Added switch to dis/allow rotation of boxes within the bin

.travis.yml

@@ -3,7 +3,9 @@ before_install:
   - rm Gemfile.lock
 rvm:
   - 1.9.3
-  - 2.2.0
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.5
   - jruby-19mode
-  - rbx-2
 script: bundle exec rspec spec

lib/bin_packing/box.rb

@@ -1,27 +1,28 @@
 module BinPacking
   class Box
-    attr_accessor :width, :height, :x, :y, :packed
+    attr_accessor :width, :height, :x, :y, :packed, :can_rotate
 
     def initialize(width, height)
       @width = width
       @height = height
       @x = 0
       @y = 0
       @packed = false
+      @can_rotate = true
     end
 
     def area
       @area ||= @width * @height
     end
 
-    def rotate
-      @width, @height = [@height, @width]
-    end
-
     def packed?
       @packed
     end
 
+    def can_rotate?
+      @can_rotate
+    end
+
     def label
       "#{@width}x#{@height} at [#{@x},#{@y}]"
     end

lib/bin_packing/heuristics/base.rb

@@ -8,7 +8,10 @@ def find_position_for_new_node!(box, free_rectangles)
 
         free_rectangles.each do |free_rect|
           try_place_rect_in(free_rect, box, width, height, best_score)
-          try_place_rect_in(free_rect, box, height, width, best_score)
+
+          if box.can_rotate?
+            try_place_rect_in(free_rect, box, height, width, best_score)
+          end
         end
 
         best_score

spec/bin_packing/packer_spec.rb

@@ -112,6 +112,26 @@
       expect(packer.pack([box]).size).to be 1
       expect(packer.pack([box]).size).to be 0
     end
+
+    it 'respects the can_rotate property' do
+      bin = bin_of_size_1
+      box = BinPacking::Box.new(1_000, 9_000)
+      box.can_rotate = false
+      packer = BinPacking::Packer.new([bin])
+      expect(packer.pack([box]).size).to be 0
+      expect(bin.boxes.size).to be 0
+      expect(box.width).to be 1_000
+      expect(box.height).to be 9_000
+      expect(box.packed?).to be false
+
+      bin = bin_of_size_1
+      box = BinPacking::Box.new(1_000, 9_000)
+      box.can_rotate = true
+      packer = BinPacking::Packer.new([bin])
+      expect(packer.pack([box]).size).to be 1
+      expect(bin.boxes.size).to be 1
+      expect(box.packed?).to be true
+    end
   end
 
   describe '#pack!' do