bricks/3parties/marked.js
2024-03-06 11:14:26 +08:00

2865 lines
78 KiB
JavaScript
Executable File

/**
* smartypants text replacement
* @param {string} text
*/
function smartypants(text) {
return text
// em-dashes
.replace(/---/g, '\u2014')
// en-dashes
.replace(/--/g, '\u2013')
// opening singles
.replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
// closing singles & apostrophes
.replace(/'/g, '\u2019')
// opening doubles
.replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
// closing doubles
.replace(/"/g, '\u201d')
// ellipses
.replace(/\.{3}/g, '\u2026');
}
/**
* mangle email addresses
* @param {string} text
*/
function mangle(text) {
let out = '',
i,
ch;
const l = text.length;
for (i = 0; i < l; i++) {
ch = text.charCodeAt(i);
if (Math.random() > 0.5) {
ch = 'x' + ch.toString(16);
}
out += '&#' + ch + ';';
}
return out;
}
/**
* Block Lexer
*/
class Lexer {
constructor(options) {
this.tokens = [];
this.tokens.links = Object.create(null);
this.options = options || defaults;
this.options.tokenizer = this.options.tokenizer || new Tokenizer();
this.tokenizer = this.options.tokenizer;
this.tokenizer.options = this.options;
this.tokenizer.lexer = this;
this.inlineQueue = [];
this.state = {
inLink: false,
inRawBlock: false,
top: true
};
const rules = {
block: block.normal,
inline: inline.normal
};
if (this.options.pedantic) {
rules.block = block.pedantic;
rules.inline = inline.pedantic;
} else if (this.options.gfm) {
rules.block = block.gfm;
if (this.options.breaks) {
rules.inline = inline.breaks;
} else {
rules.inline = inline.gfm;
}
}
this.tokenizer.rules = rules;
}
/**
* Expose Rules
*/
static get rules() {
return {
block,
inline
};
}
/**
* Static Lex Method
*/
static lex(src, options) {
const lexer = new Lexer(options);
return lexer.lex(src);
}
/**
* Static Lex Inline Method
*/
static lexInline(src, options) {
const lexer = new Lexer(options);
return lexer.inlineTokens(src);
}
/**
* Preprocessing
*/
lex(src) {
src = src
.replace(/\r\n|\r/g, '\n');
this.blockTokens(src, this.tokens);
let next;
while (next = this.inlineQueue.shift()) {
this.inlineTokens(next.src, next.tokens);
}
return this.tokens;
}
/**
* Lexing
*/
blockTokens(src, tokens = []) {
if (this.options.pedantic) {
src = src.replace(/\t/g, ' ').replace(/^ +$/gm, '');
} else {
src = src.replace(/^( *)(\t+)/gm, (_, leading, tabs) => {
return leading + ' '.repeat(tabs.length);
});
}
let token, lastToken, cutSrc, lastParagraphClipped;
while (src) {
if (this.options.extensions
&& this.options.extensions.block
&& this.options.extensions.block.some((extTokenizer) => {
if (token = extTokenizer.call({ lexer: this }, src, tokens)) {
src = src.substring(token.raw.length);
tokens.push(token);
return true;
}
return false;
})) {
continue;
}
// newline
if (token = this.tokenizer.space(src)) {
src = src.substring(token.raw.length);
if (token.raw.length === 1 && tokens.length > 0) {
// if there's a single \n as a spacer, it's terminating the last line,
// so move it there so that we don't get unecessary paragraph tags
tokens[tokens.length - 1].raw += '\n';
} else {
tokens.push(token);
}
continue;
}
// code
if (token = this.tokenizer.code(src)) {
src = src.substring(token.raw.length);
lastToken = tokens[tokens.length - 1];
// An indented code block cannot interrupt a paragraph.
if (lastToken && (lastToken.type === 'paragraph' || lastToken.type === 'text')) {
lastToken.raw += '\n' + token.raw;
lastToken.text += '\n' + token.text;
this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
} else {
tokens.push(token);
}
continue;
}
// fences
if (token = this.tokenizer.fences(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// heading
if (token = this.tokenizer.heading(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// hr
if (token = this.tokenizer.hr(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// blockquote
if (token = this.tokenizer.blockquote(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// list
if (token = this.tokenizer.list(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// html
if (token = this.tokenizer.html(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// def
if (token = this.tokenizer.def(src)) {
src = src.substring(token.raw.length);
lastToken = tokens[tokens.length - 1];
if (lastToken && (lastToken.type === 'paragraph' || lastToken.type === 'text')) {
lastToken.raw += '\n' + token.raw;
lastToken.text += '\n' + token.raw;
this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
} else if (!this.tokens.links[token.tag]) {
this.tokens.links[token.tag] = {
href: token.href,
title: token.title
};
}
continue;
}
// table (gfm)
if (token = this.tokenizer.table(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// lheading
if (token = this.tokenizer.lheading(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// top-level paragraph
// prevent paragraph consuming extensions by clipping 'src' to extension start
cutSrc = src;
if (this.options.extensions && this.options.extensions.startBlock) {
let startIndex = Infinity;
const tempSrc = src.slice(1);
let tempStart;
this.options.extensions.startBlock.forEach(function(getStartIndex) {
tempStart = getStartIndex.call({ lexer: this }, tempSrc);
if (typeof tempStart === 'number' && tempStart >= 0) { startIndex = Math.min(startIndex, tempStart); }
});
if (startIndex < Infinity && startIndex >= 0) {
cutSrc = src.substring(0, startIndex + 1);
}
}
if (this.state.top && (token = this.tokenizer.paragraph(cutSrc))) {
lastToken = tokens[tokens.length - 1];
if (lastParagraphClipped && lastToken.type === 'paragraph') {
lastToken.raw += '\n' + token.raw;
lastToken.text += '\n' + token.text;
this.inlineQueue.pop();
this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
} else {
tokens.push(token);
}
lastParagraphClipped = (cutSrc.length !== src.length);
src = src.substring(token.raw.length);
continue;
}
// text
if (token = this.tokenizer.text(src)) {
src = src.substring(token.raw.length);
lastToken = tokens[tokens.length - 1];
if (lastToken && lastToken.type === 'text') {
lastToken.raw += '\n' + token.raw;
lastToken.text += '\n' + token.text;
this.inlineQueue.pop();
this.inlineQueue[this.inlineQueue.length - 1].src = lastToken.text;
} else {
tokens.push(token);
}
continue;
}
if (src) {
const errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
if (this.options.silent) {
console.error(errMsg);
break;
} else {
throw new Error(errMsg);
}
}
}
this.state.top = true;
return tokens;
}
inline(src, tokens = []) {
this.inlineQueue.push({ src, tokens });
return tokens;
}
/**
* Lexing/Compiling
*/
inlineTokens(src, tokens = []) {
let token, lastToken, cutSrc;
// String with links masked to avoid interference with em and strong
let maskedSrc = src;
let match;
let keepPrevChar, prevChar;
// Mask out reflinks
if (this.tokens.links) {
const links = Object.keys(this.tokens.links);
if (links.length > 0) {
while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
}
}
}
}
// Mask out other blocks
while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
}
// Mask out escaped em & strong delimiters
while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
maskedSrc = maskedSrc.slice(0, match.index + match[0].length - 2) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
this.tokenizer.rules.inline.escapedEmSt.lastIndex--;
}
while (src) {
if (!keepPrevChar) {
prevChar = '';
}
keepPrevChar = false;
// extensions
if (this.options.extensions
&& this.options.extensions.inline
&& this.options.extensions.inline.some((extTokenizer) => {
if (token = extTokenizer.call({ lexer: this }, src, tokens)) {
src = src.substring(token.raw.length);
tokens.push(token);
return true;
}
return false;
})) {
continue;
}
// escape
if (token = this.tokenizer.escape(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// tag
if (token = this.tokenizer.tag(src)) {
src = src.substring(token.raw.length);
lastToken = tokens[tokens.length - 1];
if (lastToken && token.type === 'text' && lastToken.type === 'text') {
lastToken.raw += token.raw;
lastToken.text += token.text;
} else {
tokens.push(token);
}
continue;
}
// link
if (token = this.tokenizer.link(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// reflink, nolink
if (token = this.tokenizer.reflink(src, this.tokens.links)) {
src = src.substring(token.raw.length);
lastToken = tokens[tokens.length - 1];
if (lastToken && token.type === 'text' && lastToken.type === 'text') {
lastToken.raw += token.raw;
lastToken.text += token.text;
} else {
tokens.push(token);
}
continue;
}
// em & strong
if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// code
if (token = this.tokenizer.codespan(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// br
if (token = this.tokenizer.br(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// del (gfm)
if (token = this.tokenizer.del(src)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// autolink
if (token = this.tokenizer.autolink(src, mangle)) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// url (gfm)
if (!this.state.inLink && (token = this.tokenizer.url(src, mangle))) {
src = src.substring(token.raw.length);
tokens.push(token);
continue;
}
// text
// prevent inlineText consuming extensions by clipping 'src' to extension start
cutSrc = src;
if (this.options.extensions && this.options.extensions.startInline) {
let startIndex = Infinity;
const tempSrc = src.slice(1);
let tempStart;
this.options.extensions.startInline.forEach(function(getStartIndex) {
tempStart = getStartIndex.call({ lexer: this }, tempSrc);
if (typeof tempStart === 'number' && tempStart >= 0) { startIndex = Math.min(startIndex, tempStart); }
});
if (startIndex < Infinity && startIndex >= 0) {
cutSrc = src.substring(0, startIndex + 1);
}
}
if (token = this.tokenizer.inlineText(cutSrc, smartypants)) {
src = src.substring(token.raw.length);
if (token.raw.slice(-1) !== '_') { // Track prevChar before string of ____ started
prevChar = token.raw.slice(-1);
}
keepPrevChar = true;
lastToken = tokens[tokens.length - 1];
if (lastToken && lastToken.type === 'text') {
lastToken.raw += token.raw;
lastToken.text += token.text;
} else {
tokens.push(token);
}
continue;
}
if (src) {
const errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
if (this.options.silent) {
console.error(errMsg);
break;
} else {
throw new Error(errMsg);
}
}
}
return tokens;
}
}
/**
* Parsing & Compiling
*/
class Parser {
constructor(options) {
this.options = options || defaults;
this.options.renderer = this.options.renderer || new Renderer();
this.renderer = this.options.renderer;
this.renderer.options = this.options;
this.textRenderer = new TextRenderer();
this.slugger = new Slugger();
}
/**
* Static Parse Method
*/
static parse(tokens, options) {
const parser = new Parser(options);
return parser.parse(tokens);
}
/**
* Static Parse Inline Method
*/
static parseInline(tokens, options) {
const parser = new Parser(options);
return parser.parseInline(tokens);
}
/**
* Parse Loop
*/
parse(tokens, top = true) {
let out = '',
i,
j,
k,
l2,
l3,
row,
cell,
header,
body,
token,
ordered,
start,
loose,
itemBody,
item,
checked,
task,
checkbox,
ret;
const l = tokens.length;
for (i = 0; i < l; i++) {
token = tokens[i];
// Run any renderer extensions
if (this.options.extensions && this.options.extensions.renderers && this.options.extensions.renderers[token.type]) {
ret = this.options.extensions.renderers[token.type].call({ parser: this }, token);
if (ret !== false || !['space', 'hr', 'heading', 'code', 'table', 'blockquote', 'list', 'html', 'paragraph', 'text'].includes(token.type)) {
out += ret || '';
continue;
}
}
switch (token.type) {
case 'space': {
continue;
}
case 'hr': {
out += this.renderer.hr();
continue;
}
case 'heading': {
out += this.renderer.heading(
this.parseInline(token.tokens),
token.depth,
unescape(this.parseInline(token.tokens, this.textRenderer)),
this.slugger);
continue;
}
case 'code': {
out += this.renderer.code(token.text,
token.lang,
token.escaped);
continue;
}
case 'table': {
header = '';
// header
cell = '';
l2 = token.header.length;
for (j = 0; j < l2; j++) {
cell += this.renderer.tablecell(
this.parseInline(token.header[j].tokens),
{ header: true, align: token.align[j] }
);
}
header += this.renderer.tablerow(cell);
body = '';
l2 = token.rows.length;
for (j = 0; j < l2; j++) {
row = token.rows[j];
cell = '';
l3 = row.length;
for (k = 0; k < l3; k++) {
cell += this.renderer.tablecell(
this.parseInline(row[k].tokens),
{ header: false, align: token.align[k] }
);
}
body += this.renderer.tablerow(cell);
}
out += this.renderer.table(header, body);
continue;
}
case 'blockquote': {
body = this.parse(token.tokens);
out += this.renderer.blockquote(body);
continue;
}
case 'list': {
ordered = token.ordered;
start = token.start;
loose = token.loose;
l2 = token.items.length;
body = '';
for (j = 0; j < l2; j++) {
item = token.items[j];
checked = item.checked;
task = item.task;
itemBody = '';
if (item.task) {
checkbox = this.renderer.checkbox(checked);
if (loose) {
if (item.tokens.length > 0 && item.tokens[0].type === 'paragraph') {
item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
}
} else {
item.tokens.unshift({
type: 'text',
text: checkbox
});
}
} else {
itemBody += checkbox;
}
}
itemBody += this.parse(item.tokens, loose);
body += this.renderer.listitem(itemBody, task, checked);
}
out += this.renderer.list(body, ordered, start);
continue;
}
case 'html': {
// TODO parse inline content if parameter markdown=1
out += this.renderer.html(token.text);
continue;
}
case 'paragraph': {
out += this.renderer.paragraph(this.parseInline(token.tokens));
continue;
}
case 'text': {
body = token.tokens ? this.parseInline(token.tokens) : token.text;
while (i + 1 < l && tokens[i + 1].type === 'text') {
token = tokens[++i];
body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
}
out += top ? this.renderer.paragraph(body) : body;
continue;
}
default: {
const errMsg = 'Token with "' + token.type + '" type was not found.';
if (this.options.silent) {
console.error(errMsg);
return;
} else {
throw new Error(errMsg);
}
}
}
}
return out;
}
/**
* Parse Inline Tokens
*/
parseInline(tokens, renderer) {
renderer = renderer || this.renderer;
let out = '',
i,
token,
ret;
const l = tokens.length;
for (i = 0; i < l; i++) {
token = tokens[i];
// Run any renderer extensions
if (this.options.extensions && this.options.extensions.renderers && this.options.extensions.renderers[token.type]) {
ret = this.options.extensions.renderers[token.type].call({ parser: this }, token);
if (ret !== false || !['escape', 'html', 'link', 'image', 'video', 'audio', 'strong', 'em', 'codespan', 'br', 'del', 'text'].includes(token.type)) {
out += ret || '';
continue;
}
}
switch (token.type) {
case 'escape': {
out += renderer.text(token.text);
break;
}
case 'html': {
out += renderer.html(token.text);
break;
}
case 'link': {
out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
break;
}
case 'image': {
out += renderer.image(token.href, token.title, token.text);
break;
}
case 'video': {
out += renderer.video(token.href, token.title, token.text);
break;
}
case 'audio': {
out += renderer.audio(token.href, token.title, token.text);
break;
}
case 'strong': {
out += renderer.strong(this.parseInline(token.tokens, renderer));
break;
}
case 'em': {
out += renderer.em(this.parseInline(token.tokens, renderer));
break;
}
case 'codespan': {
out += renderer.codespan(token.text);
break;
}
case 'br': {
out += renderer.br();
break;
}
case 'del': {
out += renderer.del(this.parseInline(token.tokens, renderer));
break;
}
case 'text': {
out += renderer.text(token.text);
break;
}
default: {
const errMsg = 'Token with "' + token.type + '" type was not found.';
if (this.options.silent) {
console.error(errMsg);
return;
} else {
throw new Error(errMsg);
}
}
}
}
return out;
}
}
/**
* Renderer
*/
class Renderer {
constructor(options) {
this.options = options || defaults;
}
code(code, infostring, escaped) {
const lang = (infostring || '').match(/\S*/)[0];
if (this.options.highlight) {
const out = this.options.highlight(code, lang);
if (out != null && out !== code) {
escaped = true;
code = out;
}
}
code = code.replace(/\n$/, '') + '\n';
if (!lang) {
return '<pre><code>'
+ (escaped ? code : escape(code, true))
+ '</code></pre>\n';
}
return '<pre><code class="'
+ this.options.langPrefix
+ escape(lang)
+ '">'
+ (escaped ? code : escape(code, true))
+ '</code></pre>\n';
}
/**
* @param {string} quote
*/
blockquote(quote) {
return `<blockquote>\n${quote}</blockquote>\n`;
}
html(html) {
return html;
}
/**
* @param {string} text
* @param {string} level
* @param {string} raw
* @param {any} slugger
*/
heading(text, level, raw, slugger) {
if (this.options.headerIds) {
const id = this.options.headerPrefix + slugger.slug(raw);
return `<h${level} id="${id}">${text}</h${level}>\n`;
}
// ignore IDs
return `<h${level}>${text}</h${level}>\n`;
}
hr() {
return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
}
list(body, ordered, start) {
const type = ordered ? 'ol' : 'ul',
startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
}
/**
* @param {string} text
*/
listitem(text) {
return `<li>${text}</li>\n`;
}
checkbox(checked) {
return '<input '
+ (checked ? 'checked="" ' : '')
+ 'disabled="" type="checkbox"'
+ (this.options.xhtml ? ' /' : '')
+ '> ';
}
/**
* @param {string} text
*/
paragraph(text) {
return `<p>${text}</p>\n`;
}
/**
* @param {string} header
* @param {string} body
*/
table(header, body) {
if (body) body = `<tbody>${body}</tbody>`;
return '<table>\n'
+ '<thead>\n'
+ header
+ '</thead>\n'
+ body
+ '</table>\n';
}
/**
* @param {string} content
*/
tablerow(content) {
return `<tr>\n${content}</tr>\n`;
}
tablecell(content, flags) {
const type = flags.header ? 'th' : 'td';
const tag = flags.align
? `<${type} align="${flags.align}">`
: `<${type}>`;
return tag + content + `</${type}>\n`;
}
/**
* span level renderer
* @param {string} text
*/
strong(text) {
return `<strong>${text}</strong>`;
}
/**
* @param {string} text
*/
em(text) {
return `<em>${text}</em>`;
}
/**
* @param {string} text
*/
codespan(text) {
return `<code>${text}</code>`;
}
br() {
return this.options.xhtml ? '<br/>' : '<br>';
}
/**
* @param {string} text
*/
del(text) {
return `<del>${text}</del>`;
}
/**
* @param {string} href
* @param {string} title
* @param {string} text
*/
link(href, title, text) {
href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
if (href === null) {
return text;
}
let out = '<a href="' + href + '"';
if (title) {
out += ' title="' + title + '"';
}
out += '>' + text + '</a>';
return out;
}
/**
* @param {string} href
* @param {string} title
* @param {string} text
*/
image(href, title, text) {
href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
if (href === null) {
return text;
}
let out = `<img src="${href}" alt="${text}"`;
if (title) {
out += ` title="${title}"`;
}
out += this.options.xhtml ? '/>' : '>';
return out;
}
video(href, title, text) {
href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
if (href === null) {
return text;
}
let out = `<video controls width="100%" alt="${text}" >
<source src="${href}" ></source>
</video>`;
return out;
}
audio(href, title, text) {
href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
if (href === null) {
return text;
}
let out = `<audio controls width="100%" alt="${text}" >
<source src="${href}" ></source>
</audio>`;
return out;
}
text(text) {
return text;
}
}
/**
* Slugger generates header id
*/
class Slugger {
constructor() {
this.seen = {};
}
/**
* @param {string} value
*/
serialize(value) {
return value
.toLowerCase()
.trim()
// remove html tags
.replace(/<[!\/a-z].*?>/ig, '')
// remove unwanted chars
.replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
.replace(/\s/g, '-');
}
/**
* Finds the next safe (unique) slug to use
* @param {string} originalSlug
* @param {boolean} isDryRun
*/
getNextSafeSlug(originalSlug, isDryRun) {
let slug = originalSlug;
let occurenceAccumulator = 0;
if (this.seen.hasOwnProperty(slug)) {
occurenceAccumulator = this.seen[originalSlug];
do {
occurenceAccumulator++;
slug = originalSlug + '-' + occurenceAccumulator;
} while (this.seen.hasOwnProperty(slug));
}
if (!isDryRun) {
this.seen[originalSlug] = occurenceAccumulator;
this.seen[slug] = 0;
}
return slug;
}
/**
* Convert string to unique id
* @param {object} [options]
* @param {boolean} [options.dryrun] Generates the next unique slug without
* updating the internal accumulator.
*/
slug(value, options = {}) {
const slug = this.serialize(value);
return this.getNextSafeSlug(slug, options.dryrun);
}
}
/**
* TextRenderer
* returns only the textual part of the token
*/
class TextRenderer {
// no need for block level renderers
strong(text) {
return text;
}
em(text) {
return text;
}
codespan(text) {
return text;
}
del(text) {
return text;
}
html(text) {
return text;
}
text(text) {
return text;
}
link(href, title, text) {
return '' + text;
}
image(href, title, text) {
return '' + text;
}
video(href, title, text) {
return '' + text;
}
audio(href, title, text) {
return '' + text;
}
br() {
return '';
}
}
function outputLink(cap, link, raw, lexer) {
const href = link.href;
const title = link.title ? escape(link.title) : null;
const text = cap[1].replace(/\\([\[\]])/g, '$1');
console.log('outputLink() link=', link, '=====================');
if (cap[0].charAt(0) !== '!') {
lexer.state.inLink = true;
const token = {
type: 'link',
raw,
href,
title,
text,
tokens: lexer.inlineTokens(text)
};
lexer.state.inLink = false;
console.log('outputLink(): cap=', cap[0], 'return a link');
return token;
}
/* add by yumoqing 2023-02-15 */
if (cap[0].startsWith('!v')){
console.log('outputLink(): cap=', cap[0], 'return a video');
return {
type: 'video',
raw, href,title,
text:escape(text)
}
} else if (cap[0].startsWith('!a')){
console.log('outputLink(): cap=', cap[0], 'return a audio');
return {
type:'audio',
raw, href, title,
text:escape(text)
}
}
/* add end */
console.log('outputLink(): cap=', cap[0], 'return a image');
return {
type: 'image',
raw,
href,
title,
text: escape(text)
};
}
function indentCodeCompensation(raw, text) {
const matchIndentToCode = raw.match(/^(\s+)(?:```)/);
if (matchIndentToCode === null) {
return text;
}
const indentToCode = matchIndentToCode[1];
return text
.split('\n')
.map(node => {
const matchIndentInNode = node.match(/^\s+/);
if (matchIndentInNode === null) {
return node;
}
const [indentInNode] = matchIndentInNode;
if (indentInNode.length >= indentToCode.length) {
return node.slice(indentToCode.length);
}
return node;
})
.join('\n');
}
/**
* Tokenizer
*/
class Tokenizer {
constructor(options) {
this.options = options || defaults;
}
space(src) {
const cap = this.rules.block.newline.exec(src);
if (cap && cap[0].length > 0) {
return {
type: 'space',
raw: cap[0]
};
}
}
code(src) {
const cap = this.rules.block.code.exec(src);
if (cap) {
const text = cap[0].replace(/^ {1,4}/gm, '');
return {
type: 'code',
raw: cap[0],
codeBlockStyle: 'indented',
text: !this.options.pedantic
? rtrim(text, '\n')
: text
};
}
}
fences(src) {
const cap = this.rules.block.fences.exec(src);
if (cap) {
const raw = cap[0];
const text = indentCodeCompensation(raw, cap[3] || '');
return {
type: 'code',
raw,
lang: cap[2] ? cap[2].trim().replace(this.rules.inline._escapes, '$1') : cap[2],
text
};
}
}
heading(src) {
const cap = this.rules.block.heading.exec(src);
if (cap) {
let text = cap[2].trim();
// remove trailing #s
if (/#$/.test(text)) {
const trimmed = rtrim(text, '#');
if (this.options.pedantic) {
text = trimmed.trim();
} else if (!trimmed || / $/.test(trimmed)) {
// CommonMark requires space before trailing #s
text = trimmed.trim();
}
}
return {
type: 'heading',
raw: cap[0],
depth: cap[1].length,
text,
tokens: this.lexer.inline(text)
};
}
}
hr(src) {
const cap = this.rules.block.hr.exec(src);
if (cap) {
return {
type: 'hr',
raw: cap[0]
};
}
}
blockquote(src) {
const cap = this.rules.block.blockquote.exec(src);
if (cap) {
const text = cap[0].replace(/^ *>[ \t]?/gm, '');
const top = this.lexer.state.top;
this.lexer.state.top = true;
const tokens = this.lexer.blockTokens(text);
this.lexer.state.top = top;
return {
type: 'blockquote',
raw: cap[0],
tokens,
text
};
}
}
list(src) {
let cap = this.rules.block.list.exec(src);
if (cap) {
let raw, istask, ischecked, indent, i, blankLine, endsWithBlankLine,
line, nextLine, rawLine, itemContents, endEarly;
let bull = cap[1].trim();
const isordered = bull.length > 1;
const list = {
type: 'list',
raw: '',
ordered: isordered,
start: isordered ? +bull.slice(0, -1) : '',
loose: false,
items: []
};
bull = isordered ? `\\d{1,9}\\${bull.slice(-1)}` : `\\${bull}`;
if (this.options.pedantic) {
bull = isordered ? bull : '[*+-]';
}
// Get next list item
const itemRegex = new RegExp(`^( {0,3}${bull})((?:[\t ][^\\n]*)?(?:\\n|$))`);
// Check if current bullet point can start a new List Item
while (src) {
endEarly = false;
if (!(cap = itemRegex.exec(src))) {
break;
}
if (this.rules.block.hr.test(src)) { // End list if bullet was actually HR (possibly move into itemRegex?)
break;
}
raw = cap[0];
src = src.substring(raw.length);
line = cap[2].split('\n', 1)[0].replace(/^\t+/, (t) => ' '.repeat(3 * t.length));
nextLine = src.split('\n', 1)[0];
if (this.options.pedantic) {
indent = 2;
itemContents = line.trimLeft();
} else {
indent = cap[2].search(/[^ ]/); // Find first non-space char
indent = indent > 4 ? 1 : indent; // Treat indented code blocks (> 4 spaces) as having only 1 indent
itemContents = line.slice(indent);
indent += cap[1].length;
}
blankLine = false;
if (!line && /^ *$/.test(nextLine)) { // Items begin with at most one blank line
raw += nextLine + '\n';
src = src.substring(nextLine.length + 1);
endEarly = true;
}
if (!endEarly) {
const nextBulletRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:[*+-]|\\d{1,9}[.)])((?:[ \t][^\\n]*)?(?:\\n|$))`);
const hrRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}((?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$)`);
const fencesBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}(?:\`\`\`|~~~)`);
const headingBeginRegex = new RegExp(`^ {0,${Math.min(3, indent - 1)}}#`);
// Check if following lines should be included in List Item
while (src) {
rawLine = src.split('\n', 1)[0];
nextLine = rawLine;
// Re-align to follow commonmark nesting rules
if (this.options.pedantic) {
nextLine = nextLine.replace(/^ {1,4}(?=( {4})*[^ ])/g, ' ');
}
// End list item if found code fences
if (fencesBeginRegex.test(nextLine)) {
break;
}
// End list item if found start of new heading
if (headingBeginRegex.test(nextLine)) {
break;
}
// End list item if found start of new bullet
if (nextBulletRegex.test(nextLine)) {
break;
}
// Horizontal rule found
if (hrRegex.test(src)) {
break;
}
if (nextLine.search(/[^ ]/) >= indent || !nextLine.trim()) { // Dedent if possible
itemContents += '\n' + nextLine.slice(indent);
} else {
// not enough indentation
if (blankLine) {
break;
}
// paragraph continuation unless last line was a different block level element
if (line.search(/[^ ]/) >= 4) { // indented code block
break;
}
if (fencesBeginRegex.test(line)) {
break;
}
if (headingBeginRegex.test(line)) {
break;
}
if (hrRegex.test(line)) {
break;
}
itemContents += '\n' + nextLine;
}
if (!blankLine && !nextLine.trim()) { // Check if current line is blank
blankLine = true;
}
raw += rawLine + '\n';
src = src.substring(rawLine.length + 1);
line = nextLine.slice(indent);
}
}
if (!list.loose) {
// If the previous item ended with a blank line, the list is loose
if (endsWithBlankLine) {
list.loose = true;
} else if (/\n *\n *$/.test(raw)) {
endsWithBlankLine = true;
}
}
// Check for task list items
if (this.options.gfm) {
istask = /^\[[ xX]\] /.exec(itemContents);
if (istask) {
ischecked = istask[0] !== '[ ] ';
itemContents = itemContents.replace(/^\[[ xX]\] +/, '');
}
}
list.items.push({
type: 'list_item',
raw,
task: !!istask,
checked: ischecked,
loose: false,
text: itemContents
});
list.raw += raw;
}
// Do not consume newlines at end of final item. Alternatively, make itemRegex *start* with any newlines to simplify/speed up endsWithBlankLine logic
list.items[list.items.length - 1].raw = raw.trimRight();
list.items[list.items.length - 1].text = itemContents.trimRight();
list.raw = list.raw.trimRight();
const l = list.items.length;
// Item child tokens handled here at end because we needed to have the final item to trim it first
for (i = 0; i < l; i++) {
this.lexer.state.top = false;
list.items[i].tokens = this.lexer.blockTokens(list.items[i].text, []);
if (!list.loose) {
// Check if list should be loose
const spacers = list.items[i].tokens.filter(t => t.type === 'space');
const hasMultipleLineBreaks = spacers.length > 0 && spacers.some(t => /\n.*\n/.test(t.raw));
list.loose = hasMultipleLineBreaks;
}
}
// Set all items to loose if list is loose
if (list.loose) {
for (i = 0; i < l; i++) {
list.items[i].loose = true;
}
}
return list;
}
}
html(src) {
const cap = this.rules.block.html.exec(src);
if (cap) {
const token = {
type: 'html',
raw: cap[0],
pre: !this.options.sanitizer
&& (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
text: cap[0]
};
if (this.options.sanitize) {
const text = this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0]);
token.type = 'paragraph';
token.text = text;
token.tokens = this.lexer.inline(text);
}
return token;
}
}
def(src) {
const cap = this.rules.block.def.exec(src);
if (cap) {
const tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
const href = cap[2] ? cap[2].replace(/^<(.*)>$/, '$1').replace(this.rules.inline._escapes, '$1') : '';
const title = cap[3] ? cap[3].substring(1, cap[3].length - 1).replace(this.rules.inline._escapes, '$1') : cap[3];
return {
type: 'def',
tag,
raw: cap[0],
href,
title
};
}
}
table(src) {
const cap = this.rules.block.table.exec(src);
if (cap) {
const item = {
type: 'table',
header: splitCells(cap[1]).map(c => { return { text: c }; }),
align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
rows: cap[3] && cap[3].trim() ? cap[3].replace(/\n[ \t]*$/, '').split('\n') : []
};
if (item.header.length === item.align.length) {
item.raw = cap[0];
let l = item.align.length;
let i, j, k, row;
for (i = 0; i < l; i++) {
if (/^ *-+: *$/.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;
}
}
l = item.rows.length;
for (i = 0; i < l; i++) {
item.rows[i] = splitCells(item.rows[i], item.header.length).map(c => { return { text: c }; });
}
// parse child tokens inside headers and cells
// header child tokens
l = item.header.length;
for (j = 0; j < l; j++) {
item.header[j].tokens = this.lexer.inline(item.header[j].text);
}
// cell child tokens
l = item.rows.length;
for (j = 0; j < l; j++) {
row = item.rows[j];
for (k = 0; k < row.length; k++) {
row[k].tokens = this.lexer.inline(row[k].text);
}
}
return item;
}
}
}
lheading(src) {
const cap = this.rules.block.lheading.exec(src);
if (cap) {
return {
type: 'heading',
raw: cap[0],
depth: cap[2].charAt(0) === '=' ? 1 : 2,
text: cap[1],
tokens: this.lexer.inline(cap[1])
};
}
}
paragraph(src) {
const cap = this.rules.block.paragraph.exec(src);
if (cap) {
const text = cap[1].charAt(cap[1].length - 1) === '\n'
? cap[1].slice(0, -1)
: cap[1];
return {
type: 'paragraph',
raw: cap[0],
text,
tokens: this.lexer.inline(text)
};
}
}
text(src) {
const cap = this.rules.block.text.exec(src);
if (cap) {
return {
type: 'text',
raw: cap[0],
text: cap[0],
tokens: this.lexer.inline(cap[0])
};
}
}
escape(src) {
const cap = this.rules.inline.escape.exec(src);
if (cap) {
return {
type: 'escape',
raw: cap[0],
text: escape(cap[1])
};
}
}
tag(src) {
const cap = this.rules.inline.tag.exec(src);
if (cap) {
if (!this.lexer.state.inLink && /^<a /i.test(cap[0])) {
this.lexer.state.inLink = true;
} else if (this.lexer.state.inLink && /^<\/a>/i.test(cap[0])) {
this.lexer.state.inLink = false;
}
if (!this.lexer.state.inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
this.lexer.state.inRawBlock = true;
} else if (this.lexer.state.inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
this.lexer.state.inRawBlock = false;
}
return {
type: this.options.sanitize
? 'text'
: 'html',
raw: cap[0],
inLink: this.lexer.state.inLink,
inRawBlock: this.lexer.state.inRawBlock,
text: this.options.sanitize
? (this.options.sanitizer
? this.options.sanitizer(cap[0])
: escape(cap[0]))
: cap[0]
};
}
}
link(src) {
const cap = this.rules.inline.link.exec(src);
if (cap) {
const trimmedUrl = cap[2].trim();
if (!this.options.pedantic && /^</.test(trimmedUrl)) {
// commonmark requires matching angle brackets
if (!(/>$/.test(trimmedUrl))) {
return;
}
// ending angle bracket cannot be escaped
const rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
return;
}
} else {
// find closing parenthesis
const lastParenIndex = findClosingBracket(cap[2], '()');
if (lastParenIndex > -1) {
const start = cap[0].indexOf('!') === 0 ? 5 : 4;
const linkLen = start + cap[1].length + lastParenIndex;
cap[2] = cap[2].substring(0, lastParenIndex);
cap[0] = cap[0].substring(0, linkLen).trim();
cap[3] = '';
}
}
let href = cap[2];
let title = '';
if (this.options.pedantic) {
// split pedantic href and title
const link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
if (link) {
href = link[1];
title = link[3];
}
} else {
title = cap[3] ? cap[3].slice(1, -1) : '';
}
href = href.trim();
if (/^</.test(href)) {
if (this.options.pedantic && !(/>$/.test(trimmedUrl))) {
// pedantic allows starting angle bracket without ending angle bracket
href = href.slice(1);
} else {
href = href.slice(1, -1);
}
}
return outputLink(cap, {
href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
title: title ? title.replace(this.rules.inline._escapes, '$1') : title
}, cap[0], this.lexer);
}
}
reflink(src, links) {
let cap;
if ((cap = this.rules.inline.reflink.exec(src))
|| (cap = this.rules.inline.nolink.exec(src))) {
let link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
link = links[link.toLowerCase()];
if (!link) {
const text = cap[0].charAt(0);
return {
type: 'text',
raw: text,
text
};
}
return outputLink(cap, link, cap[0], this.lexer);
}
}
emStrong(src, maskedSrc, prevChar = '') {
let match = this.rules.inline.emStrong.lDelim.exec(src);
if (!match) return;
// _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
if (match[3] && prevChar.match(/[\p{L}\p{N}]/u)) return;
const nextChar = match[1] || match[2] || '';
if (!nextChar || (nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
const lLength = match[0].length - 1;
let rDelim, rLength, delimTotal = lLength, midDelimTotal = 0;
const endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
endReg.lastIndex = 0;
// Clip maskedSrc to same section of string as src (move to lexer?)
maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
while ((match = endReg.exec(maskedSrc)) != null) {
rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
if (!rDelim) continue; // skip single * in __abc*abc__
rLength = rDelim.length;
if (match[3] || match[4]) { // found another Left Delim
delimTotal += rLength;
continue;
} else if (match[5] || match[6]) { // either Left or Right Delim
if (lLength % 3 && !((lLength + rLength) % 3)) {
midDelimTotal += rLength;
continue; // CommonMark Emphasis Rules 9-10
}
}
delimTotal -= rLength;
if (delimTotal > 0) continue; // Haven't found enough closing delimiters
// Remove extra characters. *a*** -> *a*
rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal);
const raw = src.slice(0, lLength + match.index + (match[0].length - rDelim.length) + rLength);
// Create `em` if smallest delimiter has odd char count. *a***
if (Math.min(lLength, rLength) % 2) {
const text = raw.slice(1, -1);
return {
type: 'em',
raw,
text,
tokens: this.lexer.inlineTokens(text)
};
}
// Create 'strong' if smallest delimiter has even char count. **a***
const text = raw.slice(2, -2);
return {
type: 'strong',
raw,
text,
tokens: this.lexer.inlineTokens(text)
};
}
}
}
codespan(src) {
const cap = this.rules.inline.code.exec(src);
if (cap) {
let text = cap[2].replace(/\n/g, ' ');
const hasNonSpaceChars = /[^ ]/.test(text);
const hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
text = text.substring(1, text.length - 1);
}
text = escape(text, true);
return {
type: 'codespan',
raw: cap[0],
text
};
}
}
br(src) {
const cap = this.rules.inline.br.exec(src);
if (cap) {
return {
type: 'br',
raw: cap[0]
};
}
}
del(src) {
const cap = this.rules.inline.del.exec(src);
if (cap) {
return {
type: 'del',
raw: cap[0],
text: cap[2],
tokens: this.lexer.inlineTokens(cap[2])
};
}
}
autolink(src, mangle) {
const cap = this.rules.inline.autolink.exec(src);
if (cap) {
let text, href;
if (cap[2] === '@') {
text = escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
href = 'mailto:' + text;
} else {
text = escape(cap[1]);
href = text;
}
return {
type: 'link',
raw: cap[0],
text,
href,
tokens: [
{
type: 'text',
raw: text,
text
}
]
};
}
}
url(src, mangle) {
let cap;
if (cap = this.rules.inline.url.exec(src)) {
let text, href;
if (cap[2] === '@') {
text = escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
href = 'mailto:' + text;
} else {
// do extended autolink path validation
let prevCapZero;
do {
prevCapZero = cap[0];
cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
} while (prevCapZero !== cap[0]);
text = escape(cap[0]);
if (cap[1] === 'www.') {
href = 'http://' + cap[0];
} else {
href = cap[0];
}
}
return {
type: 'link',
raw: cap[0],
text,
href,
tokens: [
{
type: 'text',
raw: text,
text
}
]
};
}
}
inlineText(src, smartypants) {
const cap = this.rules.inline.text.exec(src);
if (cap) {
let text;
if (this.lexer.state.inRawBlock) {
text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape(cap[0])) : cap[0];
} else {
text = escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
}
return {
type: 'text',
raw: cap[0],
text
};
}
}
}
function getDefaults() {
return {
async: false,
baseUrl: null,
breaks: false,
extensions: null,
gfm: true,
headerIds: true,
headerPrefix: '',
highlight: null,
langPrefix: 'language-',
mangle: true,
pedantic: false,
renderer: null,
sanitize: false,
sanitizer: null,
silent: false,
smartypants: false,
tokenizer: null,
walkTokens: null,
xhtml: false
};
}
let defaults = getDefaults();
function changeDefaults(newDefaults) {
defaults = newDefaults;
}
/**
* Helpers
*/
const escapeTest = /[&<>"']/;
const escapeReplace = new RegExp(escapeTest.source, 'g');
const escapeTestNoEncode = /[<>"']|&(?!(#\d{1,7}|#[Xx][a-fA-F0-9]{1,6}|\w+);)/;
const escapeReplaceNoEncode = new RegExp(escapeTestNoEncode.source, 'g');
const escapeReplacements = {
'&': '&amp;',
'<': '&lt;',
'>': '&gt;',
'"': '&quot;',
"'": '&#39;'
};
const getEscapeReplacement = (ch) => escapeReplacements[ch];
function escape(html, encode) {
if (encode) {
if (escapeTest.test(html)) {
return html.replace(escapeReplace, getEscapeReplacement);
}
} else {
if (escapeTestNoEncode.test(html)) {
return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
}
}
return html;
}
const unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
/**
* @param {string} html
*/
function unescape(html) {
// explicitly match decimal, hex, and named HTML entities
return html.replace(unescapeTest, (_, n) => {
n = n.toLowerCase();
if (n === 'colon') return ':';
if (n.charAt(0) === '#') {
return n.charAt(1) === 'x'
? String.fromCharCode(parseInt(n.substring(2), 16))
: String.fromCharCode(+n.substring(1));
}
return '';
});
}
const caret = /(^|[^\[])\^/g;
/**
* @param {string | RegExp} regex
* @param {string} opt
*/
function edit(regex, opt) {
regex = typeof regex === 'string' ? regex : regex.source;
opt = opt || '';
const obj = {
replace: (name, val) => {
val = val.source || val;
val = val.replace(caret, '$1');
regex = regex.replace(name, val);
return obj;
},
getRegex: () => {
return new RegExp(regex, opt);
}
};
return obj;
}
const nonWordAndColonTest = /[^\w:]/g;
const originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
/**
* @param {boolean} sanitize
* @param {string} base
* @param {string} href
*/
function cleanUrl(sanitize, base, href) {
if (sanitize) {
let prot;
try {
prot = decodeURIComponent(unescape(href))
.replace(nonWordAndColonTest, '')
.toLowerCase();
} catch (e) {
return null;
}
if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
return null;
}
}
if (base && !originIndependentUrl.test(href)) {
href = resolveUrl(base, href);
}
try {
href = encodeURI(href).replace(/%25/g, '%');
} catch (e) {
return null;
}
return href;
}
const baseUrls = {};
const justDomain = /^[^:]+:\/*[^/]*$/;
const protocol = /^([^:]+:)[\s\S]*$/;
const domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
/**
* @param {string} base
* @param {string} href
*/
function resolveUrl(base, href) {
if (!baseUrls[' ' + base]) {
// we can ignore everything in base after the last slash of its path component,
// but we might need to add _that_
// https://tools.ietf.org/html/rfc3986#section-3
if (justDomain.test(base)) {
baseUrls[' ' + base] = base + '/';
} else {
baseUrls[' ' + base] = rtrim(base, '/', true);
}
}
base = baseUrls[' ' + base];
const relativeBase = base.indexOf(':') === -1;
if (href.substring(0, 2) === '//') {
if (relativeBase) {
return href;
}
return base.replace(protocol, '$1') + href;
} else if (href.charAt(0) === '/') {
if (relativeBase) {
return href;
}
return base.replace(domain, '$1') + href;
} else {
return base + href;
}
}
const noopTest = { exec: function noopTest() {} };
function merge(obj) {
let i = 1,
target,
key;
for (; i < arguments.length; i++) {
target = arguments[i];
for (key in target) {
if (Object.prototype.hasOwnProperty.call(target, key)) {
obj[key] = target[key];
}
}
}
return obj;
}
function splitCells(tableRow, count) {
// ensure that every cell-delimiting pipe has a space
// before it to distinguish it from an escaped pipe
const row = tableRow.replace(/\|/g, (match, offset, str) => {
let escaped = false,
curr = offset;
while (--curr >= 0 && str[curr] === '\\') escaped = !escaped;
if (escaped) {
// odd number of slashes means | is escaped
// so we leave it alone
return '|';
} else {
// add space before unescaped |
return ' |';
}
}),
cells = row.split(/ \|/);
let i = 0;
// First/last cell in a row cannot be empty if it has no leading/trailing pipe
if (!cells[0].trim()) { cells.shift(); }
if (cells.length > 0 && !cells[cells.length - 1].trim()) { cells.pop(); }
if (cells.length > count) {
cells.splice(count);
} else {
while (cells.length < count) cells.push('');
}
for (; i < cells.length; i++) {
// leading or trailing whitespace is ignored per the gfm spec
cells[i] = cells[i].trim().replace(/\\\|/g, '|');
}
return cells;
}
/**
* Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
* /c*$/ is vulnerable to REDOS.
*
* @param {string} str
* @param {string} c
* @param {boolean} invert Remove suffix of non-c chars instead. Default falsey.
*/
function rtrim(str, c, invert) {
const l = str.length;
if (l === 0) {
return '';
}
// Length of suffix matching the invert condition.
let suffLen = 0;
// Step left until we fail to match the invert condition.
while (suffLen < l) {
const currChar = str.charAt(l - suffLen - 1);
if (currChar === c && !invert) {
suffLen++;
} else if (currChar !== c && invert) {
suffLen++;
} else {
break;
}
}
return str.slice(0, l - suffLen);
}
function findClosingBracket(str, b) {
if (str.indexOf(b[1]) === -1) {
return -1;
}
const l = str.length;
let level = 0,
i = 0;
for (; i < l; i++) {
if (str[i] === '\\') {
i++;
} else if (str[i] === b[0]) {
level++;
} else if (str[i] === b[1]) {
level--;
if (level < 0) {
return i;
}
}
}
return -1;
}
function checkSanitizeDeprecation(opt) {
if (opt && opt.sanitize && !opt.silent) {
console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
}
}
// copied from https://stackoverflow.com/a/5450113/806777
/**
* @param {string} pattern
* @param {number} count
*/
function repeatString(pattern, count) {
if (count < 1) {
return '';
}
let result = '';
while (count > 1) {
if (count & 1) {
result += pattern;
}
count >>= 1;
pattern += pattern;
}
return result + pattern;
}
/**
* Marked
*/
function marked(src, opt, callback) {
// throw error in case of non string input
if (typeof src === 'undefined' || src === null) {
throw new Error('marked(): input parameter is undefined or null');
}
if (typeof src !== 'string') {
throw new Error('marked(): input parameter is of type '
+ Object.prototype.toString.call(src) + ', string expected');
}
if (typeof opt === 'function') {
callback = opt;
opt = null;
}
opt = merge({}, marked.defaults, opt || {});
checkSanitizeDeprecation(opt);
if (callback) {
const highlight = opt.highlight;
let tokens;
try {
tokens = Lexer.lex(src, opt);
} catch (e) {
return callback(e);
}
const done = function(err) {
let out;
if (!err) {
try {
if (opt.walkTokens) {
marked.walkTokens(tokens, opt.walkTokens);
}
out = Parser.parse(tokens, opt);
} catch (e) {
err = e;
}
}
opt.highlight = highlight;
return err
? callback(err)
: callback(null, out);
};
if (!highlight || highlight.length < 3) {
return done();
}
delete opt.highlight;
if (!tokens.length) return done();
let pending = 0;
marked.walkTokens(tokens, function(token) {
if (token.type === 'code') {
pending++;
setTimeout(() => {
highlight(token.text, token.lang, function(err, code) {
if (err) {
return done(err);
}
if (code != null && code !== token.text) {
token.text = code;
token.escaped = true;
}
pending--;
if (pending === 0) {
done();
}
});
}, 0);
}
});
if (pending === 0) {
done();
}
return;
}
function onError(e) {
e.message += '\nPlease report this to https://github.com/markedjs/marked.';
if (opt.silent) {
return '<p>An error occurred:</p><pre>'
+ escape(e.message + '', true)
+ '</pre>';
}
throw e;
}
try {
const tokens = Lexer.lex(src, opt);
if (opt.walkTokens) {
if (opt.async) {
return Promise.all(marked.walkTokens(tokens, opt.walkTokens))
.then(() => {
return Parser.parse(tokens, opt);
})
.catch(onError);
}
marked.walkTokens(tokens, opt.walkTokens);
}
return Parser.parse(tokens, opt);
} catch (e) {
onError(e);
}
}
/**
* Options
*/
marked.options =
marked.setOptions = function(opt) {
merge(marked.defaults, opt);
changeDefaults(marked.defaults);
return marked;
};
marked.getDefaults = getDefaults;
marked.defaults = defaults;
/**
* Use Extension
*/
marked.use = function(...args) {
const extensions = marked.defaults.extensions || { renderers: {}, childTokens: {} };
args.forEach((pack) => {
// copy options to new object
const opts = merge({}, pack);
// set async to true if it was set to true before
opts.async = marked.defaults.async || opts.async;
// ==-- Parse "addon" extensions --== //
if (pack.extensions) {
pack.extensions.forEach((ext) => {
if (!ext.name) {
throw new Error('extension name required');
}
if (ext.renderer) { // Renderer extensions
const prevRenderer = extensions.renderers[ext.name];
if (prevRenderer) {
// Replace extension with func to run new extension but fall back if false
extensions.renderers[ext.name] = function(...args) {
let ret = ext.renderer.apply(this, args);
if (ret === false) {
ret = prevRenderer.apply(this, args);
}
return ret;
};
} else {
extensions.renderers[ext.name] = ext.renderer;
}
}
if (ext.tokenizer) { // Tokenizer Extensions
if (!ext.level || (ext.level !== 'block' && ext.level !== 'inline')) {
throw new Error("extension level must be 'block' or 'inline'");
}
if (extensions[ext.level]) {
extensions[ext.level].unshift(ext.tokenizer);
} else {
extensions[ext.level] = [ext.tokenizer];
}
if (ext.start) { // Function to check for start of token
if (ext.level === 'block') {
if (extensions.startBlock) {
extensions.startBlock.push(ext.start);
} else {
extensions.startBlock = [ext.start];
}
} else if (ext.level === 'inline') {
if (extensions.startInline) {
extensions.startInline.push(ext.start);
} else {
extensions.startInline = [ext.start];
}
}
}
}
if (ext.childTokens) { // Child tokens to be visited by walkTokens
extensions.childTokens[ext.name] = ext.childTokens;
}
});
opts.extensions = extensions;
}
// ==-- Parse "overwrite" extensions --== //
if (pack.renderer) {
const renderer = marked.defaults.renderer || new Renderer();
for (const prop in pack.renderer) {
const prevRenderer = renderer[prop];
// Replace renderer with func to run extension, but fall back if false
renderer[prop] = (...args) => {
let ret = pack.renderer[prop].apply(renderer, args);
if (ret === false) {
ret = prevRenderer.apply(renderer, args);
}
return ret;
};
}
opts.renderer = renderer;
}
if (pack.tokenizer) {
const tokenizer = marked.defaults.tokenizer || new Tokenizer();
for (const prop in pack.tokenizer) {
const prevTokenizer = tokenizer[prop];
// Replace tokenizer with func to run extension, but fall back if false
tokenizer[prop] = (...args) => {
let ret = pack.tokenizer[prop].apply(tokenizer, args);
if (ret === false) {
ret = prevTokenizer.apply(tokenizer, args);
}
return ret;
};
}
opts.tokenizer = tokenizer;
}
// ==-- Parse WalkTokens extensions --== //
if (pack.walkTokens) {
const walkTokens = marked.defaults.walkTokens;
opts.walkTokens = function(token) {
let values = [];
values.push(pack.walkTokens.call(this, token));
if (walkTokens) {
values = values.concat(walkTokens.call(this, token));
}
return values;
};
}
marked.setOptions(opts);
});
};
/**
* Run callback for every token
*/
marked.walkTokens = function(tokens, callback) {
let values = [];
for (const token of tokens) {
values = values.concat(callback.call(marked, token));
switch (token.type) {
case 'table': {
for (const cell of token.header) {
values = values.concat(marked.walkTokens(cell.tokens, callback));
}
for (const row of token.rows) {
for (const cell of row) {
values = values.concat(marked.walkTokens(cell.tokens, callback));
}
}
break;
}
case 'list': {
values = values.concat(marked.walkTokens(token.items, callback));
break;
}
default: {
if (marked.defaults.extensions && marked.defaults.extensions.childTokens && marked.defaults.extensions.childTokens[token.type]) { // Walk any extensions
marked.defaults.extensions.childTokens[token.type].forEach(function(childTokens) {
values = values.concat(marked.walkTokens(token[childTokens], callback));
});
} else if (token.tokens) {
values = values.concat(marked.walkTokens(token.tokens, callback));
}
}
}
}
return values;
};
/**
* Parse Inline
* @param {string} src
*/
marked.parseInline = function(src, opt) {
// throw error in case of non string input
if (typeof src === 'undefined' || src === null) {
throw new Error('marked.parseInline(): input parameter is undefined or null');
}
if (typeof src !== 'string') {
throw new Error('marked.parseInline(): input parameter is of type '
+ Object.prototype.toString.call(src) + ', string expected');
}
opt = merge({}, marked.defaults, opt || {});
checkSanitizeDeprecation(opt);
try {
const tokens = Lexer.lexInline(src, opt);
if (opt.walkTokens) {
marked.walkTokens(tokens, opt.walkTokens);
}
return Parser.parseInline(tokens, opt);
} catch (e) {
e.message += '\nPlease report this to https://github.com/markedjs/marked.';
if (opt.silent) {
return '<p>An error occurred:</p><pre>'
+ escape(e.message + '', true)
+ '</pre>';
}
throw e;
}
};
/**
* Expose
*/
marked.Parser = Parser;
marked.parser = Parser.parse;
marked.Renderer = Renderer;
marked.TextRenderer = TextRenderer;
marked.Lexer = Lexer;
marked.lexer = Lexer.lex;
marked.Tokenizer = Tokenizer;
marked.Slugger = Slugger;
marked.parse = marked;
const options = marked.options;
const setOptions = marked.setOptions;
const use = marked.use;
const walkTokens = marked.walkTokens;
const parseInline = marked.parseInline;
const parse = marked;
const parser = Parser.parse;
const lexer = Lexer.lex;
/**
* Block-Level Grammar
*/
const block = {
newline: /^(?: *(?:\n|$))+/,
code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?=\n|$)|$)/,
hr: /^ {0,3}((?:-[\t ]*){3,}|(?:_[ \t]*){3,}|(?:\*[ \t]*){3,})(?:\n+|$)/,
heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
list: /^( {0,3}bull)([ \t][^\n]+?)?(?:\n|$)/,
html: '^ {0,3}(?:' // optional indentation
+ '<(script|pre|style|textarea)[\\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*|$)' // (5)
+ '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+ '|<(?!script|pre|style|textarea)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+ '|</(?!script|pre|style|textarea)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+ ')',
def: /^ {0,3}\[(label)\]: *(?:\n *)?([^<\s][^\s]*|<.*?>)(?:(?: +(?:\n *)?| *\n *)(title))? *(?:\n+|$)/,
table: noopTest,
lheading: /^((?:.|\n(?!\n))+?)\n {0,3}(=+|-+) *(?:\n+|$)/,
// regex template, placeholders will be replaced according to different paragraph
// interruption rules of commonmark and the original markdown spec:
_paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html|table| +\n)[^\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.listItemStart = edit(/^( *)(bull) */)
.replace('bull', 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', ' {0,3}#{1,6} ')
.replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
.replace('|table', '')
.replace('blockquote', ' {0,3}>')
.replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
.replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
.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, {
table: '^ *([^\\n ].*\\|.*)\\n' // Header
+ ' {0,3}(?:\\| *)?(:?-+:? *(?:\\| *:?-+:? *)*)(?:\\| *)?' // Align
+ '(?:\\n((?:(?! *\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
});
block.gfm.table = edit(block.gfm.table)
.replace('hr', block.hr)
.replace('heading', ' {0,3}#{1,6} ')
.replace('blockquote', ' {0,3}>')
.replace('code', ' {4}[^\\n]')
.replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
.replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
.replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
.getRegex();
block.gfm.paragraph = edit(block._paragraph)
.replace('hr', block.hr)
.replace('heading', ' {0,3}#{1,6} ')
.replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
.replace('table', block.gfm.table) // interrupt paragraphs with table
.replace('blockquote', ' {0,3}>')
.replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
.replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
.replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|textarea|!--)')
.replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
.getRegex();
/**
* Pedantic grammar (original John Gruber's loose markdown specification)
*/
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+|$)/,
heading: /^(#{1,6})(.*)(?:\n+|$)/,
fences: noopTest, // fences not supported
lheading: /^(.+?)\n {0,3}(=+|-+) *(?:\n+|$)/,
paragraph: edit(block.normal._paragraph)
.replace('hr', block.hr)
.replace('heading', ' *#{1,6} *[^\n]')
.replace('lheading', block.lheading)
.replace('blockquote', ' {0,3}>')
.replace('|fences', '')
.replace('|list', '')
.replace('|html', '')
.getRegex()
});
/**
* Inline-Level Grammar
link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
*/
const inline = {
escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
url: noopTest,
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: /^(?:![va]?)?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
reflink: /^!?\[(label)\]\[(ref)\]/,
nolink: /^!?\[(ref)\](?:\[\])?/,
reflinkSearch: 'reflink|nolink(?!\\()',
emStrong: {
lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
// (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left. (5) and (6) can be either Left or Right.
// () Skip orphan inside strong () Consume to delim (1) #*** (2) a***#, a*** (3) #***a, ***a (4) ***# (5) #***# (6) a***a
rDelimAst: /^(?:[^_*\\]|\\.)*?\_\_(?:[^_*\\]|\\.)*?\*(?:[^_*\\]|\\.)*?(?=\_\_)|(?:[^*\\]|\\.)+(?=[^*])|[punct_](\*+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|(?:[^punct*_\s\\]|\\.)(\*+)(?=[^punct*_\s])/,
rDelimUnd: /^(?:[^_*\\]|\\.)*?\*\*(?:[^_*\\]|\\.)*?\_(?:[^_*\\]|\\.)*?(?=\*\*)|(?:[^_\\]|\\.)+(?=[^_])|[punct*](\_+)(?=[\s]|$)|(?:[^punct*_\s\\]|\\.)(\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _
},
code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
br: /^( {2,}|\\)\n(?!\s*$)/,
del: noopTest,
text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
punctuation: /^([\spunctuation])/
};
// list of punctuation marks from CommonMark spec
// without * and _ to handle the different emphasis markers * and _
inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
inline.punctuation = edit(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex();
// sequences em should skip over [title](link), `code`, <html>
inline.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
// lookbehind is not available on Safari as of version 16
// inline.escapedEmSt = /(?<=(?:^|[^\\)(?:\\[^])*)\\[*_]/g;
inline.escapedEmSt = /(?:^|[^\\])(?:\\\\)*\\[*_]/g;
inline._comment = edit(block._comment).replace('(?:-->|$)', '-->').getRegex();
inline.emStrong.lDelim = edit(inline.emStrong.lDelim)
.replace(/punct/g, inline._punctuation)
.getRegex();
inline.emStrong.rDelimAst = edit(inline.emStrong.rDelimAst, 'g')
.replace(/punct/g, inline._punctuation)
.getRegex();
inline.emStrong.rDelimUnd = edit(inline.emStrong.rDelimUnd, 'g')
.replace(/punct/g, inline._punctuation)
.getRegex();
inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/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', inline._comment)
.replace('attribute', inline._attribute)
.getRegex();
inline._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
inline._href = /<(?:\\.|[^\n<>\\])+>|[^\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)
.replace('ref', block._label)
.getRegex();
inline.nolink = edit(inline.nolink)
.replace('ref', block._label)
.getRegex();
inline.reflinkSearch = edit(inline.reflinkSearch, 'g')
.replace('reflink', inline.reflink)
.replace('nolink', inline.nolink)
.getRegex();
/**
* Normal Inline Grammar
*/
inline.normal = merge({}, inline);
/**
* Pedantic Inline Grammar
*/
inline.pedantic = merge({}, inline.normal, {
strong: {
start: /^__|\*\*/,
middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
endAst: /\*\*(?!\*)/g,
endUnd: /__(?!_)/g
},
em: {
start: /^_|\*/,
middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
endAst: /\*(?!\*)/g,
endUnd: /_(?!_)/g
},
link: edit(/^(?:![va]?)?\[(label)\]\((.*?)\)/)
.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~])\1(?=[^~]|$)/,
text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
});
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('\\b_', '\\b_| {2,}\\n')
.replace(/\{2,\}/g, '*')
.getRegex()
});