kc3-lang/SDL/src/video/x11/SDL_x11events.c

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• Hash : dad42067
  Author :
  Date : 2013-08-12T11:13:50
  

  Fixes #2022, do not resume on Android when surfaceChanged If the app is in landscape mode and the user presses the power button, a pause is followed immediately by a surfaceChanged event because the lock screen is shown in portrait mode. This triggers a "false" resume. So, we just pause and resume following the onWindowFocusChanged events. Also, wait for SDL_APP_WILLENTERBACKGROUND and SDL_APP_DIDENTERBACKGROUND before blocking the event pump.

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• src/video/x11/SDL_x11events.c

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "SDL_config.h"
  
  #if SDL_VIDEO_DRIVER_X11
  
  #include <sys/types.h>
  #include <sys/time.h>
  #include <signal.h>
  #include <unistd.h>
  #include <limits.h> /* For INT_MAX */
  
  #include "SDL_x11video.h"
  #include "SDL_x11video.h"
  #include "SDL_x11touch.h"
  #include "SDL_x11xinput2.h"
  #include "../../events/SDL_events_c.h"
  #include "../../events/SDL_mouse_c.h"
  #include "../../events/SDL_touch_c.h"
  
  #include "SDL_timer.h"
  #include "SDL_syswm.h"
  
  #include <stdio.h>
  
  typedef struct {
      unsigned char *data;
      int format, count;
      Atom type;
  } SDL_x11Prop;
  
  /* Reads property
     Must call XFree on results
   */
  static void X11_ReadProperty(SDL_x11Prop *p, Display *disp, Window w, Atom prop)
  {
      unsigned char *ret=NULL;
      Atom type;
      int fmt;
      unsigned long count;
      unsigned long bytes_left;
      int bytes_fetch = 0;
  
      do {
          if (ret != 0) XFree(ret);
          XGetWindowProperty(disp, w, prop, 0, bytes_fetch, False, AnyPropertyType, &type, &fmt, &count, &bytes_left, &ret);
          bytes_fetch += bytes_left;
      } while (bytes_left != 0);
  
      p->data=ret;
      p->format=fmt;
      p->count=count;
      p->type=type;
  }
  
  /* Find text-uri-list in a list of targets and return it's atom
     if available, else return None */
  static Atom X11_PickTarget(Display *disp, Atom list[], int list_count)
  {
      Atom request = None;
      char *name;
      int i;
      for (i=0; i < list_count && request == None; i++) {
          name = XGetAtomName(disp, list[i]);
          if (strcmp("text/uri-list", name)==0) request = list[i];
          XFree(name);
      }
      return request;
  }
  
  /* Wrapper for X11_PickTarget for a maximum of three targets, a special
     case in the Xdnd protocol */
  static Atom X11_PickTargetFromAtoms(Display *disp, Atom a0, Atom a1, Atom a2)
  {
      int count=0;
      Atom atom[3];
      if (a0 != None) atom[count++] = a0;
      if (a1 != None) atom[count++] = a1;
      if (a2 != None) atom[count++] = a2;
      return X11_PickTarget(disp, atom, count);
  }
  /*#define DEBUG_XEVENTS*/
  
  struct KeyRepeatCheckData
  {
      XEvent *event;
      SDL_bool found;
  };
  
  static Bool X11_KeyRepeatCheckIfEvent(Display *display, XEvent *chkev,
      XPointer arg)
  {
      struct KeyRepeatCheckData *d = (struct KeyRepeatCheckData *) arg;
      if (chkev->type == KeyPress &&
          chkev->xkey.keycode == d->event->xkey.keycode &&
          chkev->xkey.time - d->event->xkey.time < 2)
          d->found = SDL_TRUE;
      return False;
  }
  
  /* 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 dummyev;
      struct KeyRepeatCheckData d;
      d.event = event;
      d.found = SDL_FALSE;
      if (XPending(display))
          XCheckIfEvent(display, &dummyev, X11_KeyRepeatCheckIfEvent,
              (XPointer) &d);
      return d.found;
  }
  
  static Bool X11_IsWheelCheckIfEvent(Display *display, XEvent *chkev,
      XPointer arg)
  {
      XEvent *event = (XEvent *) arg;
      if (chkev->type == ButtonRelease &&
          chkev->xbutton.button == event->xbutton.button &&
          chkev->xbutton.time == event->xbutton.time)
          return True;
      return False;
  }
  
  static SDL_bool X11_IsWheelEvent(Display * display,XEvent * event,int * ticks)
  {
      XEvent relevent;
      if (XPending(display)) {
          /* according to the xlib docs, no specific mouse wheel events exist.
             however, mouse wheel events trigger a button press and a button release
             immediately. thus, checking if the same button was released at the same
             time as it was pressed, should be an adequate hack to derive a mouse
             wheel event. */
          if (XCheckIfEvent(display, &relevent, X11_IsWheelCheckIfEvent,
              (XPointer) event)) {
  
              /* by default, X11 only knows 5 buttons. on most 3 button + wheel mouse,
                 Button4 maps to wheel up, Button5 maps to wheel down. */
              if (event->xbutton.button == Button4) {
                  *ticks = 1;
              }
              else if (event->xbutton.button == Button5) {
                  *ticks = -1;
              }
              return SDL_TRUE;
          }
      }
      return SDL_FALSE;
  }
  
  /* Convert URI to local filename
     return filename if possible, else NULL
  */
  static char* X11_URIToLocal(char* uri) {
      char *file = NULL;
  
      if (memcmp(uri,"file:/",6) == 0) uri += 6;      /* local file? */
      else if (strstr(uri,":/") != NULL) return file; /* wrong scheme */
  
      SDL_bool local = uri[0] != '/' || ( uri[0] != '\0' && uri[1] == '/' );
  
      /* got a hostname? */
      if ( !local && uri[0] == '/' && uri[2] != '/' ) {
        char* hostname_end = strchr( uri+1, '/' );
        if ( hostname_end != NULL ) {
            char hostname[ 257 ];
            if ( gethostname( hostname, 255 ) == 0 ) {
              hostname[ 256 ] = '\0';
              if ( memcmp( uri+1, hostname, hostname_end - ( uri+1 )) == 0 ) {
                  uri = hostname_end + 1;
                  local = SDL_TRUE;
              }
            }
        }
      }
      if ( local ) {
        file = uri;
        if ( uri[1] == '/' ) {
            file++;
        } else {
            file--;
        }
      }
      return file;
  }
  
  #if SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS
  static void X11_HandleGenericEvent(SDL_VideoData *videodata,XEvent event)
  {
      /* event is a union, so cookie == &event, but this is type safe. */
      XGenericEventCookie *cookie = &event.xcookie;
      if (XGetEventData(videodata->display, cookie)) {
          X11_HandleXinput2Event(videodata, cookie);
          XFreeEventData(videodata->display, cookie);
      }
  }
  #endif /* SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS */
  
  
  static void
  X11_DispatchFocusIn(SDL_WindowData *data)
  {
  #ifdef DEBUG_XEVENTS
      printf("window %p: Dispatching FocusIn\n", data);
  #endif
      SDL_SetKeyboardFocus(data->window);
  #ifdef X_HAVE_UTF8_STRING
      if (data->ic) {
          XSetICFocus(data->ic);
      }
  #endif
  }
  
  static void
  X11_DispatchFocusOut(SDL_WindowData *data)
  {
  #ifdef DEBUG_XEVENTS
      printf("window %p: Dispatching FocusOut\n", data);
  #endif
      SDL_SetKeyboardFocus(NULL);
  #ifdef X_HAVE_UTF8_STRING
      if (data->ic) {
          XUnsetICFocus(data->ic);
      }
  #endif
  }
  
  static void
  X11_DispatchMapNotify(SDL_WindowData *data)
  {
      SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_SHOWN, 0, 0);
      SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESTORED, 0, 0);
  }
  
  static void
  X11_DispatchUnmapNotify(SDL_WindowData *data)
  {
      SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_HIDDEN, 0, 0);
      SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MINIMIZED, 0, 0);
  }
  
  static void
  X11_DispatchEvent(_THIS)
  {
      SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
      Display *display = videodata->display;
      SDL_WindowData *data;
      XEvent xevent;
      int i;
  
      SDL_zero(xevent);           /* valgrind fix. --ryan. */
      XNextEvent(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_GetEventState(SDL_SYSWMEVENT) == SDL_ENABLE) {
          SDL_SysWMmsg wmmsg;
  
          SDL_VERSION(&wmmsg.version);
          wmmsg.subsystem = SDL_SYSWM_X11;
          wmmsg.msg.x11.event = xevent;
          SDL_SendSysWMEvent(&wmmsg);
      }
  
  #if SDL_VIDEO_DRIVER_X11_SUPPORTS_GENERIC_EVENTS
      if(xevent.type == GenericEvent) {
          X11_HandleGenericEvent(videodata,xevent);
          return;
      }
  #endif
  
  #if 0
      printf("type = %d display = %d window = %d\n",
             xevent.type, xevent.xany.display, xevent.xany.window);
  #endif
  
      data = NULL;
      if (videodata && videodata->windowlist) {
          for (i = 0; i < videodata->numwindows; ++i) {
              if ((videodata->windowlist[i] != NULL) &&
                  (videodata->windowlist[i]->xwindow == xevent.xany.window)) {
                  data = videodata->windowlist[i];
                  break;
              }
          }
      }
      if (!data) {
          return;
      }
  
      switch (xevent.type) {
  
          /* Gaining mouse coverage? */
      case EnterNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: EnterNotify! (%d,%d,%d)\n", data,
                     xevent.xcrossing.x,
                     xevent.xcrossing.y,
                     xevent.xcrossing.mode);
              if (xevent.xcrossing.mode == NotifyGrab)
                  printf("Mode: NotifyGrab\n");
              if (xevent.xcrossing.mode == NotifyUngrab)
                  printf("Mode: NotifyUngrab\n");
  #endif
              SDL_SetMouseFocus(data->window);
  
              if (!SDL_GetMouse()->relative_mode) {
                  SDL_SendMouseMotion(data->window, 0, 0, xevent.xcrossing.x, xevent.xcrossing.y);
              }
          }
          break;
          /* Losing mouse coverage? */
      case LeaveNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: LeaveNotify! (%d,%d,%d)\n", data,
                     xevent.xcrossing.x,
                     xevent.xcrossing.y,
                     xevent.xcrossing.mode);
              if (xevent.xcrossing.mode == NotifyGrab)
                  printf("Mode: NotifyGrab\n");
              if (xevent.xcrossing.mode == NotifyUngrab)
                  printf("Mode: NotifyUngrab\n");
  #endif
              if (!SDL_GetMouse()->relative_mode) {
                  SDL_SendMouseMotion(data->window, 0, 0, xevent.xcrossing.x, xevent.xcrossing.y);
              }
  
              if (xevent.xcrossing.mode != NotifyGrab &&
                  xevent.xcrossing.mode != NotifyUngrab &&
                  xevent.xcrossing.detail != NotifyInferior) {
                  SDL_SetMouseFocus(NULL);
              }
          }
          break;
  
          /* Gaining input focus? */
      case FocusIn:{
              if (xevent.xfocus.detail == NotifyInferior) {
  #ifdef DEBUG_XEVENTS
                  printf("window %p: FocusIn (NotifierInferior, ignoring)\n", data);
  #endif
                  break;
              }
  #ifdef DEBUG_XEVENTS
              printf("window %p: FocusIn!\n", data);
  #endif
              if (data->pending_focus == PENDING_FOCUS_OUT &&
                  data->window == SDL_GetKeyboardFocus()) {
                  /* We want to reset the keyboard here, because we may have
                     missed keyboard messages after our previous FocusOut.
                   */
                  /* Actually, if we do this we clear the ALT key on Unity
                     because it briefly takes focus for their dashboard.
  
                     I think it's better to think the ALT key is held down
                     when it's not, then always lose the ALT modifier on Unity.
                   */
                  /*SDL_ResetKeyboard();*/
              }
              data->pending_focus = PENDING_FOCUS_IN;
              data->pending_focus_time = SDL_GetTicks() + PENDING_FOCUS_IN_TIME;
          }
          break;
  
          /* Losing input focus? */
      case FocusOut:{
              if (xevent.xfocus.detail == NotifyInferior) {
                  /* We still have focus if a child gets focus */
  #ifdef DEBUG_XEVENTS
                  printf("window %p: FocusOut (NotifierInferior, ignoring)\n", data);
  #endif
                  break;
              }
  #ifdef DEBUG_XEVENTS
              printf("window %p: FocusOut!\n", data);
  #endif
              data->pending_focus = PENDING_FOCUS_OUT;
              data->pending_focus_time = SDL_GetTicks() + PENDING_FOCUS_OUT_TIME;
          }
          break;
  
          /* Generated upon EnterWindow and FocusIn */
      case KeymapNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: KeymapNotify!\n", data);
  #endif
              /* FIXME:
                 X11_SetKeyboardState(SDL_Display, xevent.xkeymap.key_vector);
               */
          }
          break;
  
          /* Has the keyboard layout changed? */
      case MappingNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: MappingNotify!\n", data);
  #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("window %p: KeyPress (X11 keycode = 0x%X)\n", data, xevent.xkey.keycode);
  #endif
              SDL_SendKeyboardKey(SDL_PRESSED, videodata->key_layout[keycode]);
  #if 1
              if (videodata->key_layout[keycode] == SDL_SCANCODE_UNKNOWN) {
                  int min_keycode, max_keycode;
                  XDisplayKeycodes(display, &min_keycode, &max_keycode);
  #if SDL_VIDEO_DRIVER_X11_HAS_XKBKEYCODETOKEYSYM
                  keysym = XkbKeycodeToKeysym(display, keycode, 0, 0);
  #else
                  keysym = XKeycodeToKeysym(display, keycode, 0);
  #endif
                  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%lX (%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(text);
              }
          }
          break;
  
          /* Key release? */
      case KeyRelease:{
              KeyCode keycode = xevent.xkey.keycode;
  
  #ifdef DEBUG_XEVENTS
              printf("window %p: KeyRelease (X11 keycode = 0x%X)\n", data, xevent.xkey.keycode);
  #endif
              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]);
          }
          break;
  
          /* Have we been iconified? */
      case UnmapNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: UnmapNotify!\n", data);
  #endif
              X11_DispatchUnmapNotify(data);
          }
          break;
  
          /* Have we been restored? */
      case MapNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: MapNotify!\n", data);
  #endif
              X11_DispatchMapNotify(data);
          }
          break;
  
          /* Have we been resized or moved? */
      case ConfigureNotify:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: ConfigureNotify! (position: %d,%d, size: %dx%d)\n", data,
                     xevent.xconfigure.x, xevent.xconfigure.y,
                     xevent.xconfigure.width, xevent.xconfigure.height);
  #endif
              if (xevent.xconfigure.x != data->last_xconfigure.x ||
                  xevent.xconfigure.y != data->last_xconfigure.y) {
                  SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_MOVED,
                                      xevent.xconfigure.x, xevent.xconfigure.y);
              }
              if (xevent.xconfigure.width != data->last_xconfigure.width ||
                  xevent.xconfigure.height != data->last_xconfigure.height) {
                  SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_RESIZED,
                                      xevent.xconfigure.width,
                                      xevent.xconfigure.height);
              }
              data->last_xconfigure = xevent.xconfigure;
          }
          break;
  
          /* Have we been requested to quit (or another client message?) */
      case ClientMessage:{
  
              int xdnd_version=0;
  
              if (xevent.xclient.message_type == videodata->XdndEnter) {
                  SDL_bool use_list = xevent.xclient.data.l[1] & 1;
                  data->xdnd_source = xevent.xclient.data.l[0];
                  xdnd_version = ( xevent.xclient.data.l[1] >> 24);
                  if (use_list) {
                      /* fetch conversion targets */
                      SDL_x11Prop p;
                      X11_ReadProperty(&p, display, data->xdnd_source, videodata->XdndTypeList);
                      /* pick one */
                      data->xdnd_req = X11_PickTarget(display, (Atom*)p.data, p.count);
                      XFree(p.data);
                  } else {
                      /* pick from list of three */
                      data->xdnd_req = X11_PickTargetFromAtoms(display, xevent.xclient.data.l[2], xevent.xclient.data.l[3], xevent.xclient.data.l[4]);
                  }
              }
              else if (xevent.xclient.message_type == videodata->XdndPosition) {
  
                  /* reply with status */
                  XClientMessageEvent m;
                  memset(&m, 0, sizeof(XClientMessageEvent));
                  m.type = ClientMessage;
                  m.display = xevent.xclient.display;
                  m.window = xevent.xclient.data.l[0];
                  m.message_type = videodata->XdndStatus;
                  m.format=32;
                  m.data.l[0] = data->xwindow;
                  m.data.l[1] = (data->xdnd_req != None);
                  m.data.l[2] = 0; /* specify an empty rectangle */
                  m.data.l[3] = 0;
                  m.data.l[4] = videodata->XdndActionCopy; /* we only accept copying anyway */
  
                  XSendEvent(display, xevent.xclient.data.l[0], False, NoEventMask, (XEvent*)&m);
                  XFlush(display);
              }
              else if(xevent.xclient.message_type == videodata->XdndDrop) {
                  if (data->xdnd_req == None) {
                      /* say again - not interested! */
                      XClientMessageEvent m;
                      memset(&m, 0, sizeof(XClientMessageEvent));
                      m.type = ClientMessage;
                      m.display = xevent.xclient.display;
                      m.window = xevent.xclient.data.l[0];
                      m.message_type = videodata->XdndFinished;
                      m.format=32;
                      m.data.l[0] = data->xwindow;
                      m.data.l[1] = 0;
                      m.data.l[2] = None; /* fail! */
                      XSendEvent(display, xevent.xclient.data.l[0], False, NoEventMask, (XEvent*)&m);
                  } else {
                      /* convert */
                      if(xdnd_version >= 1) {
                          XConvertSelection(display, videodata->XdndSelection, data->xdnd_req, videodata->PRIMARY, data->xwindow, xevent.xclient.data.l[2]);
                      } else {
                          XConvertSelection(display, videodata->XdndSelection, data->xdnd_req, videodata->PRIMARY, data->xwindow, CurrentTime);
                      }
                  }
              }
              else if ((xevent.xclient.message_type == videodata->WM_PROTOCOLS) &&
                  (xevent.xclient.format == 32) &&
                  (xevent.xclient.data.l[0] == videodata->_NET_WM_PING)) {
                  Window root = DefaultRootWindow(display);
  
  #ifdef DEBUG_XEVENTS
                  printf("window %p: _NET_WM_PING\n", data);
  #endif
                  xevent.xclient.window = root;
                  XSendEvent(display, root, False, SubstructureRedirectMask | SubstructureNotifyMask, &xevent);
                  break;
              }
  
              else if ((xevent.xclient.message_type == videodata->WM_PROTOCOLS) &&
                  (xevent.xclient.format == 32) &&
                  (xevent.xclient.data.l[0] == videodata->WM_DELETE_WINDOW)) {
  
  #ifdef DEBUG_XEVENTS
                  printf("window %p: WM_DELETE_WINDOW\n", data);
  #endif
                  SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_CLOSE, 0, 0);
                  break;
              }
          }
          break;
  
          /* Do we need to refresh ourselves? */
      case Expose:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: Expose (count = %d)\n", data, xevent.xexpose.count);
  #endif
              SDL_SendWindowEvent(data->window, SDL_WINDOWEVENT_EXPOSED, 0, 0);
          }
          break;
  
      case MotionNotify:{
              SDL_Mouse *mouse = SDL_GetMouse();
              if(!mouse->relative_mode) {
  #ifdef DEBUG_MOTION
                  printf("window %p: X11 motion: %d,%d\n", xevent.xmotion.x, xevent.xmotion.y);
  #endif
  
                  SDL_SendMouseMotion(data->window, 0, 0, xevent.xmotion.x, xevent.xmotion.y);
              }
          }
          break;
  
      case ButtonPress:{
              int ticks = 0;
              if (X11_IsWheelEvent(display,&xevent,&ticks)) {
                  SDL_SendMouseWheel(data->window, 0, 0, ticks);
              } else {
                  SDL_SendMouseButton(data->window, 0, SDL_PRESSED, xevent.xbutton.button);
              }
          }
          break;
  
      case ButtonRelease:{
              SDL_SendMouseButton(data->window, 0, SDL_RELEASED, xevent.xbutton.button);
          }
          break;
  
      case PropertyNotify:{
  #ifdef DEBUG_XEVENTS
              unsigned char *propdata;
              int status, real_format;
              Atom real_type;
              unsigned long items_read, items_left, i;
  
              char *name = XGetAtomName(display, xevent.xproperty.atom);
              if (name) {
                  printf("window %p: PropertyNotify: %s %s\n", data, name, (xevent.xproperty.state == PropertyDelete) ? "deleted" : "changed");
                  XFree(name);
              }
  
              status = XGetWindowProperty(display, data->xwindow, xevent.xproperty.atom, 0L, 8192L, False, AnyPropertyType, &real_type, &real_format, &items_read, &items_left, &propdata);
              if (status == Success && items_read > 0) {
                  if (real_type == XA_INTEGER) {
                      int *values = (int *)propdata;
  
                      printf("{");
                      for (i = 0; i < items_read; i++) {
                          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]);
                          }
                          printf(" }\n");
                      } else if (real_format == 16) {
                          Uint16 *values = (Uint16 *)propdata;
  
                          printf("{");
                          for (i = 0; i < items_read; i++) {
                              printf(" %d", values[i]);
                          }
                          printf(" }\n");
                      } else if (real_format == 8) {
                          Uint8 *values = (Uint8 *)propdata;
  
                          printf("{");
                          for (i = 0; i < items_read; i++) {
                              printf(" %d", values[i]);
                          }
                          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);
                          }
                      }
                      printf(" }\n");
                  } else {
                      char *name = XGetAtomName(display, real_type);
                      printf("Unknown type: %ld (%s)\n", real_type, name ? name : "UNKNOWN");
                      if (name) {
                          XFree(name);
                      }
                  }
              }
              if (status == Success) {
                  XFree(propdata);
              }
  #endif /* DEBUG_XEVENTS */
  
              if (xevent.xproperty.atom == data->videodata->_NET_WM_STATE) {
                  /* Get the new state from the window manager.
                     Compositing window managers can alter visibility of windows
                     without ever mapping / unmapping them, so we handle that here,
                     because they use the NETWM protocol to notify us of changes.
                   */
                  Uint32 flags = X11_GetNetWMState(_this, xevent.xproperty.window);
                  if ((flags^data->window->flags) & SDL_WINDOW_HIDDEN) {
                      if (flags & SDL_WINDOW_HIDDEN) {
                          X11_DispatchUnmapNotify(data);
                      } else {
                          X11_DispatchMapNotify(data);
                      }
                  }
              }
          }
          break;
  
      /* 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("window %p: SelectionRequest (requestor = %ld, target = %ld)\n", data,
                  req->requestor, req->target);
  #endif
  
              SDL_zero(sevent);
              sevent.xany.type = SelectionNotify;
              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) {
                  Atom XA_TARGETS = XInternAtom(display, "TARGETS", 0);
                  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;
                  } else if (XA_TARGETS == req->target) {
                      Atom SupportedFormats[] = { sevent.xselection.target, XA_TARGETS };
                      XChangeProperty(display, req->requestor, req->property,
                          XA_ATOM, 32, PropModeReplace,
                          (unsigned char*)SupportedFormats,
                          sizeof(SupportedFormats)/sizeof(*SupportedFormats));
                      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("window %p: SelectionNotify (requestor = %ld, target = %ld)\n", data,
                  xevent.xselection.requestor, xevent.xselection.target);
  #endif
              Atom target = xevent.xselection.target;
              if (target == data->xdnd_req) {
                  /* read data */
                  SDL_x11Prop p;
                  X11_ReadProperty(&p, display, data->xwindow, videodata->PRIMARY);
  
                  if (p.format == 8) {
                      SDL_bool expect_lf = SDL_FALSE;
                      char *start = NULL;
                      char *scan = (char*)p.data;
                      char *fn;
                      char *uri;
                      int length = 0;
                      while (p.count--) {
                          if (!expect_lf) {
                              if (*scan == 0x0D) {
                                  expect_lf = SDL_TRUE;
                              }
                              if (start == NULL) {
                                  start = scan;
                                  length = 0;
                              }
                              length++;
                          } else {
                              if (*scan == 0x0A && length > 0) {
                                  uri = SDL_malloc(length--);
                                  SDL_memcpy(uri, start, length);
                                  uri[length] = '\0';
                                  fn = X11_URIToLocal(uri);
                                  if (fn) {
                                      SDL_SendDropFile(fn);
                                  }
                                  SDL_free(uri);
                              }
                              expect_lf = SDL_FALSE;
                              start = NULL;
                          }
                          scan++;
                      }
                  }
  
                  XFree(p.data);
  
                  /* send reply */
                  XClientMessageEvent m;
                  SDL_memset(&m, 0, sizeof(XClientMessageEvent));
                  m.type = ClientMessage;
                  m.display = display;
                  m.window = data->xdnd_source;
                  m.message_type = videodata->XdndFinished;
                  m.format = 32;
                  m.data.l[0] = data->xwindow;
                  m.data.l[1] = 1;
                  m.data.l[2] = videodata->XdndActionCopy;
                  XSendEvent(display, data->xdnd_source, False, NoEventMask, (XEvent*)&m);
  
                  XSync(display, False);
  
              } else {
                  videodata->selection_waiting = SDL_FALSE;
              }
          }
          break;
  
      default:{
  #ifdef DEBUG_XEVENTS
              printf("window %p: Unhandled event %d\n", data, xevent.type);
  #endif
          }
          break;
      }
  }
  
  static void
  X11_HandleFocusChanges(_THIS)
  {
      SDL_VideoData *videodata = (SDL_VideoData *) _this->driverdata;
      int i;
  
      if (videodata && videodata->windowlist) {
          for (i = 0; i < videodata->numwindows; ++i) {
              SDL_WindowData *data = videodata->windowlist[i];
              if (data && data->pending_focus != PENDING_FOCUS_NONE) {
                  Uint32 now = SDL_GetTicks();
                  if ( (int)(data->pending_focus_time-now) <= 0 ) {
                      if ( data->pending_focus == PENDING_FOCUS_IN ) {
                          X11_DispatchFocusIn(data);
                      } else {
                          X11_DispatchFocusOut(data);
                      }
                      data->pending_focus = PENDING_FOCUS_NONE;
                  }
              }
          }
      }
  }
  /* Ack!  XPending() actually performs a blocking read if no events available */
  static 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);
  }
  
  
  /* !!! FIXME: this should be exposed in a header, or something. */
  int SDL_GetNumTouch(void);
  void SDL_dbus_screensaver_tickle(_THIS);
  
  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);
  
              #if SDL_USE_LIBDBUS
              SDL_dbus_screensaver_tickle(_this);
              #endif
  
              data->screensaver_activity = now;
          }
      }
  
      /* Keep processing pending events */
      while (X11_Pending(data->display)) {
          X11_DispatchEvent(_this);
      }
  
      /* FIXME: Only need to do this when there are pending focus changes */
      X11_HandleFocusChanges(_this);
  }
  
  
  void
  X11_SuspendScreenSaver(_THIS)
  {
  #if SDL_VIDEO_DRIVER_X11_XSCRNSAVER
      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
  
  #if SDL_USE_LIBDBUS
      if (_this->suspend_screensaver) {
          SDL_dbus_screensaver_tickle(_this);
      }
  #endif
  }
  
  #endif /* SDL_VIDEO_DRIVER_X11 */
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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