Class: DYI::Drawing::Clipping

Inherits:
Element
  • Object
show all
Defined in:
lib/dyi/drawing/clipping.rb

Overview

Since:

  • 0.0.0

Constant Summary collapse

RULES =

Since:

  • 0.0.0

['nonzero', 'evenodd']

Constants inherited from Element

Element::ID_REGEXP

Instance Attribute Summary collapse

Attributes inherited from Element

#description, #title

Instance Method Summary collapse

Methods inherited from Element

#has_uri_reference?, #id, #id=, #include_external_file?, #inner_id

Constructor Details

#initialize(*shapes) ⇒ Clipping

Returns a new instance of Clipping.

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 34

def initialize(*shapes)
  @shapes = shapes
  @rules = Array.new(shapes.size)
end

Instance Attribute Details

#canvas ⇒ Object (readonly)

Since:

  • 1.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 32

def canvas
  @canvas
end

#rule ⇒ Object (readonly)

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 29

def rule
  @rule
end

#shapes ⇒ Object (readonly)

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 29

def shapes
  @shapes
end

Instance Method Details

#add_shape(shape, rule = nil) ⇒ Object

Raises:

  • (ArgumentError)

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 53

def add_shape(shape, rule=nil)
  raise ArgumentError, "\"#{rule}\" is invalid rule" if rule && !RULES.include?(rule)
  unless @shapes.include?(shape)
    @shapes.push(shape)
    @rules.push(rule)
  end
end

#child_elements ⇒ Object

Since:

  • 1.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 40

def child_elements
  @shapes
end

#each_shapes ⇒ Object

:yields: shape, rule

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 69

def each_shapes #:yields: shape, rule
  @shapes.size.times do |i|
    yield @shapes[i], @rules[i]
  end
end

#remove_shape(shape) ⇒ Object

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 61

def remove_shape(shape)
  index = @shapes.each_with_index {|s, i| break i if s == shape}
  if index
    @shapes.delete_at(index)
    @rules.delete_at(index)
  end
end

#set_canvas(canvas) ⇒ Object

Since:

  • 1.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 45

def set_canvas(canvas)
  if @canvas.nil?
    @canvas = canvas
  elsif @canvas != canvas
    raise Arguments, "the clipping is registered to another canvas"
  end
end

#write_as(formatter, io = $>) ⇒ Object

Since:

  • 0.0.0



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# File 'lib/dyi/drawing/clipping.rb', line 75

def write_as(formatter, io=$>)
  formatter.write_clipping(self, io)
end