Module: GWebFont::Helper

Includes:
ActionView::Helpers::TagHelper
Defined in:
lib/g_web_font/view_helpers.rb

Constant Summary collapse

BASE_URL = 
"fonts.googleapis.com/css?family=".freeze

Instance Method Summary collapse

Instance Method Details

Public: Generates a Google Webfonts link tag

options - The font options. This can be a String, Symbol, or Hash, or

a combination of all three. If you need to specify a font
size, use a Hash, otherwise a String or Symbol will work.

Examples

google_webfonts_link_tag "Droid Sans"
# => '<link href="http://fonts.googleapis.com/css?family=Droid+Sans" rel="stylesheet" type="text/css" />'

google_webfonts_link_tag :droid_sans
# => '<link href="http://fonts.googleapis.com/css?family=Droid+Sans" rel="stylesheet" type="text/css" />'

google_webfonts_link_tag :droid_sans => [400, 700]
# => '<link href="http://fonts.googleapis.com/css?family=Droid+Sans:400,700" rel="stylesheet" type="text/css" />'

google_webfonts_link_tag :droid_sans => [400, 700],
                         :yanone_kaffeesatz => [300, 400]
# => '<link href="http://fonts.googleapis.com/css?family=Droid+Sans:400,700|Yanone+Kaffeesatz:300,400" rel="stylesheet" type="text/css" />'

google_webfonts_link_tag "Droid Sans",
                         :yanone_kaffeesatz => 400
# => '<link href="http://fonts.googleapis.com/css?family=Droid+Sans|Yanone+Kaffeesatz:400" rel="stylesheet" type="text/css" />'

Returns a <link> tag for the Google Webfonts stylesheet. Raises ArgumentError if no options are passed. Raises ArgumentError if an option is not a Symbol, String, or Hash. Raises ArgumentError if a size is not a String or Fixnum.

Raises:

  • (ArgumentError) 


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# File 'lib/g_web_font/view_helpers.rb', line 45

def google_webfonts_link_tag(*options)
  raise ArgumentError, "expected at least one font" if options.empty?

  fonts = []

  options.each do |option|
    case option.class.to_s
    when "Symbol", "String"
      # titleize the font name
      font_name = option.to_s.titleize

      # replace any spaces with pluses
      font_name = font_name.gsub(" ", "+")

      # include the font
      fonts << font_name
    when "Hash"
      fonts += option.inject([]) do |result, (font_name, sizes)|
        # ensure sizes is an Array
        sizes = Array(sizes)

        sizes.all? do |size|
          unless size.class == Fixnum || size.class == String
            raise ArgumentError, "expected a Fixnum or String, got a #{ size.class }"
          end
        end

        # convert font name into a String
        font_name = font_name.to_s

        # replace underscores with spaces
        # and titleize the font name
        font_name = font_name.gsub("_", " ")
        font_name = font_name.titleize

        # convert the spaces into pluses 
        font_name = font_name.gsub(" ", "+")

        # return font_name:sizes where
        # sizes is a comma separated list
        result << "#{ font_name }:#{ sizes.join(",") }"
      end
    else
      raise ArgumentError, "expected a String, Symbol, or a Hash, got a #{ option.class }"
    end
  end

  # the fonts are separated by pipes
  family = fonts.join("|")

  # generate https links if we are an https site
  request.ssl? ? request_method = "https" : request_method = "http"

  # return the link tag
  tag 'link', {
      :rel  => :stylesheet,
      :type => Mime::CSS,
      :href => "http://#{ BASE_URL }#{ family }",
      :href => "#{ request_method }://#{ BASE_URL }#{ family }"
    },
    false,
    false
end

#web_font_options_for_select(selected = nil) ⇒ Object

Generates the options for select for the Google Web Fonts



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# File 'lib/g_web_font/view_helpers.rb', line 9

def web_font_options_for_select(selected=nil)
  options_for_select([''] | GWebFont::WebFont.list_fonts, selected)
end