User:Dr pda/showlistclass.js

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Documentation for this user script can be added at User:Dr pda/showlistclass.

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 //This function displays the count of List-Class Heraldry and Vexillology items
 //It only works on the page /wiki/Wikipedia:WikiProject_Heraldry_and_vexillology/Assessment
 //It also assumes that there are less than 200 pages in the category
 //It requires the function loadXMLDoc(url, handler), which is part of Interiot's Tool2

 function loadXMLDoc(url,handler)
 {
     // branch for native XMLHttpRequest object
     if (window.XMLHttpRequest) {
         req = new XMLHttpRequest();
         req.onreadystatechange = function () {handler(req)};
         req.open("GET", url, true);
         req.send("");
     // branch for IE/Windows ActiveX version
     } else if (window.ActiveXObject) {
         req = new ActiveXObject("Microsoft.XMLHTTP");
         if (req) {
           req.onreadystatechange = function () {handler(req)};
           req.open("GET", url, true);
           req.send("");
         }
     }
 }


 function addListClass(req) {
     // only if req shows "loaded"
     if (req.readyState == 4) {
 alert("state 4");
         // only if "OK"
         if (req.status == 200) {
             // ...processing statements go here...
 alert("state 200");
 	 response = req.responseText;
          targetPara = response.match(/There are \d+ pages in this section of this category/) + '';
 	 countList = parseInt(targetPara.substring(9));
 alert(countList);
 	 addClassCell(8,countList,"background: lightblue; text-align: center",'<b><a href="/wiki/Category:List-Class_heraldry_and_vexillology_articles">List</a></b>');
         } else {
             alert("There was a problem retrieving the XML data:\n" +
                 req.statusText);
         }
     }
  }


 function addClassCell(row,count,style, html){
  //Get list of <table>s in the HTML document
  var tables = document.getElementsByTagName('table');

 //Loop over all tables
 for(var i=0; i<tables.length; i++){
  //Check that it is the right table
  var captions = tables[i].getElementsByTagName('caption');
  if(captions[0].firstChild.firstChild.nodeValue == 'Heraldry and vexillology articles'){
     //Check that row has not already been added
    if(tables[i].rows[row].cells[0].innerHTML != html){
      var newRow = tables[i].insertRow(row);
      var x = newRow.insertCell(0);
      var y = newRow.insertCell(1);
      x.setAttribute("style",style);
      x.innerHTML = html;
      y.innerHTML = count;
    }
    //If row has been added but count has changed
    else if(tables[i].rows[row].cells[1].innerHTML != count){
      oldcount = tables[i].rows[row].cells[1].innerHTML;
      tables[i].rows[row].cells[1].innerHTML = count;
      //convert new count to difference, so the code for calculating the
      //total still works
      count -= oldcount;
    }
    else{
      return;
    }
  var lastRow = tables[i].rows.length - 1;
  var lastTotalCell = tables[i].rows[lastRow].cells[0];
  var lastTotal = parseInt(lastTotalCell.innerHTML.substring(6)) + count;
  lastTotalCell.innerHTML = 'Total: ' + lastTotal;
  alert(lastTotal);
  }
 }
 }

 addOnloadHook(function () {
if(document.location.pathname.match('/wiki/Wikipedia:WikiProject_Heraldry_and_vexillology/Assessment')){
  alert("page matched");
    loadXMLDoc("/wiki/Category:List-Class_heraldry_and_vexillology_articles",addListClass);
  }
 });