From ece6b8257047bfec13877a61d71d02bfa7384af0 Mon Sep 17 00:00:00 2001
From: Felipe Borges <felipeborges@gnome.org>
Date: Mon, 24 Aug 2020 12:24:55 +0200
Subject: files-view: Use xdg-desktop-portal for setting Wallpaper

If libportal was found during build, we can use libportal to set
the Wallpaper. Otherwise, we fallback to the old Nautilus behavior
of directly copying the image and updating the gsetting.

Fixes #795
---
 src/nautilus-files-view.c | 104 +++++++++++++++++++++++++++++++++++-----------
 1 file changed, 80 insertions(+), 24 deletions(-)

diff --git a/src/nautilus-files-view.c b/src/nautilus-files-view.c
index b22bd8408..678ad98b6 100644
--- a/src/nautilus-files-view.c
+++ b/src/nautilus-files-view.c
@@ -90,6 +90,11 @@
 #include "nautilus-window.h"
 #include "nautilus-tracker-utilities.h"
 
+#ifdef HAVE_LIBPORTAL
+#include <libportal/portal.h>
+#include <libportal/portal-gtk3.h>
+#endif
+
 /* Minimum starting update inverval */
 #define UPDATE_INTERVAL_MIN 100
 /* Maximum update interval */
@@ -6691,6 +6696,76 @@ can_set_wallpaper (GList *selection)
     return TRUE;
 }
 
+#ifdef HAVE_LIBPORTAL
+static void
+set_wallpaper_with_portal_cb (GObject      *source,
+                              GAsyncResult *result,
+                              gpointer      user_data)
+{
+    XdpPortal *portal = XDP_PORTAL (source);
+    g_autoptr (GError) error = NULL;
+
+    if (!xdp_portal_set_wallpaper_finish (portal, result, &error)
+        && !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
+    {
+        g_warning ("Failed to set wallpaper via portal: %s", error->message);
+    }
+}
+
+static void
+set_wallpaper_with_portal (NautilusFile *file,
+                           gpointer      user_data)
+{
+    g_autoptr (XdpPortal) portal = NULL;
+    g_autofree gchar *uri = NULL;
+    XdpParent *parent = NULL;
+    GtkWidget *toplevel;
+
+    portal = xdp_portal_new ();
+    toplevel = gtk_widget_get_ancestor (GTK_WIDGET (user_data), GTK_TYPE_WINDOW);
+    parent = xdp_parent_new_gtk (GTK_WINDOW (toplevel));
+    uri = nautilus_file_get_uri (file);
+
+    xdp_portal_set_wallpaper (portal,
+                              parent,
+                              uri,
+                              XDP_WALLPAPER_FLAG_BACKGROUND | XDP_WALLPAPER_FLAG_PREVIEW,
+                              NULL,
+                              set_wallpaper_with_portal_cb,
+                              NULL);
+    xdp_parent_free (parent);
+}
+#endif /* HAVE_LIBPORTAL */
+
+static void
+set_wallpaper_fallback (NautilusFile *file,
+                        gpointer      user_data)
+{
+    char *target_uri;
+    GList *uris;
+    GFile *parent;
+    GFile *target;
+
+    /* Copy the item to Pictures/Wallpaper (internationalized) since it may be
+     *  remote. Then set it as the current wallpaper. */
+    parent = g_file_new_for_path (g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
+    target = g_file_get_child (parent, _("Wallpapers"));
+    g_object_unref (parent);
+    g_file_make_directory_with_parents (target, NULL, NULL);
+    target_uri = g_file_get_uri (target);
+    g_object_unref (target);
+    uris = g_list_prepend (NULL, nautilus_file_get_uri (file));
+    nautilus_file_operations_copy_move (uris,
+                                        target_uri,
+                                        GDK_ACTION_COPY,
+                                        GTK_WIDGET (user_data),
+                                        NULL,
+                                        wallpaper_copy_done_callback,
+                                        NULL);
+    g_free (target_uri);
+    g_list_free_full (uris, g_free);
+}
+
 static void
 action_set_as_wallpaper (GSimpleAction *action,
                          GVariant      *state,
@@ -6698,39 +6773,20 @@ action_set_as_wallpaper (GSimpleAction *action,
 {
     g_autolist (NautilusFile) selection = NULL;
 
-    /* Copy the item to Pictures/Wallpaper (internationalized) since it may be
-     *  remote. Then set it as the current wallpaper. */
-
     g_assert (NAUTILUS_IS_FILES_VIEW (user_data));
 
     selection = nautilus_view_get_selection (user_data);
-
     if (can_set_wallpaper (selection))
     {
         NautilusFile *file;
-        char *target_uri;
-        GList *uris;
-        GFile *parent;
-        GFile *target;
 
         file = NAUTILUS_FILE (selection->data);
 
-        parent = g_file_new_for_path (g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
-        target = g_file_get_child (parent, _("Wallpapers"));
-        g_object_unref (parent);
-        g_file_make_directory_with_parents (target, NULL, NULL);
-        target_uri = g_file_get_uri (target);
-        g_object_unref (target);
-        uris = g_list_prepend (NULL, nautilus_file_get_uri (file));
-        nautilus_file_operations_copy_move (uris,
-                                            target_uri,
-                                            GDK_ACTION_COPY,
-                                            GTK_WIDGET (user_data),
-                                            NULL,
-                                            wallpaper_copy_done_callback,
-                                            NULL);
-        g_free (target_uri);
-        g_list_free_full (uris, g_free);
+#ifdef HAVE_LIBPORTAL
+        set_wallpaper_with_portal (file, user_data);
+#else
+        set_wallpaper_fallback (file, user_data);
+#endif
     }
 }
 
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