Module: Polygonfy

Defined in:
lib/polygonfy.rb,
lib/polygonfy/Point.rb,
lib/polygonfy/version.rb

Defined Under Namespace

Classes: Point

Constant Summary collapse

MARGIN = 
12
STYLES = 
{
  polygon: "fill:#4f9bff; stroke:#216cce; stroke-width:1; opacity:0.5",
  circle: "fill:orange"
}
VERSION = 
"0.1.2"

Class Method Summary collapse

Class Method Details

.point_title(array, i) ⇒ Object 



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# File 'lib/polygonfy.rb', line 12

def self.point_title(array, i)
  prev_point = array[i - 1].id
  next_point = array[(i + 1) % array.size].id
  curr_point = "#{array[i].x}, #{array[i].y}"

  "#{prev_point} (#{curr_point}) #{next_point}"
end

.run ⇒ Object 



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# File 'lib/polygonfy.rb', line 20

def self.run
  if ARGV.length == 0
    puts "Use: polygonfy filename [id,x,y] [id,x,y] [..]"
    return
  end

  filename = ARGV[0]

  points = ARGV.length > 1 ? ARGV.drop(1) : STDIN.readline.split(' ')

  points.map! do |p|
    id, x, y = p.split(',')
    Point.new(id, x.to_i, y.to_i)
  end

  xmlns  = "http://www.w3.org/2000/svg"
  width  = points.map(&:x).max + (2 * MARGIN)
  height = points.map(&:y).max + (2 * MARGIN)

  polygon_points = points.map { |p| "#{p.x},#{p.y}" }.join(' ')

  builder = Nokogiri::XML::Builder.new do |xml|
    xml.svg(xmlns: xmlns, width: width, height: height) {
      xml.polygon(style: STYLES[:polygon], points: polygon_points)
      xml.g {
        points.each_with_index do |p, i|
          xml.circle(style: STYLES[:circle], cx: p.x + MARGIN, cy: p.y + MARGIN, r: "12")
          xml.text_(x: p.x + MARGIN, y: p.y + 5 + MARGIN, 'text-anchor': 'middle') {
            xml.text(p.id)
            xml.title {
              xml.text(point_title(points, i))
            }
          }
        end
      }
    }
  end

  File.open(filename, 'w') do |f|
    f.write(builder.to_xml)
  end
end