61 lines
1.4 KiB
JavaScript
61 lines
1.4 KiB
JavaScript
// Process ^superscript^
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// same as UNESCAPE_MD_RE plus a space
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const UNESCAPE_RE = /\\([ \\!"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])/g
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function superscript (state, silent) {
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const max = state.posMax
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const start = state.pos
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if (state.src.charCodeAt(start) !== 0x5E/* ^ */) { return false }
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if (silent) { return false } // don't run any pairs in validation mode
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if (start + 2 >= max) { return false }
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state.pos = start + 1
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let found = false
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while (state.pos < max) {
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if (state.src.charCodeAt(state.pos) === 0x5E/* ^ */) {
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found = true
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break
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}
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state.md.inline.skipToken(state)
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}
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if (!found || start + 1 === state.pos) {
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state.pos = start
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return false
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}
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const content = state.src.slice(start + 1, state.pos)
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// don't allow unescaped spaces/newlines inside
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if (content.match(/(^|[^\\])(\\\\)*\s/)) {
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state.pos = start
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return false
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}
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// found!
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state.posMax = state.pos
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state.pos = start + 1
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// Earlier we checked !silent, but this implementation does not need it
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const token_so = state.push('sup_open', 'sup', 1)
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token_so.markup = '^'
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const token_t = state.push('text', '', 0)
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token_t.content = content.replace(UNESCAPE_RE, '$1')
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const token_sc = state.push('sup_close', 'sup', -1)
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token_sc.markup = '^'
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state.pos = state.posMax + 1
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state.posMax = max
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return true
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}
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export default function sup_plugin (md) {
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md.inline.ruler.after('emphasis', 'sup', superscript)
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};
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