/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 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_x11video.h"

#include "../../events/SDL_events_c.h"

static void

X11_DispatchEvent(_THIS)

{

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

    SDL_WindowData *data;

    XEvent xevent;

    int i;

    SDL_zero(xevent);           /* valgrind fix. --ryan. */

    XNextEvent(videodata->display, &xevent);

    /* Send a SDL_SYSWMEVENT if the application wants them */

    if (SDL_ProcessEvents[SDL_SYSWMEVENT] == SDL_ENABLE) {

        SDL_SysWMmsg wmmsg;

        SDL_VERSION(&wmmsg.version);

        wmmsg.subsystem = SDL_SYSWM_X11;

        wmmsg.event.xevent = xevent;

        SDL_SendSysWMEvent(&wmmsg);

    }

    data = NULL;

    for (i = 0; i < videodata->numwindows; ++i) {

        if (videodata->windowlist[i]->window == xevent.xany.window) {

            data = videodata->windowlist[i];

        }

    }

    if (!data) {

        return;

    }

    switch (xevent.type) {

        /* Gaining mouse coverage? */

    case EnterNotify:{

#ifdef DEBUG_XEVENTS

            printf("EnterNotify! (%d,%d)\n", xevent.xcrossing.x,

                   xevent.xcrossing.y);

            if (xevent.xcrossing.mode == NotifyGrab)

                printf("Mode: NotifyGrab\n");

            if (xevent.xcrossing.mode == NotifyUngrab)

                printf("Mode: NotifyUngrab\n");

#endif

            if ((xevent.xcrossing.mode != NotifyGrab) &&

                (xevent.xcrossing.mode != NotifyUngrab)) {

                SDL_SetMouseFocus(videodata->mouse, data->windowID);

                SDL_SendMouseMotion(videodata->mouse, 0, xevent.xcrossing.x,

                                    xevent.xcrossing.y);

            }

        }

        break;

        /* Losing mouse coverage? */

    case LeaveNotify:{

#ifdef DEBUG_XEVENTS

            printf("LeaveNotify! (%d,%d)\n", xevent.xcrossing.x,

                   xevent.xcrossing.y);

            if (xevent.xcrossing.mode == NotifyGrab)

                printf("Mode: NotifyGrab\n");

            if (xevent.xcrossing.mode == NotifyUngrab)

                printf("Mode: NotifyUngrab\n");

#endif

            if ((xevent.xcrossing.mode != NotifyGrab) &&

                (xevent.xcrossing.mode != NotifyUngrab) &&

                (xevent.xcrossing.detail != NotifyInferior)) {

                SDL_SendMouseMotion(videodata->mouse, 0,

                                    xevent.xcrossing.x, xevent.xcrossing.y);

                SDL_SetMouseFocus(videodata->mouse, 0);

            }

        }

        break;

        /* Gaining input focus? */

    case FocusIn:{

#ifdef DEBUG_XEVENTS

            printf("FocusIn!\n");

#endif

            SDL_SetKeyboardFocus(videodata->keyboard, data->windowID);

#ifdef X_HAVE_UTF8_STRING

            if (data->ic) {

                XSetICFocus(data->ic);

            }

#endif

        }

        break;

        /* Losing input focus? */

    case FocusOut:{

#ifdef DEBUG_XEVENTS

            printf("FocusOut!\n");

#endif

            SDL_SetKeyboardFocus(videodata->keyboard, 0);

#ifdef X_HAVE_UTF8_STRING

            if (data->ic) {

                XUnsetICFocus(data->ic);

            }

#endif

        }

        break;

        /* Generated upon EnterWindow and FocusIn */

    case KeymapNotify:{

#ifdef DEBUG_XEVENTS

            printf("KeymapNotify!\n");

#endif

            /* FIXME:

               X11_SetKeyboardState(SDL_Display, xevent.xkeymap.key_vector);

             */

        }

        break;

        /* Mouse motion? */

    case MotionNotify:{

#ifdef DEBUG_MOTION

            printf("X11 motion: %d,%d\n", xevent.xmotion.x, xevent.xmotion.y);

#endif

            SDL_SendMouseMotion(videodata->mouse, 0, xevent.xmotion.x,

                                xevent.xmotion.y);

        }

        break;

        /* Mouse button press? */

    case ButtonPress:{

            SDL_SendMouseButton(videodata->mouse, SDL_PRESSED,

                                xevent.xbutton.button);

        }

        break;

        /* Mouse button release? */

    case ButtonRelease:{

            SDL_SendMouseButton(videodata->mouse, SDL_RELEASED,

                                xevent.xbutton.button);

        }

        break;

        /* Key press? */

    case KeyPress:{

#if 0                           /* FIXME */

            static SDL_keysym saved_keysym;

            SDL_keysym keysym;

            KeyCode keycode = xevent.xkey.keycode;

#ifdef DEBUG_XEVENTS

            printf("KeyPress (X11 keycode = 0x%X)\n", xevent.xkey.keycode);

#endif

            /* Get the translated SDL virtual keysym */

            if (keycode) {

                keysym.scancode = keycode;

                keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

                keysym.mod = KMOD_NONE;

                keysym.unicode = 0;

            } else {

                keysym = saved_keysym;

            }

            /* If we're not doing translation, we're done! */

            if (!SDL_TranslateUNICODE) {

                posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

                break;

            }

            if (XFilterEvent(&xevent, None)) {

                if (xevent.xkey.keycode) {

                    posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

                } else {

                    /* Save event to be associated with IM text

                       In 1.3 we'll have a text event instead.. */

                    saved_keysym = keysym;

                }

                break;

            }

            /* Look up the translated value for the key event */

#ifdef X_HAVE_UTF8_STRING

            if (data->ic != NULL) {

                static Status state;

                /* A UTF-8 character can be at most 6 bytes */

                char keybuf[6];

                if (Xutf8LookupString(data->ic, &xevent.xkey,

                                      keybuf, sizeof(keybuf), NULL, &state)) {

                    keysym.unicode = Utf8ToUcs4((Uint8 *) keybuf);

                }

            } else

#endif

            {

                static XComposeStatus state;

                char keybuf[32];

                if (XLookupString(&xevent.xkey,

                                  keybuf, sizeof(keybuf), NULL, &state)) {

                    /*

                     * FIXME: XLookupString() may yield more than one

                     * character, so we need a mechanism to allow for

                     * this (perhaps null keypress events with a

                     * unicode value)

                     */

                    keysym.unicode = (Uint8) keybuf[0];

                }

            }

            posted = SDL_PrivateKeyboard(SDL_PRESSED, &keysym);

#endif // 0

        }

        break;

        /* Key release? */

    case KeyRelease:{

#if 0                           /* FIXME */

            SDL_keysym keysym;

            KeyCode keycode = xevent.xkey.keycode;

#ifdef DEBUG_XEVENTS

            printf("KeyRelease (X11 keycode = 0x%X)\n", xevent.xkey.keycode);

#endif

            /* Check to see if this is a repeated key */

            if (X11_KeyRepeat(SDL_Display, &xevent)) {

                break;

            }

            /* Get the translated SDL virtual keysym */

            keysym.scancode = keycode;

            keysym.sym = X11_TranslateKeycode(SDL_Display, keycode);

            keysym.mod = KMOD_NONE;

            keysym.unicode = 0;

            posted = SDL_PrivateKeyboard(SDL_RELEASED, &keysym);

#endif // 0

        }

        break;

        /* Have we been iconified? */

    case UnmapNotify:{

#ifdef DEBUG_XEVENTS

            printf("UnmapNotify!\n");

#endif

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_HIDDEN, 0, 0);

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_MINIMIZED, 0,

                                0);

        }

        break;

        /* Have we been restored? */

    case MapNotify:{

#ifdef DEBUG_XEVENTS

            printf("MapNotify!\n");

#endif

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_SHOWN, 0, 0);

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_RESTORED, 0,

                                0);

        }

        break;

        /* Have we been resized or moved? */

    case ConfigureNotify:{

#ifdef DEBUG_XEVENTS

            printf("ConfigureNotify! (resize: %dx%d)\n",

                   xevent.xconfigure.width, xevent.xconfigure.height);

#endif

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_MOVED,

                                xevent.xconfigure.x, xevent.xconfigure.y);

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_RESIZED,

                                xevent.xconfigure.width,

                                xevent.xconfigure.height);

        }

        break;

        /* Have we been requested to quit (or another client message?) */

    case ClientMessage:{

            if ((xevent.xclient.format == 32) &&

                (xevent.xclient.data.l[0] == videodata->WM_DELETE_WINDOW)) {

                SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_CLOSE, 0,

                                    0);

            }

        }

        break;

        /* Do we need to refresh ourselves? */

    case Expose:{

#ifdef DEBUG_XEVENTS

            printf("Expose (count = %d)\n", xevent.xexpose.count);

#endif

            SDL_SendWindowEvent(data->windowID, SDL_WINDOWEVENT_EXPOSED, 0,

                                0);

        }

        break;

    default:{

#ifdef DEBUG_XEVENTS

            printf("Unhandled event %d\n", xevent.type);

#endif

        }

        break;

    }

}

/* Ack!  XPending() actually performs a blocking read if no events available */

int

X11_Pending(Display * display)

{

    /* Flush the display connection and look to see if events are queued */

    XFlush(display);

    if (XEventsQueued(display, QueuedAlready)) {

        return (1);

    }

    /* More drastic measures are required -- see if X is ready to talk */

    {

        static struct timeval zero_time;        /* static == 0 */

        int x11_fd;

        fd_set fdset;

        x11_fd = ConnectionNumber(display);

        FD_ZERO(&fdset);

        FD_SET(x11_fd, &fdset);

        if (select(x11_fd + 1, &fdset, NULL, NULL, &zero_time) == 1) {

            return (XPending(display));

        }

    }

    /* Oh well, nothing is ready .. */

    return (0);

}

void

X11_PumpEvents(_THIS)

{

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

    /* Keep processing pending events */

    while (X11_Pending(data->display)) {

        X11_DispatchEvent(_this);

    }

}

void

X11_SaveScreenSaver(Display * display, int *saved_timeout, BOOL * dpms)

{

    int timeout, interval, prefer_blank, allow_exp;

    XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);

    *saved_timeout = timeout;

#if SDL_VIDEO_DRIVER_X11_DPMS

    if (SDL_X11_HAVE_DPMS) {

        int dummy;

        if (DPMSQueryExtension(display, &dummy, &dummy)) {

            CARD16 state;

            DPMSInfo(display, &state, dpms);

        }

    }

#else

    *dpms = 0;

#endif /* SDL_VIDEO_DRIVER_X11_DPMS */

}

void

X11_DisableScreenSaver(Display * display)

{

    int timeout, interval, prefer_blank, allow_exp;

    XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);

    timeout = 0;

    XSetScreenSaver(display, timeout, interval, prefer_blank, allow_exp);

#if SDL_VIDEO_DRIVER_X11_DPMS

    if (SDL_X11_HAVE_DPMS) {

        int dummy;

        if (DPMSQueryExtension(display, &dummy, &dummy)) {

            DPMSDisable(display);

        }

    }

#endif /* SDL_VIDEO_DRIVER_X11_DPMS */

}

void

X11_RestoreScreenSaver(Display * display, int saved_timeout, BOOL dpms)

{

    int timeout, interval, prefer_blank, allow_exp;

    XGetScreenSaver(display, &timeout, &interval, &prefer_blank, &allow_exp);

    timeout = saved_timeout;

    XSetScreenSaver(display, timeout, interval, prefer_blank, allow_exp);

#if SDL_VIDEO_DRIVER_X11_DPMS

    if (SDL_X11_HAVE_DPMS) {

        int dummy;

        if (DPMSQueryExtension(display, &dummy, &dummy)) {

            if (dpms) {

                DPMSEnable(display);

            }

        }

    }

#endif /* SDL_VIDEO_DRIVER_X11_DPMS */

}

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