enable-with')

// but, there is currently a bug in jquery which makes hyphenated data attributes not get removed

element.data('ujs:enable-with', false); // clean up cache

}

element.unbind('click.railsDisable'); // enable element

}

};

$.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

if (rails.fire($(document), 'rails:attachBindings')) {

$(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {

$.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

rails.enableElement($(this));

});

$(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {

$(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {

var link = $(this), method = link.data('method'), data = link.data('params');

rails.enableElement($(this));

if (!rails.allowAction(link)) return rails.stopEverything(e);

});

if (link.is(rails.linkDisableSelector)) rails.disableElement(link);

$(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {

var link = $(this), method = link.data('method'), data = link.data('params');

if (!rails.allowAction(link)) return rails.stopEverything(e);

if (link.data('remote') !== undefined) {

if (link.is(rails.linkDisableSelector)) rails.disableElement(link);

if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }

if (rails.handleRemote(link) === false) { rails.enableElement(link); }

if (link.data('remote') !== undefined) {

return false;

if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }

} else if (link.data('method')) {

var handleRemote = rails.handleRemote(link);

rails.handleMethod(link);

// response from rails.handleRemote() will either be false or a deferred object promise.

return false;

if (handleRemote === false) {

}

rails.enableElement(link);

});

} else {

handleRemote.error( function() { rails.enableElement(link); } );

}

return false;

$(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {

} else if (link.data('method')) {

var link = $(this);

rails.handleMethod(link);

if (!rails.allowAction(link)) return rails.stopEverything(e);

return false;

}

});

rails.handleRemote(link);

$(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {

return false;

var link = $(this);

});

if (!rails.allowAction(link)) return rails.stopEverything(e);

$(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {

rails.handleRemote(link);

var form = $(this),

return false;

remote = form.data('remote') !== undefined,

});

blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),

nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);

if (!rails.allowAction(form)) return rails.stopEverything(e);

$(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {

var form = $(this),

remote = form.data('remote') !== undefined,

blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),

nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);

// skip other logic when required values are missing or file upload is present

if (!rails.allowAction(form)) return rails.stopEverything(e);

if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {

return rails.stopEverything(e);

}

if (remote) {

// skip other logic when required values are missing or file upload is present

if (nonBlankFileInputs) {

if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {

return rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);

return rails.stopEverything(e);

}

// If browser does not support submit bubbling, then this live-binding will be called before direct

if (remote) {

// bindings. Therefore, we should directly call any direct bindings before remotely submitting form.

if (nonBlankFileInputs) {

if (!$.support.submitBubbles && $().jquery < '1.7' && rails.callFormSubmitBindings(form, e) === false) return rails.stopEverything(e);

// slight timeout so that the submit button gets properly serialized

// (make it easy for event handler to serialize form without disabled values)

setTimeout(function(){ rails.disableFormElements(form); }, 13);

var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);

rails.handleRemote(form);

// re-enable form elements if event bindings return false (canceling normal form submission)

return false;

if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }

} else {

return aborted;

// slight timeout so that the submit button gets properly serialized

}

setTimeout(function(){ rails.disableFormElements(form); }, 13);

}

});

$(document).delegate(rails.formInputClickSelector, 'click.rails', function(event) {

// If browser does not support submit bubbling, then this live-binding will be called before direct

var button = $(this);

// 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);

if (!rails.allowAction(button)) return rails.stopEverything(event);

rails.handleRemote(form);

return false;

// register the pressed submit button

} else {

var name = button.attr('name'),

// slight timeout so that the submit button gets properly serialized

data = name ? {name:name, value:button.val()} : null;

setTimeout(function(){ rails.disableFormElements(form); }, 13);

}

});

button.closest('form').data('ujs:submit-button', data);

$(document).delegate(rails.formInputClickSelector, 'click.rails', function(event) {

});

var button = $(this);

$(document).delegate(rails.formSubmitSelector, 'ajax:beforeSend.rails', function(event) {

if (!rails.allowAction(button)) return rails.stopEverything(event);

if (this == event.target) rails.disableFormElements($(this));

});

$(document).delegate(rails.formSubmitSelector, 'ajax:complete.rails', function(event) {

// register the pressed submit button

if (this == event.target) rails.enableFormElements($(this));

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)

csrf_token = $('meta[name=csrf-token]').attr('content');

csrf_param = $('meta[name=csrf-param]').attr('content');

$('form input[name="' + csrf_param + '"]').val(csrf_token);

});

}

})( jQuery );

Saved diffs

Original text

Open file

(function($, undefined) {

/**
 * Unobtrusive scripting adapter for jQuery
 *
 * Requires jQuery 1.6.0 or later.
 * https://github.com/rails/jquery-ujs

 * Uploading file using rails.js
 * =============================
 *
 * By default, browsers do not allow files to be uploaded via AJAX. As a result, if there are any non-blank file fields
 * in the remote form, this adapter aborts the AJAX submission and allows the form to submit through standard means.
 *
 * The `ajax:aborted:file` event allows you to bind your own handler to process the form submission however you wish.
 *
 * Ex:
 *     $('form').live('ajax:aborted:file', function(event, elements){
 *       // Implement own remote file-transfer handler here for non-blank file inputs passed in `elements`.
 *       // Returning false in this handler tells rails.js to disallow standard form submission
 *       return false;
 *     });
 *
 * The `ajax:aborted:file` event is fired when a file-type input is detected with a non-blank value.
 *
 * Third-party tools can use this hook to detect when an AJAX file upload is attempted, and then use
 * techniques like the iframe method to upload the file instead.
 *
 * Required fields in rails.js
 * ===========================
 *
 * If any blank required inputs (required="required") are detected in the remote form, the whole form submission
 * is canceled. Note that this is unlike file inputs, which still allow standard (non-AJAX) form submission.
 *
 * The `ajax:aborted:required` event allows you to bind your own handler to inform the user of blank required inputs.
 *
 * !! Note that Opera does not fire the form's submit event if there are blank required inputs, so this event may never
 *    get fired in Opera. This event is what causes other browsers to exhibit the same submit-aborting behavior.
 *
 * Ex:
 *     $('form').live('ajax:aborted:required', function(event, elements){
 *       // Returning false in this handler tells rails.js to submit the form anyway.
 *       // The blank required inputs are passed to this function in `elements`.
 *       return ! confirm("Would you like to submit the form with missing info?");
 *     });
 */

  // Shorthand to make it a little easier to call public rails functions from within rails.js
  var rails;

  $.rails = rails = {
    // Link elements bound by jquery-ujs
    linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',

    // Select elements bound by jquery-ujs
    inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',

    // Form elements bound by jquery-ujs
    formSubmitSelector: 'form',

    // Form input elements bound by jquery-ujs
    formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not(button[type])',

    // Form input elements disabled during form submission
    disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',

    // Form input elements re-enabled after form submission
    enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',

    // Form required input elements
    requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',

    // Form file input elements
    fileInputSelector: 'input:file',

    // Link onClick disable selector with possible reenable after remote submission
    linkDisableSelector: 'a[data-disable-with]',

    // Make sure that every Ajax request sends the CSRF token
    CSRFProtection: function(xhr) {
      var token = $('meta[name="csrf-token"]').attr('content');
      if (token) xhr.setRequestHeader('X-CSRF-Token', token);
    },

    // Triggers an event on an element and returns false if the event result is false
    fire: function(obj, name, data) {
      var event = $.Event(name);
      obj.trigger(event, data);
      return event.result !== false;
    },

    // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
    confirm: function(message) {
      return confirm(message);
    },

    // Default ajax function, may be overridden with custom function in $.rails.ajax
    ajax: function(options) {
      return $.ajax(options);
    },

    // Submits "remote" forms and links with ajax
    handleRemote: function(element) {
      var method, url, data,
        crossDomain = element.data('cross-domain') || null,
        dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType),
        options;

      if (rails.fire(element, 'ajax:before')) {

        if (element.is('form')) {
          method = element.attr('method');
          url = element.attr('action');
          data = element.serializeArray();
          // memoized value from clicked submit button
          var button = element.data('ujs:submit-button');
          if (button) {
            data.push(button);
            element.data('ujs:submit-button', null);
          }
        } else if (element.is(rails.inputChangeSelector)) {
          method = element.data('method');
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + "&" + element.data('params');
        } else {
          method = element.data('method');
          url = element.attr('href');
          data = element.data('params') || null;
        }

        options = {
          type: method || 'GET', data: data, dataType: dataType, crossDomain: crossDomain,
          // stopping the "ajax:beforeSend" event will cancel the ajax request
          beforeSend: function(xhr, settings) {
            if (settings.dataType === undefined) {
              xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
            }
            return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);
          },
          success: function(data, status, xhr) {
            element.trigger('ajax:success', [data, status, xhr]);
          },
          complete: function(xhr, status) {
            element.trigger('ajax:complete', [xhr, status]);
          },
          error: function(xhr, status, error) {
            element.trigger('ajax:error', [xhr, status, error]);
          }
        };
        // Only pass url to `ajax` options if not blank
        if (url) { options.url = url; }

        return rails.ajax(options);
      } else {
        return false;
      }
    },

    // Handles "data-method" on links such as:
    // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
    handleMethod: function(link) {
      var href = link.attr('href'),
        method = link.data('method'),
        target = link.attr('target'),
        csrf_token = $('meta[name=csrf-token]').attr('content'),
        csrf_param = $('meta[name=csrf-param]').attr('content'),
        form = $('<form method="post" action="' + href + '"></form>'),
        metadata_input = '<input name="_method" value="' + method + '" type="hidden" />';

      if (csrf_param !== undefined && csrf_token !== undefined) {
        metadata_input += '<input name="' + csrf_param + '" value="' + csrf_token + '" type="hidden" />';
      }

      if (target) { form.attr('target', target); }

      form.hide().append(metadata_input).appendTo('body');
      form.submit();
    },

    /* Disables form elements:
      - Caches element value in 'ujs:enable-with' data store
      - Replaces element text with value of 'data-disable-with' attribute
      - Sets disabled property to true
    */
    disableFormElements: function(form) {
      form.find(rails.disableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        element.data('ujs:enable-with', element[method]());
        element[method](element.data('disable-with'));
        element.prop('disabled', true);
      });
    },

    /* Re-enables disabled form elements:
      - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
      - Sets disabled property to false
    */
    enableFormElements: function(form) {
      form.find(rails.enableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));
        element.prop('disabled', false);
      });
    },

   /* For 'data-confirm' attribute:
      - Fires `confirm` event
      - Shows the confirmation dialog
      - Fires the `confirm:complete` event

      Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
      Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
      Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
      return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
   */
    allowAction: function(element) {
      var message = element.data('confirm'),
          answer = false, callback;
      if (!message) { return true; }

      if (rails.fire(element, 'confirm')) {
        answer = rails.confirm(message);
        callback = rails.fire(element, 'confirm:complete', [answer]);
      }
      return answer && callback;
    },

    // Helper function which checks for blank inputs in a form that match the specified CSS selector
    blankInputs: function(form, specifiedSelector, nonBlank) {
      var inputs = $(), input,
        selector = specifiedSelector || 'input,textarea';
      form.find(selector).each(function() {
        input = $(this);
        // Collect non-blank inputs if nonBlank option is true, otherwise, collect blank inputs
        if (nonBlank ? input.val() : !input.val()) {
          inputs = inputs.add(input);
        }
      });
      return inputs.length ? inputs : false;
    },

    // Helper function which checks for non-blank inputs in a form that match the specified CSS selector
    nonBlankInputs: function(form, specifiedSelector) {
      return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
    },

    // Helper function, needed to provide consistent behavior in IE
    stopEverything: function(e) {
      $(e.target).trigger('ujs:everythingStopped');
      e.stopImmediatePropagation();
      return false;
    },

    // find all the submit events directly bound to the form and
    // manually invoke them. If anyone returns false then stop the loop
    callFormSubmitBindings: function(form, event) {
      var events = form.data('events'), continuePropagation = true;
      if (events !== undefined && events['submit'] !== undefined) {
        $.each(events['submit'], function(i, obj){
          if (typeof obj.handler === 'function') return continuePropagation = obj.handler(event);
        });
      }
      return continuePropagation;
    },

    //  replace element's html with the 'data-disable-with' after storing original html
    //  and prevent clicking on it
    disableElement: function(element) {
      element.data('ujs:enable-with', element.html()); // store enabled state
      element.html(element.data('disable-with')); // set to disabled state
      element.bind('click.railsDisable', function(e) { // prevent further clicking
        return rails.stopEverything(e)
      });
    },

    // restore element to its original state which was disabled by 'disableElement' above
    enableElement: function(element) {
      if (element.data('ujs:enable-with') !== undefined) {
        element.html(element.data('ujs:enable-with')); // set to old enabled state
        // this should be element.removeData('ujs:enable-with')
        // but, there is currently a bug in jquery which makes hyphenated data attributes not get removed
        element.data('ujs:enable-with', false); // clean up cache
      }
      element.unbind('click.railsDisable'); // enable element
    }

  };

  $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

  $(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {
      rails.enableElement($(this));
  });

  $(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {
    var link = $(this), method = link.data('method'), data = link.data('params');
    if (!rails.allowAction(link)) return rails.stopEverything(e);

    if (link.is(rails.linkDisableSelector)) rails.disableElement(link);

    if (link.data('remote') !== undefined) {
      if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }

      if (rails.handleRemote(link) === false) { rails.enableElement(link); }
      return false;

    } else if (link.data('method')) {
      rails.handleMethod(link);
      return false;
    }
  });

  $(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {
    var link = $(this);
    if (!rails.allowAction(link)) return rails.stopEverything(e);

    rails.handleRemote(link);
    return false;
  });

  $(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {
    var form = $(this),
      remote = form.data('remote') !== undefined,
      blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),
      nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);

    if (!rails.allowAction(form)) return rails.stopEverything(e);

    // skip other logic when required values are missing or file upload is present
    if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
      return rails.stopEverything(e);
    }

    if (remote) {
      if (nonBlankFileInputs) {
        return rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);
      }

      // 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));
  });

})( jQuery );

Changed text

Open file

(function($, undefined) {

/**
 * Unobtrusive scripting adapter for jQuery
 *
 * Requires jQuery 1.6.0 or later.
 * https://github.com/rails/jquery-ujs

 * Uploading file using rails.js
 * =============================
 *
 * By default, browsers do not allow files to be uploaded via AJAX. As a result, if there are any non-blank file fields
 * in the remote form, this adapter aborts the AJAX submission and allows the form to submit through standard means.
 *
 * The `ajax:aborted:file` event allows you to bind your own handler to process the form submission however you wish.
 *
 * Ex:
 *     $('form').live('ajax:aborted:file', function(event, elements){
 *       // Implement own remote file-transfer handler here for non-blank file inputs passed in `elements`.
 *       // Returning false in this handler tells rails.js to disallow standard form submission
 *       return false;
 *     });
 *
 * The `ajax:aborted:file` event is fired when a file-type input is detected with a non-blank value.
 *
 * Third-party tools can use this hook to detect when an AJAX file upload is attempted, and then use
 * techniques like the iframe method to upload the file instead.
 *
 * Required fields in rails.js
 * ===========================
 *
 * If any blank required inputs (required="required") are detected in the remote form, the whole form submission
 * is canceled. Note that this is unlike file inputs, which still allow standard (non-AJAX) form submission.
 *
 * The `ajax:aborted:required` event allows you to bind your own handler to inform the user of blank required inputs.
 *
 * !! Note that Opera does not fire the form's submit event if there are blank required inputs, so this event may never
 *    get fired in Opera. This event is what causes other browsers to exhibit the same submit-aborting behavior.
 *
 * Ex:
 *     $('form').live('ajax:aborted:required', function(event, elements){
 *       // Returning false in this handler tells rails.js to submit the form anyway.
 *       // The blank required inputs are passed to this function in `elements`.
 *       return ! confirm("Would you like to submit the form with missing info?");
 *     });
 */

  // Cut down on the number if issues from people inadvertently including jquery_ujs twice
  // by detecting and raising an error when it happens.
  var alreadyInitialized = function() {
    var events = $._data(document, 'events');
    return events && events.click && $.grep(events.click, function(e) { return e.namespace === 'rails'; }).length;
  }

  if ( alreadyInitialized() ) {
    $.error('jquery-ujs has already been loaded!');
  }

  // Shorthand to make it a little easier to call public rails functions from within rails.js
  var rails;

  $.rails = rails = {
    // Link elements bound by jquery-ujs
    linkClickSelector: 'a[data-confirm], a[data-method], a[data-remote], a[data-disable-with]',

    // Select elements bound by jquery-ujs
    inputChangeSelector: 'select[data-remote], input[data-remote], textarea[data-remote]',

    // Form elements bound by jquery-ujs
    formSubmitSelector: 'form',

    // Form input elements bound by jquery-ujs
    formInputClickSelector: 'form input[type=submit], form input[type=image], form button[type=submit], form button:not([type])',

    // Form input elements disabled during form submission
    disableSelector: 'input[data-disable-with], button[data-disable-with], textarea[data-disable-with]',

    // Form input elements re-enabled after form submission
    enableSelector: 'input[data-disable-with]:disabled, button[data-disable-with]:disabled, textarea[data-disable-with]:disabled',

    // Form required input elements
    requiredInputSelector: 'input[name][required]:not([disabled]),textarea[name][required]:not([disabled])',

    // Form file input elements
    fileInputSelector: 'input:file',

    // Link onClick disable selector with possible reenable after remote submission
    linkDisableSelector: 'a[data-disable-with]',

    // Make sure that every Ajax request sends the CSRF token
    CSRFProtection: function(xhr) {
      var token = $('meta[name="csrf-token"]').attr('content');
      if (token) xhr.setRequestHeader('X-CSRF-Token', token);
    },

    // Triggers an event on an element and returns false if the event result is false
    fire: function(obj, name, data) {
      var event = $.Event(name);
      obj.trigger(event, data);
      return event.result !== false;
    },

    // Default confirm dialog, may be overridden with custom confirm dialog in $.rails.confirm
    confirm: function(message) {
      return confirm(message);
    },

    // Default ajax function, may be overridden with custom function in $.rails.ajax
    ajax: function(options) {
      return $.ajax(options);
    },

    // Default way to get an element's href. May be overridden at $.rails.href.
    href: function(element) {
      return element.attr('href');
    },

    // Submits "remote" forms and links with ajax
    handleRemote: function(element) {
      var method, url, data, elCrossDomain, crossDomain, withCredentials, dataType, options;

      if (rails.fire(element, 'ajax:before')) {
        elCrossDomain = element.data('cross-domain');
        crossDomain = elCrossDomain === undefined ? null : elCrossDomain;
        withCredentials = element.data('with-credentials') || null;
        dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);

        if (element.is('form')) {
          method = element.attr('method');
          url = element.attr('action');
          data = element.serializeArray();
          // memoized value from clicked submit button
          var button = element.data('ujs:submit-button');
          if (button) {
            data.push(button);
            element.data('ujs:submit-button', null);
          }
        } else if (element.is(rails.inputChangeSelector)) {
          method = element.data('method');
          url = element.data('url');
          data = element.serialize();
          if (element.data('params')) data = data + "&" + element.data('params');
        } else {
          method = element.data('method');
          url = rails.href(element);
          data = element.data('params') || null;
        }

        options = {
          type: method || 'GET', data: data, dataType: dataType,
          // stopping the "ajax:beforeSend" event will cancel the ajax request
          beforeSend: function(xhr, settings) {
            if (settings.dataType === undefined) {
              xhr.setRequestHeader('accept', '*/*;q=0.5, ' + settings.accepts.script);
            }
            return rails.fire(element, 'ajax:beforeSend', [xhr, settings]);
          },
          success: function(data, status, xhr) {
            element.trigger('ajax:success', [data, status, xhr]);
          },
          complete: function(xhr, status) {
            element.trigger('ajax:complete', [xhr, status]);
          },
          error: function(xhr, status, error) {
            element.trigger('ajax:error', [xhr, status, error]);
          },
          xhrFields: {
            withCredentials: withCredentials
          },
          crossDomain: crossDomain
        };
        // Only pass url to `ajax` options if not blank
        if (url) { options.url = url; }

        var jqxhr = rails.ajax(options);
        element.trigger('ajax:send', jqxhr);
        return jqxhr;
      } else {
        return false;
      }
    },

    // Handles "data-method" on links such as:
    // <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
    handleMethod: function(link) {
      var href = rails.href(link),
        method = link.data('method'),
        target = link.attr('target'),
        csrf_token = $('meta[name=csrf-token]').attr('content'),
        csrf_param = $('meta[name=csrf-param]').attr('content'),
        form = $('<form method="post" action="' + href + '"></form>'),
        metadata_input = '<input name="_method" value="' + method + '" type="hidden" />';

      if (csrf_param !== undefined && csrf_token !== undefined) {
        metadata_input += '<input name="' + csrf_param + '" value="' + csrf_token + '" type="hidden" />';
      }

      if (target) { form.attr('target', target); }

      form.hide().append(metadata_input).appendTo('body');
      form.submit();
    },

    /* Disables form elements:
      - Caches element value in 'ujs:enable-with' data store
      - Replaces element text with value of 'data-disable-with' attribute
      - Sets disabled property to true
    */
    disableFormElements: function(form) {
      form.find(rails.disableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        element.data('ujs:enable-with', element[method]());
        element[method](element.data('disable-with'));
        element.prop('disabled', true);
      });
    },

    /* Re-enables disabled form elements:
      - Replaces element text with cached value from 'ujs:enable-with' data store (created in `disableFormElements`)
      - Sets disabled property to false
    */
    enableFormElements: function(form) {
      form.find(rails.enableSelector).each(function() {
        var element = $(this), method = element.is('button') ? 'html' : 'val';
        if (element.data('ujs:enable-with')) element[method](element.data('ujs:enable-with'));
        element.prop('disabled', false);
      });
    },

   /* For 'data-confirm' attribute:
      - Fires `confirm` event
      - Shows the confirmation dialog
      - Fires the `confirm:complete` event

      Returns `true` if no function stops the chain and user chose yes; `false` otherwise.
      Attaching a handler to the element's `confirm` event that returns a `falsy` value cancels the confirmation dialog.
      Attaching a handler to the element's `confirm:complete` event that returns a `falsy` value makes this function
      return false. The `confirm:complete` event is fired whether or not the user answered true or false to the dialog.
   */
    allowAction: function(element) {
      var message = element.data('confirm'),
          answer = false, callback;
      if (!message) { return true; }

      if (rails.fire(element, 'confirm')) {
        answer = rails.confirm(message);
        callback = rails.fire(element, 'confirm:complete', [answer]);
      }
      return answer && callback;
    },

    // Helper function which checks for blank inputs in a form that match the specified CSS selector
    blankInputs: function(form, specifiedSelector, nonBlank) {
      var inputs = $(), input, valueToCheck,
          selector = specifiedSelector || 'input,textarea',
          allInputs = form.find(selector);

      allInputs.each(function() {
        input = $(this);
        valueToCheck = input.is(':checkbox,:radio') ? input.is(':checked') : input.val();
        // If nonBlank and valueToCheck are both truthy, or nonBlank and valueToCheck are both falsey
        if (!valueToCheck === !nonBlank) {

          // Don't count unchecked required radio if other radio with same name is checked
          if (input.is(':radio') && allInputs.filter('input:radio:checked[name="' + input.attr('name') + '"]').length) {
            return true; // Skip to next input
          }

          inputs = inputs.add(input);
        }
      });
      return inputs.length ? inputs : false;
    },

    // Helper function which checks for non-blank inputs in a form that match the specified CSS selector
    nonBlankInputs: function(form, specifiedSelector) {
      return rails.blankInputs(form, specifiedSelector, true); // true specifies nonBlank
    },

    // Helper function, needed to provide consistent behavior in IE
    stopEverything: function(e) {
      $(e.target).trigger('ujs:everythingStopped');
      e.stopImmediatePropagation();
      return false;
    },

    // find all the submit events directly bound to the form and
    // manually invoke them. If anyone returns false then stop the loop
    callFormSubmitBindings: function(form, event) {
      var events = form.data('events'), continuePropagation = true;
      if (events !== undefined && events['submit'] !== undefined) {
        $.each(events['submit'], function(i, obj){
          if (typeof obj.handler === 'function') return continuePropagation = obj.handler(event);
        });
      }
      return continuePropagation;
    },

    //  replace element's html with the 'data-disable-with' after storing original html
    //  and prevent clicking on it
    disableElement: function(element) {
      element.data('ujs:enable-with', element.html()); // store enabled state
      element.html(element.data('disable-with')); // set to disabled state
      element.bind('click.railsDisable', function(e) { // prevent further clicking
        return rails.stopEverything(e);
      });
    },

    // restore element to its original state which was disabled by 'disableElement' above
    enableElement: function(element) {
      if (element.data('ujs:enable-with') !== undefined) {
        element.html(element.data('ujs:enable-with')); // set to old enabled state
        // this should be element.removeData('ujs:enable-with')
        // but, there is currently a bug in jquery which makes hyphenated data attributes not get removed
        element.data('ujs:enable-with', false); // clean up cache
      }
      element.unbind('click.railsDisable'); // enable element
    }

  };

  if (rails.fire($(document), 'rails:attachBindings')) {

    $.ajaxPrefilter(function(options, originalOptions, xhr){ if ( !options.crossDomain ) { rails.CSRFProtection(xhr); }});

    $(document).delegate(rails.linkDisableSelector, 'ajax:complete', function() {
        rails.enableElement($(this));
    });

    $(document).delegate(rails.linkClickSelector, 'click.rails', function(e) {
      var link = $(this), method = link.data('method'), data = link.data('params');
      if (!rails.allowAction(link)) return rails.stopEverything(e);

      if (link.is(rails.linkDisableSelector)) rails.disableElement(link);

      if (link.data('remote') !== undefined) {
        if ( (e.metaKey || e.ctrlKey) && (!method || method === 'GET') && !data ) { return true; }

        var handleRemote = rails.handleRemote(link);
        // response from rails.handleRemote() will either be false or a deferred object promise.
        if (handleRemote === false) {
          rails.enableElement(link);
        } else {
          handleRemote.error( function() { rails.enableElement(link); } );
        }
        return false;

      } else if (link.data('method')) {
        rails.handleMethod(link);
        return false;
      }
    });

    $(document).delegate(rails.inputChangeSelector, 'change.rails', function(e) {
      var link = $(this);
      if (!rails.allowAction(link)) return rails.stopEverything(e);

      rails.handleRemote(link);
      return false;
    });

    $(document).delegate(rails.formSubmitSelector, 'submit.rails', function(e) {
      var form = $(this),
        remote = form.data('remote') !== undefined,
        blankRequiredInputs = rails.blankInputs(form, rails.requiredInputSelector),
        nonBlankFileInputs = rails.nonBlankInputs(form, rails.fileInputSelector);

      if (!rails.allowAction(form)) return rails.stopEverything(e);

      // skip other logic when required values are missing or file upload is present
      if (blankRequiredInputs && form.attr("novalidate") == undefined && rails.fire(form, 'ajax:aborted:required', [blankRequiredInputs])) {
        return rails.stopEverything(e);
      }

      if (remote) {
        if (nonBlankFileInputs) {
          // slight timeout so that the submit button gets properly serialized
          // (make it easy for event handler to serialize form without disabled values)
          setTimeout(function(){ rails.disableFormElements(form); }, 13);
          var aborted = rails.fire(form, 'ajax:aborted:file', [nonBlankFileInputs]);

          // re-enable form elements if event bindings return false (canceling normal form submission)
          if (!aborted) { setTimeout(function(){ rails.enableFormElements(form); }, 13); }

          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)
      csrf_token = $('meta[name=csrf-token]').attr('content');
      csrf_param = $('meta[name=csrf-param]').attr('content');
      $('form input[name="' + csrf_param + '"]').val(csrf_token);
    });
  }

})( jQuery );