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118 lines
3.0 KiB
JavaScript
118 lines
3.0 KiB
JavaScript
'use strict'
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var markdownLineEnding = require('../character/markdown-line-ending.js')
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var shallow = require('../util/shallow.js')
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var factorySpace = require('./factory-space.js')
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var setextUnderline = {
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name: 'setextUnderline',
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tokenize: tokenizeSetextUnderline,
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resolveTo: resolveToSetextUnderline
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}
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function resolveToSetextUnderline(events, context) {
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var index = events.length
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var content
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var text
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var definition
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var heading // Find the opening of the content.
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// It’ll always exist: we don’t tokenize if it isn’t there.
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while (index--) {
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if (events[index][0] === 'enter') {
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if (events[index][1].type === 'content') {
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content = index
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break
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}
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if (events[index][1].type === 'paragraph') {
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text = index
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}
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} // Exit
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else {
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if (events[index][1].type === 'content') {
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// Remove the content end (if needed we’ll add it later)
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events.splice(index, 1)
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}
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if (!definition && events[index][1].type === 'definition') {
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definition = index
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}
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}
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}
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heading = {
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type: 'setextHeading',
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start: shallow(events[text][1].start),
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end: shallow(events[events.length - 1][1].end)
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} // Change the paragraph to setext heading text.
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events[text][1].type = 'setextHeadingText' // If we have definitions in the content, we’ll keep on having content,
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// but we need move it.
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if (definition) {
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events.splice(text, 0, ['enter', heading, context])
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events.splice(definition + 1, 0, ['exit', events[content][1], context])
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events[content][1].end = shallow(events[definition][1].end)
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} else {
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events[content][1] = heading
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} // Add the heading exit at the end.
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events.push(['exit', heading, context])
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return events
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}
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function tokenizeSetextUnderline(effects, ok, nok) {
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var self = this
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var index = self.events.length
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var marker
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var paragraph // Find an opening.
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while (index--) {
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// Skip enter/exit of line ending, line prefix, and content.
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// We can now either have a definition or a paragraph.
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if (
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self.events[index][1].type !== 'lineEnding' &&
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self.events[index][1].type !== 'linePrefix' &&
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self.events[index][1].type !== 'content'
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) {
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paragraph = self.events[index][1].type === 'paragraph'
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break
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}
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}
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return start
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function start(code) {
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if (!self.lazy && (self.interrupt || paragraph)) {
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effects.enter('setextHeadingLine')
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effects.enter('setextHeadingLineSequence')
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marker = code
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return closingSequence(code)
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}
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return nok(code)
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}
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function closingSequence(code) {
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if (code === marker) {
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effects.consume(code)
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return closingSequence
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}
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effects.exit('setextHeadingLineSequence')
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return factorySpace(effects, closingSequenceEnd, 'lineSuffix')(code)
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}
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function closingSequenceEnd(code) {
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if (code === null || markdownLineEnding(code)) {
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effects.exit('setextHeadingLine')
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return ok(code)
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}
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return nok(code)
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}
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}
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module.exports = setextUnderline
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