function color_palette_color_value

Determines the value for a palette color field.

Parameters

array $element: The form element whose value is being populated.

string|bool $input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

string The data that will appear in the $form_state->getValues() collection for this element. Return nothing to use the default.

File

core/modules/color/color.module, line 321

Code

function color_palette_color_value($element, $input, FormStateInterface $form_state) {
    // If we suspect a possible cross-site request forgery attack, only accept
    // hexadecimal CSS color strings from user input, to avoid problems when this
    // value is used in the JavaScript preview.
    if ($input !== FALSE) {
        // Start with the provided value for this textfield, and validate that if
        // necessary, falling back on the default value.
        $value = Textfield::valueCallback($element, $input, $form_state);
        $complete_form = $form_state->getCompleteForm();
        if (!$value || !isset($complete_form['#token']) || color_valid_hexadecimal_string($value) || \Drupal::csrfToken()->validate($form_state->getValue('form_token'), $complete_form['#token'])) {
            return $value;
        }
        else {
            return $element['#default_value'];
        }
    }
}