root/branches/gajim_0.11/src/gtkexcepthook.py

##      gtkexcepthook.py
##
## Copyright (C) 2005-2006 Yann Le Boulanger <asterix@lagaule.org>
## Copyright (C) 2005-2006 Nikos Kouremenos <kourem@gmail.com>
##
## Initially written and submitted by Gustavo J. A. M. Carneiro
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 2 only.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##

import sys
import os
import traceback
import threading

import gtk
import pango
from common import i18n
import dialogs

from cStringIO import StringIO
from common import helpers

_exception_in_progress = threading.Lock()

def _info(type, value, tb):
        if not _exception_in_progress.acquire(False):
                # Exceptions have piled up, so we use the default exception
                # handler for such exceptions
                _excepthook_save(type, value, tb)
                return

        dialog = dialogs.HigDialog(None, gtk.MESSAGE_WARNING, gtk.BUTTONS_NONE, 
                                _('A programming error has been detected'),
                                _('It probably is not fatal, but should be reported '
                                'to the developers nonetheless.'))
        
        #FIXME: add icon to this button
        RESPONSE_REPORT_BUG = 42
        dialog.add_buttons(gtk.STOCK_CLOSE, gtk.BUTTONS_CLOSE,
                _('_Report Bug'), RESPONSE_REPORT_BUG)
        dialog.set_default_response(RESPONSE_REPORT_BUG)
        report_button = dialog.action_area.get_children()[0] # right to left
        report_button.grab_focus()

        # Details
        textview = gtk.TextView()
        textview.set_editable(False)
        textview.modify_font(pango.FontDescription('Monospace'))
        sw = gtk.ScrolledWindow()
        sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
        sw.add(textview)
        frame = gtk.Frame()
        frame.set_shadow_type(gtk.SHADOW_IN)
        frame.add(sw)
        frame.set_border_width(6)
        textbuffer = textview.get_buffer()
        trace = StringIO()
        traceback.print_exception(type, value, tb, None, trace)
        textbuffer.set_text(trace.getvalue())
        textview.set_size_request(
                gtk.gdk.screen_width() / 3,
                gtk.gdk.screen_height() / 4)
        expander = gtk.Expander(_('Details'))
        expander.add(frame)
        dialog.vbox.add(expander)

        dialog.set_resizable(True)
        # on expand the details the dialog remains centered on screen
        dialog.set_position(gtk.WIN_POS_CENTER_ALWAYS)

        dialog.show_all()

        close_clicked = False
        while not close_clicked:
                resp = dialog.run()
                if resp == RESPONSE_REPORT_BUG:
                        url = 'http://trac.gajim.org/wiki/WikiStart#howto_report_ticket'
                        helpers.launch_browser_mailer('url', url)
                else:
                        close_clicked = True
        
        dialog.destroy()

        _exception_in_progress.release()
        
# gdb/kdm etc if we use startx this is not True
if os.name == 'nt' or not sys.stderr.isatty():
        #FIXME: maybe always show dialog?
        _excepthook_save = sys.excepthook
        sys.excepthook = _info

# this is just to assist testing (python gtkexcepthook.py)
if __name__ == '__main__':
        _excepthook_save = sys.excepthook
        sys.excepthook = _info
        print x # this always tracebacks