blob: 2a424c4e755d6eb282d34017f9307dfb0db6eb10 [file] [log] [blame]
// Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:async';
import 'package:analysis_server/protocol/protocol.dart';
import 'package:analysis_server/protocol/protocol_generated.dart';
import 'package:analysis_server/src/computer/computer_signature.dart';
import 'package:analysis_server/src/handler/legacy/legacy_handler.dart';
/// The handler for the `analysis.getSignature` request.
class AnalysisGetSignatureHandler extends LegacyHandler {
/// Initialize a newly created handler to be able to service requests for the
/// [server].
AnalysisGetSignatureHandler(
super.server, super.request, super.cancellationToken);
@override
Future<void> handle() async {
var params = AnalysisGetSignatureParams.fromRequest(request);
var file = params.file;
if (server.sendResponseErrorIfInvalidFilePath(request, file)) {
return;
}
// Prepare the resolved units.
var result = await server.getResolvedUnit(file);
if (result == null || !result.exists) {
sendResponse(Response.getSignatureInvalidFile(request));
return;
}
// Ensure the offset provided is a valid location in the file.
final unit = result.unit;
final computer = DartUnitSignatureComputer(
server.getDartdocDirectiveInfoFor(result), unit, params.offset);
if (!computer.offsetIsValid) {
sendResponse(Response.getSignatureInvalidOffset(request));
return;
}
// Try to get a signature.
final signature = computer.compute();
if (signature == null) {
sendResponse(Response.getSignatureUnknownFunction(request));
return;
}
sendResult(signature);
}
}