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DEFUN ("x-list-fonts", Fx_list_fonts, Sx_list_fonts, 1, 5, 0,
"Return a list of the names of available fonts matching PATTERN.\n\
If optional arguments FACE and FRAME are specified, return only fonts\n\
the same size as FACE on FRAME.\n\
PATTERN is a string, perhaps with wildcard characters;\n\
the * character matches any substring, and\n\
the ? character matches any single character.\n\
PATTERN is case-insensitive.\n\
FACE is a face name--a symbol.\n\
\n\
The return value is a list of strings, suitable as arguments to\n\
set-face-font.\n\
\n\
Fonts Emacs can't use (i.e. proportional fonts) may or may not be excluded\n\
even if they match PATTERN and FACE.\n\
The optional fourth argument MAXIMUM sets a limit on how many\n\
fonts to match. The first MAXIMUM fonts are reported.\n\
The optional fifth argument WIDTH, if specified, is a number of columns\n\
occupied by a character of a font. In that case, return only fonts\n\
the WIDTH times as wide as FACE on FRAME.")
(pattern, face, frame, maximum, width)
Lisp_Object pattern, face, frame, maximum, width;
{
FRAME_PTR f;
int size, cols;
int maxnames;
(*check_window_system_func) ();
CHECK_STRING (pattern, 0);
if (!NILP (face))
CHECK_SYMBOL (face, 1);
if (NILP (maximum))
maxnames = 2000;
else
{
CHECK_NATNUM (maximum, 0);
maxnames = XINT (maximum);
}
if (!NILP (width))
CHECK_NUMBER (width, 4);
/* We can't simply call check_x_frame because this function may be
called before any frame is created. */
if (NILP (frame))
f = selected_frame;
else
{
CHECK_LIVE_FRAME (frame, 0);
f = XFRAME (frame);
}
if (! FRAME_WINDOW_P (f))
{
/* Perhaps we have not yet created any frame. */
f = NULL;
face = Qnil;
}
/* Determine the width standard for comparison with the fonts we find. */
if (NILP (face))
size = 0;
else
{
int face_id;
face_id = face_name_id_number (f, face);
if (face_id < 0 || face_id >= FRAME_N_PARAM_FACES (f)
|| FRAME_PARAM_FACES (f) [face_id] == 0
|| FRAME_PARAM_FACES (f) [face_id]->font == (XFontStruct *) (~0))
size = FONT_WIDTH (FRAME_FONT (f));
else
size = FONT_WIDTH (FRAME_PARAM_FACES (f) [face_id]->font);
if (!NILP (width))
size *= XINT (width);
}
{
Lisp_Object args[2];
args[0] = (*list_fonts_func) (f, pattern, size, maxnames);
if (f == NULL)
/* We don't have to check fontsets. */
return args[0];
args[1] = list_fontsets (f, pattern, size);
return Fnconc (2, args);
}
}
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