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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <algorithm>
#include "src/torque/ls/message-handler.h"
#include "src/torque/ls/globals.h"
#include "src/torque/ls/json-parser.h"
#include "src/torque/ls/message-pipe.h"
#include "src/torque/ls/message.h"
#include "src/torque/server-data.h"
#include "src/torque/source-positions.h"
#include "src/torque/torque-compiler.h"
namespace v8 {
namespace internal {
namespace torque {
DEFINE_CONTEXTUAL_VARIABLE(Logger)
DEFINE_CONTEXTUAL_VARIABLE(TorqueFileList)
namespace ls {
static const char kContentLength[] = "Content-Length: ";
static const size_t kContentLengthSize = sizeof(kContentLength) - 1;
JsonValue ReadMessage() {
std::string line;
std::getline(std::cin, line);
if (line.rfind(kContentLength) != 0) {
// Invalid message, we just crash.
Logger::Log("[fatal] Did not find Content-Length ...\n");
v8::base::OS::Abort();
}
const int content_length = std::atoi(line.substr(kContentLengthSize).c_str());
std::getline(std::cin, line);
std::string content(content_length, ' ');
std::cin.read(&content[0], content_length);
Logger::Log("[incoming] ", content, "\n\n");
return ParseJson(content);
}
void WriteMessage(JsonValue& message) {
std::string content = SerializeToString(message);
Logger::Log("[outgoing] ", content, "\n\n");
std::cout << kContentLength << content.size() << "\r\n\r\n";
std::cout << content << std::flush;
}
namespace {
void RecompileTorque() {
Logger::Log("[info] Start compilation run ...\n");
LanguageServerData::Get() = LanguageServerData();
SourceFileMap::Get() = SourceFileMap();
TorqueCompilerOptions options;
options.output_directory = "";
options.verbose = false;
options.collect_language_server_data = true;
options.abort_on_lint_errors = false;
CompileTorque(TorqueFileList::Get(), options);
Logger::Log("[info] Finished compilation run ...\n");
}
void HandleInitializeRequest(InitializeRequest request, MessageWriter writer) {
InitializeResponse response;
response.set_id(request.id());
response.result().capabilities().textDocumentSync();
response.result().capabilities().set_definitionProvider(true);
// TODO(szuend): Register for document synchronisation here,
// so we work with the content that the client
// provides, not directly read from files.
// TODO(szuend): Check that the client actually supports dynamic
// "workspace/didChangeWatchedFiles" capability.
// TODO(szuend): Check if client supports "LocationLink". This will
// influence the result of "goto definition".
writer(response.GetJsonValue());
}
void HandleInitializedNotification(MessageWriter writer) {
RegistrationRequest request;
// TODO(szuend): The language server needs a "global" request id counter.
request.set_id(2000);
request.set_method("client/registerCapability");
Registration reg = request.params().add_registrations();
auto options =
reg.registerOptions<DidChangeWatchedFilesRegistrationOptions>();
FileSystemWatcher watcher = options.add_watchers();
watcher.set_globPattern("**/*.tq");
watcher.set_kind(FileSystemWatcher::WatchKind::kAll);
reg.set_id("did-change-id");
reg.set_method("workspace/didChangeWatchedFiles");
writer(request.GetJsonValue());
}
void HandleTorqueFileListNotification(TorqueFileListNotification notification) {
CHECK_EQ(notification.params().object()["files"].tag, JsonValue::ARRAY);
std::vector<std::string>& files = TorqueFileList::Get();
Logger::Log("[info] Initial file list:\n");
for (const auto& file_json :
notification.params().object()["files"].ToArray()) {
CHECK(file_json.IsString());
// We only consider file URIs (there shouldn't be anything else).
// Internally we store the URI instead of the path, eliminating the need
// to encode it again.
if (auto maybe_path = FileUriDecode(file_json.ToString())) {
files.push_back(file_json.ToString());
Logger::Log(" ", *maybe_path, "\n");
}
}
// The Torque compiler expects to see some files first,
// we need to order them in the correct way.
std::sort(files.begin(), files.end(),
[](const std::string& a, const std::string& b) {
if (a.find("base.tq") != std::string::npos) return true;
if (b.find("base.tq") != std::string::npos) return false;
if (a.find("array.tq") != std::string::npos) return true;
if (b.find("array.tq") != std::string::npos) return false;
return false;
});
RecompileTorque();
}
void HandleGotoDefinitionRequest(GotoDefinitionRequest request,
MessageWriter writer) {
GotoDefinitionResponse response;
response.set_id(request.id());
SourceId id =
SourceFileMap::GetSourceId(request.params().textDocument().uri());
// Unknown source files cause an empty response which corresponds with
// the definition not beeing found.
if (!id.IsValid()) {
response.SetNull("result");
writer(response.GetJsonValue());
return;
}
LineAndColumn pos{request.params().position().line(),
request.params().position().character()};
if (auto maybe_definition = LanguageServerData::FindDefinition(id, pos)) {
SourcePosition definition = *maybe_definition;
std::string definition_file = SourceFileMap::GetSource(definition.source);
response.result().set_uri(definition_file);
Range range = response.result().range();
range.start().set_line(definition.start.line);
range.start().set_character(definition.start.column);
range.end().set_line(definition.end.line);
range.end().set_character(definition.end.column);
} else {
response.SetNull("result");
}
writer(response.GetJsonValue());
}
void HandleChangeWatchedFilesNotification(
DidChangeWatchedFilesNotification notification) {
// TODO(szuend): Implement updates to the TorqueFile list when create/delete
// notifications are received. Currently we simply re-compile.
RecompileTorque();
}
} // namespace
void HandleMessage(JsonValue& raw_message, MessageWriter writer) {
Request<bool> request(raw_message);
// We ignore responses for now. They are matched to requests
// by id and don't have a method set.
// TODO(szuend): Implement proper response handling for requests
// that originate from the server.
if (!request.has_method()) {
Logger::Log("[info] Unhandled response with id ", request.id(), "\n\n");
return;
}
const std::string method = request.method();
if (method == "initialize") {
HandleInitializeRequest(InitializeRequest(request.GetJsonValue()), writer);
} else if (method == "initialized") {
HandleInitializedNotification(writer);
} else if (method == "torque/fileList") {
HandleTorqueFileListNotification(
TorqueFileListNotification(request.GetJsonValue()));
} else if (method == "textDocument/definition") {
HandleGotoDefinitionRequest(GotoDefinitionRequest(request.GetJsonValue()),
writer);
} else if (method == "workspace/didChangeWatchedFiles") {
HandleChangeWatchedFilesNotification(
DidChangeWatchedFilesNotification(request.GetJsonValue()));
} else {
Logger::Log("[error] Message of type ", method, " is not handled!\n\n");
}
}
} // namespace ls
} // namespace torque
} // namespace internal
} // namespace v8
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