Grav Prism Highlighter Plugin

Prism Highlighter is a Grav plugin that adds simple and powerful code highlighting functionality utilizing the Prism.js syntax highlighter.

Installation

Installing the Highlight plugin can be done in one of two ways. Our GPM (Grav Package Manager) installation method enables you to quickly and easily install the plugin with a simple terminal command, while the manual method enables you to do so via a zip file.

GPM Installation (Preferred)

The simplest way to install this plugin is via the Grav Package Manager (GPM) through your system's Terminal (also called the command line). From the root of your Grav install type:

bin/gpm install prism-highlight

This will install the Highlight plugin into your /user/plugins directory within Grav. Its files can be found under /your/site/grav/user/plugins/prism-highlight.

Manual Installation

To install this plugin, just download the zip version of this repository and unzip it under /your/site/grav/user/plugins. Then, rename the folder to prism-highlight. You can find these files either on GitHub or via GetGrav.org.

You should now have all the plugin files under

/your/site/grav/user/plugins/prism-highlight

Languages included

Prism.js supports currently 176 languages, at the time of this edit, but the ones included in this specific version are:

• markup
• html
• xml
• bbcode / shortcode
• svg
• mathml
• css
• css-extras
• clike
• javascript, js
• apacheconf
• bash, shell
• coffeescript, coffee
• diff
• docker, dockerfile
• git
• go
• java
• json
• json5
• less
• lua
• markdown, md
• php
• php-extras
• python, py
• regex
• ruby, rb
• sass
• scss
• sql
• twig
• yaml, yml

Plugins Included

This build of Prism also includes the following plugins:

• Line Highlight
• Line Numbers
• Command Line
• Toolbar
• Copy to Clipboard

Basic Usage

In your markdown, you can create a block of code, and assign the language to it. You can choose between the list above.

Example using regular markdown fenced code syntax:

  ```php
  <?php

  namespace Grav\Plugin;

  use \Grav\Common\Plugin;
  use \Grav\Common\Grav;
  use \Grav\Common\Page\Page;

  class PrismHighlightPlugin extends Plugin
  {
      /**
       * @return array
       */
      public static function getSubscribedEvents()
      {
          return [
              'onPageInitialized' => ['onPageInitialized', 0],
              'onShortcodeHandlers' => ['onShortcodeHandlers', 0],
              'onTwigTemplatePaths' => ['onTwigTemplatePaths', 0],
          ];
      }
  }

Advanced Usage

To get access to advanced options that can be set individually, you can use the included [prism][/prism] shortcode:

For line numbers:

[prism classes="language-twig line-numbers"]
{% set payload = {frontmatter: page.header, content: page.content}  %}
{{ payload|json_encode|raw }}
[/prism]

You can also now add the linkable-line-numbers class to make the line numbers directly linkable. You need to provide an id on the Prism element so that there is something to link against.

For example:

[prism classes="language-twig line-numbers linkable-line-numbers" id="twig-example"]
{% set payload = {frontmatter: page.header, content: page.content}  %}
{{ payload|json_encode|raw }}
[/prism]

For a command Prompt:

If you don't provide a custom prompt, it will default to $ for the command prompt. Provide a custom prompt with the cl-prompt attribute.

[prism classes="language-bash command-line" cl-prompt="\[foo@localhost\] $"]
cd ~/webroot
git clone -b master https://github.com/getgrav/grav.git
[/prism]

You can also specify certain lines as output (won't be prefixed by prompt) using the cl-output attribute:

[prism classes="language-bash command-line" cl-prompt="[root@localhost]" cl-output="2-6"]
ls -la
total 2
drwxr-xr-x   2 chris  chris     11 Jan 10 16:48 .
drwxr--r-x  45 chris  chris     92 Feb 14 11:10 ..
-rwxr-xr-x   1 chris  chris    444 Aug 25  2013 backup
-rwxr-xr-x   1 chris  chris    642 Jan 17 14:42 deploy
[/prism]

Alternatively you can use the cl-filter-putput to provide a lines with a specific prefix to filter out. For example:

[prism classes="language-bash command-line" cl-prompt="[root@localhost]" cl-filter-output=">>"]
ls -la
>>total 2
>>drwxr-xr-x   2 chris  chris     11 Jan 10 16:48 .
>>drwxr--r-x  45 chris  chris     92 Feb 14 11:10 ..
>>-rwxr-xr-x   1 chris  chris    444 Aug 25  2013 backup
>>-rwxr-xr-x   1 chris  chris    642 Jan 17 14:42 deploy
[/prism]

For highlighting specific lines 2 and 4:

[prism classes="language-yaml" highlight="2,4"]
enabled: true
theme: prism-base16-ocean.dark.css
all-pre-blocks: true
plugins:
    line-numbers: false
    command-line: false
    command-line-prompt: '$'
[/prism]

Find out more about these options by checking out the Prism.js plugins page.

Git File Support

If you provide a git="<url>" parameter in the shortcode, the plugin will try to retrieve the 'raw' version of this file. For example:

[prism git="https://github.com/getgrav/grav/blob/develop/system/router.php" classes="language-php line-numbers linkable-line-numbers" id="grav-router"]
[/prism]

You can also provide the raw version directly:

[prism git="https://raw.githubusercontent.com/getgrav/grav/develop/system/router.php" classes="language-php line-numbers linkable-line-numbers" id="grav-router"]
[/prism]

You can also slice the file to only show specific lines by passing a query parameter to the URL:

• slice=0:-2 Show the first line up to and including the second to last line
• slice=24:100 Show lines 24 through 100
• slice=0 Show only the first line of the file

[prism git="https://github.com/getgrav/grav/blob/develop/system/router.php?slice=10:18" classes="language-php line-numbers linkable-line-numbers" id="grav-router"]
[/prism]

Configuration

Configuration shall be set in config/plugins/prism-highlight.yaml.

enabled: true
theme: prism-base16-ocean.dark.css
all-pre-blocks: true
custom:
    js_location: 'user://data/prism-highlight/prism.js'
    css_location: 'user://data/prism-highlight/prism.css'
    theme_location: 'user://data/prism-highlight/custom-theme.css'
plugins:
    line-numbers: false
    command-line: false
    command-line-prompt: '$'

You can also override configuration settings at the page level by prefixing options with prism-highlight:. For example you could set a different theme, and turning on line numbers on a particular page with:

title: My Page
prism-highlight:
    theme: base16-duotone-dark.light.css
    plugins:
        line-numbers: true

Themes

The themes available are:

base16-duotone-dark.dark.css
base16-duotone-dark.light.css
base16-duotone-darkdesert.dark.css
base16-duotone-darkearth.dark.css
base16-duotone-darkearth.light.css
base16-duotone-darkforest.dark.css
base16-duotone-darkforest.light.css
base16-duotone-darkpark.dark.css
base16-duotone-darkpool.dark.css
base16-duotone-darkpool.light.css
base16-duotone-darksea.dark.css
base16-duotone-darksea.light.css
base16-duotone-darkspace.dark.css
base16-duotone-darkspace.light.css
prism-a11y-dark.css
prism-atelier-cave-dark.css
prism-atelier-cave-light.css
prism-atelier-dune-dark.css
prism-atelier-dune-light.css
prism-atelier-estuary-dark.css
prism-atelier-estuary-light.css
prism-atelier-forest-dark.css
prism-atelier-forest-light.css
prism-atelier-heath-dark.css
prism-atelier-heath-light.css
prism-atelier-lakeside-dark.css
prism-atelier-lakeside-light.css
prism-atelier-plateau-dark.css
prism-atelier-plateau-light.css
prism-atelier-savanna-dark.css
prism-atelier-savanna-light.css
prism-atelier-seaside-dark.css
prism-atelier-seaside-light.css
prism-atelier-sulphurpool-dark.css
prism-atelier-sulphurpool-light.css
prism-atom-dark.css
prism-base16-3024.dark.css
prism-base16-3024.light.css
prism-base16-apathy.dark.css
prism-base16-apathy.light.css
prism-base16-ashes.dark.css
prism-base16-ashes.light.css
prism-base16-ateliercave.dark.css
prism-base16-ateliercave.light.css
prism-base16-atelierdune.dark.css
prism-base16-atelierdune.light.css
prism-base16-atelierestuary.dark.css
prism-base16-atelierestuary.light.css
prism-base16-atelierforest.dark.css
prism-base16-atelierforest.light.css
prism-base16-atelierheath.dark.css
prism-base16-atelierheath.light.css
prism-base16-atelierlakeside.dark.css
prism-base16-atelierlakeside.light.css
prism-base16-atelierplateau.dark.css
prism-base16-atelierplateau.light.css
prism-base16-ateliersavanna.dark.css
prism-base16-ateliersavanna.light.css
prism-base16-atelierseaside.dark.css
prism-base16-atelierseaside.light.css
prism-base16-ateliersulpherpool.dark.css
prism-base16-ateliersulpherpool.light.css
prism-base16-ateliersulphurpool.dark.css
prism-base16-ateliersulphurpool.light.css
prism-base16-bespin.dark.css
prism-base16-bespin.light.css
prism-base16-brewer.dark.css
prism-base16-brewer.light.css
prism-base16-bright.dark.css
prism-base16-bright.light.css
prism-base16-chalk.dark.css
prism-base16-chalk.light.css
prism-base16-codeschool.dark.css
prism-base16-codeschool.light.css
prism-base16-colors.dark.css
prism-base16-colors.light.css
prism-base16-default.dark.css
prism-base16-default.light.css
prism-base16-eighties.dark.css
prism-base16-eighties.light.css
prism-base16-embers.dark.css
prism-base16-embers.light.css
prism-base16-flat.dark.css
prism-base16-flat.light.css
prism-base16-google.dark.css
prism-base16-google.light.css
prism-base16-grayscale.dark.css
prism-base16-grayscale.light.css
prism-base16-greenscreen.dark.css
prism-base16-greenscreen.light.css
prism-base16-harmonic16.dark.css
prism-base16-harmonic16.light.css
prism-base16-hopscotch.dark.css
prism-base16-hopscotch.light.css
prism-base16-isotope.dark.css
prism-base16-isotope.light.css
prism-base16-londontube.dark.css
prism-base16-londontube.light.css
prism-base16-marrakesh.dark.css
prism-base16-marrakesh.light.css
prism-base16-mocha.dark.css
prism-base16-mocha.light.css
prism-base16-monokai.dark.css
prism-base16-monokai.light.css
prism-base16-ocean.dark.css
prism-base16-ocean.light.css
prism-base16-paraiso.dark.css
prism-base16-paraiso.light.css
prism-base16-pop.dark.css
prism-base16-pop.light.css
prism-base16-railscasts.dark.css
prism-base16-railscasts.light.css
prism-base16-shapeshifter.dark.css
prism-base16-shapeshifter.light.css
prism-base16-solarized.dark.css
prism-base16-solarized.light.css
prism-base16-summerfruit.dark.css
prism-base16-summerfruit.light.css
prism-base16-tomorrow.dark.css
prism-base16-tomorrow.light.css
prism-base16-twilight.dark.css
prism-base16-twilight.light.css
prism-base2tone-cave-dark.css
prism-base2tone-cave-light.css
prism-base2tone-desert-dark.css
prism-base2tone-desert-light.css
prism-base2tone-drawbridge-dark.css
prism-base2tone-drawbridge-light.css
prism-base2tone-earth-dark.css
prism-base2tone-earth-light.css
prism-base2tone-evening-dark.css
prism-base2tone-evening-light.css
prism-base2tone-forest-dark.css
prism-base2tone-forest-light.css
prism-base2tone-heath-dark.css
prism-base2tone-heath-light.css
prism-base2tone-lake-dark.css
prism-base2tone-lake-light.css
prism-base2tone-meadow-dark.css
prism-base2tone-meadow-light.css
prism-base2tone-morning-dark.css
prism-base2tone-morning-light.css
prism-base2tone-pool-dark.css
prism-base2tone-pool-light.css
prism-base2tone-sea-dark.css
prism-base2tone-sea-light.css
prism-base2tone-space-dark.css
prism-base2tone-space-light.css
prism-base2tone-suburb-dark.css
prism-base2tone-suburb-light.css
prism-cb.css
prism-coldark-cold.css
prism-coldark-dark.css
prism-coy-without-shadows.css
prism-coy.css
prism-darcula.css
prism-dark.css
prism-dracula.css
prism-duotone-dark.css
prism-duotone-earth.css
prism-duotone-forest.css
prism-duotone-light.css
prism-duotone-sea.css
prism-duotone-space.css
prism-funky.css
prism-ghcolors.css
prism-gruvbox-dark.css
prism-gruvbox-light.css
prism-holi-theme.css
prism-hopscotch.css
prism-laserwave.css
prism-lucario.css
prism-material-dark.css
prism-material-light.css
prism-material-oceanic.css
prism-night-owl.css
prism-nord.css
prism-okaidia.css
prism-one-dark.css
prism-one-light.css
prism-pojoaque.css
prism-shades-of-purple.css
prism-solarized-dark-atom.css
prism-solarizedlight.css
prism-synthwave84.css
prism-tomorrow.css
prism-twilight.css
prism-vs.css
prism-vsc-dark-plus.css
prism-xonokai.css
prism-z-touch.css

Check out a live test or a live demo.

Customizaton of languages, plugins and built-in themes

To customize the Prism you will need to customize the prism.js file. This requires cloning our Forked repository (it contains some extra languages and styling tweaks) from: https://github.com/getgrav/prism

Then run the following commands:

npm run build
npm run start

The second command starts a built-in webserver. Locate the prism.js file included in this plugin, and view the source, Find the build URL and paste that into your browser. It should look something like:

http://127.0.0.1:8080/download.html#themes=prism&languages=markup+css+clike+javascript+apacheconf+bash+bbcode+c+csharp+cpp+coffeescript+css-extras+diff+docker+ecscript+git+go+java+json+json5+less+lua+markdown+markup-templating+php+php-extras+python+regex+ruby+sass+scss+sql+twig+yaml&plugins=line-highlight+line-numbers+command-line+toolbar+copy-to-clipboard

This pre-configures the languages, plugins, etc.

Make your changes, including adding additional languages, plugins etc. Then click DOWNLOAD JS and DOWNLOAD CSS buttons and upload your copies to a safe location, e.g. /user/data/prims-highlight/.

You can then edit the configuration of the prism-highlight plugin and point the custom.js_location and custom.css_location options to the custom file locations (default is already user://data/prismjs folder).