Clock: 12 hour midnight format

- References #317 and adds the options `12:XX` and `00:XX` in `Settings > System > Midnight Format` to display the preferred clock format past midnight on all clocks (Desktop, Main Menu MNTM style, Lock screen and Nightstand clock app). "12:30 AM" -> "00:30" OR "12:30".

applications/services/desktop/desktop.c

@@ -58,10 +58,13 @@ static void desktop_clock_update(Desktop* desktop) {
     DateTime curr_dt;
     furi_hal_rtc_get_datetime(&curr_dt);
     bool time_format_12 = locale_get_time_format() == LocaleTimeFormat12h;
+    LocaleMidnightFormat midnight_format = locale_get_midnight_format();
 
     if(desktop->clock.hour != curr_dt.hour || desktop->clock.minute != curr_dt.minute ||
-       desktop->clock.format_12 != time_format_12) {
+       desktop->clock.format_12 != time_format_12 ||
+       desktop->clock.midnight_format != midnight_format) {
         desktop->clock.format_12 = time_format_12;
+        desktop->clock.midnight_format = midnight_format;
         desktop->clock.hour = curr_dt.hour;
         desktop->clock.minute = curr_dt.minute;
         view_port_update(desktop->clock_viewport);
@@ -96,7 +99,7 @@ static void desktop_clock_draw_callback(Canvas* canvas, void* context) {
             hour -= 12;
         }
         if(hour == 0) {
-            hour = 12;
+            hour = (desktop->clock.midnight_format == LocaleMidnightFormatZero) ? 0 : 12;
         }
     }
 

applications/services/desktop/desktop_i.h

@@ -5,6 +5,7 @@
 #include "desktop_keybinds.h"
 
 #include "animations/animation_manager.h"
+#include "locale/locale.h"
 #include "views/desktop_view_pin_timeout.h"
 #include "views/desktop_view_pin_input.h"
 #include "views/desktop_view_locked.h"
@@ -40,6 +41,7 @@ typedef struct {
     uint8_t hour;
     uint8_t minute;
     bool format_12; // 1 - 12 hour, 0 - 24H
+    LocaleMidnightFormat midnight_format;
 } DesktopClock;
 
 struct Desktop {

applications/services/desktop/views/desktop_view_locked.c

@@ -44,6 +44,7 @@ typedef struct {
     bool pin_locked;
     int8_t cover_offset;
     DesktopViewLockedState view_state;
+    LocaleMidnightFormat midnight_format;
 } DesktopViewLockedModel;
 
 void desktop_view_locked_set_callback(
@@ -79,6 +80,9 @@ void desktop_view_locked_draw_lockscreen(Canvas* canvas, void* m) {
     } else {
         pm = datetime.hour > 12;
         snprintf(meridian_str, 3, datetime.hour >= 12 ? "PM" : "AM");
+        if(datetime.hour == 0) {
+            datetime.hour = (model->midnight_format == LocaleMidnightFormatZero) ? 0 : 12;
+        }
     }
     snprintf(time_str, 9, "%.2d:%.2d", pm ? datetime.hour - 12 : datetime.hour, datetime.minute);
     snprintf(second_str, 5, ":%.2d", datetime.second);
@@ -297,6 +301,7 @@ void desktop_view_locked_lock(DesktopViewLocked* locked_view, bool pin_locked) {
     furi_assert(model->view_state == DesktopViewLockedStateUnlocked);
     model->view_state = DesktopViewLockedStateLocked;
     model->pin_locked = pin_locked;
+    model->midnight_format = locale_get_midnight_format();
     view_commit_model(locked_view->view, true);
 }
 

applications/services/gui/modules/menu.c

@@ -1,5 +1,6 @@
 #include "menu.h"
 
+#include "locale/locale.h"
 #include <gui/elements.h>
 #include <assets_icons.h>
 #include <gui/icon_i.h>
@@ -384,7 +385,10 @@ static void menu_draw_callback(Canvas* canvas, void* _model) {
                 hour -= 12;
             }
             if(hour == 0) {
-                hour = 12;
+                hour = (locale_get_midnight_format() == LocaleMidnightFormatTwelve &&
+                        locale_get_time_format() == LocaleTimeFormat12h) ?
+                           12 :
+                           0;
             }
             canvas_set_font(canvas, FontSecondary);
             char clk[20];

applications/services/locale/locale.c

@@ -18,6 +18,14 @@ void locale_set_time_format(LocaleTimeFormat format) {
     furi_hal_rtc_set_locale_timeformat((FuriHalRtcLocaleTimeFormat)format);
 }
 
+LocaleMidnightFormat locale_get_midnight_format(void) {
+    return (LocaleMidnightFormat)furi_hal_rtc_get_locale_midnightformat();
+}
+
+void locale_set_midnight_format(LocaleMidnightFormat format) {
+    furi_hal_rtc_set_locale_midnightformat((FuriHalRtcLocaleMidnightFormat)format);
+}
+
 LocaleDateFormat locale_get_date_format(void) {
     return (LocaleDateFormat)furi_hal_rtc_get_locale_dateformat();
 }

applications/services/locale/locale.h

@@ -18,6 +18,11 @@ typedef enum {
     LocaleTimeFormat12h = 1, /**< 12-hour format */
 } LocaleTimeFormat;
 
+typedef enum {
+    LocaleMidnightFormatTwelve = 0, /**< 12:XX format */
+    LocaleMidnightFormatZero = 1, /**< 00:XX format */
+} LocaleMidnightFormat;
+
 typedef enum {
     LocaleDateFormatDMY = 0, /**< Day/Month/Year */
     LocaleDateFormatMDY = 1, /**< Month/Day/Year */
@@ -64,6 +69,18 @@ LocaleTimeFormat locale_get_time_format(void);
  */
 void locale_set_time_format(LocaleTimeFormat format);
 
+/** Get Locale midnight format
+ *
+ * @return     The locale midnight format.
+ */
+LocaleMidnightFormat locale_get_midnight_format(void);
+
+/** Set Locale midnight format
+ *
+ * @param[in]  format  The locale midnight format
+ */
+void locale_set_midnight_format(LocaleMidnightFormat format);
+
 /** Format time to furi string
  *
  * @param[out] out_str       The FuriString to store formatted time

applications/settings/system/system_settings.c

@@ -165,6 +165,22 @@ static void time_format_changed(VariableItem* item) {
     locale_set_time_format(time_format_value[index]);
 }
 
+const char* const midnight_format_text[] = {
+    "12:XX",
+    "00:XX",
+};
+
+const uint32_t midnight_format_value[] = {
+    LocaleMidnightFormatTwelve,
+    LocaleMidnightFormatZero,
+};
+
+static void midnight_format_changed(VariableItem* item) {
+    uint8_t index = variable_item_get_current_value_index(item);
+    variable_item_set_current_value_text(item, midnight_format_text[index]);
+    locale_set_midnight_format(midnight_format_value[index]);
+}
+
 const char* const date_format_text[] = {
     "D/M/Y",
     "M/D/Y",
@@ -350,6 +366,17 @@ SystemSettings* system_settings_alloc(void) {
     variable_item_set_current_value_index(item, value_index);
     variable_item_set_current_value_text(item, time_format_text[value_index]);
 
+    item = variable_item_list_add(
+        app->var_item_list,
+        "Midnight Format",
+        COUNT_OF(midnight_format_text),
+        midnight_format_changed,
+        app);
+    value_index = value_index_uint32(
+        locale_get_midnight_format(), midnight_format_value, COUNT_OF(midnight_format_value));
+    variable_item_set_current_value_index(item, value_index);
+    variable_item_set_current_value_text(item, midnight_format_text[value_index]);
+
     item = variable_item_list_add(
         app->var_item_list, "Date Format", COUNT_OF(date_format_text), date_format_changed, app);
     value_index = value_index_uint32(

targets/f7/api_symbols.csv

@@ -1628,6 +1628,7 @@ Function,+,furi_hal_rtc_get_datetime,void,DateTime*
 Function,+,furi_hal_rtc_get_fault_data,uint32_t,
 Function,+,furi_hal_rtc_get_heap_track_mode,FuriHalRtcHeapTrackMode,
 Function,+,furi_hal_rtc_get_locale_dateformat,FuriHalRtcLocaleDateFormat,
+Function,+,furi_hal_rtc_get_locale_midnightformat,FuriHalRtcLocaleMidnightFormat,
 Function,+,furi_hal_rtc_get_locale_timeformat,FuriHalRtcLocaleTimeFormat,
 Function,+,furi_hal_rtc_get_locale_units,FuriHalRtcLocaleUnits,
 Function,+,furi_hal_rtc_get_log_baud_rate,FuriHalRtcLogBaudRate,
@@ -1651,6 +1652,7 @@ Function,+,furi_hal_rtc_set_fault_data,void,uint32_t
 Function,+,furi_hal_rtc_set_flag,void,FuriHalRtcFlag
 Function,+,furi_hal_rtc_set_heap_track_mode,void,FuriHalRtcHeapTrackMode
 Function,+,furi_hal_rtc_set_locale_dateformat,void,FuriHalRtcLocaleDateFormat
+Function,+,furi_hal_rtc_set_locale_midnightformat,void,FuriHalRtcLocaleMidnightFormat
 Function,+,furi_hal_rtc_set_locale_timeformat,void,FuriHalRtcLocaleTimeFormat
 Function,+,furi_hal_rtc_set_locale_units,void,FuriHalRtcLocaleUnits
 Function,+,furi_hal_rtc_set_log_baud_rate,void,FuriHalRtcLogBaudRate
@@ -2347,9 +2349,11 @@ Function,+,locale_format_date,void,"FuriString*, const DateTime*, const LocaleDa
 Function,+,locale_format_time,void,"FuriString*, const DateTime*, const LocaleTimeFormat, const _Bool"
 Function,+,locale_get_date_format,LocaleDateFormat,
 Function,+,locale_get_measurement_unit,LocaleMeasurementUnits,
+Function,+,locale_get_midnight_format,LocaleMidnightFormat,
 Function,+,locale_get_time_format,LocaleTimeFormat,
 Function,+,locale_set_date_format,void,LocaleDateFormat
 Function,+,locale_set_measurement_unit,void,LocaleMeasurementUnits
+Function,+,locale_set_midnight_format,void,LocaleMidnightFormat
 Function,+,locale_set_time_format,void,LocaleTimeFormat
 Function,-,log,double,double
 Function,-,log10,double,double

targets/f7/furi_hal/furi_hal_rtc.c

@@ -31,14 +31,14 @@ typedef struct {
     uint8_t log_level    : 4;
     uint8_t log_reserved : 4;
     uint8_t flags;
-    FuriHalRtcBootMode boot_mode                 : 4;
-    FuriHalRtcHeapTrackMode heap_track_mode      : 2;
-    FuriHalRtcLocaleUnits locale_units           : 1;
-    FuriHalRtcLocaleTimeFormat locale_timeformat : 1;
-    FuriHalRtcLocaleDateFormat locale_dateformat : 2;
-    FuriHalRtcLogDevice log_device               : 2;
-    FuriHalRtcLogBaudRate log_baud_rate          : 3;
-    uint8_t reserved                             : 1;
+    FuriHalRtcBootMode boot_mode                         : 4;
+    FuriHalRtcHeapTrackMode heap_track_mode              : 2;
+    FuriHalRtcLocaleUnits locale_units                   : 1;
+    FuriHalRtcLocaleTimeFormat locale_timeformat         : 1;
+    FuriHalRtcLocaleMidnightFormat locale_midnightformat : 1;
+    FuriHalRtcLocaleDateFormat locale_dateformat         : 2;
+    FuriHalRtcLogDevice log_device                       : 2;
+    FuriHalRtcLogBaudRate log_baud_rate                  : 3;
 } SystemReg;
 
 _Static_assert(sizeof(SystemReg) == 4, "SystemReg size mismatch");
@@ -379,6 +379,19 @@ FuriHalRtcLocaleTimeFormat furi_hal_rtc_get_locale_timeformat(void) {
     return data->locale_timeformat;
 }
 
+void furi_hal_rtc_set_locale_midnightformat(FuriHalRtcLocaleMidnightFormat value) {
+    uint32_t data_reg = furi_hal_rtc_get_register(FuriHalRtcRegisterSystem);
+    SystemReg* data = (SystemReg*)&data_reg;
+    data->locale_midnightformat = value;
+    furi_hal_rtc_set_register(FuriHalRtcRegisterSystem, data_reg);
+}
+
+FuriHalRtcLocaleMidnightFormat furi_hal_rtc_get_locale_midnightformat(void) {
+    uint32_t data_reg = furi_hal_rtc_get_register(FuriHalRtcRegisterSystem);
+    SystemReg* data = (SystemReg*)&data_reg;
+    return data->locale_midnightformat;
+}
+
 void furi_hal_rtc_set_locale_dateformat(FuriHalRtcLocaleDateFormat value) {
     uint32_t data_reg = furi_hal_rtc_get_register(FuriHalRtcRegisterSystem);
     SystemReg* data = (SystemReg*)&data_reg;

targets/f7/furi_hal/furi_hal_rtc.h

@@ -65,6 +65,11 @@ typedef enum {
     FuriHalRtcLocaleTimeFormat12h = 0x1, /**< 12-hour format */
 } FuriHalRtcLocaleTimeFormat;
 
+typedef enum {
+    FuriHalRtcLocaleMidnightFormatTwelve = 0x0, /**< 12:XX format */
+    FuriHalRtcLocaleMidnightFormatZero = 0x1, /**< 00:XX format */
+} FuriHalRtcLocaleMidnightFormat;
+
 typedef enum {
     FuriHalRtcLocaleDateFormatDMY = 0x0, /**< Day/Month/Year */
     FuriHalRtcLocaleDateFormatMDY = 0x1, /**< Month/Day/Year */
@@ -231,6 +236,18 @@ void furi_hal_rtc_set_locale_timeformat(FuriHalRtcLocaleTimeFormat value);
  */
 FuriHalRtcLocaleTimeFormat furi_hal_rtc_get_locale_timeformat(void);
 
+/** Set RTC Locale Midnight Format
+ *
+ * @param[in]  value  The RTC Locale Midnight Format
+ */
+void furi_hal_rtc_set_locale_midnightformat(FuriHalRtcLocaleMidnightFormat value);
+
+/** Get RTC Locale Midnight Format
+ *
+ * @return     The RTC Locale Midnight Format.
+ */
+FuriHalRtcLocaleMidnightFormat furi_hal_rtc_get_locale_midnightformat(void);
+
 /** Set RTC Locale Date Format
  *
  * @param[in]  value  The RTC Locale Date Format