/*   SDLMain.m - main entry point for our Cocoa-ized SDL app

       Initial Version: Darrell Walisser <dwaliss1@purdue.edu>

       Non-NIB-Code & other changes: Max Horn <max@quendi.de>

    Feel free to customize this file to suit your needs

*/

#import "SDL.h"

#import "SDLMain.h"

#import <sys/param.h> /* for MAXPATHLEN */

#import <unistd.h>

/* For some reaon, Apple removed setAppleMenu from the headers in 10.4,

 but the method still is there and works. To avoid warnings, we declare

 it ourselves here. */

@interface NSApplication(SDL_Missing_Methods)

- (void)setAppleMenu:(NSMenu *)menu;

@end

/* Use this flag to determine whether we use SDLMain.nib or not */

#define		SDL_USE_NIB_FILE	0

/* Use this flag to determine whether we use CPS (docking) or not */

#define		SDL_USE_CPS		1

#ifdef SDL_USE_CPS

/* Portions of CPS.h */

typedef struct CPSProcessSerNum

{

	UInt32		lo;

	UInt32		hi;

} CPSProcessSerNum;

extern OSErr	CPSGetCurrentProcess( CPSProcessSerNum *psn);

extern OSErr 	CPSEnableForegroundOperation( CPSProcessSerNum *psn, UInt32 _arg2, UInt32 _arg3, UInt32 _arg4, UInt32 _arg5);

extern OSErr	CPSSetFrontProcess( CPSProcessSerNum *psn);

#endif /* SDL_USE_CPS */

static int    gArgc;

static char  **gArgv;

static BOOL   gFinderLaunch;

static BOOL   gCalledAppMainline = FALSE;

static NSString *getApplicationName(void)

{

    NSDictionary *dict;

    NSString *appName = 0;

    /* Determine the application name */

    dict = (NSDictionary *)CFBundleGetInfoDictionary(CFBundleGetMainBundle());

    if (dict)

        appName = [dict objectForKey: @"CFBundleName"];

    if (![appName length])

        appName = [[NSProcessInfo processInfo] processName];

    return appName;

}

#if SDL_USE_NIB_FILE

/* A helper category for NSString */

@interface NSString (ReplaceSubString)

- (NSString *)stringByReplacingRange:(NSRange)aRange with:(NSString *)aString;

@end

#endif

@interface SDLApplication : NSApplication

@end

@implementation SDLApplication

/* Invoked from the Quit menu item */

- (void)terminate:(id)sender

{

    /* Post a SDL_QUIT event */

    SDL_Event event;

    event.type = SDL_QUIT;

    SDL_PushEvent(&event);

}

@end

/* The main class of the application, the application's delegate */

@implementation SDLMain

/* Set the working directory to the .app's parent directory */

- (void) setupWorkingDirectory:(BOOL)shouldChdir

{

    if (shouldChdir)

    {

        char parentdir[MAXPATHLEN];

		CFURLRef url = CFBundleCopyBundleURL(CFBundleGetMainBundle());

		CFURLRef url2 = CFURLCreateCopyDeletingLastPathComponent(0, url);

		if (CFURLGetFileSystemRepresentation(url2, true, (UInt8 *)parentdir, MAXPATHLEN)) {

	        assert ( chdir (parentdir) == 0 );   /* chdir to the binary app's parent */

		}

		CFRelease(url);

		CFRelease(url2);

	}

}

#if SDL_USE_NIB_FILE

/* Fix menu to contain the real app name instead of "SDL App" */

- (void)fixMenu:(NSMenu *)aMenu withAppName:(NSString *)appName

{

    NSRange aRange;

    NSEnumerator *enumerator;

    NSMenuItem *menuItem;

    aRange = [[aMenu title] rangeOfString:@"SDL App"];

    if (aRange.length != 0)

        [aMenu setTitle: [[aMenu title] stringByReplacingRange:aRange with:appName]];

    enumerator = [[aMenu itemArray] objectEnumerator];

    while ((menuItem = [enumerator nextObject]))

    {

        aRange = [[menuItem title] rangeOfString:@"SDL App"];

        if (aRange.length != 0)

            [menuItem setTitle: [[menuItem title] stringByReplacingRange:aRange with:appName]];

        if ([menuItem hasSubmenu])

            [self fixMenu:[menuItem submenu] withAppName:appName];

    }

    [ aMenu sizeToFit ];

}

#else

static void setApplicationMenu(void)

{

    /* warning: this code is very odd */

    NSMenu *appleMenu;

    NSMenuItem *menuItem;

    NSString *title;

    NSString *appName;

    appName = getApplicationName();

    appleMenu = [[NSMenu alloc] initWithTitle:@""];

    /* Add menu items */

    title = [@"About " stringByAppendingString:appName];

    [appleMenu addItemWithTitle:title action:@selector(orderFrontStandardAboutPanel:) keyEquivalent:@""];

    [appleMenu addItem:[NSMenuItem separatorItem]];

    title = [@"Hide " stringByAppendingString:appName];

    [appleMenu addItemWithTitle:title action:@selector(hide:) keyEquivalent:@"h"];

    menuItem = (NSMenuItem *)[appleMenu addItemWithTitle:@"Hide Others" action:@selector(hideOtherApplications:) keyEquivalent:@"h"];

    [menuItem setKeyEquivalentModifierMask:(NSAlternateKeyMask|NSCommandKeyMask)];

    [appleMenu addItemWithTitle:@"Show All" action:@selector(unhideAllApplications:) keyEquivalent:@""];

    [appleMenu addItem:[NSMenuItem separatorItem]];

    title = [@"Quit " stringByAppendingString:appName];

    [appleMenu addItemWithTitle:title action:@selector(terminate:) keyEquivalent:@"q"];

    /* Put menu into the menubar */

    menuItem = [[NSMenuItem alloc] initWithTitle:@"" action:nil keyEquivalent:@""];

    [menuItem setSubmenu:appleMenu];

    [[NSApp mainMenu] addItem:menuItem];

    /* Tell the application object that this is now the application menu */

    [NSApp setAppleMenu:appleMenu];

    /* Finally give up our references to the objects */

    [appleMenu release];

    [menuItem release];

}

/* Create a window menu */

static void setupWindowMenu(void)

{

    NSMenu      *windowMenu;

    NSMenuItem  *windowMenuItem;

    NSMenuItem  *menuItem;

    windowMenu = [[NSMenu alloc] initWithTitle:@"Window"];

    /* "Minimize" item */

    menuItem = [[NSMenuItem alloc] initWithTitle:@"Minimize" action:@selector(performMiniaturize:) keyEquivalent:@"m"];

    [windowMenu addItem:menuItem];

    [menuItem release];

    /* Put menu into the menubar */

    windowMenuItem = [[NSMenuItem alloc] initWithTitle:@"Window" action:nil keyEquivalent:@""];

    [windowMenuItem setSubmenu:windowMenu];

    [[NSApp mainMenu] addItem:windowMenuItem];

    /* Tell the application object that this is now the window menu */

    [NSApp setWindowsMenu:windowMenu];

    /* Finally give up our references to the objects */

    [windowMenu release];

    [windowMenuItem release];

}

/* Replacement for NSApplicationMain */

static void CustomApplicationMain (int argc, char **argv)

{

    NSAutoreleasePool	*pool = [[NSAutoreleasePool alloc] init];

    SDLMain				*sdlMain;

    /* Ensure the application object is initialised */

    [SDLApplication sharedApplication];

#ifdef SDL_USE_CPS

    {

        CPSProcessSerNum PSN;

        /* Tell the dock about us */

        if (!CPSGetCurrentProcess(&PSN))

            if (!CPSEnableForegroundOperation(&PSN,0x03,0x3C,0x2C,0x1103))

                if (!CPSSetFrontProcess(&PSN))

                    [SDLApplication sharedApplication];

    }

#endif /* SDL_USE_CPS */

    /* Set up the menubar */

    [NSApp setMainMenu:[[NSMenu alloc] init]];

    setApplicationMenu();

    setupWindowMenu();

    /* Create SDLMain and make it the app delegate */

    sdlMain = [[SDLMain alloc] init];

    [NSApp setDelegate:sdlMain];

    /* Start the main event loop */

    [NSApp run];

    [sdlMain release];

    [pool release];

}

#endif

/*

 * Catch document open requests...this lets us notice files when the app

 *  was launched by double-clicking a document, or when a document was

 *  dragged/dropped on the app's icon. You need to have a

 *  CFBundleDocumentsType section in your Info.plist to get this message,

 *  apparently.

 *

 * Files are added to gArgv, so to the app, they'll look like command line

 *  arguments. Previously, apps launched from the finder had nothing but

 *  an argv[0].

 *

 * This message may be received multiple times to open several docs on launch.

 *

 * This message is ignored once the app's mainline has been called.

 */

- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename

{

    const char *temparg;

    size_t arglen;

    char *arg;

    char **newargv;

    if (!gFinderLaunch)  /* MacOS is passing command line args. */

        return FALSE;

    if (gCalledAppMainline)  /* app has started, ignore this document. */

        return FALSE;

    temparg = [filename UTF8String];

    arglen = SDL_strlen(temparg) + 1;

    arg = (char *) SDL_malloc(arglen);

    if (arg == NULL)

        return FALSE;

    newargv = (char **) realloc(gArgv, sizeof (char *) * (gArgc + 2));

    if (newargv == NULL)

    {

        SDL_free(arg);

        return FALSE;

    }

    gArgv = newargv;

    SDL_strlcpy(arg, temparg, arglen);

    gArgv[gArgc++] = arg;

    gArgv[gArgc] = NULL;

    return TRUE;

}

/* Called when the internal event loop has just started running */

- (void) applicationDidFinishLaunching: (NSNotification *) note

{

    int status;

    /* Set the working directory to the .app's parent directory */

    [self setupWorkingDirectory:gFinderLaunch];

#if SDL_USE_NIB_FILE

    /* Set the main menu to contain the real app name instead of "SDL App" */

    [self fixMenu:[NSApp mainMenu] withAppName:getApplicationName()];

#endif

    /* Hand off to main application code */

    gCalledAppMainline = TRUE;

    status = SDL_main (gArgc, gArgv);

    /* We're done, thank you for playing */

    exit(status);

}

@end

@implementation NSString (ReplaceSubString)

- (NSString *)stringByReplacingRange:(NSRange)aRange with:(NSString *)aString

{

    unsigned int bufferSize;

    unsigned int selfLen = [self length];

    unsigned int aStringLen = [aString length];

    unichar *buffer;

    NSRange localRange;

    NSString *result;

    bufferSize = selfLen + aStringLen - aRange.length;

    buffer = NSAllocateMemoryPages(bufferSize*sizeof(unichar));

    /* Get first part into buffer */

    localRange.location = 0;

    localRange.length = aRange.location;

    [self getCharacters:buffer range:localRange];

    /* Get middle part into buffer */

    localRange.location = 0;

    localRange.length = aStringLen;

    [aString getCharacters:(buffer+aRange.location) range:localRange];

    /* Get last part into buffer */

    localRange.location = aRange.location + aRange.length;

    localRange.length = selfLen - localRange.location;

    [self getCharacters:(buffer+aRange.location+aStringLen) range:localRange];

    /* Build output string */

    result = [NSString stringWithCharacters:buffer length:bufferSize];

    NSDeallocateMemoryPages(buffer, bufferSize);

    return result;

}

@end

#ifdef main

#  undef main

#endif

/* Main entry point to executable - should *not* be SDL_main! */

int main (int argc, char **argv)

{

    /* Copy the arguments into a global variable */

    /* This is passed if we are launched by double-clicking */

    if ( argc >= 2 && strncmp (argv[1], "-psn", 4) == 0 ) {

        gArgv = (char **) SDL_malloc(sizeof (char *) * 2);

        gArgv[0] = argv[0];

        gArgv[1] = NULL;

        gArgc = 1;

        gFinderLaunch = YES;

    } else {

        int i;

        gArgc = argc;

        gArgv = (char **) SDL_malloc(sizeof (char *) * (argc+1));

        for (i = 0; i <= argc; i++)

            gArgv[i] = argv[i];

        gFinderLaunch = NO;

    }

#if SDL_USE_NIB_FILE

    [SDLApplication poseAsClass:[NSApplication class]];

    NSApplicationMain (argc, argv);

#else

    CustomApplicationMain (argc, argv);

#endif

    return 0;

}