Tweak Helper/Html

Author: oleibman

src/PhpSpreadsheet/Helper/Html.php

@@ -13,7 +13,7 @@
 
 class Html
 {
-    private const COLOUR_MAP = [
+    protected const COLOUR_MAP = [
         'aliceblue' => 'f0f8ff',
         'antiquewhite' => 'faebd7',
         'antiquewhite1' => 'ffefdb',
@@ -552,48 +552,10 @@ class Html
     private bool $strikethrough = false;
 
     /** @var callable[] */
-    private array $startTagCallbacks;
+    protected array $startTagCallbacks;
 
     /** @var callable[] */
-    private array $endTagCallbacks;
-
-    public function __construct()
-    {
-        $this->startTagCallbacks = [
-            'font' => $this->startFontTag(...),
-            'b' => $this->startBoldTag(...),
-            'strong' => $this->startBoldTag(...),
-            'i' => $this->startItalicTag(...),
-            'em' => $this->startItalicTag(...),
-            'u' => $this->startUnderlineTag(...),
-            'ins' => $this->startUnderlineTag(...),
-            'del' => $this->startStrikethruTag(...),
-            's' => $this->startStrikethruTag(...),
-            'sup' => $this->startSuperscriptTag(...),
-            'sub' => $this->startSubscriptTag(...),
-        ];
-        $this->endTagCallbacks = [
-            'font' => $this->endFontTag(...),
-            'b' => $this->endBoldTag(...),
-            'strong' => $this->endBoldTag(...),
-            'i' => $this->endItalicTag(...),
-            'em' => $this->endItalicTag(...),
-            'u' => $this->endUnderlineTag(...),
-            'ins' => $this->endUnderlineTag(...),
-            'del' => $this->endStrikethruTag(...),
-            's' => $this->endStrikethruTag(...),
-            'sup' => $this->endSuperscriptTag(...),
-            'sub' => $this->endSubscriptTag(...),
-            'br' => $this->breakTag(...),
-            'p' => $this->breakTag(...),
-            'h1' => $this->breakTag(...),
-            'h2' => $this->breakTag(...),
-            'h3' => $this->breakTag(...),
-            'h4' => $this->breakTag(...),
-            'h5' => $this->breakTag(...),
-            'h6' => $this->breakTag(...),
-        ];
-    }
+    protected array $endTagCallbacks;
 
     private array $stack = [];
 
@@ -603,6 +565,48 @@ public function __construct()
 
     private bool $preserveWhiteSpace = false;
 
+    public function __construct()
+    {
+        if (!isset($this->startTagCallbacks)) {
+            $this->startTagCallbacks = [
+                'font' => $this->startFontTag(...),
+                'b' => $this->startBoldTag(...),
+                'strong' => $this->startBoldTag(...),
+                'i' => $this->startItalicTag(...),
+                'em' => $this->startItalicTag(...),
+                'u' => $this->startUnderlineTag(...),
+                'ins' => $this->startUnderlineTag(...),
+                'del' => $this->startStrikethruTag(...),
+                's' => $this->startStrikethruTag(...),
+                'sup' => $this->startSuperscriptTag(...),
+                'sub' => $this->startSubscriptTag(...),
+            ];
+        }
+        if (!isset($this->endTagCallbacks)) {
+            $this->endTagCallbacks = [
+                'font' => $this->endFontTag(...),
+                'b' => $this->endBoldTag(...),
+                'strong' => $this->endBoldTag(...),
+                'i' => $this->endItalicTag(...),
+                'em' => $this->endItalicTag(...),
+                'u' => $this->endUnderlineTag(...),
+                'ins' => $this->endUnderlineTag(...),
+                'del' => $this->endStrikethruTag(...),
+                's' => $this->endStrikethruTag(...),
+                'sup' => $this->endSuperscriptTag(...),
+                'sub' => $this->endSubscriptTag(...),
+                'br' => $this->breakTag(...),
+                'p' => $this->breakTag(...),
+                'h1' => $this->breakTag(...),
+                'h2' => $this->breakTag(...),
+                'h3' => $this->breakTag(...),
+                'h4' => $this->breakTag(...),
+                'h5' => $this->breakTag(...),
+                'h6' => $this->breakTag(...),
+            ];
+        }
+    }
+
     private function initialise(): void
     {
         $this->face = $this->size = $this->color = null;
@@ -707,7 +711,7 @@ private function rgbToColour(string $rgbValue): string
 
     public static function colourNameLookup(string $colorName): string
     {
-        return self::COLOUR_MAP[$colorName] ?? '';
+        return static::COLOUR_MAP[$colorName] ?? '';
     }
 
     protected function startFontTag(DOMElement $tag): void