lib/hexapdf/parser.rb in hexapdf-0.27.0 vs lib/hexapdf/parser.rb in hexapdf-0.28.0

@@ -68,9 +68,22 @@
     # Returns +true+ if the PDF file was damaged and could be reconstructed.
     def reconstructed?
       !@reconstructed_revision.nil?
     end
 
+    # Returns +true+ if the PDF file is a linearized file.
+    def linearized?
+      @linearized ||=
+        begin
+          @tokenizer.pos = @header_offset
+          3.times { @tokenizer.next_token } # parse: oid gen obj
+          obj = @tokenizer.next_object
+          obj.kind_of?(Hash) && obj.key?(:Linearized)
+        rescue MalformedPDFError
+          false
+        end
+    end
+
     # Loads the indirect (potentially compressed) object specified by the given cross-reference
     # entry.
     #
     # For information about the +xref_entry+ argument, have a look at HexaPDF::XRefSection and
     # HexaPDF::XRefSection::Entry.