util.js

几个运用了DWR框架编写的AJAX代码,

function DWRUtil() { }





DWRUtil.onReturn = function(event, action) {
if (!event) {
event = window.event;
}
if (event && event.keyCode && event.keyCode == 13) {
action();
}
};





DWRUtil.selectRange = function(ele, start, end) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("selectRange() can't find an element with id: " + orig + ".");
return;
}
if (ele.setSelectionRange) {
ele.setSelectionRange(start, end);
}
else if (ele.createTextRange) {
var range = ele.createTextRange();
range.moveStart("character", start);
range.moveEnd("character", end - ele.value.length);
range.select();
}
ele.focus();
};




DWRUtil._getSelection = function(ele) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("selectRange() can't find an element with id: " + orig + ".");
return;
}
return ele.value.substring(ele.selectionStart, ele.selectionEnd);





}





var $;
if (!$ && document.getElementById) {
$ = function() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') {
element = document.getElementById(element);
}
if (arguments.length == 1) {
return element;
}
elements.push(element);
}
return elements;
}
}
else if (!$ && document.all) {
$ = function() {
var elements = new Array();
for (var i = 0; i < arguments.length; i++) {
var element = arguments[i];
if (typeof element == 'string') {
element = document.all[element];
}
if (arguments.length == 1) {
return element;
}
elements.push(element);
}
return elements;
}
}





DWRUtil.toDescriptiveString = function(data, level, depth) {
var reply = "";
var i = 0;
var value;
var obj;
if (level == null) level = 0;
if (depth == null) depth = 0;
if (data == null) return "null";
if (DWRUtil._isArray(data)) {
if (data.length == 0) reply += "[]";
else {
if (level != 0) reply += "[\n";
else reply = "[";
for (i = 0; i < data.length; i++) {
try {
obj = data[i];
if (obj == null || typeof obj == "function") {
continue;
}
else if (typeof obj == "object") {
if (level > 0) value = DWRUtil.toDescriptiveString(obj, level - 1, depth + 1);
else value = DWRUtil._detailedTypeOf(obj);
}
else {
value = "" + obj;
value = value.replace(/\/n/g, "\\n");
value = value.replace(/\/t/g, "\\t");
}
}
catch (ex) {
value = "" + ex;
}
if (level != 0)  {
reply += DWRUtil._indent(level, depth + 2) + value + ", \n";
}
else {
if (value.length > 13) value = value.substring(0, 10) + "...";
reply += value + ", ";
if (i > 5) {
reply += "...";
break;
}
}
}
if (level != 0) reply += DWRUtil._indent(level, depth) + "]";
else reply += "]";
}
return reply;
}
if (typeof data == "string" || typeof data == "number" || DWRUtil._isDate(data)) {
return data.toString();
}
if (typeof data == "object") {
var typename = DWRUtil._detailedTypeOf(data);
if (typename != "Object")  reply = typename + " ";
if (level != 0) reply += "{\n";
else reply = "{";
var isHtml = DWRUtil._isHTMLElement(data);
for (var prop in data) {
if (isHtml) {

if (prop.toUpperCase() == prop || prop == "title" ||
prop == "lang" || prop == "dir" || prop == "className" ||
prop == "form" || prop == "name" || prop == "prefix" ||
prop == "namespaceURI" || prop == "nodeType" ||
prop == "firstChild" || prop == "lastChild" ||
prop.match(/^offset/)) {
continue;
}
}
value = "";
try {
obj = data[prop];
if (obj == null || typeof obj == "function") {
continue;
}
else if (typeof obj == "object") {
if (level > 0) {
value = "\n";
value += DWRUtil._indent(level, depth + 2);
value = DWRUtil.toDescriptiveString(obj, level - 1, depth + 1);
}
else {
value = DWRUtil._detailedTypeOf(obj);
}
}
else {
value = "" + obj;
value = value.replace(/\/n/g, "\\n");
value = value.replace(/\/t/g, "\\t");
}
}
catch (ex) {
value = "" + ex;
}
if (level == 0 && value.length > 13) value = value.substring(0, 10) + "...";
var propStr = prop;
if (propStr.length > 30) propStr = propStr.substring(0, 27) + "...";
if (level != 0) reply += DWRUtil._indent(level, depth + 1);
reply += prop + ":" + value + ", ";
if (level != 0) reply += "\n";
i++;
if (level == 0 && i > 5) {
reply += "...";
break;
}
}
reply += DWRUtil._indent(level, depth);
reply += "}";
return reply;
}
return data.toString();
};




DWRUtil._indent = function(level, depth) {
var reply = "";
if (level != 0) {
for (var j = 0; j < depth; j++) {
reply += "\u00A0\u00A0";
}
reply += " ";
}
return reply;
};





DWRUtil.useLoadingMessage = function(message) {
var loadingMessage;
if (message) loadingMessage = message;
else loadingMessage = "Loading";
DWREngine.setPreHook(function() {
var disabledZone = $('disabledZone');
if (!disabledZone) {
disabledZone = document.createElement('div');
disabledZone.setAttribute('id', 'disabledZone');
disabledZone.style.position = "absolute";
disabledZone.style.zIndex = "1000";
disabledZone.style.left = "0px";
disabledZone.style.top = "0px";
disabledZone.style.width = "100%";
disabledZone.style.height = "100%";
document.body.appendChild(disabledZone);
var messageZone = document.createElement('div');
messageZone.setAttribute('id', 'messageZone');
messageZone.style.position = "absolute";
messageZone.style.top = "0px";
messageZone.style.right = "0px";
messageZone.style.background = "red";
messageZone.style.color = "white";
messageZone.style.fontFamily = "Arial,Helvetica,sans-serif";
messageZone.style.padding = "4px";
disabledZone.appendChild(messageZone);
var text = document.createTextNode(loadingMessage);
messageZone.appendChild(text);
}
else {
$('messageZone').innerHTML = loadingMessage;
disabledZone.style.visibility = 'visible';
}
});
DWREngine.setPostHook(function() {
$('disabledZone').style.visibility = 'hidden';
});
}





DWRUtil.setValue = function(ele, val, options) {
if (val == null) val = "";
if (options != null) {
if (options.escapeHtml) {
val = val.replace(/&/, "&amp;");
val = val.replace(/'/, "&apos;");
val = val.replace(/</, "&lt;");
val = val.replace(/>/, "&gt;");
}
}

var orig = ele;
var nodes, node, i;

ele = $(ele);

if (ele == null) {
nodes = document.getElementsByName(orig);
if (nodes.length >= 1) {
ele = nodes.item(0);
}
}
if (ele == null) {
DWRUtil.debug("setValue() can't find an element with id/name: " + orig + ".");
return;
}

if (DWRUtil._isHTMLElement(ele, "select")) {
if (ele.type == "select-multiple" && DWRUtil._isArray(val)) {
DWRUtil._selectListItems(ele, val);
}
else {
DWRUtil._selectListItem(ele, val);
}
return;
}

if (DWRUtil._isHTMLElement(ele, "input")) {
if (ele.type == "radio") {

if (nodes == null) nodes = document.getElementsByName(orig);
if (nodes != null && nodes.length > 1) {
for (i = 0; i < nodes.length; i++) {
node = nodes.item(i);
if (node.type == "radio") {
node.checked = (node.value == val);
}
}
}
else {
ele.checked = (val == true);
}
}
else if (ele.type == "checkbox") {
ele.checked = val;
}
else {
ele.value = val;
}
return;
}

if (DWRUtil._isHTMLElement(ele, "textarea")) {
ele.value = val;
return;
}



if (val.nodeType) {
if (val.nodeType == 9  ) {
val = val.documentElement;
}

val = DWRUtil._importNode(ele.ownerDocument, val, true);
ele.appendChild(val);
return;
}


ele.innerHTML = val;
};






DWRUtil._selectListItems = function(ele, val) {


var found  = false;
var i;
var j;
for (i = 0; i < ele.options.length; i++) {
ele.options[i].selected = false;
for (j = 0; j < val.length; j++) {
if (ele.options[i].value == val[j]) {
ele.options[i].selected = true;
}
}
}

if (found) return;

for (i = 0; i < ele.options.length; i++) {
for (j = 0; j < val.length; j++) {
if (ele.options[i].text == val[j]) {
ele.options[i].selected = true;
}
}
}
};






DWRUtil._selectListItem = function(ele, val) {


var found  = false;
var i;
for (i = 0; i < ele.options.length; i++) {
if (ele.options[i].value == val) {
ele.options[i].selected = true;
found = true;
}
else {
ele.options[i].selected = false;
}
}


if (found) return;

for (i = 0; i < ele.options.length; i++) {
if (ele.options[i].text == val) {
ele.options[i].selected = true;
}
else {
ele.options[i].selected = false;
}
}
}





DWRUtil.getValue = function(ele, options) {
if (options == null) {
options = {};
}
var orig = ele;
ele = $(ele);


var nodes = document.getElementsByName(orig);
if (ele == null && nodes.length >= 1) {
ele = nodes.item(0);
}
if (ele == null) {
DWRUtil.debug("getValue() can't find an element with id/name: " + orig + ".");
return "";
}

if (DWRUtil._isHTMLElement(ele, "select")) {


var sel = ele.selectedIndex;
if (sel != -1) {