Forked from jerbob92/ImageRenderExampleBlockResponsive.php
Created
July 12, 2016 15:42
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Render responsive image into a block Drupal 8 Example
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<?php | |
/** | |
* @file | |
* Contains Drupal\mymodule\Plugin\Block\ImageRenderExampleBlockResponsive. | |
*/ | |
namespace Drupal\mymodule\Plugin\Block; | |
use Drupal\Core\Block\BlockBase; | |
use Drupal\file\Entity\File; | |
/** | |
* Provides a 'ImageRenderExampleBlockResponsive' block. | |
* | |
* @Block( | |
* id = "mymodule_imagerenderexampleblockresponsive", | |
* admin_label = @Translation("MyModule Image Render Example Responsive"), | |
* ) | |
*/ | |
class ImageRenderExampleBlockResponsive extends BlockBase { | |
/** | |
* {@inheritdoc} | |
*/ | |
public function build() { | |
// Load file with file id 1. | |
$file = File::load(1); | |
if ($file) { | |
$variables = array( | |
'responsive_image_style_id' => 'responsive_thumbnail', | |
'uri' => $file->getFileUri(), | |
); | |
// The image.factory service will check if our image is valid. | |
$image = \Drupal::service('image.factory')->get($file->getFileUri()); | |
if ($image->isValid()) { | |
$variables['width'] = $image->getWidth(); | |
$variables['height'] = $image->getHeight(); | |
} | |
else { | |
$variables['width'] = $variables['height'] = NULL; | |
} | |
$logo_build = [ | |
'#theme' => 'responsive_image', | |
'#width' => $variables['width'], | |
'#height' => $variables['height'], | |
'#responsive_image_style_id' => $variables['responsive_image_style_id'], | |
'#uri' => $variables['uri'], | |
]; | |
// Add the file entity to the cache dependencies. | |
// This will clear our cache when this entity updates. | |
$renderer = \Drupal::service('renderer'); | |
$renderer->addCacheableDependency($logo_build, $file); | |
// Return the render array as block content. | |
return [ | |
'logo' => $logo_build, | |
]; | |
} else { | |
// Image not found, return empty block. | |
return []; | |
} | |
} | |
} |
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