Initial commit

2016-04-13 03:19:22 +02:00
commit e6f6fbe3d3
9 changed files with 982 additions and 0 deletions
--- a/lib/LineRead.php
+++ b/lib/LineRead.php
@ -0,0 +1,136 @@
+<?php
+
+namespace NoccyLabs\Shell;
+
+class LineRead
+{
+
+    const STATE_IDLE = 0;
+    const STATE_READ = 1;
+
+    protected $state = self::STATE_IDLE;
+    
+    protected $prompt = "cmd:>";
+    
+    protected $buffer = null;
+
+    protected $history = [];
+    
+    protected $posHistory = 0;
+    
+    protected $posCursor = 0;
+    
+    protected $posScroll = 0;
+    
+    protected $termWidth = 0;
+    
+    protected $sttyOld;
+
+    public function __construct()
+    {
+        stream_set_blocking(STDIN, false);
+        $this->sttyOld = exec('stty -g');
+        exec('stty raw -echo isig');
+    }
+    
+    public function __destruct()
+    {
+        exec('stty {$this->sttyOld}');
+    }
+
+    public function update()
+    {
+        if ($this->state == self::STATE_IDLE) {
+            $this->state = self::STATE_READ;
+            $this->redraw();
+        }
+        $buffer = $this->handleInput();
+        return $buffer;
+    }
+
+    public function erase()
+    {
+        fprintf(STDOUT, "\r\e[0m\e[2K");
+    }
+
+    public function redraw()
+    {
+        $prompt = $this->prompt;
+        $buffer = $this->buffer;
+        $cursor = strlen($this->prompt) + 2 + $this->posCursor - $this->posScroll;
+        fprintf(STDOUT, "\r\e[2K\e[36;1;4m%s\e[37;24m %s\e[%dG\e[0m", $prompt, $buffer, $cursor);
+    }
+    
+    protected function handleInput()
+    {
+        static $keyBuffer;
+        $readBuf = fread(STDIN, 32);
+        $keyBuffer .= $readBuf;
+        $update = false;
+        $returnBuffer = null;
+        while (strlen($keyBuffer)>0) {
+            if ($keyBuffer[0] == "\e") {
+                if ($keyBuffer[1] == "[") {
+                    $ctrlChar = substr($keyBuffer, 0,3);
+                    $keyBuffer = substr($keyBuffer, 3);
+                    $this->parseControlCode($ctrlChar);
+                }
+            } else {
+                $keyChar = $keyBuffer[0];
+                $keyCode = ord($keyChar);
+                $keyBuffer = substr($keyBuffer, 1);
+                if (($keyCode >= 32) && ($keyCode < 127)) {
+                    $edBuffer = substr($this->buffer, 0, $this->posCursor) . $keyChar . substr($this->buffer, $this->posCursor);
+                    $this->posCursor++;
+                    $this->buffer = $edBuffer;
+                    $update = true;
+                } elseif ($keyCode == 127) {
+                    if ($this->posCursor > 0) {
+                        $this->posCursor--;
+                        $edBuffer = substr($this->buffer, 0, $this->posCursor) . substr($this->buffer, $this->posCursor+1);
+                        $this->buffer = $edBuffer;
+                        $update = true;
+                    }
+                } elseif ($keyCode == 13) {
+                    $returnBuffer = $this->buffer;
+                    $this->buffer = null;
+                    $this->posCursor = 0;
+                    printf("\n");
+                    $this->state = self::STATE_IDLE;
+                }
+            }
+        }
+        if ($update) {
+            $this->redraw();
+        }
+        return $returnBuffer;
+    }
+    
+    protected function parseControlCode($code)
+    {
+        switch ($code) {
+            case "\e[D":
+                $this->posCursor = max($this->posCursor-1,0);
+                $this->redraw();
+                break;
+            case "\e[C":
+                $this->posCursor = min($this->posCursor+1,strlen($this->buffer));
+                $this->redraw();
+                break;
+            case "\e[H":
+                $this->posCursor = 0;
+                $this->redraw();
+                break;
+            case "\e[F":
+                $this->posCursor = strlen($this->buffer);
+                $this->redraw();
+                break;
+            case "\e[A": // up
+            case "\e[B": // down
+                break;
+            default:
+                fprintf(STDERR, "\n%s\n", substr($code,1));
+        }
+    }
+
+}