Use libadwaita & color scheme API

This allows to use a regular flat header bar and honor the system color
scheme. We also drop redundant css.

Fixes: #3

src/main.c

@@ -17,6 +17,7 @@
  */
 
 #include <glib/gi18n.h>
+#include <adwaita.h>
 
 #include "config.h"
 #include "window.h"
@@ -38,34 +39,19 @@ activate (GtkApplication *app)
 }
 
 
-static void
-startup (GtkApplication *app)
-{
-  g_autoptr (GtkCssProvider) styles = NULL;
-
-  styles = gtk_css_provider_new ();
-  gtk_css_provider_load_from_resource (styles, "/org/gnome/design/Typography/gtk/style.css");
-  gtk_style_context_add_provider_for_display (gdk_display_get_default (),
-                                              GTK_STYLE_PROVIDER (styles),
-                                              GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
-
-}
-
-
 int
 main (int   argc,
       char *argv[])
 {
-  g_autoptr (GtkApplication) app = NULL;
+  g_autoptr (AdwApplication) app = NULL;
 
   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
   textdomain (GETTEXT_PACKAGE);
 
-  app = gtk_application_new ("org.gnome.design.Typography", G_APPLICATION_FLAGS_NONE);
+  app = adw_application_new ("org.gnome.design.Typography", G_APPLICATION_FLAGS_NONE);
 
   g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
-  g_signal_connect (app, "startup", G_CALLBACK (startup), NULL);
 
   return g_application_run (G_APPLICATION (app), argc, argv);
 }

src/meson.build

@@ -5,6 +5,7 @@ sources = [
 
 deps = [
   dependency('gtk4'),
+  dependency('libadwaita-1'),
 ]
 
 gnome = import('gnome')

src/style.css

@@ -2,14 +2,6 @@
 	background-color: alpha(@theme_bg_color, 0.96);
 }
 
-.typography-window:not(.solid-csd):not(.fullscreen):not(.tiled):not(.tiled-top):not(.tiled-bottom):not(.tiled-left):not(.tiled-right):not(.maximized) {
-	border-radius: 8px;
-}
-
-.typography-window.maximised {
-	border-radius: 0;
-}
-
 .typography {
 	margin: 0 12px 12px 12px;
 }
@@ -17,16 +9,3 @@
 .typography-chars button {
 	font-weight: bold;
 }
-
-.typography-styles button:hover {
-	background: #deddda;
-}
-
-.typography-styles button:active {
-	background: #c0bfbc;
-}
-
-headerbar.flat {
-	background: none;
-	border: none;
-}