Class: Pecorb::List

Inherits:
Object
  • Object
show all
Includes:
Console
Defined in:
lib/pecorb/list.rb

Constant Summary

Constants included from Console

Console::CSI, Console::DOWN, Console::LEFT, Console::RIGHT, Console::UP

Instance Method Summary collapse

Methods included from Console

#backspace, #black, #blue, #carriage_return, #clear_screen, #clear_to_eol, #clear_to_eos, #cyan, #down, #green, #left, #load_pos, #magenta, #print, #puts, #read_char, #red, #reset_color, #right, #save_pos, #up, #white, #yellow

Constructor Details

#initialize(items, opts = {}) ⇒ List

Returns a new instance of List.



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# File 'lib/pecorb/list.rb', line 9

def initialize(items, opts={})
  raise "Items must be enumerable!" unless items.is_a? Enumerable
  @prompt = opts.fetch(:prompt, "Select an item: ")
  @pager = Pager.new items, IO.console.winsize.first - 2
  @cursor = 0
  @filter_text = ""
end

Instance Method Details

#prompt ⇒ Object 



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# File 'lib/pecorb/list.rb', line 17

def prompt
  init_ui
  while c = read_char
    case c
    when "", "\r"
      break
    when "", ""
      carriage_return
      clear_to_eos
      exit 0
    when ""
      clear_screen
      print @prompt
      @cursor.times { right }
      update_ui
    when "" # Backspace key
      next if @filter_text.empty? || @cursor <= 0
      @filter_text.slice!(@cursor - 1)
      update_ui
      backspace
      @cursor -= 1
    when Console::LEFT
      next unless @cursor > 0
      print c
      @cursor -= 1
    when Console::RIGHT
      next unless @cursor < @filter_text.length
      print c
      @cursor += 1
    when Console::UP, ""
      @pager.up
      update_ui
    when Console::DOWN, "\n" # CTRL-J enters a linefeed char in bash
      @pager.down
      update_ui
    else
      @filter_text.insert(@cursor, c)
      update_ui
      print c
      @cursor += 1
    end
  end

  backspace(@cursor)
  clear_to_eos
  cyan
  puts @pager.selected_item
  reset_color
  @pager.selected_item
end