[
'uuid' => NULL,
'alt' => '',
'title' => '',
'width' => NULL,
'height' => NULL,
],
] + parent::defaultStorageSettings();
}
/**
* {@inheritdoc}
*/
public static function defaultFieldSettings() {
$settings = [
'file_extensions' => 'png gif jpg jpeg',
'alt_field' => 1,
'alt_field_required' => 1,
'title_field' => 0,
'title_field_required' => 0,
'max_resolution' => '',
'min_resolution' => '',
'default_image' => [
'uuid' => NULL,
'alt' => '',
'title' => '',
'width' => NULL,
'height' => NULL,
],
] + parent::defaultFieldSettings();
unset($settings['description_field']);
return $settings;
}
/**
* {@inheritdoc}
*/
public static function schema(FieldStorageDefinitionInterface $field_definition) {
return [
'columns' => [
'target_id' => [
'description' => 'The ID of the file entity.',
'type' => 'int',
'unsigned' => TRUE,
],
'alt' => [
'description' => "Alternative image text, for the image's 'alt' attribute.",
'type' => 'varchar',
'length' => 512,
],
'title' => [
'description' => "Image title text, for the image's 'title' attribute.",
'type' => 'varchar',
'length' => 1024,
],
'width' => [
'description' => 'The width of the image in pixels.',
'type' => 'int',
'unsigned' => TRUE,
],
'height' => [
'description' => 'The height of the image in pixels.',
'type' => 'int',
'unsigned' => TRUE,
],
],
'indexes' => [
'target_id' => ['target_id'],
],
'foreign keys' => [
'target_id' => [
'table' => 'file_managed',
'columns' => ['target_id' => 'fid'],
],
],
];
}
/**
* {@inheritdoc}
*/
public static function propertyDefinitions(FieldStorageDefinitionInterface $field_definition) {
$properties = parent::propertyDefinitions($field_definition);
unset($properties['display']);
unset($properties['description']);
$properties['alt'] = DataDefinition::create('string')
->setLabel(t('Alternative text'))
->setDescription(t("Alternative image text, for the image's 'alt' attribute."));
$properties['title'] = DataDefinition::create('string')
->setLabel(t('Title'))
->setDescription(t("Image title text, for the image's 'title' attribute."));
$properties['width'] = DataDefinition::create('integer')
->setLabel(t('Width'))
->setDescription(t('The width of the image in pixels.'));
$properties['height'] = DataDefinition::create('integer')
->setLabel(t('Height'))
->setDescription(t('The height of the image in pixels.'));
return $properties;
}
/**
* {@inheritdoc}
*/
public function storageSettingsForm(array &$form, FormStateInterface $form_state, $has_data) {
$element = [];
// We need the field-level 'default_image' setting, and $this->getSettings()
// will only provide the instance-level one, so we need to explicitly fetch
// the field.
$settings = $this->getFieldDefinition()->getFieldStorageDefinition()->getSettings();
$scheme_options = \Drupal::service('stream_wrapper_manager')->getNames(StreamWrapperInterface::WRITE_VISIBLE);
$element['uri_scheme'] = [
'#type' => 'radios',
'#title' => t('Upload destination'),
'#options' => $scheme_options,
'#default_value' => $settings['uri_scheme'],
'#description' => t('Select where the final files should be stored. Private file storage has significantly more overhead than public files, but allows restricted access to files within this field.'),
];
// Add default_image element.
static::defaultImageForm($element, $settings);
$element['default_image']['#description'] = t('If no image is uploaded, this image will be shown on display.');
return $element;
}
/**
* {@inheritdoc}
*/
public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
// Get base form from FileItem.
$element = parent::fieldSettingsForm($form, $form_state);
$settings = $this->getSettings();
// Add maximum and minimum resolution settings.
$max_resolution = explode('x', $settings['max_resolution']) + ['', ''];
$element['max_resolution'] = [
'#type' => 'item',
'#title' => t('Maximum image resolution'),
'#element_validate' => [[get_class($this), 'validateResolution']],
'#weight' => 4.1,
'#field_prefix' => '
',
'#field_suffix' => '
',
'#description' => t('The maximum allowed image size expressed as WIDTH×HEIGHT (e.g. 640×480). Leave blank for no restriction. If a larger image is uploaded, it will be resized to reflect the given width and height. Resizing images on upload will cause the loss of EXIF data in the image.'),
];
$element['max_resolution']['x'] = [
'#type' => 'number',
'#title' => t('Maximum width'),
'#title_display' => 'invisible',
'#default_value' => $max_resolution[0],
'#min' => 1,
'#field_suffix' => ' × ',
];
$element['max_resolution']['y'] = [
'#type' => 'number',
'#title' => t('Maximum height'),
'#title_display' => 'invisible',
'#default_value' => $max_resolution[1],
'#min' => 1,
'#field_suffix' => ' ' . t('pixels'),
];
$min_resolution = explode('x', $settings['min_resolution']) + ['', ''];
$element['min_resolution'] = [
'#type' => 'item',
'#title' => t('Minimum image resolution'),
'#element_validate' => [[get_class($this), 'validateResolution']],
'#weight' => 4.2,
'#field_prefix' => '',
'#field_suffix' => '
',
'#description' => t('The minimum allowed image size expressed as WIDTH×HEIGHT (e.g. 640×480). Leave blank for no restriction. If a smaller image is uploaded, it will be rejected.'),
];
$element['min_resolution']['x'] = [
'#type' => 'number',
'#title' => t('Minimum width'),
'#title_display' => 'invisible',
'#default_value' => $min_resolution[0],
'#min' => 1,
'#field_suffix' => ' × ',
];
$element['min_resolution']['y'] = [
'#type' => 'number',
'#title' => t('Minimum height'),
'#title_display' => 'invisible',
'#default_value' => $min_resolution[1],
'#min' => 1,
'#field_suffix' => ' ' . t('pixels'),
];
// Remove the description option.
unset($element['description_field']);
// Add title and alt configuration options.
$element['alt_field'] = [
'#type' => 'checkbox',
'#title' => t('Enable Alt field'),
'#default_value' => $settings['alt_field'],
'#description' => t('The alt attribute may be used by search engines, screen readers, and when the image cannot be loaded. Enabling this field is recommended.'),
'#weight' => 9,
];
$element['alt_field_required'] = [
'#type' => 'checkbox',
'#title' => t('Alt field required'),
'#default_value' => $settings['alt_field_required'],
'#description' => t('Making this field required is recommended.'),
'#weight' => 10,
'#states' => [
'visible' => [
':input[name="settings[alt_field]"]' => ['checked' => TRUE],
],
],
];
$element['title_field'] = [
'#type' => 'checkbox',
'#title' => t('Enable Title field'),
'#default_value' => $settings['title_field'],
'#description' => t('The title attribute is used as a tooltip when the mouse hovers over the image. Enabling this field is not recommended as it can cause problems with screen readers.'),
'#weight' => 11,
];
$element['title_field_required'] = [
'#type' => 'checkbox',
'#title' => t('Title field required'),
'#default_value' => $settings['title_field_required'],
'#weight' => 12,
'#states' => [
'visible' => [
':input[name="settings[title_field]"]' => ['checked' => TRUE],
],
],
];
// Add default_image element.
static::defaultImageForm($element, $settings);
$element['default_image']['#description'] = t("If no image is uploaded, this image will be shown on display and will override the field's default image.");
return $element;
}
/**
* {@inheritdoc}
*/
public function preSave() {
parent::preSave();
$width = $this->width;
$height = $this->height;
// Determine the dimensions if necessary.
if (empty($width) || empty($height)) {
$image = \Drupal::service('image.factory')->get($this->entity->getFileUri());
if ($image->isValid()) {
$this->width = $image->getWidth();
$this->height = $image->getHeight();
}
}
}
/**
* {@inheritdoc}
*/
public static function generateSampleValue(FieldDefinitionInterface $field_definition) {
$random = new Random();
$settings = $field_definition->getSettings();
static $images = [];
$min_resolution = empty($settings['min_resolution']) ? '100x100' : $settings['min_resolution'];
$max_resolution = empty($settings['max_resolution']) ? '600x600' : $settings['max_resolution'];
$extensions = array_intersect(explode(' ', $settings['file_extensions']), ['png', 'gif', 'jpg', 'jpeg']);
$extension = array_rand(array_combine($extensions, $extensions));
// Generate a max of 5 different images.
if (!isset($images[$extension][$min_resolution][$max_resolution]) || count($images[$extension][$min_resolution][$max_resolution]) <= 5) {
$tmp_file = drupal_tempnam('temporary://', 'generateImage_');
$destination = $tmp_file . '.' . $extension;
file_unmanaged_move($tmp_file, $destination, FILE_CREATE_DIRECTORY);
if ($path = $random->image(drupal_realpath($destination), $min_resolution, $max_resolution)) {
$image = File::create();
$image->setFileUri($path);
$image->setOwnerId(\Drupal::currentUser()->id());
$image->setMimeType(\Drupal::service('file.mime_type.guesser')->guess($path));
$image->setFileName(drupal_basename($path));
$destination_dir = static::doGetUploadLocation($settings);
file_prepare_directory($destination_dir, FILE_CREATE_DIRECTORY);
$destination = $destination_dir . '/' . basename($path);
$file = file_move($image, $destination, FILE_CREATE_DIRECTORY);
$images[$extension][$min_resolution][$max_resolution][$file->id()] = $file;
}
else {
return [];
}
}
else {
// Select one of the images we've already generated for this field.
$image_index = array_rand($images[$extension][$min_resolution][$max_resolution]);
$file = $images[$extension][$min_resolution][$max_resolution][$image_index];
}
list($width, $height) = getimagesize($file->getFileUri());
$values = [
'target_id' => $file->id(),
'alt' => $random->sentences(4),
'title' => $random->sentences(4),
'width' => $width,
'height' => $height,
];
return $values;
}
/**
* Element validate function for resolution fields.
*/
public static function validateResolution($element, FormStateInterface $form_state) {
if (!empty($element['x']['#value']) || !empty($element['y']['#value'])) {
foreach (['x', 'y'] as $dimension) {
if (!$element[$dimension]['#value']) {
// We expect the field name placeholder value to be wrapped in t()
// here, so it won't be escaped again as it's already marked safe.
$form_state->setError($element[$dimension], t('Both a height and width value must be specified in the @name field.', ['@name' => $element['#title']]));
return;
}
}
$form_state->setValueForElement($element, $element['x']['#value'] . 'x' . $element['y']['#value']);
}
else {
$form_state->setValueForElement($element, '');
}
}
/**
* Builds the default_image details element.
*
* @param array $element
* The form associative array passed by reference.
* @param array $settings
* The field settings array.
*/
protected function defaultImageForm(array &$element, array $settings) {
$element['default_image'] = [
'#type' => 'details',
'#title' => t('Default image'),
'#open' => TRUE,
];
// Convert the stored UUID to a FID.
$fids = [];
$uuid = $settings['default_image']['uuid'];
if ($uuid && ($file = $this->getEntityManager()->loadEntityByUuid('file', $uuid))) {
$fids[0] = $file->id();
}
$element['default_image']['uuid'] = [
'#type' => 'managed_file',
'#title' => t('Image'),
'#description' => t('Image to be shown if no image is uploaded.'),
'#default_value' => $fids,
'#upload_location' => $settings['uri_scheme'] . '://default_images/',
'#element_validate' => [
'\Drupal\file\Element\ManagedFile::validateManagedFile',
[get_class($this), 'validateDefaultImageForm'],
],
'#upload_validators' => $this->getUploadValidators(),
];
$element['default_image']['alt'] = [
'#type' => 'textfield',
'#title' => t('Alternative text'),
'#description' => t('This text will be used by screen readers, search engines, and when the image cannot be loaded.'),
'#default_value' => $settings['default_image']['alt'],
'#maxlength' => 512,
];
$element['default_image']['title'] = [
'#type' => 'textfield',
'#title' => t('Title'),
'#description' => t('The title attribute is used as a tooltip when the mouse hovers over the image.'),
'#default_value' => $settings['default_image']['title'],
'#maxlength' => 1024,
];
$element['default_image']['width'] = [
'#type' => 'value',
'#value' => $settings['default_image']['width'],
];
$element['default_image']['height'] = [
'#type' => 'value',
'#value' => $settings['default_image']['height'],
];
}
/**
* Validates the managed_file element for the default Image form.
*
* This function ensures the fid is a scalar value and not an array. It is
* assigned as a #element_validate callback in
* \Drupal\image\Plugin\Field\FieldType\ImageItem::defaultImageForm().
*
* @param array $element
* The form element to process.
* @param \Drupal\Core\Form\FormStateInterface $form_state
* The form state.
*/
public static function validateDefaultImageForm(array &$element, FormStateInterface $form_state) {
// Consolidate the array value of this field to a single FID as #extended
// for default image is not TRUE and this is a single value.
if (isset($element['fids']['#value'][0])) {
$value = $element['fids']['#value'][0];
// Convert the file ID to a uuid.
if ($file = \Drupal::entityManager()->getStorage('file')->load($value)) {
$value = $file->uuid();
}
}
else {
$value = '';
}
$form_state->setValueForElement($element, $value);
}
/**
* {@inheritdoc}
*/
public function isDisplayed() {
// Image items do not have per-item visibility settings.
return TRUE;
}
/**
* Gets the entity manager.
*
* @return \Drupal\Core\Entity\EntityManagerInterface
*/
protected function getEntityManager() {
if (!isset($this->entityManager)) {
$this->entityManager = \Drupal::entityManager();
}
return $this->entityManager;
}
}