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Keyboard reading modified #143

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Merged
rsanchez15 merged 1 commit into from
Sep 25, 2025
Merged

Keyboard reading modified #143

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135 changes: 135 additions & 0 deletions cpp_utils/src/cpp/event/StdinEventHandler.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,25 @@
#include <cpp_utils/exception/InitializationException.hpp>
#include <cpp_utils/Log.hpp>

namespace {
#if defined(_WIN32) || defined(_WIN64)
inline bool consume_tilde_if_present()
{
// Windows special keys don’t have a trailing '~'
return true;
}

#else
inline bool consume_tilde_if_present()
{
// POSIX: ESC [ <num> ~ → read and verify '~'
int t = getchar();
return t == '~';
}

#endif // if defined(_WIN32) || defined(_WIN64)
} // namespace

namespace eprosima {
namespace utils {
namespace event {
Expand Down Expand Up @@ -375,6 +394,122 @@ void StdinEventHandler::stdin_listener_thread_routine_() noexcept
break;
}

#if defined(_WIN32) || defined(_WIN64)
case 82: // Insert
#else
case '2': // Insert: ESC [ 2 ~
#endif // if defined(_WIN32) || defined(_WIN64)
{
int c3 = getchar(); (void)c3; // swallow trailing '~'
// Minimal behavior: do nothing
break;
}

#if defined(_WIN32) || defined(_WIN64)
case 83: // Supr
#else
case '3': // Supr: ESC [ 3 ~
#endif // if defined(_WIN32) || defined(_WIN64)
{
if (consume_tilde_if_present())
{
// delete-forward (char at cursor), if any
if (cursor_index < read_str.size())
{
update_line(">> ", read_str, cursor_index,
[](std::string& line, size_t& index)
{
if (index < line.size())
{
line.erase(line.begin() + index);
}
});
}
}
// do nothing.
break;
}

#if defined(_WIN32) || defined(_WIN64)
case 73: // Page Up
#else
case '5': // Page Up: ESC [ 5 ~ (history prev)
#endif // if defined(_WIN32) || defined(_WIN64)
{
if (consume_tilde_if_present())
{
std::string prev = history_handler_.get_previous_command();
if (!prev.empty())
{
std::string prompt = ">> ";
int term_width = get_terminal_width();
int lines = compute_lines_needed(prompt, read_str, term_width);
clear_lines(lines);
read_str = prev;
cursor_index = read_str.size();
std::cout << "\033[38;5;82m" << prompt << "\033[0m" << read_str << std::flush;
}
}
break;
}


#if defined(_WIN32) || defined(_WIN64)
case 81: // Page Down
#else
case '6': // Page Down: ESC [ 6 ~ (history next)
#endif // if defined(_WIN32) || defined(_WIN64)
{
if (consume_tilde_if_present())
{
std::string next = history_handler_.get_next_command();
std::string prompt = ">> ";
int term_width = get_terminal_width();
int lines = compute_lines_needed(prompt, read_str, term_width);
clear_lines(lines);
if (!next.empty())
{
read_str = next;
cursor_index = read_str.size();
std::cout << "\033[38;5;82m" << prompt << "\033[0m" << read_str << std::flush;
}
else
{
read_str.clear();
cursor_index = 0;
std::cout << "\033[38;5;82m" << prompt << "\033[0m" << std::flush;
}
}
break;
}

#if defined(_WIN32) || defined(_WIN64)
case 71: // Home
#else
case 'H': // Home: ESC [ H
#endif // if defined(_WIN32) || defined(_WIN64)
{
update_line(">> ", read_str, cursor_index,
[](std::string&, size_t& index)
{
index = 0;
});
break;
}

#if defined(_WIN32) || defined(_WIN64)
case 79: // End
#else
case 'F': // End: ESC [ F
#endif // if defined(_WIN32) || defined(_WIN64)
{
update_line(">> ", read_str, cursor_index,
[](std::string& line, size_t& index)
{
index = line.size();
});
break;
}
}
}
else if (c == '\n' || c == '\r')
Expand Down