class PdfThumbnail in PDF 8

Plugin annotation


@FieldFormatter(
 id = "pdf_thumbnail",
 label = @Translation("PDF: Display the first page"),
 description = @Translation("Display the first page of the PDF file."),
 field_types = {"file"}
)

Hierarchy

class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
- class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
  - class \Drupal\Core\Field\PluginSettingsBase implements DependentPluginInterface, PluginSettingsInterface
    class \Drupal\Core\Field\FormatterBase implements FormatterInterface, ContainerFactoryPluginInterface
    class \Drupal\pdf\Plugin\Field\FieldFormatter\PdfThumbnail

Expanded class hierarchy of PdfThumbnail

File

src/Plugin/Field/FieldFormatter/PdfThumbnail.php, line 18

Namespace

Drupal\pdf\Plugin\Field\FieldFormatter

View source

class PdfThumbnail extends FormatterBase {
  public static function defaultSettings() {
    return [
      'scale' => 1,
      'width' => '',
      'height' => '',
    ] + parent::defaultSettings();
  }
  public function settingsForm(array $form, FormStateInterface $form_state) {
    $elements = parent::settingsForm($form, $form_state);
    $elements['scale'] = [
      '#type' => 'textfield',
      '#title' => t('Set the scale of PDF pages'),
      '#default_value' => $this
        ->getSetting('scale'),
    ];
    $elements['width'] = [
      '#type' => 'textfield',
      '#title' => 'Width',
      '#default_value' => $this
        ->getSetting('width'),
      '#description' => t('Width of the viewer. Ex: 250px or 100%'),
    ];
    $elements['height'] = [
      '#type' => 'textfield',
      '#title' => 'Height',
      '#default_value' => $this
        ->getSetting('height'),
      '#description' => t('Height of the viewer. Ex: 250px or 100%'),
    ];
    return $elements;
  }
  public function settingsSummary() {
    $summary = [];
    $scale = $this
      ->getSetting('scale');
    $width = $this
      ->getSetting('width');
    $height = $this
      ->getSetting('height');
    if (empty($scale) && empty($width) && empty($height)) {
      $summary[] = $this
        ->t('No settings');
    }
    else {
      $summary[] = t('Scale: @scale, Width: @width, Height: @height', [
        '@scale' => $scale,
        '@width' => $width,
        '@height' => $height,
      ]);
    }
    return $summary;
  }
  public function viewElements(FieldItemListInterface $items, $langcode) {
    $elements = [];
    foreach ($items as $delta => $item) {
      if ($item->entity
        ->getMimeType() == 'application/pdf') {
        $file_url = file_create_url($item->entity
          ->getFileUri());
        $html = [
          '#type' => 'html_tag',
          '#tag' => 'canvas',
          //'#value' => ,
          '#attributes' => [
            'class' => [
              'pdf-thumbnail',
              'pdf-canvas',
            ],
            'id' => [
              'pdf-thumbnail-' . $delta,
            ],
            'file' => $file_url,
            'scale' => $this
              ->getSetting('scale'),
            'style' => 'width:' . $this
              ->getSetting('width') . ';height:' . $this
              ->getSetting('height') . ';',
          ],
        ];
        $elements[$delta] = $html;
      }
      else {
        $elements[$delta] = [
          '#theme' => 'file_link',
          '#file' => $item->entity,
        ];
      }
    }
    $elements['#attached']['library'][] = 'pdf/drupal.pdf';
    $worker = file_create_url(base_path() . 'libraries/pdf.js/build/pdf.worker.js');
    $elements['#attached']['drupalSettings'] = [
      'pdf' => [
        'workerSrc' => $worker,
      ],
    ];
    return $elements;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property	An array of entity type IDs keyed by the property name of their storages.
DependencySerializationTrait::$_serviceIds	protected	property	An array of service IDs keyed by property name used for serialization.
DependencySerializationTrait::__sleep	public	function		1
DependencySerializationTrait::__wakeup	public	function		2
FormatterBase::$fieldDefinition	protected	property	The field definition.
FormatterBase::$label	protected	property	The label display setting.
FormatterBase::$settings	protected	property	The formatter settings. Overrides PluginSettingsBase::$settings
FormatterBase::$viewMode	protected	property	The view mode.
FormatterBase::create	public static	function	Creates an instance of the plugin. Overrides ContainerFactoryPluginInterface::create	11
FormatterBase::getFieldSetting	protected	function	Returns the value of a field setting.
FormatterBase::getFieldSettings	protected	function	Returns the array of field settings.
FormatterBase::isApplicable	public static	function	Returns if the formatter can be used for the provided field. Overrides FormatterInterface::isApplicable	14
FormatterBase::prepareView	public	function	Allows formatters to load information for field values being displayed. Overrides FormatterInterface::prepareView	2
FormatterBase::view	public	function	Builds a renderable array for a fully themed field. Overrides FormatterInterface::view	1
FormatterBase::__construct	public	function	Constructs a FormatterBase object. Overrides PluginBase::__construct	11
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PdfThumbnail::defaultSettings	public static	function	Defines the default settings for this plugin. Overrides PluginSettingsBase::defaultSettings
PdfThumbnail::settingsForm	public	function	Returns a form to configure settings for the formatter. Overrides FormatterBase::settingsForm
PdfThumbnail::settingsSummary	public	function	Returns a short summary for the current formatter settings. Overrides FormatterBase::settingsSummary
PdfThumbnail::viewElements	public	function	Builds a renderable array for a field value. Overrides FormatterInterface::viewElements
PluginBase::$configuration	protected	property	Configuration information passed into the plugin.	1
PluginBase::$pluginDefinition	protected	property	The plugin implementation definition.	1
PluginBase::$pluginId	protected	property	The plugin_id.
PluginBase::DERIVATIVE_SEPARATOR		constant	A string which is used to separate base plugin IDs from the derivative ID.
PluginBase::getBaseId	public	function	Gets the base_plugin_id of the plugin instance. Overrides DerivativeInspectionInterface::getBaseId
PluginBase::getDerivativeId	public	function	Gets the derivative_id of the plugin instance. Overrides DerivativeInspectionInterface::getDerivativeId
PluginBase::getPluginDefinition	public	function	Gets the definition of the plugin implementation. Overrides PluginInspectionInterface::getPluginDefinition	3
PluginBase::getPluginId	public	function	Gets the plugin_id of the plugin instance. Overrides PluginInspectionInterface::getPluginId
PluginBase::isConfigurable	public	function	Determines if the plugin is configurable.
PluginSettingsBase::$defaultSettingsMerged	protected	property	Whether default settings have been merged into the current $settings.
PluginSettingsBase::$thirdPartySettings	protected	property	The plugin settings injected by third party modules.
PluginSettingsBase::calculateDependencies	public	function	Calculates dependencies for the configured plugin. Overrides DependentPluginInterface::calculateDependencies	6
PluginSettingsBase::getSetting	public	function	Returns the value of a setting, or its default value if absent. Overrides PluginSettingsInterface::getSetting
PluginSettingsBase::getSettings	public	function	Returns the array of settings, including defaults for missing settings. Overrides PluginSettingsInterface::getSettings
PluginSettingsBase::getThirdPartyProviders	public	function	Gets the list of third parties that store information. Overrides ThirdPartySettingsInterface::getThirdPartyProviders
PluginSettingsBase::getThirdPartySetting	public	function	Gets the value of a third-party setting. Overrides ThirdPartySettingsInterface::getThirdPartySetting
PluginSettingsBase::getThirdPartySettings	public	function	Gets all third-party settings of a given module. Overrides ThirdPartySettingsInterface::getThirdPartySettings
PluginSettingsBase::mergeDefaults	protected	function	Merges default settings values into $settings.
PluginSettingsBase::onDependencyRemoval	public	function	Informs the plugin that some configuration it depends on will be deleted. Overrides PluginSettingsInterface::onDependencyRemoval	3
PluginSettingsBase::setSetting	public	function	Sets the value of a setting for the plugin. Overrides PluginSettingsInterface::setSetting
PluginSettingsBase::setSettings	public	function	Sets the settings for the plugin. Overrides PluginSettingsInterface::setSettings
PluginSettingsBase::setThirdPartySetting	public	function	Sets the value of a third-party setting. Overrides ThirdPartySettingsInterface::setThirdPartySetting
PluginSettingsBase::unsetThirdPartySetting	public	function	Unsets a third-party setting. Overrides ThirdPartySettingsInterface::unsetThirdPartySetting
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	1
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.

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class PdfThumbnail in PDF 8

Plugin annotation

Hierarchy

File

Namespace

Members

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