From b8c900720c3d15c4f6723698ae94da2bdfc32bbf Mon Sep 17 00:00:00 2001
From: Dominique Fournier <dominique@fournier38.fr>
Date: Thu, 14 Jun 2018 09:21:31 +0000
Subject: [PATCH] console : manage the autocompletion : add the identical
 possibilities to the string

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@4247 bf3deb0d-5f1a-0410-827f-c0cc1f45334c
---
 console.php | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

diff --git a/console.php b/console.php
index f56163c..3b1db99 100644
--- a/console.php
+++ b/console.php
@@ -317,14 +317,37 @@ private $usleep = 0;
         else
         {
           // Multiple answers : display them
+          // Manage if all the answers start by the same chars : add them to the
+          // $string
+          if ($isAssoc)
+            $possibilities = array_keys ($completeArr);
+          else
+            $possibilities = $completeArr;
+          $addChars = $this->shortestIdenticalValues ($possibilities);
+          if ($addChars !== "")
+          {
+            $pos = mb_strrpos ($string, " ");
+            if ($pos === false)
+              $string = $addChars;
+            else
+            {
+              $string = mb_substr ($string, 0, $pos + 1).$addChars;
+            }
+          }
           if ($isAssoc)
           {
             // In associative array, the key is the possible answer to
             // autocompletion, and the value is the helper message
+
             // Get the largest key length to make a beautiful alignment
+            // Get the smaller key length to found a affined answer
             $maxlen = 0;
             foreach ($completeArr as $key => $val)
+            {
               $maxlen = max ($maxlen, mb_strlen ($key));
+            }
+
+            // Display the keys and helpers in an aligned form
             $maxlen = $maxlen + 5;
             echo "\n";
             foreach ($completeArr as $key => $val)
@@ -810,4 +833,38 @@ private $usleep = 0;
     file_put_contents ("/tmp/debug", date ("H:i:s")." $data\n", FILE_APPEND);
   }
   // }}}
+
+  /** Look in the array which first chars of each possibilites are identical.
+    * @param array $completeArr The values to examine
+    * @return string the identical chars
+    */
+  private function shortestIdenticalValues ($completeArr)
+  // {{{
+  {
+    $minlen = 99999;
+    foreach ($completeArr as $val)
+    {
+      $minlen = min ($minlen, mb_strlen ($val));
+    }
+    $identicalString = "";
+    $sameCharLength = 1 ;
+    while ($sameCharLength <= $minlen)
+    {
+      $tmp = "";
+      foreach ($completeArr as $val)
+      {
+        $part = mb_substr ($val, 0, $sameCharLength);
+        if ($tmp == "")
+          $tmp = $part;
+        if ($tmp !== $part)
+        {
+          break 2;
+        } 
+      } 
+      $identicalString = $tmp;
+      $sameCharLength++; 
+    }
+    return $identicalString;
+  }
+  // }}}
 }