Add Device Power State (Windows, Linux, Mac and Android) (#197)

Uses native power state methods to display battery percentage and charging state correctly. Mainly for qlaunch.
Tested on Windows, Linux. Mac and Android

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/197
Co-authored-by: Maufeat <sahyno1996@gmail.com>
Co-committed-by: Maufeat <sahyno1996@gmail.com>

src/common/CMakeLists.txt

@@ -42,6 +42,8 @@ add_library(common STATIC
     demangle.h
     detached_tasks.cpp
     detached_tasks.h
+    device_power_state.cpp
+    device_power_state.h
     div_ceil.h
     dynamic_library.cpp
     dynamic_library.h

src/common/device_power_state.cpp

@@ -0,0 +1,102 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "device_power_state.h"
+
+#if defined(_WIN32)
+#include <windows.h>
+
+#elif defined(__ANDROID__)
+#include <atomic>
+extern std::atomic<int> g_battery_percentage;
+extern std::atomic<bool> g_is_charging;
+extern std::atomic<bool> g_has_battery;
+
+#elif defined(__APPLE__)
+#include <TargetConditionals.h>
+#if TARGET_OS_MAC
+#include <IOKit/ps/IOPSKeys.h>
+#include <IOKit/ps/IOPowerSources.h>
+#endif
+
+#elif defined(__linux__)
+#include <fstream>
+#include <string>
+#include <dirent.h>
+#endif
+
+namespace Common {
+
+    PowerStatus GetPowerStatus()
+    {
+        PowerStatus info;
+
+#if defined(_WIN32)
+        SYSTEM_POWER_STATUS status;
+        if (GetSystemPowerStatus(&status)) {
+            if (status.BatteryFlag == 128) {
+                info.has_battery = false;
+            } else {
+                info.percentage = status.BatteryLifePercent;
+                info.charging = (status.BatteryFlag & 8) != 0;
+            }
+        } else {
+            info.has_battery = false;
+        }
+
+#elif defined(__ANDROID__)
+        info.percentage = g_battery_percentage.load(std::memory_order_relaxed);
+        info.charging = g_is_charging.load(std::memory_order_relaxed);
+        info.has_battery = g_has_battery.load(std::memory_order_relaxed);
+
+#elif defined(__APPLE__) && TARGET_OS_MAC
+        CFTypeRef info_ref = IOPSCopyPowerSourcesInfo();
+        CFArrayRef sources = IOPSCopyPowerSourcesList(info_ref);
+        if (CFArrayGetCount(sources) > 0) {
+            CFDictionaryRef battery =
+                IOPSGetPowerSourceDescription(info_ref, CFArrayGetValueAtIndex(sources, 0));
+
+            CFNumberRef curNum =
+                (CFNumberRef)CFDictionaryGetValue(battery, CFSTR(kIOPSCurrentCapacityKey));
+            CFNumberRef maxNum =
+                (CFNumberRef)CFDictionaryGetValue(battery, CFSTR(kIOPSMaxCapacityKey));
+            int cur = 0, max = 0;
+            CFNumberGetValue(curNum, kCFNumberIntType, &cur);
+            CFNumberGetValue(maxNum, kCFNumberIntType, &max);
+
+            if (max > 0)
+                info.percentage = (cur * 100) / max;
+
+            CFBooleanRef isCharging =
+                (CFBooleanRef)CFDictionaryGetValue(battery, CFSTR(kIOPSIsChargingKey));
+            info.charging = CFBooleanGetValue(isCharging);
+        } else {
+            info.has_battery = false;
+        }
+        CFRelease(sources);
+        CFRelease(info_ref);
+
+#elif defined(__linux__)
+        const char* battery_path = "/sys/class/power_supply/BAT0/";
+
+        std::ifstream capFile(std::string(battery_path) + "capacity");
+        if (capFile) {
+            capFile >> info.percentage;
+        }
+        else {
+            info.has_battery = false;
+        }
+
+        std::ifstream statFile(std::string(battery_path) + "status");
+        if (statFile) {
+            std::string status;
+            std::getline(statFile, status);
+            info.charging = (status == "Charging");
+        }
+#else
+        info.has_battery = false;
+#endif
+
+        return info;
+    }
+}

src/common/device_power_state.h

@@ -0,0 +1,14 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+namespace Common {
+struct PowerStatus {
+    int percentage = -1;
+    bool charging = false;
+    bool has_battery = true;
+};
+
+PowerStatus GetPowerStatus();
+} // namespace Common