1 files changed, 82 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Core/Highlighter.cpp b/contrib/llvm-project/lldb/source/Core/Highlighter.cpp
new file mode 100644
index 000000000000..f49b778baba8
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Core/Highlighter.cpp
@@ -0,0 +1,82 @@
+//===-- 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();
+}