Add day_night_percentage_face.

movement/make/Makefile

@@ -118,6 +118,7 @@ SRCS += \
   ../watch_faces/complication/flashlight_face.c \
   ../watch_faces/clock/decimal_time_face.c \
   ../watch_faces/clock/wyoscan_face.c \
+  ../watch_faces/clock/day_night_percentage_face.c \
 # New watch faces go above this line.
 
 # Leave this line at the bottom of the file; it has all the targets for making your project.

movement/movement_faces.h

@@ -95,6 +95,7 @@
 #include "flashlight_face.h"
 #include "decimal_time_face.h"
 #include "wyoscan_face.h"
+#include "day_night_percentage_face.h"
 // New includes go above this line.
 
 #endif // MOVEMENT_FACES_H_

movement/watch_faces/clock/day_night_percentage_face.c

@@ -0,0 +1,116 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Wesley Aptekar-Cassels
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include "day_night_percentage_face.h"
+#include "watch_utility.h"
+#include "sunriset.h"
+
+void day_night_percentage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
+    (void) settings;
+    (void) watch_face_index;
+    (void) context_ptr;
+}
+
+void day_night_percentage_face_activate(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}
+
+// fmod but handle negatives right
+static double better_fmod(double x, double y) {
+    return fmod(fmod(x, y) + y, y);
+}
+
+bool day_night_percentage_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
+    (void) context;
+
+    switch (event.event_type) {
+        case EVENT_ACTIVATE:
+        case EVENT_TICK:
+        case EVENT_LOW_ENERGY_UPDATE:
+            {
+            movement_location_t movement_location = (movement_location_t) watch_get_backup_data(1);
+
+            if (movement_location.reg == 0) {
+                watch_display_string("    no Loc", 0);
+                return true;
+            }
+
+            watch_date_time date_time = watch_rtc_get_date_time(); // the current local date / time
+            watch_date_time utc_now = watch_utility_date_time_convert_zone(date_time, movement_timezone_offsets[settings->bit.time_zone] * 60, 0); // the current date / time in UTC
+
+            // Weird quirky unsigned things were happening when I tried to cast these directly to doubles below.
+            // it looks redundant, but extracting them to local int16's seemed to fix it.
+            int16_t lat_centi = (int16_t)movement_location.bit.latitude;
+            int16_t lon_centi = (int16_t)movement_location.bit.longitude;
+
+            double lat = (double)lat_centi / 100.0;
+            double lon = (double)lon_centi / 100.0;
+
+            double daylen = day_length(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat);
+
+            double rise, set;
+            char buf[12];
+
+            int result = sun_rise_set(utc_now.unit.year + WATCH_RTC_REFERENCE_YEAR, utc_now.unit.month, utc_now.unit.day, lon, lat, &rise, &set);
+
+            if (result != 0) {
+                sprintf(buf, "%s%2dEtrnal", result == 1 ? "DA" : "NI", date_time.unit.day);
+                watch_display_string(buf, 0);
+            } else {
+                double day_hours_decimal = utc_now.unit.hour + (utc_now.unit.minute + (utc_now.unit.second / 60.0)) / 60.0;
+
+                double day_percentage = (24.0 - better_fmod(rise - day_hours_decimal, 24.0)) / daylen;
+                double night_percentage = (24.0 - better_fmod(set - day_hours_decimal, 24.0)) / (24 - daylen);
+
+                if (day_percentage > 0.0 && day_percentage < 1.0) {
+                    uint16_t percentage = day_percentage * 10000;
+                    sprintf(buf, "DA%2d  %04d", date_time.unit.day, percentage);
+                } else {
+                    uint16_t percentage = night_percentage * 10000;
+                    sprintf(buf, "NI%2d  %04d", date_time.unit.day, percentage);
+                }
+                watch_display_string(buf, 0);
+            }
+
+            if (event.event_type == EVENT_LOW_ENERGY_UPDATE) {
+                if (!watch_tick_animation_is_running()) watch_start_tick_animation(500);
+            }
+            break;
+            }
+        default:
+            return movement_default_loop_handler(event, settings);
+    }
+
+    return true;
+}
+
+void day_night_percentage_face_resign(movement_settings_t *settings, void *context) {
+    (void) settings;
+    (void) context;
+}
+

movement/watch_faces/clock/day_night_percentage_face.h

@@ -0,0 +1,61 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2023 Wesley Aptekar-Cassels
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef DAY_NIGHT_PERCENTAGE_FACE_H_
+#define DAY_NIGHT_PERCENTAGE_FACE_H_
+
+#include "movement.h"
+
+/*
+ * Day/night percentage face
+ *
+ * Shows the percentage of the way through the day/night the current time is.
+ *
+ * The weekday digits show "DA" or "NI" depending on whether it's currently day
+ * or night. The day digits show what the current day of the month is. The time
+ * digits show the percentage of the way through the day/night it is, with
+ * decimals in the smaller seconds digits. If the day or night will last for a
+ * full 24 hours, the text "Etrnal" is displayed instead of a percentage.
+ *
+ * This face does not currently offer any configuration. You must set the
+ * location register with some other face.
+ */
+
+typedef struct {} day_night_percentage_state_t;
+
+void day_night_percentage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr);
+void day_night_percentage_face_activate(movement_settings_t *settings, void *context);
+bool day_night_percentage_face_loop(movement_event_t event, movement_settings_t *settings, void *context);
+void day_night_percentage_face_resign(movement_settings_t *settings, void *context);
+
+#define day_night_percentage_face ((const watch_face_t){ \
+    day_night_percentage_face_setup, \
+    day_night_percentage_face_activate, \
+    day_night_percentage_face_loop, \
+    day_night_percentage_face_resign, \
+    NULL, \
+})
+
+#endif // DAY_NIGHT_PERCENTAGE_FACE_H_
+