fix cmd+backspace behavior in main chat dialog input (#6111)

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Bugfix: Don't create native messaging manifest file if browser directory doesn't exist. (#6116)
 - Bugfix: Make reply-cancel button less coarse-grained. (#6106)
 - Bugfix: Fixed missing BetterTTV live updates of emotes. (#6132)
+- Bugfix: Handle <kbd>CMD</kbd> + <kbd>BACKSPACE</kbd> behavior explicitly in main chat dialog input for macOS. (#6111)
 - Dev: Conan will no longer generate a `CMakeUserPresets.json` file. (#6117)
 - Dev: Pass `--force-openssl` when installing from CMake in Qt 6.8+. (#6129)
 

src/widgets/helper/ResizingTextEdit.cpp

@@ -131,6 +131,18 @@ bool ResizingTextEdit::eventFilter(QObject *obj, QEvent *event)
 }
 void ResizingTextEdit::keyPressEvent(QKeyEvent *event)
 {
+#ifdef Q_OS_MACOS
+    if ((event->modifiers() == Qt::ControlModifier) &&
+        (event->key() == Qt::Key_Backspace))
+    {
+        QTextCursor cursor = this->textCursor();
+        cursor.movePosition(QTextCursor::StartOfLine, QTextCursor::KeepAnchor);
+        cursor.removeSelectedText();
+        this->setTextCursor(cursor);
+        return;
+    }
+#endif
+
     event->ignore();
 
     this->keyPressed.invoke(event);