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// language-server.cpp
// This file implements the language server for Slang, conforming to the Language Server Protocol.
// https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <thread>
#include "../../source/core/slang-secure-crt.h"
#include "../../slang-com-helper.h"
#include "language-server-protocol.h"
#include "language-server.h"
namespace Slang
{
using namespace LanguageServerProtocol;
SlangResult LanguageServer::init(const InitializeParams& args)
{
SLANG_RETURN_ON_FAIL(m_connection->initWithStdStreams());
m_workspaceFolders = args.workspaceFolders;
return SLANG_OK;
}
slang::IGlobalSession* LanguageServer::getOrCreateGlobalSession()
{
if (!m_session)
{
// Just create the global session in the regular way if there isn't one set
if (SLANG_FAILED(slang_createGlobalSession(SLANG_API_VERSION, m_session.writeRef())))
{
return nullptr;
}
}
return m_session;
}
SlangResult LanguageServer::_executeSingle()
{
// If we don't have a message, we can quit for now
if (!m_connection->hasMessage())
{
return SLANG_OK;
}
const JSONRPCMessageType msgType = m_connection->getMessageType();
switch (msgType)
{
case JSONRPCMessageType::Call:
{
JSONRPCCall call;
SLANG_RETURN_ON_FAIL(m_connection->getRPCOrSendError(&call));
// Do different things
if (call.method == ExitParams::methodName)
{
m_quit = true;
return SLANG_OK;
}
else if (call.method == ShutdownParams::methodName)
{
m_connection->sendResult(NullResponse::get(), call.id);
return SLANG_OK;
}
else if (call.method == InitializeParams::methodName)
{
InitializeParams args = {};
SLANG_RETURN_ON_FAIL(
m_connection->toNativeArgsOrSendError(call.params, &args, call.id));
init(args);
InitializeResult result = {};
result.serverInfo.name = "SlangLanguageServer";
result.serverInfo.version = "1.0";
result.capabilities.positionEncoding = "utf-8";
result.capabilities.textDocumentSync.openClose = true;
result.capabilities.textDocumentSync.change = (int)TextDocumentSyncKind::Full;
m_connection->sendResult(&result, call.id);
return SLANG_OK;
}
else if (call.method == DidOpenTextDocumentParams::methodName)
{
DidOpenTextDocumentParams args;
SLANG_RETURN_ON_FAIL(
m_connection->toNativeArgsOrSendError(call.params, &args, call.id));
return didOpenTextDocument(args);
}
else if (call.method == DidCloseTextDocumentParams::methodName)
{
DidCloseTextDocumentParams args;
SLANG_RETURN_ON_FAIL(
m_connection->toNativeArgsOrSendError(call.params, &args, call.id));
return didCloseTextDocument(args);
}
else if (call.method == DidChangeTextDocumentParams::methodName)
{
DidChangeTextDocumentParams args;
SLANG_RETURN_ON_FAIL(
m_connection->toNativeArgsOrSendError(call.params, &args, call.id));
return didChangeTextDocument(args);
}
else if (call.method == "initialized")
{
return SLANG_OK;
}
else
{
return m_connection->sendError(JSONRPC::ErrorCode::MethodNotFound, call.id);
}
}
default:
{
return m_connection->sendError(
JSONRPC::ErrorCode::InvalidRequest, m_connection->getCurrentMessageId());
}
}
return SLANG_OK;
}
SlangResult LanguageServer::didOpenTextDocument(const DidOpenTextDocumentParams& args)
{
return SLANG_OK;
}
SlangResult LanguageServer::didCloseTextDocument(const DidCloseTextDocumentParams& args)
{
return SLANG_OK;
}
SlangResult LanguageServer::didChangeTextDocument(const DidChangeTextDocumentParams& args)
{
return SLANG_OK;
}
void LanguageServer::update()
{
}
SlangResult LanguageServer::execute()
{
m_connection = new JSONRPCConnection();
m_connection->initWithStdStreams();
while (m_connection->isActive() && !m_quit)
{
// Consume all messages first.
while (m_connection->tryReadMessage() == SLANG_OK)
{
const SlangResult res = _executeSingle();
}
// Now we can use this time to reparse user's code, report diagnostics, etc.
update();
}
return SLANG_OK;
}
} // namespace LanguageServer
int main(int argc, const char* const* argv)
{
bool isDebug = false;
for (auto i = 1; i < argc; i++)
{
if (Slang::UnownedStringSlice(argv[i]) == "--debug")
{
isDebug = true;
}
}
if (isDebug)
{
std::this_thread::sleep_for(std::chrono::seconds(10));
}
Slang::LanguageServer server;
SLANG_RETURN_ON_FAIL(server.execute());
return 0;
}
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