completions: Object names in signal handlers

blueprintcompiler/completions.py

@@ -23,13 +23,14 @@ from . import annotations, gir, language
 from .ast_utils import AstNode
 from .completions_utils import (
     CompletionContext,
-    completers,
-    completer,
-    get_sort_key,
-    new_statement_patterns,
-    get_property_completion,
     CompletionItemKind,
     CompletionPriority,
+    completer,
+    completers,
+    get_object_id_completions,
+    get_property_completion,
+    get_sort_key,
+    new_statement_patterns,
 )
 from .language.types import ClassName
 from .lsp_utils import Completion, CompletionItemKind, TextEdit, get_docs_section
@@ -350,16 +351,7 @@ def prop_value_completer(ctx: CompletionContext):
                 sort_text=get_sort_key(CompletionPriority.KEYWORD, "null"),
             )
 
-            for id, obj in ctx.ast_node.root.context[language.ScopeCtx].objects.items():
-                if obj.gir_class is not None and obj.gir_class.assignable_to(
-                    vt.value_type
-                ):
-                    yield Completion(
-                        id,
-                        CompletionItemKind.Variable,
-                        signature=" " + obj.signature,
-                        sort_text=get_sort_key(CompletionPriority.NAMED_OBJECT, id),
-                    )
+            yield from get_object_id_completions(ctx, vt.value_type)
 
             if isinstance(ctx.ast_node, language.Property):
                 yield from _available_namespace_completions(ctx)

blueprintcompiler/completions_utils.py

@@ -22,7 +22,7 @@ import typing as T
 from dataclasses import dataclass
 from enum import Enum
 
-from . import gir
+from . import gir, language
 from .ast_utils import AstNode
 from .lsp_utils import Completion, CompletionItemKind
 from .tokenizer import Token, TokenType
@@ -163,3 +163,18 @@ def get_property_completion(
         snippet=snippet,
         docs=doc,
     )
+
+
+def get_object_id_completions(
+    ctx: CompletionContext, value_type: T.Optional[gir.GirType] = None
+):
+    for id, obj in ctx.ast_node.root.context[language.ScopeCtx].objects.items():
+        if value_type is None or (
+            obj.gir_class is not None and obj.gir_class.assignable_to(value_type)
+        ):
+            yield Completion(
+                id,
+                CompletionItemKind.Variable,
+                signature=" " + obj.signature,
+                sort_text=get_sort_key(CompletionPriority.NAMED_OBJECT, id),
+            )

blueprintcompiler/language/gobject_signal.py

@@ -247,3 +247,11 @@ def decompile_signal(
     line += ";"
     ctx.print(line)
     return gir
+
+
+@completer(
+    [Signal],
+    [[(TokenType.PUNCTUATION, "(")]],
+)
+def signal_object_completer(ctx: CompletionContext):
+    yield from get_object_id_completions(ctx)