Gebruiker:Valhallasw/highlightredirects.js

var highlightRedirects = {
 
 tab_redirects : null,
 status: null,
 xhr : null,
 todo : null,
 num : { total:0, done:0, redir:0 },

 //
 // Try to create an XMLHTTP request object for each tile
 // with maximum browser compat.
 // code adapted from http://jibbering.com/2002/4/httprequest.html
 //
 createXMLHTTP : function()
 {
  var i, xhr;

  /*@cc_on @*/
  /*@if (@_jscript_version >= 5)
  // Internet Explorer (uses Conditional compilation)
  // traps security blocked creation of the objects.
   wmaDebug('Microsoft section');
   try {
    xhr = new ActiveXObject("Msxml2.XMLHTTP");
   } catch (e) {
    try {
     xhr = new ActiveXObject("Microsoft.XMLHTTP");
    } catch (E) {
     xhr = false;
    }
   }
  @end @*/

  // Firefox, Konqueror, Safari, Mozilla
  if (!xhr && typeof(XMLHttpRequest) != 'undefined') {
   try {
    xhr = new XMLHttpRequest();
   } catch (e) {
    xhr = false;
   }
  }

  // ICE browser
  if (!xhr && window.createRequest) {
   try {
    xhr = new window.createRequest();
   } catch (e) {
    xhr = false;
   }
  }

  return xhr;
 },

 updateStatus : function()
 {
  with( highlightRedirects )
  {
   status.nodeValue = ' (' + num.redir + '/' + num.done + '/' + num.total + ')';
  }
 },

 // cross-browser event attachment (John Resig)
 // http://www.quirksmode.org/blog/archives/2005/10/_and_the_winner_1.html
 addEvent : function ( obj, type, fn )
 {
  if (obj.addEventListener)
   obj.addEventListener( type, fn, false );
  else if (obj.attachEvent)
  {
   obj["e"+type+fn] = fn;
   obj[type+fn] = function() { obj["e"+type+fn]( window.event ); }
   obj.attachEvent( "on"+type, obj[type+fn] );
  }
 },

 run : function()
 {
  var links = document.getElementById('bodyContent').getElementsByTagName('a');
  var local = window.location.href + '#'
 
  if( highlightRedirects.todo != null ) return;

  highlightRedirects.todo = new Array();

  for( var key in links )
  {
   if( links[key].href && 
       links[key].pathname &&
       links[key].pathname.substr(0,6) == '/wiki/' &&
       !( links[key].href.substr(0,local.length) == local ) &&
       !( links[key].pathname.substr(6,8) == 'Special:' ) )
   {
    highlightRedirects.todo[highlightRedirects.num.total] =
    {
     link : links[key],
     xhr  : highlightRedirects.createXMLHTTP(),
     func : new Function(
       'var me = highlightRedirects.todo['+highlightRedirects.num.total+'];' + 
       'if(me.xhr.readyState==4) {' +
        'var ro=eval("("+me.xhr.responseText+")");' +
        'var redir=false;' +
        'for( var k in ro.query.pages ) {' + 
         'if( typeof(ro.query.pages[k].redirect) != "undefined" ) redir=true;' +
        '}' +
        'if(redir) {' + 
         'me.link.style.color="green";' +
         'highlightRedirects.num.redir++;' +
        '}' + 
        'else me.link.style.color="blue";' +
        'highlightRedirects.num.done++; highlightRedirects.updateStatus();' +
       '}' 
     )
    }

    links[key].style.color = 'gray';

    with(highlightRedirects.todo[highlightRedirects.num.total])
    {
     xhr.open("GET", 
      "/w/api.php?action=query&prop=info&format=json&titles=" +
      links[key].pathname.substr(6), true);

     xhr.onreadystatechange = func;
     xhr.send( null ); 
    }

    highlightRedirects.num.total++;
   }
  }
 },

 install : function()
 {
  with(highlightRedirects)
  {
   tab_redirects = document.createElement('li');
   tab_redirects.style.cursor = 'pointer';
   tab_redirects.style.padding = '0pt 0.8em 0pt 0.8em';
   tab_redirects.style.color = 'blue';

   status = document.createTextNode('');
   tab_redirects.appendChild( document.createTextNode('redirects') );
   tab_redirects.appendChild( status );

   if( document.getElementById('ca-history') ) 
    document.getElementById('ca-history').parentNode.appendChild( tab_redirects  );

   addEvent( tab_redirects, 'click', run );
  }
 }

};

//
// Hook up installation function
//
$(highlightRedirects.install);