118 lines
2.5 KiB
JavaScript
118 lines
2.5 KiB
JavaScript
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'use strict'
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var trim = require('trim')
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var decimal = require('is-decimal')
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var trimTrailingLines = require('trim-trailing-lines')
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var interrupt = require('../util/interrupt')
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module.exports = paragraph
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var tab = '\t'
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var lineFeed = '\n'
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var space = ' '
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var tabSize = 4
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// Tokenise paragraph.
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function paragraph(eat, value, silent) {
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var self = this
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var settings = self.options
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var commonmark = settings.commonmark
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var gfm = settings.gfm
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var tokenizers = self.blockTokenizers
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var interruptors = self.interruptParagraph
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var index = value.indexOf(lineFeed)
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var length = value.length
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var position
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var subvalue
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var character
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var size
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var now
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while (index < length) {
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// Eat everything if there’s no following newline.
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if (index === -1) {
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index = length
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break
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}
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// Stop if the next character is NEWLINE.
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if (value.charAt(index + 1) === lineFeed) {
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break
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}
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// In commonmark-mode, following indented lines are part of the paragraph.
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if (commonmark) {
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size = 0
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position = index + 1
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while (position < length) {
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character = value.charAt(position)
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if (character === tab) {
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size = tabSize
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break
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} else if (character === space) {
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size++
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} else {
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break
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}
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position++
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}
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if (size >= tabSize && character !== lineFeed) {
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index = value.indexOf(lineFeed, index + 1)
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continue
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}
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}
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subvalue = value.slice(index + 1)
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// Check if the following code contains a possible block.
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if (interrupt(interruptors, tokenizers, self, [eat, subvalue, true])) {
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break
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}
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// Break if the following line starts a list, when already in a list, or
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// when in commonmark, or when in gfm mode and the bullet is *not* numeric.
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if (
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tokenizers.list.call(self, eat, subvalue, true) &&
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(self.inList ||
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commonmark ||
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(gfm && !decimal(trim.left(subvalue).charAt(0))))
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) {
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break
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}
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position = index
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index = value.indexOf(lineFeed, index + 1)
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if (index !== -1 && trim(value.slice(position, index)) === '') {
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index = position
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break
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}
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}
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subvalue = value.slice(0, index)
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if (trim(subvalue) === '') {
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eat(subvalue)
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return null
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}
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/* istanbul ignore if - never used (yet) */
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if (silent) {
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return true
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}
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now = eat.now()
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subvalue = trimTrailingLines(subvalue)
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return eat(subvalue)({
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type: 'paragraph',
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children: self.tokenizeInline(subvalue, now)
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})
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}
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