//  Fix hyphens, dashes, and minus signs per [[MOS:DASH]].

//

//  See talk page for instructions.

//

//  The user can disable these conversions by putting "nodashes" somewhere

//  in the text — either temporarily or permanently.  You can similarly add

//  "scores" if the score-detection heuristic doesn't trigger automatically.

//

//  This tool can be used standalone until it is added to AutoEd and wikEd.

//  This module should follow unicodify.js if it is used.

//  Testing page is at [[User:GregU/dashes.js/tests]].

//  Please report false positives on the talk page.



function autoEdDashes (str)

{

  if (str.search(/nodashes/i) >= 0)

    return str;



  var scpat = /\bscores?\b|\[\[Category:.*\b(sport|athlet|players|teams|games|league|champion|tournament|competit|cup\b|\w+ball\b|hockey|lacrosse|cricket|rugby|tennis|golf|polo|boxing|boxers|martial.art|chess)/i;

  var scoresAreLikely = (str.search(scpat) >= 0);



  // Ensure the replacement isn't a link such as [[FOO - BAR]] before

  // replacing it, so that we don't break the link. But we do want to

  // replace dashes used in the right-side label part of links.  Also,

  // don't break templates, URLs, DOIs, {{#expr:}}, <math> equations,

  // source code, or <ref name="13-70">.

  //

  function ifNotLink (str)

  {

    var pos    = arguments arguments.length - 2 ];

    var string = arguments arguments.length - 1 ];



    var pat = /\[\[[^|\]]*$|\{\{[^|}]*$|[:\/%][^\s|>]+$|<[^>]*$|#\w*expr:.*$/i;

    if (string.substring(pos-260,pos+1).search(pat) >= 0)

        return str;             // it's a link, so don't change it



    var pat2 = /\{\{(main|see|detail|about|for\b|other|redir|conv|coor|sort|anchor|DNB(?: [Cc]ite|)|[Cc]ite DNB)[^}]*$/i;

    if (string.substring(pos-260,pos+1).search(pat2) >= 0)

        return str;             // likely templates with page-name or neg params

        

    var pat3 = /\|\s*(CAS_number)\s*=\s*/i;

    if (string.substring(pos-260,pos+1).search(pat3) >= 0)

        return str;             // drugbox CAS_number

        

    var pat4 = /\|\s*(doi|isbn)\s*=\s*/i;

    if (string.substring(pos-260,pos+1).search(pat4) >= 0)

        return str;             // doi or isbn



    var m = string.slice(pos).search(/<\/?(math|pre|code|tt|source|syntaxhighlight|gallery)\b/i);

    if (m >= 0 && string.charAt(pos+m+1) == '/')

        return str;             // don't break a <math> equation, or source code



    if (string.slice(pos).search(/^[^|{}[\]<>\n]*\.([a-z]{3,4}\s*[|}]|jpg|png|svg)|^.*hyphen/i) >= 0)

        return str;             // it's a file name parameter, or <!--sic hyphen-->



    if (str.search(/[ |(>][-–]\b/) >= 0)

        return str.replace(/[-–]/, "−");       // minus sign

    else

        return str.replace(/--+\b/g, "—") . replace(/[-–−]+/g, "–");     // dash

  }



  str = str.replace(/\s--?\s/g, ifNotLink);                 // en dash looks better

  str = str.replace(/[a-z\d]---?[a-z\d]/ig, ifNotLink);     // em dash

  str = str.replace(/\d\d\d]*}*[-−](present|current)\b/ig, ifNotLink);       // 1973-present

  str = str.replace(/[^\w−-](18|19|20)\d\d]*}*[-−][^\w−-]/g, ifNotLink);     // (1973-)

  str = str.replace(/\d(s|%|\?|''')[-−]\d/g, ifNotLink);    // 1950s-1960s, 40%-50%

  str = str.replace(/\d[-−](\$|'+)\d/g, ifNotLink);         // $40-$50, 7-'''4''', '49-'53

  str = str.replace(/[½⅓⅔¼¾⅛⅜⅝⅞]%?[-−][\d½⅓⅔¼¾⅛⅜⅝⅞]/g, ifNotLink);           // 3½-6

  str = str.replace(/\d(st|nd|rd|th)?[-−]\d+(st|nd|rd|th)\b/g, ifNotLink);   // 2nd-3rd



  str = str.replace(/([a-z,'"”\]>] +|\(|^\| *|\|\| *)[-–]\d/mig, ifNotLink);   // minus -35

  str = str.replace(/<((sup|sub|td)>\s*)[-–](\d)/ig, "<$1−$3");         // 10<sup>-3</sup>

  str = str.replace(/,*(?=.? ) *[-–—−] *(\d*:\d\d[\s*<])/g, " – $1");   // album track listings



  // November 15, 2005-March 7, 2006; [[March 18]]-[[April 4]]

  str = str.replace(/(\d\]*)[-–—−](\[*(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z]* +\d)/g, "$1 – $2");

  // July-August 2007

  str = str.replace(/\b((Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)[a-z]*[-−]?\b){2,}/g, ifNotLink);

  // [[266]]-[[283]]

  str = str.replace(/(\d(?: BC)?\]\])[-−]((ca?\.|AD ?)?\[\[\d+[^\d-])/g, "$1–$2");

  // (1984 – 1992)

  str = str.replace(/([(|=] *\[*\d+\]*) +[–—−] +(\[*\d+\]*\s*[)|}])/g, "$1–$2");

  // iv-xii

  str = str.replace(/[ ;(=](?=\w+-)(m*(cm|cd|d?c*)(xc|xl|l?x*)(ix|iv|v?i*)-?\b){2}[^\w-]/g, ifNotLink);



  if (scoresAreLikely)      // W-L-D or 73–70–67–70=280, but not castling

    str = str.replace(/[^\w−–-](?!0-0-0)(\d\d?\d?[-–−]){2,}\d\d?[^\w\/−–-]/g, ifNotLink);



  str = str.replace(/\b(\d+)[–−](year|month|day|hour|minute|mile|yard|foot|inch|bit|door|speed|gun|page|seat|way|point|ton|man)\b/g, "$1-$2");     // hyphen



  // Number ranges and scores should use en dashes, per [[MOS:DASH]].

  // This has been well-tested and false positives (e.g., ID nos.) are rare.

  //

  function range (str, from,to, pos,string)

  {

    var dash   = true;

    var except = /\b(fig(ure)?|table|example|exhibit|circular|section|part|number|no|nr|id|model|pub|std|report|rpt|law|[P.]L|p|page|date|IS\wN\b[ a-z]*|SCOTUS)[^\w(,;]*$/i;

    var rpat   = /^([^A-Za-z]|nbsp)*(AD|BC|B?CE|BP|[kMG]a|km|mi|kg|lb|\w?Hz|vote|decision|record|odds|scor\w*|win|loss|tie|draw|lead|victory|defeat|upset|run|deficit|start|finish|season|game)\b/;

    var lpat   = /\b(pages|pp|rp|nos|\d+\)?'*[:,]|(w[io]n|lost?|tie|dr.w|lea?d|f.ll|vot|rul|decid|pass|fail|defeat|scor|gam|match|trail|finish|end)e?[ds]?|\w\w+ing|ahead|behind|up|down|from|to|is|are|was|were|of|out|by|an?|at|it|went|go|gone|beaten|between)([^a-z]|nbsp)*$/i;

    var inorder   = (to-0 > from.slice(-to.length));     // pp 362-5

    var precision = Math.max( from.search(/0*$/), to.search(/0*$/) );



    if (string.substring(pos-20,pos+1).search(except) >= 0) {

        return str;      // based on preceding word, looks like a ref number

    }

    if (from == 9 && to == 11) {

        dash = false;    // 9-11 is a common special case

    }

    if (from-0 >= to) {

        dash = false;    // values don't look like a range

    }

    if (to-from > 120 && from * (precision > 2 ? 5 : 50) < to && from > 1) {

        dash = false;    // values don't look like a range

    }

    if (scoresAreLikely && from <= 900 && to <= 900) {

        dash = true;     // likely a score or wins-losses

    }

    if (from < 2-to && string.search(/Category:.*\bChess\b/i) >= 0) {

        dash = false;    // chess notations 0-0, 0-1, 1-0

    }

    if (str.charAt(0) == '(' && string.charAt(pos + str.length) == ')') {

        dash = true;     // scores often seen as (8-4)

    }

    if (from.search(/^0./) >= 0 || to.search(/^0./) >= 0) {

        dash = false;    // 3-07 and 0123-4567 look like ref numbers

    }

    if (string.substr(pos-1,15).search(/^\d([:,.])\d+.\d+\1\d/) >= 0) {

        dash = true;     // 10:30-11:30, 35,000-40,000, 2.5-4.0

    }

    if (string.substr(pos,30).search(rpat) >= 0) {

        dash = true;     // 12-5 BC, 5-5000&nbsp;km, 6-4 win, 73-50 vote

    }

    if (string.substring(pos-80,pos).search(lpat) >= 0) {

        dash = true;     // pp.&nbsp;8, 25, 270-74, 313-7; won 6-4, 6-2

    }

    if (from > 1000 && from < 2100 && to.length == 2 && inorder) {

        dash = true;     // 1994-95 year range

    }

    return dash ? ifNotLink(str,pos,string) : str;

  }



  str = str.replace(/[^\w\/+−–-](\d{1,4})[-−](\d{1,4})(?!'*[\w\/+−–-])/g, range);



  return str;

}





//  Hook to allow using this tool "standalone"



if (importScript("Wikipedia:AutoEd/core.js"))   // if not otherwise using AutoEd

{

    function autoEdFunctions() {

        var txt = document.editform.wpTextbox1;

        var str = txt.value.

                  replace(/&mdash;/g, '—').

                  replace(/&ndash;/g, '–').     // simplify core regexes

                  replace(/&minus;/g, '−');

        var newstr = autoEdDashes( str );

        if (newstr != str) {         // don't alter encoding style if no fixes

            txt.value = newstr;

            autoEdTag = "fixed [[MOS:DASH|dashes]] using a [[User:GregU/dashes.js|script]]";

        }

    }

    autoEdLinkName  = "–";

    autoEdLinkHover = "Fix dashes, hyphens, and minus signs";

    autoEdTag       = "";

}