util.js

几个运用了DWR框架编写的AJAX代码,

var reply = ele.options[sel].value;
if (reply == null || reply == "") {
reply = ele.options[sel].text;
}

return reply;
}
else {
return "";
}
}

if (DWRUtil._isHTMLElement(ele, "input")) {
if (ele.type == "radio") {
var node;
for (i = 0; i < nodes.length; i++) {
node = nodes.item(i);
if (node.type == "radio") {
if (node.checked) {
if (nodes.length > 1) return node.value;
else return true;
}
}
}
}
switch (ele.type) {
case "checkbox":
case "check-box":
case "radio":
return ele.checked;
default:
return ele.value;
}
}

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

if (options.textContent) {
if (ele.textContent) return ele.textContent;
else if (ele.innerText) return ele.innerText;
}
return ele.innerHTML;
};





DWRUtil.getText = function(ele) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("getText() can't find an element with id: " + orig + ".");
return "";
}

if (!DWRUtil._isHTMLElement(ele, "select")) {
DWRUtil.debug("getText() can only be used with select elements. Attempt to use: " + DWRUtil._detailedTypeOf(ele) + " from  id: " + orig + ".");
return "";
}



var sel = ele.selectedIndex;
if (sel != -1) {
return ele.options[sel].text;
}
else {
return "";
}
};





DWRUtil.setValues = function(map) {
for (var property in map) {

if ($(property) != null || document.getElementsByName(property).length >= 1) {
DWRUtil.setValue(property, map[property]);
}
}
};






DWRUtil.getValues = function(data) {
var ele;
if (typeof data == "string") ele = $(data);
if (DWRUtil._isHTMLElement(data)) ele = data;
if (ele != null) {
if (ele.elements == null) {
alert("getValues() requires an object or reference to a form element.");
return null;
}
var reply = {};
var value;
for (var i = 0; i < ele.elements.length; i++) {
if (ele[i].id != null) value = ele[i].id;
else if (ele[i].value != null) value = ele[i].value;
else value = "element" + i;
reply[value] = DWRUtil.getValue(ele[i]);
}
return reply;
}
else {
for (var property in data) {

if ($(property) != null || document.getElementsByName(property).length >= 1) {
data[property] = DWRUtil.getValue(property);
}
}
return data;
}
};





DWRUtil.addOptions = function(ele, data) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("addOptions() can't find an element with id: " + orig + ".");
return;
}
var useOptions = DWRUtil._isHTMLElement(ele, "select");
var useLi = DWRUtil._isHTMLElement(ele, ["ul", "ol"]);
if (!useOptions && !useLi) {
DWRUtil.debug("addOptions() can only be used with select/ul/ol elements. Attempt to use: " + DWRUtil._detailedTypeOf(ele));
return;
}
if (data == null) return;

var text;
var value;
var opt;
var li;
if (DWRUtil._isArray(data)) {

for (var i = 0; i < data.length; i++) {
if (useOptions) {
if (arguments[2] != null) {
if (arguments[3] != null) {
text = DWRUtil._getValueFrom(data[i], arguments[3]);
value = DWRUtil._getValueFrom(data[i], arguments[2]);
}
else {
value = DWRUtil._getValueFrom(data[i], arguments[2]);
text = value;
}
}
else
{
text = DWRUtil._getValueFrom(data[i], arguments[3]);
value = text;
}
if (text || value) {
opt = new Option(text, value);
ele.options[ele.options.length] = opt;
}
}
else {
li = document.createElement("li");
value = DWRUtil._getValueFrom(data[i], arguments[2]);
if (value != null) {
li.innerHTML = value;
ele.appendChild(li);
}
}
}
}
else if (arguments[3] != null) {
for (var prop in data) {
if (!useOptions) {
alert("DWRUtil.addOptions can only create select lists from objects.");
return;
}
value = DWRUtil._getValueFrom(data[prop], arguments[2]);
text = DWRUtil._getValueFrom(data[prop], arguments[3]);
if (text || value) {
opt = new Option(text, value);
ele.options[ele.options.length] = opt;
}
}
}
else {
for (var prop in data) {
if (!useOptions) {
DWRUtil.debug("DWRUtil.addOptions can only create select lists from objects.");
return;
}
if (typeof data[prop] == "function") {

text = null;
value = null;
}
else if (arguments[2]) {
text = prop;
value = data[prop];
}
else {
text = data[prop];
value = prop;
}
if (text || value) {
opt = new Option(text, value);
ele.options[ele.options.length] = opt;
}
}
}
};




DWRUtil._getValueFrom = function(data, method) {
if (method == null) return data;
else if (typeof method == 'function') return method(data);
else return data[method];
}





DWRUtil.removeAllOptions = function(ele) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("removeAllOptions() can't find an element with id: " + orig + ".");
return;
}
var useOptions = DWRUtil._isHTMLElement(ele, "select");
var useLi = DWRUtil._isHTMLElement(ele, ["ul", "ol"]);
if (!useOptions && !useLi) {
DWRUtil.debug("removeAllOptions() can only be used with select, ol and ul elements. Attempt to use: " + DWRUtil._detailedTypeOf(ele));
return;
}
if (useOptions) {
ele.options.length = 0;
}
else {
while (ele.childNodes.length > 0) {
ele.removeChild(ele.firstChild);
}
}
};





DWRUtil.addRows = function(ele, data, cellFuncs, options) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("addRows() can't find an element with id: " + orig + ".");
return;
}
if (!DWRUtil._isHTMLElement(ele, ["table", "tbody", "thead", "tfoot"])) {
DWRUtil.debug("addRows() can only be used with table, tbody, thead and tfoot elements. Attempt to use: " + DWRUtil._detailedTypeOf(ele));
return;
}
if (!options) options = {};
if (!options.rowCreator) options.rowCreator = DWRUtil._defaultRowCreator;
if (!options.cellCreator) options.cellCreator = DWRUtil._defaultCellCreator;
var tr, rowNum;
if (DWRUtil._isArray(data)) {
for (rowNum = 0; rowNum < data.length; rowNum++) {
options.rowData = data[rowNum];
options.rowIndex = rowNum;
options.rowNum = rowNum;
options.data = null;
options.cellNum = -1;
tr = DWRUtil._addRowInner(cellFuncs, options);
if (tr != null) ele.appendChild(tr);
}
}
else if (typeof data == "object") {
rowNum = 0;
for (var rowIndex in data) {
options.rowData = data[rowIndex];
options.rowIndex = rowIndex;
options.rowNum = rowNum;
options.data = null;
options.cellNum = -1;
tr = DWRUtil._addRowInner(cellFuncs, options);
if (tr != null) ele.appendChild(tr);
rowNum++;
}
}
};




DWRUtil._addRowInner = function(cellFuncs, options) {
var tr = options.rowCreator(options);
if (tr == null) return null;
for (var cellNum = 0; cellNum < cellFuncs.length; cellNum++) {
var func = cellFuncs[cellNum];
var td;







var reply = func(options.rowData);
options.data = reply;
options.cellNum = cellNum;
td = options.cellCreator(options);
if (DWRUtil._isHTMLElement(reply, "td")) td = reply;
else if (DWRUtil._isHTMLElement(reply)) td.appendChild(reply);
else td.innerHTML = reply;

tr.appendChild(td);
}
return tr;
};




DWRUtil._defaultRowCreator = function(options) {
return document.createElement("tr");
};




DWRUtil._defaultCellCreator = function(options) {
return document.createElement("td");
};





DWRUtil.removeAllRows = function(ele) {
var orig = ele;
ele = $(ele);
if (ele == null) {
DWRUtil.debug("removeAllRows() can't find an element with id: " + orig + ".");
return;
}
if (!DWRUtil._isHTMLElement(ele, ["table", "tbody", "thead", "tfoot"])) {
DWRUtil.debug("removeAllRows() can only be used with table, tbody, thead and tfoot elements. Attempt to use: " + DWRUtil._detailedTypeOf(ele));
return;
}
while (ele.childNodes.length > 0) {
ele.removeChild(ele.firstChild);
}
};







DWRUtil._isHTMLElement = function(ele, nodeName) {
if (ele == null || typeof ele != "object" || ele.nodeName == null) {
return false;
}

if (nodeName != null) {
var test = ele.nodeName.toLowerCase();

if (typeof nodeName == "string") {
return test == nodeName.toLowerCase();
}

if (DWRUtil._isArray(nodeName)) {
var match = false;
for (var i = 0; i < nodeName.length && !match; i++) {
if (test == nodeName[i].toLowerCase()) {
match =  true;
}
}
return match;
}

DWRUtil.debug("DWRUtil._isHTMLElement was passed test node name that is neither a string or array of strings");
return false;
}

return true;
};




DWRUtil._detailedTypeOf = function(x) {
var reply = typeof x;
if (reply == "object") {
reply = Object.prototype.toString.apply(x);
reply = reply.substring(8, reply.length-1);
}
return reply;
};




DWRUtil._isArray = function(data) {
return (data && data.join) ? true : false;
};




DWRUtil._isDate = function(data) {
return (data && data.toUTCString) ? true : false;
};




DWRUtil._importNode = function(doc, importedNode, deep) {
var newNode;

if (importedNode.nodeType == 1  ) {
newNode = doc.createElement(importedNode.nodeName);

for (var i = 0; i < importedNode.attributes.length; i++) {
var attr = importedNode.attributes[i];
if (attr.nodeValue != null && attr.nodeValue != '') {
newNode.setAttribute(attr.name, attr.nodeValue);
}
}

if (typeof importedNode.style != "undefined") {
newNode.style.cssText = importedNode.style.cssText;
}
}
else if (importedNode.nodeType == 3  ) {
newNode = doc.createTextNode(importedNode.nodeValue);
}

if (deep && importedNode.hasChildNodes()) {
for (i = 0; i < importedNode.childNodes.length; i++) {
newNode.appendChild(DWRUtil._importNode(doc, importedNode.childNodes[i], true));
}
}

return newNode;
}




DWRUtil.debug = function(message) {
alert(message);
}