/*
 * $Xorg: xlsfonts.c,v 1.4 2001/02/09 02:05:54 xorgcvs Exp $
 *
 * 
Copyright 1989, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

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
OPEN GROUP 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 Open Group 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 Open Group.
 * */
/* $XFree86: xc/programs/xlsfonts/xlsfonts.c,v 1.9 2003/09/08 14:25:33 eich Exp $ */

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xos.h>
#include <stdio.h>
#include <stdlib.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;


static void get_list(char *);
static void show_fonts(void);
static void copy_number(char **, char **, int, int);
static void do_query_font(Display *, char *);
static int compare(const void *, const void *);
#ifndef max
static int max(int, int);
#endif
static int IgnoreError(Display *, XErrorEvent *);
static void PrintProperty(XFontProp *);
static void ComputeFontType(XFontStruct *);
static void print_character_metrics(register XFontStruct *);


void
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);
}

int
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);
}

void
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++;
	}
}

static int
compare(arg1, arg2)
    const void *arg1;
    const void *arg2;
{
	const FontList *f1 = arg1;
	const FontList *f2 = arg2;
	const char *p1 = f1->name;
	const char *p2 = f2->name;

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

void
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);
}

#ifndef max
static int
max(i, j)
	int	i, j;
{
	if (i > j)
		return (i);
	return(j);
}
#endif

void
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 */
    /* font name components (see section 3.2 of the XLFD) */
    "FOUNDRY",
    "FAMILY_NAME",
    "WEIGHT_NAME",
    "SLANT",
    "SETWIDTH_NAME",
    "ADD_STYLE_NAME",
    "SPACING",
    "CHARSET_REGISTRY",
    "CHARSET_ENCODING",

    /* other standard X font properties (see section 3.2 of the XLFD) */
    "FONT",
    "FACE_NAME",
    "FULL_NAME",              /* deprecated */
    "COPYRIGHT",
    "NOTICE",
    "FONT_TYPE",
    "FONT_VERSION",
    "RASTERIZER_NAME",
    "RASTERIZER_VERSION",

    /* other registered font properties (see the X.org Registry, sec. 15) */
    "_ADOBE_POSTSCRIPT_FONTNAME",

    /* unregistered font properties */
    "CHARSET_COLLECTIONS",
    "CLASSIFICATION",
    "DEVICE_FONT_NAME",
    "FONTNAME_REGISTRY",
    "MONOSPACED",
    "QUALITY",
    "RELATIVE_SET",
    "STYLE",
     NULL
    };

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

    atom = XGetAtomName(dpy, prop->name);
    if (!atom) {
	atom = nosuch;
	nosuch[0] = '\0';
	(void)sprintf (atom, "No such atom = %ld", prop->name);
    }
    printf ("      %s", atom);

    /* Pad out to a column width of 22, but ensure there is always at
       least one space between property name & value. */
    for (i = strlen(atom); i < 21; i++) putchar (' ');
    putchar(' ');

    for (i = 0; ; i++) {
	if (stringValued[i] == NULL) {
	    printf ("%ld\n", prop->card32);
	    break;
	}
	if (strcmp(stringValued[i], atom) == 0) {
	    value = XGetAtomName(dpy, prop->card32);
	    if (value == NULL)
		printf ("%ld (expected string value)\n", prop->card32);
	    else {
		printf ("%s\n", value);
		XFree (value);
	    }
	    break;
	}
    } 
    if (atom != nosuch) XFree (atom);
    XSetErrorHandler (oldhandler);
}


static void
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;
}


static void
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;
    }
}


void
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);
}