Implement option "disabled" for picker fields (#6498)

CHANGELOG-DEV.md

@@ -13,6 +13,7 @@ HumHub Changelog
 - Enh #68: Online Indicator Position
 - Fix #6492: Fix module form "Set as default"
 - Fix #6457: Regression with membership cache. Also move cache to `Membership::findMembership`.
+- Enh #6498: Implement option "disabled" for picker fields
 
 1.15.0-beta.1 (July 31, 2023)
 -----------------------------

protected/humhub/modules/ui/form/widgets/BasePicker.php

@@ -2,9 +2,7 @@
 
 namespace humhub\modules\ui\form\widgets;
 
-use humhub\components\ActiveRecord;
 use Yii;
-use yii\base\Model;
 use yii\db\ActiveQuery;
 use yii\helpers\Html;
 use yii\helpers\Url;
@@ -48,9 +46,16 @@ abstract class BasePicker extends JsInputWidget
 
     /**
      * Disabled items
+     * @var array
      */
     public $disabledItems;
 
+    /**
+     * Disables the picker field
+     * @var bool
+     */
+    public $disabled = false;
+
     /**
      * Default route used for search queries.
      * This can be overwritten by defining the $url.
@@ -415,7 +420,8 @@ abstract class BasePicker extends JsInputWidget
             'load-more' => Yii::t('UserModule.chooser', 'Load more'),
             'input-too-short' => Yii::t('UserModule.chooser', 'Please enter at least {n} character', ['n' => $this->minInput]),
             'input-too-long' => Yii::t('UserModule.chooser', 'You reached the maximum number of allowed characters ({n}).', ['n' => $this->maxInput]),
-            'default-results' => $this->getDefaultResultData()
+            'default-results' => $this->getDefaultResultData(),
+            'disabled' => $this->disabled
         ];
 
         if (!empty($this->disabledItems)) {

static/css/select2Theme/select2-humhub.less

@@ -278,10 +278,12 @@
             cursor: @cursor-disabled;
         }
 
-        .select2-selection,
+        .select2-selection {
-        .select2-selection--multiple .select2-selection__choice {
             background-color: @input-bg-disabled;
         }
+        .select2-selection--multiple .select2-selection__choice {
+            background-color: @btn-link-disabled-color;
+        }
 
         .select2-selection__clear,
         .select2-selection--multiple .select2-selection__choice__remove {