~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005 Canonical Ltd

# 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; either version 2 of the License, or

# (at your option) any later version.

# 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.

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""UI abstraction.

This tells the library how to display things to the user.  Through this

layer different applications can choose the style of UI.

At the moment this layer is almost trivial: the application can just

choose the style of progress bar.

Set the ui_factory member to define the behaviour.  The default

displays no output.

"""

import bzrlib.progress

class TextUIFactory(object):

    def progress_bar(self):

        # this in turn is abstract, and creates either a tty or dots

        # bar depending on what we think of the terminal

        return bzrlib.progress.ProgressBar()

class SilentUIFactory(object):

    def progress_bar(self):

        return bzrlib.progress.DummyProgress()

ui_factory = SilentUIFactory()