50 lines
985 B
JavaScript
50 lines
985 B
JavaScript
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// Parse link label
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//
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// this function assumes that first character ("[") already matches;
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// returns the end of the label
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//
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export default function parseLinkLabel (state, start, disableNested) {
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let level, found, marker, prevPos
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const max = state.posMax
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const oldPos = state.pos
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state.pos = start + 1
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level = 1
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while (state.pos < max) {
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marker = state.src.charCodeAt(state.pos)
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if (marker === 0x5D /* ] */) {
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level--
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if (level === 0) {
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found = true
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break
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}
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}
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prevPos = state.pos
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state.md.inline.skipToken(state)
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if (marker === 0x5B /* [ */) {
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if (prevPos === state.pos - 1) {
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// increase level if we find text `[`, which is not a part of any token
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level++
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} else if (disableNested) {
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state.pos = oldPos
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return -1
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}
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}
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}
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let labelEnd = -1
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if (found) {
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labelEnd = state.pos
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}
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// restore old state
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state.pos = oldPos
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return labelEnd
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}
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