Class: Svgr::Arrange::Grid

Inherits:
Object
  • Object
show all
Defined in:
lib/svgr/arrange/grid.rb

Class Method Summary collapse

Class Method Details

.create_combined_svg(elements, rows, columns, scaling_factor, margin: {}) ⇒ Object 



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# File 'lib/svgr/arrange/grid.rb', line 100

def create_combined_svg(
  elements,
  rows,
  columns,
  scaling_factor,
  margin: {}
)
  margin_top = margin.fetch(:top, 0)
  margin_left = margin.fetch(:left, 0)

  width =
    columns * 100 * scaling_factor +
    (columns - 1) * margin_left * scaling_factor
  height =
    rows * 100 * scaling_factor + (rows - 1) * margin_top * scaling_factor

  combined_svg =
    Nokogiri::XML::Builder.new(encoding: "UTF-8") do |xml|
      xml.svg(
        xmlns: "http://www.w3.org/2000/svg",
        width: width,
        height: height,
      ) do
        elements.each_with_index do |element, index|
          row = index / columns
          col = index % columns

          # Adjust the 'transform' attribute to position and scale the element in the grid
          x =
            col * (100 * scaling_factor + margin_left * scaling_factor) +
            (width - 100 * scaling_factor) / 2
          y = row * (100 * scaling_factor + margin_top * scaling_factor)

          # Offset by half the size of the element vertically and horizontally
          x += 50 * scaling_factor
          y += 50 * scaling_factor

          transform = "translate(#{x}, #{y}) scale(#{scaling_factor})"
          element["transform"] = transform
          xml.parent << element
        end
      end
    end

  combined_svg.to_xml
end

.extract_svg_elements(svg_content) ⇒ Object 



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# File 'lib/svgr/arrange/grid.rb', line 81

def extract_svg_elements(svg_content)
  doc = Nokogiri.XML(svg_content)
  doc.remove_namespaces!
  top_level_groups = doc.xpath("//svg/g")

  if top_level_groups.empty?
    # Wrap all child elements of the SVG document in a group
    svg_element = doc.at_xpath("//svg")
    new_group = Nokogiri::XML::Node.new("g", doc)

    svg_element.children.each { |child| new_group.add_child(child) }

    svg_element.add_child(new_group)
    top_level_groups = [new_group]
  end

  top_level_groups
end

.read_svg_file(file) ⇒ Object 



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# File 'lib/svgr/arrange/grid.rb', line 77

def read_svg_file(file)
  File.read(file)
end

.start(argv) ⇒ Object 



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# File 'lib/svgr/arrange/grid.rb', line 10

def start(argv)
  options = {
    scaling_factor: 1,
    margin_top: 0,
    margin_left: 0,
  }

  opt_parser =
    OptionParser.new do |opts|
      opts.banner =
        "Usage: svgr arrange:grid [options] <file_paths> <rows> <columns>"

      opts.on(
        "-s",
        "--scaling-factor FACTOR",
        Float,
        "Scaling factor for the SVG elements",
      ) { |s| options[:scaling_factor] = s }

      opts.on(
        "-t",
        "--margin-top MARGIN",
        Integer,
        "Top margin between the SVG elements",
      ) { |t| options[:margin_top] = t }

      opts.on(
        "-l",
        "--margin-left MARGIN",
        Integer,
        "Left margin between the SVG elements",
      ) { |l| options[:margin_left] = l }

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

  if argv.length < 3
    puts opt_parser.help
    exit(1)
  end

  file_paths, rows, columns = argv.shift(3)
  rows = rows.to_i
  columns = columns.to_i
  svg_files = file_paths.split(",")[0...rows * columns]

  combined_elements =
    svg_files.flat_map do |file|
      content = read_svg_file(file)
      extract_svg_elements(content)
    end

  combined_svg = create_combined_svg(
    combined_elements,
    rows,
    columns,
    options[:scaling_factor],
    margin: { top: options[:margin_top], left: options[:margin_left] },
  )

  write_svg(combined_svg)
end

.write_svg(svg) ⇒ Object 



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# File 'lib/svgr/arrange/grid.rb', line 147

def write_svg(svg)
  puts svg
end