/*

     File: main.m

 Abstract: Application main.

  Version: 1.1

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 */

#import <Cocoa/Cocoa.h>

#import "LogManager.h"

static void WaitForWindowServerSession(void)

    // This routine waits for the window server to register its per-session 

    // services in our session.  This code was necessary in various pre-release 

    // versions of Mac OS X 10.5, but it is not necessary on the final version. 

    // However, I've left it in, and the option to enable it, to give me the 

    // flexibility to test this edge case.

{

    [[LogManager sharedManager] logWithFormat:@"Waiting for window server session begin"];

    do {

        NSDictionary *  sessionDict;

        sessionDict = CFBridgingRelease( CGSessionCopyCurrentDictionary() );

        if (sessionDict != nil) {

            break;

        }

        [[LogManager sharedManager] logWithFormat:@"No window server session, wait"];

        sleep(1);

    } while (YES);

    [[LogManager sharedManager] logWithFormat:@"Waiting for window server session end"];

}

static void InstallHandleSIGTERMFromRunLoop(void)

    // This routine installs a SIGTERM handler that's called on the main thread, allowing 

    // it to then call into Cocoa to quit the app.

{

    static dispatch_once_t   sOnceToken;

    static dispatch_source_t sSignalSource;

    dispatch_once(&sOnceToken, ^{

        signal(SIGTERM, SIG_IGN);

        sSignalSource = dispatch_source_create(DISPATCH_SOURCE_TYPE_SIGNAL, SIGTERM, 0, dispatch_get_main_queue());

        assert(sSignalSource != NULL);

        dispatch_source_set_event_handler(sSignalSource, ^{

            assert([NSThread isMainThread]);

            [[LogManager sharedManager] logWithFormat:@"Got SIGTERM"];

            [[NSApplication sharedApplication] terminate:nil];

        });

        dispatch_resume(sSignalSource);

    });

}

int main(int argc, char *argv[])

{

    int             retVal;

    NSTimeInterval  delay;

    [[LogManager sharedManager] logWithFormat:@"Start"];

    // Register the default defaults, so to speak.

    [[NSUserDefaults standardUserDefaults] registerDefaults:@{

        @"DelayStartup":               @0.0, 

        @"WaitForWindowServerSession": @NO,

        @"ForceOrderFront":            @YES,

        @"CleanExit":                  @YES

    }];

    // Handle various options startup options.

    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"WaitForWindowServerSession"]) {

        WaitForWindowServerSession();

    } else {

        [[LogManager sharedManager] logWithFormat:@"Not waiting for CGSessionCopyCurrentDictionary"];

    }

    delay = [[NSUserDefaults standardUserDefaults] doubleForKey:@"DelayStartup"];

    if (delay > 0.0) {

        [[LogManager sharedManager] logWithFormat:@"Delaying %.1f", delay];

        [NSThread sleepForTimeInterval:delay];

    } else {

        [[LogManager sharedManager] logWithFormat:@"Not delaying"];

    }

    if ([[NSUserDefaults standardUserDefaults] boolForKey:@"CleanExit"]) {

        [[LogManager sharedManager] logWithFormat:@"Installing SIGTERM handler"];

        InstallHandleSIGTERMFromRunLoop();

    } else {

        [[LogManager sharedManager] logWithFormat:@"Not installing SIGTERM handler"];

    }

    // Go go gadget Cocoa!

    [[LogManager sharedManager] logWithFormat:@"Starting Cocoa application"];

    retVal = NSApplicationMain(argc, (const char **) argv);

    [[LogManager sharedManager] logWithFormat:@"Cocoa application returned!?"];

    return retVal;

}