feat(cardputerzero): adapt Cardputer Zero

platform/linux/common/src/ui/ui_common.cpp

@@ -1,20 +1,61 @@
 #include "ui/ui_common.h"
 
+#include <cstdio>
+#include <ctime>
+
 #include "platform/ui/time_runtime.h"
+#include "ui/widgets/top_bar.h"
 
 namespace
 {
 
-void noop_top_bar_battery_update()
+bool resolve_display_time(std::tm& out)
 {
+    if (::platform::ui::time::localtime_now(&out))
+    {
+        return true;
+    }
+
+    const std::time_t now = std::time(nullptr);
+    if (now <= 0)
+    {
+        return false;
+    }
+
+    const std::time_t local = ::platform::ui::time::apply_timezone_offset(now);
+    const std::tm* tmp = std::gmtime(&local);
+    if (!tmp)
+    {
+        return false;
+    }
+
+    out = *tmp;
+    return true;
+}
+
+void format_top_bar_time(char* out, std::size_t out_len)
+{
+    if (!out || out_len == 0)
+    {
+        return;
+    }
+
+    std::tm info{};
+    if (!resolve_display_time(info) ||
+        std::strftime(out, out_len, "%H:%M", &info) == 0)
+    {
+        std::snprintf(out, out_len, "--:--");
+    }
 }
 
 } // namespace
 
 void ui_update_top_bar_battery(ui::widgets::TopBar& bar)
 {
-    (void)bar;
-    noop_top_bar_battery_update();
+    char time_buf[16] = "--:--";
+
+    format_top_bar_time(time_buf, sizeof(time_buf));
+    ui::widgets::top_bar_set_right_text_ascii(bar, time_buf);
 }
 
 int ui_get_timezone_offset_min()