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replxx_impl.cxx
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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 "terminal.hxx"
#include "history.hxx"
#include "replxx.hxx"
using namespace std;
namespace replxx {
namespace {
namespace action_names {
char const INSERT_CHARACTER[] = "insert_character";
char const NEW_LINE[] = "new_line";
char const MOVE_CURSOR_TO_BEGINING_OF_LINE[] = "move_cursor_to_begining_of_line";
char const MOVE_CURSOR_TO_END_OF_LINE[] = "move_cursor_to_end_of_line";
char const MOVE_CURSOR_LEFT[] = "move_cursor_left";
char const MOVE_CURSOR_RIGHT[] = "move_cursor_right";
char const MOVE_CURSOR_ONE_WORD_LEFT[] = "move_cursor_one_word_left";
char const MOVE_CURSOR_ONE_WORD_RIGHT[] = "move_cursor_one_word_right";
char const MOVE_CURSOR_ONE_SUBWORD_LEFT[] = "move_cursor_one_subword_left";
char const MOVE_CURSOR_ONE_SUBWORD_RIGHT[] = "move_cursor_one_subword_right";
char const KILL_TO_WHITESPACE_ON_LEFT[] = "kill_to_whitespace_on_left";
char const KILL_TO_END_OF_WORD[] = "kill_to_end_of_word";
char const KILL_TO_END_OF_SUBWORD[] = "kill_to_end_of_subword";
char const KILL_TO_BEGINING_OF_WORD[] = "kill_to_begining_of_word";
char const KILL_TO_BEGINING_OF_SUBWORD[] = "kill_to_begining_of_subword";
char const KILL_TO_BEGINING_OF_LINE[] = "kill_to_begining_of_line";
char const KILL_TO_END_OF_LINE[] = "kill_to_end_of_line";
char const YANK[] = "yank";
char const YANK_CYCLE[] = "yank_cycle";
char const YANK_LAST_ARG[] = "yank_last_arg";
char const CAPITALIZE_WORD[] = "capitalize_word";
char const LOWERCASE_WORD[] = "lowercase_word";
char const UPPERCASE_WORD[] = "uppercase_word";
char const CAPITALIZE_SUBWORD[] = "capitalize_subword";
char const LOWERCASE_SUBWORD[] = "lowercase_subword";
char const UPPERCASE_SUBWORD[] = "uppercase_subword";
char const TRANSPOSE_CHARACTERS[] = "transpose_characters";
char const ABORT_LINE[] = "abort_line";
char const SEND_EOF[] = "send_eof";
char const TOGGLE_OVERWRITE_MODE[] = "toggle_overwrite_mode";
char const DELETE_CHARACTER_UNDER_CURSOR[] = "delete_character_under_cursor";
char const DELETE_CHARACTER_LEFT_OF_CURSOR[] = "delete_character_left_of_cursor";
char const COMMIT_LINE[] = "commit_line";
char const CLEAR_SCREEN[] = "clear_screen";
char const COMPLETE_NEXT[] = "complete_next";
char const COMPLETE_PREVIOUS[] = "complete_previous";
char const HISTORY_NEXT[] = "history_next";
char const HISTORY_PREVIOUS[] = "history_previous";
char const HISTORY_LAST[] = "history_last";
char const HISTORY_FIRST[] = "history_first";
char const HINT_PREVIOUS[] = "hint_previous";
char const HINT_NEXT[] = "hint_next";
char const VERBATIM_INSERT[] = "verbatim_insert";
char const SUSPEND[] = "suspend";
char const COMPLETE_LINE[] = "complete_line";
char const HISTORY_INCREMENTAL_SEARCH[] = "history_incremental_search";
char const HISTORY_COMMON_PREFIX_SEARCH[] = "history_common_prefix_search";
}
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 defaultWordBreakChars[] = " \t\v\f\a\b\r\n`~!@#$%^&*()-=+[{]}\\|;:'\",<.>/?";
/*
* All whitespaces and all non-alphanumerical characters from ASCII range
*/
char const defaultSubwordBreakChars[] = " \t\v\f\a\b\r\n`~!@#$%^&*()-=+[{]}\\|;:'\",<.>/?_";
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() );
}
class IOModeGuard {
Terminal& _terminal;
public:
IOModeGuard( Terminal& terminal_ )
: _terminal( terminal_ ) {
_terminal.disable_raw_mode();
}
~IOModeGuard( void ) {
try {
_terminal.enable_raw_mode();
} catch ( ... ) {
}
}
};
}
Replxx::ReplxxImpl::ReplxxImpl( FILE*, FILE*, FILE* )
: _utf8Buffer()
, _data()
, _pos( 0 )
, _charWidths()
, _display()
, _displayInputLength( 0 )
, _hint()
, _prefix( 0 )
, _hintSelection( -1 )
, _history()
, _killRing()
, _lastRefreshTime( now_us() )
, _refreshSkipped( false )
, _lastYankSize( 0 )
, _maxHintRows( REPLXX_MAX_HINT_ROWS )
, _hintDelay( 0 )
, _wordBreakChars( defaultWordBreakChars )
, _subwordBreakChars( defaultSubwordBreakChars )
, _completionCountCutoff( 100 )
, _overwrite( false )
, _doubleTabCompletion( false )
, _completeOnEmpty( true )
, _beepOnAmbiguousCompletion( false )
, _immediateCompletion( true )
, _bracketedPaste( false )
, _noColor( false )
, _namedActions()
, _keyPressHandlers()
, _terminal()
, _currentThread()
, _prompt( _terminal )
, _completionCallback( nullptr )
, _highlighterCallback( nullptr )
, _hintCallback( nullptr )
, _keyPresses()
, _messages()
, _completions()
, _completionContextLength( 0 )
, _completionSelection( -1 )
, _preloadedBuffer()
, _errorMessage()
, _previousSearchText()
, _modifiedState( false )
, _hintColor( Replxx::Color::GRAY )
, _hintsCache()
, _hintContextLenght( -1 )
, _hintSeed()
, _mutex() {
using namespace std::placeholders;
_namedActions[action_names::INSERT_CHARACTER] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::INSERT_CHARACTER, _1 );
_namedActions[action_names::NEW_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::NEW_LINE, _1 );
_namedActions[action_names::MOVE_CURSOR_TO_BEGINING_OF_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_BEGINING_OF_LINE, _1 );
_namedActions[action_names::MOVE_CURSOR_TO_END_OF_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_TO_END_OF_LINE, _1 );
_namedActions[action_names::MOVE_CURSOR_LEFT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_LEFT, _1 );
_namedActions[action_names::MOVE_CURSOR_RIGHT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_RIGHT, _1 );
_namedActions[action_names::MOVE_CURSOR_ONE_WORD_LEFT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_LEFT, _1 );
_namedActions[action_names::MOVE_CURSOR_ONE_WORD_RIGHT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT, _1 );
_namedActions[action_names::MOVE_CURSOR_ONE_SUBWORD_LEFT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_SUBWORD_LEFT, _1 );
_namedActions[action_names::MOVE_CURSOR_ONE_SUBWORD_RIGHT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::MOVE_CURSOR_ONE_SUBWORD_RIGHT, _1 );
_namedActions[action_names::KILL_TO_WHITESPACE_ON_LEFT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_WHITESPACE_ON_LEFT, _1 );
_namedActions[action_names::KILL_TO_END_OF_WORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_WORD, _1 );
_namedActions[action_names::KILL_TO_BEGINING_OF_WORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_BEGINING_OF_WORD, _1 );
_namedActions[action_names::KILL_TO_END_OF_SUBWORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_SUBWORD, _1 );
_namedActions[action_names::KILL_TO_BEGINING_OF_SUBWORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_BEGINING_OF_SUBWORD, _1 );
_namedActions[action_names::KILL_TO_BEGINING_OF_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_BEGINING_OF_LINE, _1 );
_namedActions[action_names::KILL_TO_END_OF_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::KILL_TO_END_OF_LINE, _1 );
_namedActions[action_names::YANK] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK, _1 );
_namedActions[action_names::YANK_CYCLE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK_CYCLE, _1 );
_namedActions[action_names::YANK_LAST_ARG] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::YANK_LAST_ARG, _1 );
_namedActions[action_names::CAPITALIZE_WORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CAPITALIZE_WORD, _1 );
_namedActions[action_names::LOWERCASE_WORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::LOWERCASE_WORD, _1 );
_namedActions[action_names::UPPERCASE_WORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::UPPERCASE_WORD, _1 );
_namedActions[action_names::CAPITALIZE_SUBWORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CAPITALIZE_SUBWORD, _1 );
_namedActions[action_names::LOWERCASE_SUBWORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::LOWERCASE_SUBWORD, _1 );
_namedActions[action_names::UPPERCASE_SUBWORD] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::UPPERCASE_SUBWORD, _1 );
_namedActions[action_names::TRANSPOSE_CHARACTERS] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::TRANSPOSE_CHARACTERS, _1 );
_namedActions[action_names::ABORT_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::ABORT_LINE, _1 );
_namedActions[action_names::SEND_EOF] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::SEND_EOF, _1 );
_namedActions[action_names::TOGGLE_OVERWRITE_MODE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::TOGGLE_OVERWRITE_MODE, _1 );
_namedActions[action_names::DELETE_CHARACTER_UNDER_CURSOR] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::DELETE_CHARACTER_UNDER_CURSOR, _1 );
_namedActions[action_names::DELETE_CHARACTER_LEFT_OF_CURSOR] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::DELETE_CHARACTER_LEFT_OF_CURSOR, _1 );
_namedActions[action_names::COMMIT_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMMIT_LINE, _1 );
_namedActions[action_names::CLEAR_SCREEN] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::CLEAR_SCREEN, _1 );
_namedActions[action_names::COMPLETE_NEXT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_NEXT, _1 );
_namedActions[action_names::COMPLETE_PREVIOUS] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_PREVIOUS, _1 );
_namedActions[action_names::HISTORY_NEXT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_NEXT, _1 );
_namedActions[action_names::HISTORY_PREVIOUS] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_PREVIOUS, _1 );
_namedActions[action_names::HISTORY_LAST] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_LAST, _1 );
_namedActions[action_names::HISTORY_FIRST] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_FIRST, _1 );
_namedActions[action_names::HINT_PREVIOUS] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HINT_PREVIOUS, _1 );
_namedActions[action_names::HINT_NEXT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HINT_NEXT, _1 );
#ifndef _WIN32
_namedActions[action_names::VERBATIM_INSERT] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::VERBATIM_INSERT, _1 );
_namedActions[action_names::SUSPEND] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::SUSPEND, _1 );
#else
_namedActions[action_names::VERBATIM_INSERT] = _namedActions[action_names::SUSPEND] = Replxx::key_press_handler_t();
#endif
_namedActions[action_names::COMPLETE_LINE] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::COMPLETE_LINE, _1 );
_namedActions[action_names::HISTORY_INCREMENTAL_SEARCH] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_INCREMENTAL_SEARCH, _1 );
_namedActions[action_names::HISTORY_COMMON_PREFIX_SEARCH] = std::bind( &ReplxxImpl::invoke, this, Replxx::ACTION::HISTORY_COMMON_PREFIX_SEARCH, _1 );
bind_key( Replxx::KEY::control( 'A' ), _namedActions.at( action_names::MOVE_CURSOR_TO_BEGINING_OF_LINE ) );
bind_key( Replxx::KEY::HOME + 0, _namedActions.at( action_names::MOVE_CURSOR_TO_BEGINING_OF_LINE ) );
bind_key( Replxx::KEY::control( 'E' ), _namedActions.at( action_names::MOVE_CURSOR_TO_END_OF_LINE ) );
bind_key( Replxx::KEY::END + 0, _namedActions.at( action_names::MOVE_CURSOR_TO_END_OF_LINE ) );
bind_key( Replxx::KEY::control( 'B' ), _namedActions.at( action_names::MOVE_CURSOR_LEFT ) );
bind_key( Replxx::KEY::LEFT + 0, _namedActions.at( action_names::MOVE_CURSOR_LEFT ) );
bind_key( Replxx::KEY::control( 'F' ), _namedActions.at( action_names::MOVE_CURSOR_RIGHT ) );
bind_key( Replxx::KEY::RIGHT + 0, _namedActions.at( action_names::MOVE_CURSOR_RIGHT ) );
bind_key( Replxx::KEY::meta( 'b' ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_LEFT ) );
bind_key( Replxx::KEY::meta( 'B' ), _namedActions.at( action_names::MOVE_CURSOR_ONE_SUBWORD_LEFT ) );
bind_key( Replxx::KEY::control( Replxx::KEY::LEFT ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_LEFT ) );
bind_key( Replxx::KEY::meta( Replxx::KEY::LEFT ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_LEFT ) ); // Emacs allows Meta, readline don't
bind_key( Replxx::KEY::meta( 'f' ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_RIGHT ) );
bind_key( Replxx::KEY::meta( 'F' ), _namedActions.at( action_names::MOVE_CURSOR_ONE_SUBWORD_RIGHT ) );
bind_key( Replxx::KEY::control( Replxx::KEY::RIGHT ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_RIGHT ) );
bind_key( Replxx::KEY::meta( Replxx::KEY::RIGHT ), _namedActions.at( action_names::MOVE_CURSOR_ONE_WORD_RIGHT ) ); // Emacs allows Meta, readline don't
bind_key( Replxx::KEY::meta( Replxx::KEY::BACKSPACE ), _namedActions.at( action_names::KILL_TO_WHITESPACE_ON_LEFT ) );
bind_key( Replxx::KEY::meta( 'd' ), _namedActions.at( action_names::KILL_TO_END_OF_WORD ) );
bind_key( Replxx::KEY::meta( 'D' ), _namedActions.at( action_names::KILL_TO_END_OF_SUBWORD ) );
bind_key( Replxx::KEY::control( 'W' ), _namedActions.at( action_names::KILL_TO_BEGINING_OF_WORD ) );
bind_key( Replxx::KEY::meta( 'W' ), _namedActions.at( action_names::KILL_TO_BEGINING_OF_SUBWORD ) );
bind_key( Replxx::KEY::control( 'U' ), _namedActions.at( action_names::KILL_TO_BEGINING_OF_LINE ) );
bind_key( Replxx::KEY::control( 'K' ), _namedActions.at( action_names::KILL_TO_END_OF_LINE ) );
bind_key( Replxx::KEY::control( 'Y' ), _namedActions.at( action_names::YANK ) );
bind_key( Replxx::KEY::meta( 'y' ), _namedActions.at( action_names::YANK_CYCLE ) );
bind_key( Replxx::KEY::meta( 'Y' ), _namedActions.at( action_names::YANK_CYCLE ) );
bind_key( Replxx::KEY::meta( '.' ), _namedActions.at( action_names::YANK_LAST_ARG ) );
bind_key( Replxx::KEY::meta( 'c' ), _namedActions.at( action_names::CAPITALIZE_WORD ) );
bind_key( Replxx::KEY::meta( 'C' ), _namedActions.at( action_names::CAPITALIZE_SUBWORD ) );
bind_key( Replxx::KEY::meta( 'l' ), _namedActions.at( action_names::LOWERCASE_WORD ) );
bind_key( Replxx::KEY::meta( 'L' ), _namedActions.at( action_names::LOWERCASE_SUBWORD ) );
bind_key( Replxx::KEY::meta( 'u' ), _namedActions.at( action_names::UPPERCASE_WORD ) );
bind_key( Replxx::KEY::meta( 'U' ), _namedActions.at( action_names::UPPERCASE_SUBWORD ) );
bind_key( Replxx::KEY::control( 'T' ), _namedActions.at( action_names::TRANSPOSE_CHARACTERS ) );
bind_key( Replxx::KEY::control( 'C' ), _namedActions.at( action_names::ABORT_LINE ) );
bind_key( Replxx::KEY::control( 'D' ), _namedActions.at( action_names::SEND_EOF ) );
bind_key( Replxx::KEY::INSERT + 0, _namedActions.at( action_names::TOGGLE_OVERWRITE_MODE ) );
bind_key( 127, _namedActions.at( action_names::DELETE_CHARACTER_UNDER_CURSOR ) );
bind_key( Replxx::KEY::DELETE + 0, _namedActions.at( action_names::DELETE_CHARACTER_UNDER_CURSOR ) );
bind_key( Replxx::KEY::BACKSPACE + 0, _namedActions.at( action_names::DELETE_CHARACTER_LEFT_OF_CURSOR ) );
bind_key( Replxx::KEY::control( 'J' ), _namedActions.at( action_names::NEW_LINE ) );
bind_key( Replxx::KEY::ENTER + 0, _namedActions.at( action_names::COMMIT_LINE ) );
bind_key( Replxx::KEY::control( 'L' ), _namedActions.at( action_names::CLEAR_SCREEN ) );
bind_key( Replxx::KEY::control( 'N' ), _namedActions.at( action_names::COMPLETE_NEXT ) );
bind_key( Replxx::KEY::control( 'P' ), _namedActions.at( action_names::COMPLETE_PREVIOUS ) );
bind_key( Replxx::KEY::DOWN + 0, _namedActions.at( action_names::HISTORY_NEXT ) );
bind_key( Replxx::KEY::UP + 0, _namedActions.at( action_names::HISTORY_PREVIOUS ) );
bind_key( Replxx::KEY::meta( '<' ), _namedActions.at( action_names::HISTORY_FIRST ) );
bind_key( Replxx::KEY::PAGE_UP + 0, _namedActions.at( action_names::HISTORY_FIRST ) );
bind_key( Replxx::KEY::meta( '>' ), _namedActions.at( action_names::HISTORY_LAST ) );
bind_key( Replxx::KEY::PAGE_DOWN + 0, _namedActions.at( action_names::HISTORY_LAST ) );
bind_key( Replxx::KEY::control( Replxx::KEY::UP ), _namedActions.at( action_names::HINT_PREVIOUS ) );
bind_key( Replxx::KEY::control( Replxx::KEY::DOWN ), _namedActions.at( action_names::HINT_NEXT ) );
#ifndef _WIN32
bind_key( Replxx::KEY::control( 'V' ), _namedActions.at( action_names::VERBATIM_INSERT ) );
bind_key( Replxx::KEY::control( 'Z' ), _namedActions.at( action_names::SUSPEND ) );
#endif
bind_key( Replxx::KEY::TAB + 0, _namedActions.at( action_names::COMPLETE_LINE ) );
bind_key( Replxx::KEY::control( 'R' ), _namedActions.at( action_names::HISTORY_INCREMENTAL_SEARCH ) );
bind_key( Replxx::KEY::control( 'S' ), _namedActions.at( action_names::HISTORY_INCREMENTAL_SEARCH ) );
bind_key( Replxx::KEY::meta( 'p' ), _namedActions.at( action_names::HISTORY_COMMON_PREFIX_SEARCH ) );
bind_key( Replxx::KEY::meta( 'P' ), _namedActions.at( action_names::HISTORY_COMMON_PREFIX_SEARCH ) );
bind_key( Replxx::KEY::meta( 'n' ), _namedActions.at( action_names::HISTORY_COMMON_PREFIX_SEARCH ) );
bind_key( Replxx::KEY::meta( 'N' ), _namedActions.at( action_names::HISTORY_COMMON_PREFIX_SEARCH ) );
bind_key( Replxx::KEY::PASTE_START, 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::NEW_LINE ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::new_line, 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<false>, code ) );
case ( Replxx::ACTION::KILL_TO_BEGINING_OF_WORD ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_word_to_left<false>, code ) );
case ( Replxx::ACTION::KILL_TO_END_OF_SUBWORD ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_word_to_right<true>, code ) );
case ( Replxx::ACTION::KILL_TO_BEGINING_OF_SUBWORD ): return ( action( SET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::kill_word_to_left<true>, 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<false>, code ) );
case ( Replxx::ACTION::MOVE_CURSOR_ONE_WORD_RIGHT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_word_right<false>, code ) );
case ( Replxx::ACTION::MOVE_CURSOR_ONE_SUBWORD_LEFT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_word_left<true>, code ) );
case ( Replxx::ACTION::MOVE_CURSOR_ONE_SUBWORD_RIGHT ): return ( action( RESET_KILL_ACTION, &Replxx::ReplxxImpl::move_one_word_right<true>, 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<false>, code ) );
case ( Replxx::ACTION::LOWERCASE_WORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::lowercase_word<false>, code ) );
case ( Replxx::ACTION::UPPERCASE_WORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::uppercase_word<false>, code ) );
case ( Replxx::ACTION::CAPITALIZE_SUBWORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::capitalize_word<true>, code ) );
case ( Replxx::ACTION::LOWERCASE_SUBWORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::lowercase_word<true>, code ) );
case ( Replxx::ACTION::UPPERCASE_SUBWORD ): return ( action( RESET_KILL_ACTION | HISTORY_RECALL_MOST_RECENT, &Replxx::ReplxxImpl::uppercase_word<true>, 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_;
}
void Replxx::ReplxxImpl::bind_key_internal( char32_t code_, char const* actionName_ ) {
named_actions_t::const_iterator it( _namedActions.find( actionName_ ) );
if ( it == _namedActions.end() ) {
throw std::runtime_error( std::string( "replxx: Unknown action name: " ).append( actionName_ ) );
}
if ( !! it->second ) {
bind_key( code_, it->second );
}
}
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;
}
if ( eventType == Terminal::EVENT_TYPE::RESIZE ) {
// caught a window resize event
// now redraw the prompt and line
_prompt.update_screen_columns();
// redraw the original prompt with current input
refresh_line( HINT_ACTION::REPAINT );
continue;
}
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(), static_cast<int>( 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 );
/* IOModeGuard scope */ {
IOModeGuard ioModeGuard( _terminal );
_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 ) {
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
return ( _terminal.install_window_change_handler() );
#else
return 0;
#endif
}
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 ) && ( ch != '\n' ) ) {
_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 = static_cast<int>( _display.size() );
_modifiedState = false;
return;
}
Replxx::colors_t colors( _data.length(), Replxx::Color::DEFAULT );
_utf8Buffer.assign( _data );
if ( !! _highlighterCallback ) {
IOModeGuard ioModeGuard( _terminal );
_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 = static_cast<int>( _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;
}
_utf8Buffer.assign( _data, _pos );
if ( ( _utf8Buffer != _hintSeed ) || ( _hintContextLenght < 0 ) ) {
_hintSeed.assign( _utf8Buffer );
_hintContextLenght = context_length();
_hintColor = Replxx::Color::GRAY;
IOModeGuard ioModeGuard( _terminal );
_hintsCache = call_hinter( _utf8Buffer.get(), _hintContextLenght, _hintColor );
}
int hintCount( static_cast<int>( _hintsCache.size() ) );
if ( hintCount == 1 ) {
_hint = _hintsCache.front();
len = _hint.length() - _hintContextLenght;
if ( len > 0 ) {
set_color( _hintColor );
for ( int i( 0 ); i < len; ++ i ) {
_display.push_back( _hint[i + _hintContextLenght] );
}
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 = _hintsCache[_hintSelection];
len = min<int>( _hint.length(), maxCol - startCol );
if ( _hintContextLenght < len ) {
set_color( _hintColor );
for ( int i( _hintContextLenght ); i < len; ++ i ) {
_display.push_back( _hint[i] );
}
set_color( Replxx::Color::DEFAULT );
}
}
startCol -= _hintContextLenght;
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( _hintColor );
for ( int i( _pos - _hintContextLenght ); ( 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( _hintsCache[hintNo % hintCount] );
for ( int i( _hintContextLenght ); ( 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 += static_cast<int>( 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 )
);
// display the input line
_terminal.write32( _display.data(), _displayInputLength );
_terminal.clear_screen( Terminal::CLEAR_SCREEN::TO_END );
_terminal.write32( _display.data() + _displayInputLength, static_cast<int>( _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<false>( _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( static_cast<int>( 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