forked from OSchip/llvm-project
86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
//==-- SemanticHighlighting.h - Generating highlights from the AST-- 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// An implementation of semantic highlighting based on this proposal:
|
|
// https://github.com/microsoft/vscode-languageserver-node/pull/367 in clangd.
|
|
// Semantic highlightings are calculated for an AST by visiting every AST node
|
|
// and classifying nodes that are interesting to highlight (variables/function
|
|
// calls etc.).
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_SEMANTICHIGHLIGHTING_H
|
|
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_SEMANTICHIGHLIGHTING_H
|
|
|
|
#include "ClangdUnit.h"
|
|
#include "Protocol.h"
|
|
|
|
namespace clang {
|
|
namespace clangd {
|
|
|
|
enum class HighlightingKind {
|
|
Variable = 0,
|
|
Function,
|
|
Method,
|
|
Field,
|
|
Class,
|
|
Enum,
|
|
EnumConstant,
|
|
Namespace,
|
|
TemplateParameter,
|
|
|
|
NumKinds,
|
|
};
|
|
|
|
// Contains all information needed for the highlighting a token.
|
|
struct HighlightingToken {
|
|
HighlightingKind Kind;
|
|
Range R;
|
|
};
|
|
|
|
bool operator==(const HighlightingToken &L, const HighlightingToken &R);
|
|
bool operator<(const HighlightingToken &L, const HighlightingToken &R);
|
|
|
|
/// Contains all information about highlightings on a single line.
|
|
struct LineHighlightings {
|
|
int Line;
|
|
std::vector<HighlightingToken> Tokens;
|
|
};
|
|
|
|
bool operator==(const LineHighlightings &L, const LineHighlightings &R);
|
|
|
|
// Returns all HighlightingTokens from an AST. Only generates highlights for the
|
|
// main AST.
|
|
std::vector<HighlightingToken> getSemanticHighlightings(ParsedAST &AST);
|
|
|
|
/// Converts a HighlightingKind to a corresponding TextMate scope
|
|
/// (https://manual.macromates.com/en/language_grammars).
|
|
llvm::StringRef toTextMateScope(HighlightingKind Kind);
|
|
|
|
/// Convert to LSP's semantic highlighting information.
|
|
std::vector<SemanticHighlightingInformation>
|
|
toSemanticHighlightingInformation(llvm::ArrayRef<LineHighlightings> Tokens);
|
|
|
|
/// Return a line-by-line diff between two highlightings.
|
|
/// - if the tokens on a line are the same in both hightlightings, this line is
|
|
/// omitted.
|
|
/// - if a line exists in New but not in Old the tokens on this line are
|
|
/// emitted.
|
|
/// - if a line does not exists in New but exists in Old an empty line is
|
|
/// emitted (to tell client to clear the previous highlightings on this line).
|
|
/// \p NewMaxLine is the maximum line number from the new file.
|
|
/// REQUIRED: Old and New are sorted.
|
|
std::vector<LineHighlightings>
|
|
diffHighlightings(ArrayRef<HighlightingToken> New,
|
|
ArrayRef<HighlightingToken> Old, int NewMaxLine);
|
|
|
|
} // namespace clangd
|
|
} // namespace clang
|
|
|
|
#endif
|