1 files changed, 4671 insertions, 0 deletions

diff --git a/contrib/llvm-project/lldb/source/Core/IOHandler.cpp b/contrib/llvm-project/lldb/source/Core/IOHandler.cpp
new file mode 100644
index 000000000000..c3c722019faa
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Core/IOHandler.cpp
@@ -0,0 +1,4671 @@
+//===-- IOHandler.cpp -------------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Core/IOHandler.h"
+
+#ifndef LLDB_DISABLE_CURSES
+#include <curses.h>
+#include <panel.h>
+#endif
+
+#if defined(__APPLE__)
+#include <deque>
+#endif
+#include <string>
+
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Host/File.h"
+#include "lldb/Utility/Predicate.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StreamString.h"
+#include "lldb/Utility/StringList.h"
+#include "lldb/lldb-forward.h"
+
+#ifndef LLDB_DISABLE_LIBEDIT
+#include "lldb/Host/Editline.h"
+#endif
+#include "lldb/Interpreter/CommandCompletions.h"
+#include "lldb/Interpreter/CommandInterpreter.h"
+#ifndef LLDB_DISABLE_CURSES
+#include "lldb/Breakpoint/BreakpointLocation.h"
+#include "lldb/Core/Module.h"
+#include "lldb/Core/ValueObject.h"
+#include "lldb/Core/ValueObjectRegister.h"
+#include "lldb/Symbol/Block.h"
+#include "lldb/Symbol/Function.h"
+#include "lldb/Symbol/Symbol.h"
+#include "lldb/Symbol/VariableList.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StackFrame.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Utility/State.h"
+#endif
+
+#include "llvm/ADT/StringRef.h"
+
+#ifdef _MSC_VER
+#include "lldb/Host/windows/windows.h"
+#endif
+
+#include <memory>
+#include <mutex>
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <locale.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <type_traits>
+
+using namespace lldb;
+using namespace lldb_private;
+
+IOHandler::IOHandler(Debugger &debugger, IOHandler::Type type)
+    : IOHandler(debugger, type,
+                StreamFileSP(), // Adopt STDIN from top input reader
+                StreamFileSP(), // Adopt STDOUT from top input reader
+                StreamFileSP(), // Adopt STDERR from top input reader
+                0,              // Flags
+                nullptr         // Shadow file recorder
+      ) {}
+
+IOHandler::IOHandler(Debugger &debugger, IOHandler::Type type,
+                     const lldb::StreamFileSP &input_sp,
+                     const lldb::StreamFileSP &output_sp,
+                     const lldb::StreamFileSP &error_sp, uint32_t flags,
+                     repro::DataRecorder *data_recorder)
+    : m_debugger(debugger), m_input_sp(input_sp), m_output_sp(output_sp),
+      m_error_sp(error_sp), m_data_recorder(data_recorder), m_popped(false),
+      m_flags(flags), m_type(type), m_user_data(nullptr), m_done(false),
+      m_active(false) {
+  // If any files are not specified, then adopt them from the top input reader.
+  if (!m_input_sp || !m_output_sp || !m_error_sp)
+    debugger.AdoptTopIOHandlerFilesIfInvalid(m_input_sp, m_output_sp,
+                                             m_error_sp);
+}
+
+IOHandler::~IOHandler() = default;
+
+int IOHandler::GetInputFD() {
+  return (m_input_sp ? m_input_sp->GetFile().GetDescriptor() : -1);
+}
+
+int IOHandler::GetOutputFD() {
+  return (m_output_sp ? m_output_sp->GetFile().GetDescriptor() : -1);
+}
+
+int IOHandler::GetErrorFD() {
+  return (m_error_sp ? m_error_sp->GetFile().GetDescriptor() : -1);
+}
+
+FILE *IOHandler::GetInputFILE() {
+  return (m_input_sp ? m_input_sp->GetFile().GetStream() : nullptr);
+}
+
+FILE *IOHandler::GetOutputFILE() {
+  return (m_output_sp ? m_output_sp->GetFile().GetStream() : nullptr);
+}
+
+FILE *IOHandler::GetErrorFILE() {
+  return (m_error_sp ? m_error_sp->GetFile().GetStream() : nullptr);
+}
+
+StreamFileSP &IOHandler::GetInputStreamFile() { return m_input_sp; }
+
+StreamFileSP &IOHandler::GetOutputStreamFile() { return m_output_sp; }
+
+StreamFileSP &IOHandler::GetErrorStreamFile() { return m_error_sp; }
+
+bool IOHandler::GetIsInteractive() {
+  return GetInputStreamFile()->GetFile().GetIsInteractive();
+}
+
+bool IOHandler::GetIsRealTerminal() {
+  return GetInputStreamFile()->GetFile().GetIsRealTerminal();
+}
+
+void IOHandler::SetPopped(bool b) { m_popped.SetValue(b, eBroadcastOnChange); }
+
+void IOHandler::WaitForPop() { m_popped.WaitForValueEqualTo(true); }
+
+void IOHandlerStack::PrintAsync(Stream *stream, const char *s, size_t len) {
+  if (stream) {
+    std::lock_guard<std::recursive_mutex> guard(m_mutex);
+    if (m_top)
+      m_top->PrintAsync(stream, s, len);
+  }
+}
+
+IOHandlerConfirm::IOHandlerConfirm(Debugger &debugger, llvm::StringRef prompt,
+                                   bool default_response)
+    : IOHandlerEditline(
+          debugger, IOHandler::Type::Confirm,
+          nullptr, // nullptr editline_name means no history loaded/saved
+          llvm::StringRef(), // No prompt
+          llvm::StringRef(), // No continuation prompt
+          false,             // Multi-line
+          false, // Don't colorize the prompt (i.e. the confirm message.)
+          0, *this, nullptr),
+      m_default_response(default_response), m_user_response(default_response) {
+  StreamString prompt_stream;
+  prompt_stream.PutCString(prompt);
+  if (m_default_response)
+    prompt_stream.Printf(": [Y/n] ");
+  else
+    prompt_stream.Printf(": [y/N] ");
+
+  SetPrompt(prompt_stream.GetString());
+}
+
+IOHandlerConfirm::~IOHandlerConfirm() = default;
+
+int IOHandlerConfirm::IOHandlerComplete(
+    IOHandler &io_handler, const char *current_line, const char *cursor,
+    const char *last_char, int skip_first_n_matches, int max_matches,
+    StringList &matches, StringList &descriptions) {
+  if (current_line == cursor) {
+    if (m_default_response) {
+      matches.AppendString("y");
+    } else {
+      matches.AppendString("n");
+    }
+  }
+  return matches.GetSize();
+}
+
+void IOHandlerConfirm::IOHandlerInputComplete(IOHandler &io_handler,
+                                              std::string &line) {
+  if (line.empty()) {
+    // User just hit enter, set the response to the default
+    m_user_response = m_default_response;
+    io_handler.SetIsDone(true);
+    return;
+  }
+
+  if (line.size() == 1) {
+    switch (line[0]) {
+    case 'y':
+    case 'Y':
+      m_user_response = true;
+      io_handler.SetIsDone(true);
+      return;
+    case 'n':
+    case 'N':
+      m_user_response = false;
+      io_handler.SetIsDone(true);
+      return;
+    default:
+      break;
+    }
+  }
+
+  if (line == "yes" || line == "YES" || line == "Yes") {
+    m_user_response = true;
+    io_handler.SetIsDone(true);
+  } else if (line == "no" || line == "NO" || line == "No") {
+    m_user_response = false;
+    io_handler.SetIsDone(true);
+  }
+}
+
+int IOHandlerDelegate::IOHandlerComplete(
+    IOHandler &io_handler, const char *current_line, const char *cursor,
+    const char *last_char, int skip_first_n_matches, int max_matches,
+    StringList &matches, StringList &descriptions) {
+  switch (m_completion) {
+  case Completion::None:
+    break;
+
+  case Completion::LLDBCommand:
+    return io_handler.GetDebugger().GetCommandInterpreter().HandleCompletion(
+        current_line, cursor, last_char, skip_first_n_matches, max_matches,
+        matches, descriptions);
+  case Completion::Expression: {
+    CompletionResult result;
+    CompletionRequest request(current_line, cursor - current_line,
+                              skip_first_n_matches, max_matches, result);
+    CommandCompletions::InvokeCommonCompletionCallbacks(
+        io_handler.GetDebugger().GetCommandInterpreter(),
+        CommandCompletions::eVariablePathCompletion, request, nullptr);
+    result.GetMatches(matches);
+    result.GetDescriptions(descriptions);
+
+    size_t num_matches = request.GetNumberOfMatches();
+    if (num_matches > 0) {
+      std::string common_prefix;
+      matches.LongestCommonPrefix(common_prefix);
+      const size_t partial_name_len = request.GetCursorArgumentPrefix().size();
+
+      // If we matched a unique single command, add a space... Only do this if
+      // the completer told us this was a complete word, however...
+      if (num_matches == 1 && request.GetWordComplete()) {
+        common_prefix.push_back(' ');
+      }
+      common_prefix.erase(0, partial_name_len);
+      matches.InsertStringAtIndex(0, std::move(common_prefix));
+    }
+    return num_matches;
+  } break;
+  }
+
+  return 0;
+}
+
+IOHandlerEditline::IOHandlerEditline(
+    Debugger &debugger, IOHandler::Type type,
+    const char *editline_name, // Used for saving history files
+    llvm::StringRef prompt, llvm::StringRef continuation_prompt,
+    bool multi_line, bool color_prompts, uint32_t line_number_start,
+    IOHandlerDelegate &delegate, repro::DataRecorder *data_recorder)
+    : IOHandlerEditline(debugger, type,
+                        StreamFileSP(), // Inherit input from top input reader
+                        StreamFileSP(), // Inherit output from top input reader
+                        StreamFileSP(), // Inherit error from top input reader
+                        0,              // Flags
+                        editline_name,  // Used for saving history files
+                        prompt, continuation_prompt, multi_line, color_prompts,
+                        line_number_start, delegate, data_recorder) {}
+
+IOHandlerEditline::IOHandlerEditline(
+    Debugger &debugger, IOHandler::Type type,
+    const lldb::StreamFileSP &input_sp, const lldb::StreamFileSP &output_sp,
+    const lldb::StreamFileSP &error_sp, uint32_t flags,
+    const char *editline_name, // Used for saving history files
+    llvm::StringRef prompt, llvm::StringRef continuation_prompt,
+    bool multi_line, bool color_prompts, uint32_t line_number_start,
+    IOHandlerDelegate &delegate, repro::DataRecorder *data_recorder)
+    : IOHandler(debugger, type, input_sp, output_sp, error_sp, flags,
+                data_recorder),
+#ifndef LLDB_DISABLE_LIBEDIT
+      m_editline_up(),
+#endif
+      m_delegate(delegate), m_prompt(), m_continuation_prompt(),
+      m_current_lines_ptr(nullptr), m_base_line_number(line_number_start),
+      m_curr_line_idx(UINT32_MAX), m_multi_line(multi_line),
+      m_color_prompts(color_prompts), m_interrupt_exits(true),
+      m_editing(false) {
+  SetPrompt(prompt);
+
+#ifndef LLDB_DISABLE_LIBEDIT
+  bool use_editline = false;
+
+  use_editline = m_input_sp->GetFile().GetIsRealTerminal();
+
+  if (use_editline) {
+    m_editline_up.reset(new Editline(editline_name, GetInputFILE(),
+                                     GetOutputFILE(), GetErrorFILE(),
+                                     m_color_prompts));
+    m_editline_up->SetIsInputCompleteCallback(IsInputCompleteCallback, this);
+    m_editline_up->SetAutoCompleteCallback(AutoCompleteCallback, this);
+    // See if the delegate supports fixing indentation
+    const char *indent_chars = delegate.IOHandlerGetFixIndentationCharacters();
+    if (indent_chars) {
+      // The delegate does support indentation, hook it up so when any
+      // indentation character is typed, the delegate gets a chance to fix it
+      m_editline_up->SetFixIndentationCallback(FixIndentationCallback, this,
+                                               indent_chars);
+    }
+  }
+#endif
+  SetBaseLineNumber(m_base_line_number);
+  SetPrompt(prompt);
+  SetContinuationPrompt(continuation_prompt);
+}
+
+IOHandlerEditline::~IOHandlerEditline() {
+#ifndef LLDB_DISABLE_LIBEDIT
+  m_editline_up.reset();
+#endif
+}
+
+void IOHandlerEditline::Activate() {
+  IOHandler::Activate();
+  m_delegate.IOHandlerActivated(*this, GetIsInteractive());
+}
+
+void IOHandlerEditline::Deactivate() {
+  IOHandler::Deactivate();
+  m_delegate.IOHandlerDeactivated(*this);
+}
+
+bool IOHandlerEditline::GetLine(std::string &line, bool &interrupted) {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up) {
+    bool b = m_editline_up->GetLine(line, interrupted);
+    if (m_data_recorder)
+      m_data_recorder->Record(line, true);
+    return b;
+  } else {
+#endif
+    line.clear();
+
+    FILE *in = GetInputFILE();
+    if (in) {
+      if (GetIsInteractive()) {
+        const char *prompt = nullptr;
+
+        if (m_multi_line && m_curr_line_idx > 0)
+          prompt = GetContinuationPrompt();
+
+        if (prompt == nullptr)
+          prompt = GetPrompt();
+
+        if (prompt && prompt[0]) {
+          FILE *out = GetOutputFILE();
+          if (out) {
+            ::fprintf(out, "%s", prompt);
+            ::fflush(out);
+          }
+        }
+      }
+      char buffer[256];
+      bool done = false;
+      bool got_line = false;
+      m_editing = true;
+      while (!done) {
+#ifdef _WIN32
+        // ReadFile on Windows is supposed to set ERROR_OPERATION_ABORTED
+        // according to the docs on MSDN. However, this has evidently been a
+        // known bug since Windows 8. Therefore, we can't detect if a signal
+        // interrupted in the fgets. So pressing ctrl-c causes the repl to end
+        // and the process to exit. A temporary workaround is just to attempt to
+        // fgets twice until this bug is fixed.
+        if (fgets(buffer, sizeof(buffer), in) == nullptr &&
+            fgets(buffer, sizeof(buffer), in) == nullptr) {
+#else
+        if (fgets(buffer, sizeof(buffer), in) == nullptr) {
+#endif
+          const int saved_errno = errno;
+          if (feof(in))
+            done = true;
+          else if (ferror(in)) {
+            if (saved_errno != EINTR)
+              done = true;
+          }
+        } else {
+          got_line = true;
+          size_t buffer_len = strlen(buffer);
+          assert(buffer[buffer_len] == '\0');
+          char last_char = buffer[buffer_len - 1];
+          if (last_char == '\r' || last_char == '\n') {
+            done = true;
+            // Strip trailing newlines
+            while (last_char == '\r' || last_char == '\n') {
+              --buffer_len;
+              if (buffer_len == 0)
+                break;
+              last_char = buffer[buffer_len - 1];
+            }
+          }
+          line.append(buffer, buffer_len);
+        }
+      }
+      m_editing = false;
+      if (m_data_recorder && got_line)
+        m_data_recorder->Record(line, true);
+      // We might have gotten a newline on a line by itself make sure to return
+      // true in this case.
+      return got_line;
+    } else {
+      // No more input file, we are done...
+      SetIsDone(true);
+    }
+    return false;
+#ifndef LLDB_DISABLE_LIBEDIT
+  }
+#endif
+}
+
+#ifndef LLDB_DISABLE_LIBEDIT
+bool IOHandlerEditline::IsInputCompleteCallback(Editline *editline,
+                                                StringList &lines,
+                                                void *baton) {
+  IOHandlerEditline *editline_reader = (IOHandlerEditline *)baton;
+  return editline_reader->m_delegate.IOHandlerIsInputComplete(*editline_reader,
+                                                              lines);
+}
+
+int IOHandlerEditline::FixIndentationCallback(Editline *editline,
+                                              const StringList &lines,
+                                              int cursor_position,
+                                              void *baton) {
+  IOHandlerEditline *editline_reader = (IOHandlerEditline *)baton;
+  return editline_reader->m_delegate.IOHandlerFixIndentation(
+      *editline_reader, lines, cursor_position);
+}
+
+int IOHandlerEditline::AutoCompleteCallback(
+    const char *current_line, const char *cursor, const char *last_char,
+    int skip_first_n_matches, int max_matches, StringList &matches,
+    StringList &descriptions, void *baton) {
+  IOHandlerEditline *editline_reader = (IOHandlerEditline *)baton;
+  if (editline_reader)
+    return editline_reader->m_delegate.IOHandlerComplete(
+        *editline_reader, current_line, cursor, last_char, skip_first_n_matches,
+        max_matches, matches, descriptions);
+  return 0;
+}
+#endif
+
+const char *IOHandlerEditline::GetPrompt() {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up) {
+    return m_editline_up->GetPrompt();
+  } else {
+#endif
+    if (m_prompt.empty())
+      return nullptr;
+#ifndef LLDB_DISABLE_LIBEDIT
+  }
+#endif
+  return m_prompt.c_str();
+}
+
+bool IOHandlerEditline::SetPrompt(llvm::StringRef prompt) {
+  m_prompt = prompt;
+
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    m_editline_up->SetPrompt(m_prompt.empty() ? nullptr : m_prompt.c_str());
+#endif
+  return true;
+}
+
+const char *IOHandlerEditline::GetContinuationPrompt() {
+  return (m_continuation_prompt.empty() ? nullptr
+                                        : m_continuation_prompt.c_str());
+}
+
+void IOHandlerEditline::SetContinuationPrompt(llvm::StringRef prompt) {
+  m_continuation_prompt = prompt;
+
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    m_editline_up->SetContinuationPrompt(m_continuation_prompt.empty()
+                                             ? nullptr
+                                             : m_continuation_prompt.c_str());
+#endif
+}
+
+void IOHandlerEditline::SetBaseLineNumber(uint32_t line) {
+  m_base_line_number = line;
+}
+
+uint32_t IOHandlerEditline::GetCurrentLineIndex() const {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    return m_editline_up->GetCurrentLine();
+#endif
+  return m_curr_line_idx;
+}
+
+bool IOHandlerEditline::GetLines(StringList &lines, bool &interrupted) {
+  m_current_lines_ptr = &lines;
+
+  bool success = false;
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up) {
+    return m_editline_up->GetLines(m_base_line_number, lines, interrupted);
+  } else {
+#endif
+    bool done = false;
+    Status error;
+
+    while (!done) {
+      // Show line numbers if we are asked to
+      std::string line;
+      if (m_base_line_number > 0 && GetIsInteractive()) {
+        FILE *out = GetOutputFILE();
+        if (out)
+          ::fprintf(out, "%u%s", m_base_line_number + (uint32_t)lines.GetSize(),
+                    GetPrompt() == nullptr ? " " : "");
+      }
+
+      m_curr_line_idx = lines.GetSize();
+
+      bool interrupted = false;
+      if (GetLine(line, interrupted) && !interrupted) {
+        lines.AppendString(line);
+        done = m_delegate.IOHandlerIsInputComplete(*this, lines);
+      } else {
+        done = true;
+      }
+    }
+    success = lines.GetSize() > 0;
+#ifndef LLDB_DISABLE_LIBEDIT
+  }
+#endif
+  return success;
+}
+
+// Each IOHandler gets to run until it is done. It should read data from the
+// "in" and place output into "out" and "err and return when done.
+void IOHandlerEditline::Run() {
+  std::string line;
+  while (IsActive()) {
+    bool interrupted = false;
+    if (m_multi_line) {
+      StringList lines;
+      if (GetLines(lines, interrupted)) {
+        if (interrupted) {
+          m_done = m_interrupt_exits;
+          m_delegate.IOHandlerInputInterrupted(*this, line);
+
+        } else {
+          line = lines.CopyList();
+          m_delegate.IOHandlerInputComplete(*this, line);
+        }
+      } else {
+        m_done = true;
+      }
+    } else {
+      if (GetLine(line, interrupted)) {
+        if (interrupted)
+          m_delegate.IOHandlerInputInterrupted(*this, line);
+        else
+          m_delegate.IOHandlerInputComplete(*this, line);
+      } else {
+        m_done = true;
+      }
+    }
+  }
+}
+
+void IOHandlerEditline::Cancel() {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    m_editline_up->Cancel();
+#endif
+}
+
+bool IOHandlerEditline::Interrupt() {
+  // Let the delgate handle it first
+  if (m_delegate.IOHandlerInterrupt(*this))
+    return true;
+
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    return m_editline_up->Interrupt();
+#endif
+  return false;
+}
+
+void IOHandlerEditline::GotEOF() {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    m_editline_up->Interrupt();
+#endif
+}
+
+void IOHandlerEditline::PrintAsync(Stream *stream, const char *s, size_t len) {
+#ifndef LLDB_DISABLE_LIBEDIT
+  if (m_editline_up)
+    m_editline_up->PrintAsync(stream, s, len);
+  else
+#endif
+  {
+#ifdef _MSC_VER
+    const char *prompt = GetPrompt();
+    if (prompt) {
+      // Back up over previous prompt using Windows API
+      CONSOLE_SCREEN_BUFFER_INFO screen_buffer_info;
+      HANDLE console_handle = GetStdHandle(STD_OUTPUT_HANDLE);
+      GetConsoleScreenBufferInfo(console_handle, &screen_buffer_info);
+      COORD coord = screen_buffer_info.dwCursorPosition;
+      coord.X -= strlen(prompt);
+      if (coord.X < 0)
+        coord.X = 0;
+      SetConsoleCursorPosition(console_handle, coord);
+    }
+#endif
+    IOHandler::PrintAsync(stream, s, len);
+#ifdef _MSC_VER
+    if (prompt)
+      IOHandler::PrintAsync(GetOutputStreamFile().get(), prompt,
+                            strlen(prompt));
+#endif
+  }
+}
+
+// we may want curses to be disabled for some builds for instance, windows
+#ifndef LLDB_DISABLE_CURSES
+
+#define KEY_RETURN 10
+#define KEY_ESCAPE 27
+
+namespace curses {
+class Menu;
+class MenuDelegate;
+class Window;
+class WindowDelegate;
+typedef std::shared_ptr<Menu> MenuSP;
+typedef std::shared_ptr<MenuDelegate> MenuDelegateSP;
+typedef std::shared_ptr<Window> WindowSP;
+typedef std::shared_ptr<WindowDelegate> WindowDelegateSP;
+typedef std::vector<MenuSP> Menus;
+typedef std::vector<WindowSP> Windows;
+typedef std::vector<WindowDelegateSP> WindowDelegates;
+
+#if 0
+type summary add -s "x=${var.x}, y=${var.y}" curses::Point
+type summary add -s "w=${var.width}, h=${var.height}" curses::Size
+type summary add -s "${var.origin%S} ${var.size%S}" curses::Rect
+#endif
+
+struct Point {
+  int x;
+  int y;
+
+  Point(int _x = 0, int _y = 0) : x(_x), y(_y) {}
+
+  void Clear() {
+    x = 0;
+    y = 0;
+  }
+
+  Point &operator+=(const Point &rhs) {
+    x += rhs.x;
+    y += rhs.y;
+    return *this;
+  }
+
+  void Dump() { printf("(x=%i, y=%i)\n", x, y); }
+};
+
+bool operator==(const Point &lhs, const Point &rhs) {
+  return lhs.x == rhs.x && lhs.y == rhs.y;
+}
+
+bool operator!=(const Point &lhs, const Point &rhs) {
+  return lhs.x != rhs.x || lhs.y != rhs.y;
+}
+
+struct Size {
+  int width;
+  int height;
+  Size(int w = 0, int h = 0) : width(w), height(h) {}
+
+  void Clear() {
+    width = 0;
+    height = 0;
+  }
+
+  void Dump() { printf("(w=%i, h=%i)\n", width, height); }
+};
+
+bool operator==(const Size &lhs, const Size &rhs) {
+  return lhs.width == rhs.width && lhs.height == rhs.height;
+}
+
+bool operator!=(const Size &lhs, const Size &rhs) {
+  return lhs.width != rhs.width || lhs.height != rhs.height;
+}
+
+struct Rect {
+  Point origin;
+  Size size;
+
+  Rect() : origin(), size() {}
+
+  Rect(const Point &p, const Size &s) : origin(p), size(s) {}
+
+  void Clear() {
+    origin.Clear();
+    size.Clear();
+  }
+
+  void Dump() {
+    printf("(x=%i, y=%i), w=%i, h=%i)\n", origin.x, origin.y, size.width,
+           size.height);
+  }
+
+  void Inset(int w, int h) {
+    if (size.width > w * 2)
+      size.width -= w * 2;
+    origin.x += w;
+
+    if (size.height > h * 2)
+      size.height -= h * 2;
+    origin.y += h;
+  }
+
+  // Return a status bar rectangle which is the last line of this rectangle.
+  // This rectangle will be modified to not include the status bar area.
+  Rect MakeStatusBar() {
+    Rect status_bar;
+    if (size.height > 1) {
+      status_bar.origin.x = origin.x;
+      status_bar.origin.y = size.height;
+      status_bar.size.width = size.width;
+      status_bar.size.height = 1;
+      --size.height;
+    }
+    return status_bar;
+  }
+
+  // Return a menubar rectangle which is the first line of this rectangle. This
+  // rectangle will be modified to not include the menubar area.
+  Rect MakeMenuBar() {
+    Rect menubar;
+    if (size.height > 1) {
+      menubar.origin.x = origin.x;
+      menubar.origin.y = origin.y;
+      menubar.size.width = size.width;
+      menubar.size.height = 1;
+      ++origin.y;
+      --size.height;
+    }
+    return menubar;
+  }
+
+  void HorizontalSplitPercentage(float top_percentage, Rect &top,
+                                 Rect &bottom) const {
+    float top_height = top_percentage * size.height;
+    HorizontalSplit(top_height, top, bottom);
+  }
+
+  void HorizontalSplit(int top_height, Rect &top, Rect &bottom) const {
+    top = *this;
+    if (top_height < size.height) {
+      top.size.height = top_height;
+      bottom.origin.x = origin.x;
+      bottom.origin.y = origin.y + top.size.height;
+      bottom.size.width = size.width;
+      bottom.size.height = size.height - top.size.height;
+    } else {
+      bottom.Clear();
+    }
+  }
+
+  void VerticalSplitPercentage(float left_percentage, Rect &left,
+                               Rect &right) const {
+    float left_width = left_percentage * size.width;
+    VerticalSplit(left_width, left, right);
+  }
+
+  void VerticalSplit(int left_width, Rect &left, Rect &right) const {
+    left = *this;
+    if (left_width < size.width) {
+      left.size.width = left_width;
+      right.origin.x = origin.x + left.size.width;
+      right.origin.y = origin.y;
+      right.size.width = size.width - left.size.width;
+      right.size.height = size.height;
+    } else {
+      right.Clear();
+    }
+  }
+};
+
+bool operator==(const Rect &lhs, const Rect &rhs) {
+  return lhs.origin == rhs.origin && lhs.size == rhs.size;
+}
+
+bool operator!=(const Rect &lhs, const Rect &rhs) {
+  return lhs.origin != rhs.origin || lhs.size != rhs.size;
+}
+
+enum HandleCharResult {
+  eKeyNotHandled = 0,
+  eKeyHandled = 1,
+  eQuitApplication = 2
+};
+
+enum class MenuActionResult {
+  Handled,
+  NotHandled,
+  Quit // Exit all menus and quit
+};
+
+struct KeyHelp {
+  int ch;
+  const char *description;
+};
+
+class WindowDelegate {
+public:
+  virtual ~WindowDelegate() = default;
+
+  virtual bool WindowDelegateDraw(Window &window, bool force) {
+    return false; // Drawing not handled
+  }
+
+  virtual HandleCharResult WindowDelegateHandleChar(Window &window, int key) {
+    return eKeyNotHandled;
+  }
+
+  virtual const char *WindowDelegateGetHelpText() { return nullptr; }
+
+  virtual KeyHelp *WindowDelegateGetKeyHelp() { return nullptr; }
+};
+
+class HelpDialogDelegate : public WindowDelegate {
+public:
+  HelpDialogDelegate(const char *text, KeyHelp *key_help_array);
+
+  ~HelpDialogDelegate() override;
+
+  bool WindowDelegateDraw(Window &window, bool force) override;
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int key) override;
+
+  size_t GetNumLines() const { return m_text.GetSize(); }
+
+  size_t GetMaxLineLength() const { return m_text.GetMaxStringLength(); }
+
+protected:
+  StringList m_text;
+  int m_first_visible_line;
+};
+
+class Window {
+public:
+  Window(const char *name)
+      : m_name(name), m_window(nullptr), m_panel(nullptr), m_parent(nullptr),
+        m_subwindows(), m_delegate_sp(), m_curr_active_window_idx(UINT32_MAX),
+        m_prev_active_window_idx(UINT32_MAX), m_delete(false),
+        m_needs_update(true), m_can_activate(true), m_is_subwin(false) {}
+
+  Window(const char *name, WINDOW *w, bool del = true)
+      : m_name(name), m_window(nullptr), m_panel(nullptr), m_parent(nullptr),
+        m_subwindows(), m_delegate_sp(), m_curr_active_window_idx(UINT32_MAX),
+        m_prev_active_window_idx(UINT32_MAX), m_delete(del),
+        m_needs_update(true), m_can_activate(true), m_is_subwin(false) {
+    if (w)
+      Reset(w);
+  }
+
+  Window(const char *name, const Rect &bounds)
+      : m_name(name), m_window(nullptr), m_parent(nullptr), m_subwindows(),
+        m_delegate_sp(), m_curr_active_window_idx(UINT32_MAX),
+        m_prev_active_window_idx(UINT32_MAX), m_delete(true),
+        m_needs_update(true), m_can_activate(true), m_is_subwin(false) {
+    Reset(::newwin(bounds.size.height, bounds.size.width, bounds.origin.y,
+                   bounds.origin.y));
+  }
+
+  virtual ~Window() {
+    RemoveSubWindows();
+    Reset();
+  }
+
+  void Reset(WINDOW *w = nullptr, bool del = true) {
+    if (m_window == w)
+      return;
+
+    if (m_panel) {
+      ::del_panel(m_panel);
+      m_panel = nullptr;
+    }
+    if (m_window && m_delete) {
+      ::delwin(m_window);
+      m_window = nullptr;
+      m_delete = false;
+    }
+    if (w) {
+      m_window = w;
+      m_panel = ::new_panel(m_window);
+      m_delete = del;
+    }
+  }
+
+  void AttributeOn(attr_t attr) { ::wattron(m_window, attr); }
+  void AttributeOff(attr_t attr) { ::wattroff(m_window, attr); }
+  void Box(chtype v_char = ACS_VLINE, chtype h_char = ACS_HLINE) {
+    ::box(m_window, v_char, h_char);
+  }
+  void Clear() { ::wclear(m_window); }
+  void Erase() { ::werase(m_window); }
+  Rect GetBounds() {
+    return Rect(GetParentOrigin(), GetSize());
+  } // Get the rectangle in our parent window
+  int GetChar() { return ::wgetch(m_window); }
+  int GetCursorX() { return getcurx(m_window); }
+  int GetCursorY() { return getcury(m_window); }
+  Rect GetFrame() {
+    return Rect(Point(), GetSize());
+  } // Get our rectangle in our own coordinate system
+  Point GetParentOrigin() { return Point(GetParentX(), GetParentY()); }
+  Size GetSize() { return Size(GetWidth(), GetHeight()); }
+  int GetParentX() { return getparx(m_window); }
+  int GetParentY() { return getpary(m_window); }
+  int GetMaxX() { return getmaxx(m_window); }
+  int GetMaxY() { return getmaxy(m_window); }
+  int GetWidth() { return GetMaxX(); }
+  int GetHeight() { return GetMaxY(); }
+  void MoveCursor(int x, int y) { ::wmove(m_window, y, x); }
+  void MoveWindow(int x, int y) { MoveWindow(Point(x, y)); }
+  void Resize(int w, int h) { ::wresize(m_window, h, w); }
+  void Resize(const Size &size) {
+    ::wresize(m_window, size.height, size.width);
+  }
+  void PutChar(int ch) { ::waddch(m_window, ch); }
+  void PutCString(const char *s, int len = -1) { ::waddnstr(m_window, s, len); }
+  void Refresh() { ::wrefresh(m_window); }
+  void DeferredRefresh() {
+    // We are using panels, so we don't need to call this...
+    //::wnoutrefresh(m_window);
+  }
+  void SetBackground(int color_pair_idx) {
+    ::wbkgd(m_window, COLOR_PAIR(color_pair_idx));
+  }
+  void UnderlineOn() { AttributeOn(A_UNDERLINE); }
+  void UnderlineOff() { AttributeOff(A_UNDERLINE); }
+
+  void PutCStringTruncated(const char *s, int right_pad) {
+    int bytes_left = GetWidth() - GetCursorX();
+    if (bytes_left > right_pad) {
+      bytes_left -= right_pad;
+      ::waddnstr(m_window, s, bytes_left);
+    }
+  }
+
+  void MoveWindow(const Point &origin) {
+    const bool moving_window = origin != GetParentOrigin();
+    if (m_is_subwin && moving_window) {
+      // Can't move subwindows, must delete and re-create
+      Size size = GetSize();
+      Reset(::subwin(m_parent->m_window, size.height, size.width, origin.y,
+                     origin.x),
+            true);
+    } else {
+      ::mvwin(m_window, origin.y, origin.x);
+    }
+  }
+
+  void SetBounds(const Rect &bounds) {
+    const bool moving_window = bounds.origin != GetParentOrigin();
+    if (m_is_subwin && moving_window) {
+      // Can't move subwindows, must delete and re-create
+      Reset(::subwin(m_parent->m_window, bounds.size.height, bounds.size.width,
+                     bounds.origin.y, bounds.origin.x),
+            true);
+    } else {
+      if (moving_window)
+        MoveWindow(bounds.origin);
+      Resize(bounds.size);
+    }
+  }
+
+  void Printf(const char *format, ...) __attribute__((format(printf, 2, 3))) {
+    va_list args;
+    va_start(args, format);
+    vwprintw(m_window, format, args);
+    va_end(args);
+  }
+
+  void Touch() {
+    ::touchwin(m_window);
+    if (m_parent)
+      m_parent->Touch();
+  }
+
+  WindowSP CreateSubWindow(const char *name, const Rect &bounds,
+                           bool make_active) {
+    auto get_window = [this, &bounds]() {
+      return m_window
+                 ? ::subwin(m_window, bounds.size.height, bounds.size.width,
+                            bounds.origin.y, bounds.origin.x)
+                 : ::newwin(bounds.size.height, bounds.size.width,
+                            bounds.origin.y, bounds.origin.x);
+    };
+    WindowSP subwindow_sp = std::make_shared<Window>(name, get_window(), true);
+    subwindow_sp->m_is_subwin = subwindow_sp.operator bool();
+    subwindow_sp->m_parent = this;
+    if (make_active) {
+      m_prev_active_window_idx = m_curr_active_window_idx;
+      m_curr_active_window_idx = m_subwindows.size();
+    }
+    m_subwindows.push_back(subwindow_sp);
+    ::top_panel(subwindow_sp->m_panel);
+    m_needs_update = true;
+    return subwindow_sp;
+  }
+
+  bool RemoveSubWindow(Window *window) {
+    Windows::iterator pos, end = m_subwindows.end();
+    size_t i = 0;
+    for (pos = m_subwindows.begin(); pos != end; ++pos, ++i) {
+      if ((*pos).get() == window) {
+        if (m_prev_active_window_idx == i)
+          m_prev_active_window_idx = UINT32_MAX;
+        else if (m_prev_active_window_idx != UINT32_MAX &&
+                 m_prev_active_window_idx > i)
+          --m_prev_active_window_idx;
+
+        if (m_curr_active_window_idx == i)
+          m_curr_active_window_idx = UINT32_MAX;
+        else if (m_curr_active_window_idx != UINT32_MAX &&
+                 m_curr_active_window_idx > i)
+          --m_curr_active_window_idx;
+        window->Erase();
+        m_subwindows.erase(pos);
+        m_needs_update = true;
+        if (m_parent)
+          m_parent->Touch();
+        else
+          ::touchwin(stdscr);
+        return true;
+      }
+    }
+    return false;
+  }
+
+  WindowSP FindSubWindow(const char *name) {
+    Windows::iterator pos, end = m_subwindows.end();
+    size_t i = 0;
+    for (pos = m_subwindows.begin(); pos != end; ++pos, ++i) {
+      if ((*pos)->m_name == name)
+        return *pos;
+    }
+    return WindowSP();
+  }
+
+  void RemoveSubWindows() {
+    m_curr_active_window_idx = UINT32_MAX;
+    m_prev_active_window_idx = UINT32_MAX;
+    for (Windows::iterator pos = m_subwindows.begin();
+         pos != m_subwindows.end(); pos = m_subwindows.erase(pos)) {
+      (*pos)->Erase();
+    }
+    if (m_parent)
+      m_parent->Touch();
+    else
+      ::touchwin(stdscr);
+  }
+
+  WINDOW *get() { return m_window; }
+
+  operator WINDOW *() { return m_window; }
+
+  // Window drawing utilities
+  void DrawTitleBox(const char *title, const char *bottom_message = nullptr) {
+    attr_t attr = 0;
+    if (IsActive())
+      attr = A_BOLD | COLOR_PAIR(2);
+    else
+      attr = 0;
+    if (attr)
+      AttributeOn(attr);
+
+    Box();
+    MoveCursor(3, 0);
+
+    if (title && title[0]) {
+      PutChar('<');
+      PutCString(title);
+      PutChar('>');
+    }
+
+    if (bottom_message && bottom_message[0]) {
+      int bottom_message_length = strlen(bottom_message);
+      int x = GetWidth() - 3 - (bottom_message_length + 2);
+
+      if (x > 0) {
+        MoveCursor(x, GetHeight() - 1);
+        PutChar('[');
+        PutCString(bottom_message);
+        PutChar(']');
+      } else {
+        MoveCursor(1, GetHeight() - 1);
+        PutChar('[');
+        PutCStringTruncated(bottom_message, 1);
+      }
+    }
+    if (attr)
+      AttributeOff(attr);
+  }
+
+  virtual void Draw(bool force) {
+    if (m_delegate_sp && m_delegate_sp->WindowDelegateDraw(*this, force))
+      return;
+
+    for (auto &subwindow_sp : m_subwindows)
+      subwindow_sp->Draw(force);
+  }
+
+  bool CreateHelpSubwindow() {
+    if (m_delegate_sp) {
+      const char *text = m_delegate_sp->WindowDelegateGetHelpText();
+      KeyHelp *key_help = m_delegate_sp->WindowDelegateGetKeyHelp();
+      if ((text && text[0]) || key_help) {
+        std::unique_ptr<HelpDialogDelegate> help_delegate_up(
+            new HelpDialogDelegate(text, key_help));
+        const size_t num_lines = help_delegate_up->GetNumLines();
+        const size_t max_length = help_delegate_up->GetMaxLineLength();
+        Rect bounds = GetBounds();
+        bounds.Inset(1, 1);
+        if (max_length + 4 < static_cast<size_t>(bounds.size.width)) {
+          bounds.origin.x += (bounds.size.width - max_length + 4) / 2;
+          bounds.size.width = max_length + 4;
+        } else {
+          if (bounds.size.width > 100) {
+            const int inset_w = bounds.size.width / 4;
+            bounds.origin.x += inset_w;
+            bounds.size.width -= 2 * inset_w;
+          }
+        }
+
+        if (num_lines + 2 < static_cast<size_t>(bounds.size.height)) {
+          bounds.origin.y += (bounds.size.height - num_lines + 2) / 2;
+          bounds.size.height = num_lines + 2;
+        } else {
+          if (bounds.size.height > 100) {
+            const int inset_h = bounds.size.height / 4;
+            bounds.origin.y += inset_h;
+            bounds.size.height -= 2 * inset_h;
+          }
+        }
+        WindowSP help_window_sp;
+        Window *parent_window = GetParent();
+        if (parent_window)
+          help_window_sp = parent_window->CreateSubWindow("Help", bounds, true);
+        else
+          help_window_sp = CreateSubWindow("Help", bounds, true);
+        help_window_sp->SetDelegate(
+            WindowDelegateSP(help_delegate_up.release()));
+        return true;
+      }
+    }
+    return false;
+  }
+
+  virtual HandleCharResult HandleChar(int key) {
+    // Always check the active window first
+    HandleCharResult result = eKeyNotHandled;
+    WindowSP active_window_sp = GetActiveWindow();
+    if (active_window_sp) {
+      result = active_window_sp->HandleChar(key);
+      if (result != eKeyNotHandled)
+        return result;
+    }
+
+    if (m_delegate_sp) {
+      result = m_delegate_sp->WindowDelegateHandleChar(*this, key);
+      if (result != eKeyNotHandled)
+        return result;
+    }
+
+    // Then check for any windows that want any keys that weren't handled. This
+    // is typically only for a menubar. Make a copy of the subwindows in case
+    // any HandleChar() functions muck with the subwindows. If we don't do
+    // this, we can crash when iterating over the subwindows.
+    Windows subwindows(m_subwindows);
+    for (auto subwindow_sp : subwindows) {
+      if (!subwindow_sp->m_can_activate) {
+        HandleCharResult result = subwindow_sp->HandleChar(key);
+        if (result != eKeyNotHandled)
+          return result;
+      }
+    }
+
+    return eKeyNotHandled;
+  }
+
+  bool SetActiveWindow(Window *window) {
+    const size_t num_subwindows = m_subwindows.size();
+    for (size_t i = 0; i < num_subwindows; ++i) {
+      if (m_subwindows[i].get() == window) {
+        m_prev_active_window_idx = m_curr_active_window_idx;
+        ::top_panel(window->m_panel);
+        m_curr_active_window_idx = i;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  WindowSP GetActiveWindow() {
+    if (!m_subwindows.empty()) {
+      if (m_curr_active_window_idx >= m_subwindows.size()) {
+        if (m_prev_active_window_idx < m_subwindows.size()) {
+          m_curr_active_window_idx = m_prev_active_window_idx;
+          m_prev_active_window_idx = UINT32_MAX;
+        } else if (IsActive()) {
+          m_prev_active_window_idx = UINT32_MAX;
+          m_curr_active_window_idx = UINT32_MAX;
+
+          // Find first window that wants to be active if this window is active
+          const size_t num_subwindows = m_subwindows.size();
+          for (size_t i = 0; i < num_subwindows; ++i) {
+            if (m_subwindows[i]->GetCanBeActive()) {
+              m_curr_active_window_idx = i;
+              break;
+            }
+          }
+        }
+      }
+
+      if (m_curr_active_window_idx < m_subwindows.size())
+        return m_subwindows[m_curr_active_window_idx];
+    }
+    return WindowSP();
+  }
+
+  bool GetCanBeActive() const { return m_can_activate; }
+
+  void SetCanBeActive(bool b) { m_can_activate = b; }
+
+  const WindowDelegateSP &GetDelegate() const { return m_delegate_sp; }
+
+  void SetDelegate(const WindowDelegateSP &delegate_sp) {
+    m_delegate_sp = delegate_sp;
+  }
+
+  Window *GetParent() const { return m_parent; }
+
+  bool IsActive() const {
+    if (m_parent)
+      return m_parent->GetActiveWindow().get() == this;
+    else
+      return true; // Top level window is always active
+  }
+
+  void SelectNextWindowAsActive() {
+    // Move active focus to next window
+    const size_t num_subwindows = m_subwindows.size();
+    if (m_curr_active_window_idx == UINT32_MAX) {
+      uint32_t idx = 0;
+      for (auto subwindow_sp : m_subwindows) {
+        if (subwindow_sp->GetCanBeActive()) {
+          m_curr_active_window_idx = idx;
+          break;
+        }
+        ++idx;
+      }
+    } else if (m_curr_active_window_idx + 1 < num_subwindows) {
+      bool handled = false;
+      m_prev_active_window_idx = m_curr_active_window_idx;
+      for (size_t idx = m_curr_active_window_idx + 1; idx < num_subwindows;
+           ++idx) {
+        if (m_subwindows[idx]->GetCanBeActive()) {
+          m_curr_active_window_idx = idx;
+          handled = true;
+          break;
+        }
+      }
+      if (!handled) {
+        for (size_t idx = 0; idx <= m_prev_active_window_idx; ++idx) {
+          if (m_subwindows[idx]->GetCanBeActive()) {
+            m_curr_active_window_idx = idx;
+            break;
+          }
+        }
+      }
+    } else {
+      m_prev_active_window_idx = m_curr_active_window_idx;
+      for (size_t idx = 0; idx < num_subwindows; ++idx) {
+        if (m_subwindows[idx]->GetCanBeActive()) {
+          m_curr_active_window_idx = idx;
+          break;
+        }
+      }
+    }
+  }
+
+  const char *GetName() const { return m_name.c_str(); }
+
+protected:
+  std::string m_name;
+  WINDOW *m_window;
+  PANEL *m_panel;
+  Window *m_parent;
+  Windows m_subwindows;
+  WindowDelegateSP m_delegate_sp;
+  uint32_t m_curr_active_window_idx;
+  uint32_t m_prev_active_window_idx;
+  bool m_delete;
+  bool m_needs_update;
+  bool m_can_activate;
+  bool m_is_subwin;
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(Window);
+};
+
+class MenuDelegate {
+public:
+  virtual ~MenuDelegate() = default;
+
+  virtual MenuActionResult MenuDelegateAction(Menu &menu) = 0;
+};
+
+class Menu : public WindowDelegate {
+public:
+  enum class Type { Invalid, Bar, Item, Separator };
+
+  // Menubar or separator constructor
+  Menu(Type type);
+
+  // Menuitem constructor
+  Menu(const char *name, const char *key_name, int key_value,
+       uint64_t identifier);
+
+  ~Menu() override = default;
+
+  const MenuDelegateSP &GetDelegate() const { return m_delegate_sp; }
+
+  void SetDelegate(const MenuDelegateSP &delegate_sp) {
+    m_delegate_sp = delegate_sp;
+  }
+
+  void RecalculateNameLengths();
+
+  void AddSubmenu(const MenuSP &menu_sp);
+
+  int DrawAndRunMenu(Window &window);
+
+  void DrawMenuTitle(Window &window, bool highlight);
+
+  bool WindowDelegateDraw(Window &window, bool force) override;
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int key) override;
+
+  MenuActionResult ActionPrivate(Menu &menu) {
+    MenuActionResult result = MenuActionResult::NotHandled;
+    if (m_delegate_sp) {
+      result = m_delegate_sp->MenuDelegateAction(menu);
+      if (result != MenuActionResult::NotHandled)
+        return result;
+    } else if (m_parent) {
+      result = m_parent->ActionPrivate(menu);
+      if (result != MenuActionResult::NotHandled)
+        return result;
+    }
+    return m_canned_result;
+  }
+
+  MenuActionResult Action() {
+    // Call the recursive action so it can try to handle it with the menu
+    // delegate, and if not, try our parent menu
+    return ActionPrivate(*this);
+  }
+
+  void SetCannedResult(MenuActionResult result) { m_canned_result = result; }
+
+  Menus &GetSubmenus() { return m_submenus; }
+
+  const Menus &GetSubmenus() const { return m_submenus; }
+
+  int GetSelectedSubmenuIndex() const { return m_selected; }
+
+  void SetSelectedSubmenuIndex(int idx) { m_selected = idx; }
+
+  Type GetType() const { return m_type; }
+
+  int GetStartingColumn() const { return m_start_col; }
+
+  void SetStartingColumn(int col) { m_start_col = col; }
+
+  int GetKeyValue() const { return m_key_value; }
+
+  void SetKeyValue(int key_value) { m_key_value = key_value; }
+
+  std::string &GetName() { return m_name; }
+
+  std::string &GetKeyName() { return m_key_name; }
+
+  int GetDrawWidth() const {
+    return m_max_submenu_name_length + m_max_submenu_key_name_length + 8;
+  }
+
+  uint64_t GetIdentifier() const { return m_identifier; }
+
+  void SetIdentifier(uint64_t identifier) { m_identifier = identifier; }
+
+protected:
+  std::string m_name;
+  std::string m_key_name;
+  uint64_t m_identifier;
+  Type m_type;
+  int m_key_value;
+  int m_start_col;
+  int m_max_submenu_name_length;
+  int m_max_submenu_key_name_length;
+  int m_selected;
+  Menu *m_parent;
+  Menus m_submenus;
+  WindowSP m_menu_window_sp;
+  MenuActionResult m_canned_result;
+  MenuDelegateSP m_delegate_sp;
+};
+
+// Menubar or separator constructor
+Menu::Menu(Type type)
+    : m_name(), m_key_name(), m_identifier(0), m_type(type), m_key_value(0),
+      m_start_col(0), m_max_submenu_name_length(0),
+      m_max_submenu_key_name_length(0), m_selected(0), m_parent(nullptr),
+      m_submenus(), m_canned_result(MenuActionResult::NotHandled),
+      m_delegate_sp() {}
+
+// Menuitem constructor
+Menu::Menu(const char *name, const char *key_name, int key_value,
+           uint64_t identifier)
+    : m_name(), m_key_name(), m_identifier(identifier), m_type(Type::Invalid),
+      m_key_value(key_value), m_start_col(0), m_max_submenu_name_length(0),
+      m_max_submenu_key_name_length(0), m_selected(0), m_parent(nullptr),
+      m_submenus(), m_canned_result(MenuActionResult::NotHandled),
+      m_delegate_sp() {
+  if (name && name[0]) {
+    m_name = name;
+    m_type = Type::Item;
+    if (key_name && key_name[0])
+      m_key_name = key_name;
+  } else {
+    m_type = Type::Separator;
+  }
+}
+
+void Menu::RecalculateNameLengths() {
+  m_max_submenu_name_length = 0;
+  m_max_submenu_key_name_length = 0;
+  Menus &submenus = GetSubmenus();
+  const size_t num_submenus = submenus.size();
+  for (size_t i = 0; i < num_submenus; ++i) {
+    Menu *submenu = submenus[i].get();
+    if (static_cast<size_t>(m_max_submenu_name_length) < submenu->m_name.size())
+      m_max_submenu_name_length = submenu->m_name.size();
+    if (static_cast<size_t>(m_max_submenu_key_name_length) <
+        submenu->m_key_name.size())
+      m_max_submenu_key_name_length = submenu->m_key_name.size();
+  }
+}
+
+void Menu::AddSubmenu(const MenuSP &menu_sp) {
+  menu_sp->m_parent = this;
+  if (static_cast<size_t>(m_max_submenu_name_length) < menu_sp->m_name.size())
+    m_max_submenu_name_length = menu_sp->m_name.size();
+  if (static_cast<size_t>(m_max_submenu_key_name_length) <
+      menu_sp->m_key_name.size())
+    m_max_submenu_key_name_length = menu_sp->m_key_name.size();
+  m_submenus.push_back(menu_sp);
+}
+
+void Menu::DrawMenuTitle(Window &window, bool highlight) {
+  if (m_type == Type::Separator) {
+    window.MoveCursor(0, window.GetCursorY());
+    window.PutChar(ACS_LTEE);
+    int width = window.GetWidth();
+    if (width > 2) {
+      width -= 2;
+      for (int i = 0; i < width; ++i)
+        window.PutChar(ACS_HLINE);
+    }
+    window.PutChar(ACS_RTEE);
+  } else {
+    const int shortcut_key = m_key_value;
+    bool underlined_shortcut = false;
+    const attr_t hilgight_attr = A_REVERSE;
+    if (highlight)
+      window.AttributeOn(hilgight_attr);
+    if (isprint(shortcut_key)) {
+      size_t lower_pos = m_name.find(tolower(shortcut_key));
+      size_t upper_pos = m_name.find(toupper(shortcut_key));
+      const char *name = m_name.c_str();
+      size_t pos = std::min<size_t>(lower_pos, upper_pos);
+      if (pos != std::string::npos) {
+        underlined_shortcut = true;
+        if (pos > 0) {
+          window.PutCString(name, pos);
+          name += pos;
+        }
+        const attr_t shortcut_attr = A_UNDERLINE | A_BOLD;
+        window.AttributeOn(shortcut_attr);
+        window.PutChar(name[0]);
+        window.AttributeOff(shortcut_attr);
+        name++;
+        if (name[0])
+          window.PutCString(name);
+      }
+    }
+
+    if (!underlined_shortcut) {
+      window.PutCString(m_name.c_str());
+    }
+
+    if (highlight)
+      window.AttributeOff(hilgight_attr);
+
+    if (m_key_name.empty()) {
+      if (!underlined_shortcut && isprint(m_key_value)) {
+        window.AttributeOn(COLOR_PAIR(3));
+        window.Printf(" (%c)", m_key_value);
+        window.AttributeOff(COLOR_PAIR(3));
+      }
+    } else {
+      window.AttributeOn(COLOR_PAIR(3));
+      window.Printf(" (%s)", m_key_name.c_str());
+      window.AttributeOff(COLOR_PAIR(3));
+    }
+  }
+}
+
+bool Menu::WindowDelegateDraw(Window &window, bool force) {
+  Menus &submenus = GetSubmenus();
+  const size_t num_submenus = submenus.size();
+  const int selected_idx = GetSelectedSubmenuIndex();
+  Menu::Type menu_type = GetType();
+  switch (menu_type) {
+  case Menu::Type::Bar: {
+    window.SetBackground(2);
+    window.MoveCursor(0, 0);
+    for (size_t i = 0; i < num_submenus; ++i) {
+      Menu *menu = submenus[i].get();
+      if (i > 0)
+        window.PutChar(' ');
+      menu->SetStartingColumn(window.GetCursorX());
+      window.PutCString("| ");
+      menu->DrawMenuTitle(window, false);
+    }
+    window.PutCString(" |");
+    window.DeferredRefresh();
+  } break;
+
+  case Menu::Type::Item: {
+    int y = 1;
+    int x = 3;
+    // Draw the menu
+    int cursor_x = 0;
+    int cursor_y = 0;
+    window.Erase();
+    window.SetBackground(2);
+    window.Box();
+    for (size_t i = 0; i < num_submenus; ++i) {
+      const bool is_selected = (i == static_cast<size_t>(selected_idx));
+      window.MoveCursor(x, y + i);
+      if (is_selected) {
+        // Remember where we want the cursor to be
+        cursor_x = x - 1;
+        cursor_y = y + i;
+      }
+      submenus[i]->DrawMenuTitle(window, is_selected);
+    }
+    window.MoveCursor(cursor_x, cursor_y);
+    window.DeferredRefresh();
+  } break;
+
+  default:
+  case Menu::Type::Separator:
+    break;
+  }
+  return true; // Drawing handled...
+}
+
+HandleCharResult Menu::WindowDelegateHandleChar(Window &window, int key) {
+  HandleCharResult result = eKeyNotHandled;
+
+  Menus &submenus = GetSubmenus();
+  const size_t num_submenus = submenus.size();
+  const int selected_idx = GetSelectedSubmenuIndex();
+  Menu::Type menu_type = GetType();
+  if (menu_type == Menu::Type::Bar) {
+    MenuSP run_menu_sp;
+    switch (key) {
+    case KEY_DOWN:
+    case KEY_UP:
+      // Show last menu or first menu
+      if (selected_idx < static_cast<int>(num_submenus))
+        run_menu_sp = submenus[selected_idx];
+      else if (!submenus.empty())
+        run_menu_sp = submenus.front();
+      result = eKeyHandled;
+      break;
+
+    case KEY_RIGHT:
+      ++m_selected;
+      if (m_selected >= static_cast<int>(num_submenus))
+        m_selected = 0;
+      if (m_selected < static_cast<int>(num_submenus))
+        run_menu_sp = submenus[m_selected];
+      else if (!submenus.empty())
+        run_menu_sp = submenus.front();
+      result = eKeyHandled;
+      break;
+
+    case KEY_LEFT:
+      --m_selected;
+      if (m_selected < 0)
+        m_selected = num_submenus - 1;
+      if (m_selected < static_cast<int>(num_submenus))
+        run_menu_sp = submenus[m_selected];
+      else if (!submenus.empty())
+        run_menu_sp = submenus.front();
+      result = eKeyHandled;
+      break;
+
+    default:
+      for (size_t i = 0; i < num_submenus; ++i) {
+        if (submenus[i]->GetKeyValue() == key) {
+          SetSelectedSubmenuIndex(i);
+          run_menu_sp = submenus[i];
+          result = eKeyHandled;
+          break;
+        }
+      }
+      break;
+    }
+
+    if (run_menu_sp) {
+      // Run the action on this menu in case we need to populate the menu with
+      // dynamic content and also in case check marks, and any other menu
+      // decorations need to be calculated
+      if (run_menu_sp->Action() == MenuActionResult::Quit)
+        return eQuitApplication;
+
+      Rect menu_bounds;
+      menu_bounds.origin.x = run_menu_sp->GetStartingColumn();
+      menu_bounds.origin.y = 1;
+      menu_bounds.size.width = run_menu_sp->GetDrawWidth();
+      menu_bounds.size.height = run_menu_sp->GetSubmenus().size() + 2;
+      if (m_menu_window_sp)
+        window.GetParent()->RemoveSubWindow(m_menu_window_sp.get());
+
+      m_menu_window_sp = window.GetParent()->CreateSubWindow(
+          run_menu_sp->GetName().c_str(), menu_bounds, true);
+      m_menu_window_sp->SetDelegate(run_menu_sp);
+    }
+  } else if (menu_type == Menu::Type::Item) {
+    switch (key) {
+    case KEY_DOWN:
+      if (m_submenus.size() > 1) {
+        const int start_select = m_selected;
+        while (++m_selected != start_select) {
+          if (static_cast<size_t>(m_selected) >= num_submenus)
+            m_selected = 0;
+          if (m_submenus[m_selected]->GetType() == Type::Separator)
+            continue;
+          else
+            break;
+        }
+        return eKeyHandled;
+      }
+      break;
+
+    case KEY_UP:
+      if (m_submenus.size() > 1) {
+        const int start_select = m_selected;
+        while (--m_selected != start_select) {
+          if (m_selected < static_cast<int>(0))
+            m_selected = num_submenus - 1;
+          if (m_submenus[m_selected]->GetType() == Type::Separator)
+            continue;
+          else
+            break;
+        }
+        return eKeyHandled;
+      }
+      break;
+
+    case KEY_RETURN:
+      if (static_cast<size_t>(selected_idx) < num_submenus) {
+        if (submenus[selected_idx]->Action() == MenuActionResult::Quit)
+          return eQuitApplication;
+        window.GetParent()->RemoveSubWindow(&window);
+        return eKeyHandled;
+      }
+      break;
+
+    case KEY_ESCAPE: // Beware: pressing escape key has 1 to 2 second delay in
+                     // case other chars are entered for escaped sequences
+      window.GetParent()->RemoveSubWindow(&window);
+      return eKeyHandled;
+
+    default:
+      for (size_t i = 0; i < num_submenus; ++i) {
+        Menu *menu = submenus[i].get();
+        if (menu->GetKeyValue() == key) {
+          SetSelectedSubmenuIndex(i);
+          window.GetParent()->RemoveSubWindow(&window);
+          if (menu->Action() == MenuActionResult::Quit)
+            return eQuitApplication;
+          return eKeyHandled;
+        }
+      }
+      break;
+    }
+  } else if (menu_type == Menu::Type::Separator) {
+  }
+  return result;
+}
+
+class Application {
+public:
+  Application(FILE *in, FILE *out)
+      : m_window_sp(), m_screen(nullptr), m_in(in), m_out(out) {}
+
+  ~Application() {
+    m_window_delegates.clear();
+    m_window_sp.reset();
+    if (m_screen) {
+      ::delscreen(m_screen);
+      m_screen = nullptr;
+    }
+  }
+
+  void Initialize() {
+    ::setlocale(LC_ALL, "");
+    ::setlocale(LC_CTYPE, "");
+    m_screen = ::newterm(nullptr, m_out, m_in);
+    ::start_color();
+    ::curs_set(0);
+    ::noecho();
+    ::keypad(stdscr, TRUE);
+  }
+
+  void Terminate() { ::endwin(); }
+
+  void Run(Debugger &debugger) {
+    bool done = false;
+    int delay_in_tenths_of_a_second = 1;
+
+    // Alas the threading model in curses is a bit lame so we need to resort to
+    // polling every 0.5 seconds. We could poll for stdin ourselves and then
+    // pass the keys down but then we need to translate all of the escape
+    // sequences ourselves. So we resort to polling for input because we need
+    // to receive async process events while in this loop.
+
+    halfdelay(delay_in_tenths_of_a_second); // Poll using some number of tenths
+                                            // of seconds seconds when calling
+                                            // Window::GetChar()
+
+    ListenerSP listener_sp(
+        Listener::MakeListener("lldb.IOHandler.curses.Application"));
+    ConstString broadcaster_class_target(Target::GetStaticBroadcasterClass());
+    ConstString broadcaster_class_process(Process::GetStaticBroadcasterClass());
+    ConstString broadcaster_class_thread(Thread::GetStaticBroadcasterClass());
+    debugger.EnableForwardEvents(listener_sp);
+
+    bool update = true;
+#if defined(__APPLE__)
+    std::deque<int> escape_chars;
+#endif
+
+    while (!done) {
+      if (update) {
+        m_window_sp->Draw(false);
+        // All windows should be calling Window::DeferredRefresh() instead of
+        // Window::Refresh() so we can do a single update and avoid any screen
+        // blinking
+        update_panels();
+
+        // Cursor hiding isn't working on MacOSX, so hide it in the top left
+        // corner
+        m_window_sp->MoveCursor(0, 0);
+
+        doupdate();
+        update = false;
+      }
+
+#if defined(__APPLE__)
+      // Terminal.app doesn't map its function keys correctly, F1-F4 default
+      // to: \033OP, \033OQ, \033OR, \033OS, so lets take care of this here if
+      // possible
+      int ch;
+      if (escape_chars.empty())
+        ch = m_window_sp->GetChar();
+      else {
+        ch = escape_chars.front();
+        escape_chars.pop_front();
+      }
+      if (ch == KEY_ESCAPE) {
+        int ch2 = m_window_sp->GetChar();
+        if (ch2 == 'O') {
+          int ch3 = m_window_sp->GetChar();
+          switch (ch3) {
+          case 'P':
+            ch = KEY_F(1);
+            break;
+          case 'Q':
+            ch = KEY_F(2);
+            break;
+          case 'R':
+            ch = KEY_F(3);
+            break;
+          case 'S':
+            ch = KEY_F(4);
+            break;
+          default:
+            escape_chars.push_back(ch2);
+            if (ch3 != -1)
+              escape_chars.push_back(ch3);
+            break;
+          }
+        } else if (ch2 != -1)
+          escape_chars.push_back(ch2);
+      }
+#else
+      int ch = m_window_sp->GetChar();
+
+#endif
+      if (ch == -1) {
+        if (feof(m_in) || ferror(m_in)) {
+          done = true;
+        } else {
+          // Just a timeout from using halfdelay(), check for events
+          EventSP event_sp;
+          while (listener_sp->PeekAtNextEvent()) {
+            listener_sp->GetEvent(event_sp, std::chrono::seconds(0));
+
+            if (event_sp) {
+              Broadcaster *broadcaster = event_sp->GetBroadcaster();
+              if (broadcaster) {
+                // uint32_t event_type = event_sp->GetType();
+                ConstString broadcaster_class(
+                    broadcaster->GetBroadcasterClass());
+                if (broadcaster_class == broadcaster_class_process) {
+                  debugger.GetCommandInterpreter().UpdateExecutionContext(
+                      nullptr);
+                  update = true;
+                  continue; // Don't get any key, just update our view
+                }
+              }
+            }
+          }
+        }
+      } else {
+        HandleCharResult key_result = m_window_sp->HandleChar(ch);
+        switch (key_result) {
+        case eKeyHandled:
+          debugger.GetCommandInterpreter().UpdateExecutionContext(nullptr);
+          update = true;
+          break;
+        case eKeyNotHandled:
+          break;
+        case eQuitApplication:
+          done = true;
+          break;
+        }
+      }
+    }
+
+    debugger.CancelForwardEvents(listener_sp);
+  }
+
+  WindowSP &GetMainWindow() {
+    if (!m_window_sp)
+      m_window_sp = std::make_shared<Window>("main", stdscr, false);
+    return m_window_sp;
+  }
+
+  WindowDelegates &GetWindowDelegates() { return m_window_delegates; }
+
+protected:
+  WindowSP m_window_sp;
+  WindowDelegates m_window_delegates;
+  SCREEN *m_screen;
+  FILE *m_in;
+  FILE *m_out;
+};
+
+} // namespace curses
+
+using namespace curses;
+
+struct Row {
+  ValueObjectManager value;
+  Row *parent;
+  // The process stop ID when the children were calculated.
+  uint32_t children_stop_id;
+  int row_idx;
+  int x;
+  int y;
+  bool might_have_children;
+  bool expanded;
+  bool calculated_children;
+  std::vector<Row> children;
+
+  Row(const ValueObjectSP &v, Row *p)
+      : value(v, lldb::eDynamicDontRunTarget, true), parent(p), row_idx(0),
+        x(1), y(1), might_have_children(v ? v->MightHaveChildren() : false),
+        expanded(false), calculated_children(false), children() {}
+
+  size_t GetDepth() const {
+    if (parent)
+      return 1 + parent->GetDepth();
+    return 0;
+  }
+
+  void Expand() {
+    expanded = true;
+  }
+
+  std::vector<Row> &GetChildren() {
+    ProcessSP process_sp = value.GetProcessSP();
+    auto stop_id = process_sp->GetStopID();
+    if (process_sp && stop_id != children_stop_id) {
+      children_stop_id = stop_id;
+      calculated_children = false;
+    }
+    if (!calculated_children) {
+      children.clear();
+      calculated_children = true;
+      ValueObjectSP valobj = value.GetSP();
+      if (valobj) {
+        const size_t num_children = valobj->GetNumChildren();
+        for (size_t i = 0; i < num_children; ++i) {
+          children.push_back(Row(valobj->GetChildAtIndex(i, true), this));
+        }
+      }
+    }
+    return children;
+  }
+
+  void Unexpand() {
+    expanded = false;
+    calculated_children = false;
+    children.clear();
+  }
+
+  void DrawTree(Window &window) {
+    if (parent)
+      parent->DrawTreeForChild(window, this, 0);
+
+    if (might_have_children) {
+      // It we can get UTF8 characters to work we should try to use the
+      // "symbol" UTF8 string below
+      //            const char *symbol = "";
+      //            if (row.expanded)
+      //                symbol = "\xe2\x96\xbd ";
+      //            else
+      //                symbol = "\xe2\x96\xb7 ";
+      //            window.PutCString (symbol);
+
+      // The ACS_DARROW and ACS_RARROW don't look very nice they are just a 'v'
+      // or '>' character...
+      //            if (expanded)
+      //                window.PutChar (ACS_DARROW);
+      //            else
+      //                window.PutChar (ACS_RARROW);
+      // Since we can't find any good looking right arrow/down arrow symbols,
+      // just use a diamond...
+      window.PutChar(ACS_DIAMOND);
+      window.PutChar(ACS_HLINE);
+    }
+  }
+
+  void DrawTreeForChild(Window &window, Row *child, uint32_t reverse_depth) {
+    if (parent)
+      parent->DrawTreeForChild(window, this, reverse_depth + 1);
+
+    if (&GetChildren().back() == child) {
+      // Last child
+      if (reverse_depth == 0) {
+        window.PutChar(ACS_LLCORNER);
+        window.PutChar(ACS_HLINE);
+      } else {
+        window.PutChar(' ');
+        window.PutChar(' ');
+      }
+    } else {
+      if (reverse_depth == 0) {
+        window.PutChar(ACS_LTEE);
+        window.PutChar(ACS_HLINE);
+      } else {
+        window.PutChar(ACS_VLINE);
+        window.PutChar(' ');
+      }
+    }
+  }
+};
+
+struct DisplayOptions {
+  bool show_types;
+};
+
+class TreeItem;
+
+class TreeDelegate {
+public:
+  TreeDelegate() = default;
+  virtual ~TreeDelegate() = default;
+
+  virtual void TreeDelegateDrawTreeItem(TreeItem &item, Window &window) = 0;
+  virtual void TreeDelegateGenerateChildren(TreeItem &item) = 0;
+  virtual bool TreeDelegateItemSelected(
+      TreeItem &item) = 0; // Return true if we need to update views
+};
+
+typedef std::shared_ptr<TreeDelegate> TreeDelegateSP;
+
+class TreeItem {
+public:
+  TreeItem(TreeItem *parent, TreeDelegate &delegate, bool might_have_children)
+      : m_parent(parent), m_delegate(delegate), m_user_data(nullptr),
+        m_identifier(0), m_row_idx(-1), m_children(),
+        m_might_have_children(might_have_children), m_is_expanded(false) {}
+
+  TreeItem &operator=(const TreeItem &rhs) {
+    if (this != &rhs) {
+      m_parent = rhs.m_parent;
+      m_delegate = rhs.m_delegate;
+      m_user_data = rhs.m_user_data;
+      m_identifier = rhs.m_identifier;
+      m_row_idx = rhs.m_row_idx;
+      m_children = rhs.m_children;
+      m_might_have_children = rhs.m_might_have_children;
+      m_is_expanded = rhs.m_is_expanded;
+    }
+    return *this;
+  }
+
+  size_t GetDepth() const {
+    if (m_parent)
+      return 1 + m_parent->GetDepth();
+    return 0;
+  }
+
+  int GetRowIndex() const { return m_row_idx; }
+
+  void ClearChildren() { m_children.clear(); }
+
+  void Resize(size_t n, const TreeItem &t) { m_children.resize(n, t); }
+
+  TreeItem &operator[](size_t i) { return m_children[i]; }
+
+  void SetRowIndex(int row_idx) { m_row_idx = row_idx; }
+
+  size_t GetNumChildren() {
+    m_delegate.TreeDelegateGenerateChildren(*this);
+    return m_children.size();
+  }
+
+  void ItemWasSelected() { m_delegate.TreeDelegateItemSelected(*this); }
+
+  void CalculateRowIndexes(int &row_idx) {
+    SetRowIndex(row_idx);
+    ++row_idx;
+
+    const bool expanded = IsExpanded();
+
+    // The root item must calculate its children, or we must calculate the
+    // number of children if the item is expanded
+    if (m_parent == nullptr || expanded)
+      GetNumChildren();
+
+    for (auto &item : m_children) {
+      if (expanded)
+        item.CalculateRowIndexes(row_idx);
+      else
+        item.SetRowIndex(-1);
+    }
+  }
+
+  TreeItem *GetParent() { return m_parent; }
+
+  bool IsExpanded() const { return m_is_expanded; }
+
+  void Expand() { m_is_expanded = true; }
+
+  void Unexpand() { m_is_expanded = false; }
+
+  bool Draw(Window &window, const int first_visible_row,
+            const uint32_t selected_row_idx, int &row_idx, int &num_rows_left) {
+    if (num_rows_left <= 0)
+      return false;
+
+    if (m_row_idx >= first_visible_row) {
+      window.MoveCursor(2, row_idx + 1);
+
+      if (m_parent)
+        m_parent->DrawTreeForChild(window, this, 0);
+
+      if (m_might_have_children) {
+        // It we can get UTF8 characters to work we should try to use the
+        // "symbol" UTF8 string below
+        //            const char *symbol = "";
+        //            if (row.expanded)
+        //                symbol = "\xe2\x96\xbd ";
+        //            else
+        //                symbol = "\xe2\x96\xb7 ";
+        //            window.PutCString (symbol);
+
+        // The ACS_DARROW and ACS_RARROW don't look very nice they are just a
+        // 'v' or '>' character...
+        //            if (expanded)
+        //                window.PutChar (ACS_DARROW);
+        //            else
+        //                window.PutChar (ACS_RARROW);
+        // Since we can't find any good looking right arrow/down arrow symbols,
+        // just use a diamond...
+        window.PutChar(ACS_DIAMOND);
+        window.PutChar(ACS_HLINE);
+      }
+      bool highlight = (selected_row_idx == static_cast<size_t>(m_row_idx)) &&
+                       window.IsActive();
+
+      if (highlight)
+        window.AttributeOn(A_REVERSE);
+
+      m_delegate.TreeDelegateDrawTreeItem(*this, window);
+
+      if (highlight)
+        window.AttributeOff(A_REVERSE);
+      ++row_idx;
+      --num_rows_left;
+    }
+
+    if (num_rows_left <= 0)
+      return false; // We are done drawing...
+
+    if (IsExpanded()) {
+      for (auto &item : m_children) {
+        // If we displayed all the rows and item.Draw() returns false we are
+        // done drawing and can exit this for loop
+        if (!item.Draw(window, first_visible_row, selected_row_idx, row_idx,
+                       num_rows_left))
+          break;
+      }
+    }
+    return num_rows_left >= 0; // Return true if not done drawing yet
+  }
+
+  void DrawTreeForChild(Window &window, TreeItem *child,
+                        uint32_t reverse_depth) {
+    if (m_parent)
+      m_parent->DrawTreeForChild(window, this, reverse_depth + 1);
+
+    if (&m_children.back() == child) {
+      // Last child
+      if (reverse_depth == 0) {
+        window.PutChar(ACS_LLCORNER);
+        window.PutChar(ACS_HLINE);
+      } else {
+        window.PutChar(' ');
+        window.PutChar(' ');
+      }
+    } else {
+      if (reverse_depth == 0) {
+        window.PutChar(ACS_LTEE);
+        window.PutChar(ACS_HLINE);
+      } else {
+        window.PutChar(ACS_VLINE);
+        window.PutChar(' ');
+      }
+    }
+  }
+
+  TreeItem *GetItemForRowIndex(uint32_t row_idx) {
+    if (static_cast<uint32_t>(m_row_idx) == row_idx)
+      return this;
+    if (m_children.empty())
+      return nullptr;
+    if (IsExpanded()) {
+      for (auto &item : m_children) {
+        TreeItem *selected_item_ptr = item.GetItemForRowIndex(row_idx);
+        if (selected_item_ptr)
+          return selected_item_ptr;
+      }
+    }
+    return nullptr;
+  }
+
+  void *GetUserData() const { return m_user_data; }
+
+  void SetUserData(void *user_data) { m_user_data = user_data; }
+
+  uint64_t GetIdentifier() const { return m_identifier; }
+
+  void SetIdentifier(uint64_t identifier) { m_identifier = identifier; }
+
+  void SetMightHaveChildren(bool b) { m_might_have_children = b; }
+
+protected:
+  TreeItem *m_parent;
+  TreeDelegate &m_delegate;
+  void *m_user_data;
+  uint64_t m_identifier;
+  int m_row_idx; // Zero based visible row index, -1 if not visible or for the
+                 // root item
+  std::vector<TreeItem> m_children;
+  bool m_might_have_children;
+  bool m_is_expanded;
+};
+
+class TreeWindowDelegate : public WindowDelegate {
+public:
+  TreeWindowDelegate(Debugger &debugger, const TreeDelegateSP &delegate_sp)
+      : m_debugger(debugger), m_delegate_sp(delegate_sp),
+        m_root(nullptr, *delegate_sp, true), m_selected_item(nullptr),
+        m_num_rows(0), m_selected_row_idx(0), m_first_visible_row(0),
+        m_min_x(0), m_min_y(0), m_max_x(0), m_max_y(0) {}
+
+  int NumVisibleRows() const { return m_max_y - m_min_y; }
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    ExecutionContext exe_ctx(
+        m_debugger.GetCommandInterpreter().GetExecutionContext());
+    Process *process = exe_ctx.GetProcessPtr();
+
+    bool display_content = false;
+    if (process) {
+      StateType state = process->GetState();
+      if (StateIsStoppedState(state, true)) {
+        // We are stopped, so it is ok to
+        display_content = true;
+      } else if (StateIsRunningState(state)) {
+        return true; // Don't do any updating when we are running
+      }
+    }
+
+    m_min_x = 2;
+    m_min_y = 1;
+    m_max_x = window.GetWidth() - 1;
+    m_max_y = window.GetHeight() - 1;
+
+    window.Erase();
+    window.DrawTitleBox(window.GetName());
+
+    if (display_content) {
+      const int num_visible_rows = NumVisibleRows();
+      m_num_rows = 0;
+      m_root.CalculateRowIndexes(m_num_rows);
+
+      // If we unexpanded while having something selected our total number of
+      // rows is less than the num visible rows, then make sure we show all the
+      // rows by setting the first visible row accordingly.
+      if (m_first_visible_row > 0 && m_num_rows < num_visible_rows)
+        m_first_visible_row = 0;
+
+      // Make sure the selected row is always visible
+      if (m_selected_row_idx < m_first_visible_row)
+        m_first_visible_row = m_selected_row_idx;
+      else if (m_first_visible_row + num_visible_rows <= m_selected_row_idx)
+        m_first_visible_row = m_selected_row_idx - num_visible_rows + 1;
+
+      int row_idx = 0;
+      int num_rows_left = num_visible_rows;
+      m_root.Draw(window, m_first_visible_row, m_selected_row_idx, row_idx,
+                  num_rows_left);
+      // Get the selected row
+      m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+    } else {
+      m_selected_item = nullptr;
+    }
+
+    window.DeferredRefresh();
+
+    return true; // Drawing handled
+  }
+
+  const char *WindowDelegateGetHelpText() override {
+    return "Thread window keyboard shortcuts:";
+  }
+
+  KeyHelp *WindowDelegateGetKeyHelp() override {
+    static curses::KeyHelp g_source_view_key_help[] = {
+        {KEY_UP, "Select previous item"},
+        {KEY_DOWN, "Select next item"},
+        {KEY_RIGHT, "Expand the selected item"},
+        {KEY_LEFT,
+         "Unexpand the selected item or select parent if not expanded"},
+        {KEY_PPAGE, "Page up"},
+        {KEY_NPAGE, "Page down"},
+        {'h', "Show help dialog"},
+        {' ', "Toggle item expansion"},
+        {',', "Page up"},
+        {'.', "Page down"},
+        {'\0', nullptr}};
+    return g_source_view_key_help;
+  }
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int c) override {
+    switch (c) {
+    case ',':
+    case KEY_PPAGE:
+      // Page up key
+      if (m_first_visible_row > 0) {
+        if (m_first_visible_row > m_max_y)
+          m_first_visible_row -= m_max_y;
+        else
+          m_first_visible_row = 0;
+        m_selected_row_idx = m_first_visible_row;
+        m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+        if (m_selected_item)
+          m_selected_item->ItemWasSelected();
+      }
+      return eKeyHandled;
+
+    case '.':
+    case KEY_NPAGE:
+      // Page down key
+      if (m_num_rows > m_max_y) {
+        if (m_first_visible_row + m_max_y < m_num_rows) {
+          m_first_visible_row += m_max_y;
+          m_selected_row_idx = m_first_visible_row;
+          m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+          if (m_selected_item)
+            m_selected_item->ItemWasSelected();
+        }
+      }
+      return eKeyHandled;
+
+    case KEY_UP:
+      if (m_selected_row_idx > 0) {
+        --m_selected_row_idx;
+        m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+        if (m_selected_item)
+          m_selected_item->ItemWasSelected();
+      }
+      return eKeyHandled;
+
+    case KEY_DOWN:
+      if (m_selected_row_idx + 1 < m_num_rows) {
+        ++m_selected_row_idx;
+        m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+        if (m_selected_item)
+          m_selected_item->ItemWasSelected();
+      }
+      return eKeyHandled;
+
+    case KEY_RIGHT:
+      if (m_selected_item) {
+        if (!m_selected_item->IsExpanded())
+          m_selected_item->Expand();
+      }
+      return eKeyHandled;
+
+    case KEY_LEFT:
+      if (m_selected_item) {
+        if (m_selected_item->IsExpanded())
+          m_selected_item->Unexpand();
+        else if (m_selected_item->GetParent()) {
+          m_selected_row_idx = m_selected_item->GetParent()->GetRowIndex();
+          m_selected_item = m_root.GetItemForRowIndex(m_selected_row_idx);
+          if (m_selected_item)
+            m_selected_item->ItemWasSelected();
+        }
+      }
+      return eKeyHandled;
+
+    case ' ':
+      // Toggle expansion state when SPACE is pressed
+      if (m_selected_item) {
+        if (m_selected_item->IsExpanded())
+          m_selected_item->Unexpand();
+        else
+          m_selected_item->Expand();
+      }
+      return eKeyHandled;
+
+    case 'h':
+      window.CreateHelpSubwindow();
+      return eKeyHandled;
+
+    default:
+      break;
+    }
+    return eKeyNotHandled;
+  }
+
+protected:
+  Debugger &m_debugger;
+  TreeDelegateSP m_delegate_sp;
+  TreeItem m_root;
+  TreeItem *m_selected_item;
+  int m_num_rows;
+  int m_selected_row_idx;
+  int m_first_visible_row;
+  int m_min_x;
+  int m_min_y;
+  int m_max_x;
+  int m_max_y;
+};
+
+class FrameTreeDelegate : public TreeDelegate {
+public:
+  FrameTreeDelegate() : TreeDelegate() {
+    FormatEntity::Parse(
+        "frame #${frame.index}: {${function.name}${function.pc-offset}}}",
+        m_format);
+  }
+
+  ~FrameTreeDelegate() override = default;
+
+  void TreeDelegateDrawTreeItem(TreeItem &item, Window &window) override {
+    Thread *thread = (Thread *)item.GetUserData();
+    if (thread) {
+      const uint64_t frame_idx = item.GetIdentifier();
+      StackFrameSP frame_sp = thread->GetStackFrameAtIndex(frame_idx);
+      if (frame_sp) {
+        StreamString strm;
+        const SymbolContext &sc =
+            frame_sp->GetSymbolContext(eSymbolContextEverything);
+        ExecutionContext exe_ctx(frame_sp);
+        if (FormatEntity::Format(m_format, strm, &sc, &exe_ctx, nullptr,
+                                 nullptr, false, false)) {
+          int right_pad = 1;
+          window.PutCStringTruncated(strm.GetString().str().c_str(), right_pad);
+        }
+      }
+    }
+  }
+
+  void TreeDelegateGenerateChildren(TreeItem &item) override {
+    // No children for frames yet...
+  }
+
+  bool TreeDelegateItemSelected(TreeItem &item) override {
+    Thread *thread = (Thread *)item.GetUserData();
+    if (thread) {
+      thread->GetProcess()->GetThreadList().SetSelectedThreadByID(
+          thread->GetID());
+      const uint64_t frame_idx = item.GetIdentifier();
+      thread->SetSelectedFrameByIndex(frame_idx);
+      return true;
+    }
+    return false;
+  }
+
+protected:
+  FormatEntity::Entry m_format;
+};
+
+class ThreadTreeDelegate : public TreeDelegate {
+public:
+  ThreadTreeDelegate(Debugger &debugger)
+      : TreeDelegate(), m_debugger(debugger), m_tid(LLDB_INVALID_THREAD_ID),
+        m_stop_id(UINT32_MAX) {
+    FormatEntity::Parse("thread #${thread.index}: tid = ${thread.id}{, stop "
+                        "reason = ${thread.stop-reason}}",
+                        m_format);
+  }
+
+  ~ThreadTreeDelegate() override = default;
+
+  ProcessSP GetProcess() {
+    return m_debugger.GetCommandInterpreter()
+        .GetExecutionContext()
+        .GetProcessSP();
+  }
+
+  ThreadSP GetThread(const TreeItem &item) {
+    ProcessSP process_sp = GetProcess();
+    if (process_sp)
+      return process_sp->GetThreadList().FindThreadByID(item.GetIdentifier());
+    return ThreadSP();
+  }
+
+  void TreeDelegateDrawTreeItem(TreeItem &item, Window &window) override {
+    ThreadSP thread_sp = GetThread(item);
+    if (thread_sp) {
+      StreamString strm;
+      ExecutionContext exe_ctx(thread_sp);
+      if (FormatEntity::Format(m_format, strm, nullptr, &exe_ctx, nullptr,
+                               nullptr, false, false)) {
+        int right_pad = 1;
+        window.PutCStringTruncated(strm.GetString().str().c_str(), right_pad);
+      }
+    }
+  }
+
+  void TreeDelegateGenerateChildren(TreeItem &item) override {
+    ProcessSP process_sp = GetProcess();
+    if (process_sp && process_sp->IsAlive()) {
+      StateType state = process_sp->GetState();
+      if (StateIsStoppedState(state, true)) {
+        ThreadSP thread_sp = GetThread(item);
+        if (thread_sp) {
+          if (m_stop_id == process_sp->GetStopID() &&
+              thread_sp->GetID() == m_tid)
+            return; // Children are already up to date
+          if (!m_frame_delegate_sp) {
+            // Always expand the thread item the first time we show it
+            m_frame_delegate_sp = std::make_shared<FrameTreeDelegate>();
+          }
+
+          m_stop_id = process_sp->GetStopID();
+          m_tid = thread_sp->GetID();
+
+          TreeItem t(&item, *m_frame_delegate_sp, false);
+          size_t num_frames = thread_sp->GetStackFrameCount();
+          item.Resize(num_frames, t);
+          for (size_t i = 0; i < num_frames; ++i) {
+            item[i].SetUserData(thread_sp.get());
+            item[i].SetIdentifier(i);
+          }
+        }
+        return;
+      }
+    }
+    item.ClearChildren();
+  }
+
+  bool TreeDelegateItemSelected(TreeItem &item) override {
+    ProcessSP process_sp = GetProcess();
+    if (process_sp && process_sp->IsAlive()) {
+      StateType state = process_sp->GetState();
+      if (StateIsStoppedState(state, true)) {
+        ThreadSP thread_sp = GetThread(item);
+        if (thread_sp) {
+          ThreadList &thread_list = thread_sp->GetProcess()->GetThreadList();
+          std::lock_guard<std::recursive_mutex> guard(thread_list.GetMutex());
+          ThreadSP selected_thread_sp = thread_list.GetSelectedThread();
+          if (selected_thread_sp->GetID() != thread_sp->GetID()) {
+            thread_list.SetSelectedThreadByID(thread_sp->GetID());
+            return true;
+          }
+        }
+      }
+    }
+    return false;
+  }
+
+protected:
+  Debugger &m_debugger;
+  std::shared_ptr<FrameTreeDelegate> m_frame_delegate_sp;
+  lldb::user_id_t m_tid;
+  uint32_t m_stop_id;
+  FormatEntity::Entry m_format;
+};
+
+class ThreadsTreeDelegate : public TreeDelegate {
+public:
+  ThreadsTreeDelegate(Debugger &debugger)
+      : TreeDelegate(), m_thread_delegate_sp(), m_debugger(debugger),
+        m_stop_id(UINT32_MAX) {
+    FormatEntity::Parse("process ${process.id}{, name = ${process.name}}",
+                        m_format);
+  }
+
+  ~ThreadsTreeDelegate() override = default;
+
+  ProcessSP GetProcess() {
+    return m_debugger.GetCommandInterpreter()
+        .GetExecutionContext()
+        .GetProcessSP();
+  }
+
+  void TreeDelegateDrawTreeItem(TreeItem &item, Window &window) override {
+    ProcessSP process_sp = GetProcess();
+    if (process_sp && process_sp->IsAlive()) {
+      StreamString strm;
+      ExecutionContext exe_ctx(process_sp);
+      if (FormatEntity::Format(m_format, strm, nullptr, &exe_ctx, nullptr,
+                               nullptr, false, false)) {
+        int right_pad = 1;
+        window.PutCStringTruncated(strm.GetString().str().c_str(), right_pad);
+      }
+    }
+  }
+
+  void TreeDelegateGenerateChildren(TreeItem &item) override {
+    ProcessSP process_sp = GetProcess();
+    if (process_sp && process_sp->IsAlive()) {
+      StateType state = process_sp->GetState();
+      if (StateIsStoppedState(state, true)) {
+        const uint32_t stop_id = process_sp->GetStopID();
+        if (m_stop_id == stop_id)
+          return; // Children are already up to date
+
+        m_stop_id = stop_id;
+
+        if (!m_thread_delegate_sp) {
+          // Always expand the thread item the first time we show it
+          // item.Expand();
+          m_thread_delegate_sp =
+              std::make_shared<ThreadTreeDelegate>(m_debugger);
+        }
+
+        TreeItem t(&item, *m_thread_delegate_sp, false);
+        ThreadList &threads = process_sp->GetThreadList();
+        std::lock_guard<std::recursive_mutex> guard(threads.GetMutex());
+        size_t num_threads = threads.GetSize();
+        item.Resize(num_threads, t);
+        for (size_t i = 0; i < num_threads; ++i) {
+          item[i].SetIdentifier(threads.GetThreadAtIndex(i)->GetID());
+          item[i].SetMightHaveChildren(true);
+        }
+        return;
+      }
+    }
+    item.ClearChildren();
+  }
+
+  bool TreeDelegateItemSelected(TreeItem &item) override { return false; }
+
+protected:
+  std::shared_ptr<ThreadTreeDelegate> m_thread_delegate_sp;
+  Debugger &m_debugger;
+  uint32_t m_stop_id;
+  FormatEntity::Entry m_format;
+};
+
+class ValueObjectListDelegate : public WindowDelegate {
+public:
+  ValueObjectListDelegate()
+      : m_rows(), m_selected_row(nullptr),
+        m_selected_row_idx(0), m_first_visible_row(0), m_num_rows(0),
+        m_max_x(0), m_max_y(0) {}
+
+  ValueObjectListDelegate(ValueObjectList &valobj_list)
+      : m_rows(), m_selected_row(nullptr),
+        m_selected_row_idx(0), m_first_visible_row(0), m_num_rows(0),
+        m_max_x(0), m_max_y(0) {
+    SetValues(valobj_list);
+  }
+
+  ~ValueObjectListDelegate() override = default;
+
+  void SetValues(ValueObjectList &valobj_list) {
+    m_selected_row = nullptr;
+    m_selected_row_idx = 0;
+    m_first_visible_row = 0;
+    m_num_rows = 0;
+    m_rows.clear();
+    for (auto &valobj_sp : valobj_list.GetObjects())
+      m_rows.push_back(Row(valobj_sp, nullptr));
+  }
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    m_num_rows = 0;
+    m_min_x = 2;
+    m_min_y = 1;
+    m_max_x = window.GetWidth() - 1;
+    m_max_y = window.GetHeight() - 1;
+
+    window.Erase();
+    window.DrawTitleBox(window.GetName());
+
+    const int num_visible_rows = NumVisibleRows();
+    const int num_rows = CalculateTotalNumberRows(m_rows);
+
+    // If we unexpanded while having something selected our total number of
+    // rows is less than the num visible rows, then make sure we show all the
+    // rows by setting the first visible row accordingly.
+    if (m_first_visible_row > 0 && num_rows < num_visible_rows)
+      m_first_visible_row = 0;
+
+    // Make sure the selected row is always visible
+    if (m_selected_row_idx < m_first_visible_row)
+      m_first_visible_row = m_selected_row_idx;
+    else if (m_first_visible_row + num_visible_rows <= m_selected_row_idx)
+      m_first_visible_row = m_selected_row_idx - num_visible_rows + 1;
+
+    DisplayRows(window, m_rows, g_options);
+
+    window.DeferredRefresh();
+
+    // Get the selected row
+    m_selected_row = GetRowForRowIndex(m_selected_row_idx);
+    // Keep the cursor on the selected row so the highlight and the cursor are
+    // always on the same line
+    if (m_selected_row)
+      window.MoveCursor(m_selected_row->x, m_selected_row->y);
+
+    return true; // Drawing handled
+  }
+
+  KeyHelp *WindowDelegateGetKeyHelp() override {
+    static curses::KeyHelp g_source_view_key_help[] = {
+        {KEY_UP, "Select previous item"},
+        {KEY_DOWN, "Select next item"},
+        {KEY_RIGHT, "Expand selected item"},
+        {KEY_LEFT, "Unexpand selected item or select parent if not expanded"},
+        {KEY_PPAGE, "Page up"},
+        {KEY_NPAGE, "Page down"},
+        {'A', "Format as annotated address"},
+        {'b', "Format as binary"},
+        {'B', "Format as hex bytes with ASCII"},
+        {'c', "Format as character"},
+        {'d', "Format as a signed integer"},
+        {'D', "Format selected value using the default format for the type"},
+        {'f', "Format as float"},
+        {'h', "Show help dialog"},
+        {'i', "Format as instructions"},
+        {'o', "Format as octal"},
+        {'p', "Format as pointer"},
+        {'s', "Format as C string"},
+        {'t', "Toggle showing/hiding type names"},
+        {'u', "Format as an unsigned integer"},
+        {'x', "Format as hex"},
+        {'X', "Format as uppercase hex"},
+        {' ', "Toggle item expansion"},
+        {',', "Page up"},
+        {'.', "Page down"},
+        {'\0', nullptr}};
+    return g_source_view_key_help;
+  }
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int c) override {
+    switch (c) {
+    case 'x':
+    case 'X':
+    case 'o':
+    case 's':
+    case 'u':
+    case 'd':
+    case 'D':
+    case 'i':
+    case 'A':
+    case 'p':
+    case 'c':
+    case 'b':
+    case 'B':
+    case 'f':
+      // Change the format for the currently selected item
+      if (m_selected_row) {
+        auto valobj_sp = m_selected_row->value.GetSP();
+        if (valobj_sp)
+          valobj_sp->SetFormat(FormatForChar(c));
+      }
+      return eKeyHandled;
+
+    case 't':
+      // Toggle showing type names
+      g_options.show_types = !g_options.show_types;
+      return eKeyHandled;
+
+    case ',':
+    case KEY_PPAGE:
+      // Page up key
+      if (m_first_visible_row > 0) {
+        if (static_cast<int>(m_first_visible_row) > m_max_y)
+          m_first_visible_row -= m_max_y;
+        else
+          m_first_visible_row = 0;
+        m_selected_row_idx = m_first_visible_row;
+      }
+      return eKeyHandled;
+
+    case '.':
+    case KEY_NPAGE:
+      // Page down key
+      if (m_num_rows > static_cast<size_t>(m_max_y)) {
+        if (m_first_visible_row + m_max_y < m_num_rows) {
+          m_first_visible_row += m_max_y;
+          m_selected_row_idx = m_first_visible_row;
+        }
+      }
+      return eKeyHandled;
+
+    case KEY_UP:
+      if (m_selected_row_idx > 0)
+        --m_selected_row_idx;
+      return eKeyHandled;
+
+    case KEY_DOWN:
+      if (m_selected_row_idx + 1 < m_num_rows)
+        ++m_selected_row_idx;
+      return eKeyHandled;
+
+    case KEY_RIGHT:
+      if (m_selected_row) {
+        if (!m_selected_row->expanded)
+          m_selected_row->Expand();
+      }
+      return eKeyHandled;
+
+    case KEY_LEFT:
+      if (m_selected_row) {
+        if (m_selected_row->expanded)
+          m_selected_row->Unexpand();
+        else if (m_selected_row->parent)
+          m_selected_row_idx = m_selected_row->parent->row_idx;
+      }
+      return eKeyHandled;
+
+    case ' ':
+      // Toggle expansion state when SPACE is pressed
+      if (m_selected_row) {
+        if (m_selected_row->expanded)
+          m_selected_row->Unexpand();
+        else
+          m_selected_row->Expand();
+      }
+      return eKeyHandled;
+
+    case 'h':
+      window.CreateHelpSubwindow();
+      return eKeyHandled;
+
+    default:
+      break;
+    }
+    return eKeyNotHandled;
+  }
+
+protected:
+  std::vector<Row> m_rows;
+  Row *m_selected_row;
+  uint32_t m_selected_row_idx;
+  uint32_t m_first_visible_row;
+  uint32_t m_num_rows;
+  int m_min_x;
+  int m_min_y;
+  int m_max_x;
+  int m_max_y;
+
+  static Format FormatForChar(int c) {
+    switch (c) {
+    case 'x':
+      return eFormatHex;
+    case 'X':
+      return eFormatHexUppercase;
+    case 'o':
+      return eFormatOctal;
+    case 's':
+      return eFormatCString;
+    case 'u':
+      return eFormatUnsigned;
+    case 'd':
+      return eFormatDecimal;
+    case 'D':
+      return eFormatDefault;
+    case 'i':
+      return eFormatInstruction;
+    case 'A':
+      return eFormatAddressInfo;
+    case 'p':
+      return eFormatPointer;
+    case 'c':
+      return eFormatChar;
+    case 'b':
+      return eFormatBinary;
+    case 'B':
+      return eFormatBytesWithASCII;
+    case 'f':
+      return eFormatFloat;
+    }
+    return eFormatDefault;
+  }
+
+  bool DisplayRowObject(Window &window, Row &row, DisplayOptions &options,
+                        bool highlight, bool last_child) {
+    ValueObject *valobj = row.value.GetSP().get();
+
+    if (valobj == nullptr)
+      return false;
+
+    const char *type_name =
+        options.show_types ? valobj->GetTypeName().GetCString() : nullptr;
+    const char *name = valobj->GetName().GetCString();
+    const char *value = valobj->GetValueAsCString();
+    const char *summary = valobj->GetSummaryAsCString();
+
+    window.MoveCursor(row.x, row.y);
+
+    row.DrawTree(window);
+
+    if (highlight)
+      window.AttributeOn(A_REVERSE);
+
+    if (type_name && type_name[0])
+      window.Printf("(%s) ", type_name);
+
+    if (name && name[0])
+      window.PutCString(name);
+
+    attr_t changd_attr = 0;
+    if (valobj->GetValueDidChange())
+      changd_attr = COLOR_PAIR(5) | A_BOLD;
+
+    if (value && value[0]) {
+      window.PutCString(" = ");
+      if (changd_attr)
+        window.AttributeOn(changd_attr);
+      window.PutCString(value);
+      if (changd_attr)
+        window.AttributeOff(changd_attr);
+    }
+
+    if (summary && summary[0]) {
+      window.PutChar(' ');
+      if (changd_attr)
+        window.AttributeOn(changd_attr);
+      window.PutCString(summary);
+      if (changd_attr)
+        window.AttributeOff(changd_attr);
+    }
+
+    if (highlight)
+      window.AttributeOff(A_REVERSE);
+
+    return true;
+  }
+
+  void DisplayRows(Window &window, std::vector<Row> &rows,
+                   DisplayOptions &options) {
+    // >   0x25B7
+    // \/  0x25BD
+
+    bool window_is_active = window.IsActive();
+    for (auto &row : rows) {
+      const bool last_child = row.parent && &rows[rows.size() - 1] == &row;
+      // Save the row index in each Row structure
+      row.row_idx = m_num_rows;
+      if ((m_num_rows >= m_first_visible_row) &&
+          ((m_num_rows - m_first_visible_row) <
+           static_cast<size_t>(NumVisibleRows()))) {
+        row.x = m_min_x;
+        row.y = m_num_rows - m_first_visible_row + 1;
+        if (DisplayRowObject(window, row, options,
+                             window_is_active &&
+                                 m_num_rows == m_selected_row_idx,
+                             last_child)) {
+          ++m_num_rows;
+        } else {
+          row.x = 0;
+          row.y = 0;
+        }
+      } else {
+        row.x = 0;
+        row.y = 0;
+        ++m_num_rows;
+      }
+
+      auto &children = row.GetChildren();
+      if (row.expanded && !children.empty()) {
+        DisplayRows(window, children, options);
+      }
+    }
+  }
+
+  int CalculateTotalNumberRows(std::vector<Row> &rows) {
+    int row_count = 0;
+    for (auto &row : rows) {
+      ++row_count;
+      if (row.expanded)
+        row_count += CalculateTotalNumberRows(row.GetChildren());
+    }
+    return row_count;
+  }
+
+  static Row *GetRowForRowIndexImpl(std::vector<Row> &rows, size_t &row_index) {
+    for (auto &row : rows) {
+      if (row_index == 0)
+        return &row;
+      else {
+        --row_index;
+        auto &children = row.GetChildren();
+        if (row.expanded && !children.empty()) {
+          Row *result = GetRowForRowIndexImpl(children, row_index);
+          if (result)
+            return result;
+        }
+      }
+    }
+    return nullptr;
+  }
+
+  Row *GetRowForRowIndex(size_t row_index) {
+    return GetRowForRowIndexImpl(m_rows, row_index);
+  }
+
+  int NumVisibleRows() const { return m_max_y - m_min_y; }
+
+  static DisplayOptions g_options;
+};
+
+class FrameVariablesWindowDelegate : public ValueObjectListDelegate {
+public:
+  FrameVariablesWindowDelegate(Debugger &debugger)
+      : ValueObjectListDelegate(), m_debugger(debugger),
+        m_frame_block(nullptr) {}
+
+  ~FrameVariablesWindowDelegate() override = default;
+
+  const char *WindowDelegateGetHelpText() override {
+    return "Frame variable window keyboard shortcuts:";
+  }
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    ExecutionContext exe_ctx(
+        m_debugger.GetCommandInterpreter().GetExecutionContext());
+    Process *process = exe_ctx.GetProcessPtr();
+    Block *frame_block = nullptr;
+    StackFrame *frame = nullptr;
+
+    if (process) {
+      StateType state = process->GetState();
+      if (StateIsStoppedState(state, true)) {
+        frame = exe_ctx.GetFramePtr();
+        if (frame)
+          frame_block = frame->GetFrameBlock();
+      } else if (StateIsRunningState(state)) {
+        return true; // Don't do any updating when we are running
+      }
+    }
+
+    ValueObjectList local_values;
+    if (frame_block) {
+      // Only update the variables if they have changed
+      if (m_frame_block != frame_block) {
+        m_frame_block = frame_block;
+
+        VariableList *locals = frame->GetVariableList(true);
+        if (locals) {
+          const DynamicValueType use_dynamic = eDynamicDontRunTarget;
+          const size_t num_locals = locals->GetSize();
+          for (size_t i = 0; i < num_locals; ++i) {
+            ValueObjectSP value_sp = frame->GetValueObjectForFrameVariable(
+                locals->GetVariableAtIndex(i), use_dynamic);
+            if (value_sp) {
+              ValueObjectSP synthetic_value_sp = value_sp->GetSyntheticValue();
+              if (synthetic_value_sp)
+                local_values.Append(synthetic_value_sp);
+              else
+                local_values.Append(value_sp);
+            }
+          }
+          // Update the values
+          SetValues(local_values);
+        }
+      }
+    } else {
+      m_frame_block = nullptr;
+      // Update the values with an empty list if there is no frame
+      SetValues(local_values);
+    }
+
+    return ValueObjectListDelegate::WindowDelegateDraw(window, force);
+  }
+
+protected:
+  Debugger &m_debugger;
+  Block *m_frame_block;
+};
+
+class RegistersWindowDelegate : public ValueObjectListDelegate {
+public:
+  RegistersWindowDelegate(Debugger &debugger)
+      : ValueObjectListDelegate(), m_debugger(debugger) {}
+
+  ~RegistersWindowDelegate() override = default;
+
+  const char *WindowDelegateGetHelpText() override {
+    return "Register window keyboard shortcuts:";
+  }
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    ExecutionContext exe_ctx(
+        m_debugger.GetCommandInterpreter().GetExecutionContext());
+    StackFrame *frame = exe_ctx.GetFramePtr();
+
+    ValueObjectList value_list;
+    if (frame) {
+      if (frame->GetStackID() != m_stack_id) {
+        m_stack_id = frame->GetStackID();
+        RegisterContextSP reg_ctx(frame->GetRegisterContext());
+        if (reg_ctx) {
+          const uint32_t num_sets = reg_ctx->GetRegisterSetCount();
+          for (uint32_t set_idx = 0; set_idx < num_sets; ++set_idx) {
+            value_list.Append(
+                ValueObjectRegisterSet::Create(frame, reg_ctx, set_idx));
+          }
+        }
+        SetValues(value_list);
+      }
+    } else {
+      Process *process = exe_ctx.GetProcessPtr();
+      if (process && process->IsAlive())
+        return true; // Don't do any updating if we are running
+      else {
+        // Update the values with an empty list if there is no process or the
+        // process isn't alive anymore
+        SetValues(value_list);
+      }
+    }
+    return ValueObjectListDelegate::WindowDelegateDraw(window, force);
+  }
+
+protected:
+  Debugger &m_debugger;
+  StackID m_stack_id;
+};
+
+static const char *CursesKeyToCString(int ch) {
+  static char g_desc[32];
+  if (ch >= KEY_F0 && ch < KEY_F0 + 64) {
+    snprintf(g_desc, sizeof(g_desc), "F%u", ch - KEY_F0);
+    return g_desc;
+  }
+  switch (ch) {
+  case KEY_DOWN:
+    return "down";
+  case KEY_UP:
+    return "up";
+  case KEY_LEFT:
+    return "left";
+  case KEY_RIGHT:
+    return "right";
+  case KEY_HOME:
+    return "home";
+  case KEY_BACKSPACE:
+    return "backspace";
+  case KEY_DL:
+    return "delete-line";
+  case KEY_IL:
+    return "insert-line";
+  case KEY_DC:
+    return "delete-char";
+  case KEY_IC:
+    return "insert-char";
+  case KEY_CLEAR:
+    return "clear";
+  case KEY_EOS:
+    return "clear-to-eos";
+  case KEY_EOL:
+    return "clear-to-eol";
+  case KEY_SF:
+    return "scroll-forward";
+  case KEY_SR:
+    return "scroll-backward";
+  case KEY_NPAGE:
+    return "page-down";
+  case KEY_PPAGE:
+    return "page-up";
+  case KEY_STAB:
+    return "set-tab";
+  case KEY_CTAB:
+    return "clear-tab";
+  case KEY_CATAB:
+    return "clear-all-tabs";
+  case KEY_ENTER:
+    return "enter";
+  case KEY_PRINT:
+    return "print";
+  case KEY_LL:
+    return "lower-left key";
+  case KEY_A1:
+    return "upper left of keypad";
+  case KEY_A3:
+    return "upper right of keypad";
+  case KEY_B2:
+    return "center of keypad";
+  case KEY_C1:
+    return "lower left of keypad";
+  case KEY_C3:
+    return "lower right of keypad";
+  case KEY_BTAB:
+    return "back-tab key";
+  case KEY_BEG:
+    return "begin key";
+  case KEY_CANCEL:
+    return "cancel key";
+  case KEY_CLOSE:
+    return "close key";
+  case KEY_COMMAND:
+    return "command key";
+  case KEY_COPY:
+    return "copy key";
+  case KEY_CREATE:
+    return "create key";
+  case KEY_END:
+    return "end key";
+  case KEY_EXIT:
+    return "exit key";
+  case KEY_FIND:
+    return "find key";
+  case KEY_HELP:
+    return "help key";
+  case KEY_MARK:
+    return "mark key";
+  case KEY_MESSAGE:
+    return "message key";
+  case KEY_MOVE:
+    return "move key";
+  case KEY_NEXT:
+    return "next key";
+  case KEY_OPEN:
+    return "open key";
+  case KEY_OPTIONS:
+    return "options key";
+  case KEY_PREVIOUS:
+    return "previous key";
+  case KEY_REDO:
+    return "redo key";
+  case KEY_REFERENCE:
+    return "reference key";
+  case KEY_REFRESH:
+    return "refresh key";
+  case KEY_REPLACE:
+    return "replace key";
+  case KEY_RESTART:
+    return "restart key";
+  case KEY_RESUME:
+    return "resume key";
+  case KEY_SAVE:
+    return "save key";
+  case KEY_SBEG:
+    return "shifted begin key";
+  case KEY_SCANCEL:
+    return "shifted cancel key";
+  case KEY_SCOMMAND:
+    return "shifted command key";
+  case KEY_SCOPY:
+    return "shifted copy key";
+  case KEY_SCREATE:
+    return "shifted create key";
+  case KEY_SDC:
+    return "shifted delete-character key";
+  case KEY_SDL:
+    return "shifted delete-line key";
+  case KEY_SELECT:
+    return "select key";
+  case KEY_SEND:
+    return "shifted end key";
+  case KEY_SEOL:
+    return "shifted clear-to-end-of-line key";
+  case KEY_SEXIT:
+    return "shifted exit key";
+  case KEY_SFIND:
+    return "shifted find key";
+  case KEY_SHELP:
+    return "shifted help key";
+  case KEY_SHOME:
+    return "shifted home key";
+  case KEY_SIC:
+    return "shifted insert-character key";
+  case KEY_SLEFT:
+    return "shifted left-arrow key";
+  case KEY_SMESSAGE:
+    return "shifted message key";
+  case KEY_SMOVE:
+    return "shifted move key";
+  case KEY_SNEXT:
+    return "shifted next key";
+  case KEY_SOPTIONS:
+    return "shifted options key";
+  case KEY_SPREVIOUS:
+    return "shifted previous key";
+  case KEY_SPRINT:
+    return "shifted print key";
+  case KEY_SREDO:
+    return "shifted redo key";
+  case KEY_SREPLACE:
+    return "shifted replace key";
+  case KEY_SRIGHT:
+    return "shifted right-arrow key";
+  case KEY_SRSUME:
+    return "shifted resume key";
+  case KEY_SSAVE:
+    return "shifted save key";
+  case KEY_SSUSPEND:
+    return "shifted suspend key";
+  case KEY_SUNDO:
+    return "shifted undo key";
+  case KEY_SUSPEND:
+    return "suspend key";
+  case KEY_UNDO:
+    return "undo key";
+  case KEY_MOUSE:
+    return "Mouse event has occurred";
+  case KEY_RESIZE:
+    return "Terminal resize event";
+#ifdef KEY_EVENT
+  case KEY_EVENT:
+    return "We were interrupted by an event";
+#endif
+  case KEY_RETURN:
+    return "return";
+  case ' ':
+    return "space";
+  case '\t':
+    return "tab";
+  case KEY_ESCAPE:
+    return "escape";
+  default:
+    if (isprint(ch))
+      snprintf(g_desc, sizeof(g_desc), "%c", ch);
+    else
+      snprintf(g_desc, sizeof(g_desc), "\\x%2.2x", ch);
+    return g_desc;
+  }
+  return nullptr;
+}
+
+HelpDialogDelegate::HelpDialogDelegate(const char *text,
+                                       KeyHelp *key_help_array)
+    : m_text(), m_first_visible_line(0) {
+  if (text && text[0]) {
+    m_text.SplitIntoLines(text);
+    m_text.AppendString("");
+  }
+  if (key_help_array) {
+    for (KeyHelp *key = key_help_array; key->ch; ++key) {
+      StreamString key_description;
+      key_description.Printf("%10s - %s", CursesKeyToCString(key->ch),
+                             key->description);
+      m_text.AppendString(key_description.GetString());
+    }
+  }
+}
+
+HelpDialogDelegate::~HelpDialogDelegate() = default;
+
+bool HelpDialogDelegate::WindowDelegateDraw(Window &window, bool force) {
+  window.Erase();
+  const int window_height = window.GetHeight();
+  int x = 2;
+  int y = 1;
+  const int min_y = y;
+  const int max_y = window_height - 1 - y;
+  const size_t num_visible_lines = max_y - min_y + 1;
+  const size_t num_lines = m_text.GetSize();
+  const char *bottom_message;
+  if (num_lines <= num_visible_lines)
+    bottom_message = "Press any key to exit";
+  else
+    bottom_message = "Use arrows to scroll, any other key to exit";
+  window.DrawTitleBox(window.GetName(), bottom_message);
+  while (y <= max_y) {
+    window.MoveCursor(x, y);
+    window.PutCStringTruncated(
+        m_text.GetStringAtIndex(m_first_visible_line + y - min_y), 1);
+    ++y;
+  }
+  return true;
+}
+
+HandleCharResult HelpDialogDelegate::WindowDelegateHandleChar(Window &window,
+                                                              int key) {
+  bool done = false;
+  const size_t num_lines = m_text.GetSize();
+  const size_t num_visible_lines = window.GetHeight() - 2;
+
+  if (num_lines <= num_visible_lines) {
+    done = true;
+    // If we have all lines visible and don't need scrolling, then any key
+    // press will cause us to exit
+  } else {
+    switch (key) {
+    case KEY_UP:
+      if (m_first_visible_line > 0)
+        --m_first_visible_line;
+      break;
+
+    case KEY_DOWN:
+      if (m_first_visible_line + num_visible_lines < num_lines)
+        ++m_first_visible_line;
+      break;
+
+    case KEY_PPAGE:
+    case ',':
+      if (m_first_visible_line > 0) {
+        if (static_cast<size_t>(m_first_visible_line) >= num_visible_lines)
+          m_first_visible_line -= num_visible_lines;
+        else
+          m_first_visible_line = 0;
+      }
+      break;
+
+    case KEY_NPAGE:
+    case '.':
+      if (m_first_visible_line + num_visible_lines < num_lines) {
+        m_first_visible_line += num_visible_lines;
+        if (static_cast<size_t>(m_first_visible_line) > num_lines)
+          m_first_visible_line = num_lines - num_visible_lines;
+      }
+      break;
+
+    default:
+      done = true;
+      break;
+    }
+  }
+  if (done)
+    window.GetParent()->RemoveSubWindow(&window);
+  return eKeyHandled;
+}
+
+class ApplicationDelegate : public WindowDelegate, public MenuDelegate {
+public:
+  enum {
+    eMenuID_LLDB = 1,
+    eMenuID_LLDBAbout,
+    eMenuID_LLDBExit,
+
+    eMenuID_Target,
+    eMenuID_TargetCreate,
+    eMenuID_TargetDelete,
+
+    eMenuID_Process,
+    eMenuID_ProcessAttach,
+    eMenuID_ProcessDetach,
+    eMenuID_ProcessLaunch,
+    eMenuID_ProcessContinue,
+    eMenuID_ProcessHalt,
+    eMenuID_ProcessKill,
+
+    eMenuID_Thread,
+    eMenuID_ThreadStepIn,
+    eMenuID_ThreadStepOver,
+    eMenuID_ThreadStepOut,
+
+    eMenuID_View,
+    eMenuID_ViewBacktrace,
+    eMenuID_ViewRegisters,
+    eMenuID_ViewSource,
+    eMenuID_ViewVariables,
+
+    eMenuID_Help,
+    eMenuID_HelpGUIHelp
+  };
+
+  ApplicationDelegate(Application &app, Debugger &debugger)
+      : WindowDelegate(), MenuDelegate(), m_app(app), m_debugger(debugger) {}
+
+  ~ApplicationDelegate() override = default;
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    return false; // Drawing not handled, let standard window drawing happen
+  }
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int key) override {
+    switch (key) {
+    case '\t':
+      window.SelectNextWindowAsActive();
+      return eKeyHandled;
+
+    case 'h':
+      window.CreateHelpSubwindow();
+      return eKeyHandled;
+
+    case KEY_ESCAPE:
+      return eQuitApplication;
+
+    default:
+      break;
+    }
+    return eKeyNotHandled;
+  }
+
+  const char *WindowDelegateGetHelpText() override {
+    return "Welcome to the LLDB curses GUI.\n\n"
+           "Press the TAB key to change the selected view.\n"
+           "Each view has its own keyboard shortcuts, press 'h' to open a "
+           "dialog to display them.\n\n"
+           "Common key bindings for all views:";
+  }
+
+  KeyHelp *WindowDelegateGetKeyHelp() override {
+    static curses::KeyHelp g_source_view_key_help[] = {
+        {'\t', "Select next view"},
+        {'h', "Show help dialog with view specific key bindings"},
+        {',', "Page up"},
+        {'.', "Page down"},
+        {KEY_UP, "Select previous"},
+        {KEY_DOWN, "Select next"},
+        {KEY_LEFT, "Unexpand or select parent"},
+        {KEY_RIGHT, "Expand"},
+        {KEY_PPAGE, "Page up"},
+        {KEY_NPAGE, "Page down"},
+        {'\0', nullptr}};
+    return g_source_view_key_help;
+  }
+
+  MenuActionResult MenuDelegateAction(Menu &menu) override {
+    switch (menu.GetIdentifier()) {
+    case eMenuID_ThreadStepIn: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive() &&
+            StateIsStoppedState(process->GetState(), true))
+          exe_ctx.GetThreadRef().StepIn(true);
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ThreadStepOut: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive() &&
+            StateIsStoppedState(process->GetState(), true))
+          exe_ctx.GetThreadRef().StepOut();
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ThreadStepOver: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive() &&
+            StateIsStoppedState(process->GetState(), true))
+          exe_ctx.GetThreadRef().StepOver(true);
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ProcessContinue: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasProcessScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive() &&
+            StateIsStoppedState(process->GetState(), true))
+          process->Resume();
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ProcessKill: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasProcessScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive())
+          process->Destroy(false);
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ProcessHalt: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasProcessScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive())
+          process->Halt();
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ProcessDetach: {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasProcessScope()) {
+        Process *process = exe_ctx.GetProcessPtr();
+        if (process && process->IsAlive())
+          process->Detach(false);
+      }
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_Process: {
+      // Populate the menu with all of the threads if the process is stopped
+      // when the Process menu gets selected and is about to display its
+      // submenu.
+      Menus &submenus = menu.GetSubmenus();
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      Process *process = exe_ctx.GetProcessPtr();
+      if (process && process->IsAlive() &&
+          StateIsStoppedState(process->GetState(), true)) {
+        if (submenus.size() == 7)
+          menu.AddSubmenu(MenuSP(new Menu(Menu::Type::Separator)));
+        else if (submenus.size() > 8)
+          submenus.erase(submenus.begin() + 8, submenus.end());
+
+        ThreadList &threads = process->GetThreadList();
+        std::lock_guard<std::recursive_mutex> guard(threads.GetMutex());
+        size_t num_threads = threads.GetSize();
+        for (size_t i = 0; i < num_threads; ++i) {
+          ThreadSP thread_sp = threads.GetThreadAtIndex(i);
+          char menu_char = '\0';
+          if (i < 9)
+            menu_char = '1' + i;
+          StreamString thread_menu_title;
+          thread_menu_title.Printf("Thread %u", thread_sp->GetIndexID());
+          const char *thread_name = thread_sp->GetName();
+          if (thread_name && thread_name[0])
+            thread_menu_title.Printf(" %s", thread_name);
+          else {
+            const char *queue_name = thread_sp->GetQueueName();
+            if (queue_name && queue_name[0])
+              thread_menu_title.Printf(" %s", queue_name);
+          }
+          menu.AddSubmenu(
+              MenuSP(new Menu(thread_menu_title.GetString().str().c_str(),
+                              nullptr, menu_char, thread_sp->GetID())));
+        }
+      } else if (submenus.size() > 7) {
+        // Remove the separator and any other thread submenu items that were
+        // previously added
+        submenus.erase(submenus.begin() + 7, submenus.end());
+      }
+      // Since we are adding and removing items we need to recalculate the name
+      // lengths
+      menu.RecalculateNameLengths();
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ViewVariables: {
+      WindowSP main_window_sp = m_app.GetMainWindow();
+      WindowSP source_window_sp = main_window_sp->FindSubWindow("Source");
+      WindowSP variables_window_sp = main_window_sp->FindSubWindow("Variables");
+      WindowSP registers_window_sp = main_window_sp->FindSubWindow("Registers");
+      const Rect source_bounds = source_window_sp->GetBounds();
+
+      if (variables_window_sp) {
+        const Rect variables_bounds = variables_window_sp->GetBounds();
+
+        main_window_sp->RemoveSubWindow(variables_window_sp.get());
+
+        if (registers_window_sp) {
+          // We have a registers window, so give all the area back to the
+          // registers window
+          Rect registers_bounds = variables_bounds;
+          registers_bounds.size.width = source_bounds.size.width;
+          registers_window_sp->SetBounds(registers_bounds);
+        } else {
+          // We have no registers window showing so give the bottom area back
+          // to the source view
+          source_window_sp->Resize(source_bounds.size.width,
+                                   source_bounds.size.height +
+                                       variables_bounds.size.height);
+        }
+      } else {
+        Rect new_variables_rect;
+        if (registers_window_sp) {
+          // We have a registers window so split the area of the registers
+          // window into two columns where the left hand side will be the
+          // variables and the right hand side will be the registers
+          const Rect variables_bounds = registers_window_sp->GetBounds();
+          Rect new_registers_rect;
+          variables_bounds.VerticalSplitPercentage(0.50, new_variables_rect,
+                                                   new_registers_rect);
+          registers_window_sp->SetBounds(new_registers_rect);
+        } else {
+          // No variables window, grab the bottom part of the source window
+          Rect new_source_rect;
+          source_bounds.HorizontalSplitPercentage(0.70, new_source_rect,
+                                                  new_variables_rect);
+          source_window_sp->SetBounds(new_source_rect);
+        }
+        WindowSP new_window_sp = main_window_sp->CreateSubWindow(
+            "Variables", new_variables_rect, false);
+        new_window_sp->SetDelegate(
+            WindowDelegateSP(new FrameVariablesWindowDelegate(m_debugger)));
+      }
+      touchwin(stdscr);
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_ViewRegisters: {
+      WindowSP main_window_sp = m_app.GetMainWindow();
+      WindowSP source_window_sp = main_window_sp->FindSubWindow("Source");
+      WindowSP variables_window_sp = main_window_sp->FindSubWindow("Variables");
+      WindowSP registers_window_sp = main_window_sp->FindSubWindow("Registers");
+      const Rect source_bounds = source_window_sp->GetBounds();
+
+      if (registers_window_sp) {
+        if (variables_window_sp) {
+          const Rect variables_bounds = variables_window_sp->GetBounds();
+
+          // We have a variables window, so give all the area back to the
+          // variables window
+          variables_window_sp->Resize(variables_bounds.size.width +
+                                          registers_window_sp->GetWidth(),
+                                      variables_bounds.size.height);
+        } else {
+          // We have no variables window showing so give the bottom area back
+          // to the source view
+          source_window_sp->Resize(source_bounds.size.width,
+                                   source_bounds.size.height +
+                                       registers_window_sp->GetHeight());
+        }
+        main_window_sp->RemoveSubWindow(registers_window_sp.get());
+      } else {
+        Rect new_regs_rect;
+        if (variables_window_sp) {
+          // We have a variables window, split it into two columns where the
+          // left hand side will be the variables and the right hand side will
+          // be the registers
+          const Rect variables_bounds = variables_window_sp->GetBounds();
+          Rect new_vars_rect;
+          variables_bounds.VerticalSplitPercentage(0.50, new_vars_rect,
+                                                   new_regs_rect);
+          variables_window_sp->SetBounds(new_vars_rect);
+        } else {
+          // No registers window, grab the bottom part of the source window
+          Rect new_source_rect;
+          source_bounds.HorizontalSplitPercentage(0.70, new_source_rect,
+                                                  new_regs_rect);
+          source_window_sp->SetBounds(new_source_rect);
+        }
+        WindowSP new_window_sp =
+            main_window_sp->CreateSubWindow("Registers", new_regs_rect, false);
+        new_window_sp->SetDelegate(
+            WindowDelegateSP(new RegistersWindowDelegate(m_debugger)));
+      }
+      touchwin(stdscr);
+    }
+      return MenuActionResult::Handled;
+
+    case eMenuID_HelpGUIHelp:
+      m_app.GetMainWindow()->CreateHelpSubwindow();
+      return MenuActionResult::Handled;
+
+    default:
+      break;
+    }
+
+    return MenuActionResult::NotHandled;
+  }
+
+protected:
+  Application &m_app;
+  Debugger &m_debugger;
+};
+
+class StatusBarWindowDelegate : public WindowDelegate {
+public:
+  StatusBarWindowDelegate(Debugger &debugger) : m_debugger(debugger) {
+    FormatEntity::Parse("Thread: ${thread.id%tid}", m_format);
+  }
+
+  ~StatusBarWindowDelegate() override = default;
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    ExecutionContext exe_ctx =
+        m_debugger.GetCommandInterpreter().GetExecutionContext();
+    Process *process = exe_ctx.GetProcessPtr();
+    Thread *thread = exe_ctx.GetThreadPtr();
+    StackFrame *frame = exe_ctx.GetFramePtr();
+    window.Erase();
+    window.SetBackground(2);
+    window.MoveCursor(0, 0);
+    if (process) {
+      const StateType state = process->GetState();
+      window.Printf("Process: %5" PRIu64 " %10s", process->GetID(),
+                    StateAsCString(state));
+
+      if (StateIsStoppedState(state, true)) {
+        StreamString strm;
+        if (thread && FormatEntity::Format(m_format, strm, nullptr, &exe_ctx,
+                                           nullptr, nullptr, false, false)) {
+          window.MoveCursor(40, 0);
+          window.PutCStringTruncated(strm.GetString().str().c_str(), 1);
+        }
+
+        window.MoveCursor(60, 0);
+        if (frame)
+          window.Printf("Frame: %3u  PC = 0x%16.16" PRIx64,
+                        frame->GetFrameIndex(),
+                        frame->GetFrameCodeAddress().GetOpcodeLoadAddress(
+                            exe_ctx.GetTargetPtr()));
+      } else if (state == eStateExited) {
+        const char *exit_desc = process->GetExitDescription();
+        const int exit_status = process->GetExitStatus();
+        if (exit_desc && exit_desc[0])
+          window.Printf(" with status = %i (%s)", exit_status, exit_desc);
+        else
+          window.Printf(" with status = %i", exit_status);
+      }
+    }
+    window.DeferredRefresh();
+    return true;
+  }
+
+protected:
+  Debugger &m_debugger;
+  FormatEntity::Entry m_format;
+};
+
+class SourceFileWindowDelegate : public WindowDelegate {
+public:
+  SourceFileWindowDelegate(Debugger &debugger)
+      : WindowDelegate(), m_debugger(debugger), m_sc(), m_file_sp(),
+        m_disassembly_scope(nullptr), m_disassembly_sp(), m_disassembly_range(),
+        m_title(), m_line_width(4), m_selected_line(0), m_pc_line(0),
+        m_stop_id(0), m_frame_idx(UINT32_MAX), m_first_visible_line(0),
+        m_min_x(0), m_min_y(0), m_max_x(0), m_max_y(0) {}
+
+  ~SourceFileWindowDelegate() override = default;
+
+  void Update(const SymbolContext &sc) { m_sc = sc; }
+
+  uint32_t NumVisibleLines() const { return m_max_y - m_min_y; }
+
+  const char *WindowDelegateGetHelpText() override {
+    return "Source/Disassembly window keyboard shortcuts:";
+  }
+
+  KeyHelp *WindowDelegateGetKeyHelp() override {
+    static curses::KeyHelp g_source_view_key_help[] = {
+        {KEY_RETURN, "Run to selected line with one shot breakpoint"},
+        {KEY_UP, "Select previous source line"},
+        {KEY_DOWN, "Select next source line"},
+        {KEY_PPAGE, "Page up"},
+        {KEY_NPAGE, "Page down"},
+        {'b', "Set breakpoint on selected source/disassembly line"},
+        {'c', "Continue process"},
+        {'d', "Detach and resume process"},
+        {'D', "Detach with process suspended"},
+        {'h', "Show help dialog"},
+        {'k', "Kill process"},
+        {'n', "Step over (source line)"},
+        {'N', "Step over (single instruction)"},
+        {'o', "Step out"},
+        {'s', "Step in (source line)"},
+        {'S', "Step in (single instruction)"},
+        {',', "Page up"},
+        {'.', "Page down"},
+        {'\0', nullptr}};
+    return g_source_view_key_help;
+  }
+
+  bool WindowDelegateDraw(Window &window, bool force) override {
+    ExecutionContext exe_ctx =
+        m_debugger.GetCommandInterpreter().GetExecutionContext();
+    Process *process = exe_ctx.GetProcessPtr();
+    Thread *thread = nullptr;
+
+    bool update_location = false;
+    if (process) {
+      StateType state = process->GetState();
+      if (StateIsStoppedState(state, true)) {
+        // We are stopped, so it is ok to
+        update_location = true;
+      }
+    }
+
+    m_min_x = 1;
+    m_min_y = 2;
+    m_max_x = window.GetMaxX() - 1;
+    m_max_y = window.GetMaxY() - 1;
+
+    const uint32_t num_visible_lines = NumVisibleLines();
+    StackFrameSP frame_sp;
+    bool set_selected_line_to_pc = false;
+
+    if (update_location) {
+      const bool process_alive = process ? process->IsAlive() : false;
+      bool thread_changed = false;
+      if (process_alive) {
+        thread = exe_ctx.GetThreadPtr();
+        if (thread) {
+          frame_sp = thread->GetSelectedFrame();
+          auto tid = thread->GetID();
+          thread_changed = tid != m_tid;
+          m_tid = tid;
+        } else {
+          if (m_tid != LLDB_INVALID_THREAD_ID) {
+            thread_changed = true;
+            m_tid = LLDB_INVALID_THREAD_ID;
+          }
+        }
+      }
+      const uint32_t stop_id = process ? process->GetStopID() : 0;
+      const bool stop_id_changed = stop_id != m_stop_id;
+      bool frame_changed = false;
+      m_stop_id = stop_id;
+      m_title.Clear();
+      if (frame_sp) {
+        m_sc = frame_sp->GetSymbolContext(eSymbolContextEverything);
+        if (m_sc.module_sp) {
+          m_title.Printf(
+              "%s", m_sc.module_sp->GetFileSpec().GetFilename().GetCString());
+          ConstString func_name = m_sc.GetFunctionName();
+          if (func_name)
+            m_title.Printf("`%s", func_name.GetCString());
+        }
+        const uint32_t frame_idx = frame_sp->GetFrameIndex();
+        frame_changed = frame_idx != m_frame_idx;
+        m_frame_idx = frame_idx;
+      } else {
+        m_sc.Clear(true);
+        frame_changed = m_frame_idx != UINT32_MAX;
+        m_frame_idx = UINT32_MAX;
+      }
+
+      const bool context_changed =
+          thread_changed || frame_changed || stop_id_changed;
+
+      if (process_alive) {
+        if (m_sc.line_entry.IsValid()) {
+          m_pc_line = m_sc.line_entry.line;
+          if (m_pc_line != UINT32_MAX)
+            --m_pc_line; // Convert to zero based line number...
+          // Update the selected line if the stop ID changed...
+          if (context_changed)
+            m_selected_line = m_pc_line;
+
+          if (m_file_sp && m_file_sp->FileSpecMatches(m_sc.line_entry.file)) {
+            // Same file, nothing to do, we should either have the lines or not
+            // (source file missing)
+            if (m_selected_line >= static_cast<size_t>(m_first_visible_line)) {
+              if (m_selected_line >= m_first_visible_line + num_visible_lines)
+                m_first_visible_line = m_selected_line - 10;
+            } else {
+              if (m_selected_line > 10)
+                m_first_visible_line = m_selected_line - 10;
+              else
+                m_first_visible_line = 0;
+            }
+          } else {
+            // File changed, set selected line to the line with the PC
+            m_selected_line = m_pc_line;
+            m_file_sp =
+                m_debugger.GetSourceManager().GetFile(m_sc.line_entry.file);
+            if (m_file_sp) {
+              const size_t num_lines = m_file_sp->GetNumLines();
+              m_line_width = 1;
+              for (size_t n = num_lines; n >= 10; n = n / 10)
+                ++m_line_width;
+
+              if (num_lines < num_visible_lines ||
+                  m_selected_line < num_visible_lines)
+                m_first_visible_line = 0;
+              else
+                m_first_visible_line = m_selected_line - 10;
+            }
+          }
+        } else {
+          m_file_sp.reset();
+        }
+
+        if (!m_file_sp || m_file_sp->GetNumLines() == 0) {
+          // Show disassembly
+          bool prefer_file_cache = false;
+          if (m_sc.function) {
+            if (m_disassembly_scope != m_sc.function) {
+              m_disassembly_scope = m_sc.function;
+              m_disassembly_sp = m_sc.function->GetInstructions(
+                  exe_ctx, nullptr, prefer_file_cache);
+              if (m_disassembly_sp) {
+                set_selected_line_to_pc = true;
+                m_disassembly_range = m_sc.function->GetAddressRange();
+              } else {
+                m_disassembly_range.Clear();
+              }
+            } else {
+              set_selected_line_to_pc = context_changed;
+            }
+          } else if (m_sc.symbol) {
+            if (m_disassembly_scope != m_sc.symbol) {
+              m_disassembly_scope = m_sc.symbol;
+              m_disassembly_sp = m_sc.symbol->GetInstructions(
+                  exe_ctx, nullptr, prefer_file_cache);
+              if (m_disassembly_sp) {
+                set_selected_line_to_pc = true;
+                m_disassembly_range.GetBaseAddress() =
+                    m_sc.symbol->GetAddress();
+                m_disassembly_range.SetByteSize(m_sc.symbol->GetByteSize());
+              } else {
+                m_disassembly_range.Clear();
+              }
+            } else {
+              set_selected_line_to_pc = context_changed;
+            }
+          }
+        }
+      } else {
+        m_pc_line = UINT32_MAX;
+      }
+    }
+
+    const int window_width = window.GetWidth();
+    window.Erase();
+    window.DrawTitleBox("Sources");
+    if (!m_title.GetString().empty()) {
+      window.AttributeOn(A_REVERSE);
+      window.MoveCursor(1, 1);
+      window.PutChar(' ');
+      window.PutCStringTruncated(m_title.GetString().str().c_str(), 1);
+      int x = window.GetCursorX();
+      if (x < window_width - 1) {
+        window.Printf("%*s", window_width - x - 1, "");
+      }
+      window.AttributeOff(A_REVERSE);
+    }
+
+    Target *target = exe_ctx.GetTargetPtr();
+    const size_t num_source_lines = GetNumSourceLines();
+    if (num_source_lines > 0) {
+      // Display source
+      BreakpointLines bp_lines;
+      if (target) {
+        BreakpointList &bp_list = target->GetBreakpointList();
+        const size_t num_bps = bp_list.GetSize();
+        for (size_t bp_idx = 0; bp_idx < num_bps; ++bp_idx) {
+          BreakpointSP bp_sp = bp_list.GetBreakpointAtIndex(bp_idx);
+          const size_t num_bps_locs = bp_sp->GetNumLocations();
+          for (size_t bp_loc_idx = 0; bp_loc_idx < num_bps_locs; ++bp_loc_idx) {
+            BreakpointLocationSP bp_loc_sp =
+                bp_sp->GetLocationAtIndex(bp_loc_idx);
+            LineEntry bp_loc_line_entry;
+            if (bp_loc_sp->GetAddress().CalculateSymbolContextLineEntry(
+                    bp_loc_line_entry)) {
+              if (m_file_sp->GetFileSpec() == bp_loc_line_entry.file) {
+                bp_lines.insert(bp_loc_line_entry.line);
+              }
+            }
+          }
+        }
+      }
+
+      const attr_t selected_highlight_attr = A_REVERSE;
+      const attr_t pc_highlight_attr = COLOR_PAIR(1);
+
+      for (size_t i = 0; i < num_visible_lines; ++i) {
+        const uint32_t curr_line = m_first_visible_line + i;
+        if (curr_line < num_source_lines) {
+          const int line_y = m_min_y + i;
+          window.MoveCursor(1, line_y);
+          const bool is_pc_line = curr_line == m_pc_line;
+          const bool line_is_selected = m_selected_line == curr_line;
+          // Highlight the line as the PC line first, then if the selected line
+          // isn't the same as the PC line, highlight it differently
+          attr_t highlight_attr = 0;
+          attr_t bp_attr = 0;
+          if (is_pc_line)
+            highlight_attr = pc_highlight_attr;
+          else if (line_is_selected)
+            highlight_attr = selected_highlight_attr;
+
+          if (bp_lines.find(curr_line + 1) != bp_lines.end())
+            bp_attr = COLOR_PAIR(2);
+
+          if (bp_attr)
+            window.AttributeOn(bp_attr);
+
+          window.Printf(" %*u ", m_line_width, curr_line + 1);
+
+          if (bp_attr)
+            window.AttributeOff(bp_attr);
+
+          window.PutChar(ACS_VLINE);
+          // Mark the line with the PC with a diamond
+          if (is_pc_line)
+            window.PutChar(ACS_DIAMOND);
+          else
+            window.PutChar(' ');
+
+          if (highlight_attr)
+            window.AttributeOn(highlight_attr);
+          const uint32_t line_len =
+              m_file_sp->GetLineLength(curr_line + 1, false);
+          if (line_len > 0)
+            window.PutCString(m_file_sp->PeekLineData(curr_line + 1), line_len);
+
+          if (is_pc_line && frame_sp &&
+              frame_sp->GetConcreteFrameIndex() == 0) {
+            StopInfoSP stop_info_sp;
+            if (thread)
+              stop_info_sp = thread->GetStopInfo();
+            if (stop_info_sp) {
+              const char *stop_description = stop_info_sp->GetDescription();
+              if (stop_description && stop_description[0]) {
+                size_t stop_description_len = strlen(stop_description);
+                int desc_x = window_width - stop_description_len - 16;
+                window.Printf("%*s", desc_x - window.GetCursorX(), "");
+                // window.MoveCursor(window_width - stop_description_len - 15,
+                // line_y);
+                window.Printf("<<< Thread %u: %s ", thread->GetIndexID(),
+                              stop_description);
+              }
+            } else {
+              window.Printf("%*s", window_width - window.GetCursorX() - 1, "");
+            }
+          }
+          if (highlight_attr)
+            window.AttributeOff(highlight_attr);
+        } else {
+          break;
+        }
+      }
+    } else {
+      size_t num_disassembly_lines = GetNumDisassemblyLines();
+      if (num_disassembly_lines > 0) {
+        // Display disassembly
+        BreakpointAddrs bp_file_addrs;
+        Target *target = exe_ctx.GetTargetPtr();
+        if (target) {
+          BreakpointList &bp_list = target->GetBreakpointList();
+          const size_t num_bps = bp_list.GetSize();
+          for (size_t bp_idx = 0; bp_idx < num_bps; ++bp_idx) {
+            BreakpointSP bp_sp = bp_list.GetBreakpointAtIndex(bp_idx);
+            const size_t num_bps_locs = bp_sp->GetNumLocations();
+            for (size_t bp_loc_idx = 0; bp_loc_idx < num_bps_locs;
+                 ++bp_loc_idx) {
+              BreakpointLocationSP bp_loc_sp =
+                  bp_sp->GetLocationAtIndex(bp_loc_idx);
+              LineEntry bp_loc_line_entry;
+              const lldb::addr_t file_addr =
+                  bp_loc_sp->GetAddress().GetFileAddress();
+              if (file_addr != LLDB_INVALID_ADDRESS) {
+                if (m_disassembly_range.ContainsFileAddress(file_addr))
+                  bp_file_addrs.insert(file_addr);
+              }
+            }
+          }
+        }
+
+        const attr_t selected_highlight_attr = A_REVERSE;
+        const attr_t pc_highlight_attr = COLOR_PAIR(1);
+
+        StreamString strm;
+
+        InstructionList &insts = m_disassembly_sp->GetInstructionList();
+        Address pc_address;
+
+        if (frame_sp)
+          pc_address = frame_sp->GetFrameCodeAddress();
+        const uint32_t pc_idx =
+            pc_address.IsValid()
+                ? insts.GetIndexOfInstructionAtAddress(pc_address)
+                : UINT32_MAX;
+        if (set_selected_line_to_pc) {
+          m_selected_line = pc_idx;
+        }
+
+        const uint32_t non_visible_pc_offset = (num_visible_lines / 5);
+        if (static_cast<size_t>(m_first_visible_line) >= num_disassembly_lines)
+          m_first_visible_line = 0;
+
+        if (pc_idx < num_disassembly_lines) {
+          if (pc_idx < static_cast<uint32_t>(m_first_visible_line) ||
+              pc_idx >= m_first_visible_line + num_visible_lines)
+            m_first_visible_line = pc_idx - non_visible_pc_offset;
+        }
+
+        for (size_t i = 0; i < num_visible_lines; ++i) {
+          const uint32_t inst_idx = m_first_visible_line + i;
+          Instruction *inst = insts.GetInstructionAtIndex(inst_idx).get();
+          if (!inst)
+            break;
+
+          const int line_y = m_min_y + i;
+          window.MoveCursor(1, line_y);
+          const bool is_pc_line = frame_sp && inst_idx == pc_idx;
+          const bool line_is_selected = m_selected_line == inst_idx;
+          // Highlight the line as the PC line first, then if the selected line
+          // isn't the same as the PC line, highlight it differently
+          attr_t highlight_attr = 0;
+          attr_t bp_attr = 0;
+          if (is_pc_line)
+            highlight_attr = pc_highlight_attr;
+          else if (line_is_selected)
+            highlight_attr = selected_highlight_attr;
+
+          if (bp_file_addrs.find(inst->GetAddress().GetFileAddress()) !=
+              bp_file_addrs.end())
+            bp_attr = COLOR_PAIR(2);
+
+          if (bp_attr)
+            window.AttributeOn(bp_attr);
+
+          window.Printf(" 0x%16.16llx ",
+                        static_cast<unsigned long long>(
+                            inst->GetAddress().GetLoadAddress(target)));
+
+          if (bp_attr)
+            window.AttributeOff(bp_attr);
+
+          window.PutChar(ACS_VLINE);
+          // Mark the line with the PC with a diamond
+          if (is_pc_line)
+            window.PutChar(ACS_DIAMOND);
+          else
+            window.PutChar(' ');
+
+          if (highlight_attr)
+            window.AttributeOn(highlight_attr);
+
+          const char *mnemonic = inst->GetMnemonic(&exe_ctx);
+          const char *operands = inst->GetOperands(&exe_ctx);
+          const char *comment = inst->GetComment(&exe_ctx);
+
+          if (mnemonic != nullptr && mnemonic[0] == '\0')
+            mnemonic = nullptr;
+          if (operands != nullptr && operands[0] == '\0')
+            operands = nullptr;
+          if (comment != nullptr && comment[0] == '\0')
+            comment = nullptr;
+
+          strm.Clear();
+
+          if (mnemonic != nullptr && operands != nullptr && comment != nullptr)
+            strm.Printf("%-8s %-25s ; %s", mnemonic, operands, comment);
+          else if (mnemonic != nullptr && operands != nullptr)
+            strm.Printf("%-8s %s", mnemonic, operands);
+          else if (mnemonic != nullptr)
+            strm.Printf("%s", mnemonic);
+
+          int right_pad = 1;
+          window.PutCStringTruncated(strm.GetData(), right_pad);
+
+          if (is_pc_line && frame_sp &&
+              frame_sp->GetConcreteFrameIndex() == 0) {
+            StopInfoSP stop_info_sp;
+            if (thread)
+              stop_info_sp = thread->GetStopInfo();
+            if (stop_info_sp) {
+              const char *stop_description = stop_info_sp->GetDescription();
+              if (stop_description && stop_description[0]) {
+                size_t stop_description_len = strlen(stop_description);
+                int desc_x = window_width - stop_description_len - 16;
+                window.Printf("%*s", desc_x - window.GetCursorX(), "");
+                // window.MoveCursor(window_width - stop_description_len - 15,
+                // line_y);
+                window.Printf("<<< Thread %u: %s ", thread->GetIndexID(),
+                              stop_description);
+              }
+            } else {
+              window.Printf("%*s", window_width - window.GetCursorX() - 1, "");
+            }
+          }
+          if (highlight_attr)
+            window.AttributeOff(highlight_attr);
+        }
+      }
+    }
+    window.DeferredRefresh();
+    return true; // Drawing handled
+  }
+
+  size_t GetNumLines() {
+    size_t num_lines = GetNumSourceLines();
+    if (num_lines == 0)
+      num_lines = GetNumDisassemblyLines();
+    return num_lines;
+  }
+
+  size_t GetNumSourceLines() const {
+    if (m_file_sp)
+      return m_file_sp->GetNumLines();
+    return 0;
+  }
+
+  size_t GetNumDisassemblyLines() const {
+    if (m_disassembly_sp)
+      return m_disassembly_sp->GetInstructionList().GetSize();
+    return 0;
+  }
+
+  HandleCharResult WindowDelegateHandleChar(Window &window, int c) override {
+    const uint32_t num_visible_lines = NumVisibleLines();
+    const size_t num_lines = GetNumLines();
+
+    switch (c) {
+    case ',':
+    case KEY_PPAGE:
+      // Page up key
+      if (static_cast<uint32_t>(m_first_visible_line) > num_visible_lines)
+        m_first_visible_line -= num_visible_lines;
+      else
+        m_first_visible_line = 0;
+      m_selected_line = m_first_visible_line;
+      return eKeyHandled;
+
+    case '.':
+    case KEY_NPAGE:
+      // Page down key
+      {
+        if (m_first_visible_line + num_visible_lines < num_lines)
+          m_first_visible_line += num_visible_lines;
+        else if (num_lines < num_visible_lines)
+          m_first_visible_line = 0;
+        else
+          m_first_visible_line = num_lines - num_visible_lines;
+        m_selected_line = m_first_visible_line;
+      }
+      return eKeyHandled;
+
+    case KEY_UP:
+      if (m_selected_line > 0) {
+        m_selected_line--;
+        if (static_cast<size_t>(m_first_visible_line) > m_selected_line)
+          m_first_visible_line = m_selected_line;
+      }
+      return eKeyHandled;
+
+    case KEY_DOWN:
+      if (m_selected_line + 1 < num_lines) {
+        m_selected_line++;
+        if (m_first_visible_line + num_visible_lines < m_selected_line)
+          m_first_visible_line++;
+      }
+      return eKeyHandled;
+
+    case '\r':
+    case '\n':
+    case KEY_ENTER:
+      // Set a breakpoint and run to the line using a one shot breakpoint
+      if (GetNumSourceLines() > 0) {
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasProcessScope() && exe_ctx.GetProcessRef().IsAlive()) {
+          BreakpointSP bp_sp = exe_ctx.GetTargetRef().CreateBreakpoint(
+              nullptr, // Don't limit the breakpoint to certain modules
+              m_file_sp->GetFileSpec(), // Source file
+              m_selected_line +
+                  1, // Source line number (m_selected_line is zero based)
+              0,     // Unspecified column.
+              0,     // No offset
+              eLazyBoolCalculate,  // Check inlines using global setting
+              eLazyBoolCalculate,  // Skip prologue using global setting,
+              false,               // internal
+              false,               // request_hardware
+              eLazyBoolCalculate); // move_to_nearest_code
+          // Make breakpoint one shot
+          bp_sp->GetOptions()->SetOneShot(true);
+          exe_ctx.GetProcessRef().Resume();
+        }
+      } else if (m_selected_line < GetNumDisassemblyLines()) {
+        const Instruction *inst = m_disassembly_sp->GetInstructionList()
+                                      .GetInstructionAtIndex(m_selected_line)
+                                      .get();
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasTargetScope()) {
+          Address addr = inst->GetAddress();
+          BreakpointSP bp_sp = exe_ctx.GetTargetRef().CreateBreakpoint(
+              addr,   // lldb_private::Address
+              false,  // internal
+              false); // request_hardware
+          // Make breakpoint one shot
+          bp_sp->GetOptions()->SetOneShot(true);
+          exe_ctx.GetProcessRef().Resume();
+        }
+      }
+      return eKeyHandled;
+
+    case 'b': // 'b' == toggle breakpoint on currently selected line
+      if (m_selected_line < GetNumSourceLines()) {
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasTargetScope()) {
+          BreakpointSP bp_sp = exe_ctx.GetTargetRef().CreateBreakpoint(
+              nullptr, // Don't limit the breakpoint to certain modules
+              m_file_sp->GetFileSpec(), // Source file
+              m_selected_line +
+                  1, // Source line number (m_selected_line is zero based)
+              0,     // No column specified.
+              0,     // No offset
+              eLazyBoolCalculate,  // Check inlines using global setting
+              eLazyBoolCalculate,  // Skip prologue using global setting,
+              false,               // internal
+              false,               // request_hardware
+              eLazyBoolCalculate); // move_to_nearest_code
+        }
+      } else if (m_selected_line < GetNumDisassemblyLines()) {
+        const Instruction *inst = m_disassembly_sp->GetInstructionList()
+                                      .GetInstructionAtIndex(m_selected_line)
+                                      .get();
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasTargetScope()) {
+          Address addr = inst->GetAddress();
+          BreakpointSP bp_sp = exe_ctx.GetTargetRef().CreateBreakpoint(
+              addr,   // lldb_private::Address
+              false,  // internal
+              false); // request_hardware
+        }
+      }
+      return eKeyHandled;
+
+    case 'd': // 'd' == detach and let run
+    case 'D': // 'D' == detach and keep stopped
+    {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasProcessScope())
+        exe_ctx.GetProcessRef().Detach(c == 'D');
+    }
+      return eKeyHandled;
+
+    case 'k':
+      // 'k' == kill
+      {
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasProcessScope())
+          exe_ctx.GetProcessRef().Destroy(false);
+      }
+      return eKeyHandled;
+
+    case 'c':
+      // 'c' == continue
+      {
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasProcessScope())
+          exe_ctx.GetProcessRef().Resume();
+      }
+      return eKeyHandled;
+
+    case 'o':
+      // 'o' == step out
+      {
+        ExecutionContext exe_ctx =
+            m_debugger.GetCommandInterpreter().GetExecutionContext();
+        if (exe_ctx.HasThreadScope() &&
+            StateIsStoppedState(exe_ctx.GetProcessRef().GetState(), true)) {
+          exe_ctx.GetThreadRef().StepOut();
+        }
+      }
+      return eKeyHandled;
+
+    case 'n': // 'n' == step over
+    case 'N': // 'N' == step over instruction
+    {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope() &&
+          StateIsStoppedState(exe_ctx.GetProcessRef().GetState(), true)) {
+        bool source_step = (c == 'n');
+        exe_ctx.GetThreadRef().StepOver(source_step);
+      }
+    }
+      return eKeyHandled;
+
+    case 's': // 's' == step into
+    case 'S': // 'S' == step into instruction
+    {
+      ExecutionContext exe_ctx =
+          m_debugger.GetCommandInterpreter().GetExecutionContext();
+      if (exe_ctx.HasThreadScope() &&
+          StateIsStoppedState(exe_ctx.GetProcessRef().GetState(), true)) {
+        bool source_step = (c == 's');
+        exe_ctx.GetThreadRef().StepIn(source_step);
+      }
+    }
+      return eKeyHandled;
+
+    case 'h':
+      window.CreateHelpSubwindow();
+      return eKeyHandled;
+
+    default:
+      break;
+    }
+    return eKeyNotHandled;
+  }
+
+protected:
+  typedef std::set<uint32_t> BreakpointLines;
+  typedef std::set<lldb::addr_t> BreakpointAddrs;
+
+  Debugger &m_debugger;
+  SymbolContext m_sc;
+  SourceManager::FileSP m_file_sp;
+  SymbolContextScope *m_disassembly_scope;
+  lldb::DisassemblerSP m_disassembly_sp;
+  AddressRange m_disassembly_range;
+  StreamString m_title;
+  lldb::user_id_t m_tid;
+  int m_line_width;
+  uint32_t m_selected_line; // The selected line
+  uint32_t m_pc_line;       // The line with the PC
+  uint32_t m_stop_id;
+  uint32_t m_frame_idx;
+  int m_first_visible_line;
+  int m_min_x;
+  int m_min_y;
+  int m_max_x;
+  int m_max_y;
+};
+
+DisplayOptions ValueObjectListDelegate::g_options = {true};
+
+IOHandlerCursesGUI::IOHandlerCursesGUI(Debugger &debugger)
+    : IOHandler(debugger, IOHandler::Type::Curses) {}
+
+void IOHandlerCursesGUI::Activate() {
+  IOHandler::Activate();
+  if (!m_app_ap) {
+    m_app_ap.reset(new Application(GetInputFILE(), GetOutputFILE()));
+
+    // This is both a window and a menu delegate
+    std::shared_ptr<ApplicationDelegate> app_delegate_sp(
+        new ApplicationDelegate(*m_app_ap, m_debugger));
+
+    MenuDelegateSP app_menu_delegate_sp =
+        std::static_pointer_cast<MenuDelegate>(app_delegate_sp);
+    MenuSP lldb_menu_sp(
+        new Menu("LLDB", "F1", KEY_F(1), ApplicationDelegate::eMenuID_LLDB));
+    MenuSP exit_menuitem_sp(
+        new Menu("Exit", nullptr, 'x', ApplicationDelegate::eMenuID_LLDBExit));
+    exit_menuitem_sp->SetCannedResult(MenuActionResult::Quit);
+    lldb_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "About LLDB", nullptr, 'a', ApplicationDelegate::eMenuID_LLDBAbout)));
+    lldb_menu_sp->AddSubmenu(MenuSP(new Menu(Menu::Type::Separator)));
+    lldb_menu_sp->AddSubmenu(exit_menuitem_sp);
+
+    MenuSP target_menu_sp(new Menu("Target", "F2", KEY_F(2),
+                                   ApplicationDelegate::eMenuID_Target));
+    target_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Create", nullptr, 'c', ApplicationDelegate::eMenuID_TargetCreate)));
+    target_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Delete", nullptr, 'd', ApplicationDelegate::eMenuID_TargetDelete)));
+
+    MenuSP process_menu_sp(new Menu("Process", "F3", KEY_F(3),
+                                    ApplicationDelegate::eMenuID_Process));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Attach", nullptr, 'a', ApplicationDelegate::eMenuID_ProcessAttach)));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Detach", nullptr, 'd', ApplicationDelegate::eMenuID_ProcessDetach)));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Launch", nullptr, 'l', ApplicationDelegate::eMenuID_ProcessLaunch)));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(Menu::Type::Separator)));
+    process_menu_sp->AddSubmenu(
+        MenuSP(new Menu("Continue", nullptr, 'c',
+                        ApplicationDelegate::eMenuID_ProcessContinue)));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Halt", nullptr, 'h', ApplicationDelegate::eMenuID_ProcessHalt)));
+    process_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Kill", nullptr, 'k', ApplicationDelegate::eMenuID_ProcessKill)));
+
+    MenuSP thread_menu_sp(new Menu("Thread", "F4", KEY_F(4),
+                                   ApplicationDelegate::eMenuID_Thread));
+    thread_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Step In", nullptr, 'i', ApplicationDelegate::eMenuID_ThreadStepIn)));
+    thread_menu_sp->AddSubmenu(
+        MenuSP(new Menu("Step Over", nullptr, 'v',
+                        ApplicationDelegate::eMenuID_ThreadStepOver)));
+    thread_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Step Out", nullptr, 'o', ApplicationDelegate::eMenuID_ThreadStepOut)));
+
+    MenuSP view_menu_sp(
+        new Menu("View", "F5", KEY_F(5), ApplicationDelegate::eMenuID_View));
+    view_menu_sp->AddSubmenu(
+        MenuSP(new Menu("Backtrace", nullptr, 'b',
+                        ApplicationDelegate::eMenuID_ViewBacktrace)));
+    view_menu_sp->AddSubmenu(
+        MenuSP(new Menu("Registers", nullptr, 'r',
+                        ApplicationDelegate::eMenuID_ViewRegisters)));
+    view_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "Source", nullptr, 's', ApplicationDelegate::eMenuID_ViewSource)));
+    view_menu_sp->AddSubmenu(
+        MenuSP(new Menu("Variables", nullptr, 'v',
+                        ApplicationDelegate::eMenuID_ViewVariables)));
+
+    MenuSP help_menu_sp(
+        new Menu("Help", "F6", KEY_F(6), ApplicationDelegate::eMenuID_Help));
+    help_menu_sp->AddSubmenu(MenuSP(new Menu(
+        "GUI Help", nullptr, 'g', ApplicationDelegate::eMenuID_HelpGUIHelp)));
+
+    m_app_ap->Initialize();
+    WindowSP &main_window_sp = m_app_ap->GetMainWindow();
+
+    MenuSP menubar_sp(new Menu(Menu::Type::Bar));
+    menubar_sp->AddSubmenu(lldb_menu_sp);
+    menubar_sp->AddSubmenu(target_menu_sp);
+    menubar_sp->AddSubmenu(process_menu_sp);
+    menubar_sp->AddSubmenu(thread_menu_sp);
+    menubar_sp->AddSubmenu(view_menu_sp);
+    menubar_sp->AddSubmenu(help_menu_sp);
+    menubar_sp->SetDelegate(app_menu_delegate_sp);
+
+    Rect content_bounds = main_window_sp->GetFrame();
+    Rect menubar_bounds = content_bounds.MakeMenuBar();
+    Rect status_bounds = content_bounds.MakeStatusBar();
+    Rect source_bounds;
+    Rect variables_bounds;
+    Rect threads_bounds;
+    Rect source_variables_bounds;
+    content_bounds.VerticalSplitPercentage(0.80, source_variables_bounds,
+                                           threads_bounds);
+    source_variables_bounds.HorizontalSplitPercentage(0.70, source_bounds,
+                                                      variables_bounds);
+
+    WindowSP menubar_window_sp =
+        main_window_sp->CreateSubWindow("Menubar", menubar_bounds, false);
+    // Let the menubar get keys if the active window doesn't handle the keys
+    // that are typed so it can respond to menubar key presses.
+    menubar_window_sp->SetCanBeActive(
+        false); // Don't let the menubar become the active window
+    menubar_window_sp->SetDelegate(menubar_sp);
+
+    WindowSP source_window_sp(
+        main_window_sp->CreateSubWindow("Source", source_bounds, true));
+    WindowSP variables_window_sp(
+        main_window_sp->CreateSubWindow("Variables", variables_bounds, false));
+    WindowSP threads_window_sp(
+        main_window_sp->CreateSubWindow("Threads", threads_bounds, false));
+    WindowSP status_window_sp(
+        main_window_sp->CreateSubWindow("Status", status_bounds, false));
+    status_window_sp->SetCanBeActive(
+        false); // Don't let the status bar become the active window
+    main_window_sp->SetDelegate(
+        std::static_pointer_cast<WindowDelegate>(app_delegate_sp));
+    source_window_sp->SetDelegate(
+        WindowDelegateSP(new SourceFileWindowDelegate(m_debugger)));
+    variables_window_sp->SetDelegate(
+        WindowDelegateSP(new FrameVariablesWindowDelegate(m_debugger)));
+    TreeDelegateSP thread_delegate_sp(new ThreadsTreeDelegate(m_debugger));
+    threads_window_sp->SetDelegate(WindowDelegateSP(
+        new TreeWindowDelegate(m_debugger, thread_delegate_sp)));
+    status_window_sp->SetDelegate(
+        WindowDelegateSP(new StatusBarWindowDelegate(m_debugger)));
+
+    // Show the main help window once the first time the curses GUI is launched
+    static bool g_showed_help = false;
+    if (!g_showed_help) {
+      g_showed_help = true;
+      main_window_sp->CreateHelpSubwindow();
+    }
+
+    init_pair(1, COLOR_WHITE, COLOR_BLUE);
+    init_pair(2, COLOR_BLACK, COLOR_WHITE);
+    init_pair(3, COLOR_MAGENTA, COLOR_WHITE);
+    init_pair(4, COLOR_MAGENTA, COLOR_BLACK);
+    init_pair(5, COLOR_RED, COLOR_BLACK);
+  }
+}
+
+void IOHandlerCursesGUI::Deactivate() { m_app_ap->Terminate(); }
+
+void IOHandlerCursesGUI::Run() {
+  m_app_ap->Run(m_debugger);
+  SetIsDone(true);
+}
+
+IOHandlerCursesGUI::~IOHandlerCursesGUI() = default;
+
+void IOHandlerCursesGUI::Cancel() {}
+
+bool IOHandlerCursesGUI::Interrupt() { return false; }
+
+void IOHandlerCursesGUI::GotEOF() {}
+
+#endif // LLDB_DISABLE_CURSES