Implement selectAll() and selectNone()

Author: bendera

src/includes/vscode-select/OptionListController.ts

@@ -388,6 +388,32 @@ export class OptionListController implements ReactiveController {
     this._host.requestUpdate();
   }
 
+  selectAll() {
+    if (!this._multiSelect) {
+      return;
+    }
+
+    this._options.forEach((_, i) => {
+      this._options[i].selected = true;
+      this._selectedIndexes.add(i);
+    });
+
+    this._host.requestUpdate();
+  }
+
+  selectNone() {
+    if (!this._multiSelect) {
+      return;
+    }
+
+    this._options.forEach((_, i) => {
+      this._options[i].selected = false;
+    });
+    this._selectedIndexes.clear();
+
+    this._host.requestUpdate();
+  }
+
   //#endregion
 
   //#region private functions

src/vscode-multi-select/vscode-multi-select.ts

@@ -122,6 +122,14 @@ export class VscodeMultiSelect
     return this._internals.reportValidity();
   }
 
+  selectAll() {
+    this._opts.selectAll();
+  }
+
+  selectNone() {
+    this._opts.selectNone();
+  }
+
   private _internals: ElementInternals;
 
   constructor() {