flags: use nick instead of name

gtk builder does not support combining interger values with | in flags
properties, so the short names are used instead.

blueprintcompiler/language/values.py

@@ -211,12 +211,12 @@ class Flag(AstNode):
         return self.tokens["value"]
 
     @property
-    def value(self) -> T.Optional[int]:
+    def value(self) -> T.Optional[str]:
         type = self.context[ValueTypeCtx].value_type
         if not isinstance(type, Enumeration):
             return None
         elif member := type.members.get(self.name):
-            return member.value
+            return member.nick
         else:
             return None
 

tests/samples/flags.ui

@@ -7,7 +7,7 @@ corresponding .blp file and regenerate this file with blueprint-compiler.
 <interface>
   <requires lib="gtk" version="4.0"/>
   <object class="GApplication">
-    <property name="flags">1|4</property>
+    <property name="flags">is-service|handles-open</property>
   </object>
   <object class="GtkEventControllerScroll">
     <property name="flags">1</property>