fold_quoted_replies.py

#!/usr/bin/python
# coding: utf-8
# Copyright (C) 2013  Patrick Totzke <patricktotzke@gmail.com>
# This file is released under the GNU GPL, version 3 or a later revision.
#
# adapted from example1.py and example3.collapse.py from the urwidtrees examples

from urwidtrees.tree import SimpleTree  # noqa
from urwidtrees.decoration import CollapseIconMixin, DecoratedTree, CollapsibleIndentedTree, CollapsibleArrowTree  # noqa
from urwidtrees.nested import NestedTree  # noqa
from urwidtrees.widgets import TreeBox, TreeListWalker  # noqa
import urwid  # noqa
import re  # noqa

palette = [
    ('body', 'black', 'light gray'),
    ('focus', 'light gray', 'dark blue', 'standout'),
    ('bars', 'dark blue', 'light gray', ''),
    ('arrowtip', 'light blue', 'light gray', ''),
    ('connectors', 'light red', 'light gray', ''),
]


class FocusableText(urwid.WidgetWrap):
    """Selectable Text used for nodes in our example"""
    def __init__(self, txt, att, att_focus):
        t = urwid.Text(txt)
        w = urwid.AttrMap(t, att, att_focus)
        urwid.WidgetWrap.__init__(self, w)

    def selectable(self):
        return True

    def keypress(self, size, key):
        return key

    @property
    def text(self):
        return self._wrapped_widget._original_widget.text


class TextlinesList(SimpleTree):
    def __init__(self, content, attr=None, attr_focus=None):
        """
        :class:`SimpleTree` that contains a list of all-level-0 Text widgets
        for each line in content.
        """
        structure = []

        # depending on this config setting, we either add individual lines
        # or the complete context as focusable objects.
        for line in content.splitlines():
            structure.append((FocusableText(line, attr, attr_focus), None))
        SimpleTree.__init__(self, structure)

    def selectable(self):
        return True


def textlineslist(content, attr, attr_focus):
        structure = []

        # depending on this config setting, we either add individual lines
        # or the complete context as focusable objects.
        for line in content.splitlines():
            structure.append(FocusableText(line, attr, attr_focus))
        return urwid.Pile(structure)


def build_tree():
    tree1 = TextlinesList('Hello Alice,\nI am fine\nBob wrote:\n', 'body', 'focus')
    tree2 = TextlinesList('> Hi Bob,\n> How are you?\n> Charlie wrote:\n', 'body', 'focus')
    tree3 = TextlinesList('>> Hi Dean,\n>> How are you?\n>> Best, Charlie\n', 'body', 'focus')
    line1 = FocusableText('hello', 'body', 'focus')
    line2 = FocusableText('foo', 'body', 'focus')

    last_tree = SimpleTree(
        [(tree1, [(tree2, [(tree3, None)])])]
    )
    return last_tree


def unhandled_input(key):
    if isinstance(key, str) and key.lower() == 'q':
        raise urwid.ExitMainLoop()


if __name__ == "__main__":
    tree = CollapsibleIndentedTree(build_tree())

    treebox = TreeBox(NestedTree(tree))
    rootwidget = urwid.AttrMap(treebox, 'body')
    urwid.MainLoop(
        urwid.Frame(rootwidget, footer=urwid.AttrMap(urwid.Text('Q to quit'), 'focus')),
        palette,
        unhandled_input=unhandled_input,
    ).run()