Class: RGhost::PsObject

Inherits:

Object

• Object
• RGhost::PsObject

Defined in:

lib/rghost/ps_object.rb

Overview

Postscript wrapper class

Direct Known Subclasses

Border, Callback, Circle, Color, Cursor, DSCEntry, Dash, Eps, Font, FontMap, Frame, Function, Graphic, Grid::Base, Grid::Header, HorizontalLine, Image, Line, LineWidth, NewPath, Paper, Point, Polygon, PsFacade, RectangleLink, Scale, ShapeContent, Show, Text, TextArea, TextIn, TextLinkIn, Units::Unit, Variable, VerticalLine, VirtualPages

Instance Method Summary

• #<<(value) ⇒ Object

  Alias for set.

• #call(name) ⇒ Object

  Call operator in the stack.

• #graphic_scope ⇒ Object

  Freezes graphic state.

• #initialize(body = "", &block) ⇒ PsObject constructor

  Creates new instance of PsObject.

• #ps ⇒ Object

  Gets postscript code.

• #raw(*value) ⇒ Object

  Pushes elements on the stack.

• #set(value) ⇒ Object

  Sets PsObject into this object.

• #to_s ⇒ Object

  Alias for ps.

Constructor Details

#initialize(body = "", &block) ⇒ PsObject

Creates new instance of PsObject. Example

PsObject.new("/my_proc { 33 45 2 10 sub mul div} bind def")

Or by block code

PsObject.new do
  set PsObject.new("(A test) show")
  raw "(Other Test in raw) show "
end

# File 'lib/rghost/ps_object.rb', line 11

def initialize(body="",&block)
  @body=if body.is_a? RGhost::PsObject
    body.ps
  else
    "#{body} "
  end
  
  instance_eval(&block) if block
  
end

Instance Method Details

#<<(value) ⇒ Object

Alias for set

# File 'lib/rghost/ps_object.rb', line 45

def <<(value)
  set value
 
end

#call(name) ⇒ Object

Call operator in the stack

# File 'lib/rghost/ps_object.rb', line 51

def call(name)
  set RGhost::PsObject.new(name)
end

#graphic_scope ⇒ Object

Freezes graphic state

# File 'lib/rghost/ps_object.rb', line 34

def graphic_scope
  "beging #{self} endg "
end

#ps ⇒ Object

Gets postscript code.

# File 'lib/rghost/ps_object.rb', line 26

def ps
  @body.to_s
end

#raw(*value) ⇒ Object

Pushes elements on the stack.

# File 'lib/rghost/ps_object.rb', line 30

def raw(*value)
  @body << "#{value.join(' ')} "
end

#set(value) ⇒ Object

Sets PsObject into this object.

Raises:

• (TypeError)

# File 'lib/rghost/ps_object.rb', line 38

def set(value)

  raise TypeError.new("can't convert #{value.class} into PsObject") unless value.is_a? RGhost::PsObject
  @body << "#{value.ps} "
  value
end

#to_s ⇒ Object

Alias for ps.

# File 'lib/rghost/ps_object.rb', line 22

def to_s
  ps
end