Class: Svgr::Document::Resize

Inherits:
Object
  • Object
show all
Defined in:
lib/svgr/document/resize.rb

Class Method Summary collapse

Class Method Details

.resize(content, width, height) ⇒ Object 



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# File 'lib/svgr/document/resize.rb', line 38

def resize(content, width, height)
  doc = Nokogiri.XML(content)
  doc.remove_namespaces!
  svg_element = doc.at_xpath("/svg")

  # Get the original SVG width and height
  svg_width = svg_element["width"].to_i
  svg_height = svg_element["height"].to_i

  # Calculate width and height in pixels using a DPI of 96
  width_px = (width * 96 / 25.4).round
  height_px = (height * 96 / 25.4).round

  # Calculate the difference between the new width and height and the original width and height
  width_diff = (width_px - svg_width) / 2
  height_diff = (height_px - svg_height) / 2

  # Update the width and height attributes of the SVG element
  svg_element["width"] = width_px
  svg_element["height"] = height_px

  # Create a new group element to wrap all the existing elements and apply the translation
  new_group = Nokogiri::XML::Node.new("g", doc)
  new_group["transform"] = "translate(#{width_diff}, #{height_diff})"
  svg_element.children.each do |child|
    new_group.add_child(child)
  end
  svg_element.add_child(new_group)

  doc
end

.start(argv) ⇒ Object 



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# File 'lib/svgr/document/resize.rb', line 10

def start(argv)
  parser = OptionParser.new do |opts|
    opts.banner = "Usage: svgr document:resize <width> <height>"

    opts.on("-h", "--help", "Prints this help") do
      puts opts
      exit
    end
  end
  parser.parse!(argv)

  if argv.size < 2
    puts parser.help
    exit(1)
  end

  width = argv[0].to_f
  height = argv[1].to_f

  svg_content = $stdin.read

  resized_svg = resize(svg_content, width, height)

  # Write the output
  output = resized_svg.to_xml
  puts output
end