Created
November 29, 2016 23:03
-
-
Save saulpw/9c9f523d1b831c99844f3b9ca223ef23 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/python3 | |
| import curses | |
| def ctrl(ch): | |
| return ord(ch) & 31 # convert from 'a' to ^A keycode | |
| ENTER = ctrl('j') | |
| ESC = 27 | |
| def editText(scr, y, x, w, attr=None, prompt='', value='', fillchar=' ', unprintable='.'): | |
| def splice(v, i, s): # splices s into the string v at i (v[i] = s[0]) | |
| return v if i < 0 else v[:i] + s + v[i:] | |
| def clean(s): | |
| return ''.join(c if c.isprintable() else unprintable for c in s) | |
| def delchar(s, i, remove=1): | |
| return s[:i] + s[i+remove:] | |
| if prompt: | |
| scr.addstr(y, x, prompt) | |
| x += len(prompt) | |
| w -= len(prompt) | |
| v = value # value under edit | |
| i = 0 # index into v | |
| while True: | |
| dispval = clean(v) | |
| dispi = i | |
| if len(v) < w: | |
| dispval += fillchar*(w-len(v)) | |
| elif i >= w: | |
| dispi = w-1 | |
| dispval = dispval[i-w:] | |
| scr.addstr(y, x, dispval, attr) | |
| scr.move(y, x+dispi) | |
| ch = scr.getch() | |
| if ch == ctrl('a') or ch == curses.KEY_HOME: i = 0 | |
| elif ch == ctrl('b') or ch == curses.KEY_LEFT: i -= 1 | |
| elif ch == ctrl('c') or ch == ESC: return None | |
| elif ch == ctrl('d') or ch == curses.KEY_DC: v = delchar(v, i) | |
| elif ch == ctrl('e') or ch == curses.KEY_END: i = len(v) | |
| elif ch == ctrl('f') or ch == curses.KEY_RIGHT: i += 1 | |
| elif ch == ctrl('h') or ch == curses.KEY_BACKSPACE: i -= 1 if i > 0 else 0; v = delchar(v, i) | |
| elif ch == ctrl('j') or ch == ENTER: break | |
| elif ch == ctrl('k'): v = v[:i] | |
| elif ch == ctrl('r'): v = value | |
| elif ch == ctrl('t'): v = delchar(splice(v, i-2, v[i-1]), i) | |
| elif ch == ctrl('u'): v = v[i:]; i = 0 | |
| elif ch == ctrl('v'): v = splice(v, i, chr(scr.getch())); i+= 1 | |
| else: | |
| v = splice(v, i, chr(ch)) | |
| i += 1 | |
| if i < 0: i = 0 | |
| if i > len(v): i = len(v) | |
| return v | |
| def curses_main(scr): | |
| return editText(scr, 0, 10, 20, attr=curses.A_BOLD, prompt='text: ', value='default', fillchar='_') | |
| if __name__ == '__main__': | |
| print(curses.wrapper(curses_main)) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment