Add system dark mode

src/fw/shell/normal/prefs.c

@@ -101,7 +101,7 @@ static uint32_t s_dynamic_backlight_min_threshold = 0; // default set from board
 #if CAPABILITY_HAS_ORIENTATION_MANAGER
 #define PREF_KEY_DISPLAY_ORIENTATION_LEFT_HANDED "displayOrientationLeftHanded"
 static bool s_display_orientation_left = false;
-#endif 
+#endif
 
 #define PREF_KEY_BACKLIGHT_AMBIENT_THRESHOLD "lightAmbientThreshold"
 static uint32_t s_backlight_ambient_threshold = 0; // default set from board config in shell_prefs_init()
@@ -249,11 +249,13 @@ static GColor s_theme_highlight_color = GColorVividCerulean;
 #define PREF_KEY_MENU_SCROLL_VIBE_BEHAVIOR "menuScrollVibeBehavior"
 #define PREF_KEY_MUSIC_SHOW_VOLUME_CONTROLS "musicShowVolumeControls"
 #define PREF_KEY_MUSIC_SHOW_PROGRESS_BAR "musicShowProgressBar"
+#define PREF_KEY_DARK_MODE "darkMode"
 
 static bool s_menu_scroll_wrap_around = false;
 static MenuScrollVibeBehavior s_menu_scroll_vibe_behavior = MenuScrollNoVibe;
 static bool s_music_show_volume_controls = true;
 static bool s_music_show_progress_bar = true;
+static uint8_t s_dark_mode = DarkModeOff;
 
 // ============================================================================================
 // Handlers for each pref that validate the new setting and store the new value in our globals.
@@ -391,13 +393,13 @@ static bool prv_set_s_motion_sensitivity(uint8_t *sensitivity) {
     return false;
   }
   s_motion_sensitivity = *sensitivity;
-  
+
   // Update accelerometer sensitivity in accel_manager
   // This applies the setting to the hardware
   #if CAPABILITY_HAS_ACCEL_SENSITIVITY
   accel_manager_update_sensitivity(*sensitivity);
   #endif
-  
+
   return true;
 }
 
@@ -745,7 +747,16 @@ static bool prv_set_s_music_show_progress_bar(bool *enabled) {
   s_music_show_progress_bar = *enabled;
   return true;
 }
-
+
+static bool prv_set_s_dark_mode(uint8_t *mode) {
+  if (*mode >= DarkModeCount) {
+    s_dark_mode = DarkModeOn;
+    return false;
+  }
+  s_dark_mode = *mode;
+  return true;
+}
+
 // ------------------------------------------------------------------------------------
 // Table of all prefs
 typedef bool (*PrefSetHandler)(const void *value, size_t val_len);
@@ -830,10 +841,10 @@ void shell_prefs_init(void) {
   }
 
   settings_file_close(&file);
-  
+
   // Update the ambient light driver with the loaded threshold value
   ambient_light_set_dark_threshold(s_backlight_ambient_threshold);
-  
+
   // Initialize prefs sync (must be after prefs are loaded)
   prefs_sync_init();
 
@@ -1854,3 +1865,12 @@ bool shell_prefs_get_music_show_progress_bar(void) {
 void shell_prefs_set_music_show_progress_bar(bool enable) {
   prv_pref_set(PREF_KEY_MUSIC_SHOW_PROGRESS_BAR, &enable, sizeof(enable));
 }
+
+DarkMode shell_prefs_get_dark_mode(void) {
+  return (DarkMode)s_dark_mode;
+}
+
+void shell_prefs_set_dark_mode(DarkMode mode) {
+  uint8_t val = (uint8_t)mode;
+  prv_pref_set(PREF_KEY_DARK_MODE, &val, sizeof(val));
+}

src/fw/shell/normal/prefs_values.h.inc

@@ -70,3 +70,4 @@
   PREFS_MACRO(PREF_KEY_MENU_SCROLL_VIBE_BEHAVIOR, s_menu_scroll_vibe_behavior)
   PREFS_MACRO(PREF_KEY_MUSIC_SHOW_VOLUME_CONTROLS, s_music_show_volume_controls)
   PREFS_MACRO(PREF_KEY_MUSIC_SHOW_PROGRESS_BAR, s_music_show_progress_bar)
+  PREFS_MACRO(PREF_KEY_DARK_MODE, s_dark_mode)

src/fw/shell/prefs.h

@@ -209,3 +209,15 @@ void shell_prefs_set_music_show_volume_controls(bool enable);
 
 bool shell_prefs_get_music_show_progress_bar(void);
 void shell_prefs_set_music_show_progress_bar(bool enable);
+
+typedef enum DarkMode {
+  DarkModeOff = 0,
+  DarkModeOn = 1,
+#if CAPABILITY_HAS_AMBIENT_LIGHT_SENSOR
+  DarkModeAuto = 2,  // Follows the ambient light sensor; dark mode when ambient light is low
+#endif
+  DarkModeCount
+} DarkMode;
+
+DarkMode shell_prefs_get_dark_mode(void);
+void shell_prefs_set_dark_mode(DarkMode mode);

src/fw/shell/prf/stubs.c

@@ -252,6 +252,17 @@ void shell_prefs_set_language_english(bool english) {
 void shell_prefs_toggle_language_english(void) {
 }
 
+GColor shell_prefs_get_theme_highlight_color(void) {
+  return PBL_IF_COLOR_ELSE(GColorVividCerulean, GColorBlack);
+}
+
+DarkMode shell_prefs_get_dark_mode(void) {
+  return DarkModeOff;
+}
+
+void shell_prefs_set_dark_mode(DarkMode mode) {
+}
+
 FontInfo *fonts_get_system_emoji_font_for_size(unsigned int font_height) {
   return NULL;
 }

src/fw/shell/sdk/prefs.c

@@ -294,6 +294,14 @@ void shell_prefs_set_theme_highlight_color(GColor color) {
   // Not used in SDK shell
 }
 
+DarkMode shell_prefs_get_dark_mode(void) {
+  return DarkModeOff;
+}
+
+void shell_prefs_set_dark_mode(DarkMode mode) {
+  // Not used in SDK shell
+}
+
 #if CAPABILITY_HAS_APP_SCALING
 LegacyAppRenderMode shell_prefs_get_legacy_app_render_mode(void) {
   return (LegacyAppRenderMode)s_legacy_app_render_mode;

tests/stubs/stubs_shell_prefs.h

@@ -74,6 +74,14 @@ void WEAK shell_prefs_set_menu_scroll_wrap_around_enable(bool enable) {
   s_menu_scroll_enable = enable;
 }
 
+GColor WEAK shell_prefs_get_theme_highlight_color(void) {
+  return PBL_IF_COLOR_ELSE(GColorVividCerulean, GColorBlack);
+}
+
+DarkMode WEAK shell_prefs_get_dark_mode(void) {
+  return DarkModeOff;
+}
+
 static MenuScrollVibeBehavior s_menu_scroll_vibe_behavior = MenuScrollNoVibe;
 
 MenuScrollVibeBehavior WEAK shell_prefs_get_menu_scroll_vibe_behavior(void) {