Allow for override of PDF metadata.

lib/combine_pdf.rb

@@ -18,6 +18,7 @@
 load 'combine_pdf/fonts.rb'
 load 'combine_pdf/filter.rb'
 load 'combine_pdf/parser.rb'
+load 'combine_pdf/pdf_info.rb'
 load 'combine_pdf/pdf_public.rb'
 load 'combine_pdf/pdf_protected.rb'
 load 'combine_pdf/exceptions.rb'

lib/combine_pdf/pdf_info.rb

@@ -0,0 +1,88 @@
+module CombinePDF
+  class PDFInfo
+
+    # if we're passed a date object, return a formatted string
+    # otherwise just use the string we've been passed
+    def self.format_date(new_date)
+      return new_date.strftime "D:%Y%m%d%H%M%S%:::z'00" if new_date.respond_to?(:strftime)
+      new_date
+    end
+  end
+
+  class PDF
+
+    def title
+      self.info[:Title]
+    end
+
+    def title=(new_title = nil)
+      self.info[:Title] = new_title
+    end
+
+    def author
+      self.info[:Author]
+    end
+
+    def author=(new_author = nil)
+      self.info[:Author] = new_author
+    end
+
+    def subject
+      self.info[:Subject]
+    end
+
+    def subject=(new_subject = nil)
+      self.info[:Subject] = new_subject
+    end
+
+    def keywords
+      self.info[:Keywords]
+    end
+
+    def keywords=(new_keywords = nil)
+      self.info[:KeyWords] = new_keywords
+    end
+
+    def creator
+      self.info[:Creator]
+    end
+
+    def creator=(new_creator = nil)
+      self.info[:Creator] = new_creator
+    end
+
+    def producer
+      self.info[:Producer]
+    end
+
+    def producer=(new_producer = nil)
+      self.info[:Producer] = new_producer
+    end
+
+    def creation_date
+      self.info[:CreationDate]
+    end
+
+    def creation_date=(new_creation_date = nil)
+      self.info[:CreationDate] = PDFInfo.format_date(new_creation_date)
+    end
+
+    def mod_date
+      self.info[:ModDate]
+    end
+
+    def mod_date=(new_mod_date = nil)
+      self.info[:ModDate] = PDFInfo.format_date(new_mod_date)
+    end
+
+    def trapped
+      self.info[:Trapped]
+    end
+
+    def trapped=(new_trapped = nil)
+      self.info[:Trapped] = new_trapped
+    end
+
+  end
+
+end

lib/combine_pdf/pdf_public.rb

@@ -109,7 +109,7 @@ def initialize(parser = nil)
 
       # general globals
       @set_start_id = 1
-      @info[:Producer] = "Ruby CombinePDF #{CombinePDF::VERSION} Library"
+      producer = "Ruby CombinePDF #{CombinePDF::VERSION} Library"
       @info.delete :CreationDate
       @info.delete :ModDate
     end
@@ -125,33 +125,6 @@ def new_page(mediabox = [0, 0, 612.0, 792.0], _location = -1)
       p
     end
 
-    # get the title for the pdf
-    # The title is stored in the information dictionary and isn't required
-    def title
-      @info[:Title]
-    end
-
-    # set the title for the pdf
-    # The title is stored in the information dictionary and isn't required
-    # new_title:: a string that is the new author value.
-    def title=(new_title = nil)
-      @info[:Title] = new_title
-    end
-
-    # get the author value for the pdf.
-    # The author is stored in the information dictionary and isn't required
-    def author
-      @info[:Author]
-    end
-
-    # set the author value for the pdf.
-    # The author is stored in the information dictionary and isn't required
-    #
-    # new_title:: a string that is the new author value.
-    def author=(new_author = nil)
-      @info[:Author] = new_author
-    end
-
     # Clears any existing form data.
     def clear_forms_data
       @forms_data.nil? || @forms_data.clear
@@ -174,10 +147,17 @@ def save(file_name, options = {})
     def to_pdf(options = {})
       # reset version if not specified
       @version = 1.5 if @version.to_f == 0.0
+
       # set info for merged file
-      @info[:ModDate] = @info[:CreationDate] = Time.now.strftime "D:%Y%m%d%H%M%S%:::z'00"
-      @info[:Subject] = options[:subject] if options[:subject]
-      @info[:Producer] = options[:producer] if options[:producer]
+      mod_date = Time.now
+
+      # set creation date to mod date if it doesn't already exist
+      creation_date ||= mod_date
+
+      # legacy behavior... assign subject and producer to metadata
+      subject = options[:subject] if options[:subject]
+      producer = options[:producer] if options[:producer]
+
       # rebuild_catalog
       catalog = rebuild_catalog_and_objects
       # add ID and generation numbers to objects