From: Nathaniel Talbott <nathaniel@...>
Date: 2005-01-10T06:03:07+09:00
Subject: [SOLUTION] Ruby Quiz #14 LCD Numbers

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This was the first quiz I participated in (I've been waiting for one I 
could whip out real quick), and it made a nice programming warm-up 
after being away over the holidays. I added one small bit of 
functionality: a colon, so I could do time displays. However, the colon 
looked ugly when expanded, so I made it so it only expands vertically, 
not horizontally.

The template-based approach I used could probably be used (with a bit 
of tweaking) to allow prettier displays, but I didn't want to show off 
how much I stink at ASCII art by trying myself :-)

Thanks for the quiz!


Nathaniel
Terralien, Inc.

<:((><


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#!/usr/bin/env ruby

module LCD
  class Template
    def self.height(size)
      3 + (2 * size)
    end
  
    def initialize(string, option)
      case option
        when "h"
          @horizontal_stable = true
      end
      @lines = string.gsub(/\./, ' ').split("\n")
    end
    
    def actual_line(line, size)
      case
        when line == 0
          0
        when line == (self.class.height(size) - 1)
          4
        when line < (size + 1)
          1
        when line == (size + 1)
          2
        else
          3
      end
    end
  
    def display(line, size)
      l = @lines[actual_line(line, size)].dup
      l[1, 1] *= size unless(@horizontal_stable)
      l
    end
  end

  TEMPLATES = {}
  DATA.read.scan(/=([^\n])([a-z]?)\n([^=]+)/m){|c, option, t| TEMPLATES[c] = Template.new(t, option)}

  def self.display(string, size=1)
    output = ""
    input = string.split(//)
    Template.height(size).times do |i|
      line = []
      input.each do |character|
        line << TEMPLATES[character].display(i, size)
      end
      output << "#{line.join(" " * size)}\n"
    end
    output
  end
end

if(__FILE__ == $0)
  require 'optparse'

  size = 1
  ARGV.options do |o|
    o.on("-sSIZE", "--size", Integer){|size|}
  end.parse!
  puts LCD::display(ARGV.first, size)
end

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