120 lines
4.3 KiB
Ruby
120 lines
4.3 KiB
Ruby
module Sass::Script::Functions
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def sprite_url(file)
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dir, name, basename = extract_names(file)
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sprite = sprite_for("#{dir}#{name}")
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Sass::Script::SpriteInfo.new(:url, sprite)
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end
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def sprite_position(file, position_x = nil, position_y_shift = nil, margin_top_or_both = nil, margin_bottom = nil)
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sprite, sprite_item = sprite_url_and_position(file, position_x, position_y_shift, margin_top_or_both, margin_bottom)
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Sass::Script::SpriteInfo.new(:position, sprite, sprite_item, position_x, position_y_shift)
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end
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def sprite_image(file, position_x = nil, position_y_shift = nil, margin_top_or_both = nil, margin_bottom = nil)
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sprite, sprite_item = sprite_url_and_position(file, position_x, position_y_shift, margin_top_or_both, margin_bottom)
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Sass::Script::SpriteInfo.new(:both, sprite, sprite_item, position_x, position_y_shift)
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end
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alias_method :sprite_img, :sprite_image
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def sprite_files_in_folder(folder)
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assert_type folder, :String
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count = sprite_file_list_from_folder(folder).length
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Sass::Script::Number.new(count)
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end
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def sprite_file_from_folder(folder, n)
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assert_type folder, :String
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assert_type n, :Number
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file = sprite_file_list_from_folder(folder)[n.to_i]
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file = File.basename(file)
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Sass::Script::String.new(File.join(folder.value, file))
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end
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def sprite_name(file)
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dir, name, basename = extract_names(file)
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Sass::Script::String.new(name)
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end
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def image_basename(file)
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dir, name, basename = extract_names(file, :check_file => true)
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Sass::Script::String.new(basename)
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end
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private
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def sprite_file_list_from_folder(folder)
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dir = File.join(Lemonade.sprites_path, folder.value)
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Dir.glob(File.join(dir, '*.png')).sort
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end
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def sprite_url_and_position(file, position_x = nil, position_y_shift = nil, margin_top_or_both = nil, margin_bottom = nil)
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dir, name, basename = extract_names(file, :check_file => true)
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filestr = File.join(Lemonade.sprites_path, file.value)
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sprite_file = "#{dir}#{name}.png"
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sprite = sprite_for(sprite_file)
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sprite_item = image_for(sprite, filestr, position_x, position_y_shift, margin_top_or_both, margin_bottom)
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# Create a temporary destination file so compass doesn't complain about a missing image
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FileUtils.touch File.join(Lemonade.images_path, sprite_file)
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[sprite, sprite_item]
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end
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def extract_names(file, options = {})
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assert_type file, :String
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unless (file.value =~ %r(^(.+/)?([^\.]+?)(/(.+?)\.(png))?$)) == 0
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raise Sass::SyntaxError, 'Please provide a file in a folder: e.g. sprites/button.png'
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end
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dir, name, basename = $1, $2, $4
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if options[:check_file] and basename.nil?
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raise Sass::SyntaxError, 'Please provide a file in a folder: e.g. sprites/button.png'
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end
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[dir, name, basename]
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end
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def sprite_for(file)
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file = "#{file}.png" unless file =~ /\.png$/
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Lemonade.sprites[file] ||= {
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:file => "#{file}",
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:height => 0,
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:width => 0,
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:images => [],
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:margin_bottom => 0
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}
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end
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def image_for(sprite, file, position_x, position_y_shift, margin_top_or_both, margin_bottom)
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image = sprite[:images].detect{ |image| image[:file] == file }
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margin_top_or_both ||= Sass::Script::Number.new(0)
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margin_top = margin_top_or_both.value #calculate_margin_top(sprite, margin_top_or_both, margin_bottom)
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margin_bottom = (margin_bottom || margin_top_or_both).value
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if image
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image[:margin_top] = margin_top if margin_top > image[:margin_top]
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image[:margin_bottom] = margin_bottom if margin_bottom > image[:margin_bottom]
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else
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width, height = ChunkyPNG::Image.from_file(file).size
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x = (position_x and position_x.numerator_units == %w(%)) ? position_x : Sass::Script::Number.new(0)
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y = sprite[:height] + margin_top
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y = Sass::Script::Number.new(y, y == 0 ? [] : ['px'])
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image = {
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:file => file,
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:height => height,
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:width => width,
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:x => x,
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:margin_top => margin_top,
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:margin_bottom => margin_bottom,
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:index => sprite[:images].length
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}
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sprite[:images] << image
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end
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image
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rescue Errno::ENOENT
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raise Sass::SyntaxError, "#{file} does not exist in sprites_dir #{Lemonade.sprites_path}"
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rescue ChunkyPNG::SignatureMismatch
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raise Sass::SyntaxError, "#{file} is not a recognized png file, can't use for sprite creation"
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end
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end
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