Class: RailroadDiagrams::Start

Inherits:
DiagramItem show all
Defined in:
lib/railroad_diagrams/start.rb

Instance Attribute Summary

Attributes inherited from DiagramItem

#attrs, #children, #down, #height, #needs_space, #up, #width

Instance Method Summary collapse

Methods inherited from DiagramItem

#add, #to_str, #walk, #write_svg

Constructor Details

#initialize(type = 'simple', label: nil) ⇒ Start

Returns a new instance of Start.



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# File 'lib/railroad_diagrams/start.rb', line 5

def initialize(type = 'simple', label: nil)
  super('g')
  @width =
    if label
      [20, (label.length * CHAR_WIDTH) + 10].max
    else
      20
    end
  @up = 10
  @down = 10
  @type = type
  @label = label
end

Instance Method Details

#format(x, y, _width) ⇒ Object 



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# File 'lib/railroad_diagrams/start.rb', line 23

def format(x, y, _width)
  path = Path.new(x, y - 10)
  if @type == 'complex'
    path.down(20).m(0, -10).right(@width).add(self)
  else
    path.down(20).m(10, -20).down(20).m(-10, -10).right(@width).add(self)
  end
  if @label
    DiagramItem.new(
      'text',
      attrs: {
        'x' => x,
        'y' => y - 15,
        'style' => 'text-anchor:start'
      },
      text: @label
    ).add(self)
  end
  self
end

#text_diagram ⇒ Object 



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# File 'lib/railroad_diagrams/start.rb', line 44

def text_diagram
  cross, line, tee_right = TextDiagram.get_parts(%w[cross line tee_right])
  start =
    if @type == 'simple'
      tee_right + cross + line
    else
      tee_right + line
    end

  label_td = TextDiagram.new(0, 0, [])
  if @label
    label_td = TextDiagram.new(0, 0, [@label])
    start = TextDiagram.pad_r(start, label_td.width, line)
  end
  start_td = TextDiagram.new(0, 0, [start])
  label_td.append_below(start_td, [], move_entry: true, move_exit: true)
end

#to_s ⇒ Object 



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# File 'lib/railroad_diagrams/start.rb', line 19

def to_s
  "Start(#{@type}, label=#{@label})"
end