Reduced dom operations.

app/assets/javascripts/app/controllers/ticket_zoom/article_actions.coffee

@@ -1,7 +1,7 @@
 class App.TicketZoomArticleActions extends App.Controller
   events:
-    'click [data-type=public]':   'public_internal'
-    'click [data-type=internal]': 'public_internal'
+    'click [data-type=public]':   'publicInternal'
+    'click [data-type=internal]': 'publicInternal'
     'click [data-type=reply]':    'reply'
     'click [data-type=replyAll]': 'replyAll'
 
@@ -20,8 +20,9 @@ class App.TicketZoomArticleActions extends App.Controller
     else
       @html ''
 
-  public_internal: (e) ->
+  publicInternal: (e) ->
     e.preventDefault()
+    articleContainer = $(e.target).closest('.ticket-article-item')
     article_id = $(e.target).parents('[data-id]').data('id')
 
     # storage update
@@ -35,9 +36,9 @@ class App.TicketZoomArticleActions extends App.Controller
 
     # runntime update
     if internal
-      $(e.target).closest('.ticket-article-item').addClass('is-internal')
+      articleContainer.addClass('is-internal')
     else
-      $(e.target).closest('.ticket-article-item').removeClass('is-internal')
+      articleContainer.removeClass('is-internal')
 
     @render()
 

app/assets/javascripts/app/controllers/ticket_zoom/article_view.coffee

@@ -1,12 +1,16 @@
 class App.TicketZoomArticleView extends App.Controller
   constructor: ->
     super
-
     @article_controller = {}
+    @run()
 
-  execute: (params) ->
+  execute: (params) =>
+    @ticket_article_ids = params.ticket_article_ids
+    @run()
+
+  run: =>
     all = []
-    for ticket_article_id in params.ticket_article_ids
+    for ticket_article_id in @ticket_article_ids
       if !@article_controller[ticket_article_id]
         el = $('<div></div>')
         @article_controller[ticket_article_id] = new ArticleViewItem(
@@ -17,7 +21,7 @@ class App.TicketZoomArticleView extends App.Controller
           highligher:        @highligher
         )
         all.push el
-    @el.append( all )
+    @el.append(all)
 
 class ArticleViewItem extends App.Controller
   hasChangedAttributes: ['from', 'to', 'cc', 'subject', 'body', 'preferences']
@@ -27,15 +31,15 @@ class ArticleViewItem extends App.Controller
     '.textBubble-overflowContainer': 'textBubbleOverflowContainer'
 
   events:
-    'click .show_toogle':          'show_toogle'
-    'click .textBubble':           'toggle_meta_with_delay'
-    'click .textBubble a':         'stopPropagation'
-    'click .js-unfold':            'unfold'
+    'click .textBubble':   'toggleMetaWithDelay'
+    'click .textBubble a': 'stopPropagation'
+    'click .js-unfold':    'unfold'
 
   constructor: ->
     super
 
     @seeMore = false
+    @force = true
 
     @render()
 
@@ -52,7 +56,8 @@ class ArticleViewItem extends App.Controller
 
     # rerender, e. g. on language change
     @bind('ui:rerender', =>
-      @render(undefined, true)
+      @force = true
+      @render(undefined)
     )
 
     # subscribe to changes
@@ -87,10 +92,10 @@ class ArticleViewItem extends App.Controller
     @articleAttributesLastUpdate = articleAttributesLastUpdateCheck
     true
 
-  render: (article, force = false) =>
+  render: (article) =>
 
     # get articles
-    @article = App.TicketArticle.fullLocal( @ticket_article_id )
+    @article = App.TicketArticle.fullLocal(@ticket_article_id)
 
     # set @el attributes
     if !article
@@ -106,9 +111,10 @@ class ArticleViewItem extends App.Controller
         @el.removeClass('is-internal')
 
     # check if rerender is needed
-    if !force && !@hasChanged(@article)
+    if !@force && !@hasChanged(@article)
       @lastArticle = @article.attributes()
       return
+    @force = false
 
     # prepare html body
     if @article.content_type is 'text/html'
@@ -199,32 +205,20 @@ class ArticleViewItem extends App.Controller
     else
       bubbleOvervlowContainer.addClass('hide')
 
-  show_toogle: (e) ->
-    e.stopPropagation()
-    e.preventDefault()
-    #$(e.target).hide()
-    if $(e.target).next('div')[0]
-      if $(e.target).next('div').hasClass('hide')
-        $(e.target).next('div').removeClass('hide')
-        $(e.target).text( App.i18n.translateContent('Fold in') )
-      else
-        $(e.target).text( App.i18n.translateContent('See more') )
-        $(e.target).next('div').addClass('hide')
-
   stopPropagation: (e) ->
     e.stopPropagation()
 
-  toggle_meta_with_delay: (e) =>
+  toggleMetaWithDelay: (e) =>
     # allow double click select
     # by adding a delay to the toggle
 
-    if @lastClick and +new Date - @lastClick < 100
+    if @lastClick and +new Date - @lastClick < 80
       clearTimeout(@toggleMetaTimeout)
     else
-      @toggleMetaTimeout = setTimeout(@toggle_meta, 100, e)
+      @toggleMetaTimeout = setTimeout(@toggleMeta, 80, e)
       @lastClick = +new Date
 
-  toggle_meta: (e) =>
+  toggleMeta: (e) =>
     e.preventDefault()
 
     animSpeed      = 300

app/assets/stylesheets/zammad.scss

@@ -1368,7 +1368,7 @@ textarea,
   box-shadow: none;
   outline: none;
   appearance: none;
-  
+
   &.form-control--small {
     padding: 5px 8px 4px;
     height: 31px;
@@ -2565,12 +2565,6 @@ footer {
   margin: 0;
 }
 
-.show_toogle {
-  font-size: 10px;
-  line-height: 12px;
-  color: #999999;
-}
-
 .well {
   background: white;
   border: 1px solid hsl(240,3%,92%);