pin_print/print.py

import argparse
import sys
import os
import six
from random import randint
from PIL import Image, ImageOps
import curses
import sys, termios, tty, os, time


class Printer():
    ESC = b'\x1B'
    CHANGE_EMULATION = ESC+b'\x7B'+b'\x65'
    LINE_FEED = b'\n'
    CARIDGE_RET = b'\x0D'
    CHARWIDTH = 78
    strokes = 0
    debug = True
    target = "/dev/usb/lp0"
    if debug:
        target = "/dev/tty"

    def printchar(self,char):
        with open(self.target, 'wb') as printer:
                    printer.write(self.ESC+b"\x7B"+b"\x41")
                    char=self.strokes*" "+char
                    printer.write(bytes(str(char), 'utf-8'))
                    printer.write(self.ESC+b"\x25"+b"\x46"+b"\x0F"+b"\x00"+b"\x04"+b"\x08"+b"\x00")
                    self.strokes += 1
                    if(self.strokes>self.CHARWIDTH):
                        printer.write(self.LINE_FEED)
                        self.strokes = 0

    def printstring(self,string):
        with open(self.target, 'wb') as printer:
            printer.write(self.ESC+b"\x7B"+b"\x41")
            printer.write(bytes(str(string), 'utf-8'))
            printer.write(self.ESC+b"\x25"+b"\x46"+b"\x0F"+b"\x00"+b"\x04"+b"\x08"+b"\x00")
            self.newline()


    def newline(self):
        global strokes
        with open(self.target, 'wb') as printer:
                    printer.write(self.LINE_FEED)
                    self.strokes = 0



class Terminal():
    lineinput = ""
    commandMode = False
    writeloop = True

    def __init__(self,printer):
        self.printer = printer

    def waitforinput(self):
        term.writeloop = True
        while self.writeloop:
            char = self.getch()
            self.lineinput+=char
            print(self.lineinput)
            if (ord(char) == 27):
                print("exit publication :-(")
                exit(0)
            if (ord(char) == 13):
                self.printer.newline()
                self.checkforcommand(self.lineinput)
                self.lineinput = ""
            else:
                print(char)
                self.printer.printchar(char)

    def getch(self):
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            ch = sys.stdin.read(1)

        finally:
            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        return ch

    def checkforcommand(self, command):
        print("received command:"+command)
        if command == "help":

        #if the command is valid we want to execute the command and continue the story
            #self.writeloop = False


printer = Printer()
term = Terminal(printer)
printer.printstring("W E L C O M E !")
printer.printstring("---------------")
printer.printstring("POETIC SOFTWARE")
printer.printstring("---------------")
printer.printstring("type help for help")
term.waitforinput()
printer.printstring("write a command")
term.waitforinput()