MDL-40975 ActionMenu: Add support for fillers in primary menus

This is required to maintain horizontal alignment of primary menus in rows.

course/lib.php

@@ -2044,30 +2044,34 @@ function course_get_cm_edit_actions(cm_info $mod, $indent = -1, $sr = null) {
     }
 
     // Groupmode.
-    if ($hasmanageactivities && !$mod->coursegroupmodeforce && plugin_supports('mod', $mod->modname, FEATURE_GROUPS, 0)) {
-        if ($mod->effectivegroupmode == SEPARATEGROUPS) {
-            $nextgroupmode = VISIBLEGROUPS;
-            $grouptitle = $str->groupsseparate;
-            $actionname = 'groupsseparate';
-            $groupimage = 't/groups';
-        } else if ($mod->effectivegroupmode == VISIBLEGROUPS) {
-            $nextgroupmode = NOGROUPS;
-            $grouptitle = $str->groupsvisible;
-            $actionname = 'groupsvisible';
-            $groupimage = 't/groupv';
-        } else {
-            $nextgroupmode = SEPARATEGROUPS;
-            $grouptitle = $str->groupsnone;
-            $actionname = 'groupsnone';
-            $groupimage = 't/groupn';
-        }
+    if ($hasmanageactivities && !$mod->coursegroupmodeforce) {
+        if (plugin_supports('mod', $mod->modname, FEATURE_GROUPS, 0)) {
+            if ($mod->effectivegroupmode == SEPARATEGROUPS) {
+                $nextgroupmode = VISIBLEGROUPS;
+                $grouptitle = $str->groupsseparate;
+                $actionname = 'groupsseparate';
+                $groupimage = 't/groups';
+            } else if ($mod->effectivegroupmode == VISIBLEGROUPS) {
+                $nextgroupmode = NOGROUPS;
+                $grouptitle = $str->groupsvisible;
+                $actionname = 'groupsvisible';
+                $groupimage = 't/groupv';
+            } else {
+                $nextgroupmode = SEPARATEGROUPS;
+                $grouptitle = $str->groupsnone;
+                $actionname = 'groupsnone';
+                $groupimage = 't/groupn';
+            }
 
-        $actions[$actionname] = new action_menu_link_primary(
-            new moodle_url($baseurl, array('id' => $mod->id, 'groupmode' => $nextgroupmode)),
-            new pix_icon($groupimage, $grouptitle, 'moodle', array('class' => 'iconsmall', 'title' => '')),
-            $grouptitle,
-            array('class' => 'editing_'. $actionname, 'data-action' => $actionname, 'data-nextgroupmode' => $nextgroupmode)
-        );
+            $actions[$actionname] = new action_menu_link_primary(
+                new moodle_url($baseurl, array('id' => $mod->id, 'groupmode' => $nextgroupmode)),
+                new pix_icon($groupimage, $grouptitle, 'moodle', array('class' => 'iconsmall', 'title' => '')),
+                $grouptitle,
+                array('class' => 'editing_'. $actionname, 'data-action' => $actionname, 'data-nextgroupmode' => $nextgroupmode)
+            );
+        } else {
+            $actions['nogroupsupport'] = new action_menu_filler();
+        }
     }
 
     // Assign.

lib/outputcomponents.php

@@ -3182,7 +3182,7 @@ class action_menu implements renderable {
      * @param action_menu_link|pix_icon|string $action
      */
     public function add($action) {
-        if ($action instanceof action_menu_link) {
+        if ($action instanceof action_link) {
             if ($action->primary) {
                 $this->add_primary_action($action);
             } else {
@@ -3371,6 +3371,29 @@ class action_menu implements renderable {
     }
 }
 
+/**
+ * An action menu filler
+ *
+ * @package core
+ * @category output
+ * @copyright 2013 Andrew Nicols
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class action_menu_filler extends action_link implements renderable {
+
+    /**
+     * True if this is a primary action. False if not.
+     * @var bool
+     */
+    public $primary = true;
+
+    /**
+     * Constructs the object.
+     */
+    public function __construct() {
+    }
+}
+
 /**
  * An action menu action
  *

lib/outputrenderers.php

@@ -1161,6 +1161,16 @@ class core_renderer extends renderer_base {
         return html_writer::tag('a', $icon.$text, $attributes);
     }
 
+    /**
+     * Renders a primary action_menu_filler item.
+     *
+     * @param action_menu_link_filler $action
+     * @return string HTML fragment
+     */
+    protected function render_action_menu_filler(action_menu_filler $action) {
+        return html_writer::span(' ', 'filler');
+    }
+
     /**
      * Renders a primary action_menu_link item.
      *

theme/base/style/course.css

@@ -32,6 +32,14 @@
 .course-content .section .activity .activityinstance form { display: inline;}
 .sitetopic .section .activity .activityinstance,
 .course-content .section .activity .activityinstance { padding-right: 1em; }
+.course-content .section .activity .filler {
+    width: 16px;
+    height: 16px;
+    margin: 4px;
+    display: inline-block;
+    vertical-align: text-bottom;
+}
+
 .dir-rtl .sitetopic .section .activity .activityinstance,
 .dir-rtl .course-content .section .activity .activityinstance { padding-right: 0; padding-left: 3em;}
 .sitetopic .section .activity .commands,

theme/bootstrapbase/less/moodle/course.less

@@ -51,6 +51,13 @@
         }
     }
 
+    .filler {
+        width: 16px;
+        height: 16px;
+        padding: 0.3em;
+        display: inline-block;
+    }
+
     .activity.editor_displayed {
         a.editing_title,
         .moodle-actionmenu {