Merge branch 'edit-last-comment' into 'master'

Scroll to the last comment I made and edit it.

Pressing up in an empty comment box will edit your last comment. 

Also now when you click edit on a comment it will put the cursor at the end.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/15267

![scrollup](/uploads/b056fdc479d39311f2be412458028a83/scrollup.gif)

See merge request !3757

app/assets/javascripts/notes.js.coffee

@@ -75,6 +75,9 @@ class @Notes
     # when issue status changes, we need to refresh data
     $(document).on "issuable:change", @refresh
 
+    # when a key is clicked on the notes
+    $(document).on "keydown", ".js-note-text", @keydownNoteText
+
   cleanBinding: ->
     $(document).off "ajax:success", ".js-main-target-form"
     $(document).off "ajax:success", ".js-discussion-note-form"
@@ -92,10 +95,19 @@ class @Notes
     $(document).off "click", ".js-note-target-reopen"
     $(document).off "click", ".js-note-target-close"
     $(document).off "click", ".js-note-discard"
+    $(document).off "keydown", ".js-note-text"
 
     $('.note .js-task-list-container').taskList('disable')
     $(document).off 'tasklist:changed', '.note .js-task-list-container'
 
+  keydownNoteText: (e) ->
+    $this = $(this)
+    if $this.val() is '' and e.which is 38 #aka the up key
+      myLastNote = $("li.note[data-author-id='#{gon.current_user_id}'][data-editable]:last")
+      if myLastNote.length
+        myLastNoteEditBtn = myLastNote.find('.js-note-edit')
+        myLastNoteEditBtn.trigger('click', [true, myLastNote])
+
   initRefresh: ->
     clearInterval(Notes.interval)
     Notes.interval = setInterval =>
@@ -343,7 +355,7 @@ class @Notes
   Adds a hidden div with the original content of the note to fill the edit note form with
   if the user cancels
   ###
-  showEditForm: (e) ->
+  showEditForm: (e, scrollTo, myLastNote) ->
     e.preventDefault()
     note = $(this).closest(".note")
     note.addClass "is-editting"
@@ -354,9 +366,27 @@ class @Notes
     # Show the attachment delete link
     note.find(".js-note-attachment-delete").show()
 
-    new GLForm form
+    done = ($noteText) ->
+      # Neat little trick to put the cursor at the end
+      noteTextVal = $noteText.val()
+      $noteText.val('').val(noteTextVal);
 
-    form.find(".js-note-text").focus()
+    new GLForm form
+    if scrollTo? and myLastNote?
+      # scroll to the bottom 
+      # so the open of the last element doesn't make a jump
+      $('html, body').scrollTop($(document).height());
+      $('html, body').animate({
+        scrollTop: myLastNote.offset().top - 150  
+      }, 500, ->
+        $noteText = form.find(".js-note-text")
+        $noteText.focus()
+        done($noteText)
+      );
+    else
+      $noteText = form.find('.js-note-text')
+      $noteText.focus()
+      done($noteText)
 
   ###
   Called in response to clicking the edit note link

app/views/projects/notes/_note.html.haml

-%li.timeline-entry{ id: dom_id(note), class: [dom_class(note), "note-row-#{note.id}", ('system-note' if note.system)] }
+- note_editable = note_editable?(note)
+%li.timeline-entry{ id: dom_id(note), class: [dom_class(note), "note-row-#{note.id}", ('system-note' if note.system)], data: {author_id: note.author.id, editable: note_editable} }
   .timeline-entry-inner
     .timeline-icon
       %a{href: user_path(note.author)}
@@ -15,16 +16,16 @@
           - if access
             %span.note-role
               = access
-          - if note_editable?(note)
+          - if note_editable
             = link_to '#', title: 'Edit comment', class: 'note-action-button js-note-edit' do
               = icon('pencil')
             = link_to namespace_project_note_path(note.project.namespace, note.project, note), title: 'Remove comment', method: :delete, data: { confirm: 'Are you sure you want to remove this comment?' }, remote: true, class: 'note-action-button js-note-delete danger' do
               = icon('trash-o')
-      .note-body{class: note_editable?(note) ? 'js-task-list-container' : ''}
+      .note-body{class: note_editable ? 'js-task-list-container' : ''}
         .note-text
           = preserve do
             = markdown(note.note, pipeline: :note, cache_key: [note, "note"])
-        - if note_editable?(note)
+        - if note_editable
           = render 'projects/notes/edit_form', note: note
       = edited_time_ago_with_tooltip(note, placement: 'bottom', html_class: 'note_edited_ago', include_author: true)