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/**
* Unobtrusive scripting adapter for jQuery
*
* Requires jQuery 1.4.3 or later.
* https://github.com/rails/jquery-ujs
*/
(function($) {
// Triggers an event on an element and returns the event result
function fire(obj, name, data) {
var event = new $.Event(name);
obj.trigger(event, data);
return event.result !== false;
}
// Submits "remote" forms and links with ajax
function handleRemote(element) {
var method, url, data,
dataType = element.attr('data-type') || ($.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 {
method = element.attr('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.attr('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]').each(function() {
var input = $(this);
input.data('ujs:enable-with', input.val())
.val(input.attr('data-disable-with'))
.attr('disabled', 'disabled');
});
}
function enableFormElements(form) {
form.find('input[data-disable-with]').each(function() {
var input = $(this);
input.val(input.data('ujs:enable-with')).removeAttr('disabled');
});
}
function allowAction(element) {
var message = element.attr('data-confirm');
return !message || (fire(element, 'confirm') && confirm(message));
}
function requiredValuesMissing(form) {
var missing = false;
form.find('input[name][required]').each(function() {
if (!$(this).val()) missing = true;
});
return missing;
}
$('a[data-confirm], a[data-method], a[data-remote]').live('click.rails', function(e) {
var link = $(this);
if (!allowAction(link)) return false;
if (link.attr('data-remote') != undefined) {
handleRemote(link);
return false;
} else if (link.attr('data-method')) {
handleMethod(link);
return false;
}
});
$('form').live('submit.rails', function(e) {
var form = $(this), remote = form.attr('data-remote') != undefined;
if (!allowAction(form)) return false;
// skip other logic when required values are missing
if (requiredValuesMissing(form)) return !remote;
if (remote) {
handleRemote(form);
return false;
} else {
disableFormElements(form);
}
});
$('form input[type=submit], 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 );
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