Add support for custom quotes

Author: wooorm

index.js

@@ -16,13 +16,15 @@ function toMdast(tree, options) {
   h.baseFound = false
   h.frozenBaseUrl = null
   h.wrapText = true
+  h.qNesting = 0
 
   h.handlers = xtend(handlers, settings.handlers || {})
   h.augment = augment
   h.document = settings.document
 
   h.checked = settings.checked || '[x]'
   h.unchecked = settings.unchecked || '[ ]'
+  h.quotes = settings.quotes || ['"']
 
   visit(tree, onvisit)
 

lib/handlers/q.js

@@ -4,23 +4,31 @@ module.exports = q
 
 var all = require('../all')
 
-var quote = '"'
-
 function q(h, node) {
-  var contents = all(h, node)
-  var head = contents[0]
-  var tail = contents[contents.length - 1]
+  var expected = h.quotes[h.qNesting % h.quotes.length]
+  var open = expected.length === 1 ? expected : expected.charAt(0)
+  var close = expected.length === 1 ? expected : expected.charAt(1)
+  var contents
+  var head
+  var tail
+
+  h.qNesting++
+  contents = all(h, node)
+  h.qNesting--
+
+  head = contents[0]
+  tail = contents[contents.length - 1]
 
   if (head && head.type === 'text') {
-    head.value = quote + head.value
+    head.value = open + head.value
   } else {
-    contents.unshift({type: 'text', value: quote})
+    contents.unshift({type: 'text', value: open})
   }
 
   if (tail && tail.type === 'text') {
-    tail.value += quote
+    tail.value += close
   } else {
-    contents.push({type: 'text', value: quote})
+    contents.push({type: 'text', value: close})
   }
 
   return contents

readme.md

@@ -97,6 +97,21 @@ default: `[x]`).
 Value to use when serializing an unchecked checkbox or radio input (`string`,
 default: `[ ]`).
 
+###### `options.quotes`
+
+List of quotes to use (`string[]`, default: `['"']`).
+Each value can be one or two characters.
+When two, the first character determines the opening quote and the second the
+closing quote at that level.
+When one, both the opening and closing quote are that character.
+The order in which the preferred quotes appear determines which quotes to use at
+which level of nesting.
+So, to prefer `‘’` at the first level of nesting, and `“”` at the second, pass:
+`['‘’', '“”']`.
+If `<q>`s are nested deeper than the given amount of quotes, the markers wrap
+around: a third level of nesting when using `['«»', '‹›']` should have double
+guillemets, a fourth single, a fifth double again, etc.
+
 ##### Returns
 
 [`MdastNode`][mdast-node].

test/fixtures/quotes-alt/index.html

@@ -0,0 +1 @@
+<q>alpha <q>bravo <q>charlie <q>delta <q>echo</q>.</q></q></q></q>

test/fixtures/quotes-alt/index.json

@@ -0,0 +1,4 @@
+{
+  "fragment": true,
+  "quotes": ["«»", "‹›", "“”"]
+}

test/fixtures/quotes-alt/index.md

@@ -0,0 +1 @@
+«alpha ‹bravo “charlie «delta ‹echo›.»”›»

test/fixtures/quotes/index.html

@@ -0,0 +1 @@
+<q>alpha <q>bravo <q>charlie <q>delta <q>echo</q>.</q></q></q></q>

test/fixtures/quotes/index.json

@@ -0,0 +1,4 @@
+{
+  "fragment": true,
+  "quotes": ["“”", "‘’"]
+}

test/fixtures/quotes/index.md

@@ -0,0 +1 @@
+“alpha ‘bravo “charlie ‘delta “echo”.’”’”