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class Crop in Drupal 8

Same name and namespace in other branches
  1. 9 core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php \Drupal\system\Plugin\ImageToolkit\Operation\gd\Crop

Defines GD2 Crop operation.

Plugin annotation


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

Hierarchy

Expanded class hierarchy of Crop

3 string references to 'Crop'
ImageTest::testCrop in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::crop().
ImageTest::testCropHeight in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::crop().
ImageTest::testCropWidth in core/tests/Drupal/Tests/Core/Image/ImageTest.php
Tests \Drupal\Core\Image\Image::crop().

File

core/modules/system/src/Plugin/ImageToolkit/Operation/gd/Crop.php, line 16

Namespace

Drupal\system\Plugin\ImageToolkit\Operation\gd
View source 
class Crop extends GDImageToolkitOperationBase {

  /**
   * {@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) {

    // 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) {

    // Create a new resource of the required dimensions, and copy and resize
    // the original resource on it with resampling. Destroy the original
    // resource upon success.
    $original_resource = $this
      ->getToolkit()
      ->getResource();
    $data = [
      'width' => $arguments['width'],
      'height' => $arguments['height'],
      'extension' => image_type_to_extension($this
        ->getToolkit()
        ->getType(), FALSE),
      'transparent_color' => $this
        ->getToolkit()
        ->getTransparentColor(),
      'is_temp' => TRUE,
    ];
    if ($this
      ->getToolkit()
      ->apply('create_new', $data)) {
      if (imagecopyresampled($this
        ->getToolkit()
        ->getResource(), $original_resource, 0, 0, $arguments['x'], $arguments['y'], $arguments['width'], $arguments['height'], $arguments['width'], $arguments['height'])) {
        imagedestroy($original_resource);
        return TRUE;
      }
      else {

        // In case of failure, destroy the temporary resource and restore
        // the original one.
        imagedestroy($this
          ->getToolkit()
          ->getResource());
        $this
          ->getToolkit()
          ->setResource($original_resource);
      }
    }
    return FALSE;
  }

}

Members

Namesort descending 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
GDImageToolkitOperationBase::getToolkit protected function The correctly typed image toolkit for GD operations. 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.