Use highlight.js instead of prettify

Fixes #1484

Author: kevmoo

README.md

@@ -167,6 +167,12 @@ Some examples of likely triage priorities:
 
 Please see the [dartdoc license][].
 
+Generated docs include:
+
+ * Highlight.js -
+   [LICENSE](https://github.com/isagalaev/highlight.js/blob/master/LICENSE)
+   * With `github.css` (c) Vasily Polovnyov <[email protected]>
+
 [GitHub Issue Tracker]: https://github.com/dart-lang/dartdoc/issues
 [contributor docs]: https://github.com/dart-lang/dartdoc/blob/master/CONTRIBUTING.md
 [dartdoc license]: https://github.com/dart-lang/dartdoc/blob/master/LICENSE

lib/resources/github.css

@@ -0,0 +1,99 @@
+/*
+
+github.com style (c) Vasily Polovnyov <[email protected]>
+
+*/
+
+.hljs {
+  display: block;
+  overflow-x: auto;
+  padding: 0.5em;
+  color: #333;
+  background: #f8f8f8;
+}
+
+.hljs-comment,
+.hljs-quote {
+  color: #998;
+  font-style: italic;
+}
+
+.hljs-keyword,
+.hljs-selector-tag,
+.hljs-subst {
+  color: #333;
+  font-weight: bold;
+}
+
+.hljs-number,
+.hljs-literal,
+.hljs-variable,
+.hljs-template-variable,
+.hljs-tag .hljs-attr {
+  color: #008080;
+}
+
+.hljs-string,
+.hljs-doctag {
+  color: #d14;
+}
+
+.hljs-title,
+.hljs-section,
+.hljs-selector-id {
+  color: #900;
+  font-weight: bold;
+}
+
+.hljs-subst {
+  font-weight: normal;
+}
+
+.hljs-type,
+.hljs-class .hljs-title {
+  color: #458;
+  font-weight: bold;
+}
+
+.hljs-tag,
+.hljs-name,
+.hljs-attribute {
+  color: #000080;
+  font-weight: normal;
+}
+
+.hljs-regexp,
+.hljs-link {
+  color: #009926;
+}
+
+.hljs-symbol,
+.hljs-bullet {
+  color: #990073;
+}
+
+.hljs-built_in,
+.hljs-builtin-name {
+  color: #0086b3;
+}
+
+.hljs-meta {
+  color: #999;
+  font-weight: bold;
+}
+
+.hljs-deletion {
+  background: #fdd;
+}
+
+.hljs-addition {
+  background: #dfd;
+}
+
+.hljs-emphasis {
+  font-style: italic;
+}
+
+.hljs-strong {
+  font-weight: bold;
+}

lib/resources/highlight.pack.js

@@ -0,0 +1,19 @@
+# highlight.js
+
+Generated from https://highlightjs.org/download/ on 2017-08-30
+
+Included languages:
+
+* bash
+* css
+* dart
+* java
+* javascript
+* json
+* markdown
+* objectivec
+* ruby - dragged in by `yaml` - 🙄
+* shell
+* swift
+* xml - includes html
+* yaml

lib/resources/prettify.css

@@ -193,7 +193,7 @@ function initSearch() {
 }
 
 document.addEventListener("DOMContentLoaded", function() {
-  prettyPrint();
+  hljs.initHighlightingOnLoad();
   initSideNav();
   initSearch();
 });

lib/resources/prettify.js

@@ -8,8 +8,8 @@ const List<String> resource_names = const [
   'package:dartdoc/resources/css/bootstrap.css.map',
   'package:dartdoc/resources/css/bootstrap.min.css',
   'package:dartdoc/resources/favicon.png',
-  'package:dartdoc/resources/prettify.css',
-  'package:dartdoc/resources/prettify.js',
+  'package:dartdoc/resources/github.css',
+  'package:dartdoc/resources/highlight.pack.js',
   'package:dartdoc/resources/script.js',
   'package:dartdoc/resources/styles.css',
   'package:dartdoc/resources/typeahead.bundle.min.js'

lib/resources/readme.md

@@ -797,7 +797,6 @@ class MarkdownDocument extends md.Document {
       }
 
       bool specifiesLanguage = pre.classes.isNotEmpty;
-      pre.classes.add('prettyprint');
       // Assume the user intended Dart if there are no other classes present.
       if (!specifiesLanguage) pre.classes.add('language-dart');
     }

lib/resources/script.js

@@ -14,7 +14,7 @@
 
 <script src="https://code.jquery.com/jquery-2.1.4.min.js"></script>
 <script src="static-assets/typeahead.bundle.min.js"></script>
-<script src="static-assets/prettify.js"></script>
+<script src="static-assets/highlight.pack.js"></script>
 <script src="static-assets/URI.js"></script>
 <script src="static-assets/script.js"></script>
 <!-- footer placeholder -->