/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2003  Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public

    License along with this library; if not, write to the Free

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_QuartzVideo.h"

struct WMcursor {

    Cursor curs;

};

void QZ_FreeWMCursor     (_THIS, WMcursor *cursor) { 

    if ( cursor != NULL )

        free (cursor);

}

/* Use the Carbon cursor routines for now */

WMcursor*    QZ_CreateWMCursor   (_THIS, Uint8 *data, Uint8 *mask, 

                                         int w, int h, int hot_x, int hot_y) { 

    WMcursor *cursor;

    int row, bytes;

    /* Allocate the cursor memory */

    cursor = (WMcursor *)malloc(sizeof(WMcursor));

    if ( cursor == NULL ) {

        SDL_OutOfMemory();

        return(NULL);

    }

    memset(cursor, 0, sizeof(*cursor));

    if (w > 16)

        w = 16;

    if (h > 16)

        h = 16;

    bytes = (w+7)/8;

    for ( row=0; row<h; ++row ) {

        memcpy(&cursor->curs.data[row], data, bytes);

        data += bytes;

    }

    for ( row=0; row<h; ++row ) {

        memcpy(&cursor->curs.mask[row], mask, bytes);

        mask += bytes;

    }

    cursor->curs.hotSpot.h = hot_x;

    cursor->curs.hotSpot.v = hot_y;

    return(cursor);

}

void QZ_ShowMouse (_THIS) {

    if (!cursor_visible) {

        [ NSCursor unhide ];

        cursor_visible = YES;

    }

}

void QZ_HideMouse (_THIS) {

    BOOL isInGameWin = QZ_IsMouseInWindow (this);

    if (isInGameWin && cursor_visible) {

        [ NSCursor hide ];

        cursor_visible = NO;

    }

}

BOOL QZ_IsMouseInWindow (_THIS) {

    return (mode_flags & SDL_FULLSCREEN) ? true : NSPointInRect([ qz_window mouseLocationOutsideOfEventStream ], [ window_view frame ]);

}

int QZ_ShowWMCursor (_THIS, WMcursor *cursor) { 

    if ( cursor == NULL) {

        if ( cursor_should_be_visible ) {

            QZ_HideMouse (this);

            cursor_should_be_visible = NO;

            QZ_ChangeGrabState (this, QZ_HIDECURSOR);

        }

    }

    else {

        SetCursor(&cursor->curs);

        if ( ! cursor_should_be_visible ) {

            QZ_ShowMouse (this);

            cursor_should_be_visible = YES;

            QZ_ChangeGrabState (this, QZ_SHOWCURSOR);

        }

    }

    return 1;

}

/*

    Coordinate conversion functions, for convenience

    Cocoa sets the origin at the lower left corner of the window/screen

    SDL, CoreGraphics/WindowServer, and QuickDraw use the origin at the upper left corner

    The routines were written so they could be called before SetVideoMode() has finished;

    this might have limited usefulness at the moment, but the extra cost is trivial.

*/

/* Convert Cocoa screen coordinate to Cocoa window coordinate */

void QZ_PrivateGlobalToLocal (_THIS, NSPoint *p) {

    *p = [ qz_window convertScreenToBase:*p ];

}

/* Convert Cocoa window coordinate to Cocoa screen coordinate */

void QZ_PrivateLocalToGlobal (_THIS, NSPoint *p) {

    *p = [ qz_window convertBaseToScreen:*p ];

}

/* Convert SDL coordinate to Cocoa coordinate */

void QZ_PrivateSDLToCocoa (_THIS, NSPoint *p) {

    if ( CGDisplayIsCaptured (display_id) ) { /* capture signals fullscreen */

    }

    else {

        NSPoint newPoint;

        newPoint = [ window_view convertPoint:*p toView:[ qz_window contentView ] ];

        *p = newPoint;

    }

}

/* Convert Cocoa coordinate to SDL coordinate */

void QZ_PrivateCocoaToSDL (_THIS, NSPoint *p) {

    if ( CGDisplayIsCaptured (display_id) ) { /* capture signals fullscreen */

    }

    else {

        NSPoint newPoint;

        newPoint = [ window_view convertPoint:*p fromView:[ qz_window contentView ] ];

        *p = newPoint;

    }

}

/* Convert SDL coordinate to window server (CoreGraphics) coordinate */

CGPoint QZ_PrivateSDLToCG (_THIS, NSPoint *p) {

    CGPoint cgp;

    if ( ! CGDisplayIsCaptured (display_id) ) { /* not captured => not fullscreen => local coord */

        int height;

        QZ_PrivateSDLToCocoa (this, p);

        QZ_PrivateLocalToGlobal (this, p);

        height = CGDisplayPixelsHigh (display_id);

        p->y = height - p->y;

    }

    cgp.x = p->x;

    cgp.y = p->y;

    return cgp;

}

#if 0 /* Dead code */

/* Convert window server (CoreGraphics) coordinate to SDL coordinate */

void QZ_PrivateCGToSDL (_THIS, NSPoint *p) {

    if ( ! CGDisplayIsCaptured (display_id) ) { /* not captured => not fullscreen => local coord */

        int height;

        /* Convert CG Global to Cocoa Global */

        height = CGDisplayPixelsHigh (display_id);

        p->y = height - p->y;

        QZ_PrivateGlobalToLocal (this, p);

        QZ_PrivateCocoaToSDL (this, p);

    }

}

#endif /* Dead code */

void  QZ_PrivateWarpCursor (_THIS, int x, int y) {

    NSPoint p;

    CGPoint cgp;

    p = NSMakePoint (x, y);

    cgp = QZ_PrivateSDLToCG (this, &p);

    /* this is the magic call that fixes cursor "freezing" after warp */

    CGSetLocalEventsSuppressionInterval (0.0);

    CGWarpMouseCursorPosition (cgp);

}

void QZ_WarpWMCursor (_THIS, Uint16 x, Uint16 y) {

    /* Only allow warping when in foreground */

    if ( ! [ NSApp isActive ] )

        return;

    /* Do the actual warp */

    QZ_PrivateWarpCursor (this, x, y);

    /* Generate the mouse moved event */

    SDL_PrivateMouseMotion (0, 0, x, y);

}

void QZ_MoveWMCursor     (_THIS, int x, int y) { }

void QZ_CheckMouseMode   (_THIS) { }

void QZ_SetCaption    (_THIS, const char *title, const char *icon) {

    if ( qz_window != nil ) {

        NSString *string;

        if ( title != NULL ) {

            string = [ [ NSString alloc ] initWithCString:title ];

            [ qz_window setTitle:string ];

            [ string release ];

        }

        if ( icon != NULL ) {

            string = [ [ NSString alloc ] initWithCString:icon ];

            [ qz_window setMiniwindowTitle:string ];

            [ string release ];

        }

    }

}

void QZ_SetIcon       (_THIS, SDL_Surface *icon, Uint8 *mask)

{

    NSBitmapImageRep *imgrep;

    NSImage *img;

    SDL_Surface *mergedSurface;

    int i,j;

    NSAutoreleasePool *pool;

    SDL_Rect rrect;

    NSSize imgSize = {icon->w, icon->h};

    pool = [ [ NSAutoreleasePool alloc ] init ];

    SDL_GetClipRect(icon, &rrect);

    /* create a big endian RGBA surface */

    mergedSurface = SDL_CreateRGBSurface(SDL_SWSURFACE|SDL_SRCALPHA, 

                    icon->w, icon->h, 32, 0xff<<24, 0xff<<16, 0xff<<8, 0xff<<0);

    if (mergedSurface==NULL) {

        NSLog(@"Error creating surface for merge");

        goto freePool;

    }

    if (mergedSurface->pitch != 

        mergedSurface->format->BytesPerPixel * mergedSurface->w) {

        SDL_SetError ("merged surface has wrong format");

        SDL_FreeSurface (mergedSurface);

        goto freePool;

    }

    if (SDL_BlitSurface(icon,&rrect,mergedSurface,&rrect)) {

        NSLog(@"Error blitting to mergedSurface");

        goto freePool;

    }

    if (mask) {

        Uint32 *pixels = mergedSurface->pixels;

        for (i = 0; i < mergedSurface->h; i++) {

            for (j = 0; j < mergedSurface->w; j++) {

                int index = i * mergedSurface->w + j;

                int mindex = index >> 3;

                int bindex = 7 - (index & 0x7);

                if (mask[mindex] & (1 << bindex))

                    pixels[index] |= 0x000000FF;

                else

                    pixels[index] &= 0xFFFFFF00;

            }

        }

    }

    imgrep = [ [ NSBitmapImageRep alloc] 

                    initWithBitmapDataPlanes:(unsigned char **)&mergedSurface->pixels 

                        pixelsWide:icon->w pixelsHigh:icon->h bitsPerSample:8 samplesPerPixel:4 

                        hasAlpha:YES isPlanar:NO colorSpaceName:NSDeviceRGBColorSpace 

                        bytesPerRow:icon->w<<2 bitsPerPixel:32 ];

    img = [ [ NSImage alloc ] initWithSize:imgSize ];

    [ img addRepresentation: imgrep ];

    [ NSApp setApplicationIconImage:img ];

    [ img release ];

    [ imgrep release ];

    SDL_FreeSurface(mergedSurface);

freePool:

    [pool release];

}

int  QZ_IconifyWindow (_THIS) { 

    if ( ! [ qz_window isMiniaturized ] ) {

        [ qz_window miniaturize:nil ];

        return 1;

    }

    else {

        SDL_SetError ("window already iconified");

        return 0;

    }

}

/*

int  QZ_GetWMInfo  (_THIS, SDL_SysWMinfo *info) { 

    info->nsWindowPtr = qz_window;

    return 0; 

}*/

void QZ_ChangeGrabState (_THIS, int action) {

    /* 

        Figure out what the next state should be based on the action.

        Ignore actions that can't change the current state.

    */

    if ( grab_state == QZ_UNGRABBED ) {

        if ( action == QZ_ENABLE_GRAB ) {

            if ( cursor_should_be_visible )

                grab_state = QZ_VISIBLE_GRAB;

            else

                grab_state = QZ_INVISIBLE_GRAB;

        }

    }

    else if ( grab_state == QZ_VISIBLE_GRAB ) {

        if ( action == QZ_DISABLE_GRAB )

            grab_state = QZ_UNGRABBED;

        else if ( action == QZ_HIDECURSOR )

            grab_state = QZ_INVISIBLE_GRAB;

    }

    else {

        assert( grab_state == QZ_INVISIBLE_GRAB );

        if ( action == QZ_DISABLE_GRAB )

            grab_state = QZ_UNGRABBED;

        else if ( action == QZ_SHOWCURSOR )

            grab_state = QZ_VISIBLE_GRAB;

    }

    /* now apply the new state */

    if (grab_state == QZ_UNGRABBED) {

        CGAssociateMouseAndMouseCursorPosition (1);

    }

    else if (grab_state == QZ_VISIBLE_GRAB) {

        CGAssociateMouseAndMouseCursorPosition (1);

    }

    else {

        assert( grab_state == QZ_INVISIBLE_GRAB );

        QZ_PrivateWarpCursor (this, SDL_VideoSurface->w / 2, SDL_VideoSurface->h / 2);

        CGAssociateMouseAndMouseCursorPosition (0);

    }

}

SDL_GrabMode QZ_GrabInput (_THIS, SDL_GrabMode grab_mode) {

    int doGrab = grab_mode & SDL_GRAB_ON;

    /*int fullscreen = grab_mode & SDL_GRAB_FULLSCREEN;*/

    if ( this->screen == NULL ) {

        SDL_SetError ("QZ_GrabInput: screen is NULL");

        return SDL_GRAB_OFF;

    }

    if ( ! video_set ) {

        /*SDL_SetError ("QZ_GrabInput: video is not set, grab will take effect on mode switch"); */

        current_grab_mode = grab_mode;

        return grab_mode;       /* Will be set later on mode switch */

    }

    if ( grab_mode != SDL_GRAB_QUERY ) {

        if ( doGrab )

            QZ_ChangeGrabState (this, QZ_ENABLE_GRAB);

        else

            QZ_ChangeGrabState (this, QZ_DISABLE_GRAB);

        current_grab_mode = doGrab ? SDL_GRAB_ON : SDL_GRAB_OFF;

    }

    return current_grab_mode;

}