textpad.py 文件源码

def _insert_printable_char(self, ch):
        (y, x) = self.win.getyx()
        if y < self.maxy or x < self.maxx:
            if self.insert_mode:
                oldch = self.win.inch()
            # The try-catch ignores the error we trigger from some curses
            # versions by trying to write into the lowest-rightmost spot
            # in the window.
            try:
                self.win.addch(ch)
            except curses.error:
                pass
            if self.insert_mode:
                (backy, backx) = self.win.getyx()
                if curses.ascii.isprint(oldch):
                    self._insert_printable_char(oldch)
                    self.win.move(backy, backx)