text: /**
   * Unobtrusive scripting adapter for jQuery
   *
   * Requires jQuery 1.4.3 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, when this rails.js adapter submits remote forms,
   * any file input fields are excluded from the request parameters sent to the server. You may cancel the whole form submission by 
   * binding a handler function that returns false to the `ajax:aborted:file` hook.
   *
   * Ex:
   *     $('form').live('ajax:aborted:file', function(){
   *       alert("File detected. Form submission canceled.");
   *       return false;
   *     });
   *
   * The `ajax:aborted:file` event is fired when a form is submitted and both conditions are met:
   *   a) file-type input field is detected, and
   *   b) the value of the input:file field is not blank. 
   * 
   * 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.
   *
   * Similarly, rails.js aborts AJAX form submissions if any non-blank input[required] fields are detected, providing the `ajax:aborted:required` hook.
   * Unlike file uploads, however, blank required input fields cancel the whole form submission by default.
   */
  
  (function($) {
  	// Make sure that every Ajax request sends the CSRF token
  	function CSRFProtection(xhr) {
  		var token = $('meta[name="csrf-token"]').attr('content');
  		if (token) xhr.setRequestHeader('X-CSRF-Token', token);
  	}
  	if ('ajaxPrefilter' in $) $.ajaxPrefilter(function(options, originalOptions, xhr){ CSRFProtection(xhr) });
  	else $(document).ajaxSend(function(e, xhr){ CSRFProtection(xhr) });
  
  	// Triggers an event on an element and returns the event result
  	function fire(obj, name, data) {
  		var event = $.Event(name);
  		obj.trigger(event, data);
  		return event.result !== false;
  	}
  
  	// Submits "remote" forms and links with ajax
  	function handleRemote(element) {
  		var method, url, data,
  			dataType = element.data('type') || ($.ajaxSettings && $.ajaxSettings.dataType);
  
  	if (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 {
  			method = element.data('method');
  			url = element.attr('href');
  			data = null;
  		}
  			$.ajax({
  				url: url, 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 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]);
  				}
  			});
  		}
  	}
  
  	// Handles "data-method" on links such as:
  	// <a href="/users/5" data-method="delete" rel="nofollow" data-confirm="Are you sure?">Delete</a>
  	function handleMethod(link) {
  		var href = link.attr('href'),
  			method = link.data('method'),
  			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" />';
  		}
  
  		form.hide().append(metadata_input).appendTo('body');
  		form.submit();
  	}
  
  	function disableFormElements(form) {
  		form.find('input[data-disable-with], button[data-disable-with]').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.attr('disabled', 'disabled');
  		});
  	}
  
  	function enableFormElements(form) {
  		form.find('input[data-disable-with]:disabled, button[data-disable-with]:disabled').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.removeAttr('disabled');
  		});
  	}
  
  	function allowAction(element) {
  		var message = element.data('confirm');
  		return !message || (fire(element, 'confirm') && confirm(message));
  	}
  
  	function blankInputs(form, specifiedSelector) {
  		var blankExists = false,
  				selector = specifiedSelector || 'input';
  		form.find(selector).each(function() {
  			if (!$(this).val()) blankExists = true;
  		});
  		return blankExists;
  	}
  	
  	function nonBlankInputs(form, specifiedSelector) {
  		var nonBlankExists = false,
  				selector = specifiedSelector || 'input';
  		form.find(selector).each(function() {
  			if ($(this).val()) nonBlankExists = true;
  		});
  		return nonBlankExists;
  	}
  
  	$('a[data-confirm], a[data-method], a[data-remote]').live('click.rails', function(e) {
  		var link = $(this);
  		if (!allowAction(link)) return false;
  
  		if (link.data('remote') != undefined) {
  			handleRemote(link);
  			return false;
  		} else if (link.data('method')) {
  			handleMethod(link);
  			return false;
  		}
  	});
  
  	$('form').live('submit.rails', function(e) {
  		var form = $(this), remote = form.data('remote') != undefined;
  		if (!allowAction(form)) return false;
  
  		// skip other logic when required values are missing or file upload is present
  		if (blankInputs(form, 'input[name][required]')) {
  			form.trigger('ajax:aborted:required');
  			return !remote;
  		}
  		if (nonBlankInputs(form, 'input:file')) {
  			return fire(form, 'ajax:aborted:file');
  		}
  
  		if (remote) {
  			handleRemote(form);
  			return false;
  		} else {
  			// slight timeout so that the submit button gets properly serialized
  			setTimeout(function(){ disableFormElements(form) }, 13);
  		}
  	});
  
  	$('form input[type=submit], form input[type=image], form button[type=submit], form button:not([type])').live('click.rails', function() {
  		var button = $(this);
  		if (!allowAction(button)) return false;
  		// 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);
  	});
  
  	$('form').live('ajax:beforeSend.rails', function(event) {
  		if (this == event.target) disableFormElements($(this));
  	});
  
  	$('form').live('ajax:complete.rails', function(event) {
  		if (this == event.target) enableFormElements($(this));
  	});
  })( jQuery );
  