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#!/usr/bin/python
import curses
import os
import sys
import StringIO
from subprocess import *
import subprocess
# our screen
screen = curses.initscr()
curses.noecho()
curses.cbreak()
curses.curs_set(0)
curses.start_color()
screen.keypad(True);
# default entry color
curses.init_pair(1, curses.COLOR_WHITE, curses.COLOR_CYAN)
# default error color
curses.init_pair(4, curses.COLOR_WHITE, curses.COLOR_RED)
# current entry color
curses.init_pair(3, curses.COLOR_WHITE, curses.COLOR_BLUE)
# line number color, invert of entry
curses.init_pair(2, curses.COLOR_CYAN, curses.COLOR_WHITE)
# our stdin input
input_buffer = ""
# rows and columns of our screen
cols = int(subprocess.check_output(["tput", "cols"]))
rows = int(subprocess.check_output(["tput", "lines"]))
def call_process(process, pipe, stdin):
process = Popen(["sed", pipe], stdout=PIPE, stdin=PIPE, stderr=PIPE)
ret = process.communicate(stdin)
if(process.returncode is not 0):
return (ret[1], 1)
else:
return (ret[0], 0)
return
def call_pipes(a, pipe_array):
# start first one with input buffer
ret = call_process("sed", pipe_array[0], input_buffer)
if(len(pipe_array) == 1):
if(ret[1] != 0):
error = "Error on line 0:" + ret[0][:-1]
screen.addstr(error.ljust(cols), curses.color_pair(4));
else:
screen.addstr(ret[0])
return
p = ret[0];
for i in range(1, len(pipe_array)):
ret = call_process("sed", pipe_array[i], p);
if(ret[1] != 0):
error = "Error on line " + str(i) + ":" + ret[0][:-1]
screen.addstr(error.ljust(cols), curses.color_pair(4));
else:
p = ret[0];
screen.addstr(p)
def update(pipe_array, current_pipe):
draw_pipes(pipe_array, current_pipe)
call_pipes("sed", pipe_array)
screen.addstr("EOF")
def draw_pipes(pipe_array, current_pipe):
for pipe, num in map(None, pipe_array, range(0, len(pipe_array))):
color = 1
if(num == current_pipe):
color = 3
screen.addstr(num, 0, str(num), curses.color_pair(2))
screen.addstr(num, len(str(num)), " " + pipe.ljust(cols - len(str(num)) - 1), curses.color_pair(color))
def main(argv):
pipe_array = [];
command_array = [];
enable_array = [];
pipe_array.append("");
current_pipe = 0;
global input_buffer
try:
input_fh = open(argv[1], "r")
for line in input_fh:
input_buffer = input_buffer + line
except:
curses.endwin()
sys.exit("please specify a file")
# init our screen
screen.addstr("".ljust(cols), curses.color_pair(1));
screen.addstr(input_buffer)
screen.addstr("EOF")
try:
while 1:
key = screen.getch()
screen.clear()
screen.addstr(rows - 1, 0, str(key) + " " + str(current_pipe))
# UP
if(key == 259):
if(current_pipe is not 0):
current_pipe = current_pipe - 1;
update(pipe_array, current_pipe)
continue;
# DOWN
if(key == 258):
if(current_pipe == len(pipe_array) -1):
pipe_array.append("");
current_pipe = current_pipe + 1;
update(pipe_array, current_pipe);
continue;
# BACKSPACE
if(key == 263):
if(len(pipe_array[current_pipe]) is not 0):
pipe_array[current_pipe] = pipe_array[current_pipe][:-1]
else:
if(current_pipe is not 0):
del pipe_array[current_pipe]
current_pipe = current_pipe - 1
draw_pipes(pipe_array, current_pipe)
screen.addstr(input_buffer)
screen.addstr("EOF")
continue;
# ENTER
else:
if(key < 256):
pipe_array[current_pipe]+=chr(key)
update(pipe_array, current_pipe);
finally:
curses.endwin()
if __name__ == "__main__":
sys.exit(main(sys.argv))
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