Wikipedia:WikiProject User scripts/Scripts/livepreview.js

// Last update: 10 Sep 2005 // by Lupin (some demunging and commenting) based on Pilaf's version of // 21:51, 15 Feb 2005 (UTC)

// Script to embed Live Preview in MediaWiki's edit page function LivePreviewInstall { copywarn = document.getElementById('editpage-copywarn'); if (copywarn != null) { var cleaner = ""; LivePreviewHTML = ''; LivePreviewHTML += ' '; copywarn.innerHTML = LivePreviewHTML + copywarn.innerHTML; } }

// User options var wpUserName=wpUserName||'Wikipedian'; var wpUserSignature=wpUserSignature||wpUserName; var wpShowImages=wpShowImages||true;

// System options var wpLanguageCode=wpLanguageCode||'en'; var wpInterwikiCodes=wpInterwikiCodes||'ab|aa|af|ak|sq|als|am|ang|ar|an|arc|hy|roa-rup|as|ast|av|ay|az|bm|ba|eu|be|bn|bh|bi|bs|br|bg|my|ca|ch|ce|chr|chy|ny|zh|zh-tw|zh-cn|cho|cv|kw|co|cr|hr|cs|da|dv|nl|dz|en|eo|et|ee|fo|fj|fi|fr|fy|ff|gl|ka|de|got|el|kl|gn|gu|ht|ha|haw|he|hz|hi|ho|hu|is|io|ig|id|ia|ie|iu|ik|ga|it|ja|jv|kn|kr|csb|ks|kk|km|ki|rw|rn|tlh|kv|kg|ko|kj|ku|ky|lo|la|lv|li|ln|lt|jbo|nds|lg|lb|mk|mg|ms|ml|mt|gv|mi|minnan|mr|mh|zh-min-nan|mo|mn|mus|nah|na|nv|ne|se|no|nn|oc|or|om|pi|fa|pl|pt|pa|ps|qu|ro|rm|ru|sm|sg|sa|sc|gd|sr|sh|st|tn|sn|scn|simple|sd|si|sk|sl|so|st|es|su|sw|ss|sv|tl|ty|tg|ta|tt|te|th|bo|ti|tpi|to|tokipona|ts|tum|tr|tk|tw|uk|ur|ug|uz|ve|vi|vo|wa|cy|wo|xh|ii|yi|yo|za|zu'; var wpBaseArticlePath=wpBaseArticlePath||'/wiki/'; var wpMathBasePath=wpMathBasePath||'/math/'; var wpImageBasePath=wpImageBasePath||'http://upload.wikimedia.org/wikipedia/'+wpLanguageCode+'/'; var wpImageFallbackPath=wpImageFallbackPath||'http://upload.wikimedia.org/wikipedia/commons/'; var wpDefaultThumbWidth=wpDefaultThumbWidth||180; var wpSkinMagnifyClip=wpSkinMagnifyClip||'/skins/common/images/magnify-clip.png'; var wpUserNamespace=wpUserNamespace||'User'; var wpImageNamespace=wpImageNamespace||'Image'; var wpCategoryNamespace=wpCategoryNamespace||'Category';

// Somewhat unpacked code function wiki2html(str) { str=strip_cr(str); var w=new WikiCode; w.lines=str.split(/\n/); w.parse; return w.html; };

// Wikipedian var wpSignature=+wpUserSignature+;

// [[Image:summat|frame (must include a pipe) var wpBlockImage=new RegExp('^\\[\\['+wpImageNamespace+                           ':.*?\\|.*?(?:frame|thumbnail|thumb|none|right|left|center)',                            'i'); function WikiCode {  this.lines=new Array;  this.html=new String;

this._endline=function(str) { this.html+=str; this.lines.shift; };

this.parse=function { var p=false; do { if (h_match=this.lines[0].match(/^(={1,6})(.*)\1(.*)$/)) { // heading: === foo === bar // BUG: bar passes through without being dewikified // eg === foo === bar p=false; this._endline(''+_parse_inline_nowiki(h_match[2])+                     ''+h_match[3]); } else if (this.lines[0].match(/^[*#:;]/)) { // list element p=false; this._parse_list; } else if (this.lines[0].charAt(0)==' ') { // pre (indicated by leading whitespace) p=false; this._parse_pre; } else if (this.lines[0].substr(0,2)=='{|') { // start of wikitable p=false; this._parse_table; } else if (this.lines[0].match(/^+$/)) { // hr        p=false; this._endline(' '); } else if (this.lines[0].match(wpBlockImage)) { // block image p=false; this._parse_block_image; } else { /* fallthrough */ if (this.lines[0]=='') { // blank line if ( p=(this.lines.length>1 && this.lines[1]=='') ) { // two blank lines, not at the end this._endline(' ');} } else { if (!p) { this.html+=' '; p=true; }         this.html+=_parse_inline_nowiki(this.lines[0])+' '; }       this.lines.shift; } /* end fallthrough */ } while (this.lines.length); }; /* end this.parse */

this._parse_list=function { // called when first line matches /^[*#:;]/ var prev=new String; var l_match,imatch,dt_match; while (this.lines.length && (l_match=this.lines[0].match(/^([*#:;]+)(.*)$/))) { this.lines.shift; imatch=str_imatch(prev,l_match[1]); for(var i=prev.length-1;i>=imatch;i--) { if (prev.charAt(i)=='*') { this.html+=''; } else if (prev.charAt(i)=='#') { this.html+=''; } else { this.html+=''; switch(l_match[1].charAt(i)) { case'':case'*':case'#': this.html+=''; }       }      }      for(var i=imatch;i'; } else if (l_match[1].charAt(i)=='#') { this.html+=''; } else { switch(prev.charAt(i)) { case'':case'*':case'#': this.html+=''; }         this.html+=''; }     }      switch(l_match[1].charAt(l_match[1].length-1)) { case'*':case'#': this.html+=''+_parse_inline_nowiki(l_match[2]); break; case';': if (dt_match=l_match[2].match(/(.*?) (:.*?)$/)) { this.html+=_parse_inline_nowiki(dt_match[1]); this.lines.unshift(dt_match[2]); break; }       case':': this.html+=_parse_inline_nowiki(l_match[2]); }     prev=l_match[1]; } /* while */ for(i=prev.length-1;i>=0;i--) { if (prev.charAt(i)=='*') { this.html+=''; } else if (prev.charAt(i)=='#') { this.html+=''; } else { this.html+='</d'+((prev.charAt(i)==';')?'t':'d')+'></dl>'; }   }  }; /* end this._parse_list */ this._parse_table=function { var table_match; if (table_match=this.lines[0].match(/^\{\|( .*)$/)) { this._endline(' '); return; case'-': this._endline('<tr '+this.lines[0].match(/\|-*(.*)/)[1]+'>'); break; default: this._parse_table_data; }     } else if (this.lines[0].charAt(0)=='!') { this._parse_table_data; } else { this.lines.shift; }   } while (this.lines.length) }; /* end this._parse_table */

this._parse_table_data=function { var td_match,td_line; // the next line really confuses emacs c-mode indentation td_match=this.lines.shift.match(/^(\|\+|\||!)((?:([^[|]*?)\|(?!\|))?(.*))$/); if (td_match[1]=='|+') { this.html+='<caption'; } else { this.html+='<t'+((td_match[1]=='|')?'d':'h'); }   if (typeof td_match[3]!='undefined') { this.html+=' '+td_match[3]; td_line=td_match[4].split('||'); } else { td_line=td_match[2].split('||'); }   this.html+='>';while(td_line.length>1) { this.lines.unshift(td_match[1]+td_line.pop); }   this.html+=_parse_inline_nowiki(td_line[0]); var td=new WikiCode; var table_count=0; while(this.lines.length) { if (this.lines[0].charAt(0)=='|') { if (table_count==0) break; else if (this.lines[0].charAt(1)=='}') table_count--; } else if (this.lines[0].charAt(0)=='!'&&table_count==0) { break; } else if (this.lines[0].substr(0,2)=='{|') table_count++;td.lines.push(this.lines.shift); }   if (td.lines.length) { td.parse; }   this.html+=td.html; }; /* end this._parse_table_data */

this._parse_pre=function { this.html+=' '; do { this._endline(_parse_inline_nowiki(this.lines[0] .substring(1,this.lines[0].length))+"\n"); } while(this.lines.length&&this.lines[0].charAt(0)==' '); this.html+=' '; }; this._parse_block_image=function { this.html+=_parse_image(this.lines.shift); };

}; /* end WikiCode constructor */

function _parse_image(str) { var attr=str.substring(wpImageNamespace.length+3,str.length-2).split(/\s*\|\s*/); var filename=attr[0]; var caption=attr[attr.length-1]; var width,w_match; var thumb=false; var frame=false; var center=false; var align=''; var html=''; do { if (w_match=attr[0].match(/^(\d*)px$/)) { width=w_match[1]; } else switch(attr[0]) { case'thumb':case'thumbnail': thumb=true; case'frame': frame=true; break; case'none':case'right':case'left': center=false; align=attr[0]; break; case'center': center=true; align='none'; }   attr.shift; } while (attr.length); if (frame) { if (align=='') align='right'; html+="<div class='thumb t"+align+"'>"; if (thumb) { if (!width) width=wpDefaultThumbWidth; html+="<div style='width:" + (2+parseInt(width)) + "px;'>"; html+=_make_image(filename,caption,width); html+=" " + " <a href='" + wpBaseArticlePath+wpImageNamespace+':'+filename + "' class='internal' title='Enlarge'><img src='" + wpSkinMagnifyClip+"' /></a> "+_parse_inline_nowiki(caption) + " ";   } else { html+=' '; html+=_make_image(filename,caption); html+=" "+_parse_inline_nowiki(caption)+" "; }   html+='  '; } else if (align!='') { html+="<div class='float"+align+"'> " +_make_image(filename,caption,width) +" ";  } else { return _make_image(filename,caption,width); } if (center) { return" "+html+' '; } else {return html;} };

this._parse_inline_nowiki=function(str) { var start,lastend=0; var substart=0,nestlev=0,open,close,subloop; var html=''; while (-1!=(start=str.indexOf('<'+'nowiki>',substart))) { html+=_parse_inline_wiki(str.substring(lastend,start)); start+=8; substart=start; subloop=true; do { open=str.indexOf('<'+'nowiki>',substart); close=str.indexOf(' ',substart); if (close<=open||open==-1) { if (close==-1) { return html+html_entities(str.substr(start)); }       substart=close+9; if (nestlev) { nestlev--; } else { lastend=substart; html+=html_entities(str.substring(start,lastend-9));subloop=false; }     } else { substart=open+8; nestlev++; }   } while(subloop); } return html+_parse_inline_wiki(str.substr(lastend)); };

function _make_image(filename,caption,width) { filename=filename.charAt(0).toUpperCase+filename.substr(1); filename=filename.replace(/ /g,'_'); var md5=hex_md5(filename); var source=md5.charAt(0)+'/'+md5.substr(0,2)+'/'+filename; var img; if (wpShowImages) { if (width) { width="width='"+width+"px'"; }   img="<img onerror='this.onerror=null;this.src=\""      +wpImageFallbackPath+source+"\";' src='" +wpImageBasePath+source+"' alt='"+caption+"' "+width+"/>"; } else { img=wpImageNamespace+':'+filename +" <em style='color:red;'>(images disabled) "; } caption=_strip_inline_wiki(caption); return "<a class='image' title='"+caption+"' href='" +wpBaseArticlePath+wpImageNamespace+':' +filename+"'>"+img+"</a>"; };

function _parse_inline_images(str) { var start,substart=0,nestlev=0; var loop,close,open,wiki,html; while(-1!=(start=str.indexOf(,substart))) {   if (str.substr(start+2).match(RegExp('^'+wpImageNamespace+':','i'))) {      loop=true;substart=start;      do {         substart+=2;close=str.indexOf(,substart); open=str.indexOf('[[',substart);       if (close<=open||open==-1) {          if (close==-1) return str;          substart=close;          if (nestlev) {            nestlev--;          } else {            wiki=str.substring(start,close+2);            html=_parse_image(wiki);            str=str.replace(wiki,html);substart=start+html.length;loop=false;          }        } else {          substart=open;nestlev++;        }      } while(loop);    } else {      break;    }  } /* end while loop */  return str; };

function _parse_inline_wiki(str) { var aux_match,math_md5; str=_parse_inline_images(str); while(aux_match=str.match(/<(?:)math>(.*?)<\/math>/i)) { math_md5=hex_md5(aux_match[1]); str=str.replace(aux_match[0],"<img src='"+wpMathBasePath+math_md5+'.png'+"' />"); } return str .replace(/(.*?)(.*?)/g,' $1 $2 ') .replace(/(.*?)(.*?)/g,' $1 $2 ') .replace(/(.*?)(.*?)/g,' $1 $2 ') .replace(/(.*?)/g,' $1 ') .replace(/(.*?)/g,' $1 ') .replace(/~{5}(?!~)/g,Date) .replace(/~{4}(?!~)/g,wpSignature+' '+Date) .replace(/~{3}(?!~)/g,wpSignature) .replace(RegExp('\\[\\[:((?:'+wpCategoryNamespace +'|'+wpInterwikiCodes+'):.*?)\\]\\]','gi'),            "<a href='"+wpBaseArticlePath+"$1'>$1</a>") .replace(RegExp('\\[\\[(?:'+wpCategoryNamespace                   +'|'+wpInterwikiCodes+'):.*?\\]\\]','gi')             ,'') .replace(/\[\[([^|]*?)\]\](\w*)/g,"<a href='"+wpBaseArticlePath+"$1'>$1$2</a>") .replace(/\[\[(.*?)\|([^\]]+?)\]\](\w*)/g,            "<a href='"+wpBaseArticlePath+"$1'>$2$3</a>") .replace(/\[\[([^\]]*?:)?(.*?)( *\(.*?\))?\|\]\]/g,            "<a href='"+wpBaseArticlePath+"$1$2$3'>$2</a>") .replace(/\[(http|news|ftp|mailto|gopher|irc):(\/*)([^\]]*?) (.*?)\]/g,            "<a href='$1:$2$3'>$4</a>") .replace(/\[http:\/\/(.*?)\]/g,"<a href='http://$1'>[#]</a>") .replace(/\[(news|ftp|mailto|gopher|irc):(\/*)(.*?)\]/g,            "<a href='$1:$2$3'>$1:$2$3</a>") .replace(/(^| )(http|news|ftp|mailto|gopher|irc):(\/*)([^ $]*)/g,            "$1<a href='$2:$3$4'>$2:$3$4</a>") .replace(,) .replace(,); }; function _strip_inline_wiki(str) { return str.replace(/\[\^\*\|(.*?)\]\]/g,'$1') .replace(/\[\[(.*?)\]\]/g,'$1') .replace(/(.*?)/g,'$1'); };

function max(a,b) { if (a>b)return a; else return b; }; function min(a,b) { if (a<b)return a; else return b; };

function str_imatch(str_a,str_b) { var lim=min(str_a.length,str_b.length); for(var i=0;i<lim;i++) { if (str_a.charAt(i)!=str_b.charAt(i)) return i; } return i; };

function strip_cr(str) { return str.replace(/\n\r/g,"\n").replace(/\r/g,''); };

function html_entities(str) { return str.replace(/&/g,"&amp;") .replace(/</g,"&lt;") .replace(/>/g,"&gt;"); };

/* start md5 nonsense */ var chrsz=8;var hex_tab="0123456789abcdef";function hex_md5(s) { return binl2hex(core_md5(str2binl(s),s.length*chrsz));};function core_md5(x,len) {x[len>>5]|=0x80<<((len)%32);x[(((len+64)>>>9)<<4)+14]=len;var a=1732584193;var b=-271733879;var c=-1732584194;var d=271733878;for(var i=0;i<x.length;i+=16) {var olda=a;var oldb=b;var oldc=c;var oldd=d;a=md5_ff(a,b,c,d,x[i+0],7,-680876936);d=md5_ff(d,a,b,c,x[i+1],12,-389564586);c=md5_ff(c,d,a,b,x[i+2],17,606105819);b=md5_ff(b,c,d,a,x[i+3],22,-1044525330);a=md5_ff(a,b,c,d,x[i+4],7,-176418897);d=md5_ff(d,a,b,c,x[i+5],12,1200080426);c=md5_ff(c,d,a,b,x[i+6],17,-1473231341);b=md5_ff(b,c,d,a,x[i+7],22,-45705983);a=md5_ff(a,b,c,d,x[i+8],7,1770035416);d=md5_ff(d,a,b,c,x[i+9],12,-1958414417);c=md5_ff(c,d,a,b,x[i+10],17,-42063);b=md5_ff(b,c,d,a,x[i+11],22,-1990404162);a=md5_ff(a,b,c,d,x[i+12],7,1804603682);d=md5_ff(d,a,b,c,x[i+13],12,-40341101);c=md5_ff(c,d,a,b,x[i+14],17,-1502002290);b=md5_ff(b,c,d,a,x[i+15],22,1236535329);a=md5_gg(a,b,c,d,x[i+1],5,-165796510);d=md5_gg(d,a,b,c,x[i+6],9,-1069501632);c=md5_gg(c,d,a,b,x[i+11],14,643717713);b=md5_gg(b,c,d,a,x[i+0],20,-373897302);a=md5_gg(a,b,c,d,x[i+5],5,-701558691);d=md5_gg(d,a,b,c,x[i+10],9,38016083);c=md5_gg(c,d,a,b,x[i+15],14,-660478335);b=md5_gg(b,c,d,a,x[i+4],20,-405537848);a=md5_gg(a,b,c,d,x[i+9],5,568446438);d=md5_gg(d,a,b,c,x[i+14],9,-1019803690);c=md5_gg(c,d,a,b,x[i+3],14,-187363961);b=md5_gg(b,c,d,a,x[i+8],20,1163531501);a=md5_gg(a,b,c,d,x[i+13],5,-1444681467);d=md5_gg(d,a,b,c,x[i+2],9,-51403784);c=md5_gg(c,d,a,b,x[i+7],14,1735328473);b=md5_gg(b,c,d,a,x[i+12],20,-1926607734);a=md5_hh(a,b,c,d,x[i+5],4,-378558);d=md5_hh(d,a,b,c,x[i+8],11,-2022574463);c=md5_hh(c,d,a,b,x[i+11],16,1839030562);b=md5_hh(b,c,d,a,x[i+14],23,-35309556);a=md5_hh(a,b,c,d,x[i+1],4,-1530992060);d=md5_hh(d,a,b,c,x[i+4],11,1272893353);c=md5_hh(c,d,a,b,x[i+7],16,-155497632);b=md5_hh(b,c,d,a,x[i+10],23,-1094730640);a=md5_hh(a,b,c,d,x[i+13],4,681279174);d=md5_hh(d,a,b,c,x[i+0],11,-358537222);c=md5_hh(c,d,a,b,x[i+3],16,-722521979);b=md5_hh(b,c,d,a,x[i+6],23,76029189);a=md5_hh(a,b,c,d,x[i+9],4,-640364487);d=md5_hh(d,a,b,c,x[i+12],11,-421815835);c=md5_hh(c,d,a,b,x[i+15],16,530742520);b=md5_hh(b,c,d,a,x[i+2],23,-995338651);a=md5_ii(a,b,c,d,x[i+0],6,-198630844);d=md5_ii(d,a,b,c,x[i+7],10,1126891415);c=md5_ii(c,d,a,b,x[i+14],15,-1416354905);b=md5_ii(b,c,d,a,x[i+5],21,-57434055);a=md5_ii(a,b,c,d,x[i+12],6,1700485571);d=md5_ii(d,a,b,c,x[i+3],10,-1894986606);c=md5_ii(c,d,a,b,x[i+10],15,-1051523);b=md5_ii(b,c,d,a,x[i+1],21,-2054922799);a=md5_ii(a,b,c,d,x[i+8],6,1873313359);d=md5_ii(d,a,b,c,x[i+15],10,-30611744);c=md5_ii(c,d,a,b,x[i+6],15,-1560198380);b=md5_ii(b,c,d,a,x[i+13],21,1309151649);a=md5_ii(a,b,c,d,x[i+4],6,-145523070);d=md5_ii(d,a,b,c,x[i+11],10,-1120210379);c=md5_ii(c,d,a,b,x[i+2],15,718787259);b=md5_ii(b,c,d,a,x[i+9],21,-343485551);a=safe_add(a,olda);b=safe_add(b,oldb);c=safe_add(c,oldc);d=safe_add(d,oldd);};return Array(a,b,c,d);};function md5_cmn(q,a,b,x,s,t){return safe_add(bit_rol(safe_add(safe_add(a,q),safe_add(x,t)),s),b);};function md5_ff(a,b,c,d,x,s,t){return md5_cmn((b&c)|((~b)&d),a,b,x,s,t);};function md5_gg(a,b,c,d,x,s,t){return md5_cmn((b&d)|(c&(~d)),a,b,x,s,t);};function md5_hh(a,b,c,d,x,s,t){return md5_cmn(b^c^d,a,b,x,s,t);};function md5_ii(a,b,c,d,x,s,t){return md5_cmn(c^(b|(~d)),a,b,x,s,t);};function safe_add(x,y){var lsw=(x&0xFFFF)+(y&0xFFFF);var msw=(x>>16)+(y>>16)+(lsw>>16);return(msw<<16)|(lsw&0xFFFF);};function bit_rol(num,cnt){return(num<<cnt)|(num>>>(32-cnt));};function str2binl(str){var bin=Array;var mask=(1<<chrsz)-1;for(var i=0;i<str.length*chrsz;i+=chrsz)bin[i>>5]|=(str.charCodeAt(i/chrsz)&mask)<<(i%32);return bin;};function binl2hex(binarray){var str='';for(var i=0;i<binarray.length*4;i++){str+=hex_tab.charAt((binarray[i>>2]>>((i%4)*8+4))&0xF)+hex_tab.charAt((binarray[i>>2]>>((i%4)*8))&0xF);}return str;}; /* end md5 nonsense */