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<?php
namespace Drupal\Core\Field\Plugin\Field\FieldType;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldStorageDefinitionInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\TypedData\DataDefinition;
class DecimalItem extends NumericItemBase {
public static function defaultStorageSettings() {
return array(
'precision' => 10,
'scale' => 2,
) + parent::defaultStorageSettings();
}
public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
$properties['value'] = DataDefinition::create('string')
->setLabel(t('Decimal value'))
->setRequired(TRUE);
return $properties;
}
public static function schema(FieldStorageDefinitionInterface $field_definition) {
return array(
'columns' => array(
'value' => array(
'type' => 'numeric',
'precision' => $field_definition
->getSetting('precision'),
'scale' => $field_definition
->getSetting('scale'),
),
),
);
}
public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
$element = array();
$settings = $this
->getSettings();
$range = range(10, 32);
$element['precision'] = array(
'#type' => 'select',
'#title' => t('Precision'),
'#options' => array_combine($range, $range),
'#default_value' => $settings['precision'],
'#description' => t('The total number of digits to store in the database, including those to the right of the decimal.'),
'#disabled' => $has_data,
);
$range = range(0, 10);
$element['scale'] = array(
'#type' => 'select',
'#title' => t('Scale', array(), array(
'decimal places',
)),
'#options' => array_combine($range, $range),
'#default_value' => $settings['scale'],
'#description' => t('The number of digits to the right of the decimal.'),
'#disabled' => $has_data,
);
return $element;
}
public function getConstraints() {
$constraint_manager = \Drupal::typedDataManager()
->getValidationConstraintManager();
$constraints = parent::getConstraints();
$constraints[] = $constraint_manager
->create('ComplexData', array(
'value' => array(
'Regex' => array(
'pattern' => '/^[+-]?((\\d+(\\.\\d*)?)|(\\.\\d+))$/i',
),
),
));
return $constraints;
}
public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
$element = parent::fieldSettingsForm($form, $form_state);
$settings = $this
->getSettings();
$element['min']['#step'] = pow(0.1, $settings['scale']);
$element['max']['#step'] = pow(0.1, $settings['scale']);
return $element;
}
public function preSave() {
$this->value = round($this->value, $this
->getSetting('scale'));
}
public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
$settings = $field_definition
->getSettings();
$precision = $settings['precision'] ?: 10;
$scale = $settings['scale'] ?: 2;
$max = is_numeric($settings['max']) ?: pow(10, $precision - $scale) - 1;
$min = is_numeric($settings['min']) ?: -pow(10, $precision - $scale) + 1;
$decimal_digits = self::getDecimalDigits($max);
$decimal_digits = max(self::getDecimalDigits($min), $decimal_digits);
$scale = rand($decimal_digits, $scale);
$random_decimal = $min + mt_rand() / mt_getrandmax() * ($max - $min);
$values['value'] = self::truncateDecimal($random_decimal, $scale);
return $values;
}
protected static function getDecimalDigits($decimal) {
$digits = 0;
while ($decimal - round($decimal)) {
$decimal *= 10;
$digits++;
}
return $digits;
}
}