Class: Keisanjaku::Modes::Demo

Inherits:
Object
  • Object
show all
Defined in:
lib/keisanjaku/modes/demo.rb

Constant Summary collapse

REDRAW_INTERVAL = 
0.1

Instance Method Summary collapse

Constructor Details

#initialize(expression, width: nil, color: true, animate: true, output: $stdout) ⇒ Demo

Returns a new instance of Demo.



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# File 'lib/keisanjaku/modes/demo.rb', line 11

def initialize(expression, width: nil, color: true, animate: true, output: $stdout)
  @expression = expression
  @width = width
  @viewport = TerminalViewport.new(width: width)
  @renderer = Renderer.new(color: color)
  @animate = animate
  @output = output
end

Instance Method Details

#plan ⇒ Object 



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# File 'lib/keisanjaku/modes/demo.rb', line 20

def plan
  @plan ||= Planner.compile(Parser.parse(@expression), expression: @expression)
end

#run_interactive(input: $stdin) ⇒ Object 



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# File 'lib/keisanjaku/modes/demo.rb', line 35

def run_interactive(input: $stdin)
  engine = Engine.new(plan, animate: @animate)
  reader = Input.new(input)
  auto = false
  speed = 0.35
  next_auto_at = Time.now + speed
  needs_draw = true
  @viewport = TerminalViewport.new(width: @width, right_margin: 1, clamp_fixed_width: true)
  @viewport.install
  Input.with_raw(input: input, output: @output) do
    loop do
      if needs_draw || @viewport.refresh_needed?
        draw(engine)
        needs_draw = false
      end

      key = reader.read_key(timeout: auto ? [speed, REDRAW_INTERVAL].min : REDRAW_INTERVAL)
      if key.nil?
        if auto && Time.now >= next_auto_at
          auto = false unless advance(engine)
          next_auto_at = Time.now + speed
          needs_draw = true
        end
        next
      end

      case key
      when :enter, :space
        advance(engine)
        needs_draw = true
      when "b"
        engine.step_back
        needs_draw = true
      when "a"
        auto = !auto
        next_auto_at = Time.now + speed
        needs_draw = true
      when "1"
        speed = 0.7
        next_auto_at = Time.now + speed
      when "2"
        speed = 0.35
        next_auto_at = Time.now + speed
      when "3"
        speed = 0.15
        next_auto_at = Time.now + speed
      when "q", :ctrl_c
        break
      end
    end
  end
ensure
  @viewport.restore if @viewport
end

#run_noninteractive ⇒ Object 



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# File 'lib/keisanjaku/modes/demo.rb', line 24

def run_noninteractive
  engine = Engine.new(plan, animate: false)
  @output.puts "Expression: #{@expression}"
  plan.steps.each_with_index do |step, index|
    @output.puts "#{index + 1}. #{step.description}"
    engine.step_forward
  end
  @renderer.render(engine.state, width: @viewport.current_width, highlight_scale: plan.read_scale).each { |line| @output.puts line }
  print_summary(engine.summary)
end