/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2009 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 <sys/types.h>

#include <sys/time.h>

#include <unistd.h>

#include "SDL_syswm.h"

#include "SDL_x11video.h"

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

#include "../../events/SDL_mouse_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);

    /* filter events catchs XIM events and sends them to the correct

       handler */

    if (XFilterEvent(&xevent, None) == True) {

#if 0

        printf("Filtered event type = %d display = %d window = %d\n",

               xevent.type, xevent.xany.display, xevent.xany.window);

#endif

        return;

    }

    /* 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;

    if (videodata && videodata->windowlist) {

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

            if ((videodata->windowlist[i] != NULL) &&

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

                data = videodata->windowlist[i];

                break;

            }

        }

    }

    if (!data) {

        return;

    }

#if 0

    printf("type = %d display = %d window = %d\n",

           xevent.type, xevent.xany.display, xevent.xany.window);

#endif

    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)) {

                /* FIXME: Should we reset data for all mice? */

#if 0

                SDL_SetMouseFocus(0, data->windowID);

                SDL_SendMouseMotion(0, 0, move->x, move->y, 0);

#endif

            }

        }

        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)) {

                /* FIXME: Should we reset data for all mice? */

#if 0

                SDL_SetMouseFocus(0, 0);

#endif

            }

        }

        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;

        /* Has the keyboard layout changed? */

    case MappingNotify:{

#ifdef DEBUG_XEVENTS

            printf("MappingNotify!\n");

#endif

            X11_UpdateKeymap(_this);

        }

        break;

        /* Key press? */

    case KeyPress:{

            KeyCode keycode = xevent.xkey.keycode;

            KeySym keysym = NoSymbol;

            char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];

            Status status = 0;

#ifdef DEBUG_XEVENTS

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

#endif

            SDL_SendKeyboardKey(videodata->keyboard, SDL_PRESSED,

                                videodata->key_layout[keycode]);

#if 0

            if (videodata->key_layout[keycode] == SDLK_UNKNOWN) {

                int min_keycode, max_keycode;

                XDisplayKeycodes(videodata->display, &min_keycode,

                                 &max_keycode);

                keysym = XKeycodeToKeysym(videodata->display, keycode, 0);

                fprintf(stderr,

                        "The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL mailing list <sdl@libsdl.org> X11 KeyCode %d (%d), X11 KeySym 0x%X (%s).\n",

                        keycode, keycode - min_keycode, keysym,

                        XKeysymToString(keysym));

            }

#endif

            /* */

            SDL_zero(text);

#ifdef X_HAVE_UTF8_STRING

            if (data->ic) {

                Xutf8LookupString(data->ic, &xevent.xkey, text, sizeof(text),

                                  &keysym, &status);

            }

#else

            XLookupString(&xevent.xkey, text, sizeof(text), &keysym, NULL);

#endif

            if (*text) {

                SDL_SendKeyboardText(videodata->keyboard, text);

            }

        }

        break;

        /* Key release? */

    case KeyRelease:{

            KeyCode keycode = xevent.xkey.keycode;

#ifdef DEBUG_XEVENTS

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

#endif

            SDL_SendKeyboardKey(videodata->keyboard, SDL_RELEASED,

                                videodata->key_layout[keycode]);

        }

        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:{

            for (i = 0; i < SDL_GetNumMice(); ++i) {

                SDL_Mouse *mouse;

#if SDL_VIDEO_DRIVER_X11_XINPUT

                X11_MouseData *data;

#endif

                mouse = SDL_GetMouse(i);

                if (!mouse->driverdata) {

                    switch (xevent.type) {

                    case MotionNotify:

#ifdef DEBUG_MOTION

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

                               xevent.xmotion.y);

#endif

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

                                            xevent.xmotion.y, 0);

                        break;

                    case ButtonPress:

                        SDL_SendMouseButton(mouse->id, SDL_PRESSED,

                                            xevent.xbutton.button);

                        break;

                    case ButtonRelease:

                        SDL_SendMouseButton(mouse->id, SDL_RELEASED,

                                            xevent.xbutton.button);

                        break;

                    }

                    continue;

                }

#if SDL_VIDEO_DRIVER_X11_XINPUT

                data = (X11_MouseData *) mouse->driverdata;

                if (xevent.type == data->motion) {

                    XDeviceMotionEvent *move =

                        (XDeviceMotionEvent *) & xevent;

#ifdef DEBUG_MOTION

                    printf("X11 motion: %d,%d\n", move->x, move->y);

#endif

                    SDL_SendMouseMotion(move->deviceid, 0, move->x, move->y,

                                        move->axis_data[2]);

                    return;

                }

                if (xevent.type == data->button_pressed) {

                    XDeviceButtonPressedEvent *pressed =

                        (XDeviceButtonPressedEvent *) & xevent;

                    SDL_SendMouseButton(pressed->deviceid, SDL_PRESSED,

                                        pressed->button);

                    return;

                }

                if (xevent.type == data->button_released) {

                    XDeviceButtonReleasedEvent *released =

                        (XDeviceButtonReleasedEvent *) & xevent;

                    SDL_SendMouseButton(released->deviceid, SDL_RELEASED,

                                        released->button);

                    return;

                }

                if (xevent.type == data->proximity_in) {

                    XProximityNotifyEvent *proximity =

                        (XProximityNotifyEvent *) & xevent;

                    SDL_SendProximity(proximity->deviceid, proximity->x,

                                      proximity->y, SDL_PROXIMITYIN);

                    return;

                }

                if (xevent.type == data->proximity_out) {

                    XProximityNotifyEvent *proximity =

                        (XProximityNotifyEvent *) & xevent;

                    SDL_SendProximity(proximity->deviceid, proximity->x,

                                      proximity->y, SDL_PROXIMITYOUT);

                    return;

                }

#endif

            }

#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;

    /* Update activity every 30 seconds to prevent screensaver */

    if (_this->suspend_screensaver) {

        Uint32 now = SDL_GetTicks();

        if (!data->screensaver_activity ||

            (int) (now - data->screensaver_activity) >= 30000) {

            XResetScreenSaver(data->display);

            data->screensaver_activity = now;

        }

    }

    /* Keep processing pending events */

    while (X11_Pending(data->display)) {

        X11_DispatchEvent(_this);

    }

}

/* This is so wrong it hurts */

#define GNOME_SCREENSAVER_HACK

#ifdef GNOME_SCREENSAVER_HACK

#include <unistd.h>

static pid_t screensaver_inhibit_pid;

static void

gnome_screensaver_disable()

{

    screensaver_inhibit_pid = fork();

    if (screensaver_inhibit_pid == 0) {

        close(0);

        close(1);

        close(2);

        execl("/usr/bin/gnome-screensaver-command",

              "gnome-screensaver-command",

              "--inhibit",

              "--reason",

              "GNOME screensaver doesn't respect MIT-SCREEN-SAVER", NULL);

        exit(2);

    }

}

static void

gnome_screensaver_enable()

{

    kill(screensaver_inhibit_pid, 15);

}

#endif

void

X11_SuspendScreenSaver(_THIS)

{

#if SDL_VIDEO_DRIVER_X11_SCRNSAVER

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

    int dummy;

    int major_version, minor_version;

    if (SDL_X11_HAVE_XSS) {

        /* XScreenSaverSuspend was introduced in MIT-SCREEN-SAVER 1.1 */

        if (!XScreenSaverQueryExtension(data->display, &dummy, &dummy) ||

            !XScreenSaverQueryVersion(data->display,

                                      &major_version, &minor_version) ||

            major_version < 1 || (major_version == 1 && minor_version < 1)) {

            return;

        }

        XScreenSaverSuspend(data->display, _this->suspend_screensaver);

        XResetScreenSaver(data->display);

    }

#endif

#ifdef GNOME_SCREENSAVER_HACK

    if (_this->suspend_screensaver) {

        gnome_screensaver_disable();

    } else {

        gnome_screensaver_enable();

    }

#endif

}

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