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<?php |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* (c) 2015 Martin Hasoň <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace League\CommonMark\Extension\Attributes\Util; |
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use League\CommonMark\Node\Node; |
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use League\CommonMark\Parser\Cursor; |
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use League\CommonMark\Util\RegexHelper; |
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/** |
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* @internal |
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*/ |
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final class AttributesHelper |
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{ |
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private const SINGLE_ATTRIBUTE = '\s*([.]-?[_a-z][^\s}]*|[#][^\s}]+|' . RegexHelper::PARTIAL_ATTRIBUTENAME . RegexHelper::PARTIAL_ATTRIBUTEVALUESPEC . '?)\s*'; |
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private const ATTRIBUTE_LIST = '/^{:?(' . self::SINGLE_ATTRIBUTE . ')+}/i'; |
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/** |
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* @return array<string, mixed> |
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*/ |
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public static function parseAttributes(Cursor $cursor): array |
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{ |
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$state = $cursor->saveState(); |
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$cursor->advanceToNextNonSpaceOrNewline(); |
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// Quick check to see if we might have attributes |
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if ($cursor->getCharacter() !== '{') { |
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$cursor->restoreState($state); |
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return []; |
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} |
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// Attempt to match the entire attribute list expression |
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// While this is less performant than checking for '{' now and '}' later, it simplifies |
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// matching individual attributes since they won't need to look ahead for the closing '}' |
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// while dealing with the fact that attributes can technically contain curly braces. |
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// So we'll just match the start and end braces up front. |
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$attributeExpression = $cursor->match(self::ATTRIBUTE_LIST); |
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if ($attributeExpression === null) { |
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$cursor->restoreState($state); |
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return []; |
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} |
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// Trim the leading '{' or '{:' and the trailing '}' |
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$attributeExpression = \ltrim(\substr($attributeExpression, 1, -1), ':'); |
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$attributeCursor = new Cursor($attributeExpression); |
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/** @var array<string, mixed> $attributes */ |
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$attributes = []; |
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while ($attribute = \trim((string) $attributeCursor->match('/^' . self::SINGLE_ATTRIBUTE . '/i'))) { |
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if ($attribute[0] === '#') { |
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$attributes['id'] = \substr($attribute, 1); |
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continue; |
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} |
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if ($attribute[0] === '.') { |
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$attributes['class'][] = \substr($attribute, 1); |
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continue; |
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} |
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$parts = \explode('=', $attribute, 2); |
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if (\count($parts) === 1) { |
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$attributes[$attribute] = true; |
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continue; |
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} |
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/** @psalm-suppress PossiblyUndefinedArrayOffset */ |
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[$name, $value] = $parts; |
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$first = $value[0]; |
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$last = \substr($value, -1); |
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if (($first === '"' && $last === '"') || ($first === "'" && $last === "'") && \strlen($value) > 1) { |
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$value = \substr($value, 1, -1); |
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} |
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if (\strtolower(\trim($name)) === 'class') { |
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foreach (\array_filter(\explode(' ', \trim($value))) as $class) { |
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$attributes['class'][] = $class; |
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} |
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} else { |
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$attributes[\trim($name)] = \trim($value); |
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} |
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} |
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if (isset($attributes['class'])) { |
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$attributes['class'] = \implode(' ', (array) $attributes['class']); |
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} |
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return $attributes; |
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} |
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/** |
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* @param Node|array<string, mixed> $attributes1 |
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* @param Node|array<string, mixed> $attributes2 |
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* |
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* @return array<string, mixed> |
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*/ |
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public static function mergeAttributes($attributes1, $attributes2): array |
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{ |
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$attributes = []; |
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foreach ([$attributes1, $attributes2] as $arg) { |
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if ($arg instanceof Node) { |
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$arg = $arg->data->get('attributes'); |
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} |
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/** @var array<string, mixed> $arg */ |
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$arg = (array) $arg; |
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if (isset($arg['class'])) { |
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if (\is_string($arg['class'])) { |
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$arg['class'] = \array_filter(\explode(' ', \trim($arg['class']))); |
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} |
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foreach ($arg['class'] as $class) { |
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$attributes['class'][] = $class; |
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} |
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unset($arg['class']); |
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} |
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$attributes = \array_merge($attributes, $arg); |
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} |
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if (isset($attributes['class'])) { |
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$attributes['class'] = \implode(' ', $attributes['class']); |
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} |
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return $attributes; |
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} |
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} |
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thephpleague /
commonmark
