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<?php |
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/** |
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* Helper class for resizing images, returning the correct URL to the image etc |
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*/ |
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class MetaSliderImageHelper |
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{ |
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private $smart_crop = 'false'; |
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private $container_width; // slideshow width |
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private $container_height; // slideshow height |
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private $id; // slide/attachment ID |
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private $url; |
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private $path; // path to attachment on server |
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private $use_image_editor; |
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/** |
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* Constructor |
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* |
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* @param integer $slide_id |
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* @param integer $width - required width of image |
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* @param integer $height - required height of image |
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* @param string $smart_crop |
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* @param bool $use_image_editor |
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*/ |
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public function __construct($slide_id, $width, $height, $smart_crop, $use_image_editor = true) |
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{ |
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$upload_dir = wp_upload_dir(); |
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$this->id = $slide_id; |
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$this->url = $upload_dir['baseurl'] . '/' . get_post_meta($slide_id, '_wp_attached_file', true); |
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$this->path = get_attached_file($slide_id); |
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$this->container_width = $width; |
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$this->container_height = $height; |
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$this->smart_crop = $smart_crop; |
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$this->use_image_editor = $use_image_editor; |
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} |
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/** |
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* Return the crop dimensions. |
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* |
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* Smart Crop: If the image is smaller than the container width or height, then return |
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* dimensions that respect the container size ratio. This ensures image displays in a |
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* sane manner in responsive sliders |
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* |
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* @param integer $image_width |
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* @param integer $image_height |
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* @return array image dimensions |
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*/ |
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private function get_crop_dimensions($image_width, $image_height) |
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{ |
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if ('false' === $this->smart_crop) { |
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return array('width' => (int)$this->container_width, 'height' => (int)$this->container_height); |
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} |
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$container_width = $this->container_width; |
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$container_height = $this->container_height; |
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/** |
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* Slideshow Width == Slide Width |
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*/ |
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if ($image_width == $container_width && $image_height == $container_height) { |
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$new_slide_width = $container_width; |
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$new_slide_height = $container_height; |
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} |
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if ($image_width == $container_width && $image_height < $container_height) { |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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} |
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if ($image_width == $container_width && $image_height > $container_height) { |
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$new_slide_width = $container_width; |
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$new_slide_height = $container_height; |
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} |
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/** |
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* Slideshow Width < Slide Width |
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*/ |
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if ($image_width < $container_width && $image_height == $container_height) { |
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$new_slide_width = $image_width; |
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$new_slide_height = $image_height / ($container_width / $image_width); |
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} |
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/** |
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* Slide is smaller than slidehow - both width and height |
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*/ |
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if ($image_width < $container_width && $image_height < $container_height) { |
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if ($container_width > $container_height) { |
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// wide |
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if ($image_width > $image_height) { |
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// wide |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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if ($new_slide_width > $image_width) { |
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$new_slide_width = $image_width; |
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$new_slide_height = $container_height / ($container_width / $image_width); |
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} |
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} else { |
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// tall |
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$new_slide_width = $image_width; |
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$new_slide_height = $container_height / ($container_width / $image_width); |
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if ($new_slide_height > $image_height) { |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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} |
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} |
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} else { |
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// tall |
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if ($image_width > $image_height) { |
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// wide |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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if ($new_slide_width > $image_width) { |
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$new_slide_width = $image_width; |
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$new_slide_height = $container_height / ($container_width / $image_width); |
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} |
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} else { |
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// tall |
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$new_slide_width = $image_width; |
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$new_slide_height = $container_height / ($container_width / $image_width); |
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if ($new_slide_height > $image_height) { |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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} |
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} |
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} |
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} |
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if ($image_width < $container_width && $image_height > $container_height) { |
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$new_slide_width = $image_width; |
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$new_slide_height = $container_height / ($container_width / $image_width); |
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} |
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/** |
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* Slideshow Width > Slide Width |
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*/ |
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if ($image_width > $container_width && $image_height == $container_height) { |
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$new_slide_width = $container_width; |
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$new_slide_height = $container_height; |
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} |
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if ($image_width > $container_width && $image_height < $container_height) { |
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$new_slide_height = $image_height; |
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$new_slide_width = $container_width / ($container_height / $image_height); |
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} |
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if ($image_width > $container_width && $image_height > $container_height) { |
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$new_slide_width = $container_width; |
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$new_slide_height = $container_height; |
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} |
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return array('width' => floor($new_slide_width), 'height' => floor($new_slide_height)); |
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} |
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/** |
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* Return the image URL, crop the image to the correct dimensions if required |
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* |
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* @return string resized image URL |
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*/ |
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public function get_image_url() |
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{ |
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// Get the image file path |
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if (!strlen($this->path)) { |
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return $this->url; |
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} |
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// if the file exists, just return it without going any further |
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$dest_file_name = $this->get_destination_file_name(array( |
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'width' => $this->container_width, |
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'height' => $this->container_height |
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)); |
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if (file_exists($dest_file_name)) { |
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return str_replace(basename($this->url), basename($dest_file_name), $this->url); |
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} |
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// file doesn't exist, detect required size |
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$orig_size = $this->get_original_image_dimensions(); |
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// bail out if we can't find the image dimensions |
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if (false == $orig_size) { |
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return $this->url; |
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} |
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// required size |
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$dest_size = $this->get_crop_dimensions($orig_size['width'], $orig_size['height']); |
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// check if a resize is needed |
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if ($orig_size['width'] == $dest_size['width'] && $orig_size['height'] == $dest_size['height']) { |
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return $this->url; |
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} |
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$dest_file_name = $this->get_destination_file_name($dest_size); |
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if (file_exists($dest_file_name)) { |
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// good. no need for resize, just return the URL |
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$dest_url = str_replace(basename($this->url), basename($dest_file_name), $this->url); |
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} elseif ($this->use_image_editor) { |
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// resize, assuming we're allowed to use the image editor |
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$dest_url = $this->resize_image($orig_size, $dest_size, $dest_file_name); |
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} else { |
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// fall back to the full URL |
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$dest_url = $this->url; |
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} |
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$dest_url = apply_filters('metaslider_resized_image_url', $dest_url, $this->url); |
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return $dest_url; |
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} |
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/** |
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* Get the image dimensions for the original image. |
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* |
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* Fall back to using the WP_Image_Editor if the size is not stored in metadata |
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* |
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* @return array |
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*/ |
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private function get_original_image_dimensions() |
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{ |
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$size = array(); |
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// try and get the image size from metadata |
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$meta = wp_get_attachment_metadata($this->id); |
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if (isset($meta['width'], $meta['height'])) { |
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return $meta; |
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} |
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if ($this->use_image_editor) { |
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// get the size from the image itself |
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$image = wp_get_image_editor($this->path); |
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if (!is_wp_error($image)) { |
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$size = $image->get_size(); |
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return $size; |
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} |
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} |
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return false; |
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} |
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/** |
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* Return the file name for the required image size |
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* |
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* @param array $dest_size image dimensions (width/height) in pixels |
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* @return string |
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*/ |
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private function get_destination_file_name($dest_size) |
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{ |
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$info = pathinfo($this->path); |
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$dir = $info['dirname']; |
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$ext = $info['extension']; |
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$name = wp_basename($this->path, ".$ext"); |
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$dest_file_name = "{$dir}/{$name}-{$dest_size['width']}x{$dest_size['height']}.{$ext}"; |
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return $dest_file_name; |
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} |
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/** |
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* Use WP_Image_Editor to create a resized image and return the URL for that image |
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* |
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* @param array $orig_size |
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* @param array $dest_size |
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* @param $dest_file_name |
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* @return string |
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*/ |
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private function resize_image($orig_size, $dest_size, $dest_file_name) |
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{ |
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// load image |
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$image = wp_get_image_editor($this->path); |
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// editor will return an error if the path is invalid |
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if (is_wp_error($image)) { |
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if (is_admin()) { |
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echo '<div id="message" class="error">'; |
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echo '<p><strong>ERROR</strong> ' . $image->get_error_message() . " Check <a href='http://codex.wordpress.org/Changing_File_Permissions' target='_blank'>file permissions</a></p>"; |
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echo "<button class='toggle'>Show Details</button>"; |
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echo "<div class='message' style='display: none;'><br >Slide ID: {$this->id}<pre>"; |
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var_dump($image); |
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echo '</pre></div>'; |
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echo '</div>'; |
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} |
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return $this->url; |
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} |
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$dims = image_resize_dimensions($orig_size['width'], $orig_size['height'], $dest_size['width'], $dest_size['height'], true); |
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if ($dims) { |
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list($dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) = $dims; |
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$image->crop($src_x, $src_y, $src_w, $src_h, $dst_w, $dst_h); |
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} |
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$saved = $image->save($dest_file_name); |
|
301
|
|
|
|
|
302
|
|
|
if (is_wp_error($saved)) { |
|
303
|
|
|
return $this->url; |
|
304
|
|
|
} |
|
305
|
|
|
|
|
306
|
|
|
// Record the new size so that the file is correctly removed when the media file is deleted. |
|
307
|
|
|
$backup_sizes = get_post_meta($this->id, '_wp_attachment_backup_sizes', true); |
|
|
|
|
|
|
308
|
|
|
|
|
309
|
|
|
if (!is_array($backup_sizes)) { |
|
310
|
|
|
$backup_sizes = array(); |
|
311
|
|
|
} |
|
312
|
|
|
|
|
313
|
|
|
$backup_sizes["resized-{$dest_size['width']}x{$dest_size['height']}"] = $saved; |
|
314
|
|
|
update_post_meta($this->id, '_wp_attachment_backup_sizes', $backup_sizes); |
|
|
|
|
|
|
315
|
|
|
|
|
316
|
|
|
$url = str_replace(basename($this->url), basename($saved['path']), $this->url); |
|
317
|
|
|
|
|
318
|
|
|
return $url; |
|
319
|
|
|
} |
|
320
|
|
|
} |
|
321
|
|
|
|
mambax7 /
extgallery
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.