/**
* {@inheritDocs}
*
* Validate callback for the focal point field.
*/
public static function validateFocalPoint($element, FormStateInterface $form_state)
{
$field_name = array_pop($element['#parents']);
$focal_point_value = $form_state->getValue($field_name);
if (!is_null($focal_point_value) && !FocalPoint::validate($focal_point_value)) {
\Drupal::formBuilder()->setError($element, $form_state, t('The !title field should be in the form "leftoffset,topoffset" where offsets are in percents. Ex: 25,75.', array('!title' => $element['#title'])));
}
}
/**
* {@inheritdoc}
*/
public function applyEffect(ImageInterface $image)
{
// Next, attempt to crop the image.
$focal_point = FocalPoint::getFromURI($image->getSource());
$crop_data = self::calculateCropData($focal_point, $image->getWidth(), $image->getHeight(), $this->configuration['width'], $this->configuration['height']);
if (!$image->crop($crop_data['x'], $crop_data['y'], $crop_data['width'], $crop_data['height'])) {
$this->logger->error('Focal point scale and crop failed while scaling and cropping using the %toolkit toolkit on %path (%mimetype, %dimensions)', array('%toolkit' => $image->getToolkitId(), '%path' => $image->getSource(), '%mimetype' => $image->getMimeType(), '%dimensions' => $image->getWidth() . 'x' . $image->getHeight()));
return FALSE;
}
return TRUE;
}
/**
* Compile the necessary data for the image crop effect.
*
* @param string $focal_point
* @param int $image_width
* @param int $image_height
* @param int $crop_width
* @param int $crop_height
*
* @return array|bool
* An array containing the following keys:
* - width
* - height
* - x
* - y
*/
public static function calculateCropData($focal_point, $image_width, $image_height, $crop_width, $crop_height)
{
$crop_data = array();
$parsed_focal_point = FocalPoint::parse($focal_point);
// Get the pixel location of the focal point for the current image taking
// the image boundaries into account.
$crop_data['width'] = (int) $crop_width;
$crop_data['height'] = (int) $crop_height;
$crop_data['x'] = self::calculateAnchor($image_width, $crop_width, $parsed_focal_point['x-offset']);
$crop_data['y'] = self::calculateAnchor($image_height, $crop_height, $parsed_focal_point['y-offset']);
return $crop_data;
}
/**
* Tests the validate() method.
*
* @dataProvider providerValidateFocalPoint
*/
public function testFocalPointValidate($focal_point, $expected)
{
$this->assertSame($expected, FocalPoint::validate($focal_point));
}
