Add bin and edit workflow

bin/gems/pdf-reader-2.14.1/lib/pdf/reader/resources.rb

@@ -0,0 +1,101 @@
+# coding: utf-8
+# typed: strict
+# frozen_string_literal: true
+
+module PDF
+  class Reader
+
+    # mixin for common methods in Page and FormXobjects
+    #
+    class Resources
+
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      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.
+      #
+      def xobjects
+        dict = @objects.deref_hash!(@resources[:XObject]) || {}
+        TypeCheck.cast_to_pdf_dict_with_stream_values!(dict)
+      end
+
+    end
+  end
+end