/*
 * $Id: next.trm,v 1.23 2004/04/13 17:24:35 broeker Exp $
 *
 */

/* GNUPLOT - next.trm */

/*[
 * Copyright 1991 - 1993, 1998, 2004
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or 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.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the complete modified source code.  Modifications are to
 * be distributed as patches to the released version.  Permission to
 * distribute binaries produced by compiling modified sources is granted,
 * provided you
 *   1. distribute the corresponding source modifications from the
 *    released version in the form of a patch file along with the binaries,
 *   2. add special version identification to distinguish your version
 *    in addition to the base release version number,
 *   3. provide your name and address as the primary contact for the
 *    support of your modified version, and
 *   4. retain our contact information in regard to use of the base
 *    software.
 * Permission to distribute the released version of the source code along
 * with corresponding source modifications in the form of a patch file is
 * granted with same provisions 2 through 4 for binary distributions.
 *
 * This software is provided "as is" without express or implied warranty
 * to the extent permitted by applicable law.
]*/

/*
 * This file is included by ../term.c via ../term.h.
 *
 * This terminal driver supports:
 *     next
 *
 * AUTHORS
 *  Robert Lutwak from Russell Lang's post.trm
 *  'old' option invokes Nick Strobel's original, single viewport terminal
 * 
 * send your comments or suggestions to (gnuplot-info@lists.sourceforge.net).
 *
 * This terminal attempts to connect, via the NeXTstep Distributed
 * Objects system, to the "gnuplotServer."  If there is no such
 * service registered with the OS, the terminal attempts to fire
 * up GnuTerm.app.  If the user has not set the environment variable
 * GNUTERMPATH, the terminal uses the users ApplicationPaths Workspace
 * dwrite to search for GnuTerm.app (Note:  this is usually something
 * like ~/Apps, ~/LocalApps, ~/NextApps, etc.).
 * In order to use this filter, you MUST have GnuTerm.app installed
 * on your system.
 *
 * Once connected to the server, this filter is basically Russell Lang's
 * Postscript filter, except that the resultant postscript code 
 * is sent, via the D.O. system, to GnuTerm.app, which manages 
 * the windows which produce the postscript output on the screen.
 * 
 *
 * Defaults are
 * 'set term next new dashed auto "Helvetica" 14'
 *
 * To change font to Times-Roman and font size to 20pts use 
 * 'set term next "Times-Roman" 20'.
 *
 * to choose window by title
 * 'set term next title "Window title"
 *
 * Monitor Options:
 * monochrome, color
 *
 * To invoke Nick Strobel's old terminal
 * 'set term next old'
 */

#include "driver.h"

#ifdef TERM_REGISTER
register_term(next)
#endif

#ifdef TERM_PROTO

/* whether or not to compile support for the old (self-contained)
   NeXT terminal */
/* #define NEXT_OLDTERMINAL	1 */

#import <appkit/appkit.h>
#import <remote/NXProxy.h>	/* setProtocolForProxy */
#import <remote/NXConnection.h>	/* setProtocolForProxy */
#import <machkit/NXNetNameServer.h>
#import <machkit/senderIsInvalid.h>
#import <stdarg.h>


#ifdef NEXT_OLDTERMINAL
static void window_create __PROTO((void));
@interface EpsViewer:Application
{
    id theNewWin;
}

-windowCreate:(NXCoord)
width Height:(NXCoord) height;
-(NXRect *) nextRectForWidth:(NXCoord)
width Height:(NXCoord) height;
@end
#endif /* NEXT_OLDTERMINAL */


TERM_PUBLIC void NEXT_options __PROTO((void));
TERM_PUBLIC void NEXT_common_init __PROTO((int uses_fonts, unsigned int xoff, unsigned int yoff, unsigned int xsize, unsigned int ysize, char **dict));
TERM_PUBLIC void NEXT_init __PROTO((void));
TERM_PUBLIC void NEXT_graphics __PROTO((void));
TERM_PUBLIC void NEXT_text __PROTO((void));
TERM_PUBLIC void NEXT_reset __PROTO((void));
TERM_PUBLIC void NEXT_linetype __PROTO((int linetype));
TERM_PUBLIC void NEXT_move __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void NEXT_vector __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void NEXT_put_text __PROTO((unsigned int x, unsigned int y, const char *str));
TERM_PUBLIC int NEXT_text_angle __PROTO((int ang));
TERM_PUBLIC int NEXT_justify_text __PROTO((enum JUSTIFY mode));
TERM_PUBLIC void NEXT_point __PROTO((unsigned int x, unsigned int y, int number));
TERM_PUBLIC int NEXT_set_font __PROTO((const char *font));
TERM_PUBLIC char *NEXT_RememberFont __PROTO((char *fname));
TERM_PUBLIC void NEXT_set_pointsize __PROTO((double size));


#define NEXT_POINT_TYPES 8	/* div */
#define NEXT_XOFF	1	/* page offset in pts */
#define NEXT_YOFF	1
#define NEXT_XMAX 6400
#define NEXT_YMAX 4800
#define NEXT_XLAST (NEXT_XMAX - 1)
#define NEXT_YLAST (NEXT_YMAX - 1)
#define NEXT_VTIC (NEXT_YMAX/80)
#define NEXT_HTIC (NEXT_YMAX/80)
#define NEXT_SC (10)		/* scale is 1pt = 10 units */
#define	NEXT_LW (0.5*NEXT_SC)	/* linewidth = 0.5 pts */
#define NEXT_VCHAR (14*NEXT_SC)	/* default is 14 point characters */
#define NEXT_HCHAR (14*NEXT_SC*6/10)

#define GOT_NEXT_PROTO
#endif


#ifndef TERM_PROTO_ONLY

#ifdef TERM_BODY

@interface GnuTermDriver:Object < NXSenderIsInvalid >
{
    id server;
}

-senderIsInvalid:(id) sender;
-plot:(char *) PSstr;
-init;
@end


#define DEFAULTNEXTSIZE 10000

static id gnuTermAccess;	/* local object manages the D.O. connection */

static char *NEXTBuffer, *NEXTBufAt, *NEXTBufEnd;
static int NEXTsize;
static char NEXTTmpBuf[1000];
static void NEXTPrintf(char *,...);
static TBOOLEAN NEXT_oldterminal = FALSE;
/*static TBOOLEAN NEXT_colordetect();*/

static char NEXT_title[MAX_LINE_LEN + 1];	/* name of font */

static char NEXT_font[MAX_LINE_LEN + 1] = "Helvetica";	/* name of font */
static int NEXT_fontsize = 14;	/* size of font in pts */
static int NEXT_default_font[MAX_ID_LEN+1] = {'\0'};
static TBOOLEAN NEXT_color = FALSE;
static TBOOLEAN NEXT_solid = FALSE;	/*  use dashed lines */
static int NEXT_path_count = 0;	/* count of lines in path */
static int NEXT_ang = 0;	/* text angle */
static enum JUSTIFY NEXT_justify = LEFT;	/* text is flush left */

static TBOOLEAN NEXT_duplex_state = FALSE;
static TBOOLEAN NEXT_duplex_option = FALSE;

static char GPFAR *GPFAR NEXT_header[] =
{
    "/M {moveto} bind def\n",
    "/L {lineto} bind def\n",
    "/R {rmoveto} bind def\n",
    "/V {rlineto} bind def\n",
    "/vpt2 vpt 2 mul def\n",
    "/hpt2 hpt 2 mul def\n",
/* flush left show */
    "/Lshow { currentpoint stroke M\n",
    "  0 vshift R show } def\n",
/* flush right show */
    "/Rshow { currentpoint stroke M\n",
    "  dup stringwidth pop neg vshift R show } def\n",
/* centred show */
    "/Cshow { currentpoint stroke M\n",
    "  dup stringwidth pop -2 div vshift R show } def\n",
/* Dash or Color Line */
    "/DL { Color {setrgbcolor Solid {pop []} if 0 setdash }\n",
    " {pop pop pop Solid {pop []} if 0 setdash} ifelse } def\n",
/* Border Lines */
    "/BL { stroke gnulinewidth 2 mul setlinewidth } def\n",
/* Axes Lines */
    "/AL { stroke gnulinewidth 2 div setlinewidth } def\n",
/* Plot Lines */
    "/PL { stroke gnulinewidth setlinewidth } def\n",
/* Line Types */
    "/LTb { BL [] 0 0 0 DL } def\n",	/* border */
    "/LTa { AL [1 dl 2 dl] 0 setdash 0 0 0 setrgbcolor } def\n",	/* axes */
    "/LT0 { PL [] 0 1 0 DL } def\n",
    "/LT1 { PL [4 dl 2 dl] 0 0 1 DL } def\n",
    "/LT2 { PL [2 dl 3 dl] 1 0 0 DL } def\n",
    "/LT3 { PL [1 dl 1.5 dl] 1 0 1 DL } def\n",
    "/LT4 { PL [5 dl 2 dl 1 dl 2 dl] 0 1 1 DL } def\n",
    "/LT5 { PL [4 dl 3 dl 1 dl 3 dl] 1 1 0 DL } def\n",
    "/LT6 { PL [2 dl 2 dl 2 dl 4 dl] 0 0 0 DL } def\n",
    "/LT7 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 1 0.3 0 DL } def\n",
    "/LT8 { PL [2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 2 dl 4 dl] 0.5 0.5 0.5 DL } def\n",
/* Point (Round) */ /* Matt Heffron make it round */
    "/Pnt { stroke [] 0 setdash\n",
    "   gsave 1 setlinecap M 0 0 V stroke grestore } def\n",

/* Diamond */
    "/Dia { stroke [] 0 setdash 2 copy vpt add M\n",
    "  hpt neg vpt neg V hpt vpt neg V\n",
    "  hpt vpt V hpt neg vpt V closepath stroke\n",
    "  Pnt } def\n",

/* Plus */
    "/Pls { stroke [] 0 setdash vpt sub M 0 vpt2 V\n",
    "  currentpoint stroke M\n",
    "  hpt neg vpt neg R hpt2 0 V stroke\n",
    "  } def\n",

/* Box */
    "/Box { stroke [] 0 setdash 2 copy exch hpt sub exch vpt add M\n",
    "  0 vpt2 neg V hpt2 0 V 0 vpt2 V\n",
    "  hpt2 neg 0 V closepath stroke\n",
    "  Pnt } def\n",

/* Cross (X) */
    "/Crs { stroke [] 0 setdash exch hpt sub exch vpt add M\n",
    "  hpt2 vpt2 neg V currentpoint stroke M\n",
    "  hpt2 neg 0 R hpt2 vpt2 V stroke } def\n",

/* Triangle Up*/
    "/TriU { stroke [] 0 setdash 2 copy vpt 1.12 mul add M\n",
    "  hpt neg vpt -1.62 mul V\n",
    "  hpt 2 mul 0 V\n",
    "  hpt neg vpt 1.62 mul V closepath stroke\n",
    "  Pnt  } def\n",

/* Star */
    "/Star { 2 copy Pls Crs } def\n",

/* div added filed box */
/* Filled Box */
    "/BoxF { stroke [] 0 setdash exch hpt sub exch vpt add M\n",
    "  0 vpt2 neg V  hpt2 0 V  0 vpt2 V\n",
    "  hpt2 neg 0 V  closepath fill } def\n",

/* div added filled triangle */
/* Triangle Up, Filled */
    "/TriUF { stroke [] 0 setdash vpt 1.12 mul add M\n",
    "  hpt neg vpt -1.62 mul V\n",
    "  hpt 2 mul 0 V\n",
    "  hpt neg vpt 1.62 mul V closepath fill } def\n",

/* Matt Heffron: added a few more types */
/* Triangle Down */
    "/TriD { stroke [] 0 setdash 2 copy vpt 1.12 mul sub M\n",
    "  hpt neg vpt 1.62 mul V\n",
    "  hpt 2 mul 0 V\n",
    "  hpt neg vpt -1.62 mul V closepath stroke\n",
    "  Pnt  } def\n",

/* Triangle Down, Filled*/
    "/TriDF { stroke [] 0 setdash vpt 1.12 mul sub M\n",
    "  hpt neg vpt 1.62 mul V\n",
    "  hpt 2 mul 0 V\n",
    "  hpt neg vpt -1.62 mul V closepath fill} def\n",

/* Diamond, Filled */
    "/DiaF { stroke [] 0 setdash vpt add M\n",
    "  hpt neg vpt neg V hpt vpt neg V\n",
    "  hpt vpt V hpt neg vpt V closepath fill } def\n",

/* Pentagon */
    "/Pent { stroke [] 0 setdash 2 copy gsave\n",
    "  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat\n",
    "  closepath stroke grestore Pnt } def\n",

/* Pentagon, Filled */
    "/PentF { stroke [] 0 setdash gsave\n",
    "  translate 0 hpt M 4 {72 rotate 0 hpt L} repeat\n",
    "  closepath fill grestore } def\n",

/* Circle */
    "/Circle { stroke [] 0 setdash 2 copy\n",
    "  hpt 0 360 arc stroke Pnt } def\n",

/* Circle,Filled */
    "/CircleF { stroke [] 0 setdash hpt 0 360 arc fill } def\n",
/* 16 differently filled circles */
    "/C0 { BL [] 0 setdash 2 copy moveto vpt 90 450  arc } bind def\n",
    "/C1 { BL [] 0 setdash 2 copy        moveto\n",
    "       2 copy  vpt 0 90 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C2 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 90 180 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C3 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 0 180 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C4 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 180 270 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C5 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 0 90 arc\n",
    "       2 copy moveto\n",
    "       2 copy  vpt 180 270 arc closepath fill\n",
    "               vpt 0 360 arc } bind def\n",
    "/C6 { BL [] 0 setdash 2 copy moveto\n",
    "      2 copy  vpt 90 270 arc closepath fill\n",
    "              vpt 0 360 arc closepath } bind def\n",
    "/C7 { BL [] 0 setdash 2 copy moveto\n",
    "      2 copy  vpt 0 270 arc closepath fill\n",
    "              vpt 0 360 arc closepath } bind def\n",
    "/C8 { BL [] 0 setdash 2 copy moveto\n",
    "      2 copy vpt 270 360 arc closepath fill\n",
    "              vpt 0 360 arc closepath } bind def\n",
    "/C9 { BL [] 0 setdash 2 copy moveto\n",
    "      2 copy  vpt 270 450 arc closepath fill\n",
    "              vpt 0 360 arc closepath } bind def\n",
    "/C10 { BL [] 0 setdash 2 copy 2 copy moveto vpt 270 360 arc closepath fill\n",
    "       2 copy moveto\n",
    "       2 copy vpt 90 180 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C11 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 0 90 arc closepath fill\n",
    "       2 copy moveto\n",
    "       2 copy  vpt 180 360 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C12 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 180 360 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C13 { BL [] 0 setdash  2 copy moveto\n",
    "       2 copy  vpt 0 90 arc closepath fill\n",
    "       2 copy moveto\n",
    "       2 copy  vpt 180 360 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",
    "/C14 { BL [] 0 setdash 2 copy moveto\n",
    "       2 copy  vpt 90 360 arc closepath fill\n",
    "               vpt 0 360 arc } bind def\n",
    "/C15 { BL [] 0 setdash 2 copy vpt 0 360 arc closepath fill\n",
    "               vpt 0 360 arc closepath } bind def\n",

/* Auxiliary definitions for rectangles */

    "/Rec   { newpath 4 2 roll moveto 1 index 0 rlineto 0 exch rlineto\n",
    "       neg 0 rlineto closepath } bind def\n",
    "/Square { dup Rec } bind def\n",
    "/Bsquare { vpt sub exch vpt sub exch vpt2 Square } bind def\n",

/* 16 differently filled squares */

    "/S0 { BL [] 0 setdash 2 copy moveto 0 vpt rlineto BL Bsquare } bind def\n",
    "/S1 { BL [] 0 setdash 2 copy vpt Square fill Bsquare } bind def\n",
    "/S2 { BL [] 0 setdash 2 copy exch vpt sub exch vpt Square fill Bsquare } bind def\n",
    "/S3 { BL [] 0 setdash 2 copy exch vpt sub exch vpt2 vpt Rec fill Bsquare } bind def\n",
    "/S4 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def\n",
    "/S5 { BL [] 0 setdash 2 copy 2 copy vpt Square fill\n",
    "       exch vpt sub exch vpt sub vpt Square fill Bsquare } bind def\n",
    "/S6 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill Bsquare } bind def\n",
    "/S7 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt vpt2 Rec fill\n",
    "       2 copy vpt Square fill\n",
    "       Bsquare } bind def\n",
    "/S8 { BL [] 0 setdash 2 copy vpt sub vpt Square fill Bsquare } bind def\n",
    "/S9 { BL [] 0 setdash 2 copy vpt sub vpt vpt2 Rec fill Bsquare } bind def\n",
    "/S10 { BL [] 0 setdash 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt Square fill\n",
    "       Bsquare } bind def\n",
    "/S11 { 2 copy vpt sub vpt Square fill 2 copy exch vpt sub exch vpt2 vpt Rec fill\n",
    "       Bsquare } bind def\n",
    "/S12 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill Bsquare } bind def\n",
    "/S13 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill\n",
    "       2 copy vpt Square fill Bsquare } bind def\n",
    "/S14 { BL [] 0 setdash 2 copy exch vpt sub exch vpt sub vpt2 vpt Rec fill\n",
    "       2 copy exch vpt sub exch vpt Square fill Bsquare } bind def\n",
    "/S15 { BL [] 0 setdash 2 copy Bsquare fill Bsquare } bind def\n",

/* 16 different diamonds (actually just rotated squares) */

    "/D0 { gsave translate 45 rotate 0 0 Box stroke grestore } bind def\n",
    "/D1 { gsave translate 45 rotate 0 0 S1 stroke grestore } bind def\n",
    "/D2 { gsave translate 45 rotate 0 0 S2 stroke grestore } bind def\n",
    "/D3 { gsave translate 45 rotate 0 0 S3 stroke grestore } bind def\n",
    "/D4 { gsave translate 45 rotate 0 0 S4 stroke grestore } bind def\n",
    "/D5 { gsave translate 45 rotate 0 0 S5 stroke grestore } bind def\n",
    "/D6 { gsave translate 45 rotate 0 0 S6 stroke grestore } bind def\n",
    "/D7 { gsave translate 45 rotate 0 0 S7 stroke grestore } bind def\n",
    "/D8 { gsave translate 45 rotate 0 0 S8 stroke grestore } bind def\n",
    "/D9 { gsave translate 45 rotate 0 0 S9 stroke grestore } bind def\n",
    "/D10 { gsave translate 45 rotate 0 0 S10 stroke grestore } bind def\n",
    "/D11 { gsave translate 45 rotate 0 0 S11 stroke grestore } bind def\n",
    "/D12 { gsave translate 45 rotate 0 0 S12 stroke grestore } bind def\n",
    "/D13 { gsave translate 45 rotate 0 0 S13 stroke grestore } bind def\n",
    "/D14 { gsave translate 45 rotate 0 0 S14 stroke grestore } bind def\n",
    "/D15 { gsave translate 45 rotate 0 0 S15 stroke grestore } bind def\n",

    NULL
};

static char GPFAR *GPFAR ENHNEXT_header[] =
{
/* For MFshow and MFwidth the tos is an array with the string and font info:  */
/*	[<fontname (a string)> <fontsize> <vertical offset> <width significant?> <text string>]  */

    "/MFshow {{dup dup 0 get findfont exch 1 get scalefont setfont\n",
    "     [ currentpoint ] exch dup 2 get 0 exch rmoveto dup 4 get show dup\n",
    "     3 get {2 get neg 0 exch rmoveto pop} {pop aload pop moveto}ifelse} forall} bind def\n",
    "/MFwidth {0 exch {dup 3 get{dup dup 0 get findfont exch 1 get scalefont setfont\n",
    "      4 get stringwidth pop add}\n",
    "    {pop} ifelse} forall} bind def\n",

/* flush left show */
    "/MLshow { currentpoint stroke M\n",
    "  0 exch R MFshow } bind def\n",

/* flush right show */
    "/MRshow { currentpoint stroke M\n",
    "  exch dup MFwidth neg 3 -1 roll R MFshow } def\n",

/* centred show */
    "/MCshow { currentpoint stroke M\n",
    "  exch dup MFwidth -2 div 3 -1 roll R MFshow } def\n",
    NULL
};

/* added to post by Matt Heffron <heffron@falstaff.css.beckman.com> */
/* moved to post.trm by drd */

struct NEXT_FontName {
    char *name;
    struct NEXT_FontName *next;
} *NEXT_DocFonts = NULL;

enum NEXT_id {
    NEXT_DEFAULT, NEXT_MONOCHROME, NEXT_COLOR,
    NEXT_SOLID, NEXT_DASHED,
    NEXT_SIMPLEX, NEXT_DUPLEX, NEXT_DEFAULTPLEX,
    NEXT_OLD, NEXT_NEW, NEXT_TITLE,
    NEXT_OTHER
};

static struct gen_table NEXT_opts[] =
{
    { "d$efault", NEXT_DEFAULT },
    { "mono$chrome", NEXT_MONOCHROME },
    { "col$or", NEXT_COLOR },
    { "col$our", NEXT_COLOR },
    { "so$lid", NEXT_SOLID },
    { "da$shed", NEXT_DASHED },
    { "si$mplex", NEXT_SIMPLEX },
    { "du$plex", NEXT_DUPLEX },
    { "defaultp$lex", NEXT_DEFAULTPLEX },
    { "old", NEXT_OLD },
    { "new", NEXT_NEW },
    { "ti$tle", NEXT_TITLE },
    { NULL, NEXT_OTHER }
};

TERM_PUBLIC void
NEXT_options()
{
    char buf[40];
    struct value a;

    while (!END_OF_COMMAND) {
	switch(lookup_table(&NEXT_opts[0],c_token)) {
	case NEXT_DEFAULT:
	    NEXT_oldterminal = FALSE;
	    /*NEXT_color=NEXT_colordetect(); */
	    NEXT_color = FALSE;
	    NEXT_solid = FALSE;
	    NEXT_duplex_option = FALSE;
	    strcpy(NEXT_font, "Helvetica");
	    NEXT_fontsize = 14;
	    term->v_char = (unsigned int) (NEXT_fontsize * NEXT_SC);
	    term->h_char = (unsigned int) (NEXT_fontsize * NEXT_SC * 6 / 10);
	    term->put_text = NEXT_put_text;
	    c_token++;
	    break;
	case NEXT_MONOCHROME:
	    NEXT_color = FALSE;
	    c_token++;
	    break;
	case NEXT_COLOR:
	    NEXT_color = TRUE;
	    c_token++;
	    break;
	case NEXT_SOLID:
	    NEXT_solid = TRUE;
	    c_token++;
	    break;
	case NEXT_DASHED:
	    NEXT_solid = FALSE;
	    c_token++;
	    break;
	case NEXT_SIMPLEX:
	    NEXT_duplex_state = FALSE;
	    NEXT_duplex_option = TRUE;
	    c_token++;
	    break;
	case NEXT_DUPLEX:
	    NEXT_duplex_state = TRUE;
	    NEXT_duplex_option = TRUE;
	    c_token++;
	    break;
	case NEXT_DEFAULTPLEX:
	    NEXT_duplex_option = FALSE;
	    c_token++;
	    break;
	case NEXT_OLD:
	    NEXT_oldterminal = TRUE;
	    c_token++;
	    break;
	case NEXT_NEW:
	    NEXT_oldterminal = FALSE;
	    c_token++;
	    break;
	case NEXT_TITLE:
	    c_token++;
	    if (!isstring(c_token)) {
		fprintf(stderr, "usage:  set term next title \"newtitle\"\n");
	    }
	    quote_str(NEXT_title, c_token, MAX_LINE_LEN + 1);
	    break;
	case NEXT_OTHER:
	default:
	    if (isstring(c_token)) {
		quote_str(NEXT_font, c_token, MAX_LINE_LEN + 1);

		/* We must have font size specified */
		NEXT_fontsize = (int) real(const_express(&a));
		term->v_char = (unsigned int) (NEXT_fontsize * NEXT_SC);
		term->h_char = (unsigned int) (NEXT_fontsize * NEXT_SC * 6 / 10);
		sprintf(NEXT_default_font, "%s,%d", NEXT_font, NEXT_fontsize);
	    }
	    break;
	}
    }

    sprintf(term_options, "%s %s %s %s \"%s\" %d title \"%s\"",
	    NEXT_oldterminal ? "old" : "new",
	    NEXT_color ? "color" : "monochrome",
	    NEXT_solid ? "solid" : "dashed",
	    NEXT_duplex_option ? (NEXT_duplex_state ? "duplex" : "simplex")
	    : "defaultplex",
	    NEXT_font,
	    NEXT_fontsize,
	    NEXT_title);
}


TERM_PUBLIC char *
NEXT_RememberFont(fname)
char *fname;
{
    struct NEXT_FontName *fnp;

    for (fnp = NEXT_DocFonts; fnp && strcmp(fnp->name, fname); fnp = fnp->next);
    if (fnp)
	return fnp->name;	/* we must have found it in the list */

    if (encoding == S_ENC_ISO8859_1) {
	NEXTPrintf("/%s reencodeISO def\n", fname);
    }
    fnp = (struct NEXT_FontName *) gp_alloc(sizeof(struct NEXT_FontName), "PostScript Font record");
    fnp->name = gp_alloc(1 + strlen(fname), "PostScript Font name");
    strcpy(fnp->name, fname);
    fnp->next = NEXT_DocFonts;
    NEXT_DocFonts = fnp;
    return fnp->name;
}

int NEXT_pen_x, NEXT_pen_y;
int NEXT_taken;
int NEXT_linetype_last;
TBOOLEAN NEXT_relative_ok;

/* store settings passed to common_init() for use in NEXT_graphics()
 * are reserved for storing the term options
 */
static int NEXT_common_uses_fonts;
static unsigned int NEXT_common_xoff, NEXT_common_yoff;


TERM_PUBLIC void
NEXT_common_init(uses_fonts, xoff, yoff, width, height, dict)
int uses_fonts;			/* 0 for NEXT(la)tex */
unsigned int xoff, yoff;	/* offset  - 50 for /post, 0 for NEXT(la)tex */
unsigned int width, height;	/* for bounding box */
char **dict;			/* extra entries for the dictionary */
{
    static char GPFAR NEXTi1[] = "%%%%Creator: gnuplot\n\
%%%%DocumentFonts: %s\n";
    static char GPFAR NEXTi2[] = "%%%%EndComments\n\
/gnudict 120 dict def\ngnudict begin\n\
/Color %s def\n\
/Solid %s def\n\
/gnulinewidth %.3f def\n\
/vshift %d def\n\
/dl {%d mul} def\n\
/hpt %.1f def\n\
/vpt %.1f def\n";
    static char GPFAR *NEXT_iso_8859_1_encoding[] =
    {
	"/reencodeISO {\n",
	"dup dup findfont dup length dict begin\n",
	"{ 1 index /FID ne { def }{ pop pop } ifelse } forall\n",
	"/Encoding ISOLatin1Encoding def\n",
	"currentdict end definefont\n",
	"} def\n",
	"/ISOLatin1Encoding [\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/space/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright\n",
	"/parenleft/parenright/asterisk/plus/comma/minus/period/slash\n",
	"/zero/one/two/three/four/five/six/seven/eight/nine/colon/semicolon\n",
	"/less/equal/greater/question/at/A/B/C/D/E/F/G/H/I/J/K/L/M/N\n",
	"/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash/bracketright\n",
	"/asciicircum/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m\n",
	"/n/o/p/q/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/asciitilde\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n",
	"/.notdef/dotlessi/grave/acute/circumflex/tilde/macron/breve\n",
	"/dotaccent/dieresis/.notdef/ring/cedilla/.notdef/hungarumlaut\n",
	"/ogonek/caron/space/exclamdown/cent/sterling/currency/yen/brokenbar\n",
	"/section/dieresis/copyright/ordfeminine/guillemotleft/logicalnot\n",
	"/hyphen/registered/macron/degree/plusminus/twosuperior/threesuperior\n",
	"/acute/mu/paragraph/periodcentered/cedilla/onesuperior/ordmasculine\n",
	"/guillemotright/onequarter/onehalf/threequarters/questiondown\n",
	"/Agrave/Aacute/Acircumflex/Atilde/Adieresis/Aring/AE/Ccedilla\n",
	"/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute/Icircumflex\n",
	"/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis\n",
	"/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute\n",
	"/Thorn/germandbls/agrave/aacute/acircumflex/atilde/adieresis\n",
	"/aring/ae/ccedilla/egrave/eacute/ecircumflex/edieresis/igrave\n",
	"/iacute/icircumflex/idieresis/eth/ntilde/ograve/oacute/ocircumflex\n",
	"/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex/udieresis\n",
	"/yacute/thorn/ydieresis\n",
	"] def\n",
	NULL};


    struct termentry *t = term;
    int i;

    NEXT_common_uses_fonts = uses_fonts;
    NEXT_common_xoff = xoff;
    NEXT_common_yoff = yoff;


    NEXTPrintf("%%!NEXT-Adobe-2.0\n");

    NEXTPrintf(NEXTi1, uses_fonts ? "(atend)" : "");

    NEXTPrintf("%%%%BoundingBox: %d %d %d %d\n", xoff, yoff,
	       (int) (xsize * width / NEXT_SC + 0.5 + xoff),
	       (int) (ysize * height / NEXT_SC + 0.5 + yoff));

    NEXTPrintf(NEXTi2,
	       NEXT_color ? "true" : "false",
	       NEXT_solid ? "true" : "false",
	       NEXT_LW,		/* line width */
	       (int) (t->v_char) / (-3),	/* shift for vertical centring */
	       NEXT_SC,		/* dash length */
	       NEXT_HTIC / 2.0,	/* half point width */
	       NEXT_VTIC / 2.0);	/* half point height */

    if (uses_fonts && (encoding == S_ENC_ISO8859_1)) {
	for (i = 0; NEXT_iso_8859_1_encoding[i] != NULL; i++) {
	    NEXTPrintf("%s", NEXT_iso_8859_1_encoding[i]);
	}
    }
    for (i = 0; NEXT_header[i] != NULL; i++)
	NEXTPrintf("%s", NEXT_header[i]);
    if (NEXT_duplex_option)
	NEXTPrintf("statusdict begin %s setduplexmode end\n",
		   NEXT_duplex_state ? "true" : "false");
    NEXT_RememberFont(NEXT_font);

    if (dict)
	while (*dict)
	    NEXTPrintf("%s", *(dict++));

    NEXTPrintf("end\n%%%%EndProlog\n");
}

/* the init fn for the NeXT Terminal driver */
TERM_PUBLIC void
NEXT_init()
{

    /* Initialize output string */
    NEXTsize = DEFAULTNEXTSIZE;
    if ((NEXTBuffer = malloc(NEXTsize)) == NULL) {
	printf("Malloc error in next filter init\n");
	exit(1);
    }
    NEXTBufEnd = NEXTBuffer + NEXTsize;
    NEXTBufAt = NEXTBuffer;


    term->xmax = NEXT_XMAX;
    term->ymax = NEXT_YMAX;

#ifdef NEXT_OLDTERMINAL
    if (NEXT_oldterminal)
	window_create();
    else
	gnuTermAccess =[[GnuTermDriver alloc] init];
#else
    gnuTermAccess =[[GnuTermDriver alloc] init];
#endif



}


TERM_PUBLIC void
NEXT_graphics()
{
    static char GPFAR NEXTg1[] = "0 setgray\nnewpath\n";
    struct termentry *t = term;

    *NEXTBuffer = 0;
    NEXTBufAt = NEXTBuffer;

    NEXT_common_init(1, NEXT_XOFF, NEXT_YOFF, term->xmax, term->ymax,
		     ENHNEXT_header);

    NEXTPrintf("gnudict begin\ngsave\n");
    NEXTPrintf("%d %d translate\n", NEXT_common_xoff, NEXT_common_yoff);
    NEXTPrintf("%.3f %.3f scale\n", 1.0 / NEXT_SC, 1.0 / NEXT_SC);


    NEXTPrintf(NEXTg1);
    if (NEXT_common_uses_fonts)
	NEXTPrintf("(%s) findfont %d scalefont setfont\n", NEXT_font, (t->v_char));
    NEXT_path_count = 0;
    NEXT_relative_ok = FALSE;
    NEXT_pen_x = NEXT_pen_y = -4000;
    NEXT_taken = 0;
    NEXT_linetype_last = -1;

#ifdef NEXT_OLDTERMINAL
    if (NEXT_oldterminal) {
	/* Fill window with white */
	NEXTPrintf("1 setgray\n");
	NEXTPrintf("0 0 %d %d rectfill\n", NEXT_XMAX, NEXT_YMAX);
	NEXTPrintf("0 setgray\n");
    }
#endif


}


TERM_PUBLIC void
NEXT_text()
{
    static DPSContext d;

    NEXT_path_count = 0;
    NEXTPrintf("stroke\ngrestore\nend\n");

    /* Terminate string */
    *NEXTBufAt = 0;

    if (NEXT_oldterminal) {
	d = DPSGetCurrentContext();
	DPSPrintf(d, NEXTBuffer);
	DPSFlushContext(d);
    } else {
	/* Here's the call that dumps the string to the server */
      [gnuTermAccess plot:NEXTBuffer];

    }

}


TERM_PUBLIC void
NEXT_reset()
{
    NEXTPrintf("%%%%Trailer\n");
    if (!NEXT_common_uses_fonts) {
	NEXTPrintf("%%%%DocumentFonts: ");
	while (NEXT_DocFonts) {
	    struct NEXT_FontName *fnp;
	    fnp = NEXT_DocFonts->next;
	    NEXTPrintf("%s%s", NEXT_DocFonts->name, fnp ? ", " : "\n");
	    free(NEXT_DocFonts->name);
	    free(NEXT_DocFonts);
	    NEXT_DocFonts = fnp;
	}
    }
}


TERM_PUBLIC void
NEXT_linetype(linetype)
int linetype;
{
    linetype = (linetype % 9) + 2;
    if (linetype < 0)
	linetype = 0;
    NEXT_relative_ok = FALSE;
    if (NEXT_linetype_last == linetype)
	return;
    NEXT_linetype_last = linetype;
    NEXTPrintf("LT%c\n", "ba012345678"[linetype]);
    NEXT_path_count = 0;
}


TERM_PUBLIC void
NEXT_move(x, y)
unsigned int x, y;
{
    int dx, dy;
    char abso[20], rel[20];
    dx = x - NEXT_pen_x;
    dy = y - NEXT_pen_y;
    /* can't cancel all null moves--need a move after stroke'ing */
    if (dx == 0 && dy == 0 && NEXT_relative_ok)
	return;
    sprintf(abso, "%d %d M\n", x, y);
    sprintf(rel, "%d %d R\n", dx, dy);
    if (strlen(rel) < strlen(abso) && NEXT_relative_ok) {
	NEXTPrintf("%s", rel);
	NEXT_taken++;
    } else
	NEXTPrintf("%s", abso);
    NEXT_relative_ok = TRUE;
    NEXT_path_count += 1;

    NEXT_pen_x = x;
    NEXT_pen_y = y;
}

TERM_PUBLIC void
NEXT_vector(x, y)
unsigned int x, y;
{
    int dx, dy;
    char abso[20], rel[20];
    dx = x - NEXT_pen_x;
    dy = y - NEXT_pen_y;
    if (dx == 0 && dy == 0)
	return;
    sprintf(abso, "%d %d L\n", x, y);
    sprintf(rel, "%d %d V\n", dx, dy);
    if (strlen(rel) < strlen(abso) && NEXT_relative_ok) {
	NEXTPrintf("%s", rel);
	NEXT_taken++;
    } else
	NEXTPrintf("%s", abso);
    NEXT_relative_ok = TRUE;
    NEXT_path_count += 1;
    NEXT_pen_x = x;
    NEXT_pen_y = y;
    if (NEXT_path_count >= 400) {
	NEXTPrintf("currentpoint stroke M\n");
	NEXT_path_count = 0;
    }
}




TERM_PUBLIC int
NEXT_text_angle(ang)
int ang;
{
    NEXT_ang = ang;
    return TRUE;
}


TERM_PUBLIC int
NEXT_justify_text(mode)
enum JUSTIFY mode;
{
    NEXT_justify = mode;
    return TRUE;
}


TERM_PUBLIC int
NEXT_set_font(font) /* Entry font added by DJL */
const char *font;
{
    char name[32];
    int size, sep;

    if (!font || !(*font))
	font = NEXT_default_font;
    sep = strcspn(font, ",");
    strncpy(name, font, sep);
    name[sep] = NUL;
    size = NEXT_fontsize;
    if (font[set] == ',')
	sscanf(&(font[sep + 1]), "%d", &size);
    NEXTPrintf("/%s findfont %d scalefont setfont\n", name, size * NEXT_SC);
    NEXT_RememberFont(name);
    term->v_char = (unsigned int) (size * NEXT_SC);
    term->h_char = (unsigned int) (size * NEXT_SC * 6 / 10);
    return TRUE;
}


/* postscript point routines */

TERM_PUBLIC void
NEXT_set_pointsize(size)
double size;
{
    NEXTPrintf("/vpt %.1f def /hpt %.1f def /vpt2 vpt 2 mul def /hpt2 hpt 2 mul def\n",
	       pointsize * NEXT_VTIC * 0.5, pointsize * NEXT_HTIC * 0.5);
}

TERM_PUBLIC void
NEXT_point(x, y, number)
unsigned int x, y;
int number;
{
    static char *pointFNS[] =
    {"Pnt", "Pls", "Crs", "Star",
     "Box", "BoxF", "Circle", "CircleF",
     "TriU", "TriUF", "TriD", "TriDF",
     "Dia", "DiaF", "Pent", "PentF",
     "C0", "C1", "C2", "C3",
     "C4", "C5", "C6", "C7",
     "C8", "C9", "C10", "C11",
     "C12", "C13", "C14", "C15",
     "S0", "S1", "S2", "S3",
     "S4", "S5", "S6", "S7",
     "S8", "S9", "S10", "S11",
     "S12", "S13", "S14", "S15",
     "D0", "D1", "D2", "D3",
     "D4", "D5", "D6", "D7",
     "D8", "D9", "D10", "D11",
     "D12", "D13", "D14", "D15"
    };
    if (number < 0)
	number = -1;		/* negative types are all 'dot' */
    else
	number %= sizeof(pointFNS) / sizeof(pointFNS[0]) - 1;
    NEXTPrintf("%d %d %s\n", x, y, pointFNS[number + 1]);

    NEXT_relative_ok = 0;
    NEXT_path_count = 0;
    NEXT_linetype_last = -1;	/* force next linetype change */
}




/* All lifted from the enhanced postscript driver */



static TBOOLEAN NEXT_opened_string;	/* try to cut out empty ()'s */

/* used in determining height of processed text */

static float NEXT_max_height, NEXT_min_height;


/* process a bit of string, and return the last character used.
 * p is start of string
 * brace is TRUE to keep processing to }, FALSE for do one character
 * fontname & fontsize are obvious
 * base is the current baseline
 * widthflag is TRUE if the width of this should count,
 *              FALSE for zero width boxes
 */

static char *
NEXT_recurse(p, brace, fontname, fontsize, base, widthflag)
char *p, *fontname;
TBOOLEAN brace, widthflag;
double fontsize, base;
{

/* close a postscript string if it has been opened */
#define NEXT_FLUSH      \
{	if (NEXT_opened_string)  \
	{	NEXTPrintf("%s", ")]\n");   \
		NEXT_opened_string = FALSE; \
	}                         \
}

#define NEXT_OPEN	\
{	if (!NEXT_opened_string) \
	{ NEXTPrintf( "[(%s) %.1f %.1f %s (",  \
		  fontname, fontsize, base, \
		  widthflag ? "true" : "false");  \
	  NEXT_opened_string = TRUE; \
	}	\
}


    /* Start each recursion with a clean string */
    NEXT_FLUSH;

	if (base + fontsize > NEXT_max_height) {
	NEXT_max_height = base + fontsize;
    }
    if (base < NEXT_min_height) {
	NEXT_min_height = base;
    }
    for (; *p; ++p) {
	float shift;
	float f = 0;		/* used for getting new font size */
	char *localfontname, ch;

	switch (*p) {
	case '}':
	    if (brace)
		return (p);

	    fprintf(stderr, "next driver - spurious }\n");
	    break;

	case '_':
	case '^':
	    shift = (*p == '^') ? 0.5 : -0.3;

	    NEXT_FLUSH;

		p = NEXT_recurse(p + 1, FALSE, fontname, fontsize * 0.8,
				 base + shift * fontsize, widthflag);

	    break;

	case '{':
	    /*{{{  recurse (possibly with a new font) */

	    if (*++p == '/') {	/* then parse a fontname, optional fontsize */
		while (*++p == ' ');
		localfontname = p;
		while ((ch = *p) > ' ' && ch != '=')
		    ++p;
		if (ch == '=') {
		    *p++ = '\0';
		    /*{{{  get optional font size */
		    f = (float) strtod(p, &p);

		    if (f)
			f *= NEXT_SC;	/* remember the scaling */
		    else
			f = fontsize;

		    /*}}} */
		} else {
		    *p++ = '\0';
		    f = fontsize;
		}

		while (*p == ' ')
		    ++p;
		if (*localfontname)
		    localfontname = NEXT_RememberFont(localfontname);
		else
		    localfontname = fontname;
	    } else {
		localfontname = fontname;
		f = fontsize;
	    }
	    /*}}} */


	    p = NEXT_recurse(p, TRUE, localfontname, f, base, widthflag);


	    NEXT_FLUSH

		break;

	case '@':
	    /*{{{  phantom box - prints next 'char', then restores currentpoint */

	    NEXT_FLUSH

		p = NEXT_recurse(++p, FALSE, fontname, fontsize, base, FALSE);

	    break;
	    /*}}} */

	case '(':
	case ')':
	    /* special cases */
	    NEXT_OPEN
		NEXTPrintf("\\");
	    NEXTPrintf("%c", *p);
	    break;
	    /*}}} */

	case '\\':
	    /*{{{  is it an escape */
	    /* special cases */

	    if (p[1] == '\\' || p[1] == '(' || p[1] == ')') {
		NEXT_OPEN
		    NEXTPrintf("%c", '\\');
	    } else if ((ch = p[1]) >= '0' && ch <= '7') {
		/* up to 3 octal digits */
		NEXT_OPEN
		    NEXTPrintf("%c", '\\');
		NEXTPrintf("%c", ch);
		++p;
		if ((ch = p[1]) >= '0' && ch <= '7') {
		    NEXTPrintf("%c", ch);
		    ++p;
		    if ((ch = p[1]) >= '0' && ch <= '7') {
			NEXTPrintf("%c", ch);
			++p;
		    }
		}
		break;
	    }
	    ++p;
	    /* just go and print it (fall into the 'default' case) */

	    /*}}} */
	default:
	    NEXT_OPEN

		NEXTPrintf("%c", *p);
	}

	/* like TeX, we only do one character in a recursion, unless it's
	 * in braces
	 */

	if (!brace) {
	    NEXT_FLUSH
		return (p);	/* the ++p in the outer copy will increment us */
	}
    }
    NEXT_FLUSH
	return p;
}


TERM_PUBLIC void
NEXT_put_text(x, y, str)
    unsigned int x, y;
    const char *str;
{
    /* flush any pending graphics (all the XShow routines do this...) */

    if (!strlen(str))
	return;

    if (NEXT_path_count) {
	NEXTPrintf(" stroke\n");
	NEXT_path_count = 0;
	NEXT_relative_ok = FALSE;
    }
    NEXT_move(x, y);

    if (NEXT_ang != 0)
	NEXTPrintf("currentpoint gsave translate %d rotate 0 0 moveto\n",
		   NEXT_ang);

    NEXTPrintf("[ ");

    /* set up the globals */

    NEXT_opened_string = FALSE;
    NEXT_max_height = -1000;
    NEXT_min_height = 1000;

    while (*(str = NEXT_recurse(str, TRUE, NEXT_font,
				(double) term->v_char,
				0.0, TRUE)));

    NEXT_max_height += NEXT_min_height;

    NEXTPrintf("] %.1f ", -NEXT_max_height / 3);

    switch (NEXT_justify) {
    case LEFT:
	NEXTPrintf("MLshow\n");
	break;
    case CENTRE:
	NEXTPrintf("MCshow\n");
	break;
    case RIGHT:
	NEXTPrintf("MRshow\n");
	break;
    }

    if (NEXT_ang != 0)
	NEXTPrintf("grestore\n");
    NEXT_path_count = 0;
    NEXT_relative_ok = FALSE;
}



/*
static TBOOLEAN
NEXT_colordetect()
{
	NXScreen * mainscreen;

	mainscreen = [Application mainScreen];
	if (mainscreen->depth == NX_TwoBitGrayDepth) return(FALSE);
	return(TRUE);
}
*/

	/* This just packs all the postscript into one (possibly huge) string 
	 * which will be passed (as a fake pointer) via D.O. to the server 
	 */

void
NEXTPrintf(char *fmt,...)
{
    va_list ap;
    char *pb;
    int NEXToff;

    /* Process formatting instructions */
    va_start(ap, fmt);
    vsprintf(NEXTTmpBuf, fmt, ap);
    va_end(ap);

    /* Add to buffer */
    for (pb = NEXTTmpBuf; (*pb != 0); ++pb, ++NEXTBufAt) {
	/* reallocate if necessary */
	if (NEXTBufAt >= NEXTBufEnd) {
	    NEXToff = NEXTBufAt - NEXTBuffer;
	    NEXTsize *= 2;
	    NEXTBuffer = realloc(NEXTBuffer, NEXTsize);
	    NEXTBufEnd = NEXTBuffer + NEXTsize;
	    NEXTBufAt = NEXTBuffer + NEXToff;
	}
	*NEXTBufAt = *pb;
    }

    return;

}

/*  This next section implements the GnuTermDriver object which manages
	the D.O. connection and interface to OBjC 
*/


@protocol GnuTermServerMethods
/*- (oneway) executePScode:(in char *)PStext termTitle:(in char *)title;*/
- executePScode:(in char *)
PStext termTitle:(in char *) title;
@end


@implementation GnuTermDriver

- init
{
    NXConnection *myConnection;
    char serverpath[100], *envstring;
    int GnuTermPathSet = 0;


    /* Ask OS for connection to server */
  server =[NXConnection connectToName:"gnuplotServer"];

    /* Server is running ready to go */
    if (server)			/*printf("Connected to server\n") */
	;

    /* Server isn't running, we must fire it up */
    else {
	/*printf("Launching GnuTerm\n"); */
	*serverpath = 0;

	/* Check for path set in environment */
	if ((envstring = getenv("GNUTERMPATH")) != (char *) NULL) {
	    sprintf(serverpath, "%s/GnuTerm.app/GnuTerm", envstring);
	    GnuTermPathSet = 1;
	}
	/* Not in environment */
	else
	    strcpy(serverpath, "GnuTerm");

	/* Try to launch application */
      if ([[Application workspace] launchApplication:serverpath] == NO) {
	    printf("Failed to launch %s.\n", serverpath);
	    /* Offer a little advice */
	    if (GnuTermPathSet) {
		printf("You must have setenv GNUTERMPATH to something wrong\n");
		printf("I recommend you exit gnuplot and fix this.\n");
	    } else {
		printf("It must be located in ~/Apps or /LocalApps\n");
		printf("I recommend that you either\n");
		printf("- move GnuTerm.app to one of these locations\n");
		printf("- set GNUTERMPATH with host%%  setenv GNUTERMPATH /directory/containing_GnuTerm.app\n");
		printf("- start GnuTerm ahead of the first plot command\n");
#ifdef NEXT_OLDTERMINAL
		printf("- use the old driver version (set term next old)\n");
#endif
	    }
	}
	/* I wish the gnuplot terminal interface would 
	   let me return an error here.
	 */

	/* Application is launching */
	else {
	    /* Wait for it to register Server methods with OS */
	    do {
	      server =[NXConnection connectToName:"gnuplotServer"];
	    } while (!server);	/* This could result in a hang, 
				   but I've never seen it fail */
	}
    }


    /* By limiting ourselves to known protocol
     * we speed up the messaging 
     */
  [server setProtocolForProxy:@protocol(GnuTermServerMethods)];

    myConnection =[server connectionForProxy];

    /* If the server dies we want to know about it */
  [myConnection registerForInvalidationNotification:self];
    /* In fact, we'll worry about it */
    [NXPort worryAboutPortInvalidation];

    return self;
}


-plot:(char *) PSstr;
{
    /* If server has become invalid, re-initialize */
    if (!server)
	[self init];

    /* This is where we send the huge postscript string to the server 
       Note:
       The D.O. system doesn't actually give this pointer to the server.  
       The pointer is dereferenced on the client side and the
       resulting data is sent to the server. On the server side, 
       space for the data is automatically allocated, and a pointer to
       the local data is received.
       For details check out:
       /NextLibrary/Documentation/NextDev/GeneralRef/06_DistributedObjects/IntroDistObjects.rtf
     */

    /*printf("Calling server..."); */
  [server executePScode: PSstr termTitle:NEXT_title];
    /*printf("returned\n"); */
    *NEXT_title = 0;

    return self;
}

							/* This gets called by OS if server goes down */
-senderIsInvalid:(id) sender
{
    server = 0;
}

@end

#ifdef NEXT_OLDTERMINAL

static void
window_create()
{
    float width, height;

    width = (xsize * (NEXT_XMAX) / NEXT_SC + 0.5 + NEXT_XOFF);
    height = (ysize * (NEXT_YMAX) / NEXT_SC + 0.5 + NEXT_YOFF);

    NXApp =[EpsViewer new];
  [NXApp windowCreate: width Height:height];
}

@implementation EpsViewer

- windowCreate:(NXCoord)
width Height:(NXCoord) height
{

    /* create the new window, in a good place */
    theNewWin =[Window
  newContent: [self nextRectForWidth: width Height:height]
  style:	NX_TITLEDSTYLE
  backing:	NX_RETAINED
  buttonMask:	(NX_CLOSEBUTTONMASK | NX_MINIATURIZEBUTTONMASK)
  defer:	NO];
    /* we need to receive windowDidBecomeMain: and windowDidResignMain: */
  [theNewWin setDelegate:self];
    /*
     * create a new View, make it the contentView of our new window,
     * and destroy the window's old contentView 
     */
  [[theNewWin setContentView:[[View alloc] init]] free];
    /* display the window, and bring it forth */
    [theNewWin display];
  [theNewWin makeKeyAndOrderFront:self];
/*	[theNewWin orderBack:self];			*/
    /* show the frame */
    return self;
}

/***************************************************************************/
/* nextRectForWidth:Height: - return the next good content rectangle       */
/*  from Carl F. Sutter's wonderful ViewGif2 'Controller' method...        */
/***************************************************************************/
/* nextTopLeft - return the next good top left window position		   */
/***************************************************************************/

-(NXRect *) nextRectForWidth:(NXCoord)
width Height:(NXCoord) height
{
#define OFFSET 10.0
#define MAX_STEPS 20
#define INITIAL_X 356.0
#define INITIAL_Y 241.0
    NXPoint nxpTopLeft;
    NXRect nxrTemp;		/* used to find window height    */
    NXRect nxrWinHeight;	/* bounds of enclosing window    */
    NXSize nxsScreen;		/* size of screen                */
    static NXRect nxrResult;	/* the Answer!                   */
    static int nCurStep = 0;

    /* find a good top-left coord */
    nxpTopLeft.x = INITIAL_X + nCurStep * OFFSET;
    nxpTopLeft.y = INITIAL_Y + nCurStep * OFFSET;
    if (++nCurStep > MAX_STEPS)
	nCurStep = 0;
    /* find window height using nxrTemp */
    nxrTemp.size.width = width;
    nxrTemp.size.height = height;
    nxrTemp.origin.x = nxrTemp.origin.y = 0;
  [Window getFrameRect: &nxrWinHeight forContentRect:&nxrTemp
  style:NX_TITLEDSTYLE];
  [NXApp getScreenSize:&nxsScreen];
    /* find the lower-left coord */
    nxrResult.origin.x = nxpTopLeft.x;
    nxrResult.origin.y = nxsScreen.height - nxrWinHeight.size.height - nxpTopLeft.y;
    nxrResult.size.width = width;
    nxrResult.size.height = height;
    return (&nxrResult);
}

@end
#endif /* NEXT_OLDTERMINAL */


#endif /* TERM_BODY */

#ifdef TERM_TABLE


TERM_TABLE_START(next_driver)
    "next",
    "Interface to GnuTerm.app under NeXTstep",
    NEXT_XMAX, NEXT_YMAX, NEXT_VCHAR, NEXT_HCHAR,
    NEXT_VTIC, NEXT_HTIC, NEXT_options, NEXT_init, NEXT_reset,
    NEXT_text, null_scale, NEXT_graphics, NEXT_move, NEXT_vector,
    NEXT_linetype, NEXT_put_text, NEXT_text_angle,
    NEXT_justify_text, NEXT_point, do_arrow, NEXT_set_font,
    NEXT_set_pointsize
TERM_TABLE_END(next_driver)

#undef LAST_TERM
#define LAST_TERM next_driver

#endif /* TERM_TABLE */
#endif /* TERM_PROTO_ONLY */


#define TERM_HELP_NEXT

#ifdef TERM_HELP
START_HELP(next)
"1 next",
"?commands set terminal next",
"?set terminal next",
"?set term next",
"?terminal next",
"?term next",
"?next",
"?NeXT",
" Several options may be set in the next driver.",
"",
" Syntax:",
"       set terminal next {<mode>} {<type> } {<color>} {<dashed>}",
"                  {\"<fontname>\"} {<fontsize>} title {\"<newtitle>\"}",
"",
" where <mode> is  `default`, which sets all options to their defaults;",
" <type> is either `new` or `old`, where `old` invokes the old single window;",
" <color> is either `color` or `monochrome`;",
" <dashed> is either `solid` or `dashed`;",
" \"<fontname>\" is the name of a valid PostScript font;",
" <fontsize> is the size of the font in PostScript points; and",
" <title> is the title for the GnuTerm window.",
" Defaults are  `new`, `monochrome`, `dashed`, \"Helvetica\", 14pt.",
"",
" Examples:",
"       set term next default",
"       set term next 22",
"       set term next color \"Times-Roman\" 14",
"       set term next color \"Helvetica\" 12 title \"MyPlot\"",
"       set term next old",
"",
" Pointsizes may be changed with `set linestyle`."
END_HELP(next)
#endif /* TERM_HELP */