/* NSApplication.m The one and only application class Copyright (C) 1996 Free Software Foundation, Inc. Author: Scott Christley Date: 1996 Author: Felipe A. Rodriguez Date: August 1998 This file is part of the GNUstep GUI Library. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include #include #include #include #include #include #include #include #include #ifndef LIB_FOUNDATION_LIBRARY # include #endif #include #include #include #include #include #include #include #include #include #include #define CONVEY(a, b) [b retain]; \ [a release]; \ a = b; // // Class variables // static BOOL gnustep_gui_app_is_in_dealloc; static NSEvent *null_event; static id NSApp; @implementation NSApplication // // Class methods // + (void)initialize { if (self == [NSApplication class]) { NSDebugLog(@"Initialize NSApplication class\n"); // Initial version [self setVersion:1]; // So the application knows gnustep_gui_app_is_in_dealloc = NO; // its within dealloc and } // can prevent -release } // loops. + (NSApplication *)sharedApplication { // If the global application does if (!NSApp) // not exist yet then create it { NSApp = [self alloc]; // Don't combine the following two [NSApp init]; // statements into one to avoid } // problems with some classes' // initialization code that tries return NSApp; // to get the shared application. } // // Instance methods // // // Creating and initializing the NSApplication // - init { [super init]; NSDebugLog(@"Begin of NSApplication -init\n"); window_list = [NSMutableArray new]; // allocate window list window_count = 1; main_menu = nil; windows_need_update = YES; event_queue = [NSMutableArray new]; // allocate event queue current_event = [NSEvent new]; // no current event null_event = [NSEvent new]; // create dummy event [self setNextResponder:NULL]; // We are the end of // the responder chain // Set up the run loop // object for the // current thread [self setupRunLoopInputSourcesForMode:NSDefaultRunLoopMode]; [self setupRunLoopInputSourcesForMode:NSConnectionReplyMode]; [self setupRunLoopInputSourcesForMode:NSModalPanelRunLoopMode]; [self setupRunLoopInputSourcesForMode:NSEventTrackingRunLoopMode]; return self; } - (void)finishLaunching { NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; NSBundle* mainBundle = [NSBundle mainBundle]; NSString* resourcePath = [mainBundle resourcePath]; NSString* infoFilePath = [resourcePath stringByAppendingPathComponent:@"Info-gnustep.plist"]; NSDictionary* infoDict; NSString* mainModelFile; infoDict = [[NSString stringWithContentsOfFile:infoFilePath] propertyList]; mainModelFile = [infoDict objectForKey:@"NSMainNibFile"]; if (mainModelFile && ![mainModelFile isEqual:@""]) { if (![GMModel loadIMFile:mainModelFile owner:[NSApplication sharedApplication]]) NSLog (@"Cannot load the main model file '%@", mainModelFile); } // post notification that // launch will finish [nc postNotificationName: NSApplicationWillFinishLaunchingNotification object: self]; // finish the launching // post notification that // launching has finished [nc postNotificationName: NSApplicationDidFinishLaunchingNotification object: self]; } - (void)dealloc { NSDebugLog(@"Freeing NSApplication\n"); // Let ourselves know we gnustep_gui_app_is_in_dealloc = YES; // are within dealloc [window_list release]; [event_queue release]; [current_event release]; [super dealloc]; } // // Changing the active application // - (void)activateIgnoringOtherApps:(BOOL)flag { app_is_active = YES; } - (void)deactivate { app_is_active = NO; } - (BOOL)isActive { return app_is_active; } // // Running the event loop // - (void)abortModal { } - (NSModalSession)beginModalSessionForWindow:(NSWindow *)theWindow { return NULL; } - (void)endModalSession:(NSModalSession)theSession { } - (BOOL)isRunning { return app_is_running; } - (void)run { NSEvent *e; NSAutoreleasePool* pool; NSDebugLog(@"NSApplication -run\n"); [self finishLaunching]; app_should_quit = NO; app_is_running = YES; do { pool = [NSAutoreleasePool new]; e = [self nextEventMatchingMask:NSAnyEventMask untilDate:[NSDate distantFuture] inMode:NSDefaultRunLoopMode dequeue:YES]; if (e) [self sendEvent: e]; if(windows_need_update) // send an update message [self updateWindows]; // to all visible windows [pool release]; } while (!app_should_quit); NSDebugLog(@"NSApplication end of run loop\n"); } - (int)runModalForWindow:(NSWindow *)theWindow { [theWindow display]; [theWindow makeKeyAndOrderFront: self]; return 0; } - (int)runModalSession:(NSModalSession)theSession { return 0; } - (void)sendEvent:(NSEvent *)theEvent { if (theEvent == null_event) // Don't send null event { NSDebugLog(@"Not sending the Null Event\n"); return; } switch ([theEvent type]) // determine the event type { case NSPeriodic: // NSApplication traps the break; // periodic events case NSKeyDown: { NSDebugLog(@"send key down event\n"); [[theEvent window] sendEvent:theEvent]; break; } case NSKeyUp: { NSDebugLog(@"send key up event\n"); [[theEvent window] sendEvent:theEvent]; break; } case NSRightMouseDown: // Right mouse down if(main_menu) { static NSMenu *copyOfMainMenu = nil; NSWindow *copyMenuWindow; if(!copyOfMainMenu) // display the menu copyOfMainMenu = [main_menu copy]; // under the mouse copyMenuWindow = [copyOfMainMenu menuWindow]; [copyOfMainMenu _rightMouseDisplay]; [copyMenuWindow captureMouse:self]; [[copyOfMainMenu menuCells] mouseDown:theEvent]; [copyMenuWindow releaseMouse:self]; } break; default: // pass all other events to { // the event's window NSWindow* window = [theEvent window]; if (!theEvent) NSDebugLog(@"NSEvent is nil!\n"); NSDebugLog(@"NSEvent type: %d", [theEvent type]); NSDebugLog(@"send event to window"); NSDebugLog([window description]); if (!window) NSDebugLog(@"no window"); [window sendEvent:theEvent]; } } } - (void)stop:sender { app_is_running = NO; } - (void)stopModal { } - (void)stopModalWithCode:(int)returnCode { } // // Getting, removing, and posting events // - (NSEvent *)currentEvent; { return current_event; } - (void)discardEventsMatchingMask:(unsigned int)mask beforeEvent:(NSEvent *)lastEvent { int i = 0, count; NSEvent* event = nil; BOOL match = NO; count = [event_queue count]; event = [event_queue objectAtIndex:i]; while((event != lastEvent) && (i < count)) { if (mask == NSAnyEventMask) // any event is a match match = YES; else { if (event == null_event) match = YES; // dump all null events else { switch([event type]) { case NSLeftMouseDown: if (mask & NSLeftMouseDownMask) match = YES; break; case NSLeftMouseUp: if (mask & NSLeftMouseUpMask) match = YES; break; case NSRightMouseDown: if (mask & NSRightMouseDownMask) match = YES; break; case NSRightMouseUp: if (mask & NSRightMouseUpMask) match = YES; break; case NSMouseMoved: if (mask & NSMouseMovedMask) match = YES; break; case NSMouseEntered: if (mask & NSMouseEnteredMask) match = YES; break; case NSMouseExited: if (mask & NSMouseExitedMask) match = YES; break; case NSLeftMouseDragged: if (mask & NSLeftMouseDraggedMask) match = YES; break; case NSRightMouseDragged: if (mask & NSRightMouseDraggedMask) match = YES; break; case NSKeyDown: if (mask & NSKeyDownMask) match = YES; break; case NSKeyUp: if (mask & NSKeyUpMask) match = YES; break; case NSFlagsChanged: if (mask & NSFlagsChangedMask) match = YES; break; case NSPeriodic: if (mask & NSPeriodicMask) match = YES; break; case NSCursorUpdate: if (mask & NSCursorUpdateMask) match = YES; break; default: match = NO; break; } } } // remove event from // the queue if it if (match) // matched the mask [event_queue removeObjectAtIndex:i]; event = [event_queue objectAtIndex:++i]; // get the next event }; // in the queue } - (NSEvent*)_eventMatchingMask:(unsigned int)mask dequeue:(BOOL)flag { NSEvent* event; // return the next int i, count; // event in the queue BOOL match = NO; // which matches mask [self _nextEvent]; if ((count = [event_queue count])) // if queue contains { // events check them for (i = 0; i < count; i++) { // Get next event from event = [event_queue objectAtIndex:i]; // the events queue if (mask == NSAnyEventMask) // the any event mask match = YES; // matches all events else { if (event == null_event) // do not send the null { // event match = NO; if(flag) // dequeue null event { // if flag is set [event retain]; [event_queue removeObjectAtIndex:i]; } } else { switch([event type]) { case NSLeftMouseDown: if (mask & NSLeftMouseDownMask) match = YES; break; case NSLeftMouseUp: if (mask & NSLeftMouseUpMask) match = YES; break; case NSRightMouseDown: if (mask & NSRightMouseDownMask) match = YES; break; case NSRightMouseUp: if (mask & NSRightMouseUpMask) match = YES; break; case NSMouseMoved: if (mask & NSMouseMovedMask) match = YES; break; case NSMouseEntered: if (mask & NSMouseEnteredMask) match = YES; break; case NSMouseExited: if (mask & NSMouseExitedMask) match = YES; break; case NSLeftMouseDragged: if (mask & NSLeftMouseDraggedMask) match = YES; break; case NSRightMouseDragged: if (mask & NSRightMouseDraggedMask) match = YES; break; case NSKeyDown: if (mask & NSKeyDownMask) match = YES; break; case NSKeyUp: if (mask & NSKeyUpMask) match = YES; break; case NSFlagsChanged: if (mask & NSFlagsChangedMask) match = YES; break; case NSPeriodic: if (mask & NSPeriodicMask) match = YES; break; case NSCursorUpdate: if (mask & NSCursorUpdateMask) match = YES; break; default: match = NO; break; } } } if (match) { if(flag) // dequeue the event if { // flag is set [event retain]; [event_queue removeObjectAtIndex:i]; } CONVEY(current_event, event); return event; // return an event from } // the queue which } // matches the mask } // no event in the return nil; // queue matches mask } - (NSEvent *)nextEventMatchingMask:(unsigned int)mask untilDate:(NSDate *)expiration inMode:(NSString *)mode dequeue:(BOOL)flag { NSEvent *event; BOOL done = NO; if(mode == NSEventTrackingRunLoopMode) // temporary hack to inTrackingLoop = YES; // regulate translation else // of X motion events inTrackingLoop = NO; // while not in a // tracking loop if ((event = [self _eventMatchingMask:mask dequeue:flag])) done = YES; else if (!expiration) expiration = [NSDate distantFuture]; while (!done) // Not in queue so wait { // for next event NSDate *limitDate, *originalLimitDate; NSRunLoop* currentLoop = [NSRunLoop currentRunLoop]; // Retain the limitDate so that it doesn't get released // accidentally by runMode:beforeDate: if a timer which // has this date as fire date gets released. limitDate = [[currentLoop limitDateForMode:mode] retain]; originalLimitDate = limitDate; if ((event = [self _eventMatchingMask:mask dequeue:flag])) { [limitDate release]; break; } if (limitDate) limitDate = [expiration earlierDate:limitDate]; else limitDate = expiration; [currentLoop runMode:mode beforeDate:limitDate]; [originalLimitDate release]; if ((event = [self _eventMatchingMask:mask dequeue:flag])) break; } // no need to unhide cursor if (!inTrackingLoop) // while in a tracking loop { if ([NSCursor isHiddenUntilMouseMoves]) // do so only if we should { // unhide when mouse moves NSEventType type = [event type]; // and event is mouse event if ((type == NSLeftMouseDown) || (type == NSLeftMouseUp) || (type == NSRightMouseDown) || (type == NSRightMouseUp) || (type == NSMouseMoved)) { [NSCursor unhide]; } } } return event; } - (void)postEvent:(NSEvent *)event atStart:(BOOL)flag { if (!flag) [event_queue addObject: event]; else [event_queue insertObject: event atIndex: 0]; } // // Sending action messages // - (BOOL)sendAction:(SEL)aSelector to:aTarget from:sender { // If target responds if ([aTarget respondsToSelector:aSelector]) // to the selector then { // have it perform it [aTarget performSelector:aSelector withObject:sender]; return YES; } return NO; // Otherwise traverse } // the responder chain - targetForAction:(SEL)aSelector { return self; } - (BOOL)tryToPerform:(SEL)aSelector with:anObject { return NO; } - (void)setApplicationIconImage:(NSImage *)anImage { // Set the app's icon if (app_icon != nil) [app_icon release]; app_icon = [anImage retain]; } - (NSImage *)applicationIconImage { return app_icon; } // // Hiding all windows // - (void)hide:sender { int i, count; NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; // notify that we will hide [nc postNotificationName: NSApplicationWillHideNotification object: self]; // TODO: hide the menu // Tell the windows to hide for (i = 0, count = [window_list count]; i < count; i++) [[window_list objectAtIndex:i] performHide:sender]; app_is_hidden = YES; // notify that we did hide [nc postNotificationName: NSApplicationDidHideNotification object: self]; } - (BOOL)isHidden { return app_is_hidden; } - (void)unhide:sender { int i, count; // Tell windows to unhide for (i = 0, count = [window_list count]; i < count; i++) [[window_list objectAtIndex:i] performUnhide:sender]; // TODO: unhide the menu app_is_hidden = NO; // Bring the key window to [[self keyWindow] makeKeyAndOrderFront:self]; // the front } - (void)unhideWithoutActivation { NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; // notify we will unhide [nc postNotificationName: NSApplicationWillUnhideNotification object: self]; [self unhide: self]; // notify we did unhide [nc postNotificationName: NSApplicationDidUnhideNotification object: self]; } // // Managing windows // - (NSWindow *)keyWindow { int i, j; id w; j = [window_list count]; for (i = 0;i < j; ++i) { w = [window_list objectAtIndex:i]; if ([w isKeyWindow]) return w; } return nil; } - (NSWindow *)mainWindow { int i, j; id w; j = [window_list count]; for (i = 0;i < j; ++i) { w = [window_list objectAtIndex:i]; if ([w isMainWindow]) return w; } return nil; } - (NSWindow *)makeWindowsPerform:(SEL)aSelector inOrder:(BOOL)flag { return nil; } - (void)miniaturizeAll:sender { int i, count; for (i = 0, count = [window_list count]; i < count; i++) [[window_list objectAtIndex:i] miniaturize:sender]; } - (void)preventWindowOrdering { } - (void)setWindowsNeedUpdate:(BOOL)flag { windows_need_update = flag; } - (void)updateWindows // send an update message { // to all visible windows int i, count; NSNotificationCenter *nc = [NSNotificationCenter defaultCenter]; // notify that an update is // imminent [nc postNotificationName:NSApplicationWillUpdateNotification object:self]; for (i = 0, count = [window_list count]; i < count; i++) { NSWindow *win = [window_list objectAtIndex:i]; if([win isVisible]) // send update only if the [win update]; // window is visible } // notify update did occur [nc postNotificationName:NSApplicationDidUpdateNotification object:self]; } - (NSArray *)windows { return window_list; } - (NSWindow *)windowWithWindowNumber:(int)windowNum { int i, j; NSWindow *w; j = [window_list count]; for (i = 0;i < j; ++i) { w = [window_list objectAtIndex:i]; if ([w windowNumber] == windowNum) return w; } return nil; } // // Showing Standard Panels // - (void)orderFrontColorPanel:sender { } - (void)orderFrontDataLinkPanel:sender { } - (void)orderFrontHelpPanel:sender { } - (void)runPageLayout:sender { } // // Getting the main menu // - (NSMenu *)mainMenu { return main_menu; } - (void)setMainMenu:(NSMenu *)aMenu { int i, j; NSMenuItem *mc; NSArray *mi; [aMenu retain]; // Release old menu and if(main_menu) // retain new [main_menu release]; main_menu = aMenu; mi = [main_menu itemArray]; // find a menucell with j = [mi count]; // the title Windows windows_menu = nil; // this is the default for (i = 0;i < j; ++i) // windows menu { mc = [mi objectAtIndex:i]; if ([[mc stringValue] compare:@"Windows"] == NSOrderedSame) { windows_menu = mc; // Found it! break; } } } // // Managing the Windows menu // - (void)addWindowsItem:aWindow title:(NSString *)aString filename:(BOOL)isFilename { int i; if (![aWindow isKindOfClass:[NSWindow class]]) // proceed only if subclass return; // of window i = [window_list count]; // Add to our window list, [window_list addObject:aWindow]; // the array retains it [aWindow setWindowNumber:window_count]; // set its window number ++window_count; if (i == 0) // If this was the first { // window then make it the [aWindow becomeMainWindow]; // main and key window [aWindow becomeKeyWindow]; } } - (void)arrangeInFront:sender { } - (void)changeWindowsItem:aWindow title:(NSString *)aString filename:(BOOL)isFilename { } - (void)removeWindowsItem:aWindow { if (aWindow == key_window) // This should be different key_window = nil; if (aWindow == main_window) main_window = nil; // If we are within our dealloc then don't remove the window // Most likely dealloc is removing windows from our window list // and subsequently NSWindow is caling us to remove itself. if (gnustep_gui_app_is_in_dealloc) return; // Remove window from the [window_list removeObject: aWindow]; // window list return; } - (void)setWindowsMenu:aMenu { if (windows_menu) [windows_menu setSubmenu:aMenu]; } - (void)updateWindowsItem:aWindow { } - (NSMenu *)windowsMenu { if(windows_menu) return [windows_menu submenu]; else return nil; } // // Managing the Service menu // - (void)registerServicesMenuSendTypes:(NSArray *)sendTypes returnTypes:(NSArray *)returnTypes { } - (NSMenu *)servicesMenu { return nil; } - (void)setServicesMenu:(NSMenu *)aMenu { } - validRequestorForSendType:(NSString *)sendType returnType:(NSString *)returnType { return nil; } - (GPSDrawContext *)context // return the DPS context { return [GPSDrawContext currentContext]; } // Reporting an exception - (void)reportException:(NSException *)anException { } // // Terminating the application // - (void)terminate:sender { if ([self applicationShouldTerminate:self]) { // app should end run loop app_should_quit = YES; [event_queue addObject: null_event]; // add dummy event to queue } // to assure loop cycles } // at least one more time - delegate // Assigning a delegate { return delegate; } - (void)setDelegate:anObject { NSNotificationCenter* nc = [NSNotificationCenter defaultCenter]; delegate = anObject; #define SET_DELEGATE_NOTIFICATION(notif_name) \ if ([delegate respondsToSelector:@selector(application##notif_name:)]) \ [nc addObserver:delegate \ selector:@selector(application##notif_name:) \ name:NSApplication##notif_name##Notification object:self] SET_DELEGATE_NOTIFICATION(DidBecomeActive); SET_DELEGATE_NOTIFICATION(DidFinishLaunching); SET_DELEGATE_NOTIFICATION(DidHide); SET_DELEGATE_NOTIFICATION(DidResignActive); SET_DELEGATE_NOTIFICATION(DidUnhide); SET_DELEGATE_NOTIFICATION(DidUpdate); SET_DELEGATE_NOTIFICATION(WillBecomeActive); SET_DELEGATE_NOTIFICATION(WillFinishLaunching); SET_DELEGATE_NOTIFICATION(WillHide); SET_DELEGATE_NOTIFICATION(WillResignActive); SET_DELEGATE_NOTIFICATION(WillUnhide); SET_DELEGATE_NOTIFICATION(WillUpdate); } // // Implemented by the delegate // - (BOOL)application:sender openFileWithoutUI:(NSString *)filename { BOOL result = NO; if ([delegate respondsToSelector:@selector(application:openFileWithoutUI:)]) result = [delegate application:sender openFileWithoutUI:filename]; return result; } - (BOOL)application:(NSApplication *)app openFile:(NSString *)filename { BOOL result = NO; if ([delegate respondsToSelector:@selector(application:openFile:)]) result = [delegate application:app openFile:filename]; return result; } - (BOOL)application:(NSApplication *)app openTempFile:(NSString *)filename { BOOL result = NO; if ([delegate respondsToSelector:@selector(application:openTempFile:)]) result = [delegate application:app openTempFile:filename]; return result; } - (void)applicationDidBecomeActive:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidBecomeActive:)]) [delegate applicationDidBecomeActive:aNotification]; } - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidFinishLaunching:)]) [delegate applicationDidFinishLaunching:aNotification]; } - (void)applicationDidHide:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidHide:)]) [delegate applicationDidHide:aNotification]; } - (void)applicationDidResignActive:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidResignActive:)]) [delegate applicationDidResignActive:aNotification]; } - (void)applicationDidUnhide:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidUnhide:)]) [delegate applicationDidUnhide:aNotification]; } - (void)applicationDidUpdate:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationDidUpdate:)]) [delegate applicationDidUpdate:aNotification]; } - (BOOL)applicationOpenUntitledFile:(NSApplication *)app { BOOL result = NO; if ([delegate respondsToSelector:@selector(applicationOpenUntitledFile:)]) result = [delegate applicationOpenUntitledFile:app]; return result; } - (BOOL)applicationShouldTerminate:sender { BOOL result = YES; if ([delegate respondsToSelector:@selector(applicationShouldTerminate:)]) result = [delegate applicationShouldTerminate:sender]; return result; } - (void)applicationWillBecomeActive:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillBecomeActive:)]) [delegate applicationWillBecomeActive:aNotification]; } - (void)applicationWillFinishLaunching:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillFinishLaunching:)]) [delegate applicationWillFinishLaunching:aNotification]; } - (void)applicationWillHide:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillHide:)]) [delegate applicationWillHide:aNotification]; } - (void)applicationWillResignActive:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillResignActive:)]) [delegate applicationWillResignActive:aNotification]; } - (void)applicationWillUnhide:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillUnhide:)]) [delegate applicationWillUnhide:aNotification]; } - (void)applicationWillUpdate:(NSNotification *)aNotification { if ([delegate respondsToSelector:@selector(applicationWillUpdate:)]) [delegate applicationWillUpdate:aNotification]; } // // NSCoding protocol // - (void)encodeWithCoder:aCoder { [super encodeWithCoder:aCoder]; [aCoder encodeObject: window_list]; [aCoder encodeConditionalObject:key_window]; [aCoder encodeConditionalObject:main_window]; [aCoder encodeConditionalObject:delegate]; [aCoder encodeObject:main_menu]; [aCoder encodeConditionalObject:windows_menu]; } - initWithCoder:aDecoder { [super initWithCoder:aDecoder]; window_list = [aDecoder decodeObject]; key_window = [aDecoder decodeObject]; main_window = [aDecoder decodeObject]; delegate = [aDecoder decodeObject]; main_menu = [aDecoder decodeObject]; windows_menu = [aDecoder decodeObject]; return self; } + (void)setNullEvent:(NSEvent *)e { CONVEY(null_event, e); } + (NSEvent *)getNullEvent; { // return the class return null_event; // dummy event } - (void)_nextEvent // get next event { // implemented in } // backend - (void)setupRunLoopInputSourcesForMode:(NSString*)mode { // implemented in } // backend @end /* Some utilities */ NSString *NSOpenStepRootDirectory(void) { NSString* root = [[[NSProcessInfo processInfo] environment] objectForKey:@"GNUSTEP_SYSTEM_ROOT"]; if (!root) root = @"/"; return root; }