Class: Jekyll::ImgSrcsetTag

Inherits:

Liquid::Tag

• Object
• Liquid::Tag
• Jekyll::ImgSrcsetTag

Defined in:

lib/jekyll-img-srcset.rb

Instance Method Summary

• #cache ⇒ Object
• #initialize(tag_name, text, tokens) ⇒ ImgSrcsetTag constructor

  A new instance of ImgSrcsetTag.

• #render(context) ⇒ Object

Constructor Details

#initialize(tag_name, text, tokens) ⇒ ImgSrcsetTag

Returns a new instance of ImgSrcsetTag.

# File 'lib/jekyll-img-srcset.rb', line 201

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

Instance Method Details

#cache ⇒ Object

# File 'lib/jekyll-img-srcset.rb', line 197

def cache
  @@cache ||= Jekyll::Cache.new("Jekyll::ImgSrcset")
end

#render(context) ⇒ Object

# File 'lib/jekyll-img-srcset.rb', line 206

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

  if File.exists?(File.join base_image_path, attrs[:src])
      widths, original_width = resize_image(
          attrs[:src], 
          config["widths"],
          config["destination"], base_image_path, cache)
      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