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//===-- Highlighter.cpp ---------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "lldb/Core/Highlighter.h"
#include "lldb/Target/Language.h"
#include "lldb/Utility/AnsiTerminal.h"
#include "lldb/Utility/StreamString.h"
#include <optional>
using namespace lldb_private;
using namespace lldb_private::ansi;
void HighlightStyle::ColorStyle::Apply(Stream &s, llvm::StringRef value) const {
s << m_prefix << value << m_suffix;
}
void HighlightStyle::ColorStyle::Set(llvm::StringRef prefix,
llvm::StringRef suffix) {
m_prefix = FormatAnsiTerminalCodes(prefix);
m_suffix = FormatAnsiTerminalCodes(suffix);
}
void DefaultHighlighter::Highlight(const HighlightStyle &options,
llvm::StringRef line,
std::optional<size_t> cursor_pos,
llvm::StringRef previous_lines,
Stream &s) const {
// If we don't have a valid cursor, then we just print the line as-is.
if (!cursor_pos || *cursor_pos >= line.size()) {
s << line;
return;
}
// If we have a valid cursor, we have to apply the 'selected' style around
// the character below the cursor.
// Split the line around the character which is below the cursor.
size_t column = *cursor_pos;
// Print the characters before the cursor.
s << line.substr(0, column);
// Print the selected character with the defined color codes.
options.selected.Apply(s, line.substr(column, 1));
// Print the rest of the line.
s << line.substr(column + 1U);
}
static HighlightStyle::ColorStyle GetColor(const char *c) {
return HighlightStyle::ColorStyle(c, "${ansi.normal}");
}
HighlightStyle HighlightStyle::MakeVimStyle() {
HighlightStyle result;
result.comment = GetColor("${ansi.fg.purple}");
result.scalar_literal = GetColor("${ansi.fg.red}");
result.keyword = GetColor("${ansi.fg.green}");
return result;
}
const Highlighter &
HighlighterManager::getHighlighterFor(lldb::LanguageType language_type,
llvm::StringRef path) const {
Language *language = lldb_private::Language::FindPlugin(language_type, path);
if (language && language->GetHighlighter())
return *language->GetHighlighter();
return m_default;
}
std::string Highlighter::Highlight(const HighlightStyle &options,
llvm::StringRef line,
std::optional<size_t> cursor_pos,
llvm::StringRef previous_lines) const {
StreamString s;
Highlight(options, line, cursor_pos, previous_lines, s);
s.Flush();
return s.GetString().str();
}
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