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// Process html entity - {, ¯, ", ...
import { decodeHTML } from 'entities'
import { isValidEntityCode, fromCodePoint } from '../common/utils.mjs'
const DIGITAL_RE = /^&#((?:x[a-f0-9]{1,6}|[0-9]{1,7}));/i
const NAMED_RE = /^&([a-z][a-z0-9]{1,31});/i
export default function entity (state, silent) {
const pos = state.pos
const max = state.posMax
if (state.src.charCodeAt(pos) !== 0x26/* & */) return false
if (pos + 1 >= max) return false
const ch = state.src.charCodeAt(pos + 1)
if (ch === 0x23 /* # */) {
const match = state.src.slice(pos).match(DIGITAL_RE)
if (match) {
if (!silent) {
const code = match[1][0].toLowerCase() === 'x' ? parseInt(match[1].slice(1), 16) : parseInt(match[1], 10)
const token = state.push('text_special', '', 0)
token.content = isValidEntityCode(code) ? fromCodePoint(code) : fromCodePoint(0xFFFD)
token.markup = match[0]
token.info = 'entity'
}
state.pos += match[0].length
return true
}
} else {
const match = state.src.slice(pos).match(NAMED_RE)
if (match) {
const decoded = decodeHTML(match[0])
if (decoded !== match[0]) {
if (!silent) {
const token = state.push('text_special', '', 0)
token.content = decoded
token.markup = match[0]
token.info = 'entity'
}
state.pos += match[0].length
return true
}
}
}
return false
}
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