*
* Output in frontend::
*
* 
*
* or in backend::
*
* 
*
* Image Object
* ------------
*
* ::
*
*
*
* Output::
*
* 
*
* Inline notation
* ---------------
*
* ::
*
* {f:image(src: 'EXT:viewhelpertest/Resources/Public/typo3_logo.png', alt: 'alt text', minWidth: 30, maxWidth: 40)}
*
* Output::
*
* 
*
* Depending on your TYPO3s encryption key.
*
* Other resource type (e.g. PDF)
* ------------------------------
*
* ::
*
*
*
* If your graphics processing library is set up correctly then it will output a thumbnail of the first page of your PDF document:
* ``
``
*
* Non-existent image
* ------------------
*
* ::
*
*
*
* ``Could not get image resource for "NonExistingImage.png".``
*/
class ImageViewHelper extends AbstractTagBasedViewHelper
{
/**
* @var string
*/
protected $tagName = 'img';
/**
* @var \TYPO3\CMS\Extbase\Service\ImageService
*/
protected $imageService;
/**
* @param \TYPO3\CMS\Extbase\Service\ImageService $imageService
*/
public function injectImageService(\TYPO3\CMS\Extbase\Service\ImageService $imageService)
{
$this->imageService = $imageService;
}
/**
* Initialize arguments.
*/
public function initializeArguments()
{
parent::initializeArguments();
$this->registerUniversalTagAttributes();
$this->registerTagAttribute('alt', 'string', 'Specifies an alternate text for an image', false);
$this->registerTagAttribute('ismap', 'string', 'Specifies an image as a server-side image-map. Rarely used. Look at usemap instead', false);
$this->registerTagAttribute('longdesc', 'string', 'Specifies the URL to a document that contains a long description of an image', false);
$this->registerTagAttribute('usemap', 'string', 'Specifies an image as a client-side image-map', false);
$this->registerArgument('src', 'string', 'a path to a file, a combined FAL identifier or an uid (int). If $treatIdAsReference is set, the integer is considered the uid of the sys_file_reference record. If you already got a FAL object, consider using the $image parameter instead');
$this->registerArgument('treatIdAsReference', 'bool', 'given src argument is a sys_file_reference record');
$this->registerArgument('image', 'object', 'a FAL object');
$this->registerArgument('crop', 'string|bool', 'overrule cropping of image (setting to FALSE disables the cropping set in FileReference)');
$this->registerArgument('cropVariant', 'string', 'select a cropping variant, in case multiple croppings have been specified or stored in FileReference', false, 'default');
$this->registerArgument('width', 'string', 'width of the image. This can be a numeric value representing the fixed width of the image in pixels. But you can also perform simple calculations by adding "m" or "c" to the value. See imgResource.width for possible options.');
$this->registerArgument('height', 'string', 'height of the image. This can be a numeric value representing the fixed height of the image in pixels. But you can also perform simple calculations by adding "m" or "c" to the value. See imgResource.width for possible options.');
$this->registerArgument('minWidth', 'int', 'minimum width of the image');
$this->registerArgument('minHeight', 'int', 'minimum height of the image');
$this->registerArgument('maxWidth', 'int', 'maximum width of the image');
$this->registerArgument('maxHeight', 'int', 'maximum height of the image');
$this->registerArgument('absolute', 'bool', 'Force absolute URL', false, false);
}
/**
* Resizes a given image (if required) and renders the respective img tag
*
* @see https://docs.typo3.org/typo3cms/TyposcriptReference/ContentObjects/Image/
*
* @throws Exception
* @return string Rendered tag
*/
public function render()
{
if (($this->arguments['src'] === null && $this->arguments['image'] === null) || ($this->arguments['src'] !== null && $this->arguments['image'] !== null)) {
throw new Exception('You must either specify a string src or a File object.', 1382284106);
}
try {
$image = $this->imageService->getImage($this->arguments['src'], $this->arguments['image'], $this->arguments['treatIdAsReference']);
$cropString = $this->arguments['crop'];
if ($cropString === null && $image->hasProperty('crop') && $image->getProperty('crop')) {
$cropString = $image->getProperty('crop');
}
$cropVariantCollection = CropVariantCollection::create((string)$cropString);
$cropVariant = $this->arguments['cropVariant'] ?: 'default';
$cropArea = $cropVariantCollection->getCropArea($cropVariant);
$processingInstructions = [
'width' => $this->arguments['width'],
'height' => $this->arguments['height'],
'minWidth' => $this->arguments['minWidth'],
'minHeight' => $this->arguments['minHeight'],
'maxWidth' => $this->arguments['maxWidth'],
'maxHeight' => $this->arguments['maxHeight'],
'crop' => $cropArea->isEmpty() ? null : $cropArea->makeAbsoluteBasedOnFile($image),
];
$processedImage = $this->imageService->applyProcessingInstructions($image, $processingInstructions);
$imageUri = $this->imageService->getImageUri($processedImage, $this->arguments['absolute']);
if (!$this->tag->hasAttribute('data-focus-area')) {
$focusArea = $cropVariantCollection->getFocusArea($cropVariant);
if (!$focusArea->isEmpty()) {
$this->tag->addAttribute('data-focus-area', $focusArea->makeAbsoluteBasedOnFile($image));
}
}
$this->tag->addAttribute('src', $imageUri);
$this->tag->addAttribute('width', $processedImage->getProperty('width'));
$this->tag->addAttribute('height', $processedImage->getProperty('height'));
$alt = $image->getProperty('alternative');
$title = $image->getProperty('title');
// The alt-attribute is mandatory to have valid html-code, therefore add it even if it is empty
if (empty($this->arguments['alt'])) {
$this->tag->addAttribute('alt', $alt);
}
if (empty($this->arguments['title']) && $title) {
$this->tag->addAttribute('title', $title);
}
} catch (ResourceDoesNotExistException $e) {
// thrown if file does not exist
throw new Exception($e->getMessage(), 1509741911, $e);
} catch (\UnexpectedValueException $e) {
// thrown if a file has been replaced with a folder
throw new Exception($e->getMessage(), 1509741912, $e);
} catch (\RuntimeException $e) {
// RuntimeException thrown if a file is outside of a storage
throw new Exception($e->getMessage(), 1509741913, $e);
} catch (\InvalidArgumentException $e) {
// thrown if file storage does not exist
throw new Exception($e->getMessage(), 1509741914, $e);
}
return $this->tag->render();
}
}