ref: 9eaba52cafcac7c2f3bfc72d7be1f15893196be1
dir: /DoConfig/fltk/src/fl_set_fonts_x.cxx/
//
// "$Id$"
//
// X11 font utilities for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// This function fills in the fltk font table with all the fonts that
// are found on the X server. It tries to place the fonts into families
// and to sort them so the first 4 in a family are normal, bold, italic,
// and bold italic.
// Standard X fonts are matched by a pattern that is always of
// this form, and this pattern is put in the table:
// "-*-family-weight-slant-width1-style-*-registry-encoding"
// Non-standard font names (those not starting with '-') are matched
// by a pattern of the form "prefix*suffix", where the '*' is where
// fltk thinks the point size is, or by the actual font name if no
// point size is found.
// Fltk knows how to pull an "attribute" out of a font name, such as
// bold or italic, by matching known x font field values. All words
// that don't match a known attribute are combined into the "name"
// of the font. Names are compared before attributes for sorting, this
// makes the bold and plain version of a font come out next to each
// other despite the poor X font naming scheme.
// By default fl_set_fonts() only does iso8859-1 encoded fonts. You can
// do all normal X fonts by passing "-*" or every possible font with "*".
// Fl::set_font will take strings other than the ones this stores
// and can identify any font on X that way. You may want to write your
// own system of font management and not use this code.
// turn word N of a X font name into either some attribute bits
// (right now 0, FL_BOLD, or FL_ITALIC), or into -1 indicating that
// the word should be put into the name:
static int attribute(int n, const char *p) {
// don't put blank things into name:
if (!*p || *p=='-' || *p=='*') return 0;
if (n == 3) { // weight
if (!strncmp(p,"normal",6) ||
!strncmp(p,"light",5) ||
!strncmp(p,"medium",6) ||
!strncmp(p,"book",4)) return 0;
if (!strncmp(p,"bold",4) || !strncmp(p,"demi",4)) return FL_BOLD;
} else if (n == 4) { // slant
if (*p == 'r') return 0;
if (*p == 'i' || *p == 'o') return FL_ITALIC;
} else if (n == 5) { // sWidth
if (!strncmp(p,"normal",6)) return 0;
}
return -1;
}
// return non-zero if the registry-encoding should be used:
extern const char* fl_encoding;
static int use_registry(const char *p) {
return *p && *p!='*' && strcmp(p,fl_encoding);
}
// Bug: older versions calculated the value for *ap as a side effect of
// making the name, and then forgot about it. To avoid having to change
// the header files I decided to store this value in the last character
// of the font name array.
#define ENDOFBUFFER 127 // sizeof(Fl_Font.fontname)-1
// turn a stored (with *'s) X font name into a pretty name:
const char* Fl::get_font_name(Fl_Font fnum, int* ap) {
Fl_Fontdesc *f = fl_fonts + fnum;
if (!f->fontname[0]) {
int type = 0;
const char* p = f->name;
if (!p) {
if (ap) *ap = 0;
return "";
}
char *o = f->fontname;
if (*p != '-') { // non-standard font, just replace * with spaces:
if (strstr(p,"bold")) type = FL_BOLD;
if (strstr(p,"ital")) type |= FL_ITALIC;
for (;*p; p++) {
if (*p == '*' || *p == ' ' || *p == '-') {
do p++; while (*p == '*' || *p == ' ' || *p == '-');
if (!*p) break;
if (o < (f->fontname + ENDOFBUFFER - 1)) *o++ = ' ';
}
if (o < (f->fontname + ENDOFBUFFER - 1)) *o++ = *p;
}
*o = 0;
} else { // standard dash-separated font:
// get the family:
const char *x = fl_font_word(p,2); if (*x) x++; if (*x=='*') x++;
if (!*x) {
if (ap) *ap = 0;
return p;
}
const char *e = fl_font_word(x,1);
if ((e - x) < (int)(ENDOFBUFFER - 1)) {
// MRS: we want strncpy here, not strlcpy...
strncpy(o,x,e-x);
o += e-x;
} else {
strlcpy(f->fontname, x, ENDOFBUFFER);
o = f->fontname+ENDOFBUFFER-1;
}
// collect all the attribute words:
for (int n = 3; n <= 6; n++) {
// get the next word:
if (*e) e++; x = e; e = fl_font_word(x,1);
int t = attribute(n,x);
if (t < 0) {
if (o < (f->fontname + ENDOFBUFFER - 1)) *o++ = ' ';
if ((e - x) < (int)(ENDOFBUFFER - (o - f->fontname) - 1)) {
// MRS: we want strncpy here, not strlcpy...
strncpy(o,x,e-x);
o += e-x;
} else {
strlcpy(o,x, ENDOFBUFFER - (o - f->fontname) - 1);
o = f->fontname+ENDOFBUFFER-1;
}
} else type |= t;
}
// skip over the '*' for the size and get the registry-encoding:
x = fl_font_word(e,2);
if (*x) {x++; *o++ = '('; while (*x) *o++ = *x++; *o++ = ')';}
*o = 0;
if (type & FL_BOLD) strlcat(f->fontname, " bold", ENDOFBUFFER);
if (type & FL_ITALIC) strlcat(f->fontname, " italic", ENDOFBUFFER);
}
f->fontname[ENDOFBUFFER] = (char)type;
}
if (ap) *ap = f->fontname[ENDOFBUFFER];
return f->fontname;
}
extern "C" {
// sort raw (non-'*') X font names into perfect order:
static int ultrasort(const void *aa, const void *bb) {
const char *a = *(char **)aa;
const char *b = *(char **)bb;
// sort all non x-fonts at the end:
if (*a != '-') {
if (*b == '-') return 1;
// 2 non-x fonts are matched by "numeric sort"
int ret = 0;
for (;;) {
if (isdigit(*a) && isdigit(*b)) {
int na = strtol(a, (char **)&a, 10);
int nb = strtol(b, (char **)&b, 10);
if (!ret) ret = na-nb;
} else if (*a != *b) {
return (*a-*b);
} else if (!*a) {
return ret;
} else {
a++; b++;
}
}
} else {
if (*b != '-') return -1;
}
// skip the foundry (assume equal):
for (a++; *a && *a++!='-';);
for (b++; *b && *b++!='-';);
// compare the family and all the attribute words:
int atype = 0;
int btype = 0;
for (int n = 2; n <= 6; n++) {
int at = attribute(n,a);
int bt = attribute(n,b);
if (at < 0) {
if (bt >= 0) return 1;
for (;;) {if (*a!=*b) return *a-*b; b++; if (!*a || *a++=='-') break;}
} else {
if (bt < 0) return -1;
a = fl_font_word(a,1); if (*a) a++;
b = fl_font_word(b,1); if (*b) b++;
atype |= at; btype |= bt;
}
}
// remember the pixel size:
int asize = atoi(a);
int bsize = atoi(b);
// compare the registry/encoding:
a = fl_font_word(a,6); if (*a) a++;
b = fl_font_word(b,6); if (*b) b++;
if (use_registry(a)) {
if (!use_registry(b)) return 1;
int r = strcmp(a,b); if (r) return r;
} else {
if (use_registry(b)) return -1;
}
if (atype != btype) return atype-btype;
if (asize != bsize) return asize-bsize;
// something wrong, just do a string compare...
return strcmp(*(char**)aa, *(char**)bb);
}
}
// converts a X font name to a standard starname, returns point size:
static int to_canonical(char *to, const char *from, size_t tolen) {
char* c = fl_find_fontsize((char*)from);
if (!c) return -1; // no point size found...
const char* endptr;
int size = strtol(c,(char**)&endptr,10);
if (from[0] == '-') {
// replace the "foundry" with -*-:
*to++ = '-'; *to++ = '*';
for (from++; *from && *from != '-'; from++);
// skip to the registry-encoding:
endptr = (char*)fl_font_word(endptr,6);
if (*endptr && !use_registry(endptr+1)) endptr = "";
}
int n = c-from;
// MRS: we want strncpy here, not strlcpy...
if (n > (int)(tolen - 1)) return -1;
strncpy(to,from,n);
to[n++] = '*';
strlcpy(to+n,endptr, tolen - n);
return size;
}
static unsigned int fl_free_font = FL_FREE_FONT;
Fl_Font Fl::set_fonts(const char* xstarname) {
if (fl_free_font > (unsigned)FL_FREE_FONT) // already been here
return (Fl_Font)fl_free_font;
fl_open_display();
int xlistsize;
char buf[20];
if (!xstarname) {
strcpy(buf,"-*-"); strcpy(buf+3,fl_encoding);
xstarname = buf;
}
char **xlist = XListFonts(fl_display, xstarname, 10000, &xlistsize);
if (!xlist) return (Fl_Font)fl_free_font;
qsort(xlist, xlistsize, sizeof(*xlist), ultrasort);
int used_xlist = 0;
for (int i=0; i<xlistsize;) {
int first_xlist = i;
const char *p = xlist[i++];
char canon[1024];
int size = to_canonical(canon, p, sizeof(canon));
if (size >= 0) {
for (;;) { // find all matching fonts:
if (i >= xlistsize) break;
const char *q = xlist[i];
char this_canon[1024];
if (to_canonical(this_canon, q, sizeof(this_canon)) < 0) break;
if (strcmp(canon, this_canon)) break;
i++;
}
/*if (*p=='-' || i > first_xlist+1)*/ p = canon;
}
unsigned int j;
for (j = 0;; j++) {
/*if (j < FL_FREE_FONT) {
// see if it is one of our built-in fonts:
// if so, set the list of x fonts, since we have it anyway
if (fl_fonts[j].name && !strcmp(fl_fonts[j].name, p)) break;
} else */{
j = fl_free_font++;
if (p == canon) p = strdup(p); else used_xlist = 1;
Fl::set_font((Fl_Font)j, p);
break;
}
}
if (!fl_fonts[j].xlist) {
fl_fonts[j].xlist = xlist+first_xlist;
fl_fonts[j].n = -(i-first_xlist);
used_xlist = 1;
}
}
if (!used_xlist) XFreeFontNames(xlist);
return (Fl_Font)fl_free_font;
}
int Fl::get_font_sizes(Fl_Font fnum, int*& sizep) {
Fl_Fontdesc *s = fl_fonts+fnum;
if (!s->name) s = fl_fonts; // empty slot in table, use entry 0
if (!s->xlist) {
fl_open_display();
s->xlist = XListFonts(fl_display, s->name, 100, &(s->n));
if (!s->xlist) return 0;
}
int listsize = s->n; if (listsize<0) listsize = -listsize;
static int sizes[128];
int numsizes = 0;
for (int i = 0; i < listsize; i++) {
char *q = s->xlist[i];
char *d = fl_find_fontsize(q);
if (!d) continue;
int s = strtol(d,0,10);
if (!numsizes || sizes[numsizes-1] < s) {
sizes[numsizes++] = s;
} else {
// insert-sort the new size into list:
int n;
for (n = numsizes-1; n > 0; n--) if (sizes[n-1] < s) break;
if (sizes[n] != s) {
for (int m = numsizes; m > n; m--) sizes[m] = sizes[m-1];
sizes[n] = s;
numsizes++;
}
}
}
sizep = sizes;
return numsizes;
}
//
// End of "$Id$".
//