Class: Jekyll::ImgSrcsetTag

Inherits:
Liquid::Tag
  • Object
show all
Defined in:
lib/jekyll-img-srcset.rb

Instance Method Summary collapse

Constructor Details

#initialize(tag_name, text, tokens) ⇒ ImgSrcsetTag

Returns a new instance of ImgSrcsetTag.



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# File 'lib/jekyll-img-srcset.rb', line 169

def initialize(tag_name, text, tokens)
  super
  @text = text
end

Instance Method Details

#render(context) ⇒ Object 



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# File 'lib/jekyll-img-srcset.rb', line 174

def render(context)
  config = context.registers[:site].config
  base_image_path = config["base_image_path"] || "assets/images"
  attrs = {
      classes: [],
  }
  [/(\S+)="([^"]+?)"/, /(\S+)=([^\s\}"][^\s\}]+)/].each do | attr_regex |
      @text.scan(attr_regex) do | key, value |
          if key == "class"
              context_content = check_in_context context, value
              if context_content.nil?
                  attrs[:classes] << value
              else
                  attrs[:classes] << context_content
              end
          else
              context_content = check_in_context context, value
              if context_content.nil?
                  attrs[key.to_sym] = value
              else
                  attrs[key.to_sym] = context_content
              end
          end
      end
  end

  #puts "fs context: #{context.find_variable('first_image')}"
  # puts "Prepare image: #{attrs[:src]}"
  if File.exists?(File.join base_image_path, attrs[:src])
      widths, original_width = resize_image(
          attrs[:src], 
          config["widths"],
          config["destination"], base_image_path)
      context.registers[:site].keep_files.concat(widths.map do |w|
          File.join(base_image_path, "#{w}", attrs[:src])
      end)
      format_image(attrs, widths, original_width,
          attrs[:src], attrs[:caption], attrs[:title], 
          context.registers[:site].baseurl, base_image_path)
  else
      puts "image not found: #{File.join base_image_path, attrs[:src]} in page at url #{context["page"]["url"]}"
      ""
  end
end