Support template without parent

blueprintcompiler/gir.py

@@ -905,7 +905,11 @@ class Namespace(GirNode):
     def get_type_by_cname(self, cname: str) -> T.Optional[GirType]:
         """Gets a type from this namespace by its C name."""
         for item in self.entries.values():
-            if hasattr(item, "cname") and item.cname == cname:
+            if (
+                hasattr(item, "cname")
+                and item.cname is not None
+                and item.cname == cname
+            ):
                 return item
         return None
 

blueprintcompiler/language/gtkbuilder_template.py

@@ -97,6 +97,9 @@ def decompile_template(ctx: DecompileCtx, gir, klass, parent=None):
         else:
             return "$" + cname
 
+    if parent is None:
+        ctx.print(f"template {class_name(klass)} {{")
+    else:
         ctx.print(f"template {class_name(klass)} : {class_name(parent)} {{")
 
     ctx.template_class = klass

tests/samples/template_orphan.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+template $TestTemplate {
+  test-property: 'Hello, world';
+}

tests/samples/template_orphan.ui

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="TestTemplate">
+    <property name="test-property">Hello, world</property>
+  </template>
+</interface>

tests/test_samples.py

@@ -186,6 +186,7 @@ class TestSamples(unittest.TestCase):
                 "template_bind_property",
                 "template_id",
                 "template_no_parent",
+                "template_orphan",
                 "template_simple_binding",
                 "typeof",
                 "unchecked_class",
@@ -235,6 +236,7 @@ class TestSamples(unittest.TestCase):
         self.assert_decompile("strings_dec")
         self.assert_decompile("style_dec")
         self.assert_decompile("template")
+        self.assert_decompile("template_orphan")
         self.assert_decompile("translated")
         self.assert_decompile("using")
         self.assert_decompile("unchecked_class_dec")