Allow f.button :submit to accept a block.

Author: lowjoel

CHANGELOG.md

@@ -1,6 +1,8 @@
 ## master
 
 ### enhancements
+  * It allows `submit` buttons to accept blocks. When a block is specified, the submit button will
+    use a \<button> tag instead of an \<input> tag. [@lowjoel](https://github.com/lowjoel)
 
 ### bug fixes
 

README.md

@@ -27,3 +27,10 @@ end
     1. You can still put configuration settings in, but it should no longer be necessary.
 
  4. Restart your development server.
+
+## Features
+
+ 1. It adds the appropriate button styling to all buttons. By default, the `btn` and `btn-default`
+    styles are added to all buttons. Submit buttons get `btn-primary` instead of `btn-default`.
+ 2. It allows `submit` buttons to accept blocks. When a block is specified, the submit button will
+    use a \<button> tag instead of an \<input> tag.

lib/simple_form/bootstrap/form_builders/button.rb

@@ -19,6 +19,24 @@ def button(type, *args, &proc)
 
     super(type, *args, &proc)
   end
+
+  # Creates a submit button.
+  #
+  # This augments the original button implementation to generate a button element
+  # with a submit action when a block is given. Otherwise, it falls back to the
+  # original submit helper.
+  def submit_button(*args, &block)
+    if block_given?
+      options = args.extract_options!.dup
+      options[:type] = :submit
+      options[:name] ||= 'commit'
+      args << options
+      button_button(options, &block)
+    else
+      submit(*args)
+    end
+  end
+
 end
 
 SimpleForm::FormBuilder.class_eval do

spec/simple_form/bootstrap/form_builders/button_spec.rb

@@ -16,10 +16,11 @@ def test
   let(:button_type) { :button }
   let(:button_text) { 'Button!' }
   let(:button_options) { {} }
+  let(:button_block) { nil }
   subject! do
     object = Button.new
     simple_form_for object, url: 'test' do |f|
-      f.button button_type, button_text, button_options
+      f.button button_type, button_text, button_options, &button_block
     end
     render text: output_buffer
   end
@@ -67,5 +68,18 @@ def test
         expect(rendered).to have_tag('input.btn.btn-primary', with: { value: button_text })
       end
     end
+
+    context 'when a block is given' do
+      let(:proc_text) { 'I am in the proc!' }
+      let(:button_block) do
+        proc do
+          proc_text
+        end
+      end
+
+      it 'renders the block' do
+        expect(rendered).to have_tag('button', text: proc_text)
+      end
+    end
   end
 end