Fixes #2022, do not resume on Android when surfaceChanged

If the app is in landscape mode and the user presses the power button, a pause is followed immediately by a surfaceChanged event because the lock screen is shown in portrait mode. This triggers a "false" resume. So, we just pause and resume following the onWindowFocusChanged events. Also, wait for SDL_APP_WILLENTERBACKGROUND and SDL_APP_DIDENTERBACKGROUND before blocking the event pump.
2025-12-14 07:36:09 +00:00 · 2013-08-12 11:13:50 -03:00
commit dad420670f
859 changed files with 310893 additions and 0 deletions
--- a/src/power/uikit/SDL_syspower.h
+++ b/src/power/uikit/SDL_syspower.h
@@ -0,0 +1,32 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 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_config.h"
+
+#if SDL_POWER_UIKIT
+
+#include "SDL_power.h"
+
+void SDL_UIKit_UpdateBatteryMonitoring(void);
+SDL_bool SDL_GetPowerInfo_UIKit(SDL_PowerState * state, int *seconds, int *percent);
+
+#endif /* SDL_POWER_UIKIT */
+
+/* vi: set ts=4 sw=4 expandtab: */
--- a/src/power/uikit/SDL_syspower.m
+++ b/src/power/uikit/SDL_syspower.m
@@ -0,0 +1,101 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 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_config.h"
+
+#ifndef SDL_POWER_DISABLED
+#if SDL_POWER_UIKIT
+
+#import <UIKit/UIKit.h>
+
+#include "SDL_power.h"
+#include "SDL_timer.h"
+#include "SDL_assert.h"
+#include "SDL_syspower.h"
+
+/* turn off the battery monitor if it's been more than X ms since last check. */
+static const int BATTERY_MONITORING_TIMEOUT = 3000;
+static Uint32 SDL_UIKitLastPowerInfoQuery = 0;
+
+void
+SDL_UIKit_UpdateBatteryMonitoring(void)
+{
+    if (SDL_UIKitLastPowerInfoQuery) {
+        const Uint32 prev = SDL_UIKitLastPowerInfoQuery;
+        const UInt32 now = SDL_GetTicks();
+        const UInt32 ticks = now - prev;
+        /* if timer wrapped (now < prev), shut down, too. */
+        if ((now < prev) || (ticks >= BATTERY_MONITORING_TIMEOUT)) {
+            UIDevice *uidev = [UIDevice currentDevice];
+            SDL_assert([uidev isBatteryMonitoringEnabled] == YES);
+            [uidev setBatteryMonitoringEnabled:NO];
+            SDL_UIKitLastPowerInfoQuery = 0;
+        }
+    }
+}
+
+SDL_bool
+SDL_GetPowerInfo_UIKit(SDL_PowerState * state, int *seconds, int *percent)
+{
+    UIDevice *uidev = [UIDevice currentDevice];
+
+    if (!SDL_UIKitLastPowerInfoQuery) {
+        SDL_assert([uidev isBatteryMonitoringEnabled] == NO);
+        [uidev setBatteryMonitoringEnabled: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 + 0.5f)) * 100) );
+    return SDL_TRUE;            /* always the definitive answer on iPhoneOS. */
+}
+
+#endif /* SDL_POWER_UIKIT */
+#endif /* SDL_POWER_DISABLED */
+
+/* vi: set ts=4 sw=4 expandtab: */