/*
© 2000 Compaq Computer Corporation

COMPAQ Registered in U.S. Patent and Trademark Office.

Confidential computer software.  Valid license from Compaq required for
possession, use or copying.  Consistent with FAR 12.211 and 12.212, Commercial
Computer Software, Computer Software Documentation, and Technical Data for
Commercial Items are licensed to the U.S. Government under vendor's standard
commercial license.
*/
/*
 * $XConsortium: xlsfonts.c,v 1.32 91/06/24 11:09:12 gildea Exp $
 *
 * Copyright 1989 Massachusetts Institute of Technology
 *
 * 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 M.I.T. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission.  M.I.T. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
 * 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.
 */

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <stdio.h>
#include "dsimple.h"

#define N_START 1000  /* Maximum # of fonts to start with */

int max_output_line_width = 79;
int output_line_padding = 3;
int columns = 0;

#define L_SHORT 0
#define L_MEDIUM 1
#define L_LONG 2
#define L_VERYLONG 3

Bool	sort_output = True;
Bool	open_instead_of_list = False;
int	long_list = L_SHORT;
int	nnames = N_START;
int	font_cnt;
int	min_max;
typedef struct {
	char		*name;
	XFontStruct	*info;
} FontList;
FontList	*font_list;


usage()
{
	fprintf (stderr,"usage:  %s [-options] [-fn pattern]\n", program_name);
	fprintf (stderr, "where options include:\n");
	fprintf (stderr,
	"    -l[l[l]]                 give long info about each font\n");
	fprintf (stderr,
	"    -m                       give character min and max bounds\n");
	fprintf (stderr,
	"    -C                       force columns\n");
	fprintf (stderr,
	"    -1                       force single column\n");
	fprintf (stderr,
	"    -u                       keep output unsorted\n");
	fprintf (stderr,
	"    -o                       use OpenFont/QueryFont instead of ListFonts\n");
	fprintf (stderr,
	"    -w width                 maximum width for multiple columns\n");
	fprintf (stderr,
	"    -n columns               number of columns if multi column\n");
	fprintf (stderr,
	"    -display displayname     X server to contact\n");
	fprintf (stderr,
	    "\n");
	exit(1);
}

main(argc, argv)
int argc;
char **argv;    
{
	int	argcnt = 0, i;

	INIT_NAME;

	/* Handle command line arguments, open display */
	Setup_Display_And_Screen(&argc, argv);
	for (argv++, argc--; argc; argv++, argc--) {
		if (argv[0][0] == '-') {
			if (argcnt > 0) usage ();
			for (i=1; argv[0][i]; i++)
				switch(argv[0][i]) {
				case 'l':
					long_list++;
					break;
				case 'm':
					min_max++;
					break;
				case 'C':
					columns = 0;
					break;
				case '1':
					columns = 1;
					break;
				case 'f':
					if (--argc <= 0) usage ();
					argcnt++;
					argv++;
					get_list(argv[0]);
					goto next;
				case 'w':
					if (--argc <= 0) usage ();
					argv++;
					max_output_line_width = atoi(argv[0]);
					goto next;
				case 'n':
					if (--argc <= 0) usage ();
					argv++;
					columns = atoi(argv[0]);
					goto next;
				case 'o':
					open_instead_of_list = True;
					break;
				case 'u':
					sort_output = False;
					break;
				default:
					usage();
					break;
				}
			if (i == 1)
				usage();
		} else {
			argcnt++;
			get_list(argv[0]);
		}
	  next: ;
	}
	if (argcnt == 0)
		get_list("*");
	show_fonts();
	exit(0);
}

get_list(pattern)
	char	*pattern;
{
	int	available = nnames+1,
		i;
	char	**fonts;
	XFontStruct	*info;

	/* Get list of fonts matching pattern */
	for (;;) {
		if (open_instead_of_list) {
		    info = XLoadQueryFont (dpy, pattern);

		    if (info) {
			fonts = &pattern;
			available = 1;
			XUnloadFont (dpy, info->fid);
		    } else {
			fonts = NULL;
		    }
		    break;
		}
		    
		if (long_list == L_MEDIUM)
			fonts = XListFontsWithInfo(dpy,
				pattern, nnames, &available, &info);
		else
			fonts = XListFonts(dpy, pattern, nnames, &available);
		if (fonts == NULL || available < nnames)
			break;
		if (long_list == L_MEDIUM)
			XFreeFontInfo(fonts, info, available);
		else
			XFreeFontNames(fonts);
		nnames = available * 2;
	}

	if (fonts == NULL) {
		fprintf(stderr, "%s: pattern \"%s\" unmatched\n",
			program_name, pattern);
		return;
	}

	font_list = (FontList *)Realloc((char *)font_list,
		(font_cnt + available) * sizeof(FontList));
	for (i=0; i<available; i++) {
		font_list[font_cnt].name = fonts[i];
		if (long_list == L_MEDIUM)
			font_list[font_cnt].info = info + i;
		else
			font_list[font_cnt].info = NULL;
		font_cnt++;
	}
}

compare(f1, f2)
	FontList	*f1, *f2;
{
	char	*p1 = f1->name,
		*p2 = f2->name;

	while (*p1 && *p2 && *p1 == *p2)
		p1++, p2++;
	return(*p1 - *p2);
}

show_fonts()
{
	int	i;

	if (font_cnt == 0)
		return;

	/* first sort the output */
	if (sort_output) qsort(font_list, font_cnt, sizeof(FontList), compare);

	if (long_list > L_MEDIUM) {
	    for (i = 0; i < font_cnt; i++) {
		do_query_font (dpy, font_list[i].name);
	    }
	    return;
	}

	if (long_list == L_MEDIUM) {
		XFontStruct	*pfi;
		char		*string;

		printf("DIR  ");
		printf("MIN  ");
		printf("MAX ");
		printf("EXIST ");
		printf("DFLT ");
		printf("PROP ");
		printf("ASC ");
		printf("DESC ");
		printf("NAME");
		printf("\n");
		for (i=0; i<font_cnt; i++) {
			pfi = font_list[i].info;
			if (!pfi) {
			    fprintf (stderr, 
		    	     "%s:  no font information for font \"%s\".\n",
				     program_name, 
				     font_list[i].name ? 
				     font_list[i].name : "");
			    continue;
			}
			switch(pfi->direction) {
			case FontLeftToRight: string = "-->"; break;
			case FontRightToLeft: string = "<--"; break;
			default:	      string = "???"; break;
			}
			printf("%-4s", string);
			if (pfi->min_byte1 == 0
			 && pfi->max_byte1 == 0) {
				printf(" %3d ", pfi->min_char_or_byte2);
				printf(" %3d ", pfi->max_char_or_byte2);
			} else {
				printf("*%3d ", pfi->min_byte1);
				printf("*%3d ", pfi->max_byte1);
			}
			printf("%5s ", pfi->all_chars_exist ? "all" : "some");
			printf("%4d ", pfi->default_char);
			printf("%4d ", pfi->n_properties);
			printf("%3d ", pfi->ascent);
			printf("%4d ", pfi->descent);
			printf("%s\n", font_list[i].name);
			if (min_max) {
				char	min[ BUFSIZ ],
					max[ BUFSIZ ];
				char	*pmax = max,
					*pmin = min;

				strcpy(pmin, "     min(l,r,w,a,d) = (");
				strcpy(pmax, "     max(l,r,w,a,d) = (");
				pmin += strlen(pmin);
				pmax += strlen(pmax);

				copy_number(&pmin, &pmax,
					pfi->min_bounds.lbearing,
					pfi->max_bounds.lbearing);
				*pmin++ = *pmax++ = ',';
				copy_number(&pmin, &pmax,
					pfi->min_bounds.rbearing,
					pfi->max_bounds.rbearing);
				*pmin++ = *pmax++ = ',';
				copy_number(&pmin, &pmax,
					pfi->min_bounds.width,
					pfi->max_bounds.width);
				*pmin++ = *pmax++ = ',';
				copy_number(&pmin, &pmax,
					pfi->min_bounds.ascent,
					pfi->max_bounds.ascent);
				*pmin++ = *pmax++ = ',';
				copy_number(&pmin, &pmax,
					pfi->min_bounds.descent,
					pfi->max_bounds.descent);
				*pmin++ = *pmax++ = ')';
				*pmin = *pmax = '\0';
				printf("%s\n", min);
				printf("%s\n", max);
			}
		}
		return;
	}

	if ((columns == 0 && isatty(1)) || columns > 1) {
		int	width,
			max_width = 0,
			lines_per_column,
			j,
			index;

		for (i=0; i<font_cnt; i++) {
			width = strlen(font_list[i].name);
			if (width > max_width)
				max_width = width;
		}
		if (max_width == 0)
			Fatal_Error("all %d fontnames listed are zero length",
				    font_cnt);

		if (columns == 0) {
		    if ((max_width * 2) + output_line_padding >
			max_output_line_width) {
			columns = 1;
		    } else {
			max_width += output_line_padding;
			columns = ((max_output_line_width +
				    output_line_padding) / max_width);
		    }
		} else {
		    max_width += output_line_padding;
		}
		if (columns <= 1) goto single_column;

		if (font_cnt < columns)
			columns = font_cnt;
		lines_per_column = (font_cnt + columns - 1) / columns;

		for (i=0; i<lines_per_column; i++) {
			for (j=0; j<columns; j++) {
				index = j * lines_per_column + i;
				if (index >= font_cnt)
					break;
				if (j+1 == columns)
					printf("%s", font_list[ index ].name);
				else
					printf("%-*s",
						max_width, 
						font_list[ index ].name);
			}
			printf("\n");
		}
		return;
	}

      single_column:
	for (i=0; i<font_cnt; i++)
		printf("%s\n", font_list[i].name);
}

max(i, j)
	int	i, j;
{
	if (i > j)
		return (i);
	return(j);
}

copy_number(pp1, pp2, n1, n2)
	char	**pp1, **pp2;
	int	n1, n2;
{
	char	*p1 = *pp1;
	char	*p2 = *pp2;
	int	w;

	sprintf(p1, "%d", n1);
	sprintf(p2, "%d", n2);
	w = max(strlen(p1), strlen(p2));
	sprintf(p1, "%*d", w, n1);
	sprintf(p2, "%*d", w, n2);
	p1 += strlen(p1);
	p2 += strlen(p2);
	*pp1 = p1;
	*pp2 = p2;
}



/* ARGSUSED */
static int IgnoreError(disp, event)
    Display *disp;
    XErrorEvent *event;
{
    return 0;
}

static char *bounds_metrics_title =
                      "width left  right  asc  desc   attr   keysym\n";
static char *char_metrics_fmt = 
"\t0x%02x%02x (%u)\t%4d  %4d  %4d  %4d  %4d  0x%04x  %s\n";
static char *bounds_metrics_fmt =
"\t%3s\t\t%4d  %4d  %4d  %4d  %4d  0x%04x\n";


#define PrintBounds(_what,_ptr) \
{   register XCharStruct *p = (_ptr); \
    printf (bounds_metrics_fmt, _what, p->width, p->lbearing, \
	  p->rbearing, p->ascent, p->descent, p->attributes); }


static char* stringValued [] = { /* values are atoms */
    "FAMILY_NAME",
    "FOUNDRY",
    "STYLE",
    "MONOSPACED",
    "RELATIVE_WEIGHT",
    "RELATIVE_SET",
    "CLASSIFICATION",
    "CHARSET_REGISTRY",
    "CHARSET_ENCODING",
    "QUALITY",
    "CHARSET_COLLECTIONS",
    "FULL_NAME",
    "COPYRIGHT",
    "WEIGHT_NAME",
    "SETWIDTH_NAME",
    "SLANT",
    "SPACING",
    "ADD_STYLE_NAME",
    "FONTNAME_REGISTRY",
    "FONT",
    "DEVICE_FONT_NAME",
     NULL
    };

static void PrintProperty (prop)
    XFontProp *prop;
{
    char *atom, *value;
    char nosuch[40];
    int i;
    int (*oldhandler)() = XSetErrorHandler (IgnoreError);

    atom = XGetAtomName(dpy, prop->name);
    if (!atom) {
	atom = nosuch;
	nosuch[0] = '\0';
	(void)sprintf (atom, "No such atom = %d", prop->name);
    }
    printf ("      %s", atom);
    for (i = strlen(atom); i < 22; i++) printf (" ");
    for (i = 0; ; i++) {
	if (stringValued[i] == NULL) {
	    printf ("%d\n", prop->card32);
	    break;
	}
	if (strcmp(stringValued[i], atom) == 0) {
	    value = XGetAtomName(dpy, prop->card32);
	    if (value == NULL)
		printf ("%d (expected string value)\n", prop->card32);
	    else {
		printf ("%s\n", value);
		XFree (value);
	    }
	    break;
	}
    } 
    if (atom != nosuch) XFree (atom);
    XSetErrorHandler (oldhandler);
}


ComputeFontType (fs)
    XFontStruct *fs;
{
    int i;
    Bool char_cell = True;
    char *reason = NULL;
    XCharStruct *cs;
    Atom awatom = XInternAtom (dpy, "AVERAGE_WIDTH", False);

    printf ("  font type:\t\t");
    if (fs->min_bounds.width != fs->max_bounds.width) {
	printf ("Proportional (min and max widths not equal)\n");
	return;
    }

    if (awatom) {
	for (i = 0; i < fs->n_properties; i++) {
	    if (fs->properties[i].name == awatom &&
		(fs->max_bounds.width * 10) != fs->properties[i].card32) {
		char_cell = False;
		reason = "font width not equal to AVERAGE_WIDTH";
		break;
	    }
	}
    }

    if (fs->per_char) {
	for (i = fs->min_char_or_byte2, cs = fs->per_char;
	     i <= fs->max_char_or_byte2; i++, cs++) {
	    if (cs->width == 0) continue;
	    if (cs->width != fs->max_bounds.width) {
		/* this shouldn't happen since we checked above */
		printf ("Proportional (characters not all the same width)\n");
		return;
	    }
	    if (char_cell) {
		if (cs->width < 0) {
		    if (!(cs->width <= cs->lbearing &&
			  cs->lbearing <= cs->rbearing &&
			  cs->rbearing <= 0)) {
			char_cell = False;
			reason = "ink outside bounding box";
		    }
		} else {
		    if (!(0 <= cs->lbearing &&
			  cs->lbearing <= cs->rbearing &&
			  cs->rbearing <= cs->width)) {
			char_cell = False;
			reason = "ink outside bounding box";
		    }
		}
		if (!(cs->ascent <= fs->ascent &&
		      cs->descent <= fs->descent)) {
		    char_cell  = False;
		    reason = "characters not all same ascent or descent";
		}
	    }
	}
    }

    printf ("%s", char_cell ? "Character Cell" : "Monospaced");
    if (reason) printf (" (%s)", reason);
    printf ("\n");
	
    return;
}


print_character_metrics (info)
    register XFontStruct *info;
{
    register XCharStruct *pc = info->per_char;
    register int i, j;
    unsigned n, saven;

    printf ("  character metrics:\n");
    saven = ((info->min_byte1 << 8) | info->min_char_or_byte2);
    for (j = info->min_byte1; j <= info->max_byte1; j++) {
	n = saven;
	for (i = info->min_char_or_byte2; i <= info->max_char_or_byte2; i++) {
	    char *s = XKeysymToString ((KeySym) n);
	    printf (char_metrics_fmt, j, i, n, pc->width, pc->lbearing,
		    pc->rbearing, pc->ascent, pc->descent, pc->attributes,
		    s ? s : ".");
	    pc++;
	    n++;
	}
	saven += 256;
    }
}


do_query_font (dpy, name)
    Display *dpy;
    char *name;
{
    register int i;
    register XFontStruct *info = XLoadQueryFont (dpy, name);

    if (!info) {
	fprintf (stderr, "%s:  unable to get info about font \"%s\"\n",
		 program_name, name);
	return;
    }
    printf ("name:  %s\n", name ? name : "(nil)");
    printf ("  direction:\t\t%s\n", ((info->direction == FontLeftToRight)
				     ? "left to right" : "right to left"));
    printf ("  indexing:\t\t%s\n", 
	    ((info->min_byte1 == 0 && info->max_byte1 == 0) ? "linear" :
	     "matrix"));
    printf ("  rows:\t\t\t0x%02x thru 0x%02x (%d thru %d)\n",
	    info->min_byte1, info->max_byte1,
	    info->min_byte1, info->max_byte1);
    printf ("  columns:\t\t0x%02x thru 0x%02x (%d thru %d)\n",
	    info->min_char_or_byte2, info->max_char_or_byte2,
	    info->min_char_or_byte2, info->max_char_or_byte2);
    printf ("  all chars exist:\t%s\n",
	(info->all_chars_exist) ? "yes" : "no");
    printf ("  default char:\t\t0x%04x (%d)\n",
	    info->default_char, info->default_char);
    printf ("  ascent:\t\t%d\n", info->ascent);
    printf ("  descent:\t\t%d\n", info->descent);
    ComputeFontType (info);
    printf ("  bounds:\t\t%s", bounds_metrics_title);
    PrintBounds ("min", &info->min_bounds);
    PrintBounds ("max", &info->max_bounds);
    if (info->per_char && long_list >= L_VERYLONG) 
      print_character_metrics (info);
    printf ("  properties:\t\t%d\n", info->n_properties);
    for (i = 0; i < info->n_properties; i++)
	PrintProperty (&info->properties[i]);
    printf ("\n");

    XFreeFontInfo (NULL, info, 1);
}