/*
 * $XConsortium: xlsfonts.c,v 1.34 94/04/17 20:24:37 rws Exp $
 *
 * 
Copyright (c) 1989  X Consortium

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of the X Consortium shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the X Consortium.
 * */

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.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);
}