feat: heart rate indicator

package.json

@@ -74,7 +74,7 @@
           "type": "font",
           "name": "FONT_ICONS_28",
           "file": "fonts/Lilex/LilexNerdFontMono-Regular.ttf",
-          "characterRegex": "[ ]"
+          "characterRegex": "[ ]"
         },
         {
           "type": "font",
@@ -83,7 +83,7 @@
           "targetPlatforms": [
             "emery"
           ],
-          "characterRegex": "[ ]"
+          "characterRegex": "[ ]"
         },
         {
           "type": "font",

src/c/battery.c

@@ -5,6 +5,8 @@
 static TextLayer *s_battery_layer_text;
 static TextLayer *s_battery_layer_icon;
 
+int BATTERY_ROW_MAX_WIDTH = 0;
+
 /**
  * Update battery icon and text.
  */
@@ -34,25 +36,36 @@ void battery_init() {
     battery_state_service_subscribe(battery_update_handler);
 }
 
+// WARNING: Must be called before bluetooth loads.
 void battery_load(Window *window, int row_height) {
     Layer *window_layer = window_get_root_layer(window);
     GRect bounds = layer_get_bounds(window_layer);
 
     // Battery icon.
-    s_battery_layer_icon = font_render_icon_small(window_layer, ICON_BATTERY_50, PADDING_X, 0, true, false);
+    s_battery_layer_icon = font_render_icon_small(window_layer, ICON_BATTERY_100, PADDING_X, 0, true, false);
     text_layer_set_text_color(s_battery_layer_icon, THEME.text_color);
 
     // Battery percentage.
     GRect battery_icon_bounds = layer_get_bounds(text_layer_get_layer(s_battery_layer_icon));
-    s_battery_layer_text =
-        text_layer_create(GRect(battery_icon_bounds.size.w - battery_icon_bounds.size.w, 0,
-                                bounds.size.w - battery_icon_bounds.size.w - PADDING_X - 2, row_height));
+    s_battery_layer_text = text_layer_create(
+        GRect(battery_icon_bounds.size.w - battery_icon_bounds.size.w, 0,
+              bounds.size.w - battery_icon_bounds.size.w - PADDING_X - BATTERY_TEXT_RIGHT_INSET, row_height));
 
     text_layer_set_text_alignment(s_battery_layer_text, GTextAlignmentRight);
     text_layer_set_font(s_battery_layer_text, s_font_primary_small);
     text_layer_set_text_color(s_battery_layer_text, THEME.text_color);
     text_layer_set_background_color(s_battery_layer_text, GColorClear);
     layer_add_child(window_layer, text_layer_get_layer(s_battery_layer_text));
+
+    // Set it to 100 so we can calculate the max width.
+    text_layer_set_text(s_battery_layer_text, "100");
+
+    // Before we call the update handler, calculate the max width of the
+    // battery text + icon.
+    GSize battery_icon_size = text_layer_get_content_size(s_battery_layer_icon);
+    GSize battery_text_size = text_layer_get_content_size(s_battery_layer_text);
+    BATTERY_ROW_MAX_WIDTH = battery_icon_size.w + battery_text_size.w;
+
     battery_update_handler(battery_state_service_peek());
 }
 

src/c/battery.h

@@ -2,6 +2,10 @@
 
 #include <pebble.h>
 
+#define BATTERY_TEXT_RIGHT_INSET 2
+
+extern int BATTERY_ROW_MAX_WIDTH;
+
 void battery_init();
 void battery_load(Window *window, int row_height);
 void battery_unload();

src/c/bluetooth.c

@@ -1,4 +1,6 @@
 #include "bluetooth.h"
+#include "battery.h"
+#include "health.h"
 #include "log.h"
 #include "pebble.h"
 #include "settings.h"
@@ -42,7 +44,8 @@ void bluetooth_deinit(void) {
     connection_service_unsubscribe();
 }
 
-void bluetooth_load(Window *window) {
+static void bluetooth_load_middle_right(Window *window) {
+
     Layer *window_layer = window_get_root_layer(window);
     GRect bounds = layer_get_bounds(window_layer);
 
@@ -55,6 +58,26 @@ void bluetooth_load(Window *window) {
     s_bluetooth_layer_icon =
         font_render_icon_xsmall(window_layer, ICON_BLUETOOTH_CONNECTED, PADDING_X, icon_y, true, false);
     text_layer_set_text_color(s_bluetooth_layer_icon, THEME.text_color);
+}
+
+static void bluetooth_load_top(Window *window) {
+    Layer *window_layer = window_get_root_layer(window);
+
+    int right_offset = PADDING_X + BATTERY_TEXT_RIGHT_INSET + BATTERY_ROW_MAX_WIDTH + 2;
+    int top_offset = 8;
+
+    s_bluetooth_layer_icon =
+        font_render_icon_xsmall(window_layer, ICON_BLUETOOTH_CONNECTED, right_offset, top_offset, true, false);
+    text_layer_set_text_color(s_bluetooth_layer_icon, THEME.text_color);
+}
+
+// WARNING: Must be called after battery loads.
+void bluetooth_load(Window *window) {
+#ifdef HEART_RATE_SUPPORTED
+    bluetooth_load_top(window);
+#else
+    bluetooth_load_middle_right(window);
+#endif
 
     // Refresh state in case the initial peek happened before the service was ready.
     bluetooth_refresh_connected_state();

src/c/font.c

@@ -17,6 +17,7 @@ const char *ICON_BATTERY_50 = "";
 const char *ICON_BATTERY_75 = "";
 const char *ICON_BATTERY_100 = "";
 const char *ICON_STEPS = "";
+const char *ICON_HEART_RATE = "";
 const char *ICON_UTC = "";
 const char *ICON_BLUETOOTH_CONNECTED = "󰂯";
 const char *ICON_SUNRISE = "";

src/c/font.h

@@ -19,6 +19,7 @@ extern const char *ICON_BATTERY_50;
 extern const char *ICON_BATTERY_75;
 extern const char *ICON_BATTERY_100;
 extern const char *ICON_STEPS;
+extern const char *ICON_HEART_RATE;
 extern const char *ICON_UTC;
 extern const char *ICON_BLUETOOTH_CONNECTED;
 extern const char *ICON_SUNRISE;

src/c/health.c

@@ -1,11 +1,28 @@
 #include "health.h"
 #include "common.h"
 #include "font.h"
+#include "settings.h"
+#include "time.h"
 
-TextLayer *s_steps_layer_text;
-TextLayer *s_steps_layer_icon;
+static TextLayer *s_steps_layer_text;
+static TextLayer *s_steps_layer_icon;
+
+#if defined(HEART_RATE_SUPPORTED)
+static TextLayer *s_heart_rate_layer_text;
+static TextLayer *s_heart_rate_layer_icon;
+
+#if defined(PBL_PLATFORM_EMERY)
+static const int HEART_RATE_Y_OFFSET = 9;
+#else
+static const int HEART_RATE_Y_OFFSET = 0;
+#endif
+#endif
+
+static void health_update_steps(void) {
+    if (!s_steps_layer_text) {
+        return;
+    }
 
-static void health_update(void) {
     static char steps_buffer[16];
 
     HealthServiceAccessibilityMask access =
@@ -20,9 +37,43 @@ static void health_update(void) {
     text_layer_set_text(s_steps_layer_text, steps_buffer);
 }
 
+static void health_update_heart_rate(void) {
+#if defined(HEART_RATE_SUPPORTED)
+    if (!s_heart_rate_layer_text) {
+        return;
+    }
+
+    static char heart_rate_buffer[16];
+
+    HealthServiceAccessibilityMask access = health_service_metric_aggregate_averaged_accessible(
+        HealthMetricHeartRateBPM, time(NULL), time(NULL), HealthAggregationAvg, HealthServiceTimeScopeOnce);
+    if (access & HealthServiceAccessibilityMaskAvailable) {
+        HealthValue heart_rate = health_service_peek_current_value(HealthMetricHeartRateBPM);
+        if (heart_rate > 0) {
+            snprintf(heart_rate_buffer, sizeof(heart_rate_buffer), "%ld", (long)heart_rate);
+        } else {
+            snprintf(heart_rate_buffer, sizeof(heart_rate_buffer), "--");
+        }
+    } else {
+        snprintf(heart_rate_buffer, sizeof(heart_rate_buffer), "--");
+    }
+
+    text_layer_set_text(s_heart_rate_layer_text, heart_rate_buffer);
+#endif
+}
+
+static void health_update(void) {
+    health_update_steps();
+    health_update_heart_rate();
+}
+
 static void health_handler(HealthEventType event, void *context) {
     if (event == HealthEventMovementUpdate || event == HealthEventSignificantUpdate) {
-        health_update();
+        health_update_steps();
+    }
+
+    if (event == HealthEventHeartRateUpdate || event == HealthEventSignificantUpdate) {
+        health_update_heart_rate();
     }
 }
 
@@ -35,23 +86,69 @@ void health_load(Window *window, int row_height) {
     Layer *window_layer = window_get_root_layer(window);
     GRect bounds = layer_get_bounds(window_layer);
 
-    int steps_y = row_height + 2;
-    s_steps_layer_icon = font_render_icon_small(window_layer, ICON_STEPS, PADDING_X, steps_y, true, false);
-    text_layer_set_text_color(s_steps_layer_icon, THEME.text_color);
-    GRect steps_icon_bounds = layer_get_bounds(text_layer_get_layer(s_steps_layer_icon));
+    // --- Steps ---
+
+    if (app_settings.show_steps) {
+        int steps_y = row_height + 2;
+        s_steps_layer_icon = font_render_icon_small(window_layer, ICON_STEPS, PADDING_X, steps_y, true, false);
+        text_layer_set_text_color(s_steps_layer_icon, THEME.text_color);
+        GRect steps_icon_bounds = layer_get_bounds(text_layer_get_layer(s_steps_layer_icon));
+
+        s_steps_layer_text =
+            text_layer_create(GRect(0, steps_y, bounds.size.w - steps_icon_bounds.size.w - PADDING_X - 2, row_height));
+        text_layer_set_text_alignment(s_steps_layer_text, GTextAlignmentRight);
+        text_layer_set_font(s_steps_layer_text, s_font_primary_small);
+        text_layer_set_text_color(s_steps_layer_text, THEME.text_color);
+        text_layer_set_background_color(s_steps_layer_text, GColorClear);
+        layer_add_child(window_layer, text_layer_get_layer(s_steps_layer_text));
+    }
+
+    // --- Heart Rate ---
+
+#if defined(HEART_RATE_SUPPORTED)
+#if defined(PBL_PLATFORM_EMERY)
+    int heart_rate_y = (bounds.size.h / 2) - (TIME_CONTAINER_HEIGHT / 2) - 20 - HEART_RATE_Y_OFFSET;
+#else
+    int heart_rate_y = (bounds.size.h / 2) - (TIME_CONTAINER_HEIGHT / 2) - 14 - HEART_RATE_Y_OFFSET;
+#endif
+    s_heart_rate_layer_icon =
+        font_render_icon_small(window_layer, ICON_HEART_RATE, PADDING_X, heart_rate_y, true, false);
+    text_layer_set_text_color(s_heart_rate_layer_icon, THEME.text_color);
+    GRect heart_rate_icon_bounds = layer_get_bounds(text_layer_get_layer(s_heart_rate_layer_icon));
 
-    s_steps_layer_text = text_layer_create(GRect(steps_icon_bounds.size.w - steps_icon_bounds.size.w, steps_y,
-                                                 bounds.size.w - steps_icon_bounds.size.w - PADDING_X - 2, row_height));
-    text_layer_set_text_alignment(s_steps_layer_text, GTextAlignmentRight);
-    text_layer_set_font(s_steps_layer_text, s_font_primary_small);
-    text_layer_set_text_color(s_steps_layer_text, THEME.text_color);
-    text_layer_set_background_color(s_steps_layer_text, GColorClear);
-    layer_add_child(window_layer, text_layer_get_layer(s_steps_layer_text));
+    s_heart_rate_layer_text = text_layer_create(
+        GRect(0, heart_rate_y, bounds.size.w - heart_rate_icon_bounds.size.w - PADDING_X - 2, row_height));
+    text_layer_set_text_alignment(s_heart_rate_layer_text, GTextAlignmentRight);
+    text_layer_set_font(s_heart_rate_layer_text, s_font_primary_small);
+    text_layer_set_text_color(s_heart_rate_layer_text, THEME.text_color);
+    text_layer_set_background_color(s_heart_rate_layer_text, GColorClear);
+    layer_add_child(window_layer, text_layer_get_layer(s_heart_rate_layer_text));
+#endif
+
+    health_update();
 }
 
 void health_unload() {
-    text_layer_destroy(s_steps_layer_icon);
-    text_layer_destroy(s_steps_layer_text);
+    if (s_steps_layer_icon) {
+        text_layer_destroy(s_steps_layer_icon);
+        s_steps_layer_icon = NULL;
+    }
+
+    if (s_steps_layer_text) {
+        text_layer_destroy(s_steps_layer_text);
+        s_steps_layer_text = NULL;
+    }
+#if defined(HEART_RATE_SUPPORTED)
+    if (s_heart_rate_layer_icon) {
+        text_layer_destroy(s_heart_rate_layer_icon);
+        s_heart_rate_layer_icon = NULL;
+    }
+
+    if (s_heart_rate_layer_text) {
+        text_layer_destroy(s_heart_rate_layer_text);
+        s_heart_rate_layer_text = NULL;
+    }
+#endif
 }
 
 void health_deinit() {

src/c/health.h

@@ -2,6 +2,10 @@
 
 #include <pebble.h>
 
+#if defined(PBL_PLATFORM_DIORITE) || defined(PBL_PLATFORM_EMERY)
+#define HEART_RATE_SUPPORTED
+#endif
+
 void health_init();
 void health_load(Window *window, int row_height);
 void health_unload();

src/c/main.c

@@ -16,6 +16,16 @@
 
 static int s_last_vibrate_hour = -1;
 
+#if defined(PBL_HEALTH)
+static bool health_should_run(void) {
+#if defined(HEART_RATE_SUPPORTED)
+    return true;
+#else
+    return app_settings.show_steps;
+#endif
+}
+#endif
+
 static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
     LOG_DEBUG("tick handler...");
     time_update();
@@ -36,7 +46,7 @@ void load_top_right(Window *window) {
 #endif
     battery_load(window, row_height);
 #if defined(PBL_HEALTH)
-    if (app_settings.show_steps) {
+    if (health_should_run()) {
         health_load(window, row_height);
     }
 #endif
@@ -59,7 +69,7 @@ static void window_unload(Window *window) {
     bluetooth_unload();
     battery_unload();
 #if defined(PBL_HEALTH)
-    if (app_settings.show_steps) {
+    if (health_should_run()) {
         health_unload();
     }
 #endif
@@ -80,7 +90,7 @@ static void init(void) {
     battery_init();
     bluetooth_init();
 #if defined(PBL_HEALTH)
-    if (app_settings.show_steps) {
+    if (health_should_run()) {
         health_init();
     }
 #endif
@@ -92,7 +102,7 @@ static void deinit(void) {
     bluetooth_deinit();
     battery_deinit();
 #if defined(PBL_HEALTH)
-    if (app_settings.show_steps) {
+    if (health_should_run()) {
         health_deinit();
     }
 #endif