src/hg/js/ajax.js 1.7

Index: src/hg/js/ajax.js
===================================================================
RCS file: /projects/compbio/cvsroot/kent/src/hg/js/ajax.js,v
retrieving revision 1.6
retrieving revision 1.7
diff -b -B -U 1000000 -r1.6 -r1.7
--- src/hg/js/ajax.js	16 Feb 2010 01:26:45 -0000	1.6
+++ src/hg/js/ajax.js	14 May 2010 17:29:34 -0000	1.7
@@ -1,100 +1,123 @@
 // AJAX Utilities
 
 var debug = false;
 
 var req;
 
 function nullProcessReqChange()
 {
     if(debug)
             alert("req.responseText: " + req.responseText);
 }
 
 function loadXMLDoc(url)
 {
 // Load XML without a request handler; this is useful if you are sending one-way messages.
         loadXMLDoc(url, null);
 }
 
 function loadXMLDoc(url, callBack)
 {
 // From http://developer.apple.com/internet/webcontent/xmlhttpreq.html
     if(callBack == null)
         callBack = nullProcessReqChange;
     req = false;
     // branch for native XMLHttpRequest object
     if(window.XMLHttpRequest && !(window.ActiveXObject)) {
         try {
             req = new XMLHttpRequest();
         } catch(e) {
             req = false;
         }
     } else if(window.ActiveXObject) {
         // branch for IE/Windows ActiveX version
         try {
             req = new ActiveXObject("Msxml2.XMLHTTP");
         } catch(e) {
             try {
                 req = new ActiveXObject("Microsoft.XMLHTTP");
             } catch(e) {
                 req = false;
             }
         }
     }
     if(debug)
         alert(url);
     if(req) {
         req.onreadystatechange = callBack;
         req.open("GET", url, true);
         req.send("");
     }
 }
 
-function setCartVar(name, value)
+function setCartVars(names, values)
 {
-// Asynchronously set a cart variable.
+// Asynchronously sets the array of cart vars with values
+    if(names.length <= 0)
+        return;
+
+    // Set up constant portion of url
     var loc = window.location.href;
     if(loc.indexOf("?") > -1) {
         loc = loc.substring(0, loc.indexOf("?"));
     }
     if(loc.lastIndexOf("/") > -1) {
         loc = loc.substring(0, loc.lastIndexOf("/"));
     }
     loc = loc + "/cartDump";
     var hgsid = getHgsid();
-    loc = loc + "?submit=1&noDisplay=1&cartDump.varName=" + escape(name) + "&cartDump.newValue=" + escape(value) + "&hgsid=" + hgsid;
-    loadXMLDoc(loc);
+    loc = loc + "?submit=1&noDisplay=1&hgsid=" + hgsid;
+
+    // Set up dynamic portion of url
+    var ix=0;
+    while( ix < names.length ) { // Sends multiple messages if the URL gets too long
+        var pairs = "";
+        for(  ;ix<names.length && pairs.length < 5000;ix++) {  // FIXME: How big is too big?
+            //pairs = pairs + "&cartDump.varName=" + escape(names[ix]) + "&cartDump.newValue=" + escape(values[ix]);
+            pairs = pairs + "&" + escape(names[ix]) + "=" + escape(values[ix]);
+        }
+        if(pairs.length == 0)
+            return;
+        //warn(pairs);
+        loadXMLDoc(loc + pairs);
+    }
+}
+
+function setCartVar(name, value)
+{
+// Asynchronously set a cart variable.
+    setCartVars( [ name ], [ value ] );
 }
 
 function submitMain()
 {
     $('form[name="mainForm"]').submit();
 }
 
 function setCartVarAndRefresh(name,val)
 {
     setCartVar(name,val);
     var main=$('form[name="mainForm"]')
     $(main).attr('action',window.location.href);
     setTimeout("submitMain()",50);  // Delay in submit helps ensure that cart var has gotten there first.
 
     return false;
 }
 
 function catchErrorOrDispatch(obj, status)
 {
 // generic ajax success handler (handles fact that success is not always success).
     if(status == 'success')
         this.trueSuccess(obj, status);
     else
     {
         showWarning("ajax error: " + status);
         jQuery('body').css('cursor', '');
     }
 }
 
 function showWarning(str)
 {
     $("#warningText").text(str);
     $("#warning").show();
 }