From 2066a4899588bd83d2ee2dd8a8c94124a72572c4 Mon Sep 17 00:00:00 2001
From: Marco Allegretti <mightymarco4@gmail.com>
Date: Mon, 25 May 2026 08:26:52 +0200
Subject: [PATCH] Allow multiple shell input regions

A unified chrome surface needs separate interactive areas for the
top bar and dock while the workspace passes input through. Add
ShellUtil::setInputRegions() and keep setInputRegion() as the
compatibility wrapper.
---
 components/mobileshell/shellutil.cpp | 21 ++++++++++++++++++---
 components/mobileshell/shellutil.h   |  8 ++++++++
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/components/mobileshell/shellutil.cpp b/components/mobileshell/shellutil.cpp
index 8bbc1837..4fabaf69 100644
--- a/components/mobileshell/shellutil.cpp
+++ b/components/mobileshell/shellutil.cpp
@@ -121,12 +121,22 @@ void ShellUtil::setWindowLayer(QQuickWindow *window, LayerShellQt::Window::Layer
 }
 
 void ShellUtil::setInputRegion(QWindow *window, const QRect &region)
+{
+    setInputRegions(window, region.isEmpty() ? QVariantList{} : QVariantList{region});
+}
+
+void ShellUtil::setInputRegions(QWindow *window, const QVariantList &regions)
 {
     if (!window) {
         return;
     }
 
-    auto waylandWindow = dynamic_cast<QtWaylandClient::QWaylandWindow *>(window->handle());
+    auto handle = window->handle();
+    if (!handle) {
+        return;
+    }
+
+    auto waylandWindow = dynamic_cast<QtWaylandClient::QWaylandWindow *>(handle);
     if (!waylandWindow) {
         qWarning() << "Failed to retrieve Wayland window handle.";
         return;
@@ -150,12 +160,17 @@ void ShellUtil::setInputRegion(QWindow *window, const QRect &region)
         return;
     }
 
-    if (region.isEmpty()) {
+    if (regions.isEmpty()) {
         wl_surface_set_input_region(surface, nullptr);
     } else {
         wl_region *inputRegion = wl_compositor_create_region(compositorResource);
 
-        wl_region_add(inputRegion, region.x(), region.y(), region.width(), region.height());
+        for (const QVariant &value : regions) {
+            const QRect region = value.toRect();
+            if (!region.isEmpty()) {
+                wl_region_add(inputRegion, region.x(), region.y(), region.width(), region.height());
+            }
+        }
         wl_surface_set_input_region(surface, inputRegion);
         wl_region_destroy(inputRegion);
     }
diff --git a/components/mobileshell/shellutil.h b/components/mobileshell/shellutil.h
index 2b6f56a1..1c67666e 100644
--- a/components/mobileshell/shellutil.h
+++ b/components/mobileshell/shellutil.h
@@ -10,6 +10,7 @@
 #include <QObject>
 #include <QQuickItem>
 #include <QQuickWindow>
+#include <QVariantList>
 #include <qqmlregistration.h>
 
 #include <KConfigWatcher>
@@ -84,6 +85,13 @@ public:
      */
     Q_INVOKABLE void setInputRegion(QWindow *window, const QRect &region);
 
+    /**
+     * Sets multiple regions where inputs will get registered on a window.
+     * Inputs outside the regions will pass through to the surface below.
+     * Set this to an empty list to fill the whole window again.
+     */
+    Q_INVOKABLE void setInputRegions(QWindow *window, const QVariantList &regions);
+
     /**
      * Converts rich text to plain text.
      */