Adds members of this group as actual elements for rendering.

Parameters

array $element: An associative array containing the properties and children of the element.

Return value

array The modified element with all group members.

2 calls to RenderElementBase::preRenderGroup()

FormElement::preRenderGroup in core/lib/Drupal/Core/Render/Element/FormElement.php

Adds members of this group as actual elements for rendering.

RenderElement::preRenderGroup in core/lib/Drupal/Core/Render/Element/RenderElement.php

Adds members of this group as actual elements for rendering.

2 methods override RenderElementBase::preRenderGroup()

FormElement::preRenderGroup in core/lib/Drupal/Core/Render/Element/FormElement.php

Adds members of this group as actual elements for rendering.

RenderElement::preRenderGroup in core/lib/Drupal/Core/Render/Element/RenderElement.php

Adds members of this group as actual elements for rendering.

File

core/lib/Drupal/Core/Render/Element/RenderElementBase.php, line 163

Class

RenderElementBase

Provides a base class for render element plugins.

Namespace

Drupal\Core\Render\Element

Code

public static function preRenderGroup($element) {
    // The element may be rendered outside of a Form API context.
    if (!isset($element['#parents']) || !isset($element['#groups'])) {
        return $element;
    }
    // Inject group member elements belonging to this group.
    $parents = implode('][', $element['#parents']);
    $children = Element::children($element['#groups'][$parents]);
    if (!empty($children)) {
        foreach ($children as $key) {
            // Break references and indicate that the element should be rendered as
            // group member.
            $child = (array) $element['#groups'][$parents][$key];
            $child['#group_details'] = TRUE;
            // Inject the element as new child element.
            $element[] = $child;
            $sort = TRUE;
        }
        // Re-sort the element's children if we injected group member elements.
        if (isset($sort)) {
            $element['#sorted'] = FALSE;
        }
    }
    if (isset($element['#group'])) {
        // Contains form element summary functionalities.
        $element['#attached']['library'][] = 'core/drupal.form';
        $group = $element['#group'];
        // If this element belongs to a group, but the group-holding element does
        // not exist, we need to render it (at its original location).
        if (!isset($element['#groups'][$group]['#group_exists'])) {
            // Intentionally empty to clarify the flow; we simply return $element.
        }
        elseif (!empty($element['#group_details'])) {
            // Intentionally empty to clarify the flow; we simply return $element.
        }
        elseif (Element::children($element['#groups'][$group])) {
            $element['#printed'] = TRUE;
        }
    }
    return $element;
}

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