103 lines
1.7 KiB
JavaScript
103 lines
1.7 KiB
JavaScript
'use strict'
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module.exports = setextHeading
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var lineFeed = '\n'
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var tab = '\t'
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var space = ' '
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var equalsTo = '='
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var dash = '-'
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var maxIndent = 3
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var equalsToDepth = 1
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var dashDepth = 2
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function setextHeading(eat, value, silent) {
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var self = this
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var now = eat.now()
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var length = value.length
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var index = -1
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var subvalue = ''
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var content
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var queue
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var character
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var marker
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var depth
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// Eat initial indentation.
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while (++index < length) {
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character = value.charAt(index)
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if (character !== space || index >= maxIndent) {
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index--
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break
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}
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subvalue += character
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}
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// Eat content.
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content = ''
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queue = ''
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while (++index < length) {
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character = value.charAt(index)
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if (character === lineFeed) {
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index--
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break
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}
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if (character === space || character === tab) {
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queue += character
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} else {
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content += queue + character
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queue = ''
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}
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}
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now.column += subvalue.length
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now.offset += subvalue.length
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subvalue += content + queue
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// Ensure the content is followed by a newline and a valid marker.
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character = value.charAt(++index)
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marker = value.charAt(++index)
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if (character !== lineFeed || (marker !== equalsTo && marker !== dash)) {
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return
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}
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subvalue += character
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// Eat Setext-line.
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queue = marker
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depth = marker === equalsTo ? equalsToDepth : dashDepth
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while (++index < length) {
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character = value.charAt(index)
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if (character !== marker) {
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if (character !== lineFeed) {
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return
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}
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index--
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break
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}
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queue += character
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}
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if (silent) {
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return true
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}
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return eat(subvalue + queue)({
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type: 'heading',
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depth: depth,
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children: self.tokenizeInline(content, now)
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})
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}
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