planning

node_modules/mdast-util-to-hast/lib/handlers/list-item.js

@@ -0,0 +1,89 @@
+'use strict'
+
+module.exports = listItem
+
+var u = require('unist-builder')
+var wrap = require('../wrap')
+var all = require('../all')
+
+function listItem(h, node, parent) {
+  var children = node.children
+  var head = children[0]
+  var raw = all(h, node)
+  var loose = parent ? listLoose(parent) : listItemLoose(node)
+  var props = {}
+  var result
+  var container
+  var index
+  var length
+  var child
+
+  /* Tight lists should not render 'paragraph' nodes as 'p' tags */
+  if (loose) {
+    result = raw
+  } else {
+    result = []
+    length = raw.length
+    index = -1
+
+    while (++index < length) {
+      child = raw[index]
+
+      if (child.tagName === 'p') {
+        result = result.concat(child.children)
+      } else {
+        result.push(child)
+      }
+    }
+  }
+
+  if (typeof node.checked === 'boolean') {
+    if (loose && (!head || head.type !== 'paragraph')) {
+      result.unshift(h(null, 'p', []))
+    }
+
+    container = loose ? result[0].children : result
+
+    if (container.length !== 0) {
+      container.unshift(u('text', ' '))
+    }
+
+    container.unshift(
+      h(null, 'input', {
+        type: 'checkbox',
+        checked: node.checked,
+        disabled: true
+      })
+    )
+
+    // According to github-markdown-css, this class hides bullet.
+    props.className = ['task-list-item']
+  }
+
+  if (loose && result.length !== 0) {
+    result = wrap(result, true)
+  }
+
+  return h(node, 'li', props, result)
+}
+
+function listLoose(node) {
+  var loose = node.spread
+  var children = node.children
+  var length = children.length
+  var index = -1
+
+  while (!loose && ++index < length) {
+    loose = listItemLoose(children[index])
+  }
+
+  return loose
+}
+
+function listItemLoose(node) {
+  var spread = node.spread
+
+  return spread === undefined || spread === null
+    ? node.children.length > 1
+    : spread
+}