From 1e1a2bb73f2819bfbb920cc34573de73badd33ca Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Caina=CC=83=20Costa?= <cainan.costa@gmail.com>
Date: Sun, 11 Sep 2011 23:14:39 -0300
Subject: [PATCH] Add a configuration option to change the class of buttons.
 Closes #318

This changes the default behavior of having a fixed "button" class
on the buttons.
---
 lib/simple_form.rb               | 4 ++++
 lib/simple_form/form_builder.rb  | 2 +-
 test/form_builder/button_test.rb | 7 +++++++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/simple_form.rb b/lib/simple_form.rb
index d3a1ac62..2dfc8d65 100644
--- a/lib/simple_form.rb
+++ b/lib/simple_form.rb
@@ -108,6 +108,10 @@ module SimpleForm
   mattr_accessor :cache_discovery
   @@cache_discovery = !Rails.env.development?
 
+  # Adds a class to each generated button, mostly for compatiblity
+  mattr_accessor :button_class
+  @@button_class = 'button'
+
   ## WRAPPER CONFIGURATION
   @@wrappers = {}
 
diff --git a/lib/simple_form/form_builder.rb b/lib/simple_form/form_builder.rb
index f6d4ee49..2cf2c5fe 100644
--- a/lib/simple_form/form_builder.rb
+++ b/lib/simple_form/form_builder.rb
@@ -193,7 +193,7 @@ module SimpleForm
     #
     def button(type, *args, &block)
       options = args.extract_options!
-      options[:class] = "button #{options[:class]}".strip
+      options[:class] = "#{SimpleForm.button_class} #{options[:class]}".strip
       args << options
       if respond_to?("#{type}_button")
         send("#{type}_button", *args, &block)
diff --git a/test/form_builder/button_test.rb b/test/form_builder/button_test.rb
index becd048c..af8e3534 100644
--- a/test/form_builder/button_test.rb
+++ b/test/form_builder/button_test.rb
@@ -18,4 +18,11 @@ class ButtonTest < ActionView::TestCase
     with_button_for @user, :submit
     assert_select 'form input.button[type=submit][value=Create User]'
   end
+
+  test "builder should use the default class from the configuration" do
+    swap SimpleForm, :button_class => 'btn' do
+      with_button_for :post, :submit
+      assert_select 'form input.btn[type=submit][value=Save Post]'
+    end
+  end
 end