planning

node_modules/remark-stringify/lib/visitors/link.js

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+'use strict'
+
+var uri = require('../util/enclose-uri')
+var title = require('../util/enclose-title')
+
+module.exports = link
+
+var space = ' '
+var leftSquareBracket = '['
+var rightSquareBracket = ']'
+var leftParenthesis = '('
+var rightParenthesis = ')'
+
+// Expression for a protocol:
+// See <http://en.wikipedia.org/wiki/URI_scheme#Generic_syntax>.
+var protocol = /^[a-z][a-z+.-]+:\/?/i
+
+// Stringify a link.
+//
+// When no title exists, the compiled `children` equal `url`, and `url` starts
+// with a protocol, an auto link is created:
+//
+// ```markdown
+// <http://example.com>
+// ```
+//
+// Otherwise, is smart about enclosing `url` (see `encloseURI()`) and `title`
+// (see `encloseTitle()`).
+// ```
+//
+// ```markdown
+// [foo](<foo at bar dot com> 'An "example" e-mail')
+// ```
+//
+// Supports named entities in the `url` and `title` when in `settings.encode`
+// mode.
+function link(node) {
+  var self = this
+  var content = self.encode(node.url || '', node)
+  var exit = self.enterLink()
+  var escaped = self.encode(self.escape(node.url || '', node))
+  var value = self.all(node).join('')
+
+  exit()
+
+  if (node.title == null && protocol.test(content) && escaped === value) {
+    // Backslash escapes do not work in autolinks, so we do not escape.
+    return uri(self.encode(node.url), true)
+  }
+
+  content = uri(content)
+
+  if (node.title) {
+    content += space + title(self.encode(self.escape(node.title, node), node))
+  }
+
+  return (
+    leftSquareBracket +
+    value +
+    rightSquareBracket +
+    leftParenthesis +
+    content +
+    rightParenthesis
+  )
+}