72 lines
3.1 KiB
Ruby
72 lines
3.1 KiB
Ruby
# coding: utf-8
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# typed: strict
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# frozen_string_literal: true
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################################################################################
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#
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# Copyright (C) 2006 Peter J Jones (pjones@pmade.com)
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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################################################################################
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class PDF::Reader
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################################################################################
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# An internal PDF::Reader class that represents an indirect reference to a PDF Object
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class Reference
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attr_reader :id
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attr_reader :gen
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################################################################################
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# Create a new Reference to an object with the specified id and revision number
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def initialize(id, gen)
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@id, @gen = id, gen
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end
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################################################################################
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# returns the current Reference object in an array with a single element
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def to_a
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[self]
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end
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################################################################################
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# returns the ID of this reference. Use with caution, ignores the generation id
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def to_i
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self.id
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end
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################################################################################
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# returns true if the provided object points to the same PDF Object as the
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# current object
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def ==(obj)
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return false unless obj.kind_of?(PDF::Reader::Reference)
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self.hash == obj.hash
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end
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alias :eql? :==
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################################################################################
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# returns a hash based on the PDF::Reference this object points to. Two
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# different Reference objects that point to the same PDF Object will
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# return an identical hash
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def hash
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"#{self.id}:#{self.gen}".hash
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end
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################################################################################
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end
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################################################################################
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end
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################################################################################
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