Same name in other branches

1. 9 core/modules/ckeditor5/src/HTMLRestrictions.php \Drupal\ckeditor5\HTMLRestrictions::__construct()
2. 11.x core/modules/ckeditor5/src/HTMLRestrictions.php \Drupal\ckeditor5\HTMLRestrictions::__construct()

Constructs a set of HTML restrictions.

Parameters

array $elements: The allowed elements.

See also

\Drupal\filter\Plugin\FilterInterface::getHTMLRestrictions()

File

core/modules/ckeditor5/src/HTMLRestrictions.php, line 82

Class

HTMLRestrictions

Represents a set of HTML restrictions.

Namespace

Drupal\ckeditor5

Code

public function __construct(array $elements) {
    self::validateAllowedRestrictionsPhase1($elements);
    self::validateAllowedRestrictionsPhase2($elements);
    self::validateAllowedRestrictionsPhase3($elements);
    self::validateAllowedRestrictionsPhase4($elements);
    self::validateAllowedRestrictionsPhase5($elements);
    $this->elements = $elements;
    // Simplify based on the global attributes:
    // - `<p dir> <* dir>` must become `<p> <* dir>`
    // - `<p foo="b a"> <* foo="a b">` must become `<p> <* foo="a b">`
    // - `<p foo="a b c"> <* foo="a b">` must become `<p foo="c"> <* foo="a b">`
    // In other words: the restrictions on `<*>` remain untouched, but the
    // attributes and attribute values allowed by `<*>` should be omitted from
    // all other tags.
    // Note: `<*>` also allows specifying disallowed attributes, but no other
    // tags are allowed to do this. Consequently, simplification is only needed
    // if >=1 allowed attribute is present on `<*>`.
    if (count($elements) >= 2 && array_key_exists('*', $elements) && array_filter($elements['*'])) {
        // @see \Drupal\ckeditor5\HTMLRestrictions::validateAllowedRestrictionsPhase4()
        $globally_allowed_attribute_restrictions = array_filter($elements['*']);
        // Prepare to compare the restrictions of all tags with those on the
        // global attribute tag `<*>`.
        $original = [];
        $global = [];
        foreach ($elements as $tag => $restrictions) {
            // `<*>`'s attribute restrictions do not need to be compared.
            if ($tag === '*') {
                continue;
            }
            $original[$tag] = $restrictions;
            $global[$tag] = $globally_allowed_attribute_restrictions;
        }
        // The subset of attribute restrictions after diffing with those on `<*>`.
        $net_global_attribute_restrictions = (new self($original))->doDiff(new self($global))
            ->getAllowedElements(FALSE);
        // Update each tag's attribute restrictions to the subset.
        foreach ($elements as $tag => $restrictions) {
            // `<*>` remains untouched.
            if ($tag === '*') {
                continue;
            }
            $this->elements[$tag] = $net_global_attribute_restrictions[$tag] ?? FALSE;
        }
    }
}

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