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Contents
# encoding: utf-8
module Nanoc3::Helpers
# Provides support for breadcrumbs, which allow the user to go up in the
# page hierarchy.
module Breadcrumbs
# Creates a breadcrumb trail leading from the current item to its parent,
# to its parent’s parent, etc, until the root item is reached. This
# function does not require that each intermediate item exist; for
# example, if there is no `/foo/` item, breadcrumbs for a `/foo/bar/` item
# will contain a `nil` element.
#
# @return [Array] The breadcrumbs, starting with the root item and ending
# with the item itself
def breadcrumbs_trail
breadcrumbs_for_identifier(@item.identifier)
end
def item_with_identifier(identifier)
@identifier_cache ||= {}
@identifier_cache[identifier] ||= begin
@items.find { |i| i.identifier == identifier }
end
end
def breadcrumbs_for_identifier(identifier)
@breadcrumbs_cache ||= {}
@breadcrumbs_cache[identifier] ||= begin
head = (identifier == '/' ? [] : breadcrumbs_for_identifier(identifier.sub(/[^\/]+\/$/, '')) )
tail = [ item_with_identifier(identifier) ]
head + tail
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems