Class: Game2048::Render

Inherits:
Object
  • Object
show all
Defined in:
lib/game_2048/render.rb

Overview

Render

Constant Summary collapse

SIZE = 
3
HORIZONTAL = 
"\u2500"
VERTICAL = 
"\u2502"
LEFT_VERTICAL = 
"\u251c"
RIGHT_VERTICAL = 
"\u2524"
TOP_HORIZONTAL = 
"\u252c"
BOTTOM_HORIZONTAL = 
"\u2534"
TOP_LEFT = 
"\u250c"
TOP_RIGHT = 
"\u2510"
BOTTOM_LEFT = 
"\u2514"
BOTTOM_RIGHT = 
"\u2518"
HORIZONTAL_VERTICAL = 
"\u253c"
BORDER_COLOR = 
:yellow
TILE_COLOR = 
:cyan
STATUSBAR_COLOR = 
:blue
STATUSBAR_TEXT_COLOR = 
:white
GAMEOVER_COLOR = 
:red
WIN_COLOR = 
:green
BLANK = 
' '

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(terminal, tiles, **options) ⇒ Render 



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# File 'lib/game_2048/render.rb', line 29

def initialize(terminal, tiles, **options)
  @tiles = tiles
  @terminal = terminal
  @x = @y = 1
  @rows = @cols = 0
  @width = @height = 0
  @size = options.fetch(:size, SIZE)
end

Instance Attribute Details

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/game_2048/render.rb', line 27

def size
  @size
end

Instance Method Details

#align ⇒ Object 



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# File 'lib/game_2048/render.rb', line 168

def align
  rows, cols = @terminal.display_size
  return if rows.nil? || cols.nil?

  @rows = rows
  @cols = cols
  n = Math.sqrt(Tiles::SIZE).to_i
  @width = @size * 2 * n + n + 1
  @height = @size * n + n + 1
  @x = @cols / 2 - @width / 2
  @y = @rows / 2 - @height / 2
end

#draw ⇒ Object 



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# File 'lib/game_2048/render.rb', line 53

def draw
  draw_tiles
  draw_statusbar
  draw_gameover
end

#draw_gameover ⇒ Object 



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# File 'lib/game_2048/render.rb', line 79

def draw_gameover
  y = @y + @height + 1
  return if @rows <= y

  @terminal.move_to(1, y)
  @terminal.write(BLANK * @cols)
  @terminal.reset

  line = String.new
  if @tiles.win?
    line << 'Win!'
  elsif @tiles.game_over?
    line << 'Game over!'
  end
  x = @cols / 2 - line.length / 2 + 1
  @terminal.move_to(x, y)
  @tiles.win? ? @terminal.fg_color(WIN_COLOR) : @terminal.fg_color(GAMEOVER_COLOR)
  @terminal.bold
  @terminal.write(line[0..(@cols - 1)])
  @terminal.reset
end

#draw_statusbar ⇒ Object 



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# File 'lib/game_2048/render.rb', line 59

def draw_statusbar
  line = String.new
  line << "#{@tiles.score} #{VERTICAL} "
  line << "\u2190\u2193\u2191\u2192 Move #{VERTICAL} "
  line << "u Undo #{VERTICAL} "
  line << "r Reset #{VERTICAL} "
  line << "+- Scale #{VERTICAL} "
  line << 'q Quit'
  x = @cols / 2 - line.length / 2 + 1
  return if @cols < line.length

  @terminal.move_to(1, @rows)
  @terminal.bg_color(STATUSBAR_COLOR)
  @terminal.write(BLANK * @cols)
  @terminal.move_to(x, @rows)
  @terminal.fg_color(STATUSBAR_TEXT_COLOR)
  @terminal.write(line[0..(@cols - 1)])
  @terminal.reset
end

#draw_tiles ⇒ Object 



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# File 'lib/game_2048/render.rb', line 101

def draw_tiles
  n = Math.sqrt(Tiles::SIZE).to_i
  return if @cols <= @width || @rows <= @height

  @terminal.move_to(@x, @y)
  @terminal.fg_color(BORDER_COLOR)
  @terminal.write(TOP_LEFT)
  n.times do |i|
    @terminal.write(HORIZONTAL * (@size * 2))
    next if i == n - 1

    @terminal.write(TOP_HORIZONTAL)
  end
  @terminal.write(TOP_RIGHT)

  n.times do |i|
    @size.times do |j|
      @terminal.move_to(@x, @y + i * @size + i + j + 1)
      @terminal.write(VERTICAL)
      n.times do |k|
        @terminal.reset
        @terminal.write(BLANK * (@size * 2))
        @terminal.reset
        next if k == n - 1

        @terminal.fg_color(BORDER_COLOR)
        @terminal.write(VERTICAL)
      end
      @terminal.fg_color(BORDER_COLOR)
      @terminal.write(VERTICAL)
    end
    next if i == n - 1

    @terminal.move_to(@x, @y + i * (@size + 1) + @size + 1)
    @terminal.write(LEFT_VERTICAL)
    n.times do |j|
      @terminal.write(HORIZONTAL * (@size * 2))
      next if j == n - 1

      @terminal.write(HORIZONTAL_VERTICAL)
    end
    @terminal.write(RIGHT_VERTICAL)
  end

  @terminal.move_to(@x, @y + @size * n + n)
  @terminal.write(BOTTOM_LEFT)
  n.times do |i|
    @terminal.write(HORIZONTAL * (@size * 2))
    next if i == n - 1

    @terminal.write(BOTTOM_HORIZONTAL)
  end
  @terminal.write(BOTTOM_RIGHT)
  @terminal.reset

  @terminal.fg_color(TILE_COLOR)
  @terminal.bold
  @tiles.items.each.with_index do |tile, i|
    t = tile.zero? ? '' : tile.to_s
    x = i % n * (@size * 2 + 1) + @size - t.length / 2 + 1
    y = i / n * (@size + 1) + @size / 2 + 1
    @terminal.move_to(@x + x, @y + y)
    @terminal.write(t)
  end
  @terminal.reset
end

#refresh ⇒ Object 



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# File 'lib/game_2048/render.rb', line 47

def refresh
  @terminal.erase_display
  align
  draw
end