language: Add translation-domain

This allows you to set the translation domain of a blueprint file.

blueprintcompiler/language/translation_domain.py

@@ -0,0 +1,31 @@
+# translation_domain.py
+#
+# Copyright 2022 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 .common import *
+
+
+class TranslationDomain(AstNode):
+    grammar = Statement(
+        "translation-domain",
+        UseQuoted("domain"),
+    )
+
+    @property
+    def domain(self):
+        return self.tokens["domain"]

blueprintcompiler/language/ui.py

@@ -26,6 +26,7 @@ from .gobject_object import Object
 from .gtk_menu import Menu, menu
 from .gtkbuilder_template import Template
 from .imports import GtkDirective, Import
+from .translation_domain import TranslationDomain
 
 
 class UI(AstNode):
@@ -34,6 +35,7 @@ class UI(AstNode):
     grammar = [
         GtkDirective,
         ZeroOrMore(Import),
+        Optional(TranslationDomain),
         Until(
             AnyOf(
                 Template,
@@ -75,6 +77,14 @@ class UI(AstNode):
     def gtk_decl(self) -> GtkDirective:
         return self.children[GtkDirective][0]
 
+    @property
+    def translation_domain(self) -> T.Optional[TranslationDomain]:
+        domains = self.children[TranslationDomain]
+        if len(domains):
+            return domains[0]
+        else:
+            return None
+
     @property
     def contents(self) -> T.List[T.Union[Object, Template, Menu]]:
         return [