From 7ef7aaecac7def504e360a6e6fc5f9e132a2fa00 Mon Sep 17 00:00:00 2001
From: Jun Pataleta <jun@moodle.com>
Date: Thu, 27 Aug 2020 13:17:45 +0800
Subject: [PATCH 1/2] MDL-69262 core: Make instance count variable as a static
 class variable

With the static function variable $instance, calls to
\action_menu_link::export_for_template() from its subclasses are stored
in different variables. This causes duplicate IDs when different
implementations of action menu links are rendered on the action menu
trigger/link template. (e.g. action_menu_link and
action_menu_link_secondary both rendered on the same page).
To make the incrementing uniform for the action_menu_link class and its
implementations, the $instance variable is moved out of the
export_to_template() method and is now made to a static class variable.
---
 lib/outputcomponents.php | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/outputcomponents.php b/lib/outputcomponents.php
index e08b3d3ab97..b6277cb1cf8 100644
--- a/lib/outputcomponents.php
+++ b/lib/outputcomponents.php
@@ -4682,6 +4682,12 @@ class action_menu_link extends action_link implements renderable {
      */
     public $actionmenu = null;
 
+    /**
+     * The number of instances of this action menu link (and its subclasses).
+     * @var int
+     */
+    protected static $instance = 1;
+
     /**
      * Constructs the object.
      *
@@ -4705,10 +4711,8 @@ class action_menu_link extends action_link implements renderable {
      * @return stdClass
      */
     public function export_for_template(renderer_base $output) {
-        static $instance = 1;
-
         $data = parent::export_for_template($output);
-        $data->instance = $instance++;
+        $data->instance = self::$instance++;
 
         // Ignore what the parent did with the attributes, except for ID and class.
         $data->attributes = [];

From 6d0a5559eeadf512161b010c999668b8562ea8f4 Mon Sep 17 00:00:00 2001
From: Jun Pataleta <jun@moodle.com>
Date: Thu, 27 Aug 2020 13:23:24 +0800
Subject: [PATCH 2/2] MDL-69262 core: Use core/action_menu_link in
 core/action_menu_trigger

* Introduce the "actionmenulinkclasses" block in the action_menu_link
template so other templates importing it can have the option to override
its classes.
* Have the action menu trigger template use the action menu link
template to reduce code duplication.
---
 lib/templates/action_menu_link.mustache    |  9 ++++++++-
 lib/templates/action_menu_trigger.mustache | 13 +++----------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/lib/templates/action_menu_link.mustache b/lib/templates/action_menu_link.mustache
index 0184d49bbe4..a57beb2e0fb 100644
--- a/lib/templates/action_menu_link.mustache
+++ b/lib/templates/action_menu_link.mustache
@@ -27,7 +27,14 @@
     }
 }}
 {{^disabled}}
-    <a href="{{url}}" class="aabtn {{classes}}" {{#attributes}}{{name}}={{#quote}}{{value}}{{/quote}} {{/attributes}}{{#showtext}}aria-labelledby="actionmenuaction-{{instance}}"{{/showtext}}>{{#icon}}{{#pix}}{{key}}, {{component}}, {{title}}{{/pix}}{{/icon}}{{#showtext}}<span class="menu-action-text" id="actionmenuaction-{{instance}}">{{{text}}}</span>{{/showtext}}</a>
+    <a href="{{url}}" class="{{$actionmenulinkclasses}}aabtn {{classes}}{{/actionmenulinkclasses}}" {{#attributes}}{{name}}={{#quote}}{{value}}{{/quote}} {{/attributes}}{{#showtext}}aria-labelledby="actionmenuaction-{{instance}}"{{/showtext}}>
+        {{#icon}}
+            {{#pix}}{{key}}, {{component}}, {{title}}{{/pix}}
+        {{/icon}}
+        {{#showtext}}
+            <span class="menu-action-text" id="actionmenuaction-{{instance}}">{{{text}}}</span>
+        {{/showtext}}
+    </a>
 {{/disabled}}
 {{#disabled}}
     <span class="currentlink" role="menuitem">{{#icon}}{{#pix}}{{key}},{{component}},{{title}}{{/pix}}{{/icon}}{{{text}}}</span>
diff --git a/lib/templates/action_menu_trigger.mustache b/lib/templates/action_menu_trigger.mustache
index 8a172c9dfad..9c009fcdb1d 100644
--- a/lib/templates/action_menu_trigger.mustache
+++ b/lib/templates/action_menu_trigger.mustache
@@ -95,16 +95,9 @@
         <div class="dropdown-menu dropdown-menu-right {{classes}}"{{#attributes}} {{name}}="{{value}}"{{/attributes}}>
             {{#items}}
                 {{#actionmenulink}}
-                    <a href="{{url}}" class="dropdown-item {{classes}}" {{#attributes}}{{name}}={{#quote}}{{value}}{{/quote}} {{/attributes}}{{#showtext}}aria-labelledby="actionmenuaction-{{instance}}"{{/showtext}}>
-                        {{#icon}}
-                            {{#pix}}{{key}},{{component}},{{title}}{{/pix}}
-                        {{/icon}}
-                        {{#showtext}}
-                        <span class="menu-action-text" id="actionmenuaction-{{instance}}">
-                            {{{text}}}
-                        </span>
-                        {{/showtext}}
-                    </a>
+                    {{< core/action_menu_link}}
+                        {{$actionmenulinkclasses}}dropdown-item {{classes}}{{/actionmenulinkclasses}}
+                    {{/ core/action_menu_link}}
                 {{/actionmenulink}}
                 {{#actionmenufiller}}
                     <div class="dropdown-divider" role="presentation"><span class="filler">&nbsp;</span></div>