GameController.m

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/*
 
GameController.m
 
Oolite
Copyright (C) 2004-2013 Giles C Williams and contributors
 
This program 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.
 
This program 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., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
 
*/
 
#import "GameController.h"
#import "Universe.h"
#import "ResourceManager.h"
#import "MyOpenGLView.h"
#import "OOSound.h"
#import "OOOpenGL.h"
#import "PlayerEntityLoadSave.h"
#include <stdlib.h>
#import "OOCollectionExtractors.h"
#import "OOOXPVerifier.h"
#import "OOLoggingExtended.h"
#import "NSFileManagerOOExtensions.h"
#import "OOLogOutputHandler.h"
#import "OODebugFlags.h"
#import "OOJSFrameCallbacks.h"
#import "OOOpenGLExtensionManager.h"
#import "OOOpenALController.h"
#import "OODebugSupport.h"
#import "legacy_random.h"
#import "OOOXZManager.h"
#import "OOOpenGLMatrixManager.h"
 
#if OOLITE_MAC_OS_X
#import "JAPersistentFileReference.h"
#import <Sparkle/Sparkle.h>
#import "OoliteApp.h"
#import "OOMacJoystickManager.h"
 
static void SetUpSparkle(void);
#elif (OOLITE_GNUSTEP && !defined(NDEBUG))
#import "OODebugMonitor.h"
#endif
 
 
static GameController *sSharedController = nil;
 
 
@interface GameController (OOPrivate)
 
- (void)reportUnhandledStartupException:(NSException *)exception;
 
- (void)doPerformGameTick;
 
@end
 
 
@implementation GameController
 
+ (GameController *) sharedController
{
    if (sSharedController == nil)
    {
        sSharedController = [[self alloc] init];
    }
    return sSharedController;
}
 
 
- (id) init
{
    if (sSharedController != nil)
    {
        [self release];
        [NSException raise:NSInternalInconsistencyException format:@"%s: expected only one GameController to exist at a time.", __PRETTY_FUNCTION__];
    }
    
    if ((self = [super init]))
    {
        last_timeInterval = [NSDate timeIntervalSinceReferenceDate];
        delta_t = 0.01; // one hundredth of a second 
        _animationTimerInterval = [[NSUserDefaults standardUserDefaults] oo_doubleForKey:@"animation_timer_interval" defaultValue:MINIMUM_ANIMATION_TICK];
        
        // rather than seeding this with the date repeatedly, seed it
        // once here at startup
        ranrot_srand((uint32_t)[[NSDate date] timeIntervalSince1970]);   // reset randomiser with current time
        
        _splashStart = [[NSDate alloc] init];
    }
    
    return self;
}
 
 
- (void) dealloc
{
#if OOLITE_MAC_OS_X
    [[[NSWorkspace sharedWorkspace] notificationCenter] removeObserver:UNIVERSE];
#endif
    
    [timer release];
    [gameView release];
    [UNIVERSE release];
    
    [playerFileToLoad release];
    [playerFileDirectory release];
    [expansionPathsToInclude release];
    
    [super dealloc];
}
 
 
- (BOOL) isGamePaused
{
    return gameIsPaused;
}
 
 
- (void) setGamePaused:(BOOL)value
{
    if (value && !gameIsPaused)
    {
        _resumeMode = [self mouseInteractionMode];
        [self setMouseInteractionModeForUIWithMouseInteraction:NO];
        gameIsPaused = YES;
        [PLAYER doScriptEvent:OOJSID("gamePaused")];
    }
    else if (!value && gameIsPaused)
    {
        [self setMouseInteractionMode:_resumeMode];
        gameIsPaused = NO;
        [PLAYER doScriptEvent:OOJSID("gameResumed")];
    }
}
 
 
- (OOMouseInteractionMode) mouseInteractionMode
{
    return _mouseMode;
}
 
 
- (void) setMouseInteractionMode:(OOMouseInteractionMode)mode
{
    OOMouseInteractionMode oldMode = _mouseMode;
    if (mode == oldMode)  return;
    
    _mouseMode = mode;
    OOLog(@"input.mouseMode.changed", @"Mouse interaction mode changed from %@ to %@", OOStringFromMouseInteractionMode(oldMode), OOStringFromMouseInteractionMode(mode));
    
#if OO_USE_FULLSCREEN_CONTROLLER
    if ([self inFullScreenMode])
    {
        [_fullScreenController noteMouseInteractionModeChangedFrom:oldMode to:mode];
    }
    else
#endif
    {
        [[self gameView] noteMouseInteractionModeChangedFrom:oldMode to:mode];
    }
}
 
 
- (void) setMouseInteractionModeForFlight
{
    [self setMouseInteractionMode:[PLAYER isMouseControlOn] ? MOUSE_MODE_FLIGHT_WITH_MOUSE_CONTROL : MOUSE_MODE_FLIGHT_NO_MOUSE_CONTROL];
}
 
 
- (void) setMouseInteractionModeForUIWithMouseInteraction:(BOOL)interaction
{
    [self setMouseInteractionMode:interaction ? MOUSE_MODE_UI_SCREEN_WITH_INTERACTION : MOUSE_MODE_UI_SCREEN_NO_INTERACTION];
}
 
 
- (MyOpenGLView *) gameView
{
    return gameView;
}
 
 
- (void) setGameView:(MyOpenGLView *)view
{
    [gameView release];
    gameView = [view retain];
    [gameView setGameController:self];
    [UNIVERSE setGameView:gameView];
}
 
 
- (void) applicationDidFinishLaunching:(NSNotification *)notification
{
    NSAutoreleasePool   *pool = nil;
    unsigned            i;
    
    pool = [[NSAutoreleasePool alloc] init];
    
    @try
    {
        // if not verifying oxps, ensure that gameView is drawn to using beginSplashScreen
        // OpenGL is initialised and that allows textures to initialise too.
 
#if OO_OXP_VERIFIER_ENABLED
 
        if ([OOOXPVerifier runVerificationIfRequested])
        {
            [self exitAppWithContext:@"OXP verifier run"];
        }
        else 
        {
            [self beginSplashScreen];
        }
        
#else
        [self beginSplashScreen];
#endif
        
#if OOLITE_MAC_OS_X
        [OOJoystickManager setStickHandlerClass:[OOMacJoystickManager class]];
        SetUpSparkle();
#endif
        
        [self setUpDisplayModes];
        
        // moved to before the Universe is created
        if (expansionPathsToInclude)
        {
            for (i = 0; i < [expansionPathsToInclude count]; i++)
            {
                [ResourceManager addExternalPath: (NSString*)[expansionPathsToInclude objectAtIndex: i]];
            }
        }
        
        // initialise OXZ manager
        [OOOXZManager sharedManager];
 
        // moved here to try to avoid initialising this before having an Open GL context
        //[self logProgress:DESC(@"Initialising universe")]; // DESC expansions only possible after Universe init
        [[Universe alloc] initWithGameView:gameView];
        
        [self loadPlayerIfRequired];
        
        [self logProgress:@""];
        
        // get the run loop and add the call to performGameTick:
        [self startAnimationTimer];
        
        [self endSplashScreen];
    }
    @catch (NSException *exception)
    {
        [self reportUnhandledStartupException:exception];
        exit(EXIT_FAILURE);
    }
    
    OOLog(@"startup.complete", @"========== Loading complete in %.2f seconds. ==========", -[_splashStart timeIntervalSinceNow]);
    
#if OO_USE_FULLSCREEN_CONTROLLER
    [self setFullScreenMode:[[NSUserDefaults standardUserDefaults] boolForKey:@"fullscreen"]];
#endif
    
    // Release anything allocated above that is not required.
    [pool release];
    
#if !OOLITE_MAC_OS_X
    [[NSRunLoop currentRunLoop] run];
#endif
}
 
 
- (void) loadPlayerIfRequired
{
    if (playerFileToLoad != nil)
    {
        [self logProgress:DESC(@"loading-player")];
        // fix problem with non-shader lighting when starting skips
        // the splash screen
        [UNIVERSE useGUILightSource:YES];
        [UNIVERSE useGUILightSource:NO];
        [PLAYER loadPlayerFromFile:playerFileToLoad asNew:NO];
    }
}
 
 
- (void) beginSplashScreen
{
#if !OOLITE_MAC_OS_X
    if(!gameView)
    {
        gameView = [MyOpenGLView alloc];
        [gameView init];
        [gameView setGameController:self];
        [gameView initSplashScreen];
    }
#else
    [gameView updateScreen];
#endif
}
 
 
#if OOLITE_MAC_OS_X
 
- (void) performGameTick:(id)sender
{
    [gameView pollControls];
    [self doPerformGameTick];
}
 
#else
 
- (void) performGameTick:(id)sender
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    
    [gameView pollControls];
    [self doPerformGameTick];
    
    [pool release];
}
 
#endif
 
 
- (void) doPerformGameTick
{
    @try
    {
        if (gameIsPaused)
            delta_t = 0.0;  // no movement!
        else
        {
            delta_t = [NSDate timeIntervalSinceReferenceDate] - last_timeInterval;
            last_timeInterval += delta_t;
            if (delta_t > MINIMUM_GAME_TICK)
                delta_t = MINIMUM_GAME_TICK;        // peg the maximum pause (at 0.5->1.0 seconds) to protect against when the machine sleeps   
        }
        
        [UNIVERSE update:delta_t];
        if (EXPECT_NOT([PLAYER status] == STATUS_RESTART_GAME))
        {
            [UNIVERSE reinitAndShowDemo:YES];
        }
        [OOSound update];
        if (!gameIsPaused)
        {
            OOJSFrameCallbacksInvoke(delta_t);
        }
    }
    @catch (id exception) 
    {
        OOLog(@"exception.backtrace",@"%@",[exception callStackSymbols]);
    }
    
    @try
    {
        [gameView display];
    }
    @catch (id exception) {}
}
 
 
- (void) startAnimationTimer
{
    if (timer == nil)
    {   
        NSTimeInterval ti = _animationTimerInterval; // default one two-hundredth of a second (should be a fair bit faster than expected frame rate ~60Hz to avoid problems with phase differences)
        
        timer = [[NSTimer timerWithTimeInterval:ti target:self selector:@selector(performGameTick:) userInfo:nil repeats:YES] retain];
        
        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
#if OOLITE_MAC_OS_X
        [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSEventTrackingRunLoopMode];
#endif
 
    }
}
 
 
- (void) stopAnimationTimer
{
    if (timer != nil)
    {
        [timer invalidate];
        [timer release];
        timer = nil;
    }
}
 
 
#if OOLITE_MAC_OS_X
 
- (void) recenterVirtualJoystick
{
    // FIXME: does this really need to be spread across GameController and MyOpenGLView? -- Ahruman 2011-01-22
    my_mouse_x = my_mouse_y = 0;    // center mouse
    [gameView setVirtualJoystick:0.0 :0.0];
}
 
 
- (IBAction) showLogAction:sender
{
    [[NSWorkspace sharedWorkspace] openFile:[OOLogHandlerGetLogBasePath() stringByAppendingPathComponent:@"Previous.log"]];
}
 
 
- (IBAction) showLogFolderAction:sender
{
    [[NSWorkspace sharedWorkspace] openFile:OOLogHandlerGetLogBasePath()];
}
 
 
// Helpers to allow -snapshotsURLCreatingIfNeeded: code to be identical here and in dock tile plug-in.
static id GetPreference(NSString *key, Class expectedClass)
{
    id result = [[NSUserDefaults standardUserDefaults] objectForKey:key];
    if (expectedClass != Nil && ![result isKindOfClass:expectedClass])  result = nil;
    
    return result;
}
 
 
static void SetPreference(NSString *key, id value)
{
    [[NSUserDefaults standardUserDefaults] setObject:value forKey:key];
}
 
 
static void RemovePreference(NSString *key)
{
    [[NSUserDefaults standardUserDefaults] removeObjectForKey:key];
}
 
 
#define kSnapshotsDirRefKey     @"snapshots-directory-reference"
#define kSnapshotsDirNameKey    @"snapshots-directory-name"
 
- (NSURL *) snapshotsURLCreatingIfNeeded:(BOOL)create
{
    BOOL            stale = NO;
    NSDictionary    *snapshotDirDict = GetPreference(kSnapshotsDirRefKey, [NSDictionary class]);
    NSURL           *url = nil;
    NSString        *name = DESC(@"snapshots-directory-name-mac");
    
    if (snapshotDirDict != nil)
    {
        url = JAURLFromPersistentFileReference(snapshotDirDict, kJAPersistentFileReferenceWithoutUI | kJAPersistentFileReferenceWithoutMounting, &stale);
        if (url != nil)
        {
            NSString *existingName = [[url path] lastPathComponent];
            if ([existingName compare:name options:NSCaseInsensitiveSearch] != 0)
            {
                // Check name from previous access, because we might have changed localizations.
                NSString *originalOldName = GetPreference(kSnapshotsDirNameKey, [NSString class]);
                if (originalOldName == nil || [existingName compare:originalOldName options:NSCaseInsensitiveSearch] != 0)
                {
                    url = nil;
                }
            }
            
            // did we put the old directory in the trash?
            Boolean inTrash = false;
            const UInt8 *utfPath = (const UInt8 *)[[url path] UTF8String];
            
            OSStatus err = DetermineIfPathIsEnclosedByFolder(kOnAppropriateDisk, kTrashFolderType, utfPath, false, &inTrash);
            // if so, create a new directory.
            if (err == noErr && inTrash == true) url = nil;
        }
    }
    
    if (url == nil)
    {
        NSString *path = nil;
        NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDesktopDirectory, NSUserDomainMask, YES);
        if ([searchPaths count] > 0)
        {
            path = [[searchPaths objectAtIndex:0] stringByAppendingPathComponent:name];
        }
        url = [NSURL fileURLWithPath:path];
        
        if (url != nil)
        {
            stale = YES;
            if (create)
            {
                NSFileManager *fmgr = [NSFileManager defaultManager];
                if (![fmgr fileExistsAtPath:path])
                {
                    [fmgr oo_createDirectoryAtPath:path attributes:nil];
                }
            }
        }
    }
    
    if (stale)
    {
        snapshotDirDict = JAPersistentFileReferenceFromURL(url);
        if (snapshotDirDict != nil)
        {
            SetPreference(kSnapshotsDirRefKey, snapshotDirDict);
            SetPreference(kSnapshotsDirNameKey, [[url path] lastPathComponent]);
        }
        else
        {
            RemovePreference(kSnapshotsDirRefKey);
        }
    }
    
    return url;
}
 
 
- (IBAction) showSnapshotsAction:sender
{
    [[NSWorkspace sharedWorkspace] openURL:[self snapshotsURLCreatingIfNeeded:YES]];
}
 
 
- (IBAction) showAddOnsAction:sender
{
    NSArray *paths = ResourceManager.userRootPaths;
    
    // Look for an AddOns directory that actually contains some AddOns.
    for (NSString *path in paths) {
        if ([self addOnsExistAtPath:path]) {
            [self openPath:path];
            return;
        }
    }
    
    // If that failed, look for an AddOns directory that actually exists.
    for (NSString *path in paths) {
        if ([self isDirectoryAtPath:path]) {
            [self openPath:path];
            return;
        }
    }
    
    // None found, create the default path.
    [NSFileManager.defaultManager createDirectoryAtPath:[paths objectAtIndex:0]
                            withIntermediateDirectories:YES
                                             attributes:nil
                                                  error:NULL];
    [self openPath:[paths objectAtIndex:0]];
}
 
 
- (BOOL) isDirectoryAtPath:(NSString *)path
{
    BOOL isDirectory;
    return [NSFileManager.defaultManager fileExistsAtPath:path isDirectory:&isDirectory] && isDirectory;
}
 
 
- (BOOL) addOnsExistAtPath:(NSString *)path
{
    if (![self isDirectoryAtPath:path])  return NO;
    
    NSWorkspace *workspace = NSWorkspace.sharedWorkspace;
    for (NSString *subPath in [NSFileManager.defaultManager enumeratorAtPath:path]) {
        subPath = [path stringByAppendingPathComponent:subPath];
        NSString *type = [workspace typeOfFile:subPath error:NULL];
        if ([workspace type:type conformsToType:@"org.aegidian.oolite.expansion"])  return YES;
    }
    
    return NO;
}
 
 
- (void) openPath:(NSString *)path
{
    [NSWorkspace.sharedWorkspace openURL:[NSURL fileURLWithPath:path]];
}
 
 
- (BOOL) validateMenuItem:(NSMenuItem *)menuItem
{
    SEL action = menuItem.action;
    
    if (action == @selector(showLogAction:))
    {
        // the first path is always Resources
        return ([[NSFileManager defaultManager] fileExistsAtPath:[OOLogHandlerGetLogBasePath() stringByAppendingPathComponent:@"Previous.log"]]);
    }
    
    if (action == @selector(showAddOnsAction:))
    {
        // Always enabled in unrestricted mode, to allow users to add OXPs more easily.
        return [ResourceManager useAddOns] != nil;
    }
    
    if (action == @selector(showSnapshotsAction:))
    {
        BOOL    pathIsDirectory;
        if(![[NSFileManager defaultManager] fileExistsAtPath:[self snapshotsURLCreatingIfNeeded:NO].path isDirectory:&pathIsDirectory])
        {
            return NO;
        }
        return pathIsDirectory;
    }
    
    if (action == @selector(toggleFullScreenAction:))
    {
        if (_fullScreenController.fullScreenMode)
        {
            // NOTE: not DESC, because menu titles are not generally localizable.
            menuItem.title = NSLocalizedString(@"Exit Full Screen", NULL);
        }
        else
        {
            menuItem.title = NSLocalizedString(@"Enter Full Screen", NULL);
        }
    }
    
    // default
    return YES;
}
 
 
- (NSMenu *)applicationDockMenu:(NSApplication *)sender
{
    return dockMenu;
}
 
#elif OOLITE_SDL
 
- (NSURL *) snapshotsURLCreatingIfNeeded:(BOOL)create
{
    NSURL *url = [NSURL fileURLWithPath:[NSHomeDirectory() stringByAppendingPathComponent:DESC(@"snapshots-directory-name")]];
    
    if (create)
    {
        NSString *path = [url path];
        NSFileManager *fmgr = [NSFileManager defaultManager];
        if (![fmgr fileExistsAtPath:path])
        {
            [fmgr createDirectoryAtPath:path attributes:nil];
        }
    }
    return url;
}
 
#else
    #error Unknown environment!
#endif
 
- (void) logProgress:(NSString *)message
{
    if (![UNIVERSE doingStartUp])  return;
    
#if OOLITE_MAC_OS_X
    [splashProgressTextField setStringValue:message];
    [splashProgressTextField display];
#endif
    if([message length] > 0)
    {
        OOLog(@"startup.progress", @"===== [%.2f s] %@", -[_splashStart timeIntervalSinceNow], message);
    }
}
 
 
#if OO_DEBUG
#if OOLITE_MAC_OS_X
- (BOOL) debugMessageTrackingIsOn
{
    return splashProgressTextField != nil;
}
 
 
- (NSString *) debugMessageCurrentString
{
    return [splashProgressTextField stringValue];
}
#else
- (BOOL) debugMessageTrackingIsOn
{
    return OOLogWillDisplayMessagesInClass(@"startup.progress");
}
 
 
- (NSString *) debugMessageCurrentString
{
    return @"";
}
#endif
 
- (void) debugLogProgress:(NSString *)format, ...
{
    va_list args;
    va_start(args, format);
    [self debugLogProgress:format arguments:args];
    va_end(args);
}
 
 
- (void) debugLogProgress:(NSString *)format arguments:(va_list)arguments
{
    NSString *message = [[[NSString alloc] initWithFormat:format arguments:arguments] autorelease];
    [self logProgress:message];
}
 
 
static NSMutableArray *sMessageStack;
 
- (void) debugPushProgressMessage:(NSString *)format, ...
{
    if ([self debugMessageTrackingIsOn])
    {
        if (sMessageStack == nil)  sMessageStack = [[NSMutableArray alloc] init];
        [sMessageStack addObject:[self debugMessageCurrentString]];
        
        va_list args;
        va_start(args, format);
        [self debugLogProgress:format arguments:args];
        va_end(args);
    }
    
    OOLogIndentIf(@"startup.progress");
}
 
 
- (void) debugPopProgressMessage
{
    OOLogOutdentIf(@"startup.progress");
    
    if ([sMessageStack count] > 0)
    {
        NSString *message = [sMessageStack lastObject];
        if ([message length] > 0)  [self logProgress:message];
        [sMessageStack removeLastObject];
    }
}
 
#endif
 
 
- (void) endSplashScreen
{
    OOLogSetDisplayMessagesInClass(@"startup.progress", NO);
    
#if OOLITE_MAC_OS_X
    // These views will be released when we replace the content view.
    splashProgressTextField = nil;
    splashView = nil;
    
    [gameWindow setAcceptsMouseMovedEvents:YES];
    [gameWindow setContentView:gameView];
    [gameWindow makeFirstResponder:gameView];
#elif OOLITE_SDL
    [gameView endSplashScreen];
#endif
}
 
 
#if OOLITE_MAC_OS_X
 
// NIB methods
- (void)awakeFromNib
{
    NSString                *path = nil;
    
    // Set contents of Help window
    path = [[NSBundle mainBundle] pathForResource:@"OoliteReadMe" ofType:@"pdf"];
    if (path != nil)
    {
        PDFDocument *document = [[PDFDocument alloc] initWithURL:[NSURL fileURLWithPath:path]];
        [helpView setDocument:document];
        [document release];
    }
    [helpView setBackgroundColor:[NSColor whiteColor]];
}
 
 
// delegate methods
- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
{
    if ([[filename pathExtension] isEqual:@"oolite-save"])
    {
        [self setPlayerFileToLoad:filename];
        [self setPlayerFileDirectory:filename];
        return YES;
    }
    if ([[filename pathExtension] isEqualToString:@"oxp"])
    {
        BOOL dir_test;
        [[NSFileManager defaultManager] fileExistsAtPath:filename isDirectory:&dir_test];
        if (dir_test)
        {
            if (expansionPathsToInclude == nil)
            {
                expansionPathsToInclude = [[NSMutableArray alloc] init];
            }
            [expansionPathsToInclude addObject:filename];
            return YES;
        }
    }
    return NO;
}
 
 
- (void) exitAppWithContext:(NSString *)context
{
    [gameView.window orderOut:nil];
    [(OoliteApp *)NSApp setExitContext:context];
    [NSApp terminate:self];
}
 
 
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender
{
    [[OOCacheManager sharedCache] finishOngoingFlush];
    OOLoggingTerminate();
    return NSTerminateNow;
}
 
#elif OOLITE_SDL
 
- (void) exitAppWithContext:(NSString *)context
{
    OOLog(@"exit.context", @"Exiting: %@.", context);
#if (OOLITE_GNUSTEP && !defined(NDEBUG))
    [[OODebugMonitor sharedDebugMonitor] applicationWillTerminate];
#endif
#if OOLITE_WINDOWS
    // This should not be required normally but we have to ensure that
    // desktop resolution is restored also on some Intel cards on Win10
    if (![gameView atDesktopResolution])
    {
        OOLog(@"gameController.exitApp", @"%@", @"Restoring desktop resolution.");
        ChangeDisplaySettingsEx(NULL, NULL, NULL, 0, NULL);
    }
#endif
    [[NSUserDefaults standardUserDefaults] synchronize];
    OOLog(@"gameController.exitApp", @"%@", @".GNUstepDefaults synchronized.");
    OOLoggingTerminate();
    SDL_Quit();
    [[OOOpenALController sharedController] shutdown];
    exit(0);
}
 
#else
    #error Unknown environment!
#endif
 
 
- (void) exitAppCommandQ
{
    [self exitAppWithContext:@"Command-Q"];
}
 
 
- (void)windowDidResize:(NSNotification *)aNotification
{
    [gameView updateScreen];
}
 
 
- (NSString *) playerFileToLoad
{
    return playerFileToLoad;
}
 
 
- (void) setPlayerFileToLoad:(NSString *)filename
{
    if (playerFileToLoad)
        [playerFileToLoad autorelease];
    playerFileToLoad = nil;
    if ([[[filename pathExtension] lowercaseString] isEqual:@"oolite-save"])
        playerFileToLoad = [filename copy];
}
 
 
- (NSString *) playerFileDirectory
{
    if (playerFileDirectory == nil)
    {
        playerFileDirectory = [[NSUserDefaults standardUserDefaults] stringForKey:@"save-directory"];
        if (playerFileDirectory != nil && ![[NSFileManager defaultManager] fileExistsAtPath:playerFileDirectory])
        {
            playerFileDirectory = nil;
        }
        if (playerFileDirectory == nil)  playerFileDirectory = [[NSFileManager defaultManager] defaultCommanderPath];
        
        [playerFileDirectory retain];
    }
    
    return playerFileDirectory;
}
 
 
- (void) setPlayerFileDirectory:(NSString *)filename
{   
    if (playerFileDirectory != nil)
    {
        [playerFileDirectory autorelease];
        playerFileDirectory = nil;
    }
    
    if ([[[filename pathExtension] lowercaseString] isEqual:@"oolite-save"])
    {
        filename = [filename stringByDeletingLastPathComponent];
    }
    
    playerFileDirectory = [filename retain];
    [[NSUserDefaults standardUserDefaults] setObject:filename forKey:@"save-directory"];
}
 
 
- (void)reportUnhandledStartupException:(NSException *)exception
{
    OOLog(@"startup.exception", @"***** Unhandled exception during startup: %@ (%@).", [exception name], [exception reason]);
    
    #if OOLITE_MAC_OS_X
        // Display an error alert.
        // TODO: provide better information on reporting bugs in the manual, and refer to it here.
        NSRunCriticalAlertPanel(@"Oolite failed to start up, because an unhandled exception occurred.", @"An exception of type %@ occurred. If this problem persists, please file a bug report.", @"OK", NULL, NULL, [exception name]);
    #endif
}
 
 
- (void)setUpBasicOpenGLStateWithSize:(NSSize)viewSize
{
    OOOpenGLExtensionManager    *extMgr = [OOOpenGLExtensionManager sharedManager];
    
    float   ratio = 0.5;
    float   aspect = viewSize.height/viewSize.width;
    
    OOGL(glClearColor(0.0, 0.0, 0.0, 0.0));
    OOGL(glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT));
    
    OOGL(glClearDepth(1.0));
    OOGL(glViewport(0, 0, viewSize.width, viewSize.height));
    
    OOGLResetProjection(); // reset matrix
    OOGLFrustum(-ratio, ratio, -aspect*ratio, aspect*ratio, 1.0, MAX_CLEAR_DEPTH);  // set projection matrix
        
    OOGL(glDepthFunc(GL_LESS));         // depth buffer
    
    if (UNIVERSE)
    {
        [UNIVERSE setLighting];
    }
    else
    {
        GLfloat black[4] =  {0.0, 0.0, 0.0, 1.0};
        GLfloat white[] =   {1.0, 1.0, 1.0, 1.0};
        GLfloat stars_ambient[] =   {0.25, 0.2, 0.25, 1.0};
        
        OOGL(glLightfv(GL_LIGHT1, GL_AMBIENT, black));
        OOGL(glLightfv(GL_LIGHT1, GL_SPECULAR, white));
        OOGL(glLightfv(GL_LIGHT1, GL_DIFFUSE, white));
        OOGL(glLightfv(GL_LIGHT1, GL_POSITION, black));
        OOGL(glLightModelfv(GL_LIGHT_MODEL_AMBIENT, stars_ambient));
        
    }
    
    if ([extMgr usePointSmoothing])  OOGL(glEnable(GL_POINT_SMOOTH));
    if ([extMgr useLineSmoothing])  OOGL(glEnable(GL_LINE_SMOOTH));
    
    // world's simplest OpenGL optimisations...
#if GL_APPLE_transform_hint
    if ([extMgr haveExtension:@"GL_APPLE_transform_hint"])
    {
        OOGL(glHint(GL_TRANSFORM_HINT_APPLE, GL_FASTEST));
    }
#endif
    
    OOGL(glDisable(GL_NORMALIZE));
    OOGL(glDisable(GL_RESCALE_NORMAL));
    
#if GL_VERSION_1_2
    // For OpenGL 1.2 or later, we want GL_SEPARATE_SPECULAR_COLOR all the time.
    if ([extMgr versionIsAtLeastMajor:1 minor:2])
    {
        OOGL(glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR));
    }
#endif
}
 
 
#ifndef NDEBUG
/*  This method exists purely to suppress Clang static analyzer warnings that
    these ivars are unused (but may be used by categories, which they are).
*/
- (BOOL) suppressClangStuff
{
    return pauseSelector &&
    pauseTarget;
}
#endif
 
@end
 
 
#if OOLITE_MAC_OS_X
 
static void SetUpSparkle(void)
{
#define FEED_URL_BASE           "http://www.oolite.org/updates/"
#define TEST_RELEASE_FEED_NAME  "oolite-mac-test-release-appcast.xml"
#define DEPLOYMENT_FEED_NAME    "oolite-mac-appcast.xml"
 
#define TEST_RELEASE_FEED_URL   (@ FEED_URL_BASE TEST_RELEASE_FEED_NAME)
#define DEPLOYMENT_FEED_URL     (@ FEED_URL_BASE DEPLOYMENT_FEED_NAME)
 
// Default to test releases in test release or debug builds, and stable releases for deployment builds.
#ifdef NDEBUG
#define DEFAULT_TEST_RELEASE    0
#else
#define DEFAULT_TEST_RELEASE    1
#endif
    
    BOOL useTestReleases = [[NSUserDefaults standardUserDefaults] oo_boolForKey:@"use-test-release-updates"
                                                                   defaultValue:DEFAULT_TEST_RELEASE];
    
    SUUpdater *updater = [SUUpdater sharedUpdater];
    [updater setFeedURL:[NSURL URLWithString:useTestReleases ? TEST_RELEASE_FEED_URL : DEPLOYMENT_FEED_URL]];
}
 
#endif