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Name	Size	Permission
annotations.rb	1.97 KB	-rw-r--r--
byte_string.rb	247 B	-rw-r--r--
destinations.rb	3.02 KB	-rw-r--r--
document_state.rb	2.39 KB	-rw-r--r--
filter_list.rb	874 B	-rw-r--r--
filters.rb	760 B	-rw-r--r--
graphics_state.rb	2.29 KB	-rw-r--r--
literal_string.rb	573 B	-rw-r--r--
name_tree.rb	4.15 KB	-rw-r--r--
object_store.rb	2.22 KB	-rw-r--r--
outline_item.rb	763 B	-rw-r--r--
outline_root.rb	295 B	-rw-r--r--
page.rb	5.67 KB	-rw-r--r--
page_geometry.rb	3.77 KB	-rw-r--r--
pdf_object.rb	3.58 KB	-rw-r--r--
reference.rb	1.83 KB	-rw-r--r--
renderer.rb	7.81 KB	-rw-r--r--
stream.rb	2.07 KB	-rw-r--r--
text.rb	9.92 KB	-rw-r--r--
utils.rb	207 B	-rw-r--r--

Code Editor : graphics_state.rb

# frozen_string_literal: true

#
# Implements graphics state saving and restoring
#
# Copyright January 2010, Michael Witrant. All Rights Reserved.
#
# This is free software. Please see the LICENSE and COPYING files for details
#

module PDF
  module Core
    class GraphicStateStack
      attr_accessor :stack

def initialize(previous_state = nil)
        self.stack = [GraphicState.new(previous_state)]
      end

def save_graphic_state(graphic_state = nil)
        stack.push(GraphicState.new(graphic_state || current_state))
      end

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

def current_state
        stack.last
      end

def present?
        !stack.empty?
      end

def empty?
        stack.empty?
      end
    end

# NOTE: This class may be a good candidate for a copy-on-write hash.
    class GraphicState
      attr_accessor :color_space, :dash, :cap_style, :join_style, :line_width,
        :fill_color, :stroke_color

def initialize(previous_state = nil)
        if previous_state
          initialize_copy(previous_state)
        else
          @color_space  = {}
          @fill_color   = '000000'
          @stroke_color = '000000'
          @dash         = { dash: nil, space: nil, phase: 0 }
          @cap_style    = :butt
          @join_style   = :miter
          @line_width   = 1
        end
      end

def dash_setting
        return '[] 0 d' unless @dash[:dash]

array = if @dash[:dash].is_a?(Array)
                  @dash[:dash]
                else
                  [@dash[:dash], @dash[:space]]
                end

"[#{PDF::Core.real_params(array)}] "\
          "#{PDF::Core.real(@dash[:phase])} d"
      end

private

def initialize_copy(other)
        # mutable state
        @color_space  = other.color_space.dup
        @fill_color   = other.fill_color.dup
        @stroke_color = other.stroke_color.dup
        @dash         = other.dash.dup

# immutable state that doesn't need to be duped
        @cap_style    = other.cap_style
        @join_style   = other.join_style
        @line_width   = other.line_width
      end
    end
  end
end

${this.title}

Code Editor : graphics_state.rb