From 3ebd5934b3f1e9bd1b2cb4a0aaac4bad3ea74722 Mon Sep 17 00:00:00 2001
From: John Bintz <john@coswellproductions.com>
Date: Thu, 10 Apr 2014 18:29:58 -0400
Subject: [PATCH] Add file injection to help split apart big files without
 needing to prerender individual pieces

---
 README.md             |  2 ++
 lib/svggvs/session.rb |  1 +
 lib/svggvs/target.rb  | 20 ++++++++++++++++++++
 3 files changed, 23 insertions(+)

diff --git a/README.md b/README.md
index f037a80..1c8707b 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,8 @@ unless they have the following names:
 * (protect): The layer will not be deleted if it is hidden. Good for clone sources.
 * (child visible): The layer will be visible if its parent layer is also made visible. Good if you
                    break artwork up into multiple layers (inks, colors, shading, etc.)
+* (inject filename.svg): Include all the layers of another SVG file as child layers of this layer.
+                         Does not copy patterns/gradients yet!
 
 Hiding/showing layers is the way that you make certain card elements appear/disappear on
 different types of cards with with different properties. You can also replace the text in
diff --git a/lib/svggvs/session.rb b/lib/svggvs/session.rb
index 6881a5a..3308b63 100644
--- a/lib/svggvs/session.rb
+++ b/lib/svggvs/session.rb
@@ -66,6 +66,7 @@ module SVGGVS
           end
 
           with_new_target do |target|
+            target.inject!
             target.active_layers = card[:active_layers]
             target.replacements = card[:replacements]
           end
diff --git a/lib/svggvs/target.rb b/lib/svggvs/target.rb
index 66eec2b..212bf35 100644
--- a/lib/svggvs/target.rb
+++ b/lib/svggvs/target.rb
@@ -12,6 +12,26 @@ module SVGGVS
       @target
     end
 
+    def injected_sources
+      @injected_sources ||= {}
+    end
+
+    def inject!
+      css("g[inkscape|groupmode='layer']").each do |layer|
+        if filename = layer['inkscape:label'][/inject (.*\.svg)/, 1]
+          injected_sources[filename] ||= begin
+                                            data = Nokogiri::XML(::File.read(filename))
+
+                                            data.css("svg > g[inkscape|groupmode='layer']")
+                                          end
+
+          injected_sources[filename].each do |additional_layer|
+            layer << additional_layer.to_xml
+          end
+        end
+      end
+    end
+
     def active_layers=(layers)
       css("g[inkscape|groupmode='layer']").each do |layer|
         if layers.include?(layer['inkscape:label'])