/*
 * $Id: $
 */

/* GNUPLOT - pm.trm */

/*[
 * Copyright 1992, 1993, 1998
 *
 * 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.
]*/

/*
 *    pm.trm  --- inboard terminal driver for Presentation Manager
 *            --- after X-11 driver, by R.W.Fearick 31/1/92.
 *    v1.1 11/8/92 -- speed things up
 */

#include "driver.h"

#ifdef TERM_REGISTER
register_term(pm)
#endif

#ifdef TERM_PROTO
TERM_PUBLIC void PM_init __PROTO((void));
TERM_PUBLIC void PM_options __PROTO((void));
TERM_PUBLIC void PM_reset __PROTO((void));
TERM_PUBLIC void PM_text __PROTO((void));
TERM_PUBLIC void PM_graphics __PROTO((void));
TERM_PUBLIC void PM_linetype __PROTO((int lt));
TERM_PUBLIC void PM_move __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void PM_vector __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC int PM_text_angle __PROTO((int ang));
TERM_PUBLIC void PM_put_text __PROTO((unsigned int x, unsigned int y, char *str));
TERM_PUBLIC int PM_justify_text __PROTO((enum JUSTIFY mode));
TERM_PUBLIC void PM_point __PROTO((unsigned int x, unsigned int y, int number));
TERM_PUBLIC void PM_suspend __PROTO((void));
TERM_PUBLIC void PM_resume __PROTO((void));
TERM_PUBLIC void PM_linewidth __PROTO((double linewidth));

/* define PM world coordinate limits */

#define PM_XMAX 19500
#define PM_YMAX 12500

/* approximations for typical font/screen sizes */
#define PM_VCHAR (550)
#define PM_HCHAR (220)
#define PM_VTIC (200)
#define PM_HTIC (200)
#endif

#ifdef TERM_BODY

#include <stdio.h>
#include <process.h>
#include <io.h>
#define INCL_DOSPROCESS
#define INCL_DOSSEMAPHORES
#define INCL_DOSMISC
#define INCL_DOSMODULEMGR
#include <os2.h>


/* graphics commands */
#define SET_GRAPHICS    'G'
#define SET_TEXT        'E'
#define SET_LINE        'L'
#define SET_LINEWIDTH   'W'
#define SET_ANGLE       'A'
#define SET_JUSTIFY     'J'
#define SET_POINTMODE   'D'
#define SET_FONT        'F'
#define SET_OPTIONS     'O'
#define GR_QUERY        'Q'
#define GR_SUSPEND      'E'	/*'s' */
#define GR_RESUME       'r'
#define GR_MOVE         'M'
#define GR_DRAW         'V'
#define GR_RESET        'R'
#define GR_TEXT         'T'
#define GR_PAUSE        'P'
#define GR_HELP         'H'
#define PM_nopts 1

/* path for pm program */
static char PM_path[256] = "";
/* track mode to avoid redraw after hitting break */
static int PM_mode = 0;
static HEV hev;
static int PM_termmode = 0;
static int PM_must_reset_opts = FALSE;
static int PM_must_abort = 0;

static char PM_opts[256] = "";
static int PM_optargs = 0;
static int PM_plot_number = 0;
static char PM_term_title[128] = "";

FILE *fopen();
static FILE *PM_pipe = NULL;
static FILE *PM_savepipe = NULL;

int PM_pause __PROTO((char *str));
void PM_setup(void);
static void PM_reset_opts(void);
static void PM_query(void);
static void PM_make_servername(char *);
static void PM_abortplot();

TERM_PUBLIC void PM_init()
{
    static char buffer[1024];
    int pid;
    int rc;
    int spawnmode;
    PPIB pib;
    PTIB tib;
    char semname[32];
    char pipename[32];
    char tempname[32];

    term_force_init = TRUE;
    if (PM_savepipe != NULL && PM_termmode == 0) {
	PM_pipe = PM_savepipe;
    }
    if ((PM_pipe == NULL) && (PM_termmode & 2)) {
	/* check if term is running */
	PM_make_servername(tempname);
	strcpy(pipename, "\\pipe\\");
	strcat(pipename, tempname);
//        sprintf( pipename, "\\pipe\\gpServ%d", PM_plot_number ) ;
	DosGetInfoBlocks(&tib, &pib);
	PM_pipe = fopen(pipename, "r+b");
	if (PM_pipe != NULL) {
	    setvbuf(PM_pipe, buffer, _IOFBF, 1024);
	    pid = pib->pib_ulpid;
	    fwrite(&pid, 1, 4, PM_pipe);
	    fflush(PM_pipe);
	    /* set new options */
//            PM_reset_opts() ;
	}
    }
    /* else we start up term here */
    if (PM_pipe == NULL) {
	if (PM_termmode & 2) {
	    PM_make_servername(tempname);
//            sprintf( tempname, "gpServ%d", PM_plot_number ) ;
	} else {
	    static int gpid = 0;
	    gpid++;
	    sprintf(tempname, "gp%X%d", getpid(), gpid);
	}
	strcpy(semname, "\\sem32\\");
	strcpy(pipename, "\\pipe\\");
	strcat(semname, tempname);
	strcat(pipename, tempname);
	strcat(PM_path, "\\gnupmdrv.exe");
	rc = access(PM_path, 0);
	/* find exe file */
	if (rc != 0)
	    rc = DosSearchPath(0x0002,	/* search GNUPLOT environment */
			       "GNUPLOT",
			       "gnupmdrv.exe",
			       PM_path,
			       256);

	if (rc != 0)
	    rc = DosSearchPath(0x0003,	/* then try current directory & path */
			       "PATH",
			       "gnupmdrv.exe",
			       PM_path,
			       256);
	if (rc != 0) {
	    fputs("Cannot find gnupmdrv.exe !\n", stderr);
	    exit(3);
	}
	rc = DosCreateEventSem(semname, &hev, 1, 0);
	if (rc != 0) {
	    fputs("Cannot create semaphore !\n", stderr);
	    exit(3);
	}
	spawnmode = P_SESSION | P_DEFAULT;
	if (PM_optargs != 0)
	    spawnmode |= P_UNRELATED;
	pid = spawnl(spawnmode, PM_path, "GnuplotPM", tempname, PM_opts, NULL);
	if (pid == -1) {
	    fputs("Cannot spawn gnupmdrv.exe !\n", stderr);
	    exit(3);
	}
	DosGetInfoBlocks(&tib, &pib);
	DosWaitEventSem(hev, 10000);
	DosCloseEventSem(hev);
	PM_pipe = fopen(pipename, "r+b");
	if (PM_pipe == NULL) {
	    fputs("Cannot open pipe to gnupmdrv.exe !\n", stderr);
	    exit(3);
	} else if (PM_termmode == 0)
	    PM_savepipe = PM_pipe;
	setvbuf(PM_pipe, buffer, _IOFBF, 1024);
	pid = pib->pib_ulpid;
	fwrite(&pid, 1, 4, PM_pipe);
	fflush(PM_pipe);
    } else {
	if (PM_must_reset_opts)
	    PM_reset_opts();
    }
    PM_query();
}

static void PM_make_servername(char *str)
{
    if (PM_term_title[0]) {
	int hash = 0;
	char *p = PM_term_title + 1;
	int match = PM_term_title[0];
	while (*p != match) {
	    hash = (hash << 1) + hash + *p++;
	}
	hash %= (256 * 256 * 256 - 1);
	sprintf(str, "gp%x", hash);
    } else
	sprintf(str, "gpServ%d", PM_plot_number);
}


TERM_PUBLIC void PM_options()
{
    int old_termmode = PM_termmode;
    PM_termmode = 0;
    term_options[0] = NUL;
    PM_term_title[0] = NUL;
    PM_opts[0] = NUL;
    PM_optargs = 0;
    while (!END_OF_COMMAND) {
	if (almost_equals(c_token, "pe$rsist")) {
	    strcat(PM_opts, "-p ");
	    strcat(term_options, "persist ");
	    PM_termmode |= 1;
	    PM_optargs = 1;
	    if (!(old_termmode & 1))
		PM_pipe = NULL;
	} else if (almost_equals(c_token, "s$erver")) {
	    strcat(PM_opts, "-s ");
	    strcat(term_options, "server ");
	    PM_termmode |= 2;
	    PM_optargs = 1;
	    if (!(old_termmode & 2))
		PM_pipe = NULL;
	    if (isanumber(c_token + 1)) {
		struct value t;
		char *p = PM_opts + strlen(PM_opts);
		c_token++;
		PM_plot_number = (int) real(const_express(&t));
		sprintf(p, "%d", PM_plot_number);
		sprintf(term_options + strlen(term_options), "%d", PM_plot_number);
	    }
	} else if (almost_equals(c_token, "w$idelines")) {
	    strcat(PM_opts, "-w ");
	    strcat(term_options, "widelines ");
	    PM_optargs = 1;
	} else if (almost_equals(c_token, "e$nhanced")) {
	    strcat(PM_opts, "-e ");
	    strcat(term_options, "enhanced ");
	    PM_optargs = 1;
	} else if (isstring(c_token)) {
	    copy_str(PM_term_title, c_token, 127);
	}
#if 0
	else if (almost_equals(c_token, "po$rtrait")) {
	    strcat(PM_opts, "-l ");
	    strcat(term_options, "portrait ");
	    PM_optargs = 1;
	}
#endif
	c_token++;
    }
    if (PM_term_title[0]) {
	strcat(PM_opts, " ");
	strcat(term_options, " ");
	strcat(PM_opts, PM_term_title);
	strcat(term_options, PM_term_title);
    }
    PM_must_reset_opts = TRUE;
}

static void PM_reset_opts()
{
    int len;
    putc(SET_OPTIONS, PM_pipe);
    len = strlen(PM_opts) + 1;
    fwrite(&len, sizeof(int), 1, PM_pipe);
    fwrite(PM_opts, 1, len, PM_pipe);
    for (len = sizeof(int) - len % sizeof(int); len > 0; len--) {
	/* pad rest of int with zeros */
	putc(NUL, PM_pipe);
    }
    fflush(PM_pipe);
    PM_must_reset_opts = FALSE;
}

static void PM_query()
{
    int rc;
    ULONG cbR;
    putc(GR_QUERY, PM_pipe);
    fflush(PM_pipe);
    rc = DosRead(fileno(PM_pipe), &term->h_char, sizeof(int), &cbR);
    rc = DosRead(fileno(PM_pipe), &term->v_char, sizeof(int), &cbR);
}

TERM_PUBLIC void PM_reset()
{
    putc(GR_RESET, PM_pipe);
    fflush(PM_pipe);
    term_force_init = FALSE;
    if (PM_termmode > 0) {
	fclose(PM_pipe);
	PM_pipe = NULL;
    }
}

TERM_PUBLIC void PM_suspend()
{
    putc(GR_SUSPEND, PM_pipe);
    fflush(PM_pipe);
}

TERM_PUBLIC void PM_resume()
{
    putc(GR_RESUME, PM_pipe);
    fflush(PM_pipe);
}

TERM_PUBLIC void PM_text()
{
    fflush(PM_pipe);
    if (PM_mode != SET_TEXT) {
	putc(SET_TEXT, PM_pipe);
	fflush(PM_pipe);
//        keep_term_initialised = term_initialised ;
//        term_initialised = FALSE ; /* need to force init */
    }
    PM_mode = SET_TEXT;
}

TERM_PUBLIC void PM_graphics()
{
    putc(SET_GRAPHICS, PM_pipe);
    fflush(PM_pipe);
    PM_mode = SET_GRAPHICS;
}

TERM_PUBLIC void PM_move(unsigned int x, unsigned int y)
{
    if (PM_must_abort)
	PM_abortplot();
    putc(GR_MOVE, PM_pipe);
    fwrite(&x, sizeof(int), 1, PM_pipe);
    fwrite(&y, sizeof(int), 1, PM_pipe);
}

TERM_PUBLIC void PM_vector(unsigned int x, unsigned int y)
{
    if (PM_must_abort)
	PM_abortplot();
    putc(GR_DRAW, PM_pipe);
    fwrite(&x, sizeof(int), 1, PM_pipe);
    fwrite(&y, sizeof(int), 1, PM_pipe);
}

TERM_PUBLIC void PM_linetype(int lt)
{
    putc(SET_LINE, PM_pipe);
    fwrite(&lt, sizeof(int), 1, PM_pipe);
}

TERM_PUBLIC int PM_text_angle(int ang)
{
    putc(SET_ANGLE, PM_pipe);
    fwrite(&ang, sizeof(int), 1, PM_pipe);
    return (TRUE);
}

TERM_PUBLIC void PM_put_text(unsigned int x, unsigned int y, char *str)
{
    int len;
    if (PM_must_abort)
	PM_abortplot();
    putc(GR_TEXT, PM_pipe);
    fwrite(&x, sizeof(int), 1, PM_pipe);
    fwrite(&y, sizeof(int), 1, PM_pipe);
    len = strlen(str) + 1;
    fwrite(&len, sizeof(int), 1, PM_pipe);
    fwrite(str, 1, len, PM_pipe);
    for (len = sizeof(int) - len % sizeof(int); len > 0; len--) {
	/* pad rest of int with zeros */
	putc(NUL, PM_pipe);
    }
}

TERM_PUBLIC int PM_justify_text(enum JUSTIFY mode)
{
    putc(SET_JUSTIFY, PM_pipe);
    fwrite(&mode, sizeof(int), 1, PM_pipe);
    return (TRUE);
}

TERM_PUBLIC int PM_set_font(font) /* Entry font added by DJL */
char *font;
{
    int len, fontsize;
    char *p;
    p = strchr(font, ',');
    if (p == NULL || *p == NUL)
	fontsize = 14;
    else
	fontsize = strtol(p + 1, NULL, 10);
    if (fontsize <= 0)
	fontsize = 14;
    putc(SET_FONT, PM_pipe);
    len = strlen(font) + 1;
    fwrite(&len, sizeof(int), 1, PM_pipe);
    fwrite(font, 1, len, PM_pipe);
    for (len = sizeof(int) - len % sizeof(int); len > 0; len--) {
	/* pad rest of int with zeros */
	putc(NUL, PM_pipe);
    }
    return TRUE;
}


TERM_PUBLIC void PM_point(unsigned int x, unsigned int y, int number)
/*
** tell the driver we are plotting a point so it can decide whether to
** use colour or not
*/
{
    int mode;
    mode = 1;
    putc(SET_POINTMODE, PM_pipe);
    fwrite(&mode, sizeof(int), 1, PM_pipe);
    do_point(x, y, number);
    mode = 0;
    putc(SET_POINTMODE, PM_pipe);
    fwrite(&mode, sizeof(int), 1, PM_pipe);
}

void PM_abortplot()
{
    PM_must_abort = 0;
    term_reset();
    (void) putc('\n', stderr);
    bail_to_command_line();
}

void PM_intc_cleanup()
{
    if (PM_pipe == NULL || PM_mode == SET_TEXT)
	PM_abortplot();
    PM_must_abort = 1;
}

void PM_setup(void)
/*
** Initial terminal setup
*/
{
    char *envpath;
    PPIB pib;
    PTIB tib;
    char path[256], *p;
    DosGetInfoBlocks(&tib, &pib);
    DosQueryModuleName(pib->pib_hmte, 256, path);
    if (PM_path[0] == NUL) {
	strcpy(PM_path, path);
	p = strrchr(PM_path, '\\');
	if (p != NULL)
	    *p = NUL;
	else {
	    p = strrchr(PM_path, ':');
	    if (p != NULL)
		*(p + 1) = NUL;
	}
	if (p == NULL)
	    _getcwd2(PM_path, 256);
    }
    if (getenv("GNUHELP") == NULL) {
	int n = strlen("GNUHELP") + strlen(PM_path) + strlen("gnuplot.gih") + 3;
	envpath = (char *) malloc(n);
	if (envpath != NULL) {
	    strcpy(envpath, "GNUHELP");
	    strcat(envpath, "=");
	    strcat(envpath, PM_path);
	    strcat(envpath, "/");
	    strcat(envpath, "gnuplot.gih");
	    putenv(envpath);
	}
    }
    if (getenv("GNUPLOT") == NULL) {
	int n = strlen("GNUPLOT") + strlen(PM_path) + 2;
	envpath = (char *) malloc(n);
	if (envpath != NULL) {
	    strcpy(envpath, "GNUPLOT");
	    strcat(envpath, "=");
	    strcat(envpath, PM_path);
	    putenv(envpath);
	}
    }
}

int PM_pause(char *str)
/*
** pause - using message box on PM screen
*/
{
    int len, rc;
    ULONG cbR;
    char buf[256];
    char *bp;

    if (PM_pipe == NULL)
	return 2;
    bp = buf;
    putc(GR_PAUSE, PM_pipe);
    len = strlen(str) + 1;
    fwrite(&len, sizeof(int), 1, PM_pipe);
    fwrite(str, 1, len, PM_pipe);
    for (rc = sizeof(int) - len % sizeof(int); rc > 0; rc--) {
	/* pad rest of int with zeros */
	putc(NUL, PM_pipe);
    }
    fflush(PM_pipe);
    rc = DosRead(fileno(PM_pipe), &len, sizeof(int), &cbR);
    return len;
}

TERM_PUBLIC void PM_linewidth(double linewidth)
{
    int lw;
    lw = linewidth * 100;
    putc(SET_LINEWIDTH, PM_pipe);
    fwrite(&lw, sizeof(int), 1, PM_pipe);
}

#endif

#ifdef TERM_TABLE
TERM_TABLE_START(PM_driver)
    "pm", "OS/2 Presentation Manager",
    PM_XMAX, PM_YMAX, PM_VCHAR, PM_HCHAR,
    PM_VTIC, PM_HTIC, PM_options, PM_init, PM_reset,
    PM_text, null_scale, PM_graphics, PM_move, PM_vector,
    PM_linetype, PM_put_text, PM_text_angle,
    PM_justify_text, PM_point, do_arrow, PM_set_font,
    0 /*pointsize */ , TERM_CAN_MULTIPLOT, PM_suspend, PM_resume,
    0 /*fillbox */ , PM_linewidth
TERM_TABLE_END(PM_driver)

#undef LAST_TERM
#define LAST_TERM PM_driver

#endif /* TERM_TABLE */

#ifdef TERM_HELP
START_HELP(pm)
"1 pm",
"?commands set terminal pm",
"?set terminal pm",
"?set term pm",
"?terminal pm",
"?term pm",
"?pm",
" The `pm` terminal driver provides an OS/2 Presentation Manager window in",
" which the graph is plotted.  The window is opened when the first graph is",
" plotted.  This window has its own online help as well as facilities for",
" printing, copying to the clipboard and some line type and color adjustments.",
" The `multiplot` option is supported.",
"",
" Syntax:",
"       set terminal pm {server {n}} {persist} {widelines} {enhanced} {\"title\"}",
"",
" If `persist` is specified, each graph appears in its own window and all",
" windows remain open after `gnuplot` exits.  If `server` is specified, all",
" graphs appear in the same window, which remains open when `gnuplot` exits.",
" This option takes an optional numerical argument which specifies an instance",
" of the server process.  Thus multiple server windows can be in use at the",
" same time.",
"",
" If `widelines` is specified, all plots will be drawn with wide lines.  If",
" `enhanced` is specified, sub- and superscripts and multiple fonts are",
" enabled using the same syntax as the `enhanced postscript` option (see",
" `set terminal postscript enhanced` for details).  Font names for the basic",
" PostScript fonts may be abbreviated to single letters.",
"",
" If `title` is specified, it will be used as the title of the plot window.",
" It will also be used as the name of the server instance, and will override",
" the optional numerical argument.",
"",
" Linewidths may be changed with `set linestyle`."
END_HELP(pm)
#endif /* TERM_HELP */