Module: Emjay::Fonts

Defined in:
lib/emjay/helpers/fonts.rb

Class Method Summary collapse

Class Method Details

.build_tags(content, inline_style, fonts = {}) ⇒ Object

Builds font import tags (<link> and @import) for fonts used in the content. Port of fonts.js buildFontsTags



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# File 'lib/emjay/helpers/fonts.rb', line 7

def self.build_tags(content, inline_style, fonts = {})
  to_import = []

  fonts.each do |name, url|
    regex = /"[^"]*font-family:[^"]*#{Regexp.escape(name)}[^"]*"/mi
    inline_regex = /font-family:[^;}]*#{Regexp.escape(name)}/mi

    if content.match?(regex) || inline_style.any? { |s| s.match?(inline_regex) }
      to_import << url
    end
  end

  return "" if to_import.empty?

  links = to_import.map { |url| %(<link href="#{url}" rel="stylesheet" type="text/css">) }.join("\n")
  imports = to_import.map { |url| "@import url(#{url});" }.join("\n")

  <<~HTML
    <!--[if !mso]><!-->
      #{links}
      <style type="text/css">
        #{imports}
      </style>
    <!--<![endif]-->
  HTML
end