silverstripe-framework/javascript/Validator.js

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JavaScript
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var _CURRENT_FORM;
function initialiseForm(form, fromAnOnBlur) {
_CURRENT_FORM = form;
if(fromAnOnBlur) {
limitValidationErrorsTo(fromAnOnBlur);
} else {
clearValidationErrorLimit();
}
_HAS_HAD_FORM_ERROR = false;
clearValidationErrorCache();
}
function hasHadFormError() {
return _HAS_HAD_FORM_ERROR || !_ERROR_CACHE;
}
/**
* Returns group with the correct classname
*/
function findIndexOf(group,index) {
var i;
for(i = 0; i < group.length; i++) {
if(group[i].className.indexOf(index) > -1) {
return group[i];
}
}
return null;
}
function clearErrorMessage(holderDiv){
//merged by nlou 23/08/2007, r#40674
if(holderDiv.tagName == 'TD'){//for tablefield.
$$('span.message', holderDiv).each(function(el){
Element.hide(el);
}
);
}else{
$$('span.message', holderDiv.parentNode).each(function(el) {
Element.hide(el);
});
}
}
function clearAllErrorMessages() {
$$('span.message').each(function(el) {
Element.hide(el);
});
}
function require(fieldName,cachedError) {
el = _CURRENT_FORM.elements[fieldName];
// see if the field is an optionset
if(el == null) {
var descendants = _CURRENT_FORM.getElementsByTagName('*');
el = $(fieldName);
if(el == null)
return true;
if(Element.hasClassName(el, 'optionset')) {
el.type = 'optionset';
var options = el.getElementsByTagName('input');
for(var i = 0; i < options.length; i++) {
if(options[i].checked)
if(el.value != null)
el.value += ',' + options[i].value;
else
el.value = options[i].value;
}
}
}
if(el != null) {
// Sets up radio and checkbox validation
if(el.type == 'checkbox' || el.type == 'radio') {
var set = el.checked;
}//merged by nlou 23/08/2007, r#40674
else if(el.type == 'select-one'){
if(el.value == ''||el.value == '0'){
var set = '';
}else{
var set = el.value;
}
}else{
var set = el.value;
}
var baseEl;
// Sometimes require events are triggered of
// associative elements like labels ;-p
if(el.type) {
if(el.parentNode.className.indexOf('form') != -1) set = true;
baseEl = el;
} else {
if(_CURRENT_FORM.elements[fieldName]) {
//Some elements are nested and need to be "got"
var i, hasValue = false;
if(_CURRENT_FORM.elements[fieldName].length > 1) {
for(i=0; i < el.length; i++) {
if(el[i].checked && el[i].value) {
hasValue = true;
break;
}
}
if(hasValue) set = true;
else set = "";
baseEl = el[0].parentNode.parentNode;
} else {
set = "";
baseEl = el.parentNode;
}
} else {
set = true;
}
}
// This checks to see if the input has a value, and the field is not a readonly.
if((typeof set == 'undefined' || set == "")) {
//fieldgroup validation
var fieldLabel = findParentLabel(baseEl);
// Some fields do-not have labels, in
// which case we need a blank one
if(fieldLabel == null || fieldLabel == "") {
fieldlabel = "this field";
}
var errorMessage = "Please fill out \"$FieldLabel\", it is required."
if(baseEl.requiredErrorMsg) errorMessage = baseEl.requiredErrorMsg;
else if(_CURRENT_FORM.requiredErrorMsg) errorMessage = _CURRENT_FORM.requiredErrorMsg;
validationError(baseEl, errorMessage.replace('$FieldLabel', fieldLabel),"required",cachedError);
return false;
} else {
if(!hasHadFormError()) {
clearErrorMessage(baseEl.parentNode);
}
return true;
}
}
return true;
}
/**
* Returns the label of the blockset which contains the classname left
*/
function findParentLabel(el) {
// If the el's type is HTML then were at the uppermost parent, so return
// null. its handled by the validator function anyway :-)
if(el) {
if(el.className == "undefined") {
return null;
} else {
if(el.className) {
if(el.className.indexOf('field') == 0) {
labels = el.getElementsByTagName('label');
if(labels){
var left = findIndexOf(labels,'left');
var right = findIndexOf(labels,'right');
if(left) {
return strip_tags(left.innerHTML);
} else if(right) {
return strip_tags(right.innerHTML);
} else {
return findParentLabel(el.parentNode);
}
}
}//merged by nlou 23/08/2007, r#40674
else if(el.className.indexOf('tablecolumn') != -1){
return el.className.substring(0, el.className.indexOf('tablecolumn')-1);
}else{
return findParentLabel(el.parentNode);
}
} else {
return findParentLabel(el.parentNode);
}
}
}
// backup
return "this";
}
/**
* Adds a validation error to an element
*/
function validationError(field,message, messageClass, cacheError) {
if(typeof(field) == 'string') {
field = $(field);
}
if(cacheError) {
_ERROR_CACHE[_ERROR_CACHE.length] = {
"field": field,
"message": message,
"messageClass": messageClass
}
return;
}
// The validation function should only be called if you've just left a field,
// or the field is being validated on final submission
if(_LIMIT_VALIDATION_ERRORS && _LIMIT_VALIDATION_ERRORS != field) {
// clearErrorMessage(field.parentNode);
return;
}
_HAS_HAD_FORM_ERROR = true;
// See if the tag has a reference to the validationMessage (quicker than the one below)
var validationMessage = field.validationMessage;
// Cycle through the elements to see if it has a span
// (for a validation or required messages)
if(!validationMessage) {
//Get the parent holder of the element
var FieldHolder = field.parentNode;
var allSpans = FieldHolder.getElementsByTagName('span');
validationMessage = findIndexOf(allSpans,'message');
}
// If we didn't find it, create it
if(!validationMessage) {
validationMessage = document.createElement('span');
FieldHolder.appendChild(validationMessage);
}
// Keep a reference to it
field.validationMessage = validationMessage;
// Set the attributes
validationMessage.className = "message " + messageClass;
validationMessage.innerHTML = message;
validationMessage.style.display = "block";
}
/**
* Set a limitation so that only validation errors for the given element will actually be shown
*/
var _LIMIT_VALIDATION_ERRORS = null;
function limitValidationErrorsTo(field) {
_LIMIT_VALIDATION_ERRORS = field;
}
function clearValidationErrorLimit() {
_LIMIT_VALIDATION_ERRORS = null;
}
function clearValidationErrorCache() {
_ERROR_CACHE = new Array();
}
function showCachedValidationErrors() {
for(i = 0; i < _ERROR_CACHE.length; i++) {
validationError(_ERROR_CACHE[i]["field"],
_ERROR_CACHE[i]["message"],
_ERROR_CACHE[i]["messageClass"],
false);
}
}
function strip_tags(text) {
return text.replace(/<[^>]+>/g,'');
}