[file-roller] Use HdyStyleManager and enable dark mode

[Jeremy Bicha <jbicha src gnome org>]

commit c83abf0776fb7bf5db27e296013da19bf36d99cc
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Tue Oct 5 08:26:46 2021 +0200

    Use HdyStyleManager and enable dark mode

 meson.build          | 2 ++
 src/fr-application.c | 6 ++++++
 src/meson.build      | 1 +
 3 files changed, 9 insertions(+)
---
diff --git a/meson.build b/meson.build
index c1b9ce4d..cf5c4c75 100644
--- a/meson.build
+++ b/meson.build
@@ -6,6 +6,7 @@ project('file-roller', 'c',
 
 glib_version = '>=2.38'
 gtk_version = '>=3.22.0'
+hdy_version = '>=1.4.0'
 nautilus_version = '>=3.28.0'
 json_glib_version = '>=0.14.0'
 libnotify_version = '>=0.4.3'
@@ -28,6 +29,7 @@ thread_dep = dependency('threads')
 glib_dep = dependency('glib-2.0', version : glib_version)
 gthread_dep = dependency('gthread-2.0')
 gtk_dep = dependency('gtk+-3.0', version : gtk_version)
+hdy_dep = dependency('libhandy-1', version: hdy_version)
 
 # Optional dependencies
 
diff --git a/src/fr-application.c b/src/fr-application.c
index 7b4cd95a..17df6eb6 100644
--- a/src/fr-application.c
+++ b/src/fr-application.c
@@ -28,6 +28,7 @@
 #include <glib/gi18n.h>
 #include <gtk/gtk.h>
 #include <glib/gprintf.h>
+#include <handy.h>
 #ifdef ENABLE_NOTIFICATION
 #  include <libnotify/notify.h>
 #endif
@@ -448,6 +449,7 @@ static void
 fr_application_startup (GApplication *application)
 {
        GtkSettings     *gtk_settings;
+       HdyStyleManager *style_manager;
        gboolean         shell_shows_menubar;
 
     g_application_set_resource_base_path (application, "/org/gnome/FileRoller");
@@ -471,6 +473,10 @@ fr_application_startup (GApplication *application)
                      "gtk-shell-shows-menubar", &shell_shows_menubar,
                      NULL);
 
+       hdy_init ();
+       hdy_style_manager_set_color_scheme (hdy_style_manager_get_default (),
+                                           HDY_COLOR_SCHEME_PREFER_LIGHT);
+
        if (shell_shows_menubar)
                initialize_app_menubar (application);
        else
diff --git a/src/meson.build b/src/meson.build
index 8083aacc..c0d2fb9e 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -90,6 +90,7 @@ executable('file-roller',
     glib_dep, 
     gthread_dep, 
     gtk_dep, 
+    hdy_dep,
     use_json_glib ? libjson_glib_dep : [],
     use_libnotify ? libnotify_dep : [],
     use_libarchive ? libarchive_dep : []