/*
 * SDLMain.m
 * Copyright (C) 1998 Brainchild Design - http://brainchilddesign.com/
 * 
 * Copyright (C) 2001 Chuck Mason <cemason@users.sourceforge.net>
 *
 * Copyright (C) 2002 Florian Schulze <crow@icculus.org>
 *
 * Portions of this code are from the MPEG software simulation group
 * idct implementation. This code will be replaced with a new
 * implementation soon.
 *
 * This file is part of Jump'n'Bump.
 *
 * Jump'n'Bump is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Jump'n'Bump 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*   SDLMain.m - main entry point for our Cocoa-ized SDL app
		
	These files turn an SDL app into a double-clickable Cocoa app on mac os X.
	
    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"

/* SDLMain.h */
#import <Cocoa/Cocoa.h>

@interface SDLMain : NSObject
@end
/* SDLMain.h */

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


static int    gArgc;
static char  **gArgv;
static BOOL   gFinderLaunch;

/* A helper category for NSString */
@interface NSString (ReplaceSubString)
- (NSString *)stringByReplacingRange:(NSRange)aRange with:(NSString *)aString;
@end

@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
- (void)quit:(id)sender
{
	/* Post a SDL_QUIT event */
    SDL_Event event;
    event.type = SDL_QUIT;
    SDL_PushEvent(&event);

	//		uMenu::quickexit=true;
}
//this changes the current working directory to the resource folder of
//the .app bundle in Mac OS X
void MacOSX_SetCWD(char **argv) {
    char buffer[300];
    int count = 2, i;
    strcpy(buffer, argv[0]);

    if ( !strstr( buffer, ".app") ) {
        //it's not a .app bundle
        return;
    }

    for (i = strlen(buffer); i > 0 && count > 0; i--) {
        if (buffer[i] == '/')
            count--;
    }
    if (i == 0)
        return;
    i+=2;
    buffer[i] = 0;
    strcat( buffer, "Resources");
    printf(buffer);
    chdir( buffer );
}


/* 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 ];
}

/* Called when the internal event loop has just started running */
- (void) applicationDidFinishLaunching: (NSNotification *) note
{
    int status;

    /* Set the main menu to contain the real app name instead of "SDL App" */
    [self fixMenu:[NSApp mainMenu] withAppName:[[NSProcessInfo processInfo] processName]];

    /* Hand off to main application code */
    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 */
    int i;
    
    /* This is passed if we are launched by double-clicking */
    if ( argc >= 2 && strncmp (argv[1], "-psn", 4) == 0 ) {
        gArgc = 1;
	gFinderLaunch = YES;
    } else {
        gArgc = argc;
	gFinderLaunch = NO;
    }
    gArgv = (char**) malloc (sizeof(*gArgv) * (gArgc+1));
    assert (gArgv != NULL);
    for (i = 0; i < gArgc; i++)
        gArgv[i] = argv[i];
    gArgv[i] = NULL;

	MacOSX_SetCWD(gArgv);

    [SDLApplication poseAsClass:[NSApplication class]];
    NSApplicationMain (argc, argv);

    return 0;
}
