551 lines
14 KiB
JavaScript
551 lines
14 KiB
JavaScript
function Xajax()
|
|
{
|
|
if (xajaxDebug) this.DebugMessage = function(text) { alert("Xajax Debug:\n " + text) };
|
|
|
|
this.workId = 'xajaxWork'+ new Date().getTime();
|
|
this.depth = 0;
|
|
|
|
//Get the XMLHttpRequest Object
|
|
this.getRequestObject = function()
|
|
{
|
|
if (xajaxDebug) this.DebugMessage("Initializing Request Object..");
|
|
var req;
|
|
try
|
|
{
|
|
req=new ActiveXObject("Msxml2.XMLHTTP");
|
|
}
|
|
catch (e)
|
|
{
|
|
try
|
|
{
|
|
req=new ActiveXObject("Microsoft.XMLHTTP");
|
|
}
|
|
catch (e2)
|
|
{
|
|
req=null;
|
|
}
|
|
}
|
|
if(!req && typeof XMLHttpRequest != "undefined")
|
|
req = new XMLHttpRequest();
|
|
|
|
if (xajaxDebug) {
|
|
if (!req) this.DebugMessage("Request Object Instantiation failed.");
|
|
}
|
|
|
|
return req;
|
|
}
|
|
|
|
// xajax.$() is shorthand for document.getElementById()
|
|
this.$ = function(sId)
|
|
{
|
|
if (!sId) {
|
|
return null;
|
|
}
|
|
var returnObj = document.getElementById(sId);
|
|
if (xajaxDebug && !returnObj && sId != this.workId) {
|
|
this.DebugMessage("Element with the id \"" + sId + "\" not found.");
|
|
}
|
|
return returnObj;
|
|
}
|
|
|
|
// xajax.include(sFileName) dynamically includes an external javascript file
|
|
this.include = function(sFileName)
|
|
{
|
|
var objHead = document.getElementsByTagName('head');
|
|
var objScript = document.createElement('script');
|
|
objScript.type = 'text/javascript';
|
|
objScript.src = sFileName;
|
|
objHead[0].appendChild(objScript);
|
|
}
|
|
|
|
// xajax.addHandler adds an event handler to an element
|
|
this.addHandler = function(sElementId, sEvent, sFunctionName)
|
|
{
|
|
if (window.addEventListener)
|
|
{
|
|
eval("this.$('"+sElementId+"').addEventListener('"+sEvent+"',"+sFunctionName+",false);");
|
|
}
|
|
else
|
|
{
|
|
eval("this.$('"+sElementId+"').attachEvent('on"+sEvent+"',"+sFunctionName+",false);");
|
|
}
|
|
}
|
|
|
|
// xajax.removeHandler removes an event handler from an element
|
|
this.removeHandler = function(sElementId, sEvent, sFunctionName)
|
|
{
|
|
if (window.addEventListener)
|
|
{
|
|
eval("this.$('"+sElementId+"').removeEventListener('"+sEvent+"',"+sFunctionName+",false);");
|
|
}
|
|
else
|
|
{
|
|
eval("this.$('"+sElementId+"').detachEvent('on"+sEvent+"',"+sFunctionName+",false);");
|
|
}
|
|
}
|
|
|
|
// xajax.create creates a new child node under a parent
|
|
this.create = function(sParentId, sTag, sId)
|
|
{
|
|
var objParent = this.$(sParentId);
|
|
objElement = document.createElement(sTag);
|
|
objElement.setAttribute('id',sId);
|
|
objParent.appendChild(objElement);
|
|
}
|
|
|
|
// xajax.insert inserts a new node before another node
|
|
this.insert = function(sBeforeId, sTag, sId)
|
|
{
|
|
var objSibling = this.$(sBeforeId);
|
|
objElement = document.createElement(sTag);
|
|
objElement.setAttribute('id',sId);
|
|
objSibling.parentNode.insertBefore(objElement, objSibling);
|
|
}
|
|
|
|
this.getInput = function(sType, sName, sId)
|
|
{
|
|
var Obj;
|
|
if (sType == "radio" && !window.addEventListener)
|
|
{
|
|
Obj = document.createElement('<input type="radio" id="'+sId+'" name="'+sName+'">');
|
|
}
|
|
else
|
|
{
|
|
Obj = document.createElement('input');
|
|
Obj.setAttribute('type',sType);
|
|
Obj.setAttribute('name',sName);
|
|
Obj.setAttribute('id',sId);
|
|
}
|
|
return Obj;
|
|
}
|
|
|
|
// xajax.createInput creates a new input node under a parent
|
|
this.createInput = function(sParentId, sType, sName, sId)
|
|
{
|
|
var objParent = this.$(sParentId);
|
|
var objElement = this.getInput(sType, sName, sId);
|
|
objParent.appendChild(objElement);
|
|
}
|
|
|
|
// xajax.insertInput creates a new input node before another node
|
|
this.insertInput = function(sBeforeId, sType, sName, sId)
|
|
{
|
|
var objSibling = this.$(sBeforeId);
|
|
var objElement = this.getInput(sType, sName, sId);
|
|
objSibling.parentNode.insertBefore(objElement, objSibling);
|
|
}
|
|
|
|
// xajax.remove deletes an element
|
|
this.remove = function(sId)
|
|
{
|
|
objElement = this.$(sId);
|
|
if (objElement.parentNode && objElement.parentNode.removeChild)
|
|
{
|
|
objElement.parentNode.removeChild(objElement);
|
|
}
|
|
}
|
|
|
|
//xajax.replace searches for text in an attribute of an element and replaces it
|
|
//with a different text
|
|
this.replace = function(sId,sAttribute,sSearch,sReplace)
|
|
{
|
|
var bFunction = false;
|
|
|
|
if (sAttribute == "innerHTML")
|
|
sSearch = this.getBrowserHTML(sSearch);
|
|
|
|
eval("var txt=document.getElementById('"+sId+"')."+sAttribute);
|
|
if (typeof txt == "function")
|
|
{
|
|
txt = txt.toString();
|
|
bFunction = true;
|
|
}
|
|
if (txt.indexOf(sSearch)>-1)
|
|
{
|
|
var newTxt = '';
|
|
while (txt.indexOf(sSearch) > -1)
|
|
{
|
|
x = txt.indexOf(sSearch)+sSearch.length+1;
|
|
newTxt += txt.substr(0,x).replace(sSearch,sReplace);
|
|
txt = txt.substr(x,txt.length-x);
|
|
}
|
|
newTxt += txt;
|
|
if (bFunction)
|
|
{
|
|
eval("newTxt =" + newTxt);
|
|
eval('this.$("'+sId+'").'+sAttribute+'=newTxt;');
|
|
}
|
|
else if (this.willChange(sId,sAttribute,newTxt))
|
|
{
|
|
eval('this.$("'+sId+'").'+sAttribute+'=newTxt;');
|
|
}
|
|
}
|
|
}
|
|
|
|
// xajax.getFormValues() builds a query string XML message from the elements of a form object
|
|
this.getFormValues = function(frm)
|
|
{
|
|
var objForm;
|
|
var submitDisabledElements = false;
|
|
if (arguments.length > 1 && arguments[1] == true)
|
|
submitDisabledElements = true;
|
|
|
|
if (typeof(frm) == "string")
|
|
objForm = this.$(frm);
|
|
else
|
|
objForm = frm;
|
|
var sXml = "<xjxquery><q>";
|
|
if (objForm && objForm.tagName == 'FORM')
|
|
{
|
|
var formElements = objForm.elements;
|
|
for( var i=0; i < formElements.length; i++)
|
|
{
|
|
if (formElements[i].type && (formElements[i].type == 'radio' || formElements[i].type == 'checkbox') && formElements[i].checked == false)
|
|
continue;
|
|
if (formElements[i].disabled && formElements[i].disabled == true && submitDisabledElements == false) continue;
|
|
var name = formElements[i].name;
|
|
if (name)
|
|
{
|
|
if (sXml != '<xjxquery><q>')
|
|
sXml += '&';
|
|
if(formElements[i].type=='select-multiple')
|
|
{
|
|
for (var j = 0; j < formElements[i].length; j++)
|
|
{
|
|
if (formElements[i].options[j].selected == true) sXml += name+"="+encodeURIComponent(formElements[i].options[j].value)+"&";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sXml += name+"="+encodeURIComponent(formElements[i].value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
sXml +="</q></xjxquery>";
|
|
|
|
return sXml;
|
|
}
|
|
|
|
// Generates an XML message that xajax can understand from a javascript object
|
|
this.objectToXML = function(obj)
|
|
{
|
|
var sXml = "<xjxobj>";
|
|
for (i in obj)
|
|
{
|
|
try
|
|
{
|
|
if (i == 'constructor')
|
|
continue;
|
|
if (obj[i] && typeof(obj[i]) == 'function')
|
|
continue;
|
|
|
|
var key = i;
|
|
var value = obj[i];
|
|
if (value && typeof(value)=="object" &&
|
|
(value.constructor == Array
|
|
) && this.depth <= 50)
|
|
{
|
|
this.depth++;
|
|
value = this.objectToXML(value);
|
|
this.depth--;
|
|
}
|
|
|
|
sXml += "<e><k>"+key+"</k><v>"+value+"</v></e>";
|
|
|
|
}
|
|
catch(e)
|
|
{
|
|
if (xajaxDebug) this.DebugMessage(e);
|
|
}
|
|
}
|
|
sXml += "</xjxobj>";
|
|
|
|
return sXml;
|
|
}
|
|
|
|
// Sends a XMLHttpRequest to call the specified PHP function on the server
|
|
// * sRequestType is optional -- defaults to POST
|
|
this.call = function(sFunction, aArgs, sRequestType)
|
|
{
|
|
var i,r,postData;
|
|
if (document.body && xajaxWaitCursor)
|
|
document.body.style.cursor = 'wait';
|
|
if (xajaxStatusMessages == true) window.status = 'Sending Request...';
|
|
if (xajaxDebug) this.DebugMessage("Starting xajax...");
|
|
if (sRequestType == null) {
|
|
var xajaxRequestType = xajaxDefinedPost;
|
|
}
|
|
else {
|
|
var xajaxRequestType = sRequestType;
|
|
}
|
|
var uri = xajaxRequestUri;
|
|
var value;
|
|
switch(xajaxRequestType)
|
|
{
|
|
case xajaxDefinedGet:{
|
|
var uriGet = uri.indexOf("?")==-1?"?xajax="+encodeURIComponent(sFunction):"&xajax="+encodeURIComponent(sFunction);
|
|
if (aArgs) {
|
|
for (i = 0; i<aArgs.length; i++)
|
|
{
|
|
value = aArgs[i];
|
|
if (typeof(value)=="object")
|
|
value = this.objectToXML(value);
|
|
uriGet += "&xajaxargs[]="+encodeURIComponent(value);
|
|
}
|
|
}
|
|
uriGet += "&xajaxr=" + new Date().getTime();
|
|
uri += uriGet;
|
|
postData = null;
|
|
} break;
|
|
case xajaxDefinedPost:{
|
|
postData = "xajax="+encodeURIComponent(sFunction);
|
|
postData += "&xajaxr="+new Date().getTime();
|
|
if (aArgs) {
|
|
for (i = 0; i <aArgs.length; i++)
|
|
{
|
|
value = aArgs[i];
|
|
if (typeof(value)=="object")
|
|
value = this.objectToXML(value);
|
|
postData = postData+"&xajaxargs[]="+encodeURIComponent(value);
|
|
}
|
|
}
|
|
} break;
|
|
default:
|
|
alert("Illegal request type: " + xajaxRequestType); return false; break;
|
|
}
|
|
r = this.getRequestObject();
|
|
if (!r) return false;
|
|
r.open(xajaxRequestType==xajaxDefinedGet?"GET":"POST", uri, true);
|
|
if (xajaxRequestType == xajaxDefinedPost)
|
|
{
|
|
try
|
|
{
|
|
r.setRequestHeader("Method", "POST " + uri + " HTTP/1.1");
|
|
r.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
|
|
}
|
|
catch(e)
|
|
{
|
|
alert("Your browser does not appear to support asynchronous requests using POST.");
|
|
return false;
|
|
}
|
|
}
|
|
r.onreadystatechange = function()
|
|
{
|
|
if (r.readyState != 4)
|
|
return;
|
|
|
|
if (r.status==200)
|
|
{
|
|
if (xajaxDebug && r.responseText.length < 1000) xajax.DebugMessage("Received:\n" + r.responseText);
|
|
else if (xajaxDebug) xajax.DebugMessage("Received:\n" + r.responseText.substr(0,1000)+"...\n[long response]\n...</xajax>");
|
|
if (r.responseXML)
|
|
xajax.processResponse(r.responseXML);
|
|
else {
|
|
alert("Error: the XML response that was returned from the server is invalid.");
|
|
document.body.style.cursor = 'default';
|
|
if (xajaxStatusMessages == true) window.status = 'Invalid XML response error';
|
|
}
|
|
}
|
|
|
|
delete r;
|
|
}
|
|
if (xajaxDebug) this.DebugMessage("Calling "+sFunction +" uri="+uri+" (post:"+ postData +")");
|
|
r.send(postData);
|
|
if (xajaxStatusMessages == true) window.status = 'Waiting for data...';
|
|
delete r;
|
|
return true;
|
|
}
|
|
|
|
//Gets the text as it would be if it were being retrieved from
|
|
//the innerHTML property in the current browser
|
|
this.getBrowserHTML = function(html)
|
|
{
|
|
tmpXajax = this.$(this.workId);
|
|
if (tmpXajax == null)
|
|
{
|
|
tmpXajax = document.createElement("div");
|
|
tmpXajax.setAttribute('id',this.workId);
|
|
tmpXajax.style.display = "none";
|
|
tmpXajax.style.visibility = "hidden";
|
|
document.body.appendChild(tmpXajax);
|
|
}
|
|
tmpXajax.innerHTML = html;
|
|
var browserHTML = tmpXajax.innerHTML;
|
|
tmpXajax.innerHTML = '';
|
|
|
|
return browserHTML;
|
|
}
|
|
|
|
// Tests if the new Data is the same as the extant data
|
|
this.willChange = function(element, attribute, newData)
|
|
{
|
|
if (!document.body)
|
|
{
|
|
return true;
|
|
}
|
|
var oldData;
|
|
if (attribute == "innerHTML")
|
|
{
|
|
newData = this.getBrowserHTML(newData);
|
|
}
|
|
eval("oldData=document.getElementById('"+element+"')."+attribute);
|
|
if (newData != oldData)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
//Process XML xajaxResponses returned from the request
|
|
this.processResponse = function(xml)
|
|
{
|
|
if (xajaxStatusMessages == true) window.status = 'Processing...';
|
|
var tmpXajax = null;
|
|
xml = xml.documentElement;
|
|
if (xml == null) {
|
|
alert("Error: the XML response that was returned from the server cannot be processed.");
|
|
document.body.style.cursor = 'default';
|
|
if (xajaxStatusMessages == true) window.status = 'XML response processing error';
|
|
return;
|
|
}
|
|
for (i=0; i<xml.childNodes.length; i++)
|
|
{
|
|
if (xml.childNodes[i].nodeName == "cmd")
|
|
{
|
|
var cmd;
|
|
var id;
|
|
var property;
|
|
var data;
|
|
var search;
|
|
var type;
|
|
var before;
|
|
|
|
for (j=0; j<xml.childNodes[i].attributes.length; j++)
|
|
{
|
|
if (xml.childNodes[i].attributes[j].name == "n")
|
|
{
|
|
cmd = xml.childNodes[i].attributes[j].value;
|
|
}
|
|
if (xml.childNodes[i].attributes[j].name == "t")
|
|
{
|
|
id = xml.childNodes[i].attributes[j].value;
|
|
}
|
|
if (xml.childNodes[i].attributes[j].name == "p")
|
|
{
|
|
property = xml.childNodes[i].attributes[j].value;
|
|
}
|
|
if (xml.childNodes[i].attributes[j].name == "c")
|
|
{
|
|
type = xml.childNodes[i].attributes[j].value;
|
|
}
|
|
}
|
|
if (xml.childNodes[i].childNodes.length > 1)
|
|
{
|
|
for (j=0; j<xml.childNodes[i].childNodes.length; j++)
|
|
{
|
|
if (xml.childNodes[i].childNodes[j].nodeName == "s")
|
|
{
|
|
if (xml.childNodes[i].childNodes[j].firstChild)
|
|
search = xml.childNodes[i].childNodes[j].firstChild.nodeValue;
|
|
}
|
|
if (xml.childNodes[i].childNodes[j].nodeName == "r")
|
|
{
|
|
if (xml.childNodes[i].childNodes[j].firstChild)
|
|
data = xml.childNodes[i].childNodes[j].firstChild.data;
|
|
}
|
|
}
|
|
}
|
|
else if (xml.childNodes[i].firstChild)
|
|
data = xml.childNodes[i].firstChild.nodeValue;
|
|
else
|
|
data = "";
|
|
|
|
var objElement = this.$(id);
|
|
try
|
|
{
|
|
if (cmd=="al")
|
|
{
|
|
alert(data);
|
|
}
|
|
if (cmd=="js")
|
|
{
|
|
eval(data);
|
|
}
|
|
if (cmd=="in")
|
|
{
|
|
this.include(data);
|
|
}
|
|
if (cmd=="as")
|
|
{
|
|
if (this.willChange(id,property,data))
|
|
{
|
|
eval("objElement."+property+"=data;");
|
|
}
|
|
}
|
|
if (cmd=="ap")
|
|
{
|
|
eval("objElement."+property+"+=data;");
|
|
}
|
|
if (cmd=="pp")
|
|
{
|
|
eval("objElement."+property+"=data+objElement."+property);
|
|
}
|
|
if (cmd=="rp")
|
|
{
|
|
this.replace(id,property,search,data)
|
|
}
|
|
if (cmd=="rm")
|
|
{
|
|
this.remove(id);
|
|
}
|
|
if (cmd=="ce")
|
|
{
|
|
this.create(id,data,property);
|
|
}
|
|
if (cmd=="ie")
|
|
{
|
|
this.insert(id,data,property);
|
|
}
|
|
if (cmd=="ci")
|
|
{
|
|
this.createInput(id,type,data,property);
|
|
}
|
|
if (cmd=="ii")
|
|
{
|
|
this.insertInput(id,type,data,property);
|
|
}
|
|
if (cmd=="ev")
|
|
{
|
|
eval("this.$('"+id+"')."+property+"= function(){"+data+";}");
|
|
}
|
|
if (cmd=="ah")
|
|
{
|
|
this.addHandler(id, property, data);
|
|
}
|
|
if (cmd=="rh")
|
|
{
|
|
this.removeHandler(id, property, data);
|
|
}
|
|
}
|
|
catch(e)
|
|
{
|
|
alert(e);
|
|
}
|
|
delete objElement;
|
|
delete cmd;
|
|
delete id;
|
|
delete property;
|
|
delete search;
|
|
delete data;
|
|
delete type;
|
|
delete before;
|
|
}
|
|
}
|
|
delete xml;
|
|
document.body.style.cursor = 'default';
|
|
if (xajaxStatusMessages == true) window.status = 'Done';
|
|
}
|
|
}
|
|
|
|
var xajax = new Xajax(); |