Class: ChemScanner::ChemDraw::Graphic

Inherits:
BaseNode
  • Object
show all
Defined in:
lib/chem_scanner/chem_draw/node/graphic.rb

Overview

CDX Graphic parser

Constant Summary collapse

GRAPHIC_BRACKET_TYPE = 
6

Constants included from BaseValue

BaseValue::ARROW_NOGO_CROSS, BaseValue::CDXML_ARROW_TYPE, BaseValue::CDXML_ATOM_EXTERNAL_CONNECTION_TYPE, BaseValue::CDXML_CDX_POINT, BaseValue::CDXML_GRAPHIC_TYPE, BaseValue::CDXML_LINE_TYPE, BaseValue::CDXML_NODE_TYPE, BaseValue::CDXML_ORBITAL_TYPE, BaseValue::CDXML_OVAL_TYPE, BaseValue::TEXT_ATTRIBUTES

Instance Attribute Summary collapse

Attributes inherited from BaseNode

#id, #parser, #parser_type

Instance Method Summary collapse

Methods inherited from BaseNode

#assign_center, #bounding_box, #cdx_read, #cdxml_read, #center_x, #center_y, #get_tempid, #pre_parse_node, #read, #set_cdx, #set_cdxml

Methods included from BaseValue

#binary_chunks, #cdx_styles, #cdx_text, #cdxml_text, #do_unhandled, #point_2d, #point_3d, #polygon_from_bb, #read_bounding_box, #read_ids, #read_int, #read_type, #read_value

Constructor Details

#initialize(parser, parser_type, id) ⇒ Graphic

Returns a new instance of Graphic.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 12

def initialize(parser, parser_type, id)
  super(parser, parser_type, id)

  @line_type = 0
end

Instance Attribute Details

#arrow_head ⇒ Object (readonly)

Returns the value of attribute arrow_head.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def arrow_head
  @arrow_head
end

#arrow_id ⇒ Object (readonly)

Returns the value of attribute arrow_id.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def arrow_id
  @arrow_id
end

#head ⇒ Object (readonly)

Returns the value of attribute head.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def head
  @head
end

#line_type ⇒ Object (readonly)

Returns the value of attribute line_type.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def line_type
  @line_type
end

#orbital_type ⇒ Object (readonly)

Returns the value of attribute orbital_type.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def orbital_type
  @orbital_type
end

#oval_type ⇒ Object (readonly)

Returns the value of attribute oval_type.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def oval_type
  @oval_type
end

#polygon ⇒ Object (readonly)

Returns the value of attribute polygon.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def polygon
  @polygon
end

#tail ⇒ Object (readonly)

Returns the value of attribute tail.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def tail
  @tail
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 7

def type
  @type
end

Instance Method Details

#build_orbital_polygon ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 59

def build_orbital_polygon
  return unless @orbital_type == 256 && @oval_type == 3

  p1 = Geometry::Point.new(@left, @bottom)
  p2 = Geometry::Point.new(@left, @top)
  p3 = Geometry::Point.new(@right, @top)
  p4 = Geometry::Point.new(@right, @bottom)

  @polygon = Geometry::Polygon.new([p1, p2, p3, p4])
end

#cross? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 89

def cross?
  false
end

#line ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 85

def line
  segment.to_line
end

#line? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 70

def line?
  @type == 1 && @arrow_id.nil? && (@arrow_head.nil? || @arrow_head.zero?)
end

#parse_node(tag, _id, data) ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 18

def parse_node(tag, _id, data)
  case @props_ref[tag]
  when "Arrow_Type"
    @arrow_head = read_type(tag, data, CDXML_ARROW_TYPE)
  when "Line_Type"
    @line_type = read_type(tag, data, CDXML_LINE_TYPE)
  when "Graphic_Type"
    @type = read_type(tag, data, CDXML_GRAPHIC_TYPE)
  # Graphic objects are the only objects whose kCDXProp_BoundingBox
  # property has a special meaning, representing a pair of points
  # rather than a rectangle.
  when "BoundingBox" then @polygon = read_value(tag, data)
  when "SupersededBy" then @arrow_id = read_value(tag, data)
  when "3DMajorAxisEnd" then @right, @top = read_value(tag, data)
  when "3DMinorAxisEnd" then @left, @bottom = read_value(tag, data)
  when "Orbital_Type"
    @orbital_type = read_type(tag, data, CDXML_ORBITAL_TYPE)
  when "Oval_Type"
    @oval_type = read_type(tag, data, CDXML_OVAL_TYPE)
  else do_unhandled(tag)
  end
end

#post_parse_node ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 41

def post_parse_node
  # When dealing with orbital, boundingbox is not reliable
  build_orbital_polygon if @type == 5

  # In case of Graphic is arrow
  # Treat as arrow if is a line, no "SupersededBy" and has "BoundingBox"
  return unless @type == 1 && @arrow_id.nil? && !@polygon.nil?

  vertices = @polygon.vertices
  # start point ~ head
  sp = vertices[1]
  # end point ~ tail
  ep = vertices[3]

  @head = { x: sp.x, y: sp.y }
  @tail = { x: ep.x, y: ep.y }
end

#segment ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 74

def segment
  Geometry::Segment.new_by_arrays(
    [@tail[:x], @tail[:y]],
    [@head[:x], @head[:y]],
  )
end

#vector ⇒ Object 



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# File 'lib/chem_scanner/chem_draw/node/graphic.rb', line 81

def vector
  segment.to_vector
end