metadata.rb in hexapdf-0.37.2

- old
+ new

@@ -2,11 +2,11 @@
 #
 #--
 # This file is part of HexaPDF.
 #
 # HexaPDF - A Versatile PDF Creation and Manipulation Library For Ruby
-# Copyright (C) 2014-2023 Thomas Leitner
+# Copyright (C) 2014-2024 Thomas Leitner
 #
 # HexaPDF is free software: you can redistribute it and/or modify it
 # under the terms of the GNU Affero General Public License version 3 as
 # published by the Free Software Foundation with the addition of the
 # following permission added to Section 15 as permitted in Section 7(a):
@@ -108,21 +108,23 @@
     # See: PDF2.0 s14.3, https://www.adobe.com/products/xmp.html
     class Metadata
 
       # Represents a localized XMP string, i.e. as string with an attached language.
       class LocalizedString < String
+
         # The language identifier for the string in RFC3066 format.
         attr_accessor :language
+
       end
 
       # Contains a mapping of predefined prefixes for XMP namespaces for metadata.
       PREDEFINED_NAMESPACES = {
         "rdf" => "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
         "xmp" => "http://ns.adobe.com/xap/1.0/",
         "pdf" => "http://ns.adobe.com/pdf/1.3/",
-        "dc"  => "http://purl.org/dc/elements/1.1/",
-        "x"   => "adobe:ns:meta/",
+        "dc" => "http://purl.org/dc/elements/1.1/",
+        "x" => "adobe:ns:meta/",
       }.freeze
 
       # Contains a mapping of predefined XMP properties to their types, i.e. from namespace to
       # property and then type.
       PREDEFINED_PROPERTIES = {
@@ -141,16 +143,15 @@
           'description' => 'LanguageArray',
           'title' => 'LanguageArray',
         }.freeze,
       }.freeze
 
-
       # Creates a new Metadata object for the given PDF document.
       def initialize(document)
         @document = document
         @namespaces = PREDEFINED_NAMESPACES.dup
-        @properties = PREDEFINED_PROPERTIES.transform_values {|value| value.dup}
+        @properties = PREDEFINED_PROPERTIES.transform_values(&:dup)
         @default_language = document.catalog[:Lang] || 'en'
         @metadata = Hash.new {|h, k| h[k] = {} }
         write_info_dict(true)
         write_metadata_stream(true)
         @document.register_listener(:complete_objects, &method(:write_metadata))
@@ -428,15 +429,15 @@
       end
 
       # Creates an XMP packet with the given payload +data+.
       def xmp_packet(data)
         <<~XMP
-        <?xpacket begin="\u{FEFF}" id="#{SecureRandom.uuid.tr('-', '')}"?>
-        <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
-        #{data}
-        </rdf:RDF>
-        <?xpacket end="r"?>
+          <?xpacket begin="\u{FEFF}" id="#{SecureRandom.uuid.tr('-', '')}"?>
+          <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+          #{data}
+          </rdf:RDF>
+          <?xpacket end="r"?>
         XMP
       end
 
       # Creates an 'rdf:Description' element for all metadata +values+ with the given +ns_prefix+.
       def xmp_description(ns_prefix, values)
@@ -463,12 +464,12 @@
             str << "><rdf:#{el_type}>\n#{value}\n</rdf:#{el_type}></#{ns_prefix}:#{name}>"
           end
           str
         end.join("\n")
         <<~XMP.strip
-        <rdf:Description rdf:about="" xmlns:#{ns_prefix}="#{xmp_escape(namespace(ns_prefix))}">
-        #{values}
-        </rdf:Description>
+          <rdf:Description rdf:about="" xmlns:#{ns_prefix}="#{xmp_escape(namespace(ns_prefix))}">
+          #{values}
+          </rdf:Description>
         XMP
       end
 
       # Escapes the given value so as to be usable as XMP simple value.
       def xmp_escape(value)