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eterm/src/font.c

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/* font.c -- Eterm font module
*
* This file is original work by Michael Jennings <mej@eterm.org> and
* Tuomo Venalainen <vendu@cc.hut.fi>. This file, and any other file
* bearing this same message or a similar one, is distributed under
* the GNU Public License (GPL) as outlined in the COPYING file.
*
* Copyright (C) 1997-1999, Michael Jennings and Tuomo Venalainen
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
static const char cvs_ident[] = "$Id$";
#include "config.h"
#include "feature.h"
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include "../libmej/debug.h"
#include "../libmej/mem.h"
#include "../libmej/strings.h"
#include "debug.h"
#include "command.h"
#include "font.h"
#include "startup.h"
#include "options.h"
#include "screen.h"
#include "term.h"
#include "windows.h"
unsigned char font_change_count = 0;
#ifdef MULTI_CHARSET
const char *def_mfontName[] = {MFONT0, MFONT1, MFONT2, MFONT3, MFONT4};
#endif
const char *def_fontName[] = {FONT0, FONT1, FONT2, FONT3, FONT4};
static etfont_t *font_cache = NULL, *cur_font = NULL;
static void font_cache_add(const char *name, unsigned char type, void *info);
static void font_cache_del(const void *info);
static etfont_t *font_cache_find(const char *name, unsigned char type);
static void *font_cache_find_info(const char *name, unsigned char type);
static void
font_cache_add(const char *name, unsigned char type, void *info) {
etfont_t *font;
D_FONT(("font_cache_add(%s, %d, %8p) called.\n", NONULL(name), type, info));
font = (etfont_t *) MALLOC(sizeof(etfont_t));
font->name = StrDup(name);
font->type = type;
font->ref_cnt = 1;
switch (type) {
case FONT_TYPE_X: font->fontinfo.xfontinfo = (XFontStruct *) info; break;
case FONT_TYPE_TTF: break;
case FONT_TYPE_FNLIB: break;
default: break;
}
if (font_cache == NULL) {
font_cache = cur_font = font;
font->next = NULL;
} else {
cur_font->next = font;
font->next = NULL;
cur_font = font;
}
}
static void
font_cache_del(const void *info) {
etfont_t *current, *tmp;
D_FONT(("font_cache_del(%8p) called.\n", info));
if (font_cache == NULL) {
return;
}
if (((font_cache->type == FONT_TYPE_X) && (font_cache->fontinfo.xfontinfo == (XFontStruct *) info))) {
D_FONT((" -> Match found at font_cache (%8p). Font name is \"%s\"\n", font_cache, NONULL(font_cache->name)));
if (--(font_cache->ref_cnt) == 0) {
D_FONT((" -> Reference count is now 0. Deleting from cache.\n"));
current = font_cache;
font_cache = current->next;
XFreeFont(Xdisplay, (XFontStruct *) info);
FREE(current->name);
FREE(current);
} else {
D_FONT((" -> Reference count is %d. Returning.\n", font_cache->ref_cnt));
}
return;
} else if ((font_cache->type == FONT_TYPE_TTF) && (0)) {
} else if ((font_cache->type == FONT_TYPE_FNLIB) && (0)) {
} else {
for (current = font_cache; current->next; current = current->next) {
if (((current->next->type == FONT_TYPE_X) && (current->next->fontinfo.xfontinfo == (XFontStruct *) info))) {
D_FONT((" -> Match found at current->next (%8p, current == %8p). Font name is \"%s\"\n", current->next, current, NONULL(current->next->name)));
if (--(current->next->ref_cnt) == 0) {
D_FONT((" -> Reference count is now 0. Deleting from cache.\n"));
tmp = current->next;
current->next = current->next->next;
XFreeFont(Xdisplay, (XFontStruct *) info);
FREE(tmp->name);
FREE(tmp);
} else {
D_FONT((" -> Reference count is %d. Returning.\n", font_cache->ref_cnt));
}
return;
} else if ((current->next->type == FONT_TYPE_TTF) && (0)) {
} else if ((current->next->type == FONT_TYPE_FNLIB) && (0)) {
}
}
}
}
static etfont_t *
font_cache_find(const char *name, unsigned char type) {
etfont_t *current;
ASSERT_RVAL(name != NULL, NULL);
D_FONT(("font_cache_find(%s, %d) called.\n", NONULL(name), type));
for (current = font_cache; current; current = current->next) {
D_FONT((" -> Checking current (%8p), type == %d, name == %s\n", current, current->type, NONULL(current->name)));
if ((current->type == type) && !strcasecmp(current->name, name)) {
D_FONT((" -> Match!\n"));
return (current);
}
}
D_FONT(("font_cache_find(): No matches found. =(\n"));
return ((etfont_t *) NULL);
}
static void *
font_cache_find_info(const char *name, unsigned char type) {
etfont_t *current;
ASSERT_RVAL(name != NULL, NULL);
D_FONT(("font_cache_find_info(%s, %d) called.\n", NONULL(name), type));
for (current = font_cache; current; current = current->next) {
D_FONT((" -> Checking current (%8p), type == %d, name == %s\n", current, current->type, NONULL(current->name)));
if ((current->type == type) && !strcasecmp(current->name, name)) {
D_FONT((" -> Match!\n"));
switch (type) {
case FONT_TYPE_X: return ((void *) current->fontinfo.xfontinfo); break;
case FONT_TYPE_TTF: return (NULL); break;
case FONT_TYPE_FNLIB: return (NULL); break;
default: return (NULL); break;
}
}
}
D_FONT(("font_cache_find_info(): No matches found. =(\n"));
return (NULL);
}
void *
load_font(const char *name, const char *fallback, unsigned char type)
{
etfont_t *font;
XFontStruct *xfont;
D_FONT(("load_font(%s, %s, %d) called.\n", NONULL(name), NONULL(fallback), type));
if (type == 0) {
type = FONT_TYPE_X;
}
if (name == NULL) {
if (fallback) {
name = fallback;
fallback = "fixed";
} else {
name = "fixed";
fallback = "-misc-fixed-medium-r-normal--13-120-75-75-c-60-iso8859-1";
}
} else if (fallback == NULL) {
fallback = "fixed";
}
D_FONT((" -> Using name == \"%s\" and fallback == \"%s\"\n", name, fallback));
if ((font = font_cache_find(name, type)) != NULL) {
font_cache_add_ref(font);
D_FONT((" -> Font found in cache. Incrementing reference count to %d and returning existing data.\n", font->ref_cnt));
switch (type) {
case FONT_TYPE_X: return ((void *) font->fontinfo.xfontinfo); break;
case FONT_TYPE_TTF: return (NULL); break;
case FONT_TYPE_FNLIB: return (NULL); break;
default: return (NULL); break;
}
}
if (type == FONT_TYPE_X) {
if ((xfont = XLoadQueryFont(Xdisplay, name)) == NULL) {
print_error("Unable to load font \"%s\". Falling back on \"%s\"\n", name, fallback);
if ((xfont = XLoadQueryFont(Xdisplay, fallback)) == NULL) {
fatal_error("Couldn't load the fallback font either. Giving up.");
} else {
font_cache_add(fallback, type, (void *) xfont);
}
} else {
font_cache_add(name, type, (void *) xfont);
}
return ((void *) xfont);
} else if (type == FONT_TYPE_TTF) {
return (NULL);
} else if (type == FONT_TYPE_FNLIB) {
return (NULL);
}
ASSERT_NOTREACHED_RVAL(NULL);
}
void
free_font(const void *info)
{
ASSERT(info != NULL);
font_cache_del(info);
}
void
change_font(int init, const char *fontname)
{
#ifndef NO_BOLDFONT
static XFontStruct *boldFont = NULL;
#endif
static short fnum = FONT0_IDX;
short idx = 0;
int fh, fw = 0;
register unsigned long i;
register int cw;
if (!init) {
ASSERT(fontname != NULL);
switch (fontname[0]) {
case '\0':
fnum = FONT0_IDX;
fontname = NULL;
break;
/* special (internal) prefix for font commands */
case FONT_CMD:
idx = atoi(fontname + 1);
switch (fontname[1]) {
case '+': /* corresponds to FONT_UP */
fnum += (idx ? idx : 1);
fnum = FNUM_RANGE(fnum);
break;
case '-': /* corresponds to FONT_DN */
fnum += (idx ? idx : -1);
fnum = FNUM_RANGE(fnum);
break;
default:
if (fontname[1] != '\0' && !isdigit(fontname[1]))
return;
if (idx < 0 || idx >= (NFONTS))
return;
fnum = IDX2FNUM(idx);
break;
}
fontname = NULL;
break;
default:
for (idx = 0; idx < NFONTS; idx++) {
if (!strcmp(rs_font[idx], fontname)) {
fnum = IDX2FNUM(idx);
fontname = NULL;
break;
}
}
break;
}
idx = FNUM2IDX(fnum);
if ((fontname != NULL) && strcasecmp(rs_font[idx], fontname)) {
RESET_AND_ASSIGN(rs_font[idx], StrDup(fontname));
}
}
if (TermWin.font) {
if (font_cache_find_info(rs_font[idx], FONT_TYPE_X) != TermWin.font) {
free_font(TermWin.font);
TermWin.font = load_font(rs_font[idx], "fixed", FONT_TYPE_X);
}
} else {
TermWin.font = load_font(rs_font[idx], "fixed", FONT_TYPE_X);
}
#ifndef NO_BOLDFONT
if (init && rs_boldFont != NULL) {
boldFont = load_font(rs_boldFont, "-misc-fixed-bold-r-semicondensed--13-120-75-75-c-60-iso8859-1", FONT_TYPE_X);
}
#endif
#ifdef MULTI_CHARSET
if (TermWin.mfont) {
if (font_cache_find_info(rs_mfont[idx], FONT_TYPE_X) != TermWin.mfont) {
free_font(TermWin.mfont);
TermWin.mfont = load_font(rs_mfont[idx], "k14", FONT_TYPE_X);
}
} else {
TermWin.mfont = load_font(rs_mfont[idx], "k14", FONT_TYPE_X);
}
# ifdef USE_XIM
if (Input_Context) {
if (TermWin.fontset) {
XFreeFontSet(Xdisplay, TermWin.fontset);
}
TermWin.fontset = create_fontset(rs_font[idx], rs_mfont[idx]);
xim_set_fontset();
}
# endif
#endif /* MULTI_CHARSET */
if (!init) {
XSetFont(Xdisplay, TermWin.gc, TermWin.font->fid);
}
fw = TermWin.font->min_bounds.width;
fh = TermWin.font->ascent + TermWin.font->descent + rs_line_space;
D_FONT(("Font information: Ascent == %hd, Descent == %hd\n", TermWin.font->ascent, TermWin.font->descent));
if (TermWin.font->min_bounds.width == TermWin.font->max_bounds.width)
TermWin.fprop = 0; /* Mono-spaced (fixed width) font */
else
TermWin.fprop = 1; /* Proportional font */
if (TermWin.fprop == 1)
for (i = TermWin.font->min_char_or_byte2; i <= TermWin.font->max_char_or_byte2; i++) {
cw = TermWin.font->per_char[i].width;
MAX_IT(fw, cw);
}
/* not the first time thru and sizes haven't changed */
if (fw == TermWin.fwidth && fh == TermWin.fheight)
return; /* TODO: not return; check MULTI_CHARSET if needed */
TermWin.fwidth = fw;
TermWin.fheight = fh;
/* check that size of boldFont is okay */
#ifndef NO_BOLDFONT
TermWin.boldFont = NULL;
if (boldFont != NULL) {
fw = boldFont->min_bounds.width;
fh = boldFont->ascent + boldFont->descent + rs_line_space;
if (TermWin.fprop == 0) { /* bold font must also be monospaced */
if (fw != boldFont->max_bounds.width)
fw = -1;
} else {
for (i = 0; i < 256; i++) {
if (!isprint(i))
continue;
cw = boldFont->per_char[i].width;
MAX_IT(fw, cw);
}
}
if (fw == TermWin.fwidth && fh == TermWin.fheight) {
TermWin.boldFont = boldFont;
}
}
#endif /* NO_BOLDFONT */
set_colorfgbg();
TermWin.width = TermWin.ncol * TermWin.fwidth;
TermWin.height = TermWin.nrow * TermWin.fheight;
szHint.width_inc = TermWin.fwidth;
szHint.height_inc = TermWin.fheight;
szHint.min_width = szHint.base_width + szHint.width_inc;
szHint.min_height = szHint.base_height + szHint.height_inc;
szHint.width = szHint.base_width + TermWin.width;
szHint.height = szHint.base_height + TermWin.height;
szHint.flags = PMinSize | PResizeInc | PBaseSize | PWinGravity;
if (!init) {
font_change_count++;
parent_resize();
}
return;
}
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