135 lines
3.7 KiB
PHP
135 lines
3.7 KiB
PHP
<?php
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namespace NoccyLabs\JEdit\Terminal;
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class Terminal
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{
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private static int $init = 0;
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private ?string $oldStty = null;
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private int $lines = 0;
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private int $columns = 0;
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private bool $active = false;
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public function __construct()
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{
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if (self::$init++ == 0) {
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$this->setup();
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}
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}
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public function __destruct()
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{
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if (--self::$init == 0) {
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$this->shutdown();
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}
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}
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private function setup(): void
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{
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$this->oldStty = exec("stty -g");
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exec("stty raw -echo");
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//ob_start();
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echo "\e[s"; // save cursor pos
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echo "\e[?1047h"; // alt buffer
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echo "\e[H\e[0m\e[2J"; // clear screen
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echo "\e[?7l"; // autowrap
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//ob_flush();
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$this->measureTerminal();
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pcntl_signal(SIGWINCH, $this->measureTerminal(...));
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$this->active = true;
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}
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private function measureTerminal(): void
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{
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$this->lines = intval(exec("tput lines"));
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$this->columns = intval(exec("tput cols"));
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}
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public function shutdown(): void
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{
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//ob_end_clean();
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if (!$this->active) return;
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exec("stty {$this->oldStty}");
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echo "\e[?1047l"; // main buffer
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echo "\e[u\e[?25h"; // restore cursor pos and visibility
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echo "\e[?7h"; // autowrap
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$this->active = false;
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}
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public function getSize(): array
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{
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return [ $this->columns, $this->lines ];
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}
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public function setCursor(int $column, int $row, bool $visible = false): void
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{
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if ($row > 0 && $column > 0)
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printf("\e[%d;%dH", $row, $column);
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echo "\e[?25".($visible?"h":"l");
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}
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private string $inputBuffer = '';
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public function readKey(): ?string
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{
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$r = [ STDIN ]; $w = $e = [];
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if (stream_select($r, $w, $e, 0)) {
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$read = fread(STDIN, 64);
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$this->inputBuffer .= $read;
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}
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return $this->parseInputBuffer();
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}
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private function parseInputBuffer(): ?string
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{
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if (str_starts_with($this->inputBuffer, "\e")) {
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if (strncmp($this->inputBuffer, "\e[A", 3) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 3);
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return "k{UP}";
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} elseif (strncmp($this->inputBuffer, "\e[B", 3) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 3);
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return "k{DOWN}";
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} elseif (strncmp($this->inputBuffer, "\e[C", 3) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 3);
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return "k{RIGHT}";
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} elseif (strncmp($this->inputBuffer, "\e[D", 3) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 3);
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return "k{LEFT}";
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} elseif (strncmp($this->inputBuffer, "\e[5~", 4) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 4);
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return "k{PGUP}";
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} elseif (strncmp($this->inputBuffer, "\e[6~", 4) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 4);
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return "k{PGDN}";
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} elseif (strncmp($this->inputBuffer, "\e\e", 2) === 0) {
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$this->inputBuffer = mb_substr($this->inputBuffer, 2);
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return chr(27);
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}
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$this->inputBuffer = mb_substr($this->inputBuffer, 1);
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}
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if (mb_strlen($this->inputBuffer) > 0) {
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$ch = mb_substr($this->inputBuffer, 0, 1);
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// if (ord($ch) == 3) {
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// return "k{^C}";
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// }
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$this->inputBuffer = mb_substr($this->inputBuffer, 1);
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return $ch;
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}
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return null;
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}
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}
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