Annotation of kupuMPIWG/common/kupubeforeunload.js, revision 1.1.1.1
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: })();
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