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-exception 6 // 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 15 using namespace lldb_private; 16 using namespace lldb_private::ansi; 17 18 void HighlightStyle::ColorStyle::Apply(Stream &s, llvm::StringRef value) const { 19 s << m_prefix << value << m_suffix; 20 } 21 22 void HighlightStyle::ColorStyle::Set(llvm::StringRef prefix, 23 llvm::StringRef suffix) { 24 m_prefix = FormatAnsiTerminalCodes(prefix); 25 m_suffix = FormatAnsiTerminalCodes(suffix); 26 } 27 28 void DefaultHighlighter::Highlight(const HighlightStyle &options, 29 llvm::StringRef line, 30 llvm::Optional<size_t> cursor_pos, 31 llvm::StringRef previous_lines, 32 Stream &s) const { 33 // If we don't have a valid cursor, then we just print the line as-is. 34 if (!cursor_pos || *cursor_pos >= line.size()) { 35 s << line; 36 return; 37 } 38 39 // If we have a valid cursor, we have to apply the 'selected' style around 40 // the character below the cursor. 41 42 // Split the line around the character which is below the cursor. 43 size_t column = *cursor_pos; 44 // Print the characters before the cursor. 45 s << line.substr(0, column); 46 // Print the selected character with the defined color codes. 47 options.selected.Apply(s, line.substr(column, 1)); 48 // Print the rest of the line. 49 s << line.substr(column + 1U); 50 } 51 52 static HighlightStyle::ColorStyle GetColor(const char *c) { 53 return HighlightStyle::ColorStyle(c, "${ansi.normal}"); 54 } 55 56 HighlightStyle HighlightStyle::MakeVimStyle() { 57 HighlightStyle result; 58 result.comment = GetColor("${ansi.fg.purple}"); 59 result.scalar_literal = GetColor("${ansi.fg.red}"); 60 result.keyword = GetColor("${ansi.fg.green}"); 61 return result; 62 } 63 64 const Highlighter & 65 HighlighterManager::getHighlighterFor(lldb::LanguageType language_type, 66 llvm::StringRef path) const { 67 Language *language = lldb_private::Language::FindPlugin(language_type, path); 68 if (language && language->GetHighlighter()) 69 return *language->GetHighlighter(); 70 return m_default; 71 } 72 73 std::string Highlighter::Highlight(const HighlightStyle &options, 74 llvm::StringRef line, 75 llvm::Optional<size_t> cursor_pos, 76 llvm::StringRef previous_lines) const { 77 StreamString s; 78 Highlight(options, line, cursor_pos, previous_lines, s); 79 s.Flush(); 80 return s.GetString().str(); 81 } 82