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/*!
* jQuery Plugin: Are-You-Sure (Dirty Form Detection)
* https://github.com/codedance/jquery.AreYouSure/
*
* Copyright (c) 2012-2014, Chris Dance and PaperCut Software http://www.papercut.com/
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Author: chris.dance@papercut.com
* Version: 1.9.0
* Date: 13th August 2014
*/
(function($) {
$.fn.areYouSure = function(options) {
var settings = $.extend(
{
'message' : 'You have unsaved changes!',
'dirtyClass' : 'dirty',
'change' : null,
'silent' : false,
'addRemoveFieldsMarksDirty' : false,
'fieldEvents' : 'change keyup propertychange input',
'fieldSelector': ":input:not(input[type=submit]):not(input[type=button])"
}, options);
var getValue = function($field) {
if ($field.hasClass('ays-ignore')
|| $field.hasClass('aysIgnore')
|| $field.attr('data-ays-ignore')
|| $field.attr('name') === undefined) {
return null;
}
if ($field.is(':disabled')) {
return 'ays-disabled';
}
var val;
var type = $field.attr('type');
if ($field.is('select')) {
type = 'select';
}
switch (type) {
case 'checkbox':
case 'radio':
val = $field.is(':checked');
break;
case 'select':
val = '';
$field.find('option').each(function(o) {
var $option = $(this);
if ($option.is(':selected')) {
val += $option.val();
}
});
break;
default:
val = $field.val();
}
return val;
};
var storeOrigValue = function($field) {
$field.data('ays-orig', getValue($field));
};
var checkForm = function(evt) {
var isFieldDirty = function($field) {
var origValue = $field.data('ays-orig');
if (undefined === origValue) {
return false;
}
return (getValue($field) != origValue);
};
var $form = ($(this).is('form'))
? $(this)
: $(this).parents('form');
// Test on the target first as it's the most likely to be dirty
if (isFieldDirty($(evt.target))) {
setDirtyStatus($form, true);
return;
}
$fields = $form.find(settings.fieldSelector);
if (settings.addRemoveFieldsMarksDirty) {
// Check if field count has changed
var origCount = $form.data("ays-orig-field-count");
if (origCount != $fields.length) {
setDirtyStatus($form, true);
return;
}
}
// Brute force - check each field
var isDirty = false;
$fields.each(function() {
$field = $(this);
if (isFieldDirty($field)) {
isDirty = true;
return false; // break
}
});
setDirtyStatus($form, isDirty);
};
var initForm = function($form) {
var fields = $form.find(settings.fieldSelector);
$(fields).each(function() { storeOrigValue($(this)); });
$(fields).unbind(settings.fieldEvents, checkForm);
$(fields).bind(settings.fieldEvents, checkForm);
$form.data("ays-orig-field-count", $(fields).length);
setDirtyStatus($form, false);
};
var setDirtyStatus = function($form, isDirty) {
var changed = isDirty != $form.hasClass(settings.dirtyClass);
$form.toggleClass(settings.dirtyClass, isDirty);
// Fire change event if required
if (changed) {
if (settings.change) settings.change.call($form, $form);
if (isDirty) $form.trigger('dirty.areYouSure', [$form]);
if (!isDirty) $form.trigger('clean.areYouSure', [$form]);
$form.trigger('change.areYouSure', [$form]);
}
};
var rescan = function() {
var $form = $(this);
var fields = $form.find(settings.fieldSelector);
$(fields).each(function() {
var $field = $(this);
if (!$field.data('ays-orig')) {
storeOrigValue($field);
$field.bind(settings.fieldEvents, checkForm);
}
});
// Check for changes while we're here
$form.trigger('checkform.areYouSure');
};
var reinitialize = function() {
initForm($(this));
}
if (!settings.silent && !window.aysUnloadSet) {
window.aysUnloadSet = true;
$(window).bind('beforeunload', function() {
$dirtyForms = $("form").filter('.' + settings.dirtyClass);
if ($dirtyForms.length == 0) {
return;
}
// Prevent multiple prompts - seen on Chrome and IE
if (navigator.userAgent.toLowerCase().match(/msie|chrome/)) {
if (window.aysHasPrompted) {
return;
}
window.aysHasPrompted = true;
window.setTimeout(function() {window.aysHasPrompted = false;}, 900);
}
return settings.message;
});
}
return this.each(function(elem) {
if (!$(this).is('form')) {
return;
}
var $form = $(this);
$form.submit(function() {
$form.removeClass(settings.dirtyClass);
});
$form.bind('reset', function() { setDirtyStatus($form, false); });
// Add a custom events
$form.bind('rescan.areYouSure', rescan);
$form.bind('reinitialize.areYouSure', reinitialize);
$form.bind('checkform.areYouSure', checkForm);
initForm($form);
});
};
})(jQuery);
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