Module: Sass::Script::Functions

Includes:
Compass::ImgDelivery
Defined in:
lib/img-delivery/functions.rb

Instance Method Summary collapse

Instance Method Details

#img2b64(file) ⇒ Object 



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# File 'lib/img-delivery/functions.rb', line 166

def img2b64(file)
    Base64.encode64(File.read(file)).gsub("\n", '')
end

#img_delivery(images_dir = '', css_dir = '', js_dir = '') ⇒ Object 



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# File 'lib/img-delivery/functions.rb', line 67

def img_delivery(images_dir = '', css_dir = '', js_dir = '')

    begin

    directory_path = Compass.configuration.images_path + images_dir.value
    png_path = directory_path + 'png/'
    svg_scss_content = ""
    png_scss_content = ""
    fallback_scss_content = ""
    oupput_types = ['svg', 'png', 'fallback']
    css_basename = File.basename(css_dir.value) || 'images'
    css_dir = File.dirname(css_dir.value) + '/'


    Dir.mkdir(png_path) unless Dir.exists?(png_path)

    Dir["#{directory_path}svg/*.svg"].each do |file|
        basename = File.basename(file, ".svg")
        outputfile = png_path + basename + '.png'

        # svg data-uri css rule
        svg_data_uri = img2b64(file)
        svg_scss_content << scss_rule(basename, "image/svg+xml", svg_data_uri )

        if !File.exists?(outputfile)
            # make png/ dir if not exists
            mkdir_if_not_exists(outputfile)
            # create png files with svg2png command
            cmd = "svg2png #{file} #{outputfile}"
            puts "Writing #{outputfile}"
            # exec shell command
            shell = %x[ #{cmd} ]
        end

        # png data-uri css rule
        png_data_uri = img2b64(outputfile)
        png_scss_content << scss_rule(basename, "image/png", png_data_uri)

        # png fallback css rule
        fallback_img_path =  "/" + Compass.configuration.images_dir + "#{images_dir.value}png"
        fallback_scss_content << fallback_scss_rule(basename, fallback_img_path)
    end


    src_css_path = Compass.configuration.css_path + css_dir + '.img-delivery/'
    css_path = Compass.configuration.css_path + css_dir

    # CREATE SOURCE PARTIALS

    src_style_basename = "_#{css_basename}"
    src_svg_scss_file = src_css_path + "#{src_style_basename}-svg.scss"
    src_png_scss_file = src_css_path + "#{src_style_basename}-png.scss"
    src_fallback_scss_file = src_css_path + "#{src_style_basename}-fallback.scss"

    # mkdir_if_not_exists(svg_scss_file)
    mkdir_if_not_exists(src_svg_scss_file)

    # copy original file, to import different files for each image-type-stylesheet
    src_file = css_path + "_#{css_basename}.scss"
    FileUtils.cp(src_file, src_svg_scss_file)
    FileUtils.cp(src_file, src_png_scss_file)
    FileUtils.cp(src_file, src_fallback_scss_file)

    # CREATE FINAL SCSS
    svg_scss_content << "@import '#{src_css_path}_#{css_basename}-svg.scss';"
    png_scss_content << "@import '#{src_css_path}_#{css_basename}-png.scss';"
    fallback_scss_content << "@import '#{src_css_path}_#{css_basename}-fallback.scss';"

    # output paths
    svg_scss_file = css_path + "#{css_basename}-svg.css.scss"
    png_scss_file = css_path + "#{css_basename}-png.css.scss"
    fallback_scss_file = css_path + "#{css_basename}-fallback.css.scss"

    # create svg.scss file
    write_file(svg_scss_file, svg_scss_content)

    # create png.scss file
    write_file(png_scss_file, png_scss_content)

    # create fallback.scss file
    write_file(fallback_scss_file, fallback_scss_content)

    # create js file
    js_content = File.open(File.join(File.dirname(__FILE__), "../javascripts/img-delivery.js"), "rb")
    js_content = js_content.read
    js_path = Compass.configuration.javascripts_path + "#{js_dir.value}"
    js_file = js_path + '.js'

    mkdir_if_not_exists(js_file)
    write_file(js_file, js_content)

    rescue Exception => e
        puts 'Ups! There was an error:'
        puts e.inspect
    end

    Sass::Script::String.new("")
end