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# Postscript wrapper class
class RGhost::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
def initialize(body = "", &block)
@body = if body.is_a? RGhost::PsObject
body.ps
else
"#{body} "
end
instance_eval(&block) if block
end
# Alias for ps.
def to_s
ps
end
# Gets postscript code.
def ps
@body.to_s
end
# Pushes elements on the stack.
def raw(*value)
@body << "#{value.join(" ")} "
end
# Freezes graphic state
def graphic_scope
"beging #{self} endg "
end
# Sets PsObject into this object.
def set(value)
raise TypeError.new("can't convert #{value.class} into PsObject") unless value.is_a? RGhost::PsObject
@body << "#{value.ps} "
value
end
# Alias for set
def <<(value)
set value
end
# Call operator in the stack
def call(name)
set RGhost::PsObject.new(name)
end
end
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