Fix bug where completion would erroneously think it's inside a record (#1554)

Author: plux

apps/els_lsp/priv/code_navigation/src/completion_records.erl

@@ -8,3 +8,11 @@ function_a(#record_a{field_a = a, field_b = b}) ->
               %% #record_a{
               field_y = y},
     {}.
+
+-spec function_b(#record_b{}) -> #record_a{}.
+function_b(R) ->
+    function_a(R).
+
+-define(A, #record_a{}).
+function_c(R) ->
+    function_a(R).

apps/els_lsp/src/els_completion_provider.erl

@@ -628,15 +628,16 @@ complete_record_field(
 -spec complete_record_field(map(), pos(), binary()) -> items().
 complete_record_field(#{text := Text0} = Document, Pos, Suffix) ->
     Prefix0 = els_text:range(Text0, {1, 1}, Pos),
-    POIs = els_dt_document:pois(Document, [function]),
-    %% Look for record start between current pos and end of last function
+    POIs = els_dt_document:pois(Document, [function, spec, define, callback, record]),
+    %% Look for record start between current position and end of last
+    %% relevant top level expression
     Prefix =
         case els_scope:pois_before(POIs, #{from => Pos, to => Pos}) of
             [#{range := #{to := {Line, _}}} | _] ->
                 {_, Prefix1} = els_text:split_at_line(Prefix0, Line),
                 Prefix1;
             _ ->
-                %% No function before, consider all the text
+                %% Found no POI before, consider all the text
                 Prefix0
         end,
     case parse_record(els_text:strip_comments(Prefix), Suffix) of

apps/els_lsp/test/els_completion_SUITE.erl

@@ -33,6 +33,7 @@
     records/1,
     record_fields/1,
     record_fields_inside_record/1,
+    record_fields_no_completion/1,
     types/1,
     types_export_list/1,
     types_context/1,
@@ -1195,6 +1196,23 @@ record_fields_inside_record(Config) ->
     ?assertEqual(lists:sort(Expected2), lists:sort(Completion2)),
     ok.
 
+-spec record_fields_no_completion(config()) -> ok.
+record_fields_no_completion(Config) ->
+    %% These should NOT trigger record fields completion
+    %% Instead expected behaviour is to trigger regular atom completion
+    Uri = ?config(completion_records_uri, Config),
+    TriggerKindInvoked = ?COMPLETION_TRIGGER_KIND_INVOKED,
+    #{result := Result} =
+        els_client:completion(Uri, 14, 14, TriggerKindInvoked, <<>>),
+
+    #{result := Result} =
+        els_client:completion(Uri, 18, 14, TriggerKindInvoked, <<>>),
+
+    Labels = [Label || #{label := Label} <- Result],
+    ?assert(lists:member(<<"function_a/1">>, Labels)),
+    ?assert(lists:member(<<"function_b/1">>, Labels)),
+    ok.
+
 -spec types(config()) -> ok.
 types(Config) ->
     TriggerKind = ?COMPLETION_TRIGGER_KIND_INVOKED,