+++ /dev/null
-'use strict';
-
-var decimal = require('is-decimal');
-var alphanumeric = require('is-alphanumeric');
-var whitespace = require('is-whitespace-character');
-var escapes = require('markdown-escapes');
-var prefix = require('./util/entity-prefix-length');
-
-module.exports = factory;
-
-var BACKSLASH = '\\';
-var BULLETS = ['*', '-', '+'];
-var ALLIGNMENT = [':', '-', ' ', '|'];
-var entities = {'<': '<', ':': ':', '&': '&', '|': '|', '~': '~'};
-
-/* Factory to escape characters. */
-function factory(options) {
- return escape;
-
- /* Escape punctuation characters in a node's value. */
- function escape(value, node, parent) {
- var self = this;
- var gfm = options.gfm;
- var commonmark = options.commonmark;
- var pedantic = options.pedantic;
- var markers = commonmark ? ['.', ')'] : ['.'];
- var siblings = parent && parent.children;
- var index = siblings && siblings.indexOf(node);
- var prev = siblings && siblings[index - 1];
- var next = siblings && siblings[index + 1];
- var length = value.length;
- var escapable = escapes(options);
- var position = -1;
- var queue = [];
- var escaped = queue;
- var afterNewLine;
- var character;
- var wordCharBefore;
- var wordCharAfter;
- var offset;
- var replace;
-
- if (prev) {
- afterNewLine = text(prev) && /\n\s*$/.test(prev.value);
- } else {
- afterNewLine = !parent || parent.type === 'root' || parent.type === 'paragraph';
- }
-
- function one(character) {
- return escapable.indexOf(character) === -1 ?
- entities[character] : BACKSLASH + character;
- }
-
- while (++position < length) {
- character = value.charAt(position);
- replace = false;
-
- if (character === '\n') {
- afterNewLine = true;
- } else if (
- character === BACKSLASH ||
- character === '`' ||
- character === '*' ||
- character === '[' ||
- character === '<' ||
- (character === '&' && prefix(value.slice(position)) > 0) ||
- (character === ']' && self.inLink) ||
- (gfm && character === '~' && value.charAt(position + 1) === '~') ||
- (gfm && character === '|' && (self.inTable || alignment(value, position))) ||
- (
- character === '_' &&
- /* Delegate leading/trailing underscores
- * to the multinode version below. */
- position > 0 &&
- position < length - 1 &&
- (
- pedantic ||
- !alphanumeric(value.charAt(position - 1)) ||
- !alphanumeric(value.charAt(position + 1))
- )
- ) ||
- (gfm && !self.inLink && character === ':' && protocol(queue.join('')))
- ) {
- replace = true;
- } else if (afterNewLine) {
- if (
- character === '>' ||
- character === '#' ||
- BULLETS.indexOf(character) !== -1
- ) {
- replace = true;
- } else if (decimal(character)) {
- offset = position + 1;
-
- while (offset < length) {
- if (!decimal(value.charAt(offset))) {
- break;
- }
-
- offset++;
- }
-
- if (markers.indexOf(value.charAt(offset)) !== -1) {
- next = value.charAt(offset + 1);
-
- if (!next || next === ' ' || next === '\t' || next === '\n') {
- queue.push(value.slice(position, offset));
- position = offset;
- character = value.charAt(position);
- replace = true;
- }
- }
- }
- }
-
- if (afterNewLine && !whitespace(character)) {
- afterNewLine = false;
- }
-
- queue.push(replace ? one(character) : character);
- }
-
- /* Multi-node versions. */
- if (siblings && text(node)) {
- /* Check for an opening parentheses after a
- * link-reference (which can be joined by
- * white-space). */
- if (prev && prev.referenceType === 'shortcut') {
- position = -1;
- length = escaped.length;
-
- while (++position < length) {
- character = escaped[position];
-
- if (character === ' ' || character === '\t') {
- continue;
- }
-
- if (character === '(' || character === ':') {
- escaped[position] = one(character);
- }
-
- break;
- }
-
- /* If the current node is all spaces / tabs,
- * preceded by a shortcut, and followed by
- * a text starting with `(`, escape it. */
- if (
- text(next) &&
- position === length &&
- next.value.charAt(0) === '('
- ) {
- escaped.push(BACKSLASH);
- }
- }
-
- /* Ensure non-auto-links are not seen as links.
- * This pattern needs to check the preceding
- * nodes too. */
- if (
- gfm &&
- !self.inLink &&
- text(prev) &&
- value.charAt(0) === ':' &&
- protocol(prev.value.slice(-6))
- ) {
- escaped[0] = one(':');
- }
-
- /* Escape ampersand if it would otherwise
- * start an entity. */
- if (
- text(next) &&
- value.charAt(length - 1) === '&' &&
- prefix('&' + next.value) !== 0
- ) {
- escaped[escaped.length - 1] = one('&');
- }
-
- /* Escape double tildes in GFM. */
- if (
- gfm &&
- text(next) &&
- value.charAt(length - 1) === '~' &&
- next.value.charAt(0) === '~'
- ) {
- escaped.splice(escaped.length - 1, 0, BACKSLASH);
- }
-
- /* Escape underscores, but not mid-word (unless
- * in pedantic mode). */
- wordCharBefore = text(prev) && alphanumeric(prev.value.slice(-1));
- wordCharAfter = text(next) && alphanumeric(next.value.charAt(0));
-
- if (length === 1) {
- if (value === '_' && (pedantic || !wordCharBefore || !wordCharAfter)) {
- escaped.unshift(BACKSLASH);
- }
- } else {
- if (
- value.charAt(0) === '_' &&
- (pedantic || !wordCharBefore || !alphanumeric(value.charAt(1)))
- ) {
- escaped.unshift(BACKSLASH);
- }
-
- if (
- value.charAt(length - 1) === '_' &&
- (pedantic || !wordCharAfter || !alphanumeric(value.charAt(length - 2)))
- ) {
- escaped.splice(escaped.length - 1, 0, BACKSLASH);
- }
- }
- }
-
- return escaped.join('');
- }
-}
-
-/* Check if `index` in `value` is inside an alignment row. */
-function alignment(value, index) {
- var start = value.lastIndexOf('\n', index);
- var end = value.indexOf('\n', index);
-
- start = start === -1 ? -1 : start;
- end = end === -1 ? value.length : end;
-
- while (++start < end) {
- if (ALLIGNMENT.indexOf(value.charAt(start)) === -1) {
- return false;
- }
- }
-
- return true;
-}
-
-/* Check if `node` is a text node. */
-function text(node) {
- return node && node.type === 'text';
-}
-
-/* Check if `value` ends in a protocol. */
-function protocol(value) {
- var val = value.slice(-6).toLowerCase();
- return val === 'mailto' || val.slice(-5) === 'https' || val.slice(-4) === 'http';
-}
projects / dotfiles / .git / blobdiff