wgfrwikibooks_Gadget_EditIndexJsVersion = "20140114001";

function ajoutBoutonEditIndex()
{
    var toolbar = document.getElementById('toolbar');
    if (!toolbar) return false;

    var textbox = document.getElementById('wpTextbox1');
    if (!textbox) return false;

    if (!document.selection && textbox.selectionStart == null) return false;

    {
        var image = document.createElement("img");
        image.width = 23*3;
        image.height = 22;
        image.src = url_wpcm+"d/df/Btn_toolbar_index_edit.png";
        image.border = 0;
        image.alt = image.title = "Modifier le nombre d'éléments et le facteur multiplicateur du modèle Index à la position du curseur";
        image.style.cursor = "pointer";
        image.onclick = new Function( "editIndexPage();return false;" );
        toolbar.appendChild(image);
    }
}

if (!window.wgIsScriptPage) // pas sur une page de script (*.js, *.css)
    addOnloadHook(ajoutBoutonEditIndex);


function phi(n)
{
    var p = 2;
    var r = 1;
    while (p<n)
    {
        if ((n%p)==0)
        {
            r *= p-1; n/=p;
            while ((n%p)==0)
            { r *= p; n/=p; }
        }
        p++;
    }
    return r;
}
 
function pgcd(a,b)
{
    for(;;)
    {
        if (a==0) return b;
        b %= a;
        if (b==1) return 1;
        if (b==0) return a;
        a %= b;
        if (a==1) return 1;
    }
}
 
function indexMensuel(date)
{ return date.getUTCMonth()+1+12*date.getUTCFullYear(); }
 
function indexJour(date, period)
{
var y=date.getUTCFullYear()
var m=date.getUTCMonth()+1
date.getUTCDate()
if (m<3) { y--; m+=12; }
return Math.floor((365*y+Math.floor(y/4)-Math.floor(y/100)+Math.floor(y/400)+date.getUTCDate()+Math.floor((153*m+8)/5))/period);
}
 
function changeTotal(newtotal, newfactor, p)
{
    var now = new Date();
    var num = p.template(now, p.period);
    var n = ((num+p.offset)*p.factor) % p.total;
 
    p.total = newtotal;
    p.offset %= newtotal;
    p.factor = newfactor % newtotal;
    if (p.factor==0) p.factor = 1;
    else while (pgcd(p.factor, newtotal)!=1)
    {
        p.factor++;
        if (p.factor>=newtotal) p.factor = 1;
    }
 
    if (n<newtotal)
    {
        while ( (((num+p.offset)*p.factor) % p.total) != n)
            p.offset = (p.offset+1)%p.total;
    }
}
 
function editIndexPage()
{
    var ta = $('#wpTextbox1');
    var p = ta.getCursorPosition();
    var t = ta.val();
 
    // find start & end
    var ps = p;
    while (ps+1<t.length && ( /[\{]/.test(t.charAt(ps)) )) ps++;
    while (ps>0 && ( /[A-Za-z0-9\}\|]/.test(t.charAt(ps-1)) )) ps--;
    if (ps<2 || (t.substring(ps-2,ps)!='{{'))
      { alert("Pas de modèle d'index trouvé à la position du curseur.");return; }
    var pe = ps;
    while (pe+1<t.length && ( /[A-Za-z0-9\|]/.test(t.charAt(pe)) )) pe++;
    if (pe+2>t.length || (t.substring(pe,pe+2)!='}}'))
      { alert("Pas de modèle d'index trouvé à la position du curseur.");return; }
    var params = t.substring(ps,pe).split("|");
    var aa = { factor:1,offset:0,period:1 };
    if (params[0]=='IndexJour') aa.template=indexJour;
    else if (params[0]=='IndexMensuel') aa.template=indexMensuel;
    else { alert("Pas de modèle d'index trouvé à la position du curseur.");return; }
    aa.total  = params.length>1?parseInt(params[1]):1;
    aa.factor = params.length>2?parseInt(params[2]):1;
    aa.offset = params.length>3?parseInt(params[3]):0;
    aa.period = params.length>4?parseInt(params[4]):1;
    var ntotal=aa.total, nfactor=aa.factor;
    for(;;)
    {
      var inp = prompt('Nouveau nombre total de pages * facteur',''+ntotal+' * '+nfactor);
      if (inp===null) return;
      var minp = inp.match(/^[ \t]*([0-9]+)[ \t]*$/);
      if (minp!==null)
      {
        ntotal=parseInt(minp[1]);
        if (ntotal>0) break;
      }
      minp = inp.match(/^[ \t]*([0-9]+)[ \t]*[\*][ \t]*([0-9]+)[ \t]*$/);
      if (minp!==null)
      {
        ntotal=parseInt(minp[1]);
        nfactor=parseInt(minp[2]);
        if (ntotal>0 && nfactor>0) break;
      }
    }
    changeTotal(ntotal, nfactor, aa);
    var tmp = t.substring(0,ps+params[0].length)+'|'+aa.total;
    if (params[0]=='IndexJour' && aa.period!=1) tmp += '|'+aa.factor+'|'+aa.offset+'|'+aa.period;
    else if (aa.offset!=0) tmp += '|'+aa.factor+'|'+aa.offset;
    else if (aa.factor!=1) tmp += '|'+aa.factor;
    tmp += t.substring(pe);
    ta.val(tmp);
    ta.setCursorPosition(p);
}