/
replxx_impl.cxx
2115 lines (1944 loc) · 73.6 KB
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replxx_impl.cxx
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#include <algorithm>
#include <memory>
#include <cerrno>
#include <iostream>
#include <chrono>
#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;
}
int long long RAPID_REFRESH_MS = 1;
int long long RAPID_REFRESH_US = RAPID_REFRESH_MS * 1000;
inline int long long now_us( void ) {
return ( std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count() );
}
}
Replxx::ReplxxImpl::ReplxxImpl( FILE*, FILE*, FILE* )
: _utf8Buffer()
, _data()
, _charWidths()
, _display()
, _displayInputLength( 0 )
, _hint()
, _pos( 0 )
, _prefix( 0 )
, _hintSelection( -1 )
, _history()
, _killRing()
, _lastRefreshTime( now_us() )
, _refreshSkipped( false )
, _lastYankSize( 0 )
, _maxHintRows( REPLXX_MAX_HINT_ROWS )
, _hintDelay( 0 )
, _breakChars( defaultBreakChars )
, _completionCountCutoff( 100 )
, _overwrite( false )
, _doubleTabCompletion( false )
, _completeOnEmpty( true )
, _beepOnAmbiguousCompletion( false )
, _immediateCompletion( true )
, _bracketedPaste( false )
, _noColor( false )
, _keyPressHandlers()
, _terminal()
, _currentThread()
, _prompt( _terminal )
, _completionCallback( nullptr )
, _highlighterCallback( nullptr )
, _hintCallback( nullptr )
, _keyPresses()
, _messages()
, _completions()
, _completionContextLength( 0 )
, _completionSelection( -1 )
, _preloadedBuffer()
, _errorMessage()
, _previousSearchText()
, _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( '.' ), std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK_LAST_ARG, _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 ) );
bind_key( Replxx::KEY::BRACKETED_PASTE, std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::BRACKETED_PASTE, _1 ) );
}
Replxx::ReplxxImpl::~ReplxxImpl( void ) {
disable_bracketed_paste();
}
Replxx::ACTION_RESULT Replxx::ReplxxImpl::invoke( Replxx::ACTION action_, char32_t code ) {
switch ( action_ ) {
case ( Replxx::ACTION::INSERT_CHARACTER ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::insert_character, code ) );
case ( Replxx::ACTION::DELETE_CHARACTER_UNDER_CURSOR ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::delete_character, code ) );
case ( Replxx::ACTION::DELETE_CHARACTER_LEFT_OF_CURSOR ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::backspace_character, code ) );
case ( Replxx::ACTION::KILL_TO_END_OF_LINE ): return ( action( WANT_REFRESH | SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_to_end_of_line, code ) );
case ( Replxx::ACTION::KILL_TO_BEGINING_OF_LINE ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_to_begining_of_line, code ) );
case ( Replxx::ACTION::KILL_TO_END_OF_WORD ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_word_to_right, code ) );
case ( Replxx::ACTION::KILL_TO_BEGINING_OF_WORD ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_word_to_left, code ) );
case ( Replxx::ACTION::KILL_TO_WHITESPACE_ON_LEFT ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_to_whitespace_to_left, code ) );
case ( Replxx::ACTION::YANK ): return ( action( HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::yank, code ) );
case ( Replxx::ACTION::YANK_CYCLE ): return ( action( HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::yank_cycle, code ) );
case ( Replxx::ACTION::YANK_LAST_ARG ): return ( action( HISTORY_RECALL_MOST_RECENT | DONT_RESET_HIST_YANK_INDEX, &Replxx::ReplxxImpl::yank_last_arg, 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 | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::capitalize_word, code ) );
case ( Replxx::ACTION::LOWERCASE_WORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::lowercase_word, code ) );
case ( Replxx::ACTION::UPPERCASE_WORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::uppercase_word, code ) );
case ( Replxx::ACTION::TRANSPOSE_CHARACTERS ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &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( HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::complete_line, code ) );
case ( Replxx::ACTION::COMPLETE_NEXT ): return ( action( RESET_KILL_ACTION | DONT_RESET_COMPLETIONS | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::complete_next, code ) );
case ( Replxx::ACTION::COMPLETE_PREVIOUS ): return ( action( RESET_KILL_ACTION | DONT_RESET_COMPLETIONS | HISTORY_RECALL_MOST_RECENT, &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 | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::abort_line, code ) );
case ( Replxx::ACTION::SEND_EOF ): return ( action( HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::send_eof, code ) );
case ( Replxx::ACTION::BRACKETED_PASTE ): return ( action( WANT_REFRESH | RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::bracketed_paste, 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(
_refreshSkipped
? static_cast<int>( RAPID_REFRESH_MS * 2 )
: ( 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( _refreshSkipped ? HINT_ACTION::REGENERATE : HINT_ACTION::REPAINT );
hintDelay = 0;
_refreshSkipped = false;
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;
}
void Replxx::ReplxxImpl::call_modify_callback( void ) {
if ( ! _modifyCallback ) {
return;
}
_utf8Buffer.assign( _data );
std::string origLine( _utf8Buffer.get() );
int pos( _pos );
std::string line( origLine );
_modifyCallback( line, pos );
if ( ( pos != _pos ) || ( line != origLine ) ) {
_data.assign( line.c_str() );
_pos = min( pos, _data.length() );
_modifiedState = true;
}
}
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 ) );
}
_terminal.write8( "\n", 1 );
_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::enable_bracketed_paste( void ) {
if ( _bracketedPaste ) {
return;
}
_terminal.enable_bracketed_paste();
_bracketedPaste = true;
}
void Replxx::ReplxxImpl::disable_bracketed_paste( void ) {
if ( ! _bracketedPaste ) {
return;
}
_terminal.disable_bracketed_paste();
_bracketedPaste = false;
}
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( control_to_human( ch ) );
} 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() );
_modifiedState = false;
return;
}
if ( hintAction_ == HINT_ACTION::SKIP ) {
return;
}
_display.clear();
if ( _noColor ) {
for ( char32_t ch : _data ) {
render( ch );
}
_displayInputLength = _display.size();
_modifiedState = false;
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 );
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 );
if ( contextLen < len ) {
set_color( c );
for ( int i( contextLen ); i < len; ++ i ) {
_display.push_back( _hint[i] );
}
set_color( Replxx::Color::DEFAULT );
}
}
startCol -= contextLen;
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_ ) {
int long long now( now_us() );
int long long duration( now - _lastRefreshTime );
if ( duration < RAPID_REFRESH_US ) {
_lastRefreshTime = now;
_refreshSkipped = true;
return;
}
_refreshSkipped = false;
// 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.set_cursor_visible( false );
_terminal.jump_cursor(
_prompt._indentation, // 0-based on Win32
-( _prompt._cursorRowOffset - _prompt._extraLines )
);
_prompt._previousInputLen = _data.length();
// display the input line
_terminal.write32( _display.data(), _displayInputLength );
_terminal.clear_screen( Terminal::CLEAR_SCREEN::TO_END );
_terminal.write32( _display.data() + _displayInputLength, _display.size() - _displayInputLength );
#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 ) );
_terminal.set_cursor_visible( true );
_prompt._cursorRowOffset = _prompt._extraLines + yCursorPos; // remember row for next pass
_lastRefreshTime = now_us();
}
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( Prompt const* prompt_ ) {
// position at the start of the prompt, clear to end of previous input
_terminal.jump_cursor( 0, prompt_ ? -prompt_->_cursorRowOffset : -_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));