/* GTK - The GIMP Toolkit * gdkasync.c: Utility functions using the Xlib asynchronous interfaces * Copyright (C) 2003, Red Hat, Inc. * * 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 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. *//* Portions of code in this file are based on code from Xlib *//*Copyright 1986, 1998  The Open GroupPermission to use, copy, modify, distribute, and sell this software and itsdocumentation for any purpose is hereby granted without fee, provided thatthe above copyright notice appear in all copies and that both thatcopyright notice and this permission notice appear in supportingdocumentation.The above copyright notice and this permission notice shall be included inall copies or substantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ORIMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THEOPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER INAN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR INCONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.Except as contained in this notice, the name of The Open Group shall not beused in advertising or otherwise to promote the sale, use or other dealingsin this Software without prior written authorization from The Open Group.*/#include <config.h>#ifdef NEED_XIPROTO_H_FOR_XREPLY#include <X11/extensions/XIproto.h>#endif#include <X11/Xlibint.h>#include "gdkasync.h"#include "gdkx.h"#include "gdkalias.h"typedef struct _ChildInfoChildState ChildInfoChildState;typedef struct _ChildInfoState ChildInfoState;typedef struct _ListChildrenState ListChildrenState;typedef struct _SendEventState SendEventState;typedef struct _SetInputFocusState SetInputFocusState;typedef enum {  CHILD_INFO_GET_PROPERTY,  CHILD_INFO_GET_WA,  CHILD_INFO_GET_GEOMETRY} ChildInfoReq;struct _ChildInfoChildState{  gulong seq[3];};struct _ChildInfoState{  gboolean get_wm_state;  Window *children;  guint nchildren;  GdkChildInfoX11 *child_info;  ChildInfoChildState *child_states;  guint current_child;  guint n_children_found;  gint current_request;  gboolean have_error;  gboolean child_has_error;};struct _ListChildrenState{  Display *dpy;  gulong get_property_req;  gboolean have_error;  gboolean has_wm_state;};struct _SendEventState{  Display *dpy;  Window window;  _XAsyncHandler async;  gulong send_event_req;  gulong get_input_focus_req;  gboolean have_error;  GdkSendXEventCallback callback;  gpointer data;};struct _SetInputFocusState{  Display *dpy;  _XAsyncHandler async;  gulong set_input_focus_req;  gulong get_input_focus_req;};static Boolsend_event_handler (Display *dpy,		    xReply  *rep,		    char    *buf,		    int      len,		    XPointer data){  SendEventState *state = (SendEventState *)data;    if (dpy->last_request_read == state->send_event_req)    {      if (rep->generic.type == X_Error &&	  rep->error.errorCode == BadWindow)	{	  state->have_error = TRUE;	  return True;	}    }  else if (dpy->last_request_read == state->get_input_focus_req)    {      xGetInputFocusReply replbuf;      xGetInputFocusReply *repl;            if (rep->generic.type != X_Error)	{	  /* Actually does nothing, since there are no additional bytes	   * to read, but maintain good form.	   */	  repl = (xGetInputFocusReply *)	    _XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,			    (sizeof(xGetInputFocusReply) - sizeof(xReply)) >> 2,			    True);	}      if (state->callback)	state->callback (state->window, !state->have_error, state->data);      DeqAsyncHandler(state->dpy, &state->async);      g_free (state);      return (rep->generic.type != X_Error);    }  return False;}static voidclient_message_to_wire (XClientMessageEvent *ev,			xEvent              *event){  int i;  event->u.clientMessage.window = ev->window;  event->u.u.type = ev->type;  event->u.u.detail = ev->format;  switch (ev->format)    {    case 8:	      event->u.clientMessage.u.b.type   = ev->message_type;      for (i = 0; i < 20; i++)	event->u.clientMessage.u.b.bytes[i] = ev->data.b[i];      break;    case 16:      event->u.clientMessage.u.s.type   = ev->message_type;      event->u.clientMessage.u.s.shorts0   = ev->data.s[0];      event->u.clientMessage.u.s.shorts1   = ev->data.s[1];      event->u.clientMessage.u.s.shorts2   = ev->data.s[2];      event->u.clientMessage.u.s.shorts3   = ev->data.s[3];      event->u.clientMessage.u.s.shorts4   = ev->data.s[4];      event->u.clientMessage.u.s.shorts5   = ev->data.s[5];      event->u.clientMessage.u.s.shorts6   = ev->data.s[6];      event->u.clientMessage.u.s.shorts7   = ev->data.s[7];      event->u.clientMessage.u.s.shorts8   = ev->data.s[8];      event->u.clientMessage.u.s.shorts9   = ev->data.s[9];      break;    case 32:      event->u.clientMessage.u.l.type   = ev->message_type;      event->u.clientMessage.u.l.longs0   = ev->data.l[0];      event->u.clientMessage.u.l.longs1   = ev->data.l[1];      event->u.clientMessage.u.l.longs2   = ev->data.l[2];      event->u.clientMessage.u.l.longs3   = ev->data.l[3];      event->u.clientMessage.u.l.longs4   = ev->data.l[4];      break;    default:      /* client passing bogus data, let server complain */      break;    }}void_gdk_x11_send_client_message_async (GdkDisplay           *display, 				    Window                window, 				    gboolean              propagate,				    glong                 event_mask,				    XClientMessageEvent  *event_send,				    GdkSendXEventCallback callback,				    gpointer              data){  Display *dpy;  SendEventState *state;    dpy = GDK_DISPLAY_XDISPLAY (display);  state = g_new (SendEventState, 1);  state->dpy = dpy;  state->window = window;  state->callback = callback;  state->data = data;  state->have_error = FALSE;    LockDisplay(dpy);  state->async.next = dpy->async_handlers;  state->async.handler = send_event_handler;  state->async.data = (XPointer) state;  dpy->async_handlers = &state->async;  {    register xSendEventReq *req;    xEvent ev;        client_message_to_wire (event_send, &ev);          GetReq(SendEvent, req);    req->destination = window;    req->propagate = propagate;    req->eventMask = event_mask;    /* gross, matches Xproto.h */#ifdef WORD64			    memcpy ((char *) req->eventdata, (char *) &ev, SIZEOF(xEvent));#else        memcpy ((char *) &req->event, (char *) &ev, SIZEOF(xEvent));#endif        state->send_event_req = dpy->request;  }  /*   * XSync (dpy, 0)   */  {    xReq *req;        GetEmptyReq(GetInputFocus, req);    state->get_input_focus_req = dpy->request;  }    UnlockDisplay(dpy);  SyncHandle();}static Boolset_input_focus_handler (Display *dpy,			 xReply  *rep,			 char    *buf,			 int      len,			 XPointer data){  SetInputFocusState *state = (SetInputFocusState *)data;    if (dpy->last_request_read == state->set_input_focus_req)    {      if (rep->generic.type == X_Error &&	  rep->error.errorCode == BadMatch)	{	  /* Consume BadMatch errors, since we have no control	   * over them.	   */	  return True;	}    }    if (dpy->last_request_read == state->get_input_focus_req)    {      xGetInputFocusReply replbuf;      xGetInputFocusReply *repl;            if (rep->generic.type != X_Error)	{	  /* Actually does nothing, since there are no additional bytes	   * to read, but maintain good form.	   */	  repl = (xGetInputFocusReply *)	    _XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,			    (sizeof(xGetInputFocusReply) - sizeof(xReply)) >> 2,			    True);	}      DeqAsyncHandler(state->dpy, &state->async);      g_free (state);            return (rep->generic.type != X_Error);    }  return False;}void_gdk_x11_set_input_focus_safe (GdkDisplay             *display,			       Window                  window,			       int                     revert_to,			       Time                    time){  Display *dpy;  SetInputFocusState *state;    dpy = GDK_DISPLAY_XDISPLAY (display);  state = g_new (SetInputFocusState, 1);  state->dpy = dpy;    LockDisplay(dpy);  state->async.next = dpy->async_handlers;  state->async.handler = set_input_focus_handler;  state->async.data = (XPointer) state;  dpy->async_handlers = &state->async;  {    xSetInputFocusReq *req;        GetReq(SetInputFocus, req);    req->focus = window;    req->revertTo = revert_to;    req->time = time;    state->set_input_focus_req = dpy->request;  }  /*   * XSync (dpy, 0)   */  {    xReq *req;        GetEmptyReq(GetInputFocus, req);    state->get_input_focus_req = dpy->request;  }    UnlockDisplay(dpy);  SyncHandle();}static Boollist_children_handler (Display *dpy,		       xReply  *rep,		       char    *buf,		       int      len,		       XPointer data){