src/video/cocoa/SDL_cocoawindow.m

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2011 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 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
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

#include "SDL_syswm.h"
#include "SDL_timer.h"  /* For SDL_GetTicks() */
#include "../SDL_sysvideo.h"
#include "../../events/SDL_keyboard_c.h"
#include "../../events/SDL_mouse_c.h"
#include "../../events/SDL_touch_c.h"
#include "../../events/SDL_windowevents_c.h"
#include "SDL_cocoavideo.h"
#include "SDL_cocoashape.h"
#include "SDL_cocoamouse.h"


static Uint32 s_moveHack;

static __inline__ void ConvertNSRect(NSRect *r)
{
    r->origin.y = CGDisplayPixelsHigh(kCGDirectMainDisplay) - r->origin.y - r->size.height;
}

@implementation Cocoa_WindowListener

- (void)listen:(SDL_WindowData *)data
{
    NSNotificationCenter *center;
    NSWindow *window = data->nswindow;
    NSView *view = [window contentView];

    _data = data;

    center = [NSNotificationCenter defaultCenter];

    if ([window delegate] != nil) {
        [center addObserver:self selector:@selector(windowDidExpose:) name:NSWindowDidExposeNotification object:window];
        [center addObserver:self selector:@selector(windowDidMove:) name:NSWindowDidMoveNotification object:window];
        [center addObserver:self selector:@selector(windowDidResize:) name:NSWindowDidResizeNotification object:window];
        [center addObserver:self selector:@selector(windowDidMiniaturize:) name:NSWindowDidMiniaturizeNotification object:window];
        [center addObserver:self selector:@selector(windowDidDeminiaturize:) name:NSWindowDidDeminiaturizeNotification object:window];
        [center addObserver:self selector:@selector(windowDidBecomeKey:) name:NSWindowDidBecomeKeyNotification object:window];
        [center addObserver:self selector:@selector(windowDidResignKey:) name:NSWindowDidResignKeyNotification object:window];
    } else {
        [window setDelegate:self];
    }

    [window setNextResponder:self];
    [window setAcceptsMouseMovedEvents:YES];

    [view setNextResponder:self];
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
    [view setAcceptsTouchEvents:YES];
#endif
}

- (void)close
{
    NSNotificationCenter *center;
    NSWindow *window = _data->nswindow;
    NSView *view = [window contentView];

    center = [NSNotificationCenter defaultCenter];

    if ([window delegate] != self) {
        [center removeObserver:self name:NSWindowDidExposeNotification object:window];
        [center removeObserver:self name:NSWindowDidMoveNotification object:window];
        [center removeObserver:self name:NSWindowDidResizeNotification object:window];
        [center removeObserver:self name:NSWindowDidMiniaturizeNotification object:window];
        [center removeObserver:self name:NSWindowDidDeminiaturizeNotification object:window];
        [center removeObserver:self name:NSWindowDidBecomeKeyNotification object:window];
        [center removeObserver:self name:NSWindowDidResignKeyNotification object:window];
    } else {
        [window setDelegate:nil];
    }

    if ([window nextResponder] == self) {
        [window setNextResponder:nil];
    }
    if ([view nextResponder] == self) {
        [view setNextResponder:nil];
    }
}

- (BOOL)windowShouldClose:(id)sender
{
    SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
    return NO;
}

- (void)windowDidExpose:(NSNotification *)aNotification
{
    SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_EXPOSED, 0, 0);
}

- (void)windowDidMove:(NSNotification *)aNotification
{
    int x, y;
    SDL_Window *window = _data->window;
    NSWindow *nswindow = _data->nswindow;
    NSRect rect = [nswindow contentRectForFrameRect:[nswindow frame]];
    ConvertNSRect(&rect);

    if (s_moveHack) {
        SDL_bool blockMove = ((SDL_GetTicks() - s_moveHack) < 500);

        s_moveHack = 0;

        if (blockMove) {
            /* Cocoa is adjusting the window in response to a mode change */
            rect.origin.x = window->x;
            rect.origin.y = window->y;
            ConvertNSRect(&rect);
            [nswindow setFrameOrigin:rect.origin];
            return;
        }
    }

    x = (int)rect.origin.x;
    y = (int)rect.origin.y;
    SDL_SendWindowEvent(window, SDL_WINDOWEVENT_MOVED, x, y);
}

- (void)windowDidResize:(NSNotification *)aNotification
{
    int w, h;
    NSRect rect = [_data->nswindow contentRectForFrameRect:[_data->nswindow frame]];
    w = (int)rect.size.width;
    h = (int)rect.size.height;
    if (SDL_IsShapedWindow(_data->window))
        Cocoa_ResizeWindowShape(_data->window);
    SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_RESIZED, w, h);
}

- (void)windowDidMiniaturize:(NSNotification *)aNotification
{
    SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
}

- (void)windowDidDeminiaturize:(NSNotification *)aNotification
{
    SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_RESTORED, 0, 0);
}

- (void)windowDidBecomeKey:(NSNotification *)aNotification
{
    SDL_Window *window = _data->window;

    /* We're going to get keyboard events, since we're key. */
    SDL_SetKeyboardFocus(window);

    /* If we just gained focus we need the updated mouse position */
    {
        NSPoint point;
        int x, y;

        point = [_data->nswindow mouseLocationOutsideOfEventStream];
        x = (int)point.x;
        y = (int)(window->h - point.y);

        if (x >= 0 && x < window->w && y >= 0 && y < window->h) {
            if (SDL_GetMouseFocus() != window) {
                [self mouseEntered:nil];
            }
            SDL_SendMouseMotion(window, 0, x, y);
        }
    }

    /* Check to see if someone updated the clipboard */
    Cocoa_CheckClipboardUpdate(_data->videodata);
}

- (void)windowDidResignKey:(NSNotification *)aNotification
{
    /* Some other window will get mouse events, since we're not key. */
    if (SDL_GetMouseFocus() == _data->window) {
        SDL_SetMouseFocus(NULL);
    }

    /* Some other window will get keyboard events, since we're not key. */
    if (SDL_GetKeyboardFocus() == _data->window) {
        SDL_SetKeyboardFocus(NULL);
    }
}

- (void)mouseDown:(NSEvent *)theEvent
{
    int button;

    switch ([theEvent buttonNumber]) {
    case 0:
        button = SDL_BUTTON_LEFT;
        break;
    case 1:
        button = SDL_BUTTON_RIGHT;
        break;
    case 2:
        button = SDL_BUTTON_MIDDLE;
        break;
    default:
        button = [theEvent buttonNumber] + 1;
        break;
    }
    SDL_SendMouseButton(_data->window, SDL_PRESSED, button);
}

- (void)rightMouseDown:(NSEvent *)theEvent
{
    [self mouseDown:theEvent];
}

- (void)otherMouseDown:(NSEvent *)theEvent
{
    [self mouseDown:theEvent];
}

- (void)mouseUp:(NSEvent *)theEvent
{
    int button;

    switch ([theEvent buttonNumber]) {
    case 0:
        button = SDL_BUTTON_LEFT;
        break;
    case 1:
        button = SDL_BUTTON_RIGHT;
        break;
    case 2:
        button = SDL_BUTTON_MIDDLE;
        break;
    default:
        button = [theEvent buttonNumber] + 1;
        break;
    }
    SDL_SendMouseButton(_data->window, SDL_RELEASED, button);
}

- (void)rightMouseUp:(NSEvent *)theEvent
{
    [self mouseUp:theEvent];
}

- (void)otherMouseUp:(NSEvent *)theEvent
{
    [self mouseUp:theEvent];
}

- (void)mouseEntered:(NSEvent *)theEvent
{
    SDL_Mouse *mouse = SDL_GetMouse();

    SDL_SetMouseFocus(_data->window);

    SDL_SetCursor(NULL);
}

- (void)mouseExited:(NSEvent *)theEvent
{
    SDL_Window *window = _data->window;

    if (SDL_GetMouseFocus() == window) {
        if (window->flags & SDL_WINDOW_INPUT_GRABBED) {
            int x, y;
            NSPoint point;
            CGPoint cgpoint;

            point = [theEvent locationInWindow];
            point.y = window->h - point.y;

            SDL_SendMouseMotion(window, 0, (int)point.x, (int)point.y);
            SDL_GetMouseState(&x, &y);
            cgpoint.x = window->x + x;
            cgpoint.y = window->y + y;
            CGDisplayMoveCursorToPoint(kCGDirectMainDisplay, cgpoint);
        } else {
            SDL_SetMouseFocus(NULL);

            [[NSCursor arrowCursor] set];
            [NSCursor unhide];
        }
    }
}

- (void)mouseMoved:(NSEvent *)theEvent
{
    SDL_Mouse *mouse = SDL_GetMouse();
    SDL_Window *window = _data->window;
    NSPoint point;
    int x, y;

    if (mouse->relative_mode) {
        return;
    }

    point = [theEvent locationInWindow];
    x = (int)point.x;
    y = (int)(window->h - point.y);

    if (x < 0 || x >= window->w || y < 0 || y >= window->h) {
        if (SDL_GetMouseFocus() == window) {
            [self mouseExited:theEvent];
        }
    } else {
        if (SDL_GetMouseFocus() != window) {
            [self mouseEntered:theEvent];
        }
        SDL_SendMouseMotion(window, 0, x, y);
    }
}

- (void)mouseDragged:(NSEvent *)theEvent
{
    [self mouseMoved:theEvent];
}

- (void)rightMouseDragged:(NSEvent *)theEvent
{
    [self mouseMoved:theEvent];
}

- (void)otherMouseDragged:(NSEvent *)theEvent
{
    [self mouseMoved:theEvent];
}

- (void)scrollWheel:(NSEvent *)theEvent
{
    Cocoa_HandleMouseWheel(_data->window, theEvent);
}

- (void)touchesBeganWithEvent:(NSEvent *) theEvent
{
    [self handleTouches:COCOA_TOUCH_DOWN withEvent:theEvent];
}

- (void)touchesMovedWithEvent:(NSEvent *) theEvent
{
    [self handleTouches:COCOA_TOUCH_MOVE withEvent:theEvent];
}

- (void)touchesEndedWithEvent:(NSEvent *) theEvent
{
    [self handleTouches:COCOA_TOUCH_UP withEvent:theEvent];
}

- (void)touchesCancelledWithEvent:(NSEvent *) theEvent
{
    [self handleTouches:COCOA_TOUCH_CANCELLED withEvent:theEvent];
}

- (void)handleTouches:(cocoaTouchType)type withEvent:(NSEvent *)event
{
#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
    NSSet *touches = 0;
    NSEnumerator *enumerator;
    NSTouch *touch;

    switch (type) {
        case COCOA_TOUCH_DOWN:
            touches = [event touchesMatchingPhase:NSTouchPhaseBegan inView:nil];
            break;
        case COCOA_TOUCH_UP:
        case COCOA_TOUCH_CANCELLED:
            touches = [event touchesMatchingPhase:NSTouchPhaseEnded inView:nil];
            break;
        case COCOA_TOUCH_MOVE:
            touches = [event touchesMatchingPhase:NSTouchPhaseMoved inView:nil];
            break;
    }

    enumerator = [touches objectEnumerator];
    touch = (NSTouch*)[enumerator nextObject];
    while (touch) {
        SDL_TouchID touchId = (SDL_TouchID)[touch device];
        if (!SDL_GetTouch(touchId)) {
            SDL_Touch touch;

            touch.id = touchId;
            touch.x_min = 0;
            touch.x_max = 1;
            touch.native_xres = touch.x_max - touch.x_min;
            touch.y_min = 0;
            touch.y_max = 1;
            touch.native_yres = touch.y_max - touch.y_min;
            touch.pressure_min = 0;
            touch.pressure_max = 1;
            touch.native_pressureres = touch.pressure_max - touch.pressure_min;
            
            if (SDL_AddTouch(&touch, "") < 0) {
                return;
            }
        } 

        SDL_FingerID fingerId = (SDL_FingerID)[touch identity];
        float x = [touch normalizedPosition].x;
        float y = [touch normalizedPosition].y;
        /* Make the origin the upper left instead of the lower left */
        y = 1.0f - y;

        switch (type) {
        case COCOA_TOUCH_DOWN:
            SDL_SendFingerDown(touchId, fingerId, SDL_TRUE, x, y, 1);
            break;
        case COCOA_TOUCH_UP:
        case COCOA_TOUCH_CANCELLED:
            SDL_SendFingerDown(touchId, fingerId, SDL_FALSE, x, y, 1);
            break;
        case COCOA_TOUCH_MOVE:
            SDL_SendTouchMotion(touchId, fingerId, SDL_FALSE, x, y, 1);
            break;
        }
        
        touch = (NSTouch*)[enumerator nextObject];
    }
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6 */
}

@end

@interface SDLWindow : NSWindow
/* These are needed for borderless/fullscreen windows */
- (BOOL)canBecomeKeyWindow;
- (BOOL)canBecomeMainWindow;
@end

@implementation SDLWindow
- (BOOL)canBecomeKeyWindow
{
    return YES;
}

- (BOOL)canBecomeMainWindow
{
    return YES;
}
@end

@interface SDLView : NSView
/* The default implementation doesn't pass rightMouseDown to responder chain */
- (void)rightMouseDown:(NSEvent *)theEvent;
@end

@implementation SDLView
- (void)rightMouseDown:(NSEvent *)theEvent
{
    [[self nextResponder] rightMouseDown:theEvent];
}
@end

static unsigned int
GetWindowStyle(SDL_Window * window)
{
    unsigned int style;

	if (window->flags & SDL_WINDOW_FULLSCREEN) {
        style = NSBorderlessWindowMask;
	} else {
		if (window->flags & SDL_WINDOW_BORDERLESS) {
			style = NSBorderlessWindowMask;
		} else {
			style = (NSTitledWindowMask|NSClosableWindowMask|NSMiniaturizableWindowMask);
		}
		if (window->flags & SDL_WINDOW_RESIZABLE) {
			style |= NSResizableWindowMask;
		}
	}
    return style;
}

static int
SetupWindowData(_THIS, SDL_Window * window, NSWindow *nswindow, SDL_bool created)
{
    NSAutoreleasePool *pool;
    SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
    SDL_WindowData *data;

    /* Allocate the window data */
    data = (SDL_WindowData *) SDL_calloc(1, sizeof(*data));
    if (!data) {
        SDL_OutOfMemory();
        return -1;
    }
    data->window = window;
    data->nswindow = nswindow;
    data->created = created;
    data->videodata = videodata;

    pool = [[NSAutoreleasePool alloc] init];

    /* Create an event listener for the window */
    data->listener = [[Cocoa_WindowListener alloc] init];

    /* Fill in the SDL window with the window data */
    {
        NSRect rect = [nswindow contentRectForFrameRect:[nswindow frame]];
        NSView *contentView = [[SDLView alloc] initWithFrame:rect];
        [nswindow setContentView: contentView];
        [contentView release];

        ConvertNSRect(&rect);
        window->x = (int)rect.origin.x;
        window->y = (int)rect.origin.y;
        window->w = (int)rect.size.width;
        window->h = (int)rect.size.height;
    }

    /* Set up the listener after we create the view */
    [data->listener listen:data];

    if ([nswindow isVisible]) {
        window->flags |= SDL_WINDOW_SHOWN;
    } else {
        window->flags &= ~SDL_WINDOW_SHOWN;
    }
    {
        unsigned int style = [nswindow styleMask];

        if (style == NSBorderlessWindowMask) {
            window->flags |= SDL_WINDOW_BORDERLESS;
        } else {
            window->flags &= ~SDL_WINDOW_BORDERLESS;
        }
        if (style & NSResizableWindowMask) {
            window->flags |= SDL_WINDOW_RESIZABLE;
        } else {
            window->flags &= ~SDL_WINDOW_RESIZABLE;
        }
    }
    /* isZoomed always returns true if the window is not resizable */
    if ((window->flags & SDL_WINDOW_RESIZABLE) && [nswindow isZoomed]) {
        window->flags |= SDL_WINDOW_MAXIMIZED;
    } else {
        window->flags &= ~SDL_WINDOW_MAXIMIZED;
    }
    if ([nswindow isMiniaturized]) {
        window->flags |= SDL_WINDOW_MINIMIZED;
    } else {
        window->flags &= ~SDL_WINDOW_MINIMIZED;
    }
    if ([nswindow isKeyWindow]) {
        window->flags |= SDL_WINDOW_INPUT_FOCUS;
        SDL_SetKeyboardFocus(data->window);
    }

    /* All done! */
    [pool release];
    window->driverdata = data;
    return 0;
}

int
Cocoa_CreateWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow;
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    NSRect rect;
    SDL_Rect bounds;
    unsigned int style;

    Cocoa_GetDisplayBounds(_this, display, &bounds);
    rect.origin.x = window->x;
    rect.origin.y = window->y;
    rect.size.width = window->w;
    rect.size.height = window->h;
    ConvertNSRect(&rect);

    style = GetWindowStyle(window);

    /* Figure out which screen to place this window */
    NSArray *screens = [NSScreen screens];
    NSScreen *screen = nil;
    NSScreen *candidate;
    int i, count = [screens count];
    for (i = 0; i < count; ++i) {
        candidate = [screens objectAtIndex:i];
        NSRect screenRect = [candidate frame];
        if (rect.origin.x >= screenRect.origin.x &&
            rect.origin.x < screenRect.origin.x + screenRect.size.width &&
            rect.origin.y >= screenRect.origin.y &&
            rect.origin.y < screenRect.origin.y + screenRect.size.height) {
            screen = candidate;
            rect.origin.x -= screenRect.origin.x;
            rect.origin.y -= screenRect.origin.y;
        }
    }
    nswindow = [[SDLWindow alloc] initWithContentRect:rect styleMask:style backing:NSBackingStoreBuffered defer:YES screen:screen];

    [pool release];

    if (SetupWindowData(_this, window, nswindow, SDL_TRUE) < 0) {
        [nswindow release];
        return -1;
    }
    return 0;
}

int
Cocoa_CreateWindowFrom(_THIS, SDL_Window * window, const void *data)
{
    NSAutoreleasePool *pool;
    NSWindow *nswindow = (NSWindow *) data;
    NSString *title;

    pool = [[NSAutoreleasePool alloc] init];

    /* Query the title from the existing window */
    title = [nswindow title];
    if (title) {
        window->title = SDL_strdup([title UTF8String]);
    }

    [pool release];

    return SetupWindowData(_this, window, nswindow, SDL_FALSE);
}

void
Cocoa_SetWindowTitle(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;
    NSString *string;

    if(window->title) {
        string = [[NSString alloc] initWithUTF8String:window->title];
    } else {
        string = [[NSString alloc] init];
    }
    [nswindow setTitle:string];
    [string release];

    [pool release];
}

void
Cocoa_SetWindowIcon(_THIS, SDL_Window * window, SDL_Surface * icon)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSImage *nsimage = Cocoa_CreateImage(icon);

    if (nsimage) {
        [NSApp setApplicationIconImage:nsimage];
    }

    [pool release];
}

void
Cocoa_SetWindowPosition(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;
    NSRect rect;
    Uint32 moveHack;

    rect.origin.x = window->x;
    rect.origin.y = window->y;
    rect.size.width = window->w;
    rect.size.height = window->h;
    ConvertNSRect(&rect);

    moveHack = s_moveHack;
    s_moveHack = 0;
    [nswindow setFrameOrigin:rect.origin];
    s_moveHack = moveHack;

    [pool release];
}

void
Cocoa_SetWindowSize(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;
    NSSize size;

    size.width = window->w;
    size.height = window->h;
    [nswindow setContentSize:size];
    [pool release];
}

void
Cocoa_ShowWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    if (![nswindow isMiniaturized]) {
        [nswindow makeKeyAndOrderFront:nil];
    }
    [pool release];
}

void
Cocoa_HideWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    [nswindow orderOut:nil];
    [pool release];
}

void
Cocoa_RaiseWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    [nswindow makeKeyAndOrderFront:nil];
    [pool release];
}

void
Cocoa_MaximizeWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    [nswindow zoom:nil];
    [pool release];
}

void
Cocoa_MinimizeWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    [nswindow miniaturize:nil];
    [pool release];
}

void
Cocoa_RestoreWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    if ([nswindow isMiniaturized]) {
        [nswindow deminiaturize:nil];
    } else if ((window->flags & SDL_WINDOW_RESIZABLE) && [nswindow isZoomed]) {
        [nswindow zoom:nil];
    }
    [pool release];
}

static NSWindow *
Cocoa_RebuildWindow(SDL_WindowData * data, NSWindow * nswindow, unsigned style)
{
    if (!data->created) {
        /* Don't mess with other people's windows... */
        return nswindow;
    }

    [data->listener close];
    data->nswindow = [[SDLWindow alloc] initWithContentRect:[[nswindow contentView] frame] styleMask:style backing:NSBackingStoreBuffered defer:YES screen:[nswindow screen]];
    [data->nswindow setContentView:[nswindow contentView]];
    [data->listener listen:data];

    [nswindow close];

    return data->nswindow;
}

void
Cocoa_SetWindowFullscreen(_THIS, SDL_Window * window, SDL_VideoDisplay * display, SDL_bool fullscreen)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
    NSWindow *nswindow = data->nswindow;
    NSRect rect;

    /* The view responder chain gets messed with during setStyleMask */
    if ([[nswindow contentView] nextResponder] == data->listener) {
        [[nswindow contentView] setNextResponder:nil];
    }

    if (fullscreen) {
        SDL_Rect bounds;

        Cocoa_GetDisplayBounds(_this, display, &bounds);
        rect.origin.x = bounds.x;
        rect.origin.y = bounds.y;
        rect.size.width = bounds.w;
        rect.size.height = bounds.h;
        ConvertNSRect(&rect);

        /* Hack to fix origin on Mac OS X 10.4 */
        NSRect screenRect = [[nswindow screen] frame];
        if (screenRect.size.height >= 1.0f) {
            rect.origin.y += (screenRect.size.height - rect.size.height);
        }

        if ([nswindow respondsToSelector: @selector(setStyleMask:)]) {
            [nswindow performSelector: @selector(setStyleMask:) withObject: (id)NSBorderlessWindowMask];
        } else {
            nswindow = Cocoa_RebuildWindow(data, nswindow, NSBorderlessWindowMask);
        }
    } else {
        rect.origin.x = window->windowed.x;
        rect.origin.y = window->windowed.y;
        rect.size.width = window->windowed.w;
        rect.size.height = window->windowed.h;
        ConvertNSRect(&rect);

        if ([nswindow respondsToSelector: @selector(setStyleMask:)]) {
            [nswindow performSelector: @selector(setStyleMask:) withObject: (id)(uintptr_t)GetWindowStyle(window)];
        } else {
            nswindow = Cocoa_RebuildWindow(data, nswindow, GetWindowStyle(window));
        }
    }

    /* The view responder chain gets messed with during setStyleMask */
    if ([[nswindow contentView] nextResponder] != data->listener) {
        [[nswindow contentView] setNextResponder:data->listener];
    }

    s_moveHack = 0;
    [nswindow setFrameOrigin:rect.origin];
    [nswindow setContentSize:rect.size];
    s_moveHack = SDL_GetTicks();

    /* When the window style changes the title is cleared */
    if (!fullscreen) {
        Cocoa_SetWindowTitle(_this, window);
    }

#ifdef FULLSCREEN_TOGGLEABLE
    if (fullscreen) {
        /* OpenGL is rendering to the window, so make it visible! */
        [nswindow setLevel:CGShieldingWindowLevel()];
    } else {
        [nswindow setLevel:kCGNormalWindowLevel];
    }
#endif
    [nswindow makeKeyAndOrderFront:nil];

    [pool release];
}

int
Cocoa_SetWindowGammaRamp(_THIS, SDL_Window * window, const Uint16 * ramp)
{
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    CGDirectDisplayID display_id = ((SDL_DisplayData *)display->driverdata)->display;
    const uint32_t tableSize = 256;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];
    uint32_t i;
    float inv65535 = 1.0f / 65535.0f;

    /* Extract gamma values into separate tables, convert to floats between 0.0 and 1.0 */
    for (i = 0; i < 256; i++) {
        redTable[i] = ramp[0*256+i] * inv65535;
        greenTable[i] = ramp[1*256+i] * inv65535;
        blueTable[i] = ramp[2*256+i] * inv65535;
    }

    if (CGSetDisplayTransferByTable(display_id, tableSize,
                                    redTable, greenTable, blueTable) != CGDisplayNoErr) {
        SDL_SetError("CGSetDisplayTransferByTable()");
        return -1;
    }
    return 0;
}

int
Cocoa_GetWindowGammaRamp(_THIS, SDL_Window * window, Uint16 * ramp)
{
    SDL_VideoDisplay *display = SDL_GetDisplayForWindow(window);
    CGDirectDisplayID display_id = ((SDL_DisplayData *)display->driverdata)->display;
    const uint32_t tableSize = 256;
    CGGammaValue redTable[tableSize];
    CGGammaValue greenTable[tableSize];
    CGGammaValue blueTable[tableSize];
    uint32_t i, tableCopied;

    if (CGGetDisplayTransferByTable(display_id, tableSize,
                                    redTable, greenTable, blueTable, &tableCopied) != CGDisplayNoErr) {
        SDL_SetError("CGGetDisplayTransferByTable()");
        return -1;
    }

    for (i = 0; i < tableCopied; i++) {
        ramp[0*256+i] = (Uint16)(redTable[i] * 65535.0f);
        ramp[1*256+i] = (Uint16)(greenTable[i] * 65535.0f);
        ramp[2*256+i] = (Uint16)(blueTable[i] * 65535.0f);
    }
    return 0;
}

void
Cocoa_SetWindowGrab(_THIS, SDL_Window * window)
{
    /* Move the cursor to the nearest point in the window */
    if ((window->flags & SDL_WINDOW_INPUT_GRABBED) &&
        (window->flags & SDL_WINDOW_INPUT_FOCUS)) {
        int x, y;
        CGPoint cgpoint;

        SDL_GetMouseState(&x, &y);
        cgpoint.x = window->x + x;
        cgpoint.y = window->y + y;
        CGDisplayMoveCursorToPoint(kCGDirectMainDisplay, cgpoint);
    }
}

void
Cocoa_DestroyWindow(_THIS, SDL_Window * window)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;

    if (data) {
        [data->listener close];
        [data->listener release];
        if (data->created) {
            [data->nswindow close];
        }
        SDL_free(data);
    }
    [pool release];
}

SDL_bool
Cocoa_GetWindowWMInfo(_THIS, SDL_Window * window, SDL_SysWMinfo * info)
{
    NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

    if (info->version.major <= SDL_MAJOR_VERSION) {
        info->subsystem = SDL_SYSWM_COCOA;
        info->info.cocoa.window = nswindow;
        return SDL_TRUE;
    } else {
        SDL_SetError("Application not compiled with SDL %d.%d\n",
                     SDL_MAJOR_VERSION, SDL_MINOR_VERSION);
        return SDL_FALSE;
    }
}

/* vi: set ts=4 sw=4 expandtab: */