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1 files changed, 275 insertions, 0 deletions

diff --git a/node_modules/markdown-it/lib/common/utils.js b/node_modules/markdown-it/lib/common/utils.js
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index 00000000..a2f9540a
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+++ b/node_modules/markdown-it/lib/common/utils.js
@@ -0,0 +1,275 @@
+// Utilities
+//
+'use strict';
+
+
+function _class(obj) { return Object.prototype.toString.call(obj); }
+
+function isString(obj) { return _class(obj) === '[object String]'; }
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function has(object, key) {
+  return _hasOwnProperty.call(object, key);
+}
+
+// Merge objects
+//
+function assign(obj /*from1, from2, from3, ...*/) {
+  var 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;
+    var surrogate1 = 0xd800 + (c >> 10),
+        surrogate2 = 0xdc00 + (c & 0x3ff);
+
+    return String.fromCharCode(surrogate1, surrogate2);
+  }
+  return String.fromCharCode(c);
+}
+
+
+var UNESCAPE_MD_RE  = /\\([!"#$%&'()*+,\-.\/:;<=>?@[\\\]^_`{|}~])/g;
+var ENTITY_RE       = /&([a-z#][a-z0-9]{1,31});/gi;
+var UNESCAPE_ALL_RE = new RegExp(UNESCAPE_MD_RE.source + '|' + ENTITY_RE.source, 'gi');
+
+var DIGITAL_ENTITY_TEST_RE = /^#((?:x[a-f0-9]{1,8}|[0-9]{1,8}))/i;
+
+var entities = require('./entities');
+
+function replaceEntityPattern(match, name) {
+  var code = 0;
+
+  if (has(entities, name)) {
+    return entities[name];
+  }
+
+  if (name.charCodeAt(0) === 0x23/* # */ && DIGITAL_ENTITY_TEST_RE.test(name)) {
+    code = name[1].toLowerCase() === 'x' ?
+      parseInt(name.slice(2), 16)
+    :
+      parseInt(name.slice(1), 10);
+    if (isValidEntityCode(code)) {
+      return fromCodePoint(code);
+    }
+  }
+
+  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, '$1');
+}
+
+function unescapeAll(str) {
+  if (str.indexOf('\\') < 0 && str.indexOf('&') < 0) { return str; }
+
+  return str.replace(UNESCAPE_ALL_RE, function (match, escaped, entity) {
+    if (escaped) { return escaped; }
+    return replaceEntityPattern(match, entity);
+  });
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+var HTML_ESCAPE_TEST_RE = /[&<>"]/;
+var HTML_ESCAPE_REPLACE_RE = /[&<>"]/g;
+var HTML_REPLACEMENTS = {
+  '&': '&amp;',
+  '<': '&lt;',
+  '>': '&gt;',
+  '"': '&quot;'
+};
+
+function replaceUnsafeChar(ch) {
+  return HTML_REPLACEMENTS[ch];
+}
+
+function escapeHtml(str) {
+  if (HTML_ESCAPE_TEST_RE.test(str)) {
+    return str.replace(HTML_ESCAPE_REPLACE_RE, replaceUnsafeChar);
+  }
+  return str;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+
+var REGEXP_ESCAPE_RE = /[.?*+^$[\]\\(){}|-]/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*/
+var UNICODE_PUNCT_RE = require('uc.micro/categories/P/regex');
+
+// Currently without astral characters support.
+function isPunctChar(ch) {
+  return UNICODE_PUNCT_RE.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) {
+  // use .toUpperCase() instead of .toLowerCase()
+  // here to avoid a conflict with Object.prototype
+  // members (most notably, `__proto__`)
+  return str.trim().replace(/\s+/g, ' ').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).
+//
+exports.lib                 = {};
+exports.lib.mdurl           = require('mdurl');
+exports.lib.ucmicro         = require('uc.micro');
+
+exports.assign              = assign;
+exports.isString            = isString;
+exports.has                 = has;
+exports.unescapeMd          = unescapeMd;
+exports.unescapeAll         = unescapeAll;
+exports.isValidEntityCode   = isValidEntityCode;
+exports.fromCodePoint       = fromCodePoint;
+// exports.replaceEntities     = replaceEntities;
+exports.escapeHtml          = escapeHtml;
+exports.arrayReplaceAt      = arrayReplaceAt;
+exports.isSpace             = isSpace;
+exports.isWhiteSpace        = isWhiteSpace;
+exports.isMdAsciiPunct      = isMdAsciiPunct;
+exports.isPunctChar         = isPunctChar;
+exports.escapeRE            = escapeRE;
+exports.normalizeReference  = normalizeReference;