Add Node.js support for the normalize-whitespace plugin

plugins/normalize-whitespace/index.html

@@ -129,6 +129,41 @@ <h1>Examples</h1>
 
 </pre>
 
+	<p>This plugin can also be used on the server or on the command line with Node.js:</p>
+
+	<pre><code class="language-javascript">
+var Prism = require('prismjs');
+var Normalizer = require('prismjs/plugins/normalize-whitespace/prism-normalize-whitespace');
+// Create a new Normalizer object
+var nw = new Normalizer({
+	'remove-trailing': true,
+	'remove-indent': true,
+	'left-trim': true,
+	'right-trim': true,
+	/*'break-lines': 80,
+	'indent': 2,
+	'remove-initial-line-feed': false,
+	'tabs-to-spaces': 4,
+	'spaces-to-tabs': 4*/
+});
+
+// ..or use the default object from Prism
+nw = Prism.plugins.NormalizeWhitespace;
+
+// The code snippet you want to highlight, as a string
+var code = "\t\t\tvar data = 1;    ";
+
+// Removes leading and trailing whitespace
+// and then indents by 1 tab
+code = nw.normalize(code, {
+	// Extra settings
+	indent: 1
+});
+
+// Returns a highlighted HTML string
+var html = Prism.highlight(code, Prism.languages.javascript);
+	</code></pre>
+
 
 </section>
 

plugins/normalize-whitespace/prism-normalize-whitespace.js

@@ -1,9 +1,5 @@
 (function() {
 
-if (typeof self === 'undefined' || !self.Prism || !self.document) {
-	return;
-}
-
 var assign = Object.assign || function (obj1, obj2) {
 	for (var name in obj2) {
 		if (obj2.hasOwnProperty(name))
@@ -114,6 +110,16 @@ NormalizeWhitespace.prototype = {
 	}
 };
 
+// Support node modules
+if (typeof module !== 'undefined' && module.exports) {
+	module.exports = NormalizeWhitespace;
+}
+
+// Exit if prism is not loaded
+if (typeof Prism === 'undefined') {
+	return;
+}
+
 Prism.plugins.NormalizeWhitespace = new NormalizeWhitespace({
 	'remove-trailing': true,
 	'remove-indent': true,
@@ -127,18 +133,30 @@ Prism.plugins.NormalizeWhitespace = new NormalizeWhitespace({
 });
 
 Prism.hooks.add('before-sanity-check', function (env) {
+	var Normalizer = Prism.plugins.NormalizeWhitespace;
+
+	// Check settings
+	if (env.settings && env.settings['whitespace-normalization'] === false) {
+		return;
+	}
+
+	// Simple mode if there is no env.element
+	if ((!env.element || !env.element.parentNode) && env.code) {
+		env.code = Normalizer.normalize(env.code, env.settings);
+		return;
+	}
+
+	// Normal mode
 	var pre = env.element.parentNode;
 	var clsReg = /\bno-whitespace-normalization\b/;
 	if (!env.code || !pre || pre.nodeName.toLowerCase() !== 'pre' ||
-			(env.settings && env.settings['whitespace-normalization'] === false) ||
 			clsReg.test(pre.className) || clsReg.test(env.element.className))
 		return;
 
 	var children = pre.childNodes,
 	    before = '',
 	    after = '',
-	    codeFound = false,
-	    Normalizer = Prism.plugins.NormalizeWhitespace;
+	    codeFound = false;
 
 	// Move surrounding whitespace from the <pre> tag into the <code> tag
 	for (var i = 0; i < children.length; ++i) {