[gnome-photos/bilelmoussaoui/portal] set as background: Switch to using Wallpaper portal

[Bilal Elmoussaoui <bilelmoussaoui src gnome org>]

commit 1f2ceb7ac0284b10d9398f824320b3f1025160b9
Author: Bilal Elmoussaoui <belmouss redhat com>
Date:   Fri Aug 5 16:27:06 2022 +0200

    set as background: Switch to using Wallpaper portal

 flatpak/org.gnome.Photos.json | 16 ++++++++++
 meson.build                   |  2 ++
 src/meson.build               |  2 ++
 src/photos-application.c      | 71 ++++++++++++++++++++++++-------------------
 4 files changed, 60 insertions(+), 31 deletions(-)
---
diff --git a/flatpak/org.gnome.Photos.json b/flatpak/org.gnome.Photos.json
index 711914b6..ebbddf6e 100644
--- a/flatpak/org.gnome.Photos.json
+++ b/flatpak/org.gnome.Photos.json
@@ -284,6 +284,22 @@
                 }
             ]
         },
+        {
+            "name": "libportal",
+            "buildsystem": "meson",
+            "config-opts": [
+                "-Dbackends=gtk3",
+                "-Dintrospection=false",
+                "-Dvapi=false",
+                "-Ddocs=false",
+                "-Dtests=false"
+            ],
+            "sources": [{
+                "type": "git",
+                "url": "https://github.com/flatpak/libportal";,
+                "branch": "main"
+            }]
+        },
         {
             "name": "gnome-photos",
             "buildsystem": "meson",
diff --git a/meson.build b/meson.build
index b3240247..cbe13c08 100644
--- a/meson.build
+++ b/meson.build
@@ -161,6 +161,8 @@ gexiv_dep = dependency('gexiv2', version: '>= 0.14.0')
 gio_dep = dependency('gio-2.0')
 gio_unix_dep = dependency('gio-unix-2.0')
 glib_dep = dependency('glib-2.0', version: '>= 2.62.0')
+libportal_dep = dependency('libportal')
+libportal_gtk3_dep = dependency('libportal-gtk3')
 
 goa_dep = dependency('goa-1.0', version: '>= 3.8.0')
 config_h.set('GOA_API_IS_SUBJECT_TO_CHANGE', true)
diff --git a/src/meson.build b/src/meson.build
index 36ff204a..77b1bbc0 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -388,6 +388,8 @@ deps = [
   #libgdata_dep,
   libgnome_photos_dep,
   libhandy_dep,
+  libportal_dep,
+  libportal_gtk3_dep,
   m_dep,
   tracker_sparql_dep,
 ]
diff --git a/src/photos-application.c b/src/photos-application.c
index 91d3aec6..6ed31194 100644
--- a/src/photos-application.c
+++ b/src/photos-application.c
@@ -37,6 +37,8 @@
 #include <glib/gi18n.h>
 #include <grilo.h>
 #include <handy.h>
+#include <libportal/portal.h>
+#include <libportal-gtk3/portal-gtk3.h>
 #include <tracker-sparql.h>
 
 #include "photos-application.h"
@@ -80,8 +82,6 @@ struct _PhotosApplication
   GHashTable *refresh_miner_ids;
   GList *miners;
   GList *miners_running;
-  GSettings *bg_settings;
-  GSettings *ss_settings;
   GSimpleAction *blacks_exposure_action;
   GSimpleAction *contrast_action;
   GSimpleAction *crop_action;
@@ -170,13 +170,6 @@ static const GOptionEntry COMMAND_LINE_OPTIONS[] =
   { NULL }
 };
 
-static const gchar *DESKTOP_BACKGROUND_SCHEMA = "org.gnome.desktop.background";
-static const gchar *DESKTOP_SCREENSAVER_SCHEMA = "org.gnome.desktop.screensaver";
-static const gchar *DESKTOP_KEY_PICTURE_URI = "picture-uri";
-static const gchar *DESKTOP_KEY_PICTURE_OPTIONS = "picture-options";
-static const gchar *DESKTOP_KEY_COLOR_SHADING_TYPE = "color-shading-type";
-static const gchar *DESKTOP_KEY_PRIMARY_COLOR = "primary-color";
-static const gchar *DESKTOP_KEY_SECONDARY_COLOR = "secondary-color";
 static const gchar *MINER_FILES_NAME_PRIVATE = "org.gnome.Photos.Tracker3.Miner.Files";
 static const gchar *MINER_FILES_NAME_PRIVATE_CONTROL = "org.gnome.Photos.Tracker3.Miner.Files.Control";
 static const gchar *MINER_FILES_NAME_SESSION = "org.freedesktop.Tracker3.Miner.Files";
@@ -218,7 +211,7 @@ struct _PhotosApplicationSetBackgroundData
 {
   PhotosApplication *application;
   GFile *file;
-  GSettings *settings;
+  XdpWallpaperFlags flags;
 };
 
 static void photos_application_import_file_copy (GObject *source_object, GAsyncResult *res, gpointer 
user_data);
@@ -315,7 +308,7 @@ photos_application_refresh_data_free (PhotosApplicationRefreshData *data)
 
 
 static PhotosApplicationSetBackgroundData *
-photos_application_set_background_data_new (PhotosApplication *application, GFile *file, GSettings *settings)
+photos_application_set_background_data_new (PhotosApplication *application, GFile *file, XdpWallpaperFlags 
flags)
 {
   PhotosApplicationSetBackgroundData *data;
 
@@ -323,7 +316,7 @@ photos_application_set_background_data_new (PhotosApplication *application, GFil
   g_application_hold (G_APPLICATION (application));
   data->application = application;
   data->file = g_object_ref (file);
-  data->settings = g_object_ref (settings);
+  data->flags = flags;
   return data;
 }
 
@@ -333,7 +326,6 @@ photos_application_set_background_data_free (PhotosApplicationSetBackgroundData
 {
   g_application_release (G_APPLICATION (data->application));
   g_object_unref (data->file);
-  g_object_unref (data->settings);
   g_slice_free (PhotosApplicationSetBackgroundData, data);
 }
 
@@ -1981,13 +1973,31 @@ photos_application_save (PhotosApplication *self)
   g_signal_connect (dialog, "response", G_CALLBACK (photos_application_save_response), self);
 }
 
+static void
+photos_application_xdp_set_wallpaper_finish (GObject *source_object, GAsyncResult *res, gpointer user_data)
+{
+  g_autoptr (GError) error = NULL;
+  XdpPortal *portal = XDP_PORTAL (source_object);
+  g_autoptr (GFile) wallpaper_file = user_data;
+
+  if (!xdp_portal_set_wallpaper_finish (portal, res, &error))
+    {
+      g_warning ("Unable to set wallpaper: %s", error->message);
+    }
+
+  if (!g_file_delete (wallpaper_file, NULL, &error))
+    g_warning ("Unable to delete wallpaper file: %s", error->message);
+}
 
 static void
 photos_application_set_bg_common_save_to_file (GObject *source_object, GAsyncResult *res, gpointer user_data)
 {
   PhotosBaseItem *item = PHOTOS_BASE_ITEM (source_object);
   PhotosApplicationSetBackgroundData *data = (PhotosApplicationSetBackgroundData *) user_data;
-  g_autofree gchar *path = NULL;
+  XdpPortal *portal;
+  g_autofree gchar *uri = NULL;
+  GtkWindow *parent;
+  XdpParent * parent_window;
 
   {
     g_autoptr (GError) error = NULL;
@@ -1999,21 +2009,25 @@ photos_application_set_bg_common_save_to_file (GObject *source_object, GAsyncRes
       }
   }
 
-  path = g_file_get_path (data->file);
-
-  g_settings_set_string (data->settings, DESKTOP_KEY_PICTURE_URI, path);
-  g_settings_set_enum (data->settings, DESKTOP_KEY_PICTURE_OPTIONS, G_DESKTOP_BACKGROUND_STYLE_ZOOM);
-  g_settings_set_enum (data->settings, DESKTOP_KEY_COLOR_SHADING_TYPE, G_DESKTOP_BACKGROUND_SHADING_SOLID);
-  g_settings_set_string (data->settings, DESKTOP_KEY_PRIMARY_COLOR, "#000000000000");
-  g_settings_set_string (data->settings, DESKTOP_KEY_SECONDARY_COLOR, "#000000000000");
-
+  uri = g_file_get_uri (data->file);
+  portal = xdp_portal_new ();
+  parent = gtk_application_get_active_window (GTK_APPLICATION (data->application));
+  parent_window = xdp_parent_new_gtk (parent);
+
+  xdp_portal_set_wallpaper (portal,
+                            parent_window,
+                            uri,
+                            data->flags,
+                            NULL,
+                            photos_application_xdp_set_wallpaper_finish,
+                            g_object_ref (data->file));
  out:
   photos_application_set_background_data_free (data);
 }
 
 
 static void
-photos_application_set_bg_common (PhotosApplication *self, GSettings *settings)
+photos_application_set_bg_common (PhotosApplication *self, XdpWallpaperFlags flags)
 {
   g_autoptr (GFile) backgrounds_file = NULL;
   PhotosApplicationSetBackgroundData *data;
@@ -2045,7 +2059,7 @@ photos_application_set_bg_common (PhotosApplication *self, GSettings *settings)
   backgrounds_path = g_build_filename (backgrounds_dir, backgrounds_filename, NULL);
   backgrounds_file = g_file_new_for_path (backgrounds_path);
 
-  data = photos_application_set_background_data_new (self, backgrounds_file, settings);
+  data = photos_application_set_background_data_new (self, backgrounds_file, flags | 
XDP_WALLPAPER_FLAG_PREVIEW);
   photos_base_item_save_to_file_async (item,
                                        backgrounds_file,
                                        G_FILE_CREATE_PRIVATE | G_FILE_CREATE_REPLACE_DESTINATION,
@@ -2059,14 +2073,14 @@ photos_application_set_bg_common (PhotosApplication *self, GSettings *settings)
 static void
 photos_application_set_background (PhotosApplication *self)
 {
-  photos_application_set_bg_common (self, self->bg_settings);
+  photos_application_set_bg_common (self, XDP_WALLPAPER_FLAG_BACKGROUND);
 }
 
 
 static void
 photos_application_set_screensaver (PhotosApplication *self)
 {
-  photos_application_set_bg_common (self, self->ss_settings);
+  photos_application_set_bg_common (self, XDP_WALLPAPER_FLAG_LOCKSCREEN);
 }
 
 
@@ -2637,9 +2651,6 @@ photos_application_startup (GApplication *application)
   self->create_window_cancellable = g_cancellable_new ();
   self->refresh_miner_ids = g_hash_table_new (g_direct_hash, g_direct_equal);
 
-  self->bg_settings = g_settings_new (DESKTOP_BACKGROUND_SCHEMA);
-  self->ss_settings = g_settings_new (DESKTOP_SCREENSAVER_SCHEMA);
-
   icon_theme = gtk_icon_theme_get_default ();
   gtk_icon_theme_add_resource_path (icon_theme, "/org/gnome/Photos/icons");
 
@@ -2945,8 +2956,6 @@ photos_application_dispose (GObject *object)
     }
 
   g_clear_object (&self->create_window_cancellable);
-  g_clear_object (&self->bg_settings);
-  g_clear_object (&self->ss_settings);
   g_clear_object (&self->blacks_exposure_action);
   g_clear_object (&self->contrast_action);
   g_clear_object (&self->crop_action);