Craft\ImageResizerController::actionCropElementAction PHP Méthode

    public function actionCropElementAction()
    {
        $this->requireAjaxRequest();
        $assetId = craft()->request->getRequiredPost('assetId');
        $asset = craft()->assets->getFileById($assetId);
        $constraint = 500;
        if ($asset) {
            // Never scale up the images, so make the scaling factor always <= 1
            $factor = min($constraint / $asset->width, $constraint / $asset->height, 1);
            $imageUrl = $asset->url . '?' . uniqid();
            $width = round($asset->width * $factor);
            $height = round($asset->height * $factor);
            $fileName = $asset->title;
            $html = '<img src="' . $imageUrl . '" width="' . $width . '" height="' . $height . '" data-factor="' . $factor . '" data-constraint="' . $constraint . '"/>';
            $this->returnJson(array('html' => $html));
        }
    }