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91 lines
3 KiB
Python
91 lines
3 KiB
Python
# gtkbuilder_child.py
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#
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# Copyright 2022 James Westman <james@jwestman.net>
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This file is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# SPDX-License-Identifier: LGPL-3.0-or-later
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from functools import cached_property
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from .gobject_object import Object
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from .response_id import ResponseId
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from .common import *
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ALLOWED_PARENTS: T.List[T.Tuple[str, str]] = [
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("Gtk", "Buildable"),
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("Gio", "ListStore")
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]
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class Child(AstNode):
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grammar = [
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Optional([
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"[",
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Optional(["internal-child", UseLiteral("internal_child", True)]),
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UseIdent("child_type").expected("a child type"),
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Optional(ResponseId),
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"]",
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]),
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Object,
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]
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@validate()
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def parent_can_have_child(self):
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if gir_class := self.parent.gir_class:
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for namespace, name in ALLOWED_PARENTS:
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parent_type = self.root.gir.get_type(name, namespace)
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if gir_class.assignable_to(parent_type):
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break
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else:
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hints=["only Gio.ListStore or Gtk.Buildable implementors can have children"]
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if "child" in gir_class.properties:
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hints.append("did you mean to assign this object to the 'child' property?")
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raise CompileError(
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f"{gir_class.full_name} doesn't have children",
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hints=hints,
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)
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@cached_property
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def response_id(self) -> T.Optional[ResponseId]:
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"""Get action widget's response ID.
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If child is not action widget, returns `None`.
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"""
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response_ids = self.children[ResponseId]
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if response_ids:
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return response_ids[0]
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else:
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return None
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def emit_xml(self, xml: XmlEmitter):
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child_type = internal_child = None
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if self.tokens["internal_child"]:
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internal_child = self.tokens["child_type"]
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else:
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child_type = self.tokens["child_type"]
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xml.start_tag("child", type=child_type, internal_child=internal_child)
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for child in self.children:
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child.emit_xml(xml)
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xml.end_tag()
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@decompiler("child")
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def decompile_child(ctx, gir, type=None, internal_child=None):
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if type is not None:
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ctx.print(f"[{type}]")
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elif internal_child is not None:
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ctx.print(f"[internal-child {internal_child}]")
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return gir
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