/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2010 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_touch_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];

    [[_data->nswindow contentView] setAcceptsTouchEvents: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);

    /* 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)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);

}

- (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

{

    NSSet *touches = [event touchesMatchingPhase:NSTouchPhaseBegan inView:nil];

    NSEnumerator *enumerator = [touches objectEnumerator];

    NSTouch *touch = (NSTouch*)[enumerator nextObject];

    while (touch) {

        long touchId = (long)[touch device];

        if (!SDL_GetTouch(touchId)) {

            SDL_Touch touch;

            touch.id = touchId;

            touch.x_min = 0;

            touch.x_max = 1;

            touch.xres = touch.x_max - touch.x_min;

            touch.y_min = 0;

            touch.y_max = 1;

            touch.yres = touch.y_max - touch.y_min;

            touch.pressure_min = 0;

            touch.pressure_max = 1;

            touch.pressureres = touch.pressure_max - touch.pressure_min;

            if (SDL_AddTouch(&touch, "") < 0) {

                continue;

            }

        } 

        float x = [touch normalizedPosition].x;

        float y = [touch normalizedPosition].y;

        long fingerId = (long)[touch identity];

        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];

    }

}

@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: */