MDL-50491 admin: new setting class for list of filters.

filter/upgrade.txt

@@ -3,6 +3,10 @@ information provided here is intended especially for developers.
 
 === 3.0 ===
 
+
+* New admin setting class admin_setting_filter_types which can be used if you
+  want to make the disablefilters value in your code configurable.
+
 * Methods filter_manager::text_filtering_hash and moodle_text_filter::hash have been
   deprecated. There were use by the old Moodle filtered text caching system
   that was removed several releases ago.

lib/adminlib.php

@@ -4724,6 +4724,50 @@ class admin_setting_pickroles extends admin_setting_configmulticheckbox {
 }
 
 
+/**
+ * Admin setting that is a list of installed filter plugins.
+ *
+ * @copyright 2015 The Open University
+ * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+class admin_setting_pickfilters extends admin_setting_configmulticheckbox {
+
+    /**
+     * Constructor
+     *
+     * @param string $name unique ascii name, either 'mysetting' for settings
+     *      that in config, or 'myplugin/mysetting' for ones in config_plugins.
+     * @param string $visiblename localised name
+     * @param string $description localised long description
+     * @param array $default the default. E.g. array('urltolink' => 1, 'emoticons' => 1)
+     */
+    public function __construct($name, $visiblename, $description, $default) {
+        if (empty($default)) {
+            $default = array();
+        }
+        $this->load_choices();
+        foreach ($default as $plugin) {
+            if (!isset($this->choices[$plugin])) {
+                unset($default[$plugin]);
+            }
+        }
+        parent::__construct($name, $visiblename, $description, $default, null);
+    }
+
+    public function load_choices() {
+        if (is_array($this->choices)) {
+            return true;
+        }
+        $this->choices = array();
+
+        foreach (core_component::get_plugin_list('filter') as $plugin => $unused) {
+            $this->choices[$plugin] = filter_get_name($plugin);
+        }
+        return true;
+    }
+}
+
+
 /**
  * Text field with an advanced checkbox, that controls a additional $name.'_adv' setting.
  *