Compare page improved

* Show new merge request button from compare page
* Show message if user selected same branches
* Show message if compared branches are the same
* Prepend inputs with from/to labels

app/assets/stylesheets/gitlab_bootstrap/forms.scss

@@ -6,10 +6,9 @@ form {
   }
 }
 
-input {
-  &.input-xpadding {
+input.input-xpadding,
+.add-on.input-xpadding {
   padding: 6px 10px;
-  }
 }
 
 .control-group {

app/helpers/compare_helper.rb

+module CompareHelper
+  def compare_to_mr_button?
+    params[:from].present? && params[:to].present? &&
+      @repository.branch_names.include?(params[:from]) &&
+      @repository.branch_names.include?(params[:to]) &&
+      !@refs_are_same
+  end
+
+  def compare_mr_path
+    new_project_merge_request_path(@project, merge_request: {source_branch: params[:from], target_branch: params[:to]})
+  end
+end

app/views/projects/compare/_form.html.haml

-%div
-  - unless params[:to]
-    %p.slead
-      Fill input field with commit id like
-      %code.label-branch 4eedf23
-      or branch/tag name like
-      %code.label-branch master
-      and press compare button for the commits list and a code diff.
-      %br
-      Changes are shown <b>from</b> the version in the first field <b>to</b> the version in the second field.
-
-
-  = form_tag project_compare_index_path(@project), method: :post do
+= form_tag project_compare_index_path(@project), method: :post do
   .clearfix
     .pull-left
       - if params[:to] && params[:from]
         = link_to 'switch', {from: params[:to], to: params[:from]}, {class: 'commits-compare-switch has_tooltip', title: 'Switch base of comparison'}
-        = text_field_tag :from, params[:from], placeholder: "from", class: "input-xlarge input-xpadding"
+      .input-prepend
+        %span.add-on.input-xpadding from
+        = text_field_tag :from, params[:from], class: "span3 input-xpadding"
       = "..."
-        = text_field_tag :to, params[:to], placeholder: "to", class: "input-xlarge input-xpadding"
+      .input-prepend
+        %span.add-on.input-xpadding to
+        = text_field_tag :to, params[:to], class: "span3 input-xpadding"
     .pull-left
       &nbsp;
       = submit_tag "Compare", class: "btn btn-create commits-compare-btn"
-    - if @refs_are_same
-      .alert
-        %span Refs are the same
-
+      - if compare_to_mr_button?
+        = link_to compare_mr_path, class: 'prepend-left-10' do
+          %strong Make a merge request
 
 
 :javascript

app/views/projects/compare/index.html.haml

@@ -2,5 +2,15 @@
 
 %h3.page-title
   Compare View
+%p.slead
+  Compare branches, tags or commit ranges.
+  %br
+  Fill input field with commit id like
+  %code.label-branch 4eedf23
+  or branch/tag name like
+  %code.label-branch master
+  and press compare button for the commits list and a code diff.
+  %br
+  Changes are shown <b>from</b> the version in the first field <b>to</b> the version in the second field.
 
 = render "form"

app/views/projects/compare/show.html.haml

@@ -20,3 +20,16 @@
   - unless @diffs.empty?
     %h4 Diff
     = render "projects/commits/diffs", diffs: @diffs, project: @project
+- else
+  .light-well
+    %center
+      %h4
+        There isn't anything to compare.
+      %p.slead
+        - if params[:to] == params[:from]
+          You'll need to use different branch names to get a valid comparison.
+        - else
+          %span.label-branch #{params[:from]}
+          and
+          %span.label-branch #{params[:to]}
+          are the same.

app/views/projects/issues/_form.html.haml

@@ -67,8 +67,8 @@
         event.preventDefault();
       }
     })
-    .bind( "click", function( event ) {
-        $( this ).autocomplete("search", "");
+    .bind("click", function(event) {
+      $(this).autocomplete("search", "");
     })
     .autocomplete({
       minLength: 0,