ImageWidget.php
Same filename in other branches
Namespace
Drupal\image\Plugin\Field\FieldWidgetFile
-
core/
modules/ image/ src/ Plugin/ Field/ FieldWidget/ ImageWidget.php
View source
<?php
namespace Drupal\image\Plugin\Field\FieldWidget;
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Image\ImageFactory;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Render\ElementInfoManagerInterface;
use Drupal\file\Entity\File;
use Drupal\file\Plugin\Field\FieldWidget\FileWidget;
use Drupal\image\Entity\ImageStyle;
/**
* Plugin implementation of the 'image_image' widget.
*
* @FieldWidget(
* id = "image_image",
* label = @Translation("Image"),
* field_types = {
* "image"
* }
* )
*/
class ImageWidget extends FileWidget {
/**
* The image factory service.
*
* @var \Drupal\Core\Image\ImageFactory
*/
protected $imageFactory;
/**
* Constructs an ImageWidget object.
*
* @param string $plugin_id
* The plugin_id for the widget.
* @param mixed $plugin_definition
* The plugin implementation definition.
* @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
* The definition of the field to which the widget is associated.
* @param array $settings
* The widget settings.
* @param array $third_party_settings
* Any third party settings.
* @param \Drupal\Core\Render\ElementInfoManagerInterface $element_info
* The element info manager service.
* @param \Drupal\Core\Image\ImageFactory $image_factory
* The image factory service.
*/
public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, array $third_party_settings, ElementInfoManagerInterface $element_info, ImageFactory $image_factory = NULL) {
parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $third_party_settings, $element_info);
$this->imageFactory = $image_factory ?: \Drupal::service('image.factory');
}
/**
* {@inheritdoc}
*/
public static function defaultSettings() {
return [
'progress_indicator' => 'throbber',
'preview_image_style' => 'thumbnail',
] + parent::defaultSettings();
}
/**
* {@inheritdoc}
*/
public function settingsForm(array $form, FormStateInterface $form_state) {
$element = parent::settingsForm($form, $form_state);
$element['preview_image_style'] = [
'#title' => t('Preview image style'),
'#type' => 'select',
'#options' => image_style_options(FALSE),
'#empty_option' => '<' . t('no preview') . '>',
'#default_value' => $this->getSetting('preview_image_style'),
'#description' => t('The preview image will be shown while editing the content.'),
'#weight' => 15,
];
return $element;
}
/**
* {@inheritdoc}
*/
public function settingsSummary() {
$summary = parent::settingsSummary();
$image_styles = image_style_options(FALSE);
// Unset possible 'No defined styles' option.
unset($image_styles['']);
// Styles could be lost because of enabled/disabled modules that defines
// their styles in code.
$image_style_setting = $this->getSetting('preview_image_style');
if (isset($image_styles[$image_style_setting])) {
$preview_image_style = t('Preview image style: @style', [
'@style' => $image_styles[$image_style_setting],
]);
}
else {
$preview_image_style = t('No preview');
}
array_unshift($summary, $preview_image_style);
return $summary;
}
/**
* Overrides \Drupal\file\Plugin\Field\FieldWidget\FileWidget::formMultipleElements().
*
* Special handling for draggable multiple widgets and 'add more' button.
*/
protected function formMultipleElements(FieldItemListInterface $items, array &$form, FormStateInterface $form_state) {
$elements = parent::formMultipleElements($items, $form, $form_state);
$cardinality = $this->fieldDefinition
->getFieldStorageDefinition()
->getCardinality();
$file_upload_help = [
'#theme' => 'file_upload_help',
'#description' => '',
'#upload_validators' => $elements[0]['#upload_validators'],
'#cardinality' => $cardinality,
];
if ($cardinality == 1) {
// If there's only one field, return it as delta 0.
if (empty($elements[0]['#default_value']['fids'])) {
$file_upload_help['#description'] = $this->getFilteredDescription();
$elements[0]['#description'] = \Drupal::service('renderer')->renderPlain($file_upload_help);
}
}
else {
$elements['#file_upload_description'] = $file_upload_help;
}
return $elements;
}
/**
* {@inheritdoc}
*/
public function formElement(FieldItemListInterface $items, $delta, array $element, array &$form, FormStateInterface $form_state) {
$element = parent::formElement($items, $delta, $element, $form, $form_state);
$field_settings = $this->getFieldSettings();
// Add image validation.
$element['#upload_validators']['file_validate_is_image'] = [];
// Add upload resolution validation.
if ($field_settings['max_resolution'] || $field_settings['min_resolution']) {
$element['#upload_validators']['file_validate_image_resolution'] = [
$field_settings['max_resolution'],
$field_settings['min_resolution'],
];
}
$extensions = $field_settings['file_extensions'];
$supported_extensions = $this->imageFactory
->getSupportedExtensions();
// If using custom extension validation, ensure that the extensions are
// supported by the current image toolkit. Otherwise, validate against all
// toolkit supported extensions.
$extensions = !empty($extensions) ? array_intersect(explode(' ', $extensions), $supported_extensions) : $supported_extensions;
$element['#upload_validators']['file_validate_extensions'][0] = implode(' ', $extensions);
// Add mobile device image capture acceptance.
$element['#accept'] = 'image/*';
// Add properties needed by process() method.
$element['#preview_image_style'] = $this->getSetting('preview_image_style');
$element['#title_field'] = $field_settings['title_field'];
$element['#title_field_required'] = $field_settings['title_field_required'];
$element['#alt_field'] = $field_settings['alt_field'];
$element['#alt_field_required'] = $field_settings['alt_field_required'];
// Default image.
$default_image = $field_settings['default_image'];
if (empty($default_image['uuid'])) {
$default_image = $this->fieldDefinition
->getFieldStorageDefinition()
->getSetting('default_image');
}
// Convert the stored UUID into a file ID.
if (!empty($default_image['uuid']) && ($entity = \Drupal::service('entity.repository')->loadEntityByUuid('file', $default_image['uuid']))) {
$default_image['fid'] = $entity->id();
}
$element['#default_image'] = !empty($default_image['fid']) ? $default_image : [];
return $element;
}
/**
* Form API callback: Processes a image_image field element.
*
* Expands the image_image type to include the alt and title fields.
*
* This method is assigned as a #process callback in formElement() method.
*/
public static function process($element, FormStateInterface $form_state, $form) {
$item = $element['#value'];
$item['fids'] = $element['fids']['#value'];
$element['#theme'] = 'image_widget';
// Add the image preview.
if (!empty($element['#files']) && $element['#preview_image_style']) {
$file = reset($element['#files']);
$variables = [
'style_name' => $element['#preview_image_style'],
'uri' => $file->getFileUri(),
];
$dimension_key = $variables['uri'] . '.image_preview_dimensions';
// Determine image dimensions.
if (isset($element['#value']['width']) && isset($element['#value']['height'])) {
$variables['width'] = $element['#value']['width'];
$variables['height'] = $element['#value']['height'];
}
elseif ($form_state->has($dimension_key)) {
$variables += $form_state->get($dimension_key);
}
else {
$image = \Drupal::service('image.factory')->get($file->getFileUri());
if ($image->isValid()) {
$variables['width'] = $image->getWidth();
$variables['height'] = $image->getHeight();
}
else {
$variables['width'] = $variables['height'] = NULL;
}
}
$element['preview'] = [
'#weight' => -10,
'#theme' => 'image_style',
'#width' => $variables['width'],
'#height' => $variables['height'],
'#style_name' => $variables['style_name'],
'#uri' => $variables['uri'],
];
// Store the dimensions in the form so the file doesn't have to be
// accessed again. This is important for remote files.
$form_state->set($dimension_key, [
'width' => $variables['width'],
'height' => $variables['height'],
]);
}
elseif (!empty($element['#default_image'])) {
$default_image = $element['#default_image'];
$file = File::load($default_image['fid']);
if (!empty($file)) {
$element['preview'] = [
'#weight' => -10,
'#theme' => 'image_style',
'#width' => $default_image['width'],
'#height' => $default_image['height'],
'#style_name' => $element['#preview_image_style'],
'#uri' => $file->getFileUri(),
];
}
}
// Add the additional alt and title fields.
$element['alt'] = [
'#title' => t('Alternative text'),
'#type' => 'textfield',
'#default_value' => isset($item['alt']) ? $item['alt'] : '',
'#description' => t('Short description of the image used by screen readers and displayed when the image is not loaded. This is important for accessibility.'),
// @see https://www.drupal.org/node/465106#alt-text
'#maxlength' => 512,
'#weight' => -12,
'#access' => (bool) $item['fids'] && $element['#alt_field'],
'#required' => $element['#alt_field_required'],
'#element_validate' => $element['#alt_field_required'] == 1 ? [
[
get_called_class(),
'validateRequiredFields',
],
] : [],
];
$element['title'] = [
'#type' => 'textfield',
'#title' => t('Title'),
'#default_value' => isset($item['title']) ? $item['title'] : '',
'#description' => t('The title is used as a tool tip when the user hovers the mouse over the image.'),
'#maxlength' => 1024,
'#weight' => -11,
'#access' => (bool) $item['fids'] && $element['#title_field'],
'#required' => $element['#title_field_required'],
'#element_validate' => $element['#title_field_required'] == 1 ? [
[
get_called_class(),
'validateRequiredFields',
],
] : [],
];
return parent::process($element, $form_state, $form);
}
/**
* Validate callback for alt and title field, if the user wants them required.
*
* This is separated in a validate function instead of a #required flag to
* avoid being validated on the process callback.
*/
public static function validateRequiredFields($element, FormStateInterface $form_state) {
// Only do validation if the function is triggered from other places than
// the image process form.
$triggering_element = $form_state->getTriggeringElement();
if (!empty($triggering_element['#submit']) && in_array('file_managed_file_submit', $triggering_element['#submit'], TRUE)) {
$form_state->setLimitValidationErrors([]);
}
}
/**
* {@inheritdoc}
*/
public function calculateDependencies() {
$dependencies = parent::calculateDependencies();
$style_id = $this->getSetting('preview_image_style');
/** @var \Drupal\image\ImageStyleInterface $style */
if ($style_id && ($style = ImageStyle::load($style_id))) {
// If this widget uses a valid image style to display the preview of the
// uploaded image, add that image style configuration entity as dependency
// of this widget.
$dependencies[$style->getConfigDependencyKey()][] = $style->getConfigDependencyName();
}
return $dependencies;
}
/**
* {@inheritdoc}
*/
public function onDependencyRemoval(array $dependencies) {
$changed = parent::onDependencyRemoval($dependencies);
$style_id = $this->getSetting('preview_image_style');
/** @var \Drupal\image\ImageStyleInterface $style */
if ($style_id && ($style = ImageStyle::load($style_id))) {
if (!empty($dependencies[$style->getConfigDependencyKey()][$style->getConfigDependencyName()])) {
/** @var \Drupal\image\ImageStyleStorageInterface $storage */
$storage = \Drupal::entityTypeManager()->getStorage($style->getEntityTypeId());
$replacement_id = $storage->getReplacementId($style_id);
// If a valid replacement has been provided in the storage, replace the
// preview image style with the replacement.
if ($replacement_id && ImageStyle::load($replacement_id)) {
$this->setSetting('preview_image_style', $replacement_id);
}
else {
$this->setSetting('preview_image_style', '');
}
// Signal that the formatter plugin settings were updated.
$changed = TRUE;
}
}
return $changed;
}
}
Classes
Title | Deprecated | Summary |
---|---|---|
ImageWidget | Plugin implementation of the 'image_image' widget. |
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