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marked.js
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marked.js
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const Lexer = require('./Lexer.js');
const Parser = require('./Parser.js');
const Tokenizer = require('./Tokenizer.js');
const Renderer = require('./Renderer.js');
const TextRenderer = require('./TextRenderer.js');
const Slugger = require('./Slugger.js');
const {
merge,
checkSanitizeDeprecation,
escape
} = require('./helpers.js');
const {
getDefaults,
changeDefaults,
defaults
} = require('./defaults.js');
/**
* 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 {
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;
}
try {
const tokens = Lexer.lex(src, opt);
if (opt.walkTokens) {
marked.walkTokens(tokens, opt.walkTokens);
}
return Parser.parse(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;
}
}
/**
* 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(extension) {
const opts = merge({}, extension);
if (extension.renderer) {
const renderer = marked.defaults.renderer || new Renderer();
for (const prop in extension.renderer) {
const prevRenderer = renderer[prop];
renderer[prop] = (...args) => {
let ret = extension.renderer[prop].apply(renderer, args);
if (ret === false) {
ret = prevRenderer.apply(renderer, args);
}
return ret;
};
}
opts.renderer = renderer;
}
if (extension.tokenizer) {
const tokenizer = marked.defaults.tokenizer || new Tokenizer();
for (const prop in extension.tokenizer) {
const prevTokenizer = tokenizer[prop];
tokenizer[prop] = (...args) => {
let ret = extension.tokenizer[prop].apply(tokenizer, args);
if (ret === false) {
ret = prevTokenizer.apply(tokenizer, args);
}
return ret;
};
}
opts.tokenizer = tokenizer;
}
if (extension.walkTokens) {
const walkTokens = marked.defaults.walkTokens;
opts.walkTokens = (token) => {
extension.walkTokens(token);
if (walkTokens) {
walkTokens(token);
}
};
}
marked.setOptions(opts);
};
/**
* Run callback for every token
*/
marked.walkTokens = function(tokens, callback) {
for (const token of tokens) {
callback(token);
switch (token.type) {
case 'table': {
for (const cell of token.tokens.header) {
marked.walkTokens(cell, callback);
}
for (const row of token.tokens.cells) {
for (const cell of row) {
marked.walkTokens(cell, callback);
}
}
break;
}
case 'list': {
marked.walkTokens(token.items, callback);
break;
}
default: {
if (token.tokens) {
marked.walkTokens(token.tokens, callback);
}
}
}
}
};
/**
* Parse Inline
*/
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;
module.exports = marked;