From 00341d2ac2bb227e21c2d0b419118abc01d239b3 Mon Sep 17 00:00:00 2001
From: Kohei Suzuki <eagletmt@gmail.com>
Date: Wed, 18 Mar 2015 20:53:57 +0900
Subject: [PATCH] Support coffee filter via tilt

---
 fast_haml.gemspec                        |  1 +
 lib/fast_haml/filter_compilers.rb        |  1 +
 lib/fast_haml/filter_compilers/coffee.rb | 14 +++++++++++++
 spec/render/filters/coffee_spec.rb       | 25 ++++++++++++++++++++++++
 4 files changed, 41 insertions(+)
 create mode 100644 lib/fast_haml/filter_compilers/coffee.rb
 create mode 100644 spec/render/filters/coffee_spec.rb

diff --git a/fast_haml.gemspec b/fast_haml.gemspec
index 266cae0..0c28c93 100644
--- a/fast_haml.gemspec
+++ b/fast_haml.gemspec
@@ -26,6 +26,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "appraisal"
   spec.add_development_dependency "benchmark-ips"
   spec.add_development_dependency "bundler"
+  spec.add_development_dependency "coffee-script"
   spec.add_development_dependency "coveralls"
   spec.add_development_dependency "haml"
   spec.add_development_dependency "rake"
diff --git a/lib/fast_haml/filter_compilers.rb b/lib/fast_haml/filter_compilers.rb
index 5ad5613..64da5f0 100644
--- a/lib/fast_haml/filter_compilers.rb
+++ b/lib/fast_haml/filter_compilers.rb
@@ -29,6 +29,7 @@ def self.find(name)
 end
 
 require 'fast_haml/filter_compilers/cdata'
+require 'fast_haml/filter_compilers/coffee'
 require 'fast_haml/filter_compilers/css'
 require 'fast_haml/filter_compilers/escaped'
 require 'fast_haml/filter_compilers/javascript'
diff --git a/lib/fast_haml/filter_compilers/coffee.rb b/lib/fast_haml/filter_compilers/coffee.rb
new file mode 100644
index 0000000..d9b271a
--- /dev/null
+++ b/lib/fast_haml/filter_compilers/coffee.rb
@@ -0,0 +1,14 @@
+require 'fast_haml/filter_compilers/tilt_base'
+
+module FastHaml
+  module FilterCompilers
+    class Coffee < TiltBase
+      def compile(texts)
+        temple = compile_with_tilt('coffee', texts)
+        [:haml, :tag, 'script', false, [:html, :attrs], [:html, :js, temple]]
+      end
+    end
+
+    register(:coffee, Coffee)
+  end
+end
diff --git a/spec/render/filters/coffee_spec.rb b/spec/render/filters/coffee_spec.rb
new file mode 100644
index 0000000..31670f2
--- /dev/null
+++ b/spec/render/filters/coffee_spec.rb
@@ -0,0 +1,25 @@
+require 'spec_helper'
+
+RSpec.describe 'CoffeeScript filter renderiong', type: :render do
+  it 'renders CoffeeScript filter' do
+    html = render_string(<<HAML)
+:coffee
+  square = (x) -> x * x
+  square(3)
+HAML
+    expect(html).to include('<script>')
+    expect(html).to include('square = function(x)')
+    expect(html).to include('square(3)')
+  end
+
+  it 'parses string interpolation' do
+    html = render_string(<<'HAML')
+:coffee
+  square = (x) -> x * x
+  square(#{1 + 2})
+HAML
+    expect(html).to include('<script>')
+    expect(html).to include('square = function(x)')
+    expect(html).to include('square(3)')
+  end
+end