61 lines
1.1 KiB
JavaScript
61 lines
1.1 KiB
JavaScript
'use strict'
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var whitespace = require('is-whitespace-character')
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var locate = require('../locate/delete')
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module.exports = strikethrough
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strikethrough.locator = locate
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var tilde = '~'
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var fence = '~~'
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function strikethrough(eat, value, silent) {
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var self = this
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var character = ''
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var previous = ''
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var preceding = ''
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var subvalue = ''
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var index
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var length
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var now
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if (
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!self.options.gfm ||
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value.charAt(0) !== tilde ||
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value.charAt(1) !== tilde ||
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whitespace(value.charAt(2))
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) {
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return
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}
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index = 1
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length = value.length
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now = eat.now()
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now.column += 2
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now.offset += 2
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while (++index < length) {
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character = value.charAt(index)
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if (
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character === tilde &&
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previous === tilde &&
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(!preceding || !whitespace(preceding))
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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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return eat(fence + subvalue + fence)({
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type: 'delete',
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children: self.tokenizeInline(subvalue, now)
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})
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}
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subvalue += previous
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preceding = previous
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previous = character
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}
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}
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