Class: WhirledPeas::Graphics::PixelGrid

Inherits:
Object
  • Object
show all
Defined in:
lib/whirled_peas/graphics/pixel_grid.rb

Defined Under Namespace

Classes: Pixel

Instance Method Summary collapse

Constructor Details

#initialize(width, height) ⇒ PixelGrid

Returns a new instance of PixelGrid.



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# File 'lib/whirled_peas/graphics/pixel_grid.rb', line 6

def initialize(width, height)
  @pixels = Array.new(height) { Array.new(width) { Pixel.new } }
end

Instance Method Details

#add_stroke(left, top, fstring) ⇒ Object 



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# File 'lib/whirled_peas/graphics/pixel_grid.rb', line 10

def add_stroke(left, top, fstring)
  fstring.each_char.with_index do |char, offset|
    pixels[top][left + offset].char = char
    pixels[top][left + offset].formatting = fstring.formatting
  end
end

#diff(other) ⇒ Object 



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# File 'lib/whirled_peas/graphics/pixel_grid.rb', line 21

def diff(other)
  str = ''
  formatting = nil
  chars = ''
  pixels.each.with_index do |row, row_index|
    row.each.with_index do |pixel, col_index|
      if pixel == other.pixel_at(col_index, row_index)
        if chars != ''
          str += Utils::FormattedString.new(chars, formatting).to_s
          chars = ''
          formatting = nil
        end
      elsif chars == ''
        str += Utils::Ansi.cursor_pos(left: col_index, top: row_index)
        chars = pixel.char
        formatting = pixel.formatting
      elsif formatting != pixel.formatting
        str += Utils::FormattedString.new(chars, formatting).to_s
        chars = pixel.char
        formatting = pixel.formatting
      else
        chars += pixel.char
      end
    end
  end
  if chars != ''
    str += chars
    chars = ''
    formatting = nil
  end
  str
end

#pixel_at(col, row) ⇒ Object 



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# File 'lib/whirled_peas/graphics/pixel_grid.rb', line 17

def pixel_at(col, row)
  pixels[row][col]
end

#to_s ⇒ Object 



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# File 'lib/whirled_peas/graphics/pixel_grid.rb', line 54

def to_s
  str = Utils::Ansi.cursor_pos(left: 0, top: 0) + Utils::Ansi.clear_down
  formatting = nil
  chars = ''
  pixels.each.with_index do |row, row_offset|
    str += Utils::Ansi.cursor_pos(left: 0, top: row_offset) if row_offset > 0
    row.each do |pixel|
      if pixel.formatting != formatting
        str += Utils::FormattedString.new(chars, formatting).to_s if chars != ''
        chars = ''
        formatting = pixel.formatting
      end
      chars << pixel.char
    end
    if chars != ''
      str += Utils::FormattedString.new(chars, formatting).to_s
      chars = ''
    end
  end
  str
end