Merge pull request #75 from gchaincl/master

Add autocompletion for defined functions and constants

Author: tejasmanohar

lib/Boris/Autocompletion.php

@@ -0,0 +1,51 @@
+<?php
+
+/* vim: set shiftwidth=2 expandtab softtabstop=2: */
+
+namespace Boris;
+
+class Autocompletion {
+    private $symbols = [];
+
+    public function __construct() {
+    }
+
+    public function complete($status)
+    {
+        $chunk = substr($status['line'], 0, $status['cursor']);
+
+        /**
+         * Verify if we are in a variable context
+         * Take the last word and check if the first character is a '$'
+         */
+        $tokens = preg_split('/[^a-zA-Z_\$]/', $chunk);
+        $current = end($tokens);
+        if($current && $current[0] == '$') {
+            return $this->getVariables();
+        } else {
+            return $this->getSymbols();
+        }
+    }
+
+    private function getSymbols() {
+        if(empty($this->symbols)) {
+            $this->symbols = call_user_func_array(
+                "array_merge", array_values(get_defined_functions())
+            );
+
+            $this->symbols = array_merge(
+                $this->symbols, array_keys(get_defined_constants())
+            );
+        }
+
+        return $this->symbols;
+    }
+
+    private function getVariables() {
+        /**
+         * TODO: Find a way to access EvalWorker context/scope to access vars
+         */
+        return array('this', 'container');
+    }
+
+}

lib/Boris/ReadlineClient.php

@@ -48,6 +48,15 @@ public function start($prompt, $historyFile) {
     $buf    = '';
     $lineno = 1;
 
+    $auto = new Autocompletion();
+    readline_completion_function(function($string, $index) use ($auto) {
+        $info = readline_info();
+        return $auto->complete(array(
+            'line' => substr($info['line_buffer'], 0, $info['end']),
+            'cursor' => $info['point']
+        ));
+    });
+
     for (;;) {
       $this->_clear = false;
       $line = readline(