Live Form Validation for Nette 2.0

live-form-validation.js

/**
 * Live Form Validation for Nette 2.0
 *
 * @author Radek Ježdík, MartyIX, David Grudl
 */

var LiveForm = {
        options: {
                controlErrorClass: 'form-control-error',            // CSS class for an invalid control
                errorMessageClass: 'form-error-message',            // CSS class for an error message
                validMessageClass: 'form-valid-message',            // CSS class for a valid message
                noLiveValidation: 'no-live-validation',             // CSS class for a valid message
                showValid: false,                                   // show message when valid
                dontShowWhenValidClass: 'dont-show-when-valid',     // control with this CSS class will not show valid message
                messageTag: 'span',                                 // tag that will hold the error/valid message
                messageIdPostfix: '_message',                       // message element id = control id + this postfix
                wait: 300                                           // delay in ms before validating on keyup/keydown
        },

        forms: { }
};

/**
 * Handlers for all the events that trigger validation
 * YOU CAN CHANGE these handlers (ie. to use jQuery events instead)
 */
LiveForm.setUpHandlers = function(el) {
        if (this.hasClass(el, this.options.noLiveValidation)) return;

        var handler = function(event) {
                event = event || window.event;
                Nette.validateControl(event.target ? event.target : event.srcElement);
        };

        var self = this;

        el.onchange = handler;
        el.onblur = handler;
        el.onkeydown = function (event) {
                if (self.options.wait >= 200) {
                        // Hide validation span tag.
                        self.removeClass(this, self.options.controlErrorClass);
                        self.removeClass(this, self.options.validMessageClass);
                        
                        var error = self.getMessageElement(this);
                        error.innerHTML = '';
                        error.className = '';
                        
                        // Cancel timeout to run validation handler
                        if (self.timeout) {
                                clearTimeout(self.timeout);
                        }
                }
        };
        el.onkeyup = function(event) {
                event = event || window.event;
                if (event.keyCode !== 9) {
                        if (self.timeout) clearTimeout(self.timeout);
                                self.timeout = setTimeout(function() {
                                handler(event);
                        }, self.options.wait);
                }
        };
}

LiveForm.addError = function(el, message) {
        this.forms[el.form.id].hasError = true;
        this.addClass(el, this.options.controlErrorClass);

        if (!message) {
                message = ' ';
        }

        var error = this.getMessageElement(el);
        error.innerHTML = message;
}

LiveForm.removeError = function(el) {
        this.removeClass(el, this.options.controlErrorClass);
        var err_el = document.getElementById(el.id + this.options.messageIdPostfix);

        if (this.options.showValid && this.showValid(el)) {
                err_el = this.getMessageElement(el);
                err_el.className = this.options.validMessageClass;
                return;
        }

        if (err_el) {
                err_el.parentNode.removeChild(err_el);
        }
}

LiveForm.showValid = function(el) {
        if(el.type) {
                var type = el.type.toLowerCase();
                if(type == 'checkbox' || type == 'radio') {
                        return false;
                }
        }
        
        var rules = Nette.getRules(null, el);
        if(rules.length == 0) {
                return false;
        }

        if (this.hasClass(el, this.options.dontShowWhenValidClass)) {
                return false;
        }

        return true;
}

LiveForm.getMessageElement = function(el) {
        var id = el.id + this.options.messageIdPostfix;
        var error = document.getElementById(id);

        if (!error) {
                error = document.createElement(this.options.messageTag);
                error.id = id;
                el.parentNode.appendChild(error);
        }

        if (el.style.display == 'none') {
                error.style.display = 'none';
        }

        error.className = this.options.errorMessageClass;
        error.innerHTML = '';
        
        return error;
}

LiveForm.addClass = function(el, className) {
        if (!el.className) {
                el.className = className;
        } else if (!this.hasClass(el, className)) {
                el.className += ' ' + className;
        }
}

LiveForm.hasClass = function(el, className) {
        if (el.className)
                return el.className.match(new RegExp('(\\s|^)' + className + '(\\s|$)'));
        return false;
}

LiveForm.removeClass = function(el, className) {
        if (this.hasClass(el, className)) {
                var reg = new RegExp('(\\s|^)'+ className + '(\\s|$)');
                var m = el.className.match(reg);
                el.className = el.className.replace(reg, (m[1] == ' ' && m[2] == ' ') ? ' ' : '');
        }
}

///////////////////////////////////////////////////////////////////////////////////////////

var Nette = Nette || { };

Nette.addEvent = function (element, on, callback) {
        var original = element['on' + on];
        element['on' + on] = function () {
                if (typeof original === 'function' && original.apply(element, arguments) === false) {
                        return false;
                }
                return callback.apply(element, arguments);
        };
};


Nette.getValue = function(elem) {
        var i, len;
        if (!elem) {
                return null;

        } else if (!elem.nodeName) { // radio
                for (i = 0, len = elem.length; i < len; i++) {
                        if (elem[i].checked) {
                                return elem[i].value;
                        }
                }
                return null;

        } else if (elem.nodeName.toLowerCase() === 'select') {
                var index = elem.selectedIndex, options = elem.options;

                if (index < 0) {
                        return null;

                } else if (elem.type === 'select-one') {
                        return options[index].value;
                }

                for (i = 0, values = [], len = options.length; i < len; i++) {
                        if (options[i].selected) {
                                values.push(options[i].value);
                        }
                }
                return values;

        } else if (elem.type === 'checkbox') {
                return elem.checked;

        } else if (elem.type === 'radio') {
                return Nette.getValue(elem.form.elements[elem.name].nodeName ? [elem] : elem.form.elements[elem.name]);

        } else {
                return elem.value.replace(/^\s+|\s+$/g, '');
        }
};


Nette.validateControl = function(elem, rules, onlyCheck) {
        rules = Nette.getRules(rules, elem);
        for (var id in rules) {
                var rule = rules[id], op = rule.op.match(/(~)?([^?]+)/);
                rule.neg = op[1];
                rule.op = op[2];
                rule.condition = !!rule.rules;
                var el = rule.control ? elem.form.elements[rule.control] : elem;

                var success = Nette.validateRule(el, rule.op, rule.arg);
                if (success === null) continue;
                if (rule.neg) success = !success;

                if (rule.condition && success) {
                        if (!Nette.validateControl(elem, rule.rules, onlyCheck)) {
                                return false;
                        }
                } else if (!rule.condition && !success) {
                        if (el.disabled) continue;
                        if (!onlyCheck) {
                                Nette.addError(el, rule.msg.replace('%value', Nette.getValue(el)));
                        }
                        return false;
                }
        }
        if (!onlyCheck) {
                LiveForm.removeError(elem);
        }
        return true;
};


Nette.getRules = function(rules, elem) {
        return rules || eval('[' + (elem.getAttribute('data-nette-rules') || '') + ']')
};


Nette.validateForm = function(sender) {
        var form = sender.form || sender;
        LiveForm.forms[form.id].hasError = false;

        if (form['nette-submittedBy'] && form['nette-submittedBy'].getAttribute('formnovalidate') !== null) {
                return true;
        }
        var ok = true;
        for (var i = 0; i < form.elements.length; i++) {
                var elem = form.elements[i];
                if (!(elem.nodeName.toLowerCase() in {
                        input:1,
                        select:1,
                        textarea:1
                }) || (elem.type in {
                        hidden:1,
                        submit:1,
                        image:1,
                        reset: 1
                }) || elem.disabled || elem.readonly) {
                        continue;
                }
                if (!Nette.validateControl(elem)) {
                        ok = false;
                }
        }
        return ok;
};


Nette.addError = function(elem, message) {
        if (elem.focus && !LiveForm.forms[elem.form.id].hasError) {
                elem.focus();
        }
        LiveForm.addError(elem, message);
};


Nette.validateRule = function(elem, op, arg) {
        var val = Nette.getValue(elem);

        if (elem.getAttribute) {
                if (val === elem.getAttribute('data-nette-empty-value')) {
                        val = '';
                }
        }

        if (op.charAt(0) === ':') {
                op = op.substr(1);
        }
        op = op.replace('::', '_');
        op = op.replace(/\\/g,'');
        return Nette.validators[op] ? Nette.validators[op](elem, arg, val) : null;
};


Nette.validators = {
        filled: function(elem, arg, val) {
                return val !== '' && val !== false && val !== null;
        },

        valid: function(elem, arg, val) {
                return Nette.validateControl(elem, null, true);
        },

        equal: function(elem, arg, val) {
                if (arg === undefined) {
                        return null;
                }
                arg = Nette.isArray(arg) ? arg : [arg];
                for (var i = 0, len = arg.length; i < len; i++) {
                        if (val == (arg[i].control ? Nette.getValue(elem.form.elements[arg[i].control]) : arg[i])) {
                                return true;
                        }
                }
                return false;
        },

        minLength: function(elem, arg, val) {
                return val.length >= arg;
        },

        maxLength: function(elem, arg, val) {
                return val.length <= arg;
        },

        length: function(elem, arg, val) {
                arg = Nette.isArray(arg) ? arg : [arg, arg];
                return (arg[0] === null || val.length >= arg[0]) && (arg[1] === null || val.length <= arg[1]);
        },

        email: function(elem, arg, val) {
                return (/^("([ !\x23-\x5B\x5D-\x7E]*|\\[ -~])+"|[-a-z0-9!#$%&'*+/=?^_`{|}~]+(\.[-a-z0-9!#$%&'*+/=?^_`{|}~]+)*)@([0-9a-z\u00C0-\u02FF\u0370-\u1EFF]([-0-9a-z\u00C0-\u02FF\u0370-\u1EFF]{0,61}[0-9a-z\u00C0-\u02FF\u0370-\u1EFF])?\.)+[a-z\u00C0-\u02FF\u0370-\u1EFF][-0-9a-z\u00C0-\u02FF\u0370-\u1EFF]{0,17}[a-z\u00C0-\u02FF\u0370-\u1EFF]$/i).test(val);
        },

        url: function(elem, arg, val) {
                return (/^(https?:\/\/|(?=.*\.))([0-9a-z\u00C0-\u02FF\u0370-\u1EFF](([-0-9a-z\u00C0-\u02FF\u0370-\u1EFF]{0,61}[0-9a-z\u00C0-\u02FF\u0370-\u1EFF])?\.)*[a-z\u00C0-\u02FF\u0370-\u1EFF][-0-9a-z\u00C0-\u02FF\u0370-\u1EFF]{0,17}[a-z\u00C0-\u02FF\u0370-\u1EFF]|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})(:\d{1,5})?(\/\S*)?$/i).test(val);
        },

        regexp: function(elem, arg, val) {
                var parts = typeof arg === 'string' ? arg.match(/^\/(.*)\/([imu]*)$/) : false;
                if (parts) {
                        try {
                                return (new RegExp(parts[1], parts[2].replace('u', ''))).test(val);
                        } catch (e) {}
                }
        },

        pattern: function(elem, arg, val) {
                try {
                        return typeof arg === 'string' ? (new RegExp('^(' + arg + ')$')).test(val) : null;
                } catch (e) {}
        },

        integer: function(elem, arg, val) {
                return (/^-?[0-9]+$/).test(val);
        },

        'float': function(elem, arg, val) {
                return (/^-?[0-9]*[.,]?[0-9]+$/).test(val);
        },

        range: function(elem, arg, val) {
                return Nette.isArray(arg) ? ((arg[0] === null || parseFloat(val) >= arg[0]) && (arg[1] === null || parseFloat(val) <= arg[1])) : null;
        },

        submitted: function(elem, arg, val) {
                return elem.form['nette-submittedBy'] === elem;
        }
};


Nette.toggleForm = function(form) {
        for (var i = 0; i < form.elements.length; i++) {
                if (form.elements[i].nodeName.toLowerCase() in {
                        input:1,
                        select:1,
                        textarea:1,
                        button:1
                }) {
                        Nette.toggleControl(form.elements[i]);
                }
        }
};


Nette.toggleControl = function(elem, rules, firsttime) {
        rules = Nette.getRules(rules, elem);
        var has = false, __hasProp = Object.prototype.hasOwnProperty, handler = function() {
                Nette.toggleForm(elem.form);
        };

        for (var id in rules) {
                var rule = rules[id], op = rule.op.match(/(~)?([^?]+)/);
                rule.neg = op[1];
                rule.op = op[2];
                rule.condition = !!rule.rules;
                if (!rule.condition) continue;

                var el = rule.control ? elem.form.elements[rule.control] : elem;
                var success = Nette.validateRule(el, rule.op, rule.arg);
                if (success === null) continue;
                if (rule.neg) success = !success;

                if (Nette.toggleControl(elem, rule.rules, firsttime) || rule.toggle) {
                        has = true;
                        if (firsttime) {
                                if (!el.nodeName) { // radio
                                        for (var i = 0; i < el.length; i++) {
                                                Nette.addEvent(el[i], 'click', handler);
                                        }
                                } else if (el.nodeName.toLowerCase() === 'select') {
                                        Nette.addEvent(el, 'change', handler);
                                } else {
                                        Nette.addEvent(el, 'click', handler);
                                }
                        }
                        for (var id2 in rule.toggle || []) {
                                if (__hasProp.call(rule.toggle, id2)) {
                                        Nette.toggle(id2, success ? rule.toggle[id2] : !rule.toggle[id2]);
                                }
                        }
                }
        }
        return has;
};


Nette.toggle = function(id, visible) {
        var elem = document.getElementById(id);
        if (elem) {
                elem.style.display = visible ? "" : "none";
        }
};


Nette.initForm = function(form) {
        form.noValidate = 'novalidate';

        LiveForm.forms[form.id] = {
                hasError: false
        };

        Nette.addEvent(form, 'submit', function() {
                return Nette.validateForm(form);
        });

        Nette.addEvent(form, 'click', function(e) {
                e = e || event;
                var target = e.target || e.srcElement;
                form['nette-submittedBy'] = (target.type in {
                        submit:1,
                        image:1
                }) ? target : null;
        });

        for (var i = 0; i < form.elements.length; i++) {
                Nette.toggleControl(form.elements[i], null, true);
                LiveForm.setUpHandlers(form.elements[i]);
        }

        if (/MSIE/.exec(navigator.userAgent)) {
                var labels = {},
                wheelHandler = function() {
                        return false;
                },
                clickHandler = function() {
                        document.getElementById(this.htmlFor).focus();
                        return false;
                };

                for (i = 0, elms = form.getElementsByTagName('label'); i < elms.length; i++) {
                        labels[elms[i].htmlFor] = elms[i];
                }

                for (i = 0, elms = form.getElementsByTagName('select'); i < elms.length; i++) {
                        Nette.addEvent(elms[i], 'mousewheel', wheelHandler); // prevents accidental change in IE
                        if (labels[elms[i].htmlId]) {
                                Nette.addEvent(labels[elms[i].htmlId], 'click', clickHandler); // prevents deselect in IE 5 - 6
                        }
                }
        }
};


Nette.isArray = function(arg) {
        return Object.prototype.toString.call(arg) === '[object Array]';
};


Nette.addEvent(window, 'load', function () {
        for (var i = 0; i < document.forms.length; i++) {
                Nette.initForm(document.forms[i]);
        }
});

Potvrzuji nefunčnost "toggle".

Nefunkční toggle je dán zřejmě přenastavením onchange metody při validaci. Nejdříve se jako onchange handler pro select nastaví toggle a potom se přepíše na validaci. Podle mě stačí řádek 37 nahradit tímto: Nette.addEvent(el, 'change', handler); Samozřejmě by se mělo nahradit i ostatní nastavování handlerů.

Ahoj, při použití minifikátoru JavaScriptPacker vznikl problém u funkcí, které nebyly zakončeny středníkem. Konkrétně mezi řádky 27-153. Viz můj fork.

Jak se Vám chová validace formuláře v IE 10 ? Kliknutím na submit u se mě form pokaždé refreshne a přidá chyby na začátek formu.. ovšem kliknutím na např. povinný input a následně jinam, vyskočí hláška vedle inputu správně.

Ve FF je to ok.

Přidám řešení problémů, na které jsem narazil:

• V IE8 funkce getAttribute pro neexistující atribut vrací prázdný řetězec a ne null, takže na řádku 253 je potřeba upravit podmínku, jinak se formulář odešle bez validace (nette/nette@30ac03a).
• IE < 9 špatně zachází s events ve funkci setTimeout, takže dochází k chybě member not found v handleru onkeyup.

//za řádek 58 (http://stackoverflow.com/questions/3531751/member-not-found-ie-error-ie-6-7-8-9)
var eventCopy = {};
for (var i in event) {
    eventCopy[i] = event[i];
}

//vyměnit původní self.timeout za tento (event je změněn za eventCopy)
self.timeout = setTimeout(function() {
    handler(eventCopy);
}, self.options.wait);

• Pokud používáte k vykreslování formulářů bootstrap-renderer, tak se hodí využít označení celého chybného ,,řádku" s labelem, inputem a chybovou zprávou. Lze toho docílit přidáním:

//za řádek 75 (funkce LiveForm.addError)
if (document.getElementById(el.id + '-pair') !== null)
        this.addClass(document.getElementById(el.id + '-pair'), 'error');

//za řádek 90 (funkce LiveForm.removeError)
if (document.getElementById(el.id + '-pair') !== null)
        this.removeClass(document.getElementById(el.id + '-pair'), 'error');

//řádek 120 - obecnější vkládání chybové zprávy (řeší problém se skrytou zprávou u datepickeru)
//el.parentNode.appendChild(error);
var blockControl = document.getElementById(el.id + '-pair');
if (blockControl) {
    for (var i = 0; i < blockControl.childNodes.length; i++) {
        if (blockControl.childNodes[i].className === "controls") {
            blockControl.childNodes[i].appendChild(error);
            break;
        }
    }
}

Paradni pluginek, akorat zlobi pri pouziti twitter bootstrapu pri pouziti .input-prepend a .input-append. udelal jsem jednoduchy fix

Stary radek 120:

el.parentNode.appendChild(error);

Nahradit za toto:

if (el.parentNode.className.indexOf("input-prepend") != -1 || el.parentNode.className.indexOf("input-append") != -1) {
    el.parentNode.parentNode.appendChild(error);
} else {
    el.parentNode.appendChild(error);
}

Je to spise workaround nez realny fix, kazdopadne pomohl. Budu rad za pripadnou dalsi upravu ;). Jinak diky, fakt dobra prace.

Tak jsem objevil dalsi chybku. S live validation nefunguje toggle. Staci opravit v metode LiveForm.setUpHandlers zpusob, jakymi se ukladaji handlery na radcich 37, 38, 39 a 55 tak, aby se vyuzivalo Nette.addEvent,
Prepsat zminene radky v tomto stylu:
el.onchange = handler;
prepsat na
Nette.addEvent(el, "change", handler);

Toggly pak zacnou fungovat, duvod je, ze se prepisuje toggle event, misto toho aby se pridaval.

Na řádcích 215 a 402 je chyba. Namísto "rules[id]" tam musí být "rules[id][0]". Tedy při použití s Nette > 2.2, nižší verze jsem nezkoušel.