reorganization: Finish moving parsing and AST

blueprintcompiler/language/ui.py

@@ -0,0 +1,103 @@
+# ui.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 .. import gir
+from .imports import GtkDirective, Import
+from .gtkbuilder_template import Template
+from .common import *
+
+
+class UI(AstNode):
+    """ The AST node for the entire file """
+
+    grammar = [
+        GtkDirective,
+        ZeroOrMore(Import),
+        Until(AnyOf(
+            Template,
+            OBJECT_HOOKS,
+        ), Eof()),
+    ]
+
+    @property
+    def gir(self):
+        gir_ctx = gir.GirContext()
+        self._gir_errors = []
+
+        try:
+            gir_ctx.add_namespace(self.children[GtkDirective][0].gir_namespace)
+        except CompileError as e:
+            e.start = self.children[GtkDirective][0].group.start
+            e.end = self.children[GtkDirective][0].group.end
+            self._gir_errors.append(e)
+
+        for i in self.children[Import]:
+            try:
+                if i.gir_namespace is not None:
+                    gir_ctx.add_namespace(i.gir_namespace)
+            except CompileError as e:
+                e.start = i.group.tokens["namespace"].start
+                e.end = i.group.tokens["version"].end
+                self._gir_errors.append(e)
+
+        return gir_ctx
+
+
+    @property
+    def objects_by_id(self):
+        return { obj.tokens["id"]: obj for obj in self.iterate_children_recursive() if obj.tokens["id"] is not None }
+
+
+    @validate()
+    def gir_errors(self):
+        # make sure gir is loaded
+        self.gir
+        if len(self._gir_errors):
+            raise MultipleErrors(self._gir_errors)
+
+
+    @validate()
+    def at_most_one_template(self):
+        if len(self.children[Template]) > 1:
+            for template in self.children[Template][1:]:
+                raise CompileError(
+                    f"Only one template may be defined per file, but this file contains {len(self.children[Template])}",
+                    template.group.tokens["name"].start, template.group.tokens["name"].end,
+                )
+
+
+    @validate()
+    def unique_ids(self):
+        passed = {}
+        for obj in self.iterate_children_recursive():
+            if obj.tokens["id"] is None:
+                continue
+
+            if obj.tokens["id"] in passed:
+                token = obj.group.tokens["id"]
+                raise CompileError(f"Duplicate object ID '{obj.tokens['id']}'", token.start, token.end)
+            passed[obj.tokens["id"]] = obj
+
+
+    def emit_xml(self, xml: XmlEmitter):
+        xml.start_tag("interface")
+        for x in self.children:
+            x.emit_xml(xml)
+        xml.end_tag()