planning

node_modules/micromark/dist/tokenize/code-fenced.js

@@ -0,0 +1,176 @@
+'use strict'
+
+var markdownLineEnding = require('../character/markdown-line-ending.js')
+var markdownLineEndingOrSpace = require('../character/markdown-line-ending-or-space.js')
+var prefixSize = require('../util/prefix-size.js')
+var factorySpace = require('./factory-space.js')
+
+var codeFenced = {
+  name: 'codeFenced',
+  tokenize: tokenizeCodeFenced,
+  concrete: true
+}
+
+function tokenizeCodeFenced(effects, ok, nok) {
+  var self = this
+  var closingFenceConstruct = {
+    tokenize: tokenizeClosingFence,
+    partial: true
+  }
+  var initialPrefix = prefixSize(this.events, 'linePrefix')
+  var sizeOpen = 0
+  var marker
+  return start
+
+  function start(code) {
+    effects.enter('codeFenced')
+    effects.enter('codeFencedFence')
+    effects.enter('codeFencedFenceSequence')
+    marker = code
+    return sequenceOpen(code)
+  }
+
+  function sequenceOpen(code) {
+    if (code === marker) {
+      effects.consume(code)
+      sizeOpen++
+      return sequenceOpen
+    }
+
+    effects.exit('codeFencedFenceSequence')
+    return sizeOpen < 3
+      ? nok(code)
+      : factorySpace(effects, infoOpen, 'whitespace')(code)
+  }
+
+  function infoOpen(code) {
+    if (code === null || markdownLineEnding(code)) {
+      return openAfter(code)
+    }
+
+    effects.enter('codeFencedFenceInfo')
+    effects.enter('chunkString', {
+      contentType: 'string'
+    })
+    return info(code)
+  }
+
+  function info(code) {
+    if (code === null || markdownLineEndingOrSpace(code)) {
+      effects.exit('chunkString')
+      effects.exit('codeFencedFenceInfo')
+      return factorySpace(effects, infoAfter, 'whitespace')(code)
+    }
+
+    if (code === 96 && code === marker) return nok(code)
+    effects.consume(code)
+    return info
+  }
+
+  function infoAfter(code) {
+    if (code === null || markdownLineEnding(code)) {
+      return openAfter(code)
+    }
+
+    effects.enter('codeFencedFenceMeta')
+    effects.enter('chunkString', {
+      contentType: 'string'
+    })
+    return meta(code)
+  }
+
+  function meta(code) {
+    if (code === null || markdownLineEnding(code)) {
+      effects.exit('chunkString')
+      effects.exit('codeFencedFenceMeta')
+      return openAfter(code)
+    }
+
+    if (code === 96 && code === marker) return nok(code)
+    effects.consume(code)
+    return meta
+  }
+
+  function openAfter(code) {
+    effects.exit('codeFencedFence')
+    return self.interrupt ? ok(code) : content(code)
+  }
+
+  function content(code) {
+    if (code === null) {
+      return after(code)
+    }
+
+    if (markdownLineEnding(code)) {
+      effects.enter('lineEnding')
+      effects.consume(code)
+      effects.exit('lineEnding')
+      return effects.attempt(
+        closingFenceConstruct,
+        after,
+        initialPrefix
+          ? factorySpace(effects, content, 'linePrefix', initialPrefix + 1)
+          : content
+      )
+    }
+
+    effects.enter('codeFlowValue')
+    return contentContinue(code)
+  }
+
+  function contentContinue(code) {
+    if (code === null || markdownLineEnding(code)) {
+      effects.exit('codeFlowValue')
+      return content(code)
+    }
+
+    effects.consume(code)
+    return contentContinue
+  }
+
+  function after(code) {
+    effects.exit('codeFenced')
+    return ok(code)
+  }
+
+  function tokenizeClosingFence(effects, ok, nok) {
+    var size = 0
+    return factorySpace(
+      effects,
+      closingSequenceStart,
+      'linePrefix',
+      this.parser.constructs.disable.null.indexOf('codeIndented') > -1
+        ? undefined
+        : 4
+    )
+
+    function closingSequenceStart(code) {
+      effects.enter('codeFencedFence')
+      effects.enter('codeFencedFenceSequence')
+      return closingSequence(code)
+    }
+
+    function closingSequence(code) {
+      if (code === marker) {
+        effects.consume(code)
+        size++
+        return closingSequence
+      }
+
+      if (size < sizeOpen) return nok(code)
+      effects.exit('codeFencedFenceSequence')
+      return factorySpace(effects, closingSequenceEnd, 'whitespace')(code)
+    }
+
+    function closingSequenceEnd(code) {
+      if (code === null || markdownLineEnding(code)) {
+        effects.exit('codeFencedFence')
+        return ok(code)
+      }
+
+      return nok(code)
+    }
+  }
+}
+
+module.exports = codeFenced