/*

  Simple DirectMedia Layer

  Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied

  warranty.  In no event will the authors be held liable for any damages

  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,

  including commercial applications, and to alter it and redistribute it

  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not

     claim that you wrote the original software. If you use this software

     in a product, an acknowledgment in the product documentation would be

     appreciated but is not required.

  2. Altered source versions must be plainly marked as such, and must not be

     misrepresented as being the original software.

  3. This notice may not be removed or altered from any source distribution.

*/

#include "SDL_config.h"

#if SDL_VIDEO_DRIVER_COCOA

#include "SDL_events.h"

#include "SDL_cocoavideo.h"

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

static SDL_Cursor *

Cocoa_CreateDefaultCursor()

{

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

    NSCursor *nscursor;

    SDL_Cursor *cursor = NULL;

    nscursor = [NSCursor arrowCursor];

    if (nscursor) {

        cursor = SDL_calloc(1, sizeof(*cursor));

        if (cursor) {

            cursor->driverdata = nscursor;

            [nscursor retain];

        }

    }

    [pool release];

    return cursor;

}

static SDL_Cursor *

Cocoa_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)

{

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

    NSImage *nsimage;

    NSCursor *nscursor = NULL;

    SDL_Cursor *cursor = NULL;

    nsimage = Cocoa_CreateImage(surface);

    if (nsimage) {

        nscursor = [[NSCursor alloc] initWithImage: nsimage hotSpot: NSMakePoint(hot_x, hot_y)];

    }

    if (nscursor) {

        cursor = SDL_calloc(1, sizeof(*cursor));

        if (cursor) {

            cursor->driverdata = nscursor;

        }

    }

    [pool release];

    return cursor;

}

static void

Cocoa_FreeCursor(SDL_Cursor * cursor)

{

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

    NSCursor *nscursor = (NSCursor *)cursor->driverdata;

    [nscursor release];

    SDL_free(cursor);

    [pool release];

}

static int

Cocoa_ShowCursor(SDL_Cursor * cursor)

{

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

    if (SDL_GetMouseFocus()) {

        if (cursor) {

            NSCursor *nscursor = (NSCursor *)cursor->driverdata;

            [nscursor set];

            [NSCursor unhide];

        } else {

            [NSCursor hide];

        }

    }

    [pool release];

    return 0;

}

static void

Cocoa_WarpMouse(SDL_Window * window, int x, int y)

{

    CGPoint point;

    point.x = (float)window->x + x;

    point.y = (float)window->y + y;

    CGWarpMouseCursorPosition(point);

}

static int

Cocoa_SetRelativeMouseMode(SDL_bool enabled)

{

    CGError result;

    if (enabled) {

        result = CGAssociateMouseAndMouseCursorPosition(NO);

    } else {

        result = CGAssociateMouseAndMouseCursorPosition(YES);

    }

    if (result != kCGErrorSuccess) {

        SDL_SetError("CGAssociateMouseAndMouseCursorPosition() failed");

        return -1;

    }

    return 0;

}

void

Cocoa_InitMouse(_THIS)

{

    SDL_Mouse *mouse = SDL_GetMouse();

    mouse->CreateCursor = Cocoa_CreateCursor;

    mouse->ShowCursor = Cocoa_ShowCursor;

    mouse->FreeCursor = Cocoa_FreeCursor;

    mouse->WarpMouse = Cocoa_WarpMouse;

    mouse->SetRelativeMouseMode = Cocoa_SetRelativeMouseMode;

    SDL_SetDefaultCursor(Cocoa_CreateDefaultCursor());

}

void

Cocoa_HandleMouseEvent(_THIS, NSEvent *event)

{

    SDL_Mouse *mouse = SDL_GetMouse();

    if (mouse->relative_mode &&

        ([event type] == NSMouseMoved ||

         [event type] == NSLeftMouseDragged ||

         [event type] == NSRightMouseDragged ||

         [event type] == NSOtherMouseDragged)) {

        float x = [event deltaX];

        float y = [event deltaY];

        SDL_SendMouseMotion(mouse->focus, 1, (int)x, (int)y);

    }

}

void

Cocoa_HandleMouseWheel(SDL_Window *window, NSEvent *event)

{

    float x = [event deltaX];

    float y = [event 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(window, (int)x, (int)y);

}

void

Cocoa_QuitMouse(_THIS)

{

}

#endif /* SDL_VIDEO_DRIVER_COCOA */

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