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main.ts
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/**
* marked - a markdown parser
* Copyright (c) 2011-2018, Christopher Jeffrey. (MIT Licensed)
* https://github.com/markedjs/marked
*/
// Definitions adapted from
// https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/marked/index.d.ts
// Original Definitions by: William Orr <https://github.com/worr>
// BendingBender <https://github.com/BendingBender>
// CrossR <https://github.com/CrossR>
// Mike Wickett <https://github.com/mwickett>
"use strict";
interface MarkedOptions {
/**
* A prefix URL for any relative link.
*/
baseUrl?: string;
/**
* Enable GFM line breaks. This option requires the gfm option to be true.
*/
breaks?: boolean;
/**
* Enable GitHub flavored markdown.
*/
gfm?: boolean;
/**
* Include an id attribute when emitting headings.
*/
headerIds?: boolean;
/**
* Set the prefix for header tag ids.
*/
headerPrefix?: string;
/**
* A function to highlight code blocks. The function takes three arguments: code, lang, and callback.
*/
highlight?(code: string, lang: string, callback?: (error: any | undefined, code: string) => void): string;
/**
* Set the prefix for code block classes.
*/
langPrefix?: string;
/**
* Mangle autolinks (<[email protected]>).
*/
mangle?: boolean;
/**
* Conform to obscure parts of markdown.pl as much as possible. Don't fix any of the original markdown bugs or poor behavior.
*/
pedantic?: boolean;
/**
* Type: object Default: new Renderer()
*
* An object containing functions to render tokens to HTML.
*/
renderer?: Renderer;
/**
* Sanitize the output. Ignore any HTML that has been input.
*/
sanitize?: boolean;
/**
* Optionally sanitize found HTML with a sanitizer function.
*/
sanitizer?(html: string): string;
/**
* Shows an HTML error message when rendering fails.
*/
silent?: boolean;
/**
* Use smarter list behavior than the original markdown. May eventually be default with the old behavior moved into pedantic.
*/
smartLists?: boolean;
/**
* Use "smart" typograhic punctuation for things like quotes and dashes.
*/
smartypants?: boolean;
/**
* Enable GFM tables. This option requires the gfm option to be true.
*/
tables?: boolean;
/**
* Generate closing slash for self-closing tags (<br/> instead of <br>)
*/
xhtml?: boolean;
}
interface Rules {
[ruleName: string]: any;
}
interface Link {
href: string;
title: string;
}
type TokensList = Token[] & {
links: {
[key: string]: { href: string; title: string; }
}
};
type Token =
Tokens.Space
| Tokens.Code
| Tokens.Heading
| Tokens.Table
| Tokens.Hr
| Tokens.BlockquoteStart
| Tokens.BlockquoteEnd
| Tokens.ListStart
| Tokens.LooseItemStart
| Tokens.ListItemStart
| Tokens.ListItemEnd
| Tokens.ListEnd
| Tokens.Paragraph
| Tokens.HTML
| Tokens.Text;
namespace Tokens {
export interface Space {
type: 'space';
}
export interface Code {
type: 'code';
lang?: string;
text: string;
escaped?: boolean;
}
export interface Heading {
type: 'heading';
depth: number;
text: string;
}
export interface Table {
type: 'table';
header: string[];
align: Array<'center' | 'left' | 'right' | null>;
cells: string[][];
}
export interface Hr {
type: 'hr';
}
export interface BlockquoteStart {
type: 'blockquote_start';
}
export interface BlockquoteEnd {
type: 'blockquote_end';
}
export interface ListStart {
type: 'list_start';
ordered: boolean;
}
export interface LooseItemStart {
type: 'loose_item_start';
}
export interface ListItemStart {
type: 'list_item_start';
}
export interface ListItemEnd {
type: 'list_item_end';
}
export interface ListEnd {
type: 'list_end';
}
export interface Paragraph {
type: 'paragraph';
pre?: boolean;
text: string;
}
export interface HTML {
type: 'html';
pre: boolean;
text: string;
}
export interface Text {
type: 'text';
text: string;
}
}
/**
* Block-Level Grammar
*/
const block: Rules = {
newline: /^\n+/,
code: /^( {4}[^\n]+\n*)+/,
fences: noop,
hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
nptable: noop,
blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
html: '^ {0,3}(?:' // optional indentation
+ '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+ '|comment[^\\n]*(\\n+|$)' // (2)
+ '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
+ '|<![A-Z][\\s\\S]*?>\\n*' // (4)
+ '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
+ '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
+ '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
+ '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
+ ')',
def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
table: noop,
lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading| {0,3}>|<\/?(?:tag)(?: +|\n|\/?>)|<(?:script|pre|style|!--))[^\n]+)*)/,
text: /^[^\n]+/,
};
block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
block.def = edit(block.def)
.replace('label', block._label)
.replace('title', block._title)
.getRegex();
block.bullet = /(?:[*+-]|\d{1,9}\.)/;
block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
block.item = edit(block.item, 'gm')
.replace(/bull/g, block.bullet)
.getRegex();
block.list = edit(block.list)
.replace(/bull/g, block.bullet)
.replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
.replace('def', `\\n+(?=${block.def.source})`)
.getRegex();
block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
+ '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
+ '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
+ '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
+ '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
+ '|track|ul';
block._comment = /<!--(?!-?>)[\s\S]*?-->/;
block.html = edit(block.html, 'i')
.replace('comment', block._comment)
.replace('tag', block._tag)
.replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
.getRegex();
block.paragraph = edit(block.paragraph)
.replace('hr', block.hr)
.replace('heading', block.heading)
.replace('lheading', block.lheading)
.replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
.getRegex();
block.blockquote = edit(block.blockquote)
.replace('paragraph', block.paragraph)
.getRegex();
/**
* Normal Block Grammar
*/
block.normal = merge({}, block);
/**
* GFM Block Grammar
*/
block.gfm = merge({}, block.normal, {
fences: /^ {0,3}(`{3,}|~{3,})([^`\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
paragraph: /^/,
heading: /^ *(#{1,6}) +([^\n]+?) *#* *(?:\n+|$)/
});
block.gfm.paragraph = edit(block.paragraph)
.replace('(?!', `(?!${block.gfm.fences.source.replace('\\1', '\\2')}|${block.list.source.replace('\\1', '\\3')}|`)
.getRegex();
/**
* GFM + Tables Block Grammar
*/
block.tables = merge({}, block.gfm, {
nptable: /^ *([^|\n ].*\|.*)\n *([-:]+ *\|[-| :]*)(?:\n((?:.*[^>\n ].*(?:\n|$))*)\n*|$)/,
table: /^ *\|(.+)\n *\|?( *[-:]+[-| :]*)(?:\n((?: *[^>\n ].*(?:\n|$))*)\n*|$)/
});
/**
* Pedantic grammar
*/
block.pedantic = merge({}, block.normal, {
html: edit(
'^ *(?:comment *(?:\\n|\\s*$)'
+ '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+ '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
.replace('comment', block._comment)
.replace(/tag/g, '(?!(?:'
+ 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
+ '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
+ '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
.getRegex(),
def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/
});
/**
* Block Lexer
*/
class Lexer {
/**
* Expose Block Rules
*/
static rules = block;
/**
* Static Lex Method
*/
static lex(src: string, options?: MarkedOptions) {
const lexer = new Lexer(options);
return lexer.lex(src);
};
tokens: TokensList;
options?: MarkedOptions;
rules: Rules;
constructor(options?: MarkedOptions) {
this.tokens = [] as TokensList;
this.tokens.links = Object.create(null);
this.options = options || marked.defaults;
this.rules = block.normal;
if (this.options.pedantic) {
this.rules = block.pedantic;
} else if (this.options.gfm) {
if (this.options.tables) {
this.rules = block.tables;
} else {
this.rules = block.gfm;
}
}
}
/**
* Preprocessing
*/
lex(src: string) {
src = src
.replace(/\r\n|\r/g, '\n')
.replace(/\t/g, ' ')
.replace(/\u00a0/g, ' ')
.replace(/\u2424/g, '\n');
return this.token(src, true);
}
/**
* Lexing
*/
token(src: string, top: boolean) {
src = src.replace(/^ +$/gm, '');
let next;
let loose;
let cap;
let bull;
let b;
let item;
let listStart;
let listItems;
let t;
let space;
let i;
let tag;
let l;
let isordered;
let istask;
let ischecked;
while (src) {
// newline
if (cap = this.rules.newline.exec(src)) {
src = src.substring(cap[0].length);
if (cap[0].length > 1) {
this.tokens.push({
type: 'space'
});
}
}
// code
if (cap = this.rules.code.exec(src)) {
src = src.substring(cap[0].length);
cap = cap[0].replace(/^ {4}/gm, '');
this.tokens.push({
type: 'code',
text: !this.options.pedantic
? rtrim(cap, '\n')
: cap
});
continue;
}
// fences (gfm)
if (cap = this.rules.fences.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'code',
lang: cap[2] ? cap[2].trim() : cap[2],
text: cap[3] || ''
});
continue;
}
// heading
if (cap = this.rules.heading.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'heading',
depth: cap[1].length,
text: cap[2]
});
continue;
}
// table no leading pipe (gfm)
if (top && (cap = this.rules.nptable.exec(src))) {
item = {
type: 'table',
header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
};
if (item.header.length === item.align.length) {
src = src.substring(cap[0].length);
for (i = 0; i < item.align.length; i++) {
if (/^ *-+: *$/.test(item.align[i])) {
item.align[i] = 'right';
} else if (/^ *:-+: *$/.test(item.align[i])) {
item.align[i] = 'center';
} else if (/^ *:-+ *$/.test(item.align[i])) {
item.align[i] = 'left';
} else {
item.align[i] = null;
}
}
for (i = 0; i < item.cells.length; i++) {
item.cells[i] = splitCells(item.cells[i], item.header.length);
}
this.tokens.push(item);
continue;
}
}
// hr
if (cap = this.rules.hr.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'hr'
});
continue;
}
// blockquote
if (cap = this.rules.blockquote.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'blockquote_start'
});
cap = cap[0].replace(/^ *> ?/gm, '');
// Pass `top` to keep the current
// "toplevel" state. This is exactly
// how markdown.pl works.
this.token(cap, top);
this.tokens.push({
type: 'blockquote_end'
});
continue;
}
// list
if (cap = this.rules.list.exec(src)) {
src = src.substring(cap[0].length);
bull = cap[2];
isordered = bull.length > 1;
listStart = {
type: 'list_start',
ordered: isordered,
start: isordered ? +bull : '',
loose: false
};
this.tokens.push(listStart);
// Get each top-level item.
cap = cap[0].match(this.rules.item);
listItems = [];
next = false;
l = cap.length;
i = 0;
for (; i < l; i++) {
item = cap[i];
// Remove the list item's bullet
// so it is seen as the next token.
space = item.length;
item = item.replace(/^ *([*+-]|\d+\.) */, '');
// Outdent whatever the
// list item contains. Hacky.
if (~item.indexOf('\n ')) {
space -= item.length;
item = !this.options.pedantic
? item.replace(new RegExp(`^ {1,${space}}`, 'gm'), '')
: item.replace(/^ {1,4}/gm, '');
}
// Determine whether the next list item belongs here.
// Backpedal if it does not belong in this list.
if (i !== l - 1) {
b = block.bullet.exec(cap[i + 1])[0];
if (bull.length > 1 ? b.length === 1
: (b.length > 1 || (this.options.smartLists && b !== bull))) {
src = cap.slice(i + 1).join('\n') + src;
i = l - 1;
}
}
// Determine whether item is loose or not.
// Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
// for discount behavior.
loose = next || /\n\n(?!\s*$)/.test(item);
if (i !== l - 1) {
next = item.charAt(item.length - 1) === '\n';
if (!loose) loose = next;
}
if (loose) {
listStart.loose = true;
}
// Check for task list items
istask = /^\[[ xX]\] /.test(item);
ischecked = undefined;
if (istask) {
ischecked = item[1] !== ' ';
item = item.replace(/^\[[ xX]\] +/, '');
}
t = {
type: 'list_item_start',
task: istask,
checked: ischecked,
loose
};
listItems.push(t);
this.tokens.push(t);
// Recurse.
this.token(item, false);
this.tokens.push({
type: 'list_item_end'
});
}
if (listStart.loose) {
l = listItems.length;
i = 0;
for (; i < l; i++) {
listItems[i].loose = true;
}
}
this.tokens.push({
type: 'list_end'
});
continue;
}
// html
if (cap = this.rules.html.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: this.options.sanitize
? 'paragraph'
: 'html',
pre: !this.options.sanitizer
&& (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
text: cap[0]
} as Token);
continue;
}
// def
if (top && (cap = this.rules.def.exec(src))) {
src = src.substring(cap[0].length);
if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
if (!this.tokens.links[tag]) {
this.tokens.links[tag] = {
href: cap[2],
title: cap[3]
};
}
continue;
}
// table (gfm)
if (top && (cap = this.rules.table.exec(src))) {
item = {
type: 'table',
header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
cells: cap[3] ? cap[3].replace(/(?: *\| *)?\n$/, '').split('\n') : []
};
if (item.header.length === item.align.length) {
src = src.substring(cap[0].length);
for (i = 0; i < item.align.length; i++) {
if (/^ *-+: *$/.test(item.align[i])) {
item.align[i] = 'right';
} else if (/^ *:-+: *$/.test(item.align[i])) {
item.align[i] = 'center';
} else if (/^ *:-+ *$/.test(item.align[i])) {
item.align[i] = 'left';
} else {
item.align[i] = null;
}
}
for (i = 0; i < item.cells.length; i++) {
item.cells[i] = splitCells(
item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
item.header.length);
}
this.tokens.push(item);
continue;
}
}
// lheading
if (cap = this.rules.lheading.exec(src)) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'heading',
depth: cap[2] === '=' ? 1 : 2,
text: cap[1]
});
continue;
}
// top-level paragraph
if (top && (cap = this.rules.paragraph.exec(src))) {
src = src.substring(cap[0].length);
this.tokens.push({
type: 'paragraph',
text: cap[1].charAt(cap[1].length - 1) === '\n'
? cap[1].slice(0, -1)
: cap[1]
});
continue;
}
// text
if (cap = this.rules.text.exec(src)) {
// Top-level should never reach here.
src = src.substring(cap[0].length);
this.tokens.push({
type: 'text',
text: cap[0]
});
continue;
}
if (src) {
throw new Error(`Infinite loop on byte: ${src.charCodeAt(0)}`);
}
}
return this.tokens;
}
}
/**
* Inline-Level Grammar
*/
const inline: Rules = {
escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
url: noop,
tag: '^comment'
+ '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+ '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+ '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+ '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+ '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
link: /^!?\[(label)\]\(href(?:\s+(title))?\s*\)/,
reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
em: /^_([^\s_])_(?!_)|^\*([^\s*"<\[])\*(?!\*)|^_([^\s][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s"<\[][\s\S]*?[^\s*])\*(?!\*)|^\*([^\s*"<\[][\s\S]*?[^\s])\*(?!\*)/,
code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
br: /^( {2,}|\\)\n(?!\s*$)/,
del: noop,
text: /^(`+|[^`])[\s\S]*?(?=[\\<!\[`*]|\b_| {2,}\n|$)/
};
// list of punctuation marks from common mark spec
// without ` and ] to workaround Rule 17 (inline code blocks/links)
inline._punctuation = '!"#$%&\'()*+,\\-./:;<=>?@\\[^_{|}~';
inline.em = edit(inline.em).replace(/punctuation/g, inline._punctuation).getRegex();
inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
inline.autolink = edit(inline.autolink)
.replace('scheme', inline._scheme)
.replace('email', inline._email)
.getRegex();
inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
inline.tag = edit(inline.tag)
.replace('comment', block._comment)
.replace('attribute', inline._attribute)
.getRegex();
inline._label = /(?:\[[^\[\]]*\]|\\[\[\]]?|`[^`]*`|[^\[\]\\])*?/;
inline._href = /\s*(<(?:\\[<>]?|[^\s<>\\])*>|(?:\\[()]?|\([^\s\x00-\x1f\\]*\)|[^\s\x00-\x1f()\\])*?)/;
inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
inline.link = edit(inline.link)
.replace('label', inline._label)
.replace('href', inline._href)
.replace('title', inline._title)
.getRegex();
inline.reflink = edit(inline.reflink)
.replace('label', inline._label)
.getRegex();
/**
* Normal Inline Grammar
*/
inline.normal = merge({}, inline);
/**
* Pedantic Inline Grammar
*/
inline.pedantic = merge({}, inline.normal, {
strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
link: edit(/^!?\[(label)\]\((.*?)\)/)
.replace('label', inline._label)
.getRegex(),
reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/)
.replace('label', inline._label)
.getRegex()
});
/**
* GFM Inline Grammar
*/
inline.gfm = merge({}, inline.normal, {
escape: edit(inline.escape).replace('])', '~|])').getRegex(),
_extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
_backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
del: /^~+(?=\S)([\s\S]*?\S)~+/,
text: edit(inline.text)
.replace(']|', '~]|')
.replace('|$', '|https?://|ftp://|www\\.|[a-zA-Z0-9.!#$%&\'*+/=?^_`{\\|}~-]+@|$')
.getRegex()
});
inline.gfm.url = edit(inline.gfm.url, 'i')
.replace('email', inline.gfm._extended_email)
.getRegex();
/**
* GFM + Line Breaks Inline Grammar
*/
inline.breaks = merge({}, inline.gfm, {
br: edit(inline.br).replace('{2,}', '*').getRegex(),
text: edit(inline.gfm.text).replace('{2,}', '*').getRegex()
});
/**
* Inline Lexer & Compiler
*/
class InlineLexer {
/**
* Expose Inline Rules
*/
static rules = inline;
/**
* Static Lexing/Compiling Method
*/
static output(src: string, links: {[key: string]: Link}, options?: MarkedOptions) {
const inline = new InlineLexer(links, options);
return inline.output(src);
};
static escapes =
(text?: string) => text ? text.replace(InlineLexer.rules._escapes, '$1') : text;
options: MarkedOptions;
links: {[key: string]: Link};
rules: Rules;
renderer: any;
inLink: any;
inRawBlock: any;
constructor(links: {[key: string]: Link}, options?: MarkedOptions) {
this.options = options || marked.defaults;
this.links = links;
this.rules = inline.normal;
this.renderer = this.options.renderer || new Renderer();
this.renderer.options = this.options;
if (!this.links) {
throw new Error('Tokens array requires a `links` property.');
}
if (this.options.pedantic) {
this.rules = inline.pedantic;
} else if (this.options.gfm) {
if (this.options.breaks) {
this.rules = inline.breaks;
} else {
this.rules = inline.gfm;
}
}
}
/**
* Lexing/Compiling
*/
output(src: string) {
let out = '';
let link;
let text;
let href;
let title;
let cap;
let prevCapZero;
while (src) {
// escape
if (cap = this.rules.escape.exec(src)) {
src = src.substring(cap[0].length);
out += escape(cap[1]);
continue;
}
// tag
if (cap = this.rules.tag.exec(src)) {
if (!this.inLink && /^<a /i.test(cap[0])) {
this.inLink = true;
} else if (this.inLink && /^<\/a>/i.test(cap[0])) {
this.inLink = false;
}
if (!this.inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
this.inRawBlock = true;
} else if (this.inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
this.inRawBlock = false;
}
src = src.substring(cap[0].length);
out += this.options.sanitize
? this.options.sanitizer
? this.options.sanitizer(cap[0])
: escape(cap[0])
: cap[0];
continue;
}
// link
if (cap = this.rules.link.exec(src)) {
src = src.substring(cap[0].length);
this.inLink = true;
href = cap[2];
if (this.options.pedantic) {
link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
if (link) {
href = link[1];
title = link[3];
} else {
title = '';
}
} else {
title = cap[3] ? cap[3].slice(1, -1) : '';
}
href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
out += this.outputLink(cap, {
href: InlineLexer.escapes(href),
title: InlineLexer.escapes(title)
});
this.inLink = false;
continue;
}
// reflink, nolink
if ((cap = this.rules.reflink.exec(src))
|| (cap = this.rules.nolink.exec(src))) {
src = src.substring(cap[0].length);
link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
link = this.links[link.toLowerCase()];
if (!link || !link.href) {
out += cap[0].charAt(0);
src = cap[0].substring(1) + src;
continue;
}
this.inLink = true;
out += this.outputLink(cap, link);
this.inLink = false;
continue;
}
// strong
if (cap = this.rules.strong.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.strong(this.output(cap[4] || cap[3] || cap[2] || cap[1]));
continue;
}
// em
if (cap = this.rules.em.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.em(this.output(cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]));
continue;
}
// code
if (cap = this.rules.code.exec(src)) {
src = src.substring(cap[0].length);
out += this.renderer.codespan(escape(cap[2].trim(), true));
continue;
}
// br
if (cap = this.rules.br.exec(src)) {
src = src.substring(cap[0].length);