1982

Sinclair Spectrum Stuff as a Rubygem

A massively over-engineered solution to a set of problems that I'm almost 100% certain do not exist

• rendering text in the 1982 Sinclair Spectrum character set, in a variety of formats
• serving all of the Spectrum's 15 colours as HTML hex colours
• serving the complete set of Spectrum error messages

Install

git clone https://github.com/pikesley/nineteen-eighty-two
cd nineteen-eighty-two
bundle
rake
rake install

Or just

gem install nineteen-eighty-two

API

Font

From the specs:

Just the data

Transform a string into an array-of-arrays of bits

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  describe Spectrum do
    it 'returns an array of arrays' do
      expect(described_class['ab']).to eq [
        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
        [0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0],
        [0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0],
        [0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0],
        [0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0],
        [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
      ]
    end
  end
end

Specific output formats

HTML table

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  module Formats
    describe HTMLTable do
    it 'makes a table' do
      expect(described_class.format 'a').to eq (
        """<!-- a -->
        <table class='sinclair'>
        <tr><td class='off'> </td><td class='off'> </td><td class='off'> </td><td class='off'> </td><td class='off'> </td><td class='off'> </td><td class='off'> </td><td class='off'> </td></tr>
        <tr><td class='off' colspan='8'> </td></tr>
        <tr><td class='off' colspan='8'> </td></tr>
        <tr><td class='off' colspan='2'> </td><td class='on' colspan='3'> </td><td class='off' colspan='3'> </td></tr>
        <tr><td class='off' colspan='5'> </td><td class='on'> </td><td class='off' colspan='2'> </td></tr>
        <tr><td class='off' colspan='2'> </td><td class='on' colspan='4'> </td><td class='off' colspan='2'> </td></tr>
        <tr><td class='off'> </td><td class='on'> </td><td class='off' colspan='3'> </td><td class='on'> </td><td class='off' colspan='2'> </td></tr>
        <tr><td class='off' colspan='2'> </td><td class='on' colspan='4'> </td><td class='off' colspan='2'> </td></tr>
        <tr><td class='off' colspan='8'> </td></tr>
        </table>"""
      )
    end
  end
end

JSON

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  module Formats
    describe JSON do
      expect(described_class.format 'ab').to eq ({
        :id   => 'ab',
        :data => [
          [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
          [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
          [0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0],
          [0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0],
          [0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0],
          [0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0],
          [0, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0],
          [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
        ]
      }.to_json)
    end
  end
end

SVG

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  module Formats
    describe SVG do
      it 'returns an SVG' do
        expect(described_class.format '/').to eq (
          """<svg viewBox='0 0 8 8' xmlns='http://www.w3.org/2000/svg'>
          <style type='text/css'>
            <![CDATA[
              rect.on {
                fill: #000000;
              }
            ]]>
          </style>
          <g>
      <rect x='6' y='2' width='1' height='1' class='on' />
      <rect x='5' y='3' width='1' height='1' class='on' />
      <rect x='4' y='4' width='1' height='1' class='on' />
      <rect x='3' y='5' width='1' height='1' class='on' />
      <rect x='2' y='6' width='1' height='1' class='on' />
          </g>
        </svg>
      """)
      end

      it 'sets the colour' do
            expect(described_class.format '/', {colour: '#fa8100'}).to match /fill: #fa8100;/
      end
    end
  end
end

Text

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  module Formats
    describe Text do
    it 'gives the correct string' do
      expect(described_class.format 'ab').to eq (
        """
        0000000000000000
        0000000000100000
        0011100000100000
        0000010000111100
        0011110000100010
        0100010000100010
        0011110000111100
        0000000000000000
        """
      ).strip
    end

    it 'returns characters other than zeroes and ones' do
      expect(described_class.format 'Sam', {on: 'X', off: '.'}).to eq (
        """
        ........................
        ..XXXX..................
        .X........XXX....XX.X...
        ..XXXX.......X...X.X.X..
        ......X...XXXX...X.X.X..
        .X....X..X...X...X.X.X..
        ..XXXX....XXXX...X.X.X..
        ........................
        """
        ).strip
    end
  end
end

Colours

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  describe Colours do
    it 'knows what red is' do
      expect(described_class['red']).to eq 'bf0000'
    end

    it 'knows how to make magenta' do
      expect(described_class['magenta']).to eq 'bf00bf'
    end

    context 'BRIGHT colours' do
      specify 'primary colours' do
        expect(described_class['GREEN']).to eq '00ff00'
      end
    end

    context 'method-type access' do
      it 'allows method-type access' do
        expect(described_class.blue).to eq '0000bf'
      end
    end
  end
end

Error messages

require 'nineteen/eighty/two'

module Nineteen::Eighty::Two
  describe Messages do
    it 'has error messages' do
      expect(described_class['R']).to eq 'R - Tape loading error'
    end

    it 'supports case-insensitive lookups' do
      expect(described_class['c']).to eq 'C - Nonsense in BASIC'
    end

    it 'is polite about non-existent keys' do
      expect { described_class['Z'] }.to raise_exception do |e|
        expect(e).to be_an Exceptions::SpectrumException
        expect(e.message).to eq 'Q - Parameter error'
      end
    end
  end
end

FAQ

Your questions, answered

Why the stupid module structure?

I realise that Nineteen::Eighty::Two::Formats::HTMLTable.format is a ludicrously long method name, but it turns out if you do bundle gem nineteen-eighty-two, this module hierarchy is what you're presented with, and I actually kind of like it (I did try to call it 1982 but apparently that's not a kosher Gem name)

Why doesn't it output in ${other_format}

If you can think of another format I could support, let me know and I'll have a go. I am also open to PRs, of course

Where can I play with this?

I've wrapped this Gem in a RESTful API over here

Why have you done this?

Have you met me? Also, because I'm moderately obsessed with this font