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https://github.com/carbon-language/carbon-lang.git
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a881e21432
The language server is now able to subscribe to and apply incremental changes to the document. Source code is assumed to be utf-8. It does not currently handle utf-16 code points. --------- Co-authored-by: Carbon Infra Bot <carbon-external-infra@google.com> Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
92 lines
3.1 KiB
C++
92 lines
3.1 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_TOOLCHAIN_LANGUAGE_SERVER_CONTEXT_H_
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#define CARBON_TOOLCHAIN_LANGUAGE_SERVER_CONTEXT_H_
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#include <memory>
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#include <string>
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#include "clang-tools-extra/clangd/LSPBinder.h"
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#include "common/map.h"
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#include "toolchain/base/shared_value_stores.h"
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#include "toolchain/diagnostics/diagnostic_consumer.h"
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#include "toolchain/diagnostics/diagnostic_emitter.h"
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#include "toolchain/diagnostics/file_diagnostics.h"
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#include "toolchain/lex/tokenized_buffer.h"
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#include "toolchain/parse/tree_and_subtrees.h"
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#include "toolchain/sem_ir/file.h"
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#include "toolchain/source/source_buffer.h"
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namespace Carbon::LanguageServer {
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// Context for LSP call handling.
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class Context {
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public:
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// Cached information for an open file.
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class File {
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public:
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explicit File(clang::clangd::URIForFile uri) : uri_(std::move(uri)) {}
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// Changes the file's text, updating dependent state.
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auto SetText(Context& context, std::optional<int64_t> version,
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llvm::StringRef text) -> void;
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auto text() const -> llvm::StringRef { return source_->text(); }
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auto tree_and_subtrees() const -> const Parse::TreeAndSubtrees& {
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return *tree_and_subtrees_;
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}
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private:
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// The filename, stable across instances.
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clang::clangd::URIForFile uri_;
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// Current file content, and derived values.
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std::unique_ptr<SourceBuffer> source_;
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std::unique_ptr<SharedValueStores> value_stores_;
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std::unique_ptr<Lex::TokenizedBuffer> tokens_;
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std::unique_ptr<Parse::Tree> tree_;
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std::unique_ptr<Parse::TreeAndSubtrees> tree_and_subtrees_;
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};
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// `vlog_stream` is optional; other parameters are required.
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explicit Context(llvm::raw_ostream* vlog_stream, DiagnosticConsumer* consumer,
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clang::clangd::LSPBinder::RawOutgoing* outgoing)
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: vlog_stream_(vlog_stream),
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file_emitter_(consumer),
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no_loc_emitter_(consumer),
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outgoing_(outgoing) {}
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// Returns a reference to the file if it's known, or diagnoses and returns
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// null.
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auto LookupFile(llvm::StringRef filename) -> File*;
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// Wrapper for LSP notification.
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auto PublishDiagnostics(clang::clangd::PublishDiagnosticsParams params)
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-> void {
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outgoing_->notify("textDocument/publishDiagnostics", params);
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}
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auto vlog_stream() -> llvm::raw_ostream* { return vlog_stream_; }
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auto file_emitter() -> FileDiagnosticEmitter& { return file_emitter_; }
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auto no_loc_emitter() -> NoLocDiagnosticEmitter& { return no_loc_emitter_; }
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auto files() -> Map<std::string, File>& { return files_; }
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private:
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// Diagnostic and output streams.
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llvm::raw_ostream* vlog_stream_;
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FileDiagnosticEmitter file_emitter_;
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NoLocDiagnosticEmitter no_loc_emitter_;
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clang::clangd::LSPBinder::RawOutgoing* outgoing_;
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// Content of files managed by the language client.
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Map<std::string, File> files_;
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};
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} // namespace Carbon::LanguageServer
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#endif // CARBON_TOOLCHAIN_LANGUAGE_SERVER_CONTEXT_H_
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