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94 lines
2.4 KiB
94 lines
2.4 KiB
// fences (``` lang, ~~~ lang)
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export default function fence (state, startLine, endLine, silent) {
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let pos = state.bMarks[startLine] + state.tShift[startLine]
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let max = state.eMarks[startLine]
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// if it's indented more than 3 spaces, it should be a code block
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if (state.sCount[startLine] - state.blkIndent >= 4) { return false }
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if (pos + 3 > max) { return false }
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const marker = state.src.charCodeAt(pos)
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if (marker !== 0x7E/* ~ */ && marker !== 0x60 /* ` */) {
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return false
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}
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// scan marker length
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let mem = pos
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pos = state.skipChars(pos, marker)
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let len = pos - mem
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if (len < 3) { return false }
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const markup = state.src.slice(mem, pos)
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const params = state.src.slice(pos, max)
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if (marker === 0x60 /* ` */) {
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if (params.indexOf(String.fromCharCode(marker)) >= 0) {
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return false
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}
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}
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// Since start is found, we can report success here in validation mode
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if (silent) { return true }
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// search end of block
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let nextLine = startLine
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let haveEndMarker = false
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for (;;) {
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nextLine++
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if (nextLine >= endLine) {
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// unclosed block should be autoclosed by end of document.
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// also block seems to be autoclosed by end of parent
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break
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}
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pos = mem = state.bMarks[nextLine] + state.tShift[nextLine]
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max = state.eMarks[nextLine]
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if (pos < max && state.sCount[nextLine] < state.blkIndent) {
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// non-empty line with negative indent should stop the list:
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// - ```
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// test
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break
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}
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if (state.src.charCodeAt(pos) !== marker) { continue }
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if (state.sCount[nextLine] - state.blkIndent >= 4) {
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// closing fence should be indented less than 4 spaces
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continue
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}
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pos = state.skipChars(pos, marker)
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// closing code fence must be at least as long as the opening one
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if (pos - mem < len) { continue }
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// make sure tail has spaces only
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pos = state.skipSpaces(pos)
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if (pos < max) { continue }
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haveEndMarker = true
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// found!
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break
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}
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// If a fence has heading spaces, they should be removed from its inner block
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len = state.sCount[startLine]
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state.line = nextLine + (haveEndMarker ? 1 : 0)
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const token = state.push('fence', 'code', 0)
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token.info = params
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token.content = state.getLines(startLine + 1, nextLine, len, true)
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token.markup = markup
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token.map = [startLine, state.line]
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return true
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}
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