class Crop in ImageMagick 8.3

Defines imagemagick Crop operation.

Plugin annotation

@ImageToolkitOperation(
  id = "imagemagick_crop",
  toolkit = "imagemagick",
  operation = "crop",
  label = @Translation("Crop"),
  description = @Translation("Crops an image to a rectangle specified by the given dimensions.")
)

Hierarchy

• class \Drupal\Component\Plugin\PluginBase implements DerivativeInspectionInterface, PluginInspectionInterface
  • class \Drupal\Core\Plugin\PluginBase uses DependencySerializationTrait, MessengerTrait, StringTranslationTrait
    • class \Drupal\Core\ImageToolkit\ImageToolkitOperationBase implements ImageToolkitOperationInterface
      • class \Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick\ImagemagickImageToolkitOperationBase
        • class \Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick\Crop

File

src/Plugin/ImageToolkit/Operation/imagemagick/Crop.php, line 16

Namespace

Drupal\imagemagick\Plugin\ImageToolkit\Operation\imagemagick

class Crop extends ImagemagickImageToolkitOperationBase {

  /**
   * {@inheritdoc}
   */
  protected function arguments() {
    return [
      'x' => [
        'description' => 'The starting x offset at which to start the crop, in pixels',
      ],
      'y' => [
        'description' => 'The starting y offset at which to start the crop, in pixels',
      ],
      'width' => [
        'description' => 'The width of the cropped area, in pixels',
        'required' => FALSE,
        'default' => NULL,
      ],
      'height' => [
        'description' => 'The height of the cropped area, in pixels',
        'required' => FALSE,
        'default' => NULL,
      ],
    ];
  }

  /**
   * {@inheritdoc}
   */
  protected function validateArguments(array $arguments) {

    // Fail if no dimensions available for current image.
    if (is_null($this
      ->getToolkit()
      ->getWidth()) || is_null($this
      ->getToolkit()
      ->getHeight())) {
      throw new \RuntimeException("No image dimensions available for the image '{$this->getPluginDefinition()['operation']}' operation");
    }

    // Assure at least one dimension.
    if (empty($arguments['width']) && empty($arguments['height'])) {
      throw new \InvalidArgumentException("At least one dimension ('width' or 'height') must be provided to the image 'crop' operation");
    }

    // Preserve aspect.
    $aspect = $this
      ->getToolkit()
      ->getHeight() / $this
      ->getToolkit()
      ->getWidth();
    $arguments['height'] = empty($arguments['height']) ? $arguments['width'] * $aspect : $arguments['height'];
    $arguments['width'] = empty($arguments['width']) ? $arguments['height'] / $aspect : $arguments['width'];

    // Assure integers for all arguments.
    foreach ([
      'x',
      'y',
      'width',
      'height',
    ] as $key) {
      $arguments[$key] = (int) round($arguments[$key]);
    }

    // Fail when width or height are 0 or negative.
    if ($arguments['width'] <= 0) {
      throw new \InvalidArgumentException("Invalid width ('{$arguments['width']}') specified for the image 'crop' operation");
    }
    if ($arguments['height'] <= 0) {
      throw new \InvalidArgumentException("Invalid height ('{$arguments['height']}') specified for the image 'crop' operation");
    }
    return $arguments;
  }

  /**
   * {@inheritdoc}
   */
  protected function execute(array $arguments) {

    // Even though the crop effect in Drupal core does not allow for negative
    // offsets, ImageMagick supports them. Also note: if $x and $y are set to
    // NULL then crop will create tiled images so we convert these to ints.
    $this
      ->addArgument(sprintf('-crop %dx%d%+d%+d +repage', $arguments['width'], $arguments['height'], $arguments['x'], $arguments['y']));
    $this
      ->getToolkit()
      ->setWidth($arguments['width'])
      ->setHeight($arguments['height']);
    return TRUE;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Crop::arguments	protected	function	Returns the definition of the operation arguments. Overrides ImageToolkitOperationBase::arguments
Crop::execute	protected	function	Performs the actual manipulation on the image. Overrides ImageToolkitOperationBase::execute
Crop::validateArguments	protected	function	Validates the arguments. Overrides ImageToolkitOperationBase::validateArguments
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
ImagemagickImageToolkitOperationBase::addArgument	protected	function	Helper to add a command line argument.
ImagemagickImageToolkitOperationBase::escapeArgument	protected	function	Helper to escape a command line argument.
ImagemagickImageToolkitOperationBase::getToolkit	protected	function	Returns the image toolkit instance for this operation. Overrides ImageToolkitOperationBase::getToolkit
ImageToolkitOperationBase::$logger	protected	property	A logger instance.
ImageToolkitOperationBase::$toolkit	protected	property	The image toolkit.
ImageToolkitOperationBase::apply	final public	function	Applies a toolkit specific operation to an image. Overrides ImageToolkitOperationInterface::apply
ImageToolkitOperationBase::prepareArguments	protected	function	Checks if required arguments are passed in and adds defaults for non passed in optional arguments.
ImageToolkitOperationBase::__construct	public	function	Constructs an image toolkit operation plugin. Overrides PluginBase::__construct
MessengerTrait::$messenger	protected	property	The messenger.	29
MessengerTrait::messenger	public	function	Gets the messenger.	29
MessengerTrait::setMessenger	public	function	Sets the messenger.
PluginBase::$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.
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.