date-chooser-day: Add the .today style class to the current day

This will help making the current day pop out a bit.

src/gui/event-editor/gcal-date-chooser-day.c

@@ -22,6 +22,7 @@
 #include "config.h"
 
 #include "gcal-date-chooser-day.h"
+#include "gcal-date-time-utils.h"
 
 #include <stdlib.h>
 #include <langinfo.h>
@@ -166,11 +167,22 @@ void
 gcal_date_chooser_day_set_date (GcalDateChooserDay *self,
                                 GDateTime          *date)
 {
+  GtkWidget *widget = GTK_WIDGET (self);
+  g_autoptr (GDateTime) now = NULL;
   g_autofree gchar *text = NULL;
+  gboolean today;
 
   g_clear_pointer (&self->date, g_date_time_unref);
   self->date = g_date_time_ref (date);
 
+  now = g_date_time_new_now (g_date_time_get_timezone (date));
+  today = gcal_date_time_compare_date (date, now) == 0;
+
+  if (G_UNLIKELY (today))
+    gtk_widget_add_css_class (widget, "today");
+  else
+    gtk_widget_remove_css_class (widget, "today");
+
   text = g_strdup_printf ("%d", g_date_time_get_day_of_month (date));
   gtk_label_set_label (GTK_LABEL (self->label), text);
 }

src/theme/Adwaita.css

@@ -208,6 +208,23 @@ datechooser button.day:selected dot {
   background-color: @accent_fg_color;
 }
 
+datechooser button.day.today {
+  color: @accent_color;
+}
+
+datechooser button.day.today dot {
+  background-color: @accent_color;
+}
+
+datechooser button.day.today:selected {
+  background-color: @accent_bg_color;
+  color: @accent_fg_color;
+}
+
+datechooser button.day.today:selected dot {
+  background-color: @accent_fg_color;
+}
+
 datechooser button.day.other-month:not(:hover),
 datechooser button.day.other-month:backdrop {
   color: alpha(currentColor, 0.1);