83 lines · cpp
1//===-- Highlighter.cpp ---------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "lldb/Core/Highlighter.h"10 11#include "lldb/Target/Language.h"12#include "lldb/Utility/AnsiTerminal.h"13#include "lldb/Utility/StreamString.h"14#include <optional>15 16using namespace lldb_private;17using namespace lldb_private::ansi;18 19void HighlightStyle::ColorStyle::Apply(Stream &s, llvm::StringRef value) const {20 s << m_prefix << value << m_suffix;21}22 23void HighlightStyle::ColorStyle::Set(llvm::StringRef prefix,24 llvm::StringRef suffix) {25 m_prefix = FormatAnsiTerminalCodes(prefix);26 m_suffix = FormatAnsiTerminalCodes(suffix);27}28 29void DefaultHighlighter::Highlight(const HighlightStyle &options,30 llvm::StringRef line,31 std::optional<size_t> cursor_pos,32 llvm::StringRef previous_lines,33 Stream &s) const {34 // If we don't have a valid cursor, then we just print the line as-is.35 if (!cursor_pos || *cursor_pos >= line.size()) {36 s << line;37 return;38 }39 40 // If we have a valid cursor, we have to apply the 'selected' style around41 // the character below the cursor.42 43 // Split the line around the character which is below the cursor.44 size_t column = *cursor_pos;45 // Print the characters before the cursor.46 s << line.substr(0, column);47 // Print the selected character with the defined color codes.48 options.selected.Apply(s, line.substr(column, 1));49 // Print the rest of the line.50 s << line.substr(column + 1U);51}52 53static HighlightStyle::ColorStyle GetColor(const char *c) {54 return HighlightStyle::ColorStyle(c, "${ansi.normal}");55}56 57HighlightStyle HighlightStyle::MakeVimStyle() {58 HighlightStyle result;59 result.comment = GetColor("${ansi.fg.purple}");60 result.scalar_literal = GetColor("${ansi.fg.red}");61 result.keyword = GetColor("${ansi.fg.green}");62 return result;63}64 65const Highlighter &66HighlighterManager::getHighlighterFor(lldb::LanguageType language_type,67 llvm::StringRef path) const {68 Language *language = lldb_private::Language::FindPlugin(language_type, path);69 if (language && language->GetHighlighter())70 return *language->GetHighlighter();71 return m_default;72}73 74std::string Highlighter::Highlight(const HighlightStyle &options,75 llvm::StringRef line,76 std::optional<size_t> cursor_pos,77 llvm::StringRef previous_lines) const {78 StreamString s;79 Highlight(options, line, cursor_pos, previous_lines, s);80 s.Flush();81 return s.GetString().str();82}83