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CRAP | |
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| Termios | |
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| <?php declare(strict_types=1); | |
| namespace Aviat\Kilo; | |
| use FFI; | |
| use FFI\CData; | |
| use Aviat\Kilo\Enum\C; | |
| /** | |
| * An implicit singleton wrapper around terminal settings to simplify enabling/disabling raw mode | |
| */ | |
| class Termios { | |
| private CData $originalTermios; | |
| private function __construct() | |
| { | |
| $ffi = get_ffi(); | |
| $termios = $ffi->new('struct termios'); | |
| $res = $ffi->tcgetattr(C::STDIN_FILENO, FFI::addr($termios)); | |
| if ($res === -1) | |
| { | |
| throw new TermiosException('Failed to get existing terminal settings'); | |
| } | |
| $this->originalTermios = $termios; | |
| } | |
| /** | |
| * Put the current terminal into raw input mode | |
| * | |
| * Returns TRUE if successful. Will return NULL if run more than once, as | |
| * raw mode is pretty binary...there's no point in reapplying raw mode! | |
| * | |
| * @return bool|null | |
| */ | |
| public static function enableRawMode(): ?bool | |
| { | |
| static $run = FALSE; | |
| // Don't run this more than once! | |
| if ($run === TRUE) | |
| { | |
| return NULL; | |
| } | |
| $run = TRUE; | |
| $instance = self::getInstance(); | |
| // Make sure to restore normal mode on exit/die/crash | |
| register_shutdown_function([static::class, 'disableRawMode']); | |
| $termios = clone $instance->originalTermios; | |
| // $termios->c_iflag &= ~(C::BRKINT | C::ICRNL | C::INPCK | C::ISTRIP | C::IXON); | |
| // $termios->c_oflag &= ~(C::OPOST); | |
| $termios->c_iflag = 0; | |
| $termios->c_oflag = 0; | |
| $termios->c_cflag |= (C::CS8); | |
| $termios->c_lflag &= ~( C::ECHO | C::ICANON | C::IEXTEN | C::ISIG ); | |
| $termios->c_cc[C::VMIN] = 0; | |
| $termios->c_cc[C::VTIME] = 1; | |
| // Turn on raw mode | |
| $res = get_ffi()->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($termios)); | |
| return $res !== -1; | |
| } | |
| /** | |
| * Restores terminal settings that were changed when going into raw mode. | |
| * | |
| * Returns TRUE if settings are applied successfully. If raw mode was not | |
| * enabled, this will output a line of escape codes and a new line. | |
| * | |
| * @return bool | |
| */ | |
| public static function disableRawMode(): bool | |
| { | |
| $instance = self::getInstance(); | |
| // Cleanup | |
| write_stdout(ANSI::CLEAR_SCREEN); | |
| write_stdout(ANSI::RESET_CURSOR); | |
| write_stdout("\n"); // New line, please | |
| $res = get_ffi()->tcsetattr(C::STDIN_FILENO, C::TCSAFLUSH, FFI::addr($instance->originalTermios)); | |
| return $res !== -1; | |
| } | |
| private static function getInstance(): self | |
| { | |
| static $instance; | |
| if ($instance === NULL) | |
| { | |
| $instance = new self(); | |
| } | |
| return $instance; | |
| } | |
| } |