pagerank navogator, projet d'ext

// EXTENSION PAGERANK NAVIGATOR POUR FIREFOX
// basé sur pagerankstatus
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*
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function hexdec(str)
{
    return parseInt(str,16);
}

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*
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function zeroFill(a,b)
{
    var z = hexdec(80000000);
    if (z & a)
    {
        a = a>>1;
        a &= ~z;
        a |= 0x40000000;
        a = a>>(b-1);
    }
    else
    {
        a = a >> b;
    }
    return (a);
}

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*
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function mix(a,b,c)
{
    a -= b; a -= c; a ^= (zeroFill(c,13));
    b -= c; b -= a; b ^= (a<<8);
    c -= a; c -= b; c ^= (zeroFill(b,13));
    a -= b; a -= c; a ^= (zeroFill(c,12));
    b -= c; b -= a; b ^= (a<<16);
    c -= a; c -= b; c ^= (zeroFill(b,5));
    a -= b; a -= c; a ^= (zeroFill(c,3));
    b -= c; b -= a; b ^= (a<<10);
    c -= a; c -= b; c ^= (zeroFill(b,15));
    var ret = new Array((a),(b),(c));
    return ret;
}

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*
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function GoogleCH(url,length)
{
    var init = 0xE6359A60;
    if (arguments.length == 1)
      length = url.length;
    var a = 0x9E3779B9;
    var b = 0x9E3779B9;
    var c = 0xE6359A60;
    var k = 0;
    var len = length;
    var mixo = new Array();
    while(len >= 12)
    {
        a += (url[k+0] +(url[k+1]<<8) +(url[k+2]<<16) +(url[k+3]<<24));
        b += (url[k+4] +(url[k+5]<<8) +(url[k+6]<<16) +(url[k+7]<<24));
        c += (url[k+8] +(url[k+9]<<8) +(url[k+10]<<16)+(url[k+11]<<24));
        mixo = mix(a,b,c);
        a = mixo[0]; b = mixo[1]; c = mixo[2];
        k += 12;
        len -= 12;
    }
    c += length;
    switch(len)
    {
        case 11:
        c += url[k+10]<<24;
        case 10:
        c+=url[k+9]<<16;
        case 9 :
        c+=url[k+8]<<8;
        case 8 :
        b+=(url[k+7]<<24);
        case 7 :
        b+=(url[k+6]<<16);
        case 6 :
        b+=(url[k+5]<<8);
        case 5 :
        b+=(url[k+4]);
        case 4 :
        a+=(url[k+3]<<24);
        case 3 :
        a+=(url[k+2]<<16);
        case 2 :
        a+=(url[k+1]<<8);
        case 1 :
        a+=(url[k+0]);
    }
    mixo = mix(a,b,c);
    if (mixo[2] < 0)
    return (0x100000000 + mixo[2]);
    else
    return mixo[2];
}

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*
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function strord(string)
{
    var result = new Array();
    for(i=0;i<string.length;i++)
    {
        result[i] = string[i].charCodeAt(0);
    }
    return result;
}
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*
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function c32to8bit(arr32)
{
    var arr8 = new Array();
    for(i=0;i<arr32.length;i++)
    {
      for (bitOrder=i*4;bitOrder<=i*4+3;bitOrder++)
      {
            arr8[bitOrder]=arr32[i]&255;
            arr32[i]=zeroFill(arr32[i], 8);
        }
    }
    return arr8;
}
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*
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function myfmod(x,y)
{
   var i = Math.floor(x/y);
        return (x - i*y);
}

/************************************************************\
*
\************************************************************/
function GoogleNewCh(ch)
{
   ch = (((ch/7) << 2) | ((myfmod(ch,13))&7));

   prbuf = new Array();
   prbuf[0] = ch;
   for(i = 1; i < 20; i++) {
            prbuf[i] = prbuf[i-1]-9;
   }
   ch = GoogleCH(c32to8bit(prbuf), 80);
   return ch;

}

function URLencode(sStr)
{
	return encodeURIComponent(sStr).replace(/\+/g,"%2B").replace(/\//g,"%2F");
}
function requetePagerank(lien)
{
     var xhr_object = new XMLHttpRequest();
     xhr_object.open("GET", lien, false);
     xhr_object.send(null);
     if(xhr_object.readyState == 4) return(xhr_object.responseText);
}
function initPagerankStatus()
{	
	var htmlDocument = window._content.document;//définit la page en cours
	var liens = htmlDocument.getElementsByTagName("a");// récupère les liens
	
	for(j=0;j<liens.length;j++){
		
		var lienActuel=liens[j];
		var urlLienActuel = lienActuel.getAttribute("href");
	    
		var url = urlLienActuel;
		url = url.replace(/\?.*$/g,'?');
		
		var reqgr = "info:" + url;
		var reqgre = "info:" + URLencode(url);
		var gch = GoogleCH(strord(reqgr));
		gch = "6" + GoogleNewCh(gch);

		var querystring = "http://toolbarqueries.google.com/search?client=navclient-auto&ch=" + gch + "&features=Rank&q=" + reqgre;		
		
		//alert(querystring);//deconne juste avant
		var temp = requetePagerank(querystring);
		var foo = temp.match(/Rank_.*?:.*?:(\d+)/i);
		lienActuel.setAttribute("style", "font-size:"+(foo[1]*12)+"px");
	}
}
window.addEventListener("load",function() {initPagerankStatus();},true);