From 1943de850159d6d471b7a031f9994ccb83f99f2c Mon Sep 17 00:00:00 2001
From: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
Date: Wed, 8 Mar 2023 12:27:49 +0200
Subject: [PATCH] Add a (temporary) way to attach popups to layer surfaces

The new API is temporary. It's needed to help us with porting plasma to
the layer shell protocol until Qt 6.6 is released, which includes
QWaylandShellSurface::attachPopup().
---
 src/interfaces/window.cpp | 18 ++++++++++++++++++
 src/interfaces/window.h   |  8 ++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/interfaces/window.cpp b/src/interfaces/window.cpp
index 1ae037e..9f582bb 100644
--- a/src/interfaces/window.cpp
+++ b/src/interfaces/window.cpp
@@ -6,6 +6,9 @@
 
 #include "window.h"
 #include "../qwaylandlayershellintegration_p.h"
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+#include "../qwaylandlayersurface_p.h"
+#endif
 
 #include <layershellqt_logging.h>
 
@@ -121,6 +124,21 @@ void Window::setDesiredOutput(QScreen *output)
     d->desiredOutput = output;
 }
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+void Window::attachPopup(QWindow *window, xdg_popup *popup)
+{
+    auto waylandWindow = dynamic_cast<QtWaylandClient::QWaylandWindow *>(window->handle());
+    if (!waylandWindow) {
+        return;
+    }
+
+    auto shellSurface = dynamic_cast<QWaylandLayerSurface *>(waylandWindow->shellSurface());
+    if (shellSurface) {
+        shellSurface->get_popup(popup);
+    }
+}
+#endif
+
 Window::Window(QWindow *window)
     : QObject(window)
     , d(new WindowPrivate(window))
diff --git a/src/interfaces/window.h b/src/interfaces/window.h
index 5ebc9b1..72e3b8c 100644
--- a/src/interfaces/window.h
+++ b/src/interfaces/window.h
@@ -14,6 +14,10 @@
 
 #include "layershellqt_export.h"
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+struct xdg_popup;
+#endif
+
 namespace LayerShellQt
 {
 class WindowPrivate;
@@ -93,6 +97,10 @@ public:
      */
     static Window *get(QWindow *window);
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 6, 0)
+    static void attachPopup(QWindow *window, xdg_popup *popup);
+#endif
+
 Q_SIGNALS:
     void anchorsChanged();
     void exclusionZoneChanged();