1 files changed, 56 insertions, 0 deletions
diff --git a/src/plugins/platforms/xcb/qxcbnativeinterface.cpp b/src/plugins/platforms/xcb/qxcbnativeinterface.cpp
index d989761297..22d90d6ac2 100644
--- a/src/plugins/platforms/xcb/qxcbnativeinterface.cpp
+++ b/src/plugins/platforms/xcb/qxcbnativeinterface.cpp
@@ -673,4 +673,60 @@ void *QXcbNativeInterface::handlerNativeResourceForBackingStore(const QByteArray
     return nullptr;
 }
 
+static void dumpNativeWindowsRecursion(const QXcbConnection *connection, xcb_window_t window,
+                                       int level, QTextStream &str)
+{
+    if (level)
+        str << QByteArray(2 * level, ' ');
+
+    xcb_connection_t *conn = connection->xcb_connection();
+    auto geomReply = Q_XCB_REPLY(xcb_get_geometry, conn, window);
+    if (!geomReply)
+        return;
+    const QRect geom(geomReply->x, geomReply->y, geomReply->width, geomReply->height);
+    if (!geom.isValid() || (geom.width() <= 3 && geom.height() <= 3))
+        return; // Skip helper/dummy windows.
+    str << "0x";
+    const int oldFieldWidth = str.fieldWidth();
+    const QChar oldPadChar =str.padChar();
+    str.setFieldWidth(8);
+    str.setPadChar(QLatin1Char('0'));
+    str << hex << window;
+    str.setFieldWidth(oldFieldWidth);
+    str.setPadChar(oldPadChar);
+    str << dec << " \""
+        << QXcbWindow::windowTitle(connection, window) << "\" "
+        << geom.width() << 'x' << geom.height() << forcesign << geom.x() << geom.y()
+        << noforcesign << '\n';
+
+    auto reply = Q_XCB_REPLY(xcb_query_tree, conn, window);
+    if (reply) {
+        const int count = xcb_query_tree_children_length(reply.get());
+        const xcb_window_t *children = xcb_query_tree_children(reply.get());
+        for (int i = 0; i < count; ++i)
+            dumpNativeWindowsRecursion(connection, children[i], level + 1, str);
+    }
+}
+
+QString QXcbNativeInterface::dumpConnectionNativeWindows(const QXcbConnection *connection, WId root) const
+{
+    QString result;
+    QTextStream str(&result);
+    if (root) {
+        dumpNativeWindowsRecursion(connection, xcb_window_t(root), 0, str);
+    } else {
+        for (const QXcbScreen *screen : connection->screens()) {
+            str << "Screen: \"" << screen->name() << "\"\n";
+            dumpNativeWindowsRecursion(connection, screen->root(), 0, str);
+            str << '\n';
+        }
+    }
+    return result;
+}
+
+QString QXcbNativeInterface::dumpNativeWindows(WId root) const
+{
+    return dumpConnectionNativeWindows(QXcbIntegration::instance()->defaultConnection(), root);
+}
+
 QT_END_NAMESPACE