nboard/nboard

#!/usr/bin/env python3


import curses,time,json,sys

dataPath = '/home/xfnw/nboard/nboard.json'

allowedChars = " `~1234567890-=!@#$%^&*()_+qwertyuiop[]\\QWERTYUIOP{}|asdfghjkl;'ASDFGHJKL:\"zxcvbnm,./ZXCVBNM<>?"
data = {}

def main(stdscr):
    stdscr.erase()
    stdscr.refresh()
    k='NOU'
    height, width = stdscr.getmaxyx()
    vx = vy = tx = ty = nl = 0

    cx = width // 2
    cy = height // 2

    stdscr.move(cy,cx)
    while True:
        cx = width // 2
        cy = height // 2

        stdscr.clear()

        height, width = stdscr.getmaxyx()

        if k == '\x1b':
            k=""
            for i in range(5):
                k += stdscr.getkey()

        # detect where to move cursor
        if k == 'KEY_UP':
            vy += -1
            nl = vx
        if k == 'KEY_DOWN':
            vy += 1
            nl = vx
        if k == 'KEY_LEFT':
            vx += -1
            nl = vx
        if k == 'KEY_RIGHT':
            vx += 1
            nl = vx

        if k == '[1;5A' or k == 'kUP5':
            vy += 0-(height//2)
            nl = vx
        if k == '[1;5B' or k == 'kDN5':
            vy += height//2
            nl = vx
        if k == '[1;5D' or k == 'kLFT5':
            vx += 0-(width//2)
            nl = vx
        if k == '[1;5C' or k == 'kRIT5':
            vx += width//2
            nl = vx

        if k == '\n':
            vx = nl
            vy += 1
        if k == 'KEY_BACKSPACE' or k == '\x7f':
            vx += -1

        # make sure the cursor is on the screen
        # this is not nessesary for the view as it is infinite
        cx = max(0, cx)
        cx = min(width-1, cx)

        cy = max(0, cy)
        cy = min(height-2, cy)

        # calculate true position
        tx = cx + (vx) - width // 2
        ty = cy + (vy) - (height-1) // 2

        # get json data
        with open(dataPath, 'r') as openfile:
            data = json.load(openfile)
        
        # if valid key pressed, write it
        if k in allowedChars:
            data[str((ty,tx))] = k
            vx = vx+1
            time.sleep(0)
            with open(dataPath, 'w') as outfile:
                json.dump(data, outfile)
            tx = cx + (vx) - width // 2

        # draw the screen
        stdscr.move(0, 0)
        for y in range(height-1):
            for x in range(width):
                stdscr.move(y,x)
                stdscr.addstr(data.get(str((ty - cy + y,tx - cx + x)), ' '))


        # display some info
        stdscr.addstr(height-1, 0, 'x: {}, y: {}, arrow keys to move, ctrl to go faster'.format(tx, 1-ty)[:width-1]) 


        # move the cursor where its actually supposed to be
        stdscr.move(cy,cx)

        #print(str(k)) # debug keycodes

        k = stdscr.getkey()
        time.sleep(0)


if __name__ == "__main__":
    if len(sys.argv) > 1 and (sys.argv[1] == '--help' or sys.argv[1] == 'help'):
        print("""
nboard is like yourworldoftext.com, except its in a terminal.

use the arrow keys to move arount
once you are in the place you want, you can start typing!

hold ctrl while pressing the arrow keys to go faster

please report any bugs to ~xfnw on IRC, anywhere you can find him, or
on the tildegit page, https://tildegit.org/xfnw/nboard
""")
    else:
        try:
            curses.wrapper(main)
        except KeyboardInterrupt:
            print('bye!')