fix(macOS): command + delete (#6676)

Reviewed-by: pajlada <rasmus.karlsson@pajlada.com>
Reviewed-by: Nerixyz <nerixdev@outlook.de>

src/widgets/helper/CmdDeleteKeyFilter.cpp

@@ -0,0 +1,46 @@
+#include "widgets/helper/CmdDeleteKeyFilter.hpp"
+
+#include <QKeyEvent>
+#include <QTextCursor>
+#include <QTextEdit>
+
+CmdDeleteKeyFilter::CmdDeleteKeyFilter(QObject *parent)
+    : QObject(parent)
+{
+}
+
+bool CmdDeleteKeyFilter::eventFilter(QObject *obj, QEvent *event)
+{
+#ifdef Q_OS_MACOS
+    if (event->type() != QEvent::KeyPress)
+    {
+        return false;
+    }
+
+    auto *textEdit = qobject_cast<QTextEdit *>(obj);
+    const auto *keyEvent = dynamic_cast<QKeyEvent *>(event);
+
+    if (!textEdit || !keyEvent)
+    {
+        return false;
+    }
+
+    if (keyEvent->modifiers() == Qt::ControlModifier &&
+        keyEvent->key() == Qt::Key_Backspace)
+    {
+        QTextCursor cursor = textEdit->textCursor();
+
+        if (!cursor.hasSelection())
+        {
+            cursor.movePosition(QTextCursor::StartOfLine,
+                                QTextCursor::KeepAnchor);
+        }
+
+        cursor.removeSelectedText();
+        textEdit->setTextCursor(cursor);
+
+        return true;
+    }
+#endif
+    return false;
+}

src/widgets/helper/CmdDeleteKeyFilter.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <QObject>
+
+/// CmdDeleteKeyFilter is an event filter for QTextEdit objects
+///  to handle the behavior of the Command + Delete shortcut on macOS
+class CmdDeleteKeyFilter : public QObject
+{
+    Q_OBJECT
+public:
+    explicit CmdDeleteKeyFilter(QObject *parent = nullptr);
+
+protected:
+    bool eventFilter(QObject *obj, QEvent *event) override;
+};

src/widgets/helper/ResizingTextEdit.cpp

@@ -131,22 +131,6 @@ 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();
-        if (!cursor.hasSelection())
-        {
-            cursor.movePosition(QTextCursor::StartOfLine,
-                                QTextCursor::KeepAnchor);
-        }
-        cursor.removeSelectedText();
-        this->setTextCursor(cursor);
-        return;
-    }
-#endif
-
     event->ignore();
 
     this->keyPressed.invoke(event);