137 lines
3.8 KiB
PHP
137 lines
3.8 KiB
PHP
<?php
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namespace NoccyLabs\Shell;
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class LineRead
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{
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const STATE_IDLE = 0;
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const STATE_READ = 1;
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protected $state = self::STATE_IDLE;
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protected $prompt = "cmd:>";
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protected $buffer = null;
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protected $history = [];
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protected $posHistory = 0;
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protected $posCursor = 0;
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protected $posScroll = 0;
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protected $termWidth = 0;
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protected $sttyOld;
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public function __construct()
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{
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stream_set_blocking(STDIN, false);
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$this->sttyOld = exec('stty -g');
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exec('stty raw -echo isig');
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}
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public function __destruct()
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{
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exec('stty {$this->sttyOld}');
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}
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public function update()
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{
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if ($this->state == self::STATE_IDLE) {
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$this->state = self::STATE_READ;
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$this->redraw();
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}
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$buffer = $this->handleInput();
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return $buffer;
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}
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public function erase()
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{
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fprintf(STDOUT, "\r\e[0m\e[2K");
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}
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public function redraw()
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{
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$prompt = $this->prompt;
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$buffer = $this->buffer;
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$cursor = strlen($this->prompt) + 2 + $this->posCursor - $this->posScroll;
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fprintf(STDOUT, "\r\e[2K\e[36;1;4m%s\e[37;24m %s\e[%dG\e[0m", $prompt, $buffer, $cursor);
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}
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protected function handleInput()
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{
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static $keyBuffer;
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$readBuf = fread(STDIN, 32);
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$keyBuffer .= $readBuf;
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$update = false;
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$returnBuffer = null;
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while (strlen($keyBuffer)>0) {
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if ($keyBuffer[0] == "\e") {
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if ($keyBuffer[1] == "[") {
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$ctrlChar = substr($keyBuffer, 0,3);
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$keyBuffer = substr($keyBuffer, 3);
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$this->parseControlCode($ctrlChar);
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}
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} else {
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$keyChar = $keyBuffer[0];
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$keyCode = ord($keyChar);
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$keyBuffer = substr($keyBuffer, 1);
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if (($keyCode >= 32) && ($keyCode < 127)) {
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$edBuffer = substr($this->buffer, 0, $this->posCursor) . $keyChar . substr($this->buffer, $this->posCursor);
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$this->posCursor++;
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$this->buffer = $edBuffer;
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$update = true;
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} elseif ($keyCode == 127) {
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if ($this->posCursor > 0) {
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$this->posCursor--;
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$edBuffer = substr($this->buffer, 0, $this->posCursor) . substr($this->buffer, $this->posCursor+1);
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$this->buffer = $edBuffer;
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$update = true;
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}
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} elseif ($keyCode == 13) {
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$returnBuffer = $this->buffer;
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$this->buffer = null;
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$this->posCursor = 0;
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printf("\n");
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$this->state = self::STATE_IDLE;
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}
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}
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}
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if ($update) {
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$this->redraw();
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}
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return $returnBuffer;
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}
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protected function parseControlCode($code)
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{
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switch ($code) {
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case "\e[D":
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$this->posCursor = max($this->posCursor-1,0);
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$this->redraw();
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break;
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case "\e[C":
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$this->posCursor = min($this->posCursor+1,strlen($this->buffer));
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$this->redraw();
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break;
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case "\e[H":
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$this->posCursor = 0;
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$this->redraw();
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break;
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case "\e[F":
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$this->posCursor = strlen($this->buffer);
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$this->redraw();
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break;
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case "\e[A": // up
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case "\e[B": // down
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break;
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default:
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fprintf(STDERR, "\n%s\n", substr($code,1));
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}
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}
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}
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