class PDF::Core::GraphicStateStack
Attributes
stack[RW]
Public Class Methods
new(previous_state = nil)
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# File lib/pdf/core/graphics_state.rb, line 16 def initialize(previous_state = nil) self.stack = [GraphicState.new(previous_state)] end
Public Instance Methods
current_state()
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# File lib/pdf/core/graphics_state.rb, line 32 def current_state stack.last end
empty?()
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# File lib/pdf/core/graphics_state.rb, line 40 def empty? stack.empty? end
present?()
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# File lib/pdf/core/graphics_state.rb, line 36 def present? !stack.empty? end
restore_graphic_state()
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# File lib/pdf/core/graphics_state.rb, line 24 def restore_graphic_state if stack.empty? raise PDF::Core::Errors::EmptyGraphicStateStack, "\n You have reached the end of the graphic state stack" end stack.pop end
save_graphic_state(graphic_state = nil)
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# File lib/pdf/core/graphics_state.rb, line 20 def save_graphic_state(graphic_state = nil) stack.push(GraphicState.new(graphic_state || current_state)) end