MediaWiki:Formatter.js

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// Formatter (from WikiProjects UserScripts)
 
function format() {
    var txt = document.editform.wpTextbox1;
    txt.value = catFixer(txt.value);
    txt.value = entities(txt.value);
    txt.value = fixheadings(txt.value);
    txt.value = fixsyntax(txt.value);
    txt.value = linkfixer(txt.value, false);
    //txt.value = imagefixer(txt.value);
    txt.value = whitespace(txt.value);
    txt.value = linksimplifyer(txt.value);
    txt.value = trim(txt.value);
}
 
function whitespace(str){
    str = str.replace(/\t/g, " ");
 
    str = str.replace(/^ ? ? \n/gm, "\n");
    str = str.replace(/(\n\n)\n+/g, "$1");
    str = str.replace(/== ? ?\n\n==/g, "==\n==");
    str = str.replace(/\n\n(\* ?\[?http)/g, "\n$1");
 
    str = str.replace(/^ ? ? \n/gm, "\n");
    str = str.replace(/\n\n\*/g, "\n*");
    str = str.replace(/[ \t][ \t]+/g, " ");
    str = str.replace(/([=\n]\n)\n+/g, "$1");
    str = str.replace(/ \n/g, "\n");
 
    //* bullet points
    str = str.replace(/^([\*#]+) /gm, "$1");
    str = str.replace(/^([\*#]+)/gm, "$1 ");
 
    //==Headings==
    str = str.replace(/^(={1,4}) ?(.*?) ?(={1,4})$/gm, "$1$2$3");
 
    //dash — spacing
    str = str.replace(/ ?(–|&#150;|&ndash;|&#8211;|&#x2013;) ?/g, "$1");
    str = str.replace(/ ?(—|&#151;|&mdash;|&#8212;|&#x2014;) ?/g, "$1");
    str = str.replace(/([^1-9])(—|&#151;|&mdash;|&#8212;|&#x2014;|–|&#150;|&ndash;|&#8211;|&#x2013;)([^1-9])/g, "$1 $2 $3");
 
    return trim(str);
}
 
function entities(str){
    //str = str.replace(//g, "");
    str = str.replace(/&#150;|&#8211;|&#x2013;/g, "&ndash;");
    str = str.replace(/&#151;|&#8212;|&#x2014;/g, "&mdash;");
   // str = str.replace(/(cm| m|km|mi)<sup>2</sup>/g, "$1²");
    str = str.replace(/&sup2;/g, "²");
    str = str.replace(/&deg;/g, "°");
 
    return trim(str);
}
 
//Fix ==See also== and similar section common errors.
function fixheadings(str)
{
  if( !str.match(/= ?See also ?=/) )
    str = str.replace(/(== ?)(see also:?|related topics:?|related articles:?|internal links:?|also see:?)( ?==)/gi, "$1See also$3");
 
  str = str.replace(/(== ?)(external links?:?|outside links?|web ?links?:?|exterior links?:?)( ?==)/gi, "$1External links$3");
  str = str.replace(/(== ?)(references?:?)( ?==)/gi, "$1References$3");
  str = str.replace(/(== ?)(sources?:?)( ?==)/gi, "$1Sources$3");
  str = str.replace(/(== ?)(further readings?:?)( ?==)/gi, "$1Further reading$3");
 
  return str;
}
 
function catFixer(str){
    str = str.replace(/\[\[ ?[Cc]ategory ?: ?/g, "[[Category:");
 
    return trim(str);
}
 
//fixes many common syntax problems
function fixsyntax(str)
{
  //replace html with wiki syntax
  if( !str.match(/'<\/?[ib]>|<\/?[ib]>'/gi) )
  {
    str = str.replace(/<i>(.*?)<\/i>/gi, "''$1''");
    str = str.replace(/<b>(.*?)<\/b>/gi, "'''$1'''");
  }
  str = str.replace(/<br\/>/gi, "<br />");
  str = str.replace(/<br>/gi, "<br />");
 
  return trim(str);
}
 
//formats links in standard fashion
function linkfixer(str, checkImages)
{ 
  str = str.replace(/\]\[/g, "] [");
  var m = str.match(/\[?\[[^\]]*?\]\]?/g);
  if (m)
  {
    for (var i = 0; i < m.length; i++)
    {
      var x = m[i].toString();
      var y = x;
 
      //internal links only
      if ( !y.match(/^\[?\[http:\/\//i) && !y.match(/^\[?\[image:/i) )
      {
        if (y.indexOf(":") == -1 && y.substr(0,3) != "[[_" && y.indexOf("|_") == -1)
        {
          if (y.indexOf("|") == -1)
            y = y.replace(/_/g, " ");
          else
            y = y.replace( y.substr(0, y.indexOf("|")), y.substr(0, y.indexOf("|")).replace(/_/g, " "));
        }  
 
        y = y.replace(/ ?\| ?/, "|").replace("|]]", "| ]]");
 
      }
 
      str = str.replace(x, y);
    }
  }
 
  //repair bad internal links
  str = str.replace(/\[\[ ?([^\]]*?) ?\]\]/g, "[[$1]]");
  str = str.replace(/\[\[([^\]]*?)( |_)#([^\]]*?)\]\]/g, "[[$1#$3]]");
 
  //repair bad external links
  str = str.replace(/\[?\[http:\/\/([^\]]*?)\]\]?/gi, "[http://$1]");
  str = str.replace(/\[http:\/\/([^\]]*?)\|([^\]]*?)\]/gi, "[http://$1 $2]");
 
  return trim(str);
}
 
//fixes images
function imagefixer(str)
{
 
  //remove external images
  str = str.replace(/\[?\[image:http:\/\/([^\]]*?)\]\]?/gi, "[http://$1]");
 
  //fix links within internal images
  var m = str.match(/\[?\[image:[^\[\]]*?(\[?\[[^\]]*?\]*?[^\[\]]*?)*?\]+/gi);
  if (m)
  {
    for (var i = 0; i < m.length; i++)
    {
      var x = m[i].toString();
      var y = x;
 
      y = y.replace(/^\[\[i/i, "I").replace(/\]\]$/, "");
      y = y.replace(/(\[[^\]]*?)$/, "$1]");
      y = linkfixer(y, true);
      y = "[[" + y + "]]";
 
      str = str.replace(x, y);
    }
  }
 
  return trim(str);
}
 
//simplifies some links e.g. [[Dog|dog]] to [[dog]] and [[Dog|dogs]] to [[dog]]s
function linksimplifyer(str){
  var m = str.match(/\[\[([^[]*?)\|([^[]*?)\]\]/g);
  if (m)
  {
    for (var i = 0; i < m.length; i++)
    {
      var n_arr = m[i].toString().match(/\[\[([^[]*?)\|([^[]*?)\]\]/);
      var n = n_arr[0];
      var a = n_arr[1];
      var b = n_arr[2];
 
      if (b.indexOf(a) == 0 || b.indexOf(TurnFirstToLower(a)) == 0)
      {
        var k = n.replace(/\[\[([^\]\|]*?)\|(\1)([\w]*?)\]\]/i, "[[$2]]$3");
        str = str.replace(n, k);
      }
    }
  }
 
  str = str.replace(/\[\[([^\]\|]+)\|([^\]\|]+)\]\]([A-Za-z\'][A-Za-z]*)([\.\,\;\:\"\!\?\s\n])/g, "[[$1|$2$3]]$4"); // ' // Help the syntax highlighter...
 
  return str;
}
 
//trim start and end, trim spaces from the end of lines
function trim(str) {
   str = str.replace(/ $/gm, "");
   return str.replace(/^\s*|\s*$/g, "");
}
 
//turns first character to lowercase
function TurnFirstToLower(input) {
  if (input != "")
  {
    var input = trim(input);
    var temp = input.substr(0, 1);
    return temp.toLowerCase() + input.substr(1, input.length);
  }
  else
    return "";
}
 
//entities that should never be unicoded
function noUnicodify(str) {
  str = str.replace(" &amp; ", " & ");
  str = str.replace("&amp;", "&amp;amp;").replace("&amp;lt;", "&amp;amp;lt;").replace("&amp;gt;", "&amp;amp;gt;").replace("&amp;quot;", "&amp;amp;quot;").replace("&amp;apos;", "&amp;amp;apos;");
  str = str.replace("&minus;", "&amp;minus;").replace("&times;", "&amp;times;");
 
  str = str.replace("&nbsp;", "&amp;nbsp;").replace("&thinsp;", "&amp;thinsp;").replace("&shy;", "&amp;shy;");
  str = str.replace("&prime;", "&amp;prime;");
  str = str.replace(/&(#0?9[13];)/, "&amp;$1");
  str = str.replace(/&(#0?12[345];)/, "&amp;$1");
 
  return str;
}
 
// end Formatter