-/* Fontset handler.
- Copyright (C) 1995, 1997 Electrotechnical Laboratory, JAPAN.
- Licensed to the Free Software Foundation.
-
-This file is part of GNU Emacs.
-
-GNU Emacs 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, or (at your option)
-any later version.
-
-GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-#include <config.h>
-#if HAVE_ALLOCA_H
-#include <alloca.h>
-#endif /* HAVE_ALLOCA_H */
-#include "lisp.h"
-#include "charset.h"
-#include "ccl.h"
-#include "fontset.h"
-#include "frame.h"
-
-Lisp_Object Vglobal_fontset_alist;
-Lisp_Object Vfont_encoding_alist;
-Lisp_Object Vuse_default_ascent;
-Lisp_Object Valternative_fontname_alist;
-Lisp_Object Vfontset_alias_alist;
-Lisp_Object Vhighlight_wrong_size_font;
-Lisp_Object Vclip_large_size_font;
-
-/* Used as a temporary in macro FS_LOAD_FONT. */
-int font_idx_temp;
-
-/* We had better have our own strcasecmp function because some system
- doesn't have it. */
-static char my_strcasetbl[256];
-
-/* Compare two strings S0 and S1 while ignoring differences in case.
- Return 1 if they differ, else return 0. */
-static int
-my_strcasecmp (s0, s1)
- unsigned char *s0, *s1;
-{
- while (*s0)
- if (my_strcasetbl[*s0++] != my_strcasetbl[*s1++]) return 1;
- return (int) *s1;
-}
-
-/* The following six are window system dependent functions. See
- the comments in src/fontset.h for more detail. */
-
-/* Return a pointer to struct font_info of font FONT_IDX of frame F. */
-struct font_info *(*get_font_info_func) (/* FRAME_PTR f; int font_idx */);
-
-/* Return a list of font names which matches PATTERN. See the document of
- `x-list-fonts' for more detail. */
-Lisp_Object (*list_fonts_func) (/* Lisp_Object pattern, face, frame, width */);
-
-/* Load a font named NAME for frame F and return a pointer to the
- information of the loaded font. If loading is failed, return 0. */
-struct font_info *(*load_font_func) (/* FRAME_PTR f; char *name */);
-
-/* Return a pointer to struct font_info of a font named NAME for frame F. */
-struct font_info *(*query_font_func) (/* FRAME_PTR f; char *name */);
-
-/* Additional function for setting fontset or changing fontset
- contents of frame F. */
-void (*set_frame_fontset_func) (/* FRAME_PTR f; Lisp_Object arg, oldval */);
-
-/* Check if any window system is used now. */
-void (*check_window_system_func) ();
-
-struct fontset_data *
-alloc_fontset_data ()
-{
- struct fontset_data *fontset_data
- = (struct fontset_data *) xmalloc (sizeof (struct fontset_data));
-
- bzero (fontset_data, sizeof (struct fontset_data));
-
- return fontset_data;
-}
-
-void
-free_fontset_data (fontset_data)
- struct fontset_data *fontset_data;
-{
- int i;
-
- for (i = 0; i < fontset_data->n_fontsets; i++)
- {
- int j;
-
- xfree (fontset_data->fontset_table[i]->name);
- for (j = 0; j <= MAX_CHARSET; j++)
- if (fontset_data->fontset_table[i]->fontname[j])
- xfree (fontset_data->fontset_table[i]->fontname[j]);
- xfree (fontset_data->fontset_table[i]);
- }
- xfree (fontset_data->fontset_table);
-
- xfree (fontset_data);
-}
-
-/* Load a font named FONTNAME for displaying CHARSET on frame F.
- All fonts for frame F is stored in a table pointed by FONT_TABLE.
- Return a pointer to the struct font_info of the loaded font.
- If loading fails, return 0;
- If FONTNAME is NULL, the name is taken from the information of FONTSET.
- If FONTSET is given, try to load a font whose size matches that of
- FONTSET, and, the font index is stored in the table for FONTSET.
-
- If you give FONTSET argument, don't call this function directry,
- instead call macro FS_LOAD_FONT with the same argument. */
-
-struct font_info *
-fs_load_font (f, font_table, charset, fontname, fontset)
- FRAME_PTR f;
- struct font_info *font_table;
- int charset, fontset;
- char *fontname;
-{
- Lisp_Object font_list;
- Lisp_Object list, elt;
- int font_idx;
- int size = 0;
- struct fontset_info *fontsetp = 0;
- struct font_info *fontp;
-
- if (fontset >= 0 && fontset < FRAME_FONTSET_DATA (f)->n_fontsets)
- {
- fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[fontset];
- font_idx = fontsetp->font_indexes[charset];
- if (font_idx >= 0)
- /* We have already loaded a font. */
- return font_table + font_idx;
- else if (font_idx == FONT_NOT_FOUND)
- /* We have already tried loading a font and failed. */
- return 0;
- if (!fontname)
- fontname = fontsetp->fontname[charset];
- }
-
- if (!fontname)
- /* No way to get fontname. */
- return 0;
-
- /* If CHARSET is not ASCII and FONTSET is specified, we must load a
- font of appropriate size to be used with other fonts in this
- fontset. */
- if (charset != CHARSET_ASCII && fontsetp)
- {
- /* If we have not yet loaded ASCII font of FONTSET, we must load
- it now to decided the size and height of this fontset. */
- if (fontsetp->size == 0)
- {
- fontp = fs_load_font (f, font_table, CHARSET_ASCII, 0, fontset);
- if (!fontp)
- /* Any fontset should contain avairable ASCII. */
- return 0;
- }
- /* Now we have surely decided the size of this fontset. */
- size = fontsetp->size * CHARSET_WIDTH (charset);
- }
-
- fontp = (*load_font_func) (f, fontname, size);
-
- if (!fontp)
- {
- if (fontsetp)
- fontsetp->font_indexes[charset] = FONT_NOT_FOUND;
- return 0;
- }
-
- /* Fill in fields (CHARSET, ENCODING, and FONT_ENCODER) which are
- not set by (*load_font_func). */
- fontp->charset = charset;
-
- if (fontp->encoding[1] != FONT_ENCODING_NOT_DECIDED)
- {
- /* The font itself tells which code points to be used. Use this
- encoding for all other charsets. */
- int i;
-
- fontp->encoding[0] = fontp->encoding[1];
- for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
- fontp->encoding[i] = fontp->encoding[1];
- }
- else
- {
- /* The font itself doesn't tell which code points to be used. */
- int i;
-
- /* At first, set 1 (means 0xA0..0xFF) as the default. */
- fontp->encoding[0] = 1;
- for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
- fontp->encoding[i] = 1;
- /* Then override them by a specification in Vfont_encoding_alist. */
- for (list = Vfont_encoding_alist; CONSP (list); list = XCONS (list)->cdr)
- {
- elt = XCONS (list)->car;
- if (CONSP (elt)
- && STRINGP (XCONS (elt)->car) && CONSP (XCONS (elt)->cdr)
- && (fast_c_string_match_ignore_case (XCONS (elt)->car, fontname)
- >= 0))
- {
- Lisp_Object tmp;
-
- for (tmp = XCONS (elt)->cdr; CONSP (tmp); tmp = XCONS (tmp)->cdr)
- if (CONSP (XCONS (tmp)->car)
- && ((i = get_charset_id (XCONS (XCONS (tmp)->car)->car))
- >= 0)
- && INTEGERP (XCONS (XCONS (tmp)->car)->cdr)
- && XFASTINT (XCONS (XCONS (tmp)->car)->cdr) < 4)
- fontp->encoding[i]
- = XFASTINT (XCONS (XCONS (tmp)->car)->cdr);
- }
- }
- }
-
- fontp->font_encoder = (struct ccl_program *) 0;
- for (list = Vfont_ccl_encoder_alist; CONSP (list); list = XCONS (list)->cdr)
- {
- elt = XCONS (list)->car;
- if (CONSP (elt)
- && STRINGP (XCONS (elt)->car) && VECTORP (XCONS (elt)->cdr)
- && fast_c_string_match_ignore_case (XCONS (elt)->car, fontname) >= 0)
- {
- fontp->font_encoder
- = (struct ccl_program *) xmalloc (sizeof (struct ccl_program));
- setup_ccl_program (fontp->font_encoder, XCONS (elt)->cdr);
- break;
- }
- }
-
- /* If FONTSET is specified, setup various fields of it. */
- if (fontsetp)
- {
- fontsetp->font_indexes[charset] = fontp->font_idx;
- if (charset == CHARSET_ASCII)
- {
- /* Decide or change the size and height of this fontset. */
- if (fontsetp->size == 0)
- {
- fontsetp->size = fontp->size;
- fontsetp->height = fontp->height;
- }
- else if (fontsetp->size != fontp->size
- || fontsetp->height != fontp->height)
- {
- /* When loading ASCII font of the different size from
- the size of FONTSET, we have to update the size of
- FONTSET. Since changing the size of FONTSET may make
- some fonts already loaded inappropriate to be used in
- FONTSET, we must delete the record of such fonts. In
- that case, we also have to calculate the height of
- FONTSET from the remaining fonts. */
- int i;
-
- fontsetp->size = fontp->size;
- fontsetp->height = fontp->height;
- for (i = CHARSET_ASCII + 1; i <= MAX_CHARSET; i++)
- {
- font_idx = fontsetp->font_indexes[i];
- if (font_idx >= 0)
- {
- struct font_info *fontp2 = font_table + font_idx;
-
- if (fontp2->size != fontp->size * CHARSET_WIDTH (i))
- fontsetp->font_indexes[i] = FONT_NOT_OPENED;
- /* The following code should be disabled until
- Emacs supports variable height lines. */
-#if 0
- else if (fontsetp->height < fontp->height)
- fontsetp->height = fontp->height;
-#endif
- }
- }
- }
- }
- }
-
- return fontp;
-}
-
-/* Return ID of the fontset named NAME on frame F. */
-
-int
-fs_query_fontset (f, name)
- FRAME_PTR f;
- char *name;
-{
- struct fontset_data *fontset_data = FRAME_FONTSET_DATA (f);
- int i;
-
- for (i = 0; i < fontset_data->n_fontsets; i++)
- if (!my_strcasecmp(name, fontset_data->fontset_table[i]->name))
- return i;
- return -1;
-}
-
-/* Register a fontset specified by FONTSET_INFO for frame FRAME.
- Return the fontset ID if successfully registered, else return -1.
- FONTSET_INFO is a cons of name of the fontset and FONTLIST, where
- FONTLIST is an alist of charsets vs fontnames. */
-
-int
-fs_register_fontset (f, fontset_info)
- FRAME_PTR f;
- Lisp_Object fontset_info;
-{
- struct fontset_data *fontset_data = FRAME_FONTSET_DATA (f);
- Lisp_Object name, fontlist;
- int fontset;
- struct fontset_info *fontsetp;
- int i;
-
- if (!CONSP (fontset_info)
- || !STRINGP (XCONS (fontset_info)->car)
- || !CONSP (XCONS (fontset_info)->cdr))
- /* Invalid data in FONTSET_INFO. */
- return -1;
-
- name = XCONS (fontset_info)->car;
- if ((fontset = fs_query_fontset (f, XSTRING (name)->data)) >= 0)
- /* This fontset already exists on frame F. */
- return fontset;
-
- fontsetp = (struct fontset_info *) xmalloc (sizeof (struct fontset_info));
-
- fontsetp->name = (char *) xmalloc (XSTRING (name)->size + 1);
- bcopy(XSTRING (name)->data, fontsetp->name, XSTRING (name)->size + 1);
-
- fontsetp->size = fontsetp->height = 0;
-
- for (i = 0; i <= MAX_CHARSET; i++)
- {
- fontsetp->fontname[i] = (char *) 0;
- fontsetp->font_indexes[i] = FONT_NOT_OPENED;
- }
-
- for (fontlist = XCONS (fontset_info)->cdr; CONSP (fontlist);
- fontlist = XCONS (fontlist)->cdr)
- {
- Lisp_Object tem = Fcar (fontlist);
- int charset;
-
- if (CONSP (tem)
- && (charset = get_charset_id (XCONS (tem)->car)) >= 0
- && STRINGP (XCONS (tem)->cdr))
- {
- fontsetp->fontname[charset]
- = (char *) xmalloc (XSTRING (XCONS (tem)->cdr)->size + 1);
- bcopy (XSTRING (XCONS (tem)->cdr)->data,
- fontsetp->fontname[charset],
- XSTRING (XCONS (tem)->cdr)->size + 1);
- }
- else
- /* Broken or invalid data structure. */
- return -1;
- }
-
- /* Do we need to create the table? */
- if (fontset_data->fontset_table_size == 0)
- {
- fontset_data->fontset_table_size = 8;
- fontset_data->fontset_table
- = (struct fontset_info **) xmalloc (fontset_data->fontset_table_size
- * sizeof (struct fontset_info *));
- }
- /* Do we need to grow the table? */
- else if (fontset_data->n_fontsets >= fontset_data->fontset_table_size)
- {
- fontset_data->fontset_table_size += 8;
- fontset_data->fontset_table
- = (struct fontset_info **) xrealloc (fontset_data->fontset_table,
- fontset_data->fontset_table_size
- * sizeof (struct fontset_info *));
- }
- fontset = fontset_data->n_fontsets++;
- fontset_data->fontset_table[fontset] = fontsetp;
-
- return fontset;
-}
-
-/* Cache data used by fontset_pattern_regexp. The car part is a
- pattern string containing at least one wild card, the cdr part is
- the corresponding regular expression. */
-static Lisp_Object Vcached_fontset_data;
-
-#define CACHED_FONTSET_NAME (XSTRING (XCONS (Vcached_fontset_data)->car)->data)
-#define CACHED_FONTSET_REGEX (XCONS (Vcached_fontset_data)->cdr)
-
-/* If fontset name PATTERN contains any wild card, return regular
- expression corresponding to PATTERN. */
-
-Lisp_Object
-fontset_pattern_regexp (pattern)
- Lisp_Object pattern;
-{
- if (!index (XSTRING (pattern)->data, '*')
- && !index (XSTRING (pattern)->data, '?'))
- /* PATTERN does not contain any wild cards. */
- return Qnil;
-
- if (!CONSP (Vcached_fontset_data)
- || strcmp (XSTRING (pattern)->data, CACHED_FONTSET_NAME))
- {
- /* We must at first update the cached data. */
- char *regex = (char *) alloca (XSTRING (pattern)->size * 2);
- char *p0, *p1 = regex;
-
- /* Convert "*" to ".*", "?" to ".". */
- *p1++ = '^';
- for (p0 = (char *) XSTRING (pattern)->data; *p0; p0++)
- {
- if (*p0 == '*')
- {
- *p1++ = '.';
- *p1++ = '*';
- }
- else if (*p0 == '?')
- *p1++ == '.';
- else
- *p1++ = *p0;
- }
- *p1++ = '$';
- *p1++ = 0;
-
- Vcached_fontset_data = Fcons (build_string (XSTRING (pattern)->data),
- build_string (regex));
- }
-
- return CACHED_FONTSET_REGEX;
-}
-
-DEFUN ("query-fontset", Fquery_fontset, Squery_fontset, 1, 1, 0,
- "Return a fontset name which matches PATTERN, nil if no matching fontset.\n\
-PATTERN can contain `*' or `?' as a wild card\n\
-just like X's font name matching algorithm allows.")
- (pattern)
- Lisp_Object pattern;
-{
- Lisp_Object regexp, tem;
-
- (*check_window_system_func) ();
-
- CHECK_STRING (pattern, 0);
-
- if (XSTRING (pattern)->size == 0)
- return Qnil;
-
- tem = Frassoc (pattern, Vfontset_alias_alist);
- if (!NILP (tem))
- return Fcar (tem);
-
- regexp = fontset_pattern_regexp (pattern);
-
- for (tem = Vglobal_fontset_alist; CONSP (tem); tem = XCONS (tem)->cdr)
- {
- Lisp_Object fontset_name = XCONS (XCONS (tem)->car)->car;
- if (!NILP (regexp))
- {
- if (fast_c_string_match_ignore_case (regexp,
- XSTRING (fontset_name)->data)
- >= 0)
- return fontset_name;
- }
- else
- {
- if (!my_strcasecmp (XSTRING (pattern)->data,
- XSTRING (fontset_name)->data))
- return fontset_name;
- }
- }
-
- return Qnil;
-}
-
-Lisp_Object Fframe_char_width ();
-
-/* Return a list of names of available fontsets matching PATTERN on
- frame F. If SIZE is not 0, it is the size (maximum bound width) of
- fontsets to be listed. */
-
-Lisp_Object
-list_fontsets (f, pattern, size)
- FRAME_PTR f;
- Lisp_Object pattern;
- int size;
-{
- int i;
- Lisp_Object regexp, val;
-
- regexp = fontset_pattern_regexp (pattern);
-
- val = Qnil;
- for (i = 0; i < FRAME_FONTSET_DATA (f)->n_fontsets; i++)
- {
- struct fontset_info *fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[i];
- int name_matched = 0;
- int size_matched = 0;
-
- if (!NILP (regexp))
- {
- if (fast_c_string_match_ignore_case (regexp, fontsetp->name) >= 0)
- name_matched = 1;
- }
- else
- {
- if (!my_strcasecmp (XSTRING (pattern)->data, fontsetp->name))
- name_matched = 1;
- }
-
- if (name_matched)
- {
- if (!size || fontsetp->size == size)
- size_matched = 1;
- else if (fontsetp->size == 0)
- {
- /* No font of this fontset has loaded yet. Try loading
- one with SIZE. */
- int j;
-
- for (j = 0; j <= MAX_CHARSET; j++)
- if (fontsetp->fontname[j])
- {
- if ((*load_font_func) (f, fontsetp->fontname[j], size))
- size_matched = 1;
- break;
- }
- }
-
- if (size_matched)
- val = Fcons (build_string (fontsetp->name), val);
- }
- }
-
- return val;
-}
-
-DEFUN ("new-fontset", Fnew_fontset, Snew_fontset, 2, 2, 0,
- "Create a new fontset NAME which contains fonts in FONTLIST.\n\
-FONTLIST is an alist of charsets vs corresponding font names.")
- (name, fontlist)
- Lisp_Object name, fontlist;
-{
- Lisp_Object fullname, fontset_info;
- Lisp_Object tail;
-
- (*check_window_system_func) ();
-
- CHECK_STRING (name, 0);
- CHECK_LIST (fontlist, 1);
-
- fullname = Fquery_fontset (name);
- if (!NILP (fullname))
- error ("Fontset \"%s\" matches the existing fontset \"%s\"",
- XSTRING (name)->data, XSTRING (fullname)->data);
-
- /* Check the validity of FONTLIST. */
- for (tail = fontlist; CONSP (tail); tail = XCONS (tail)->cdr)
- {
- Lisp_Object tem = XCONS (tail)->car;
- int charset;
-
- if (!CONSP (tem)
- || (charset = get_charset_id (XCONS (tem)->car)) < 0
- || !STRINGP (XCONS (tem)->cdr))
- error ("Elements of fontlist must be a cons of charset and font name");
- }
-
- fontset_info = Fcons (name, fontlist);
- Vglobal_fontset_alist = Fcons (fontset_info, Vglobal_fontset_alist);
-
- /* Register this fontset for all existing frames. */
- {
- Lisp_Object framelist, frame;
-
- FOR_EACH_FRAME (framelist, frame)
- if (!FRAME_TERMCAP_P (XFRAME (frame)))
- fs_register_fontset (XFRAME (frame), fontset_info);
- }
-
- return Qnil;
-}
-
-extern Lisp_Object Fframe_parameters ();
-extern Lisp_Object Qfont;
-Lisp_Object Qfontset;
-
-DEFUN ("set-fontset-font", Fset_fontset_font, Sset_fontset_font, 3, 4, 0,
- "Set FONTNAME for a font of CHARSET in fontset NAME on frame FRAME.\n\
-If FRAME is omitted or nil, all frames are affected.")
- (name, charset_symbol, fontname, frame)
- Lisp_Object name, charset_symbol, fontname, frame;
-{
- int charset;
- Lisp_Object fullname, fontlist;
-
- (*check_window_system_func) ();
-
- CHECK_STRING (name, 0);
- CHECK_SYMBOL (charset_symbol, 1);
- CHECK_STRING (fontname, 2);
- if (!NILP (frame))
- CHECK_LIVE_FRAME (frame, 3);
-
- if ((charset = get_charset_id (charset_symbol)) < 0)
- error ("Invalid charset: %s", XSYMBOL (charset_symbol)->name->data);
-
- fullname = Fquery_fontset (name);
- if (NILP (fullname))
- error ("Fontset \"%s\" does not exist", XSTRING (name)->data);
-
- /* If FRAME is not specified, we must, at first, update contents of
- `global-fontset-alist' for a frame created in the future. */
- if (NILP (frame))
- {
- Lisp_Object fontset_info = Fassoc (fullname, Vglobal_fontset_alist);
- Lisp_Object tem = Fassq (charset_symbol, XCONS (fontset_info)->cdr);
-
- if (NILP (tem))
- XCONS (fontset_info)->cdr
- = Fcons (Fcons (charset_symbol, fontname),
- XCONS (fontset_info)->cdr);
- else
- XCONS (tem)->cdr = fontname;
- }
-
- /* Then, update information in the specified frame or all existing
- frames. */
- {
- Lisp_Object framelist, tem;
-
- FOR_EACH_FRAME (framelist, tem)
- if (!FRAME_TERMCAP_P (XFRAME (tem))
- && (NILP (frame) || EQ (frame, tem)))
- {
- FRAME_PTR f = XFRAME (tem);
- int fontset = fs_query_fontset (f, XSTRING (fullname)->data);
- struct fontset_info *fontsetp
- = FRAME_FONTSET_DATA (f)->fontset_table[fontset];
-
- if (fontsetp->fontname[charset])
- xfree (fontsetp->fontname[charset]);
- fontsetp->fontname[charset]
- = (char *) xmalloc (XSTRING (fontname)->size + 1);
- bcopy (XSTRING (fontname)->data, fontsetp->fontname[charset],
- XSTRING (fontname)->size + 1);
- fontsetp->font_indexes[charset] = FONT_NOT_OPENED;
-
- if (charset == CHARSET_ASCII)
- {
- Lisp_Object font_param = Fassq (Qfont, Fframe_parameters (tem));
-
- if (set_frame_fontset_func
- && !NILP (font_param)
- && !strcmp (XSTRING (fullname)->data,
- XSTRING (XCONS (font_param)->cdr)->data))
- /* This fontset is the default fontset on frame TEM.
- We may have to resize this frame because of new
- ASCII font. */
- (*set_frame_fontset_func) (f, fullname, Qnil);
- }
- }
- }
-
- return Qnil;
-}
-
-DEFUN ("font-info", Ffont_info, Sfont_info, 1, 2, 0,
- "Return information about a font named NAME on frame FRAME.\n\
-If FRAME is omitted or nil, use the selected frame.\n\
-The returned value is a vector of OPENED-NAME, FULL-NAME, CHARSET, SIZE,\n\
- HEIGHT, BASELINE-OFFSET, RELATIVE-COMPOSE, and DEFAULT-ASCENT,\n\
-where\n\
- OPENED-NAME is the name used for opening the font,\n\
- FULL-NAME is the full name of the font,\n\
- CHARSET is the charset displayed by the font,\n\
- SIZE is the minimum bound width of the font,\n\
- HEIGHT is the height of the font,\n\
- BASELINE-OFFSET is the upward offset pixels from ASCII baseline,\n\
- RELATIVE-COMPOSE and DEFAULT-ASCENT are the numbers controlling\n\
- how to compose characters.\n\
-If the named font is not yet loaded, return nil.")
- (name, frame)
- Lisp_Object name, frame;
-{
- FRAME_PTR f;
- struct font_info *fontp;
- Lisp_Object info;
-
- (*check_window_system_func) ();
-
- CHECK_STRING (name, 0);
- if (NILP (frame))
- f = selected_frame;
- else
- {
- CHECK_LIVE_FRAME (frame, 1);
- f = XFRAME (frame);
- }
-
- if (!query_font_func)
- error ("Font query function is not supported");
-
- fontp = (*query_font_func) (f, XSTRING (name)->data);
- if (!fontp)
- return Qnil;
-
- info = Fmake_vector (make_number (8), Qnil);
-
- XVECTOR (info)->contents[0] = build_string (fontp->name);
- XVECTOR (info)->contents[1] = build_string (fontp->full_name);
- XVECTOR (info)->contents[2] = CHARSET_SYMBOL (fontp->charset);
- XVECTOR (info)->contents[3] = make_number (fontp->size);
- XVECTOR (info)->contents[4] = make_number (fontp->height);
- XVECTOR (info)->contents[5] = make_number (fontp->baseline_offset);
- XVECTOR (info)->contents[6] = make_number (fontp->relative_compose);
- XVECTOR (info)->contents[7] = make_number (fontp->default_ascent);
-
- return info;
-}
-
-DEFUN ("fontset-info", Ffontset_info, Sfontset_info, 1, 2, 0,
- "Return information about a fontset named NAME on frame FRAME.\n\
-If FRAME is omitted or nil, use the selected frame.\n\
-The returned value is a vector of SIZE, HEIGHT, and FONT-LIST,\n\
-where\n\
- SIZE is the minimum bound width of ASCII font of the fontset,\n\
- HEIGHT is the height of the tallest font in the fontset, and\n\
- FONT-LIST is an alist of the format:\n\
- (CHARSET REQUESTED-FONT-NAME LOADED-FONT-NAME).\n\
-LOADED-FONT-NAME t means the font is not yet loaded, nil means the\n\
-loading failed.")
- (name, frame)
- Lisp_Object name, frame;
-{
- FRAME_PTR f;
- int fontset;
- struct fontset_info *fontsetp;
- Lisp_Object info, val;
- int i;
-
- (*check_window_system_func) ();
-
- CHECK_STRING(name, 0);
- if (NILP (frame))
- f = selected_frame;
- else
- {
- CHECK_LIVE_FRAME (frame, 1);
- f = XFRAME (frame);
- }
-
- fontset = fs_query_fontset (f, XSTRING (name)->data);
- if (fontset < 0)
- error ("Fontset \"%s\" does not exist", XSTRING (name)->data);
-
- info = Fmake_vector (make_number (3), Qnil);
-
- fontsetp = FRAME_FONTSET_DATA (f)->fontset_table[fontset];
-
- XVECTOR (info)->contents[0] = make_number (fontsetp->size);
- XVECTOR (info)->contents[1] = make_number (fontsetp->height);
- val = Qnil;
- for (i = 0; i <= MAX_CHARSET; i++)
- if (fontsetp->fontname[i])
- {
- int font_idx = fontsetp->font_indexes[i];
- Lisp_Object loaded;
-
- if (font_idx == FONT_NOT_OPENED)
- loaded = Qt;
- else if (font_idx == FONT_NOT_FOUND)
- loaded = Qnil;
- else
- loaded
- = build_string ((*get_font_info_func) (f, font_idx)->full_name);
- val = Fcons (Fcons (CHARSET_SYMBOL (i),
- Fcons (build_string (fontsetp->fontname[i]),
- Fcons (loaded, Qnil))),
- val);
- }
- XVECTOR (info)->contents[2] = val;
- return info;
-}
-
-syms_of_fontset ()
-{
- int i;
-
- for (i = 0; i < 256; i++)
- my_strcasetbl[i] = (i >= 'A' && i <= 'Z') ? i + 'a' - 'A' : i;
-
- if (!load_font_func)
- /* Window system initializer should have set proper functions. */
- abort ();
-
- Qfontset = intern ("fontset");
- staticpro (&Qfontset);
-
- Vcached_fontset_data = Qnil;
- staticpro (&Vcached_fontset_data);
-
- DEFVAR_LISP ("global-fontset-alist", &Vglobal_fontset_alist,
- "Internal data for fontset. Not for external use.\n\
-This is an alist associating fontset names with the lists of fonts\n\
- contained in them.\n\
-Newly created frames make their own fontset database from here.");
- Vglobal_fontset_alist = Qnil;
-
- DEFVAR_LISP ("font-encoding-alist", &Vfont_encoding_alist,
- "Alist of fontname patterns vs corresponding encoding info.\n\
-Each element looks like (REGEXP . ENCODING-INFO),\n\
- where ENCODING-INFO is an alist of CHARSET vs ENCODING.\n\
-ENCODING is one of the following integer values:\n\
- 0: code points 0x20..0x7F or 0x2020..0x7F7F are used,\n\
- 1: code points 0xA0..0xFF or 0xA0A0..0xFFFF are used,\n\
- 2: code points 0x20A0..0x7FFF are used,\n\
- 3: code points 0xA020..0xFF7F are used.");
- Vfont_encoding_alist = Qnil;
-
- DEFVAR_LISP ("use-default-ascent", &Vuse_default_ascent,
- "Char table of characters of which ascent values should be ignored.\n\
-If an entry for a character is non-nil, the ascent value of the glyph\n\
-is assumed to be what specified by _MULE_DEFAULT_ASCENT property of a font.");
- Vuse_default_ascent = Qnil;
-
- DEFVAR_LISP ("alternative-fontname-alist", &Valternative_fontname_alist,
- "Alist of fontname vs list of the alternative fontnames.\n\
-When no font can be opened by a fontname, the corresponding\n\
-alternative fontnames are tried.");
- Valternative_fontname_alist = Qnil;
-
- DEFVAR_LISP ("fontset-alias-alist", &Vfontset_alias_alist,
- "Alist of fontset names vs the aliases.");
- Vfontset_alias_alist = Qnil;
-
- DEFVAR_LISP ("highlight-wrong-size-font", &Vhighlight_wrong_size_font,
- "*Non-nil means highlight characters shown in wrong size fonts somehow.\n\
-The way to highlight them depends on window system on which Emacs runs.\n\
-On X window, a rectangle is shown around each such character.");
- Vhighlight_wrong_size_font = Qt;
-
- DEFVAR_LISP ("clip-large-size-font", &Vclip_large_size_font,
- "*Non-nil means characters shown in large size fonts are clipped.\n\
-The height of clipping area is the same as that of an ASCII character.\n\
-The width of the area is the same as that of an ASCII character or\n\
-twice wider than that of an ASCII character depending on\n\
-the width (i.e. column numbers occupied on screen) of the character set\n\
-of the character.\n\
-\n\
-In the case that you only have too large size font for a specific\n\
-charscter set, and clipping characters of the character set makes them\n\
-almost unreadable, you can set this variable to t to see the\n\
-characters in exchage for garbage dots left on your screen.");
- Vclip_large_size_font = Qt;
-
- defsubr (&Squery_fontset);
- defsubr (&Snew_fontset);
- defsubr (&Sset_fontset_font);
- defsubr (&Sfont_info);
- defsubr (&Sfontset_info);
-}
+/* Fontset handler.
+ Copyright (C) 1995, 1997, 2000 Electrotechnical Laboratory, JAPAN.
+ Licensed to the Free Software Foundation.
+
+This file is part of GNU Emacs.
+
+GNU Emacs 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, or (at your option)
+any later version.
+
+GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* #define FONTSET_DEBUG */
+
+#include <config.h>
+
+#ifdef FONTSET_DEBUG
+#include <stdio.h>
+#endif
+
+#include "lisp.h"
+#include "buffer.h"
+#include "charset.h"
+#include "ccl.h"
+#include "keyboard.h"
+#include "frame.h"
+#include "dispextern.h"
+#include "fontset.h"
+#include "window.h"
+
+#ifdef FONTSET_DEBUG
+#undef xassert
+#define xassert(X) do {if (!(X)) abort ();} while (0)
+#undef INLINE
+#define INLINE
+#endif
+
+
+/* FONTSET
+
+ A fontset is a collection of font related information to give
+ similar appearance (style, size, etc) of characters. There are two
+ kinds of fontsets; base and realized. A base fontset is created by
+ new-fontset from Emacs Lisp explicitly. A realized fontset is
+ created implicitly when a face is realized for ASCII characters. A
+ face is also realized for multibyte characters based on an ASCII
+ face. All of the multibyte faces based on the same ASCII face
+ share the same realized fontset.
+
+ A fontset object is implemented by a char-table.
+
+ An element of a base fontset is:
+ (INDEX . FONTNAME) or
+ (INDEX . (FOUNDRY . REGISTRY ))
+ FONTNAME is a font name pattern for the corresponding character.
+ FOUNDRY and REGISTRY are respectively foundry and registry fields of
+ a font name for the corresponding character. INDEX specifies for
+ which character (or generic character) the element is defined. It
+ may be different from an index to access this element. For
+ instance, if a fontset defines some font for all characters of
+ charset `japanese-jisx0208', INDEX is the generic character of this
+ charset. REGISTRY is the
+
+ An element of a realized fontset is FACE-ID which is a face to use
+ for displaying the corresponding character.
+
+ All single byte characters (ASCII and 8bit-unibyte) share the same
+ element in a fontset. The element is stored in the first element
+ of the fontset.
+
+ To access or set each element, use macros FONTSET_REF and
+ FONTSET_SET respectively for efficiency.
+
+ A fontset has 3 extra slots.
+
+ The 1st slot is an ID number of the fontset.
+
+ The 2nd slot is a name of the fontset. This is nil for a realized
+ face.
+
+ The 3rd slot is a frame that the fontset belongs to. This is nil
+ for a default face.
+
+ A parent of a base fontset is nil. A parent of a realized fontset
+ is a base fontset.
+
+ All fontsets are recorded in Vfontset_table.
+
+
+ DEFAULT FONTSET
+
+ There's a special fontset named `default fontset' which defines a
+ default fontname pattern. When a base fontset doesn't specify a
+ font for a specific character, the corresponding value in the
+ default fontset is used. The format is the same as a base fontset.
+
+ The parent of a realized fontset created for such a face that has
+ no fontset is the default fontset.
+
+
+ These structures are hidden from the other codes than this file.
+ The other codes handle fontsets only by their ID numbers. They
+ usually use variable name `fontset' for IDs. But, in this file, we
+ always use variable name `id' for IDs, and name `fontset' for the
+ actual fontset objects.
+
+*/
+
+/********** VARIABLES and FUNCTION PROTOTYPES **********/
+
+extern Lisp_Object Qfont;
+Lisp_Object Qfontset;
+
+/* Vector containing all fontsets. */
+static Lisp_Object Vfontset_table;
+
+/* Next possibly free fontset ID. Usually this keeps the minimum
+ fontset ID not yet used. */
+static int next_fontset_id;
+
+/* The default fontset. This gives default FAMILY and REGISTRY of
+ font for each characters. */
+static Lisp_Object Vdefault_fontset;
+
+Lisp_Object Vfont_encoding_alist;
+Lisp_Object Vuse_default_ascent;
+Lisp_Object Vignore_relative_composition;
+Lisp_Object Valternate_fontname_alist;
+Lisp_Object Vfontset_alias_alist;
+Lisp_Object Vvertical_centering_font_regexp;
+
+/* The following six are declarations of callback functions depending
+ on window system. See the comments in src/fontset.h for more
+ detail. */
+
+/* Return a pointer to struct font_info of font FONT_IDX of frame F. */
+struct font_info *(*get_font_info_func) P_ ((FRAME_PTR f, int font_idx));
+
+/* Return a list of font names which matches PATTERN. See the documentation
+ of `x-list-fonts' for more details. */
+Lisp_Object (*list_fonts_func) P_ ((struct frame *f,
+ Lisp_Object pattern,
+ int size,
+ int maxnames));
+
+/* Load a font named NAME for frame F and return a pointer to the
+ information of the loaded font. If loading is failed, return 0. */
+struct font_info *(*load_font_func) P_ ((FRAME_PTR f, char *name, int));
+
+/* Return a pointer to struct font_info of a font named NAME for frame F. */
+struct font_info *(*query_font_func) P_ ((FRAME_PTR f, char *name));
+
+/* Additional function for setting fontset or changing fontset
+ contents of frame F. */
+void (*set_frame_fontset_func) P_ ((FRAME_PTR f, Lisp_Object arg,
+ Lisp_Object oldval));
+
+/* To find a CCL program, fs_load_font calls this function.
+ The argument is a pointer to the struct font_info.
+ This function set the member `encoder' of the structure. */
+void (*find_ccl_program_func) P_ ((struct font_info *));
+
+/* Check if any window system is used now. */
+void (*check_window_system_func) P_ ((void));
+
+
+/* Prototype declarations for static functions. */
+static Lisp_Object fontset_ref P_ ((Lisp_Object, int));
+static void fontset_set P_ ((Lisp_Object, int, Lisp_Object));
+static Lisp_Object make_fontset P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
+static int fontset_id_valid_p P_ ((int));
+static Lisp_Object fontset_pattern_regexp P_ ((Lisp_Object));
+static Lisp_Object font_family_registry P_ ((Lisp_Object, int));
+
+\f
+/********** MACROS AND FUNCTIONS TO HANDLE FONTSET **********/
+
+/* Return the fontset with ID. No check of ID's validness. */
+#define FONTSET_FROM_ID(id) AREF (Vfontset_table, id)
+
+/* Macros to access special values of FONTSET. */
+#define FONTSET_ID(fontset) XCHAR_TABLE (fontset)->extras[0]
+#define FONTSET_NAME(fontset) XCHAR_TABLE (fontset)->extras[1]
+#define FONTSET_FRAME(fontset) XCHAR_TABLE (fontset)->extras[2]
+#define FONTSET_ASCII(fontset) XCHAR_TABLE (fontset)->contents[0]
+#define FONTSET_BASE(fontset) XCHAR_TABLE (fontset)->parent
+
+#define BASE_FONTSET_P(fontset) NILP (FONTSET_BASE(fontset))
+
+
+/* Return the element of FONTSET (char-table) at index C (character). */
+
+#define FONTSET_REF(fontset, c) fontset_ref (fontset, c)
+
+static Lisp_Object
+fontset_ref (fontset, c)
+ Lisp_Object fontset;
+ int c;
+{
+ int charset, c1, c2;
+ Lisp_Object elt, defalt;
+
+ if (SINGLE_BYTE_CHAR_P (c))
+ return FONTSET_ASCII (fontset);
+
+ SPLIT_CHAR (c, charset, c1, c2);
+ elt = XCHAR_TABLE (fontset)->contents[charset + 128];
+ if (!SUB_CHAR_TABLE_P (elt))
+ return elt;
+ defalt = XCHAR_TABLE (elt)->defalt;
+ if (c1 < 32
+ || (elt = XCHAR_TABLE (elt)->contents[c1],
+ NILP (elt)))
+ return defalt;
+ if (!SUB_CHAR_TABLE_P (elt))
+ return elt;
+ defalt = XCHAR_TABLE (elt)->defalt;
+ if (c2 < 32
+ || (elt = XCHAR_TABLE (elt)->contents[c2],
+ NILP (elt)))
+ return defalt;
+ return elt;
+}
+
+
+#define FONTSET_REF_VIA_BASE(fontset, c) fontset_ref_via_base (fontset, &c)
+
+static Lisp_Object
+fontset_ref_via_base (fontset, c)
+ Lisp_Object fontset;
+ int *c;
+{
+ int charset, c1, c2;
+ Lisp_Object elt;
+
+ if (SINGLE_BYTE_CHAR_P (*c))
+ return FONTSET_ASCII (fontset);
+
+ elt = FONTSET_REF (FONTSET_BASE (fontset), *c);
+ if (NILP (elt) && ! EQ (fontset, Vdefault_fontset))
+ elt = FONTSET_REF (Vdefault_fontset, *c);
+ if (NILP (elt))
+ return Qnil;
+
+ *c = XINT (XCAR (elt));
+ SPLIT_CHAR (*c, charset, c1, c2);
+ elt = XCHAR_TABLE (fontset)->contents[charset + 128];
+ if (c1 < 32)
+ return (SUB_CHAR_TABLE_P (elt) ? XCHAR_TABLE (elt)->defalt : elt);
+ if (!SUB_CHAR_TABLE_P (elt))
+ return Qnil;
+ elt = XCHAR_TABLE (elt)->contents[c1];
+ if (c2 < 32)
+ return (SUB_CHAR_TABLE_P (elt) ? XCHAR_TABLE (elt)->defalt : elt);
+ if (!SUB_CHAR_TABLE_P (elt))
+ return Qnil;
+ elt = XCHAR_TABLE (elt)->contents[c2];
+ return elt;
+}
+
+
+/* Store into the element of FONTSET at index C the value NEWELT. */
+#define FONTSET_SET(fontset, c, newelt) fontset_set(fontset, c, newelt)
+
+static void
+fontset_set (fontset, c, newelt)
+ Lisp_Object fontset;
+ int c;
+ Lisp_Object newelt;
+{
+ int charset, code[3];
+ Lisp_Object *elt;
+ int i;
+
+ if (SINGLE_BYTE_CHAR_P (c))
+ {
+ FONTSET_ASCII (fontset) = newelt;
+ return;
+ }
+
+ SPLIT_CHAR (c, charset, code[0], code[1]);
+ code[2] = 0; /* anchor */
+ elt = &XCHAR_TABLE (fontset)->contents[charset + 128];
+ for (i = 0; code[i] > 0; i++)
+ {
+ if (!SUB_CHAR_TABLE_P (*elt))
+ *elt = make_sub_char_table (*elt);
+ elt = &XCHAR_TABLE (*elt)->contents[code[i]];
+ }
+ if (SUB_CHAR_TABLE_P (*elt))
+ XCHAR_TABLE (*elt)->defalt = newelt;
+ else
+ *elt = newelt;
+}
+
+
+/* Return a newly created fontset with NAME. If BASE is nil, make a
+ base fontset. Otherwise make a realized fontset whose parent is
+ BASE. */
+
+static Lisp_Object
+make_fontset (frame, name, base)
+ Lisp_Object frame, name, base;
+{
+ Lisp_Object fontset;
+ int size = ASIZE (Vfontset_table);
+ int id = next_fontset_id;
+
+ /* Find a free slot in Vfontset_table. Usually, next_fontset_id is
+ the next available fontset ID. So it is expected that this loop
+ terminates quickly. In addition, as the last element of
+ Vfontset_table is always nil, we don't have to check the range of
+ id. */
+ while (!NILP (AREF (Vfontset_table, id))) id++;
+
+ if (id + 1 == size)
+ {
+ Lisp_Object tem;
+ int i;
+
+ tem = Fmake_vector (make_number (size + 8), Qnil);
+ for (i = 0; i < size; i++)
+ AREF (tem, i) = AREF (Vfontset_table, i);
+ Vfontset_table = tem;
+ }
+
+ fontset = Fmake_char_table (Qfontset, Qnil);
+
+ FONTSET_ID (fontset) = make_number (id);
+ FONTSET_NAME (fontset) = name;
+ FONTSET_FRAME (fontset) = frame;
+ FONTSET_BASE (fontset) = base;
+
+ AREF (Vfontset_table, id) = fontset;
+ next_fontset_id = id + 1;
+ return fontset;
+}
+
+
+/* Return 1 if ID is a valid fontset id, else return 0. */
+
+static INLINE int
+fontset_id_valid_p (id)
+ int id;
+{
+ return (id >= 0 && id < ASIZE (Vfontset_table) - 1);
+}
+
+
+/* Extract `family' and `registry' string from FONTNAME and a cons of
+ them. Actually, `family' may also contain `foundry', `registry'
+ may also contain `encoding' of FONTNAME. But, if FONTNAME doesn't
+ conform to XLFD nor explicitely specifies the other fields
+ (i.e. not using wildcard `*'), return FONTNAME. If FORCE is
+ nonzero, specifications of the other fields are ignored, and return
+ a cons as far as FONTNAME conform to XLFD. */
+
+static Lisp_Object
+font_family_registry (fontname, force)
+ Lisp_Object fontname;
+ int force;
+{
+ Lisp_Object family, registry;
+ const char *p = SDATA (fontname);
+ const char *sep[15];
+ int i = 0;
+
+ while (*p && i < 15)
+ if (*p++ == '-')
+ {
+ if (!force && i >= 2 && i <= 11 && *p != '*' && p[1] != '-')
+ return fontname;
+ sep[i++] = p;
+ }
+ if (i != 14)
+ return fontname;
+
+ family = make_unibyte_string (sep[0], sep[2] - 1 - sep[0]);
+ registry = make_unibyte_string (sep[12], p - sep[12]);
+ return Fcons (family, registry);
+}
+
+\f
+/********** INTERFACES TO xfaces.c and dispextern.h **********/
+
+/* Return name of the fontset with ID. */
+
+Lisp_Object
+fontset_name (id)
+ int id;
+{
+ Lisp_Object fontset;
+ fontset = FONTSET_FROM_ID (id);
+ return FONTSET_NAME (fontset);
+}
+
+
+/* Return ASCII font name of the fontset with ID. */
+
+Lisp_Object
+fontset_ascii (id)
+ int id;
+{
+ Lisp_Object fontset, elt;
+ fontset= FONTSET_FROM_ID (id);
+ elt = FONTSET_ASCII (fontset);
+ return XCDR (elt);
+}
+
+
+/* Free fontset of FACE. Called from free_realized_face. */
+
+void
+free_face_fontset (f, face)
+ FRAME_PTR f;
+ struct face *face;
+{
+ if (fontset_id_valid_p (face->fontset))
+ {
+ AREF (Vfontset_table, face->fontset) = Qnil;
+ if (face->fontset < next_fontset_id)
+ next_fontset_id = face->fontset;
+ }
+}
+
+
+/* Return 1 iff FACE is suitable for displaying character C.
+ Otherwise return 0. Called from the macro FACE_SUITABLE_FOR_CHAR_P
+ when C is not a single byte character.. */
+
+int
+face_suitable_for_char_p (face, c)
+ struct face *face;
+ int c;
+{
+ Lisp_Object fontset, elt;
+
+ if (SINGLE_BYTE_CHAR_P (c))
+ return (face == face->ascii_face);
+
+ xassert (fontset_id_valid_p (face->fontset));
+ fontset = FONTSET_FROM_ID (face->fontset);
+ xassert (!BASE_FONTSET_P (fontset));
+
+ elt = FONTSET_REF_VIA_BASE (fontset, c);
+ return (!NILP (elt) && face->id == XFASTINT (elt));
+}
+
+
+/* Return ID of face suitable for displaying character C on frame F.
+ The selection of face is done based on the fontset of FACE. FACE
+ should already have been realized for ASCII characters. Called
+ from the macro FACE_FOR_CHAR when C is not a single byte character. */
+
+int
+face_for_char (f, face, c)
+ FRAME_PTR f;
+ struct face *face;
+ int c;
+{
+ Lisp_Object fontset, elt;
+ int face_id;
+
+ xassert (fontset_id_valid_p (face->fontset));
+ fontset = FONTSET_FROM_ID (face->fontset);
+ xassert (!BASE_FONTSET_P (fontset));
+
+ elt = FONTSET_REF_VIA_BASE (fontset, c);
+ if (!NILP (elt))
+ return XINT (elt);
+
+ /* No face is recorded for C in the fontset of FACE. Make a new
+ realized face for C that has the same fontset. */
+ face_id = lookup_face (f, face->lface, c, face);
+
+ /* Record the face ID in FONTSET at the same index as the
+ information in the base fontset. */
+ FONTSET_SET (fontset, c, make_number (face_id));
+ return face_id;
+}
+
+
+/* Make a realized fontset for ASCII face FACE on frame F from the
+ base fontset BASE_FONTSET_ID. If BASE_FONTSET_ID is -1, use the
+ default fontset as the base. Value is the id of the new fontset.
+ Called from realize_x_face. */
+
+int
+make_fontset_for_ascii_face (f, base_fontset_id)
+ FRAME_PTR f;
+ int base_fontset_id;
+{
+ Lisp_Object base_fontset, fontset, frame;
+
+ XSETFRAME (frame, f);
+ if (base_fontset_id >= 0)
+ {
+ base_fontset = FONTSET_FROM_ID (base_fontset_id);
+ if (!BASE_FONTSET_P (base_fontset))
+ base_fontset = FONTSET_BASE (base_fontset);
+ xassert (BASE_FONTSET_P (base_fontset));
+ }
+ else
+ base_fontset = Vdefault_fontset;
+
+ fontset = make_fontset (frame, Qnil, base_fontset);
+ return XINT (FONTSET_ID (fontset));
+}
+
+
+/* Return the font name pattern for C that is recorded in the fontset
+ with ID. If a font name pattern is specified (instead of a cons of
+ family and registry), check if a font can be opened by that pattern
+ to get the fullname. If a font is opened, return that name.
+ Otherwise, return nil. If ID is -1, or the fontset doesn't contain
+ information about C, get the registry and encoding of C from the
+ default fontset. Called from choose_face_font. */
+
+Lisp_Object
+fontset_font_pattern (f, id, c)
+ FRAME_PTR f;
+ int id, c;
+{
+ Lisp_Object fontset, elt;
+ struct font_info *fontp;
+
+ elt = Qnil;
+ if (fontset_id_valid_p (id))
+ {
+ fontset = FONTSET_FROM_ID (id);
+ xassert (!BASE_FONTSET_P (fontset));
+ fontset = FONTSET_BASE (fontset);
+ elt = FONTSET_REF (fontset, c);
+ }
+ if (NILP (elt))
+ elt = FONTSET_REF (Vdefault_fontset, c);
+
+ if (!CONSP (elt))
+ return Qnil;
+ if (CONSP (XCDR (elt)))
+ return XCDR (elt);
+
+ /* The fontset specifies only a font name pattern (not cons of
+ family and registry). If a font can be opened by that pattern,
+ return the name of opened font. Otherwise return nil. The
+ exception is a font for single byte characters. In that case, we
+ return a cons of FAMILY and REGISTRY extracted from the opened
+ font name. */
+ elt = XCDR (elt);
+ xassert (STRINGP (elt));
+ fontp = FS_LOAD_FONT (f, c, SDATA (elt), -1);
+ if (!fontp)
+ return Qnil;
+
+ return font_family_registry (build_string (fontp->full_name),
+ SINGLE_BYTE_CHAR_P (c));
+}
+
+
+#if defined(WINDOWSNT) && defined (_MSC_VER)
+#pragma optimize("", off)
+#endif
+
+/* Load a font named FONTNAME to display character C on frame F.
+ Return a pointer to the struct font_info of the loaded font. If
+ loading fails, return NULL. If FACE is non-zero and a fontset is
+ assigned to it, record FACE->id in the fontset for C. If FONTNAME
+ is NULL, the name is taken from the fontset of FACE or what
+ specified by ID. */
+
+struct font_info *
+fs_load_font (f, c, fontname, id, face)
+ FRAME_PTR f;
+ int c;
+ char *fontname;
+ int id;
+ struct face *face;
+{
+ Lisp_Object fontset;
+ Lisp_Object list, elt;
+ int size = 0;
+ struct font_info *fontp;
+ int charset = CHAR_CHARSET (c);
+
+ if (face)
+ id = face->fontset;
+ if (id < 0)
+ fontset = Qnil;
+ else
+ fontset = FONTSET_FROM_ID (id);
+
+ if (!NILP (fontset)
+ && !BASE_FONTSET_P (fontset))
+ {
+ elt = FONTSET_REF_VIA_BASE (fontset, c);
+ if (!NILP (elt))
+ {
+ /* A suitable face for C is already recorded, which means
+ that a proper font is already loaded. */
+ int face_id = XINT (elt);
+
+ xassert (face_id == face->id);
+ face = FACE_FROM_ID (f, face_id);
+ return (*get_font_info_func) (f, face->font_info_id);
+ }
+
+ if (!fontname && charset == CHARSET_ASCII)
+ {
+ elt = FONTSET_ASCII (fontset);
+ fontname = SDATA (XCDR (elt));
+ }
+ }
+
+ if (!fontname)
+ /* No way to get fontname. */
+ return 0;
+
+ fontp = (*load_font_func) (f, fontname, size);
+ if (!fontp)
+ return 0;
+
+ /* Fill in members (charset, vertical_centering, encoding, etc) of
+ font_info structure that are not set by (*load_font_func). */
+ fontp->charset = charset;
+
+ fontp->vertical_centering
+ = (STRINGP (Vvertical_centering_font_regexp)
+ && (fast_c_string_match_ignore_case
+ (Vvertical_centering_font_regexp, fontp->full_name) >= 0));
+
+ if (fontp->encoding[1] != FONT_ENCODING_NOT_DECIDED)
+ {
+ /* The font itself tells which code points to be used. Use this
+ encoding for all other charsets. */
+ int i;
+
+ fontp->encoding[0] = fontp->encoding[1];
+ for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
+ fontp->encoding[i] = fontp->encoding[1];
+ }
+ else
+ {
+ /* The font itself doesn't have information about encoding. */
+ int i;
+
+ fontname = fontp->full_name;
+ /* By default, encoding of ASCII chars is 0 (i.e. 0x00..0x7F),
+ others is 1 (i.e. 0x80..0xFF). */
+ fontp->encoding[0] = 0;
+ for (i = MIN_CHARSET_OFFICIAL_DIMENSION1; i <= MAX_CHARSET; i++)
+ fontp->encoding[i] = 1;
+ /* Then override them by a specification in Vfont_encoding_alist. */
+ for (list = Vfont_encoding_alist; CONSP (list); list = XCDR (list))
+ {
+ elt = XCAR (list);
+ if (CONSP (elt)
+ && STRINGP (XCAR (elt)) && CONSP (XCDR (elt))
+ && (fast_c_string_match_ignore_case (XCAR (elt), fontname)
+ >= 0))
+ {
+ Lisp_Object tmp;
+
+ for (tmp = XCDR (elt); CONSP (tmp); tmp = XCDR (tmp))
+ if (CONSP (XCAR (tmp))
+ && ((i = get_charset_id (XCAR (XCAR (tmp))))
+ >= 0)
+ && INTEGERP (XCDR (XCAR (tmp)))
+ && XFASTINT (XCDR (XCAR (tmp))) < 4)
+ fontp->encoding[i]
+ = XFASTINT (XCDR (XCAR (tmp)));
+ }
+ }
+ }
+
+ fontp->font_encoder = (struct ccl_program *) 0;
+
+ if (find_ccl_program_func)
+ (*find_ccl_program_func) (fontp);
+
+ /* If we loaded a font for a face that has fontset, record the face
+ ID in the fontset for C. */
+ if (face
+ && !NILP (fontset)
+ && !BASE_FONTSET_P (fontset))
+ FONTSET_SET (fontset, c, make_number (face->id));
+ return fontp;
+}
+
+#if defined(WINDOWSNT) && defined (_MSC_VER)
+#pragma optimize("", on)
+#endif
+
+\f
+/* Cache data used by fontset_pattern_regexp. The car part is a
+ pattern string containing at least one wild card, the cdr part is
+ the corresponding regular expression. */
+static Lisp_Object Vcached_fontset_data;
+
+#define CACHED_FONTSET_NAME (SDATA (XCAR (Vcached_fontset_data)))
+#define CACHED_FONTSET_REGEX (XCDR (Vcached_fontset_data))
+
+/* If fontset name PATTERN contains any wild card, return regular
+ expression corresponding to PATTERN. */
+
+static Lisp_Object
+fontset_pattern_regexp (pattern)
+ Lisp_Object pattern;
+{
+ if (!index (SDATA (pattern), '*')
+ && !index (SDATA (pattern), '?'))
+ /* PATTERN does not contain any wild cards. */
+ return Qnil;
+
+ if (!CONSP (Vcached_fontset_data)
+ || strcmp (SDATA (pattern), CACHED_FONTSET_NAME))
+ {
+ /* We must at first update the cached data. */
+ char *regex = (char *) alloca (SCHARS (pattern) * 2 + 3);
+ char *p0, *p1 = regex;
+
+ /* Convert "*" to ".*", "?" to ".". */
+ *p1++ = '^';
+ for (p0 = (char *) SDATA (pattern); *p0; p0++)
+ {
+ if (*p0 == '*')
+ {
+ *p1++ = '.';
+ *p1++ = '*';
+ }
+ else if (*p0 == '?')
+ *p1++ = '.';
+ else
+ *p1++ = *p0;
+ }
+ *p1++ = '$';
+ *p1++ = 0;
+
+ Vcached_fontset_data = Fcons (build_string (SDATA (pattern)),
+ build_string (regex));
+ }
+
+ return CACHED_FONTSET_REGEX;
+}
+
+/* Return ID of the base fontset named NAME. If there's no such
+ fontset, return -1. */
+
+int
+fs_query_fontset (name, regexpp)
+ Lisp_Object name;
+ int regexpp;
+{
+ Lisp_Object tem;
+ int i;
+
+ name = Fdowncase (name);
+ if (!regexpp)
+ {
+ tem = Frassoc (name, Vfontset_alias_alist);
+ if (CONSP (tem) && STRINGP (XCAR (tem)))
+ name = XCAR (tem);
+ else
+ {
+ tem = fontset_pattern_regexp (name);
+ if (STRINGP (tem))
+ {
+ name = tem;
+ regexpp = 1;
+ }
+ }
+ }
+
+ for (i = 0; i < ASIZE (Vfontset_table); i++)
+ {
+ Lisp_Object fontset;
+ const unsigned char *this_name;
+
+ fontset = FONTSET_FROM_ID (i);
+ if (NILP (fontset)
+ || !BASE_FONTSET_P (fontset))
+ continue;
+
+ this_name = SDATA (FONTSET_NAME (fontset));
+ if (regexpp
+ ? fast_c_string_match_ignore_case (name, this_name) >= 0
+ : !strcmp (SDATA (name), this_name))
+ return i;
+ }
+ return -1;
+}
+
+
+DEFUN ("query-fontset", Fquery_fontset, Squery_fontset, 1, 2, 0,
+ doc: /* Return the name of a fontset that matches PATTERN.
+The value is nil if there is no matching fontset.
+PATTERN can contain `*' or `?' as a wildcard
+just as X font name matching algorithm allows.
+If REGEXPP is non-nil, PATTERN is a regular expression. */)
+ (pattern, regexpp)
+ Lisp_Object pattern, regexpp;
+{
+ Lisp_Object fontset;
+ int id;
+
+ (*check_window_system_func) ();
+
+ CHECK_STRING (pattern);
+
+ if (SCHARS (pattern) == 0)
+ return Qnil;
+
+ id = fs_query_fontset (pattern, !NILP (regexpp));
+ if (id < 0)
+ return Qnil;
+
+ fontset = FONTSET_FROM_ID (id);
+ return FONTSET_NAME (fontset);
+}
+
+/* Return a list of base fontset names matching PATTERN on frame F.
+ If SIZE is not 0, it is the size (maximum bound width) of fontsets
+ to be listed. */
+
+Lisp_Object
+list_fontsets (f, pattern, size)
+ FRAME_PTR f;
+ Lisp_Object pattern;
+ int size;
+{
+ Lisp_Object frame, regexp, val;
+ int id;
+
+ XSETFRAME (frame, f);
+
+ regexp = fontset_pattern_regexp (pattern);
+ val = Qnil;
+
+ for (id = 0; id < ASIZE (Vfontset_table); id++)
+ {
+ Lisp_Object fontset;
+ const unsigned char *name;
+
+ fontset = FONTSET_FROM_ID (id);
+ if (NILP (fontset)
+ || !BASE_FONTSET_P (fontset)
+ || !EQ (frame, FONTSET_FRAME (fontset)))
+ continue;
+ name = SDATA (FONTSET_NAME (fontset));
+
+ if (!NILP (regexp)
+ ? (fast_c_string_match_ignore_case (regexp, name) < 0)
+ : strcmp (SDATA (pattern), name))
+ continue;
+
+ if (size)
+ {
+ struct font_info *fontp;
+ fontp = FS_LOAD_FONT (f, 0, NULL, id);
+ if (!fontp || size != fontp->size)
+ continue;
+ }
+ val = Fcons (Fcopy_sequence (FONTSET_NAME (fontset)), val);
+ }
+
+ return val;
+}
+
+DEFUN ("new-fontset", Fnew_fontset, Snew_fontset, 2, 2, 0,
+ doc: /* Create a new fontset NAME that contains font information in FONTLIST.
+FONTLIST is an alist of charsets vs corresponding font name patterns. */)
+ (name, fontlist)
+ Lisp_Object name, fontlist;
+{
+ Lisp_Object fontset, elements, ascii_font;
+ Lisp_Object tem, tail, elt;
+
+ (*check_window_system_func) ();
+
+ CHECK_STRING (name);
+ CHECK_LIST (fontlist);
+
+ name = Fdowncase (name);
+ tem = Fquery_fontset (name, Qnil);
+ if (!NILP (tem))
+ error ("Fontset `%s' matches the existing fontset `%s'",
+ SDATA (name), SDATA (tem));
+
+ /* Check the validity of FONTLIST while creating a template for
+ fontset elements. */
+ elements = ascii_font = Qnil;
+ for (tail = fontlist; CONSP (tail); tail = XCDR (tail))
+ {
+ int c, charset;
+
+ tem = XCAR (tail);
+ if (!CONSP (tem)
+ || (charset = get_charset_id (XCAR (tem))) < 0
+ || (!STRINGP (XCDR (tem)) && !CONSP (XCDR (tem))))
+ error ("Elements of fontlist must be a cons of charset and font name pattern");
+
+ tem = XCDR (tem);
+ if (STRINGP (tem))
+ tem = Fdowncase (tem);
+ else
+ tem = Fcons (Fdowncase (Fcar (tem)), Fdowncase (Fcdr (tem)));
+ if (charset == CHARSET_ASCII)
+ ascii_font = tem;
+ else
+ {
+ c = MAKE_CHAR (charset, 0, 0);
+ elements = Fcons (Fcons (make_number (c), tem), elements);
+ }
+ }
+
+ if (NILP (ascii_font))
+ error ("No ASCII font in the fontlist");
+
+ fontset = make_fontset (Qnil, name, Qnil);
+ FONTSET_ASCII (fontset) = Fcons (make_number (0), ascii_font);
+ for (; CONSP (elements); elements = XCDR (elements))
+ {
+ elt = XCAR (elements);
+ tem = XCDR (elt);
+ if (STRINGP (tem))
+ tem = font_family_registry (tem, 0);
+ tem = Fcons (XCAR (elt), tem);
+ FONTSET_SET (fontset, XINT (XCAR (elt)), tem);
+ }
+
+ return Qnil;
+}
+
+
+/* Clear all elements of FONTSET for multibyte characters. */
+
+static void
+clear_fontset_elements (fontset)
+ Lisp_Object fontset;
+{
+ int i;
+
+ for (i = CHAR_TABLE_SINGLE_BYTE_SLOTS; i < CHAR_TABLE_ORDINARY_SLOTS; i++)
+ XCHAR_TABLE (fontset)->contents[i] = Qnil;
+}
+
+
+/* Check validity of NAME as a fontset name and return the
+ corresponding fontset. If not valid, signal an error.
+ If NAME is t, return Vdefault_fontset. */
+
+static Lisp_Object
+check_fontset_name (name)
+ Lisp_Object name;
+{
+ int id;
+
+ if (EQ (name, Qt))
+ return Vdefault_fontset;
+
+ CHECK_STRING (name);
+ id = fs_query_fontset (name, 0);
+ if (id < 0)
+ error ("Fontset `%s' does not exist", SDATA (name));
+ return FONTSET_FROM_ID (id);
+}
+
+DEFUN ("set-fontset-font", Fset_fontset_font, Sset_fontset_font, 3, 4, 0,
+ doc: /* Modify fontset NAME to use FONTNAME for CHARACTER.
+
+CHARACTER may be a cons; (FROM . TO), where FROM and TO are
+non-generic characters. In that case, use FONTNAME
+for all characters in the range FROM and TO (inclusive).
+CHARACTER may be a charset. In that case, use FONTNAME
+for all character in the charsets.
+
+FONTNAME may be a cons; (FAMILY . REGISTRY), where FAMILY is a family
+name of a font, REGISTRY is a registry name of a font. */)
+ (name, character, fontname, frame)
+ Lisp_Object name, character, fontname, frame;
+{
+ Lisp_Object fontset, elt;
+ Lisp_Object realized;
+ int from, to;
+ int id;
+ Lisp_Object family, registry;
+
+ fontset = check_fontset_name (name);
+
+ if (CONSP (character))
+ {
+ /* CH should be (FROM . TO) where FROM and TO are non-generic
+ characters. */
+ CHECK_NUMBER_CAR (character);
+ CHECK_NUMBER_CDR (character);
+ from = XINT (XCAR (character));
+ to = XINT (XCDR (character));
+ if (!char_valid_p (from, 0) || !char_valid_p (to, 0))
+ error ("Character range should be by non-generic characters.");
+ if (!NILP (name)
+ && (SINGLE_BYTE_CHAR_P (from) || SINGLE_BYTE_CHAR_P (to)))
+ error ("Can't change font for a single byte character");
+ }
+ else if (SYMBOLP (character))
+ {
+ elt = Fget (character, Qcharset);
+ if (!VECTORP (elt) || ASIZE (elt) < 1 || !NATNUMP (AREF (elt, 0)))
+ error ("Invalid charset: %s", SDATA (SYMBOL_NAME (character)));
+ from = MAKE_CHAR (XINT (AREF (elt, 0)), 0, 0);
+ to = from;
+ }
+ else
+ {
+ CHECK_NUMBER (character);
+ from = XINT (character);
+ to = from;
+ }
+ if (!char_valid_p (from, 1))
+ invalid_character (from);
+ if (SINGLE_BYTE_CHAR_P (from))
+ error ("Can't change font for a single byte character");
+ if (from < to)
+ {
+ if (!char_valid_p (to, 1))
+ invalid_character (to);
+ if (SINGLE_BYTE_CHAR_P (to))
+ error ("Can't change font for a single byte character");
+ }
+
+ if (STRINGP (fontname))
+ {
+ fontname = Fdowncase (fontname);
+ elt = Fcons (make_number (from), font_family_registry (fontname, 0));
+ }
+ else
+ {
+ CHECK_CONS (fontname);
+ family = XCAR (fontname);
+ registry = XCDR (fontname);
+ if (!NILP (family))
+ {
+ CHECK_STRING (family);
+ family = Fdowncase (family);
+ }
+ if (!NILP (registry))
+ {
+ CHECK_STRING (registry);
+ registry = Fdowncase (registry);
+ }
+ elt = Fcons (make_number (from), Fcons (family, registry));
+ }
+
+ /* The arg FRAME is kept for backward compatibility. We only check
+ the validity. */
+ if (!NILP (frame))
+ CHECK_LIVE_FRAME (frame);
+
+ for (; from <= to; from++)
+ FONTSET_SET (fontset, from, elt);
+ Foptimize_char_table (fontset);
+
+ /* If there's a realized fontset REALIZED whose parent is FONTSET,
+ clear all the elements of REALIZED and free all multibyte faces
+ whose fontset is REALIZED. This way, the specified character(s)
+ are surely redisplayed by a correct font. */
+ for (id = 0; id < ASIZE (Vfontset_table); id++)
+ {
+ realized = AREF (Vfontset_table, id);
+ if (!NILP (realized)
+ && !BASE_FONTSET_P (realized)
+ && EQ (FONTSET_BASE (realized), fontset))
+ {
+ FRAME_PTR f = XFRAME (FONTSET_FRAME (realized));
+ clear_fontset_elements (realized);
+ free_realized_multibyte_face (f, id);
+ }
+ }
+
+ return Qnil;
+}
+
+DEFUN ("font-info", Ffont_info, Sfont_info, 1, 2, 0,
+ doc: /* Return information about a font named NAME on frame FRAME.
+If FRAME is omitted or nil, use the selected frame.
+The returned value is a vector of OPENED-NAME, FULL-NAME, CHARSET, SIZE,
+ HEIGHT, BASELINE-OFFSET, RELATIVE-COMPOSE, and DEFAULT-ASCENT,
+where
+ OPENED-NAME is the name used for opening the font,
+ FULL-NAME is the full name of the font,
+ SIZE is the maximum bound width of the font,
+ HEIGHT is the height of the font,
+ BASELINE-OFFSET is the upward offset pixels from ASCII baseline,
+ RELATIVE-COMPOSE and DEFAULT-ASCENT are the numbers controlling
+ how to compose characters.
+If the named font is not yet loaded, return nil. */)
+ (name, frame)
+ Lisp_Object name, frame;
+{
+ FRAME_PTR f;
+ struct font_info *fontp;
+ Lisp_Object info;
+
+ (*check_window_system_func) ();
+
+ CHECK_STRING (name);
+ name = Fdowncase (name);
+ if (NILP (frame))
+ frame = selected_frame;
+ CHECK_LIVE_FRAME (frame);
+ f = XFRAME (frame);
+
+ if (!query_font_func)
+ error ("Font query function is not supported");
+
+ fontp = (*query_font_func) (f, SDATA (name));
+ if (!fontp)
+ return Qnil;
+
+ info = Fmake_vector (make_number (7), Qnil);
+
+ XVECTOR (info)->contents[0] = build_string (fontp->name);
+ XVECTOR (info)->contents[1] = build_string (fontp->full_name);
+ XVECTOR (info)->contents[2] = make_number (fontp->size);
+ XVECTOR (info)->contents[3] = make_number (fontp->height);
+ XVECTOR (info)->contents[4] = make_number (fontp->baseline_offset);
+ XVECTOR (info)->contents[5] = make_number (fontp->relative_compose);
+ XVECTOR (info)->contents[6] = make_number (fontp->default_ascent);
+
+ return info;
+}
+
+
+/* Return the font name for the character at POSITION in the current
+ buffer. This is computed from all the text properties and overlays
+ that apply to POSITION. It returns nil in the following cases:
+
+ (1) The window system doesn't have a font for the character (thus
+ it is displayed by an empty box).
+
+ (2) The character code is invalid.
+
+ (3) The current buffer is not displayed in any window.
+
+ In addition, the returned font name may not take into account of
+ such redisplay engine hooks as what used in jit-lock-mode if
+ POSITION is currently not visible. */
+
+
+DEFUN ("internal-char-font", Finternal_char_font, Sinternal_char_font, 1, 1, 0,
+ doc: /* For internal use only. */)
+ (position)
+ Lisp_Object position;
+{
+ int pos, pos_byte, dummy;
+ int face_id;
+ int c;
+ Lisp_Object window;
+ struct window *w;
+ struct frame *f;
+ struct face *face;
+
+ CHECK_NUMBER_COERCE_MARKER (position);
+ pos = XINT (position);
+ if (pos < BEGV || pos >= ZV)
+ args_out_of_range_3 (position, make_number (BEGV), make_number (ZV));
+ pos_byte = CHAR_TO_BYTE (pos);
+ c = FETCH_CHAR (pos_byte);
+ if (! CHAR_VALID_P (c, 0))
+ return Qnil;
+ window = Fget_buffer_window (Fcurrent_buffer (), Qnil);
+ if (NILP (window))
+ return Qnil;
+ w = XWINDOW (window);
+ f = XFRAME (w->frame);
+ face_id = face_at_buffer_position (w, pos, -1, -1, &dummy, pos + 100, 0);
+ face_id = FACE_FOR_CHAR (f, FACE_FROM_ID (f, face_id), c);
+ face = FACE_FROM_ID (f, face_id);
+ return (face->font && face->font_name
+ ? build_string (face->font_name)
+ : Qnil);
+}
+
+
+/* Called from Ffontset_info via map_char_table on each leaf of
+ fontset. ARG is a list (LAST FONT-INFO ...), where LAST is `(last
+ ARG)' and FONT-INFOs have this form:
+ (CHAR FONT-SPEC) or ((FROM . TO) FONT-SPEC)
+ The current leaf is indexed by CHARACTER and has value ELT. This
+ function add the information of the current leaf to ARG by
+ appending a new element or modifying the last element.. */
+
+static void
+accumulate_font_info (arg, character, elt)
+ Lisp_Object arg, character, elt;
+{
+ Lisp_Object last, last_char, last_elt;
+
+ if (!CONSP (elt) && !SINGLE_BYTE_CHAR_P (XINT (character)))
+ elt = FONTSET_REF (Vdefault_fontset, XINT (character));
+ if (!CONSP (elt))
+ return;
+ last = XCAR (arg);
+ last_char = XCAR (XCAR (last));
+ last_elt = XCAR (XCDR (XCAR (last)));
+ elt = XCDR (elt);
+ if (!NILP (Fequal (elt, last_elt)))
+ {
+ int this_charset = CHAR_CHARSET (XINT (character));
+
+ if (CONSP (last_char)) /* LAST_CHAR == (FROM . TO) */
+ {
+ if (this_charset == CHAR_CHARSET (XINT (XCAR (last_char))))
+ {
+ XSETCDR (last_char, character);
+ return;
+ }
+ }
+ else if (XINT (last_char) == XINT (character))
+ return;
+ else if (this_charset == CHAR_CHARSET (XINT (last_char)))
+ {
+ XSETCAR (XCAR (last), Fcons (last_char, character));
+ return;
+ }
+ }
+ XSETCDR (last, Fcons (Fcons (character, Fcons (elt, Qnil)), Qnil));
+ XSETCAR (arg, XCDR (last));
+}
+
+
+DEFUN ("fontset-info", Ffontset_info, Sfontset_info, 1, 2, 0,
+ doc: /* Return information about a fontset named NAME on frame FRAME.
+The value is a vector:
+ [ SIZE HEIGHT ((CHARSET-OR-RANGE FONT-SPEC OPENED ...) ...) ],
+where,
+ SIZE is the maximum bound width of ASCII font in the fontset,
+ HEIGHT is the maximum bound height of ASCII font in the fontset,
+ CHARSET-OR-RANGE is a charset, a character (may be a generic character)
+ or a cons of two characters specifying the range of characters.
+ FONT-SPEC is a fontname pattern string or a cons (FAMILY . REGISTRY),
+ where FAMILY is a `FAMILY' field of a XLFD font name,
+ REGISTRY is a `CHARSET_REGISTRY' field of a XLFD font name.
+ FAMILY may contain a `FOUNDRY' field at the head.
+ REGISTRY may contain a `CHARSET_ENCODING' field at the tail.
+ OPENEDs are names of fonts actually opened.
+If the ASCII font is not yet opened, SIZE and HEIGHT are 0.
+If FRAME is omitted, it defaults to the currently selected frame. */)
+ (name, frame)
+ Lisp_Object name, frame;
+{
+ Lisp_Object fontset;
+ FRAME_PTR f;
+ Lisp_Object indices[3];
+ Lisp_Object val, tail, elt;
+ Lisp_Object *realized;
+ struct font_info *fontp = NULL;
+ int n_realized = 0;
+ int i;
+
+ (*check_window_system_func) ();
+
+ fontset = check_fontset_name (name);
+
+ if (NILP (frame))
+ frame = selected_frame;
+ CHECK_LIVE_FRAME (frame);
+ f = XFRAME (frame);
+
+ /* Recode realized fontsets whose base is FONTSET in the table
+ `realized'. */
+ realized = (Lisp_Object *) alloca (sizeof (Lisp_Object)
+ * ASIZE (Vfontset_table));
+ for (i = 0; i < ASIZE (Vfontset_table); i++)
+ {
+ elt = FONTSET_FROM_ID (i);
+ if (!NILP (elt)
+ && EQ (FONTSET_BASE (elt), fontset))
+ realized[n_realized++] = elt;
+ }
+
+ /* Accumulate information of the fontset in VAL. The format is
+ (LAST FONT-INFO FONT-INFO ...), where FONT-INFO is (CHAR-OR-RANGE
+ FONT-SPEC). See the comment for accumulate_font_info for the
+ detail. */
+ val = Fcons (Fcons (make_number (0),
+ Fcons (XCDR (FONTSET_ASCII (fontset)), Qnil)),
+ Qnil);
+ val = Fcons (val, val);
+ map_char_table (accumulate_font_info, Qnil, fontset, val, 0, indices);
+ val = XCDR (val);
+
+ /* For each FONT-INFO, if CHAR_OR_RANGE (car part) is a generic
+ character for a charset, replace it with the charset symbol. If
+ fonts are opened for FONT-SPEC, append the names of the fonts to
+ FONT-SPEC. */
+ for (tail = val; CONSP (tail); tail = XCDR (tail))
+ {
+ int c;
+ elt = XCAR (tail);
+ if (INTEGERP (XCAR (elt)))
+ {
+ int charset, c1, c2;
+ c = XINT (XCAR (elt));
+ SPLIT_CHAR (c, charset, c1, c2);
+ if (c1 == 0)
+ XSETCAR (elt, CHARSET_SYMBOL (charset));
+ }
+ else
+ c = XINT (XCAR (XCAR (elt)));
+ for (i = 0; i < n_realized; i++)
+ {
+ Lisp_Object face_id, font;
+ struct face *face;
+
+ face_id = FONTSET_REF_VIA_BASE (realized[i], c);
+ if (INTEGERP (face_id))
+ {
+ face = FACE_FROM_ID (f, XINT (face_id));
+ if (face && face->font && face->font_name)
+ {
+ font = build_string (face->font_name);
+ if (NILP (Fmember (font, XCDR (XCDR (elt)))))
+ XSETCDR (XCDR (elt), Fcons (font, XCDR (XCDR (elt))));
+ }
+ }
+ }
+ }
+
+ elt = Fcdr (Fcdr (Fassq (CHARSET_SYMBOL (CHARSET_ASCII), val)));
+ if (CONSP (elt))
+ {
+ elt = XCAR (elt);
+ fontp = (*query_font_func) (f, SDATA (elt));
+ }
+ val = Fmake_vector (make_number (3), val);
+ AREF (val, 0) = fontp ? make_number (fontp->size) : make_number (0);
+ AREF (val, 1) = fontp ? make_number (fontp->height) : make_number (0);
+ return val;
+}
+
+DEFUN ("fontset-font", Ffontset_font, Sfontset_font, 2, 2, 0,
+ doc: /* Return a font name pattern for character CH in fontset NAME.
+If NAME is t, find a font name pattern in the default fontset. */)
+ (name, ch)
+ Lisp_Object name, ch;
+{
+ int c;
+ Lisp_Object fontset, elt;
+
+ fontset = check_fontset_name (name);
+
+ CHECK_NUMBER (ch);
+ c = XINT (ch);
+ if (!char_valid_p (c, 1))
+ invalid_character (c);
+
+ elt = FONTSET_REF (fontset, c);
+ if (CONSP (elt))
+ elt = XCDR (elt);
+
+ return elt;
+}
+
+DEFUN ("fontset-list", Ffontset_list, Sfontset_list, 0, 0, 0,
+ doc: /* Return a list of all defined fontset names. */)
+ ()
+{
+ Lisp_Object fontset, list;
+ int i;
+
+ list = Qnil;
+ for (i = 0; i < ASIZE (Vfontset_table); i++)
+ {
+ fontset = FONTSET_FROM_ID (i);
+ if (!NILP (fontset)
+ && BASE_FONTSET_P (fontset))
+ list = Fcons (FONTSET_NAME (fontset), list);
+ }
+
+ return list;
+}
+
+void
+syms_of_fontset ()
+{
+ if (!load_font_func)
+ /* Window system initializer should have set proper functions. */
+ abort ();
+
+ Qfontset = intern ("fontset");
+ staticpro (&Qfontset);
+ Fput (Qfontset, Qchar_table_extra_slots, make_number (3));
+
+ Vcached_fontset_data = Qnil;
+ staticpro (&Vcached_fontset_data);
+
+ Vfontset_table = Fmake_vector (make_number (32), Qnil);
+ staticpro (&Vfontset_table);
+
+ Vdefault_fontset = Fmake_char_table (Qfontset, Qnil);
+ staticpro (&Vdefault_fontset);
+ FONTSET_ID (Vdefault_fontset) = make_number (0);
+ FONTSET_NAME (Vdefault_fontset)
+ = build_string ("-*-*-*-*-*-*-*-*-*-*-*-*-fontset-default");
+#if defined (MAC_OS)
+ FONTSET_ASCII (Vdefault_fontset)
+ = Fcons (make_number (0),
+ build_string ("-apple-monaco-medium-r-*--*-120-*-*-*-*-mac-roman"));
+#elif defined (WINDOWSNT)
+ FONTSET_ASCII (Vdefault_fontset)
+ = Fcons (make_number (0),
+ build_string ("-*-courier new-normal-r-*-*-*-100-*-*-*-*-iso8859-1"));
+#else
+ FONTSET_ASCII (Vdefault_fontset)
+ = Fcons (make_number (0),
+ build_string ("-adobe-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-1"));
+#endif
+ AREF (Vfontset_table, 0) = Vdefault_fontset;
+ next_fontset_id = 1;
+
+ DEFVAR_LISP ("font-encoding-alist", &Vfont_encoding_alist,
+ doc: /* Alist of fontname patterns vs corresponding encoding info.
+Each element looks like (REGEXP . ENCODING-INFO),
+ where ENCODING-INFO is an alist of CHARSET vs ENCODING.
+ENCODING is one of the following integer values:
+ 0: code points 0x20..0x7F or 0x2020..0x7F7F are used,
+ 1: code points 0xA0..0xFF or 0xA0A0..0xFFFF are used,
+ 2: code points 0x20A0..0x7FFF are used,
+ 3: code points 0xA020..0xFF7F are used. */);
+ Vfont_encoding_alist = Qnil;
+
+ DEFVAR_LISP ("use-default-ascent", &Vuse_default_ascent,
+ doc: /* Char table of characters whose ascent values should be ignored.
+If an entry for a character is non-nil, the ascent value of the glyph
+is assumed to be what specified by _MULE_DEFAULT_ASCENT property of a font.
+
+This affects how a composite character which contains
+such a character is displayed on screen. */);
+ Vuse_default_ascent = Qnil;
+
+ DEFVAR_LISP ("ignore-relative-composition", &Vignore_relative_composition,
+ doc: /* Char table of characters which is not composed relatively.
+If an entry for a character is non-nil, a composition sequence
+which contains that character is displayed so that
+the glyph of that character is put without considering
+an ascent and descent value of a previous character. */);
+ Vignore_relative_composition = Qnil;
+
+ DEFVAR_LISP ("alternate-fontname-alist", &Valternate_fontname_alist,
+ doc: /* Alist of fontname vs list of the alternate fontnames.
+When a specified font name is not found, the corresponding
+alternate fontnames (if any) are tried instead. */);
+ Valternate_fontname_alist = Qnil;
+
+ DEFVAR_LISP ("fontset-alias-alist", &Vfontset_alias_alist,
+ doc: /* Alist of fontset names vs the aliases. */);
+ Vfontset_alias_alist = Fcons (Fcons (FONTSET_NAME (Vdefault_fontset),
+ build_string ("fontset-default")),
+ Qnil);
+
+ DEFVAR_LISP ("vertical-centering-font-regexp",
+ &Vvertical_centering_font_regexp,
+ doc: /* *Regexp matching font names that require vertical centering on display.
+When a character is displayed with such fonts, the character is displayed
+at the vertical center of lines. */);
+ Vvertical_centering_font_regexp = Qnil;
+
+ defsubr (&Squery_fontset);
+ defsubr (&Snew_fontset);
+ defsubr (&Sset_fontset_font);
+ defsubr (&Sfont_info);
+ defsubr (&Sinternal_char_font);
+ defsubr (&Sfontset_info);
+ defsubr (&Sfontset_font);
+ defsubr (&Sfontset_list);
+}
HCoop / bpt / emacs.git / blobdiff