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

@@ -24,7 +24,9 @@
 #endif /* COG_HAVE_LIBPORTAL */
 #include "../common/cog-gl-utils.h"
 #include "../common/egl-proc-address.h"
-
+#if COG_HAVE_LIBPORTAL
+#    include "cog-xdp-parent-x11.h"
+#endif /* COG_HAVE_LIBPORTAL */
 
 #ifndef EGL_EXT_platform_base
 #define EGL_EXT_platform_base 1
@@ -880,9 +882,9 @@ 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);
+    g_autoptr(XdpParent) xdp_parent = xdp_parent_new_x11(&s_window->xcb.window);
+
+    run_file_chooser(view, request, xdp_parent);
 }
 #endif /* COG_HAVE_LIBPORTAL */
 

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

@@ -0,0 +1,35 @@
+/*
+ * 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 +1,11 @@
+x11_platform_sources = []
+if libportal_dep.found()
+    x11_platform_sources += ['cog-xdp-parent-x11.c']
+endif
+
 x11_platform_plugin = shared_module('cogplatform-x11',
     'cog-platform-x11.c',
+    x11_platform_sources,
     c_args: ['-DG_LOG_DOMAIN="Cog-X11"'],
     dependencies: [
         wpebackend_fdo_dep,