Initial commit

2024-10-01 18:46:03 +02:00
commit e2868cd7bf
16 changed files with 1036 additions and 0 deletions
--- a/src/Terminal/Terminal.php
+++ b/src/Terminal/Terminal.php
@ -0,0 +1,135 @@
+<?php
+
+namespace NoccyLabs\JEdit\Terminal;
+
+
+class Terminal
+{
+    private static int $init = 0;
+
+    private ?string $oldStty = null;
+
+    private int $lines = 0;
+
+    private int $columns = 0;
+
+    private bool $active = false;
+
+    public function __construct()
+    {
+        if (self::$init++ == 0) {
+            $this->setup();
+        }
+    }
+
+    public function __destruct()
+    {
+        if (--self::$init == 0) {
+            $this->shutdown();
+        }
+    }
+
+    private function setup(): void
+    {
+        $this->oldStty = exec("stty -g");
+        exec("stty raw -echo");
+
+        //ob_start();
+
+        echo "\e[s"; // save cursor pos
+        echo "\e[?1047h"; // alt buffer
+        echo "\e[H\e[0m\e[2J"; // clear screen
+        echo "\e[?7l"; // autowrap
+
+        //ob_flush();
+
+        $this->measureTerminal();
+        pcntl_signal(SIGWINCH, $this->measureTerminal(...));
+
+        $this->active = true;
+    }
+
+    private function measureTerminal(): void
+    {
+        $this->lines = intval(exec("tput lines"));
+        $this->columns = intval(exec("tput cols"));
+    }
+
+    public function shutdown(): void
+    {
+        //ob_end_clean();
+        if (!$this->active) return;
+
+        exec("stty {$this->oldStty}");
+
+        echo "\e[?1047l"; // main buffer
+        echo "\e[u\e[?25h"; // restore cursor pos and visibility
+        echo "\e[?7h"; // autowrap
+
+        $this->active = false;
+    }
+
+    public function getSize(): array
+    {
+        return [ $this->columns, $this->lines ];
+    }
+
+    public function setCursor(int $column, int $row, bool $visible = false): void
+    {
+        if ($row > 0 && $column > 0)
+            printf("\e[%d;%dH", $row, $column);
+        echo "\e[?25".($visible?"h":"l");
+    }
+
+    private string $inputBuffer = '';
+
+    public function readKey(): ?string
+    {
+        $r = [ STDIN ]; $w = $e = [];
+        if (stream_select($r, $w, $e, 0)) {
+            $read = fread(STDIN, 64);
+            $this->inputBuffer .= $read;
+        }
+        return $this->parseInputBuffer();
+    }
+
+    private function parseInputBuffer(): ?string
+    {
+        if (str_starts_with($this->inputBuffer, "\e")) {
+            if (strncmp($this->inputBuffer, "\e[A", 3) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 3);
+                return "k{UP}";
+            } elseif (strncmp($this->inputBuffer, "\e[B", 3) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 3);
+                return "k{DOWN}";
+            } elseif (strncmp($this->inputBuffer, "\e[C", 3) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 3);
+                return "k{RIGHT}";
+            } elseif (strncmp($this->inputBuffer, "\e[D", 3) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 3);
+                return "k{LEFT}";
+            } elseif (strncmp($this->inputBuffer, "\e[5~", 4) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 4);
+                return "k{PGUP}";
+            } elseif (strncmp($this->inputBuffer, "\e[6~", 4) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 4);
+                return "k{PGDN}";
+            } elseif (strncmp($this->inputBuffer, "\e\e", 2) === 0) {
+                $this->inputBuffer = mb_substr($this->inputBuffer, 2);
+                return chr(27);
+            }
+            $this->inputBuffer = mb_substr($this->inputBuffer, 1);
+        }
+        if (mb_strlen($this->inputBuffer) > 0) {            
+            $ch = mb_substr($this->inputBuffer, 0, 1);
+            // if (ord($ch) == 3) {
+            //     return "k{^C}";
+            // }
+            $this->inputBuffer = mb_substr($this->inputBuffer, 1);
+            return $ch;
+        }
+        return null;
+    }
+    
+}
+