META-INF.resources.oam.custom.inputHtml.kupubeforeunload.js Maven / Gradle / Ivy

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JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.0 features. A JSF2.0 implementation is required to use this version of the Tomahawk library.
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/* BeforeUnload form processing */
if (!window.beforeunload) (function() {
    var BeforeUnloadHandler = function() {
        var self = this;

        this.message = "Discard changes? If you click OK, any changes you have made will be lost.";
        if (window._) {
            this.message = _("Discard changes? If you click OK, any changes you have made will be lost.");
        };
        this.forms = [];
        this.chkId = [];
        this.chkType = new this.CheckType();
        this.handlers = [this.isAnyFormChanged];
        this.submitting = false;

        this.execute = function(event) {
            if (self.submitting) return;
            if (!event) event = window.event;

            for (var i = 0; i < self.handlers.length; i++) {
                var fn = self.handlers[i];
                var message = message || fn.apply(self);
            }
            if (message===true) message = self.message;
            if (message===false) message = undefined;
            if (event && message) event.returnValue = message;
            return message;
        };
        this.execute.tool = this;
    };
    var Class = BeforeUnloadHandler.prototype;

    // form checking code
    Class.isAnyFormChanged = function() {
        for (var i=0; i < this.forms.length; i++) {
            var form = this.forms[i];
            if (this.isElementChanged(form)) {
                return true;
            }
        }
        return false;
    };
    Class.addHandler = function(fn) {
        this.handlers.push(fn);
    };
    Class.onsubmit = function() {
        var tool = window.onbeforeunload && window.onbeforeunload.tool;
        tool.submitting = true;
    };
    Class.addForm = function(form) {
        for (var i = 0; i < this.forms.length; i++) {
            if (this.forms[i]==form) return;
        }
        this.forms.push(form);
        form.onsubmit = this.onsubmit;
        var elements = form.getElementsByTagName('input');
        for (var j = 0; j < elements.length; j++) {
            var ele = elements[j];
            if (ele.type=='hidden') {
                ele.setAttribute('originalValue', ele.defaultValue);
            }
        }
    };
    Class.addForms = function() {
        for (var i = 0; i < arguments.length; i++) {
            var element = arguments[i];
            if (!element) continue;
            if (element.tagName=='FORM') {
                this.addForm(element);
            }
            else {
                var forms = element.getElementsByTagName('form');
                for (var j = 0; j < forms.length; j++) {
                    this.addForm(forms[j]);
                }
            }
        }
    };
    Class.removeForms = function() {
        for (var i = 0; i < arguments.length; i++) {
            var element = arguments[i];
            if (!element) continue;
            if (element.tagName=='FORM') {
                for (var j = 0; j < arguments.length; j++) {
                    if (this.forms[j] == element) {
                        this.forms.splice(j--, 1);
                        element.onsubmit=null;
                    }
                }
            } else {
                var forms = element.getElementsByTagName('form');
                for (var j = 0; j < forms.length; j++) {
                    this.removeForms(forms[j]);
                }
            }
        }
    };

    Class.CheckType = function() {};
    var c = Class.CheckType.prototype;
    c.checkbox = c.radio = function(ele) {
        return ele.checked != ele.defaultChecked;
    };
    c.password = c.textarea = c.text = function(ele) {
        return ele.value != ele.defaultValue;
    };
    // hidden: cannot tell on Mozilla without special treatment
    c.hidden = function(ele) {
        var orig = ele.getAttribute("originalValue");
        return orig && (ele.value != orig);
    };

    c['select-one'] = function(ele) {
        for (var i=0 ; i < ele.length; i++) {
            var opt = ele.options[i];
            if ( opt.selected != opt.defaultSelected) {
                if (i===0 && opt.selected) continue; /* maybe no default */
                return true;
            }
        }
        return false;
    };

    c['select-multiple'] = function(ele) {
        for (var i=0 ; i < ele.length; i++) {
            var opt = ele.options[i];
            if ( opt.selected != opt.defaultSelected) {
                return true;
            }
        }
        return false;
    };

    Class.chk_form = function(form) {
        var elements = form.elements;
        for (var i=0; i < elements.length; i++ ) {
            var element = elements[i];
            if (this.isElementChanged(element)) {
                return true;
            }
        }
        return false;
    };

    Class.isElementChanged = function(ele) {
        var method = (ele.id && this.chkId.hasOwnProperty(ele.id))?this.chkId[ele.id]:null;
        if (!method && ele.type && ele.name) {
            method = this.chkType[ele.type];
        }
        if (!method && ele.tagName) {
            method = this['chk_'+ele.tagName.toLowerCase()];
        }

        return method? method.apply(this, [ele]) : false;
    };

    window.onbeforeunload = new BeforeUnloadHandler().execute;
})();