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71 lines
2.3 KiB
71 lines
2.3 KiB
//===--- DraftStore.h - File contents container -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_DRAFTSTORE_H
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#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_DRAFTSTORE_H
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#include "Protocol.h"
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#include "support/Path.h"
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#include "clang/Basic/LLVM.h"
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#include "llvm/ADT/StringMap.h"
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#include <mutex>
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#include <string>
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#include <vector>
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namespace clang {
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namespace clangd {
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/// A thread-safe container for files opened in a workspace, addressed by
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/// filenames. The contents are owned by the DraftStore. This class supports
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/// both whole and incremental updates of the documents.
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/// Each time a draft is updated, it is assigned a version number. This can be
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/// specified by the caller or incremented from the previous version.
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class DraftStore {
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public:
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struct Draft {
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std::string Contents;
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int64_t Version = -1;
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};
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/// \return Contents of the stored document.
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/// For untracked files, a llvm::None is returned.
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llvm::Optional<Draft> getDraft(PathRef File) const;
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/// \return List of names of the drafts in this store.
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std::vector<Path> getActiveFiles() const;
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/// Replace contents of the draft for \p File with \p Contents.
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/// If no version is specified, one will be automatically assigned.
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/// Returns the version.
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int64_t addDraft(PathRef File, llvm::Optional<int64_t> Version,
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StringRef Contents);
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/// Update the contents of the draft for \p File based on \p Changes.
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/// If a position in \p Changes is invalid (e.g. out-of-range), the
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/// draft is not modified.
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/// If no version is specified, one will be automatically assigned.
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///
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/// \return The new version of the draft for \p File, or an error if the
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/// changes couldn't be applied.
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llvm::Expected<Draft>
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updateDraft(PathRef File, llvm::Optional<int64_t> Version,
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llvm::ArrayRef<TextDocumentContentChangeEvent> Changes);
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/// Remove the draft from the store.
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void removeDraft(PathRef File);
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private:
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mutable std::mutex Mutex;
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llvm::StringMap<Draft> Drafts;
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};
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} // namespace clangd
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} // namespace clang
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#endif
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