diff options
Diffstat (limited to 'contrib/replxx/src/replxx_impl.cxx')
| -rw-r--r-- | contrib/replxx/src/replxx_impl.cxx | 1984 |
1 files changed, 1984 insertions, 0 deletions
diff --git a/contrib/replxx/src/replxx_impl.cxx b/contrib/replxx/src/replxx_impl.cxx new file mode 100644 index 000000000..14f3cbd4d --- /dev/null +++ b/contrib/replxx/src/replxx_impl.cxx @@ -0,0 +1,1984 @@ +#include <algorithm> +#include <memory> +#include <cerrno> +#include <iostream> + +#ifdef _WIN32 + +#include <windows.h> +#include <io.h> +#if _MSC_VER < 1900 +#define snprintf _snprintf // Microsoft headers use underscores in some names +#endif +#define strcasecmp _stricmp +#define write _write +#define STDIN_FILENO 0 + +#else /* _WIN32 */ + +#include <unistd.h> +#include <signal.h> + +#endif /* _WIN32 */ + +#ifdef _WIN32 +#include "windows.hxx" +#endif + +#include "replxx_impl.hxx" +#include "utf8string.hxx" +#include "prompt.hxx" +#include "util.hxx" +#include "io.hxx" +#include "history.hxx" +#include "replxx.hxx" + +using namespace std; + +namespace replxx { + +#ifndef _WIN32 + +bool gotResize = false; + +#endif + +namespace { + +static int const REPLXX_MAX_HINT_ROWS( 4 ); +/* + * All whitespaces and all non-alphanumerical characters from ASCII range + * with an exception of an underscore ('_'). + */ +char const defaultBreakChars[] = " \t\v\f\a\b\r\n`~!@#$%^&*()-=+[{]}\\|;:'\",<.>/?"; + +#ifndef _WIN32 + +static void WindowSizeChanged(int) { + // do nothing here but setting this flag + gotResize = true; +} + +#endif + +static const char* unsupported_term[] = {"dumb", "cons25", "emacs", NULL}; + +static bool isUnsupportedTerm(void) { + char* term = getenv("TERM"); + if (term == NULL) { + return false; + } + for (int j = 0; unsupported_term[j]; ++j) { + if (!strcasecmp(term, unsupported_term[j])) { + return true; + } + } + return false; +} + +} + +Replxx::ReplxxImpl::ReplxxImpl( FILE*, FILE*, FILE* ) + : _utf8Buffer() + , _data() + , _charWidths() + , _display() + , _displayInputLength( 0 ) + , _hint() + , _pos( 0 ) + , _prefix( 0 ) + , _hintSelection( -1 ) + , _history() + , _killRing() + , _maxHintRows( REPLXX_MAX_HINT_ROWS ) + , _hintDelay( 0 ) + , _breakChars( defaultBreakChars ) + , _completionCountCutoff( 100 ) + , _overwrite( false ) + , _doubleTabCompletion( false ) + , _completeOnEmpty( true ) + , _beepOnAmbiguousCompletion( false ) + , _noColor( false ) + , _keyPressHandlers() + , _terminal() + , _currentThread() + , _prompt( _terminal ) + , _completionCallback( nullptr ) + , _highlighterCallback( nullptr ) + , _hintCallback( nullptr ) + , _keyPresses() + , _messages() + , _completions() + , _completionContextLength( 0 ) + , _completionSelection( -1 ) + , _preloadedBuffer() + , _errorMessage() + , _modifiedState( false ) + , _mutex() { + using namespace std::placeholders; + bind_key( Replxx::KEY::control( 'A' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_BEGINING_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::HOME + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_BEGINING_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'E' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_END_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::END + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_END_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'B' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_LEFT, _1 ) ); + bind_key( Replxx::KEY::LEFT + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_LEFT, _1 ) ); + bind_key( Replxx::KEY::control( 'F' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_RIGHT, _1 ) ); + bind_key( Replxx::KEY::RIGHT + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_RIGHT, _1 ) ); + bind_key( Replxx::KEY::meta( 'b' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT, _1 ) ); + bind_key( Replxx::KEY::meta( 'B' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT, _1 ) ); + bind_key( Replxx::KEY::control( Replxx::KEY::LEFT ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT, _1 ) ); + bind_key( Replxx::KEY::meta( Replxx::KEY::LEFT ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT, _1 ) ); // Emacs allows Meta, readline don't + bind_key( Replxx::KEY::meta( 'f' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT, _1 ) ); + bind_key( Replxx::KEY::meta( 'F' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT, _1 ) ); + bind_key( Replxx::KEY::control( Replxx::KEY::RIGHT ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT, _1 ) ); + bind_key( Replxx::KEY::meta( Replxx::KEY::RIGHT ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT, _1 ) ); // Emacs allows Meta, readline don't + bind_key( Replxx::KEY::meta( Replxx::KEY::BACKSPACE ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_WHITESPACE_ON_LEFT, _1 ) ); + bind_key( Replxx::KEY::meta( 'd' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'D' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_WORD, _1 ) ); + bind_key( Replxx::KEY::control( 'W' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_BEGINING_OF_WORD, _1 ) ); + bind_key( Replxx::KEY::control( 'U' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_BEGINING_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'K' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'Y' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK, _1 ) ); + bind_key( Replxx::KEY::meta( 'y' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK_CYCLE, _1 ) ); + bind_key( Replxx::KEY::meta( 'Y' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK_CYCLE, _1 ) ); + bind_key( Replxx::KEY::meta( 'c' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CAPITALIZE_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'C' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CAPITALIZE_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'l' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::LOWERCASE_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'L' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::LOWERCASE_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'u' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::UPPERCASE_WORD, _1 ) ); + bind_key( Replxx::KEY::meta( 'U' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::UPPERCASE_WORD, _1 ) ); + bind_key( Replxx::KEY::control( 'T' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::TRANSPOSE_CHARACTERS, _1 ) ); + bind_key( Replxx::KEY::control( 'C' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::ABORT_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'D' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::SEND_EOF, _1 ) ); + bind_key( Replxx::KEY::INSERT + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::TOGGLE_OVERWRITE_MODE, _1 ) ); + bind_key( 127, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::DELETE_CHARACTER_UNDER_CURSOR, _1 ) ); + bind_key( Replxx::KEY::DELETE + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::DELETE_CHARACTER_UNDER_CURSOR, _1 ) ); + bind_key( Replxx::KEY::BACKSPACE + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::DELETE_CHARACTER_LEFT_OF_CURSOR, _1 ) ); + bind_key( Replxx::KEY::control( 'J' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMMIT_LINE, _1 ) ); + bind_key( Replxx::KEY::ENTER + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMMIT_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'L' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CLEAR_SCREEN, _1 ) ); + bind_key( Replxx::KEY::control( 'N' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_NEXT, _1 ) ); + bind_key( Replxx::KEY::control( 'P' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_PREVIOUS, _1 ) ); + bind_key( Replxx::KEY::DOWN + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_NEXT, _1 ) ); + bind_key( Replxx::KEY::UP + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_PREVIOUS, _1 ) ); + bind_key( Replxx::KEY::meta( '>' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_LAST, _1 ) ); + bind_key( Replxx::KEY::meta( '<' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_FIRST, _1 ) ); + bind_key( Replxx::KEY::PAGE_DOWN + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_LAST, _1 ) ); + bind_key( Replxx::KEY::PAGE_UP + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_FIRST, _1 ) ); + bind_key( Replxx::KEY::control( Replxx::KEY::UP ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HINT_PREVIOUS, _1 ) ); + bind_key( Replxx::KEY::control( Replxx::KEY::DOWN ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HINT_NEXT, _1 ) ); +#ifndef _WIN32 + bind_key( Replxx::KEY::control( 'V' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::VERBATIM_INSERT, _1 ) ); + bind_key( Replxx::KEY::control( 'Z' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::SUSPEND, _1 ) ); +#endif + bind_key( Replxx::KEY::TAB + 0, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_LINE, _1 ) ); + bind_key( Replxx::KEY::control( 'R' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_INCREMENTAL_SEARCH, _1 ) ); + bind_key( Replxx::KEY::control( 'S' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_INCREMENTAL_SEARCH, _1 ) ); + bind_key( Replxx::KEY::meta( 'p' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH, _1 ) ); + bind_key( Replxx::KEY::meta( 'P' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH, _1 ) ); + bind_key( Replxx::KEY::meta( 'n' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH, _1 ) ); + bind_key( Replxx::KEY::meta( 'N' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH, _1 ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::invoke( Replxx::ACTION action_, char32_t code ) { + switch ( action_ ) { + case ( Replxx::ACTION::INSERT_CHARACTER ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::insert_character, code ) ); + case ( Replxx::ACTION::DELETE_CHARACTER_UNDER_CURSOR ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::delete_character, code ) ); + case ( Replxx::ACTION::DELETE_CHARACTER_LEFT_OF_CURSOR ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::backspace_character, code ) ); + case ( Replxx::ACTION::KILL_TO_END_OF_LINE ): return ( action( WANT_REFRESH | SET_KILL_ACTION, &Replxx::ReplxxImpl::kill_to_end_of_line, code ) ); + case ( Replxx::ACTION::KILL_TO_BEGINING_OF_LINE ): return ( action( SET_KILL_ACTION, &Replxx::ReplxxImpl::kill_to_begining_of_line, code ) ); + case ( Replxx::ACTION::KILL_TO_END_OF_WORD ): return ( action( SET_KILL_ACTION, &Replxx::ReplxxImpl::kill_word_to_right, code ) ); + case ( Replxx::ACTION::KILL_TO_BEGINING_OF_WORD ): return ( action( SET_KILL_ACTION, &Replxx::ReplxxImpl::kill_word_to_left, code ) ); + case ( Replxx::ACTION::KILL_TO_WHITESPACE_ON_LEFT ): return ( action( SET_KILL_ACTION, &Replxx::ReplxxImpl::kill_to_whitespace_to_left, code ) ); + case ( Replxx::ACTION::YANK ): return ( action( NOOP, &Replxx::ReplxxImpl::yank, code ) ); + case ( Replxx::ACTION::YANK_CYCLE ): return ( action( NOOP, &Replxx::ReplxxImpl::yank_cycle, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_TO_BEGINING_OF_LINE ): return ( action( WANT_REFRESH, &Replxx::ReplxxImpl::go_to_begining_of_line, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_TO_END_OF_LINE ): return ( action( WANT_REFRESH, &Replxx::ReplxxImpl::go_to_end_of_line, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_word_left, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_word_right, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_LEFT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_char_left, code ) ); + case ( Replxx::ACTION::MOVE_CURSOR_RIGHT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_char_right, code ) ); + case ( Replxx::ACTION::HISTORY_NEXT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::history_next, code ) ); + case ( Replxx::ACTION::HISTORY_PREVIOUS ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::history_previous, code ) ); + case ( Replxx::ACTION::HISTORY_FIRST ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::history_first, code ) ); + case ( Replxx::ACTION::HISTORY_LAST ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::history_last, code ) ); + case ( Replxx::ACTION::HISTORY_INCREMENTAL_SEARCH ): return ( action( NOOP, &Replxx::ReplxxImpl::incremental_history_search, code ) ); + case ( Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH ): return ( action( RESET_KILL_ACTION | DONT_RESET_PREFIX, &Replxx::ReplxxImpl::common_prefix_search, code ) ); + case ( Replxx::ACTION::HINT_NEXT ): return ( action( NOOP, &Replxx::ReplxxImpl::hint_next, code ) ); + case ( Replxx::ACTION::HINT_PREVIOUS ): return ( action( NOOP, &Replxx::ReplxxImpl::hint_previous, code ) ); + case ( Replxx::ACTION::CAPITALIZE_WORD ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::capitalize_word, code ) ); + case ( Replxx::ACTION::LOWERCASE_WORD ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::lowercase_word, code ) ); + case ( Replxx::ACTION::UPPERCASE_WORD ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::uppercase_word, code ) ); + case ( Replxx::ACTION::TRANSPOSE_CHARACTERS ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::transpose_characters, code ) ); + case ( Replxx::ACTION::TOGGLE_OVERWRITE_MODE ): return ( action( NOOP, &Replxx::ReplxxImpl::toggle_overwrite_mode, code ) ); +#ifndef _WIN32 + case ( Replxx::ACTION::VERBATIM_INSERT ): return ( action( WANT_REFRESH | RESET_KILL_ACTION, &Replxx::ReplxxImpl::verbatim_insert, code ) ); + case ( Replxx::ACTION::SUSPEND ): return ( action( WANT_REFRESH, &Replxx::ReplxxImpl::suspend, code ) ); +#endif + case ( Replxx::ACTION::CLEAR_SCREEN ): return ( action( NOOP, &Replxx::ReplxxImpl::clear_screen, code ) ); + case ( Replxx::ACTION::CLEAR_SELF ): clear_self_to_end_of_screen(); return ( Replxx::ACTION_RESULT::CONTINUE ); + case ( Replxx::ACTION::REPAINT ): repaint(); return ( Replxx::ACTION_RESULT::CONTINUE ); + case ( Replxx::ACTION::COMPLETE_LINE ): return ( action( NOOP, &Replxx::ReplxxImpl::complete_line, code ) ); + case ( Replxx::ACTION::COMPLETE_NEXT ): return ( action( DONT_RESET_COMPLETIONS, &Replxx::ReplxxImpl::complete_next, code ) ); + case ( Replxx::ACTION::COMPLETE_PREVIOUS ): return ( action( DONT_RESET_COMPLETIONS, &Replxx::ReplxxImpl::complete_previous, code ) ); + case ( Replxx::ACTION::COMMIT_LINE ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::commit_line, code ) ); + case ( Replxx::ACTION::ABORT_LINE ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::abort_line, code ) ); + case ( Replxx::ACTION::SEND_EOF ): return ( action( NOOP, &Replxx::ReplxxImpl::send_eof, code ) ); + } + return ( Replxx::ACTION_RESULT::BAIL ); +} + +void Replxx::ReplxxImpl::bind_key( char32_t code_, Replxx::key_press_handler_t handler_ ) { + _keyPressHandlers[code_] = handler_; +} + +Replxx::State Replxx::ReplxxImpl::get_state( void ) const { + _utf8Buffer.assign( _data ); + return ( Replxx::State( _utf8Buffer.get(), _pos ) ); +} + +void Replxx::ReplxxImpl::set_state( Replxx::State const& state_ ) { + _data.assign( state_.text() ); + if ( state_.cursor_position() >= 0 ) { + _pos = min( state_.cursor_position(), _data.length() ); + } + _modifiedState = true; +} + +char32_t Replxx::ReplxxImpl::read_char( HINT_ACTION hintAction_ ) { + /* try scheduled key presses */ { + std::lock_guard<std::mutex> l( _mutex ); + if ( !_keyPresses.empty() ) { + char32_t keyPress( _keyPresses.front() ); + _keyPresses.pop_front(); + return ( keyPress ); + } + } + int hintDelay( hintAction_ != HINT_ACTION::SKIP ? _hintDelay : 0 ); + while ( true ) { + Terminal::EVENT_TYPE eventType( _terminal.wait_for_input( hintDelay ) ); + if ( eventType == Terminal::EVENT_TYPE::TIMEOUT ) { + refresh_line( HINT_ACTION::REPAINT ); + hintDelay = 0; + continue; + } + if ( eventType == Terminal::EVENT_TYPE::KEY_PRESS ) { + break; + } + std::lock_guard<std::mutex> l( _mutex ); + clear_self_to_end_of_screen(); + while ( ! _messages.empty() ) { + string const& message( _messages.front() ); + _terminal.write8( message.data(), message.length() ); + _messages.pop_front(); + } + repaint(); + } + /* try scheduled key presses */ { + std::lock_guard<std::mutex> l( _mutex ); + if ( !_keyPresses.empty() ) { + char32_t keyPress( _keyPresses.front() ); + _keyPresses.pop_front(); + return ( keyPress ); + } + } + return ( _terminal.read_char() ); +} + +void Replxx::ReplxxImpl::clear( void ) { + _pos = 0; + _prefix = 0; + _completions.clear(); + _completionContextLength = 0; + _completionSelection = -1; + _data.clear(); + _hintSelection = -1; + _hint = UnicodeString(); + _display.clear(); + _displayInputLength = 0; +} + +Replxx::ReplxxImpl::completions_t Replxx::ReplxxImpl::call_completer( std::string const& input, int& contextLen_ ) const { + Replxx::completions_t completionsIntermediary( + !! _completionCallback + ? _completionCallback( input, contextLen_ ) + : Replxx::completions_t() + ); + completions_t completions; + completions.reserve( completionsIntermediary.size() ); + for ( Replxx::Completion const& c : completionsIntermediary ) { + completions.emplace_back( c ); + } + return ( completions ); +} + +Replxx::ReplxxImpl::hints_t Replxx::ReplxxImpl::call_hinter( std::string const& input, int& contextLen, Replxx::Color& color ) const { + Replxx::hints_t hintsIntermediary( + !! _hintCallback + ? _hintCallback( input, contextLen, color ) + : Replxx::hints_t() + ); + hints_t hints; + hints.reserve( hintsIntermediary.size() ); + for ( std::string const& h : hintsIntermediary ) { + hints.emplace_back( h.c_str() ); + } + return ( hints ); +} + +void Replxx::ReplxxImpl::set_preload_buffer( std::string const& preloadText ) { + _preloadedBuffer = preloadText; + // remove characters that won't display correctly + bool controlsStripped = false; + int whitespaceSeen( 0 ); + for ( std::string::iterator it( _preloadedBuffer.begin() ); it != _preloadedBuffer.end(); ) { + unsigned char c = *it; + if ( '\r' == c ) { // silently skip CR + _preloadedBuffer.erase( it, it + 1 ); + continue; + } + if ( ( '\n' == c ) || ( '\t' == c ) ) { // note newline or tab + ++ whitespaceSeen; + ++ it; + continue; + } + if ( whitespaceSeen > 0 ) { + it -= whitespaceSeen; + *it = ' '; + _preloadedBuffer.erase( it + 1, it + whitespaceSeen - 1 ); + } + if ( is_control_code( c ) ) { // remove other control characters, flag for message + controlsStripped = true; + if ( whitespaceSeen > 0 ) { + _preloadedBuffer.erase( it, it + 1 ); + -- it; + } else { + *it = ' '; + } + } + whitespaceSeen = 0; + ++ it; + } + if ( whitespaceSeen > 0 ) { + std::string::iterator it = _preloadedBuffer.end() - whitespaceSeen; + *it = ' '; + if ( whitespaceSeen > 1 ) { + _preloadedBuffer.erase( it + 1, _preloadedBuffer.end() ); + } + } + _errorMessage.clear(); + if ( controlsStripped ) { + _errorMessage.assign( " [Edited line: control characters were converted to spaces]\n" ); + } +} + +char const* Replxx::ReplxxImpl::read_from_stdin( void ) { + if ( _preloadedBuffer.empty() ) { + getline( cin, _preloadedBuffer ); + if ( ! cin.good() ) { + return nullptr; + } + } + while ( ! _preloadedBuffer.empty() && ( ( _preloadedBuffer.back() == '\r' ) || ( _preloadedBuffer.back() == '\n' ) ) ) { + _preloadedBuffer.pop_back(); + } + _utf8Buffer.assign( _preloadedBuffer ); + _preloadedBuffer.clear(); + return _utf8Buffer.get(); +} + +void Replxx::ReplxxImpl::emulate_key_press( char32_t keyCode_ ) { + std::lock_guard<std::mutex> l( _mutex ); + _keyPresses.push_back( keyCode_ ); + if ( ( _currentThread != std::thread::id() ) && ( _currentThread != std::this_thread::get_id() ) ) { + _terminal.notify_event( Terminal::EVENT_TYPE::KEY_PRESS ); + } +} + +char const* Replxx::ReplxxImpl::input( std::string const& prompt ) { +#ifndef _WIN32 + gotResize = false; +#endif + try { + errno = 0; + if ( ! tty::in ) { // input not from a terminal, we should work with piped input, i.e. redirected stdin + return ( read_from_stdin() ); + } + if (!_errorMessage.empty()) { + printf("%s", _errorMessage.c_str()); + fflush(stdout); + _errorMessage.clear(); + } + if ( isUnsupportedTerm() ) { + cout << prompt << flush; + fflush(stdout); + return ( read_from_stdin() ); + } + if (_terminal.enable_raw_mode() == -1) { + return nullptr; + } + _prompt.set_text( UnicodeString( prompt ) ); + _currentThread = std::this_thread::get_id(); + clear(); + if (!_preloadedBuffer.empty()) { + preload_puffer(_preloadedBuffer.c_str()); + _preloadedBuffer.clear(); + } + if ( get_input_line() == -1 ) { + return ( finalize_input( nullptr ) ); + } + printf("\n"); + _utf8Buffer.assign( _data ); + return ( finalize_input( _utf8Buffer.get() ) ); + } catch ( std::exception const& ) { + return ( finalize_input( nullptr ) ); + } +} + +char const* Replxx::ReplxxImpl::finalize_input( char const* retVal_ ) { + _currentThread = std::thread::id(); + _terminal.disable_raw_mode(); + return ( retVal_ ); +} + +int Replxx::ReplxxImpl::install_window_change_handler( void ) { +#ifndef _WIN32 + struct sigaction sa; + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = &WindowSizeChanged; + + if (sigaction(SIGWINCH, &sa, nullptr) == -1) { + return errno; + } +#endif + return 0; +} + +void Replxx::ReplxxImpl::print( char const* str_, int size_ ) { + if ( ( _currentThread == std::thread::id() ) || ( _currentThread == std::this_thread::get_id() ) ) { + _terminal.write8( str_, size_ ); + } else { + std::lock_guard<std::mutex> l( _mutex ); + _messages.emplace_back( str_, size_ ); + _terminal.notify_event( Terminal::EVENT_TYPE::MESSAGE ); + } + return; +} + +void Replxx::ReplxxImpl::preload_puffer(const char* preloadText) { + _data.assign( preloadText ); + _charWidths.resize( _data.length() ); + recompute_character_widths( _data.get(), _charWidths.data(), _data.length() ); + _prefix = _pos = _data.length(); +} + +void Replxx::ReplxxImpl::set_color( Replxx::Color color_ ) { + char const* code( ansi_color( color_ ) ); + while ( *code ) { + _display.push_back( *code ); + ++ code; + } +} + +void Replxx::ReplxxImpl::render( char32_t ch ) { + if ( ch == Replxx::KEY::ESCAPE ) { + _display.push_back( '^' ); + _display.push_back( '[' ); + } else if ( is_control_code( ch ) ) { + _display.push_back( '^' ); + _display.push_back( ch + 0x40 ); + } else { + _display.push_back( ch ); + } + return; +} + +void Replxx::ReplxxImpl::render( HINT_ACTION hintAction_ ) { + if ( hintAction_ == HINT_ACTION::TRIM ) { + _display.erase( _display.begin() + _displayInputLength, _display.end() ); + return; + } + if ( hintAction_ == HINT_ACTION::SKIP ) { + return; + } + _display.clear(); + if ( _noColor ) { + for ( char32_t ch : _data ) { + render( ch ); + } + _displayInputLength = _display.size(); + return; + } + Replxx::colors_t colors( _data.length(), Replxx::Color::DEFAULT ); + _utf8Buffer.assign( _data ); + if ( !! _highlighterCallback ) { + _highlighterCallback( _utf8Buffer.get(), colors ); + } + paren_info_t pi( matching_paren() ); + if ( pi.index != -1 ) { + colors[pi.index] = pi.error ? Replxx::Color::ERROR : Replxx::Color::BRIGHTRED; + } + Replxx::Color c( Replxx::Color::DEFAULT ); + for ( int i( 0 ); i < _data.length(); ++ i ) { + if ( colors[i] != c ) { + c = colors[i]; + set_color( c ); + } + render( _data[i] ); + } + set_color( Replxx::Color::DEFAULT ); + _displayInputLength = _display.size(); + _modifiedState = false; + return; +} + +int Replxx::ReplxxImpl::handle_hints( HINT_ACTION hintAction_ ) { + if ( _noColor ) { + return ( 0 ); + } + if ( ! _hintCallback ) { + return ( 0 ); + } + if ( ( _hintDelay > 0 ) && ( hintAction_ != HINT_ACTION::REPAINT ) ) { + _hintSelection = -1; + return ( 0 ); + } + if ( ( hintAction_ == HINT_ACTION::SKIP ) || ( hintAction_ == HINT_ACTION::TRIM ) ) { + return ( 0 ); + } + if ( _pos != _data.length() ) { + return ( 0 ); + } + _hint = UnicodeString(); + int len( 0 ); + if ( hintAction_ == HINT_ACTION::REGENERATE ) { + _hintSelection = -1; + } + Replxx::Color c( Replxx::Color::GRAY ); + _utf8Buffer.assign( _data, _pos ); + int contextLen( context_length() ); + Replxx::ReplxxImpl::hints_t hints( call_hinter( _utf8Buffer.get(), contextLen, c ) ); + int hintCount( hints.size() ); + if ( hintCount == 1 ) { + _hint = hints.front(); + len = _hint.length() - contextLen; + if ( len > 0 ) { + set_color( c ); + for ( int i( 0 ); i < len; ++ i ) { + _display.push_back( _hint[i + contextLen] ); + } + set_color( Replxx::Color::DEFAULT ); + } + } else if ( ( _maxHintRows > 0 ) && ( hintCount > 0 ) ) { + int startCol( _prompt._indentation + _pos - contextLen ); + int maxCol( _prompt.screen_columns() ); +#ifdef _WIN32 + -- maxCol; +#endif + if ( _hintSelection < -1 ) { + _hintSelection = hintCount - 1; + } else if ( _hintSelection >= hintCount ) { + _hintSelection = -1; + } + if ( _hintSelection != -1 ) { + _hint = hints[_hintSelection]; + len = min<int>( _hint.length(), maxCol - startCol - _data.length() ); + if ( contextLen < len ) { + set_color( c ); + for ( int i( contextLen ); i < len; ++ i ) { + _display.push_back( _hint[i] ); + } + set_color( Replxx::Color::DEFAULT ); + } + } + for ( int hintRow( 0 ); hintRow < min( hintCount, _maxHintRows ); ++ hintRow ) { +#ifdef _WIN32 + _display.push_back( '\r' ); +#endif + _display.push_back( '\n' ); + int col( 0 ); + for ( int i( 0 ); ( i < startCol ) && ( col < maxCol ); ++ i, ++ col ) { + _display.push_back( ' ' ); + } + set_color( c ); + for ( int i( _pos - contextLen ); ( i < _pos ) && ( col < maxCol ); ++ i, ++ col ) { + _display.push_back( _data[i] ); + } + int hintNo( hintRow + _hintSelection + 1 ); + if ( hintNo == hintCount ) { + continue; + } else if ( hintNo > hintCount ) { + -- hintNo; + } + UnicodeString const& h( hints[hintNo % hintCount] ); + for ( int i( contextLen ); ( i < h.length() ) && ( col < maxCol ); ++ i, ++ col ) { + _display.push_back( h[i] ); + } + set_color( Replxx::Color::DEFAULT ); + } + } + return ( len ); +} + +Replxx::ReplxxImpl::paren_info_t Replxx::ReplxxImpl::matching_paren( void ) { + if (_pos >= _data.length()) { + return ( paren_info_t{ -1, false } ); + } + /* this scans for a brace matching _data[_pos] to highlight */ + unsigned char part1, part2; + int scanDirection = 0; + if ( strchr("}])", _data[_pos]) ) { + scanDirection = -1; /* backwards */ + if (_data[_pos] == '}') { + part1 = '}'; part2 = '{'; + } else if (_data[_pos] == ']') { + part1 = ']'; part2 = '['; + } else { + part1 = ')'; part2 = '('; + } + } else if ( strchr("{[(", _data[_pos]) ) { + scanDirection = 1; /* forwards */ + if (_data[_pos] == '{') { + //part1 = '{'; part2 = '}'; + part1 = '}'; part2 = '{'; + } else if (_data[_pos] == '[') { + //part1 = '['; part2 = ']'; + part1 = ']'; part2 = '['; + } else { + //part1 = '('; part2 = ')'; + part1 = ')'; part2 = '('; + } + } else { + return ( paren_info_t{ -1, false } ); + } + int highlightIdx = -1; + bool indicateError = false; + int unmatched = scanDirection; + int unmatchedOther = 0; + for (int i = _pos + scanDirection; i >= 0 && i < _data.length(); i += scanDirection) { + /* TODO: the right thing when inside a string */ + if (strchr("}])", _data[i])) { + if (_data[i] == part1) { + --unmatched; + } else { + --unmatchedOther; + } + } else if (strchr("{[(", _data[i])) { + if (_data[i] == part2) { + ++unmatched; + } else { + ++unmatchedOther; + } + } + + if (unmatched == 0) { + highlightIdx = i; + indicateError = (unmatchedOther != 0); + break; + } + } + return ( paren_info_t{ highlightIdx, indicateError } ); +} + +/** + * Refresh the user's input line: the prompt is already onscreen and is not + * redrawn here screen position + */ +void Replxx::ReplxxImpl::refresh_line( HINT_ACTION hintAction_ ) { + // check for a matching brace/bracket/paren, remember its position if found + render( hintAction_ ); + int hintLen( handle_hints( hintAction_ ) ); + // calculate the position of the end of the input line + int xEndOfInput( 0 ), yEndOfInput( 0 ); + calculate_screen_position( + _prompt._indentation, 0, _prompt.screen_columns(), + calculate_displayed_length( _data.get(), _data.length() ) + hintLen, + xEndOfInput, yEndOfInput + ); + yEndOfInput += count( _display.begin(), _display.end(), '\n' ); + + // calculate the desired position of the cursor + int xCursorPos( 0 ), yCursorPos( 0 ); + calculate_screen_position( + _prompt._indentation, 0, _prompt.screen_columns(), + calculate_displayed_length( _data.get(), _pos ), + xCursorPos, yCursorPos + ); + + // position at the end of the prompt, clear to end of previous input + _terminal.jump_cursor( + _prompt._indentation, // 0-based on Win32 + -( _prompt._cursorRowOffset - _prompt._extraLines ) + ); + _terminal.clear_screen( Terminal::CLEAR_SCREEN::TO_END ); + _prompt._previousInputLen = _data.length(); + // display the input line + _terminal.write32( _display.data(), _display.size() ); +#ifndef _WIN32 + // we have to generate our own newline on line wrap + if ( ( xEndOfInput == 0 ) && ( yEndOfInput > 0 ) ) { + _terminal.write8( "\n", 1 ); + } +#endif + // position the cursor + _terminal.jump_cursor( xCursorPos, -( yEndOfInput - yCursorPos ) ); + _prompt._cursorRowOffset = _prompt._extraLines + yCursorPos; // remember row for next pass +} + +int Replxx::ReplxxImpl::context_length() { + int prefixLength = _pos; + while ( prefixLength > 0 ) { + if ( is_word_break_character( _data[prefixLength - 1] ) ) { + break; + } + -- prefixLength; + } + return ( _pos - prefixLength ); +} + +void Replxx::ReplxxImpl::repaint( void ) { + _prompt.write(); + for ( int i( _prompt._extraLines ); i < _prompt._cursorRowOffset; ++ i ) { + _terminal.write8( "\n", 1 ); + } + refresh_line( HINT_ACTION::SKIP ); +} + +void Replxx::ReplxxImpl::clear_self_to_end_of_screen( void ) { + // position at the start of the prompt, clear to end of previous input + _terminal.jump_cursor( 0, -_prompt._cursorRowOffset ); + _terminal.clear_screen( Terminal::CLEAR_SCREEN::TO_END ); + return; +} + +namespace { +int longest_common_prefix( Replxx::ReplxxImpl::completions_t const& completions ) { + int completionsCount( completions.size() ); + if ( completionsCount < 1 ) { + return ( 0 ); + } + int longestCommonPrefix( 0 ); + UnicodeString const& sample( completions.front().text() ); + while ( true ) { + if ( longestCommonPrefix >= sample.length() ) { + return ( longestCommonPrefix ); + } + char32_t sc( sample[longestCommonPrefix] ); + for ( int i( 1 ); i < completionsCount; ++ i ) { + UnicodeString const& candidate( completions[i].text() ); + if ( longestCommonPrefix >= candidate.length() ) { + return ( longestCommonPrefix ); + } + char32_t cc( candidate[longestCommonPrefix] ); + if ( cc != sc ) { + return ( longestCommonPrefix ); + } + } + ++ longestCommonPrefix; + } +} +} + +/** + * Handle command completion, using a completionCallback() routine to provide + * possible substitutions + * This routine handles the mechanics of updating the user's input buffer with + * possible replacement of text as the user selects a proposed completion string, + * or cancels the completion attempt. + * @param pi - Prompt struct holding information about the prompt and our + * screen position + */ +char32_t Replxx::ReplxxImpl::do_complete_line( bool showCompletions_ ) { + char32_t c = 0; + + // completionCallback() expects a parsable entity, so find the previous break + // character and + // extract a copy to parse. we also handle the case where tab is hit while + // not at end-of-line. + + _utf8Buffer.assign( _data, _pos ); + // get a list of completions + _completionSelection = -1; + _completionContextLength = context_length(); + _completions = call_completer( _utf8Buffer.get(), _completionContextLength ); + + // if no completions, we are done + if ( _completions.empty() ) { + beep(); + return 0; + } + + // at least one completion + int longestCommonPrefix = 0; + int completionsCount( _completions.size() ); + int selectedCompletion( 0 ); + if ( _hintSelection != -1 ) { + selectedCompletion = _hintSelection; + completionsCount = 1; + } + if ( completionsCount == 1 ) { + longestCommonPrefix = static_cast<int>( _completions[selectedCompletion].text().length() ); + } else { + longestCommonPrefix = longest_common_prefix( _completions ); + } + if ( _beepOnAmbiguousCompletion && ( completionsCount != 1 ) ) { // beep if ambiguous + beep(); + } + + // if we can extend the item, extend it and return to main loop + if ( ( longestCommonPrefix > _completionContextLength ) || ( completionsCount == 1 ) ) { + _pos -= _completionContextLength; + _data.erase( _pos, _completionContextLength ); + _data.insert( _pos, _completions[selectedCompletion].text(), 0, longestCommonPrefix ); + _pos = _pos + longestCommonPrefix; + _completionContextLength = longestCommonPrefix; + refresh_line(); + return 0; + } + + if ( ! showCompletions_ ) { + return ( 0 ); + } + + if ( _doubleTabCompletion ) { + // we can't complete any further, wait for second tab + do { + c = read_char(); + } while ( c == static_cast<char32_t>( -1 ) ); + + // if any character other than tab, pass it to the main loop + if ( c != Replxx::KEY::TAB ) { + return c; + } + } + + // we got a second tab, maybe show list of possible completions + bool showCompletions = true; + bool onNewLine = false; + if ( static_cast<int>( _completions.size() ) > _completionCountCutoff ) { + int savePos = _pos; // move cursor to EOL to avoid overwriting the command line + _pos = _data.length(); + refresh_line(); + _pos = savePos; + printf( "\nDisplay all %u possibilities? (y or n)", static_cast<unsigned int>( _completions.size() ) ); + fflush(stdout); + onNewLine = true; + while (c != 'y' && c != 'Y' && c != 'n' && c != 'N' && c != Replxx::KEY::control('C')) { + do { + c = read_char(); + } while (c == static_cast<char32_t>(-1)); + } + switch (c) { + case 'n': + case 'N': + showCompletions = false; + break; + case Replxx::KEY::control('C'): + showCompletions = false; + // Display the ^C we got + _terminal.write8( "^C", 2 ); + c = 0; + break; + } + } + + // if showing the list, do it the way readline does it + bool stopList( false ); + if ( showCompletions ) { + int longestCompletion( 0 ); + for ( size_t j( 0 ); j < _completions.size(); ++ j ) { + int itemLength( static_cast<int>( _completions[j].text().length() ) ); + if ( itemLength > longestCompletion ) { + longestCompletion = itemLength; + } + } + longestCompletion += 2; + int columnCount = _prompt.screen_columns() / longestCompletion; + if ( columnCount < 1 ) { + columnCount = 1; + } + if ( ! onNewLine ) { // skip this if we showed "Display all %d possibilities?" + int savePos = _pos; // move cursor to EOL to avoid overwriting the command line + _pos = _data.length(); + refresh_line( HINT_ACTION::TRIM ); + _pos = savePos; + } else { + _terminal.clear_screen( Terminal::CLEAR_SCREEN::TO_END ); + } + size_t pauseRow = _terminal.get_screen_rows() - 1; + size_t rowCount = (_completions.size() + columnCount - 1) / columnCount; + for (size_t row = 0; row < rowCount; ++row) { + if (row == pauseRow) { + printf("\n--More--"); + fflush(stdout); + c = 0; + bool doBeep = false; + while (c != ' ' && c != Replxx::KEY::ENTER && c != 'y' && c != 'Y' && + c != 'n' && c != 'N' && c != 'q' && c != 'Q' && + c != Replxx::KEY::control('C')) { + if (doBeep) { + beep(); + } + doBeep = true; + do { + c = read_char(); + } while (c == static_cast<char32_t>(-1)); + } + switch (c) { + case ' ': + case 'y': + case 'Y': + printf("\r \r"); + pauseRow += _terminal.get_screen_rows() - 1; + break; + case Replxx::KEY::ENTER: + printf("\r \r"); + ++pauseRow; + break; + case 'n': + case 'N': + case 'q': + case 'Q': + printf("\r \r"); + stopList = true; + break; + case Replxx::KEY::control('C'): + // Display the ^C we got + _terminal.write8( "^C", 2 ); + stopList = true; + break; + } + } else { + printf("\n"); + } + if (stopList) { + break; + } + static UnicodeString const res( ansi_color( Replxx::Color::DEFAULT ) ); + for (int column = 0; column < columnCount; ++column) { + size_t index = (column * rowCount) + row; + if ( index < _completions.size() ) { + Completion const& c( _completions[index] ); + int itemLength = static_cast<int>(c.text().length()); + fflush(stdout); + + if ( longestCommonPrefix > 0 ) { + static UnicodeString const col( ansi_color( Replxx::Color::BRIGHTMAGENTA ) ); + if (!_noColor) { + _terminal.write32(col.get(), col.length()); + } + _terminal.write32(&_data[_pos - _completionContextLength], longestCommonPrefix); + if (!_noColor) { + _terminal.write32(res.get(), res.length()); + } + } + + if ( !_noColor && ( c.color() != Replxx::Color::DEFAULT ) ) { + UnicodeString ac( ansi_color( c.color() ) ); + _terminal.write32( ac.get(), ac.length() ); + } + _terminal.write32( c.text().get() + longestCommonPrefix, itemLength - longestCommonPrefix ); + if ( !_noColor && ( c.color() != Replxx::Color::DEFAULT ) ) { + _terminal.write32( res.get(), res.length() ); + } + + if ( ((column + 1) * rowCount) + row < _completions.size() ) { + for ( int k( itemLength ); k < longestCompletion; ++k ) { + printf( " " ); + } + } + } + } + } + fflush(stdout); + } + + // display the prompt on a new line, then redisplay the input buffer + if (!stopList || c == Replxx::KEY::control('C')) { + _terminal.write8( "\n", 1 ); + } + _prompt.write(); +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if (_prompt._indentation == 0 && _prompt._extraLines > 0) { + _terminal.write8( "\n", 1 ); + } +#endif + _prompt._cursorRowOffset = _prompt._extraLines; + refresh_line(); + return 0; +} + +int Replxx::ReplxxImpl::get_input_line( void ) { + // The latest history entry is always our current buffer + if ( _data.length() > 0 ) { + _history.add( _data ); + } else { + _history.add( UnicodeString() ); + } + _history.reset_pos(); + + // display the prompt + _prompt.write(); + +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if ( ( _prompt._indentation == 0 ) && ( _prompt._extraLines > 0 ) ) { + _terminal.write8( "\n", 1 ); + } +#endif + + // the cursor starts out at the end of the prompt + _prompt._cursorRowOffset = _prompt._extraLines; + + // kill and yank start in "other" mode + _killRing.lastAction = KillRing::actionOther; + + // if there is already text in the buffer, display it first + if (_data.length() > 0) { + refresh_line(); + } + + // loop collecting characters, respond to line editing characters + Replxx::ACTION_RESULT next( Replxx::ACTION_RESULT::CONTINUE ); + while ( next == Replxx::ACTION_RESULT::CONTINUE ) { + int c( read_char( HINT_ACTION::REPAINT ) ); // get a new keystroke +#ifndef _WIN32 + if (c == 0 && gotResize) { + // caught a window resize event + // now redraw the prompt and line + gotResize = false; + _prompt.update_screen_columns(); + // redraw the original prompt with current input + dynamicRefresh( _prompt, _data.get(), _data.length(), _pos ); + continue; + } +#endif + + if (c == 0) { + return _data.length(); + } + + if (c == -1) { + refresh_line(); + continue; + } + + if (c == -2) { + _prompt.write(); + refresh_line(); + continue; + } + + key_press_handlers_t::iterator it( _keyPressHandlers.find( c ) ); + if ( it != _keyPressHandlers.end() ) { + next = it->second( c ); + if ( _modifiedState ) { + refresh_line(); + } + } else { + next = action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::insert_character, c ); + } + } + return ( next == Replxx::ACTION_RESULT::RETURN ? _data.length() : -1 ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::action( action_trait_t actionTrait_, key_press_handler_raw_t const& handler_, char32_t code_ ) { + Replxx::ACTION_RESULT res( ( this->*handler_ )( code_ ) ); + if ( actionTrait_ & RESET_KILL_ACTION ) { + _killRing.lastAction = KillRing::actionOther; + } + if ( actionTrait_ & SET_KILL_ACTION ) { + _killRing.lastAction = KillRing::actionKill; + } + if ( ! ( actionTrait_ & DONT_RESET_PREFIX ) ) { + _prefix = _pos; + } + if ( ! ( actionTrait_ & DONT_RESET_COMPLETIONS ) ) { + _completions.clear(); + _completionSelection = -1; + _completionContextLength = 0; + } + if ( actionTrait_ & WANT_REFRESH ) { + _modifiedState = true; + } + return ( res ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::insert_character( char32_t c ) { + _history.reset_recall_most_recent(); + /* + * beep on unknown Ctrl and/or Meta keys + * don't insert control characters + */ + if ( ( c >= static_cast<int>( Replxx::KEY::BASE ) ) || is_control_code( c ) ) { + beep(); + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + if ( ! _overwrite || ( _pos >= _data.length() ) ) { + _data.insert( _pos, c ); + } else { + _data[_pos] = c; + } + ++ _pos; + int inputLen = calculate_displayed_length( _data.get(), _data.length() ); + if ( + ( _pos == _data.length() ) + && ( _noColor || ! ( !! _highlighterCallback || !! _hintCallback ) ) + && ( _prompt._indentation + inputLen < _prompt.screen_columns() ) + ) { + /* Avoid a full assign of the line in the + * trivial case. */ + if (inputLen > _prompt._previousInputLen) { + _prompt._previousInputLen = inputLen; + } + render( c ); + _displayInputLength = _display.size(); + _terminal.write32(reinterpret_cast<char32_t*>(&c), 1); + } else { + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-A, HOME: move cursor to start of line +Replxx::ACTION_RESULT Replxx::ReplxxImpl::go_to_begining_of_line( char32_t ) { + _pos = 0; + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::go_to_end_of_line( char32_t ) { + _pos = _data.length(); + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-B, move cursor left by one character +Replxx::ACTION_RESULT Replxx::ReplxxImpl::move_one_char_left( char32_t ) { + if (_pos > 0) { + --_pos; + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-F, move cursor right by one character +Replxx::ACTION_RESULT Replxx::ReplxxImpl::move_one_char_right( char32_t ) { + if ( _pos < _data.length() ) { + ++_pos; + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-B, move cursor left by one word +Replxx::ACTION_RESULT Replxx::ReplxxImpl::move_one_word_left( char32_t ) { + if (_pos > 0) { + while (_pos > 0 && is_word_break_character( _data[_pos - 1] ) ) { + --_pos; + } + while (_pos > 0 && !is_word_break_character( _data[_pos - 1] ) ) { + --_pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-F, move cursor right by one word +Replxx::ACTION_RESULT Replxx::ReplxxImpl::move_one_word_right( char32_t ) { + if ( _pos < _data.length() ) { + while ( _pos < _data.length() && is_word_break_character( _data[_pos] ) ) { + ++_pos; + } + while ( _pos < _data.length() && !is_word_break_character( _data[_pos] ) ) { + ++_pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-Backspace, kill word to left of cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::kill_word_to_left( char32_t ) { + if ( _pos > 0 ) { + _history.reset_recall_most_recent(); + int startingPos = _pos; + while ( _pos > 0 && is_word_break_character( _data[_pos - 1] ) ) { + -- _pos; + } + while ( _pos > 0 && !is_word_break_character( _data[_pos - 1] ) ) { + -- _pos; + } + _killRing.kill( _data.get() + _pos, startingPos - _pos, false); + _data.erase( _pos, startingPos - _pos ); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-D, kill word to right of cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::kill_word_to_right( char32_t ) { + if ( _pos < _data.length() ) { + _history.reset_recall_most_recent(); + int endingPos = _pos; + while ( endingPos < _data.length() && is_word_break_character( _data[endingPos] ) ) { + ++ endingPos; + } + while ( endingPos < _data.length() && !is_word_break_character( _data[endingPos] ) ) { + ++ endingPos; + } + _killRing.kill( _data.get() + _pos, endingPos - _pos, true ); + _data.erase( _pos, endingPos - _pos ); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-W, kill to whitespace (not word) to left of cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::kill_to_whitespace_to_left( char32_t ) { + if ( _pos > 0 ) { + _history.reset_recall_most_recent(); + int startingPos = _pos; + while ( _pos > 0 && _data[_pos - 1] == ' ' ) { + --_pos; + } + while ( _pos > 0 && _data[_pos - 1] != ' ' ) { + -- _pos; + } + _killRing.kill( _data.get() + _pos, startingPos - _pos, false ); + _data.erase( _pos, startingPos - _pos ); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-K, kill from cursor to end of line +Replxx::ACTION_RESULT Replxx::ReplxxImpl::kill_to_end_of_line( char32_t ) { + _killRing.kill( _data.get() + _pos, _data.length() - _pos, true ); + _data.erase( _pos, _data.length() - _pos ); + _history.reset_recall_most_recent(); + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-U, kill all characters to the left of the cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::kill_to_begining_of_line( char32_t ) { + if (_pos > 0) { + _history.reset_recall_most_recent(); + _killRing.kill( _data.get(), _pos, false ); + _data.erase( 0, _pos ); + _pos = 0; + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-Y, yank killed text +Replxx::ACTION_RESULT Replxx::ReplxxImpl::yank( char32_t ) { + _history.reset_recall_most_recent(); + UnicodeString* restoredText( _killRing.yank() ); + if ( restoredText ) { + _data.insert( _pos, *restoredText, 0, restoredText->length() ); + _pos += restoredText->length(); + refresh_line(); + _killRing.lastAction = KillRing::actionYank; + _killRing.lastYankSize = restoredText->length(); + } else { + beep(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-Y, "yank-pop", rotate popped text +Replxx::ACTION_RESULT Replxx::ReplxxImpl::yank_cycle( char32_t ) { + if ( _killRing.lastAction != KillRing::actionYank ) { + beep(); + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + _history.reset_recall_most_recent(); + UnicodeString* restoredText = _killRing.yankPop(); + if ( !restoredText ) { + beep(); + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + _pos -= _killRing.lastYankSize; + _data.erase( _pos, _killRing.lastYankSize ); + _data.insert( _pos, *restoredText, 0, restoredText->length() ); + _pos += restoredText->length(); + _killRing.lastYankSize = restoredText->length(); + refresh_line(); + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-C, give word initial Cap +Replxx::ACTION_RESULT Replxx::ReplxxImpl::capitalize_word( char32_t ) { + _history.reset_recall_most_recent(); + if (_pos < _data.length()) { + while ( _pos < _data.length() && is_word_break_character( _data[_pos] ) ) { + ++_pos; + } + if (_pos < _data.length() && !is_word_break_character( _data[_pos] ) ) { + if ( _data[_pos] >= 'a' && _data[_pos] <= 'z' ) { + _data[_pos] += 'A' - 'a'; + } + ++_pos; + } + while (_pos < _data.length() && !is_word_break_character( _data[_pos] ) ) { + if ( _data[_pos] >= 'A' && _data[_pos] <= 'Z' ) { + _data[_pos] += 'a' - 'A'; + } + ++_pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-L, lowercase word +Replxx::ACTION_RESULT Replxx::ReplxxImpl::lowercase_word( char32_t ) { + if (_pos < _data.length()) { + _history.reset_recall_most_recent(); + while ( _pos < _data.length() && is_word_break_character( _data[_pos] ) ) { + ++ _pos; + } + while (_pos < _data.length() && !is_word_break_character( _data[_pos] ) ) { + if ( _data[_pos] >= 'A' && _data[_pos] <= 'Z' ) { + _data[_pos] += 'a' - 'A'; + } + ++ _pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-U, uppercase word +Replxx::ACTION_RESULT Replxx::ReplxxImpl::uppercase_word( char32_t ) { + if (_pos < _data.length()) { + _history.reset_recall_most_recent(); + while ( _pos < _data.length() && is_word_break_character( _data[_pos] ) ) { + ++ _pos; + } + while ( _pos < _data.length() && !is_word_break_character( _data[_pos] ) ) { + if ( _data[_pos] >= 'a' && _data[_pos] <= 'z') { + _data[_pos] += 'A' - 'a'; + } + ++ _pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-T, transpose characters +Replxx::ACTION_RESULT Replxx::ReplxxImpl::transpose_characters( char32_t ) { + if ( _pos > 0 && _data.length() > 1 ) { + _history.reset_recall_most_recent(); + size_t leftCharPos = ( _pos == _data.length() ) ? _pos - 2 : _pos - 1; + char32_t aux = _data[leftCharPos]; + _data[leftCharPos] = _data[leftCharPos + 1]; + _data[leftCharPos + 1] = aux; + if ( _pos != _data.length() ) { + ++_pos; + } + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-C, abort this line +Replxx::ACTION_RESULT Replxx::ReplxxImpl::abort_line( char32_t ) { + _history.reset_recall_most_recent(); + errno = EAGAIN; + _history.drop_last(); + // we need one last refresh with the cursor at the end of the line + // so we don't display the next prompt over the previous input line + _pos = _data.length(); // pass _data.length() as _pos for EOL + refresh_line( HINT_ACTION::TRIM ); + _terminal.write8( "^C\r\n", 4 ); + return ( Replxx::ACTION_RESULT::BAIL ); +} + +// DEL, delete the character under the cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::delete_character( char32_t ) { + if ( ( _data.length() > 0 ) && ( _pos < _data.length() ) ) { + _history.reset_recall_most_recent(); + _data.erase( _pos ); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-D, delete the character under the cursor +// on an empty line, exit the shell +Replxx::ACTION_RESULT Replxx::ReplxxImpl::send_eof( char32_t key_ ) { + if ( _data.length() == 0 ) { + _history.drop_last(); + return ( Replxx::ACTION_RESULT::BAIL ); + } + return ( delete_character( key_ ) ); +} + +// backspace/ctrl-H, delete char to left of cursor +Replxx::ACTION_RESULT Replxx::ReplxxImpl::backspace_character( char32_t ) { + if ( _pos > 0 ) { + _history.reset_recall_most_recent(); + -- _pos; + _data.erase( _pos ); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-J/linefeed/newline, accept line +// ctrl-M/return/enter +Replxx::ACTION_RESULT Replxx::ReplxxImpl::commit_line( char32_t ) { + // we need one last refresh with the cursor at the end of the line + // so we don't display the next prompt over the previous input line + _pos = _data.length(); // pass _data.length() as _pos for EOL + refresh_line( HINT_ACTION::TRIM ); + _history.commit_index(); + _history.drop_last(); + return ( Replxx::ACTION_RESULT::RETURN ); +} + +// ctrl-N, recall next line in history +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_next( char32_t ) { + return ( history_move( false ) ); +} + +// ctrl-P, recall previous line in history +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_previous( char32_t ) { + return ( history_move( true ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_move( bool previous_ ) { + // if not already recalling, add the current line to the history list so + // we don't + // have to special case it + if ( _history.is_last() ) { + _history.update_last( _data ); + } + if ( _history.is_empty() ) { + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + if ( ! _history.move( previous_ ) ) { + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + _data.assign( _history.current() ); + _pos = _data.length(); + refresh_line(); + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// meta-<, beginning of history +// Page Up, beginning of history +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_first( char32_t ) { + return ( history_jump( true ) ); +} + +// meta->, end of history +// Page Down, end of history +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_last( char32_t ) { + return ( history_jump( false ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::history_jump( bool back_ ) { + // if not already recalling, add the current line to the history list so + // we don't + // have to special case it + if ( _history.is_last() ) { + _history.update_last( _data ); + } + if ( ! _history.is_empty() ) { + _history.jump( back_ ); + _data.assign( _history.current() ); + _pos = _data.length(); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::hint_next( char32_t ) { + return ( hint_move( false ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::hint_previous( char32_t ) { + return ( hint_move( true ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::hint_move( bool previous_ ) { + if ( ! _noColor ) { + _killRing.lastAction = KillRing::actionOther; + if ( previous_ ) { + -- _hintSelection; + } else { + ++ _hintSelection; + } + refresh_line( HINT_ACTION::REPAINT ); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::toggle_overwrite_mode( char32_t ) { + _overwrite = ! _overwrite; + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +#ifndef _WIN32 +Replxx::ACTION_RESULT Replxx::ReplxxImpl::verbatim_insert( char32_t ) { + static int const MAX_ESC_SEQ( 32 ); + char32_t buf[MAX_ESC_SEQ]; + int len( _terminal.read_verbatim( buf, MAX_ESC_SEQ ) ); + _data.insert( _pos, UnicodeString( buf, len ), 0, len ); + _pos += len; + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-Z, job control +Replxx::ACTION_RESULT Replxx::ReplxxImpl::suspend( char32_t ) { + _terminal.disable_raw_mode(); // Returning to Linux (whatever) shell, leave raw mode + raise(SIGSTOP); // Break out in mid-line + _terminal.enable_raw_mode(); // Back from Linux shell, re-enter raw mode + // Redraw prompt + _prompt.write(); + return ( Replxx::ACTION_RESULT::CONTINUE ); +} +#endif + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::complete_line( char32_t c ) { + if ( !! _completionCallback && ( _completeOnEmpty || ( _pos > 0 ) ) ) { + _killRing.lastAction = KillRing::actionOther; + _history.reset_recall_most_recent(); + + // complete_line does the actual completion and replacement + c = do_complete_line( c != 0 ); + + if ( static_cast<int>( c ) < 0 ) { + return ( Replxx::ACTION_RESULT::BAIL ); + } + if ( c != 0 ) { + emulate_key_press( c ); + } + } else { + insert_character( c ); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::complete( bool previous_ ) { + if ( _completions.empty() ) { + bool first( _completions.empty() ); + complete_line( first ? '\t' : 0 ); + if ( first ) { + return ( Replxx::ACTION_RESULT::CONTINUE ); + } + } + int newSelection( _completionSelection + ( previous_ ? -1 : 1 ) ); + if ( newSelection >= static_cast<int>( _completions.size() ) ) { + newSelection = -1; + } else if ( newSelection == -2 ) { + newSelection = static_cast<int>( _completions.size() ) - 1; + } + if ( _completionSelection != -1 ) { + int oldCompletionLength( _completions[_completionSelection].text().length() - _completionContextLength ); + _pos -= oldCompletionLength; + _data.erase( _pos, oldCompletionLength ); + } + if ( newSelection != -1 ) { + int newCompletionLength( _completions[newSelection].text().length() - _completionContextLength ); + _data.insert( _pos, _completions[newSelection].text(), _completionContextLength, newCompletionLength ); + _pos += newCompletionLength; + } + _completionSelection = newSelection; + refresh_line(); // Refresh the line + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::complete_next( char32_t ) { + return ( complete( false ) ); +} + +Replxx::ACTION_RESULT Replxx::ReplxxImpl::complete_previous( char32_t ) { + return ( complete( true ) ); +} + +// Alt-P, reverse history search for prefix +// Alt-P, reverse history search for prefix +// Alt-N, forward history search for prefix +// Alt-N, forward history search for prefix +Replxx::ACTION_RESULT Replxx::ReplxxImpl::common_prefix_search( char32_t startChar ) { + int prefixSize( calculate_displayed_length( _data.get(), _prefix ) ); + if ( + _history.common_prefix_search( + _data, prefixSize, ( startChar == ( Replxx::KEY::meta( 'p' ) ) ) || ( startChar == ( Replxx::KEY::meta( 'P' ) ) ) + ) + ) { + _data.assign( _history.current() ); + _pos = _data.length(); + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-R, reverse history search +// ctrl-S, forward history search +/** + * Incremental history search -- take over the prompt and keyboard as the user + * types a search string, deletes characters from it, changes _direction, + * and either accepts the found line (for execution orediting) or cancels. + * @param startChar - the character that began the search, used to set the initial + * _direction + */ +Replxx::ACTION_RESULT Replxx::ReplxxImpl::incremental_history_search( char32_t startChar ) { + // if not already recalling, add the current line to the history list so we + // don't have to special case it + if ( _history.is_last() ) { + _history.update_last( _data ); + } + int historyLinePosition( _pos ); + clear_self_to_end_of_screen(); + + DynamicPrompt dp( _terminal, (startChar == Replxx::KEY::control('R')) ? -1 : 1 ); + + dp._previousLen = _prompt._previousLen; + dp._previousInputLen = _prompt._previousInputLen; + // draw user's text with our prompt + dynamicRefresh(dp, _data.get(), _data.length(), historyLinePosition); + + // loop until we get an exit character + char32_t c( 0 ); + bool keepLooping = true; + bool useSearchedLine = true; + bool searchAgain = false; + UnicodeString activeHistoryLine; + while ( keepLooping ) { + c = read_char(); + + switch (c) { + // these characters keep the selected text but do not execute it + case Replxx::KEY::control('A'): // ctrl-A, move cursor to start of line + case Replxx::KEY::HOME: + case Replxx::KEY::control('B'): // ctrl-B, move cursor left by one character + case Replxx::KEY::LEFT: + case Replxx::KEY::meta( 'b' ): // meta-B, move cursor left by one word + case Replxx::KEY::meta( 'B' ): + case Replxx::KEY::control( Replxx::KEY::LEFT ): + case Replxx::KEY::meta( Replxx::KEY::LEFT ): // Emacs allows Meta, bash & readline don't + case Replxx::KEY::control('D'): + case Replxx::KEY::meta( 'd' ): // meta-D, kill word to right of cursor + case Replxx::KEY::meta( 'D' ): + case Replxx::KEY::control('E'): // ctrl-E, move cursor to end of line + case Replxx::KEY::END: + case Replxx::KEY::control('F'): // ctrl-F, move cursor right by one character + case Replxx::KEY::RIGHT: + case Replxx::KEY::meta( 'f' ): // meta-F, move cursor right by one word + case Replxx::KEY::meta( 'F' ): + case Replxx::KEY::control( Replxx::KEY::RIGHT ): + case Replxx::KEY::meta( Replxx::KEY::RIGHT ): // Emacs allows Meta, bash & readline don't + case Replxx::KEY::meta( Replxx::KEY::BACKSPACE ): + case Replxx::KEY::control('J'): + case Replxx::KEY::control('K'): // ctrl-K, kill from cursor to end of line + case Replxx::KEY::ENTER: + case Replxx::KEY::control('N'): // ctrl-N, recall next line in history + case Replxx::KEY::control('P'): // ctrl-P, recall previous line in history + case Replxx::KEY::DOWN: + case Replxx::KEY::UP: + case Replxx::KEY::control('T'): // ctrl-T, transpose characters + case Replxx::KEY::control('U'): // ctrl-U, kill all characters to the left of the cursor + case Replxx::KEY::control('W'): + case Replxx::KEY::meta( 'y' ): // meta-Y, "yank-pop", rotate popped text + case Replxx::KEY::meta( 'Y' ): + case 127: + case Replxx::KEY::DELETE: + case Replxx::KEY::meta( '<' ): // start of history + case Replxx::KEY::PAGE_UP: + case Replxx::KEY::meta( '>' ): // end of history + case Replxx::KEY::PAGE_DOWN: + keepLooping = false; + break; + + // these characters revert the input line to its previous state + case Replxx::KEY::control('C'): // ctrl-C, abort this line + case Replxx::KEY::control('G'): + case Replxx::KEY::control('L'): // ctrl-L, clear screen and redisplay line + keepLooping = false; + useSearchedLine = false; + if (c != Replxx::KEY::control('L')) { + c = -1; // ctrl-C and ctrl-G just abort the search and do nothing else + } + break; + + // these characters stay in search mode and assign the display + case Replxx::KEY::control('S'): + case Replxx::KEY::control('R'): + if ( dp._searchText.length() == 0 ) { // if no current search text, recall previous text + if ( previousSearchText.length() > 0 ) { + dp._searchText = previousSearchText; + } + } + if ((dp._direction == 1 && c == Replxx::KEY::control('R')) || + (dp._direction == -1 && c == Replxx::KEY::control('S'))) { + dp._direction = 0 - dp._direction; // reverse _direction + dp.updateSearchPrompt(); // change the prompt + } else { + searchAgain = true; // same _direction, search again + } + break; + +// job control is its own thing +#ifndef _WIN32 + case Replxx::KEY::control('Z'): { // ctrl-Z, job control + _terminal.disable_raw_mode(); // Returning to Linux (whatever) shell, leave raw mode + raise(SIGSTOP); // Break out in mid-line + _terminal.enable_raw_mode(); // Back from Linux shell, re-enter raw mode + dynamicRefresh(dp, activeHistoryLine.get(), activeHistoryLine.length(), historyLinePosition); + continue; + } break; +#endif + + // these characters assign the search string, and hence the selected input + // line + case Replxx::KEY::BACKSPACE: // backspace/ctrl-H, delete char to left of cursor + if ( dp._searchText.length() > 0 ) { + dp._searchText.erase( dp._searchText.length() - 1 ); + dp.updateSearchPrompt(); + _history.reset_pos( dp._direction == -1 ? _history.size() - 1 : 0 ); + } else { + beep(); + } + break; + + case Replxx::KEY::control('Y'): // ctrl-Y, yank killed text + break; + + default: { + if ( ! is_control_code( c ) && ( c < static_cast<int>( Replxx::KEY::BASE ) ) ) { // not an action character + dp._searchText.insert( dp._searchText.length(), c ); + dp.updateSearchPrompt(); + } else { + beep(); + } + } + } // switch + + // if we are staying in search mode, search now + if ( ! keepLooping ) { + break; + } + activeHistoryLine.assign( _history.current() ); + if ( dp._searchText.length() > 0 ) { + bool found = false; + int historySearchIndex = _history.current_pos(); + int lineSearchPos = historyLinePosition; + if ( searchAgain ) { + lineSearchPos += dp._direction; + } + searchAgain = false; + while ( true ) { + while ( ( ( lineSearchPos + dp._searchText.length() ) <= activeHistoryLine.length() ) && ( lineSearchPos >= 0 ) ) { + if ( std::equal( dp._searchText.begin(), dp._searchText.end(), activeHistoryLine.begin() + lineSearchPos ) ) { + found = true; + break; + } + lineSearchPos += dp._direction; + } + if ( found ) { + _history.reset_pos( historySearchIndex ); + historyLinePosition = lineSearchPos; + break; + } else if ( ( dp._direction > 0 ) ? ( historySearchIndex < _history.size() ) : ( historySearchIndex > 0 ) ) { + historySearchIndex += dp._direction; + activeHistoryLine.assign( _history[historySearchIndex] ); + lineSearchPos = ( dp._direction > 0 ) ? 0 : ( activeHistoryLine.length() - dp._searchText.length() ); + } else { + beep(); + break; + } + } // while + } + activeHistoryLine.assign( _history.current() ); + dynamicRefresh(dp, activeHistoryLine.get(), activeHistoryLine.length(), historyLinePosition); // draw user's text with our prompt + } // while + + // leaving history search, restore previous prompt, maybe make searched line + // current + Prompt pb( _terminal ); + pb._characterCount = _prompt._indentation; + pb._byteCount = _prompt._byteCount; + UnicodeString tempUnicode( &_prompt._text[_prompt._lastLinePosition], pb._byteCount - _prompt._lastLinePosition ); + pb._text = tempUnicode; + pb._extraLines = 0; + pb._indentation = _prompt._indentation; + pb._lastLinePosition = 0; + pb._previousInputLen = activeHistoryLine.length(); + pb._cursorRowOffset = dp._cursorRowOffset; + pb.update_screen_columns(); + pb._previousLen = dp._characterCount; + if ( useSearchedLine && ( activeHistoryLine.length() > 0 ) ) { + _history.set_recall_most_recent(); + _data.assign( activeHistoryLine ); + _pos = historyLinePosition; + } + dynamicRefresh(pb, _data.get(), _data.length(), _pos); // redraw the original prompt with current input + _prompt._previousInputLen = _data.length(); + _prompt._cursorRowOffset = _prompt._extraLines + pb._cursorRowOffset; + previousSearchText = dp._searchText; // save search text for possible reuse on ctrl-R ctrl-R + emulate_key_press( c ); // pass a character or -1 back to main loop + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +// ctrl-L, clear screen and redisplay line +Replxx::ACTION_RESULT Replxx::ReplxxImpl::clear_screen( char32_t c ) { + _terminal.clear_screen( Terminal::CLEAR_SCREEN::WHOLE ); + if ( c ) { + _prompt.write(); +#ifndef _WIN32 + // we have to generate our own newline on line wrap on Linux + if (_prompt._indentation == 0 && _prompt._extraLines > 0) { + _terminal.write8( "\n", 1 ); + } +#endif + _prompt._cursorRowOffset = _prompt._extraLines; + refresh_line(); + } + return ( Replxx::ACTION_RESULT::CONTINUE ); +} + +bool Replxx::ReplxxImpl::is_word_break_character( char32_t char_ ) const { + bool wbc( false ); + if ( char_ < 128 ) { + wbc = strchr( _breakChars, static_cast<char>( char_ ) ) != nullptr; + } + return ( wbc ); +} + +void Replxx::ReplxxImpl::history_add( std::string const& line ) { + _history.add( UnicodeString( line ) ); +} + +int Replxx::ReplxxImpl::history_save( std::string const& filename ) { + return ( _history.save( filename ) ); +} + +int Replxx::ReplxxImpl::history_load( std::string const& filename ) { + return ( _history.load( filename ) ); +} + +int Replxx::ReplxxImpl::history_size( void ) const { + return ( _history.size() ); +} + +std::string Replxx::ReplxxImpl::history_line( int index ) { + _utf8Buffer.assign( _history[index] ); + return ( _utf8Buffer.get() ); +} + +void Replxx::ReplxxImpl::set_completion_callback( Replxx::completion_callback_t const& fn ) { + _completionCallback = fn; +} + +void Replxx::ReplxxImpl::set_highlighter_callback( Replxx::highlighter_callback_t const& fn ) { + _highlighterCallback = fn; +} + +void Replxx::ReplxxImpl::set_hint_callback( Replxx::hint_callback_t const& fn ) { + _hintCallback = fn; +} + +void Replxx::ReplxxImpl::set_max_history_size( int len ) { + _history.set_max_size( len ); +} + +void Replxx::ReplxxImpl::set_completion_count_cutoff( int count ) { + _completionCountCutoff = count; +} + +void Replxx::ReplxxImpl::set_max_hint_rows( int count ) { + _maxHintRows = count; +} + +void Replxx::ReplxxImpl::set_hint_delay( int hintDelay_ ) { + _hintDelay = hintDelay_; +} + +void Replxx::ReplxxImpl::set_word_break_characters( char const* wordBreakers ) { + _breakChars = wordBreakers; +} + +void Replxx::ReplxxImpl::set_double_tab_completion( bool val ) { + _doubleTabCompletion = val; +} + +void Replxx::ReplxxImpl::set_complete_on_empty( bool val ) { + _completeOnEmpty = val; +} + +void Replxx::ReplxxImpl::set_beep_on_ambiguous_completion( bool val ) { + _beepOnAmbiguousCompletion = val; +} + +void Replxx::ReplxxImpl::set_no_color( bool val ) { + _noColor = val; +} + +/** + * Display the dynamic incremental search prompt and the current user input + * line. + * @param pi Prompt struct holding information about the prompt and our + * screen position + * @param buf32 input buffer to be displayed + * @param len count of characters in the buffer + * @param pos current cursor position within the buffer (0 <= pos <= len) + */ +void Replxx::ReplxxImpl::dynamicRefresh(Prompt& pi, char32_t* buf32, int len, int pos) { + clear_self_to_end_of_screen(); + // calculate the position of the end of the prompt + int xEndOfPrompt, yEndOfPrompt; + calculate_screen_position( + 0, 0, pi.screen_columns(), pi._characterCount, + xEndOfPrompt, yEndOfPrompt + ); + pi._indentation = xEndOfPrompt; + + // calculate the position of the end of the input line + int xEndOfInput, yEndOfInput; + calculate_screen_position( + xEndOfPrompt, yEndOfPrompt, pi.screen_columns(), + calculate_displayed_length(buf32, len), xEndOfInput, + yEndOfInput + ); + + // calculate the desired position of the cursor + int xCursorPos, yCursorPos; + calculate_screen_position( + xEndOfPrompt, yEndOfPrompt, pi.screen_columns(), + calculate_displayed_length(buf32, pos), xCursorPos, + yCursorPos + ); + + pi._previousLen = pi._indentation; + pi._previousInputLen = len; + + // display the prompt + pi.write(); + + // display the input line + _terminal.write32( buf32, len ); + +#ifndef _WIN32 + // we have to generate our own newline on line wrap + if (xEndOfInput == 0 && yEndOfInput > 0) { + _terminal.write8( "\n", 1 ); + } +#endif + // position the cursor + _terminal.jump_cursor( + xCursorPos, // 0-based on Win32 + -( yEndOfInput - yCursorPos ) + ); + pi._cursorRowOffset = pi._extraLines + yCursorPos; // remember row for next pass +} + +} + |