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llvm-project/clang-tools-extra/clangd/ClangdServer.cpp

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//===--- ClangdServer.cpp - Main clangd server code --------------*- 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
//
//===-------------------------------------------------------------------===//
#include "ClangdServer.h"
#include "CodeComplete.h"
#include "FindSymbols.h"
#include "Format.h"
#include "HeaderSourceSwitch.h"
#include "Headers.h"
#include "ParsedAST.h"
#include "Preamble.h"
#include "Protocol.h"
#include "SemanticHighlighting.h"
#include "SemanticSelection.h"
#include "SourceCode.h"
#include "TUScheduler.h"
#include "XRefs.h"
#include "index/CanonicalIncludes.h"
#include "index/FileIndex.h"
#include "index/Merge.h"
#include "refactor/Rename.h"
#include "refactor/Tweak.h"
#include "support/Logger.h"
#include "support/Markup.h"
#include "support/Trace.h"
#include "clang/Format/Format.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Tooling/CompilationDatabase.h"
#include "clang/Tooling/Core/Replacement.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/ScopeExit.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <future>
#include <memory>
#include <mutex>
#include <type_traits>
namespace clang {
namespace clangd {
namespace {
// Update the FileIndex with new ASTs and plumb the diagnostics responses.
struct UpdateIndexCallbacks : public ParsingCallbacks {
UpdateIndexCallbacks(FileIndex *FIndex,
ClangdServer::Callbacks *ServerCallbacks,
bool TheiaSemanticHighlighting)
: FIndex(FIndex), ServerCallbacks(ServerCallbacks),
TheiaSemanticHighlighting(TheiaSemanticHighlighting) {}
void onPreambleAST(PathRef Path, llvm::StringRef Version, ASTContext &Ctx,
std::shared_ptr<clang::Preprocessor> PP,
const CanonicalIncludes &CanonIncludes) override {
if (FIndex)
FIndex->updatePreamble(Path, Version, Ctx, std::move(PP), CanonIncludes);
}
void onMainAST(PathRef Path, ParsedAST &AST, PublishFn Publish) override {
if (FIndex)
FIndex->updateMain(Path, AST);
std::vector<Diag> Diagnostics = AST.getDiagnostics();
std::vector<HighlightingToken> Highlightings;
if (TheiaSemanticHighlighting)
Highlightings = getSemanticHighlightings(AST);
if (ServerCallbacks)
Publish([&]() {
ServerCallbacks->onDiagnosticsReady(Path, AST.version(),
std::move(Diagnostics));
if (TheiaSemanticHighlighting)
ServerCallbacks->onHighlightingsReady(Path, AST.version(),
std::move(Highlightings));
});
}
void onFailedAST(PathRef Path, llvm::StringRef Version,
std::vector<Diag> Diags, PublishFn Publish) override {
if (ServerCallbacks)
Publish(
[&]() { ServerCallbacks->onDiagnosticsReady(Path, Version, Diags); });
}
void onFileUpdated(PathRef File, const TUStatus &Status) override {
if (ServerCallbacks)
ServerCallbacks->onFileUpdated(File, Status);
}
private:
FileIndex *FIndex;
ClangdServer::Callbacks *ServerCallbacks;
bool TheiaSemanticHighlighting;
};
} // namespace
ClangdServer::Options ClangdServer::optsForTest() {
ClangdServer::Options Opts;
Opts.UpdateDebounce = DebouncePolicy::fixed(/*zero*/ {});
Opts.StorePreamblesInMemory = true;
Opts.AsyncThreadsCount = 4; // Consistent!
Opts.TheiaSemanticHighlighting = true;
return Opts;
}
ClangdServer::Options::operator TUScheduler::Options() const {
TUScheduler::Options Opts;
Opts.AsyncThreadsCount = AsyncThreadsCount;
Opts.RetentionPolicy = RetentionPolicy;
Opts.StorePreamblesInMemory = StorePreamblesInMemory;
Opts.UpdateDebounce = UpdateDebounce;
return Opts;
}
ClangdServer::ClangdServer(const GlobalCompilationDatabase &CDB,
const FileSystemProvider &FSProvider,
const Options &Opts, Callbacks *Callbacks)
: FSProvider(FSProvider),
DynamicIdx(Opts.BuildDynamicSymbolIndex
? new FileIndex(Opts.HeavyweightDynamicSymbolIndex)
: nullptr),
GetClangTidyOptions(Opts.GetClangTidyOptions),
SuggestMissingIncludes(Opts.SuggestMissingIncludes),
BuildRecoveryAST(Opts.BuildRecoveryAST), TweakFilter(Opts.TweakFilter),
WorkspaceRoot(Opts.WorkspaceRoot),
// Pass a callback into `WorkScheduler` to extract symbols from a newly
// parsed file and rebuild the file index synchronously each time an AST
// is parsed.
// FIXME(ioeric): this can be slow and we may be able to index on less
// critical paths.
WorkScheduler(
CDB, TUScheduler::Options(Opts),
std::make_unique<UpdateIndexCallbacks>(
DynamicIdx.get(), Callbacks, Opts.TheiaSemanticHighlighting)) {
// Adds an index to the stack, at higher priority than existing indexes.
auto AddIndex = [&](SymbolIndex *Idx) {
if (this->Index != nullptr) {
MergedIdx.push_back(std::make_unique<MergedIndex>(Idx, this->Index));
this->Index = MergedIdx.back().get();
} else {
this->Index = Idx;
}
};
if (Opts.StaticIndex)
AddIndex(Opts.StaticIndex);
if (Opts.BackgroundIndex) {
BackgroundIdx = std::make_unique<BackgroundIndex>(
Context::current().clone(), FSProvider, CDB,
BackgroundIndexStorage::createDiskBackedStorageFactory(
[&CDB](llvm::StringRef File) { return CDB.getProjectInfo(File); }),
std::max(Opts.AsyncThreadsCount, 1u),
[Callbacks](BackgroundQueue::Stats S) {
if (Callbacks)
Callbacks->onBackgroundIndexProgress(S);
});
AddIndex(BackgroundIdx.get());
}
if (DynamicIdx)
AddIndex(DynamicIdx.get());
}
void ClangdServer::addDocument(PathRef File, llvm::StringRef Contents,
llvm::StringRef Version,
WantDiagnostics WantDiags, bool ForceRebuild) {
auto FS = FSProvider.getFileSystem();
ParseOptions Opts;
Opts.ClangTidyOpts = tidy::ClangTidyOptions::getDefaults();
// FIXME: call tidy options builder on the worker thread, it can do IO.
if (GetClangTidyOptions)
Opts.ClangTidyOpts = GetClangTidyOptions(*FS, File);
Opts.SuggestMissingIncludes = SuggestMissingIncludes;
// Compile command is set asynchronously during update, as it can be slow.
ParseInputs Inputs;
Inputs.FS = FS;
Inputs.Contents = std::string(Contents);
Inputs.Version = Version.str();
Inputs.ForceRebuild = ForceRebuild;
Inputs.Opts = std::move(Opts);
Inputs.Index = Index;
Inputs.Opts.BuildRecoveryAST = BuildRecoveryAST;
bool NewFile = WorkScheduler.update(File, Inputs, WantDiags);
// If we loaded Foo.h, we want to make sure Foo.cpp is indexed.
if (NewFile && BackgroundIdx)
BackgroundIdx->boostRelated(File);
}
void ClangdServer::removeDocument(PathRef File) { WorkScheduler.remove(File); }
void ClangdServer::codeComplete(PathRef File, Position Pos,
const clangd::CodeCompleteOptions &Opts,
Callback<CodeCompleteResult> CB) {
// Copy completion options for passing them to async task handler.
auto CodeCompleteOpts = Opts;
if (!CodeCompleteOpts.Index) // Respect overridden index.
CodeCompleteOpts.Index = Index;
auto Task = [Pos, FS = FSProvider.getFileSystem(), CodeCompleteOpts,
File = File.str(), CB = std::move(CB),
this](llvm::Expected<InputsAndPreamble> IP) mutable {
if (!IP)
return CB(IP.takeError());
if (auto Reason = isCancelled())
return CB(llvm::make_error<CancelledError>(Reason));
llvm::Optional<SpeculativeFuzzyFind> SpecFuzzyFind;
if (!IP->Preamble) {
// No speculation in Fallback mode, as it's supposed to be much faster
// without compiling.
vlog("Build for file {0} is not ready. Enter fallback mode.", File);
} else {
if (CodeCompleteOpts.Index && CodeCompleteOpts.SpeculativeIndexRequest) {
SpecFuzzyFind.emplace();
{
std::lock_guard<std::mutex> Lock(
CachedCompletionFuzzyFindRequestMutex);
SpecFuzzyFind->CachedReq =
CachedCompletionFuzzyFindRequestByFile[File];
}
}
}
// FIXME(ibiryukov): even if Preamble is non-null, we may want to check
// both the old and the new version in case only one of them matches.
CodeCompleteResult Result = clangd::codeComplete(
File, IP->Command, IP->Preamble, IP->Contents, Pos, FS,
CodeCompleteOpts, SpecFuzzyFind ? SpecFuzzyFind.getPointer() : nullptr);
{
clang::clangd::trace::Span Tracer("Completion results callback");
CB(std::move(Result));
}
if (SpecFuzzyFind && SpecFuzzyFind->NewReq.hasValue()) {
std::lock_guard<std::mutex> Lock(CachedCompletionFuzzyFindRequestMutex);
CachedCompletionFuzzyFindRequestByFile[File] =
SpecFuzzyFind->NewReq.getValue();
}
// SpecFuzzyFind is only destroyed after speculative fuzzy find finishes.
// We don't want `codeComplete` to wait for the async call if it doesn't use
// the result (e.g. non-index completion, speculation fails), so that `CB`
// is called as soon as results are available.
};
// We use a potentially-stale preamble because latency is critical here.
WorkScheduler.runWithPreamble(
"CodeComplete", File,
(Opts.RunParser == CodeCompleteOptions::AlwaysParse)
? TUScheduler::Stale
: TUScheduler::StaleOrAbsent,
std::move(Task));
}
void ClangdServer::signatureHelp(PathRef File, Position Pos,
Callback<SignatureHelp> CB) {
auto Action = [Pos, FS = FSProvider.getFileSystem(), File = File.str(),
CB = std::move(CB),
this](llvm::Expected<InputsAndPreamble> IP) mutable {
if (!IP)
return CB(IP.takeError());
const auto *PreambleData = IP->Preamble;
if (!PreambleData)
return CB(llvm::createStringError(llvm::inconvertibleErrorCode(),
"Failed to parse includes"));
CB(clangd::signatureHelp(File, IP->Command, *PreambleData, IP->Contents,
Pos, FS, Index));
};
// Unlike code completion, we wait for a preamble here.
WorkScheduler.runWithPreamble("SignatureHelp", File, TUScheduler::Stale,
std::move(Action));
}
llvm::Expected<tooling::Replacements>
ClangdServer::formatRange(llvm::StringRef Code, PathRef File, Range Rng) {
llvm::Expected<size_t> Begin = positionToOffset(Code, Rng.start);
if (!Begin)
return Begin.takeError();
llvm::Expected<size_t> End = positionToOffset(Code, Rng.end);
if (!End)
return End.takeError();
return formatCode(Code, File, {tooling::Range(*Begin, *End - *Begin)});
}
llvm::Expected<tooling::Replacements>
ClangdServer::formatFile(llvm::StringRef Code, PathRef File) {
// Format everything.
return formatCode(Code, File, {tooling::Range(0, Code.size())});
}
llvm::Expected<std::vector<TextEdit>>
ClangdServer::formatOnType(llvm::StringRef Code, PathRef File, Position Pos,
StringRef TriggerText) {
llvm::Expected<size_t> CursorPos = positionToOffset(Code, Pos);
if (!CursorPos)
return CursorPos.takeError();
auto FS = FSProvider.getFileSystem();
auto Style = format::getStyle(format::DefaultFormatStyle, File,
format::DefaultFallbackStyle, Code, FS.get());
if (!Style)
return Style.takeError();
std::vector<TextEdit> Result;
for (const tooling::Replacement &R :
formatIncremental(Code, *CursorPos, TriggerText, *Style))
Result.push_back(replacementToEdit(Code, R));
return Result;
}
void ClangdServer::prepareRename(PathRef File, Position Pos,
const RenameOptions &RenameOpts,
Callback<llvm::Optional<Range>> CB) {
auto Action = [Pos, File = File.str(), CB = std::move(CB), RenameOpts,
this](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
auto &AST = InpAST->AST;
const auto &SM = AST.getSourceManager();
auto Loc = sourceLocationInMainFile(SM, Pos);
if (!Loc)
return CB(Loc.takeError());
const auto *TouchingIdentifier =
spelledIdentifierTouching(*Loc, AST.getTokens());
if (!TouchingIdentifier)
return CB(llvm::None); // no rename on non-identifiers.
auto Range = halfOpenToRange(
SM, CharSourceRange::getCharRange(TouchingIdentifier->location(),
TouchingIdentifier->endLocation()));
if (RenameOpts.AllowCrossFile)
// FIXME: we now assume cross-file rename always succeeds, revisit this.
return CB(Range);
// Performing the local rename isn't substantially more expensive than
// doing an AST-based check, so we just rename and throw away the results.
auto Changes = clangd::rename({Pos, "dummy", AST, File, Index, RenameOpts,
/*GetDirtyBuffer=*/nullptr});
if (!Changes) {
// LSP says to return null on failure, but that will result in a generic
// failure message. If we send an LSP error response, clients can surface
// the message to users (VSCode does).
return CB(Changes.takeError());
}
return CB(Range);
};
WorkScheduler.runWithAST("PrepareRename", File, std::move(Action));
}
void ClangdServer::rename(PathRef File, Position Pos, llvm::StringRef NewName,
const RenameOptions &Opts, Callback<FileEdits> CB) {
// A snapshot of all file dirty buffers.
llvm::StringMap<std::string> Snapshot = WorkScheduler.getAllFileContents();
auto Action = [File = File.str(), NewName = NewName.str(), Pos, Opts,
CB = std::move(CB), Snapshot = std::move(Snapshot),
this](llvm::Expected<InputsAndAST> InpAST) mutable {
// Tracks number of files edited per invocation.
static constexpr trace::Metric RenameFiles("rename_files",
trace::Metric::Distribution);
if (!InpAST)
return CB(InpAST.takeError());
auto GetDirtyBuffer =
[&Snapshot](PathRef AbsPath) -> llvm::Optional<std::string> {
auto It = Snapshot.find(AbsPath);
if (It == Snapshot.end())
return llvm::None;
return It->second;
};
auto Edits = clangd::rename(
{Pos, NewName, InpAST->AST, File, Index, Opts, GetDirtyBuffer});
if (!Edits)
return CB(Edits.takeError());
if (Opts.WantFormat) {
auto Style = getFormatStyleForFile(File, InpAST->Inputs.Contents,
InpAST->Inputs.FS.get());
llvm::Error Err = llvm::Error::success();
for (auto &E : *Edits)
Err =
llvm::joinErrors(reformatEdit(E.getValue(), Style), std::move(Err));
if (Err)
return CB(std::move(Err));
}
RenameFiles.record(Edits->size());
return CB(std::move(*Edits));
};
WorkScheduler.runWithAST("Rename", File, std::move(Action));
}
// May generate several candidate selections, due to SelectionTree ambiguity.
// vector of pointers because GCC doesn't like non-copyable Selection.
static llvm::Expected<std::vector<std::unique_ptr<Tweak::Selection>>>
tweakSelection(const Range &Sel, const InputsAndAST &AST) {
auto Begin = positionToOffset(AST.Inputs.Contents, Sel.start);
if (!Begin)
return Begin.takeError();
auto End = positionToOffset(AST.Inputs.Contents, Sel.end);
if (!End)
return End.takeError();
std::vector<std::unique_ptr<Tweak::Selection>> Result;
SelectionTree::createEach(
AST.AST.getASTContext(), AST.AST.getTokens(), *Begin, *End,
[&](SelectionTree T) {
Result.push_back(std::make_unique<Tweak::Selection>(
AST.Inputs.Index, AST.AST, *Begin, *End, std::move(T)));
return false;
});
assert(!Result.empty() && "Expected at least one SelectionTree");
return std::move(Result);
}
void ClangdServer::enumerateTweaks(PathRef File, Range Sel,
Callback<std::vector<TweakRef>> CB) {
// Tracks number of times a tweak has been offered.
static constexpr trace::Metric TweakAvailable(
"tweak_available", trace::Metric::Counter, "tweak_id");
auto Action = [File = File.str(), Sel, CB = std::move(CB),
this](Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
auto Selections = tweakSelection(Sel, *InpAST);
if (!Selections)
return CB(Selections.takeError());
std::vector<TweakRef> Res;
// Don't allow a tweak to fire more than once across ambiguous selections.
llvm::DenseSet<llvm::StringRef> PreparedTweaks;
auto Filter = [&](const Tweak &T) {
return TweakFilter(T) && !PreparedTweaks.count(T.id());
};
for (const auto &Sel : *Selections) {
for (auto &T : prepareTweaks(*Sel, Filter)) {
Res.push_back({T->id(), T->title(), T->intent()});
PreparedTweaks.insert(T->id());
TweakAvailable.record(1, T->id());
}
}
CB(std::move(Res));
};
WorkScheduler.runWithAST("EnumerateTweaks", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
void ClangdServer::applyTweak(PathRef File, Range Sel, StringRef TweakID,
Callback<Tweak::Effect> CB) {
// Tracks number of times a tweak has been applied.
static constexpr trace::Metric TweakAttempt(
"tweak_attempt", trace::Metric::Counter, "tweak_id");
TweakAttempt.record(1, TweakID);
auto Action =
[File = File.str(), Sel, TweakID = TweakID.str(), CB = std::move(CB),
FS = FSProvider.getFileSystem()](Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
auto Selections = tweakSelection(Sel, *InpAST);
if (!Selections)
return CB(Selections.takeError());
llvm::Optional<llvm::Expected<Tweak::Effect>> Effect;
// Try each selection, take the first one that prepare()s.
// If they all fail, Effect will hold get the last error.
for (const auto &Selection : *Selections) {
auto T = prepareTweak(TweakID, *Selection);
if (T) {
Effect = (*T)->apply(*Selection);
break;
}
Effect = T.takeError();
}
assert(Effect.hasValue() && "Expected at least one selection");
if (*Effect) {
// Tweaks don't apply clang-format, do that centrally here.
for (auto &It : (*Effect)->ApplyEdits) {
Edit &E = It.second;
format::FormatStyle Style =
getFormatStyleForFile(File, E.InitialCode, FS.get());
if (llvm::Error Err = reformatEdit(E, Style))
elog("Failed to format {0}: {1}", It.first(), std::move(Err));
}
}
return CB(std::move(*Effect));
};
WorkScheduler.runWithAST("ApplyTweak", File, std::move(Action));
}
void ClangdServer::dumpAST(PathRef File,
llvm::unique_function<void(std::string)> Callback) {
auto Action = [Callback = std::move(Callback)](
llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST) {
llvm::consumeError(InpAST.takeError());
return Callback("<no-ast>");
}
std::string Result;
llvm::raw_string_ostream ResultOS(Result);
clangd::dumpAST(InpAST->AST, ResultOS);
ResultOS.flush();
Callback(Result);
};
WorkScheduler.runWithAST("DumpAST", File, std::move(Action));
}
void ClangdServer::locateSymbolAt(PathRef File, Position Pos,
Callback<std::vector<LocatedSymbol>> CB) {
auto Action = [Pos, CB = std::move(CB),
this](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::locateSymbolAt(InpAST->AST, Pos, Index));
};
WorkScheduler.runWithAST("Definitions", File, std::move(Action));
}
void ClangdServer::switchSourceHeader(
PathRef Path, Callback<llvm::Optional<clangd::Path>> CB) {
// We want to return the result as fast as possible, strategy is:
// 1) use the file-only heuristic, it requires some IO but it is much
// faster than building AST, but it only works when .h/.cc files are in
// the same directory.
// 2) if 1) fails, we use the AST&Index approach, it is slower but supports
// different code layout.
if (auto CorrespondingFile = getCorrespondingHeaderOrSource(
std::string(Path), FSProvider.getFileSystem()))
return CB(std::move(CorrespondingFile));
auto Action = [Path = Path.str(), CB = std::move(CB),
this](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(getCorrespondingHeaderOrSource(Path, InpAST->AST, Index));
};
WorkScheduler.runWithAST("SwitchHeaderSource", Path, std::move(Action));
}
llvm::Expected<tooling::Replacements>
ClangdServer::formatCode(llvm::StringRef Code, PathRef File,
llvm::ArrayRef<tooling::Range> Ranges) {
// Call clang-format.
format::FormatStyle Style =
getFormatStyleForFile(File, Code, FSProvider.getFileSystem().get());
tooling::Replacements IncludeReplaces =
format::sortIncludes(Style, Code, Ranges, File);
auto Changed = tooling::applyAllReplacements(Code, IncludeReplaces);
if (!Changed)
return Changed.takeError();
return IncludeReplaces.merge(format::reformat(
Style, *Changed,
tooling::calculateRangesAfterReplacements(IncludeReplaces, Ranges),
File));
}
void ClangdServer::findDocumentHighlights(
PathRef File, Position Pos, Callback<std::vector<DocumentHighlight>> CB) {
auto Action =
[Pos, CB = std::move(CB)](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::findDocumentHighlights(InpAST->AST, Pos));
};
WorkScheduler.runWithAST("Highlights", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
void ClangdServer::findHover(PathRef File, Position Pos,
Callback<llvm::Optional<HoverInfo>> CB) {
auto Action = [File = File.str(), Pos, CB = std::move(CB),
this](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
format::FormatStyle Style = getFormatStyleForFile(
File, InpAST->Inputs.Contents, InpAST->Inputs.FS.get());
CB(clangd::getHover(InpAST->AST, Pos, std::move(Style), Index));
};
WorkScheduler.runWithAST("Hover", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
void ClangdServer::typeHierarchy(PathRef File, Position Pos, int Resolve,
TypeHierarchyDirection Direction,
Callback<Optional<TypeHierarchyItem>> CB) {
auto Action = [File = File.str(), Pos, Resolve, Direction, CB = std::move(CB),
this](Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::getTypeHierarchy(InpAST->AST, Pos, Resolve, Direction, Index,
File));
};
WorkScheduler.runWithAST("Type Hierarchy", File, std::move(Action));
}
void ClangdServer::resolveTypeHierarchy(
TypeHierarchyItem Item, int Resolve, TypeHierarchyDirection Direction,
Callback<llvm::Optional<TypeHierarchyItem>> CB) {
clangd::resolveTypeHierarchy(Item, Resolve, Direction, Index);
CB(Item);
}
void ClangdServer::onFileEvent(const DidChangeWatchedFilesParams &Params) {
// FIXME: Do nothing for now. This will be used for indexing and potentially
// invalidating other caches.
}
void ClangdServer::workspaceSymbols(
llvm::StringRef Query, int Limit,
Callback<std::vector<SymbolInformation>> CB) {
WorkScheduler.run(
"getWorkspaceSymbols",
[Query = Query.str(), Limit, CB = std::move(CB), this]() mutable {
CB(clangd::getWorkspaceSymbols(Query, Limit, Index,
WorkspaceRoot.getValueOr("")));
});
}
void ClangdServer::documentSymbols(llvm::StringRef File,
Callback<std::vector<DocumentSymbol>> CB) {
auto Action =
[CB = std::move(CB)](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::getDocumentSymbols(InpAST->AST));
};
WorkScheduler.runWithAST("documentSymbols", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
void ClangdServer::findReferences(PathRef File, Position Pos, uint32_t Limit,
Callback<ReferencesResult> CB) {
auto Action = [Pos, Limit, CB = std::move(CB),
this](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::findReferences(InpAST->AST, Pos, Limit, Index));
};
WorkScheduler.runWithAST("References", File, std::move(Action));
}
void ClangdServer::symbolInfo(PathRef File, Position Pos,
Callback<std::vector<SymbolDetails>> CB) {
auto Action =
[Pos, CB = std::move(CB)](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::getSymbolInfo(InpAST->AST, Pos));
};
WorkScheduler.runWithAST("SymbolInfo", File, std::move(Action));
}
void ClangdServer::semanticRanges(PathRef File,
const std::vector<Position> &Positions,
Callback<std::vector<SelectionRange>> CB) {
auto Action = [Positions, CB = std::move(CB)](
llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
std::vector<SelectionRange> Result;
for (const auto &Pos : Positions) {
if (auto Range = clangd::getSemanticRanges(InpAST->AST, Pos))
Result.push_back(std::move(*Range));
else
return CB(Range.takeError());
}
CB(std::move(Result));
};
WorkScheduler.runWithAST("SemanticRanges", File, std::move(Action));
}
void ClangdServer::documentLinks(PathRef File,
Callback<std::vector<DocumentLink>> CB) {
auto Action =
[CB = std::move(CB)](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::getDocumentLinks(InpAST->AST));
};
WorkScheduler.runWithAST("DocumentLinks", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
void ClangdServer::semanticHighlights(
PathRef File, Callback<std::vector<HighlightingToken>> CB) {
auto Action =
[CB = std::move(CB)](llvm::Expected<InputsAndAST> InpAST) mutable {
if (!InpAST)
return CB(InpAST.takeError());
CB(clangd::getSemanticHighlightings(InpAST->AST));
};
WorkScheduler.runWithAST("SemanticHighlights", File, std::move(Action),
TUScheduler::InvalidateOnUpdate);
}
llvm::StringMap<TUScheduler::FileStats> ClangdServer::fileStats() const {
return WorkScheduler.fileStats();
}
LLVM_NODISCARD bool
ClangdServer::blockUntilIdleForTest(llvm::Optional<double> TimeoutSeconds) {
return WorkScheduler.blockUntilIdle(timeoutSeconds(TimeoutSeconds)) &&
(!BackgroundIdx ||
BackgroundIdx->blockUntilIdleForTest(TimeoutSeconds));
}
} // namespace clangd
} // namespace clang
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