Add bin and edit workflow

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

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+# coding: utf-8
+# typed: strict
+# frozen_string_literal: true
+
+################################################################################
+#
+# Copyright (C) 2006 Peter J Jones (pjones@pmade.com)
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+################################################################################
+
+class PDF::Reader
+  ################################################################################
+  # An internal PDF::Reader class that represents a stream object from a PDF. Stream
+  # objects have 2 components, a dictionary that describes the content (size,
+  # compression, etc) and a stream of bytes.
+  #
+  class Stream
+    attr_accessor :hash, :data
+
+    ################################################################################
+    # Creates a new stream with the specified dictionary and data. The dictionary
+    # should be a standard ruby hash, the data should be a standard ruby string.
+    def initialize(hash, data)
+      @hash = TypeCheck.cast_to_pdf_dict!(hash)
+      @data = data
+      @udata = nil
+    end
+    ################################################################################
+    # apply this streams filters to its data and return the result.
+    def unfiltered_data
+      return @udata if @udata
+      @udata = data.dup
+
+      if hash.has_key?(:Filter)
+        options = []
+
+        if hash.has_key?(:DecodeParms)
+          if hash[:DecodeParms].is_a?(Hash)
+            options = [hash[:DecodeParms]]
+          else
+            options = hash[:DecodeParms]
+          end
+        end
+
+        Array(hash[:Filter]).each_with_index do |filter, index|
+          @udata = Filter.with(filter, options[index] || {}).filter(@udata)
+        end
+      end
+      @udata
+    end
+  end
+  ################################################################################
+end
+################################################################################