Class: Diakonos::InteractionHandler

Inherits:
Object
  • Object
show all
Defined in:
lib/diakonos/interaction-handler.rb

Constant Summary collapse

CHOICE_STRINGS = 
[
  '(n)o',
  '(y)es',
  '(a)ll',
  '(c)ancel',
  'y(e)s to all',
  'n(o) to all',
  'yes and (s)top',
  '(d)elete',
  'all (w)ithin selection',
]
CHOICE_KEYS = 
[
  ["n".ord, "N".ord],
  ["y".ord, "Y".ord],
  ["a".ord, "A".ord],
  ["c".ord, "C".ord, ESCAPE, CTRL_C, CTRL_D, CTRL_Q],
  ["e".ord],
  ["o".ord],
  ["s".ord],
  ["d".ord],
  ["w".ord],
]

Instance Method Summary collapse

Constructor Details

#initialize(win_main:, win_interaction:, cursor_manager:, testing: false, choice_delay: 3, blink_string: "*" * 60, blink_duration: 0.05) ⇒ InteractionHandler

TODO: Move win_interaction creation, etc. into this class.

If necessary, expose it with attr_reader
e.g. for @modes[ 'input' ].window = @win_interaction



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# File 'lib/diakonos/interaction-handler.rb', line 53

def initialize(
  win_main:,
  win_interaction:,
  cursor_manager:,
  testing: false,
  choice_delay: 3,
  blink_string: "*" * 60,
  blink_duration: 0.05
)
  @win_main = win_main
  @win_interaction = win_interaction
  @cursor_manager = cursor_manager
  @testing = testing

  @choice_iterations = 0
  @choice_delay = choice_delay
  @blink_string = blink_string
  @blink_duration = blink_duration
end

Instance Method Details

#get_char(prompt) ⇒ Object 



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# File 'lib/diakonos/interaction-handler.rb', line 93

def get_char(prompt)
  set_iline prompt
  char = @win_main.getch
  set_iline
  char
end

#get_choice(prompt, choices, default = nil) ⇒ Object

choices should be an array of CHOICE_* constants. default is what is returned when Enter is pressed.



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# File 'lib/diakonos/interaction-handler.rb', line 102

def get_choice( prompt, choices, default = nil )
  retval = @iterated_choice
  if retval
    @choice_iterations -= 1
    if @choice_iterations < 1
      @iterated_choice = nil
      $diakonos.do_display = true
    end
    return retval
  end

  @saved_main_x = @win_main.curx
  @saved_main_y = @win_main.cury

  msg = prompt + " "
  choice_strings = choices.collect do |choice|
    CHOICE_STRINGS[ choice ]
  end
  msg << choice_strings.join( ", " )

  if default
    set_iline msg
  else
    show_message msg
  end

  while retval.nil?
    ch = @win_interaction.getch
    if ch
      c = ch.ord
    else
      next
    end

    case c
    when Curses::KEY_NPAGE
      @cursor_manager.page_down
    when Curses::KEY_PPAGE
      @cursor_manager.page_up
    else
      if @message_expiry && Time.now < @message_expiry
        interaction_blink
        show_message msg
      else
        case c
        when ENTER
          retval = default
        when '0'.ord..'9'.ord
          if @choice_iterations < 1
            @choice_iterations = ( c - '0'.ord )
          else
            @choice_iterations = @choice_iterations * 10 + ( c - '0'.ord )
          end
        else
          choices.each do |choice|
            if CHOICE_KEYS[ choice ].include? c
              retval = choice
              break
            end
          end
        end

        if retval.nil?
          interaction_blink( msg )
        end
      end
    end
  end

  terminate_message
  set_iline

  if @choice_iterations > 0
    @choice_iterations -= 1
    @iterated_choice = retval
    $diakonos.do_display = false
  end

  retval
end

#set_iline(string = "") ⇒ Object

Display text on the interaction line.



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# File 'lib/diakonos/interaction-handler.rb', line 74

def set_iline(string = "")
  return 0  if @testing
  return 0  if $diakonos.readline

  @iline = string
  Curses::curs_set 0
  @win_interaction.setpos( 0, 0 )
  @win_interaction.addstr( "%-#{Curses::cols}s" % @iline )
  @win_interaction.refresh
  Curses::curs_set 1
  string.length
end

#set_iline_if_empty(string) ⇒ Object 



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# File 'lib/diakonos/interaction-handler.rb', line 87

def set_iline_if_empty(string)
  if @iline.nil? || @iline.empty?
    set_iline string
  end
end