/*

     SDL - Simple DirectMedia Layer

     Copyright (C) 1997-2009 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_sysvideo.h"

 #include "../../events/SDL_keyboard_c.h"

 #include "../../events/SDL_mouse_c.h"

 #include "../../events/SDL_windowevents_c.h"

 #include "SDL_cocoavideo.h"

 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;

     _data = data;

     center = [NSNotificationCenter defaultCenter];

     [_data->nswindow setNextResponder:self];

     if ([_data->nswindow delegate] != nil) {

         [center addObserver:self selector:@selector(windowDisExpose:) name:NSWindowDidExposeNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidMove:) name:NSWindowDidMoveNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidResize:) name:NSWindowDidResizeNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidMiniaturize:) name:NSWindowDidMiniaturizeNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidDeminiaturize:) name:NSWindowDidDeminiaturizeNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidBecomeKey:) name:NSWindowDidBecomeKeyNotification object:_data->nswindow];

         [center addObserver:self selector:@selector(windowDidResignKey:) name:NSWindowDidResignKeyNotification object:_data->nswindow];

     } else {

         [_data->nswindow setDelegate:self];

     }

     [center addObserver:self selector:@selector(windowDidHide:) name:NSApplicationDidHideNotification object:NSApp];

     [center addObserver:self selector:@selector(windowDidUnhide:) name:NSApplicationDidUnhideNotification object:NSApp];

     [_data->nswindow setAcceptsMouseMovedEvents:YES];

 }

 - (void)close

 {

     NSNotificationCenter *center;

     center = [NSNotificationCenter defaultCenter];

     [_data->nswindow setNextResponder:nil];

     if ([_data->nswindow delegate] != self) {

         [center removeObserver:self name:NSWindowDidExposeNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidMoveNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidResizeNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidMiniaturizeNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidDeminiaturizeNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidBecomeKeyNotification object:_data->nswindow];

         [center removeObserver:self name:NSWindowDidResignKeyNotification object:_data->nswindow];

     } else {

         [_data->nswindow setDelegate:nil];

     }

     [center removeObserver:self name:NSApplicationDidHideNotification object:NSApp];

     [center removeObserver:self name:NSApplicationDidUnhideNotification object:NSApp];

 }

 - (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;

     NSRect rect = [_data->nswindow contentRectForFrameRect:[_data->nswindow frame]];

     ConvertNSRect(&rect);

     x = (int)rect.origin.x;

     y = (int)rect.origin.y;

     SDL_SendWindowEvent(_data->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;

     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

 {

     /* We're going to get keyboard events, since we're key. */

     SDL_SetKeyboardFocus(_data->window);

 }

 - (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)windowDidHide:(NSNotification *)aNotification

 {

     SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);

 }

 - (void)windowDidUnhide:(NSNotification *)aNotification

 {

     SDL_SendWindowEvent(_data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);

 }

 - (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];

         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];

         break;

     }

     SDL_SendMouseButton(_data->window, SDL_RELEASED, button);

 }

 - (void)rightMouseUp:(NSEvent *)theEvent

 {

     [self mouseUp:theEvent];

 }

 - (void)otherMouseUp:(NSEvent *)theEvent

 {

     [self mouseUp:theEvent];

 }

 - (void)mouseMoved:(NSEvent *)theEvent

 {

     SDL_Window *window = _data->window;

     NSPoint point;

     point = [theEvent locationInWindow];

     point.y = window->h - point.y;

     if ( point.x < 0 || point.x >= window->w ||

          point.y < 0 || point.y >= window->h ) {

         if (SDL_GetMouseFocus() == window) {

             SDL_SetMouseFocus(NULL);

         }

     } else {

         SDL_SendMouseMotion(window, 0, (int)point.x, (int)point.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

 {

     float x = [theEvent deltaX];

     float y = [theEvent deltaY];

     if (x > 0) {

         x += 0.9f;

     } else if (x < 0) {

         x -= 0.9f;

     }

     if (y > 0) {

         y += 0.9f;

     } else if (y < 0) {

         y -= 0.9f;

     }

     SDL_SendMouseWheel(_data->window, (int)x, (int)y);

 }

 @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

 static int

 SetupWindowData(_THIS, SDL_Window * window, NSWindow *nswindow, SDL_bool created)

 {

     NSAutoreleasePool *pool;

     SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;

     SDL_VideoDisplay *display = window->display;

     SDL_DisplayData *displaydata = (SDL_DisplayData *) display->driverdata;

     SDL_WindowData *data;

     /* Allocate the window data */

     data = (SDL_WindowData *) SDL_malloc(sizeof(*data));

     if (!data) {

         SDL_OutOfMemory();

         return -1;

     }

     data->window = window;

     data->nswindow = nswindow;

     data->created = created;

     data->display = displaydata->display;

     data->videodata = videodata;

     pool = [[NSAutoreleasePool alloc] init];

     /* Create an event listener for the window */

     data->listener = [[Cocoa_WindowListener alloc] init];

     [data->listener listen:data];

     /* Fill in the SDL window with the window data */

     {

         SDL_Rect bounds;

         NSRect rect = [nswindow contentRectForFrameRect:[nswindow frame]];

         ConvertNSRect(&rect);

         Cocoa_GetDisplayBounds(_this, display, &bounds);

         window->x = (int)rect.origin.x - bounds.x;

         window->y = (int)rect.origin.y - bounds.y;

         window->w = (int)rect.size.width;

         window->h = (int)rect.size.height;

     }

     if ([nswindow isVisible]) {

         window->flags |= SDL_WINDOW_SHOWN;

     } else {

         window->flags &= ~SDL_WINDOW_SHOWN;

     }

     {

         unsigned int style = [nswindow styleMask];

         if ((style & ~NSResizableWindowMask) == 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;

         }

     }

     if ([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);

         if (window->flags & SDL_WINDOW_INPUT_GRABBED) {

             /* FIXME */

         }

     }

     /* 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 = window->display;

     NSRect rect;

     SDL_Rect bounds;

     unsigned int style;

     Cocoa_GetDisplayBounds(_this, display, &bounds);

     if ((window->flags & SDL_WINDOW_FULLSCREEN)

         || window->x == SDL_WINDOWPOS_CENTERED) {

         rect.origin.x = bounds.x + (bounds.w - window->w) / 2;

     } else if (window->x == SDL_WINDOWPOS_UNDEFINED) {

         rect.origin.x = bounds.x;

     } else {

         rect.origin.x = bounds.x + window->x;

     }

     if ((window->flags & SDL_WINDOW_FULLSCREEN)

         || window->y == SDL_WINDOWPOS_CENTERED) {

         rect.origin.y = bounds.y + (bounds.h - window->h) / 2;

     } else if (window->x == SDL_WINDOWPOS_UNDEFINED) {

         rect.origin.y = bounds.y;

     } else {

         rect.origin.y = bounds.y + window->y;

     }

     rect.size.width = window->w;

     rect.size.height = window->h;

     ConvertNSRect(&rect);

     if (window->flags & SDL_WINDOW_BORDERLESS) {

         style = NSBorderlessWindowMask;

     } else {

         style = (NSTitledWindowMask|NSClosableWindowMask|NSMiniaturizableWindowMask);

     }

     if (window->flags & SDL_WINDOW_RESIZABLE) {

         style |= NSResizableWindowMask;

     }

     /* 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:FALSE 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_SetWindowPosition(_THIS, SDL_Window * window)

 {

     NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

     NSWindow *nswindow = ((SDL_WindowData *) window->driverdata)->nswindow;

     SDL_VideoDisplay *display = window->display;

     NSRect rect;

     SDL_Rect bounds;

     Cocoa_GetDisplayBounds(_this, display, &bounds);

     if ((window->flags & SDL_WINDOW_FULLSCREEN)

         || window->x == SDL_WINDOWPOS_CENTERED) {

         rect.origin.x = bounds.x + (bounds.w - window->w) / 2;

     } else {

         rect.origin.x = bounds.x + window->x;

     }

     if ((window->flags & SDL_WINDOW_FULLSCREEN)

         || window->y == SDL_WINDOWPOS_CENTERED) {

         rect.origin.y = bounds.y + (bounds.h - window->h) / 2;

     } else {

         rect.origin.y = bounds.y + window->y;

     }

     rect.size.width = window->w;

     rect.size.height = window->h;

     ConvertNSRect(&rect);

     rect = [nswindow frameRectForContentRect:rect];

     [nswindow setFrameOrigin:rect.origin];

     [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 ([nswindow isZoomed]) {

         [nswindow zoom:nil];

     }

     [pool release];

 }

 void

 Cocoa_SetWindowGrab(_THIS, SDL_Window * window)

 {

     if ((window->flags & SDL_WINDOW_INPUT_GRABBED) &&

         (window->flags & SDL_WINDOW_INPUT_FOCUS)) {

         /* FIXME: Grab mouse */

     } else {

         /* FIXME: Release mouse */

     }

 }

 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->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: */