Fix missing content on paragraphs after checkbox

Closes syntax-tree/mdast-util-from-markdown#6.

Author: wooorm

from-markdown.js

@@ -11,24 +11,38 @@ function exitCheck(token) {
 }
 
 function exitParagraphWithTaskListItem(token) {
-  var node = this.stack[this.stack.length - 1]
   var parent = this.stack[this.stack.length - 2]
+  var node = this.stack[this.stack.length - 1]
+  var siblings = parent.children
   var head = node.children[0]
+  var index = -1
+  var firstParaghraph
 
   if (
+    parent &&
     parent.type === 'listItem' &&
     typeof parent.checked === 'boolean' &&
     head &&
     head.type === 'text'
   ) {
-    // Must start with a space or a tab.
-    head.value = head.value.slice(1)
-    if (head.value.length === 0) {
-      node.children.shift()
-    } else {
-      head.position.start.column++
-      head.position.start.offset++
-      node.position.start = Object.assign({}, head.position.start)
+    while (++index < siblings.length) {
+      if (siblings[index].type === 'paragraph') {
+        firstParaghraph = siblings[index]
+        break
+      }
+    }
+
+    if (firstParaghraph === node) {
+      // Must start with a space or a tab.
+      head.value = head.value.slice(1)
+
+      if (head.value.length === 0) {
+        node.children.shift()
+      } else {
+        head.position.start.column++
+        head.position.start.offset++
+        node.position.start = Object.assign({}, head.position.start)
+      }
     }
   }
 

test.js

@@ -162,6 +162,32 @@ test('markdown -> mdast', function (t) {
     'should support a text construct after the checkbox'
   )
 
+  t.deepEqual(
+    removePosition(
+      fromMarkdown('* [x] a\n\n  b', {
+        extensions: [syntax],
+        mdastExtensions: [taskListItem.fromMarkdown]
+      }),
+      true
+    ).children[0].children[0],
+    {
+      type: 'listItem',
+      spread: true,
+      checked: true,
+      children: [
+        {
+          type: 'paragraph',
+          children: [{type: 'text', value: 'a'}]
+        },
+        {
+          type: 'paragraph',
+          children: [{type: 'text', value: 'b'}]
+        }
+      ]
+    },
+    'should support further paragraphs after checkboxes'
+  )
+
   t.end()
 })