[gnome-todo] css-provider: Adjust to AdwStyleManager

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit f7189ccf6c13f77ff4106323aaa57ae054092450
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Fri Oct 8 12:55:46 2021 -0300

    css-provider: Adjust to AdwStyleManager

 src/gui/gtd-css-provider.c | 53 +++++++++++++---------------------------------
 1 file changed, 15 insertions(+), 38 deletions(-)
---
diff --git a/src/gui/gtd-css-provider.c b/src/gui/gtd-css-provider.c
index 8a358bd0..e8524fa2 100644
--- a/src/gui/gtd-css-provider.c
+++ b/src/gui/gtd-css-provider.c
@@ -22,6 +22,8 @@
 
 #include "gtd-css-provider.h"
 
+#include <adwaita.h>
+
 struct _GtdCssProvider
 {
   GObject             parent_instance;
@@ -83,10 +85,8 @@ update_css_provider (GtdCssProvider *self)
 {
   g_autofree gchar *theme_name = NULL;
   g_autofree gchar *resource_path = NULL;
-  GtkSettings *settings;
-  gboolean prefer_dark_theme = FALSE;
+  gboolean dark_theme = FALSE;
 
-  settings = gtk_settings_get_default ();
   theme_name = g_strdup (g_getenv ("GTK_THEME"));
 
   if (theme_name != NULL)
@@ -99,21 +99,19 @@ update_css_provider (GtdCssProvider *self)
         {
           *p = '\0';
           p++;
-          prefer_dark_theme = g_strcmp0 (p, "dark") == 0;
+          dark_theme = g_strcmp0 (p, "dark") == 0;
         }
     }
   else
     {
-      g_object_get (settings,
-                    "gtk-theme-name", &theme_name,
-                    "gtk-application-prefer-dark-theme", &prefer_dark_theme,
-                    NULL);
+      theme_name = g_strdup ("Adwaita");
+      dark_theme = adw_style_manager_get_dark (adw_style_manager_get_default ());
     }
 
   /* First check with full path to theme+variant */
   resource_path = g_strdup_printf ("%s/%s%s.css",
                                    self->base_path,
-                                   theme_name, prefer_dark_theme ? "-dark" : "");
+                                   theme_name, dark_theme ? "-dark" : "");
 
   if (!resource_exists (resource_path))
     {
@@ -151,53 +149,32 @@ do_update_cb (gpointer user_data)
 }
 
 static void
-dzl_css_provider_queue_update (GtdCssProvider *self)
+on_style_manager_color_scheme_changed_cb (GtdCssProvider  *self,
+                                          GParamSpec      *pspec,
+                                          AdwStyleManager *style_manager)
 {
   if (self->queued_update > 0)
     return;
 
-
   self->queued_update = g_idle_add_full (G_PRIORITY_LOW,
                                          do_update_cb,
                                          g_object_ref (self),
                                          g_object_unref);
 }
 
-static void
-on_settings_notify_gtk_theme_name_cb (GtdCssProvider *self,
-                                      GParamSpec     *pspec,
-                                      GtkSettings    *settings)
-{
-  dzl_css_provider_queue_update (self);
-}
-
-static void
-on_settings_notify_gtk_application_prefer_dark_theme_cb (GtdCssProvider *self,
-                                                         GParamSpec     *pspec,
-                                                         GtkSettings    *settings)
-{
-  dzl_css_provider_queue_update (self);
-}
-
 static void
 gtd_css_provider_constructed (GObject *object)
 {
   GtdCssProvider *self = (GtdCssProvider *)object;
-  GtkSettings *settings;
+  AdwStyleManager *style_manager;
 
   G_OBJECT_CLASS (gtd_css_provider_parent_class)->constructed (object);
 
-  settings = gtk_settings_get_default ();
-
-  g_signal_connect_object (settings,
-                           "notify::gtk-theme-name",
-                           G_CALLBACK (on_settings_notify_gtk_theme_name_cb),
-                           self,
-                           G_CONNECT_SWAPPED);
+  style_manager = adw_style_manager_get_default ();
 
-  g_signal_connect_object (settings,
-                           "notify::gtk-application-prefer-dark-theme",
-                           G_CALLBACK (on_settings_notify_gtk_application_prefer_dark_theme_cb),
+  g_signal_connect_object (style_manager,
+                           "notify::color-scheme",
+                           G_CALLBACK (on_style_manager_color_scheme_changed_cb),
                            self,
                            G_CONNECT_SWAPPED);