From b4bbf346ea7f124c8614467a0e47bd4062504d63 Mon Sep 17 00:00:00 2001
From: lstrzebinczyk <lukasz.strzebinczyk@ac-project.net>
Date: Sat, 29 Apr 2017 20:16:05 +0200
Subject: Text will use default font

---
 bin/ruby2d         |  1 +
 lib/ruby2d.rb      |  1 +
 lib/ruby2d/font.rb | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/ruby2d/text.rb |  2 +-
 test/testcard.rb   |  3 +++
 test/text_spec.rb  |  7 ++++++-
 6 files changed, 66 insertions(+), 2 deletions(-)
 create mode 100644 lib/ruby2d/font.rb

diff --git a/bin/ruby2d b/bin/ruby2d
index 7437a92..3350898 100755
--- a/bin/ruby2d
+++ b/bin/ruby2d
@@ -27,6 +27,7 @@ end
   'triangle',
   'image',
   'sprite',
+  'font',
   'text',
   'sound',
   'music'
diff --git a/lib/ruby2d.rb b/lib/ruby2d.rb
index 1d48ab8..58a69da 100644
--- a/lib/ruby2d.rb
+++ b/lib/ruby2d.rb
@@ -13,6 +13,7 @@ require 'ruby2d/square'
 require 'ruby2d/triangle'
 require 'ruby2d/image'
 require 'ruby2d/sprite'
+require 'ruby2d/font'
 require 'ruby2d/text'
 require 'ruby2d/sound'
 require 'ruby2d/music'
diff --git a/lib/ruby2d/font.rb b/lib/ruby2d/font.rb
new file mode 100644
index 0000000..0459c30
--- /dev/null
+++ b/lib/ruby2d/font.rb
@@ -0,0 +1,54 @@
+# Ruby2D::Font
+
+module Ruby2D
+  class Font
+
+    class << self
+
+      # List all fonts, names only
+      def all
+        all_paths.map { |path| path.split('/').last.chomp('.ttf').downcase }.uniq.sort
+      end
+
+      # Find a font file path from its name
+      def path(font_name)
+        all_paths.find { |path| path.downcase.include?(font_name) }
+      end
+
+      # Get all fonts with full file paths
+      def all_paths
+        fonts = `find #{directory} -name *.ttf`.split("\n")
+        fonts = fonts.reject do |f|
+          f.downcase.include?('bold')    ||
+          f.downcase.include?('italic')  ||
+          f.downcase.include?('oblique') ||
+          f.downcase.include?('narrow')  ||
+          f.downcase.include?('black')
+        end
+        fonts.sort_by { |f| f.downcase.chomp '.ttf' }
+      end
+
+      # Get the default font
+      def default
+        if all.include? 'arial'
+          path 'arial'
+        else
+          all_paths.first
+        end
+      end
+
+      # Get the fonts directory for the current platform
+      def directory
+        if `uname`.include? 'Darwin'  # macOS
+            "/Library/Fonts"
+        elsif `uname`.include? 'Linux'
+            "/usr/share/fonts/truetype"
+        elsif `uname`.include? 'MINGW'
+            "C:/Windows/Fonts"
+        end
+      end
+
+    end
+
+  end
+end
diff --git a/lib/ruby2d/text.rb b/lib/ruby2d/text.rb
index 1b2207d..f3f0580 100644
--- a/lib/ruby2d/text.rb
+++ b/lib/ruby2d/text.rb
@@ -14,7 +14,7 @@ module Ruby2D
       @text = (opts[:text] || "Hello Ruby!").to_s
       @size = opts[:size] || 20
       @rotate = opts[:rotate] || 0
-      @font = opts[:font]
+      @font = opts[:font] || Font.default
 
       unless RUBY_ENGINE == 'opal'
         unless File.exists? @font
diff --git a/test/testcard.rb b/test/testcard.rb
index c433aa4..2b182cf 100644
--- a/test/testcard.rb
+++ b/test/testcard.rb
@@ -243,6 +243,9 @@ flash = 0
 
 time_start = Time.now
 
+# Default font for text
+Text.new(x: 150, y: 470, text: "Default font", size: 20)
+
 # Text size
 created_text = Text.new(x: 10, y: 270, text: "Created text", font: font)
 created_text_background = Rectangle.new(
diff --git a/test/text_spec.rb b/test/text_spec.rb
index 9a79532..67afe0e 100644
--- a/test/text_spec.rb
+++ b/test/text_spec.rb
@@ -6,10 +6,15 @@ RSpec.describe Ruby2D::Text do
     it "raises exception if font file doesn't exist" do
       expect { Text.new(font: "bad_font.ttf") }.to raise_error(Ruby2D::Error)
     end
+
+    it "uses the system default font if one is not provided" do
+      t = Text.new
+      expect(t.font).to eq(Font.default)
+    end
   end
 
   describe "#text=" do
-    it 'maps Time to string' do
+    it "maps Time to string" do
       t = Text.new(font: "test/media/bitstream_vera/vera.ttf")
       t.text = Time.new(1, 1, 1, 1, 1, 1, 1)
       expect(t.text).to eq("0001-01-01 01:01:01 +0000")
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