Class: Hackmac::Graph::Display

Inherits:
Object
  • Object
show all
Defined in:
lib/hackmac/graph/display.rb

Defined Under Namespace

Classes: Cell

Constant Summary collapse

ANSI = 
Term::ANSIColor

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(lines, columns) ⇒ Display

Returns a new instance of Display.



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# File 'lib/hackmac/graph/display.rb', line 20

def initialize(lines, columns)
  @lines_range   = 1..lines
  @columns_range = 1..columns
  clear
end

Instance Attribute Details

#x ⇒ Object (readonly)

Returns the value of attribute x.



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# File 'lib/hackmac/graph/display.rb', line 80

def x
  @x
end

#y ⇒ Object (readonly)

Returns the value of attribute y.



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# File 'lib/hackmac/graph/display.rb', line 82

def y
  @y
end

Instance Method Details

#-(old) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 58

def -(old)
  dimensions != old.dimensions and raise ArgumentError,
    "old dimensions #{old.dimensions.inspect} don't match #{dimensions.inspect}"
  result = +''
  each.zip(old.each) do |(my, mx, me), (_, _, old)|
    if me != old
      result << ANSI.move_to(my, mx) << me.to_s
    end
  end
  result
end

#at(y, x) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 104

def at(y, x)
  @lines_range.include?(y) or
    raise ArgumentError, "y #{y} out of lines range #@lines_range"
  @columns_range.include?(x) or
    raise ArgumentError, "x #{x} out of columns range #@columns_range"
  @y, @x = y, x
  self
end

#bottom ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 136

def bottom
  at(lines, x)
end

#centered ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 148

def centered
  at(lines / 2, columns / 2)
end

#clear ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 26

def clear
  @x        = 1
  @y        = 1
  @color    = 15
  @on_color = 0
  @styles   = []
  @cells    =
    Array.new(lines) {
      Array.new(columns) {
        Cell.new(' ', @color, @on_color, @styles)
      }
    }
  reset
end

#color(color) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 160

def color(color)
  @color = attribute!(color)
  self
end

#columns ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 88

def columns
  @columns_range.end
end

#dimensions ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 92

def dimensions
  [ lines, columns ]
end

#each(&block) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 48

def each(&block)
  Enumerator.new do |enum|
    @lines_range.each do |y|
      @columns_range.each do |x|
        enum.yield y, x, @cells[y - 1][x - 1]
      end
    end
  end.each(&block)
end

#get ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 156

def get
  @cells[@y - 1][@x - 1]
end

#inspect ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 76

def inspect
  "#<#{self.class}: #{columns}×#{lines}>"
end

#left ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 140

def left
  at(y, 1)
end

#lines ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 84

def lines
  @lines_range.end
end

#on_color(on_color) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 165

def on_color(on_color)
  @on_color = attribute!(on_color)
  self
end

#put(char) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 113

def put(char)
  char.size == 1 or
    raise ArgumentError, "#{char} is not single character"
  @cells[@y - 1][@x - 1] = Cell.new(char, @color, @on_color, @styles)
  self
end

#reset ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 41

def reset
  @color    = 15
  @on_color = 0
  @styles   = []
  self
end

#right ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 144

def right
  at(y, columns)
end

#styled(*s) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 96

def styled(*s)
  if nope = s.find { !style?(_1) }
    raise ArgumentError, "#{nope} is not a style"
  end
  @styles = s
  self
end

#to_s ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 70

def to_s
  each.inject(ANSI.clear_screen)  do |s, (y, x, c)|
    s << ANSI.move_to(y, x) << c.to_s
  end
end

#top ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 132

def top
  at(1, x)
end

#write(string) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 120

def write(string)
  string.each_char do |char|
    put(char)
    if x < columns - 1
      at(y, x + 1)
    else
      break
    end
  end
  self
end

#write_centered(string) ⇒ Object 



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# File 'lib/hackmac/graph/display.rb', line 152

def write_centered(string)
  at(@y, (columns - string.size) / 2).write(string)
end