Class: Fir::Renderer

Inherits:
Object
  • Object
show all
Includes:
ScreenHelper
Defined in:
lib/fir/renderer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from ScreenHelper

#clear, #cursor_back, #horizontal_absolute, #line_prompt, #next_line, #previous_line

Constructor Details

#initialize(output) ⇒ Renderer

Returns a new instance of Renderer.



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# File 'lib/fir/renderer.rb', line 11

def initialize(output)
  @output = output
  output.syswrite(line_prompt)
end

Instance Attribute Details

#output ⇒ Object (readonly)

Returns the value of attribute output.



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# File 'lib/fir/renderer.rb', line 9

def output
  @output
end

Instance Method Details

#lines_to_render(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 49

def lines_to_render(state)
  if state.executable?
    state.lines[0...-1]
  else
    state.lines
  end
end

#lines_with_prompt(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 42

def lines_with_prompt(state)
  lines_to_render(state).map.with_index do |line, i|
    prompt = state.indents[i].zero? ? '>' : '*'
    [line_prompt(prompt), ('  ' * state.indents[i]), line.join]
  end
end

#perform(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 16

def perform(state)
  output.syswrite(rendered_lines(state))
  output.syswrite(rendered_cursor(state))
  output.syswrite(rendered_suggestion(state)) if state.suggestion
end

#rendered_cursor(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 27

def rendered_cursor(state)
  cursor = ''
  if state.cursor.x != state.current_line.length
    cursor = "#{cursor}#{cursor_back(state.current_line.length - state.cursor.x)}"
  end
  cursor
end

#rendered_lines(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 35

def rendered_lines(state)
  lines_with_prompt(state)
    .map(&:join)
    .join("\n#{horizontal_absolute(1)}")
    .concat(result_prompt(state))
end

#rendered_suggestion(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 22

def rendered_suggestion(state)
  return unless state.suggestion.length.positive?
  "#{state.suggestion}#{cursor_back(state.suggestion.length)}"
end

#result_prompt(state) ⇒ Object 



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# File 'lib/fir/renderer.rb', line 57

def result_prompt(state)
  if state.executable?
    "\n=> "
  else
    ''
  end
end