78 lines
2.1 KiB
Plaintext
78 lines
2.1 KiB
Plaintext
/**
|
||
* @typedef {import('mdast').InlineCode} InlineCode
|
||
* @typedef {import('mdast').Parents} Parents
|
||
* @typedef {import('../types.js').State} State
|
||
*/
|
||
|
||
inlineCode.peek = inlineCodePeek
|
||
|
||
/**
|
||
* @param {InlineCode} node
|
||
* @param {Parents | undefined} _
|
||
* @param {State} state
|
||
* @returns {string}
|
||
*/
|
||
export function inlineCode(node, _, state) {
|
||
let value = node.value || ''
|
||
let sequence = '`'
|
||
let index = -1
|
||
|
||
// If there is a single grave accent on its own in the code, use a fence of
|
||
// two.
|
||
// If there are two in a row, use one.
|
||
while (new RegExp('(^|[^`])' + sequence + '([^`]|$)').test(value)) {
|
||
sequence += '`'
|
||
}
|
||
|
||
// If this is not just spaces or eols (tabs don’t count), and either the
|
||
// first or last character are a space, eol, or tick, then pad with spaces.
|
||
if (
|
||
/[^ \r\n]/.test(value) &&
|
||
((/^[ \r\n]/.test(value) && /[ \r\n]$/.test(value)) || /^`|`$/.test(value))
|
||
) {
|
||
value = ' ' + value + ' '
|
||
}
|
||
|
||
// We have a potential problem: certain characters after eols could result in
|
||
// blocks being seen.
|
||
// For example, if someone injected the string `'\n# b'`, then that would
|
||
// result in an ATX heading.
|
||
// We can’t escape characters in `inlineCode`, but because eols are
|
||
// transformed to spaces when going from markdown to HTML anyway, we can swap
|
||
// them out.
|
||
while (++index < state.unsafe.length) {
|
||
const pattern = state.unsafe[index]
|
||
const expression = state.compilePattern(pattern)
|
||
/** @type {RegExpExecArray | null} */
|
||
let match
|
||
|
||
// Only look for `atBreak`s.
|
||
// Btw: note that `atBreak` patterns will always start the regex at LF or
|
||
// CR.
|
||
if (!pattern.atBreak) continue
|
||
|
||
while ((match = expression.exec(value))) {
|
||
let position = match.index
|
||
|
||
// Support CRLF (patterns only look for one of the characters).
|
||
if (
|
||
value.charCodeAt(position) === 10 /* `\n` */ &&
|
||
value.charCodeAt(position - 1) === 13 /* `\r` */
|
||
) {
|
||
position--
|
||
}
|
||
|
||
value = value.slice(0, position) + ' ' + value.slice(match.index + 1)
|
||
}
|
||
}
|
||
|
||
return sequence + value + sequence
|
||
}
|
||
|
||
/**
|
||
* @returns {string}
|
||
*/
|
||
function inlineCodePeek() {
|
||
return '`'
|
||
}
|