x11: Add an XdpParent on file chooser dialog

This adds a new implementation of XdpParent. To get the "parent_window"
is simpler, it's just the window_id which is the window property of xcb.

platform/x11/cog-platform-x11.c

@@ -22,6 +22,7 @@
 #include "../common/cog-file-chooser.h"
 #include "../common/cog-gl-utils.h"
 #include "../common/egl-proc-address.h"
+#include "cog-xdp-parent-x11.h"
 
 
 #ifndef EGL_EXT_platform_base
@@ -877,9 +878,11 @@ cog_x11_platform_get_view_backend(CogPlatform *platform, WebKitWebView *related_
 static void
 on_run_file_chooser(WebKitWebView *view, WebKitFileChooserRequest *request)
 {
-    /* TODO: Disable input of main window and keep this new file chooser
-     * window always on top. This could be done adding an XdpParent. */
-    run_file_chooser(view, request, NULL);
+    XdpParent *xdp_parent = xdp_parent_new_x11(&s_window->xcb.window);
+
+    run_file_chooser(view, request, xdp_parent);
+
+    g_clear_pointer(&xdp_parent, xdp_parent_free);
 }
 
 static void

platform/x11/cog-xdp-parent-x11.c

@@ -0,0 +1,37 @@
+/*
+ * cog-xdp-parent-x11.c
+ * Copyright (C) 2023 SUSE Software Solutions Germany GmbH
+ *
+ * Distributed under terms of the MIT license.
+ */
+
+#include "cog-xdp-parent-x11.h"
+
+#include "../common/xdp-parent-private.h"
+
+static gboolean
+xdp_parent_export_x11 (XdpParent         *parent,
+                       XdpParentExported  callback,
+                       gpointer           user_data)
+{
+    xcb_window_t *window_id = (xcb_window_t*) parent->data;
+    guint32 xid = (guint32) *window_id;
+    g_autofree char *handle = g_strdup_printf ("x11:%x", xid);
+    callback (parent, handle, user_data);
+    return TRUE;
+}
+
+static void
+xdp_parent_unexport_x11 (XdpParent *parent)
+{
+}
+
+XdpParent *
+xdp_parent_new_x11 (xcb_window_t *window_id)
+{
+  XdpParent *parent = g_new0 (XdpParent, 1);
+  parent->parent_export = xdp_parent_export_x11;
+  parent->parent_unexport = xdp_parent_unexport_x11;
+  parent->data = (gpointer) window_id;
+  return parent;
+}

platform/x11/cog-xdp-parent-x11.h

@@ -0,0 +1,17 @@
+/*
+ * cog-xdp-parent-x11.h
+ * Copyright (C) 2023 SUSE Software Solutions Germany GmbH
+ *
+ * Distributed under terms of the MIT license.
+ */
+
+#pragma once
+
+#include <libportal/types.h>
+#include <xcb/xproto.h>
+
+G_BEGIN_DECLS
+
+XdpParent *xdp_parent_new_x11 (xcb_window_t *window);
+
+G_END_DECLS

platform/x11/meson.build

@@ -1,5 +1,6 @@
 x11_platform_plugin = shared_module('cogplatform-x11',
     'cog-platform-x11.c',
+    'cog-xdp-parent-x11.c',
     c_args: ['-DG_LOG_DOMAIN="Cog-X11"'],
     dependencies: [
         wpebackend_fdo_dep,