Class: JekyllImgFlow::PictureTagAdaptor

Inherits:
Object
  • Object
show all
Defined in:
lib/jekyll-imgflow/picture_tag_adaptor.rb

Overview

Adaptor that translates Jekyll Picture Tag syntax to ImgFlow syntax Simple tag-to-tag translation with values

Instance Method Summary collapse

Constructor Details

#initialize(site, config) ⇒ PictureTagAdaptor

Returns a new instance of PictureTagAdaptor.



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# File 'lib/jekyll-imgflow/picture_tag_adaptor.rb', line 7

def initialize(site, config)
  @site = site
  @config = config
end

Instance Method Details

#to_imgflow_tag(picture_markup) ⇒ String

Convert Picture Tag to ImgFlow tag markup that can be used in templates

Parameters:

  • picture_markup (String) —

    Picture Tag markup

Returns:

  • (String) —

    ImgFlow tag markup with attributes



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# File 'lib/jekyll-imgflow/picture_tag_adaptor.rb', line 15

def to_imgflow_tag(picture_markup)
  result = translate_to_imgflow(picture_markup)
  return "" if result[:markup].empty?

  # Build ImgFlow tag with attributes
  tag_parts = ["{% imgflow", result[:markup]]

  # Add HTML attributes
  tag_parts << "alt:\"#{result[:attributes][:alt]}\"" if result[:attributes][:alt]

  if result[:attributes][:img]&.any?
    result[:attributes][:img].each do |name, value|
      tag_parts << "img-#{name}:\"#{value}\""
    end
  end

  if result[:attributes][:picture]&.any?
    result[:attributes][:picture].each do |name, value|
      tag_parts << "picture-#{name}:\"#{value}\""
    end
  end

  tag_parts << "%}"
  tag_parts.join(" ")
end

#translate_to_imgflow(picture_markup) ⇒ Hash

Convert Picture Tag markup to ImgFlow markup with HTML attributes

Parameters:

  • picture_markup (String) —

    Picture Tag markup like "picture hero image.jpg 16:9 --alt Text %"

Returns:

  • (Hash) —

    Translation result with markup and attributes



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# File 'lib/jekyll-imgflow/picture_tag_adaptor.rb', line 44

def translate_to_imgflow(picture_markup)
  # Extract content between {% picture ... %}
  match = picture_markup.match(/\{%\s*picture\s+(.+?)\s*%}/)
  return { markup: "", attributes: {} } unless match

  content = match[1].strip
  return { markup: "", attributes: {} } if content.empty?

  # Parse arguments
  args = parse_arguments(content)
  return { markup: "", attributes: {} } if args.empty?

  # Step 1: Categorize arguments by type
  categorized = categorize_arguments(args)
  return { markup: "", attributes: {} } unless categorized[:image]

  # Step 2: Translate each category to ImgFlow syntax
  imgflow_parts = []
  imgflow_parts << categorized[:image]
  imgflow_parts += translate_media_queries(categorized[:media_queries])
  imgflow_parts += translate_operations(categorized[:operations])
  imgflow_parts << "formats:webp,jpg" unless formats?(imgflow_parts)
  imgflow_parts << "markup:#{categorized[:markup_format]}" if categorized[:markup_format] && categorized[:markup_format] != "auto"

  # Step 3: Assemble result
  {
    markup: imgflow_parts.compact.join(" "),
    attributes: categorized[:html_attributes],
    markup_format: categorized[:markup_format]
  }
end