Module: Artwork::Model

Defined in:
lib/artwork/model.rb

Instance Method Summary collapse

Instance Method Details

#artwork_thumb_for(attachment_name, size, alternative_sizes = nil) ⇒ Object 



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# File 'lib/artwork/model.rb', line 5

def artwork_thumb_for(attachment_name, size, alternative_sizes = nil)
  size = determine_alternative_size_for(alternative_sizes) || size

  size, base_resolution = size.to_s.split('@')
  base_resolution ||= Artwork.base_resolution

  desired_thumb = Thumbnail.new(size)
  matching_thumb_name = nil

  ratio_for_current_resolution = base_resolution.to_f / Artwork.current_resolution.to_f

  if desired_thumb.compatible?
    desired_size = desired_thumb.width / ratio_for_current_resolution

    thumbs = attachment_styles_for(attachment_name).map { |thumb_name| Thumbnail.new(thumb_name) }

    thumbs = thumbs \
      .select(&:compatible?) \
      .reject(&:retina?) \
      .select { |thumb| desired_thumb.label.nil? or desired_thumb.label == thumb.label.to_s } \
      .select { |thumb| desired_thumb.aspect_ratio.nil? or desired_thumb.same_aspect_ratio_with?(thumb) } \
      .sort

    thumbs.each do |thumb|
      if desired_size <= thumb.width
        matching_thumb_name = thumb.name
        break
      end
    end

    # If we did not find any matching attachment definitions,
    # the desired size is probably larger than all of our thumb widths,
    # So pick the last (largest) one we have.
    return nil if thumbs.empty?
    matching_thumb_name ||= thumbs.last.name
  end

  matching_thumb_name ||= size.to_sym

  if Artwork.load_2x_images? and attachment_styles_for(attachment_name).include?(:"#{matching_thumb_name}_2x")
    matching_thumb_name = :"#{matching_thumb_name}_2x"
  end

  matching_thumb_name.to_sym
end

#artwork_url(attachment_name, size, options = {}) ⇒ Object 



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# File 'lib/artwork/model.rb', line 51

def artwork_url(attachment_name, size, options = {})
  thumb_name = artwork_thumb_for(attachment_name, size, options)
  send(attachment_name).url(thumb_name, options)
end

#attachment_styles_for(attachment_name) ⇒ Object 



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# File 'lib/artwork/model.rb', line 56

def attachment_styles_for(attachment_name)
  self.class.attachment_definitions[attachment_name.to_sym][:styles].keys
end