Show milestone remaining tooltip in right sidebar.

app/assets/javascripts/milestone_select.js.coffee

@@ -24,11 +24,21 @@ class @MilestoneSelect
 
       if issueUpdateURL
         milestoneLinkTemplate = _.template(
-          '<a href="/<%= namespace %>/<%= path %>/milestones/<%= iid %>"><%= _.escape(title) %></a>'
+          '<a href="/<%= namespace %>/<%= path %>/milestones/<%= iid %>">
+            <span class="has-tooltip" data-container="body" data-original-title="<%= remaining %>">
+              <%= _.escape(title) %>
+            </span>
+          </a>'
         )
 
         milestoneLinkNoneTemplate = '<div class="light">None</div>'
 
+        collapsedSidebarLabelTemplate = _.template(
+          '<span class="has-tooltip" data-container="body" data-original-title="<%= remaining %>" data-placement="left">
+            <%= _.escape(title) %>
+          </span>'
+        )
+
       $dropdown.glDropdown(
         data: (term, callback) ->
           $.ajax(
@@ -122,8 +132,9 @@ class @MilestoneSelect
               if data.milestone?
                 data.milestone.namespace = _this.currentProject.namespace
                 data.milestone.path = _this.currentProject.path
+                data.milestone.remaining = $.timefor data.milestone.due_date
                 $value.html(milestoneLinkTemplate(data.milestone))
-                $sidebarCollapsedValue.find('span').text(data.milestone.title)
+                $sidebarCollapsedValue.find('span').html(collapsedSidebarLabelTemplate(data.milestone))
               else
                 $value.html(milestoneLinkNoneTemplate)
                 $sidebarCollapsedValue.find('span').text('No')

app/helpers/milestones_helper.rb

@@ -54,13 +54,18 @@ module MilestonesHelper
     end
   end
 
-  def milestone_remaining_days(milestone)
+  def milestone_remaining_days(milestone, withContentTag = true)
     if milestone.expired?
-      content_tag(:strong, 'expired')
+      if withContentTag then content_tag(:strong, 'expired') else 'expired' end
     elsif milestone.due_date
       days = milestone.remaining_days
+
+      if withContentTag
         content = content_tag(:strong, days)
         content << " #{'day'.pluralize(days)} remaining"
+      else
+        "#{days} #{'day'.pluralize(days)} remaining"
+      end
     end
   end
 end

app/views/shared/issuable/_sidebar.html.haml

@@ -56,6 +56,7 @@
           = icon('clock-o')
           %span
             - if issuable.milestone
+              %span.has-tooltip{"data-container" => "body", "data-placement" => "left", "data-original-title" => milestone_remaining_days(issuable.milestone, false)}
                 = issuable.milestone.title
             - else
               None
@@ -67,6 +68,7 @@
         .value.bold.hide-collapsed
           - if issuable.milestone
             = link_to namespace_project_milestone_path(@project.namespace, @project, issuable.milestone) do
+              %span.has-tooltip{"data-container" => "body", "data-original-title" => milestone_remaining_days(issuable.milestone, false)}
                 = issuable.milestone.title
           - else
             .light None