This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_x11events.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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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"
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#include <sys/types.h>
#include <sys/time.h>
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#include <signal.h>
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#include <unistd.h>
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#include <limits.h> /* For INT_MAX */
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#include "SDL_x11video.h"
#include "../../events/SDL_events_c.h"
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#include "../../events/SDL_mouse_c.h"
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#include "SDL_timer.h"
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#include "SDL_syswm.h"
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/*#define DEBUG_XEVENTS*/
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/* Check to see if this is a repeated key.
(idea shamelessly lifted from GII -- thanks guys! :)
*/
static SDL_bool X11_KeyRepeat(Display *display, XEvent *event)
{
XEvent peekevent;
if (XPending(display)) {
XPeekEvent(display, &peekevent);
if ((peekevent.type == KeyPress) &&
(peekevent.xkey.keycode == event->xkey.keycode) &&
((peekevent.xkey.time-event->xkey.time) < 2)) {
return SDL_TRUE;
}
}
return SDL_FALSE;
}
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static void
X11_DispatchEvent(_THIS)
{
SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
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Display *display = videodata->display;
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SDL_WindowData *data;
XEvent xevent;
int i;
SDL_zero(xevent); /* valgrind fix. --ryan. */
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XNextEvent(display, &xevent);
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/* filter events catchs XIM events and sends them to the correct
handler */
if (XFilterEvent(&xevent, None) == True) {
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printf("Filtered event type = %d display = %d window = %d\n",
xevent.type, xevent.xany.display, xevent.xany.window);
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#endif
return;
}
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/* Send a SDL_SYSWMEVENT if the application wants them */
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if (SDL_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
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SDL_SysWMmsg wmmsg;
SDL_VERSION(&wmmsg.version);
wmmsg.subsystem = SDL_SYSWM_X11;
wmmsg.event.xevent = xevent;
SDL_SendSysWMEvent(&wmmsg);
}
data = NULL;
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if (videodata && videodata->windowlist) {
for (i = 0; i < videodata->numwindows; ++i) {
if ((videodata->windowlist[i] != NULL) &&
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(videodata->windowlist[i]->xwindow == xevent.xany.window)) {
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data = videodata->windowlist[i];
break;
}
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}
}
if (!data) {
return;
}
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printf("type = %d display = %d window = %d\n",
xevent.type, xevent.xany.display, xevent.xany.window);
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switch (xevent.type) {
/* Gaining mouse coverage? */
case EnterNotify:{
#ifdef DEBUG_XEVENTS
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printf("EnterNotify! (%d,%d,%d)\n",
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xevent.xcrossing.x,
xevent.xcrossing.y,
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xevent.xcrossing.mode);
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if (xevent.xcrossing.mode == NotifyGrab)
printf("Mode: NotifyGrab\n");
if (xevent.xcrossing.mode == NotifyUngrab)
printf("Mode: NotifyUngrab\n");
#endif
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SDL_SetMouseFocus(data->window);
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}
break;
/* Losing mouse coverage? */
case LeaveNotify:{
#ifdef DEBUG_XEVENTS
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printf("LeaveNotify! (%d,%d,%d)\n",
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xevent.xcrossing.x,
xevent.xcrossing.y,
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xevent.xcrossing.mode);
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if (xevent.xcrossing.mode == NotifyGrab)
printf("Mode: NotifyGrab\n");
if (xevent.xcrossing.mode == NotifyUngrab)
printf("Mode: NotifyUngrab\n");
#endif
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if (xevent.xcrossing.mode != NotifyGrab &&
xevent.xcrossing.mode != NotifyUngrab &&
xevent.xcrossing.detail != NotifyInferior) {
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SDL_SetMouseFocus(NULL);
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}
}
break;
/* Gaining input focus? */
case FocusIn:{
#ifdef DEBUG_XEVENTS
printf("FocusIn!\n");
#endif
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SDL_SetKeyboardFocus(data->window);
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#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
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SDL_SetKeyboardFocus(NULL);
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#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;
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/* Has the keyboard layout changed? */
case MappingNotify:{
#ifdef DEBUG_XEVENTS
printf("MappingNotify!\n");
#endif
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X11_UpdateKeymap(_this);
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}
break;
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/* Key press? */
case KeyPress:{
KeyCode keycode = xevent.xkey.keycode;
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KeySym keysym = NoSymbol;
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SDL_scancode scancode;
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char text[SDL_TEXTINPUTEVENT_TEXT_SIZE];
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Status status = 0;
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#ifdef DEBUG_XEVENTS
printf("KeyPress (X11 keycode = 0x%X)\n", xevent.xkey.keycode);
#endif
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SDL_SendKeyboardKey(SDL_PRESSED, videodata->key_layout[keycode]);
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if (videodata->key_layout[keycode] == SDLK_UNKNOWN) {
int min_keycode, max_keycode;
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XDisplayKeycodes(display, &min_keycode, &max_keycode);
keysym = XKeycodeToKeysym(display, keycode, 0);
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fprintf(stderr,
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"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%lX (%s).\n",
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keycode, keycode - min_keycode, keysym,
XKeysymToString(keysym));
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SDL_zero(text);
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#ifdef X_HAVE_UTF8_STRING
if (data->ic) {
Xutf8LookupString(data->ic, &xevent.xkey, text, sizeof(text),
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&keysym, &status);
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XLookupString(&xevent.xkey, text, sizeof(text), &keysym, NULL);
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if (*text) {
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SDL_SendKeyboardText(text);
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}
break;
/* Key release? */
case KeyRelease:{
KeyCode keycode = xevent.xkey.keycode;
#ifdef DEBUG_XEVENTS
printf("KeyRelease (X11 keycode = 0x%X)\n", xevent.xkey.keycode);
#endif
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if (X11_KeyRepeat(display, &xevent)) {
/* We're about to get a repeated key down, ignore the key up */
break;
}
SDL_SendKeyboardKey(SDL_RELEASED, videodata->key_layout[keycode]);
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}
break;
/* Have we been iconified? */
case UnmapNotify:{
#ifdef DEBUG_XEVENTS
printf("UnmapNotify!\n");
#endif
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);
SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
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}
break;
/* Have we been restored? */
case MapNotify:{
#ifdef DEBUG_XEVENTS
printf("MapNotify!\n");
#endif
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESTORED, 0, 0);
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}
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
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MOVED,
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xevent.xconfigure.x, xevent.xconfigure.y);
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESIZED,
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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)) {
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
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}
}
break;
/* Do we need to refresh ourselves? */
case Expose:{
#ifdef DEBUG_XEVENTS
printf("Expose (count = %d)\n", xevent.xexpose.count);
#endif
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SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_EXPOSED, 0, 0);
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}
break;
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case MotionNotify:{
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#ifdef DEBUG_MOTION
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printf("X11 motion: %d,%d\n", xevent.xmotion.x, xevent.xmotion.y);
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SDL_SendMouseMotion(data->window, 0, xevent.xmotion.x, xevent.xmotion.y);
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}
break;
case ButtonPress:{
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SDL_SendMouseButton(data->window, SDL_PRESSED, xevent.xbutton.button);
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}
break;
case ButtonRelease:{
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SDL_SendMouseButton(data->window, SDL_RELEASED, xevent.xbutton.button);
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}
break;
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case PropertyNotify:{
#ifdef DEBUG_XEVENTS
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unsigned char *propdata;
int status, real_format;
Atom real_type;
unsigned long items_read, items_left, i;
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char *name = XGetAtomName(display, xevent.xproperty.atom);
if (name) {
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printf("PropertyNotify: %s %s\n", name, (xevent.xproperty.state == PropertyDelete) ? "deleted" : "changed");
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XFree(name);
}
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status = XGetWindowProperty(display, data->xwindow, xevent.xproperty.atom, 0L, 8192L, False, AnyPropertyType, &real_type, &real_format, &items_read, &items_left, &propdata);
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if (status == Success && items_read > 0) {
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if (real_type == XA_INTEGER) {
int *values = (int *)propdata;
printf("{");
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for (i = 0; i < items_read; i++) {
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printf(" %d", values[i]);
}
printf(" }\n");
} else if (real_type == XA_CARDINAL) {
if (real_format == 32) {
Uint32 *values = (Uint32 *)propdata;
printf("{");
for (i = 0; i < items_read; i++) {
printf(" %d", values[i]);
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printf(" }\n");
} else if (real_format == 16) {
Uint16 *values = (Uint16 *)propdata;
printf("{");
for (i = 0; i < items_read; i++) {
printf(" %d", values[i]);
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printf(" }\n");
} else if (real_format == 8) {
Uint8 *values = (Uint8 *)propdata;
printf("{");
for (i = 0; i < items_read; i++) {
printf(" %d", values[i]);
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printf(" }\n");
}
} else if (real_type == XA_STRING ||
real_type == videodata->UTF8_STRING) {
printf("{ \"%s\" }\n", propdata);
} else if (real_type == XA_ATOM) {
Atom *atoms = (Atom *)propdata;
printf("{");
for (i = 0; i < items_read; i++) {
char *name = XGetAtomName(display, atoms[i]);
if (name) {
printf(" %s", name);
XFree(name);
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printf(" }\n");
} else {
char *name = XGetAtomName(display, real_type);
printf("Unknown type: %ld (%s)\n", real_type, name ? name : "UNKNOWN");
if (name) {
XFree(name);
}
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}
break;
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/* Copy the selection from XA_CUT_BUFFER0 to the requested property */
case SelectionRequest: {
XSelectionRequestEvent *req;
XEvent sevent;
int seln_format;
unsigned long nbytes;
unsigned long overflow;
unsigned char *seln_data;
req = &xevent.xselectionrequest;
#ifdef DEBUG_XEVENTS
printf("SelectionRequest (requestor = %ld, target = %ld)\n",
req->requestor, req->target);
#endif
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SDL_zero(sevent);
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sevent.xany.type = SelectionNotify;
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sevent.xselection.selection = req->selection;
sevent.xselection.target = None;
sevent.xselection.property = None;
sevent.xselection.requestor = req->requestor;
sevent.xselection.time = req->time;
if (XGetWindowProperty(display, DefaultRootWindow(display),
XA_CUT_BUFFER0, 0, INT_MAX/4, False, req->target,
&sevent.xselection.target, &seln_format, &nbytes,
&overflow, &seln_data) == Success) {
if (sevent.xselection.target == req->target) {
XChangeProperty(display, req->requestor, req->property,
sevent.xselection.target, seln_format, PropModeReplace,
seln_data, nbytes);
sevent.xselection.property = req->property;
}
XFree(seln_data);
}
XSendEvent(display, req->requestor, False, 0, &sevent);
XSync(display, False);
}
break;
case SelectionNotify: {
#ifdef DEBUG_XEVENTS
printf("SelectionNotify (requestor = %ld, target = %ld)\n",
xevent.xselection.requestor, xevent.xselection.target);
#endif
videodata->selection_waiting = SDL_FALSE;
}
break;
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#ifdef DEBUG_XEVENTS
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printf("Unhandled event %d\n", xevent.type);
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#endif
}
break;
}
}
/* Ack! XPending() actually performs a blocking read if no events available */
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static int
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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;
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/* Update activity every 30 seconds to prevent screensaver */
if (_this->suspend_screensaver) {
Uint32 now = SDL_GetTicks();
if (!data->screensaver_activity ||
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(int) (now - data->screensaver_activity) >= 30000) {
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XResetScreenSaver(data->display);
data->screensaver_activity = now;
}
}
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/* Keep processing pending events */
while (X11_Pending(data->display)) {
X11_DispatchEvent(_this);
}
}
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/* This is so wrong it hurts */
#define GNOME_SCREENSAVER_HACK
#ifdef GNOME_SCREENSAVER_HACK
#include <unistd.h>
static pid_t screensaver_inhibit_pid;
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static void
gnome_screensaver_disable()
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{
screensaver_inhibit_pid = fork();
if (screensaver_inhibit_pid == 0) {
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close(0);
close(1);
close(2);
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execl("/usr/bin/gnome-screensaver-command",
"gnome-screensaver-command",
"--inhibit",
"--reason",
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"GNOME screensaver doesn't respect MIT-SCREEN-SAVER", NULL);
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exit(2);
}
}
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static void
gnome_screensaver_enable()
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{
kill(screensaver_inhibit_pid, 15);
}
#endif
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X11_SuspendScreenSaver(_THIS)
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#if SDL_VIDEO_DRIVER_X11_SCRNSAVER
SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
int dummy;
int major_version, minor_version;
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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;
}
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XScreenSaverSuspend(data->display, _this->suspend_screensaver);
XResetScreenSaver(data->display);
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#endif
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#ifdef GNOME_SCREENSAVER_HACK
if (_this->suspend_screensaver) {
gnome_screensaver_disable();
} else {
gnome_screensaver_enable();
}
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}
/* vi: set ts=4 sw=4 expandtab: */