core/lib/compass/core/sass_extensions/functions/inline_image.rb
module Compass::Core::SassExtensions::Functions::InlineImage
def inline_image(path, mime_type = nil)
path = path.value
real_path = File.join(Compass.configuration.images_path, path)
inline_image_string(data(real_path), compute_mime_type(path, mime_type))
end
def inline_font_files(*args)
files = []
with_each_font_file(*args) do |path, type|
path = path.value
real_path = File.join(Compass.configuration.fonts_path, path)
data = inline_image_string(data(real_path), compute_mime_type(path))
files << list(data, unquoted_string("format('#{type}')"), :space)
end
list(files, :comma)
end
protected
def inline_image_string(data, mime_type)
data = [data].flatten.pack('m').gsub("\n","")
url = "url('data:#{mime_type};base64,#{data}')"
unquoted_string(url)
end
private
def compute_mime_type(path, mime_type = nil)
return mime_type.value if mime_type
case path
when /\.png$/i
'image/png'
when /\.jpe?g$/i
'image/jpeg'
when /\.gif$/i
'image/gif'
when /\.svg$/i
'image/svg+xml'
when /\.otf$/i
'font/opentype'
when /\.eot$/i
'application/vnd.ms-fontobject'
when /\.ttf$/i
'font/truetype'
when /\.woff$/i
'application/font-woff'
when /\.off$/i
'font/openfont'
when /\.([a-zA-Z]+)$/
"image/#{Regexp.last_match(1).downcase}"
else
raise Compass::Error, "A mime type could not be determined for #{path}, please specify one explicitly."
end
end
def data(real_path)
if File.readable?(real_path)
File.open(real_path, "rb") {|io| io.read}
else
raise Compass::Error, "File not found or cannot be read: #{real_path}"
end
end
end