Module: Ea::Shapescript::Renderer

Defined in:
lib/ea/shapescript/renderer.rb

Overview

Renders a list of parsed Shape primitives to SVG elements as a single string. Coordinates are emitted as-is — callers should wrap in a <g> with the appropriate transform if they want to position the icon.

Class Method Summary collapse

Class Method Details

.escape(text) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 38

def escape(text)
  text.to_s.gsub("&", "&amp;")
       .gsub("<", "&lt;")
       .gsub(">", "&gt;")
end

.render(shapes, fill: "#FFFFFF", stroke: "#000000") ⇒ String

Returns SVG fragment with one element per shape.

Parameters:

  • shapes (Array<Shape>)
  • fill (String) (defaults to: "#FFFFFF") —

    SVG fill color

  • stroke (String) (defaults to: "#000000") —

    SVG stroke color

Returns:

  • (String) —

    SVG fragment with one element per shape



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# File 'lib/ea/shapescript/renderer.rb', line 16

def render(shapes, fill: "#FFFFFF", stroke: "#000000")
  return "" if shapes.nil? || shapes.empty?

  shapes.map { |s| render_one(s, fill: fill, stroke: stroke) }.join("\n")
end

.render_ellipse(p, fill, stroke) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 49

def render_ellipse(p, fill, stroke)
  cx, cy, rx, ry = p
  %(<ellipse cx="#{cx}" cy="#{cy}" rx="#{rx}" ry="#{ry}" fill="#{fill}" stroke="#{stroke}"/>)
end

.render_label(p, fill) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 33

def render_label(p, fill)
  text = p.first.to_s
  %(<text x="0" y="0" fill="#{fill}">#{escape(text)}</text>)
end

.render_line(p, stroke) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 59

def render_line(p, stroke)
  x1, y1, x2, y2 = p
  %(<line x1="#{x1}" y1="#{y1}" x2="#{x2}" y2="#{y2}" stroke="#{stroke}"/>)
end

.render_one(shape, fill:, stroke:) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 22

def render_one(shape, fill:, stroke:)
  case shape.kind
  when :rectangle then render_rect(shape.params, fill, stroke)
  when :ellipse then render_ellipse(shape.params, fill, stroke)
  when :polygon then render_polygon(shape.params, fill, stroke)
  when :line then render_line(shape.params, stroke)
  when :path then render_path(shape.params, stroke)
  when :label then render_label(shape.params, fill)
  end
end

.render_path(p, stroke) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 64

def render_path(p, stroke)
  return "" if p.empty?

  x, y = p.shift(2)
  d = "M #{x} #{y}"
  p.each_slice(2) { |px, py| d += " L #{px} #{py}" }
  %(<path d="#{d}" fill="none" stroke="#{stroke}"/>)
end

.render_polygon(p, fill, stroke) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 54

def render_polygon(p, fill, stroke)
  points = p.each_slice(2).map { |x, y| "#{x},#{y}" }.join(" ")
  %(<polygon points="#{points}" fill="#{fill}" stroke="#{stroke}"/>)
end

.render_rect(p, fill, stroke) ⇒ Object 



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# File 'lib/ea/shapescript/renderer.rb', line 44

def render_rect(p, fill, stroke)
  x, y, w, h = p
  %(<rect x="#{x}" y="#{y}" width="#{w}" height="#{h}" fill="#{fill}" stroke="#{stroke}"/>)
end