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Contents
# frozen_string_literal: true
module Jekyll
module Filters
module Menu
# Verifies if the given URL is an active item on the menu.
#
# Example usage:
#
# {% assign active_url = page.url | menu_active %}
# {% for item in site.i18n.menu.items %}
# <a
# href="{{ item.href }}"
# class="{{ page.url | menu_active | equals: item.href | ternary: 'active', '' }}">
#
# {{ item.title }}
# </a>
# {% endfor %}
#
# @param [String] The URL to be verified
# @return [String] The item URL
def menu_active_item(page_url)
site_menu&.find do |key, _value|
key == page_url || page_url.start_with?(key)
end&.last
end
# The menu is defined in a data file that corresponds to the site
# language. This method converts the menu items into a map of URL
# parts and actual URLs.
#
# @see _data/es.yml
# @see {https://0xacab.org/sutty/jekyll/jekyll-locales}
# @return [Hash]
def site_menu
site = @context.registers[:site]
@site_menu ||= site.data.dig(site.config['locale'], 'menu', 'items')&.reduce({}) do |menu, item|
# If the item has a layout, we pick the first post and update
# the href. We can't do the same for all posts because we
# wouldn't be able to cache the menu.
if item['layout']
doc = site.documents.find do |doc|
doc.data['layout'] == item['layout']
end
item['href'] = doc&.url
end
# Ignore empty or anchor items
next menu if item['href'].nil? || item['href']&.empty? || item['href']&.start_with?('#')
menu[item['href']] = item['href']
item['active']&.each do |a|
menu[a] = item['href']
end
menu
end
end
end
end
end
Liquid::Template.register_filter(Jekyll::Filters::Menu)
Version data entries
18 entries across 18 versions & 1 rubygems