Utility to simulate frontend enviroment in backend enviroment.
/**
* used to attach srcset variants of a given image to the specified tag
*
* @param \TYPO3\CMS\Fluid\Core\ViewHelper\TagBuilder $tag the tag to add the srcset as argument
* @param string $src image path to render srcsets for
* @return array
*/
public function addSourceSet($tag, $src)
{
$srcsets = $this->getSourceSetWidths();
if ('BE' === TYPO3_MODE) {
FrontendSimulationUtility::simulateFrontendEnvironment();
}
$format = $this->arguments['format'];
$quality = $this->arguments['quality'];
$treatIdAsReference = (bool) $this->arguments['treatIdAsReference'];
if (true === $treatIdAsReference) {
$src = $this->arguments['src'];
}
$imageSources = [];
$srcsetVariants = [];
foreach ($srcsets as $key => $width) {
$srcsetVariant = $this->getImgResource($src, $width, $format, $quality, $treatIdAsReference);
$srcsetVariantSrc = rawurldecode($srcsetVariant[3]);
$srcsetVariantSrc = $this->preprocessSourceUri(GeneralUtility::rawUrlEncodeFP($srcsetVariantSrc));
$imageSources[$srcsetVariant[0]] = ['src' => $srcsetVariantSrc, 'width' => $srcsetVariant[0], 'height' => $srcsetVariant[1]];
$srcsetVariants[$srcsetVariant[0]] = $srcsetVariantSrc . ' ' . $srcsetVariant[0] . 'w';
}
$tag->addAttribute('srcset', implode(',', $srcsetVariants));
if ('BE' === TYPO3_MODE) {
FrontendSimulationUtility::resetFrontendEnvironment();
}
return $imageSources;
}
/**
* @param string $string
* @param string $case
* @return string
*/
public function render($string = null, $case = null)
{
if (null === $string) {
$string = $this->renderChildren();
}
if ('BE' === TYPO3_MODE) {
$tsfeBackup = FrontendSimulationUtility::simulateFrontendEnvironment();
}
$charset = $GLOBALS['TSFE']->renderCharset;
switch ($case) {
case self::CASE_LOWER:
$string = $GLOBALS['TSFE']->csConvObj->conv_case($charset, $string, 'toLower');
break;
case self::CASE_UPPER:
$string = $GLOBALS['TSFE']->csConvObj->conv_case($charset, $string, 'toUpper');
break;
case self::CASE_UCWORDS:
$string = ucwords($string);
break;
case self::CASE_UCFIRST:
$string = $GLOBALS['TSFE']->csConvObj->convCaseFirst($charset, $string, 'toUpper');
break;
case self::CASE_LCFIRST:
$string = $GLOBALS['TSFE']->csConvObj->convCaseFirst($charset, $string, 'toLower');
break;
case self::CASE_CAMELCASE:
$string = GeneralUtility::underscoredToUpperCamelCase($string);
break;
case self::CASE_LOWERCAMELCASE:
$string = GeneralUtility::underscoredToLowerCamelCase($string);
break;
case self::CASE_UNDERSCORED:
$string = GeneralUtility::camelCaseToLowerCaseUnderscored($string);
break;
default:
break;
}
if ('BE' === TYPO3_MODE) {
FrontendSimulationUtility::resetFrontendEnvironment($tsfeBackup);
}
return $string;
}
/**
* Render method
*
* @return string
*/
public function render()
{
$src = $this->viewHelperVariableContainer->get(self::SCOPE, self::SCOPE_VARIABLE_SRC);
if ('BE' === TYPO3_MODE) {
$tsfeBackup = FrontendSimulationUtility::simulateFrontendEnvironment();
}
$setup = array('width' => $this->arguments['width'], 'height' => $this->arguments['height'], 'minW' => $this->arguments['minW'], 'minH' => $this->arguments['minH'], 'maxW' => $this->arguments['maxW'], 'maxH' => $this->arguments['maxH']);
$quality = $this->arguments['quality'];
$format = $this->arguments['format'];
if (FALSE === empty($format)) {
$setup['ext'] = $format;
}
if (0 < intval($quality)) {
$quality = MathUtility::forceIntegerInRange($quality, 10, 100, 75);
$setup['params'] .= ' -quality ' . $quality;
}
if ('BE' === TYPO3_MODE && '../' === substr($src, 0, 3)) {
$src = substr($src, 3);
}
$result = $this->contentObject->getImgResource($src, $setup);
if ('BE' === TYPO3_MODE) {
FrontendSimulationUtility::resetFrontendEnvironment($tsfeBackup);
}
$src = $this->preprocessSourceUri(rawurldecode($result[3]));
if (NULL === $this->arguments['media']) {
$this->viewHelperVariableContainer->addOrUpdate(self::SCOPE, self::SCOPE_VARIABLE_DEFAULT_SOURCE, $src);
} else {
$this->tag->addAttribute('media', $this->arguments['media']);
}
$this->tag->addAttribute('srcset', $src);
return $this->tag->render();
}