480 lines
9.9 KiB
PHP
480 lines
9.9 KiB
PHP
<?php declare(strict_types=1);
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namespace Aviat\Kilo;
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use FFI;
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use Aviat\Kilo\Enum\{C, Color, Highlight, KeyCode};
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/**
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* See if tput exists for fallback terminal size detection
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*
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* @return bool
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* @codeCoverageIgnore
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*/
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function has_tput(): bool
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{
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return str_contains(shell_exec('type tput'), ' is ');
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}
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// ----------------------------------------------------------------------------
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// ! Terminal size
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// ----------------------------------------------------------------------------
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/**
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* Get the size of the current terminal window
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*
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* @codeCoverageIgnore
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* @return array
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*/
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function get_window_size(): array
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{
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// First, try to get the answer from ioctl
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$ffi = get_ffi();
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$ws = $ffi->new('struct winsize');
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$res = $ffi->ioctl(C::STDOUT_FILENO, C::TIOCGWINSZ, FFI::addr($ws));
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if ($res === 0 && $ws->ws_col !== 0 && $ws->ws_row !== 0)
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{
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return [$ws->ws_row, $ws->ws_col];
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}
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// Try using tput
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if (has_tput())
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{
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$rows = (int)trim(shell_exec('tput lines'));
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$cols = (int)trim(shell_exec('tput cols'));
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if ($rows > 0 && $cols > 0)
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{
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return [$rows, $cols];
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}
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}
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// Worst-case, return an arbitrary 'standard' size
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return [25, 80];
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}
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// ----------------------------------------------------------------------------
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// ! C function/macro equivalents
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// ----------------------------------------------------------------------------
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/**
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* Do bit twiddling to convert a letter into
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* its Ctrl-letter equivalent ordinal ascii value
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*
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* @param string $char
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* @return int
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*/
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function ctrl_key(string $char): int
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{
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if ( ! is_ascii($char))
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{
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return -1;
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}
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// b1,100,001 (a) & b0,011,111 (0x1f) = b0,000,001 (SOH)
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// b1,100,010 (b) & b0,011,111 (0x1f) = b0,000,010 (STX)
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// ...and so on
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return ord($char) & 0x1f;
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}
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/**
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* Does the one-character string contain an ascii ordinal value?
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*
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* @param string $single_char
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* @return bool
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*/
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function is_ascii(string $single_char): bool
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{
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if (strlen($single_char) > 1)
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{
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return FALSE;
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}
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return ord($single_char) < 0x80;
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}
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/**
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* Does the one-character string contain an ascii control character?
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*
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* @param string $char
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* @return bool
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*/
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function is_ctrl(string $char): bool
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{
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$c = ord($char);
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return is_ascii($char) && ( $c === 0x7f || $c < 0x20 );
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}
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/**
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* Does the one-character string contain an ascii number?
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*
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* @param string $char
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* @return bool
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*/
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function is_digit(string $char): bool
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{
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$c = ord($char);
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return is_ascii($char) && ( $c > 0x2f && $c < 0x3a );
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}
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/**
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* Does the one-character string contain ascii whitespace?
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*
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* @param string $char
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* @return bool
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*/
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function is_space(string $char): bool
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{
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$ws = [
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KeyCode::CARRIAGE_RETURN,
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KeyCode::FORM_FEED,
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KeyCode::NEWLINE,
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KeyCode::SPACE,
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KeyCode::TAB,
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KeyCode::VERTICAL_TAB,
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];
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return is_ascii($char) && in_array($char, $ws, TRUE);
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}
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// ----------------------------------------------------------------------------
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// ! Helper functions
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// ----------------------------------------------------------------------------
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/**
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* A 'singleton' function to replace a global variable
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*
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* @return FFI
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*/
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function get_ffi(): FFI
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{
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static $ffi;
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if ($ffi === NULL)
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{
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$ffi = FFI::load(__DIR__ . '/ffi.h');
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}
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return $ffi;
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}
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/**
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* Does the one-character string contain a character that separates tokens?
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*
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* @param string $char
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* @return bool
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*/
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function is_separator(string $char): bool
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{
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if ( ! is_ascii($char))
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{
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return FALSE;
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}
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$isSep = str_contains(',.()+-/*=~%<>[];', $char);
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return is_space($char) || $char === KeyCode::NULL || $isSep;
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}
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/**
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* Pull input from the stdin stream.
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*
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* @codeCoverageIgnore
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* @param int $len
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* @return string
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*/
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function read_stdin(int $len = 128): string
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{
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$handle = fopen('php://stdin', 'rb');
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$input = fread($handle, $len);
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fclose($handle);
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return $input;
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}
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/**
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* Write to the stdout stream
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*
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* @codeCoverageIgnore
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* @param string $str
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* @param int|NULL $len
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* @return int
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*/
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function write_stdout(string $str, int $len = NULL): int
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{
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$handle = fopen('php://stdout', 'ab');
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$res = (is_int($len))
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? fwrite($handle, $str, $len)
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: fwrite($handle, $str);
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fclose($handle);
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return $res;
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}
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/**
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* Replaces a slice of an array with the same value
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*
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* @param array $array The array to update
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* @param int $offset The index of the first location to update
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* @param int $length The number of indices to update
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* @param mixed $value The value to replace in the range
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*/
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function array_replace_range(array &$array, int $offset, int $length, $value):void
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{
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if ($length === 1)
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{
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$array[$offset] = $value;
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return;
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}
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$replacement = array_fill(0, $length, $value);
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array_splice($array, $offset, $length, $replacement);
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}
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/**
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* Does the string $haystack contain $str, optionally searching from $offset?
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*
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* @param string $haystack
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* @param string $str
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* @param int|null $offset
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* @return bool
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*/
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function str_contains(string $haystack, string $str, ?int $offset = NULL): bool
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{
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if (empty($str))
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{
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return FALSE;
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}
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return ($offset !== NULL)
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? strpos($haystack, $str, $offset) !== FALSE
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: \str_contains($haystack, $str);
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}
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/**
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* Get the ASCII color escape number for the specified syntax type
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*
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* @param int $hl
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* @return int
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*/
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function syntax_to_color(int $hl): int
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{
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return match ($hl)
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{
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Highlight::COMMENT => Color::FG_CYAN,
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Highlight::ML_COMMENT => Color::FG_BRIGHT_BLACK,
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Highlight::KEYWORD1 => Color::FG_YELLOW,
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Highlight::KEYWORD2 => Color::FG_GREEN,
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Highlight::STRING => Color::FG_MAGENTA,
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Highlight::NUMBER => Color::FG_RED,
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Highlight::OPERATOR => Color::FG_BRIGHT_GREEN,
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Highlight::VARIABLE => Color::FG_BRIGHT_CYAN,
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Highlight::DELIMITER => Color::FG_BLUE,
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Highlight::INVALID => Color::BG_BRIGHT_RED,
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Highlight::MATCH => Color::INVERT,
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default => Color::FG_WHITE,
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};
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}
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/**
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* Replace tabs with the specified number of spaces.
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*
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* @param string $str
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* @param int|null $number
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* @return string
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*/
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function tabs_to_spaces(string $str, ?int $number = KILO_TAB_STOP): string
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{
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return str_replace(KeyCode::TAB, str_repeat(KeyCode::SPACE, $number), $str);
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}
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/**
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* Generate/Get the syntax highlighting objects
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*
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* @return array
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*/
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function get_file_syntax_map(): array
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{
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static $db = [];
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if (count($db) === 0)
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{
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$db = [
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Syntax::new(
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'C',
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['.c', '.h', '.cpp'],
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[
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'continue', 'typedef', 'switch', 'return', 'static', 'while', 'break', 'struct',
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'union', 'class', 'else', 'enum', 'for', 'case', 'if',
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],
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[
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'#include', 'unsigned', '#define', '#ifndef', 'double', 'signed', '#endif',
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'#ifdef', 'float', '#error', '#undef', 'long', 'char', 'int', 'void', '#if',
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],
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'//',
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'/*',
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'*/',
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Syntax::HIGHLIGHT_NUMBERS | Syntax::HIGHLIGHT_STRINGS,
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),
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Syntax::new(
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'CSS',
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['.css', '.less', '.sass', 'scss'],
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[],
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[],
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'',
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'/*',
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'*/',
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Syntax::HIGHLIGHT_NUMBERS | Syntax::HIGHLIGHT_STRINGS,
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),
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Syntax::new(
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'JavaScript',
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['.js', '.jsx', '.ts', '.tsx', '.jsm', '.mjs', '.es'],
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[
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'instanceof',
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'continue',
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'debugger',
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'function',
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'default',
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'extends',
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'finally',
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'delete',
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'export',
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'import',
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'return',
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'switch',
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'typeof',
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'break',
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'catch',
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'class',
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'const',
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'super',
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'throw',
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'while',
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'yield',
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'case',
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'else',
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'this',
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'void',
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'with',
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'from',
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'for',
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'new',
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'try',
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'var',
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'do',
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'if',
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'in',
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'as',
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],
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[
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'=>', 'Number', 'String', 'Object', 'Math', 'JSON', 'Boolean',
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],
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'//',
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'/*',
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'*/',
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Syntax::HIGHLIGHT_NUMBERS | Syntax::HIGHLIGHT_STRINGS,
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),
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Syntax::new(
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'PHP',
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['.php', 'kilo'],
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[
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'?php', '$this', '__halt_compiler', 'abstract', 'and', 'array', 'as', 'break',
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'callable', 'case', 'catch', 'class', 'clone', 'const', 'continue', 'declare',
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'default', 'die', 'do', 'echo', 'else', 'elseif', 'empty', 'enddeclare', 'endfor',
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'endforeach', 'endif', 'endswitch', 'endwhile', 'eval', 'exit', 'extends',
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'final', 'finally', 'for', 'foreach', 'function', 'global', 'goto', 'if', 'implements',
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'include', 'include_once', 'instanceof', 'insteadof', 'interface', 'isset', 'list',
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'namespace', 'new', 'or', 'print', 'private', 'protected', 'public', 'require', 'require_once',
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'return', 'static', 'switch', 'throw', 'trait', 'try', 'unset', 'use', 'var', 'while', 'xor',
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'yield', 'yield from', '__CLASS__', '__DIR__', '__FILE__', '__FUNCTION__', '__LINE__',
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'__METHOD__', '__NAMESPACE__', '__TRAIT__',
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],
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[
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'int', 'float', 'bool', 'string', 'true', 'TRUE', 'false', 'FALSE', 'null', 'NULL',
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'void', 'iterable', 'object', 'strict_types'
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],
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'//',
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'/*',
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'*/',
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Syntax::HIGHLIGHT_NUMBERS | Syntax::HIGHLIGHT_STRINGS,
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),
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Syntax::new(
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'Rust',
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['.rs'],
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[
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'continue', 'return', 'static', 'struct', 'unsafe', 'break', 'const', 'crate',
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'extern', 'match', 'super', 'trait', 'where', 'else', 'enum', 'false', 'impl',
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'loop', 'move', 'self', 'type', 'while', 'for', 'let', 'mod', 'pub', 'ref', 'true',
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'use', 'mut', 'as', 'fn', 'if', 'in',
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],
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[
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'DoubleEndedIterator',
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'ExactSizeIterator',
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'IntoIterator',
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'PartialOrd',
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'PartialEq',
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'Iterator',
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'ToString',
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'Default',
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'ToOwned',
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'Extend',
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'FnOnce',
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'Option',
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'String',
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'AsMut',
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'AsRef',
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'Clone',
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'Debug',
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'FnMut',
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'Sized',
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'Unpin',
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'array',
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'isize',
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'usize',
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'&str',
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'Copy',
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'Drop',
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'From',
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'Into',
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'None',
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'Self',
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'Send',
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'Some',
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'Sync',
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'Sync',
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'bool',
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'char',
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'i128',
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'u128',
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'Box',
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'Err',
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'Ord',
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'Vec',
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'dyn',
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'f32',
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'f64',
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'i16',
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'i32',
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'i64',
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'str',
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'u16',
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'u32',
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'u64',
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'Eq',
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'Fn',
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'Ok',
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'i8',
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'u8',
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],
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'//',
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'/*',
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'*/',
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Syntax::HIGHLIGHT_NUMBERS | Syntax::HIGHLIGHT_STRINGS,
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),
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];
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}
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return $db;
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}
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