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//===--- ClangdLSPServer.h - LSP server --------------------------*- C++-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_CLANGDLSPSERVER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_CLANGDLSPSERVER_H
#include "ClangdServer.h"
#include "DraftStore.h"
#include "FindSymbols.h"
#include "GlobalCompilationDatabase.h"
#include "Path.h"
#include "Protocol.h"
#include "Transport.h"
#include "clang/Tooling/Core/Replacement.h"
#include "llvm/ADT/Optional.h"
#include <memory>
namespace clang {
namespace clangd {
class SymbolIndex;
/// This class exposes ClangdServer's capabilities via Language Server Protocol.
///
/// MessageHandler binds the implemented LSP methods (e.g. onInitialize) to
/// corresponding JSON-RPC methods ("initialize").
/// The server also supports $/cancelRequest (MessageHandler provides this).
class ClangdLSPServer : private DiagnosticsConsumer {
public:
/// If \p CompileCommandsDir has a value, compile_commands.json will be
/// loaded only from \p CompileCommandsDir. Otherwise, clangd will look
/// for compile_commands.json in all parent directories of each file.
/// If UseDirBasedCDB is false, compile commands are not read from disk.
// FIXME: Clean up signature around CDBs.
ClangdLSPServer(Transport &Transp, const clangd::CodeCompleteOptions &CCOpts,
llvm::Optional<Path> CompileCommandsDir, bool UseDirBasedCDB,
const ClangdServer::Options &Opts);
~ClangdLSPServer();
/// Run LSP server loop, communicating with the Transport provided in the
/// constructor. This method must not be executed more than once.
///
/// \return Whether we shut down cleanly with a 'shutdown' -> 'exit' sequence.
bool run();
private:
// Implement DiagnosticsConsumer.
void onDiagnosticsReady(PathRef File, std::vector<Diag> Diagnostics) override;
void onFileUpdated(PathRef File, const TUStatus &Status) override;
// LSP methods. Notifications have signature void(const Params&).
// Calls have signature void(const Params&, Callback<Response>).
void onInitialize(const InitializeParams &, Callback<llvm::json::Value>);
void onShutdown(const ShutdownParams &, Callback<std::nullptr_t>);
void onSync(const NoParams &, Callback<std::nullptr_t>);
void onDocumentDidOpen(const DidOpenTextDocumentParams &);
void onDocumentDidChange(const DidChangeTextDocumentParams &);
void onDocumentDidClose(const DidCloseTextDocumentParams &);
void onDocumentOnTypeFormatting(const DocumentOnTypeFormattingParams &,
Callback<std::vector<TextEdit>>);
void onDocumentRangeFormatting(const DocumentRangeFormattingParams &,
Callback<std::vector<TextEdit>>);
void onDocumentFormatting(const DocumentFormattingParams &,
Callback<std::vector<TextEdit>>);
// The results are serialized 'vector<DocumentSymbol>' if
// SupportsHierarchicalDocumentSymbol is true and 'vector<SymbolInformation>'
// otherwise.
void onDocumentSymbol(const DocumentSymbolParams &,
Callback<llvm::json::Value>);
void onCodeAction(const CodeActionParams &, Callback<llvm::json::Value>);
void onCompletion(const CompletionParams &, Callback<CompletionList>);
void onSignatureHelp(const TextDocumentPositionParams &,
Callback<SignatureHelp>);
void onGoToDefinition(const TextDocumentPositionParams &,
Callback<std::vector<Location>>);
void onReference(const ReferenceParams &, Callback<std::vector<Location>>);
void onSwitchSourceHeader(const TextDocumentIdentifier &,
Callback<std::string>);
void onDocumentHighlight(const TextDocumentPositionParams &,
Callback<std::vector<DocumentHighlight>>);
void onFileEvent(const DidChangeWatchedFilesParams &);
void onCommand(const ExecuteCommandParams &, Callback<llvm::json::Value>);
void onWorkspaceSymbol(const WorkspaceSymbolParams &,
Callback<std::vector<SymbolInformation>>);
void onRename(const RenameParams &, Callback<WorkspaceEdit>);
void onHover(const TextDocumentPositionParams &,
Callback<llvm::Optional<Hover>>);
void onChangeConfiguration(const DidChangeConfigurationParams &);
void onSymbolInfo(const TextDocumentPositionParams &,
Callback<std::vector<SymbolDetails>>);
std::vector<Fix> getFixes(StringRef File, const clangd::Diagnostic &D);
/// Checks if completion request should be ignored. We need this due to the
/// limitation of the LSP. Per LSP, a client sends requests for all "trigger
/// character" we specify, but for '>' and ':' we need to check they actually
/// produce '->' and '::', respectively.
bool shouldRunCompletion(const CompletionParams &Params) const;
/// Forces a reparse of all currently opened files. As a result, this method
/// may be very expensive. This method is normally called when the
/// compilation database is changed.
void reparseOpenedFiles();
void applyConfiguration(const ConfigurationSettings &Settings);
/// Used to indicate that the 'shutdown' request was received from the
/// Language Server client.
bool ShutdownRequestReceived = false;
std::mutex FixItsMutex;
typedef std::map<clangd::Diagnostic, std::vector<Fix>, LSPDiagnosticCompare>
DiagnosticToReplacementMap;
/// Caches FixIts per file and diagnostics
llvm::StringMap<DiagnosticToReplacementMap> FixItsMap;
// Most code should not deal with Transport directly.
// MessageHandler deals with incoming messages, use call() etc for outgoing.
clangd::Transport &Transp;
class MessageHandler;
std::unique_ptr<MessageHandler> MsgHandler;
std::atomic<int> NextCallID = {0};
std::mutex TranspWriter;
void call(StringRef Method, llvm::json::Value Params);
void notify(StringRef Method, llvm::json::Value Params);
RealFileSystemProvider FSProvider;
/// Options used for code completion
clangd::CodeCompleteOptions CCOpts;
/// Options used for diagnostics.
ClangdDiagnosticOptions DiagOpts;
/// The supported kinds of the client.
SymbolKindBitset SupportedSymbolKinds;
/// The supported completion item kinds of the client.
CompletionItemKindBitset SupportedCompletionItemKinds;
/// Whether the client supports CodeAction response objects.
bool SupportsCodeAction = false;
/// From capabilities of textDocument/documentSymbol.
bool SupportsHierarchicalDocumentSymbol = false;
/// Whether the client supports showing file status.
bool SupportFileStatus = false;
// Store of the current versions of the open documents.
DraftStore DraftMgr;
// The CDB is created by the "initialize" LSP method.
bool UseDirBasedCDB; // FIXME: make this a capability.
llvm::Optional<Path> CompileCommandsDir; // FIXME: merge with capability?
std::unique_ptr<GlobalCompilationDatabase> BaseCDB;
// CDB is BaseCDB plus any comands overridden via LSP extensions.
llvm::Optional<OverlayCDB> CDB;
// The ClangdServer is created by the "initialize" LSP method.
// It is destroyed before run() returns, to ensure worker threads exit.
ClangdServer::Options ClangdServerOpts;
llvm::Optional<ClangdServer> Server;
};
} // namespace clangd
} // namespace clang
#endif // LLVM_CLANG_TOOLS_EXTRA_CLANGD_CLANGDLSPSERVER_H
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