always show 6 featured add-ons at a time (bug 653306)

apps/discovery/templates/discovery/macros.html

@@ -1,8 +1,8 @@
-{% macro addon_list(list, limit=5, sidebar=False) %}
+{% macro addon_list(list, sidebar=False) %}
 <ul>
 {% set src = 'discovery-upandcoming' if sidebar else 'discovery-featured' %}
 {# These are JSON add-ons from the API, not Addon objects. #}
-{% for addon in list[:limit] %}
+{% for addon in list %}
   <li data-guid="{{ addon.guid }}" data-summary="{{ addon.summary }}">
     <a href="{{ services_url('discovery.addons.detail', addon.id, src=src) }}"
        target="_self" class="addon-title">
@@ -19,9 +19,9 @@
 </ul>
 {% endmacro %}
 
-{% macro persona_list(list, limit=5) %}
+{% macro persona_list(list) %}
 <ul class="persona-list">
-{% for addon in list[:limit] %}
+{% for addon in list[:5] %}
   <li>{{ disco_persona_preview(addon.persona, title=True, src='discovery-featured') }}</li>
 {% endfor %}
 </ul>

apps/discovery/templates/discovery/pane.html

@@ -43,7 +43,7 @@ data-account-url="{{ services_url('discovery.pane_account') }}"
     <section id="featured-addons">
       <h2>{{ _('Featured Add-ons') }}</h2>
       <div class="addons">
-        {{ addon_list(featured_addons, limit=6) }}
+        {{ addon_list(featured_addons) }}
       </div>
     </section>
 
@@ -76,7 +76,7 @@ data-account-url="{{ services_url('discovery.pane_account') }}"
       <section class="featured" id="up-and-coming">
         <h2><a class="all" href="{{ url('browse.extensions') }}">{{ _('See all') }}</a>
           {{ _('Up & Coming') }}</h2>
-        {{ addon_list(top_addons, 5, sidebar=True) }}
+        {{ addon_list(top_addons, sidebar=True) }}
       </section>
     {% endif %}
     {% if featured_personas %}

media/css/zamboni/discovery-pane.css

@@ -684,6 +684,12 @@ ul.addons {
     margin-right: 0;
 }
 
+/* Limit to 6 Featured and 5 Up & Coming add-ons at a time. */
+#featured-addons li:nth-child(n+7),
+#up-and-coming li:nth-child(n+6) {
+    display: none;
+}
+
 .addons li > a,
 .rec-addons li > a,
 #monthly > div,

media/js/zamboni/discovery_pane.js

@@ -74,18 +74,12 @@ function initSidebar() {
 
 function hideInstalled() {
     // Do not show installed extensions in the promo modules or sidebar.
-    $('li[data-guid]').each(function() {
-        var $el = $(this),
-            guid = $el.attr('data-guid');
-        if ($el.siblings().length > 1) {
-            for (key in z.guids) {
-                if (z.guids[key] == guid) {
-                    $el.remove();
-                    break;
-                }
-            }
+    for (key in z.guids) {
+        var $el = $('li[data-guid=' + z.guids[key] + ']');
+        if ($el.length && $el.siblings().length) {
+            $el.remove();
         }
-    });
+    }
 }