draw.rb

gistfile1.rb

require 'rubygems'
require 'json'
require 'cairo'
require 'uri'

format = Cairo::FORMAT_RGB24
width = 1200
height = 1600

def draw_rects(g, ls)
	ls.each{|elem|
		x = elem["x"]
		y = elem["y"]
		w = elem["w"]
		h = elem["h"]
		
		is_img = (elem['tagname'] == 'img')
		
		if is_img
			g.set_source_rgb(0.1, 0.2, 0.4)
		else
			g.set_source_rgb(0.1, 0.4, 0.2)
		end
		
		g.rectangle(x, y, w, h)
		g.fill

		if is_img
			g.set_source_rgb(0.7, 0.9, 1)
		else
			g.set_source_rgb(0.7, 1, 0.9)
		end
		g.rectangle(x, y, w, h)
		g.stroke
		
		g.select_font_face("Arial",0,0)
		
		2.times{|i|
			g.save
			g.translate(x+2-i, y+h/2+8-i)
			i==0 ? g.set_source_rgb(0, 0, 0) : g.set_source_rgb(1, 1, 1)
			
			if is_img
				g.set_font_size(16)
				g.text_path(URI.parse(elem["url"]).path)
			else
				g.set_font_size(26)
				g.text_path("[Object]")
			end
			g.fill
			g.restore
		}
				
		STDERR.print('.')
	}
	STDERR.puts("done")
end

infile = ARGV[0]
surface = Cairo::ImageSurface.new(format, width, height)
g = Cairo::Context.new(surface)

elem_list = nil
File.open(infile || "test.json") {|f|
	elem_list = JSON.parse(f.read)
}
draw_rects(g, elem_list)

surface.write_to_png("boxes.png")