Annotation of kupu/common/kupubeforeunload.js, revision 1.1
1.1 ! dwinter 1: /* BeforeUnload form processing */
! 2: if (!window.beforeunload) (function() {
! 3: var BeforeUnloadHandler = function() {
! 4: var self = this;
! 5:
! 6: this.message = "Your form has not been saved. All changes you have made will be lost";
! 7: if (window._) {
! 8: this.message = _("Your form has not been saved. All changes you have made will be lost");
! 9: };
! 10: this.forms = [];
! 11: this.chkId = [];
! 12: this.chkType = new this.CheckType();
! 13: this.handlers = [this.isAnyFormChanged];
! 14: this.submitting = false;
! 15:
! 16: this.execute = function(event) {
! 17: if (self.submitting) return;
! 18: if (!event) event = window.event;
! 19:
! 20: for (var i = 0; i < self.handlers.length; i++) {
! 21: var fn = self.handlers[i];
! 22: var message = message || fn.apply(self);
! 23: }
! 24: if (message===true) message = self.message;
! 25: if (message===false) message = undefined;
! 26: if (event) event.returnValue = message;
! 27: return message;
! 28: }
! 29: this.execute.tool = this;
! 30: }
! 31: var Class = BeforeUnloadHandler.prototype;
! 32:
! 33: // form checking code
! 34: Class.isAnyFormChanged = function() {
! 35: for (var i=0; i < this.forms.length; i++) {
! 36: var form = this.forms[i];
! 37: if (this.isElementChanged(form)) {
! 38: return true;
! 39: }
! 40: }
! 41: return false;
! 42: }
! 43: Class.addHandler = function(fn) {
! 44: this.handlers.push(fn);
! 45: }
! 46: Class.onsubmit = function() {
! 47: var tool = window.onbeforeunload && window.onbeforeunload.tool;
! 48: tool.submitting = true;
! 49: }
! 50: Class.addForm = function(form) {
! 51: for (var i = 0; i < this.forms.length; i++) {
! 52: if (this.forms[i]==form) return;
! 53: }
! 54: this.forms.push(form);
! 55: form.onsubmit = this.onsubmit;
! 56: var elements = form.getElementsByTagName('input');
! 57: for (var j = 0; j < elements.length; j++) {
! 58: var ele = elements[j];
! 59: if (ele.type=='hidden') {
! 60: ele.setAttribute('originalValue', ele.defaultValue);
! 61: }
! 62: }
! 63: }
! 64: Class.addForms = function() {
! 65: for (var i = 0; i < arguments.length; i++) {
! 66: var element = arguments[i];
! 67: if (!element) continue;
! 68: if (element.tagName=='FORM') {
! 69: this.addForm(element);
! 70: }
! 71: else {
! 72: var forms = element.getElementsByTagName('form');
! 73: for (var j = 0; j < forms.length; j++) {
! 74: this.addForm(forms[j]);
! 75: }
! 76: }
! 77: }
! 78: }
! 79: Class.removeForms = function() {
! 80: for (var i = 0; i < arguments.length; i++) {
! 81: var element = arguments[i];
! 82: if (!element) continue;
! 83: if (element.tagName=='FORM') {
! 84: for (var j = 0; j < arguments.length; j++) {
! 85: if (this.forms[j] == element) {
! 86: this.forms.splice(j--, 1);
! 87: element.onsubmit=null;
! 88: }
! 89: }
! 90: } else {
! 91: var forms = element.getElementsByTagName('form');
! 92: for (var j = 0; j < forms.length; j++) {
! 93: this.removeForms(forms[j]);
! 94: }
! 95: }
! 96: }
! 97: }
! 98:
! 99: Class.CheckType = function() {};
! 100: var c = Class.CheckType.prototype;
! 101: c.checkbox = c.radio = function(ele) {
! 102: return ele.checked != ele.defaultChecked;
! 103: }
! 104: c.password = c.textarea = c.text = function(ele) {
! 105: return ele.value != ele.defaultValue;
! 106: }
! 107: // hidden: cannot tell on Mozilla without special treatment
! 108: c.hidden = function(ele) {
! 109: var orig = ele.getAttribute("originalValue");
! 110: return orig && (ele.value != orig);
! 111: }
! 112:
! 113: c['select-one'] = function(ele) {
! 114: for (var i=0 ; i < ele.length; i++) {
! 115: var opt = ele.options[i];
! 116: if ( opt.selected != opt.defaultSelected) {
! 117: if (i===0 && opt.selected) continue; /* maybe no default */
! 118: return true;
! 119: }
! 120: }
! 121: return false;
! 122: }
! 123:
! 124: c['select-multiple'] = function(ele) {
! 125: for (var i=0 ; i < ele.length; i++) {
! 126: var opt = ele.options[i];
! 127: if ( opt.selected != opt.defaultSelected) {
! 128: return true;
! 129: }
! 130: }
! 131: return false;
! 132: }
! 133:
! 134: Class.chk_form = function(form) {
! 135: var elements = form.elements;
! 136: for (var i=0; i < elements.length; i++ ) {
! 137: var element = elements[i];
! 138: if (this.isElementChanged(element)) {
! 139: return true;
! 140: }
! 141: }
! 142: return false;
! 143: }
! 144:
! 145: Class.isElementChanged = function(ele) {
! 146: var method = ele.id && this.chkId[ele.id];
! 147: if (!method && ele.type && ele.name)
! 148: method = this.chkType[ele.type];
! 149: if (!method && ele.tagName)
! 150: method = this['chk_'+ele.tagName.toLowerCase()];
! 151:
! 152: return method? method.apply(this, [ele]) : false;
! 153: };
! 154:
! 155: window.onbeforeunload = new BeforeUnloadHandler().execute;
! 156: })();
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>