From a1a872e2d2eddbbca06224911f198db5f3e84cda Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Morten=20S=C3=B8rvig?= <morten.sorvig@qt.io>
Date: Fri, 22 Nov 2024 12:42:55 +0100
Subject: [PATCH] wasm: disable text drag for text edits
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Disable text drag if asyncify is not enabled.

Fixes: QTBUG-131256
Pick-to: 6.8
Change-Id: I6589f11dda42c2f41db610e7cfece8a3db6573db
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
(cherry picked from commit 665acc02cf106071d57d012bb68250c2ea5d0a2c)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/widgets/widgets/qwidgettextcontrol.cpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/widgets/widgets/qwidgettextcontrol.cpp b/src/widgets/widgets/qwidgettextcontrol.cpp
index ed189a91c51..710540c6f29 100644
--- a/src/widgets/widgets/qwidgettextcontrol.cpp
+++ b/src/widgets/widgets/qwidgettextcontrol.cpp
@@ -57,6 +57,9 @@
 #endif
 #include <QtGui/qaccessible.h>
 #include <QtCore/qmetaobject.h>
+#ifdef Q_OS_WASM
+#include <QtCore/private/qstdweb_p.h>
+#endif
 
 #include <private/qoffsetstringarray_p.h>
 
@@ -505,6 +508,13 @@ void QWidgetTextControlPrivate::setContent(Qt::TextFormat format, const QString
 
 void QWidgetTextControlPrivate::startDrag()
 {
+
+#ifdef Q_OS_WASM
+    // QDrag::exec() will crash without asyncify; disable drag instead.
+    if (!qstdweb::haveAsyncify())
+        return;
+#endif
+
 #if QT_CONFIG(draganddrop)
     Q_Q(QWidgetTextControl);
     mousePressed = false;