Same name in other branches

1. 9 core/modules/ckeditor5/src/Plugin/Validation/Constraint/StyleSensibleElementConstraintValidator.php \Drupal\ckeditor5\Plugin\Validation\Constraint\StyleSensibleElementConstraintValidator::intersectionWithClasses()
2. 10 core/modules/ckeditor5/src/Plugin/Validation/Constraint/StyleSensibleElementConstraintValidator.php \Drupal\ckeditor5\Plugin\Validation\Constraint\StyleSensibleElementConstraintValidator::intersectionWithClasses()

Checks if there is an intersection on allowed 'class' attribute values.

Parameters

\Drupal\ckeditor5\HTMLRestrictions $a: One set of HTML restrictions.

\Drupal\ckeditor5\HTMLRestrictions $b: Another set of HTML restrictions.

Return value

bool Whether there is an intersection.

2 calls to StyleSensibleElementConstraintValidator::intersectionWithClasses()

StyleSensibleElementConstraintValidator::findStyleConflictingPluginLabel in core/modules/ckeditor5/src/Plugin/Validation/Constraint/StyleSensibleElementConstraintValidator.php

Finds the plugin with elements that conflict with the style element.

StyleSensibleElementConstraintValidator::validate in core/modules/ckeditor5/src/Plugin/Validation/Constraint/StyleSensibleElementConstraintValidator.php

File

core/modules/ckeditor5/src/Plugin/Validation/Constraint/StyleSensibleElementConstraintValidator.php, line 144

Class

StyleSensibleElementConstraintValidator

Styles can only be specified for HTML5 tags and extra classes.

Namespace

Drupal\ckeditor5\Plugin\Validation\Constraint

Code

private static function intersectionWithClasses(HTMLRestrictions $a, HTMLRestrictions $b) : bool {
    // Compute the intersection, but first resolve wildcards, by merging
    // tags of the other operand. Because only tags are merged, this cannot
    // introduce a 'class' attribute intersection.
    // For example: a plugin may support `<$text-container class="foo">`. On its
    // own that would not trigger an intersection, but when resolved into
    // concrete tags it could.
    $tags_from_a = array_diff(array_keys($a->getConcreteSubset()
        ->getAllowedElements()), [
        '*',
    ]);
    $tags_from_b = array_diff(array_keys($b->getConcreteSubset()
        ->getAllowedElements()), [
        '*',
    ]);
    $a = $a->merge(new HTMLRestrictions(array_fill_keys($tags_from_b, FALSE)));
    $b = $b->merge(new HTMLRestrictions(array_fill_keys($tags_from_a, FALSE)));
    // When a plugin allows all classes on a tag, we assume there is no
    // problem with having the style plugin adding classes to that element.
    // When allowing all classes we don't expect a specific user experience
    // so adding a class through a plugin or the style plugin is the same.
    $b_without_class_wildcard = $b->getAllowedElements();
    foreach ($b_without_class_wildcard as $allowedElement => $config) {
        // When all classes are allowed, remove the configuration so that
        // the intersect below does not include classes.
        if (!empty($config['class']) && $config['class'] === TRUE) {
            unset($b_without_class_wildcard[$allowedElement]['class']);
        }
        // HTMLRestrictions does not accept a tag with an empty array, make sure
        // to remove them here.
        if (empty($b_without_class_wildcard[$allowedElement])) {
            unset($b_without_class_wildcard[$allowedElement]);
        }
    }
    $intersection = $a->intersect(new HTMLRestrictions($b_without_class_wildcard));
    // Leverage the "GHS configuration" representation to easily find whether
    // there is an intersection for classes. Other implementations are possible.
    $intersection_as_ghs_config = $intersection->toGeneralHtmlSupportConfig();
    $ghs_config_classes = array_column($intersection_as_ghs_config, 'classes');
    return !empty($ghs_config_classes);
}

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