/*

    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"

/* General mouse handling code for SDL */

#include "SDL_events.h"

#include "SDL_events_c.h"

#include "default_cursor.h"

#include "../video/SDL_sysvideo.h"

/* Public functions */

int

SDL_MouseInit(void)

{

    return (0);

}

{

}

{

}

void

{

        return;

    }

    /* See if the current window has lost focus */

    if (mouse->focus) {

    }

    mouse->focus = window;

    if (mouse->focus) {

    }

}

int

{

    int posted;

    int xrel;

    int yrel;

    int x_max = 0, y_max = 0;

    /* the relative motion is calculated regarding the system cursor last position */

    if (relative) {

        xrel = x;

        yrel = y;

        x = (mouse->last_x + x);

        y = (mouse->last_y + y);

    } else {

        xrel = x - mouse->last_x;

        yrel = y - mouse->last_y;

    }

    /* Drop events that don't change state */

    if (!xrel && !yrel) {

#if 0

        printf("Mouse event didn't change state - dropped!\n");

#endif

        return 0;

    }

    /* Update internal mouse coordinates */

    if (mouse->relative_mode == SDL_FALSE) {

        mouse->x = x;

        mouse->y = y;

    } else {

        mouse->x += xrel;

        mouse->y += yrel;

    }

    SDL_GetWindowSize(mouse->focus, &x_max, &y_max);

    /* make sure that the pointers find themselves inside the windows */

    /* only check if mouse->xmax is set ! */

    if (x_max && mouse->x > x_max) {

        mouse->x = x_max;

    } else if (mouse->x < 0) {

        mouse->x = 0;

    }

    if (y_max && mouse->y > y_max) {

        mouse->y = y_max;

    } else if (mouse->y < 0) {

        mouse->y = 0;

    }

    mouse->xdelta += xrel;

    mouse->ydelta += yrel;

    /* Move the mouse cursor, if needed */

    if (mouse->cursor_shown && !mouse->relative_mode &&

        mouse->MoveCursor && mouse->cur_cursor) {

        mouse->MoveCursor(mouse->cur_cursor);

    }

    /* Post the event, if desired */

    posted = 0;

        SDL_Event event;

        event.motion.type = SDL_MOUSEMOTION;

        event.motion.state = mouse->buttonstate;

        event.motion.x = mouse->x;

        event.motion.y = mouse->y;

        event.motion.xrel = xrel;

        event.motion.yrel = yrel;

        posted = (SDL_PushEvent(&event) > 0);

    }

    mouse->last_x = mouse->x;

    mouse->last_y = mouse->y;

    return posted;

}

int

{

    int posted;

    Uint32 type;

    /* Figure out which event to perform */

    switch (state) {

    case SDL_PRESSED:

        if (mouse->buttonstate & SDL_BUTTON(button)) {

            /* Ignore this event, no state change */

            return 0;

        }

        type = SDL_MOUSEBUTTONDOWN;

        mouse->buttonstate |= SDL_BUTTON(button);

        break;

    case SDL_RELEASED:

        if (!(mouse->buttonstate & SDL_BUTTON(button))) {

            /* Ignore this event, no state change */

            return 0;

        }

        type = SDL_MOUSEBUTTONUP;

        mouse->buttonstate &= ~SDL_BUTTON(button);

        break;

    default:

        /* Invalid state -- bail */

        return 0;

    }

    /* Post the event, if desired */

    posted = 0;

    if (SDL_GetEventState(type) == SDL_ENABLE) {

        SDL_Event event;

        event.type = type;

        event.button.state = state;

        event.button.button = button;

        event.button.x = mouse->x;

        event.button.y = mouse->y;

        event.button.windowID = mouse->focus ? mouse->focus->id : 0;

        posted = (SDL_PushEvent(&event) > 0);

    }

    return posted;

}

int

{

    int posted;

        return 0;

    }

    /* Post the event, if desired */

    posted = 0;

    if (SDL_GetEventState(SDL_MOUSEWHEEL) == SDL_ENABLE) {

        SDL_Event event;

        event.type = SDL_MOUSEWHEEL;

        event.wheel.x = x;

        event.wheel.y = y;

        posted = (SDL_PushEvent(&event) > 0);

    }

    return posted;

}

void

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

{

    if (mouse->WarpMouse) {

        mouse->WarpMouse(mouse, window, x, y);

    } else {

    }

}

SDL_Cursor *

SDL_CreateCursor(const Uint8 * data, const Uint8 * mask,

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

{

    SDL_Surface *surface;

    SDL_Cursor *cursor;

    int x, y;

    Uint32 *pixel;

    const Uint32 black = 0xFF000000;

    const Uint32 white = 0xFFFFFFFF;

    const Uint32 transparent = 0x00000000;

    if (!mouse->CreateCursor) {

        return NULL;

    }

    /* Sanity check the hot spot */

    if ((hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h)) {

        SDL_SetError("Cursor hot spot doesn't lie within cursor");

        return NULL;

    }

    /* Make sure the width is a multiple of 8 */

    w = ((w + 7) & ~7);

    /* Create the surface from a bitmap */

    surface =

        SDL_CreateRGBSurface(0, w, h, 32, 0x00FF0000, 0x0000FF00, 0x000000FF,

                             0xFF000000);

    if (!surface) {

        return NULL;

    }

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

        pixel = (Uint32 *) ((Uint8 *) surface->pixels + y * surface->pitch);

        for (x = 0; x < w; ++x) {

            if ((x % 8) == 0) {

                datab = *data++;

                maskb = *mask++;

            }

            if (maskb & 0x80) {

                *pixel++ = (datab & 0x80) ? black : white;

            } else {

                *pixel++ = (datab & 0x80) ? black : transparent;

            }

            datab <<= 1;

            maskb <<= 1;

        }

    }

    cursor = mouse->CreateCursor(surface, hot_x, hot_y);

    if (cursor) {

        cursor->next = mouse->cursors;

        mouse->cursors = cursor;

    }

    SDL_FreeSurface(surface);

    return cursor;

}

/* SDL_SetCursor(NULL) can be used to force the cursor redraw,

   if this is desired for any reason.  This is used when setting

   the video mode and when the SDL window gains the mouse focus.

 */

void

SDL_SetCursor(SDL_Cursor * cursor)

{

    /* Set the new cursor */

    if (cursor) {

        /* Make sure the cursor is still valid for this mouse */

        SDL_Cursor *found;

        for (found = mouse->cursors; found; found = found->next) {

            if (found == cursor) {

                break;

            }

        }

        if (!found) {

            SDL_SetError("Cursor not associated with the current mouse");

            return;

        }

        mouse->cur_cursor = cursor;

    } else {

        cursor = mouse->cur_cursor;

    }

    if (cursor && mouse->cursor_shown && !mouse->relative_mode) {

        if (mouse->ShowCursor) {

            mouse->ShowCursor(cursor);

        }

    } else {

        if (mouse->ShowCursor) {

            mouse->ShowCursor(NULL);

        }

    }

}

SDL_Cursor *

SDL_GetCursor(void)

{

    if (!mouse) {

        return NULL;

    }

    return mouse->cur_cursor;

}

void

SDL_FreeCursor(SDL_Cursor * cursor)

{

    SDL_Cursor *curr, *prev;

    if (!cursor) {

        return;

    }

    if (cursor == mouse->def_cursor) {

        return;

    }

    if (cursor == mouse->cur_cursor) {

        SDL_SetCursor(mouse->def_cursor);

    }

    for (prev = NULL, curr = mouse->cursors; curr;

         prev = curr, curr = curr->next) {

        if (curr == cursor) {

            if (prev) {

                prev->next = curr->next;

            } else {

                mouse->cursors = curr->next;

            }

            if (mouse->FreeCursor) {

                mouse->FreeCursor(curr);

            }

            return;

        }

    }

}

int

SDL_ShowCursor(int toggle)