From eed30ff3520bd4371e91c1381b4f8ed8b0c78ab2 Mon Sep 17 00:00:00 2001
From: Volker Hilsheimer <volker.hilsheimer@qt.io>
Date: Thu, 18 Apr 2024 12:02:27 +0200
Subject: [PATCH] Replace expensive inherits with cheaper qobject_cast (1)

The accessibility implementations require the type to be fully
defined anyway in order to call type-specific APIs, so there's no
need to use inherits(). Use qobject_cast instead.

Change-Id: I5c013be57f48272a748451f4888911fe6aa6574e
Reviewed-by: Pavel Dubsky <pavel.dubsky@qt.io>
Reviewed-by: Santhosh Kumar <santhosh.kumar.selvaraj@qt.io>
(cherry picked from commit 3973d6c529605fbce8457d7663d244ebadbe7160)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/widgets/accessible/qaccessiblewidgets.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/widgets/accessible/qaccessiblewidgets.cpp b/src/widgets/accessible/qaccessiblewidgets.cpp
index 1c29de8caf4..5c2a3bd02b8 100644
--- a/src/widgets/accessible/qaccessiblewidgets.cpp
+++ b/src/widgets/accessible/qaccessiblewidgets.cpp
@@ -95,7 +95,7 @@ QWidgetList _q_ac_childWidgets(const QWidget *widget)
 QAccessiblePlainTextEdit::QAccessiblePlainTextEdit(QWidget* o)
   :QAccessibleTextWidget(o)
 {
-    Q_ASSERT(widget()->inherits("QPlainTextEdit"));
+    Q_ASSERT(qobject_cast<QPlainTextEdit *>(widget()));
 }
 
 QPlainTextEdit* QAccessiblePlainTextEdit::plainTextEdit() const
@@ -192,7 +192,7 @@ void QAccessiblePlainTextEdit::scrollToSubstring(int startIndex, int endIndex)
 QAccessibleTextEdit::QAccessibleTextEdit(QWidget *o)
 : QAccessibleTextWidget(o, QAccessible::EditableText)
 {
-    Q_ASSERT(widget()->inherits("QTextEdit"));
+    Q_ASSERT(qobject_cast<QTextEdit *>(widget()));
 }
 
 /*! Returns the text edit. */