planning

node_modules/micromark/dist/tokenize/autolink.js

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+'use strict'
+
+var asciiAlpha = require('../character/ascii-alpha.js')
+var asciiAlphanumeric = require('../character/ascii-alphanumeric.js')
+var asciiAtext = require('../character/ascii-atext.js')
+var asciiControl = require('../character/ascii-control.js')
+
+var autolink = {
+  name: 'autolink',
+  tokenize: tokenizeAutolink
+}
+
+function tokenizeAutolink(effects, ok, nok) {
+  var size = 1
+  return start
+
+  function start(code) {
+    effects.enter('autolink')
+    effects.enter('autolinkMarker')
+    effects.consume(code)
+    effects.exit('autolinkMarker')
+    effects.enter('autolinkProtocol')
+    return open
+  }
+
+  function open(code) {
+    if (asciiAlpha(code)) {
+      effects.consume(code)
+      return schemeOrEmailAtext
+    }
+
+    return asciiAtext(code) ? emailAtext(code) : nok(code)
+  }
+
+  function schemeOrEmailAtext(code) {
+    return code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)
+      ? schemeInsideOrEmailAtext(code)
+      : emailAtext(code)
+  }
+
+  function schemeInsideOrEmailAtext(code) {
+    if (code === 58) {
+      effects.consume(code)
+      return urlInside
+    }
+
+    if (
+      (code === 43 || code === 45 || code === 46 || asciiAlphanumeric(code)) &&
+      size++ < 32
+    ) {
+      effects.consume(code)
+      return schemeInsideOrEmailAtext
+    }
+
+    return emailAtext(code)
+  }
+
+  function urlInside(code) {
+    if (code === 62) {
+      effects.exit('autolinkProtocol')
+      return end(code)
+    }
+
+    if (code === 32 || code === 60 || asciiControl(code)) {
+      return nok(code)
+    }
+
+    effects.consume(code)
+    return urlInside
+  }
+
+  function emailAtext(code) {
+    if (code === 64) {
+      effects.consume(code)
+      size = 0
+      return emailAtSignOrDot
+    }
+
+    if (asciiAtext(code)) {
+      effects.consume(code)
+      return emailAtext
+    }
+
+    return nok(code)
+  }
+
+  function emailAtSignOrDot(code) {
+    return asciiAlphanumeric(code) ? emailLabel(code) : nok(code)
+  }
+
+  function emailLabel(code) {
+    if (code === 46) {
+      effects.consume(code)
+      size = 0
+      return emailAtSignOrDot
+    }
+
+    if (code === 62) {
+      // Exit, then change the type.
+      effects.exit('autolinkProtocol').type = 'autolinkEmail'
+      return end(code)
+    }
+
+    return emailValue(code)
+  }
+
+  function emailValue(code) {
+    if ((code === 45 || asciiAlphanumeric(code)) && size++ < 63) {
+      effects.consume(code)
+      return code === 45 ? emailValue : emailLabel
+    }
+
+    return nok(code)
+  }
+
+  function end(code) {
+    effects.enter('autolinkMarker')
+    effects.consume(code)
+    effects.exit('autolinkMarker')
+    effects.exit('autolink')
+    return ok
+  }
+}
+
+module.exports = autolink