TextArea: it should be possible to scroll focused input (T1290309)

Author: Zedwag

packages/devextreme/js/__internal/ui/date_box/m_date_box.mask.ts

@@ -451,6 +451,10 @@ class DateBoxMask extends DateBoxBase {
     }
   }
 
+  _hasMouseWheelHandler(): boolean {
+    return true;
+  }
+
   _onMouseWheel(e): void {
     if (this._useMaskBehavior()) {
       this._partIncrease(e.delta > 0 ? FORWARD : BACKWARD, e);

packages/devextreme/js/__internal/ui/number_box/m_number_box.base.ts

@@ -182,6 +182,10 @@ class NumberBoxBase<
     this._keyPressed = true;
   }
 
+  _hasMouseWheelHandler(): boolean {
+    return true;
+  }
+
   _onMouseWheel(dxEvent): void {
     dxEvent.delta > 0 ? this._spinValueChange(1, dxEvent) : this._spinValueChange(-1, dxEvent);
   }

packages/devextreme/js/__internal/ui/text_box/m_text_editor.mask.ts

@@ -6,7 +6,6 @@ import {
 import messageLocalization from '@js/common/core/localization/message';
 import type { dxElementWrapper } from '@js/core/renderer';
 import $ from '@js/core/renderer';
-import { noop } from '@js/core/utils/common';
 import type { DeferredObj } from '@js/core/utils/deferred';
 import { extend } from '@js/core/utils/extend';
 import { each } from '@js/core/utils/iterator';
@@ -144,9 +143,7 @@ class TextEditorMask<
   }
 
   _attachMouseWheelEventHandlers(): void {
-    const hasMouseWheelHandler = this._onMouseWheel !== noop;
-
-    if (!hasMouseWheelHandler) {
+    if (!this._hasMouseWheelHandler()) {
       return;
     }
 
@@ -169,6 +166,10 @@ class TextEditorMask<
     });
   }
 
+  _hasMouseWheelHandler(): boolean {
+    return false;
+  }
+
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   _onMouseWheel(e?): void {}
 

packages/devextreme/testing/tests/DevExpress.ui.widgets.editors/textArea.tests.js

@@ -89,6 +89,17 @@ QUnit.module('rendering', () => {
         pointerMock($input).start().down().move(0, 40).scroll(0, 40).up();
         $(document).off('.dxtestns');
     });
+
+    QUnit.test('Wheel event inside focused TextArea should not trigger _onMouseWheel call (T1290309)', function(assert) {
+        const textArea = $('#textarea').dxTextArea({}).dxTextArea('instance');
+        const onMouseWheelSpy = sinon.spy(textArea, '_onMouseWheel');
+        const $input = textArea._input();
+
+        textArea.focus();
+        pointerMock($input).wheel(-10);
+
+        assert.strictEqual(onMouseWheelSpy.callCount, 0, '_onMouseWheel was not called');
+    });
 });
 
 QUnit.module('options changing', () => {