scanner: Mark '_'-prefixed fields as introspectable=0

Typically these contain reserved callbacks; in any case we take
a leading underscore to mean 'private'.

1 files changed, 16 insertions, 0 deletions

diff --git a/giscanner/maintransformer.py b/giscanner/maintransformer.py
index a60b9bb..33d301b 100644
--- a/giscanner/maintransformer.py
+++ b/giscanner/maintransformer.py
@@ -55,6 +55,9 @@ class MainTransformer(object):
                 alias = ast.Alias('AttributeSet', target=ast.TYPE_ANY)
                 self._namespace.append(alias, replace=True)
 
+        # Some initial namespace surgery
+        self._namespace.walk(self._pass_fixup_hidden_fields)
+
         # We have a rough tree which should have most of of the types
         # we know about.  Let's attempt closure; walk over all of the
         # Type() types and see if they match up with something.
@@ -99,6 +102,19 @@ class MainTransformer(object):
 
     # Private
 
+    def _pass_fixup_hidden_fields(self, node, chain):
+        """Hide all callbacks starting with _; the typical
+usage is void (*_gtk_reserved1)(void);"""
+        if not isinstance(node, (ast.Class, ast.Interface,
+                                 ast.Record, ast.Union)):
+            return True
+        for field in node.fields:
+            if (field.name.startswith('_')
+                and field.anonymous_node is not None
+                and isinstance(field.anonymous_node, ast.Callback)):
+                field.introspectable = False
+        return True
+
     def _get_validate_parameter_name(self, parent, param_name, origin):
         try:
             param = parent.get_parameter(param_name)