File: eepic.trm

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/*
 * $Id: eepic.trm,v 1.8.2.2 2002/01/26 19:05:34 lhecking Exp $
 *
 */

/* GNUPLOT - eepic.trm */

/*[
 * Copyright 1990 - 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.
]*/

/*
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *   The EEPIC macros for LaTeX. 
 *
 * AUTHORS
 *   David Kotz
 *
 * send your comments or suggestions to (info-gnuplot@dartmouth.edu).
 * 
 */
/*
 *  This file contains the eepic terminal driver, intended for use with the 
 *  eepic.sty macro package for LaTeX. This is an alternative to the 
 *  latex driver. You need eepic.sty, epic.sty, and a printer driver that
 *  supports the tpic \specials.
 *
 * Although dotted and dashed lines are possible with EEPIC, and are
 * tempting, they do not work well for high-sample-rate curves, mushing
 * the dashes all together into a solid line. For now anyway, the EEPIC
 * driver will have only solid lines. Anyone got a solution?
 *
 * LATEX must also be defined.
 */
/*
 * adapted to the new terminal layout by Stefan Bodewig (Dec. 1995)
 */
/* Additions by Gabriel Zachmann (Gabriel.Zachmann@gmx.net), Nov 2000:
 * - little bug fix in stacked (faked rotated) text
 * - color support
 * - true rotated text
 * - augmented line types set with dashed lines
 * - optionally small or tiny point symbols
 * - font size
 */


#include "driver.h"

#ifdef TERM_REGISTER
register_term(eepic)
#endif

#ifdef TERM_PROTO

#include <ctype.h>

TERM_PUBLIC void EEPIC_init __PROTO((void));
TERM_PUBLIC void EEPIC_graphics __PROTO((void));
TERM_PUBLIC void EEPIC_text __PROTO((void));
TERM_PUBLIC void EEPIC_linetype __PROTO((int linetype));
TERM_PUBLIC void EEPIC_move __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void EEPIC_point __PROTO((unsigned int x, unsigned int y,
				      int number));
TERM_PUBLIC void EEPIC_vector __PROTO((unsigned int ux, unsigned int uy));
TERM_PUBLIC void EEPIC_arrow __PROTO((unsigned int sx, unsigned int sy,
				      unsigned int ex, unsigned int ey,
				      TBOOLEAN head));
TERM_PUBLIC void EEPIC_put_text __PROTO((unsigned int x, unsigned int y,
					 char str[]));
TERM_PUBLIC int EEPIC_justify_text __PROTO((enum JUSTIFY mode));
TERM_PUBLIC int EEPIC_text_angle __PROTO((int ang));
TERM_PUBLIC void EEPIC_reset __PROTO((void));
TERM_PUBLIC void EEPIC_options __PROTO((void));

#define EEPIC_PTS_PER_INCH 72.27
/* resolution of printer we expect to use */
#define EEPIC_DOTS_PER_INCH 600
/* dot size in pt */
#define EEPIC_UNIT (EEPIC_PTS_PER_INCH/EEPIC_DOTS_PER_INCH)

/* 5 inches wide by 3 inches high (default) */
#define EEPIC_XMAX (EEPIC_PTS_PER_INCH/EEPIC_UNIT*5.0)
#define EEPIC_YMAX (EEPIC_PTS_PER_INCH/EEPIC_UNIT*3.0)

#define EEPIC_HTIC (5.0/EEPIC_UNIT)
#define EEPIC_VTIC (5.0/EEPIC_UNIT)
#define EEPIC_VCHAR (10.0/EEPIC_UNIT)
#define EEPIC_HCHAR (EEPIC_VCHAR/2.0)
#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY
#ifdef TERM_BODY

static unsigned int EEPIC_posx;
static unsigned int EEPIC_posy;
static enum JUSTIFY eepic_justify = LEFT;
static int eepic_angle = 0;
static int eepic_color_on = FALSE;		/* use \color */
static int eepic_true_rotate = FALSE;		/* use \rotatebox */
static int fontsize_set = FALSE;

/* for DOTS point style */
#define EEPIC_TINY_DOT "\\rule{.1pt}{.1pt}"

/* POINTS */
static int eepic_num_point_types[] = { 12, 10, 8 };
static int eepic_pointsize = 0;
static char GPFAR *GPFAR EEPIC_points[][12] =
{
	{
		"\\makebox(0,0){$\\Diamond$}",
		"\\makebox(0,0){$+$}",
		"\\makebox(0,0){$\\Box$}",
		"\\makebox(0,0){$\\times$}",
		"\\makebox(0,0){$\\triangle$}",
		"\\makebox(0,0){$\\star$}",
		"\\circle{12}", "\\circle{18}", "\\circle{24}",
		"\\circle*{12}", "\\circle*{18}", "\\circle*{24}"
	},
	{
		"\\makebox(0,0){$\\scriptstyle\\Diamond$}",
		"\\makebox(0,0){$\\scriptstyle +$}",
		"\\makebox(0,0){$\\scriptstyle\\Box$}",
		"\\makebox(0,0){$\\scriptstyle\\times$}",
		"\\makebox(0,0){$\\scriptstyle\\triangle$}",
		"\\makebox(0,0){$\\scriptstyle\\star$}",
		"\\circle{12}", "\\circle{18}",
		"\\circle*{12}", "\\circle*{18}",
	},
	{
		"\\makebox(0,0){$\\scriptscriptstyle\\Diamond$}",
		"\\makebox(0,0){$\\scriptscriptstyle +$}",
		"\\makebox(0,0){$\\scriptscriptstyle\\Box$}",
		"\\makebox(0,0){$\\scriptscriptstyle\\times$}",
		"\\makebox(0,0){$\\scriptscriptstyle\\triangle$}",
		"\\makebox(0,0){$\\scriptscriptstyle\\star$}",
		"\\circle{12}",
		"\\circle*{12}",
	}
};

/* LINES */
static int eepic_numlines[] = { 5, 7, 8 };	/* number of linetypes below */
#define EEPIC_MAX_NUMLINES 8				/* max of eepic_numlines[] */
static int eepic_lineset = 0;
static char GPFAR *GPFAR EEPIC_lines[][EEPIC_MAX_NUMLINES] =
{
	{
		"\\thicklines \\path",	/* -2 border */
		"\\thinlines \\drawline[-50]",	/* -1 axes */
		"\\thinlines \\path",	/*  0 solid thin  */
		"\\thicklines \\path",	/*  1 solid thick */
		"\\Thicklines \\path"	/*  2 solid Thick */
	},
	{
		"\\thicklines \\path",	/* -2 border */
		"\\thinlines \\drawline[-50]",	/* -1 axes */
		"\\thinlines \\path",	/*  0 solid thin  */
		"\\thinlines \\dashline[90]{10}",
		"\\thinlines \\dottedline{10}",
		"\\thinlines \\dashline[60]{20}",
		"\\thinlines \\dottedline{20}"
	},
	{
		"\\thicklines \\path",	/* -2 border */
		"\\thinlines \\drawline[-50]",	/* -1 axes */
		"\\thinlines \\path",
		"\\thinlines \\path",
		"\\thinlines \\path",
		"\\thinlines \\path",
		"\\thinlines \\path",
		"\\thinlines \\path"
	}
};
static int EEPIC_type;		/* current line type */
static TBOOLEAN EEPIC_inline = FALSE;	/* are we in the middle of a line */
static void EEPIC_endline __PROTO((void)); /* terminate any line in progress */
static int EEPIC_linecount = 0;	/* number of points in line so far */
#define EEPIC_LINEMAX 50	/* max value for linecount */

#define EEPIC_NUM_COLORS 7
static int eepic_color = 0;
static char GPFAR *GPFAR eepic_colors[EEPIC_NUM_COLORS] =
{
	"\\color{black}\n",	/* border and axes (must be black!) */
	"\\color{red}\n",
	"\\color{blue}\n",
	"\\color{green}\n",
	"\\color{magenta}\n",
	"\\color{cyan}\n",
	"\\color{yellow}\n"
};

/* ARROWS */
/* we use the same code as for LATEX */
/* figure out the best arrow */
void best_latex_arrow __PROTO((int sx, int sy, int ex, int ey, int who, TBOOLEAN head));

TERM_PUBLIC void
EEPIC_init()
{
    EEPIC_posx = EEPIC_posy = 0;
	EEPIC_type = 0;
	EEPIC_linecount = 0;
	EEPIC_inline = FALSE;
	eepic_color = 0;
    fprintf(gpoutfile, "\
%% GNUPLOT: LaTeX picture using EEPIC macros\n\
\\setlength{\\unitlength}{%fpt}\n",
	    EEPIC_UNIT);
}


TERM_PUBLIC void
EEPIC_graphics()
{
    register struct termentry *t = term;

    /* HBB 20001027: respect 'size' and 'offset' settings to modify
     * picture box size and position */
    fprintf(gpoutfile, "\\begin{picture}(%d,%d)(%d,%d)\n",
	    (int) (t->xmax * xsize),
	    (int) (t->ymax * ysize),
	    (int) (t->xmax * xoffset),
	    (int) (t->ymax * xoffset));
    if ( fontsize_set )
    {
	float x = t->v_char * EEPIC_UNIT + 0.5;
	fprintf(gpoutfile,"\\fontsize{%d}{%g}\\selectfont\n", 
		(int) x,  1.2 * x );
    }
    else
	fprintf(gpoutfile,"\\footnotesize\n" );

}


TERM_PUBLIC void
EEPIC_text()
{
    EEPIC_endline();
    fputs("\\end{picture}\n", gpoutfile);
}


TERM_PUBLIC void
EEPIC_linetype(linetype)
    int linetype;
{
    EEPIC_endline();

    EEPIC_type = linetype % (eepic_numlines[eepic_lineset] - 2);

	if ( eepic_color_on )
	{
		eepic_color = linetype;
		if ( eepic_color < 0 )
			eepic_color = 0;
		else
		{
			eepic_color %= EEPIC_NUM_COLORS - 1;
			eepic_color += 1;
		}
		fputs( eepic_colors[eepic_color], gpoutfile );
	}
}



TERM_PUBLIC void
EEPIC_move(x, y)
    unsigned int x, y;
{
    EEPIC_endline();

    EEPIC_posx = x;
    EEPIC_posy = y;
}


TERM_PUBLIC void
EEPIC_point(x, y, number)	/* version of line_and_point */
    unsigned int x, y;
    int number;			/* type of point */
{
    EEPIC_move(x, y);

    /* Print the character defined by 'number'; number < 0 means 
       to use a dot, otherwise one of the defined points. */
    fprintf(gpoutfile, "\\put(%d,%d){%s}\n", x, y,
	    (number < 0 ? EEPIC_TINY_DOT
	     : EEPIC_points[eepic_pointsize][number % eepic_num_point_types[eepic_pointsize]]));
}


TERM_PUBLIC void
EEPIC_vector(ux, uy)
unsigned int ux, uy;
{
	if (!EEPIC_inline) {
		EEPIC_inline = TRUE;

		/* Start a new line. This depends on line type */
		fprintf(gpoutfile, "%s(%u,%u)",
				EEPIC_lines[eepic_lineset][EEPIC_type + 2],
				EEPIC_posx, EEPIC_posy);
		EEPIC_linecount = 1;
	} else {
		/* Even though we are in middle of a path, 
		 * we may want to start a new path command. 
		 * If they are too long then latex will choke.
		 */
		if (EEPIC_linecount++ >= EEPIC_LINEMAX) {
			fprintf(gpoutfile, "\n%s(%u,%u)",
					EEPIC_lines[eepic_lineset][EEPIC_type + 2],
					EEPIC_posx, EEPIC_posy);
			EEPIC_linecount = 1;
		}
	}
    fprintf(gpoutfile, "(%u,%u)", ux, uy);
    EEPIC_posx = ux;
    EEPIC_posy = uy;
}

static void
EEPIC_endline()
{
    if (EEPIC_inline) {
	putc('\n', gpoutfile);
	EEPIC_inline = FALSE;
    }
}


TERM_PUBLIC void
EEPIC_arrow(sx, sy, ex, ey, head)
unsigned int sx, sy, ex, ey;
TBOOLEAN head;
{
    best_latex_arrow(sx, sy, ex, ey, 2, head);	/* call latex routine */

    EEPIC_posx = ex;
    EEPIC_posy = ey;
}


TERM_PUBLIC void
EEPIC_put_text(x, y, str)
    unsigned int x, y;		/* reference point of string */
    char str[];			/* the text */
{
    int i, l;

    EEPIC_endline();

    fprintf(gpoutfile, "\\put(%d,%d)", x, y);
    if ((str[0] == '{') || (str[0] == '[')) {
	fprintf(gpoutfile, "{\\makebox(0,0)%s}\n", str);
    }
    else
    switch (eepic_angle)
    {
	case 0:
	{
	   switch (eepic_justify) {
	       case LEFT:
		   fputs("{\\makebox(0,0)[l]{",gpoutfile);
		   break;
	       case CENTRE:
		   fputs("{\\makebox(0,0){",gpoutfile);
		   break;
	       case RIGHT:
		   fputs("{\\makebox(0,0)[r]{",gpoutfile);
		   break;
	   }
	   fprintf(gpoutfile,"%s}}\n", str);
	   break;
	}
	case 1:
	{
	   if ( eepic_true_rotate )
	   {
	       /* use \rotatebox */
	       switch (eepic_justify) {
		   case LEFT:
		       fputs("{\\makebox(0,0)[lb]{\\rotatebox[origin=c]{90}{",
			     gpoutfile);
		       break;
		   case CENTRE:
		       fputs("{\\makebox(0,0)[l]{\\rotatebox[origin=c]{90}{",
			     gpoutfile);
		       break;
		   case RIGHT:
		       fputs("{\\makebox(0,0)[lt]{\\rotatebox[origin=c]{90}{",
			     gpoutfile);
		       break;
	       }
	       fprintf(gpoutfile,"%s}}}\n", str);
	   }
	   else
	   {
	       /* put text in a short stack */
	       switch (eepic_justify) {
		   case LEFT:
		       fputs("{\\makebox(0,0)[lb]{\\shortstack{",gpoutfile);
		       break;
		   case CENTRE:
		       fputs("{\\makebox(0,0)[l]{\\shortstack{",gpoutfile);
		       break;
		   case RIGHT:
		       fputs("{\\makebox(0,0)[lt]{\\shortstack{",gpoutfile);
		       break;
	       }
	       l = strlen(str)-1;
	       for ( i = 0; i < l; i ++ )
		   fprintf(gpoutfile, "%c\\\\", str[i] );
	       fputc(str[l],gpoutfile);
	       fputs("}}}\n",gpoutfile);
	   }
	   break;
       }
    }
}



TERM_PUBLIC int
EEPIC_justify_text(mode)
enum JUSTIFY mode;
{
    eepic_justify = mode;
    return (TRUE);
}

TERM_PUBLIC int
EEPIC_text_angle(ang)
int ang;
{
    eepic_angle = ang;
    return (TRUE);
}

TERM_PUBLIC void
EEPIC_reset()
{
    EEPIC_endline();
    EEPIC_posx = EEPIC_posy = 0;
}

TERM_PUBLIC void 
EEPIC_options()
{
    float fontsize = 0;

    eepic_color_on =
    eepic_true_rotate = FALSE;
    eepic_lineset = 0;
    eepic_pointsize = 0;

    while (!END_OF_COMMAND)
    {
	if (almost_equals(c_token, "de$fault"))
	{
	    fontsize_set = FALSE;
	    eepic_color_on =
	    eepic_true_rotate = FALSE;
	    eepic_lineset = 0;
	    eepic_pointsize = 0;
	    c_token++;
	}
	else
	if (almost_equals(c_token, "c$olor") ||
	    almost_equals(c_token, "c$olour"))
	{
	    eepic_color_on = TRUE;
	    eepic_lineset = 2;
	    c_token++;
	}
	else
	if (almost_equals(c_token, "r$otate"))
	{
	    eepic_true_rotate = TRUE;
	    c_token++;
	}
	else
	if (almost_equals(c_token, "da$shed"))
	{
	    if ( ! eepic_color_on )
		eepic_lineset = 1;	/* ignore when color is on */
	    c_token++;
	}
	else
	if (almost_equals(c_token, "s$mall"))
	{
	    eepic_pointsize = 1;
	    c_token++;
	}
	else
	if (almost_equals(c_token, "t$iny"))
	{
	    eepic_pointsize = 2;
	    c_token++;
	}
	if ( isdigit((unsigned char)
		     input_line[token[c_token].start_index]) )
	{
	    /* stolen from pslatex.trm */
	    struct value a;
	    fontsize = real(const_express(&a));
	    if ( fontsize < 1 || fontsize > 100 )
	    {
		int_error("font size out of bounds [1..100]", c_token);
		fontsize_set = FALSE;
	    }
	    else
	    {
		fontsize_set = TRUE;
		term->v_char = (unsigned int)(fontsize/EEPIC_UNIT);
		term->h_char = (unsigned int)((fontsize/EEPIC_UNIT)/2);
	    }
	    c_token++;
	}
    }

    sprintf(term_options, "default%s%s%s%s",
	    eepic_color_on ? " color" : "",
	    eepic_lineset == 1 ? " dashed" : "",
	    eepic_true_rotate ? " rotate" : "",
	    eepic_pointsize == 1 ?
	    " small" :
	    eepic_pointsize == 2 ?
	    " tiny" : "" );
    if ( fontsize_set )
	sprintf( term_options+strlen(term_options), " %d", (int) fontsize );
}

#endif

#ifdef TERM_TABLE

TERM_TABLE_START(eepic_driver)
    "eepic", "EEPIC -- extended LaTeX picture environment",
    EEPIC_XMAX, EEPIC_YMAX, EEPIC_VCHAR, EEPIC_HCHAR,
    EEPIC_VTIC, EEPIC_HTIC, EEPIC_options, EEPIC_init, EEPIC_reset,
    EEPIC_text, null_scale, EEPIC_graphics, EEPIC_move, EEPIC_vector,
    EEPIC_linetype, EEPIC_put_text, EEPIC_text_angle,
    EEPIC_justify_text, EEPIC_point, EEPIC_arrow, set_font_null
TERM_TABLE_END(eepic_driver)

#undef LAST_TERM
#define LAST_TERM eepic_driver

#endif
#endif

#ifdef TERM_HELP
START_HELP(eepic)
"1 eepic",
"?commands set terminal eepic",
"?set terminal eepic",
"?set term eepic",
"?terminal eepic",
"?term eepic",
"?eepic",
" The `eepic` terminal driver supports the extended LaTeX picture environment.",
" It is an alternative to the `latex` driver.",
"",
" The output of this terminal is intended for use with the \"eepic.sty\" macro",
" package for LaTeX.  To use it, you need \"eepic.sty\", \"epic.sty\" and a",
" printer driver that supports the \"tpic\" \\specials.  If your printer driver",
" doesn't support those \\specials, \"eepicemu.sty\" will enable you to use some",
" of them.",
" dvips and dvipdfm do support the \"tpic\" \\specials.",
"",
" Syntax:",
"    set terminal eepic {color, dashed, rotate, small, tiny, default, <fontsize>}",
"",
" Options:",
" You can give options in any order you wish.",
" 'color' causes gnuplot to produce \\color{...} commands so that the graphs are",
" colored. Using this option, you must include \\usepackage{color} in the preambel",
" of your latex document.",
" 'dashed' will allow dashed line types; without this option, only solid lines",
" with varying thickness will be used.",
" 'dashed' and 'color' are mutually exclusive; if 'color' is specified, then 'dashed'",
" will be ignored",
" 'rotate' will enable true rotated text (by 90 degrees). Otherwise, rotated text",
" will be typeset with letters stacked above each other. If you use this option",
" you must include \\usepackage{graphicx} in the preamble.",
" 'small' will use \\scriptsize symbols as point markers (Probably does not work",
" with TeX, only LaTeX2e). Default is to use the default math size.",
" 'tiny' uses \\scriptscriptstyle symbols.",
" 'default' resets all options to their defaults = no color, no dashed lines,",
" pseudo-rotated (stacked) text, large point symbols.",
" <fontsize> is a number which specifies the font size inside the picture",
" environment; the unit is pt (points), i.e., 10 pt equals approx. 3.5 mm.",
" If fontsize is not specified, then all text inside the picture will be set",
" in \\footnotesize.",
"",
" Notes:",
" Remember to escape the # character (or other chars meaningful to (La-)TeX)",
" by \\\\ (2 backslashes).",
" It seems that dashed lines become solid lines when the vertices of a plot",
" are too close. (I do not know if that is a general problem with the tpic specials,",
" or if it is caused by a bug in eepic.sty or dvips/dvipdfm.)",
" The default size of an eepic plot is 5x3 inches, which can be scaled ",
" by 'set size a,b'",
" Points, among other things, are drawn using the LaTeX commands \"\\Diamond\",",
" \"\\Box\", etc.  These commands no longer belong to the LaTeX2e core; they are",
" included in the latexsym package, which is part of the base distribution and",
" thus part of any LaTeX implementation. Please do not forget to use this package.",
" Instead of latexsym, you can also include the amssymb package."
" All drivers for LaTeX offer a special way of controlling text positioning:",
" If any text string begins with '{', you also need to include a '}' at the",
" end of the text, and the whole text will be centered both horizontally and",
" vertically.  If the text string begins with '[', you need to follow this with",
" a position specification (up to two out of t,b,l,r), ']{', the text itself,",
" and finally '}'.  The text itself may be anything LaTeX can typeset as an",
" LR-box.  '\\rule{}{}'s may help for best positioning.",
"",
" Examples:",
" set term eepic",
"   output graphs as eepic macros inside a picture environment;",
"   \\input the resulting file in your LaTeX document.",
" set term eepic color tiny rotate 8",
"   eepic macros with \\color macros, \\scripscriptsize point markers,",
"   true rotated text, and all text set with 8pt.",
"",
" About label positioning:",
" Use gnuplot defaults (mostly sensible, but sometimes not really best):",
"        set title '\\LaTeX\\ -- $ \\gamma $'",
" Force centering both horizontally and vertically:",
"        set label '{\\LaTeX\\ -- $ \\gamma $}' at 0,0",
" Specify own positioning (top here):",
"        set xlabel '[t]{\\LaTeX\\ -- $ \\gamma $}'",
" The other label -- account for long ticlabels:",
"        set ylabel '[r]{\\LaTeX\\ -- $ \\gamma $\\rule{7mm}{0pt}'"
END_HELP(eepic)
#endif /* TERM_HELP */