Description: define Prawn::DATADIR as the name of the directory containing data
 Upstream hardcoded the relative path with respect to prawn/core.rb of the
 directory containing data.
 A new constant, Prawn::DATADIR is introduced to permit using another
 directory, and change its name just once.
 The code (mainly comments and specs) is patched to make use of this new
 constant instead of the hardcoded path
Author: Cédric Boutillier <cedric.boutillier@gmail.com>
Last-Update: 2011-11-15
Bug: https://github.com/sandal/prawn/pull/299

--- a/lib/prawn/document.rb
+++ b/lib/prawn/document.rb
@@ -166,7 +166,7 @@
     #   pdf = Prawn::Document.new(:page_size => [200, 300])
     #
     #   # New document, with background
-    #   pdf = Prawn::Document.new(:background => "#{Prawn::BASEDIR}/data/images/pigs.jpg")
+    #   pdf = Prawn::Document.new(:background => "#{Prawn::DATADIR}/images/pigs.jpg")
     #
     def initialize(options={},&block)
       options = options.dup
--- a/lib/prawn/images.rb
+++ b/lib/prawn/images.rb
@@ -32,10 +32,10 @@
     # <tt>:fit</tt>:: scale the dimensions of the image proportionally to fit inside [width,height]
     # 
     #   Prawn::Document.generate("image2.pdf", :page_layout => :landscape) do     
-    #     pigs = "#{Prawn::BASEDIR}/data/images/pigs.jpg" 
+    #     pigs = "#{Prawn::DATADIR}/images/pigs.jpg" 
     #     image pigs, :at => [50,450], :width => 450                                      
     #
-    #     dice = "#{Prawn::BASEDIR}/data/images/dice.png"
+    #     dice = "#{Prawn::DATADIR}/images/dice.png"
     #     image dice, :at => [50, 450], :scale => 0.75 
     #   end   
     #
--- a/lib/prawn/core/text.rb
+++ b/lib/prawn/core/text.rb
@@ -131,11 +131,11 @@
       #
       # Call with an empty array to turn off fallback fonts
       #
-      # file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+      # file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
       # font_families["Kai"] = {
       #   :normal => { :file => file, :font => "Kai" }
       # }
-      # file = "#{Prawn::BASEDIR}/data/fonts/Action Man.dfont"
+      # file = "#{Prawn::DATADIR}/fonts/Action Man.dfont"
       # font_families["Action Man"] = {
       #   :normal      => { :file => file, :font => "ActionMan" },
       # }
--- a/lib/prawn/font/afm.rb
+++ b/lib/prawn/font/afm.rb
@@ -28,7 +28,7 @@
             ".", "/usr/lib/afm",
             "/usr/local/lib/afm",
             "/usr/openwin/lib/fonts/afm/",
-             Prawn::BASEDIR+'/data/fonts/']
+             Prawn::DATADIR+'/fonts/']
         end
       end
 
--- a/spec/template_spec.rb
+++ b/spec/template_spec.rb
@@ -59,7 +59,7 @@
   end
     
   it "should have a single page object if importing a single page template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
     output = StringIO.new(@pdf.render)
@@ -71,7 +71,7 @@
   end
 
   it "should have two content streams if importing a single page template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
     output = StringIO.new(@pdf.render)
@@ -83,7 +83,7 @@
   end
 
   it "should not die if using this PDF as a template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/complex_template.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/complex_template.pdf"
 
     assert_nothing_raised do
       @pdf = Prawn::Document.new(:template => filename)
@@ -92,7 +92,7 @@
 
 
   it "should have balance q/Q operators on all content streams" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
     output = StringIO.new(@pdf.render)
@@ -108,7 +108,7 @@
   end
 
   it "should allow text to be added to a single page template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
 
@@ -119,7 +119,7 @@
   end
 
   it "should allow PDFs with page resources behind an indirect object to be used as templates" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/resources_as_indirect_object.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/resources_as_indirect_object.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
 
@@ -131,7 +131,7 @@
   end
 
   it "should copy the PDF version from the template file" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/version_1_6.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/version_1_6.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
     str = @pdf.render
@@ -139,9 +139,9 @@
   end
 
   it "should correctly add a TTF font to a template that has existing fonts" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/contains_ttf_font.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/contains_ttf_font.pdf"
     @pdf = Prawn::Document.new(:template => filename)
-    @pdf.font "#{Prawn::BASEDIR}/data/fonts/Chalkboard.ttf"
+    @pdf.font "#{Prawn::DATADIR}/fonts/Chalkboard.ttf"
     @pdf.move_down(40)
     @pdf.text "Hi There"
 
@@ -155,7 +155,7 @@
   end
 
   it "should correctly import a template file that is missing a MediaBox entry" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/page_without_mediabox.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/page_without_mediabox.pdf"
 
     @pdf = Prawn::Document.new(:template => filename)
     str = @pdf.render
@@ -215,7 +215,7 @@
   end
   
   it "should have two content streams if importing a single page template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
     @pdf = Prawn::Document.new()
     @pdf.start_new_page(:template => filename)
     output = StringIO.new(@pdf.render)
@@ -226,7 +226,7 @@
   end
   
   it "should have balance q/Q operators on all content streams" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
 
     @pdf = Prawn::Document.new()
     @pdf.start_new_page(:template => filename)
@@ -254,7 +254,7 @@
   end
   
   it "should allow PDFs with page resources behind an indirect object to be used as templates" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/resources_as_indirect_object.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/resources_as_indirect_object.pdf"
 
     @pdf = Prawn::Document.new()
     @pdf.start_new_page(:template => filename)
@@ -267,10 +267,10 @@
   end
   
   it "should correctly add a TTF font to a template that has existing fonts" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/contains_ttf_font.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/contains_ttf_font.pdf"
     @pdf = Prawn::Document.new()
     @pdf.start_new_page(:template => filename)
-    @pdf.font "#{Prawn::BASEDIR}/data/fonts/Chalkboard.ttf"
+    @pdf.font "#{Prawn::DATADIR}/fonts/Chalkboard.ttf"
     @pdf.move_down(40)
     @pdf.text "Hi There"
 
@@ -286,7 +286,7 @@
   
   context "using template_page option" do
     it "uses the specified page option" do
-      filename = "#{Prawn::BASEDIR}/data/pdfs/multipage_template.pdf"
+      filename = "#{Prawn::DATADIR}/pdfs/multipage_template.pdf"
       @pdf = Prawn::Document.new()
       @pdf.start_new_page(:template => filename, :template_page => 2)
       text = PDF::Inspector::Text.analyze(@pdf.render)
--- a/spec/text_box_spec.rb
+++ b/spec/text_box_spec.rb
@@ -74,7 +74,7 @@
     @pdf.text_direction(:rtl)
     @pdf.text_direction = :rtl
     @pdf.text_direction = :rtl
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf", :size => 16) do
+    @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf", :size => 16) do
       @pdf.text "写个小"
     end
     text = PDF::Inspector::Text.analyze(@pdf.render)
@@ -617,7 +617,7 @@
       :height => bounding_height,
       :document => @pdf
     }
-    file = "#{Prawn::BASEDIR}/data/fonts/Action Man.dfont"
+    file = "#{Prawn::DATADIR}/fonts/Action Man.dfont"
     @pdf.font_families["Action Man"] = {
       :normal      => { :file => file, :font => "ActionMan" },
       :italic      => { :file => file, :font => "ActionMan-Italic" },
@@ -800,7 +800,7 @@
       :height => 162.0,
       :document => @pdf
     }
-    @pdf.font "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+    @pdf.font "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
     @options[:overflow] = :truncate
     text_box = Prawn::Text::Box.new(@text, @options)
     text_box.render
--- a/spec/text_at_spec.rb
+++ b/spec/text_at_spec.rb
@@ -107,9 +107,9 @@
         Prawn::Errors::IncompatibleStringEncoding)
     end
     it "should not raise an exception when a shift-jis string is rendered" do
-      datafile = "#{Prawn::BASEDIR}/data/shift_jis_text.txt"
+      datafile = "#{Prawn::DATADIR}/shift_jis_text.txt"
       sjis_str = File.open(datafile, "r:shift_jis") { |f| f.gets }
-      @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+      @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
       lambda { @pdf.draw_text(sjis_str, :at => [0, 0]) }.should.not.raise(
         Prawn::Errors::IncompatibleStringEncoding)
     end
@@ -121,7 +121,7 @@
         Prawn::Errors::IncompatibleStringEncoding)
     end
     it "should raise an exception when a shift-jis string is rendered" do
-      sjis_str = File.read("#{Prawn::BASEDIR}/data/shift_jis_text.txt")
+      sjis_str = File.read("#{Prawn::DATADIR}/shift_jis_text.txt")
       lambda { @pdf.draw_text(sjis_str, :at => [0, 0]) }.should.raise(
         Prawn::Errors::IncompatibleStringEncoding)
     end
--- a/spec/font_spec.rb
+++ b/spec/font_spec.rb
@@ -24,7 +24,7 @@
   it "should exclude newlines" do
     create_pdf
     # Use a TTF font that has a non-zero width for \n
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
 
     @pdf.width_of("\nhello world\n").should ==
       @pdf.width_of("hello world")
@@ -96,7 +96,7 @@
   end
 
   it "should allow font familes to be defined in a single dfont" do
-    file = "#{Prawn::BASEDIR}/data/fonts/Action Man.dfont"
+    file = "#{Prawn::DATADIR}/fonts/Action Man.dfont"
     @pdf.font_families["Action Man"] = {
       :normal      => { :file => file, :font => "ActionMan" },
       :italic      => { :file => file, :font => "ActionMan-Italic" },
@@ -253,15 +253,15 @@
   end
 
   it "should return true when present in a TTF font" do
-    font = @pdf.find_font("#{Prawn::BASEDIR}/data/fonts/Activa.ttf")
+    font = @pdf.find_font("#{Prawn::DATADIR}/fonts/Activa.ttf")
     font.glyph_present?("H").should.be true
   end
 
   it "should return false when absent in a TTF font" do
-    font = @pdf.find_font("#{Prawn::BASEDIR}/data/fonts/Activa.ttf")
+    font = @pdf.find_font("#{Prawn::DATADIR}/fonts/Activa.ttf")
     font.glyph_present?("再").should.be false
 
-    font = @pdf.find_font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+    font = @pdf.find_font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
     font.glyph_present?("€").should.be false
   end
 end
@@ -270,7 +270,7 @@
   
   setup do
     create_pdf
-    @activa = @pdf.find_font "#{Prawn::BASEDIR}/data/fonts/Activa.ttf"
+    @activa = @pdf.find_font "#{Prawn::DATADIR}/fonts/Activa.ttf"
   end
   
   it "should calculate string width taking into account accented characters" do
@@ -336,7 +336,7 @@
     it "should allow TTF fonts to be used alongside document transactions" do
       lambda {
         Prawn::Document.new do
-          font "#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf"
+          font "#{Prawn::DATADIR}/fonts/DejaVuSans.ttf"
           text "Hi there"
           transaction { text "Nice, thank you" }
         end
@@ -346,7 +346,7 @@
     it "should allow TTF fonts to be used inside transactions" do
       pdf = Prawn::Document.new do
         transaction do
-          font "#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf"
+          font "#{Prawn::DATADIR}/fonts/DejaVuSans.ttf"
           text "Hi there"
         end
       end
@@ -364,7 +364,7 @@
 describe "DFont fonts" do
   setup do
     create_pdf
-    @file = "#{Prawn::BASEDIR}/data/fonts/Action Man.dfont"
+    @file = "#{Prawn::DATADIR}/fonts/Action Man.dfont"
   end
 
   it "should list all named fonts" do
@@ -403,7 +403,7 @@
 describe "#character_count(text)" do
   it "should work on TTF fonts" do
     create_pdf
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
     @pdf.font.character_count("こんにちは世界").should == 7
     @pdf.font.character_count("Hello, world!").should == 13
   end
--- a/spec/cell_spec.rb
+++ b/spec/cell_spec.rb
@@ -509,7 +509,7 @@
   describe "with default options" do
     before(:each) do
       @cell = Prawn::Table::Cell.make(@pdf,
-        :image => "#{Prawn::BASEDIR}/data/images/prawn.png")
+        :image => "#{Prawn::DATADIR}/images/prawn.png")
     end
 
     it "should create a Cell::Image" do
@@ -525,7 +525,7 @@
   describe "hash syntax" do
     before(:each) do
       @table = @pdf.make_table([[{
-        :image => "#{Prawn::BASEDIR}/data/images/prawn.png",
+        :image => "#{Prawn::DATADIR}/images/prawn.png",
         :scale => 2,
         :fit => [100, 200],
         :image_width => 123,
--- a/spec/formatted_text_box_spec.rb
+++ b/spec/formatted_text_box_spec.rb
@@ -21,7 +21,7 @@
   it "should not raise Encoding::CompatibilityError when keeping a TTF and an " +
     "AFM font together" do
     ruby_19 do
-      file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+      file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
       @pdf.font_families["Kai"] = {
         :normal => { :file => file, :font => "Kai" }
       }
@@ -121,7 +121,7 @@
   "a Chinese font and set of Chinese glyphs not in the current font" do
   it "should change the font to the Chinese font for the Chinese glyphs" do
     create_pdf
-    file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+    file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
     @pdf.font_families["Kai"] = {
       :normal => { :file => file, :font => "Kai" }
     }
@@ -149,7 +149,7 @@
   "an AFM font and Win-Ansi glyph not in the current Chinese font" do
   it "should change the font to the AFM font for the Win-Ansi glyph" do
     create_pdf
-    file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+    file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
     @pdf.font_families["Kai"] = {
       :normal => { :file => file, :font => "Kai" }
     }
@@ -178,7 +178,7 @@
   "level font" do
   it "should use the fragment level font except for glyphs not in that font" do
     create_pdf
-    file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+    file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
     @pdf.font_families["Kai"] = {
       :normal => { :file => file, :font => "Kai" }
     }
@@ -205,7 +205,7 @@
 describe "Text::Formatted::Box" do
   before(:each) do
     create_pdf
-    file = "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+    file = "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
     @pdf.font_families["Kai"] = {
       :normal => { :file => file, :font => "Kai" }
     }
--- a/spec/text_spacing_spec.rb
+++ b/spec/text_spacing_spec.rb
@@ -42,7 +42,7 @@
   #
   it "should calculate character spacing widths by characters, not bytes" do
     create_pdf
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
 
     str = "こんにちは世界"
     @pdf.character_spacing(0) do
--- a/spec/png_spec.rb
+++ b/spec/png_spec.rb
@@ -12,8 +12,8 @@
 describe "When reading a greyscale PNG file (color type 0)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/web-links.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/web-links.dat"
+    @filename = "#{Prawn::DATADIR}/images/web-links.png"
+    @data_filename = "#{Prawn::DATADIR}/images/web-links.dat"
     @img_data = File.binread(@filename)
   end
 
@@ -39,7 +39,7 @@
 describe "When reading a greyscale PNG file with transparency (color type 0)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/ruport_type0.png"
+    @filename = "#{Prawn::DATADIR}/images/ruport_type0.png"
     @img_data = File.binread(@filename)
   end
 
@@ -56,8 +56,8 @@
 describe "When reading an RGB PNG file (color type 2)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/ruport.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/ruport_data.dat"
+    @filename = "#{Prawn::DATADIR}/images/ruport.png"
+    @data_filename = "#{Prawn::DATADIR}/images/ruport_data.dat"
     @img_data = File.binread(@filename)
   end
 
@@ -83,7 +83,7 @@
 describe "When reading an RGB PNG file with transparency (color type 2)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/arrow2.png"
+    @filename = "#{Prawn::DATADIR}/images/arrow2.png"
     @img_data = File.binread(@filename)
   end
 
@@ -103,8 +103,8 @@
 describe "When reading an indexed color PNG file (color type 3)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/rails.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/rails.dat"
+    @filename = "#{Prawn::DATADIR}/images/rails.png"
+    @data_filename = "#{Prawn::DATADIR}/images/rails.dat"
     @img_data = File.binread(@filename)
   end
 
@@ -130,9 +130,9 @@
 describe "When reading a greyscale+alpha PNG file (color type 4)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/page_white_text.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/page_white_text.dat"
-    @alpha_data_filename = "#{Prawn::BASEDIR}/data/images/page_white_text.alpha"
+    @filename = "#{Prawn::DATADIR}/images/page_white_text.png"
+    @data_filename = "#{Prawn::DATADIR}/images/page_white_text.dat"
+    @alpha_data_filename = "#{Prawn::DATADIR}/images/page_white_text.alpha"
     @img_data = File.binread(@filename)
   end
 
@@ -166,9 +166,9 @@
 describe "When reading an RGB+alpha PNG file (color type 6)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/dice.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/dice.dat"
-    @alpha_data_filename = "#{Prawn::BASEDIR}/data/images/dice.alpha"
+    @filename = "#{Prawn::DATADIR}/images/dice.png"
+    @data_filename = "#{Prawn::DATADIR}/images/dice.dat"
+    @alpha_data_filename = "#{Prawn::DATADIR}/images/dice.alpha"
     @img_data = File.binread(@filename)
   end
 
@@ -202,10 +202,10 @@
 describe "When reading a 16bit RGB+alpha PNG file (color type 6)" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/16bit.png"
-    @data_filename = "#{Prawn::BASEDIR}/data/images/16bit.dat"
+    @filename = "#{Prawn::DATADIR}/images/16bit.png"
+    @data_filename = "#{Prawn::DATADIR}/images/16bit.dat"
     # alpha channel truncated to 8-bit
-    @alpha_data_filename = "#{Prawn::BASEDIR}/data/images/16bit.alpha"
+    @alpha_data_filename = "#{Prawn::DATADIR}/images/16bit.alpha"
     @img_data = File.binread(@filename)
   end
 
--- a/spec/object_store_spec.rb
+++ b/spec/object_store_spec.rb
@@ -35,7 +35,7 @@
   end
 
   it "should import all objects from a PDF that has an indirect reference in a stream dict" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/indirect_reference.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/indirect_reference.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.size.should == 8
   end
@@ -47,13 +47,13 @@
   end
 
   it "should raise Prawn::Errors::TemplateError when given a non PDF as a template" do
-    filename = "#{Prawn::BASEDIR}/data/images/dice.png"
+    filename = "#{Prawn::DATADIR}/images/dice.png"
 
     lambda { Prawn::Core::ObjectStore.new(:template => filename) }.should.raise(Prawn::Errors::TemplateError)
   end
 
   it "should raise Prawn::Errors::TemplateError when given an encrypted PDF as a template" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/encrypted.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/encrypted.pdf"
 
     lambda { Prawn::Core::ObjectStore.new(:template => filename) }.should.raise(Prawn::Errors::TemplateError)
   end
@@ -118,37 +118,37 @@
 
 describe "Prawn::ObjectStorie#object_id_for_page" do
   it "should return the object ID of an imported template page" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(0).should == 4
   end
 
   it "should return the object ID of the first imported template page" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/two_hexagons.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/two_hexagons.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(1).should == 4
   end
 
   it "should return the object ID of the last imported template page" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/two_hexagons.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/two_hexagons.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(-1).should == 6
   end
 
   it "should return the object ID of the first page of a template that uses nested Pages" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/nested_pages.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/nested_pages.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(1).should == 5
   end
 
   it "should return the object ID of the last page of a template that uses nested Pages" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/nested_pages.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/nested_pages.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(-1).should == 8
   end
 
   it "should return nil if given an invalid page number" do
-    filename = "#{Prawn::BASEDIR}/data/pdfs/hexagon.pdf"
+    filename = "#{Prawn::DATADIR}/pdfs/hexagon.pdf"
     store = Prawn::Core::ObjectStore.new(:template => filename)
     store.object_id_for_page(10).should == nil
   end
--- a/spec/jpg_spec.rb
+++ b/spec/jpg_spec.rb
@@ -9,7 +9,7 @@
 describe "When reading a JPEG file" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/pigs.jpg"
+    @filename = "#{Prawn::DATADIR}/images/pigs.jpg"
     @img_data = File.open(@filename, "rb") { |f| f.read }
   end
    
--- a/spec/images_spec.rb
+++ b/spec/images_spec.rb
@@ -7,7 +7,7 @@
 describe "the image() function" do
 
   before(:each) do
-    @filename = "#{Prawn::BASEDIR}/data/images/pigs.jpg" 
+    @filename = "#{Prawn::DATADIR}/images/pigs.jpg" 
     create_pdf
   end
 
@@ -44,17 +44,17 @@
   end
 
   it "should raise an UnsupportedImageType if passed a BMP" do
-    filename = "#{Prawn::BASEDIR}/data/images/tru256.bmp"
+    filename = "#{Prawn::DATADIR}/images/tru256.bmp"
     lambda { @pdf.image filename, :at => [100,100] }.should.raise(Prawn::Errors::UnsupportedImageType)
   end
 
   it "should raise an UnsupportedImageType if passed an interlaced PNG" do
-    filename = "#{Prawn::BASEDIR}/data/images/dice_interlaced.png"
+    filename = "#{Prawn::DATADIR}/images/dice_interlaced.png"
     lambda { @pdf.image filename, :at => [100,100] }.should.raise(Prawn::Errors::UnsupportedImageType)
   end
 
   it "should bump PDF version to 1.5 or greater on embedding 16-bit PNGs" do
-    @pdf.image "#{Prawn::BASEDIR}/data/images/16bit.png"
+    @pdf.image "#{Prawn::DATADIR}/images/16bit.png"
     @pdf.state.version.should >= 1.5
   end
 
@@ -63,7 +63,7 @@
   # or anything. OS X Preview handles those files just fine.
   #
   it "should embed 8-bit alpha channels for 16-bit PNGs" do
-    @pdf.image "#{Prawn::BASEDIR}/data/images/16bit.png"
+    @pdf.image "#{Prawn::DATADIR}/images/16bit.png"
 
     output = @pdf.render
     output.should =~ /\/BitsPerComponent 16/
--- a/spec/line_wrap_spec.rb
+++ b/spec/line_wrap_spec.rb
@@ -51,7 +51,7 @@
   end
 
   it "should break on zero-width space" do
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     array = [{ :text => "hello#{Prawn::Text::ZWSP}world" }]
     @arranger.format_array = array
     string = @line_wrap.wrap_line(:arranger => @arranger,
@@ -61,7 +61,7 @@
   end
 
   it "should not display zero-width space" do
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     array = [{ :text => "hello#{Prawn::Text::ZWSP}world" }]
     @arranger.format_array = array
     string = @line_wrap.wrap_line(:arranger => @arranger,
@@ -116,7 +116,7 @@
     expected.force_encoding("utf-8") if "".respond_to?(:force_encoding)
     string.should == expected
 
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     @line_wrap = Prawn::Core::Text::Formatted::LineWrap.new
 
     string = "hello#{Prawn::Text::SHY}world"
@@ -137,7 +137,7 @@
                                   :document => @pdf)
     string.should == "helloworld"
 
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     @line_wrap = Prawn::Core::Text::Formatted::LineWrap.new
 
     string = "hello#{Prawn::Text::SHY}world"
@@ -166,7 +166,7 @@
                                   :document => @pdf)
     string.should == "hello"
 
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     @line_wrap = Prawn::Core::Text::Formatted::LineWrap.new
     enough_width_for_hello_world = 68
 
@@ -205,7 +205,7 @@
     expected.force_encoding("utf-8") if "".respond_to?(:force_encoding)
     string.should == expected
 
-    @pdf.font("#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf")
+    @pdf.font("#{Prawn::DATADIR}/fonts/DejaVuSans.ttf")
     @line_wrap = Prawn::Core::Text::Formatted::LineWrap.new
 
     string = "hello#{Prawn::Text::SHY}-"
--- a/spec/text_spec.rb
+++ b/spec/text_spec.rb
@@ -259,7 +259,7 @@
   
   it "should not raise an exception when providing Pathname instance as font" do
     lambda {
-      @pdf.font Pathname.new("#{Prawn::BASEDIR}/data/fonts/comicsans.ttf")
+      @pdf.font Pathname.new("#{Prawn::DATADIR}/fonts/comicsans.ttf")
     }.should.not.raise(Prawn::Errors::UnknownFont)
   end
 
@@ -274,7 +274,7 @@
 
   it "should correctly render a utf-8 string when using a TTF font" do
     str = "©" # copyright symbol
-    @pdf.font "#{Prawn::BASEDIR}/data/fonts/DejaVuSans.ttf"
+    @pdf.font "#{Prawn::DATADIR}/fonts/DejaVuSans.ttf"
     @pdf.text str
 
     # grab the text from the rendered PDF and ensure it matches
@@ -315,9 +315,9 @@
         Prawn::Errors::IncompatibleStringEncoding)
     end
     it "should not raise an exception when a shift-jis string is rendered" do
-      datafile = "#{Prawn::BASEDIR}/data/shift_jis_text.txt"
+      datafile = "#{Prawn::DATADIR}/shift_jis_text.txt"
       sjis_str = File.open(datafile, "r:shift_jis") { |f| f.gets }
-      @pdf.font("#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf")
+      @pdf.font("#{Prawn::DATADIR}/fonts/gkai00mp.ttf")
       lambda { @pdf.text sjis_str }.should.not.raise(
         Prawn::Errors::IncompatibleStringEncoding)
     end
@@ -329,7 +329,7 @@
         Prawn::Errors::IncompatibleStringEncoding)
     end
     it "should raise an exception when a shift-jis string is rendered" do
-      sjis_str = File.read("#{Prawn::BASEDIR}/data/shift_jis_text.txt")
+      sjis_str = File.read("#{Prawn::DATADIR}/shift_jis_text.txt")
       lambda { @pdf.text sjis_str }.should.raise(
         Prawn::Errors::IncompatibleStringEncoding)
     end
--- a/spec/document_spec.rb
+++ b/spec/document_spec.rb
@@ -89,7 +89,7 @@
 
   describe "Background template feature" do
     before(:each) do
-      @filename = "#{Prawn::BASEDIR}/data/images/pigs.jpg"
+      @filename = "#{Prawn::DATADIR}/images/pigs.jpg"
       @pdf = Prawn::Document.new(:background => @filename)
     end
     it "should place a background image if it is in options block" do
@@ -235,7 +235,7 @@
     doc_uncompressed = Prawn::Document.new
     doc_compressed   = Prawn::Document.new(:compress => true)
     [doc_compressed, doc_uncompressed].each do |pdf|
-       pdf.font "#{Prawn::BASEDIR}/data/fonts/gkai00mp.ttf"
+       pdf.font "#{Prawn::DATADIR}/fonts/gkai00mp.ttf"
        pdf.text "更可怕的是，同质化竞争对手可以按照URL中后面这个ID来遍历" * 10
     end
 
--- a/lib/prawn/core.rb
+++ b/lib/prawn/core.rb
@@ -17,7 +17,11 @@
                           
   # The base source directory for Prawn as installed on the system
   #
-  BASEDIR = File.expand_path(File.join(dir, '..', '..'))
+  # 
+  BASEDIR = File.expand_path(File.join(dir, '..'))
+  # Definition of a data directory that may be not in BASEDIR/data (Debian patch)
+  # /usr/lib/ruby/vendor_ruby/prawn -> /usr/share/ruby-prawn/
+  DATADIR = File.expand_path(File.join(dir, '..', '..', '..', '..', 'share', 'ruby-prawn'))
 
   # Whe set to true, Prawn will verify hash options to ensure only valid keys
   # are used.  Off by default.
--- a/lib/prawn/encoding.rb
+++ b/lib/prawn/encoding.rb
@@ -84,7 +84,7 @@
       ]    
       
       def initialize
-        @mapping_file = "#{Prawn::BASEDIR}/data/encodings/win_ansi.txt"
+        @mapping_file = "#{Prawn::DATADIR}/encodings/win_ansi.txt"
         load_mapping if self.class.mapping.empty?
       end