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hyperdown.js

hyperdown.js 18 KB
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  1. !function(){var t=function(){var m,r,h,o,c,w,k;return k=function(t){return t.charAt(0).toUpperCase()+t.substring(1)},o=function(t){return t.replace(/[-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g,"\\$&")},c=function(t,e,s){var r,i,l,n,a,h;if(t instanceof Array)if(e instanceof Array)for(r=i=0,n=t.length;i<n;r=++i)h=t[r],s=c(h,e[r],s);else for(l=0,a=t.length;l<a;l++)h=t[l],s=c(h,e,s);else t=o(t),s=s.replace(new RegExp(t,"g"),e.replace(/\$/g,"$$$$"));return s},h=function(t){return t.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;")},w=function(t,e=null){var s,r,i,l,n;if(null==e)return t.replace(/^\s*/,"").replace(/\s*$/,"");for(n="",r=i=0,l=e.length-1;0<=l?i<=l:l<=i;r=0<=l?++i:--i)s=e[r],n+=o(s);return n="["+n+"]*",t.replace(new RegExp("^"+n),"").replace(new RegExp(n+"$"),"")},m=function(t){var e,s,r,i=[];if(t instanceof Array)for(s=e=0,r=t.length;e<r;s=++e)t[s],i.push(s);else for(s in t)i.push(s);return i},r=function(t){var e,s,r,i,l=[];if(t instanceof Array)for(s=0,r=t.length;s<r;s++)i=t[s],l.push(i);else for(e in t)i=t[e],l.push(i);return l},class{constructor(){this.commonWhiteList="kbd|b|i|strong|em|sup|sub|br|code|del|a|hr|small",this.blockHtmlTags="p|div|h[1-6]|blockquote|pre|table|dl|ol|ul|address|form|fieldset|iframe|hr|legend|article|section|nav|aside|hgroup|header|footer|figcaption|svg|script|noscript",this.specialWhiteList={table:"table|tbody|thead|tfoot|tr|td|th"},this.hooks={},this.html=!1,this.line=!1,this.blockParsers=[["code",10],["shtml",20],["pre",30],["ahtml",40],["shr",50],["list",60],["math",70],["html",80],["footnote",90],["definition",100],["quote",110],["table",120],["sh",130],["mh",140],["dhr",150],["default",9999]],this.parsers={}}makeHtml(t){var e,s,r,i,l;for(this.footnotes=[],this.definitions={},this.holders={},this.uniqid=Math.ceil(1e7*Math.random())+Math.ceil(1e7*Math.random()),this.id=0,this.blockParsers.sort(function(t,e){return t[1]<e[1]?-1:1}),e=0,s=(l=this.blockParsers).length;e<s;e++)[r]=i=l[e],void 0!==i[2]?this.parsers[r]=i[2]:this.parsers[r]=this["parseBlock"+k(r)].bind(this);return t=this.initText(t),t=this.parse(t),t=this.makeFootnotes(t),t=this.optimizeLines(t),this.call("makeHtml",t)}enableHtml(t=!0){this.html=t}enableLine(t=!0){this.line=t}hook(t,e){return null==this.hooks[t]&&(this.hooks[t]=[]),this.hooks[t].push(e)}makeHolder(t){var e="|\r"+this.uniqid+this.id+"\r|";return this.id+=1,this.holders[e]=t,e}initText(t){return t.replace(/\t/g,"    ").replace(/\r/g,"").replace(/(\u000A|\u000D|\u2028|\u2029)/g,"\n")}makeFootnotes(t){var e,s;if(0<this.footnotes.length){for(t+='<div class="footnotes"><hr><ol>',e=1;s=this.footnotes.shift();)"string"==typeof s?s+=` <a href=\"#fnref-${e}\" class=\"footnote-backref\">&#8617;</a>`:(s[s.length-1]+=` <a href=\"#fnref-${e}\" class=\"footnote-backref\">&#8617;</a>`,s=1<s.length?this.parse(s.join("\n")):this.parseInline(s[0])),t+=`<li id=\"fn-${e}\">${s}</li>`,e+=1;t+="</ol></div>"}return t}parse(t,e=!1,s=0){var r,i,l,n,a,h,o,c=[],p=this.parseBlock(t,c),u="";for(e&&1===p.length&&"normal"===p[0][0]&&(p[0][3]=!0),i=0,l=p.length;i<l;i++)[h,a,n,o]=p[i],r=c.slice(a,n+1),h="parse"+k(h),r=this.call("before"+k(h),r,o),n=this[h](r,o,a+s,n+s),u+=n=this.call("after"+k(h),n,o);return u}call(t,...e){var s,r,i,l;if([l]=e,null==this.hooks[t])return l;for(s=0,r=(i=this.hooks[t]).length;s<r;s++)l=i[s].apply(this,e),e[0]=l;return l}releaseHolder(t,e=!0){for(var s=0;0<=t.indexOf("\r")&&s<10;)t=c(m(this.holders),r(this.holders),t),s+=1;return e&&(this.holders={}),t}markLine(t,e=-1){return this.line?'<span class="line" data-start="'+t+'" data-end="'+(e=e<0?t:e)+'" data-id="'+this.uniqid+'"></span>':""}markLines(t,e){var s=-1;return this.line?t.map(t=>(s+=1,this.markLine(e+s)+t)):t}optimizeLines(t){var s=0,e=new RegExp(`class=\"line\" data\\-start=\"([0-9]+)\" data\\-end=\"([0-9]+)\" (data\\-id=\"${this.uniqid}\")`,"g");return this.line?t.replace(e,function(...t){var e=s!==parseInt(t[1])?'class="line" 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e=h(this.escapeBracket(t[1])),e=null!=this.definitions[t[2]]?`<img src=\"${this.definitions[t[2]]}\" alt=\"${e}\" title=\"${e}\">`:e;return this.makeHolder(e)})).replace(/\[((?:[^\]]|\\\]|\\\[)+?)\]\(((?:[^\)]|\\\)|\\\()+?)\)/g,(...t)=>{var e=this.parseInline(this.escapeBracket(t[1]),"",!1,!1),s=this.escapeBracket(t[2]);return[s,t]=this.cleanUrl(s,!0),this.makeHolder(`<a href=\"${s}\"${t=null==t?"":` title=\"${t}\"`}>${e}</a>`)})).replace(/\[((?:[^\]]|\\\]|\\\[)+?)\]\[((?:[^\]]|\\\]|\\\[)+?)\]/g,(...t)=>{var e=this.parseInline(this.escapeBracket(t[1]),"",!1,!1),e=null!=this.definitions[t[2]]?`<a href=\"${this.definitions[t[2]]}\">${e}</a>`:e;return this.makeHolder(e)}),t=this.parseInlineCallback(t),r&&(t=t.replace(/(^|[^\"])(https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\b([-a-zA-Z0-9@:%_\+.~#?&\/=]*)|(?:mailto:)?[_a-z0-9-\.\+]+@[_\w-]+(?:\.[a-z]{2,})+)($|[^\"])/g,(...t)=>{var e=this.cleanUrl(t[2]),s=this.call("parseLink",t[2]);return`${t[1]}<a href=\"${e}\">${s}</a>${t[5]}`})),t=this.call("afterParseInlineBeforeRelease",t),t=this.releaseHolder(t,s),t=this.call("afterParseInline",t)}parseInlineCallback(t){return t=(t=(t=(t=(t=(t=(t=t.replace(/(\*{3})((?:.|\r)+?)\1/gm,(...t)=>"<strong><em>"+this.parseInlineCallback(t[2])+"</em></strong>")).replace(/(\*{2})((?:.|\r)+?)\1/gm,(...t)=>"<strong>"+this.parseInlineCallback(t[2])+"</strong>")).replace(/(\*)((?:.|\r)+?)\1/gm,(...t)=>"<em>"+this.parseInlineCallback(t[2])+"</em>")).replace(/(\s+|^)(_{3})((?:.|\r)+?)\2(\s+|$)/gm,(...t)=>t[1]+"<strong><em>"+this.parseInlineCallback(t[3])+"</em></strong>"+t[4])).replace(/(\s+|^)(_{2})((?:.|\r)+?)\2(\s+|$)/gm,(...t)=>t[1]+"<strong>"+this.parseInlineCallback(t[3])+"</strong>"+t[4])).replace(/(\s+|^)(_)((?:.|\r)+?)\2(\s+|$)/gm,(...t)=>t[1]+"<em>"+this.parseInlineCallback(t[3])+"</em>"+t[4])).replace(/(~{2})((?:.|\r)+?)\1/gm,(...t)=>"<del>"+this.parseInlineCallback(t[2])+"</del>")}parseBlock(t,e){for(var s,r,i,l,n,a,h,o,c,p=t.split("\n"),u=0,k=p.length;u<k;u++)n=p[u],e.push(n);for(this.blocks=[],this.current="normal",this.pos=-1,c={special:m(this.specialWhiteList).join("|"),empty:0,html:!1},r=i=0,l=e.length;i<l;r=++i)if(n=e[r],null!=(s=this.getBlock())&&(s=s.slice(0)),"normal"===this.current||this.parsers[this.current](s,r,n,c,e))for(a in o=this.parsers)if(h=o[a],a!==this.current&&!h(s,r,n,c,e))break;return this.optimizeBlocks(this.blocks,e)}parseBlockList(t,e,s,r){var i,l;if(this.isBlock("list")&&!s.match(/^\s*\[((?:[^\]]|\\\]|\\\[)+?)\]:\s*(.+)$/)){if(s.match(/^(\s*)(~{3,}|`{3,})([^`~]*)$/i))return!0;if(r.empty<=1&&(l=s.match(/^(\s*)\S+/))&&l[1].length>=t[3][0]+r.empty)return r.empty=0,this.setBlock(e),!1;if(s.match(/^\s*$/)&&0===r.empty)return r.empty+=1,this.setBlock(e),!1}return!(l=s.match(/^(\s*)((?:[0-9]+\.)|\-|\+|\*)\s+/i))||(i=l[1].length,s=l[0].length-i,l=(r.empty=0)<="+-*".indexOf(l[2])?"ul":"ol",!this.isBlock("list")||i<t[3][0]||i===t[3][0]&&l!==t[3][1]?this.startBlock("list",e,[i,l,s]):this.setBlock(e),!1)}parseBlockCode(t,e,s,r){var i;if(s=s.match(/^(\s*)(~{3,}|`{3,})([^`~]*)$/i)){if(this.isBlock("code")){if(r.code!==s[2])return this.setBlock(e),!1;(i=t[3][2])?(r.empty=0,this.combineBlock().setBlock(e)):this.setBlock(e).endBlock()}else i=!1,this.isBlock("list")&&(t=t[3][0],i=s[1].length>=t+r.empty),r.code=s[2],this.startBlock("code",e,[s[1],s[3],i]);return!1}return!this.isBlock("code")||(this.setBlock(e),!1)}parseBlockShtml(t,e,s,r){if(this.html){if(s.match(/^(\s*)!!!(\s*)$/))return this.isBlock("shtml")?this.setBlock(e).endBlock():this.startBlock("shtml",e),!1;if(this.isBlock("shtml"))return this.setBlock(e),!1}return!0}parseBlockAhtml(t,e,s,r){var i,l,n,a;if(this.html)if(a=new RegExp(`^\\s*<(${this.blockHtmlTags})(\\s+[^>]*)?>`,"i"),a=s.match(a)){if(this.isBlock("ahtml"))return this.setBlock(e),!1;if(void 0===a[2]||"/"!==a[2]){for(this.startBlock("ahtml",e),i=new RegExp(`\\s*<(${this.blockHtmlTags})(\\s+[^>]*)?>`,"ig");;){if(!(n=i.exec(s)))break;l=n[1]}return 0<=s.indexOf(`</${l}>`)?this.endBlock():r.html=l,!1}}else{if(r.html&&0<=s.indexOf(`</${r.html}>`))return this.setBlock(e).endBlock(),r.html=!1;if(this.isBlock("ahtml"))return this.setBlock(e),!1;if(a=s.match(/^\s*<!\-\-(.*?)\-\->\s*$/))return this.startBlock("ahtml",e).endBlock(),!1}return!0}parseBlockMath(t,e,s){return s.match(/^(\s*)\$\$(\s*)$/)?(this.isBlock("math")?this.setBlock(e).endBlock():this.startBlock("math",e),!1):!this.isBlock("math")||(this.setBlock(e),!1)}parseBlockPre(t,e,s,r){return s.match(/^ {4}/)?(this.isBlock("pre")?this.setBlock(e):this.startBlock("pre",e),!1):!this.isBlock("pre")||!s.match(/^\s*$/)||(this.setBlock(e),!1)}parseBlockHtml(t,e,s,r){var i,l;return(i=s.match(new RegExp(`^\\s*<(${r.special})(\\s+[^>]*)?>`,"i")))?(l=i[1].toLowerCase(),this.isBlock("html",l)||this.isBlock("pre")||this.startBlock("html",e,l),!1):(i=s.match(new RegExp(`</(${r.special})>\\s*$`,"i")))?(l=i[1].toLowerCase(),this.isBlock("html",l)&&this.setBlock(e).endBlock(),!1):!this.isBlock("html")||(this.setBlock(e),!1)}parseBlockFootnote(t,e,s){var r;return!(r=s.match(/^\[\^((?:[^\]]|\\\]|\\\[)+?)\]:/))||(s=r[0].length-1,this.startBlock("footnote",e,[s,r[1]]),!1)}parseBlockDefinition(t,e,s){return!(s=s.match(/^\s*\[((?:[^\]]|\\\]|\\\[)+?)\]:\s*(.+)$/))||(this.definitions[s[1]]=this.cleanUrl(s[2]),this.startBlock("definition",e).endBlock(),!1)}parseBlockQuote(t,e,s){return!(s=s.match(/^(\s*)>/))||(this.isBlock("list")&&0<s[1].length||this.isBlock("quote")?this.setBlock(e):this.startBlock("quote",e),!1)}parseBlockTable(t,e,s,r,i){var l,n,a,h,o,c;if(o=s.match(/^((?:(?:(?:\||\+)(?:[ :]*\-+[ :]*)(?:\||\+))|(?:(?:[ :]*\-+[ :]*)(?:\||\+)(?:[ :]*\-+[ :]*))|(?:(?:[ :]*\-+[ 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*){3,}\s*$/)||(this.startBlock("hr",e).endBlock(),!1)}parseBlockDhr(t,e,s){return!s.match(/^(- *){3,}\s*$/)||(this.startBlock("hr",e).endBlock(),!1)}parseBlockDefault(t,e,s,r){return this.isBlock("footnote")?s.match(/^(\s*)/)[1].length>=t[3][0]?this.setBlock(e):this.startBlock("normal",e):this.isBlock("table")?0<=s.indexOf("|")?(t[3][2]+=1,this.setBlock(e,t[3])):this.startBlock("normal",e):this.isBlock("quote")?s.match(/^(\s*)$/)?this.startBlock("normal",e):this.setBlock(e):null==t||"normal"!==t[0]?this.startBlock("normal",e):this.setBlock(e),!0}optimizeBlocks(t,e){var s,r,i,l,n,a,h,o,c=t.slice(0),p=e.slice(0);for(c=this.call("beforeOptimizeBlocks",c,p),i=0;null!=c[i];)l=!1,s=c[i],a=null!=c[i-1]?c[i-1]:null,n=null!=c[i+1]?c[i+1]:null,[o,r,h]=s,"pre"===o&&p.slice(s[1],s[2]+1).reduce(function(t,e){return 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