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# This file is part of the Frescobaldi project, http://www.frescobaldi.org/
#
# Copyright (c) 2012 - 2012 by Wilbert Berendsen
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
Provides code folding.
The sidebar/ manages the visibility of the folding area.
"""
from __future__ import unicode_literals
import cursortools
import tokeniter
import ly.lex
import widgets.folding
line_painter = widgets.folding.LinePainter()
class Folder(widgets.folding.Folder):
def fold_events(self, block):
"""Provides folding information by looking at indent/dedent tokens."""
for t in tokeniter.tokens(block):
if isinstance(t, ly.lex.Indent):
yield widgets.folding.START
elif isinstance(t, ly.lex.Dedent):
yield widgets.folding.STOP
def mark(self, block, state=None):
if state is None:
try:
return block.userData().folded
except AttributeError:
return False
elif state:
cursortools.data(block).folded = state
else:
try:
del block.userData().folded
except AttributeError:
pass
class FoldingArea(widgets.folding.FoldingArea):
Folder = Folder
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