1 files changed, 130 insertions, 0 deletions
diff --git a/vendor/league/commonmark/src/Extension/Attributes/Util/AttributesHelper.php b/vendor/league/commonmark/src/Extension/Attributes/Util/AttributesHelper.php
new file mode 100644
index 0000000000..8649abfe9c
--- /dev/null
+++ b/vendor/league/commonmark/src/Extension/Attributes/Util/AttributesHelper.php
@@ -0,0 +1,130 @@
+<?php
+
+/*
+ * This file is part of the league/commonmark package.
+ *
+ * (c) Colin O'Dell <colinodell@gmail.com>
+ * (c) 2015 Martin Hasoň <martin.hason@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace League\CommonMark\Extension\Attributes\Util;
+
+use League\CommonMark\Block\Element\AbstractBlock;
+use League\CommonMark\Cursor;
+use League\CommonMark\Inline\Element\AbstractInline;
+use League\CommonMark\Util\RegexHelper;
+
+/**
+ * @internal
+ */
+final class AttributesHelper
+{
+    /**
+     * @param Cursor $cursor
+     *
+     * @return array<string, mixed>
+     */
+    public static function parseAttributes(Cursor $cursor): array
+    {
+        $state = $cursor->saveState();
+        $cursor->advanceToNextNonSpaceOrNewline();
+        if ($cursor->getCharacter() !== '{') {
+            $cursor->restoreState($state);
+
+            return [];
+        }
+
+        $cursor->advanceBy(1);
+        if ($cursor->getCharacter() === ':') {
+            $cursor->advanceBy(1);
+        }
+
+        $attributes = [];
+        $regex = '/^\s*([.#][_a-z0-9-]+|' . RegexHelper::PARTIAL_ATTRIBUTENAME . RegexHelper::PARTIAL_ATTRIBUTEVALUESPEC . ')(?<!})\s*/i';
+        while ($attribute = \trim((string) $cursor->match($regex))) {
+            if ($attribute[0] === '#') {
+                $attributes['id'] = \substr($attribute, 1);
+
+                continue;
+            }
+
+            if ($attribute[0] === '.') {
+                $attributes['class'][] = \substr($attribute, 1);
+
+                continue;
+            }
+
+            [$name, $value] = \explode('=', $attribute, 2);
+            $first = $value[0];
+            $last = \substr($value, -1);
+            if ((($first === '"' && $last === '"') || ($first === "'" && $last === "'")) && \strlen($value) > 1) {
+                $value = \substr($value, 1, -1);
+            }
+
+            if (\strtolower(\trim($name)) === 'class') {
+                foreach (\array_filter(\explode(' ', \trim($value))) as $class) {
+                    $attributes['class'][] = $class;
+                }
+            } else {
+                $attributes[trim($name)] = trim($value);
+            }
+        }
+
+        if ($cursor->match('/}/') === null) {
+            $cursor->restoreState($state);
+
+            return [];
+        }
+
+        if ($attributes === []) {
+            $cursor->restoreState($state);
+
+            return [];
+        }
+
+        if (isset($attributes['class'])) {
+            $attributes['class'] = \implode(' ', (array) $attributes['class']);
+        }
+
+        return $attributes;
+    }
+
+    /**
+     * @param AbstractBlock|AbstractInline|array<string, mixed> $attributes1
+     * @param AbstractBlock|AbstractInline|array<string, mixed> $attributes2
+     *
+     * @return array<string, mixed>
+     */
+    public static function mergeAttributes($attributes1, $attributes2): array
+    {
+        $attributes = [];
+        foreach ([$attributes1, $attributes2] as $arg) {
+            if ($arg instanceof AbstractBlock || $arg instanceof AbstractInline) {
+                $arg = $arg->data['attributes'] ?? [];
+            }
+
+            /** @var array<string, mixed> $arg */
+            $arg = (array) $arg;
+            if (isset($arg['class'])) {
+                foreach (\array_filter(\explode(' ', \trim($arg['class']))) as $class) {
+                    $attributes['class'][] = $class;
+                }
+
+                unset($arg['class']);
+            }
+
+            $attributes = \array_merge($attributes, $arg);
+        }
+
+        if (isset($attributes['class'])) {
+            $attributes['class'] = \implode(' ', $attributes['class']);
+        }
+
+        return $attributes;
+    }
+}