|
|
|
// Utilities
|
|
|
|
//
|
|
|
|
|
|
|
|
import * as mdurl from 'mdurl'
|
|
|
|
import * as ucmicro from 'uc.micro'
|
|
|
|
import { decodeHTML } from 'entities'
|
|
|
|
|
|
|
|
function _class (obj) { return Object.prototype.toString.call(obj) }
|
|
|
|
|
|
|
|
function isString (obj) { return _class(obj) === '[object String]' }
|
|
|
|
|
|
|
|
const _hasOwnProperty = Object.prototype.hasOwnProperty
|
|
|
|
|
|
|
|
function has (object, key) {
|
|
|
|
return _hasOwnProperty.call(object, key)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Merge objects
|
|
|
|
//
|
|
|
|
function assign (obj /* from1, from2, from3, ... */) {
|
|
|
|
const sources = Array.prototype.slice.call(arguments, 1)
|
|
|
|
|
|
|
|
sources.forEach(function (source) {
|
|
|
|
if (!source) { return }
|
|
|
|
|
|
|
|
if (typeof source !== 'object') {
|
|
|
|
throw new TypeError(source + 'must be object')
|
|
|
|
}
|
|
|
|
|
|
|
|
Object.keys(source).forEach(function (key) {
|
|
|
|
obj[key] = source[key]
|
|
|
|
})
|
|
|
|
})
|
|
|
|
|
|
|
|
return obj
|
|
|
|
}
|
|
|
|
|
|
|
|
// Remove element from array and put another array at those position.
|
|
|
|
// Useful for some operations with tokens
|
|
|
|
function arrayReplaceAt (src, pos, newElements) {
|
|
|
|
return [].concat(src.slice(0, pos), newElements, src.slice(pos + 1))
|
|
|
|
}
|
|
|
|
|
|
|
|
function isValidEntityCode (c) {
|
|
|
|
/* eslint no-bitwise:0 */
|
|
|
|
// broken sequence
|
|
|
|
if (c >= 0xD800 && c <= 0xDFFF) { return false }
|
|
|
|
// never used
|
|
|
|
if (c >= 0xFDD0 && c <= 0xFDEF) { return false }
|
|
|
|
if ((c & 0xFFFF) === 0xFFFF || (c & 0xFFFF) === 0xFFFE) { return false }
|
|
|
|
// control codes
|
|
|
|
if (c >= 0x00 && c <= 0x08) { return false }
|
|
|
|
if (c === 0x0B) { return false }
|
|
|
|
if (c >= 0x0E && c <= 0x1F) { return false }
|
|
|
|
if (c >= 0x7F && c <= 0x9F) { return false }
|
|
|
|
// out of range
|
|
|
|
if (c > 0x10FFFF) { return false }
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
|
|
|
|
function fromCodePoint (c) {
|
|
|
|
/* eslint no-bitwise:0 */
|
|
|
|
if (c > 0xffff) {
|
|
|
|
c -= 0x10000
|
|
|
|
const surrogate1 = 0xd800 + (c >> 10)
|
|
|
|
const surrogate2 = 0xdc00 + (c & 0x3ff)
|
|
|
|
|
|
|
|
return String.fromCharCode(surrogate1, surrogate2)
|
|
|
|
}
|
|
|
|
return String.fromCharCode(c)
|
|
|
|
}
|
|
|
|
|
|
|
|
const UNESCAPE_MD_RE = /\\([!"#$%&'()*+,\-./:;<=>?@[\\\]^_`{|}~])/g
|
|
|
|
const ENTITY_RE = /&([a-z#][a-z0-9]{1,31});/gi
|
|
|
|
const UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + '|' + ENTITY_RE.source, 'gi')
|
|
|
|
|
|
|
|
const DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))$/i
|
|
|
|
|
|
|
|
function replaceEntityPattern (match, name) {
|
|
|
|
if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
|
|
|
|
const code = name[1].toLowerCase() === 'x'
|
|
|
|
? parseInt(name.slice(2), 16)
|
|
|
|
: parseInt(name.slice(1), 10)
|
|
|
|
|
|
|
|
if (isValidEntityCode(code)) {
|
|
|
|
return fromCodePoint(code)
|
|
|
|
}
|
|
|
|
|
|
|
|
return match
|
|
|
|
}
|
|
|
|
|
|
|
|
const decoded = decodeHTML(match)
|
|
|
|
if (decoded !== match) {
|
|
|
|
return decoded
|
|
|
|
}
|
|
|
|
|
|
|
|
return match
|
|
|
|
}
|
|
|
|
|
|
|
|
/* function replaceEntities(str) {
|
|
|
|
if (str.indexOf('&') < 0) { return str; }
|
|
|
|
|
|
|
|
return str.replace(ENTITY_RE, replaceEntityPattern);
|
|
|
|
} */
|
|
|
|
|
|
|
|
function unescapeMd (str) {
|
|
|
|
if (str.indexOf('\\') < 0) { return str }
|
|
|
|
return str.replace(UNESCAPE_MD_RE, '$1')
|
|
|
|
}
|
|
|
|
|
|
|
|
function unescapeAll (str) {
|
|
|
|
if (str.indexOf('\\') < 0 && str.indexOf('&') < 0) { return str }
|
|
|
|
|
|
|
|
return str.replace(UNESCAPE_ALL_RE, function (match, escaped, entity) {
|
|
|
|
if (escaped) { return escaped }
|
|
|
|
return replaceEntityPattern(match, entity)
|
|
|
|
})
|
|
|
|
}
|
|
|
|
|
|
|
|
const HTML_ESCAPE_TEST_RE = /[&<>"]/
|
|
|
|
const HTML_ESCAPE_REPLACE_RE = /[&<>"]/g
|
|
|
|
const HTML_REPLACEMENTS = {
|
|
|
|
'&': '&',
|
|
|
|
'<': '<',
|
|
|
|
'>': '>',
|
|
|
|
'"': '"'
|
|
|
|
}
|
|
|
|
|
|
|
|
function replaceUnsafeChar (ch) {
|
|
|
|
return HTML_REPLACEMENTS[ch]
|
|
|
|
}
|
|
|
|
|
|
|
|
function escapeHtml (str) {
|
|
|
|
if (HTML_ESCAPE_TEST_RE.test(str)) {
|
|
|
|
return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar)
|
|
|
|
}
|
|
|
|
return str
|
|
|
|
}
|
|
|
|
|
|
|
|
const REGEXP_ESCAPE_RE = /[.?*+^$[\]\\(){}|-]/g
|
|
|
|
|
|
|
|
function escapeRE (str) {
|
|
|
|
return str.replace(REGEXP_ESCAPE_RE, '\\$&')
|
|
|
|
}
|
|
|
|
|
|
|
|
function isSpace (code) {
|
|
|
|
switch (code) {
|
|
|
|
case 0x09:
|
|
|
|
case 0x20:
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
|
|
|
// Zs (unicode class) || [\t\f\v\r\n]
|
|
|
|
function isWhiteSpace (code) {
|
|
|
|
if (code >= 0x2000 && code <= 0x200A) { return true }
|
|
|
|
switch (code) {
|
|
|
|
case 0x09: // \t
|
|
|
|
case 0x0A: // \n
|
|
|
|
case 0x0B: // \v
|
|
|
|
case 0x0C: // \f
|
|
|
|
case 0x0D: // \r
|
|
|
|
case 0x20:
|
|
|
|
case 0xA0:
|
|
|
|
case 0x1680:
|
|
|
|
case 0x202F:
|
|
|
|
case 0x205F:
|
|
|
|
case 0x3000:
|
|
|
|
return true
|
|
|
|
}
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
|
|
|
|
/* eslint-disable max-len */
|
|
|
|
|
|
|
|
// Currently without astral characters support.
|
|
|
|
function isPunctChar (ch) {
|
|
|
|
return ucmicro.P.test(ch)
|
|
|
|
}
|
|
|
|
|
|
|
|
// Markdown ASCII punctuation characters.
|
|
|
|
//
|
|
|
|
// !, ", #, $, %, &, ', (, ), *, +, ,, -, ., /, :, ;, <, =, >, ?, @, [, \, ], ^, _, `, {, |, }, or ~
|
|
|
|
// http://spec.commonmark.org/0.15/#ascii-punctuation-character
|
|
|
|
//
|
|
|
|
// Don't confuse with unicode punctuation !!! It lacks some chars in ascii range.
|
|
|
|
//
|
|
|
|
function isMdAsciiPunct (ch) {
|
|
|
|
switch (ch) {
|
|
|
|
case 0x21/* ! */:
|
|
|
|
case 0x22/* " */:
|
|
|
|
case 0x23/* # */:
|
|
|
|
case 0x24/* $ */:
|
|
|
|
case 0x25/* % */:
|
|
|
|
case 0x26/* & */:
|
|
|
|
case 0x27/* ' */:
|
|
|
|
case 0x28/* ( */:
|
|
|
|
case 0x29/* ) */:
|
|
|
|
case 0x2A/* * */:
|
|
|
|
case 0x2B/* + */:
|
|
|
|
case 0x2C/* , */:
|
|
|
|
case 0x2D/* - */:
|
|
|
|
case 0x2E/* . */:
|
|
|
|
case 0x2F/* / */:
|
|
|
|
case 0x3A/* : */:
|
|
|
|
case 0x3B/* ; */:
|
|
|
|
case 0x3C/* < */:
|
|
|
|
case 0x3D/* = */:
|
|
|
|
case 0x3E/* > */:
|
|
|
|
case 0x3F/* ? */:
|
|
|
|
case 0x40/* @ */:
|
|
|
|
case 0x5B/* [ */:
|
|
|
|
case 0x5C/* \ */:
|
|
|
|
case 0x5D/* ] */:
|
|
|
|
case 0x5E/* ^ */:
|
|
|
|
case 0x5F/* _ */:
|
|
|
|
case 0x60/* ` */:
|
|
|
|
case 0x7B/* { */:
|
|
|
|
case 0x7C/* | */:
|
|
|
|
case 0x7D/* } */:
|
|
|
|
case 0x7E/* ~ */:
|
|
|
|
return true
|
|
|
|
default:
|
|
|
|
return false
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Hepler to unify [reference labels].
|
|
|
|
//
|
|
|
|
function normalizeReference (str) {
|
|
|
|
// Trim and collapse whitespace
|
|
|
|
//
|
|
|
|
str = str.trim().replace(/\s+/g, ' ')
|
|
|
|
|
|
|
|
// In node v10 'ẞ'.toLowerCase() === 'Ṿ', which is presumed to be a bug
|
|
|
|
// fixed in v12 (couldn't find any details).
|
|
|
|
//
|
|
|
|
// So treat this one as a special case
|
|
|
|
// (remove this when node v10 is no longer supported).
|
|
|
|
//
|
|
|
|
if ('ẞ'.toLowerCase() === 'Ṿ') {
|
|
|
|
str = str.replace(/ẞ/g, 'ß')
|
|
|
|
}
|
|
|
|
|
|
|
|
// .toLowerCase().toUpperCase() should get rid of all differences
|
|
|
|
// between letter variants.
|
|
|
|
//
|
|
|
|
// Simple .toLowerCase() doesn't normalize 125 code points correctly,
|
|
|
|
// and .toUpperCase doesn't normalize 6 of them (list of exceptions:
|
|
|
|
// İ, ϴ, ẞ, Ω, K, Å - those are already uppercased, but have differently
|
|
|
|
// uppercased versions).
|
|
|
|
//
|
|
|
|
// Here's an example showing how it happens. Lets take greek letter omega:
|
|
|
|
// uppercase U+0398 (Θ), U+03f4 (ϴ) and lowercase U+03b8 (θ), U+03d1 (ϑ)
|
|
|
|
//
|
|
|
|
// Unicode entries:
|
|
|
|
// 0398;GREEK CAPITAL LETTER THETA;Lu;0;L;;;;;N;;;;03B8;
|
|
|
|
// 03B8;GREEK SMALL LETTER THETA;Ll;0;L;;;;;N;;;0398;;0398
|
|
|
|
// 03D1;GREEK THETA SYMBOL;Ll;0;L;<compat> 03B8;;;;N;GREEK SMALL LETTER SCRIPT THETA;;0398;;0398
|
|
|
|
// 03F4;GREEK CAPITAL THETA SYMBOL;Lu;0;L;<compat> 0398;;;;N;;;;03B8;
|
|
|
|
//
|
|
|
|
// Case-insensitive comparison should treat all of them as equivalent.
|
|
|
|
//
|
|
|
|
// But .toLowerCase() doesn't change ϑ (it's already lowercase),
|
|
|
|
// and .toUpperCase() doesn't change ϴ (already uppercase).
|
|
|
|
//
|
|
|
|
// Applying first lower then upper case normalizes any character:
|
|
|
|
// '\u0398\u03f4\u03b8\u03d1'.toLowerCase().toUpperCase() === '\u0398\u0398\u0398\u0398'
|
|
|
|
//
|
|
|
|
// Note: this is equivalent to unicode case folding; unicode normalization
|
|
|
|
// is a different step that is not required here.
|
|
|
|
//
|
|
|
|
// Final result should be uppercased, because it's later stored in an object
|
|
|
|
// (this avoid a conflict with Object.prototype members,
|
|
|
|
// most notably, `__proto__`)
|
|
|
|
//
|
|
|
|
return str.toLowerCase().toUpperCase()
|
|
|
|
}
|
|
|
|
|
|
|
|
// Re-export libraries commonly used in both markdown-it and its plugins,
|
|
|
|
// so plugins won't have to depend on them explicitly, which reduces their
|
|
|
|
// bundled size (e.g. a browser build).
|
|
|
|
//
|
|
|
|
const lib = { mdurl, ucmicro }
|
|
|
|
|
|
|
|
export {
|
|
|
|
lib,
|
|
|
|
assign,
|
|
|
|
isString,
|
|
|
|
has,
|
|
|
|
unescapeMd,
|
|
|
|
unescapeAll,
|
|
|
|
isValidEntityCode,
|
|
|
|
fromCodePoint,
|
|
|
|
escapeHtml,
|
|
|
|
arrayReplaceAt,
|
|
|
|
isSpace,
|
|
|
|
isWhiteSpace,
|
|
|
|
isMdAsciiPunct,
|
|
|
|
isPunctChar,
|
|
|
|
escapeRE,
|
|
|
|
normalizeReference
|
|
|
|
}
|