/**
* Retrieves the preview from the cache and resizes it if necessary
*
* @param int $fileId fileId of the original image
* @param string $cached the path to the cached preview
*/
private function getCachedPreview($fileId, $cached)
{
$stream = $this->userView->fopen($cached, 'r');
$this->preview = null;
if ($stream) {
$image = new \OC_Image();
$image->loadFromFileHandle($stream);
$this->preview = $image->valid() ? $image : null;
if (!is_null($this->preview)) {
// Size of the preview we calculated
$maxX = $this->previewWidth;
$maxY = $this->previewHeight;
// Size of the preview we retrieved from the cache
$previewX = (int) $this->preview->width();
$previewY = (int) $this->preview->height();
// We don't have an exact match
if ($previewX !== $maxX || $previewY !== $maxY) {
$this->resizeAndStore($fileId);
}
}
fclose($stream);
}
}
/**
* return a preview of a file
* @return \OC_Image
*/
public function getPreview()
{
if (!is_null($this->preview) && $this->preview->valid()) {
return $this->preview;
}
$this->preview = null;
$file = $this->getFile();
$maxX = $this->getMaxX();
$maxY = $this->getMaxY();
$scalingUp = $this->getScalingUp();
$fileInfo = $this->getFileInfo($file);
if ($fileInfo === null || $fileInfo === false) {
return new \OC_Image();
}
$fileId = $fileInfo->getId();
$cached = $this->isCached($fileId);
if ($cached) {
$stream = $this->userView->fopen($cached, 'r');
$this->preview = null;
if ($stream) {
$image = new \OC_Image();
$image->loadFromFileHandle($stream);
$this->preview = $image->valid() ? $image : null;
$this->resizeAndCrop();
fclose($stream);
}
}
if (is_null($this->preview)) {
$preview = null;
foreach (self::$providers as $supportedMimeType => $provider) {
if (!preg_match($supportedMimeType, $this->mimeType)) {
continue;
}
\OC_Log::write('core', 'Generating preview for "' . $file . '" with "' . get_class($provider) . '"', \OC_Log::DEBUG);
/** @var $provider Provider */
$preview = $provider->getThumbnail($file, $maxX, $maxY, $scalingUp, $this->fileView);
if (!$preview instanceof \OC_Image) {
continue;
}
$this->preview = $preview;
$this->resizeAndCrop();
$previewPath = $this->getPreviewPath($fileId);
$cachePath = $this->buildCachePath($fileId);
if ($this->userView->is_dir($this->getThumbnailsFolder() . '/') === false) {
$this->userView->mkdir($this->getThumbnailsFolder() . '/');
}
if ($this->userView->is_dir($previewPath) === false) {
$this->userView->mkdir($previewPath);
}
$this->userView->file_put_contents($cachePath, $preview->data());
break;
}
}
if (is_null($this->preview)) {
$this->preview = new \OC_Image();
}
return $this->preview;
}
/**
* Retrieves the preview from the cache and resizes it if necessary
*
* @param int $fileId fileId of the original image
* @param string $cached the path to the cached preview
*/
private function getCachedPreview($fileId, $cached)
{
$stream = $this->userView->fopen($cached, 'r');
$this->preview = null;
if ($stream) {
$image = new \OC_Image();
$image->loadFromFileHandle($stream);
$this->preview = $image->valid() ? $image : null;
$maxX = (int) $this->getMaxX();
$maxY = (int) $this->getMaxY();
$previewX = (int) $this->preview->width();
$previewY = (int) $this->preview->height();
if ($previewX !== $maxX && $previewY !== $maxY) {
$this->resizeAndStore($fileId);
}
fclose($stream);
}
}
