menu.List: add support for the enter key #4606

Author: tobiu

src/menu/List.mjs

@@ -304,13 +304,6 @@ class List extends BaseList {
         }
     }
 
-    /**
-     * @param {Object} data
-     */
-    onKeyDownEscape(data) {
-        this.floating && this.unmount()
-    }
-
     /**
      * @param {Object} data
      * @param {Object[]} data.path
@@ -349,15 +342,47 @@ class List extends BaseList {
     onItemClick(node, data) {
         super.onItemClick(node, data);
 
-        let me = this;
+        let me     = this,
+            record = data.record;
 
-        data.record.handler?.call(me, data);
+        record.handler?.call(me, record);
 
-        if (me.hideOnLeafItemClick && !data.record.items) {
+        if (me.hideOnLeafItemClick && !record.items) {
             me.unmount()
         }
     }
 
+    /**
+     * @param {String} nodeId
+     */
+    onKeyDownEnter(nodeId) {
+        let me       = this,
+            recordId = me.getItemRecordId(nodeId),
+            record   = me.store.get(recordId),
+            submenu;
+
+        record.handler?.call(me, record);
+
+        if (me.hideOnLeafItemClick && !record.items) {
+            me.unmount()
+        }
+
+        if (record.items) {
+            submenu = me.subMenuMap[me.getMenuMapId(recordId)];
+
+            if (submenu) {
+                me.toggleSubMenu(nodeId, record)
+            }
+        }
+    }
+
+    /**
+     * @param {Object} data
+     */
+    onKeyDownEscape(data) {
+        this.floating && this.unmount()
+    }
+
     /**
      * @param {String[]} items
      */
@@ -422,6 +447,22 @@ class List extends BaseList {
         });
     }
 
+    /**
+     * @param {String} nodeId
+     * @param {Object} record
+     */
+    toggleSubMenu(nodeId, record) {
+        let me       = this,
+            recordId = record[me.getKeyProperty()],
+            submenu  = me.subMenuMap[me.getMenuMapId(recordId)];
+
+        if (!submenu?.mounted) {
+            me.showSubMenu(nodeId, record)
+        } else {
+            me.hideSubMenu()
+        }
+    }
+
     /**
      *
      */