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# coding: utf-8
# typed: strict
# frozen_string_literal: true
module PDF
class Reader
# mixin for common methods in Page and FormXobjects
#
class Resources
#: (PDF::Reader::ObjectHash, Hash[untyped, untyped]) -> void
def initialize(objects, resources)
@objects = objects
@resources = resources
end
# Returns a Hash of color spaces that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def color_spaces
@objects.deref_hash!(@resources[:ColorSpace]) || {}
end
# Returns a Hash of fonts that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def fonts
@objects.deref_hash!(@resources[:Font]) || {}
end
# Returns a Hash of external graphic states that are available to this
# page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def graphic_states
@objects.deref_hash!(@resources[:ExtGState]) || {}
end
# Returns a Hash of patterns that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def patterns
@objects.deref_hash!(@resources[:Pattern]) || {}
end
# Returns an Array of procedure sets that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Array[Symbol]
def procedure_sets
@objects.deref_array!(@resources[:ProcSet]) || []
end
# Returns a Hash of properties sets that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def properties
@objects.deref_hash!(@resources[:Properties]) || {}
end
# Returns a Hash of shadings that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, untyped]
def shadings
@objects.deref_hash!(@resources[:Shading]) || {}
end
# Returns a Hash of XObjects that are available to this page
#
# NOTE: this method de-serialise objects from the underlying PDF
# with no caching. You will want to cache the results instead
# of calling it over and over.
#
#: () -> Hash[Symbol, PDF::Reader::Stream]
def xobjects
dict = @objects.deref_hash!(@resources[:XObject]) || {}
TypeCheck.cast_to_pdf_dict_with_stream_values!(dict)
end
end
end
end
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