Module: Mayu::Resources::Transformers::CSS

Extended by:
T::Sig
Defined in:
lib/mayu/resources/transformers/css.rb,
lib/mayu/resources/transformers/css/rouge_lexer.rb

Defined Under Namespace

Classes: RougeLexer, TransformResult

Class Method Summary collapse

Class Method Details

.escape_string(str) ⇒ Object 



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# File 'lib/mayu/resources/transformers/css.rb', line 139

def self.escape_string(str)
  str.gsub(/[^\w-]/, '\\\\\0')
end

.join_class(klass, exports, classes) ⇒ Object 



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# File 'lib/mayu/resources/transformers/css.rb', line 122

def self.join_class(klass, exports, classes)
  if composes = exports[klass]&.composes
    [
      klass,
      *composes.map do |compose|
        case compose
        in Mayu::CSS::ComposeLocal
          classes[compose.name.to_sym]
        end
      end
    ].join(" ")
  else
    klass
  end
end

.join_classes(classes, elements, exports) ⇒ Object 



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# File 'lib/mayu/resources/transformers/css.rb', line 104

def self.join_classes(classes, elements, exports)
  {
    **classes
      .transform_values { join_class(_1, exports, classes) }
      .transform_keys(&:to_sym),
    **elements
      .transform_values { join_class(_1, exports, classes) }
      .transform_keys { :"__#{_1}" }
  }
end

.merge_classnames(transform_results) ⇒ Object 



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# File 'lib/mayu/resources/transformers/css.rb', line 28

def self.merge_classnames(transform_results)
  classnames = Hash.new { |h, k| h[k] = Set.new }

  transform_results.each do |transform_result|
    transform_result.classes.each do |source, target|
      classnames[source].add(target)
    end
  end

  classnames.transform_values { _1.join(" ") }
end

.transform(source:, source_path:, source_line: 1, minify: true) ⇒ Object 



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# File 'lib/mayu/resources/transformers/css.rb', line 48

def self.transform(source:, source_path:, source_line: 1, minify: true)
  # Required here because it's not necessary in production..
  # kinda messy. need to rewrite the entire "resources" thing...
  require "mayu/css"

  source_path_without_extension =
    File.join(
      File.dirname(source_path),
      File.basename(source_path, ".*")
    ).delete_prefix("./")

  result =
    Mayu::CSS.transform(source_path_without_extension, source, minify:)

  output = result.code.encode("utf-8")

  header = "/* #{source_path} */\n"

  content_hash = Digest::SHA256.digest(output)
  urlsafe_hash = Base64.urlsafe_encode64(content_hash)
  filename = "#{urlsafe_hash}.css"

  layer_name =
    "#{source_path_without_extension}?#{urlsafe_hash.slice(0, 8)}"

  output = "@layer #{escape_string(layer_name)} {\n#{output}\n}"

  TransformResult.new(
    filename:,
    output:,
    layer_name: layer_name,
    classes:
      join_classes(
        result.classes,
        result.elements,
        result.exports
      ).freeze,
    elements: result.elements.transform_keys(&:to_sym),
    content_hash:,
    source_map: {
      "version" => 3,
      "file" => filename,
      "sourceRoot" => "mayu://",
      "sources" => [source_path],
      "sourcesContent" => [source]
    }
  )
end