Styling, abbreviated commands

src/CommandHandler.php

@@ -13,6 +13,8 @@ class CommandHandler implements EventEmitterInterface
 
     private array $commands = [];
 
+    private bool $allowAbbreviatedCommands = true;
+
     public function add(string $command, callable $handler, array $signature=[]): self
     {
         $this->commands[$command] = [ 'handler' => $handler, 'signature' => $signature ];
@@ -28,6 +30,19 @@ class CommandHandler implements EventEmitterInterface
     {
         $command = array_shift($line);
 
+        if ($this->allowAbbreviatedCommands) {
+            $candidates = array_filter(
+                array_keys($this->commands),
+                fn($c)=>str_starts_with($c,$command)
+            );
+            if (count($candidates)>2) {
+                $this->emit("candidates", [ $candidates, $shell ]);
+                return;
+            }
+            if (count($candidates)==1) {
+                $command = array_shift($candidates);
+            }
+        }
         if (!array_key_exists($command, $this->commands)) {
             $this->emit("command", [ $command, $line, $shell ]);
             return;

src/Shell.php

@@ -35,7 +35,9 @@ class Shell implements WritableStreamInterface, EventEmitterInterface
 
     private int $promptWidth = 0;
 
-    private string $promptStyle = "35;1";
+    private string $promptStyle = "36;1";
+
+    private string $inputStyle = "36";
 
     public function __construct(?ReadableStreamInterface $input=null, ?WritableStreamInterface $output=null)
     {
@@ -191,8 +193,8 @@ class Shell implements WritableStreamInterface, EventEmitterInterface
         $obuf = "\r" . "\e[{$this->promptStyle}m" . $this->prompt . "\e[0m";
         $ostr = mb_substr($this->buffer, $this->scrollOffset) . " ";
         $ostr = mb_substr($ostr, 0, $this->termWidth - $this->promptWidth);
-        $obuf .= $ostr . "\e[K\e[" . $pos . "G";
+        $obuf .= "\e[{$this->inputStyle}m" . $ostr . "\e[K\e[0m\e[" . $pos . "G";
 
         $this->ostream->write($obuf);
     }
-}
+}