src/main/macosx/SDLMain.m
author Ryan C. Gordon <icculus@icculus.org>
Sun, 01 Jan 2006 23:45:52 +0000
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To: sdl@libsdl.org From: Christian Walther <cwalther@gmx.ch> Date: Wed, 28 Dec 2005 12:13:20 +0100 Subject: [SDL] Fix for opening documents on Mac OS X < 10.4 The current code in SDLMain.m that transforms documents opened from the Finder into command-line arguments (introduced in revision 1.14, 2005-08-11) uses the methods -[NSString lengthOfBytesUsingEncoding:] and -[NSString getCString:maxLength:encoding:], which are only available in Mac OS X 10.4. Compiling this code on 10.3 produces warnings, and running it (i.e. starting an SDL application by opening a document) leads to weird behavior which I didn't investigate in detail ("*** -[NSCFString lengthOfBytesUsingEncoding:]: selector not recognized" is printed to the console log, and the SDL window never opens). The attached patch removes the offending calls and uses -[NSString UTF8String] instead, which is available everywhere. Tested on 10.3.9, and I see no reason why it shouldn't also work on 10.2 and 10.4. Two further comments: * The comment above the -[SDLMain application: openFile:] implementation says "You need to have a CFBundleDocumentsType section in your Info.plist to get this message, apparently." This is not the case in my experience - it worked just fine with a hand-built bare-bones application consisting only of Test.app/Contents/MacOS/test, without any Info.plist (although you have to press the option and command keys for such an application to accept a dragged file). * I took the liberty of cleaning up another area of SDLMain.m: I changed "CustomApplicationMain (argc, argv)" to "CustomApplicationMain (int argc, char **argv)". This avoids the "type of `argv' defaults to `int'" warnings, and I'm not sure if leaving out the types could cause problems on platforms where an int and a char** aren't of the same size. -Christian
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/*   SDLMain.m - main entry point for our Cocoa-ized SDL app
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       Initial Version: Darrell Walisser <dwaliss1@purdue.edu>
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       Non-NIB-Code & other changes: Max Horn <max@quendi.de>
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    Feel free to customize this file to suit your needs
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*/
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#import "SDL.h"
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#import "SDLMain.h"
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#import <sys/param.h> /* for MAXPATHLEN */
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#import <unistd.h>
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/* Use this flag to determine whether we use SDLMain.nib or not */
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#define		SDL_USE_NIB_FILE	0
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/* Use this flag to determine whether we use CPS (docking) or not */
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#define		SDL_USE_CPS		1
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#ifdef SDL_USE_CPS
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/* Portions of CPS.h */
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typedef struct CPSProcessSerNum
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{
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	UInt32		lo;
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	UInt32		hi;
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} CPSProcessSerNum;
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extern OSErr	CPSGetCurrentProcess( CPSProcessSerNum *psn);
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extern OSErr 	CPSEnableForegroundOperation( CPSProcessSerNum *psn, UInt32 _arg2, UInt32 _arg3, UInt32 _arg4, UInt32 _arg5);
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extern OSErr	CPSSetFrontProcess( CPSProcessSerNum *psn);
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#endif /* SDL_USE_CPS */
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static int    gArgc;
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static char  **gArgv;
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static BOOL   gFinderLaunch;
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static BOOL   gCalledAppMainline = FALSE;
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static NSString *getApplicationName(void)
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{
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    NSDictionary *dict;
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    NSString *appName = 0;
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    /* Determine the application name */
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    dict = (NSDictionary *)CFBundleGetInfoDictionary(CFBundleGetMainBundle());
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    if (dict)
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        appName = [dict objectForKey: @"CFBundleName"];
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    if (![appName length])
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        appName = [[NSProcessInfo processInfo] processName];
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    return appName;
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}
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#if SDL_USE_NIB_FILE
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/* A helper category for NSString */
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@interface NSString (ReplaceSubString)
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- (NSString *)stringByReplacingRange:(NSRange)aRange with:(NSString *)aString;
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@end
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#endif
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@interface SDLApplication : NSApplication
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@end
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@implementation SDLApplication
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/* Invoked from the Quit menu item */
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- (void)terminate:(id)sender
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{
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    /* Post a SDL_QUIT event */
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    SDL_Event event;
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    event.type = SDL_QUIT;
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    SDL_PushEvent(&event);
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}
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@end
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/* The main class of the application, the application's delegate */
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@implementation SDLMain
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/* Set the working directory to the .app's parent directory */
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- (void) setupWorkingDirectory:(BOOL)shouldChdir
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{
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    if (shouldChdir)
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    {
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        char parentdir[MAXPATHLEN];
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		CFURLRef url = CFBundleCopyBundleURL(CFBundleGetMainBundle());
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		CFURLRef url2 = CFURLCreateCopyDeletingLastPathComponent(0, url);
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		if (CFURLGetFileSystemRepresentation(url2, true, parentdir, MAXPATHLEN)) {
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	        assert ( chdir (parentdir) == 0 );   /* chdir to the binary app's parent */
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		}
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		CFRelease(url);
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		CFRelease(url2);
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	}
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}
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#if SDL_USE_NIB_FILE
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/* Fix menu to contain the real app name instead of "SDL App" */
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- (void)fixMenu:(NSMenu *)aMenu withAppName:(NSString *)appName
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{
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    NSRange aRange;
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    NSEnumerator *enumerator;
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    NSMenuItem *menuItem;
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    aRange = [[aMenu title] rangeOfString:@"SDL App"];
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    if (aRange.length != 0)
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        [aMenu setTitle: [[aMenu title] stringByReplacingRange:aRange with:appName]];
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    enumerator = [[aMenu itemArray] objectEnumerator];
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    while ((menuItem = [enumerator nextObject]))
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    {
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        aRange = [[menuItem title] rangeOfString:@"SDL App"];
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        if (aRange.length != 0)
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            [menuItem setTitle: [[menuItem title] stringByReplacingRange:aRange with:appName]];
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        if ([menuItem hasSubmenu])
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            [self fixMenu:[menuItem submenu] withAppName:appName];
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    }
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    [ aMenu sizeToFit ];
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}
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#else
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static void setApplicationMenu(void)
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{
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    /* warning: this code is very odd */
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    NSMenu *appleMenu;
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    NSMenuItem *menuItem;
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    NSString *title;
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    NSString *appName;
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    appName = getApplicationName();
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    appleMenu = [[NSMenu alloc] initWithTitle:@""];
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    /* Add menu items */
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    title = [@"About " stringByAppendingString:appName];
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    [appleMenu addItemWithTitle:title action:@selector(orderFrontStandardAboutPanel:) keyEquivalent:@""];
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    [appleMenu addItem:[NSMenuItem separatorItem]];
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    title = [@"Hide " stringByAppendingString:appName];
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    [appleMenu addItemWithTitle:title action:@selector(hide:) keyEquivalent:@"h"];
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    menuItem = (NSMenuItem *)[appleMenu addItemWithTitle:@"Hide Others" action:@selector(hideOtherApplications:) keyEquivalent:@"h"];
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    [menuItem setKeyEquivalentModifierMask:(NSAlternateKeyMask|NSCommandKeyMask)];
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    [appleMenu addItemWithTitle:@"Show All" action:@selector(unhideAllApplications:) keyEquivalent:@""];
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    [appleMenu addItem:[NSMenuItem separatorItem]];
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    title = [@"Quit " stringByAppendingString:appName];
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    [appleMenu addItemWithTitle:title action:@selector(terminate:) keyEquivalent:@"q"];
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    /* Put menu into the menubar */
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    menuItem = [[NSMenuItem alloc] initWithTitle:@"" action:nil keyEquivalent:@""];
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    [menuItem setSubmenu:appleMenu];
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    [[NSApp mainMenu] addItem:menuItem];
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    /* Tell the application object that this is now the application menu */
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    [NSApp setAppleMenu:appleMenu];
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    /* Finally give up our references to the objects */
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    [appleMenu release];
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    [menuItem release];
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}
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/* Create a window menu */
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static void setupWindowMenu(void)
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{
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    NSMenu      *windowMenu;
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    NSMenuItem  *windowMenuItem;
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    NSMenuItem  *menuItem;
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    windowMenu = [[NSMenu alloc] initWithTitle:@"Window"];
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    /* "Minimize" item */
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    menuItem = [[NSMenuItem alloc] initWithTitle:@"Minimize" action:@selector(performMiniaturize:) keyEquivalent:@"m"];
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    [windowMenu addItem:menuItem];
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    [menuItem release];
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    /* Put menu into the menubar */
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    windowMenuItem = [[NSMenuItem alloc] initWithTitle:@"Window" action:nil keyEquivalent:@""];
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    [windowMenuItem setSubmenu:windowMenu];
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    [[NSApp mainMenu] addItem:windowMenuItem];
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    /* Tell the application object that this is now the window menu */
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    [NSApp setWindowsMenu:windowMenu];
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    /* Finally give up our references to the objects */
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    [windowMenu release];
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    [windowMenuItem release];
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}
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/* Replacement for NSApplicationMain */
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static void CustomApplicationMain (int argc, char **argv)
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{
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    NSAutoreleasePool	*pool = [[NSAutoreleasePool alloc] init];
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    SDLMain				*sdlMain;
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    /* Ensure the application object is initialised */
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    [SDLApplication sharedApplication];
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#ifdef SDL_USE_CPS
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    {
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        CPSProcessSerNum PSN;
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        /* Tell the dock about us */
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        if (!CPSGetCurrentProcess(&PSN))
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            if (!CPSEnableForegroundOperation(&PSN,0x03,0x3C,0x2C,0x1103))
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                if (!CPSSetFrontProcess(&PSN))
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                    [SDLApplication sharedApplication];
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    }
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#endif /* SDL_USE_CPS */
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    /* Set up the menubar */
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    [NSApp setMainMenu:[[NSMenu alloc] init]];
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    setApplicationMenu();
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    setupWindowMenu();
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    /* Create SDLMain and make it the app delegate */
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    sdlMain = [[SDLMain alloc] init];
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    [NSApp setDelegate:sdlMain];
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    /* Start the main event loop */
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    [NSApp run];
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    [sdlMain release];
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    [pool release];
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}
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#endif
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/*
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 * Catch document open requests...this lets us notice files when the app
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 *  was launched by double-clicking a document, or when a document was
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 *  dragged/dropped on the app's icon. You need to have a
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 *  CFBundleDocumentsType section in your Info.plist to get this message,
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 *  apparently.
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 *
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 * Files are added to gArgv, so to the app, they'll look like command line
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 *  arguments. Previously, apps launched from the finder had nothing but
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 *  an argv[0].
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 *
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 * This message may be received multiple times to open several docs on launch.
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 *
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 * This message is ignored once the app's mainline has been called.
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 */
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- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
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{
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    if (!gFinderLaunch)  /* MacOS is passing command line args. */
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        return FALSE;
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    if (gCalledAppMainline)  /* app has started, ignore this document. */
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        return FALSE;
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    const char *temparg = [filename UTF8String];
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    char *arg = (char *) malloc(strlen(temparg) + 1);
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    if (arg == NULL)
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        return FALSE;
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    char **newargv = (char **) realloc(gArgv, sizeof (char *) * (gArgc + 2));
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    if (newargv == NULL)
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    {
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        free(arg);
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        return FALSE;
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    }
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    gArgv = newargv;
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1211
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    strcpy(arg, temparg);
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    gArgv[gArgc++] = arg;
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    gArgv[gArgc] = NULL;
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    return TRUE;
1113
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}
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194
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/* Called when the internal event loop has just started running */
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- (void) applicationDidFinishLaunching: (NSNotification *) note
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{
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    int status;
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    /* Set the working directory to the .app's parent directory */
221
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    [self setupWorkingDirectory:gFinderLaunch];
194
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221
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#if SDL_USE_NIB_FILE
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    /* Set the main menu to contain the real app name instead of "SDL App" */
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    [self fixMenu:[NSApp mainMenu] withAppName:getApplicationName()];
221
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#endif
194
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    /* Hand off to main application code */
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    gCalledAppMainline = TRUE;
194
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    status = SDL_main (gArgc, gArgv);
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   290
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    /* We're done, thank you for playing */
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    exit(status);
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}
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@end
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@implementation NSString (ReplaceSubString)
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   298
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- (NSString *)stringByReplacingRange:(NSRange)aRange with:(NSString *)aString
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{
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    unsigned int bufferSize;
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    unsigned int selfLen = [self length];
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    unsigned int aStringLen = [aString length];
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    unichar *buffer;
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    NSRange localRange;
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    NSString *result;
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    bufferSize = selfLen + aStringLen - aRange.length;
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    buffer = NSAllocateMemoryPages(bufferSize*sizeof(unichar));
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221
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    /* Get first part into buffer */
194
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    localRange.location = 0;
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    localRange.length = aRange.location;
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    [self getCharacters:buffer range:localRange];
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   315
    
221
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    /* Get middle part into buffer */
194
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    localRange.location = 0;
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    localRange.length = aStringLen;
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    [aString getCharacters:(buffer+aRange.location) range:localRange];
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   320
     
221
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   321
    /* Get last part into buffer */
194
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    localRange.location = aRange.location + aRange.length;
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    localRange.length = selfLen - localRange.location;
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    [self getCharacters:(buffer+aRange.location+aStringLen) range:localRange];
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   325
    
221
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   326
    /* Build output string */
194
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    result = [NSString stringWithCharacters:buffer length:bufferSize];
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   328
    
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    NSDeallocateMemoryPages(buffer, bufferSize);
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   330
    
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   331
    return result;
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   332
}
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   333
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   334
@end
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   335
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221
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   337
194
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   338
#ifdef main
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#  undef main
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#endif
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221
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   342
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   343
/* Main entry point to executable - should *not* be SDL_main! */
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   344
int main (int argc, char **argv)
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   345
{
194
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   346
    /* Copy the arguments into a global variable */
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   347
    /* This is passed if we are launched by double-clicking */
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   348
    if ( argc >= 2 && strncmp (argv[1], "-psn", 4) == 0 ) {
1113
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        gArgv = (char **) malloc(sizeof (char *) * 2);
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        gArgv[0] = argv[0];
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   351
        gArgv[1] = NULL;
194
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   352
        gArgc = 1;
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   353
        gFinderLaunch = YES;
194
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   354
    } else {
1113
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   355
        int i;
194
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   356
        gArgc = argc;
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        gArgv = (char **) malloc(sizeof (char *) * (argc+1));
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   358
        for (i = 0; i <= argc; i++)
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   359
            gArgv[i] = argv[i];
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217f119a19a0 Date: Thu, 2 Sep 2004 19:35:51 +0200
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   360
        gFinderLaunch = NO;
194
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diff changeset
   361
    }
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   362
221
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   363
#if SDL_USE_NIB_FILE
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diff changeset
   364
    [SDLApplication poseAsClass:[NSApplication class]];
194
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   365
    NSApplicationMain (argc, argv);
221
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diff changeset
   366
#else
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   367
    CustomApplicationMain (argc, argv);
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diff changeset
   368
#endif
194
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   369
    return 0;
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   370
}