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xboard.c

/*
 * xboard.c -- X front end for XBoard
 * $Id: xboard.c,v 1.118 2002/02/02 06:11:58 mann Exp $
 *
 * Copyright 1991 by Digital Equipment Corporation, Maynard, Massachusetts.
 * Enhancements Copyright 1992-2001 Free Software Foundation, Inc.
 *
 * The following terms apply to Digital Equipment Corporation's copyright
 * interest in XBoard:
 * ------------------------------------------------------------------------
 * All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of Digital not be
 * used in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 *
 * DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
 * DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
 * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 * ------------------------------------------------------------------------
 *
 * The following terms apply to the enhanced version of XBoard distributed
 * by the Free Software Foundation:
 * ------------------------------------------------------------------------
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * ------------------------------------------------------------------------
 *
 * See the file ChangeLog for a revision history.
 */

#include "config.h"

#include <stdio.h>
#include <ctype.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>

#if !OMIT_SOCKETS
# if HAVE_SYS_SOCKET_H
#  include <sys/socket.h>
#  include <netinet/in.h>
#  include <netdb.h>
# else /* not HAVE_SYS_SOCKET_H */
#  if HAVE_LAN_SOCKET_H
#   include <lan/socket.h>
#   include <lan/in.h>
#   include <lan/netdb.h>
#  else /* not HAVE_LAN_SOCKET_H */
#   define OMIT_SOCKETS 1
#  endif /* not HAVE_LAN_SOCKET_H */
# endif /* not HAVE_SYS_SOCKET_H */
#endif /* !OMIT_SOCKETS */

#if STDC_HEADERS
# include <stdlib.h>
# include <string.h>
#else /* not STDC_HEADERS */
extern char *getenv();
# if HAVE_STRING_H
#  include <string.h>
# else /* not HAVE_STRING_H */
#  include <strings.h>
# endif /* not HAVE_STRING_H */
#endif /* not STDC_HEADERS */

#if HAVE_SYS_FCNTL_H
# include <sys/fcntl.h>
#else /* not HAVE_SYS_FCNTL_H */
# if HAVE_FCNTL_H
#  include <fcntl.h>
# endif /* HAVE_FCNTL_H */
#endif /* not HAVE_SYS_FCNTL_H */

#if HAVE_SYS_SYSTEMINFO_H
# include <sys/systeminfo.h>
#endif /* HAVE_SYS_SYSTEMINFO_H */

#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#if HAVE_UNISTD_H
# include <unistd.h>
#endif

#if HAVE_SYS_WAIT_H
# include <sys/wait.h>
#endif

#if HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
# define HAVE_DIR_STRUCT
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# if HAVE_SYS_NDIR_H
#  include <sys/ndir.h>
#  define HAVE_DIR_STRUCT
# endif
# if HAVE_SYS_DIR_H
#  include <sys/dir.h>
#  define HAVE_DIR_STRUCT
# endif
# if HAVE_NDIR_H
#  include <ndir.h>
#  define HAVE_DIR_STRUCT
# endif
#endif

#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
#include <X11/Shell.h>
#include <X11/cursorfont.h>
#include <X11/Xatom.h>
#if USE_XAW3D
#include <X11/Xaw3d/Dialog.h>
#include <X11/Xaw3d/Form.h>
#include <X11/Xaw3d/List.h>
#include <X11/Xaw3d/Label.h>
#include <X11/Xaw3d/SimpleMenu.h>
#include <X11/Xaw3d/SmeBSB.h>
#include <X11/Xaw3d/SmeLine.h>
#include <X11/Xaw3d/Box.h>
#include <X11/Xaw3d/MenuButton.h>
#include <X11/Xaw3d/Text.h>
#include <X11/Xaw3d/AsciiText.h>
#else
#include <X11/Xaw/Dialog.h>
#include <X11/Xaw/Form.h>
#include <X11/Xaw/List.h>
#include <X11/Xaw/Label.h>
#include <X11/Xaw/SimpleMenu.h>
#include <X11/Xaw/SmeBSB.h>
#include <X11/Xaw/SmeLine.h>
#include <X11/Xaw/Box.h>
#include <X11/Xaw/MenuButton.h>
#include <X11/Xaw/Text.h>
#include <X11/Xaw/AsciiText.h>
#endif

#if HAVE_LIBXPM
#include <X11/xpm.h>
#include "pixmaps/pixmaps.h"
#define IMAGE_EXT "xpm"
#else
#define IMAGE_EXT "xim"
#include "bitmaps/bitmaps.h"
#endif

#include "bitmaps/icon_white.bm"
#include "bitmaps/icon_black.bm"
#include "bitmaps/checkmark.bm"

#include "common.h"
#include "frontend.h"
#include "backend.h"
#include "moves.h"
#include "xboard.h"
#include "childio.h"
#include "xgamelist.h"
#include "xhistory.h"
#include "xedittags.h"

#if !DEFINED_SYS_ERRLIST
extern char *sys_errlist[];
#endif

#ifdef __CYGWIN__
#define sys_errlist _sys_errlist
#endif

#ifdef __EMX__
#ifndef HAVE_USLEEP
#define HAVE_USLEEP
#endif
#define usleep(t)   _sleep2(((t)+500)/1000)
#endif

typedef struct {
    String string;
    XtActionProc proc;
} MenuItem;

typedef struct {
    String name;
    MenuItem *mi;
} Menu;

int main P((int argc, char **argv));
RETSIGTYPE CmailSigHandler P((int sig));
RETSIGTYPE IntSigHandler P((int sig));
void CreateGCs P((void));
void CreateXIMPieces P((void));
void CreateXPMPieces P((void));
void CreatePieces P((void));
void CreatePieceMenus P((void));
Widget CreateMenuBar P((Menu *mb));
Widget CreateButtonBar P ((MenuItem *mi));
char *FindFont P((char *pattern, int targetPxlSize));
void PieceMenuPopup P((Widget w, XEvent *event,
                   String *params, Cardinal *num_params));
static void PieceMenuSelect P((Widget w, ChessSquare piece, caddr_t junk));
static void DropMenuSelect P((Widget w, ChessSquare piece, caddr_t junk));
void ReadBitmap P((Pixmap *pm, String name, unsigned char bits[],
               u_int wreq, u_int hreq));
void CreateGrid P((void));
int EventToSquare P((int x, int limit));
void DrawSquare P((int row, int column, ChessSquare piece, int do_flash));
void EventProc P((Widget widget, caddr_t unused, XEvent *event));
void HandleUserMove P((Widget w, XEvent *event,
                 String *prms, Cardinal *nprms));
void AnimateUserMove P((Widget w, XEvent * event,
                 String * params, Cardinal * nParams));
void WhiteClock P((Widget w, XEvent *event,
               String *prms, Cardinal *nprms));
void BlackClock P((Widget w, XEvent *event,
               String *prms, Cardinal *nprms));
void DrawPositionProc P((Widget w, XEvent *event,
                 String *prms, Cardinal *nprms));
void XDrawPosition P((Widget w, /*Boolean*/int repaint, 
                 Board board));
void CommentPopUp P((char *title, char *label));
void CommentPopDown P((void));
void CommentCallback P((Widget w, XtPointer client_data,
                  XtPointer call_data));
void ICSInputBoxPopUp P((void));
void ICSInputBoxPopDown P((void));
void FileNamePopUp P((char *label, char *def,
                  FileProc proc, char *openMode));
void FileNamePopDown P((void));
void FileNameCallback P((Widget w, XtPointer client_data,
                   XtPointer call_data));
void FileNameAction P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void AskQuestionReplyAction P((Widget w, XEvent *event,
                    String *prms, Cardinal *nprms));
void AskQuestionProc P((Widget w, XEvent *event,
                    String *prms, Cardinal *nprms));
void AskQuestionPopDown P((void));
void PromotionPopUp P((void));
void PromotionPopDown P((void));
void PromotionCallback P((Widget w, XtPointer client_data,
                    XtPointer call_data));
void EditCommentPopDown P((void));
void EditCommentCallback P((Widget w, XtPointer client_data,
                      XtPointer call_data));
void SelectCommand P((Widget w, XtPointer client_data, XtPointer call_data));
void ResetProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void LoadGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void LoadNextGameProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void LoadPrevGameProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void ReloadGameProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void LoadPositionProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void LoadNextPositionProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void LoadPrevPositionProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void ReloadPositionProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void CopyPositionProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void PastePositionProc P((Widget w, XEvent *event, String *prms,
                    Cardinal *nprms));
void CopyGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void PasteGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void SaveGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void SavePositionProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void MailMoveProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ReloadCmailMsgProc P((Widget w, XEvent *event, String *prms,
                      Cardinal *nprms));
void QuitProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void PauseProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void MachineBlackProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void MachineWhiteProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void AnalyzeModeProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void AnalyzeFileProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void TwoMachinesProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void IcsClientProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void EditGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void EditPositionProc P((Widget w, XEvent *event,
                   String *prms, Cardinal *nprms));
void TrainingProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void EditCommentProc P((Widget w, XEvent *event,
                  String *prms, Cardinal *nprms));
void IcsInputBoxProc P((Widget w, XEvent *event,
                  String *prms, Cardinal *nprms));
void AcceptProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void DeclineProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void RematchProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void CallFlagProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void DrawProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AbortProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AdjournProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ResignProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void EnterKeyProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void StopObservingProc P((Widget w, XEvent *event, String *prms,
                    Cardinal *nprms));
void StopExaminingProc P((Widget w, XEvent *event, String *prms,
                    Cardinal *nprms));
void BackwardProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ForwardProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ToStartProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ToEndProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void RevertProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void TruncateGameProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void RetractMoveProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void MoveNowProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AlwaysQueenProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void AnimateDraggingProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void AnimateMovingProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void AutocommProc P((Widget w, XEvent *event, String *prms,
                 Cardinal *nprms));
void AutoflagProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AutoflipProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AutobsProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void AutoraiseProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AutosaveProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void BlindfoldProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void FlashMovesProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void FlipViewProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void GetMoveListProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void HighlightDraggingProc P((Widget w, XEvent *event, String *prms,
                        Cardinal *nprms));
void HighlightLastMoveProc P((Widget w, XEvent *event, String *prms,
                        Cardinal *nprms));
void MoveSoundProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void IcsAlarmProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void OldSaveStyleProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void PeriodicUpdatesProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void PonderNextMoveProc P((Widget w, XEvent *event, String *prms,
                     Cardinal *nprms));
void PopupMoveErrorsProc P((Widget w, XEvent *event, String *prms,
                  Cardinal *nprms));
void PopupExitMessageProc P((Widget w, XEvent *event, String *prms,
                       Cardinal *nprms));
void PremoveProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void QuietPlayProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ShowCoordsProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void ShowThinkingProc P((Widget w, XEvent *event, String *prms,
                   Cardinal *nprms));
void TestLegalityProc P((Widget w, XEvent *event, String *prms,
                    Cardinal *nprms));
void InfoProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void ManProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void HintProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void BookProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AboutGameProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void AboutProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void DebugProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void NothingProc P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void Iconify P((Widget w, XEvent *event, String *prms, Cardinal *nprms));
void DisplayMove P((int moveNumber));
void DisplayTitle P((char *title));
void ICSInitScript P((void));
int LoadGamePopUp P((FILE *f, int gameNumber, char *title));
void ErrorPopUp P((char *title, char *text, int modal));
void ErrorPopDown P((void));
static char *ExpandPathName P((char *path));
static void CreateAnimVars P((void));
static void DragPieceBegin P((int x, int y));
static void DragPieceMove P((int x, int y));
static void DragPieceEnd P((int x, int y));
static void DrawDragPiece P((void));
char *ModeToWidgetName P((GameMode mode));

/*
* XBoard depends on Xt R4 or higher
*/
int xtVersion = XtSpecificationRelease;

int xScreen;
Display *xDisplay;
Window xBoardWindow;
Pixel lightSquareColor, darkSquareColor, whitePieceColor, blackPieceColor,
  jailSquareColor, highlightSquareColor, premoveHighlightColor;
GC lightSquareGC, darkSquareGC, jailSquareGC, lineGC, wdPieceGC, wlPieceGC,
  bdPieceGC, blPieceGC, wbPieceGC, bwPieceGC, coordGC, highlineGC,
  wjPieceGC, bjPieceGC, prelineGC;
Pixmap iconPixmap, wIconPixmap, bIconPixmap, xMarkPixmap;
Widget shellWidget, layoutWidget, formWidget, boardWidget, messageWidget, 
  whiteTimerWidget, blackTimerWidget, titleWidget, widgetList[16], 
  commentShell, promotionShell, whitePieceMenu, blackPieceMenu, dropMenu,
  menuBarWidget, buttonBarWidget, editShell, errorShell, analysisShell,
  ICSInputShell, fileNameShell, askQuestionShell;
XSegment gridSegments[(BOARD_SIZE + 1) * 2];
XSegment jailGridSegments[(BOARD_SIZE + 3) * 2];
Font clockFontID, coordFontID;
XFontStruct *clockFontStruct, *coordFontStruct;
XtAppContext appContext;
char *layoutName;
char *oldICSInteractionTitle;

FileProc fileProc;
char *fileOpenMode;

Position commentX = -1, commentY = -1;
Dimension commentW, commentH;

int squareSize, smallLayout = 0, tinyLayout = 0,
  fromX = -1, fromY = -1, toX, toY, commentUp = False, analysisUp = False,
  ICSInputBoxUp = False, askQuestionUp = False,
  filenameUp = False, promotionUp = False, pmFromX = -1, pmFromY = -1,
  editUp = False, errorUp = False, errorExitStatus = -1, lineGap;
Pixel timerForegroundPixel, timerBackgroundPixel;
Pixel buttonForegroundPixel, buttonBackgroundPixel;
char *chessDir, *programName, *programVersion,
  *gameCopyFilename, *gamePasteFilename;

#define SOLID 0
#define OUTLINE 1
Pixmap pieceBitmap[2][6];
Pixmap xpmPieceBitmap[4][6];  /* LL, LD, DL, DD */
Pixmap xpmLightSquare, xpmDarkSquare, xpmJailSquare;
int useImages, useImageSqs;
XImage *ximPieceBitmap[4][6]; /* LL, LD, DL, DD */
Pixmap ximMaskPm[6];            /* clipmasks, used for XIM pieces */
XImage *ximLightSquare, *ximDarkSquare;
XImage *xim_Cross;

#define pieceToSolid(piece) &pieceBitmap[SOLID][((int)(piece)) % 6]
#define pieceToOutline(piece) &pieceBitmap[OUTLINE][((int)(piece)) % 6]

#define White(piece) ((int)(piece) < (int)BlackPawn)

/* Variables for doing smooth animation. This whole thing
   would be much easier if the board was double-buffered,
   but that would require a fairly major rewrite.     */

typedef struct {
      Pixmap  saveBuf;
      Pixmap      newBuf;
      GC    blitGC, pieceGC, outlineGC;
      XPoint      startSquare, prevFrame, mouseDelta;
      int   startColor;
      int   dragPiece;
      Boolean     dragActive;
        int     startBoardX, startBoardY;
    } AnimState;

/* There can be two pieces being animated at once: a player
   can begin dragging a piece before the remote opponent has moved. */

static AnimState game, player;

/* Bitmaps for use as masks when drawing XPM pieces.
   Need one for each black and white piece.           */
static Pixmap xpmMask[BlackKing + 1];

/* This magic number is the number of intermediate frames used
   in each half of the animation. For short moves it's reduced
   by 1. The total number of frames will be factor * 2 + 1.  */
#define kFactor      4

SizeDefaults sizeDefaults[] = SIZE_DEFAULTS;

MenuItem fileMenu[] = {
    {"Reset Game", ResetProc},
    {"----", NothingProc},
    {"Load Game", LoadGameProc},
    {"Load Next Game", LoadNextGameProc},
    {"Load Previous Game", LoadPrevGameProc},
    {"Reload Same Game", ReloadGameProc},
    {"Save Game", SaveGameProc},
    {"----", NothingProc},
    {"Copy Game", CopyGameProc},
    {"Paste Game", PasteGameProc},
    {"----", NothingProc},
    {"Load Position", LoadPositionProc},
    {"Load Next Position", LoadNextPositionProc},
    {"Load Previous Position", LoadPrevPositionProc},
    {"Reload Same Position", ReloadPositionProc},
    {"Save Position", SavePositionProc},
    {"----", NothingProc},
    {"Copy Position", CopyPositionProc},
    {"Paste Position", PastePositionProc},
    {"----", NothingProc},
    {"Mail Move", MailMoveProc},
    {"Reload CMail Message", ReloadCmailMsgProc},
    {"----", NothingProc},
    {"Exit", QuitProc},
    {NULL, NULL}
};

MenuItem modeMenu[] = {
    {"Machine White", MachineWhiteProc},
    {"Machine Black", MachineBlackProc},
    {"Two Machines", TwoMachinesProc},
    {"Analysis Mode", AnalyzeModeProc},
    {"Analyze File", AnalyzeFileProc },
    {"ICS Client", IcsClientProc},
    {"Edit Game", EditGameProc},
    {"Edit Position", EditPositionProc},
    {"Training", TrainingProc},
    {"----", NothingProc},
    {"Show Game List", ShowGameListProc},
    {"Show Move List", HistoryShowProc},
    {"Edit Tags", EditTagsProc},
    {"Edit Comment", EditCommentProc},
    {"ICS Input Box", IcsInputBoxProc},
    {"Pause", PauseProc},
    {NULL, NULL}
};

MenuItem actionMenu[] = {
    {"Accept", AcceptProc},
    {"Decline", DeclineProc},
    {"Rematch", RematchProc},
    {"----", NothingProc},    
    {"Call Flag", CallFlagProc},
    {"Draw", DrawProc},
    {"Adjourn", AdjournProc},
    {"Abort", AbortProc},
    {"Resign", ResignProc},
    {"----", NothingProc},    
    {"Stop Observing", StopObservingProc},
    {"Stop Examining", StopExaminingProc},
    {NULL, NULL}
};

MenuItem stepMenu[] = {
    {"Backward", BackwardProc},
    {"Forward", ForwardProc},
    {"Back to Start", ToStartProc},
    {"Forward to End", ToEndProc},
    {"Revert", RevertProc},
    {"Truncate Game", TruncateGameProc},
    {"----", NothingProc},    
    {"Move Now", MoveNowProc},
    {"Retract Move", RetractMoveProc},
    {NULL, NULL}
};    

MenuItem optionsMenu[] = {
    {"Always Queen", AlwaysQueenProc},
    {"Animate Dragging", AnimateDraggingProc},
    {"Animate Moving", AnimateMovingProc},
    {"Auto Comment", AutocommProc},
    {"Auto Flag", AutoflagProc},
    {"Auto Flip View", AutoflipProc},
    {"Auto Observe", AutobsProc},
    {"Auto Raise Board", AutoraiseProc},
    {"Auto Save", AutosaveProc},
    {"Blindfold", BlindfoldProc},
    {"Flash Moves", FlashMovesProc},
    {"Flip View", FlipViewProc},
    {"Get Move List", GetMoveListProc},
#if HIGHDRAG
    {"Highlight Dragging", HighlightDraggingProc},
#endif
    {"Highlight Last Move", HighlightLastMoveProc},
    {"Move Sound", MoveSoundProc},
    {"ICS Alarm", IcsAlarmProc},
    {"Old Save Style", OldSaveStyleProc},
    {"Periodic Updates", PeriodicUpdatesProc},  
    {"Ponder Next Move", PonderNextMoveProc},
    {"Popup Exit Message", PopupExitMessageProc},     
    {"Popup Move Errors", PopupMoveErrorsProc}, 
    {"Premove", PremoveProc},
    {"Quiet Play", QuietPlayProc},
    {"Show Coords", ShowCoordsProc},
    {"Show Thinking", ShowThinkingProc},
    {"Test Legality", TestLegalityProc},
    {NULL, NULL}
};

MenuItem helpMenu[] = {
    {"Info XBoard", InfoProc},
    {"Man XBoard", ManProc},
    {"----", NothingProc},
    {"Hint", HintProc},
    {"Book", BookProc},
    {"----", NothingProc},
    {"About XBoard", AboutProc},
    {NULL, NULL}
};

Menu menuBar[] = {
    {"File", fileMenu},
    {"Mode", modeMenu},
    {"Action", actionMenu},
    {"Step", stepMenu},
    {"Options", optionsMenu},
    {"Help", helpMenu},
    {NULL, NULL}
};

#define PAUSE_BUTTON "P"
MenuItem buttonBar[] = {
    {"<<", ToStartProc},
    {"<", BackwardProc},
    {PAUSE_BUTTON, PauseProc},
    {">", ForwardProc},
    {">>", ToEndProc},
    {NULL, NULL}
};

#define PIECE_MENU_SIZE 11
String pieceMenuStrings[2][PIECE_MENU_SIZE] = {
    { "White", "----", "Pawn", "Knight", "Bishop", "Rook", "Queen", "King",
      "----", "Empty square", "Clear board" },
    { "Black", "----", "Pawn", "Knight", "Bishop", "Rook", "Queen", "King",
      "----", "Empty square", "Clear board" },
  };
/* must be in same order as PieceMenuStrings! */
ChessSquare pieceMenuTranslation[2][PIECE_MENU_SIZE] = {
    { WhitePlay, (ChessSquare) 0, WhitePawn, WhiteKnight, WhiteBishop,
      WhiteRook, WhiteQueen, WhiteKing,
      (ChessSquare) 0, EmptySquare, ClearBoard },
    { BlackPlay, (ChessSquare) 0, BlackPawn, BlackKnight, BlackBishop,
      BlackRook, BlackQueen, BlackKing,
      (ChessSquare) 0, EmptySquare, ClearBoard },
};

#define DROP_MENU_SIZE 6
String dropMenuStrings[DROP_MENU_SIZE] = {
    "----", "Pawn", "Knight", "Bishop", "Rook", "Queen"
  };
/* must be in same order as PieceMenuStrings! */
ChessSquare dropMenuTranslation[DROP_MENU_SIZE] = {
    (ChessSquare) 0, WhitePawn, WhiteKnight, WhiteBishop,
    WhiteRook, WhiteQueen
};

typedef struct {
    char piece;
    char* widget;
} DropMenuEnables;

DropMenuEnables dmEnables[] = {
    { 'P', "Pawn" },
    { 'N', "Knight" },
    { 'B', "Bishop" },
    { 'R', "Rook" },
    { 'Q', "Queen" }
};

Arg shellArgs[] = {
    { XtNwidth, 0 },
    { XtNheight, 0 },
    { XtNminWidth, 0 },
    { XtNminHeight, 0 },
    { XtNmaxWidth, 0 },
    { XtNmaxHeight, 0 }
};

Arg layoutArgs[] = {
    { XtNborderWidth, 0 },
    { XtNdefaultDistance, 0 },
};

Arg formArgs[] = {
    { XtNborderWidth, 0 },
    { XtNresizable, (XtArgVal) True },
};

Arg boardArgs[] = {
    { XtNborderWidth, 0 },
    { XtNwidth, 0 },
    { XtNheight, 0 }
};

Arg titleArgs[] = {
    { XtNjustify, (XtArgVal) XtJustifyRight },
    { XtNlabel, (XtArgVal) "..." },
    { XtNresizable, (XtArgVal) True },
    { XtNresize, (XtArgVal) False }
};

Arg messageArgs[] = {
    { XtNjustify, (XtArgVal) XtJustifyLeft },
    { XtNlabel, (XtArgVal) "..." },
    { XtNresizable, (XtArgVal) True },
    { XtNresize, (XtArgVal) False }
};

Arg timerArgs[] = {
    { XtNborderWidth, 0 },
    { XtNjustify, (XtArgVal) XtJustifyLeft }
};

XtResource clientResources[] = {
    { "whitePieceColor", "whitePieceColor", XtRString, sizeof(String),
      XtOffset(AppDataPtr, whitePieceColor), XtRString,
      WHITE_PIECE_COLOR },
    { "blackPieceColor", "blackPieceColor", XtRString, sizeof(String),
      XtOffset(AppDataPtr, blackPieceColor), XtRString,
      BLACK_PIECE_COLOR },
    { "lightSquareColor", "lightSquareColor", XtRString,
      sizeof(String), XtOffset(AppDataPtr, lightSquareColor),
      XtRString, LIGHT_SQUARE_COLOR }, 
    { "darkSquareColor", "darkSquareColor", XtRString, sizeof(String),
      XtOffset(AppDataPtr, darkSquareColor), XtRString,
      DARK_SQUARE_COLOR },
    { "highlightSquareColor", "highlightSquareColor", XtRString,
      sizeof(String),   XtOffset(AppDataPtr, highlightSquareColor),
      XtRString, HIGHLIGHT_SQUARE_COLOR },
    { "premoveHighlightColor", "premoveHighlightColor", XtRString,
      sizeof(String),   XtOffset(AppDataPtr, premoveHighlightColor),
      XtRString, PREMOVE_HIGHLIGHT_COLOR },
    { "movesPerSession", "movesPerSession", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, movesPerSession), XtRImmediate,
      (XtPointer) MOVES_PER_SESSION },
    { "timeIncrement", "timeIncrement", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, timeIncrement), XtRImmediate,
      (XtPointer) TIME_INCREMENT },
    { "initString", "initString", XtRString, sizeof(String),
      XtOffset(AppDataPtr, initString), XtRString, INIT_STRING },
    { "secondInitString", "secondInitString", XtRString, sizeof(String),
      XtOffset(AppDataPtr, secondInitString), XtRString, INIT_STRING },
    { "firstComputerString", "firstComputerString", XtRString,
        sizeof(String), XtOffset(AppDataPtr, firstComputerString), XtRString,
      COMPUTER_STRING },
    { "secondComputerString", "secondComputerString", XtRString,
        sizeof(String), XtOffset(AppDataPtr, secondComputerString), XtRString,
      COMPUTER_STRING },
    { "firstChessProgram", "firstChessProgram", XtRString,
      sizeof(String), XtOffset(AppDataPtr, firstChessProgram),
      XtRString, FIRST_CHESS_PROGRAM },
    { "secondChessProgram", "secondChessProgram", XtRString,
      sizeof(String), XtOffset(AppDataPtr, secondChessProgram),
      XtRString, SECOND_CHESS_PROGRAM },
    { "firstPlaysBlack", "firstPlaysBlack", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, firstPlaysBlack),
      XtRImmediate, (XtPointer) False },
    { "noChessProgram", "noChessProgram", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, noChessProgram),
      XtRImmediate, (XtPointer) False },
    { "firstHost", "firstHost", XtRString, sizeof(String),
      XtOffset(AppDataPtr, firstHost), XtRString, FIRST_HOST },
    { "secondHost", "secondHost", XtRString, sizeof(String),
      XtOffset(AppDataPtr, secondHost), XtRString, SECOND_HOST },
    { "firstDirectory", "firstDirectory", XtRString, sizeof(String),
      XtOffset(AppDataPtr, firstDirectory), XtRString, "" },
    { "secondDirectory", "secondDirectory", XtRString, sizeof(String),
      XtOffset(AppDataPtr, secondDirectory), XtRString, "" },
    { "bitmapDirectory", "bitmapDirectory", XtRString,
      sizeof(String), XtOffset(AppDataPtr, bitmapDirectory),
      XtRString, "" },
    { "remoteShell", "remoteShell", XtRString, sizeof(String),
      XtOffset(AppDataPtr, remoteShell), XtRString, REMOTE_SHELL },
    { "remoteUser", "remoteUser", XtRString, sizeof(String),
      XtOffset(AppDataPtr, remoteUser), XtRString, "" },
    { "timeDelay", "timeDelay", XtRFloat, sizeof(float),
      XtOffset(AppDataPtr, timeDelay), XtRString,
      (XtPointer) TIME_DELAY_QUOTE },
    { "timeControl", "timeControl", XtRString, sizeof(String),
      XtOffset(AppDataPtr, timeControl), XtRString,
      (XtPointer) TIME_CONTROL },
    { "internetChessServerMode", "internetChessServerMode",
      XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, icsActive), XtRImmediate,
      (XtPointer) False },
    { "internetChessServerHost", "internetChessServerHost",
      XtRString, sizeof(String),
      XtOffset(AppDataPtr, icsHost),
      XtRString, (XtPointer) ICS_HOST },
    { "internetChessServerPort", "internetChessServerPort",
      XtRString, sizeof(String),
      XtOffset(AppDataPtr, icsPort), XtRString,
      (XtPointer) ICS_PORT },
    { "internetChessServerCommPort", "internetChessServerCommPort",
      XtRString, sizeof(String),
      XtOffset(AppDataPtr, icsCommPort), XtRString,
      ICS_COMM_PORT },
    { "internetChessServerLogonScript", "internetChessServerLogonScript",
      XtRString, sizeof(String),
      XtOffset(AppDataPtr, icsLogon), XtRString,
      ICS_LOGON },
    { "internetChessServerHelper", "internetChessServerHelper",
      XtRString, sizeof(String),
      XtOffset(AppDataPtr, icsHelper), XtRString, "" },
    { "internetChessServerInputBox", "internetChessServerInputBox",
      XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, icsInputBox), XtRImmediate,
      (XtPointer) False },
    { "icsAlarm", "icsAlarm",
      XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, icsAlarm), XtRImmediate,
      (XtPointer) True },
    { "icsAlarmTime", "icsAlarmTime",
      XtRInt, sizeof(int),
      XtOffset(AppDataPtr, icsAlarmTime), XtRImmediate,
      (XtPointer) 5000 },
    { "useTelnet", "useTelnet", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, useTelnet), XtRImmediate,
      (XtPointer) False },
    { "telnetProgram", "telnetProgram", XtRString, sizeof(String),
      XtOffset(AppDataPtr, telnetProgram), XtRString, TELNET_PROGRAM },
    { "gateway", "gateway", XtRString, sizeof(String),
      XtOffset(AppDataPtr, gateway), XtRString, "" },
    { "loadGameFile", "loadGameFile", XtRString, sizeof(String),
      XtOffset(AppDataPtr, loadGameFile), XtRString, "" },
    { "loadGameIndex", "loadGameIndex",
      XtRInt, sizeof(int),
      XtOffset(AppDataPtr, loadGameIndex), XtRImmediate,
      (XtPointer) 0 },
    { "saveGameFile", "saveGameFile", XtRString, sizeof(String),
      XtOffset(AppDataPtr, saveGameFile), XtRString, "" },
    { "autoRaiseBoard", "autoRaiseBoard", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoRaiseBoard),
      XtRImmediate, (XtPointer) True },
    { "autoSaveGames", "autoSaveGames", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoSaveGames),
      XtRImmediate, (XtPointer) False },
    { "blindfold", "blindfold", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, blindfold),
      XtRImmediate, (XtPointer) False },
    { "loadPositionFile", "loadPositionFile", XtRString,
      sizeof(String), XtOffset(AppDataPtr, loadPositionFile),
      XtRString, "" },
    { "loadPositionIndex", "loadPositionIndex",
      XtRInt, sizeof(int),
      XtOffset(AppDataPtr, loadPositionIndex), XtRImmediate,
      (XtPointer) 1 },
    { "savePositionFile", "savePositionFile", XtRString,
      sizeof(String), XtOffset(AppDataPtr, savePositionFile),
      XtRString, "" },
    { "matchMode", "matchMode", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, matchMode), XtRImmediate, (XtPointer) False },
    { "matchGames", "matchGames", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, matchGames), XtRImmediate,
      (XtPointer) 0 },
    { "monoMode", "monoMode", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, monoMode), XtRImmediate,
      (XtPointer) False },
    { "debugMode", "debugMode", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, debugMode), XtRImmediate,
      (XtPointer) False },
    { "clockMode", "clockMode", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, clockMode), XtRImmediate,
      (XtPointer) True },
    { "boardSize", "boardSize", XtRString, sizeof(String),
      XtOffset(AppDataPtr, boardSize), XtRString, "" },
    { "searchTime", "searchTime", XtRString, sizeof(String),
      XtOffset(AppDataPtr, searchTime), XtRString,
      (XtPointer) "" },
    { "searchDepth", "searchDepth", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, searchDepth), XtRImmediate, 
      (XtPointer) 0 },
    { "showCoords", "showCoords", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, showCoords), XtRImmediate,
      (XtPointer) False },
    { "showJail", "showJail", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, showJail), XtRImmediate,
      (XtPointer) 0 },
    { "showThinking", "showThinking", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, showThinking), XtRImmediate,
      (XtPointer) False },
    { "ponderNextMove", "ponderNextMove", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, ponderNextMove), XtRImmediate,
      (XtPointer) True },
    { "periodicUpdates", "periodicUpdates", XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, periodicUpdates), XtRImmediate,
      (XtPointer) True },
    { "clockFont", "clockFont", XtRString, sizeof(String),
      XtOffset(AppDataPtr, clockFont), XtRString, CLOCK_FONT },
    { "coordFont", "coordFont", XtRString, sizeof(String),
      XtOffset(AppDataPtr, coordFont), XtRString, COORD_FONT },
    { "font", "font", XtRString, sizeof(String),
      XtOffset(AppDataPtr, font), XtRString, DEFAULT_FONT },
    { "ringBellAfterMoves", "ringBellAfterMoves",
      XtRBoolean, sizeof(Boolean),
      XtOffset(AppDataPtr, ringBellAfterMoves),
      XtRImmediate, (XtPointer) False     },
    { "autoCallFlag", "autoCallFlag", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoCallFlag),
      XtRImmediate, (XtPointer) False },
    { "autoFlipView", "autoFlipView", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoFlipView),
      XtRImmediate, (XtPointer) True },
    { "autoObserve", "autoObserve", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoObserve),
      XtRImmediate, (XtPointer) False },
    { "autoComment", "autoComment", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, autoComment),
      XtRImmediate, (XtPointer) False },
    { "getMoveList", "getMoveList", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, getMoveList),
      XtRImmediate, (XtPointer) True },
#if HIGHDRAG
    { "highlightDragging", "highlightDragging", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, highlightDragging),
      XtRImmediate, (XtPointer) False },
#endif
    { "highlightLastMove", "highlightLastMove", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, highlightLastMove),
      XtRImmediate, (XtPointer) False },
    { "premove", "premove", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, premove),
        XtRImmediate, (XtPointer) True },
    { "testLegality", "testLegality", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, testLegality),
      XtRImmediate, (XtPointer) True },
    { "flipView", "flipView", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, flipView),
      XtRImmediate, (XtPointer) False },
    { "cmail", "cmailGameName", XtRString, sizeof(String),
      XtOffset(AppDataPtr, cmailGameName), XtRString, "" },
    { "alwaysPromoteToQueen", "alwaysPromoteToQueen", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, alwaysPromoteToQueen),
      XtRImmediate, (XtPointer) False },
    { "oldSaveStyle", "oldSaveStyle", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, oldSaveStyle),
      XtRImmediate, (XtPointer) False },
    { "quietPlay", "quietPlay", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, quietPlay),
      XtRImmediate, (XtPointer) False },
    { "titleInWindow", "titleInWindow", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, titleInWindow),
      XtRImmediate, (XtPointer) False },
    { "localLineEditing", "localLineEditing", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, localLineEditing),
      XtRImmediate, (XtPointer) True }, /* not implemented, must be True */
#ifdef ZIPPY
    { "zippyTalk", "zippyTalk", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyTalk),
      XtRImmediate, (XtPointer) ZIPPY_TALK },
    { "zippyPlay", "zippyPlay", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyPlay),
      XtRImmediate, (XtPointer) ZIPPY_PLAY },
    { "zippyLines", "zippyLines", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyLines), XtRString, ZIPPY_LINES },
    { "zippyPinhead", "zippyPinhead", XtRString, sizeof(String),
        XtOffset(AppDataPtr, zippyPinhead), XtRString, ZIPPY_PINHEAD },
    { "zippyPassword", "zippyPassword", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyPassword), XtRString, ZIPPY_PASSWORD },
    { "zippyPassword2", "zippyPassword2", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyPassword2), XtRString, ZIPPY_PASSWORD2 },
    { "zippyWrongPassword", "zippyWrongPassword", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyWrongPassword), XtRString,
        ZIPPY_WRONG_PASSWORD },
    { "zippyAcceptOnly", "zippyAcceptOnly", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyAcceptOnly), XtRString, ZIPPY_ACCEPT_ONLY },
    { "zippyUseI", "zippyUseI", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyUseI),
        XtRImmediate, (XtPointer) ZIPPY_USE_I },
    { "zippyBughouse", "zippyBughouse", XtRInt,
      sizeof(int), XtOffset(AppDataPtr, zippyBughouse),
      XtRImmediate, (XtPointer) ZIPPY_BUGHOUSE },
    { "zippyNoplayCrafty", "zippyNoplayCrafty", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyNoplayCrafty),
        XtRImmediate, (XtPointer) ZIPPY_NOPLAY_CRAFTY },
    { "zippyGameEnd", "zippyGameEnd", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyGameEnd), XtRString, ZIPPY_GAME_END },
    { "zippyGameStart", "zippyGameStart", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyGameStart), XtRString, ZIPPY_GAME_START },
    { "zippyAdjourn", "zippyAdjourn", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyAdjourn),
      XtRImmediate, (XtPointer) ZIPPY_ADJOURN },
    { "zippyAbort", "zippyAbort", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, zippyAbort),
      XtRImmediate, (XtPointer) ZIPPY_ABORT },
    { "zippyVariants", "zippyVariants", XtRString, sizeof(String),
      XtOffset(AppDataPtr, zippyVariants), XtRString, ZIPPY_VARIANTS },
    { "zippyMaxGames", "zippyMaxGames", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, zippyMaxGames), XtRImmediate,
        (XtPointer) ZIPPY_MAX_GAMES },
    { "zippyReplayTimeout", "zippyReplayTimeout", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, zippyReplayTimeout), XtRImmediate,
        (XtPointer) ZIPPY_REPLAY_TIMEOUT },
#endif
    { "flashCount", "flashCount", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, flashCount), XtRImmediate,
      (XtPointer) FLASH_COUNT  },
    { "flashRate", "flashRate", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, flashRate), XtRImmediate,
      (XtPointer) FLASH_RATE },
    { "pixmapDirectory", "pixmapDirectory", XtRString,
      sizeof(String), XtOffset(AppDataPtr, pixmapDirectory),
      XtRString, "" },
    { "msLoginDelay", "msLoginDelay", XtRInt, sizeof(int),
      XtOffset(AppDataPtr, msLoginDelay), XtRImmediate,
      (XtPointer) MS_LOGIN_DELAY },
    { "colorizeMessages", "colorizeMessages", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, colorize),
      XtRImmediate, (XtPointer) False },  
    { "colorShout", "colorShout", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorShout),
      XtRString, COLOR_SHOUT },
    { "colorSShout", "colorSShout", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorSShout),
      XtRString, COLOR_SSHOUT },
    { "colorChannel1", "colorChannel1", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorChannel1),
      XtRString, COLOR_CHANNEL1 },
    { "colorChannel", "colorChannel", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorChannel),
      XtRString, COLOR_CHANNEL },
    { "colorKibitz", "colorKibitz", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorKibitz),
      XtRString, COLOR_KIBITZ },
    { "colorTell", "colorTell", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorTell),
      XtRString, COLOR_TELL },
    { "colorChallenge", "colorChallenge", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorChallenge),
      XtRString, COLOR_CHALLENGE },
    { "colorRequest", "colorRequest", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorRequest),
      XtRString, COLOR_REQUEST },
    { "colorSeek", "colorSeek", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorSeek),
      XtRString, COLOR_SEEK },
    { "colorNormal", "colorNormal", XtRString,
      sizeof(String), XtOffset(AppDataPtr, colorNormal),
      XtRString, COLOR_NORMAL },    
    { "soundProgram", "soundProgram", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundProgram),
      XtRString, "play" },
    { "soundShout", "soundShout", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundShout),
      XtRString, "" },
    { "soundSShout", "soundSShout", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundSShout),
      XtRString, "" },
    { "soundChannel1", "soundChannel1", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundChannel1),
      XtRString, "" },
    { "soundChannel", "soundChannel", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundChannel),
      XtRString, "" },
    { "soundKibitz", "soundKibitz", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundKibitz),
      XtRString, "" },
    { "soundTell", "soundTell", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundTell),
      XtRString, "" },
    { "soundChallenge", "soundChallenge", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundChallenge),
      XtRString, "" },
    { "soundRequest", "soundRequest", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundRequest),
      XtRString, "" },
    { "soundSeek", "soundSeek", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundSeek),
      XtRString, "" },
    { "soundMove", "soundMove", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundMove),
      XtRString, "$" },
    { "soundIcsWin", "soundIcsWin", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundIcsWin),
      XtRString, "" },
    { "soundIcsLoss", "soundIcsLoss", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundIcsLoss),
      XtRString, "" },
    { "soundIcsDraw", "soundIcsDraw", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundIcsDraw),
      XtRString, "" },
    { "soundIcsUnfinished", "soundIcsUnfinished", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundIcsUnfinished),
      XtRString, "" },
    { "soundIcsAlarm", "soundIcsAlarm", XtRString,
      sizeof(String), XtOffset(AppDataPtr, soundIcsAlarm),
      XtRString, "$" },
    { "reuseFirst", "reuseFirst", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, reuseFirst),
      XtRImmediate, (XtPointer) True },
    { "reuseSecond", "reuseSecond", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, reuseSecond),
      XtRImmediate, (XtPointer) True },
    { "animateDragging", "animateDragging", XtRBoolean,
        sizeof(Boolean), XtOffset(AppDataPtr, animateDragging),
      XtRImmediate, (XtPointer) True },
    { "animateMoving", "animateMoving", XtRBoolean,
        sizeof(Boolean), XtOffset(AppDataPtr, animate),
      XtRImmediate, (XtPointer) True },
    { "animateSpeed", "animateSpeed", XtRInt,
        sizeof(int), XtOffset(AppDataPtr, animSpeed),
      XtRImmediate, (XtPointer)10 },
    { "popupExitMessage", "popupExitMessage", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, popupExitMessage),
      XtRImmediate, (XtPointer) True },
    { "popupMoveErrors", "popupMoveErrors", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, popupMoveErrors),
      XtRImmediate, (XtPointer) False },
    { "fontSizeTolerance", "fontSizeTolerance", XtRInt,
        sizeof(int), XtOffset(AppDataPtr, fontSizeTolerance),
      XtRImmediate, (XtPointer)4 },
    { "initialMode", "initialMode", XtRString,
        sizeof(String), XtOffset(AppDataPtr, initialMode),
      XtRImmediate, (XtPointer) "" },
    { "variant", "variant", XtRString,
        sizeof(String), XtOffset(AppDataPtr, variant),
      XtRImmediate, (XtPointer) "normal" },
    { "firstProtocolVersion", "firstProtocolVersion", XtRInt,
        sizeof(int), XtOffset(AppDataPtr, firstProtocolVersion),
      XtRImmediate, (XtPointer)PROTOVER },
    { "secondProtocolVersion", "secondProtocolVersion", XtRInt,
        sizeof(int), XtOffset(AppDataPtr, secondProtocolVersion),
      XtRImmediate, (XtPointer)PROTOVER },
    { "showButtonBar", "showButtonBar", XtRBoolean,
      sizeof(Boolean), XtOffset(AppDataPtr, showButtonBar),
      XtRImmediate, (XtPointer) True },
};

XrmOptionDescRec shellOptions[] = {
    { "-whitePieceColor", "whitePieceColor", XrmoptionSepArg, NULL },
    { "-blackPieceColor", "blackPieceColor", XrmoptionSepArg, NULL },
    { "-lightSquareColor", "lightSquareColor", XrmoptionSepArg, NULL },
    { "-darkSquareColor", "darkSquareColor", XrmoptionSepArg, NULL },
    { "-highlightSquareColor", "highlightSquareColor", XrmoptionSepArg, NULL },
    { "-premoveHighlightColor", "premoveHighlightColor", XrmoptionSepArg,NULL},
    { "-movesPerSession", "movesPerSession", XrmoptionSepArg, NULL },
    { "-mps", "movesPerSession", XrmoptionSepArg, NULL },
    { "-timeIncrement", "timeIncrement", XrmoptionSepArg, NULL },
    { "-inc", "timeIncrement", XrmoptionSepArg, NULL },
    { "-initString", "initString", XrmoptionSepArg, NULL },
    { "-firstInitString", "initString", XrmoptionSepArg, NULL },
    { "-secondInitString", "secondInitString", XrmoptionSepArg, NULL },
    { "-firstComputerString", "firstComputerString", XrmoptionSepArg, NULL },
    { "-secondComputerString", "secondComputerString", XrmoptionSepArg, NULL },
    { "-firstChessProgram", "firstChessProgram", XrmoptionSepArg, NULL },
    { "-fcp", "firstChessProgram", XrmoptionSepArg, NULL },
    { "-secondChessProgram", "secondChessProgram", XrmoptionSepArg, NULL },
    { "-scp", "secondChessProgram", XrmoptionSepArg, NULL },
    { "-firstPlaysBlack", "firstPlaysBlack", XrmoptionSepArg, NULL },
    { "-fb", "firstPlaysBlack", XrmoptionNoArg, "True" },
    { "-xfb", "firstPlaysBlack", XrmoptionNoArg, "False" },
    { "-noChessProgram", "noChessProgram", XrmoptionSepArg, NULL },
    { "-ncp", "noChessProgram", XrmoptionNoArg, "True" },
    { "-xncp", "noChessProgram", XrmoptionNoArg, "False" },
    { "-firstHost", "firstHost", XrmoptionSepArg, NULL },
    { "-fh", "firstHost", XrmoptionSepArg, NULL },
    { "-secondHost", "secondHost", XrmoptionSepArg, NULL },
    { "-sh", "secondHost", XrmoptionSepArg, NULL },
    { "-firstDirectory", "firstDirectory", XrmoptionSepArg, NULL },
    { "-fd", "firstDirectory", XrmoptionSepArg, NULL },
    { "-secondDirectory", "secondDirectory", XrmoptionSepArg, NULL },
    { "-sd", "secondDirectory", XrmoptionSepArg, NULL },
    { "-bitmapDirectory", "bitmapDirectory", XrmoptionSepArg, NULL },
    { "-bm", "bitmapDirectory", XrmoptionSepArg, NULL },
    { "-remoteShell", "remoteShell", XrmoptionSepArg, NULL },
    { "-rsh", "remoteShell", XrmoptionSepArg, NULL },
    { "-remoteUser", "remoteUser", XrmoptionSepArg, NULL },
    { "-ruser", "remoteUser", XrmoptionSepArg, NULL },
    { "-timeDelay", "timeDelay", XrmoptionSepArg, NULL },
    { "-td", "timeDelay", XrmoptionSepArg, NULL },
    { "-timeControl", "timeControl", XrmoptionSepArg, NULL },
    { "-tc", "timeControl", XrmoptionSepArg, NULL },
    { "-internetChessServerMode", "internetChessServerMode",
      XrmoptionSepArg, NULL },
    { "-ics", "internetChessServerMode", XrmoptionNoArg, "True" },
    { "-xics", "internetChessServerMode", XrmoptionNoArg, "False" },
    { "-internetChessServerHost", "internetChessServerHost",
      XrmoptionSepArg, NULL },
    { "-icshost", "internetChessServerHost", XrmoptionSepArg, NULL },
    { "-internetChessServerPort", "internetChessServerPort",
      XrmoptionSepArg, NULL },
    { "-icsport", "internetChessServerPort", XrmoptionSepArg, NULL },
    { "-internetChessServerCommPort", "internetChessServerCommPort",
      XrmoptionSepArg, NULL },
    { "-icscomm", "internetChessServerCommPort", XrmoptionSepArg, NULL },
    { "-internetChessServerLogonScript", "internetChessServerLogonScript",
      XrmoptionSepArg, NULL },
    { "-icslogon", "internetChessServerLogonScript", XrmoptionSepArg, NULL },
    { "-internetChessServerHelper", "internetChessServerHelper",
      XrmoptionSepArg, NULL },
    { "-icshelper", "internetChessServerHelper", XrmoptionSepArg, NULL },
    { "-internetChessServerInputBox", "internetChessServerInputBox",
      XrmoptionSepArg, NULL },
    { "-icsinput", "internetChessServerInputBox", XrmoptionNoArg, "True" },
    { "-xicsinput", "internetChessServerInputBox", XrmoptionNoArg, "False" },
    { "-icsAlarm", "icsAlarm", XrmoptionSepArg, NULL },
    { "-alarm", "icsAlarm", XrmoptionNoArg, "True" },
    { "-xalarm", "icsAlarm", XrmoptionNoArg, "False" },
    { "-icsAlarmTime", "icsAlarmTime", XrmoptionSepArg, NULL },
    { "-useTelnet", "useTelnet", XrmoptionSepArg, NULL },
    { "-telnet", "useTelnet", XrmoptionNoArg, "True" },
    { "-xtelnet", "useTelnet", XrmoptionNoArg, "False" },
    { "-telnetProgram", "telnetProgram", XrmoptionSepArg, NULL },
    { "-gateway", "gateway", XrmoptionSepArg, NULL },
    { "-loadGameFile", "loadGameFile", XrmoptionSepArg, NULL },
    { "-lgf", "loadGameFile", XrmoptionSepArg, NULL },
    { "-loadGameIndex", "loadGameIndex", XrmoptionSepArg, NULL },
    { "-lgi", "loadGameIndex", XrmoptionSepArg, NULL },
    { "-saveGameFile", "saveGameFile", XrmoptionSepArg, NULL },
    { "-sgf", "saveGameFile", XrmoptionSepArg, NULL },
    { "-autoSaveGames", "autoSaveGames", XrmoptionSepArg, NULL },
    { "-autosave", "autoSaveGames", XrmoptionNoArg, "True" },
    { "-xautosave", "autoSaveGames", XrmoptionNoArg, "False" },
    { "-autoRaiseBoard", "autoRaiseBoard", XrmoptionSepArg, NULL },
    { "-autoraise", "autoRaiseBoard", XrmoptionNoArg, "True" },
    { "-xautoraise", "autoRaiseBoard", XrmoptionNoArg, "False" },
    { "-blindfold", "blindfold", XrmoptionSepArg, NULL },
    { "-blind", "blindfold", XrmoptionNoArg, "True" },
    { "-xblind", "blindfold", XrmoptionNoArg, "False" },
    { "-loadPositionFile", "loadPositionFile", XrmoptionSepArg, NULL },
    { "-lpf", "loadPositionFile", XrmoptionSepArg, NULL },
    { "-loadPositionIndex", "loadPositionIndex", XrmoptionSepArg, NULL },
    { "-lpi", "loadPositionIndex", XrmoptionSepArg, NULL },
    { "-savePositionFile", "savePositionFile", XrmoptionSepArg, NULL },
    { "-spf", "savePositionFile", XrmoptionSepArg, NULL },
    { "-matchMode", "matchMode", XrmoptionSepArg, NULL },
    { "-mm", "matchMode", XrmoptionNoArg, "True" },
    { "-xmm", "matchMode", XrmoptionNoArg, "False" },
    { "-matchGames", "matchGames", XrmoptionSepArg, NULL },
    { "-mg", "matchGames", XrmoptionSepArg, NULL },
    { "-monoMode", "monoMode", XrmoptionSepArg, NULL },
    { "-mono", "monoMode", XrmoptionNoArg, "True" },
    { "-xmono", "monoMode", XrmoptionNoArg, "False" },
    { "-debugMode", "debugMode", XrmoptionSepArg, NULL },
    { "-debug", "debugMode", XrmoptionNoArg, "True" },
    { "-xdebug", "debugMode", XrmoptionNoArg, "False" },
    { "-clockMode", "clockMode", XrmoptionSepArg, NULL },
    { "-clock", "clockMode", XrmoptionNoArg, "True" },
    { "-xclock", "clockMode", XrmoptionNoArg, "False" },
    { "-boardSize", "boardSize", XrmoptionSepArg, NULL },
    { "-size", "boardSize", XrmoptionSepArg, NULL },
    { "-searchTime", "searchTime", XrmoptionSepArg, NULL },
    { "-st", "searchTime", XrmoptionSepArg, NULL },
    { "-searchDepth", "searchDepth", XrmoptionSepArg, NULL },
    { "-depth", "searchDepth", XrmoptionSepArg, NULL },
    { "-showCoords", "showCoords", XrmoptionSepArg, NULL },
    { "-coords", "showCoords", XrmoptionNoArg, "True" },
    { "-xcoords", "showCoords", XrmoptionNoArg, "False" },
#if JAIL
    { "-showJail", "showJail", XrmoptionSepArg, NULL },
    { "-jail", "showJail", XrmoptionNoArg, "1" },
    { "-sidejail", "showJail", XrmoptionNoArg, "2" },
    { "-xjail", "showJail", XrmoptionNoArg, "0" },
#endif
    { "-showThinking", "showThinking", XrmoptionSepArg, NULL },
    { "-thinking", "showThinking", XrmoptionNoArg, "True" },
    { "-xthinking", "showThinking", XrmoptionNoArg, "False" },
    { "-ponderNextMove", "ponderNextMove", XrmoptionSepArg, NULL },
    { "-ponder", "ponderNextMove", XrmoptionNoArg, "True" },
    { "-xponder", "ponderNextMove", XrmoptionNoArg, "False" },
    { "-periodicUpdates", "periodicUpdates", XrmoptionSepArg, NULL },
    { "-periodic", "periodicUpdates", XrmoptionNoArg, "True" },
    { "-xperiodic", "periodicUpdates", XrmoptionNoArg, "False" },
    { "-clockFont", "clockFont", XrmoptionSepArg, NULL },
    { "-coordFont", "coordFont", XrmoptionSepArg, NULL },
    { "-font", "font", XrmoptionSepArg, NULL },
    { "-ringBellAfterMoves", "ringBellAfterMoves", XrmoptionSepArg, NULL },
    { "-bell", "ringBellAfterMoves", XrmoptionNoArg, "True" },
    { "-xbell", "ringBellAfterMoves", XrmoptionNoArg, "False" },
    { "-movesound", "ringBellAfterMoves", XrmoptionNoArg, "True" },
    { "-xmovesound", "ringBellAfterMoves", XrmoptionNoArg, "False" },
    { "-autoCallFlag", "autoCallFlag", XrmoptionSepArg, NULL },
    { "-autoflag", "autoCallFlag", XrmoptionNoArg, "True" },
    { "-xautoflag", "autoCallFlag", XrmoptionNoArg, "False" },
    { "-autoFlipView", "autoFlipView", XrmoptionSepArg, NULL },
    { "-autoflip", "autoFlipView", XrmoptionNoArg, "True" },
    { "-xautoflip", "autoFlipView", XrmoptionNoArg, "False" },
    { "-autoObserve", "autoObserve", XrmoptionSepArg, NULL },
    { "-autobs", "autoObserve", XrmoptionNoArg, "True" },
    { "-xautobs", "autoObserve", XrmoptionNoArg, "False" },
    { "-autoComment", "autoComment", XrmoptionSepArg, NULL },
    { "-autocomm", "autoComment", XrmoptionNoArg, "True" },
    { "-xautocomm", "autoComment", XrmoptionNoArg, "False" },
    { "-getMoveList", "getMoveList", XrmoptionSepArg, NULL },
    { "-moves", "getMoveList", XrmoptionNoArg, "True" },
    { "-xmoves", "getMoveList", XrmoptionNoArg, "False" },
#if HIGHDRAG
    { "-highlightDragging", "highlightDragging", XrmoptionSepArg, NULL },
    { "-highdrag", "highlightDragging", XrmoptionNoArg, "True" },
    { "-xhighdrag", "highlightDragging", XrmoptionNoArg, "False" },
#endif
    { "-highlightLastMove", "highlightLastMove", XrmoptionSepArg, NULL },
    { "-highlight", "highlightLastMove", XrmoptionNoArg, "True" },
    { "-xhighlight", "highlightLastMove", XrmoptionNoArg, "False" },
    { "-premove", "premove", XrmoptionSepArg, NULL },
    { "-pre", "premove", XrmoptionNoArg, "True" },
    { "-xpre", "premove", XrmoptionNoArg, "False" },
    { "-testLegality", "testLegality", XrmoptionSepArg, NULL },
    { "-legal", "testLegality", XrmoptionNoArg, "True" },
    { "-xlegal", "testLegality", XrmoptionNoArg, "False" },
    { "-flipView", "flipView", XrmoptionSepArg, NULL },
    { "-flip", "flipView", XrmoptionNoArg, "True" },
    { "-xflip", "flipView", XrmoptionNoArg, "False" },
    { "-cmail", "cmailGameName", XrmoptionSepArg, NULL },
    { "-alwaysPromoteToQueen", "alwaysPromoteToQueen",
      XrmoptionSepArg, NULL },
    { "-queen", "alwaysPromoteToQueen", XrmoptionNoArg, "True" },
    { "-xqueen", "alwaysPromoteToQueen", XrmoptionNoArg, "False" },
    { "-oldSaveStyle", "oldSaveStyle", XrmoptionSepArg, NULL },
    { "-oldsave", "oldSaveStyle", XrmoptionNoArg, "True" },
    { "-xoldsave", "oldSaveStyle", XrmoptionNoArg, "False" },
    { "-quietPlay", "quietPlay", XrmoptionSepArg, NULL },
    { "-quiet", "quietPlay", XrmoptionNoArg, "True" },
    { "-xquiet", "quietPlay", XrmoptionNoArg, "False" },
    { "-titleInWindow", "titleInWindow", XrmoptionSepArg, NULL },
    { "-title", "titleInWindow", XrmoptionNoArg, "True" },
    { "-xtitle", "titleInWindow", XrmoptionNoArg, "False" },
#ifdef ZIPPY
    { "-zippyTalk", "zippyTalk", XrmoptionSepArg, NULL },
    { "-zt", "zippyTalk", XrmoptionNoArg, "True" },
    { "-xzt", "zippyTalk", XrmoptionNoArg, "False" },
    { "-zippyPlay", "zippyPlay", XrmoptionSepArg, NULL },
    { "-zp", "zippyPlay", XrmoptionNoArg, "True" },
    { "-xzp", "zippyPlay", XrmoptionNoArg, "False" },
    { "-zippyLines", "zippyLines", XrmoptionSepArg, NULL },
    { "-zippyPinhead", "zippyPinhead", XrmoptionSepArg, NULL },
    { "-zippyPassword", "zippyPassword", XrmoptionSepArg, NULL },
    { "-zippyPassword2", "zippyPassword2", XrmoptionSepArg, NULL },
    { "-zippyWrongPassword", "zippyWrongPassword", XrmoptionSepArg, NULL },
    { "-zippyAcceptOnly", "zippyAcceptOnly", XrmoptionSepArg, NULL },
    { "-zippyUseI", "zippyUseI", XrmoptionSepArg, NULL },
    { "-zui", "zippyUseI", XrmoptionNoArg, "True" },
    { "-xzui", "zippyUseI", XrmoptionNoArg, "False" },
    { "-zippyBughouse", "zippyBughouse", XrmoptionSepArg, NULL },
    { "-zippyNoplayCrafty", "zippyNoplayCrafty", XrmoptionSepArg, NULL },
    { "-znc", "zippyNoplayCrafty", XrmoptionNoArg, "True" },
    { "-xznc", "zippyNoplayCrafty", XrmoptionNoArg, "False" },
    { "-zippyGameEnd", "zippyGameEnd", XrmoptionSepArg, NULL },
    { "-zippyGameStart", "zippyGameStart", XrmoptionSepArg, NULL },
    { "-zippyAdjourn", "zippyAdjourn", XrmoptionSepArg, NULL },
    { "-zadj", "zippyAdjourn", XrmoptionNoArg, "True" },
    { "-xzadj", "zippyAdjourn", XrmoptionNoArg, "False" },
    { "-zippyAbort", "zippyAbort", XrmoptionSepArg, NULL },
    { "-zab", "zippyAbort", XrmoptionNoArg, "True" },
    { "-xzab", "zippyAbort", XrmoptionNoArg, "False" },
    { "-zippyVariants", "zippyVariants", XrmoptionSepArg, NULL },
    { "-zippyMaxGames", "zippyMaxGames", XrmoptionSepArg, NULL },
    { "-zippyReplayTimeout", "zippyReplayTimeout", XrmoptionSepArg, NULL },
#endif
    { "-flashCount", "flashCount", XrmoptionSepArg, NULL },
    { "-flash", "flashCount", XrmoptionNoArg, "3" },
    { "-xflash", "flashCount", XrmoptionNoArg, "0" },
    { "-flashRate", "flashRate", XrmoptionSepArg, NULL },
    { "-pixmapDirectory", "pixmapDirectory", XrmoptionSepArg, NULL },
    { "-msLoginDelay", "msLoginDelay", XrmoptionSepArg, NULL },
    { "-pixmap", "pixmapDirectory", XrmoptionSepArg, NULL },
    { "-colorizeMessages", "colorizeMessages", XrmoptionSepArg, NULL },
    { "-colorize", "colorizeMessages", XrmoptionNoArg, "True" },
    { "-xcolorize", "colorizeMessages", XrmoptionNoArg, "False" },
    { "-colorShout", "colorShout", XrmoptionSepArg, NULL },
    { "-colorSShout", "colorSShout", XrmoptionSepArg, NULL },
    { "-colorCShout", "colorSShout", XrmoptionSepArg, NULL }, /*FICS name*/
    { "-colorChannel1", "colorChannel1", XrmoptionSepArg, NULL },
    { "-colorChannel", "colorChannel", XrmoptionSepArg, NULL },
    { "-colorKibitz", "colorKibitz", XrmoptionSepArg, NULL },
    { "-colorTell", "colorTell", XrmoptionSepArg, NULL },
    { "-colorChallenge", "colorChallenge", XrmoptionSepArg, NULL },
    { "-colorRequest", "colorRequest", XrmoptionSepArg, NULL },
    { "-colorSeek", "colorSeek", XrmoptionSepArg, NULL },
    { "-colorNormal", "colorNormal", XrmoptionSepArg, NULL },
    { "-soundProgram", "soundProgram", XrmoptionSepArg, NULL },
    { "-soundShout", "soundShout", XrmoptionSepArg, NULL },
    { "-soundSShout", "soundSShout", XrmoptionSepArg, NULL },
    { "-soundCShout", "soundSShout", XrmoptionSepArg, NULL }, /*FICS name*/
    { "-soundChannel1", "soundChannel1", XrmoptionSepArg, NULL },
    { "-soundChannel", "soundChannel", XrmoptionSepArg, NULL },
    { "-soundKibitz", "soundKibitz", XrmoptionSepArg, NULL },
    { "-soundTell", "soundTell", XrmoptionSepArg, NULL },
    { "-soundChallenge", "soundChallenge", XrmoptionSepArg, NULL },
    { "-soundRequest", "soundRequest", XrmoptionSepArg, NULL },
    { "-soundSeek", "soundSeek", XrmoptionSepArg, NULL },
    { "-soundMove", "soundMove", XrmoptionSepArg, NULL },
    { "-soundIcsWin", "soundIcsWin", XrmoptionSepArg, NULL },
    { "-soundIcsLoss", "soundIcsLoss", XrmoptionSepArg, NULL },
    { "-soundIcsDraw", "soundIcsDraw", XrmoptionSepArg, NULL },
    { "-soundIcsUnfinished", "soundIcsUnfinished", XrmoptionSepArg, NULL },
    { "-soundIcsAlarm", "soundIcsAlarm", XrmoptionSepArg, NULL },
    { "-reuseFirst", "reuseFirst", XrmoptionSepArg, NULL },
    { "-reuseChessPrograms", "reuseFirst", XrmoptionSepArg, NULL }, /*compat*/
    { "-reuse", "reuseFirst", XrmoptionNoArg, "True" },
    { "-xreuse", "reuseFirst", XrmoptionNoArg, "False" },
    { "-reuseSecond", "reuseSecond", XrmoptionSepArg, NULL },
    { "-reuse2", "reuseSecond", XrmoptionNoArg, "True" },
    { "-xreuse2", "reuseSecond", XrmoptionNoArg, "False" },
    { "-animateMoving", "animateMoving", XrmoptionSepArg, NULL },
    { "-animate", "animateMoving", XrmoptionNoArg, "True" },
    { "-xanimate", "animateMoving", XrmoptionNoArg, "False" },
    { "-animateDragging", "animateDragging", XrmoptionSepArg, NULL },
    { "-drag", "animateDragging", XrmoptionNoArg, "True" },
    { "-xdrag", "animateDragging", XrmoptionNoArg, "False" },
    { "-animateSpeed", "animateSpeed", XrmoptionSepArg, NULL },
    { "-popupExitMessage", "popupExitMessage", XrmoptionSepArg, NULL },
    { "-exit", "popupExitMessage", XrmoptionNoArg, "True" },
    { "-xexit", "popupExitMessage", XrmoptionNoArg, "False" },
    { "-popupMoveErrors", "popupMoveErrors", XrmoptionSepArg, NULL },
    { "-popup", "popupMoveErrors", XrmoptionNoArg, "True" },
    { "-xpopup", "popupMoveErrors", XrmoptionNoArg, "False" },
    { "-fontSizeTolerance", "fontSizeTolerance", XrmoptionSepArg, NULL },
    { "-initialMode", "initialMode", XrmoptionSepArg, NULL },
    { "-mode", "initialMode", XrmoptionSepArg, NULL },
    { "-variant", "variant", XrmoptionSepArg, NULL },
    { "-firstProtocolVersion", "firstProtocolVersion", XrmoptionSepArg, NULL },
    { "-secondProtocolVersion","secondProtocolVersion",XrmoptionSepArg, NULL },
    { "-showButtonBar", "showButtonBar", XrmoptionSepArg, NULL },
    { "-buttons", "showButtonBar", XrmoptionNoArg, "True" },
    { "-xbuttons", "showButtonBar", XrmoptionNoArg, "False" },
};


XtActionsRec boardActions[] = {
    { "DrawPosition", DrawPositionProc },
    { "HandleUserMove", HandleUserMove },
    { "AnimateUserMove", AnimateUserMove },
    { "FileNameAction", FileNameAction },
    { "AskQuestionProc", AskQuestionProc },
    { "AskQuestionReplyAction", AskQuestionReplyAction },
    { "PieceMenuPopup", PieceMenuPopup },
    { "WhiteClock", WhiteClock },
    { "BlackClock", BlackClock },
    { "Iconify", Iconify },
    { "ResetProc", ResetProc },
    { "LoadGameProc", LoadGameProc },
    { "LoadNextGameProc", LoadNextGameProc },
    { "LoadPrevGameProc", LoadPrevGameProc },
    { "LoadSelectedProc", LoadSelectedProc },
    { "ReloadGameProc", ReloadGameProc },
    { "LoadPositionProc", LoadPositionProc },
    { "LoadNextPositionProc", LoadNextPositionProc },
    { "LoadPrevPositionProc", LoadPrevPositionProc },
    { "ReloadPositionProc", ReloadPositionProc },
    { "CopyPositionProc", CopyPositionProc },
    { "PastePositionProc", PastePositionProc },
    { "CopyGameProc", CopyGameProc },
    { "PasteGameProc", PasteGameProc },
    { "SaveGameProc", SaveGameProc },
    { "SavePositionProc", SavePositionProc },
    { "MailMoveProc", MailMoveProc },
    { "ReloadCmailMsgProc", ReloadCmailMsgProc },
    { "QuitProc", QuitProc },
    { "MachineWhiteProc", MachineWhiteProc },
    { "MachineBlackProc", MachineBlackProc },
    { "AnalysisModeProc", AnalyzeModeProc },
    { "AnalyzeFileProc", AnalyzeFileProc },
    { "TwoMachinesProc", TwoMachinesProc },
    { "IcsClientProc", IcsClientProc },
    { "EditGameProc", EditGameProc },
    { "EditPositionProc", EditPositionProc },
    { "TrainingProc", EditPositionProc },
    { "ShowGameListProc", ShowGameListProc },
    { "ShowMoveListProc", HistoryShowProc},
    { "EditTagsProc", EditCommentProc },
    { "EditCommentProc", EditCommentProc },
    { "IcsAlarmProc", IcsAlarmProc },
    { "IcsInputBoxProc", IcsInputBoxProc },
    { "PauseProc", PauseProc },
    { "AcceptProc", AcceptProc },
    { "DeclineProc", DeclineProc },
    { "RematchProc", RematchProc },
    { "CallFlagProc", CallFlagProc },
    { "DrawProc", DrawProc },
    { "AdjournProc", AdjournProc },
    { "AbortProc", AbortProc },
    { "ResignProc", ResignProc },
    { "EnterKeyProc", EnterKeyProc },
    { "StopObservingProc", StopObservingProc },
    { "StopExaminingProc", StopExaminingProc },
    { "BackwardProc", BackwardProc },
    { "ForwardProc", ForwardProc },
    { "ToStartProc", ToStartProc },
    { "ToEndProc", ToEndProc },
    { "RevertProc", RevertProc },
    { "TruncateGameProc", TruncateGameProc },
    { "MoveNowProc", MoveNowProc },
    { "RetractMoveProc", RetractMoveProc },
    { "AlwaysQueenProc", AlwaysQueenProc },
    { "AnimateDraggingProc", AnimateDraggingProc },
    { "AnimateMovingProc", AnimateMovingProc },
    { "AutoflagProc", AutoflagProc },
    { "AutoflipProc", AutoflipProc },
    { "AutobsProc", AutobsProc },
    { "AutoraiseProc", AutoraiseProc },
    { "AutosaveProc", AutosaveProc },
    { "BlindfoldProc", BlindfoldProc },
    { "FlashMovesProc", FlashMovesProc },
    { "FlipViewProc", FlipViewProc },
    { "GetMoveListProc", GetMoveListProc },
#if HIGHDRAG
    { "HighlightDraggingProc", HighlightDraggingProc },
#endif
    { "HighlightLastMoveProc", HighlightLastMoveProc },
    { "IcsAlarmProc", IcsAlarmProc },
    { "MoveSoundProc", MoveSoundProc },
    { "OldSaveStyleProc", OldSaveStyleProc },
    { "PeriodicUpdatesProc", PeriodicUpdatesProc },   
    { "PonderNextMoveProc", PonderNextMoveProc },
    { "PopupExitMessageProc", PopupExitMessageProc }, 
    { "PopupMoveErrorsProc", PopupMoveErrorsProc },   
    { "PremoveProc", PremoveProc },
    { "QuietPlayProc", QuietPlayProc },
    { "ShowCoordsProc", ShowCoordsProc },
    { "ShowThinkingProc", ShowThinkingProc },
    { "TestLegalityProc", TestLegalityProc },
    { "InfoProc", InfoProc },
    { "ManProc", ManProc },
    { "HintProc", HintProc },
    { "BookProc", BookProc },
    { "AboutGameProc", AboutGameProc },
    { "AboutProc", AboutProc },
    { "DebugProc", DebugProc },
    { "NothingProc", NothingProc },
    { "CommentPopDown", (XtActionProc) CommentPopDown },
    { "EditCommentPopDown", (XtActionProc) EditCommentPopDown },
    { "TagsPopDown", (XtActionProc) TagsPopDown },
    { "ErrorPopDown", (XtActionProc) ErrorPopDown },
    { "ICSInputBoxPopDown", (XtActionProc) ICSInputBoxPopDown },
    { "AnalysisPopDown", (XtActionProc) AnalysisPopDown },
    { "FileNamePopDown", (XtActionProc) FileNamePopDown },
    { "AskQuestionPopDown", (XtActionProc) AskQuestionPopDown },
    { "GameListPopDown", (XtActionProc) GameListPopDown },
    { "PromotionPopDown", (XtActionProc) PromotionPopDown },
    { "HistoryPopDown", (XtActionProc) HistoryPopDown },
};
     
char globalTranslations[] =
  ":<Key>R: ResignProc() \n \
   :<Key>r: ResetProc() \n \
   :<Key>g: LoadGameProc() \n \
   :<Key>N: LoadNextGameProc() \n \
   :<Key>P: LoadPrevGameProc() \n \
   :<Key>Q: QuitProc() \n \
   :<Key>F: ToEndProc() \n \
   :<Key>f: ForwardProc() \n \
   :<Key>B: ToStartProc() \n \
   :<Key>b: BackwardProc() \n \
   :<Key>p: PauseProc() \n \
   :<Key>d: DrawProc() \n \
   :<Key>t: CallFlagProc() \n \
   :<Key>i: Iconify() \n \
   :<Key>c: Iconify() \n \
   :<Key>v: FlipViewProc() \n \
   <KeyDown>Control_L: BackwardProc() \n \
   <KeyUp>Control_L: ForwardProc() \n \
   <KeyDown>Control_R: BackwardProc() \n \
   <KeyUp>Control_R: ForwardProc() \n \
   Shift<Key>1: AskQuestionProc(\"Direct command\",\
                                \"Send to chess program:\",,1) \n \
   Shift<Key>2: AskQuestionProc(\"Direct command\",\
                                \"Send to second chess program:\",,2) \n";

char boardTranslations[] =
   "<Btn1Down>: HandleUserMove() \n \
   <Btn1Up>: HandleUserMove() \n \
   <Btn1Motion>: AnimateUserMove() \n \
   Shift<Btn2Down>: XawPositionSimpleMenu(menuB) XawPositionSimpleMenu(menuD)\
                 PieceMenuPopup(menuB) \n \
   Any<Btn2Down>: XawPositionSimpleMenu(menuW) XawPositionSimpleMenu(menuD) \
                 PieceMenuPopup(menuW) \n \
   Shift<Btn3Down>: XawPositionSimpleMenu(menuW) XawPositionSimpleMenu(menuD)\
                 PieceMenuPopup(menuW) \n \
   Any<Btn3Down>: XawPositionSimpleMenu(menuB) XawPositionSimpleMenu(menuD) \
                 PieceMenuPopup(menuB) \n";
     
char whiteTranslations[] = "<BtnDown>: WhiteClock()\n";
char blackTranslations[] = "<BtnDown>: BlackClock()\n";
     
char ICSInputTranslations[] =
    "<Key>Return: EnterKeyProc() \n";

String xboardResources[] = {
    "*fileName*value.translations: #override\\n <Key>Return: FileNameAction()",
    "*question*value.translations: #override\\n <Key>Return: AskQuestionReplyAction()",
    "*errorpopup*translations: #override\\n <Key>Return: ErrorPopDown()",
    NULL
  };
     

/* Max possible square size */
#define MAXSQSIZE 256

static int xpm_avail[MAXSQSIZE];

#ifdef HAVE_DIR_STRUCT

/* Extract piece size from filename */
static int
xpm_getsize(name, len, ext)
     char *name;
     int len;
     char *ext;
{
    char *p, *d;
    char buf[10];
  
    if (len < 4)
      return 0;

    if ((p=strchr(name, '.')) == NULL ||
      StrCaseCmp(p+1, ext) != 0)
      return 0;
  
    p = name + 3;
    d = buf;

    while (*p && isdigit(*p))
      *(d++) = *(p++);

    *d = 0;
    return atoi(buf);
}

/* Setup xpm_avail */
static int
xpm_getavail(dirname, ext)
     char *dirname;
     char *ext;
{
    DIR *dir;
    struct dirent *ent;
    int  i;

    for (i=0; i<MAXSQSIZE; ++i)
      xpm_avail[i] = 0;

    if (appData.debugMode)
      fprintf(stderr, "XPM dir:%s:ext:%s:\n", dirname, ext);
  
    dir = opendir(dirname);
    if (!dir)
      {
        fprintf(stderr, "%s: Can't access XPM directory %s\n", 
              programName, dirname);
        exit(1);
      }
  
    while ((ent=readdir(dir)) != NULL) {
      i = xpm_getsize(ent->d_name, NAMLEN(ent), ext);
      if (i > 0 && i < MAXSQSIZE)
        xpm_avail[i] = 1;
    }

    closedir(dir);

    return 0;
}

void
xpm_print_avail(fp, ext)
     FILE *fp;
     char *ext;
{
    int i;

    fprintf(fp, "Available `%s' sizes:\n", ext);
    for (i=1; i<MAXSQSIZE; ++i) {
      if (xpm_avail[i])
        printf("%d\n", i);
    }
}

/* Return XPM piecesize closest to size */
int
xpm_closest_to(dirname, size, ext)
     char *dirname;
     int size;
     char *ext;
{
    int i;
    int sm_diff = MAXSQSIZE;
    int sm_index = 0;
    int diff;
  
    xpm_getavail(dirname, ext);

    if (appData.debugMode)
      xpm_print_avail(stderr, ext);
  
    for (i=1; i<MAXSQSIZE; ++i) {
      if (xpm_avail[i]) {
          diff = size - i;
          diff = (diff<0) ? -diff : diff;
          if (diff < sm_diff) {
            sm_diff = diff;
            sm_index = i;
          }
      }
    }

    if (!sm_index) {
      fprintf(stderr, "Error: No `%s' files!\n", ext);
      exit(1);
    }

    return sm_index;
}
#else /* !HAVE_DIR_STRUCT */
/* If we are on a system without a DIR struct, we can't
   read the directory, so we can't collect a list of
   filenames, etc., so we can't do any size-fitting. */
int
xpm_closest_to(dirname, size, ext)
     char *dirname;
     int size;
     char *ext;
{
    fprintf(stderr, "Warning: No DIR structure found on this system --\n");
    fprintf(stderr, "         Unable to autosize for XPM/XIM pieces.\n");
    fprintf(stderr, "   Please report this error to frankm@hiwaay.net.\n");
    fprintf(stderr, "   Include system type & operating system in message.\n");
    return size;
}
#endif /* HAVE_DIR_STRUCT */

static char *cnames[9] = { "black", "red", "green", "yellow", "blue",
                       "magenta", "cyan", "white" };
typedef struct {
    int attr, bg, fg;
} TextColors;
TextColors textColors[(int)NColorClasses];

/* String is: "fg, bg, attr". Which is 0, 1, 2 */
static int
parse_color(str, which)
     char *str;
     int which;
{
    char *p, buf[100], *d;
    int i;
  
    if (strlen(str) > 99)     /* watch bounds on buf */
      return -1;

    p = str;
    d = buf;
    for (i=0; i<which; ++i) {
      p = strchr(p, ',');
      if (!p)
        return -1;
      ++p;
    }

    /* Could be looking at something like:
       black, , 1
       .. in which case we want to stop on a comma also */
    while (*p && *p != ',' && !isalpha(*p) && !isdigit(*p))
      ++p;

    if (*p == ',') {
      return -1;        /* Use default for empty field */
    }
    
    if (which == 2 || isdigit(*p))
      return atoi(p);
 
    while (*p && isalpha(*p))
      *(d++) = *(p++);

    *d = 0;

    for (i=0; i<8; ++i) {
      if (!StrCaseCmp(buf, cnames[i]))
        return which? (i+40) : (i+30);
    }
    if (!StrCaseCmp(buf, "default")) return -1;

    fprintf(stderr, "%s: unrecognized color %s\n", programName, buf);
    return -2;
}

static int
parse_cpair(cc, str)
     ColorClass cc;
     char *str;
{
    if ((textColors[(int)cc].fg=parse_color(str, 0)) == -2) {
      fprintf(stderr, "%s: can't parse foreground color in `%s'\n",
            programName, str);
      return -1;
    }

    /* bg and attr are optional */
    textColors[(int)cc].bg = parse_color(str, 1);
    if ((textColors[(int)cc].attr = parse_color(str, 2)) < 0) {
      textColors[(int)cc].attr = 0;
    }
    return 0;
}


/* Arrange to catch delete-window events */
Atom wm_delete_window;
void
CatchDeleteWindow(Widget w, String procname)
{
  char buf[MSG_SIZ];
  XSetWMProtocols(xDisplay, XtWindow(w), &wm_delete_window, 1);
  sprintf(buf, "<Message>WM_PROTOCOLS: %s() \n", procname);
  XtAugmentTranslations(w, XtParseTranslationTable(buf));
}

void
BoardToTop()
{
  Arg args[16];
  XtSetArg(args[0], XtNiconic, False);
  XtSetValues(shellWidget, args, 1);

  XtPopup(shellWidget, XtGrabNone); /* Raise if lowered  */
}

int
main(argc, argv)
     int argc;
     char **argv;
{
    int i, j, clockFontPxlSize, coordFontPxlSize, fontPxlSize;
    XSetWindowAttributes window_attributes;
    Arg args[16];
    Dimension timerWidth, boardWidth, w, h, sep, bor, wr, hr;
    XrmValue vFrom, vTo;
    XtGeometryResult gres;
    char *p;
    XrmDatabase xdb;
    int forceMono = False;

    setbuf(stdout, NULL);
    setbuf(stderr, NULL);
    debugFP = stderr;
    
    programName = strrchr(argv[0], '/');
    if (programName == NULL)
      programName = argv[0];
    else
      programName++;

    shellWidget =
      XtAppInitialize(&appContext, "XBoard", shellOptions,
                  XtNumber(shellOptions),
                  &argc, argv, xboardResources, NULL, 0);
    if (argc > 1) {
      fprintf(stderr, "%s: unrecognized argument %s\n",
            programName, argv[1]);
      exit(2);
    }
    
    if ((chessDir = (char *) getenv("CHESSDIR")) == NULL) {
      chessDir = ".";
    } else {
      if (chdir(chessDir) != 0) {
          fprintf(stderr, "%s: can't cd to CHESSDIR: ", programName);
          perror(chessDir);
          exit(1);
      }
    }
    
    p = getenv("HOME");
    if (p == NULL) p = "/tmp";
    i = strlen(p) + strlen("/.xboardXXXXXx.pgn") + 1;
    gameCopyFilename = (char*) malloc(i);
    gamePasteFilename = (char*) malloc(i);
    sprintf(gameCopyFilename, "%s/.xboard%05uc.pgn", p, getpid());
    sprintf(gamePasteFilename, "%s/.xboard%05up.pgn", p, getpid());

    XtGetApplicationResources(shellWidget, (XtPointer) &appData,
                        clientResources, XtNumber(clientResources),
                        NULL, 0);
#if !HIGHDRAG
    /* This feature does not work; animation needs a rewrite */
    appData.highlightDragging = FALSE;
#endif
    InitBackEnd1();

    xDisplay = XtDisplay(shellWidget);
    xScreen = DefaultScreen(xDisplay);
    wm_delete_window = XInternAtom(xDisplay, "WM_DELETE_WINDOW", True);

    /*
     * Determine boardSize
     */
    if (isdigit(appData.boardSize[0])) {
        i = sscanf(appData.boardSize, "%d,%d,%d,%d,%d,%d,%d", &squareSize,
               &lineGap, &clockFontPxlSize, &coordFontPxlSize,
               &fontPxlSize, &smallLayout, &tinyLayout);
        if (i == 0) {
          fprintf(stderr, "%s: bad boardSize syntax %s\n",
                programName, appData.boardSize);
          exit(2);
      }
      if (i < 7) {
          /* Find some defaults; use the nearest known size */
          SizeDefaults *szd, *nearest;
          int distance = 99999;
          nearest = szd = sizeDefaults;
          while (szd->name != NULL) {
            if (abs(szd->squareSize - squareSize) < distance) {
                nearest = szd;
                distance = abs(szd->squareSize - squareSize);
                if (distance == 0) break;
            }
            szd++;
          }
          if (i < 2) lineGap = nearest->lineGap;
          if (i < 3) clockFontPxlSize = nearest->clockFontPxlSize;
          if (i < 4) coordFontPxlSize = nearest->coordFontPxlSize;
          if (i < 5) fontPxlSize = nearest->fontPxlSize;
          if (i < 6) smallLayout = nearest->smallLayout;
          if (i < 7) tinyLayout = nearest->tinyLayout;
      }
    } else {
        SizeDefaults *szd = sizeDefaults;
        if (*appData.boardSize == NULLCHAR) {
          while (DisplayWidth(xDisplay, xScreen) < szd->minScreenSize ||
               DisplayHeight(xDisplay, xScreen) < szd->minScreenSize) {
            szd++;
          }
          if (szd->name == NULL) szd--;
      } else {
          while (szd->name != NULL &&
               StrCaseCmp(szd->name, appData.boardSize) != 0) szd++;
          if (szd->name == NULL) {
            fprintf(stderr, "%s: unrecognized boardSize name %s\n",
                  programName, appData.boardSize);
            exit(2);
          }
      }
      squareSize = szd->squareSize;
      lineGap = szd->lineGap;
      clockFontPxlSize = szd->clockFontPxlSize;
      coordFontPxlSize = szd->coordFontPxlSize;
      fontPxlSize = szd->fontPxlSize;
      smallLayout = szd->smallLayout;
      tinyLayout = szd->tinyLayout;
    }

    /* Now, using squareSize as a hint, find a good XPM/XIM set size */
    if (strlen(appData.pixmapDirectory) > 0) {
      p = ExpandPathName(appData.pixmapDirectory);
      if (!p) {
          fprintf(stderr, "Error expanding path name \"%s\"\n",
               appData.pixmapDirectory);
          exit(1);
      }
      if (appData.debugMode) {
          fprintf(stderr, "XBoard square size (hint): %d\n", squareSize);
          fprintf(stderr, "%s fulldir:%s:\n", IMAGE_EXT, p);
      }
      squareSize = xpm_closest_to(p, squareSize, IMAGE_EXT);
      if (appData.debugMode) {
          fprintf(stderr, "Closest %s size: %d\n", IMAGE_EXT, squareSize);
      }
    }
            
    boardWidth = lineGap + BOARD_SIZE * (squareSize + lineGap);
    if (appData.showJail == 1) {
      /* Jail on top and bottom */
      XtSetArg(boardArgs[1], XtNwidth, boardWidth);
      XtSetArg(boardArgs[2], XtNheight,
             boardWidth + 2*(lineGap + squareSize));
    } else if (appData.showJail == 2) {
      /* Jail on sides */
      XtSetArg(boardArgs[1], XtNwidth,
             boardWidth + 2*(lineGap + squareSize));
      XtSetArg(boardArgs[2], XtNheight, boardWidth);
    } else {
      /* No jail */
      XtSetArg(boardArgs[1], XtNwidth, boardWidth);
      XtSetArg(boardArgs[2], XtNheight, boardWidth);
    }

    /*
     * Determine what fonts to use.
     */
    appData.clockFont = FindFont(appData.clockFont, clockFontPxlSize);
    clockFontID = XLoadFont(xDisplay, appData.clockFont);
    clockFontStruct = XQueryFont(xDisplay, clockFontID);
    appData.coordFont = FindFont(appData.coordFont, coordFontPxlSize);
    coordFontID = XLoadFont(xDisplay, appData.coordFont);
    coordFontStruct = XQueryFont(xDisplay, coordFontID);
    appData.font = FindFont(appData.font, fontPxlSize);

    xdb = XtDatabase(xDisplay);
    XrmPutStringResource(&xdb, "*font", appData.font);

    /*
     * Detect if there are not enough colors available and adapt.
     */
    if (DefaultDepth(xDisplay, xScreen) <= 2) {
      appData.monoMode = True;
    }

    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.lightSquareColor;
      vFrom.size = strlen(appData.lightSquareColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        lightSquareColor = *(Pixel *) vTo.addr;
      }
    }
    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.darkSquareColor;
      vFrom.size = strlen(appData.darkSquareColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        darkSquareColor = *(Pixel *) vTo.addr;
      }
    }
    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.whitePieceColor;
      vFrom.size = strlen(appData.whitePieceColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        whitePieceColor = *(Pixel *) vTo.addr;
      }
    }
    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.blackPieceColor;
      vFrom.size = strlen(appData.blackPieceColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        blackPieceColor = *(Pixel *) vTo.addr;
      }
    }

    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.highlightSquareColor;
      vFrom.size = strlen(appData.highlightSquareColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        highlightSquareColor = *(Pixel *) vTo.addr;
      }
    }

    if (!appData.monoMode) {
      vFrom.addr = (caddr_t) appData.premoveHighlightColor;
      vFrom.size = strlen(appData.premoveHighlightColor);
      XtConvert(shellWidget, XtRString, &vFrom, XtRPixel, &vTo);
      if (vTo.addr == NULL) {
        appData.monoMode = True;
        forceMono = True;
      } else {
        premoveHighlightColor = *(Pixel *) vTo.addr;
      }
    }

    if (forceMono) {
      fprintf(stderr, "%s: too few colors available; trying monochrome mode\n",
            programName);
    }

    if (appData.monoMode && appData.debugMode) {
      fprintf(stderr, "white pixel = 0x%lx, black pixel = 0x%lx\n",
            (unsigned long) XWhitePixel(xDisplay, xScreen),
            (unsigned long) XBlackPixel(xDisplay, xScreen));
    }
    
    if (parse_cpair(ColorShout, appData.colorShout) < 0 ||
      parse_cpair(ColorSShout, appData.colorSShout) < 0 ||
      parse_cpair(ColorChannel1, appData.colorChannel1) < 0  ||
      parse_cpair(ColorChannel, appData.colorChannel) < 0  ||
      parse_cpair(ColorKibitz, appData.colorKibitz) < 0 ||
      parse_cpair(ColorTell, appData.colorTell) < 0 ||
      parse_cpair(ColorChallenge, appData.colorChallenge) < 0  ||
      parse_cpair(ColorRequest, appData.colorRequest) < 0  ||
      parse_cpair(ColorSeek, appData.colorSeek) < 0  ||
      parse_cpair(ColorNormal, appData.colorNormal) < 0)
      {
        if (appData.colorize) {
            fprintf(stderr,
                  "%s: can't parse color names; disabling colorization\n",
                  programName);
        }
        appData.colorize = FALSE;
      }
    textColors[ColorNone].fg = textColors[ColorNone].bg = -1;
    textColors[ColorNone].attr = 0;
    
    XtAppAddActions(appContext, boardActions, XtNumber(boardActions));
    
    /*
     * widget hierarchy
     */
    if (tinyLayout) {
      layoutName = "tinyLayout";
    } else if (smallLayout) {
      layoutName = "smallLayout";
    } else {
      layoutName = "normalLayout";
    }
    /* Outer layoutWidget is there only to provide a name for use in
       resources that depend on the layout style */
    layoutWidget =
      XtCreateManagedWidget(layoutName, formWidgetClass, shellWidget,
                      layoutArgs, XtNumber(layoutArgs));
    formWidget =
      XtCreateManagedWidget("form", formWidgetClass, layoutWidget,
                      formArgs, XtNumber(formArgs));
    XtSetArg(args[0], XtNdefaultDistance, &sep);
    XtGetValues(formWidget, args, 1);
    
    j = 0;
    widgetList[j++] = menuBarWidget = CreateMenuBar(menuBar);

    widgetList[j++] = whiteTimerWidget =
      XtCreateWidget("whiteTime", labelWidgetClass,
                 formWidget, timerArgs, XtNumber(timerArgs));
    XtSetArg(args[0], XtNfont, clockFontStruct);
    XtSetValues(whiteTimerWidget, args, 1);
    
    widgetList[j++] = blackTimerWidget =
      XtCreateWidget("blackTime", labelWidgetClass,
                 formWidget, timerArgs, XtNumber(timerArgs));
    XtSetArg(args[0], XtNfont, clockFontStruct);
    XtSetValues(blackTimerWidget, args, 1);
    
    if (appData.titleInWindow) {
      widgetList[j++] = titleWidget = 
        XtCreateWidget("title", labelWidgetClass, formWidget,
                   titleArgs, XtNumber(titleArgs));
    }

    if (appData.showButtonBar) {
      widgetList[j++] = buttonBarWidget = CreateButtonBar(buttonBar);
    }

    widgetList[j++] = messageWidget =
      XtCreateWidget("message", labelWidgetClass, formWidget,
                 messageArgs, XtNumber(messageArgs));
    
    widgetList[j++] = boardWidget =
      XtCreateWidget("board", widgetClass, formWidget, boardArgs,
                 XtNumber(boardArgs));

    XtManageChildren(widgetList, j);
    
    timerWidth = (boardWidth - sep) / 2;
    XtSetArg(args[0], XtNwidth, timerWidth);
    XtSetValues(whiteTimerWidget, args, 1);
    XtSetValues(blackTimerWidget, args, 1);
    
    XtSetArg(args[0], XtNbackground, &timerBackgroundPixel);
    XtSetArg(args[1], XtNforeground, &timerForegroundPixel);
    XtGetValues(whiteTimerWidget, args, 2);
    
    if (appData.showButtonBar) {
      XtSetArg(args[0], XtNbackground, &buttonBackgroundPixel);
      XtSetArg(args[1], XtNforeground, &buttonForegroundPixel);
      XtGetValues(XtNameToWidget(buttonBarWidget, PAUSE_BUTTON), args, 2);
    }

    /*
     * formWidget uses these constraints but they are stored
     * in the children.
     */
    i = 0;
    XtSetArg(args[i], XtNfromHoriz, 0); i++;
    XtSetValues(menuBarWidget, args, i);
    if (appData.titleInWindow) {
      if (smallLayout) {
          i = 0;
          XtSetArg(args[i], XtNfromVert, menuBarWidget); i++;
          XtSetValues(whiteTimerWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromVert, menuBarWidget); i++;
          XtSetArg(args[i], XtNfromHoriz, whiteTimerWidget); i++;
          XtSetValues(blackTimerWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromVert, whiteTimerWidget); i++;
            XtSetArg(args[i], XtNjustify, XtJustifyLeft); i++;
          XtSetValues(titleWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromVert, titleWidget); i++;
          XtSetArg(args[i], XtNresizable, (XtArgVal) True); i++;
          XtSetValues(messageWidget, args, i);
          if (appData.showButtonBar) {
            i = 0;
            XtSetArg(args[i], XtNfromVert, titleWidget); i++;
            XtSetArg(args[i], XtNfromHoriz, messageWidget); i++;
            XtSetValues(buttonBarWidget, args, i);
          }
      } else {
          i = 0;
          XtSetArg(args[i], XtNfromVert, titleWidget); i++;
          XtSetValues(whiteTimerWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromVert, titleWidget); i++;
          XtSetArg(args[i], XtNfromHoriz, whiteTimerWidget); i++;
          XtSetValues(blackTimerWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromHoriz, menuBarWidget); i++;
          XtSetValues(titleWidget, args, i);
          i = 0;
          XtSetArg(args[i], XtNfromVert, whiteTimerWidget); i++;
          XtSetArg(args[i], XtNresizable, (XtArgVal) True); i++;
          XtSetValues(messageWidget, args, i);
          if (appData.showButtonBar) {
            i = 0;
            XtSetArg(args[i], XtNfromVert, whiteTimerWidget); i++;
            XtSetArg(args[i], XtNfromHoriz, messageWidget); i++;
            XtSetValues(buttonBarWidget, args, i);
          }
      }
    } else {
      i = 0;
      XtSetArg(args[i], XtNfromVert, menuBarWidget); i++;
      XtSetValues(whiteTimerWidget, args, i);
      i = 0;
      XtSetArg(args[i], XtNfromVert, menuBarWidget); i++;
      XtSetArg(args[i], XtNfromHoriz, whiteTimerWidget); i++;
      XtSetValues(blackTimerWidget, args, i);
      i = 0;
      XtSetArg(args[i], XtNfromVert, whiteTimerWidget); i++;
      XtSetArg(args[i], XtNresizable, (XtArgVal) True); i++;
      XtSetValues(messageWidget, args, i);
      if (appData.showButtonBar) {
        i = 0;
        XtSetArg(args[i], XtNfromVert, whiteTimerWidget); i++;
        XtSetArg(args[i], XtNfromHoriz, messageWidget); i++;
        XtSetValues(buttonBarWidget, args, i);
      }
    }
    i = 0;
    XtSetArg(args[0], XtNfromVert, messageWidget);
    XtSetValues(boardWidget, args, 1);

    XtRealizeWidget(shellWidget);

    /*
     * Correct the width of the message and title widgets.
     * It is not known why some systems need the extra fudge term.
     * The value "2" is probably larger than needed.
     */
    XawFormDoLayout(formWidget, False);
#define WIDTH_FUDGE 2
    i = 0;
    XtSetArg(args[i], XtNborderWidth, &bor);  i++;
    XtSetArg(args[i], XtNheight, &h);  i++;
    XtGetValues(messageWidget, args, i);
    if (appData.showButtonBar) {
      i = 0;
      XtSetArg(args[i], XtNwidth, &w);  i++;
      XtGetValues(buttonBarWidget, args, i);
      w = boardWidth - w - sep - 2*bor - WIDTH_FUDGE;
    } else {
      w = boardWidth - 2*bor + 1; /*!! +1 compensates for kludge below */
    }

    gres = XtMakeResizeRequest(messageWidget, w, h, &wr, &hr);
    if (gres != XtGeometryYes && appData.debugMode) {
      fprintf(stderr, "%s: messageWidget geometry error %d %d %d %d %d\n",
            programName, gres, w, h, wr, hr);
    }
    
    /* !! Horrible hack to work around bug in XFree86 4.0.1 (X11R6.4.3) */
    /* The size used for the child widget in layout lags one resize behind
       its true size, so we resize a second time, 1 pixel smaller.  Yeech! */
    w--;
    gres = XtMakeResizeRequest(messageWidget, w, h, &wr, &hr);
    if (gres != XtGeometryYes && appData.debugMode) {
      fprintf(stderr, "%s: messageWidget geometry error %d %d %d %d %d\n",
            programName, gres, w, h, wr, hr);
    }
    /* !! end hack */

    if (appData.titleInWindow) {
      i = 0;
      XtSetArg(args[i], XtNborderWidth, &bor); i++;
      XtSetArg(args[i], XtNheight, &h);  i++;
      XtGetValues(titleWidget, args, i);
      if (smallLayout) {
          w = boardWidth - 2*bor;
      } else {
          XtSetArg(args[0], XtNwidth, &w);
          XtGetValues(menuBarWidget, args, 1);
          w = boardWidth - w - sep - 2*bor - WIDTH_FUDGE;
      }

      gres = XtMakeResizeRequest(titleWidget, w, h, &wr, &hr);
      if (gres != XtGeometryYes && appData.debugMode) {
          fprintf(stderr,
                "%s: titleWidget geometry error %d %d %d %d %d\n",
                programName, gres, w, h, wr, hr);
      }
    }
    XawFormDoLayout(formWidget, True);

    xBoardWindow = XtWindow(boardWidget);
    
    /* 
     * Create X checkmark bitmap and initialize option menu checks.
     */
    ReadBitmap(&xMarkPixmap, "checkmark.bm",
             checkmark_bits, checkmark_width, checkmark_height);
    XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    if (appData.alwaysPromoteToQueen) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Always Queen"),
                args, 1);
    }
    if (appData.animateDragging) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Animate Dragging"),
                args, 1);
    }
    if (appData.animate) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Animate Moving"),
                args, 1);
    }
    if (appData.autoComment) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Comment"),
                args, 1);
    }
    if (appData.autoCallFlag) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Flag"),
                args, 1);
    }
    if (appData.autoFlipView) {
      XtSetValues(XtNameToWidget(menuBarWidget,"menuOptions.Auto Flip View"),
                args, 1);
    }
    if (appData.autoObserve) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Observe"),
                args, 1);
    }
    if (appData.autoRaiseBoard) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Auto Raise Board"), args, 1);
    }
    if (appData.autoSaveGames) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Save"),
                args, 1);
    }
    if (appData.saveGameFile[0] != NULLCHAR) {
      /* Can't turn this off from menu */
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Save"),
                args, 1);
      XtSetSensitive(XtNameToWidget(menuBarWidget, "menuOptions.Auto Save"),
                   False);

    }
    if (appData.blindfold) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Blindfold"), args, 1);
    }
    if (appData.flashCount > 0) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Flash Moves"),
                args, 1);
    }
    if (appData.getMoveList) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Get Move List"),
                args, 1);
    }
#if HIGHDRAG
    if (appData.highlightDragging) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Highlight Dragging"),
                args, 1);
    }
#endif
    if (appData.highlightLastMove) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Highlight Last Move"),
                args, 1);
    }
    if (appData.icsAlarm) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.ICS Alarm"),
                args, 1);
    }
    if (appData.ringBellAfterMoves) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Move Sound"),
                args, 1);
    }
    if (appData.oldSaveStyle) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Old Save Style"), args, 1);
    }
    if (appData.periodicUpdates) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Periodic Updates"), args, 1);
    } 
    if (appData.ponderNextMove) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Ponder Next Move"), args, 1);
    } 
    if (appData.popupExitMessage) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Popup Exit Message"), args, 1);
    } 
    if (appData.popupMoveErrors) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Popup Move Errors"), args, 1);
    } 
    if (appData.premove) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Premove"), args, 1);
    }
    if (appData.quietPlay) {
      XtSetValues(XtNameToWidget(menuBarWidget,
                           "menuOptions.Quiet Play"), args, 1);
    }
    if (appData.showCoords) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Show Coords"),
                args, 1);
    }
    if (appData.showThinking) {
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Show Thinking"),
                args, 1);
    }
    if (appData.testLegality) {
      XtSetValues(XtNameToWidget(menuBarWidget,"menuOptions.Test Legality"),
                args, 1);
    }

    /*
     * Create an icon.
     */
    ReadBitmap(&wIconPixmap, "icon_white.bm",
             icon_white_bits, icon_white_width, icon_white_height);
    ReadBitmap(&bIconPixmap, "icon_black.bm",
             icon_black_bits, icon_black_width, icon_black_height);
    iconPixmap = wIconPixmap;
    i = 0;
    XtSetArg(args[i], XtNiconPixmap, iconPixmap);  i++;
    XtSetValues(shellWidget, args, i);
    
    /*
     * Create a cursor for the board widget.
     */
    window_attributes.cursor = XCreateFontCursor(xDisplay, XC_hand2);
    XChangeWindowAttributes(xDisplay, xBoardWindow,
                      CWCursor, &window_attributes);
    
    /*
     * Inhibit shell resizing.
     */
    shellArgs[0].value = (XtArgVal) &w;
    shellArgs[1].value = (XtArgVal) &h;
    XtGetValues(shellWidget, shellArgs, 2);
    shellArgs[4].value = shellArgs[2].value = w;
    shellArgs[5].value = shellArgs[3].value = h;
    XtSetValues(shellWidget, &shellArgs[2], 4);
    
    CatchDeleteWindow(shellWidget, "QuitProc");

    CreateGCs();
    CreateGrid();
#if HAVE_LIBXPM
    if (appData.bitmapDirectory[0] != NULLCHAR) {
      CreatePieces();
    } else {
      CreateXPMPieces();
    }
#else
    CreateXIMPieces();
    /* Create regular pieces */
    if (!useImages) CreatePieces();
#endif  

    CreatePieceMenus();

    if (appData.animate || appData.animateDragging)
      CreateAnimVars();
    
    XtAugmentTranslations(formWidget,
                    XtParseTranslationTable(globalTranslations));
    XtAugmentTranslations(boardWidget,
                    XtParseTranslationTable(boardTranslations));
    XtAugmentTranslations(whiteTimerWidget,
                    XtParseTranslationTable(whiteTranslations));
    XtAugmentTranslations(blackTimerWidget,
                    XtParseTranslationTable(blackTranslations));

    /* Why is the following needed on some versions of X instead
     * of a translation? */
    XtAddEventHandler(boardWidget, ExposureMask, False,
                  (XtEventHandler) EventProc, NULL);
    /* end why */

    InitBackEnd2();
    
    if (errorExitStatus == -1) {
      if (appData.icsActive) {
          /* We now wait until we see "login:" from the ICS before
             sending the logon script (problems with timestamp otherwise) */
          /*ICSInitScript();*/
          if (appData.icsInputBox) ICSInputBoxPopUp();
      }

      signal(SIGINT, IntSigHandler);
      signal(SIGTERM, IntSigHandler);
      if (*appData.cmailGameName != NULLCHAR) {
          signal(SIGUSR1, CmailSigHandler);
      }
    }

    XtAppMainLoop(appContext);
    return 0;
}

void
ShutDownFrontEnd()
{
    if (appData.icsActive && oldICSInteractionTitle != NULL) {
        DisplayIcsInteractionTitle(oldICSInteractionTitle);
    }
    unlink(gameCopyFilename);
    unlink(gamePasteFilename);
}

RETSIGTYPE
IntSigHandler(sig)
     int sig;
{
    ExitEvent(sig);
}

RETSIGTYPE
CmailSigHandler(sig)
     int sig;
{
    int dummy = 0;
    int error;

    signal(SIGUSR1, SIG_IGN); /* suspend handler     */

    /* Activate call-back function CmailSigHandlerCallBack()             */
    OutputToProcess(cmailPR, (char *)(&dummy), sizeof(int), &error);

    signal(SIGUSR1, CmailSigHandler); /* re-activate handler */
}

void
CmailSigHandlerCallBack(isr, closure, message, count, error)
     InputSourceRef isr;
     VOIDSTAR closure;
     char *message;
     int count;
     int error;
{
    BoardToTop();
    ReloadCmailMsgEvent(TRUE);      /* Reload cmail msg  */
}
/**** end signal code ****/


void
ICSInitScript()
{
    FILE *f;
    char buf[MSG_SIZ];
    char *p;

    f = fopen(appData.icsLogon, "r");
    if (f == NULL) {
      p = getenv("HOME");
      if (p != NULL) {
          strcpy(buf, p);
          strcat(buf, "/");
          strcat(buf, appData.icsLogon);
          f = fopen(buf, "r");
      }
    }
    if (f != NULL)
      ProcessICSInitScript(f);
}

void
ResetFrontEnd()
{
    CommentPopDown();
    EditCommentPopDown();
    TagsPopDown();
    return;
}

typedef struct {
    char *name;
    Boolean value;
} Enables;

void
SetMenuEnables(enab)
     Enables *enab;
{
  Widget w;
  if (!menuBarWidget) return;
  while (enab->name != NULL) {
    w = XtNameToWidget(menuBarWidget, enab->name);
    if (w == NULL) {
      DisplayError(enab->name, 0);
    } else {
      XtSetSensitive(w, enab->value);
    }
    enab++;
  }
}

Enables icsEnables[] = {
    { "menuFile.Mail Move", False },
    { "menuFile.Reload CMail Message", False },
    { "menuMode.Machine Black", False },
    { "menuMode.Machine White", False },
    { "menuMode.Analysis Mode", False },
    { "menuMode.Analyze File", False },
    { "menuMode.Two Machines", False },
#ifndef ZIPPY
    { "menuHelp.Hint", False },
    { "menuHelp.Book", False },
    { "menuStep.Move Now", False },
    { "menuOptions.Periodic Updates", False },  
    { "menuOptions.Show Thinking", False },
    { "menuOptions.Ponder Next Move", False },
#endif
    { NULL, False }
};

Enables ncpEnables[] = {    
    { "menuFile.Mail Move", False },
    { "menuFile.Reload CMail Message", False },
    { "menuMode.Machine White", False },
    { "menuMode.Machine Black", False },
    { "menuMode.Analysis Mode", False },
    { "menuMode.Analyze File", False },
    { "menuMode.Two Machines", False },
    { "menuMode.ICS Client", False },
    { "menuMode.ICS Input Box", False },
    { "Action", False },
    { "menuStep.Revert", False },
    { "menuStep.Move Now", False },
    { "menuStep.Retract Move", False },
    { "menuOptions.Auto Comment", False },
    { "menuOptions.Auto Flag", False },
    { "menuOptions.Auto Flip View", False },
    { "menuOptions.Auto Observe", False },
    { "menuOptions.Auto Raise Board", False },
    { "menuOptions.Get Move List", False },
    { "menuOptions.ICS Alarm", False },
    { "menuOptions.Move Sound", False },
    { "menuOptions.Quiet Play", False },
    { "menuOptions.Show Thinking", False },
    { "menuOptions.Periodic Updates", False },  
    { "menuOptions.Ponder Next Move", False },
    { "menuHelp.Hint", False },
    { "menuHelp.Book", False },
    { NULL, False }
};

Enables gnuEnables[] = {    
    { "menuMode.ICS Client", False },
    { "menuMode.ICS Input Box", False },
    { "menuAction.Accept", False },
    { "menuAction.Decline", False },
    { "menuAction.Rematch", False },
    { "menuAction.Adjourn", False },
    { "menuAction.Stop Examining", False },
    { "menuAction.Stop Observing", False },
    { "menuStep.Revert", False },
    { "menuOptions.Auto Comment", False },
    { "menuOptions.Auto Observe", False },
    { "menuOptions.Auto Raise Board", False },
    { "menuOptions.Get Move List", False },
    { "menuOptions.Premove", False },
    { "menuOptions.Quiet Play", False },

    /* The next two options rely on SetCmailMode being called *after*    */
    /* SetGNUMode so that when GNU is being used to give hints these     */
    /* menu options are still available                                  */

    { "menuFile.Mail Move", False },
    { "menuFile.Reload CMail Message", False },
    { NULL, False }
};

Enables cmailEnables[] = {    
    { "Action", True },
    { "menuAction.Call Flag", False },
    { "menuAction.Draw", True },
    { "menuAction.Adjourn", False },
    { "menuAction.Abort", False },
    { "menuAction.Stop Observing", False },
    { "menuAction.Stop Examining", False },
    { "menuFile.Mail Move", True },
    { "menuFile.Reload CMail Message", True },
    { NULL, False }
};

Enables trainingOnEnables[] = {    
  { "menuMode.Edit Comment", False },
  { "menuMode.Pause", False },
  { "menuStep.Forward", False },
  { "menuStep.Backward", False },
  { "menuStep.Forward to End", False },
  { "menuStep.Back to Start", False },
  { "menuStep.Move Now", False },
  { "menuStep.Truncate Game", False },
  { NULL, False }
};

Enables trainingOffEnables[] = {    
  { "menuMode.Edit Comment", True },
  { "menuMode.Pause", True },
  { "menuStep.Forward", True },
  { "menuStep.Backward", True },
  { "menuStep.Forward to End", True },
  { "menuStep.Back to Start", True },
  { "menuStep.Move Now", True },
  { "menuStep.Truncate Game", True },
  { NULL, False }
};

Enables machineThinkingEnables[] = {
  { "menuFile.Load Game", False },
  { "menuFile.Load Next Game", False },
  { "menuFile.Load Previous Game", False },
  { "menuFile.Reload Same Game", False },
  { "menuFile.Paste Game", False },
  { "menuFile.Load Position", False },
  { "menuFile.Load Next Position", False },
  { "menuFile.Load Previous Position", False },
  { "menuFile.Reload Same Position", False },
  { "menuFile.Paste Position", False },
  { "menuMode.Machine White", False },
  { "menuMode.Machine Black", False },
  { "menuMode.Two Machines", False },
  { "menuStep.Retract Move", False },
  { NULL, False }
};

Enables userThinkingEnables[] = {
  { "menuFile.Load Game", True },
  { "menuFile.Load Next Game", True },
  { "menuFile.Load Previous Game", True },
  { "menuFile.Reload Same Game", True },
  { "menuFile.Paste Game", True },
  { "menuFile.Load Position", True },
  { "menuFile.Load Next Position", True },
  { "menuFile.Load Previous Position", True },
  { "menuFile.Reload Same Position", True },
  { "menuFile.Paste Position", True },
  { "menuMode.Machine White", True },
  { "menuMode.Machine Black", True },
  { "menuMode.Two Machines", True },
  { "menuStep.Retract Move", True },
  { NULL, False }
};

void SetICSMode()
{
  SetMenuEnables(icsEnables);
}

void
SetNCPMode()
{
  SetMenuEnables(ncpEnables);
}

void
SetGNUMode()
{
  SetMenuEnables(gnuEnables);
}

void
SetCmailMode()
{
  SetMenuEnables(cmailEnables);
}

void
SetTrainingModeOn()
{
  SetMenuEnables(trainingOnEnables);
  if (appData.showButtonBar) {
    XtSetSensitive(buttonBarWidget, False);
  }
  CommentPopDown();
}

void
SetTrainingModeOff()
{
  SetMenuEnables(trainingOffEnables);
  if (appData.showButtonBar) {
    XtSetSensitive(buttonBarWidget, True);
  }
}

void
SetUserThinkingEnables()
{
  if (appData.noChessProgram) return;
  SetMenuEnables(userThinkingEnables);
}

void
SetMachineThinkingEnables()
{
  if (appData.noChessProgram) return;
  SetMenuEnables(machineThinkingEnables);
  switch (gameMode) {
  case MachinePlaysBlack:
  case MachinePlaysWhite:
  case TwoMachinesPlay:
    XtSetSensitive(XtNameToWidget(menuBarWidget,
                          ModeToWidgetName(gameMode)), True);
    break;
  default:
    break;
  }
}

#define Abs(n) ((n)<0 ? -(n) : (n))

/*
 * Find a font that matches "pattern" that is as close as
 * possible to the targetPxlSize.  Prefer fonts that are k
 * pixels smaller to fonts that are k pixels larger.  The
 * pattern must be in the X Consortium standard format, 
 * e.g. "-*-helvetica-bold-r-normal--*-*-*-*-*-*-*-*".
 * The return value should be freed with XtFree when no
 * longer needed.
 */
char *FindFont(pattern, targetPxlSize)
     char *pattern;
     int targetPxlSize;
{
    char **fonts, *p, *best, *scalable, *scalableTail;
    int i, j, nfonts, minerr, err, pxlSize;

    fonts = XListFonts(xDisplay, pattern, 999999, &nfonts);
    if (nfonts < 1) {
      fprintf(stderr, "%s: no fonts match pattern %s\n",
            programName, pattern);
      exit(2);
    }
    best = fonts[0];
    scalable = NULL;
    minerr = 999999;
    for (i=0; i<nfonts; i++) {
      j = 0;
      p = fonts[i];
      if (*p != '-') continue;
      while (j < 7) {
          if (*p == NULLCHAR) break;
          if (*p++ == '-') j++;
      }
      if (j < 7) continue;
      pxlSize = atoi(p);
      if (pxlSize == 0) {
          scalable = fonts[i];
          scalableTail = p;
      } else {
          err = pxlSize - targetPxlSize;
          if (Abs(err) < Abs(minerr) ||
              (minerr > 0 && err < 0 && -err == minerr)) {
              best = fonts[i];
              minerr = err;
          }
      }
    }
    if (scalable && Abs(minerr) > appData.fontSizeTolerance) {
        /* If the error is too big and there is a scalable font,
         use the scalable font. */
        int headlen = scalableTail - scalable;
        p = (char *) XtMalloc(strlen(scalable) + 10);
      while (isdigit(*scalableTail)) scalableTail++;
      sprintf(p, "%.*s%d%s", headlen, scalable, targetPxlSize, scalableTail);
    } else {
        p = (char *) XtMalloc(strlen(best) + 1);
        strcpy(p, best);
    }
    if (appData.debugMode) {
        fprintf(debugFP, "resolved %s at pixel size %d\n  to %s\n",
            pattern, targetPxlSize, p);
    }
    XFreeFontNames(fonts);
    return p;
}

void CreateGCs()
{
    XtGCMask value_mask = GCLineWidth | GCLineStyle | GCForeground
      | GCBackground | GCFunction | GCPlaneMask;
    XGCValues gc_values;
    GC copyInvertedGC;
    
    gc_values.plane_mask = AllPlanes;
    gc_values.line_width = lineGap;
    gc_values.line_style = LineSolid;
    gc_values.function = GXcopy;
    
    gc_values.foreground = XBlackPixel(xDisplay, xScreen);
    gc_values.background = XBlackPixel(xDisplay, xScreen);
    lineGC = XtGetGC(shellWidget, value_mask, &gc_values);
    
    gc_values.foreground = XBlackPixel(xDisplay, xScreen);
    gc_values.background = XWhitePixel(xDisplay, xScreen);
    coordGC = XtGetGC(shellWidget, value_mask, &gc_values);
    XSetFont(xDisplay, coordGC, coordFontID);
    
    if (appData.monoMode) {
      gc_values.foreground = XWhitePixel(xDisplay, xScreen);
      gc_values.background = XWhitePixel(xDisplay, xScreen);
      highlineGC = XtGetGC(shellWidget, value_mask, &gc_values);  

      gc_values.foreground = XWhitePixel(xDisplay, xScreen);
      gc_values.background = XBlackPixel(xDisplay, xScreen);
      lightSquareGC = wbPieceGC 
        = XtGetGC(shellWidget, value_mask, &gc_values);

      gc_values.foreground = XBlackPixel(xDisplay, xScreen);
      gc_values.background = XWhitePixel(xDisplay, xScreen);
      darkSquareGC = bwPieceGC
        = XtGetGC(shellWidget, value_mask, &gc_values);

      if (DefaultDepth(xDisplay, xScreen) == 1) {
          /* Avoid XCopyPlane on 1-bit screens to work around Sun bug */
          gc_values.function = GXcopyInverted;
          copyInvertedGC = XtGetGC(shellWidget, value_mask, &gc_values);
          gc_values.function = GXcopy;
          if (XBlackPixel(xDisplay, xScreen) == 1) {
            bwPieceGC = darkSquareGC;
            wbPieceGC = copyInvertedGC;
          } else {
            bwPieceGC = copyInvertedGC;
            wbPieceGC = lightSquareGC;
          }
      }
    } else {
      gc_values.foreground = highlightSquareColor;
      gc_values.background = highlightSquareColor;
      highlineGC = XtGetGC(shellWidget, value_mask, &gc_values);  

      gc_values.foreground = premoveHighlightColor;
      gc_values.background = premoveHighlightColor;
      prelineGC = XtGetGC(shellWidget, value_mask, &gc_values);   

      gc_values.foreground = lightSquareColor;
      gc_values.background = darkSquareColor;
      lightSquareGC = XtGetGC(shellWidget, value_mask, &gc_values);
      
      gc_values.foreground = darkSquareColor;
      gc_values.background = lightSquareColor;
      darkSquareGC = XtGetGC(shellWidget, value_mask, &gc_values);

      gc_values.foreground = jailSquareColor;
      gc_values.background = jailSquareColor;
      jailSquareGC = XtGetGC(shellWidget, value_mask, &gc_values);

      gc_values.foreground = whitePieceColor;
      gc_values.background = darkSquareColor;
      wdPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);
      
      gc_values.foreground = whitePieceColor;
      gc_values.background = lightSquareColor;
      wlPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);
      
      gc_values.foreground = whitePieceColor;
      gc_values.background = jailSquareColor;
      wjPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);
      
      gc_values.foreground = blackPieceColor;
      gc_values.background = darkSquareColor;
      bdPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);
      
      gc_values.foreground = blackPieceColor;
      gc_values.background = lightSquareColor;
      blPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);

      gc_values.foreground = blackPieceColor;
      gc_values.background = jailSquareColor;
      bjPieceGC = XtGetGC(shellWidget, value_mask, &gc_values);
    }
}

void loadXIM(xim, xmask, filename, dest, mask)
     XImage *xim;
     XImage *xmask;
     char *filename;
     Pixmap *dest;
     Pixmap *mask;
{
    int x, y, w, h, p;
    FILE *fp;
    Pixmap temp;
    XGCValues     values;
    GC maskGC;

    fp = fopen(filename, "rb");
    if (!fp) {
      fprintf(stderr, "%s: error loading XIM!\n", programName);
      exit(1);
    }
        
    w = fgetc(fp);
    h = fgetc(fp);
  
    for (y=0; y<h; ++y) {
      for (x=0; x<h; ++x) {
          p = fgetc(fp);

          switch (p) {
            case 0:     
            XPutPixel(xim, x, y, blackPieceColor); 
            if (xmask)
              XPutPixel(xmask, x, y, WhitePixel(xDisplay,xScreen));
            break;
            case 1:     
            XPutPixel(xim, x, y, darkSquareColor); 
            if (xmask)
              XPutPixel(xmask, x, y, BlackPixel(xDisplay,xScreen));
            break;
            case 2:     
            XPutPixel(xim, x, y, whitePieceColor); 
            if (xmask)
              XPutPixel(xmask, x, y, WhitePixel(xDisplay,xScreen));
            break;
            case 3:     
            XPutPixel(xim, x, y, lightSquareColor);
            if (xmask)
              XPutPixel(xmask, x, y, BlackPixel(xDisplay,xScreen));
            break;
          }
      }
    }

    /* create Pixmap of piece */
    *dest = XCreatePixmap(xDisplay, DefaultRootWindow(xDisplay),
                    w, h, xim->depth);
    XPutImage(xDisplay, *dest, lightSquareGC, xim,
            0, 0, 0, 0, w, h);  

    /* create Pixmap of clipmask 
       Note: We assume the white/black pieces have the same
             outline, so we make only 6 masks. This is okay
             since the XPM clipmask routines do the same. */
    if (xmask) {
      temp = XCreatePixmap(xDisplay, DefaultRootWindow(xDisplay),
                      w, h, xim->depth);
      XPutImage(xDisplay, temp, lightSquareGC, xmask,
            0, 0, 0, 0, w, h);  

      /* now create the 1-bit version */
      *mask = XCreatePixmap(xDisplay, DefaultRootWindow(xDisplay),
                    w, h, 1);

      values.foreground = 1;
      values.background = 0;

      /* Don't use XtGetGC, not read only */
      maskGC = XCreateGC(xDisplay, *mask, 
                GCForeground | GCBackground, &values);
      XCopyPlane(xDisplay, temp, *mask, maskGC, 
              0, 0, squareSize, squareSize, 0, 0, 1);
      XFreePixmap(xDisplay, temp);
    }
}

void CreateXIMPieces()
{
    int piece, kind;
    char buf[MSG_SIZ];
    u_int ss;
    static char *ximkind[] = { "ll", "ld", "dl", "dd" };
    XImage *ximtemp;

    ss = squareSize;

    /* The XSynchronize calls were copied from CreatePieces.
       Not sure if needed, but can't hurt */
    XSynchronize(xDisplay, True); /* Work-around for xlib/xt
                             buffering bug */
  
    /* temp needed by loadXIM() */
    ximtemp = XGetImage(xDisplay, DefaultRootWindow(xDisplay),
             0, 0, ss, ss, AllPlanes, XYPixmap);

    if (strlen(appData.pixmapDirectory) == 0) {
      useImages = 0;
    } else {
      useImages = 1;
      if (appData.monoMode) {
        DisplayFatalError("XIM pieces cannot be used in monochrome mode",
                      0, 2);
        ExitEvent(2);
      }
      fprintf(stderr, "\nLoading XIMs...\n");
      /* Load pieces */
      for (piece = (int) WhitePawn; piece <= (int) WhiteKing; piece++) {
          fprintf(stderr, "%d", piece+1);
          for (kind=0; kind<4; kind++) {
            fprintf(stderr, ".");
            sprintf(buf, "%s/%c%s%u.xim",
                  ExpandPathName(appData.pixmapDirectory),
                  ToLower(PieceToChar((ChessSquare)piece)),
                  ximkind[kind], ss);
            ximPieceBitmap[kind][piece] =
              XGetImage(xDisplay, DefaultRootWindow(xDisplay),
                      0, 0, ss, ss, AllPlanes, XYPixmap);
            if (appData.debugMode)
              fprintf(stderr, "(File:%s:) ", buf);
            loadXIM(ximPieceBitmap[kind][piece], 
                  ximtemp, buf,
                  &(xpmPieceBitmap[kind][piece]),
                  &(ximMaskPm[piece%6]));
          }
          fprintf(stderr," ");
      }
      /* Load light and dark squares */
      /* If the LSQ and DSQ pieces don't exist, we will 
         draw them with solid squares. */
      sprintf(buf, "%s/lsq%u.xim", ExpandPathName(appData.pixmapDirectory), ss);
      if (access(buf, 0) != 0) {
          useImageSqs = 0;
      } else {
          useImageSqs = 1;
          fprintf(stderr, "light square ");
          ximLightSquare= 
            XGetImage(xDisplay, DefaultRootWindow(xDisplay),
                  0, 0, ss, ss, AllPlanes, XYPixmap);
          if (appData.debugMode)
            fprintf(stderr, "(File:%s:) ", buf);

          loadXIM(ximLightSquare, NULL, buf, &xpmLightSquare, NULL);
          fprintf(stderr, "dark square ");
          sprintf(buf, "%s/dsq%u.xim",
                ExpandPathName(appData.pixmapDirectory), ss);
          if (appData.debugMode)
            fprintf(stderr, "(File:%s:) ", buf);
          ximDarkSquare= 
            XGetImage(xDisplay, DefaultRootWindow(xDisplay),
                  0, 0, ss, ss, AllPlanes, XYPixmap);
          loadXIM(ximDarkSquare, NULL, buf, &xpmDarkSquare, NULL);
          xpmJailSquare = xpmLightSquare;
      }
      fprintf(stderr, "Done.\n");
    }
    XSynchronize(xDisplay, False); /* Work-around for xlib/xt buffering bug */
}

#if HAVE_LIBXPM
void CreateXPMPieces()
{
    int piece, kind, r;
    char buf[MSG_SIZ];
    u_int ss = squareSize;
    XpmAttributes attr;
    static char *xpmkind[] = { "ll", "ld", "dl", "dd" };
    XpmColorSymbol symbols[4];

#if 0
    /* Apparently some versions of Xpm don't define XpmFormat at all --tpm */
    if (appData.debugMode) {
      fprintf(stderr, "XPM Library Version: %d.%d%c\n", 
            XpmFormat, XpmVersion, (char)('a' + XpmRevision - 1));
    }
#endif
  
    /* The XSynchronize calls were copied from CreatePieces.
       Not sure if needed, but can't hurt */
    XSynchronize(xDisplay, True); /* Work-around for xlib/xt buffering bug */
  
    /* Setup translations so piece colors match square colors */
    symbols[0].name = "light_piece";
    symbols[0].value = appData.whitePieceColor;
    symbols[1].name = "dark_piece";
    symbols[1].value = appData.blackPieceColor;
    symbols[2].name = "light_square";
    symbols[2].value = appData.lightSquareColor;
    symbols[3].name = "dark_square";
    symbols[3].value = appData.darkSquareColor;

    attr.valuemask = XpmColorSymbols;
    attr.colorsymbols = symbols;
    attr.numsymbols = 4;

    if (appData.monoMode) {
      DisplayFatalError("XPM pieces cannot be used in monochrome mode",
                  0, 2);
      ExitEvent(2);
    }
    if (strlen(appData.pixmapDirectory) == 0) {
      XpmPieces* pieces = builtInXpms;
      useImages = 1;
      /* Load pieces */
      while (pieces->size != squareSize && pieces->size) pieces++;
      if (!pieces->size) {
        fprintf(stderr, "No builtin XPM pieces of size %d\n", squareSize);
        exit(1);
      }
      for (piece = (int) WhitePawn; piece <= (int) WhiteKing; piece++) {
          for (kind=0; kind<4; kind++) {

            if ((r=XpmCreatePixmapFromData(xDisplay, xBoardWindow,
                                     pieces->xpm[piece][kind],
                                     &(xpmPieceBitmap[kind][piece]),
                                     NULL, &attr)) != 0) {
              fprintf(stderr, "Error %d loading XPM image \"%s\"\n",
                    r, buf);
              exit(1); 
            }     
          } 
      }
      useImageSqs = 0;
      xpmJailSquare = xpmLightSquare;
    } else {
      useImages = 1;
      
      fprintf(stderr, "\nLoading XPMs...\n");

      /* Load pieces */
      for (piece = (int) WhitePawn; piece <= (int) WhiteKing; piece++) {
          fprintf(stderr, "%d ", piece+1);
          for (kind=0; kind<4; kind++) {
            sprintf(buf, "%s/%c%s%u.xpm",
                  ExpandPathName(appData.pixmapDirectory),
                  ToLower(PieceToChar((ChessSquare)piece)),
                  xpmkind[kind], ss);
            if (appData.debugMode) {
                fprintf(stderr, "(File:%s:) ", buf);
            }
            if ((r=XpmReadFileToPixmap(xDisplay, xBoardWindow, buf,
                                 &(xpmPieceBitmap[kind][piece]),
                                 NULL, &attr)) != 0) {
                fprintf(stderr, "Error %d loading XPM file \"%s\"\n",
                      r, buf);
                exit(1); 
            }     
          } 
      }
      /* Load light and dark squares */
      /* If the LSQ and DSQ pieces don't exist, we will 
         draw them with solid squares. */
      fprintf(stderr, "light square ");
      sprintf(buf, "%s/lsq%u.xpm", ExpandPathName(appData.pixmapDirectory), ss);
      if (access(buf, 0) != 0) {
          useImageSqs = 0;
      } else {
          useImageSqs = 1;
          if (appData.debugMode)
            fprintf(stderr, "(File:%s:) ", buf);

          if ((r=XpmReadFileToPixmap(xDisplay, xBoardWindow, buf,
                               &xpmLightSquare, NULL, &attr)) != 0) {
            fprintf(stderr, "Error %d loading XPM file \"%s\"\n", r, buf);
            exit(1);
          }
          fprintf(stderr, "dark square ");
          sprintf(buf, "%s/dsq%u.xpm",
                ExpandPathName(appData.pixmapDirectory), ss);
          if (appData.debugMode) {
            fprintf(stderr, "(File:%s:) ", buf);
          }
          if ((r=XpmReadFileToPixmap(xDisplay, xBoardWindow, buf,
                               &xpmDarkSquare, NULL, &attr)) != 0) {
            fprintf(stderr, "Error %d loading XPM file \"%s\"\n", r, buf);
            exit(1);
          }
      }
      xpmJailSquare = xpmLightSquare;
      fprintf(stderr, "Done.\n");
    }
    XSynchronize(xDisplay, False); /* Work-around for xlib/xt
                              buffering bug */  
}
#endif /* HAVE_LIBXPM */

#if HAVE_LIBXPM
/* No built-in bitmaps */
void CreatePieces()
{
    int piece, kind;
    char buf[MSG_SIZ];
    u_int ss = squareSize;
      
    XSynchronize(xDisplay, True); /* Work-around for xlib/xt
                             buffering bug */

    for (kind = SOLID; kind <= (appData.monoMode ? OUTLINE : SOLID); kind++) {
      for (piece = (int) WhitePawn; piece <= (int) WhiteKing; piece++) {
          sprintf(buf, "%c%u%c.bm", ToLower(PieceToChar((ChessSquare)piece)),
                ss, kind == SOLID ? 's' : 'o');
          ReadBitmap(&pieceBitmap[kind][piece], buf, NULL, ss, ss);
      }
    }
    
    XSynchronize(xDisplay, False); /* Work-around for xlib/xt
                              buffering bug */
}
#else
/* With built-in bitmaps */
void CreatePieces()
{
    BuiltInBits* bib = builtInBits;
    int piece, kind;
    char buf[MSG_SIZ];
    u_int ss = squareSize;
      
    XSynchronize(xDisplay, True); /* Work-around for xlib/xt
                             buffering bug */

    while (bib->squareSize != ss && bib->squareSize != 0) bib++;

    for (kind = SOLID; kind <= (appData.monoMode ? OUTLINE : SOLID); kind++) {
      for (piece = (int) WhitePawn; piece <= (int) WhiteKing; piece++) {
          sprintf(buf, "%c%u%c.bm", ToLower(PieceToChar((ChessSquare)piece)),
                ss, kind == SOLID ? 's' : 'o');
          ReadBitmap(&pieceBitmap[kind][piece], buf,
                   bib->bits[kind][piece], ss, ss);
      }
    }
    
    XSynchronize(xDisplay, False); /* Work-around for xlib/xt
                              buffering bug */
}
#endif

void ReadBitmap(pm, name, bits, wreq, hreq)
     Pixmap *pm;
     String name;
     unsigned char bits[];
     u_int wreq, hreq;
{
    int x_hot, y_hot;
    u_int w, h;
    int errcode;
    char msg[MSG_SIZ], fullname[MSG_SIZ];
    
    if (*appData.bitmapDirectory != NULLCHAR) {
        strcpy(fullname, appData.bitmapDirectory);
      strcat(fullname, "/");
      strcat(fullname, name);
      errcode = XReadBitmapFile(xDisplay, xBoardWindow, fullname,
                          &w, &h, pm, &x_hot, &y_hot);
      if (errcode != BitmapSuccess) {
          switch (errcode) {
            case BitmapOpenFailed:
            sprintf(msg, "Can't open bitmap file %s", fullname);
            break;
            case BitmapFileInvalid:
            sprintf(msg, "Invalid bitmap in file %s", fullname);
            break;
            case BitmapNoMemory:
            sprintf(msg, "Ran out of memory reading bitmap file %s",
                  fullname);
            break;
            default:
            sprintf(msg, "Unknown XReadBitmapFile error %d on file %s",
                  errcode, fullname);
            break;
          }
          fprintf(stderr, "%s: %s...using built-in\n",
                programName, msg);
      } else if (w != wreq || h != hreq) {
          fprintf(stderr,
                "%s: Bitmap %s is %dx%d, not %dx%d...using built-in\n",
                programName, fullname, w, h, wreq, hreq);
      } else {
          return;
      }
    }
    if (bits == NULL) {
      fprintf(stderr, "%s: No built-in bitmap for %s; giving up\n",
            programName, name);
      exit(1);
    } else {
      *pm = XCreateBitmapFromData(xDisplay, xBoardWindow, (char *) bits,
                            wreq, hreq);
    }
}

void CreateGrid()
{
    int i;
    
    if (lineGap == 0) return;
    for (i = 0; i < BOARD_SIZE + 1; i++) {
      gridSegments[i].x1 = 0;
      gridSegments[i].x2 =
        lineGap + BOARD_SIZE * (squareSize + lineGap);
      gridSegments[i].y1 = gridSegments[i].y2
        = lineGap / 2 + (i * (squareSize + lineGap));

      gridSegments[i + BOARD_SIZE + 1].y1 = 0;
      gridSegments[i + BOARD_SIZE + 1].y2 =
        BOARD_SIZE * (squareSize + lineGap);
      gridSegments[i + BOARD_SIZE + 1].x1 =
        gridSegments[i + BOARD_SIZE + 1].x2
          = lineGap / 2 + (i * (squareSize + lineGap));
    }
}

static void MenuBarSelect(w, addr, index)
     Widget w;
     caddr_t addr;
     caddr_t index;
{
    XtActionProc proc = (XtActionProc) addr;

    (proc)(NULL, NULL, NULL, NULL);
}

void CreateMenuBarPopup(parent, name, mb)
     Widget parent;
     String name;
     Menu *mb;
{
    int j;
    Widget menu, entry;
    MenuItem *mi;
    Arg args[16];

    menu = XtCreatePopupShell(name, simpleMenuWidgetClass,
                        parent, NULL, 0);
    j = 0;
    XtSetArg(args[j], XtNleftMargin, 20);   j++;
    XtSetArg(args[j], XtNrightMargin, 20);  j++;
    mi = mb->mi;
    while (mi->string != NULL) {
      if (strcmp(mi->string, "----") == 0) {
          entry = XtCreateManagedWidget(mi->string, smeLineObjectClass,
                                menu, args, j);
      } else {
          entry = XtCreateManagedWidget(mi->string, smeBSBObjectClass,
                                menu, args, j);
          XtAddCallback(entry, XtNcallback,
                    (XtCallbackProc) MenuBarSelect,
                    (caddr_t) mi->proc);
      }
      mi++;
    }
}     

Widget CreateMenuBar(mb)
     Menu *mb;
{
    int j;
    Widget anchor, menuBar;
    Arg args[16];
    char menuName[MSG_SIZ];

    j = 0;
    XtSetArg(args[j], XtNorientation, XtorientHorizontal);  j++;
    XtSetArg(args[j], XtNvSpace, 0);                        j++;
    XtSetArg(args[j], XtNborderWidth, 0);                   j++;
    menuBar = XtCreateWidget("menuBar", boxWidgetClass,
                       formWidget, args, j);

    while (mb->name != NULL) {
      strcpy(menuName, "menu");
      strcat(menuName, mb->name);
      j = 0;
      XtSetArg(args[j], XtNmenuName, XtNewString(menuName));  j++;
      if (tinyLayout) {
          char shortName[2];
          shortName[0] = mb->name[0];
          shortName[1] = NULLCHAR;
          XtSetArg(args[j], XtNlabel, XtNewString(shortName)); j++;
      }
      XtSetArg(args[j], XtNborderWidth, 0);                   j++;
      anchor = XtCreateManagedWidget(mb->name, menuButtonWidgetClass,
                               menuBar, args, j);
      CreateMenuBarPopup(menuBar, menuName, mb);
      mb++;
    }
    return menuBar;
}

Widget CreateButtonBar(mi)
     MenuItem *mi;
{
    int j;
    Widget button, buttonBar;
    Arg args[16];

    j = 0;
    XtSetArg(args[j], XtNorientation, XtorientHorizontal); j++;
    if (tinyLayout) {
      XtSetArg(args[j], XtNhSpace, 0); j++;
    }
    XtSetArg(args[j], XtNborderWidth, 0); j++;
    XtSetArg(args[j], XtNvSpace, 0);                        j++;
    buttonBar = XtCreateWidget("buttonBar", boxWidgetClass,
                         formWidget, args, j);

    while (mi->string != NULL) {
      j = 0;
      if (tinyLayout) {
          XtSetArg(args[j], XtNinternalWidth, 2); j++;
          XtSetArg(args[j], XtNborderWidth, 0); j++;
      }
      button = XtCreateManagedWidget(mi->string, commandWidgetClass,
                               buttonBar, args, j);
      XtAddCallback(button, XtNcallback,
                  (XtCallbackProc) MenuBarSelect,
                  (caddr_t) mi->proc);
      mi++;
    }
    return buttonBar;
}     

Widget
CreatePieceMenu(name, color)
     char *name;
     int color;
{
    int i;
    Widget entry, menu;
    Arg args[16];
    ChessSquare selection;

    menu = XtCreatePopupShell(name, simpleMenuWidgetClass,
                        boardWidget, args, 0);
    
    for (i = 0; i < PIECE_MENU_SIZE; i++) {
      String item = pieceMenuStrings[color][i];
      
      if (strcmp(item, "----") == 0) {
          entry = XtCreateManagedWidget(item, smeLineObjectClass,
                                menu, NULL, 0);
      } else {
          entry = XtCreateManagedWidget(item, smeBSBObjectClass,
                                menu, NULL, 0);
          selection = pieceMenuTranslation[color][i];
          XtAddCallback(entry, XtNcallback,
                    (XtCallbackProc) PieceMenuSelect,
                    (caddr_t) selection);
          if (selection == WhitePawn || selection == BlackPawn) {
            XtSetArg(args[0], XtNpopupOnEntry, entry);
            XtSetValues(menu, args, 1);
          }
      }
    }
    return menu;
}

void
CreatePieceMenus()
{
    int i;
    Widget entry;
    Arg args[16];
    ChessSquare selection;

    whitePieceMenu = CreatePieceMenu("menuW", 0);
    blackPieceMenu = CreatePieceMenu("menuB", 1);
    
    XtRegisterGrabAction(PieceMenuPopup, True,
                   (unsigned)(ButtonPressMask|ButtonReleaseMask),
                   GrabModeAsync, GrabModeAsync);

    XtSetArg(args[0], XtNlabel, "Drop");
    dropMenu = XtCreatePopupShell("menuD", simpleMenuWidgetClass,
                          boardWidget, args, 1);
    for (i = 0; i < DROP_MENU_SIZE; i++) {
      String item = dropMenuStrings[i];
      
      if (strcmp(item, "----") == 0) {
          entry = XtCreateManagedWidget(item, smeLineObjectClass,
                                dropMenu, NULL, 0);
      } else {
          entry = XtCreateManagedWidget(item, smeBSBObjectClass,
                                dropMenu, NULL, 0);
          selection = dropMenuTranslation[i];
          XtAddCallback(entry, XtNcallback,
                    (XtCallbackProc) DropMenuSelect,
                    (caddr_t) selection);
      }
    }
}     

void SetupDropMenu()
{
    int i, j, count;
    char label[32];
    Arg args[16];
    Widget entry;
    char* p;

    for (i=0; i<sizeof(dmEnables)/sizeof(DropMenuEnables); i++) {
      entry = XtNameToWidget(dropMenu, dmEnables[i].widget);
      p = strchr(gameMode == IcsPlayingWhite ? white_holding : black_holding,
               dmEnables[i].piece);
      XtSetSensitive(entry, p != NULL || !appData.testLegality
                   /*!!temp:*/ || (gameInfo.variant == VariantCrazyhouse
                               && !appData.icsActive));
      count = 0;
      while (p && *p++ == dmEnables[i].piece) count++;
      sprintf(label, "%s  %d", dmEnables[i].widget, count);
      j = 0;
      XtSetArg(args[j], XtNlabel, label); j++;
      XtSetValues(entry, args, j);
    }
}

void PieceMenuPopup(w, event, params, num_params)
     Widget w;
     XEvent *event;
     String *params;
     Cardinal *num_params;
{
    String whichMenu;
    if (event->type != ButtonPress) return;
    if (errorUp) ErrorPopDown();
    switch (gameMode) {
      case EditPosition:
      case IcsExamining:
      whichMenu = params[0];
      break;
      case IcsPlayingWhite:
      case IcsPlayingBlack:
      case EditGame:
      case MachinePlaysWhite:
      case MachinePlaysBlack:
      if (appData.testLegality &&
          gameInfo.variant != VariantBughouse &&
          gameInfo.variant != VariantCrazyhouse) return;
      SetupDropMenu();
      whichMenu = "menuD";
      break;
      default:
      return;
    }
    
    if (((pmFromX = EventToSquare(event->xbutton.x, BOARD_SIZE)) < 0) ||
      ((pmFromY = EventToSquare(event->xbutton.y, BOARD_SIZE)) < 0)) {
      pmFromX = pmFromY = -1;
      return;
    }
    if (flipView)
      pmFromX = BOARD_SIZE - 1 - pmFromX;
    else
      pmFromY = BOARD_SIZE - 1 - pmFromY;
    
    XtPopupSpringLoaded(XtNameToWidget(boardWidget, whichMenu));
}

static void PieceMenuSelect(w, piece, junk)
     Widget w;
     ChessSquare piece;
     caddr_t junk;
{
    if (pmFromX < 0 || pmFromY < 0) return;
    EditPositionMenuEvent(piece, pmFromX, pmFromY);
}

static void DropMenuSelect(w, piece, junk)
     Widget w;
     ChessSquare piece;
     caddr_t junk;
{
    if (pmFromX < 0 || pmFromY < 0) return;
    DropMenuEvent(piece, pmFromX, pmFromY);
}

void WhiteClock(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (gameMode == EditPosition || gameMode == IcsExamining) {
      SetWhiteToPlayEvent();
    } else if (gameMode == IcsPlayingBlack || gameMode == MachinePlaysWhite) {
      CallFlagEvent();
    }
}

void BlackClock(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (gameMode == EditPosition || gameMode == IcsExamining) {
      SetBlackToPlayEvent();
    } else if (gameMode == IcsPlayingWhite || gameMode == MachinePlaysBlack) {
      CallFlagEvent();
    }
}


/*
 * If the user selects on a border boundary, return -1; if off the board,
 *   return -2.  Otherwise map the event coordinate to the square.
 */
int EventToSquare(x, limit)
     int x;
{
    if (x <= 0) 
      return -2;
    if (x < lineGap)
      return -1;
    x -= lineGap;
    if ((x % (squareSize + lineGap)) >= squareSize)
      return -1;
    x /= (squareSize + lineGap);
    if (x >= limit)
      return -2;
    return x;
}

static void do_flash_delay(msec)
     unsigned long msec;
{
    TimeDelay(msec);
}

static void drawHighlight(file, rank, gc)
     int file, rank;
     GC gc;
{
    int x, y;

    if (lineGap == 0 || appData.blindfold) return;
    
    if (flipView) {
      x = lineGap/2 + ((BOARD_SIZE-1)-file) * 
        (squareSize + lineGap);
      y = lineGap/2 + rank * (squareSize + lineGap);
    } else {
      x = lineGap/2 + file * (squareSize + lineGap);
      y = lineGap/2 + ((BOARD_SIZE-1)-rank) * 
        (squareSize + lineGap);
    }
    
    XDrawRectangle(xDisplay, xBoardWindow, gc, x, y,
               squareSize+lineGap, squareSize+lineGap);
}

int hi1X = -1, hi1Y = -1, hi2X = -1, hi2Y = -1;
int pm1X = -1, pm1Y = -1, pm2X = -1, pm2Y = -1;

void
SetHighlights(fromX, fromY, toX, toY)
     int fromX, fromY, toX, toY;
{
    if (hi1X != fromX || hi1Y != fromY) {
      if (hi1X >= 0 && hi1Y >= 0) {
          drawHighlight(hi1X, hi1Y, lineGC);
      }
      if (fromX >= 0 && fromY >= 0) {
          drawHighlight(fromX, fromY, highlineGC);
      }
    }
    if (hi2X != toX || hi2Y != toY) {
      if (hi2X >= 0 && hi2Y >= 0) {
          drawHighlight(hi2X, hi2Y, lineGC);
      }
      if (toX >= 0 && toY >= 0) {
          drawHighlight(toX, toY, highlineGC);
      }
    }
    hi1X = fromX;
    hi1Y = fromY;
    hi2X = toX;
    hi2Y = toY;
}

void
ClearHighlights()
{
    SetHighlights(-1, -1, -1, -1);
}


void
SetPremoveHighlights(fromX, fromY, toX, toY)
     int fromX, fromY, toX, toY;
{
    if (pm1X != fromX || pm1Y != fromY) {
      if (pm1X >= 0 && pm1Y >= 0) {
          drawHighlight(pm1X, pm1Y, lineGC);
      }
      if (fromX >= 0 && fromY >= 0) {
          drawHighlight(fromX, fromY, prelineGC);
      }
    }
    if (pm2X != toX || pm2Y != toY) {
      if (pm2X >= 0 && pm2Y >= 0) {
          drawHighlight(pm2X, pm2Y, lineGC);
      }
      if (toX >= 0 && toY >= 0) {
          drawHighlight(toX, toY, prelineGC);
      }
    }
    pm1X = fromX;
    pm1Y = fromY;
    pm2X = toX;
    pm2Y = toY;
}

void
ClearPremoveHighlights()
{
  SetPremoveHighlights(-1, -1, -1, -1);
}

static void BlankSquare(x, y, color, piece, dest)
     int x, y, color;
     ChessSquare piece;
     Drawable dest;
{
    if (useImages && useImageSqs) {
      Pixmap pm;
      switch (color) {
        case 1: /* light */
          pm = xpmLightSquare;
          break;
        case 0: /* dark */
          pm = xpmDarkSquare;
          break;
        case 2: /* neutral */
        default:
          pm = xpmJailSquare;
          break;
      }
      XCopyArea(xDisplay, pm, dest, wlPieceGC, 0, 0,
              squareSize, squareSize, x, y);
    } else {
      GC gc;
      switch (color) {
        case 1: /* light */
          gc = lightSquareGC;
          break;
        case 0: /* dark */
          gc = darkSquareGC;
          break;
        case 2: /* neutral */
        default:
          gc = jailSquareGC;
          break;
      }
      XFillRectangle(xDisplay, dest, gc, x, y, squareSize, squareSize);
    }
}

/*
   I split out the routines to draw a piece so that I could
   make a generic flash routine.
*/
static void monoDrawPiece_1bit(piece, square_color, x, y, dest)
     ChessSquare piece;
     int square_color, x, y;
     Drawable dest;
{
    /* Avoid XCopyPlane on 1-bit screens to work around Sun bug */
    switch (square_color) {
      case 1: /* light */
      case 2: /* neutral */
      default:
      XCopyArea(xDisplay, (int) piece < (int) BlackPawn
              ? *pieceToOutline(piece)
              : *pieceToSolid(piece),
              dest, bwPieceGC, 0, 0,
              squareSize, squareSize, x, y);
      break;
      case 0: /* dark */
      XCopyArea(xDisplay, (int) piece < (int) BlackPawn
              ? *pieceToSolid(piece)
              : *pieceToOutline(piece),
              dest, wbPieceGC, 0, 0,
              squareSize, squareSize, x, y);
      break;
    }
}

static void monoDrawPiece(piece, square_color, x, y, dest)
     ChessSquare piece;
     int square_color, x, y;
     Drawable dest;
{
    switch (square_color) {
      case 1: /* light */
      case 2: /* neutral */
      default:
      XCopyPlane(xDisplay, (int) piece < (int) BlackPawn
               ? *pieceToOutline(piece)
               : *pieceToSolid(piece),
               dest, bwPieceGC, 0, 0,
               squareSize, squareSize, x, y, 1);
      break;
      case 0: /* dark */
      XCopyPlane(xDisplay, (int) piece < (int) BlackPawn
               ? *pieceToSolid(piece)
               : *pieceToOutline(piece),
               dest, wbPieceGC, 0, 0,
               squareSize, squareSize, x, y, 1);
      break;
    }
}

static void colorDrawPiece(piece, square_color, x, y, dest)
     ChessSquare piece;
     int square_color, x, y;
     Drawable dest;
{
    switch (square_color) {
      case 1: /* light */
      XCopyPlane(xDisplay, *pieceToSolid(piece),
               dest, (int) piece < (int) BlackPawn
               ? wlPieceGC : blPieceGC, 0, 0,
               squareSize, squareSize, x, y, 1);
      break;
      case 0: /* dark */
      XCopyPlane(xDisplay, *pieceToSolid(piece),
               dest, (int) piece < (int) BlackPawn
               ? wdPieceGC : bdPieceGC, 0, 0,
               squareSize, squareSize, x, y, 1);
      break;
      case 2: /* neutral */
      default:
      XCopyPlane(xDisplay, *pieceToSolid(piece),
               dest, (int) piece < (int) BlackPawn
               ? wjPieceGC : bjPieceGC, 0, 0,
               squareSize, squareSize, x, y, 1);
      break;
    }
}

static void colorDrawPieceImage(piece, square_color, x, y, dest)
     ChessSquare piece;
     int square_color, x, y;
     Drawable dest;
{
    int kind;

    switch (square_color) {
      case 1: /* light */
      case 2: /* neutral */
      default:
      if ((int)piece < (int) BlackPawn) {
          kind = 0;
      } else {
          kind = 2;
          piece -= BlackPawn;
      }
      break;
      case 0: /* dark */
      if ((int)piece < (int) BlackPawn) {
          kind = 1;
      } else {
          kind = 3;
          piece -= BlackPawn;
      }
      break;
    }
    XCopyArea(xDisplay, xpmPieceBitmap[kind][piece],
            dest, wlPieceGC, 0, 0,
            squareSize, squareSize, x, y);            
}

typedef void (*DrawFunc)();

DrawFunc ChooseDrawFunc()
{
    if (appData.monoMode) {
      if (DefaultDepth(xDisplay, xScreen) == 1) {
          return monoDrawPiece_1bit;
      } else {
          return monoDrawPiece;
      }
    } else {
      if (useImages)
        return colorDrawPieceImage;
      else
        return colorDrawPiece;
    }
}

void DrawSquare(row, column, piece, do_flash)
     int row, column, do_flash;
     ChessSquare piece;
{
    int square_color, x, y, direction, font_ascent, font_descent;
    int i;
    char string[2];
    XCharStruct overall;
    DrawFunc drawfunc;
    int flash_delay;

    /* Calculate delay in milliseconds (2-delays per complete flash) */
    flash_delay = 500 / appData.flashRate;
      
    if (flipView) {
      x = lineGap + ((BOARD_SIZE-1)-column) * 
        (squareSize + lineGap);
      y = lineGap + row * (squareSize + lineGap);
    } else {
      x = lineGap + column * (squareSize + lineGap);
      y = lineGap + ((BOARD_SIZE-1)-row) * 
        (squareSize + lineGap);
    }
    
    square_color = ((column + row) % 2) == 1;
    
    if (piece == EmptySquare || appData.blindfold) {
      BlankSquare(x, y, square_color, piece, xBoardWindow);
    } else {
      drawfunc = ChooseDrawFunc();
      if (do_flash && appData.flashCount > 0) {
          for (i=0; i<appData.flashCount; ++i) {

            drawfunc(piece, square_color, x, y, xBoardWindow);
            XSync(xDisplay, False);
            do_flash_delay(flash_delay);

            BlankSquare(x, y, square_color, piece, xBoardWindow);
            XSync(xDisplay, False);
            do_flash_delay(flash_delay);
          }
      }
      drawfunc(piece, square_color, x, y, xBoardWindow);
    }
      
    string[1] = NULLCHAR;
    if (appData.showCoords && row == (flipView ? 7 : 0)) {
      string[0] = 'a' + column;
      XTextExtents(coordFontStruct, string, 1, &direction, 
                 &font_ascent, &font_descent, &overall);
      if (appData.monoMode) {
          XDrawImageString(xDisplay, xBoardWindow, coordGC,
                       x + squareSize - overall.width - 2, 
                       y + squareSize - font_descent - 1, string, 1);
      } else {
          XDrawString(xDisplay, xBoardWindow, coordGC,
                  x + squareSize - overall.width - 2, 
                  y + squareSize - font_descent - 1, string, 1);
      }
    }
    if (appData.showCoords && column == (flipView ? 7 : 0)) {
      string[0] = '1' + row;
      XTextExtents(coordFontStruct, string, 1, &direction, 
                 &font_ascent, &font_descent, &overall);
      if (appData.monoMode) {
          XDrawImageString(xDisplay, xBoardWindow, coordGC,
                       x + 2, y + font_ascent + 1, string, 1);
      } else {
          XDrawString(xDisplay, xBoardWindow, coordGC,
                  x + 2, y + font_ascent + 1, string, 1);
      }         
    }   
}


/* Why is this needed on some versions of X? */
void EventProc(widget, unused, event)
     Widget widget;
     caddr_t unused;
     XEvent *event;
{
    if (!XtIsRealized(widget))
      return;

    switch (event->type) {
      case Expose:
      if (event->xexpose.count > 0) return;  /* no clipping is done */
      XDrawPosition(widget, True, NULL);
      break;
      default:
      return;
    }
}
/* end why */

void DrawPosition(fullRedraw, board)
     /*Boolean*/int fullRedraw;
     Board board;
{
    XDrawPosition(boardWidget, fullRedraw, board);
}

/* Returns 1 if there are "too many" differences between b1 and b2
   (i.e. more than 1 move was made) */
static int too_many_diffs(b1, b2)
     Board b1, b2;
{
    int i, j;
    int c = 0;
  
    for (i=0; i<BOARD_SIZE; ++i) {
      for (j=0; j<BOARD_SIZE; ++j) {
          if (b1[i][j] != b2[i][j]) {
            if (++c > 4)      /* Castling causes 4 diffs */
              return 1;
          }
      }
    }

    return 0;
}

/* Matrix describing castling maneuvers */
/* Row, ColRookFrom, ColKingFrom, ColRookTo, ColKingTo */
static int castling_matrix[4][5] = {
    { 0, 0, 4, 3, 2 },        /* 0-0-0, white */
    { 0, 7, 4, 5, 6 },        /* 0-0,   white */
    { 7, 0, 4, 3, 2 },        /* 0-0-0, black */
    { 7, 7, 4, 5, 6 }         /* 0-0,   black */
};

/* Checks whether castling occurred. If it did, *rrow and *rcol
   are set to the destination (row,col) of the rook that moved.
   
   Returns 1 if castling occurred, 0 if not.
   
   Note: Only handles a max of 1 castling move, so be sure
   to call too_many_diffs() first.
   */
static int check_castle_draw(newb, oldb, rrow, rcol)
     Board newb, oldb;
     int *rrow, *rcol;
{
    int i, *r, j;
    int match;

    /* For each type of castling... */
    for (i=0; i<4; ++i) {
      r = castling_matrix[i];

      /* Check the 4 squares involved in the castling move */
      match = 0;
      for (j=1; j<=4; ++j) {
          if (newb[r[0]][r[j]] == oldb[r[0]][r[j]]) {
            match = 1;
            break;
          }
      }

      if (!match) {
          /* All 4 changed, so it must be a castling move */
          *rrow = r[0];
          *rcol = r[3];
          return 1;
      }
    }
    return 0;
}

static int damage[BOARD_SIZE][BOARD_SIZE];

/*
 * event handler for redrawing the board
 */
void XDrawPosition(w, repaint, board)
     Widget w;
     /*Boolean*/int repaint;
     Board board;
{
    int i, j, do_flash;
    static int lastFlipView = 0;
    static int lastBoardValid = 0;
    static Board lastBoard;
    Arg args[16];
    int rrow, rcol;
    
    if (board == NULL) {
      if (!lastBoardValid) return;
      board = lastBoard;
    }
    if (!lastBoardValid || lastFlipView != flipView) {
      XtSetArg(args[0], XtNleftBitmap, (flipView ? xMarkPixmap : None));
      XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Flip View"),
                args, 1);
    }

    /*
     * It would be simpler to clear the window with XClearWindow()
     * but this causes a very distracting flicker.
     */
    
    if (!repaint && lastBoardValid && lastFlipView == flipView) {

      /* If too much changes (begin observing new game, etc.), don't
         do flashing */
      do_flash = too_many_diffs(board, lastBoard) ? 0 : 1;

      /* Special check for castling so we don't flash both the king
         and the rook (just flash the king). */
      if (do_flash) {
          if (check_castle_draw(board, lastBoard, &rrow, &rcol)) {
            /* Draw rook with NO flashing. King will be drawn flashing later */
            DrawSquare(rrow, rcol, board[rrow][rcol], 0);
            lastBoard[rrow][rcol] = board[rrow][rcol];
          }
      }

      /* First pass -- Draw (newly) empty squares and repair damage. 
         This prevents you from having a piece show up twice while it 
         is flashing on its new square */
      for (i = 0; i < BOARD_SIZE; i++)
        for (j = 0; j < BOARD_SIZE; j++)
          if ((board[i][j] != lastBoard[i][j] && board[i][j] == EmptySquare)
            || damage[i][j]) {
            DrawSquare(i, j, board[i][j], 0);
            damage[i][j] = False;
          }

      /* Second pass -- Draw piece(s) in new position and flash them */
      for (i = 0; i < BOARD_SIZE; i++)
        for (j = 0; j < BOARD_SIZE; j++)
          if (board[i][j] != lastBoard[i][j]) {
            DrawSquare(i, j, board[i][j], do_flash);    
          }
    } else {
      if (lineGap > 0)
        XDrawSegments(xDisplay, xBoardWindow, lineGC,
                  gridSegments, (BOARD_SIZE + 1) * 2);
      
      for (i = 0; i < BOARD_SIZE; i++)
        for (j = 0; j < BOARD_SIZE; j++) {
            DrawSquare(i, j, board[i][j], 0);
            damage[i][j] = False;
        }
    }

    CopyBoard(lastBoard, board);
    lastBoardValid = 1;
    lastFlipView = flipView;

    /* Draw highlights */
    if (pm1X >= 0 && pm1Y >= 0) {
      drawHighlight(pm1X, pm1Y, prelineGC);
    }
    if (pm2X >= 0 && pm2Y >= 0) {
      drawHighlight(pm2X, pm2Y, prelineGC);
    }
    if (hi1X >= 0 && hi1Y >= 0) {
      drawHighlight(hi1X, hi1Y, highlineGC);
    }
    if (hi2X >= 0 && hi2Y >= 0) {
      drawHighlight(hi2X, hi2Y, highlineGC);
    }

    /* If piece being dragged around board, must redraw that too */
    DrawDragPiece();

    XSync(xDisplay, False);
}


/*
 * event handler for redrawing the board
 */
void DrawPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    XDrawPosition(w, True, NULL);
}


/*
 * event handler for parsing user moves
 */
void HandleUserMove(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    int x, y;
    Boolean saveAnimate;
    static int second = 0;
      
    if (w != boardWidget || errorExitStatus != -1) return;

    if (event->type == ButtonPress) ErrorPopDown();

    if (promotionUp) {
      if (event->type == ButtonPress) {
          XtPopdown(promotionShell);
          XtDestroyWidget(promotionShell);
          promotionUp = False;
          ClearHighlights();
          fromX = fromY = -1;
      } else {
          return;
      }
    }
    
    x = EventToSquare(event->xbutton.x, BOARD_SIZE);
    y = EventToSquare(event->xbutton.y, BOARD_SIZE);
    if (!flipView && y >= 0) {
      y = BOARD_SIZE - 1 - y;
    }
    if (flipView && x >= 0) {
      x = BOARD_SIZE - 1 - x;
    }

    if (fromX == -1) {
      if (event->type == ButtonPress) {
          /* First square */ 
          if (OKToStartUserMove(x, y)) {
            fromX = x;
            fromY = y;
            second = 0;
            DragPieceBegin(event->xbutton.x, event->xbutton.y);
            if (appData.highlightDragging) {
                SetHighlights(x, y, -1, -1);
            }
          } 
      }
      return;
    }

    /* fromX != -1 */
    if (event->type == ButtonPress && gameMode != EditPosition &&
      x >= 0 && y >= 0) {
      ChessSquare fromP;
      ChessSquare toP;
      /* Check if clicking again on the same color piece */
      fromP = boards[currentMove][fromY][fromX];
      toP = boards[currentMove][y][x];
      if ((WhitePawn <= fromP && fromP <= WhiteKing &&
           WhitePawn <= toP && toP <= WhiteKing) ||
          (BlackPawn <= fromP && fromP <= BlackKing &&
           BlackPawn <= toP && toP <= BlackKing)) {
          /* Clicked again on same color piece -- changed his mind */
          second = (x == fromX && y == fromY);
          if (appData.highlightDragging) {
            SetHighlights(x, y, -1, -1);
          } else {
            ClearHighlights();
          }
          if (OKToStartUserMove(x, y)) {
            fromX = x;
            fromY = y;
            DragPieceBegin(event->xbutton.x, event->xbutton.y);
          }
          return;
      }
    }

    if (event->type == ButtonRelease &&   x == fromX && y == fromY) {
      DragPieceEnd(event->xbutton.x, event->xbutton.y);
      if (appData.animateDragging) {
          /* Undo animation damage if any */
          DrawPosition(FALSE, NULL);
      }
      if (second) {
          /* Second up/down in same square; just abort move */
          second = 0;
          fromX = fromY = -1;
          ClearHighlights();
          gotPremove = 0;
          ClearPremoveHighlights();
      } else {
          /* First upclick in same square; start click-click mode */
          SetHighlights(x, y, -1, -1);
      }
      return;
    } 

    /* Completed move */
    toX = x;
    toY = y;
    saveAnimate = appData.animate;
    if (event->type == ButtonPress) {
      /* Finish clickclick move */
      if (appData.animate || appData.highlightLastMove) {
          SetHighlights(fromX, fromY, toX, toY);
      } else {
          ClearHighlights();
      }
    } else {
      /* Finish drag move */
      if (appData.highlightLastMove) {
          SetHighlights(fromX, fromY, toX, toY);
      } else {
          ClearHighlights();
      }
      DragPieceEnd(event->xbutton.x, event->xbutton.y);
      /* Don't animate move and drag both */
      appData.animate = FALSE;
    }
    if (IsPromotion(fromX, fromY, toX, toY)) {
      if (appData.alwaysPromoteToQueen) {
          UserMoveEvent(fromX, fromY, toX, toY, 'q');
          if (!appData.highlightLastMove || gotPremove) ClearHighlights();
          if (gotPremove) SetPremoveHighlights(fromX, fromY, toX, toY);
          fromX = fromY = -1;
      } else {
          SetHighlights(fromX, fromY, toX, toY);
          PromotionPopUp();
      }
    } else {
      UserMoveEvent(fromX, fromY, toX, toY, NULLCHAR);
      if (!appData.highlightLastMove || gotPremove) ClearHighlights();
      if (gotPremove) SetPremoveHighlights(fromX, fromY, toX, toY);
      fromX = fromY = -1;
    }
    appData.animate = saveAnimate;
    if (appData.animate || appData.animateDragging) {
      /* Undo animation damage if needed */
      DrawPosition(FALSE, NULL);
    }
}

void AnimateUserMove (Widget w, XEvent * event,
                  String * params, Cardinal * nParams)
{
    DragPieceMove(event->xmotion.x, event->xmotion.y);
}

Widget CommentCreate(name, text, mutable, callback, lines)
     char *name, *text;
     int /*Boolean*/ mutable;
     XtCallbackProc callback;
     int lines;
{
    Arg args[16];
    Widget shell, layout, form, edit, b_ok, b_cancel, b_clear, b_close, b_edit;
    Dimension bw_width;
    int j;

    j = 0;
    XtSetArg(args[j], XtNwidth, &bw_width);  j++;
    XtGetValues(boardWidget, args, j);

    j = 0;
    XtSetArg(args[j], XtNresizable, True);  j++;
#if TOPLEVEL
    shell =
      XtCreatePopupShell(name, topLevelShellWidgetClass,
                   shellWidget, args, j);
#else
    shell =
      XtCreatePopupShell(name, transientShellWidgetClass,
                   shellWidget, args, j);
#endif
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, shell,
                      layoutArgs, XtNumber(layoutArgs));
    form =
      XtCreateManagedWidget("form", formWidgetClass, layout,
                      formArgs, XtNumber(formArgs));

    j = 0;
    if (mutable) {
      XtSetArg(args[j], XtNeditType, XawtextEdit);  j++;
      XtSetArg(args[j], XtNuseStringInPlace, False);  j++;
    }
    XtSetArg(args[j], XtNstring, text);  j++;
    XtSetArg(args[j], XtNtop, XtChainTop);  j++;
    XtSetArg(args[j], XtNbottom, XtChainBottom);  j++;
    XtSetArg(args[j], XtNleft, XtChainLeft);  j++;
    XtSetArg(args[j], XtNright, XtChainRight);  j++;
    XtSetArg(args[j], XtNresizable, True);  j++;
    XtSetArg(args[j], XtNwidth, bw_width);  j++; /*force wider than buttons*/
#if 0
    XtSetArg(args[j], XtNscrollVertical, XawtextScrollWhenNeeded);  j++;
#else
    /* !!Work around an apparent bug in XFree86 4.0.1 (X11R6.4.3) */
    XtSetArg(args[j], XtNscrollVertical, XawtextScrollAlways);  j++;
#endif
    XtSetArg(args[j], XtNautoFill, True);  j++;
    XtSetArg(args[j], XtNwrap, XawtextWrapWord); j++;
    edit =
      XtCreateManagedWidget("text", asciiTextWidgetClass, form, args, j);

    if (mutable) {
      j = 0;
      XtSetArg(args[j], XtNfromVert, edit);  j++;
      XtSetArg(args[j], XtNtop, XtChainBottom); j++;
      XtSetArg(args[j], XtNbottom, XtChainBottom); j++;
      XtSetArg(args[j], XtNleft, XtChainLeft); j++;
      XtSetArg(args[j], XtNright, XtChainLeft); j++;
      b_ok =
        XtCreateManagedWidget("ok", commandWidgetClass, form, args, j);
      XtAddCallback(b_ok, XtNcallback, callback, (XtPointer) 0);

      j = 0;
      XtSetArg(args[j], XtNfromVert, edit);  j++;
      XtSetArg(args[j], XtNfromHoriz, b_ok);  j++;
      XtSetArg(args[j], XtNtop, XtChainBottom); j++;
      XtSetArg(args[j], XtNbottom, XtChainBottom); j++;
      XtSetArg(args[j], XtNleft, XtChainLeft); j++;
      XtSetArg(args[j], XtNright, XtChainLeft); j++;
      b_cancel =
        XtCreateManagedWidget("cancel", commandWidgetClass, form, args, j);
      XtAddCallback(b_cancel, XtNcallback, callback, (XtPointer) 0);

      j = 0;
      XtSetArg(args[j], XtNfromVert, edit);  j++;
      XtSetArg(args[j], XtNfromHoriz, b_cancel);  j++;
      XtSetArg(args[j], XtNtop, XtChainBottom); j++;
      XtSetArg(args[j], XtNbottom, XtChainBottom); j++;
      XtSetArg(args[j], XtNleft, XtChainLeft); j++;
      XtSetArg(args[j], XtNright, XtChainLeft); j++;
      b_clear =
        XtCreateManagedWidget("clear", commandWidgetClass, form, args, j);
      XtAddCallback(b_clear, XtNcallback, callback, (XtPointer) 0);
    } else {
      j = 0;
      XtSetArg(args[j], XtNfromVert, edit);  j++;
      XtSetArg(args[j], XtNtop, XtChainBottom); j++;
      XtSetArg(args[j], XtNbottom, XtChainBottom); j++;
      XtSetArg(args[j], XtNleft, XtChainLeft); j++;
      XtSetArg(args[j], XtNright, XtChainLeft); j++;
      b_close =
        XtCreateManagedWidget("close", commandWidgetClass, form, args, j);
      XtAddCallback(b_close, XtNcallback, callback, (XtPointer) 0);

      j = 0;
      XtSetArg(args[j], XtNfromVert, edit);  j++;
      XtSetArg(args[j], XtNfromHoriz, b_close);  j++;
      XtSetArg(args[j], XtNtop, XtChainBottom); j++;
      XtSetArg(args[j], XtNbottom, XtChainBottom); j++;
      XtSetArg(args[j], XtNleft, XtChainLeft); j++;
      XtSetArg(args[j], XtNright, XtChainLeft); j++;
      b_edit =
        XtCreateManagedWidget("edit", commandWidgetClass, form, args, j);
      XtAddCallback(b_edit, XtNcallback, callback, (XtPointer) 0);
    }

    XtRealizeWidget(shell);

    if (commentX == -1) {
      int xx, yy;
      Window junk;
      Dimension pw_height;
      Dimension ew_height;

      j = 0;
      XtSetArg(args[j], XtNheight, &ew_height);  j++;
      XtGetValues(edit, args, j);

      j = 0;
      XtSetArg(args[j], XtNheight, &pw_height);  j++;
      XtGetValues(shell, args, j);
      commentH = pw_height + (lines - 1) * ew_height;
      commentW = bw_width - 16;

      XSync(xDisplay, False);
#ifdef NOTDEF
      /* This code seems to tickle an X bug if it is executed too soon
         after xboard starts up.  The coordinates get transformed as if
         the main window was positioned at (0, 0).
         */
      XtTranslateCoords(shellWidget,
                    (bw_width - commentW) / 2, 0 - commentH / 2,
                    &commentX, &commentY);
#else  /*!NOTDEF*/
        XTranslateCoordinates(xDisplay, XtWindow(shellWidget),
                        RootWindowOfScreen(XtScreen(shellWidget)),
                        (bw_width - commentW) / 2, 0 - commentH / 2,
                        &xx, &yy, &junk);
      commentX = xx;
      commentY = yy;
#endif /*!NOTDEF*/
      if (commentY < 0) commentY = 0; /*avoid positioning top offscreen*/
    }
    j = 0;
    XtSetArg(args[j], XtNheight, commentH);  j++;
    XtSetArg(args[j], XtNwidth, commentW);  j++;
    XtSetArg(args[j], XtNx, commentX);  j++;
    XtSetArg(args[j], XtNy, commentY);  j++;
    XtSetValues(shell, args, j);
    XtSetKeyboardFocus(shell, edit);

    return shell;
}

/* Used for analysis window and ICS input window */
Widget MiscCreate(name, text, mutable, callback, lines)
     char *name, *text;
     int /*Boolean*/ mutable;
     XtCallbackProc callback;
     int lines;
{
    Arg args[16];
    Widget shell, layout, form, edit;
    Position x, y;
    Dimension bw_width, pw_height, ew_height, w, h;
    int j;
    int xx, yy;
    Window junk;

    j = 0;
    XtSetArg(args[j], XtNresizable, True);  j++;
#if TOPLEVEL
    shell =
      XtCreatePopupShell(name, topLevelShellWidgetClass,
                   shellWidget, args, j);
#else
    shell =
      XtCreatePopupShell(name, transientShellWidgetClass,
                   shellWidget, args, j);
#endif
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, shell,
                      layoutArgs, XtNumber(layoutArgs));
    form =
      XtCreateManagedWidget("form", formWidgetClass, layout,
                      formArgs, XtNumber(formArgs));

    j = 0;
    if (mutable) {
      XtSetArg(args[j], XtNeditType, XawtextEdit);  j++;
      XtSetArg(args[j], XtNuseStringInPlace, False);  j++;
    }
    XtSetArg(args[j], XtNstring, text);  j++;
    XtSetArg(args[j], XtNtop, XtChainTop);  j++;
    XtSetArg(args[j], XtNbottom, XtChainBottom);  j++;
    XtSetArg(args[j], XtNleft, XtChainLeft);  j++;
    XtSetArg(args[j], XtNright, XtChainRight);  j++;
    XtSetArg(args[j], XtNresizable, True);  j++;
#if 0
    XtSetArg(args[j], XtNscrollVertical, XawtextScrollWhenNeeded);  j++;
#else
    /* !!Work around an apparent bug in XFree86 4.0.1 (X11R6.4.3) */
    XtSetArg(args[j], XtNscrollVertical, XawtextScrollAlways);  j++;
#endif
    XtSetArg(args[j], XtNautoFill, True);  j++;
    XtSetArg(args[j], XtNwrap, XawtextWrapWord); j++;
    edit =
      XtCreateManagedWidget("text", asciiTextWidgetClass, form, args, j);

    XtRealizeWidget(shell);

    j = 0;
    XtSetArg(args[j], XtNwidth, &bw_width);  j++;
    XtGetValues(boardWidget, args, j);

    j = 0;
    XtSetArg(args[j], XtNheight, &ew_height);  j++;
    XtGetValues(edit, args, j);

    j = 0;
    XtSetArg(args[j], XtNheight, &pw_height);  j++;
    XtGetValues(shell, args, j);
    h = pw_height + (lines - 1) * ew_height;
    w = bw_width - 16;

    XSync(xDisplay, False);
#ifdef NOTDEF
    /* This code seems to tickle an X bug if it is executed too soon
       after xboard starts up.  The coordinates get transformed as if
       the main window was positioned at (0, 0).
    */
    XtTranslateCoords(shellWidget, (bw_width - w) / 2, 0 - h / 2, &x, &y);
#else  /*!NOTDEF*/
    XTranslateCoordinates(xDisplay, XtWindow(shellWidget),
                    RootWindowOfScreen(XtScreen(shellWidget)),
                    (bw_width - w) / 2, 0 - h / 2, &xx, &yy, &junk);
#endif /*!NOTDEF*/
    x = xx;
    y = yy;
    if (y < 0) y = 0; /*avoid positioning top offscreen*/

    j = 0;
    XtSetArg(args[j], XtNheight, h);  j++;
    XtSetArg(args[j], XtNwidth, w);  j++;
    XtSetArg(args[j], XtNx, x);  j++;
    XtSetArg(args[j], XtNy, y);  j++;
    XtSetValues(shell, args, j);

    return shell;
}


static int savedIndex;  /* gross that this is global */

void EditCommentPopUp(index, title, text)
     int index;
     char *title, *text;
{
    Widget edit;
    Arg args[16];
    int j;

    savedIndex = index;
    if (text == NULL) text = "";

    if (editShell == NULL) {
      editShell =
        CommentCreate(title, text, True, EditCommentCallback, 4); 
      XtRealizeWidget(editShell);
      CatchDeleteWindow(editShell, "EditCommentPopDown");
    } else {
      edit = XtNameToWidget(editShell, "*form.text");
      j = 0;
      XtSetArg(args[j], XtNstring, text); j++;
      XtSetValues(edit, args, j);
      j = 0;
      XtSetArg(args[j], XtNiconName, (XtArgVal) title);   j++;
      XtSetArg(args[j], XtNtitle, (XtArgVal) title);      j++;
      XtSetValues(editShell, args, j);
    }

    XtPopup(editShell, XtGrabNone);

    editUp = True;
    j = 0;
    XtSetArg(args[j], XtNleftBitmap, xMarkPixmap); j++;
    XtSetValues(XtNameToWidget(menuBarWidget, "menuMode.Edit Comment"),
            args, j);
}

void EditCommentCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    String name, val;
    Arg args[16];
    int j;
    Widget edit;

    j = 0;
    XtSetArg(args[j], XtNlabel, &name);  j++;
    XtGetValues(w, args, j);

    if (strcmp(name, "ok") == 0) {
      edit = XtNameToWidget(editShell, "*form.text");
      j = 0;
      XtSetArg(args[j], XtNstring, &val); j++;
      XtGetValues(edit, args, j);
      ReplaceComment(savedIndex, val);
      EditCommentPopDown();
    } else if (strcmp(name, "cancel") == 0) {
      EditCommentPopDown();
    } else if (strcmp(name, "clear") == 0) {
      edit = XtNameToWidget(editShell, "*form.text");
      XtCallActionProc(edit, "select-all", NULL, NULL, 0);
      XtCallActionProc(edit, "kill-selection", NULL, NULL, 0);
    }
}

void EditCommentPopDown()
{
    Arg args[16];
    int j;

    if (!editUp) return;
    j = 0;
    XtSetArg(args[j], XtNx, &commentX); j++;
    XtSetArg(args[j], XtNy, &commentY); j++;
    XtSetArg(args[j], XtNheight, &commentH); j++;
    XtSetArg(args[j], XtNwidth, &commentW); j++;
    XtGetValues(editShell, args, j);
    XtPopdown(editShell);
    editUp = False;
    j = 0;
    XtSetArg(args[j], XtNleftBitmap, None); j++;
    XtSetValues(XtNameToWidget(menuBarWidget, "menuMode.Edit Comment"),
            args, j);
}

void ICSInputBoxPopUp()
{
    Widget edit;
    Arg args[16];
    int j;
    char *title = "ICS Input";
    XtTranslations tr;
      
    if (ICSInputShell == NULL) {
      ICSInputShell = MiscCreate(title, "", True, NULL, 1);
      tr = XtParseTranslationTable(ICSInputTranslations);
      edit = XtNameToWidget(ICSInputShell, "*form.text");
      XtOverrideTranslations(edit, tr);
      XtRealizeWidget(ICSInputShell);
      CatchDeleteWindow(ICSInputShell, "ICSInputBoxPopDown");
      
    } else {
      edit = XtNameToWidget(ICSInputShell, "*form.text");
      j = 0;
      XtSetArg(args[j], XtNstring, ""); j++;
      XtSetValues(edit, args, j);
      j = 0;
      XtSetArg(args[j], XtNiconName, (XtArgVal) title);   j++;
      XtSetArg(args[j], XtNtitle, (XtArgVal) title);      j++;
      XtSetValues(ICSInputShell, args, j);
    }

    XtPopup(ICSInputShell, XtGrabNone);
    XtSetKeyboardFocus(ICSInputShell, edit);

    ICSInputBoxUp = True;
    j = 0;
    XtSetArg(args[j], XtNleftBitmap, xMarkPixmap); j++;
    XtSetValues(XtNameToWidget(menuBarWidget, "menuMode.ICS Input Box"),
            args, j);
}

void ICSInputSendText()
{
    Widget edit;
    int j;
    Arg args[16];
    String val;
  
    edit = XtNameToWidget(ICSInputShell, "*form.text");
    j = 0;
    XtSetArg(args[j], XtNstring, &val); j++;
    XtGetValues(edit, args, j);
    SendMultiLineToICS(val);
    XtCallActionProc(edit, "select-all", NULL, NULL, 0);
    XtCallActionProc(edit, "kill-selection", NULL, NULL, 0);
}

void ICSInputBoxPopDown()
{
    Arg args[16];
    int j;

    if (!ICSInputBoxUp) return;
    j = 0;
    XtPopdown(ICSInputShell);
    ICSInputBoxUp = False;
    j = 0;
    XtSetArg(args[j], XtNleftBitmap, None); j++;
    XtSetValues(XtNameToWidget(menuBarWidget, "menuMode.ICS Input Box"),
            args, j);
}

void CommentPopUp(title, text)
     char *title, *text;
{
    Arg args[16];
    int j;
    Widget edit;

    if (commentShell == NULL) {
      commentShell =
        CommentCreate(title, text, False, CommentCallback, 4);
      XtRealizeWidget(commentShell);
      CatchDeleteWindow(commentShell, "CommentPopDown");
    } else {
      edit = XtNameToWidget(commentShell, "*form.text");
      j = 0;
      XtSetArg(args[j], XtNstring, text); j++;
      XtSetValues(edit, args, j);
      j = 0;
      XtSetArg(args[j], XtNiconName, (XtArgVal) title);   j++;
      XtSetArg(args[j], XtNtitle, (XtArgVal) title);      j++;
      XtSetValues(commentShell, args, j);
    }

    XtPopup(commentShell, XtGrabNone);
    XSync(xDisplay, False);

    commentUp = True;
}

void AnalysisPopUp(title, text)
     char *title, *text;
{
    Arg args[16];
    int j;
    Widget edit;

    if (analysisShell == NULL) {
      analysisShell = MiscCreate(title, text, False, NULL, 4);
      XtRealizeWidget(analysisShell);
      CatchDeleteWindow(analysisShell, "AnalysisPopDown");

    } else {
      edit = XtNameToWidget(analysisShell, "*form.text");
      j = 0;
      XtSetArg(args[j], XtNstring, text); j++;
      XtSetValues(edit, args, j);
      j = 0;
      XtSetArg(args[j], XtNiconName, (XtArgVal) title);   j++;
      XtSetArg(args[j], XtNtitle, (XtArgVal) title);      j++;
      XtSetValues(analysisShell, args, j);
    }

    if (!analysisUp) {
      XtPopup(analysisShell, XtGrabNone);
    }
    XSync(xDisplay, False);

    analysisUp = True;
}

void CommentCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    String name;
    Arg args[16];
    int j;

    j = 0;
    XtSetArg(args[j], XtNlabel, &name);  j++;
    XtGetValues(w, args, j);

    if (strcmp(name, "close") == 0) {
      CommentPopDown();
    } else if (strcmp(name, "edit") == 0) {
      CommentPopDown();
      EditCommentEvent();
    }
}


void CommentPopDown()
{
    Arg args[16];
    int j;

    if (!commentUp) return;
    j = 0;
    XtSetArg(args[j], XtNx, &commentX); j++;
    XtSetArg(args[j], XtNy, &commentY); j++;
    XtSetArg(args[j], XtNwidth, &commentW); j++;
    XtSetArg(args[j], XtNheight, &commentH); j++;
    XtGetValues(commentShell, args, j);
    XtPopdown(commentShell);
    XSync(xDisplay, False);
    commentUp = False;
}

void AnalysisPopDown()
{
    if (!analysisUp) return;
    XtPopdown(analysisShell);
    XSync(xDisplay, False);
    analysisUp = False;
}


void FileNamePopUp(label, def, proc, openMode)
     char *label;
     char *def;
     FileProc proc;
     char *openMode;
{
    Arg args[16];
    Widget popup, layout, dialog, edit;
    Window root, child;
    int x, y, i;
    int win_x, win_y;
    unsigned int mask;
    
    fileProc = proc;          /* I can't see a way not */
    fileOpenMode = openMode;  /*   to use globals here */
    
    i = 0;
    XtSetArg(args[i], XtNresizable, True); i++;
    XtSetArg(args[i], XtNwidth, DIALOG_SIZE); i++;
    fileNameShell = popup =
      XtCreatePopupShell("File name prompt", transientShellWidgetClass,
                   shellWidget, args, i);
    
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, popup,
                      layoutArgs, XtNumber(layoutArgs));
  
    i = 0;
    XtSetArg(args[i], XtNlabel, label); i++;
    XtSetArg(args[i], XtNvalue, def); i++;
    XtSetArg(args[i], XtNborderWidth, 0); i++;
    dialog = XtCreateManagedWidget("fileName", dialogWidgetClass,
                           layout, args, i);
    
    XawDialogAddButton(dialog, "ok", FileNameCallback, (XtPointer) dialog);
    XawDialogAddButton(dialog, "cancel", FileNameCallback,
                   (XtPointer) dialog);
    
    XtRealizeWidget(popup);
    CatchDeleteWindow(popup, "FileNamePopDown");
    
    XQueryPointer(xDisplay, xBoardWindow, &root, &child,
              &x, &y, &win_x, &win_y, &mask);
    
    XtSetArg(args[0], XtNx, x - 10);
    XtSetArg(args[1], XtNy, y - 30);
    XtSetValues(popup, args, 2);
    
    XtPopup(popup, XtGrabExclusive);
    filenameUp = True;
    
    edit = XtNameToWidget(dialog, "*value");
    XtSetKeyboardFocus(popup, edit);
}

void FileNamePopDown()
{
    if (!filenameUp) return;
    XtPopdown(fileNameShell);
    XtDestroyWidget(fileNameShell);
    filenameUp = False;
    ModeHighlight();
}

void FileNameCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    String name;
    Arg args[16];
    
    XtSetArg(args[0], XtNlabel, &name);
    XtGetValues(w, args, 1);
    
    if (strcmp(name, "cancel") == 0) {
        FileNamePopDown();
        return;
    }
    
    FileNameAction(w, NULL, NULL, NULL);
}

void FileNameAction(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    char buf[MSG_SIZ];
    String name;
    FILE *f;
    char *p, *fullname;
    int index;

    name = XawDialogGetValueString(w = XtParent(w));
    
    if ((name != NULL) && (*name != NULLCHAR)) {
      strcpy(buf, name);
      XtPopdown(w = XtParent(XtParent(w)));
      XtDestroyWidget(w);
      filenameUp = False;

      p = strrchr(buf, ' ');
      if (p == NULL) {
          index = 0;
      } else {
          *p++ = NULLCHAR;
          index = atoi(p);
      }
      fullname = ExpandPathName(buf);
      if (!fullname) {
          ErrorPopUp("Error", "Can't open file", FALSE);
      }
      else {
          f = fopen(fullname, fileOpenMode);
          if (f == NULL) {
            DisplayError("Failed to open file", errno);
          } else {
            (void) (*fileProc)(f, index, buf);
          }
      }
      ModeHighlight();
      return;
    }
    
    XtPopdown(w = XtParent(XtParent(w)));
    XtDestroyWidget(w);
    filenameUp = False;
    ModeHighlight();
}

void PromotionPopUp()
{
    Arg args[16];
    Widget dialog, layout;
    Position x, y;
    Dimension bw_width, pw_width;
    int j;

    j = 0;
    XtSetArg(args[j], XtNwidth, &bw_width); j++;
    XtGetValues(boardWidget, args, j);
    
    j = 0;
    XtSetArg(args[j], XtNresizable, True); j++;
    promotionShell =
      XtCreatePopupShell("Promotion", transientShellWidgetClass,
                   shellWidget, args, j);
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, promotionShell,
                      layoutArgs, XtNumber(layoutArgs));
    
    j = 0;
    XtSetArg(args[j], XtNlabel, "Promote pawn to what?"); j++;
    XtSetArg(args[j], XtNborderWidth, 0); j++;
    dialog = XtCreateManagedWidget("promotion", dialogWidgetClass,
                           layout, args, j);
    
    XawDialogAddButton(dialog, "Queen", PromotionCallback, 
                   (XtPointer) dialog);
    XawDialogAddButton(dialog, "Rook", PromotionCallback, 
                   (XtPointer) dialog);
    XawDialogAddButton(dialog, "Bishop", PromotionCallback, 
                   (XtPointer) dialog);
    XawDialogAddButton(dialog, "Knight", PromotionCallback, 
                   (XtPointer) dialog);
    if (!appData.testLegality || gameInfo.variant == VariantSuicide) {
      XawDialogAddButton(dialog, "King", PromotionCallback, 
                     (XtPointer) dialog);
    }
    XawDialogAddButton(dialog, "cancel", PromotionCallback, 
                   (XtPointer) dialog);
    
    XtRealizeWidget(promotionShell);
    CatchDeleteWindow(promotionShell, "PromotionPopDown");
    
    j = 0;
    XtSetArg(args[j], XtNwidth, &pw_width); j++;
    XtGetValues(promotionShell, args, j);
    
    XtTranslateCoords(boardWidget, (bw_width - pw_width) / 2,
                  lineGap + squareSize/3 +
                  ((toY == 7) ^ (flipView) ?
                   0 : 6*(squareSize + lineGap)), &x, &y);
    
    j = 0;
    XtSetArg(args[j], XtNx, x); j++;
    XtSetArg(args[j], XtNy, y); j++;
    XtSetValues(promotionShell, args, j);
    
    XtPopup(promotionShell, XtGrabNone);
    
    promotionUp = True;
}

void PromotionPopDown()
{
    if (!promotionUp) return;
    XtPopdown(promotionShell);
    XtDestroyWidget(promotionShell);
    promotionUp = False;
}

void PromotionCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    String name;
    Arg args[16];
    int promoChar;
    
    XtSetArg(args[0], XtNlabel, &name);
    XtGetValues(w, args, 1);
    
    PromotionPopDown();
    
    if (fromX == -1) return;
    
    if (strcmp(name, "cancel") == 0) {
      fromX = fromY = -1;
      ClearHighlights();
      return;
    } else if (strcmp(name, "Knight") == 0) {
      promoChar = 'n';
    } else {
      promoChar = ToLower(name[0]);
    }

    UserMoveEvent(fromX, fromY, toX, toY, promoChar);

    if (!appData.highlightLastMove || gotPremove) ClearHighlights();
    if (gotPremove) SetPremoveHighlights(fromX, fromY, toX, toY);
    fromX = fromY = -1;
}


void ErrorCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    errorUp = False;
    XtPopdown(w = XtParent(XtParent(XtParent(w))));
    XtDestroyWidget(w);
    if (errorExitStatus != -1) ExitEvent(errorExitStatus);
}


void ErrorPopDown()
{
    if (!errorUp) return;
    errorUp = False;
    XtPopdown(errorShell);
    XtDestroyWidget(errorShell);
    if (errorExitStatus != -1) ExitEvent(errorExitStatus);
}

void ErrorPopUp(title, label, modal)
     char *title, *label;
     int modal;
{
    Arg args[16];
    Widget dialog, layout;
    Position x, y;
    int xx, yy;
    Window junk;
    Dimension bw_width, pw_width;
    Dimension pw_height;
    int i;
    
    i = 0;
    XtSetArg(args[i], XtNresizable, True);  i++;
    XtSetArg(args[i], XtNtitle, title); i++;
    errorShell = 
      XtCreatePopupShell("errorpopup", transientShellWidgetClass,
                   shellWidget, args, i);
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, errorShell,
                      layoutArgs, XtNumber(layoutArgs));
    
    i = 0;
    XtSetArg(args[i], XtNlabel, label); i++;
    XtSetArg(args[i], XtNborderWidth, 0); i++;
    dialog = XtCreateManagedWidget("dialog", dialogWidgetClass,
                           layout, args, i);
    
    XawDialogAddButton(dialog, "ok", ErrorCallback, (XtPointer) dialog);
    
    XtRealizeWidget(errorShell);
    CatchDeleteWindow(errorShell, "ErrorPopDown");
    
    i = 0;
    XtSetArg(args[i], XtNwidth, &bw_width);  i++;
    XtGetValues(boardWidget, args, i);
    i = 0;
    XtSetArg(args[i], XtNwidth, &pw_width);  i++;
    XtSetArg(args[i], XtNheight, &pw_height);  i++;
    XtGetValues(errorShell, args, i);

#ifdef NOTDEF
    /* This code seems to tickle an X bug if it is executed too soon
       after xboard starts up.  The coordinates get transformed as if
       the main window was positioned at (0, 0).
       */
    XtTranslateCoords(boardWidget, (bw_width - pw_width) / 2,
                  0 - pw_height + squareSize / 3, &x, &y);
#else
    XTranslateCoordinates(xDisplay, XtWindow(boardWidget),
                    RootWindowOfScreen(XtScreen(boardWidget)),
                    (bw_width - pw_width) / 2,
                    0 - pw_height + squareSize / 3, &xx, &yy, &junk);
    x = xx;
    y = yy;
#endif
    if (y < 0) y = 0; /*avoid positioning top offscreen*/

    i = 0;
    XtSetArg(args[i], XtNx, x);  i++;
    XtSetArg(args[i], XtNy, y);  i++;
    XtSetValues(errorShell, args, i);

    errorUp = True;
    XtPopup(errorShell, modal ? XtGrabExclusive : XtGrabNone);
}

/* Disable all user input other than deleting the window */
static int frozen = 0;
void FreezeUI()
{
  if (frozen) return;
  /* Grab by a widget that doesn't accept input */
  XtAddGrab(messageWidget, TRUE, FALSE);
  frozen = 1;
}

/* Undo a FreezeUI */
void ThawUI()
{
  if (!frozen) return;
  XtRemoveGrab(messageWidget);
  frozen = 0;
}

char *ModeToWidgetName(mode)
     GameMode mode;
{
    switch (mode) {
      case BeginningOfGame:
      if (appData.icsActive)
        return "menuMode.ICS Client";
      else if (appData.noChessProgram ||
             *appData.cmailGameName != NULLCHAR)
        return "menuMode.Edit Game";
      else
        return "menuMode.Machine Black";
      case MachinePlaysBlack:
      return "menuMode.Machine Black";
      case MachinePlaysWhite:
      return "menuMode.Machine White";
      case AnalyzeMode:
      return "menuMode.Analysis Mode";
      case AnalyzeFile:
      return "menuMode.Analyze File";
      case TwoMachinesPlay:
      return "menuMode.Two Machines";
      case EditGame:
      return "menuMode.Edit Game";
      case PlayFromGameFile:
      return "menuFile.Load Game";
      case EditPosition:
      return "menuMode.Edit Position";
      case Training:
      return "menuMode.Training";
      case IcsPlayingWhite:
      case IcsPlayingBlack:
      case IcsObserving:
      case IcsIdle:
      case IcsExamining:
      return "menuMode.ICS Client";
      default:
      case EndOfGame:
      return NULL;
    }
}     

void ModeHighlight()
{
    Arg args[16];
    static int oldPausing = FALSE;
    static GameMode oldmode = (GameMode) -1;
    char *wname;
    
    if (!boardWidget || !XtIsRealized(boardWidget)) return;

    if (pausing != oldPausing) {
      oldPausing = pausing;
      if (pausing) {
          XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
      } else {
          XtSetArg(args[0], XtNleftBitmap, None);
      }
      XtSetValues(XtNameToWidget(menuBarWidget, "menuMode.Pause"),
                args, 1);

      if (appData.showButtonBar) {
#if 0
        if (pausing) {
          XtSetArg(args[0], XtNbackground, buttonForegroundPixel);
          XtSetArg(args[1], XtNforeground, buttonBackgroundPixel);
        } else {
          XtSetArg(args[0], XtNbackground, buttonBackgroundPixel);
          XtSetArg(args[1], XtNforeground, buttonForegroundPixel);
        }
#else
        /* Always toggle, don't set.  Previous code messes up when
           invoked while the button is pressed, as releasing it
           toggles the state again. */
        {
          Pixel oldbg, oldfg;
          XtSetArg(args[0], XtNbackground, &oldbg);
          XtSetArg(args[1], XtNforeground, &oldfg);
          XtGetValues(XtNameToWidget(buttonBarWidget, PAUSE_BUTTON),
                  args, 2);
          XtSetArg(args[0], XtNbackground, oldfg);
          XtSetArg(args[1], XtNforeground, oldbg);
        }
#endif
        XtSetValues(XtNameToWidget(buttonBarWidget, PAUSE_BUTTON), args, 2);
      }
    }

    wname = ModeToWidgetName(oldmode);
    if (wname != NULL) {
      XtSetArg(args[0], XtNleftBitmap, None);
      XtSetValues(XtNameToWidget(menuBarWidget, wname), args, 1);
    }
    wname = ModeToWidgetName(gameMode);
    if (wname != NULL) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
      XtSetValues(XtNameToWidget(menuBarWidget, wname), args, 1);
    }
    oldmode = gameMode;

    /* Maybe all the enables should be handled here, not just this one */
    XtSetSensitive(XtNameToWidget(menuBarWidget, "menuMode.Training"),
               gameMode == Training || gameMode == PlayFromGameFile);
}


/*
 * Button/menu procedures
 */
void ResetProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ResetGameEvent();
    AnalysisPopDown();
}

int LoadGamePopUp(f, gameNumber, title)
     FILE *f;
     int gameNumber;
     char *title;
{
    cmailMsgLoaded = FALSE;
    if (gameNumber == 0) {
      int error = GameListBuild(f);
      if (error) {
          DisplayError("Cannot build game list", error);
      } else if (!ListEmpty(&gameList) &&
               ((ListGame *) gameList.tailPred)->number > 1) {
          GameListPopUp(f, title);
          return TRUE;
      }
      GameListDestroy();
      gameNumber = 1;
    }
    return LoadGame(f, gameNumber, title, FALSE);
}

void LoadGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
      Reset(FALSE, TRUE);
    }
    FileNamePopUp("Load game file name?", "", LoadGamePopUp, "r");
}

void LoadNextGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadGame(1);
}

void LoadPrevGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadGame(-1);
}

void ReloadGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadGame(0);
}

void LoadNextPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadPosition(1);
}

void LoadPrevPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadPosition(-1);
}

void ReloadPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadPosition(0);
}

void LoadPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
      Reset(FALSE, TRUE);
    }
    FileNamePopUp("Load position file name?", "", LoadPosition, "r");
}

void SaveGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    FileNamePopUp("Save game file name?",
              DefaultFileName(appData.oldSaveStyle ? "game" : "pgn"),
              SaveGame, "a");
}

void SavePositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    FileNamePopUp("Save position file name?",
              DefaultFileName(appData.oldSaveStyle ? "pos" : "fen"),
              SavePosition, "a");
}

void ReloadCmailMsgProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ReloadCmailMsgEvent(FALSE);
}

void MailMoveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    MailMoveEvent();
}

/* this variable is shared between CopyPositionProc and SendPositionSelection */
static char *selected_fen_position=NULL;

static Boolean
SendPositionSelection(Widget w, Atom *selection, Atom *target,
             Atom *type_return, XtPointer *value_return,
             unsigned long *length_return, int *format_return)
{
  char *selection_tmp;

  if (!selected_fen_position) return False; /* should never happen */
  if (*target == XA_STRING){
    /* note: since no XtSelectionDoneProc was registered, Xt will
     * automatically call XtFree on the value returned.  So have to
     * make a copy of it allocated with XtMalloc */
    selection_tmp= XtMalloc(strlen(selected_fen_position)+16);
    strcpy(selection_tmp, selected_fen_position);

    *value_return=selection_tmp;
    *length_return=strlen(selection_tmp);
    *type_return=XA_STRING;
    *format_return = 8; /* bits per byte */
    return True;
  } else {
    return False;
  } 
}

/* note: when called from menu all parameters are NULL, so no clue what the
 * Widget which was clicked on was, or what the click event was
 */
void CopyPositionProc(w, event, prms, nprms)
  Widget w;
  XEvent *event;
  String *prms;
  Cardinal *nprms;
  {
    int ret;

    if (selected_fen_position) free(selected_fen_position);
    selected_fen_position = (char *)PositionToFEN(currentMove);
    if (!selected_fen_position) return;
    ret = XtOwnSelection(menuBarWidget, XA_PRIMARY,
                   CurrentTime,
                   SendPositionSelection,
                   NULL/* lose_ownership_proc */ ,
                   NULL/* transfer_done_proc */);
    if (!ret) {
      free(selected_fen_position);
      selected_fen_position=NULL;
    }
  }

/* function called when the data to Paste is ready */
static void
PastePositionCB(Widget w, XtPointer client_data, Atom *selection,
         Atom *type, XtPointer value, unsigned long *len, int *format)
{
  char *fenstr=value;
  if (value==NULL || *len==0) return; /* nothing had been selected to copy */
  fenstr[*len]='\0'; /* normally this string is terminated, but be safe */
  EditPositionPasteFEN(fenstr);
  XtFree(value);
}

/* called when Paste Position button is pressed,
 * all parameters will be NULL */
void PastePositionProc(w, event, prms, nprms)
  Widget w;
  XEvent *event;
  String *prms;
  Cardinal *nprms;
{
    XtGetSelectionValue(menuBarWidget, XA_PRIMARY, XA_STRING,
      /* (XtSelectionCallbackProc) */ PastePositionCB,
      NULL, /* client_data passed to PastePositionCB */

      /* better to use the time field from the event that triggered the
       * call to this function, but that isn't trivial to get
       */
      CurrentTime
    );
    return;
}

static Boolean
SendGameSelection(Widget w, Atom *selection, Atom *target,
              Atom *type_return, XtPointer *value_return,
              unsigned long *length_return, int *format_return)
{
  char *selection_tmp;

  if (*target == XA_STRING){
    FILE* f = fopen(gameCopyFilename, "r");
    long len;
    size_t count;
    if (f == NULL) return False;
    fseek(f, 0, 2);
    len = ftell(f);
    rewind(f);
    selection_tmp = XtMalloc(len + 1);
    count = fread(selection_tmp, 1, len, f);
    if (len != count) {
      XtFree(selection_tmp);
      return False;
    }
    selection_tmp[len] = NULLCHAR;
    *value_return = selection_tmp;
    *length_return = len;
    *type_return = XA_STRING;
    *format_return = 8; /* bits per byte */
    return True;
  } else {
    return False;
  } 
}

/* note: when called from menu all parameters are NULL, so no clue what the
 * Widget which was clicked on was, or what the click event was
 */
void CopyGameProc(w, event, prms, nprms)
  Widget w;
  XEvent *event;
  String *prms;
  Cardinal *nprms;
{
  int ret;

  ret = SaveGameToFile(gameCopyFilename, FALSE);
  if (!ret) return;

  ret = XtOwnSelection(menuBarWidget, XA_PRIMARY,
                   CurrentTime,
                   SendGameSelection,
                   NULL/* lose_ownership_proc */ ,
                   NULL/* transfer_done_proc */);
}

/* function called when the data to Paste is ready */
static void
PasteGameCB(Widget w, XtPointer client_data, Atom *selection,
          Atom *type, XtPointer value, unsigned long *len, int *format)
{
  FILE* f;
  if (value == NULL || *len == 0) {
    return; /* nothing had been selected to copy */
  }
  f = fopen(gamePasteFilename, "w");
  if (f == NULL) {
    DisplayError("Can't open temp file", errno);
    return;
  }
  fwrite(value, 1, *len, f);
  fclose(f);
  XtFree(value);
  LoadGameFromFile(gamePasteFilename, 0, gamePasteFilename, FALSE);
}

/* called when Paste Game button is pressed,
 * all parameters will be NULL */
void PasteGameProc(w, event, prms, nprms)
  Widget w;
  XEvent *event;
  String *prms;
  Cardinal *nprms;
{
    XtGetSelectionValue(menuBarWidget, XA_PRIMARY, XA_STRING,
      /* (XtSelectionCallbackProc) */ PasteGameCB,
      NULL, /* client_data passed to PasteGameCB */

      /* better to use the time field from the event that triggered the
       * call to this function, but that isn't trivial to get
       */
      CurrentTime
    );
    return;
}


void AutoSaveGame()
{
    SaveGameProc(NULL, NULL, NULL, NULL);
}


void QuitProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ExitEvent(0);
}

void PauseProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    PauseEvent();
}


void MachineBlackProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    MachineBlackEvent();
}

void MachineWhiteProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    MachineWhiteEvent();
}

void AnalyzeModeProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (!first.analysisSupport) {
      char buf[MSG_SIZ];
      sprintf(buf, "%s does not support analysis", first.tidy);
      DisplayError(buf, 0);
      return;
    }
    if (!appData.showThinking)
      ShowThinkingProc(w,event,prms,nprms);

    AnalyzeModeEvent();
}

void AnalyzeFileProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (!first.analysisSupport) {
      char buf[MSG_SIZ];
      sprintf(buf, "%s does not support analysis", first.tidy);
      DisplayError(buf, 0);
      return;
    }
    Reset(FALSE, TRUE);

    if (!appData.showThinking)
      ShowThinkingProc(w,event,prms,nprms);

    AnalyzeFileEvent();
    FileNamePopUp("File to analyze", "", LoadGamePopUp, "r");
    AnalysisPeriodicEvent(1);
}

void TwoMachinesProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    TwoMachinesEvent();
}

void IcsClientProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    IcsClientEvent();
}

void EditGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    EditGameEvent();
}

void EditPositionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    EditPositionEvent();
}

void TrainingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    TrainingEvent();
}

void EditCommentProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (editUp) {
      EditCommentPopDown();
    } else {
      EditCommentEvent();
    }
}

void IcsInputBoxProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (ICSInputBoxUp) {
      ICSInputBoxPopDown();
    } else {
      ICSInputBoxPopUp();
    }
}

void AcceptProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    AcceptEvent();
}

void DeclineProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    DeclineEvent();
}

void RematchProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    RematchEvent();
}

void CallFlagProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    CallFlagEvent();
}

void DrawProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    DrawEvent();
}

void AbortProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    AbortEvent();
}

void AdjournProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    AdjournEvent();
}

void ResignProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ResignEvent();
}

void EnterKeyProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (ICSInputBoxUp == True)
      ICSInputSendText();
}

void StopObservingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    StopObservingEvent();
}

void StopExaminingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    StopExaminingEvent();
}


void ForwardProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ForwardEvent();
}


void BackwardProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    BackwardEvent();
}

void ToStartProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ToStartEvent();
}

void ToEndProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    ToEndEvent();
}

void RevertProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    RevertEvent();
}

void TruncateGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    TruncateGameEvent();
}
void RetractMoveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    RetractMoveEvent();
}

void MoveNowProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    MoveNowEvent();
}


void AlwaysQueenProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.alwaysPromoteToQueen = !appData.alwaysPromoteToQueen;

    if (appData.alwaysPromoteToQueen) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Always Queen"),
            args, 1);
}

void AnimateDraggingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.animateDragging = !appData.animateDragging;

    if (appData.animateDragging) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
        CreateAnimVars();
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Animate Dragging"),
            args, 1);
}

void AnimateMovingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.animate = !appData.animate;

    if (appData.animate) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
        CreateAnimVars();
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Animate Moving"),
            args, 1);
}

void AutocommProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoComment = !appData.autoComment;

    if (appData.autoComment) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Comment"),
            args, 1);
}


void AutoflagProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoCallFlag = !appData.autoCallFlag;

    if (appData.autoCallFlag) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Flag"),
            args, 1);
}

void AutoflipProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoFlipView = !appData.autoFlipView;

    if (appData.autoFlipView) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Flip View"),
            args, 1);
}

void AutobsProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoObserve = !appData.autoObserve;

    if (appData.autoObserve) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Observe"),
            args, 1);
}

void AutoraiseProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoRaiseBoard = !appData.autoRaiseBoard;

    if (appData.autoRaiseBoard) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Raise Board"),
            args, 1);
}

void AutosaveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.autoSaveGames = !appData.autoSaveGames;

    if (appData.autoSaveGames) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Auto Save"),
            args, 1);
}

void BlindfoldProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.blindfold = !appData.blindfold;

    if (appData.blindfold) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Blindfold"),
            args, 1);

    DrawPosition(True, NULL);
}

void TestLegalityProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.testLegality = !appData.testLegality;

    if (appData.testLegality) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Test Legality"),
            args, 1);
}


void FlashMovesProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    if (appData.flashCount == 0) {
      appData.flashCount = 3;
    } else {
      appData.flashCount = -appData.flashCount;
    }

    if (appData.flashCount > 0) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Flash Moves"),
            args, 1);
}

void FlipViewProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    flipView = !flipView;
    DrawPosition(True, NULL);
}

void GetMoveListProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.getMoveList = !appData.getMoveList;

    if (appData.getMoveList) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
      GetMoveListEvent();
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Get Move List"),
            args, 1);
}

#if HIGHDRAG
void HighlightDraggingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.highlightDragging = !appData.highlightDragging;

    if (appData.highlightDragging) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget,
                         "menuOptions.Highlight Dragging"), args, 1);
}
#endif

void HighlightLastMoveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.highlightLastMove = !appData.highlightLastMove;

    if (appData.highlightLastMove) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget,
                         "menuOptions.Highlight Last Move"), args, 1);
}

void IcsAlarmProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.icsAlarm = !appData.icsAlarm;

    if (appData.icsAlarm) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget,
                         "menuOptions.ICS Alarm"), args, 1);
}

void MoveSoundProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.ringBellAfterMoves = !appData.ringBellAfterMoves;

    if (appData.ringBellAfterMoves) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Move Sound"),
            args, 1);
}


void OldSaveStyleProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.oldSaveStyle = !appData.oldSaveStyle;

    if (appData.oldSaveStyle) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Old Save Style"),
            args, 1);
}

void PeriodicUpdatesProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    PeriodicUpdatesEvent(!appData.periodicUpdates);
      
    if (appData.periodicUpdates) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Periodic Updates"),
            args, 1);
}

void PonderNextMoveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    PonderNextMoveEvent(!appData.ponderNextMove);

    if (appData.ponderNextMove) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Ponder Next Move"),
            args, 1);
}

void PopupExitMessageProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.popupExitMessage = !appData.popupExitMessage;

    if (appData.popupExitMessage) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget,
                         "menuOptions.Popup Exit Message"), args, 1);
}

void PopupMoveErrorsProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.popupMoveErrors = !appData.popupMoveErrors;

    if (appData.popupMoveErrors) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Popup Move Errors"),
            args, 1);
}

void PremoveProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.premove = !appData.premove;

    if (appData.premove) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget,
                         "menuOptions.Premove"), args, 1);
}

void QuietPlayProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.quietPlay = !appData.quietPlay;

    if (appData.quietPlay) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Quiet Play"),
            args, 1);
}

void ShowCoordsProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    appData.showCoords = !appData.showCoords;

    if (appData.showCoords) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Show Coords"),
            args, 1);

    DrawPosition(True, NULL);
}

void ShowThinkingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];

    ShowThinkingEvent(!appData.showThinking);

    if (appData.showThinking) {
      XtSetArg(args[0], XtNleftBitmap, xMarkPixmap);
    } else {
      XtSetArg(args[0], XtNleftBitmap, None);
    }
    XtSetValues(XtNameToWidget(menuBarWidget, "menuOptions.Show Thinking"),
            args, 1);
}

void InfoProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    char buf[MSG_SIZ];
    sprintf(buf, "xterm -e info --directory %s --directory . -f %s &",
          INFODIR, INFOFILE);
    system(buf);
}

void ManProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    char buf[MSG_SIZ];
    String name;
    if (nprms && *nprms > 0)
      name = prms[0];
    else
      name = "xboard";
    sprintf(buf, "xterm -e man %s &", name);
    system(buf);
}

void HintProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    HintEvent();
}

void BookProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    BookEvent();
}

void AboutProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    char buf[MSG_SIZ];
#if ZIPPY
    char *zippy = " (with Zippy code)";
#else
    char *zippy = "";
#endif
    sprintf(buf, "%s%s\n\n%s\n%s\n\n%s%s\n%s",
          programVersion, zippy,
          "Copyright 1991 Digital Equipment Corporation",
          "Enhancements Copyright 1992-2001 Free Software Foundation",
          PRODUCT, " is free software and carries NO WARRANTY;",
          "see the file COPYING for more information.");
    ErrorPopUp("About XBoard", buf, FALSE);
}

void DebugProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    appData.debugMode = !appData.debugMode;
}

void AboutGameProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    AboutGameEvent();
}

void NothingProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    return;
}

void Iconify(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    Arg args[16];
    
    fromX = fromY = -1;
    XtSetArg(args[0], XtNiconic, True);
    XtSetValues(shellWidget, args, 1);
}

void DisplayMessage(message, extMessage)
     char *message, *extMessage;
{
    char buf[MSG_SIZ];
    Arg arg;
    
    if (extMessage) {
      if (*message) {
          sprintf(buf, "%s  %s", message, extMessage);
          message = buf;
      } else {
          message = extMessage;
      }
    }
    XtSetArg(arg, XtNlabel, message);
    XtSetValues(messageWidget, &arg, 1);
}

void DisplayTitle(text)
     char *text;
{
    Arg args[16];
    int i;
    char title[MSG_SIZ];
    char icon[MSG_SIZ];

    if (text == NULL) text = "";

    if (appData.titleInWindow) {
      i = 0;
      XtSetArg(args[i], XtNlabel, text);   i++;
      XtSetValues(titleWidget, args, i);
    }

    if (*text != NULLCHAR) {
      strcpy(icon, text);
      strcpy(title, text);
    } else if (appData.icsActive) {
      sprintf(icon, "%s", appData.icsHost);
      sprintf(title, "%s: %s", programName, appData.icsHost);
    } else if (appData.cmailGameName[0] != NULLCHAR) {
      sprintf(icon, "%s", "CMail");
      sprintf(title, "%s: %s", programName, "CMail");
    } else if (appData.noChessProgram) {
      strcpy(icon, programName);
      strcpy(title, programName);
    } else {
      strcpy(icon, first.tidy);
      sprintf(title, "%s: %s", programName, first.tidy);
    }
    i = 0;
    XtSetArg(args[i], XtNiconName, (XtArgVal) icon);    i++;
    XtSetArg(args[i], XtNtitle, (XtArgVal) title);      i++;
    XtSetValues(shellWidget, args, i);
}


void DisplayError(message, error)
     String message;
     int error;
{
    char buf[MSG_SIZ];

    if (error == 0) {
      if (appData.debugMode || appData.matchMode) {
          fprintf(stderr, "%s: %s\n", programName, message);
      }
    } else {
      if (appData.debugMode || appData.matchMode) {
          fprintf(stderr, "%s: %s: %s\n",
                programName, message, sys_errlist[error]);
      }
      sprintf(buf, "%s: %s", message, sys_errlist[error]);
      message = buf;
    } 
    ErrorPopUp("Error", message, FALSE);
}


void DisplayMoveError(message)
     String message;
{
    fromX = fromY = -1;
    ClearHighlights();
    DrawPosition(FALSE, NULL);
    if (appData.debugMode || appData.matchMode) {
      fprintf(stderr, "%s: %s\n", programName, message);
    }
    if (appData.popupMoveErrors) {
      ErrorPopUp("Error", message, FALSE);
    } else {
      DisplayMessage(message, "");
    }
}


void DisplayFatalError(message, error, status)
     String message;
     int error, status;
{
    char buf[MSG_SIZ];

    errorExitStatus = status;
    if (error == 0) {
      fprintf(stderr, "%s: %s\n", programName, message);
    } else {
      fprintf(stderr, "%s: %s: %s\n",
            programName, message, sys_errlist[error]);
      sprintf(buf, "%s: %s", message, sys_errlist[error]);
      message = buf;
    }
    if (appData.popupExitMessage && boardWidget && XtIsRealized(boardWidget)) {
      ErrorPopUp(status ? "Fatal Error" : "Exiting", message, TRUE);
    } else {
      ExitEvent(status);
    }
}

void DisplayInformation(message)
     String message;
{
    ErrorPopDown();
    ErrorPopUp("Information", message, TRUE);
}

static int
NullXErrorCheck(dpy, error_event)
     Display *dpy;
     XErrorEvent *error_event;
{
    return 0;
}

void DisplayIcsInteractionTitle(message)
     String message;
{
  if (oldICSInteractionTitle == NULL) {
    /* Magic to find the old window title, adapted from vim */
    char *wina = getenv("WINDOWID");
    if (wina != NULL) {
      Window win = (Window) atoi(wina);
      Window root, parent, *children;
      unsigned int nchildren;
      int (*oldHandler)() = XSetErrorHandler(NullXErrorCheck);
      for (;;) {
      if (XFetchName(xDisplay, win, &oldICSInteractionTitle)) break;
      if (!XQueryTree(xDisplay, win, &root, &parent,
                  &children, &nchildren)) break;
      if (children) XFree((void *)children);
      if (parent == root || parent == 0) break;
      win = parent;
      }
      XSetErrorHandler(oldHandler);
    }
    if (oldICSInteractionTitle == NULL) {
      oldICSInteractionTitle = "xterm"; 
    }
  }  
  printf("\033]0;%s\007", message);
  fflush(stdout);
}

char pendingReplyPrefix[MSG_SIZ];
ProcRef pendingReplyPR;

void AskQuestionProc(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    if (*nprms != 4) {
      fprintf(stderr, "AskQuestionProc needed 4 parameters, got %d\n",
            *nprms);
      return;
    }
    AskQuestionEvent(prms[0], prms[1], prms[2], prms[3]);
}

void AskQuestionPopDown()
{
    if (!askQuestionUp) return;
    XtPopdown(askQuestionShell);
    XtDestroyWidget(askQuestionShell);
    askQuestionUp = False;
}

void AskQuestionReplyAction(w, event, prms, nprms)
     Widget w;
     XEvent *event;
     String *prms;
     Cardinal *nprms;
{
    char buf[MSG_SIZ];
    int err;
    String reply;

    reply = XawDialogGetValueString(w = XtParent(w));
    strcpy(buf, pendingReplyPrefix);
    if (*buf) strcat(buf, " ");
    strcat(buf, reply);
    strcat(buf, "\n");
    OutputToProcess(pendingReplyPR, buf, strlen(buf), &err);
    AskQuestionPopDown();

    if (err) DisplayFatalError("Error writing to chess program", err, 0);
}

void AskQuestionCallback(w, client_data, call_data)
     Widget w;
     XtPointer client_data, call_data;
{
    String name;
    Arg args[16];

    XtSetArg(args[0], XtNlabel, &name);
    XtGetValues(w, args, 1);
    
    if (strcmp(name, "cancel") == 0) {
        AskQuestionPopDown();
    } else {
      AskQuestionReplyAction(w, NULL, NULL, NULL);
    }
}

void AskQuestion(title, question, replyPrefix, pr)
     char *title, *question, *replyPrefix;
     ProcRef pr;
{
    Arg args[16];
    Widget popup, layout, dialog, edit;
    Window root, child;
    int x, y, i;
    int win_x, win_y;
    unsigned int mask;
    
    strcpy(pendingReplyPrefix, replyPrefix);
    pendingReplyPR = pr;
    
    i = 0;
    XtSetArg(args[i], XtNresizable, True); i++;
    XtSetArg(args[i], XtNwidth, DIALOG_SIZE); i++;
    askQuestionShell = popup =
      XtCreatePopupShell(title, transientShellWidgetClass,
                   shellWidget, args, i);
    
    layout =
      XtCreateManagedWidget(layoutName, formWidgetClass, popup,
                      layoutArgs, XtNumber(layoutArgs));
  
    i = 0;
    XtSetArg(args[i], XtNlabel, question); i++;
    XtSetArg(args[i], XtNvalue, ""); i++;
    XtSetArg(args[i], XtNborderWidth, 0); i++;
    dialog = XtCreateManagedWidget("question", dialogWidgetClass,
                           layout, args, i);
    
    XawDialogAddButton(dialog, "enter", AskQuestionCallback,
                   (XtPointer) dialog);
    XawDialogAddButton(dialog, "cancel", AskQuestionCallback,
                   (XtPointer) dialog);

    XtRealizeWidget(popup);
    CatchDeleteWindow(popup, "AskQuestionPopDown");
    
    XQueryPointer(xDisplay, xBoardWindow, &root, &child,
              &x, &y, &win_x, &win_y, &mask);
    
    XtSetArg(args[0], XtNx, x - 10);
    XtSetArg(args[1], XtNy, y - 30);
    XtSetValues(popup, args, 2);
    
    XtPopup(popup, XtGrabExclusive);
    askQuestionUp = True;
    
    edit = XtNameToWidget(dialog, "*value");
    XtSetKeyboardFocus(popup, edit);
}


void
PlaySound(name)
     char *name;
{
  if (*name == NULLCHAR) {
    return;
  } else if (strcmp(name, "$") == 0) {
    putc(BELLCHAR, stderr);
  } else {
    char buf[2048];
    sprintf(buf, "%s '%s' &", appData.soundProgram, name);
    system(buf);
  }
}

void
RingBell()
{
  PlaySound(appData.soundMove);
}

void
PlayIcsWinSound()
{
  PlaySound(appData.soundIcsWin);
}

void
PlayIcsLossSound()
{
  PlaySound(appData.soundIcsLoss);
}

void
PlayIcsDrawSound()
{
  PlaySound(appData.soundIcsDraw);
}

void
PlayIcsUnfinishedSound()
{
  PlaySound(appData.soundIcsUnfinished);
}

void
PlayAlarmSound()
{
  PlaySound(appData.soundIcsAlarm);
}

void
EchoOn()
{
    system("stty echo");
}

void
EchoOff()
{
    system("stty -echo");
}

void
Colorize(cc, continuation)
     ColorClass cc;
     int continuation;
{
    char buf[MSG_SIZ];
    int count, outCount, error;

    if (textColors[(int)cc].bg > 0) {
      if (textColors[(int)cc].fg > 0) {
          sprintf(buf, "\033[0;%d;%d;%dm", textColors[(int)cc].attr,
                textColors[(int)cc].fg, textColors[(int)cc].bg);
      } else {
          sprintf(buf, "\033[0;%d;%dm", textColors[(int)cc].attr,
                textColors[(int)cc].bg);
      }
    } else {
      if (textColors[(int)cc].fg > 0) {
          sprintf(buf, "\033[0;%d;%dm", textColors[(int)cc].attr,
                textColors[(int)cc].fg);
      } else {
          sprintf(buf, "\033[0;%dm", textColors[(int)cc].attr);
      }
    }
    count = strlen(buf);
    outCount = OutputToProcess(NoProc, buf, count, &error);
    if (outCount < count) {
      DisplayFatalError("Error writing to display", error, 1);
    }

    if (continuation) return;
    switch (cc) {
    case ColorShout:
      PlaySound(appData.soundShout);
      break;
    case ColorSShout:
      PlaySound(appData.soundSShout);
      break;
    case ColorChannel1:
      PlaySound(appData.soundChannel1);
      break;
    case ColorChannel:
      PlaySound(appData.soundChannel);
      break;
    case ColorKibitz:
      PlaySound(appData.soundKibitz);
      break;
    case ColorTell:
      PlaySound(appData.soundTell);
      break;
    case ColorChallenge:
      PlaySound(appData.soundChallenge);
      break;
    case ColorRequest:
      PlaySound(appData.soundRequest);
      break;
    case ColorSeek:
      PlaySound(appData.soundSeek);
      break;
    case ColorNormal:
    case ColorNone:
    default:
      break;
    }
}

char *UserName()
{
    return getpwuid(getuid())->pw_name;
}

static char *ExpandPathName(path)
     char *path;
{
    static char static_buf[2000];
    char *d, *s, buf[2000];
    struct passwd *pwd;
  
    s = path;
    d = static_buf;

    while (*s && isspace(*s))
      ++s;

    if (!*s) {
      *d = 0;
      return static_buf;
    }

    if (*s == '~') {
      if (*(s+1) == '/') {
          strcpy(d, getpwuid(getuid())->pw_dir);
          strcat(d, s+1);
      }
      else {
          strcpy(buf, s+1);
          *strchr(buf, '/') = 0;
          pwd = getpwnam(buf);
          if (!pwd)
            {
              fprintf(stderr, "ERROR: Unknown user %s (in path %s)\n",
                    buf, path);
              return NULL;
            }
          strcpy(d, pwd->pw_dir);
          strcat(d, strchr(s+1, '/'));
      }
    }
    else
      strcpy(d, s);

    return static_buf;
}  

char *HostName()
{
    static char host_name[MSG_SIZ];
    
#if HAVE_GETHOSTNAME
    gethostname(host_name, MSG_SIZ);
    return host_name;
#else  /* not HAVE_GETHOSTNAME */
# if HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H
    sysinfo(SI_HOSTNAME, host_name, MSG_SIZ);
    return host_name;
# else /* not (HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H) */
    return "localhost";
# endif/* not (HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H) */
#endif /* not HAVE_GETHOSTNAME */
}

XtIntervalId delayedEventTimerXID = 0;
DelayedEventCallback delayedEventCallback = 0;
void
ScheduleDelayedEvent(cb, millisec)
     DelayedEventCallback cb; long millisec;
{
    delayedEventCallback = cb;
    delayedEventTimerXID =
      XtAppAddTimeOut(appContext, millisec, (XtTimerCallbackProc) cb,
                  (XtPointer) 0);
}

DelayedEventCallback
GetDelayedEvent()
{
  if (delayedEventTimerXID) {
    return delayedEventCallback;
  } else {
    return NULL;
  }
}

void
CancelDelayedEvent()
{
  if (delayedEventTimerXID) {
    XtRemoveTimeOut(delayedEventTimerXID);
    delayedEventTimerXID = 0;
  }
}

XtIntervalId loadGameTimerXID = 0;

int LoadGameTimerRunning()
{
    return loadGameTimerXID != 0;
}

int StopLoadGameTimer()
{
    if (loadGameTimerXID != 0) {
      XtRemoveTimeOut(loadGameTimerXID);
      loadGameTimerXID = 0;
      return TRUE;
    } else {
      return FALSE;
    }
}

void
LoadGameTimerCallback(arg, id)
     XtPointer arg;
     XtIntervalId *id;
{
    loadGameTimerXID = 0;
    AutoPlayGameLoop();
}

void
StartLoadGameTimer(millisec)
     long millisec;
{
    loadGameTimerXID =
      XtAppAddTimeOut(appContext, millisec,
                  (XtTimerCallbackProc) LoadGameTimerCallback,
                  (XtPointer) 0);
}

XtIntervalId analysisClockXID = 0;

void
AnalysisClockCallback(arg, id)
     XtPointer arg;
     XtIntervalId *id;
{
    if (gameMode == AnalyzeMode || gameMode == AnalyzeFile) {
      AnalysisPeriodicEvent(0);
      StartAnalysisClock();
    }
}

void
StartAnalysisClock()
{
    analysisClockXID =
      XtAppAddTimeOut(appContext, 2000,
                  (XtTimerCallbackProc) AnalysisClockCallback,
                  (XtPointer) 0);
}

XtIntervalId clockTimerXID = 0;

int ClockTimerRunning()
{
    return clockTimerXID != 0;
}

int StopClockTimer()
{
    if (clockTimerXID != 0) {
      XtRemoveTimeOut(clockTimerXID);
      clockTimerXID = 0;
      return TRUE;
    } else {
      return FALSE;
    }
}

void
ClockTimerCallback(arg, id)
     XtPointer arg;
     XtIntervalId *id;
{
    clockTimerXID = 0;
    DecrementClocks();
}

void
StartClockTimer(millisec)
     long millisec;
{
    clockTimerXID =
      XtAppAddTimeOut(appContext, millisec,
                  (XtTimerCallbackProc) ClockTimerCallback,
                  (XtPointer) 0);
}

void
DisplayTimerLabel(w, color, timer, highlight)
     Widget w;
     char *color;
     long timer;
     int highlight;
{
    char buf[MSG_SIZ];
    Arg args[16];
    
    if (appData.clockMode) {
      sprintf(buf, "%s: %s", color, TimeString(timer));
      XtSetArg(args[0], XtNlabel, buf);
    } else {
      sprintf(buf, "%s  ", color);
      XtSetArg(args[0], XtNlabel, buf);
    }
    
    if (highlight) {
      XtSetArg(args[1], XtNbackground, timerForegroundPixel);
      XtSetArg(args[2], XtNforeground, timerBackgroundPixel);
    } else {
      XtSetArg(args[1], XtNbackground, timerBackgroundPixel);
      XtSetArg(args[2], XtNforeground, timerForegroundPixel);
    }
    
    XtSetValues(w, args, 3);
}

void
DisplayWhiteClock(timeRemaining, highlight)
     long timeRemaining;
     int highlight;
{
    Arg args[16];
    DisplayTimerLabel(whiteTimerWidget, "White", timeRemaining, highlight);
    if (highlight && iconPixmap == bIconPixmap) {
      iconPixmap = wIconPixmap;
      XtSetArg(args[0], XtNiconPixmap, iconPixmap);
      XtSetValues(shellWidget, args, 1);
    }
}

void
DisplayBlackClock(timeRemaining, highlight)
     long timeRemaining;
     int highlight;
{
    Arg args[16];
    DisplayTimerLabel(blackTimerWidget, "Black", timeRemaining, highlight);
    if (highlight && iconPixmap == wIconPixmap) {
      iconPixmap = bIconPixmap;
      XtSetArg(args[0], XtNiconPixmap, iconPixmap);
      XtSetValues(shellWidget, args, 1);
    }
}

#define CPNone 0
#define CPReal 1
#define CPComm 2
#define CPSock 3
#define CPLoop 4
typedef int CPKind;

typedef struct {
    CPKind kind;
    int pid;
    int fdTo, fdFrom;  
} ChildProc;


int StartChildProcess(cmdLine, dir, pr)
     char *cmdLine; 
     char *dir;
     ProcRef *pr;
{
    char *argv[64], *p;
    int i, pid;
    int to_prog[2], from_prog[2];
    ChildProc *cp;
    char buf[MSG_SIZ];
    
    if (appData.debugMode) {
      fprintf(stderr, "StartChildProcess (dir=\"%s\") %s\n",dir, cmdLine);
    }

    /* We do NOT feed the cmdLine to the shell; we just
       parse it into blank-separated arguments in the
       most simple-minded way possible.
       */
    i = 0;
    strcpy(buf, cmdLine);
    p = buf;
    for (;;) {
      argv[i++] = p;
      p = strchr(p, ' ');
      if (p == NULL) break;
      *p++ = NULLCHAR;
    }
    argv[i] = NULL;

    SetUpChildIO(to_prog, from_prog);

    if ((pid = fork()) == 0) {
      /* Child process */
      dup2(to_prog[0], 0);
      dup2(from_prog[1], 1);
      close(to_prog[0]);
      close(to_prog[1]);
      close(from_prog[0]);
      close(from_prog[1]);
      dup2(1, fileno(stderr)); /* force stderr to the pipe */

      if (dir[0] != NULLCHAR && chdir(dir) != 0) {
          perror(dir);
          exit(1);
      }

        execvp(argv[0], argv);
      
      /* If we get here, exec failed */
      perror(argv[0]);
      exit(1);
    }
    
    /* Parent process */
    close(to_prog[0]);
    close(from_prog[1]);
    
    cp = (ChildProc *) calloc(1, sizeof(ChildProc));
    cp->kind = CPReal;
    cp->pid = pid;
    cp->fdFrom = from_prog[0];
    cp->fdTo = to_prog[1];
    *pr = (ProcRef) cp;
    return 0;
}

void
DestroyChildProcess(pr, signal)
     ProcRef pr;
     int signal;
{
    ChildProc *cp = (ChildProc *) pr;

    if (cp->kind != CPReal) return;
    cp->kind = CPNone;
    if (signal) {
      kill(cp->pid, SIGTERM);
    }
    /* Process is exiting either because of the kill or because of
       a quit command sent by the backend; either way, wait for it to die.
    */
    wait((int *) 0);
    close(cp->fdFrom);
    close(cp->fdTo);
}

void
InterruptChildProcess(pr)
     ProcRef pr;
{
    ChildProc *cp = (ChildProc *) pr;

    if (cp->kind != CPReal) return;
    (void) kill(cp->pid, SIGINT); /* stop it thinking */
}

int OpenTelnet(host, port, pr)
     char *host;
     char *port;
     ProcRef *pr;
{
    char cmdLine[MSG_SIZ];

    if (port[0] == NULLCHAR) {
      sprintf(cmdLine, "%s %s", appData.telnetProgram, host);
    } else {
      sprintf(cmdLine, "%s %s %s", appData.telnetProgram, host, port);
    }
    return StartChildProcess(cmdLine, "", pr);
}

int OpenTCP(host, port, pr)
     char *host;
     char *port;
     ProcRef *pr;
{
#if OMIT_SOCKETS
    DisplayFatalError("Socket support is not configured in", 0, 2);
#else  /* !OMIT_SOCKETS */
    int s;
    struct sockaddr_in sa;
    struct hostent     *hp;
    unsigned short uport;
    ChildProc *cp;

    if ((s = socket(AF_INET, SOCK_STREAM, 6)) < 0) {
      return errno;
    }

    memset((char *) &sa, (int)0, sizeof(struct sockaddr_in));
    sa.sin_family = AF_INET;
    sa.sin_addr.s_addr = INADDR_ANY;
    uport = (unsigned short) 0;
    sa.sin_port = htons(uport);
    if (bind(s, (struct sockaddr *) &sa, sizeof(struct sockaddr_in)) < 0) {
      return errno;
    }

    memset((char *) &sa, (int)0, sizeof(struct sockaddr_in));
    if (!(hp = gethostbyname(host))) {
      int b0, b1, b2, b3;
      if (sscanf(host, "%d.%d.%d.%d", &b0, &b1, &b2, &b3) == 4) {
          hp = (struct hostent *) calloc(1, sizeof(struct hostent));
          hp->h_addrtype = AF_INET;
          hp->h_length = 4;
          hp->h_addr_list = (char **) calloc(2, sizeof(char *));
          hp->h_addr_list[0] = (char *) malloc(4);
          hp->h_addr_list[0][0] = b0;
          hp->h_addr_list[0][1] = b1;
          hp->h_addr_list[0][2] = b2;
          hp->h_addr_list[0][3] = b3;
      } else {
          return ENOENT;
      }
    }
    sa.sin_family = hp->h_addrtype;
    uport = (unsigned short) atoi(port);
    sa.sin_port = htons(uport);
    memcpy((char *) &sa.sin_addr, hp->h_addr, hp->h_length);

    if (connect(s, (struct sockaddr *) &sa, 
            sizeof(struct sockaddr_in)) < 0) {
      return errno;
    }

    cp = (ChildProc *) calloc(1, sizeof(ChildProc));
    cp->kind = CPSock;
    cp->pid = 0;
    cp->fdFrom = s;
    cp->fdTo = s;
    *pr = (ProcRef) cp;

#endif /* !OMIT_SOCKETS */

    return 0;
}

int OpenCommPort(name, pr)
     char *name;
     ProcRef *pr;
{
    int fd;
    ChildProc *cp;

    fd = open(name, 2, 0);
    if (fd < 0) return errno;

    cp = (ChildProc *) calloc(1, sizeof(ChildProc));
    cp->kind = CPComm;
    cp->pid = 0;
    cp->fdFrom = fd;
    cp->fdTo = fd;
    *pr = (ProcRef) cp;

    return 0;
}

int OpenLoopback(pr)
     ProcRef *pr;
{
    ChildProc *cp;
    int to[2], from[2];

    SetUpChildIO(to, from);

    cp = (ChildProc *) calloc(1, sizeof(ChildProc));
    cp->kind = CPLoop;
    cp->pid = 0;
    cp->fdFrom = to[0];       /* note not from[0]; we are doing a loopback */
    cp->fdTo = to[1];
    *pr = (ProcRef) cp;

    return 0;
}

int OpenRcmd(host, user, cmd, pr)
     char *host, *user, *cmd;
     ProcRef *pr;
{
    DisplayFatalError("internal rcmd not implemented for Unix", 0, 1);
    return -1;
}    

#define INPUT_SOURCE_BUF_SIZE 8192

typedef struct {
    CPKind kind;
    int fd;
    int lineByLine;
    char *unused;
    InputCallback func;
    XtInputId xid;
    char buf[INPUT_SOURCE_BUF_SIZE];
    VOIDSTAR closure;
} InputSource;

void
DoInputCallback(closure, source, xid) 
     caddr_t closure;
     int *source;
     XtInputId *xid;
{
    InputSource *is = (InputSource *) closure;
    int count;
    int error;
    char *p, *q;

    if (is->lineByLine) {
      count = read(is->fd, is->unused,
                 INPUT_SOURCE_BUF_SIZE - (is->unused - is->buf));
      if (count <= 0) {
          (is->func)(is, is->closure, is->buf, count, count ? errno : 0);
          return;
      }
      is->unused += count;
      p = is->buf;
      while (p < is->unused) {
          q = memchr(p, '\n', is->unused - p);
          if (q == NULL) break;
          q++;
          (is->func)(is, is->closure, p, q - p, 0);
          p = q;
      }
      q = is->buf;
      while (p < is->unused) {
          *q++ = *p++;
      }
      is->unused = q;
    } else {
      count = read(is->fd, is->buf, INPUT_SOURCE_BUF_SIZE);
      if (count == -1)
        error = errno;
      else
        error = 0;
      (is->func)(is, is->closure, is->buf, count, error);
    } 
}

InputSourceRef AddInputSource(pr, lineByLine, func, closure)
     ProcRef pr;
     int lineByLine;
     InputCallback func;
     VOIDSTAR closure;
{
    InputSource *is;
    ChildProc *cp = (ChildProc *) pr;

    is = (InputSource *) calloc(1, sizeof(InputSource));
    is->lineByLine = lineByLine;
    is->func = func;
    if (pr == NoProc) {
      is->kind = CPReal;
      is->fd = fileno(stdin);
    } else {
      is->kind = cp->kind;
      is->fd = cp->fdFrom;
    }
    if (lineByLine) {
      is->unused = is->buf;
    }
    
    is->xid = XtAppAddInput(appContext, is->fd,
                      (XtPointer) (XtInputReadMask),
                      (XtInputCallbackProc) DoInputCallback,
                      (XtPointer) is);
    is->closure = closure;
    return (InputSourceRef) is;
}

void
RemoveInputSource(isr)
     InputSourceRef isr;
{
    InputSource *is = (InputSource *) isr;

    if (is->xid == 0) return;
    XtRemoveInput(is->xid);
    is->xid = 0;
}

int OutputToProcess(pr, message, count, outError)
     ProcRef pr;
     char *message;
     int count;
     int *outError;
{
    ChildProc *cp = (ChildProc *) pr;
    int outCount;

    if (pr == NoProc)
      outCount = fwrite(message, 1, count, stdout);
    else
      outCount = write(cp->fdTo, message, count);

    if (outCount == -1)
      *outError = errno;
    else
      *outError = 0;

    return outCount;
}

/* Output message to process, with "ms" milliseconds of delay
   between each character. This is needed when sending the logon
   script to ICC, which for some reason doesn't like the
   instantaneous send. */
int OutputToProcessDelayed(pr, message, count, outError, msdelay)
     ProcRef pr;
     char *message;
     int count;
     int *outError;
     long msdelay;
{
    ChildProc *cp = (ChildProc *) pr;
    int outCount = 0;
    int r;
    
    while (count--) {
      r = write(cp->fdTo, message++, 1);
      if (r == -1) {
          *outError = errno;
          return outCount;
      }
      ++outCount;
      if (msdelay >= 0)
        TimeDelay(msdelay);
    }

    return outCount;
}

/**** Animation code by Hugh Fisher, DCS, ANU.

      Known problem: if a window overlapping the board is
      moved away while a piece is being animated underneath,
      the newly exposed area won't be updated properly.
      I can live with this.

      Known problem: if you look carefully at the animation
      of pieces in mono mode, they are being drawn as solid
      shapes without interior detail while moving. Fixing
      this would be a major complication for minimal return.
****/

/*    Masks for XPM pieces. Black and white pieces can have
      different shapes, but in the interest of retaining my
      sanity pieces must have the same outline on both light
      and dark squares, and all pieces must use the same
      background square colors/images.          */

static void
CreateAnimMasks (pieceDepth)
     int pieceDepth;
{
  ChessSquare   piece;
  Pixmap    buf;
  GC        bufGC, maskGC;
  int       kind, n;
  unsigned long   plane;
  XGCValues values;

  /* Need a bitmap just to get a GC with right depth */
  buf = XCreatePixmap(xDisplay, xBoardWindow,
                  8, 8, 1);
  values.foreground = 1;
  values.background = 0;
  /* Don't use XtGetGC, not read only */
  maskGC = XCreateGC(xDisplay, buf,
                GCForeground | GCBackground, &values);
  XFreePixmap(xDisplay, buf);

  buf = XCreatePixmap(xDisplay, xBoardWindow,
                  squareSize, squareSize, pieceDepth);            
  values.foreground = XBlackPixel(xDisplay, xScreen);
  values.background = XWhitePixel(xDisplay, xScreen);
  bufGC = XCreateGC(xDisplay, buf,
                GCForeground | GCBackground, &values);

  for (piece = WhitePawn; piece <= BlackKing; piece++) {
    /* Begin with empty mask */
    xpmMask[piece] = XCreatePixmap(xDisplay, xBoardWindow,
                         squareSize, squareSize, 1);
    XSetFunction(xDisplay, maskGC, GXclear);
    XFillRectangle(xDisplay, xpmMask[piece], maskGC,
               0, 0, squareSize, squareSize);
               
    /* Take a copy of the piece */
    if (White(piece))
      kind = 0;
    else
      kind = 2;
    XSetFunction(xDisplay, bufGC, GXcopy);
    XCopyArea(xDisplay, xpmPieceBitmap[kind][((int)piece) % 6],
            buf, bufGC,
            0, 0, squareSize, squareSize, 0, 0);
            
    /* XOR the background (light) over the piece */
    XSetFunction(xDisplay, bufGC, GXxor);
    if (useImageSqs)
      XCopyArea(xDisplay, xpmLightSquare, buf, bufGC,
            0, 0, squareSize, squareSize, 0, 0);
    else {
      XSetForeground(xDisplay, bufGC, lightSquareColor);
      XFillRectangle(xDisplay, buf, bufGC, 0, 0, squareSize, squareSize);
    }
    
    /* We now have an inverted piece image with the background
       erased. Construct mask by just selecting all the non-zero
       pixels - no need to reconstruct the original image.  */
    XSetFunction(xDisplay, maskGC, GXor);
    plane = 1;
    /* Might be quicker to download an XImage and create bitmap
       data from it rather than this N copies per piece, but it
       only takes a fraction of a second and there is a much
       longer delay for loading the pieces.           */
    for (n = 0; n < pieceDepth; n ++) {
      XCopyPlane(xDisplay, buf, xpmMask[piece], maskGC,
             0, 0, squareSize, squareSize,
             0, 0, plane);
      plane = plane << 1;
    }
  }
  /* Clean up */
  XFreePixmap(xDisplay, buf);
  XFreeGC(xDisplay, bufGC);
  XFreeGC(xDisplay, maskGC);
}

static void
InitAnimState (anim, info)
  AnimState * anim;
  XWindowAttributes * info;
{
  XtGCMask  mask;
  XGCValues values;
  
  /* Each buffer is square size, same depth as window */
  anim->saveBuf = XCreatePixmap(xDisplay, xBoardWindow,
                  squareSize, squareSize, info->depth);
  anim->newBuf = XCreatePixmap(xDisplay, xBoardWindow,
                  squareSize, squareSize, info->depth);

  /* Create a plain GC for blitting */
  mask = GCForeground | GCBackground | GCFunction |
         GCPlaneMask | GCGraphicsExposures;
  values.foreground = XBlackPixel(xDisplay, xScreen);
  values.background = XWhitePixel(xDisplay, xScreen);
  values.function   = GXcopy;
  values.plane_mask = AllPlanes;
  values.graphics_exposures = False;
  anim->blitGC = XCreateGC(xDisplay, xBoardWindow, mask, &values);

  /* Piece will be copied from an existing context at
     the start of each new animation/drag. */
  anim->pieceGC = XCreateGC(xDisplay, xBoardWindow, 0, &values);

  /* Outline will be a read-only copy of an existing */
  anim->outlineGC = None;
}

static void
CreateAnimVars ()
{
  static int done = 0;
  XWindowAttributes info;

  if (done) return;
  done = 1;
  XGetWindowAttributes(xDisplay, xBoardWindow, &info);
  
  InitAnimState(&game, &info);
  InitAnimState(&player, &info);
  
  /* For XPM pieces, we need bitmaps to use as masks. */
  if (useImages)
    CreateAnimMasks(info.depth);
}

#ifndef HAVE_USLEEP

static Boolean frameWaiting;

static RETSIGTYPE FrameAlarm (sig)
     int sig;
{
  frameWaiting = False;
  /* In case System-V style signals.  Needed?? */
  signal(SIGALRM, FrameAlarm);
}

static void
FrameDelay (time)
     int time;
{
  struct itimerval delay;
  
  XSync(xDisplay, False);

  if (time > 0) {
    frameWaiting = True;
    signal(SIGALRM, FrameAlarm);
    delay.it_interval.tv_sec = 
      delay.it_value.tv_sec = time / 1000;
    delay.it_interval.tv_usec = 
      delay.it_value.tv_usec = (time % 1000) * 1000;
    setitimer(ITIMER_REAL, &delay, NULL);
#if 0
    /* Ugh -- busy-wait! --tpm */
    while (frameWaiting); 
#else
    while (frameWaiting) pause();
#endif
    delay.it_interval.tv_sec = delay.it_value.tv_sec = 0;
    delay.it_interval.tv_usec = delay.it_value.tv_usec = 0;
    setitimer(ITIMER_REAL, &delay, NULL);
  }
}

#else

static void
FrameDelay (time)
     int time;
{
  XSync(xDisplay, False);
  if (time > 0)
    usleep(time * 1000);
}

#endif

/*    Convert board position to corner of screen rect and color   */

static void
ScreenSquare(column, row, pt, color)
     int column; int row; XPoint * pt; int * color;
{
  if (flipView) {
    pt->x = lineGap + ((BOARD_SIZE-1)-column) * (squareSize + lineGap);
    pt->y = lineGap + row * (squareSize + lineGap);
  } else {
    pt->x = lineGap + column * (squareSize + lineGap);
    pt->y = lineGap + ((BOARD_SIZE-1)-row) * (squareSize + lineGap);
  }
  *color = ((column + row) % 2) == 1;
}

/*    Convert window coords to square                 */

static void
BoardSquare(x, y, column, row)
     int x; int y; int * column; int * row;
{
  *column = EventToSquare(x, BOARD_SIZE);
  if (flipView && *column >= 0)
    *column = BOARD_SIZE - 1 - *column;
  *row = EventToSquare(y, BOARD_SIZE);
  if (!flipView && *row >= 0)
    *row = BOARD_SIZE - 1 - *row;
}

/*   Utilities    */

#undef Max  /* just in case */
#undef Min
#define Max(a, b) ((a) > (b) ? (a) : (b))
#define Min(a, b) ((a) < (b) ? (a) : (b))

static void
SetRect(rect, x, y, width, height)
     XRectangle * rect; int x; int y; int width; int height;
{
  rect->x = x;
  rect->y = y;
  rect->width  = width;
  rect->height = height;
}

/*    Test if two frames overlap. If they do, return
      intersection rect within old and location of
      that rect within new. */
      
static Boolean
Intersect(old, new, size, area, pt)
     XPoint * old; XPoint * new;
     int size; XRectangle * area; XPoint * pt;
{
  if (old->x > new->x + size || new->x > old->x + size ||
      old->y > new->y + size || new->y > old->y + size) {
    return False;
  } else {
    SetRect(area, Max(new->x - old->x, 0), Max(new->y - old->y, 0),
            size - abs(old->x - new->x), size - abs(old->y - new->y));
    pt->x = Max(old->x - new->x, 0);
    pt->y = Max(old->y - new->y, 0);
    return True;
  }
}

/*    For two overlapping frames, return the rect(s)
      in the old that do not intersect with the new.   */
      
static void
CalcUpdateRects(old, new, size, update, nUpdates)
     XPoint * old; XPoint * new; int size;
     XRectangle update[]; int * nUpdates;
{
  int      count;

  /* If old = new (shouldn't happen) then nothing to draw */
  if (old->x == new->x && old->y == new->y) {
    *nUpdates = 0;
    return;
  }
  /* Work out what bits overlap. Since we know the rects
     are the same size we don't need a full intersect calc. */
  count = 0;
  /* Top or bottom edge? */
  if (new->y > old->y) {
    SetRect(&(update[count]), old->x, old->y, size, new->y - old->y);
    count ++;
  } else if (old->y > new->y) {
    SetRect(&(update[count]), old->x, old->y + size - (old->y - new->y),
                        size, old->y - new->y);
    count ++;
  }
  /* Left or right edge - don't overlap any update calculated above. */
  if (new->x > old->x) {
    SetRect(&(update[count]), old->x, Max(new->y, old->y),
                        new->x - old->x, size - abs(new->y - old->y));
    count ++;
  } else if (old->x > new->x) {
    SetRect(&(update[count]), new->x + size, Max(new->y, old->y),
                        old->x - new->x, size - abs(new->y - old->y));
    count ++;
  }
  /* Done */
  *nUpdates = count;
}

/*    Generate a series of frame coords from start->mid->finish.
      The movement rate doubles until the half way point is
      reached, then halves back down to the final destination,
      which gives a nice slow in/out effect. The algorithmn
      may seem to generate too many intermediates for short
      moves, but remember that the purpose is to attract the
      viewers attention to the piece about to be moved and
      then to where it ends up. Too few frames would be less
      noticeable.                               */

static void
Tween(start, mid, finish, factor, frames, nFrames)
     XPoint * start; XPoint * mid;
     XPoint * finish; int factor;
     XPoint frames[]; int * nFrames;
{
  int fraction, n, count;

  count = 0;

  /* Slow in, stepping 1/16th, then 1/8th, ... */
  fraction = 1;
  for (n = 0; n < factor; n++)
    fraction *= 2;
  for (n = 0; n < factor; n++) {
    frames[count].x = start->x + (mid->x - start->x) / fraction;
    frames[count].y = start->y + (mid->y - start->y) / fraction;
    count ++;
    fraction = fraction / 2;
  }
  
  /* Midpoint */
  frames[count] = *mid;
  count ++;
  
  /* Slow out, stepping 1/2, then 1/4, ... */
  fraction = 2;
  for (n = 0; n < factor; n++) {
    frames[count].x = finish->x - (finish->x - mid->x) / fraction;
    frames[count].y = finish->y - (finish->y - mid->y) / fraction;
    count ++;
    fraction = fraction * 2;
  }
  *nFrames = count;
}

/*    Draw a piece on the screen without disturbing what's there  */

static void
SelectGCMask(piece, clip, outline, mask)
     ChessSquare piece; GC * clip; GC * outline; Pixmap * mask;
{
  GC source;

  /* Bitmap for piece being moved. */
  if (appData.monoMode) {
      *mask = *pieceToSolid(piece);
  } else if (useImages) {
#if HAVE_LIBXPM
      *mask = xpmMask[piece];
#else
      *mask = ximMaskPm[piece%6];
#endif
  } else {
      *mask = *pieceToSolid(piece);
  }

  /* GC for piece being moved. Square color doesn't matter, but
     since it gets modified we make a copy of the original. */
  if (White(piece)) {
    if (appData.monoMode)
      source = bwPieceGC;
    else
      source = wlPieceGC;
  } else {
    if (appData.monoMode)
      source = wbPieceGC;
    else
      source = blPieceGC;
  }
  XCopyGC(xDisplay, source, 0xFFFFFFFF, *clip);
  
  /* Outline only used in mono mode and is not modified */
  if (White(piece))
    *outline = bwPieceGC;
  else
    *outline = wbPieceGC;
}

static void
OverlayPiece(piece, clip, outline,  dest)
     ChessSquare piece; GC clip; GC outline; Drawable dest;
{
  int kind;
  
  if (!useImages) {
    /* Draw solid rectangle which will be clipped to shape of piece */
    XFillRectangle(xDisplay, dest, clip,
               0, 0, squareSize, squareSize);
    if (appData.monoMode)
      /* Also draw outline in contrasting color for black
       on black / white on white cases          */
      XCopyPlane(xDisplay, *pieceToOutline(piece), dest, outline,
             0, 0, squareSize, squareSize, 0, 0, 1);
  } else {
    /* Copy the piece */
    if (White(piece))
      kind = 0;
    else
      kind = 2;
    XCopyArea(xDisplay, xpmPieceBitmap[kind][((int)piece) % 6],
            dest, clip,
            0, 0, squareSize, squareSize,
            0, 0);            
  }
}

/* Animate the movement of a single piece */

static void 
BeginAnimation(anim, piece, startColor, start)
     AnimState *anim;
     ChessSquare piece;
     int startColor;
     XPoint * start;
{
  Pixmap mask;
  
  /* The old buffer is initialised with the start square (empty) */
  BlankSquare(0, 0, startColor, EmptySquare, anim->saveBuf);
  anim->prevFrame = *start;
  
  /* The piece will be drawn using its own bitmap as a matte      */
  SelectGCMask(piece, &anim->pieceGC, &anim->outlineGC, &mask);
  XSetClipMask(xDisplay, anim->pieceGC, mask);
}

static void
AnimationFrame(anim, frame, piece)
     AnimState *anim;
     XPoint *frame;
     ChessSquare piece;
{
  XRectangle updates[4];
  XRectangle overlap;
  XPoint     pt;
  int      count, i;
  
  /* Save what we are about to draw into the new buffer */
  XCopyArea(xDisplay, xBoardWindow, anim->newBuf, anim->blitGC,
          frame->x, frame->y, squareSize, squareSize,
          0, 0);
            
  /* Erase bits of the previous frame */
  if (Intersect(&anim->prevFrame, frame, squareSize, &overlap, &pt)) {
    /* Where the new frame overlapped the previous,
       the contents in newBuf are wrong. */
    XCopyArea(xDisplay, anim->saveBuf, anim->newBuf, anim->blitGC,
            overlap.x, overlap.y,
            overlap.width, overlap.height,
            pt.x, pt.y);
    /* Repaint the areas in the old that don't overlap new */
    CalcUpdateRects(&anim->prevFrame, frame, squareSize, updates, &count);
    for (i = 0; i < count; i++)
      XCopyArea(xDisplay, anim->saveBuf, xBoardWindow, anim->blitGC,
            updates[i].x - anim->prevFrame.x,
            updates[i].y - anim->prevFrame.y,
            updates[i].width, updates[i].height,
            updates[i].x, updates[i].y);
  } else {
    /* Easy when no overlap */
    XCopyArea(xDisplay, anim->saveBuf, xBoardWindow, anim->blitGC,
              0, 0, squareSize, squareSize,
              anim->prevFrame.x, anim->prevFrame.y);
  }

  /* Save this frame for next time round */
  XCopyArea(xDisplay, anim->newBuf, anim->saveBuf, anim->blitGC,
            0, 0, squareSize, squareSize,
            0, 0);
  anim->prevFrame = *frame;
  
  /* Draw piece over original screen contents, not current,
     and copy entire rect. Wipes out overlapping piece images. */
  OverlayPiece(piece, anim->pieceGC, anim->outlineGC, anim->newBuf);
  XCopyArea(xDisplay, anim->newBuf, xBoardWindow, anim->blitGC,
            0, 0, squareSize, squareSize,
            frame->x, frame->y);
}

static void
EndAnimation (anim, finish)
     AnimState *anim;
     XPoint *finish;
{
  XRectangle updates[4];
  XRectangle overlap;
  XPoint     pt;
  int      count, i;

  /* The main code will redraw the final square, so we
     only need to erase the bits that don't overlap.  */
  if (Intersect(&anim->prevFrame, finish, squareSize, &overlap, &pt)) {
    CalcUpdateRects(&anim->prevFrame, finish, squareSize, updates, &count);
    for (i = 0; i < count; i++)
      XCopyArea(xDisplay, anim->saveBuf, xBoardWindow, anim->blitGC,
            updates[i].x - anim->prevFrame.x,
            updates[i].y - anim->prevFrame.y,
            updates[i].width, updates[i].height,
            updates[i].x, updates[i].y);
  } else {
    XCopyArea(xDisplay, anim->saveBuf, xBoardWindow, anim->blitGC,
            0, 0, squareSize, squareSize,
            anim->prevFrame.x, anim->prevFrame.y);
  }
}

static void
FrameSequence(anim, piece, startColor, start, finish, frames, nFrames)
     AnimState *anim;
     ChessSquare piece; int startColor;
     XPoint * start; XPoint * finish;
     XPoint frames[]; int nFrames;
{
  int n;

  BeginAnimation(anim, piece, startColor, start);
  for (n = 0; n < nFrames; n++) {
    AnimationFrame(anim, &(frames[n]), piece);
    FrameDelay(appData.animSpeed);
  }
  EndAnimation(anim, finish);
}

/* Main control logic for deciding what to animate and how */

void
AnimateMove(board, fromX, fromY, toX, toY)
     Board board;
     int fromX;
     int fromY;
     int toX;
     int toY;
{
  ChessSquare piece;
  int hop;
  XPoint      start, finish, mid;
  XPoint      frames[kFactor * 2 + 1];
  int       nFrames, startColor, endColor;

  /* Are we animating? */
  if (!appData.animate || appData.blindfold)
    return;

  if (fromY < 0 || fromX < 0 || toX < 0 || toY < 0) return;
  piece = board[fromY][fromX];
  if (piece >= EmptySquare) return;

#if DONT_HOP
  hop = FALSE;
#else
  hop = (piece == WhiteKnight || piece == BlackKnight);
#endif

  if (appData.debugMode) {
      printf("AnimateMove: piece %d %s from %d,%d to %d,%d \n",
           piece, hop ? "hops" : "slides", fromX, fromY, toX, toY);
  }

  ScreenSquare(fromX, fromY, &start, &startColor);
  ScreenSquare(toX, toY, &finish, &endColor);

  if (hop) {
    /* Knight: make diagonal movement then straight */
    if (abs(toY - fromY) < abs(toX - fromX)) {
       mid.x = start.x + (finish.x - start.x) / 2;
       mid.y = finish.y;
     } else {
       mid.x = finish.x;
       mid.y = start.y + (finish.y - start.y) / 2;
     }
  } else {
    mid.x = start.x + (finish.x - start.x) / 2;
    mid.y = start.y + (finish.y - start.y) / 2;
  }
  
  /* Don't use as many frames for very short moves */
  if (abs(toY - fromY) + abs(toX - fromX) <= 2)
    Tween(&start, &mid, &finish, kFactor - 1, frames, &nFrames);
  else
    Tween(&start, &mid, &finish, kFactor, frames, &nFrames);
  FrameSequence(&game, piece, startColor, &start, &finish, frames, nFrames);
  
  /* Be sure end square is redrawn */
  damage[toY][toX] = True;
}

static void
DragPieceBegin(x, y)
     int x; int y;
{
    int      boardX, boardY, color;
    XPoint corner;

    /* Are we animating? */
    if (!appData.animateDragging || appData.blindfold)
      return;
     
    /* Figure out which square we start in and the
       mouse position relative to top left corner. */
    BoardSquare(x, y, &boardX, &boardY);
    player.startBoardX = boardX;
    player.startBoardY = boardY;
    ScreenSquare(boardX, boardY, &corner, &color);
    player.startSquare  = corner;
    player.startColor   = color;
#if 0
    /* Start from exactly where the piece is.  This can be confusing
       if you start dragging far from the center of the square; most
       or all of the piece can be over a different square from the one
       the mouse pointer is in. */
    player.mouseDelta.x = x - corner.x;
    player.mouseDelta.y = y - corner.y;
#else
    /* As soon as we start dragging, the piece will jump slightly to
       be centered over the mouse pointer. */
    player.mouseDelta.x = squareSize/2;
    player.mouseDelta.y = squareSize/2;
#endif
    /* Initialise animation */
    player.dragPiece = PieceForSquare(boardX, boardY);
    /* Sanity check */
    if (player.dragPiece >= 0 && player.dragPiece < EmptySquare) {
      player.dragActive = True;
      BeginAnimation(&player, player.dragPiece, color, &corner);
      /* Mark this square as needing to be redrawn. Note that
         we don't remove the piece though, since logically (ie
         as seen by opponent) the move hasn't been made yet. */
      damage[boardY][boardX] = True;
    } else {
      player.dragActive = False;
    }
}

static void
DragPieceMove(x, y)
     int x; int y;
{
    XPoint corner;

    /* Are we animating? */
    if (!appData.animateDragging || appData.blindfold)
      return;
     
    /* Sanity check */
    if (! player.dragActive)
      return;
    /* Move piece, maintaining same relative position
       of mouse within square  */
    corner.x = x - player.mouseDelta.x;
    corner.y = y - player.mouseDelta.y;
    AnimationFrame(&player, &corner, player.dragPiece);
#if HIGHDRAG
    if (appData.highlightDragging) {
      int boardX, boardY;
      BoardSquare(x, y, &boardX, &boardY);
      SetHighlights(fromX, fromY, boardX, boardY);
    }
#endif
}

static void
DragPieceEnd(x, y)
     int x; int y;
{
    int boardX, boardY, color;
    XPoint corner;

    /* Are we animating? */
    if (!appData.animateDragging || appData.blindfold)
      return;
     
    /* Sanity check */
    if (! player.dragActive)
      return;
    /* Last frame in sequence is square piece is
       placed on, which may not match mouse exactly. */
    BoardSquare(x, y, &boardX, &boardY);
    ScreenSquare(boardX, boardY, &corner, &color);
    EndAnimation(&player, &corner);

    /* Be sure end square is redrawn */
    damage[boardY][boardX] = True;

    /* This prevents weird things happening with fast successive
       clicks which on my Sun at least can cause motion events
       without corresponding press/release. */
    player.dragActive = False;
}

/* Handle expose event while piece being dragged */

static void
DrawDragPiece ()
{
  if (!player.dragActive || appData.blindfold)
    return;

  /* What we're doing: logically, the move hasn't been made yet,
     so the piece is still in it's original square. But visually
     it's being dragged around the board. So we erase the square
     that the piece is on and draw it at the last known drag point. */
  BlankSquare(player.startSquare.x, player.startSquare.y,
            player.startColor, EmptySquare, xBoardWindow);
  AnimationFrame(&player, &player.prevFrame, player.dragPiece);
  damage[player.startBoardY][player.startBoardX] = TRUE;
}


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