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"""Very partial replacement of the standard extension module '_curses'.
Just contains the minimal amount of stuff to make one of my curses
programs run. XXX should also check for and report errors.
"""
from cffi import FFI
ffi = FFI()
ffi.cdef("""
typedef ... WINDOW;
typedef unsigned char bool;
typedef unsigned long chtype;
static const int ERR, OK;
WINDOW *initscr(void);
int endwin(void);
bool isendwin(void);
const char *keyname(int c);
static const int KEY_MIN, KEY_MAX;
int setupterm(char *term, int fildes, int *errret);
int tigetflag(char *);
int tigetnum(char *);
char *tigetstr(char *);
char *tparm (const char *, ...);
int cbreak(void);
int nocbreak(void);
int echo(void);
int noecho(void);
int keypad(WINDOW *win, bool bf);
int notimeout(WINDOW *win, bool bf);
void wtimeout(WINDOW *win, int delay);
int def_prog_mode(void);
int def_shell_mode(void);
int reset_prog_mode(void);
int reset_shell_mode(void);
int resetty(void);
int savetty(void);
void getsyx(int y, int x);
void setsyx(int y, int x);
//int ripoffline(int line, int (*init)(WINDOW *, int));
int curs_set(int visibility);
int napms(int ms);
int start_color(void);
int init_pair(short pair, short f, short b);
int init_color(short color, short r, short g, short b);
bool has_colors(void);
bool can_change_color(void);
int color_content(short color, short *r, short *g, short *b);
int pair_content(short pair, short *f, short *b);
int use_default_colors(void);
static const int COLOR_BLACK;
static const int COLOR_RED;
static const int COLOR_GREEN;
static const int COLOR_YELLOW;
static const int COLOR_BLUE;
static const int COLOR_MAGENTA;
static const int COLOR_CYAN;
static const int COLOR_WHITE;
static const int A_ATTRIBUTES;
static const int A_NORMAL;
static const int A_STANDOUT;
static const int A_UNDERLINE;
static const int A_REVERSE;
static const int A_BLINK;
static const int A_DIM;
static const int A_BOLD;
static const int A_ALTCHARSET;
static const int A_INVIS;
static const int A_PROTECT;
static const int A_CHARTEXT;
static const int A_COLOR;
int COLORS, COLOR_PAIRS;
void _m_getyx(WINDOW *win, int yx[2]);
void _m_getparyx(WINDOW *win, int yx[2]);
void _m_getbegyx(WINDOW *win, int yx[2]);
void _m_getmaxyx(WINDOW *win, int yx[2]);
int wclear(WINDOW *win);
int wclrtoeol(WINDOW *win);
int wmove(WINDOW *win, int y, int x);
int waddstr(WINDOW *win, const char *str);
int mvwaddstr(WINDOW *win, int y, int x, const char *str);
void wbkgdset(WINDOW *win, chtype ch);
int wrefresh(WINDOW *win);
int wgetch(WINDOW *win);
int getattrs(WINDOW *win);
int wattrset(WINDOW *win, int attrs);
""")
lib = ffi.verify("""
#include <ncurses.h>
#include <term.h>
void _m_getyx(WINDOW *win, int yx[2]) {
getyx(win, yx[0], yx[1]);
}
void _m_getparyx(WINDOW *win, int yx[2]) {
getparyx(win, yx[0], yx[1]);
}
void _m_getbegyx(WINDOW *win, int yx[2]) {
getbegyx(win, yx[0], yx[1]);
}
void _m_getmaxyx(WINDOW *win, int yx[2]) {
getmaxyx(win, yx[0], yx[1]);
}
""",
libraries=['ncurses'])
def _setup():
globals().update(lib.__dict__)
for key in range(KEY_MIN, KEY_MAX):
key_n = keyname(key)
if key_n == ffi.NULL or ffi.string(key_n) == "UNKNOWN KEY":
continue
key_n = ffi.string(key_n).replace('(', '').replace(')', '')
globals()[key_n] = key
_setup()
# ____________________________________________________________
class error(Exception):
pass
class Window(object):
def __init__(self):
self._window = lib.initscr()
def getyx(self):
yx = ffi.new("int[2]")
lib._m_getyx(self._window, yx)
return tuple(yx)
def getparyx(self):
yx = ffi.new("int[2]")
lib._m_getparyx(self._window, yx)
return tuple(yx)
def getbegyx(self):
yx = ffi.new("int[2]")
lib._m_getbegyx(self._window, yx)
return tuple(yx)
def getmaxyx(self):
yx = ffi.new("int[2]")
lib._m_getmaxyx(self._window, yx)
return tuple(yx)
def addstr(self, *args):
y = None
attr = None
if len(args) == 1:
text, = args
elif len(args) == 2:
text, attr = args
elif len(args) == 3:
y, x, text = args
elif len(args) == 4:
y, x, text, attr = args
else:
raise TypeError("addstr requires 1 to 4 arguments")
if attr is not None:
attr_old = getattrs(self._window)
wattrset(self._window, attr)
if y is not None:
mvwaddstr(self._window, y, x, text)
else:
waddstr(self._window, text)
if attr is not None:
wattrset(self._window, attr_old)
def bkgdset(self, bkgd, attr=A_NORMAL):
if isinstance(bkgd, str):
bkgd = ord(bkgd)
wbkgdset(self._window, bkgd | attr)
def _make_method(cname):
method = getattr(lib, cname)
def _execute(self, *args):
return method(self._window, *args)
return _execute
keypad = _make_method('keypad')
clear = _make_method('wclear')
clrtoeol = _make_method('wclrtoeol')
move = _make_method('wmove')
refresh = _make_method('wrefresh')
getch = _make_method('wgetch')
notimeout = _make_method('notimeout')
timeout = _make_method('wtimeout')
del _make_method
initscr = Window
_setupterm_called = False
def _ensure_setupterm_called():
if not _setupterm_called:
raise error("must call (at least) setupterm() first")
def setupterm(term=None, fd=-1):
if term is None:
term = ffi.NULL
if fd < 0:
import sys
fd = sys.stdout.fileno()
err = ffi.new("int *")
if lib.setupterm(term, fd, err) == ERR:
if err[0] == 0:
s = "setupterm: could not find terminal"
elif err[0] == 1:
s = "setupterm: could not find terminfo database"
else:
s = "setupterm: unknown error %d" % err[0]
raise error(s)
global _setupterm_called
_setupterm_called = True
def tigetflag(capname):
_ensure_setupterm_called()
return lib.tigetflag(capname)
def tigetnum(capname):
_ensure_setupterm_called()
return lib.tigetnum(capname)
def tigetstr(capname):
_ensure_setupterm_called()
out = lib.tigetstr(capname)
if out == ffi.NULL:
return None
return ffi.string(out)
def tparm(name, *args):
_ensure_setupterm_called()
cargs = [ffi.cast("long", arg) for arg in args]
return ffi.string(lib.tparm(name, *cargs))
def color_pair(n):
return n << 8
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