Add support for newlines in options

Closes GH-37.
Related to GH-35.

Author: jeffal

index.js

@@ -2,13 +2,14 @@
 
 module.exports = toMDAST
 
-var minify = require('rehype-minify-whitespace')()
+var minify = require('rehype-minify-whitespace')
 var xtend = require('xtend')
 var one = require('./lib/one')
 var handlers = require('./lib/handlers')
 
 function toMDAST(tree, options) {
   var settings = options || {}
+  var opts = {newlines: settings.newlines === true}
 
   h.baseFound = false
   h.frozenBaseURL = null
@@ -17,7 +18,7 @@ function toMDAST(tree, options) {
   h.augment = augment
   h.document = settings.document
 
-  return one(h, minify(tree), null)
+  return one(h, minify(opts)(tree), null)
 
   function h(node, type, props, children) {
     var result

readme.md

@@ -69,6 +69,11 @@ Whether the given tree is a complete document.  If `document: true`,
 implicit paragraphs are added in the `root` node around inline MDAST nodes.
 Otherwise, inline MDAST nodes are wrapped when needed.
 
+###### `options.newlines`
+
+Whether to collapse to a newline (`\n`) instead of a single space (default) if
+a streak of white-space in a text node contains a newline.
+
 ##### Returns
 
 [`MDASTNode`][mdast].

test/fixtures/newlines-off/index.html

@@ -0,0 +1,2 @@
+Hello
+World.

test/fixtures/newlines-off/index.json

@@ -0,0 +1,4 @@
+{
+  "fragment": true,
+  "newlines": false
+}

test/fixtures/newlines-off/index.md

@@ -0,0 +1 @@
+Hello World.

test/fixtures/newlines-on/index.html

@@ -0,0 +1,2 @@
+Hello
+World.

test/fixtures/newlines-on/index.json

@@ -0,0 +1,4 @@
+{
+  "fragment": true,
+  "newlines": true
+}

test/fixtures/newlines-on/index.md

@@ -0,0 +1,2 @@
+Hello
+World.

test/index.js

@@ -207,7 +207,7 @@ test('handlers option', function(t) {
   t.end()
 })
 
-test('document', function(t) {
+test('document option', function(t) {
   var tree = u('root', [
     h('b', 'Importance'),
     u('text', ' and '),
@@ -241,3 +241,78 @@ test('document', function(t) {
 
   t.end()
 })
+
+test('newlines option', function(t) {
+  t.deepEqual(
+    toMDAST({
+      type: 'root',
+      children: [
+        {
+          type: 'element',
+          tagName: 'p',
+          properties: {},
+          children: [
+            {
+              type: 'text',
+              value: 'Alpha\nBeta'
+            }
+          ]
+        }
+      ]
+    }),
+    {
+      type: 'root',
+      children: [
+        {
+          type: 'paragraph',
+          children: [
+            {
+              type: 'text',
+              value: 'Alpha Beta'
+            }
+          ]
+        }
+      ]
+    },
+    'should collapse newline to a single space'
+  )
+
+  t.deepEqual(
+    toMDAST(
+      {
+        type: 'root',
+        children: [
+          {
+            type: 'element',
+            tagName: 'p',
+            properties: {},
+            children: [
+              {
+                type: 'text',
+                value: 'Alpha\nBeta'
+              }
+            ]
+          }
+        ]
+      },
+      {newlines: true}
+    ),
+    {
+      type: 'root',
+      children: [
+        {
+          type: 'paragraph',
+          children: [
+            {
+              type: 'text',
+              value: 'Alpha\nBeta'
+            }
+          ]
+        }
+      ]
+    },
+    'should contain newlines'
+  )
+
+  t.end()
+})