# FILE:     autoload/conque_term/conque_sole_communicator.py {{{
# AUTHOR:   Nico Raffo <nicoraffo@gmail.com>
# WEBSITE:  http://conque.googlecode.com
# MODIFIED: 2010-11-15
# VERSION:  2.0, for Vim 7.0
# LICENSE:
# Conque - Vim terminal/console emulator
# Copyright (C) 2009-2010 Nico Raffo
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE. }}}

"""
ConqueSoleCommunicator

Script to transfer communications between python being run in Vim and a
subprocess run inside a Windows console. This is required since interactive
programs in Windows appear to require a console, and python run in Vim is
not attached to any console. So a console version of python must be initiated
for the subprocess. Communication is then done with the use of shared memory
objects. Good times!
"""

import time
import sys

from conque_globals import *
from conque_win32_util import *
from conque_sole_subprocess import *
from conque_sole_shared_memory import *

##############################################################
# only run if this file was run directly

if __name__ == '__main__':

    # attempt to catch ALL exceptions to fend of zombies
    try:

        # startup and config {{{

        # simple arg validation

        if len(sys.argv) < 5:

            exit()

        # shared memory size
        CONQUE_SOLE_COMMANDS_SIZE = 255

        # maximum time this thing reads. 0 means no limit. Only for testing.
        max_loops = 0

        # read interval, in seconds
        sleep_time = 0.01

        # idle read interval, in seconds
        idle_sleep_time = 0.10

        # are we idled?
        is_idle = False

        # mem key
        mem_key = sys.argv[1]

        # console width
        console_width = int(sys.argv[2])

        # console height
        console_height = int(sys.argv[3])

        # the actual subprocess to run
        cmd_line = " ".join(sys.argv[4:])


        # width and height
        options = {'LINES': console_height, 'COLUMNS': console_width}



        # set initial idle status
        shm_command = ConqueSoleSharedMemory(CONQUE_SOLE_COMMANDS_SIZE, 'command', mem_key, serialize=True)
        shm_command.create('write')

        cmd = shm_command.read()
        if cmd:

            if cmd['cmd'] == 'idle':
                is_idle = True
                shm_command.clear()

        # }}}

        ##############################################################
        # Create the subprocess

        # {{{
        proc = ConqueSoleSubprocess()
        res = proc.open(cmd_line, mem_key, options)

        if not res:

            exit()

        # }}}

        ##############################################################
        # main loop!

        loops = 0

        while True:

            # check for idle/resume
            if is_idle or loops % 25 == 0:

                # check process health
                if not proc.is_alive():

                    proc.close()
                    exit()

                # check for change in buffer focus
                cmd = shm_command.read()
                if cmd:

                    if cmd['cmd'] == 'idle':
                        is_idle = True
                        shm_command.clear()

                    elif cmd['cmd'] == 'resume':
                        is_idle = False
                        shm_command.clear()


            # sleep between loops if moderation is requested
            if sleep_time > 0:
                if is_idle:
                    time.sleep(idle_sleep_time)
                else:
                    time.sleep(sleep_time)

            # write, read, etc
            proc.write()
            proc.read()

            # increment loops, and exit if max has been reached
            loops += 1
            if max_loops and loops >= max_loops:

                break

        ##############################################################
        # all done!



        proc.close()

    # if an exception was thrown, croak
    except:

        proc.close()


# vim:foldmethod=marker