planning

node_modules/micromark/dist/tokenize/setext-underline.js

@@ -0,0 +1,117 @@
+'use strict'
+
+var markdownLineEnding = require('../character/markdown-line-ending.js')
+var shallow = require('../util/shallow.js')
+var factorySpace = require('./factory-space.js')
+
+var setextUnderline = {
+  name: 'setextUnderline',
+  tokenize: tokenizeSetextUnderline,
+  resolveTo: resolveToSetextUnderline
+}
+
+function resolveToSetextUnderline(events, context) {
+  var index = events.length
+  var content
+  var text
+  var definition
+  var heading // Find the opening of the content.
+  // It’ll always exist: we don’t tokenize if it isn’t there.
+
+  while (index--) {
+    if (events[index][0] === 'enter') {
+      if (events[index][1].type === 'content') {
+        content = index
+        break
+      }
+
+      if (events[index][1].type === 'paragraph') {
+        text = index
+      }
+    } // Exit
+    else {
+      if (events[index][1].type === 'content') {
+        // Remove the content end (if needed we’ll add it later)
+        events.splice(index, 1)
+      }
+
+      if (!definition && events[index][1].type === 'definition') {
+        definition = index
+      }
+    }
+  }
+
+  heading = {
+    type: 'setextHeading',
+    start: shallow(events[text][1].start),
+    end: shallow(events[events.length - 1][1].end)
+  } // Change the paragraph to setext heading text.
+
+  events[text][1].type = 'setextHeadingText' // If we have definitions in the content, we’ll keep on having content,
+  // but we need move it.
+
+  if (definition) {
+    events.splice(text, 0, ['enter', heading, context])
+    events.splice(definition + 1, 0, ['exit', events[content][1], context])
+    events[content][1].end = shallow(events[definition][1].end)
+  } else {
+    events[content][1] = heading
+  } // Add the heading exit at the end.
+
+  events.push(['exit', heading, context])
+  return events
+}
+
+function tokenizeSetextUnderline(effects, ok, nok) {
+  var self = this
+  var index = self.events.length
+  var marker
+  var paragraph // Find an opening.
+
+  while (index--) {
+    // Skip enter/exit of line ending, line prefix, and content.
+    // We can now either have a definition or a paragraph.
+    if (
+      self.events[index][1].type !== 'lineEnding' &&
+      self.events[index][1].type !== 'linePrefix' &&
+      self.events[index][1].type !== 'content'
+    ) {
+      paragraph = self.events[index][1].type === 'paragraph'
+      break
+    }
+  }
+
+  return start
+
+  function start(code) {
+    if (!self.lazy && (self.interrupt || paragraph)) {
+      effects.enter('setextHeadingLine')
+      effects.enter('setextHeadingLineSequence')
+      marker = code
+      return closingSequence(code)
+    }
+
+    return nok(code)
+  }
+
+  function closingSequence(code) {
+    if (code === marker) {
+      effects.consume(code)
+      return closingSequence
+    }
+
+    effects.exit('setextHeadingLineSequence')
+    return factorySpace(effects, closingSequenceEnd, 'lineSuffix')(code)
+  }
+
+  function closingSequenceEnd(code) {
+    if (code === null || markdownLineEnding(code)) {
+      effects.exit('setextHeadingLine')
+      return ok(code)
+    }
+
+    return nok(code)
+  }
+}
+
+module.exports = setextUnderline