#! /usr/bin/env python

#
# Log file viewer for gDesklets.
#

from main import LOGFILE, ICON
from main import _
from utils.HIGDialog import HIGDialog
from utils.LogView import LogView

import gobject
import gtk
import os
import select


#
# Class for viewing log files.
#
class LogViewer(HIGDialog):

    def __init__(self, logfile):

        HIGDialog.__init__(self, buttons = (gtk.STOCK_CLOSE,
                                            gtk.RESPONSE_CLOSE))
        self.set_property("skip-taskbar-hint", False)
        self.set_title(_("Log Messages"))

        # set the icon
        self.set_icon(gtk.gdk.pixbuf_new_from_file(ICON))

        self.__logview = LogView()
        self.__logview.set_size_request(-1, 240)

        scrwin = gtk.ScrolledWindow()
        scrwin.set_policy(gtk.POLICY_NEVER, gtk.POLICY_AUTOMATIC)
        scrwin.add(self.__logview)

        align = gtk.Alignment(0.0, 0.0, 0.0, 0.0)
        align.set_border_width(6)
        align.add(scrwin)

        self.vbox.pack_start(align, False, False, 0)
        gobject.timeout_add(600, self.show_all)

        def stop(*args):
            gtk.main_quit()

        button = self.action_area.get_children()[-1]
        button.connect("clicked", stop)
        self.connect("destroy", stop)

        fd = open(logfile, "r")
        gobject.timeout_add(500, self.__read_log, fd)


    #
    # Reads the log in a non-blocking way.
    #
    def __read_log(self, fd):

        rs, ws, xs = select.select([fd], [], [], 0.01)
        if (rs):
            d = fd.read()
            if (d):
                self.__logview.append(d)
            
        return True
        


if (not os.path.exists(LOGFILE)):
    print "No log file available."

else:
    viewer = LogViewer(LOGFILE)
    gtk.main()