/*+
−
    SDL - Simple DirectMedia Layer+
−
    Copyright (C) 1997-2009 Sam Lantinga+
−
+
−
    This library is free software; you can redistribute it and/or+
−
    modify it under the terms of the GNU Lesser General Public+
−
    License as published by the Free Software Foundation; either+
−
    version 2.1 of the License, or (at your option) any later version.+
−
+
−
    This library is distributed in the hope that it will be useful,+
−
    but WITHOUT ANY WARRANTY; without even the implied warranty of+
−
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU+
−
    Lesser General Public License for more details.+
−
+
−
    You should have received a copy of the GNU Lesser General Public+
−
    License along with this library; if not, write to the Free Software+
−
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA+
−
+
−
    Sam Lantinga+
−
    slouken@libsdl.org+
−
*/+
−
#include "SDL_config.h"+
−
+
−
#ifndef SDL_POWER_DISABLED+
−
#ifdef SDL_POWER_MACOSX+
−
+
−
#include <Carbon/Carbon.h>+
−
#include <IOKit/ps/IOPowerSources.h>+
−
#include <IOKit/ps/IOPSKeys.h>+
−
+
−
#include "SDL_power.h"+
−
+
−
/* Carbon is so verbose... */+
−
#define STRMATCH(a,b) (CFStringCompare(a, b, 0) == kCFCompareEqualTo)+
−
#define GETVAL(k,v) \+
−
    CFDictionaryGetValueIfPresent(dict, CFSTR(k), (const void **) v)+
−
+
−
/* Note that AC power sources also include a laptop battery it is charging. */+
−
static void+
−
checkps(CFDictionaryRef dict, SDL_bool * have_ac, SDL_bool * have_battery,+
−
        SDL_bool * charging, int *seconds, int *percent)+
−
{+
−
    CFStringRef strval;         /* don't CFRelease() this. */+
−
    CFBooleanRef bval;+
−
    CFNumberRef numval;+
−
    SDL_bool charge = SDL_FALSE;+
−
    SDL_bool choose = SDL_FALSE;+
−
    SDL_bool is_ac = SDL_FALSE;+
−
    int secs = -1;+
−
    int maxpct = -1;+
−
    int pct = -1;+
−
+
−
    if ((GETVAL(kIOPSIsPresentKey, &bval)) && (bval == kCFBooleanFalse)) {+
−
        return;                 /* nothing to see here. */+
−
    }+
−
+
−
    if (!GETVAL(kIOPSPowerSourceStateKey, &strval)) {+
−
        return;+
−
    }+
−
+
−
    if (STRMATCH(strval, CFSTR(kIOPSACPowerValue))) {+
−
        is_ac = *have_ac = SDL_TRUE;+
−
    } else if (!STRMATCH(strval, CFSTR(kIOPSBatteryPowerValue))) {+
−
        return;                 /* not a battery? */+
−
    }+
−
+
−
    if ((GETVAL(kIOPSIsChargingKey, &bval)) && (bval == kCFBooleanTrue)) {+
−
        charge = SDL_TRUE;+
−
    }+
−
+
−
    if (GETVAL(kIOPSMaxCapacityKey, &numval)) {+
−
        SInt32 val = -1;+
−
        CFNumberGetValue(numval, kCFNumberSInt32Type, &val);+
−
        if (val > 0) {+
−
            *have_battery = SDL_TRUE;+
−
            maxpct = (int) val;+
−
        }+
−
    }+
−
+
−
    if (GETVAL(kIOPSMaxCapacityKey, &numval)) {+
−
        SInt32 val = -1;+
−
        CFNumberGetValue(numval, kCFNumberSInt32Type, &val);+
−
        if (val > 0) {+
−
            *have_battery = SDL_TRUE;+
−
            maxpct = (int) val;+
−
        }+
−
    }+
−
+
−
    if (GETVAL(kIOPSTimeToEmptyKey, &numval)) {+
−
        SInt32 val = -1;+
−
        CFNumberGetValue(numval, kCFNumberSInt32Type, &val);+
−
+
−
        /* Mac OS X reports 0 minutes until empty if you're plugged in. :( */+
−
        if ((val == 0) && (is_ac)) {+
−
            val = -1;           /* !!! FIXME: calc from timeToFull and capacity? */+
−
        }+
−
+
−
        secs = (int) val;+
−
        if (secs > 0) {+
−
            secs *= 60;         /* value is in minutes, so convert to seconds. */+
−
        }+
−
    }+
−
+
−
    if (GETVAL(kIOPSCurrentCapacityKey, &numval)) {+
−
        SInt32 val = -1;+
−
        CFNumberGetValue(numval, kCFNumberSInt32Type, &val);+
−
        pct = (int) val;+
−
    }+
−
+
−
    if ((pct > 0) && (maxpct > 0)) {+
−
        pct = (int) ((((double) pct) / ((double) maxpct)) * 100.0);+
−
    }+
−
+
−
    if (pct > 100) {+
−
        pct = 100;+
−
    }+
−
+
−
    /*+
−
     * We pick the battery that claims to have the most minutes left.+
−
     *  (failing a report of minutes, we'll take the highest percent.)+
−
     */+
−
    if ((secs < 0) && (*seconds < 0)) {+
−
        if ((pct < 0) && (*percent < 0)) {+
−
            choose = SDL_TRUE;  /* at least we know there's a battery. */+
−
        }+
−
        if (pct > *percent) {+
−
            choose = SDL_TRUE;+
−
        }+
−
    } else if (secs > *seconds) {+
−
        choose = SDL_TRUE;+
−
    }+
−
+
−
    if (choose) {+
−
        *seconds = secs;+
−
        *percent = pct;+
−
        *charging = charge;+
−
    }+
−
}+
−
+
−
#undef GETVAL+
−
#undef STRMATCH+
−
+
−
+
−
SDL_bool+
−
SDL_GetPowerInfo_MacOSX(SDL_PowerState * state, int *seconds, int *percent)+
−
{+
−
    CFTypeRef blob = IOPSCopyPowerSourcesInfo();+
−
+
−
    *seconds = -1;+
−
    *percent = -1;+
−
    *state = SDL_POWERSTATE_UNKNOWN;+
−
+
−
    if (blob != NULL) {+
−
        CFArrayRef list = IOPSCopyPowerSourcesList(blob);+
−
        if (list != NULL) {+
−
            /* don't CFRelease() the list items, or dictionaries! */+
−
            SDL_bool have_ac = SDL_FALSE;+
−
            SDL_bool have_battery = SDL_FALSE;+
−
            SDL_bool charging = SDL_FALSE;+
−
            const CFIndex total = CFArrayGetCount(list);+
−
            CFIndex i;+
−
            for (i = 0; i < total; i++) {+
−
                CFTypeRef ps = (CFTypeRef) CFArrayGetValueAtIndex(list, i);+
−
                CFDictionaryRef dict =+
−
                    IOPSGetPowerSourceDescription(blob, ps);+
−
                if (dict != NULL) {+
−
                    checkps(dict, &have_ac, &have_battery, &charging,+
−
                            seconds, percent);+
−
                }+
−
            }+
−
+
−
            if (!have_battery) {+
−
                *state = SDL_POWERSTATE_NO_BATTERY;+
−
            } else if (charging) {+
−
                *state = SDL_POWERSTATE_CHARGING;+
−
            } else if (have_ac) {+
−
                *state = SDL_POWERSTATE_CHARGED;+
−
            } else {+
−
                *state = SDL_POWERSTATE_ON_BATTERY;+
−
            }+
−
+
−
            CFRelease(list);+
−
        }+
−
        CFRelease(blob);+
−
    }+
−
+
−
    return SDL_TRUE;            /* always the definitive answer on Mac OS X. */+
−
}+
−
+
−
#endif /* SDL_POWER_MACOSX */+
−
#endif /* SDL_POWER_DISABLED */+
−
+
−
/* vi: set ts=4 sw=4 expandtab: */+
−