# gtk_layout.py
#
# Copyright 2021 James Westman <james@jwestman.net>
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 3 of the
# License, or (at your option) any later version.
#
# This file 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# SPDX-License-Identifier: LGPL-3.0-or-later


from ..ast_utils import AstNode, BaseAttribute
from ..completions_utils import *
from ..parse_tree import *
from ..parser_utils import *
from ..xml_emitter import XmlEmitter


class Layout(AstNode):
    def emit_xml(self, xml: XmlEmitter):
        xml.start_tag("layout")
        for child in self.children:
            child.emit_xml(xml)
        xml.end_tag()


class LayoutProperty(BaseAttribute):
    tag_name = "property"


layout_prop = Group(
    LayoutProperty,
    Statement(
        UseIdent("name"),
        Op(":"),
        value.expected("a value"),
    )
)

layout = Group(
    Layout,
    Sequence(
        Keyword("layout"),
        OpenBlock().expected("`{`"),
        Until(layout_prop, CloseBlock()),
    )
)