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