Fancybox.rb

Fancybox.rb

# encoding: utf-8

module Jekyll
  class Fancybox < Liquid::Tag
    BASE_URL = "http://gehaxelt.in"

    def initialize(name, params, tokens)
      super
      @msg = "Params of 'fancybox' have to be [img_url] \"[title]\" \"[alt]\""

      @img_url = scan_url(params).strip
      @title   = scan_quoted(params, 0).strip
      @alt     = scan_quoted(params, 1).strip
      raise ArgumentError, @msg if @img_url && @img_url.empty?
    end

    def render(context)
      link = anker(:href => @img_url) do
        img({
          :img_url => @img_url,
          :alt => @alt,
          :title => @title
        })
      end
      %(#{link})
    end

    private

    def scan_url(text)
      text.scan(/^\s*(\S+?)\s+/)[0][0]
    end

    def scan_quoted(text, num)
      text.scan(/(["'])(.*?)\1/)[num][1]
    end

    def url(uri)
      "#{BASE_URL}/images/posts/small/#{uri}"
    end

    def img(options={})
      img_url = options[:img_url]
      alt     = options[:alt]
      title   = options[:title]
      "<img src=\"#{url(img_url)}\" alt=\"#{alt}\" title=\"#{title}\" />"
    end

    def anker(options={})
      href = options[:href]
      "<a href=\"#{url(href)}\" class=\"fancybox\" >#{yield}</a>"
    end

  end
end

Liquid::Template.register_tag('fancybox', Jekyll::Fancybox)