Use document imports of QtQuick.Controls.impl, not qmldir-imports

qmldir-imports are transitive, meaning that we were exposing all types
from QtQuick.Controls.impl each time QtQuick.Controls was imported.

This patch removes these transitive qmldir-imports by moving the
foreign type declarations for QQuickOverlay and
QQuickSplitHandleAttached into the Basic style (which is always
imported by every style as a final fallback).

Task-number: QTBUG-104768
Task-number: QTBUG-123103
Change-Id: Ia0ff778a88a38bb872730e055631dc924456d7be
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

6 files changed, 65 insertions, 2 deletions

diff --git a/src/quickcontrols/basic/CMakeLists.txt b/src/quickcontrols/basic/CMakeLists.txt
index 12404f0851..a9ed8f1f2a 100644
--- a/src/quickcontrols/basic/CMakeLists.txt
+++ b/src/quickcontrols/basic/CMakeLists.txt
@@ -157,14 +157,13 @@ qt_internal_add_qml_module(QuickControls2Basic
     CLASS_NAME QtQuickControls2BasicStylePlugin
     DEPENDENCIES
         QtQuick/auto
-    IMPORTS
-        QtQuick.Controls.impl/auto
     PLUGIN_TARGET qtquickcontrols2basicstyleplugin
     NO_PLUGIN_OPTIONAL
     NO_GENERATE_PLUGIN_SOURCE
     SOURCES
         qquickbasicstyle.cpp qquickbasicstyle_p.h
         qquickbasictheme.cpp qquickbasictheme_p.h
+        qtquickcontrols2basicforeign.cpp qtquickcontrols2basicforeign_p.h
     QML_FILES
         ${qml_files}
     DEFINES
diff --git a/src/quickcontrols/basic/qtquickcontrols2basicforeign.cpp b/src/quickcontrols/basic/qtquickcontrols2basicforeign.cpp
new file mode 100644
index 0000000000..7a5472e758
--- /dev/null
+++ b/src/quickcontrols/basic/qtquickcontrols2basicforeign.cpp
@@ -0,0 +1,10 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qtquickcontrols2basicforeign_p.h"
+
+QT_BEGIN_NAMESPACE
+
+QT_END_NAMESPACE
+
+#include "moc_qtquickcontrols2basicforeign_p.cpp"
diff --git a/src/quickcontrols/basic/qtquickcontrols2basicforeign_p.h b/src/quickcontrols/basic/qtquickcontrols2basicforeign_p.h
new file mode 100644
index 0000000000..203a1c69a3
--- /dev/null
+++ b/src/quickcontrols/basic/qtquickcontrols2basicforeign_p.h
@@ -0,0 +1,51 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+#ifndef QTQUICKCONTROLS2BASICFOREIGN_P_H
+#define QTQUICKCONTROLS2BASICFOREIGN_P_H
+
+#include <QtQml/qqml.h>
+#include <QtQuickTemplates2/private/qquickoverlay_p.h>
+#if QT_CONFIG(quicktemplates2_container)
+#include <QtQuickTemplates2/private/qquicksplitview_p.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+// These are necessary in order to use C++ types in a file where only QtQuick.Controls has been imported.
+// Control types like Button don't need this done for them, as each style module provides a Button type,
+// and QtQuick.Controls is a sort of alias for the active style import.
+
+struct QQuickOverlayAttachedForeign
+{
+    Q_GADGET
+    QML_NAMED_ELEMENT(Overlay)
+    QML_FOREIGN(QQuickOverlay)
+    QML_UNCREATABLE("")
+    QML_ADDED_IN_VERSION(2, 3)
+};
+
+#if QT_CONFIG(quicktemplates2_container)
+struct QQuickSplitHandleAttachedForeign
+{
+    Q_GADGET
+    QML_NAMED_ELEMENT(SplitHandle)
+    QML_FOREIGN(QQuickSplitHandleAttached)
+    QML_UNCREATABLE("")
+    QML_ADDED_IN_VERSION(2, 13)
+};
+#endif
+
+QT_END_NAMESPACE
+
+#endif // QTQUICKCONTROLS2BASICFOREIGN_P_H
diff --git a/src/quickcontrols/ios/DialogButtonBox.qml b/src/quickcontrols/ios/DialogButtonBox.qml
index 4dd5fec2a5..f04088a9d1 100644
--- a/src/quickcontrols/ios/DialogButtonBox.qml
+++ b/src/quickcontrols/ios/DialogButtonBox.qml
@@ -3,6 +3,7 @@
 
 import QtQuick
 import QtQuick.Templates as T
+import QtQuick.Controls.impl
 import QtQuick.Controls.iOS.impl
 
 T.DialogButtonBox {
diff --git a/src/quickcontrols/ios/impl/DialogButtonBoxDelegate.qml b/src/quickcontrols/ios/impl/DialogButtonBoxDelegate.qml
index ec506f6c06..2be1f9535e 100644
--- a/src/quickcontrols/ios/impl/DialogButtonBoxDelegate.qml
+++ b/src/quickcontrols/ios/impl/DialogButtonBoxDelegate.qml
@@ -3,6 +3,7 @@
 
 import QtQuick
 import QtQuick.Controls
+import QtQuick.Controls.impl
 import QtQuick.Controls.iOS.impl
 
 Button {
diff --git a/src/quickcontrols/material/Drawer.qml b/src/quickcontrols/material/Drawer.qml
index 915c98bb5a..fc31a19a84 100644
--- a/src/quickcontrols/material/Drawer.qml
+++ b/src/quickcontrols/material/Drawer.qml
@@ -3,6 +3,7 @@
 
 import QtQuick
 import QtQuick.Templates as T
+import QtQuick.Controls.impl
 import QtQuick.Controls.Material
 import QtQuick.Controls.Material.impl