From 167adc0a2b4a940cae6c9eb71f3185b5d2d3b4fa Mon Sep 17 00:00:00 2001
From: Jan Palus <atler@pld-linux.org>
Date: Fri, 23 Oct 2020 00:59:26 +0200
Subject: [PATCH] Parse POWER_SUPPLY_CAPACITY

If POWER_SUPPLY_{CHARGE,ENERGY}_NOW is missing then try to use
POWER_SUPPLY_CAPACITY to determine current charge level.
---
 linux/Battery.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/linux/Battery.c b/linux/Battery.c
index 4eab24dd..0822ee9a 100644
--- a/linux/Battery.c
+++ b/linux/Battery.c
@@ -230,6 +230,8 @@ static void Battery_getSysData(double* level, ACPresence* isOnAC) {
          char *line = NULL;
          bool full = false;
          bool now = false;
+         int fullSize = 0;
+         double capacityLevel = NAN;
          while ((line = strsep(&buf, "\n")) != NULL) {
    #define match(str,prefix) \
            (String_startsWith(str,prefix) ? (str) + strlen(prefix) : NULL)
@@ -237,6 +239,10 @@ static void Battery_getSysData(double* level, ACPresence* isOnAC) {
             if (!ps) {
                continue;
             }
+            const char* capacity = match(ps, "CAPACITY=");
+            if (capacity) {
+               capacityLevel = atoi(capacity) / 100.0;
+            }
             const char* energy = match(ps, "ENERGY_");
             if (!energy) {
                energy = match(ps, "CHARGE_");
@@ -246,7 +252,8 @@ static void Battery_getSysData(double* level, ACPresence* isOnAC) {
             }
             const char* value = (!full) ? match(energy, "FULL=") : NULL;
             if (value) {
-               totalFull += atoi(value);
+               fullSize = atoi(value);
+               totalFull += fullSize;
                full = true;
                if (now) break;
                continue;
@@ -260,6 +267,9 @@ static void Battery_getSysData(double* level, ACPresence* isOnAC) {
             }
          }
    #undef match
+         if (!now && full && !isnan(capacityLevel)) {
+            totalRemain += (capacityLevel * fullSize);
+         }
       } else if (entryName[0] == 'A') {
          if (*isOnAC != AC_ERROR) {
             continue;