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Contents
# encoding: utf-8
module Nanoc3::Filters
class RelativizePaths < Nanoc3::Filter
require 'nanoc3/helpers/link_to'
include Nanoc3::Helpers::LinkTo
# Relativizes all paths in the given content, which can be either HTML or
# CSS. This filter is quite useful if a site needs to be hosted in a
# subdirectory instead of a subdomain. In HTML, all `href` and `src`
# attributes will be relativized. In CSS, all `url()` references will be
# relativized.
#
# @param [String] content The content to filter
#
# @option params [Symbol] :type The type of content to filter; can be either `:html` or `:css`.
#
# @return [String] The filtered content
def run(content, params={})
# Set assigns so helper function can be used
@item_rep = assigns[:item_rep] if @item_rep.nil?
# Filter
# TODO use nokogiri or csspool instead of regular expressions
case params[:type]
when :html
content.gsub(/(<[^>]+\s+(src|href))=(['"]?)(\/.*?)\3([ >])/) do
$1 + '=' + $3 + relative_path_to($4) + $3 + $5
end
when :css
content.gsub(/url\((['"]?)(\/.*?)\1\)/) do
'url(' + $1 + relative_path_to($2) + $1 + ')'
end
else
raise RuntimeError.new(
"The relativize_paths needs to know the type of content to " +
"process. Pass :type => :html for HTML or :type => :css for CSS."
)
end
end
end
end
Version data entries
12 entries across 12 versions & 1 rubygems