Add missing OPACITY in STYLE

Author: jbelien

src/Parser/Style.php

@@ -97,6 +97,10 @@ public function parse($content = null): StyleObject
                     intval($matches[1]),
                     intval($matches[2]),
                 ];
+            } elseif ($this->parsing === 'STYLE' && preg_match('/^OPACITY ([0-9]+)$/i', $line, $matches)) {
+                $style->opacity = intval($matches[1]);
+            } elseif ($this->parsing === 'STYLE' && preg_match('/^OPACITY (\[.+\])$/i', $line, $matches)) {
+                $style->opacity = $matches[1];
             } elseif ($this->parsing === 'STYLE' && preg_match('/^OUTLINECOLOR ([0-9]+) ([0-9]+) ([0-9]+)$/i', $line, $matches)) {
                 $style->outlinecolor = [
                     intval($matches[1]),

src/Writer/Style.php

@@ -34,6 +34,7 @@ public function write($style, int $indentSize = 0, string $indent = self::WRITER
         $this->text .= self::getText('MINSCALEDENOM', $style->minscaledenom, $indentSize + 1, $indent);
         $this->text .= self::getText('MINSIZE', $style->minsize, $indentSize + 1, $indent);
         $this->text .= self::getTextArray('OFFSET', $style->offset, $indentSize + 1, $indent);
+        $this->text .= self::getText('OPACITY', $style->opacity, $indentSize + 1, $indent);
         $this->text .= is_array($style->outlinecolor) ? self::getTextArray('OUTLINECOLOR', $style->outlinecolor, $indentSize + 1, $indent) : self::getTextString('OUTLINECOLOR', $style->outlinecolor, $indentSize + 1, $indent);
         $this->text .= self::getText('OUTLINEWIDTH', $style->outlinewidth, $indentSize + 1, $indent);