planning

node_modules/micromark/dist/tokenize/label-end.js

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+'use strict'
+
+var markdownLineEndingOrSpace = require('../character/markdown-line-ending-or-space.js')
+var chunkedPush = require('../util/chunked-push.js')
+var chunkedSplice = require('../util/chunked-splice.js')
+var normalizeIdentifier = require('../util/normalize-identifier.js')
+var resolveAll = require('../util/resolve-all.js')
+var shallow = require('../util/shallow.js')
+var factoryDestination = require('./factory-destination.js')
+var factoryLabel = require('./factory-label.js')
+var factoryTitle = require('./factory-title.js')
+var factoryWhitespace = require('./factory-whitespace.js')
+
+var labelEnd = {
+  name: 'labelEnd',
+  tokenize: tokenizeLabelEnd,
+  resolveTo: resolveToLabelEnd,
+  resolveAll: resolveAllLabelEnd
+}
+var resourceConstruct = {
+  tokenize: tokenizeResource
+}
+var fullReferenceConstruct = {
+  tokenize: tokenizeFullReference
+}
+var collapsedReferenceConstruct = {
+  tokenize: tokenizeCollapsedReference
+}
+
+function resolveAllLabelEnd(events) {
+  var index = -1
+  var token
+
+  while (++index < events.length) {
+    token = events[index][1]
+
+    if (
+      !token._used &&
+      (token.type === 'labelImage' ||
+        token.type === 'labelLink' ||
+        token.type === 'labelEnd')
+    ) {
+      // Remove the marker.
+      events.splice(index + 1, token.type === 'labelImage' ? 4 : 2)
+      token.type = 'data'
+      index++
+    }
+  }
+
+  return events
+}
+
+function resolveToLabelEnd(events, context) {
+  var index = events.length
+  var offset = 0
+  var group
+  var label
+  var text
+  var token
+  var open
+  var close
+  var media // Find an opening.
+
+  while (index--) {
+    token = events[index][1]
+
+    if (open) {
+      // If we see another link, or inactive link label, we’ve been here before.
+      if (
+        token.type === 'link' ||
+        (token.type === 'labelLink' && token._inactive)
+      ) {
+        break
+      } // Mark other link openings as inactive, as we can’t have links in
+      // links.
+
+      if (events[index][0] === 'enter' && token.type === 'labelLink') {
+        token._inactive = true
+      }
+    } else if (close) {
+      if (
+        events[index][0] === 'enter' &&
+        (token.type === 'labelImage' || token.type === 'labelLink') &&
+        !token._balanced
+      ) {
+        open = index
+
+        if (token.type !== 'labelLink') {
+          offset = 2
+          break
+        }
+      }
+    } else if (token.type === 'labelEnd') {
+      close = index
+    }
+  }
+
+  group = {
+    type: events[open][1].type === 'labelLink' ? 'link' : 'image',
+    start: shallow(events[open][1].start),
+    end: shallow(events[events.length - 1][1].end)
+  }
+  label = {
+    type: 'label',
+    start: shallow(events[open][1].start),
+    end: shallow(events[close][1].end)
+  }
+  text = {
+    type: 'labelText',
+    start: shallow(events[open + offset + 2][1].end),
+    end: shallow(events[close - 2][1].start)
+  }
+  media = [
+    ['enter', group, context],
+    ['enter', label, context]
+  ] // Opening marker.
+
+  media = chunkedPush(media, events.slice(open + 1, open + offset + 3)) // Text open.
+
+  media = chunkedPush(media, [['enter', text, context]]) // Between.
+
+  media = chunkedPush(
+    media,
+    resolveAll(
+      context.parser.constructs.insideSpan.null,
+      events.slice(open + offset + 4, close - 3),
+      context
+    )
+  ) // Text close, marker close, label close.
+
+  media = chunkedPush(media, [
+    ['exit', text, context],
+    events[close - 2],
+    events[close - 1],
+    ['exit', label, context]
+  ]) // Reference, resource, or so.
+
+  media = chunkedPush(media, events.slice(close + 1)) // Media close.
+
+  media = chunkedPush(media, [['exit', group, context]])
+  chunkedSplice(events, open, events.length, media)
+  return events
+}
+
+function tokenizeLabelEnd(effects, ok, nok) {
+  var self = this
+  var index = self.events.length
+  var labelStart
+  var defined // Find an opening.
+
+  while (index--) {
+    if (
+      (self.events[index][1].type === 'labelImage' ||
+        self.events[index][1].type === 'labelLink') &&
+      !self.events[index][1]._balanced
+    ) {
+      labelStart = self.events[index][1]
+      break
+    }
+  }
+
+  return start
+
+  function start(code) {
+    if (!labelStart) {
+      return nok(code)
+    } // It’s a balanced bracket, but contains a link.
+
+    if (labelStart._inactive) return balanced(code)
+    defined =
+      self.parser.defined.indexOf(
+        normalizeIdentifier(
+          self.sliceSerialize({
+            start: labelStart.end,
+            end: self.now()
+          })
+        )
+      ) > -1
+    effects.enter('labelEnd')
+    effects.enter('labelMarker')
+    effects.consume(code)
+    effects.exit('labelMarker')
+    effects.exit('labelEnd')
+    return afterLabelEnd
+  }
+
+  function afterLabelEnd(code) {
+    // Resource: `[asd](fgh)`.
+    if (code === 40) {
+      return effects.attempt(
+        resourceConstruct,
+        ok,
+        defined ? ok : balanced
+      )(code)
+    } // Collapsed (`[asd][]`) or full (`[asd][fgh]`) reference?
+
+    if (code === 91) {
+      return effects.attempt(
+        fullReferenceConstruct,
+        ok,
+        defined
+          ? effects.attempt(collapsedReferenceConstruct, ok, balanced)
+          : balanced
+      )(code)
+    } // Shortcut reference: `[asd]`?
+
+    return defined ? ok(code) : balanced(code)
+  }
+
+  function balanced(code) {
+    labelStart._balanced = true
+    return nok(code)
+  }
+}
+
+function tokenizeResource(effects, ok, nok) {
+  return start
+
+  function start(code) {
+    effects.enter('resource')
+    effects.enter('resourceMarker')
+    effects.consume(code)
+    effects.exit('resourceMarker')
+    return factoryWhitespace(effects, open)
+  }
+
+  function open(code) {
+    if (code === 41) {
+      return end(code)
+    }
+
+    return factoryDestination(
+      effects,
+      destinationAfter,
+      nok,
+      'resourceDestination',
+      'resourceDestinationLiteral',
+      'resourceDestinationLiteralMarker',
+      'resourceDestinationRaw',
+      'resourceDestinationString',
+      3
+    )(code)
+  }
+
+  function destinationAfter(code) {
+    return markdownLineEndingOrSpace(code)
+      ? factoryWhitespace(effects, between)(code)
+      : end(code)
+  }
+
+  function between(code) {
+    if (code === 34 || code === 39 || code === 40) {
+      return factoryTitle(
+        effects,
+        factoryWhitespace(effects, end),
+        nok,
+        'resourceTitle',
+        'resourceTitleMarker',
+        'resourceTitleString'
+      )(code)
+    }
+
+    return end(code)
+  }
+
+  function end(code) {
+    if (code === 41) {
+      effects.enter('resourceMarker')
+      effects.consume(code)
+      effects.exit('resourceMarker')
+      effects.exit('resource')
+      return ok
+    }
+
+    return nok(code)
+  }
+}
+
+function tokenizeFullReference(effects, ok, nok) {
+  var self = this
+  return start
+
+  function start(code) {
+    return factoryLabel.call(
+      self,
+      effects,
+      afterLabel,
+      nok,
+      'reference',
+      'referenceMarker',
+      'referenceString'
+    )(code)
+  }
+
+  function afterLabel(code) {
+    return self.parser.defined.indexOf(
+      normalizeIdentifier(
+        self.sliceSerialize(self.events[self.events.length - 1][1]).slice(1, -1)
+      )
+    ) < 0
+      ? nok(code)
+      : ok(code)
+  }
+}
+
+function tokenizeCollapsedReference(effects, ok, nok) {
+  return start
+
+  function start(code) {
+    effects.enter('reference')
+    effects.enter('referenceMarker')
+    effects.consume(code)
+    effects.exit('referenceMarker')
+    return open
+  }
+
+  function open(code) {
+    if (code === 93) {
+      effects.enter('referenceMarker')
+      effects.consume(code)
+      effects.exit('referenceMarker')
+      effects.exit('reference')
+      return ok
+    }
+
+    return nok(code)
+  }
+}
+
+module.exports = labelEnd