From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 27 Dec 2025 12:03:39 -0800
Subject: Initial commit

---
 contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m | 105 +++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m

(limited to 'contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m')

diff --git a/contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m b/contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m
new file mode 100644
index 0000000..561f2de
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/power/uikit/SDL_syspower.m
@@ -0,0 +1,105 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_internal.h"
+
+#ifndef SDL_POWER_DISABLED
+#ifdef SDL_POWER_UIKIT
+
+#import <UIKit/UIKit.h>
+
+#include "SDL_syspower.h"
+
+#ifndef SDL_PLATFORM_TVOS
+// turn off the battery monitor if it's been more than X ms since last check.
+static const int BATTERY_MONITORING_TIMEOUT = 3000;
+static Uint64 SDL_UIKitLastPowerInfoQuery = 0;
+
+void SDL_UIKit_UpdateBatteryMonitoring(void)
+{
+    if (SDL_UIKitLastPowerInfoQuery) {
+        if (SDL_GetTicks() >= (SDL_UIKitLastPowerInfoQuery + BATTERY_MONITORING_TIMEOUT)) {
+            UIDevice *uidev = [UIDevice currentDevice];
+            SDL_assert([uidev isBatteryMonitoringEnabled] == YES);
+            [uidev setBatteryMonitoringEnabled:NO];
+            SDL_UIKitLastPowerInfoQuery = 0;
+        }
+    }
+}
+#else
+void SDL_UIKit_UpdateBatteryMonitoring(void)
+{
+    // Do nothing.
+}
+#endif // !SDL_PLATFORM_TVOS
+
+bool SDL_GetPowerInfo_UIKit(SDL_PowerState *state, int *seconds, int *percent)
+{
+#ifdef SDL_PLATFORM_TVOS
+    *state = SDL_POWERSTATE_NO_BATTERY;
+    *seconds = -1;
+    *percent = -1;
+#else  // SDL_PLATFORM_TVOS
+    @autoreleasepool {
+        UIDevice *uidev = [UIDevice currentDevice];
+
+        if (!SDL_UIKitLastPowerInfoQuery) {
+            SDL_assert(uidev.isBatteryMonitoringEnabled == NO);
+            uidev.batteryMonitoringEnabled = YES;
+        }
+
+        /* UIKit_GL_SwapWindow() (etc) will check this and disable the battery
+         *  monitoring if the app hasn't queried it in the last X seconds.
+         *  Apparently monitoring the battery burns battery life.  :)
+         *  Apple's docs say not to monitor the battery unless you need it.
+         */
+        SDL_UIKitLastPowerInfoQuery = SDL_GetTicks();
+
+        *seconds = -1; // no API to estimate this in UIKit.
+
+        switch (uidev.batteryState) {
+        case UIDeviceBatteryStateCharging:
+            *state = SDL_POWERSTATE_CHARGING;
+            break;
+
+        case UIDeviceBatteryStateFull:
+            *state = SDL_POWERSTATE_CHARGED;
+            break;
+
+        case UIDeviceBatteryStateUnplugged:
+            *state = SDL_POWERSTATE_ON_BATTERY;
+            break;
+
+        case UIDeviceBatteryStateUnknown:
+        default:
+            *state = SDL_POWERSTATE_UNKNOWN;
+            break;
+        }
+
+        const float level = uidev.batteryLevel;
+        *percent = ((level < 0.0f) ? -1 : ((int)((level * 100) + 0.5f)));
+    }
+#endif // SDL_PLATFORM_TVOS
+
+    return true; // always the definitive answer on iOS.
+}
+
+#endif // SDL_POWER_UIKIT
+#endif // SDL_POWER_DISABLED
-- 
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