show number of candidates in tooltip

app.js

@@ -38,8 +38,9 @@ window.onload = function() {
         box.neighbourhood = new Set(rows[box.rowId].concat(columns[box.columnId]).concat(regions[box.regionId]))
         box.neighbourhood.delete(box)
         box.neighbourhood = Array.from(box.neighbourhood)
+        searchCandidatesOf(box)
     })
-    boxes.forEach(searchCandidatesOf)
+    
     enableButtons()
     highlightAndTab()
     
@@ -58,6 +59,8 @@ window.onload = function() {
 function searchCandidatesOf(box) {
     box.candidates = new Set(VALUES)
     box.neighbourhood.forEach(neighbour => box.candidates.delete(neighbour.value))
+    if (!box.disabled)
+        box.title = box.candidates.size + (box.candidates.size <= 1 ? " possibilité [Clic-droit]" : " possibilités [Clic-droit]")
 }
 
 function onfocus() {

game.php

@@ -33,15 +33,19 @@
 <?php
             for ($column = 0; $column < 9; $column++) {
                 $value = $gridStr[9*$row+$column];
-                if ($value == UNKNOWN) {
-                    $value = "";
-                    $disabled = "";
-                } else {
-                    $disabled = "disabled";
-                }
 ?>
                             <td>
-                                <input type='number' min='1' max='9' step='1' value='<?=$value?>' title='Valeurs possibles [Clic-droit]' <?=$disabled?>/>
+<?php
+                if ($value == UNKNOWN) {
+?>
+                                <input type='number' min='1' max='9' step='1' value='' title='Valeurs possibles [Clic-droit]'/>
+<?php
+                } else {
+?>
+                                <input type='number' min='1' max='9' step='1' value='<?=$value?>' disabled/>
+<?php
+                }
+?>
                             </td>
 <?php
             }