124 lines
3.9 KiB
PHP
124 lines
3.9 KiB
PHP
<?php
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namespace Drupal\fraction\Plugin\Field\FieldWidget;
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use Drupal\Core\Field\FieldFilteredMarkup;
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use Drupal\Core\Field\FieldItemListInterface;
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use Drupal\Core\Field\WidgetBase;
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use Drupal\Core\Form\FormStateInterface;
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/**
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* Plugin implementation of the 'fraction_decimal' widget.
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*
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* @FieldWidget(
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* id = "fraction_decimal",
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* label = @Translation("Decimal"),
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* field_types = {
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* "fraction"
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* }
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* )
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*/
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class FractionDecimalWidget extends WidgetBase {
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/**
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* {@inheritdoc}
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*/
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public static function defaultSettings() {
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return [
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'precision' => 0,
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'auto_precision' => TRUE,
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] + parent::defaultSettings();
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}
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/**
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* {@inheritdoc}
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*/
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public function settingsForm(array $form, FormStateInterface $form_state) {
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// Decimal precision.
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$elements['precision'] = [
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'#type' => 'number',
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'#title' => $this->t('Decimal precision'),
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'#description' => $this->t('Specify the number of digits after the decimal place to display when converting the fraction to a decimal. When "Auto precision" is enabled, this value essentially becomes a minimum fallback precision.'),
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'#default_value' => $this->getSetting('precision'),
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'#required' => TRUE,
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'#weight' => 0,
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];
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// Auto precision.
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$elements['auto_precision'] = [
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'#type' => 'checkbox',
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'#title' => $this->t('Auto precision'),
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'#description' => $this->t('Automatically determine the maximum precision if the fraction has a base-10 denominator. For example, 1/100 would have a precision of 2, 1/1000 would have a precision of 3, etc.'),
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'#default_value' => $this->getSetting('auto_precision'),
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'#weight' => 1,
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];
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return $elements;
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}
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/**
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* {@inheritdoc}
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*/
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public function settingsSummary() {
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$summary = parent::settingsSummary();
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// Summarize the precision setting.
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$precision = $this->getSetting('precision');
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$auto_precision = !empty($this->getSetting('auto_precision')) ? 'On' : 'Off';
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$summary[] = $this->t('Precision: @precision, Auto-precision: @auto_precision', [
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'@precision' => $precision,
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'@auto_precision' => $auto_precision,
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]);
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return $summary;
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}
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/**
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* {@inheritdoc}
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*/
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public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
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// Add a 'decimal' textfield for capturing the decimal value.
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// The default value is converted to a decimal with the specified precision.
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$precision = $this->getSetting('precision');
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$auto_precision = !empty($this->getSetting('auto_precision')) ? TRUE : FALSE;
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$element['decimal'] = $element + [
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'#type' => 'fraction_decimal',
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'#default_value' => $items->isEmpty() ? '' : $items[$delta]->fraction->toDecimal($precision, $auto_precision),
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];
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$field_settings = $this->getFieldSettings();
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// Set minimum and maximum.
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if (isset($field_settings['min']) && is_numeric($field_settings['min'])) {
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$element['#min'] = $field_settings['min'];
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}
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if (isset($field_settings['max']) && is_numeric($field_settings['max'])) {
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$element['#max'] = $field_settings['max'];
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}
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// Add prefix and suffix.
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if ($field_settings['prefix']) {
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$prefixes = explode('|', $field_settings['prefix']);
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$element['decimal']['#field_prefix'] = FieldFilteredMarkup::create(array_pop($prefixes));
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}
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if ($field_settings['suffix']) {
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$suffixes = explode('|', $field_settings['suffix']);
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$element['decimal']['#field_suffix'] = FieldFilteredMarkup::create(array_pop($suffixes));
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}
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return $element;
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}
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/**
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* {@inheritdoc}
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*/
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public function massageFormValues(array $values, array $form, FormStateInterface $form_state) {
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foreach ($values as &$value) {
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// Remove the fraction form element wrapper if it exists to make the
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// FractionItem::setValue method more consistent.
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$value = $value['decimal'] ?? $value;
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}
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return $values;
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}
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}
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