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127 lines
3.8 KiB
Markdown
127 lines
3.8 KiB
Markdown
---
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title: "Markup: Syntax Highlighting"
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excerpt: "Post displaying the various ways of highlighting code in Markdown."
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last_modified_at: 2018-01-03T09:45:06-05:00
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header:
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teaser: "assets/images/markup-syntax-highlighting-teaser.jpg"
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tags:
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- code
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- syntax highlighting
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toc: true
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---
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Syntax highlighting is a feature that displays source code, in different colors and fonts according to the category of terms. This feature facilitates writing in a structured language such as a programming language or a markup language as both structures and syntax errors are visually distinct. Highlighting does not affect the meaning of the text itself; it is intended only for human readers.[^1]
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[^1]: <http://en.wikipedia.org/wiki/Syntax_highlighting>
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### GFM Code Blocks
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GitHub Flavored Markdown [fenced code blocks](https://help.github.com/articles/creating-and-highlighting-code-blocks/) are supported. To modify styling and highlight colors edit `/_sass/syntax.scss`.
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```css
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#container {
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float: left;
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margin: 0 -240px 0 0;
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width: 100%;
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}
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```
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{% highlight scss %}
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.highlight {
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margin: 0;
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padding: 1em;
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font-family: $monospace;
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font-size: $type-size-7;
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line-height: 1.8;
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}
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{% endhighlight %}
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```html
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{% raw %}<nav class="pagination" role="navigation">
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{% if page.previous %}
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<a href="{{ site.url }}{{ page.previous.url }}" class="btn" title="{{ page.previous.title }}">Previous article</a>
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{% endif %}
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{% if page.next %}
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<a href="{{ site.url }}{{ page.next.url }}" class="btn" title="{{ page.next.title }}">Next article</a>
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{% endif %}
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</nav><!-- /.pagination -->{% endraw %}
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```
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```ruby
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module Jekyll
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class TagIndex < Page
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def initialize(site, base, dir, tag)
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@site = site
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@base = base
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@dir = dir
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@name = 'index.html'
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self.process(@name)
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self.read_yaml(File.join(base, '_layouts'), 'tag_index.html')
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self.data['tag'] = tag
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tag_title_prefix = site.config['tag_title_prefix'] || 'Tagged: '
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tag_title_suffix = site.config['tag_title_suffix'] || '–'
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self.data['title'] = "#{tag_title_prefix}#{tag}"
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self.data['description'] = "An archive of posts tagged #{tag}."
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end
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end
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end
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```
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### Code Blocks in Lists
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Indentation matters. Be sure the indent of the code block aligns with the first non-space character after the list item marker (e.g., `1.`). Usually this will mean indenting 3 spaces instead of 4.
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1. Do step 1.
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2. Now do this:
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```ruby
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def print_hi(name)
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puts "Hi, #{name}"
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end
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print_hi('Tom')
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#=> prints 'Hi, Tom' to STDOUT.
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```
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3. Now you can do this.
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### Jekyll Highlight Tag
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An example of a code blocking using Jekyll's [`{% raw %}{% highlight %}{% endraw %}` tag](https://jekyllrb.com/docs/templates/#code-snippet-highlighting).
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{% highlight javascript linenos %}
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// 'gulp html' -- does nothing
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// 'gulp html --prod' -- minifies and gzips HTML files for production
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gulp.task('html', () => {
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return gulp.src(paths.siteFolderName + paths.htmlPattern)
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.pipe(when(argv.prod, htmlmin({
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removeComments: true,
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collapseWhitespace: true,
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collapseBooleanAttributes: false,
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removeAttributeQuotes: false,
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removeRedundantAttributes: false,
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minifyJS: true,
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minifyCSS: true
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})))
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.pipe(when(argv.prod, size({title: 'optimized HTML'})))
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.pipe(when(argv.prod, gulp.dest(paths.siteFolderName)))
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.pipe(when(argv.prod, gzip({append: true})))
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.pipe(when(argv.prod, size({
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title: 'gzipped HTML',
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gzip: true
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})))
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.pipe(when(argv.prod, gulp.dest(paths.siteFolderName)))
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});
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{% endhighlight %}
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{% highlight wl linenos %}
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Module[{},
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Sqrt[2]
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4
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]
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{% endhighlight %}
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### GitHub Gist Embed
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An example of a Gist embed below.
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<script src="https://gist.github.com/mmistakes/77c68fbb07731a456805a7b473f47841.js"></script> |