User:Lady Aleena/bracketmatch.js

Code that you insert on this page could contain malicious content capable of compromising your account. If you import a script from another page with "importScript", "mw.loader.load", "iusc", or "lusc", take note that this causes you to dynamically load a remote script, which could be changed by others. Editors are responsible for all edits and actions they perform, including by scripts. User scripts are not centrally supported and may malfunction or become inoperable due to software changes. A guide to help you find broken scripts is available. If you are unsure whether code you are adding to this page is safe, you can ask at the appropriate village pump.
This code will be executed when previewing this page.

Documentation for this user script can be added at User:Lady Aleena/bracketmatch.

Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.

// Modified from [[User:ais523/bracketmatch.js]] - Colour matching brackets in a copy of the edit box.
// for [[User:Lady_Aleena]]
// and then copied from [[User:Lady Aleena/bracketmatch.js]]
 
$(function(){
  if(mw.config.get('wgAction').toLowerCase() != "edit") return;
  var p = document.getElementById('permissions-errors') ?
    document.getElementById('viewsourcetext') :
    document.getElementById('wikiPreview')
  if(p) {
    div = document.createElement('div');
    div.setAttribute('id','bm_parseres');
    p.parentNode.insertBefore(div,p.nextSibling);
  }
  var b = document.getElementById('wpSave')
  if(b) {
    input = document.createElement('input');
    input.setAttribute('style','color:#006');
    input.setAttribute('type','button');
    input.setAttribute('value','Parse');
    input.addEventListener('click',bm_parsebrackets,false);
    b.parentNode.insertBefore(input,b);
  }
});
 
function bm_parsebrackets()
{
  var t=document.getElementById('wpTextbox1').value;
  var a=sajax_init_object();
  var p='action=expandtemplates&generatexml=1&format=json&callback=bm_callback&text='+encodeURIComponent(t);
  a.open('POST', mw.config.get('wgServer')+mw.config.get('wgScriptPath')+'/api.php');
  a.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  a.setRequestHeader("Content-length", p.length);
  a.setRequestHeader("Connection", "close");
  a.onreadystatechange=function(){bm_apirespond(a)};
  a.send(p);
}
 
function bm_apirespond(a)
{
  try
  {
    if(a.readyState==4)
      eval(a.responseText);
  }
  catch(e)
  {
    document.getElementById('bm_parseres').innerHTML=
      "Could not parse due to a server error. ";
  }
}
 
var colang;
 
function bm_hexdigit(n)
{
  var i=Math.floor(n);
  if(i<10) return i+'';
  if(i==10) return 'A';
  if(i==11) return 'B';
  if(i==12) return 'C';
  if(i==13) return 'D';
  if(i==14) return 'E';
  if(i==15) return 'F';
}
 
function bm_tohex(n)
{
  var i=Math.floor(n);
  return bm_hexdigit(i/16)+bm_hexdigit(i%16);
}
 
function bm_gencol(ang)
{
  var r=Math.sin(ang)+1;
  var g=Math.sin(ang+3.14159*2/3)+1;
  var b=Math.sin(ang-3.14159*2/3)+1;
  return bm_tohex(r*127.5)+bm_tohex(g*127.5)+bm_tohex(b*127.5);
}
 
function bm_callback(o)
{
  var subs={"tplarg":"{{{",
            "/tplarg":"}}}",
            "template":"{{",
            "/template":"}}",
            "part":"|",
            "ext":"&"+"lt;",
            "/attr":"&"+"gt;",
            "attr/":"&"+"gt;"};
  var h=o.parsetree["*"].split("<");
  var i=h.length;
  var r;
  var n;
  var sp=0;
  var st=new Array();
  var col;
  colang=0;
  while(--i)
  {
    col="";
    n=1;
    h[i]=h[i].split(">");
    h[i][0]=h[i][0].split(" ");
    r=subs[h[i][0][0]];
    if(r==undefined) r="";
    if(r=='}}}'||r=='}}')
    {
      st[sp]=bm_gencol(colang);
      col=st[sp];
      sp++;
      colang+=2.4; //golden angle in radians, approx
    }
    else if(r=='{{{'||r=='{{')
    {
      sp--;
      col=st[sp];
      n=2;
    }
    if(col!="")
      r="<font color='#"+col+"' id='bm_f"+col+n+"' onclick='bm_highlight(\""+col+"\",\"black\")'>"+r+"</font>";
    h[i][0]=r;
    h[i]=h[i].join("");
  }
  document.getElementById('bm_parseres').innerHTML=
    "<div style='border:1px solid blue'><tt>"+h.join("").split("\n").join("<br />")+
    "</tt></div><div></div>";
}
 
function bm_highlight(x,c)
{
  document.getElementById('bm_f'+x+'1').style.backgroundColor=c;
  document.getElementById('bm_f'+x+'2').style.backgroundColor=c;
  if(c=="black")
    window.setTimeout("bm_highlight('"+x+"','transparent')",3000);
}