From e9b60b622f05ffe69b0232a5e142d9f84a000a40 Mon Sep 17 00:00:00 2001
From: John Bintz <john@coswellproductions.com>
Date: Sat, 16 Nov 2013 12:24:18 -0500
Subject: [PATCH] support adding card backs to PnP pdfs and speed up rendering
 by removing hidden layers

---
 bin/svggvs            | 20 +++++++++++++++++++-
 lib/svggvs/file.rb    | 11 ++++++++++-
 lib/svggvs/session.rb |  2 +-
 3 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/bin/svggvs b/bin/svggvs
index 2215eba..3179f5f 100755
--- a/bin/svggvs
+++ b/bin/svggvs
@@ -36,12 +36,18 @@ module SVGGVS
       end
     end
 
+    no_tasks do
+      def tmp_target_for(file)
+        tmp_path.join(Digest::MD5.hexdigest(file.to_s) + '.png')
+      end
+    end
+
     desc "pdf", "Create PDF of card images"
     def pdf
       pngs
 
       trimmed_pngs = @exported_pngs.collect do |png|
-        tmp_target = tmp_path.join(Digest::MD5.hexdigest(png.to_s) + '.png')
+        tmp_target = tmp_target_for(png)
 
         system %{convert #{png} -gravity Center -crop #{context.session.pdf_card_size}+0+0 +repage #{tmp_target}}
 
@@ -60,6 +66,18 @@ module SVGGVS
         tmp_pdf_target
       end
 
+      if context.session.card_back
+        tmp_target = tmp_target_for(context.session.card_back)
+        tmp_pdf_target = tmp_path.join("backs.pdf")
+
+        system %{convert #{context.session.card_back} -gravity Center -crop #{context.session.pdf_card_size}+0+0 +repage #{tmp_target}}
+        system %{montage -density #{context.session.pdf_dpi} -geometry +0+0 #{Array.new(9, tmp_target).join(' ')} #{tmp_pdf_target}}
+
+        pages.length.times do |page|
+          pages << tmp_pdf_target
+        end
+      end
+
       system "gs -dNOPAUSE -sDEVICE=pdfwrite -sOUTPUTFILE=#{context.session.pdf_target} -dBATCH #{pages.join(" ")}"
     end
 
diff --git a/lib/svggvs/file.rb b/lib/svggvs/file.rb
index 4c19ecc..c724274 100644
--- a/lib/svggvs/file.rb
+++ b/lib/svggvs/file.rb
@@ -77,7 +77,16 @@ module SVGGVS
     end
 
     def save(file)
-      ::File.open(file, 'w') { |fh| fh.print doc.to_xml }
+      for_save_doc = doc.dup
+      for_save_doc.css('g[inkscape|label]').each do |group|
+        if (group[:style] || '').include?('display:none')
+          if !(group['inkscape:label'] || '').include?('(protect)')
+            group.remove
+          end
+        end
+      end
+
+      ::File.open(file, 'w') { |fh| fh.print for_save_doc.to_xml }
     end
   end
 end
diff --git a/lib/svggvs/session.rb b/lib/svggvs/session.rb
index 825e4b9..f5bbb53 100644
--- a/lib/svggvs/session.rb
+++ b/lib/svggvs/session.rb
@@ -2,7 +2,7 @@ module SVGGVS
   class Session
     attr_accessor :svg_source, :svg_merged_target, :individual_files_path, :on_card_finished
     attr_accessor :png_files_path, :png_export_width, :pdf_card_size, :pdf_dpi
-    attr_accessor :pdf_target
+    attr_accessor :pdf_target, :card_back
 
     def initialize
       @index = 0