Class: Alchemist::Curses::GlyphWindow

Inherits:
Object
  • Object
show all
Includes:
FFI::NCurses
Defined in:
lib/alchemist-server/curses/glyph_window.rb

Constant Summary collapse

ROWS = 
21
COLS = 
48

Instance Method Summary collapse

Constructor Details

#initialize(line, col) ⇒ GlyphWindow

Returns a new instance of GlyphWindow.



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 9

def initialize(line,col)
  @width = (COLS + 2)*2
  @win = newwin ROWS, @width, line, col
  @starting_char = 0
  @cursor_offset = 0
end

Instance Method Details

#characters ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 29

def characters
  Glyphs.strings[range_start..range_end] || []
end

#draw ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 16

def draw
  wmove @win, 0, 0
  wclear @win
  wprintw @win, rows.pad_to_unicode_monospace
  reset_cursor
end

#have_user_select ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 49

def have_user_select
  draw
  wmove @win, 0, 0
  wrefresh @win

  while (c = getch) != KEY_RETURN
    y,x = getyx @win

    case c
    when KEY_ESCAPE
      return nil
    when KEY_LEFT
      @cursor_offset = [@cursor_offset - 1, 0].max
      reset_cursor
    when KEY_RIGHT
      @cursor_offset = [@cursor_offset + 1, (ROWS*COLS)].min
      reset_cursor
    when KEY_UP
      @cursor_offset = [@cursor_offset - COLS, 0].max
      reset_cursor
    when KEY_DOWN
      @cursor_offset = [@cursor_offset + COLS, (ROWS*COLS)].min
      reset_cursor
    when '0'.ord
      @starting_char += ROWS*COLS
      draw
    when '9'.ord
      @starting_char = [@starting_char-ROWS*COLS,0].max
      draw
    end
  end

  characters[@cursor_offset]
ensure
  wclear @win
  wrefresh @win
end

#range_end ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 45

def range_end
  @starting_char + ROWS*COLS
end

#range_start ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 41

def range_start
  @starting_char
end

#reset_cursor ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 23

def reset_cursor
  y,x = @cursor_offset.divmod COLS
  wmove @win, y, x*2
  wrefresh @win
end

#rows ⇒ Object 



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# File 'lib/alchemist-server/curses/glyph_window.rb', line 33

def rows
  characters
  .each_slice(COLS)
  .map { |slice| slice.join('') }
  .join("\n")
  .force_encoding(Encoding::UTF_8)
end