Source

cffi / demo / _curses.py

Armin Rigo ea5496b 


















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Armin Rigo ea5496b 



Jeremy Thurgood 9793a0c 




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Armin Rigo ea5496b 
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Jeremy Thurgood 9793a0c 
Armin Rigo ea5496b 
Jeremy Thurgood 9793a0c 








Armin Rigo ea5496b 


Armin Rigo dd5af0e 
Armin Rigo ea5496b 







Jeremy Thurgood 9793a0c 


























Armin Rigo ea5496b 

"""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 (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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