Class: Keisanjaku::Modes::Sandbox

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

Defined Under Namespace

Classes: SandboxResult

Constant Summary collapse

COARSE = 
0.01
FINE = 
0.001
REDRAW_INTERVAL = 
0.1

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width: nil, color: true, output: $stdout, prompt: nil, answer_entry: false, viewport: nil, procedure_plan: nil) ⇒ Sandbox

Returns a new instance of Sandbox.



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# File 'lib/keisanjaku/modes/sandbox.rb', line 17

def initialize(width: nil, color: true, output: $stdout, prompt: nil, answer_entry: false, viewport: nil, procedure_plan: nil)
  @state = RuleState.new(cursor: Scale.fetch("D").position(1.0))
  @target = :slide
  @show_values = true
  @viewport = viewport || TerminalViewport.new(width: width, right_margin: 1, clamp_fixed_width: true)
  @renderer = Renderer.new(color: color)
  @output = output
  @prompt = prompt
  @answer_entry = answer_entry
  @answer = +""
  @actions = []
  @procedure_capture = procedure_plan ? ProcedureCapture.new(procedure_plan) : nil
end

Instance Attribute Details

#actions ⇒ Object (readonly)

Returns the value of attribute actions.



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# File 'lib/keisanjaku/modes/sandbox.rb', line 15

def actions
  @actions
end

#state ⇒ Object (readonly)

Returns the value of attribute state.



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# File 'lib/keisanjaku/modes/sandbox.rb', line 15

def state
  @state
end

#target ⇒ Object (readonly)

Returns the value of attribute target.



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# File 'lib/keisanjaku/modes/sandbox.rb', line 15

def target
  @target
end

Instance Method Details

#handle_key(key) ⇒ Object 



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# File 'lib/keisanjaku/modes/sandbox.rb', line 31

def handle_key(key)
  return handle_answer_key(key) if @answer_entry && answer_key?(key)

  result = case key
  when "q", :ctrl_c
    :quit
  when "h"
    record(:slide_move)
    move_slide(-COARSE)
  when "l"
    record(:slide_move)
    move_slide(COARSE)
  when "H", ","
    record(:slide_move)
    move_slide(-FINE)
  when "L", "."
    record(:slide_move)
    move_slide(FINE)
  when "c", "j", "k"
    record(:select_target)
    @target = target == :slide ? :cursor : :slide
  when :left
    record_selected_move
    move_selected(-COARSE)
  when :right
    record_selected_move
    move_selected(COARSE)
  when :tab
    record(:flip)
    state.flip!
  when "?"
    @show_values = !@show_values
  when "r"
    record(:reset)
    @state = RuleState.new
  end
  capture_procedure unless result == :quit
  result
end

#run(input: $stdin) ⇒ Object 



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# File 'lib/keisanjaku/modes/sandbox.rb', line 71

def run(input: $stdin)
  reader = Input.new(input)
  @viewport.install
  needs_draw = true
  quit = false
  Input.with_raw(input: input, output: @output) do
    loop do
      if needs_draw || @viewport.refresh_needed?
        draw
        needs_draw = false
      end
      key = reader.read_key(timeout: REDRAW_INTERVAL)
      next unless key

      result = handle_key(key)
      quit = result == :quit
      break if quit || result == :done

      needs_draw = true
    end
  end
  SandboxResult.new(actions: actions, answer: @answer.empty? ? nil : @answer, quit: quit)
ensure
  @viewport.restore if @viewport
end