996 lines
24 KiB
PHP
996 lines
24 KiB
PHP
<?php
|
|
/**
|
|
* Copyright (c) 2013 Frank Karlitschek frank@owncloud.org
|
|
* Copyright (c) 2013 Georg Ehrke georg@ownCloud.com
|
|
* This file is licensed under the Affero General Public License version 3 or
|
|
* later.
|
|
* See the COPYING-README file.
|
|
*
|
|
* Thumbnails:
|
|
* structure of filename:
|
|
* /data/user/thumbnails/pathhash/x-y.png
|
|
*
|
|
*/
|
|
namespace OC;
|
|
|
|
use OC\Preview\Provider;
|
|
use OCP\Files\FileInfo;
|
|
use OCP\Files\NotFoundException;
|
|
|
|
class Preview {
|
|
//the thumbnail folder
|
|
const THUMBNAILS_FOLDER = 'thumbnails';
|
|
|
|
//config
|
|
private $maxScaleFactor;
|
|
private $configMaxX;
|
|
private $configMaxY;
|
|
|
|
//fileview object
|
|
private $fileView = null;
|
|
private $userView = null;
|
|
|
|
//vars
|
|
private $file;
|
|
private $maxX;
|
|
private $maxY;
|
|
private $scalingUp;
|
|
private $mimeType;
|
|
private $keepAspect = false;
|
|
|
|
//filemapper used for deleting previews
|
|
// index is path, value is fileinfo
|
|
static public $deleteFileMapper = array();
|
|
static public $deleteChildrenMapper = array();
|
|
|
|
/**
|
|
* preview images object
|
|
*
|
|
* @var \OC_Image
|
|
*/
|
|
private $preview;
|
|
|
|
//preview providers
|
|
static private $providers = array();
|
|
static private $registeredProviders = array();
|
|
static private $enabledProviders = array();
|
|
|
|
/**
|
|
* @var \OCP\Files\FileInfo
|
|
*/
|
|
protected $info;
|
|
|
|
/**
|
|
* check if thumbnail or bigger version of thumbnail of file is cached
|
|
* @param string $user userid - if no user is given, OC_User::getUser will be used
|
|
* @param string $root path of root
|
|
* @param string $file The path to the file where you want a thumbnail from
|
|
* @param int $maxX The maximum X size of the thumbnail. It can be smaller depending on the shape of the image
|
|
* @param int $maxY The maximum Y size of the thumbnail. It can be smaller depending on the shape of the image
|
|
* @param bool $scalingUp Disable/Enable upscaling of previews
|
|
* @throws \Exception
|
|
* @return mixed (bool / string)
|
|
* false if thumbnail does not exist
|
|
* path to thumbnail if thumbnail exists
|
|
*/
|
|
public function __construct($user = '', $root = '/', $file = '', $maxX = 1, $maxY = 1, $scalingUp = true) {
|
|
//init fileviews
|
|
if ($user === '') {
|
|
$user = \OC_User::getUser();
|
|
}
|
|
$this->fileView = new \OC\Files\View('/' . $user . '/' . $root);
|
|
$this->userView = new \OC\Files\View('/' . $user);
|
|
|
|
//set config
|
|
$this->configMaxX = \OC_Config::getValue('preview_max_x', null);
|
|
$this->configMaxY = \OC_Config::getValue('preview_max_y', null);
|
|
$this->maxScaleFactor = \OC_Config::getValue('preview_max_scale_factor', 2);
|
|
|
|
//save parameters
|
|
$this->setFile($file);
|
|
$this->setMaxX($maxX);
|
|
$this->setMaxY($maxY);
|
|
$this->setScalingUp($scalingUp);
|
|
|
|
$this->preview = null;
|
|
|
|
//check if there are preview backends
|
|
if (empty(self::$providers)) {
|
|
self::initProviders();
|
|
}
|
|
|
|
if (empty(self::$providers) && \OC::$server->getConfig()->getSystemValue('enable_previews', true)) {
|
|
\OC_Log::write('core', 'No preview providers exist', \OC_Log::ERROR);
|
|
throw new \Exception('No preview providers');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* returns the path of the file you want a thumbnail from
|
|
* @return string
|
|
*/
|
|
public function getFile() {
|
|
return $this->file;
|
|
}
|
|
|
|
/**
|
|
* returns the max width of the preview
|
|
* @return integer
|
|
*/
|
|
public function getMaxX() {
|
|
return $this->maxX;
|
|
}
|
|
|
|
/**
|
|
* returns the max height of the preview
|
|
* @return integer
|
|
*/
|
|
public function getMaxY() {
|
|
return $this->maxY;
|
|
}
|
|
|
|
/**
|
|
* returns whether or not scalingup is enabled
|
|
* @return bool
|
|
*/
|
|
public function getScalingUp() {
|
|
return $this->scalingUp;
|
|
}
|
|
|
|
/**
|
|
* returns the name of the thumbnailfolder
|
|
* @return string
|
|
*/
|
|
public function getThumbnailsFolder() {
|
|
return self::THUMBNAILS_FOLDER;
|
|
}
|
|
|
|
/**
|
|
* returns the max scale factor
|
|
* @return string
|
|
*/
|
|
public function getMaxScaleFactor() {
|
|
return $this->maxScaleFactor;
|
|
}
|
|
|
|
/**
|
|
* returns the max width set in ownCloud's config
|
|
* @return string
|
|
*/
|
|
public function getConfigMaxX() {
|
|
return $this->configMaxX;
|
|
}
|
|
|
|
/**
|
|
* returns the max height set in ownCloud's config
|
|
* @return string
|
|
*/
|
|
public function getConfigMaxY() {
|
|
return $this->configMaxY;
|
|
}
|
|
|
|
/**
|
|
* @return false|Files\FileInfo|\OCP\Files\FileInfo
|
|
*/
|
|
protected function getFileInfo() {
|
|
$absPath = $this->fileView->getAbsolutePath($this->file);
|
|
$absPath = Files\Filesystem::normalizePath($absPath);
|
|
if(array_key_exists($absPath, self::$deleteFileMapper)) {
|
|
$this->info = self::$deleteFileMapper[$absPath];
|
|
} else if (!$this->info) {
|
|
$this->info = $this->fileView->getFileInfo($this->file);
|
|
}
|
|
return $this->info;
|
|
}
|
|
|
|
|
|
/**
|
|
* @return array|null
|
|
*/
|
|
private function getChildren() {
|
|
$absPath = $this->fileView->getAbsolutePath($this->file);
|
|
$absPath = Files\Filesystem::normalizePath($absPath);
|
|
|
|
if (array_key_exists($absPath, self::$deleteChildrenMapper)) {
|
|
return self::$deleteChildrenMapper[$absPath];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* set the path of the file you want a thumbnail from
|
|
* @param string $file
|
|
* @return $this
|
|
*/
|
|
public function setFile($file) {
|
|
$this->file = $file;
|
|
$this->info = null;
|
|
|
|
if ($file !== '') {
|
|
$this->getFileInfo();
|
|
if($this->info instanceof \OCP\Files\FileInfo) {
|
|
$this->mimeType = $this->info->getMimetype();
|
|
}
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* set mime type explicitly
|
|
* @param string $mimeType
|
|
*/
|
|
public function setMimetype($mimeType) {
|
|
$this->mimeType = $mimeType;
|
|
}
|
|
|
|
/**
|
|
* set the the max width of the preview
|
|
* @param int $maxX
|
|
* @throws \Exception
|
|
* @return \OC\Preview $this
|
|
*/
|
|
public function setMaxX($maxX = 1) {
|
|
if ($maxX <= 0) {
|
|
throw new \Exception('Cannot set width of 0 or smaller!');
|
|
}
|
|
$configMaxX = $this->getConfigMaxX();
|
|
if (!is_null($configMaxX)) {
|
|
if ($maxX > $configMaxX) {
|
|
\OC_Log::write('core', 'maxX reduced from ' . $maxX . ' to ' . $configMaxX, \OC_Log::DEBUG);
|
|
$maxX = $configMaxX;
|
|
}
|
|
}
|
|
$this->maxX = $maxX;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* set the the max height of the preview
|
|
* @param int $maxY
|
|
* @throws \Exception
|
|
* @return \OC\Preview $this
|
|
*/
|
|
public function setMaxY($maxY = 1) {
|
|
if ($maxY <= 0) {
|
|
throw new \Exception('Cannot set height of 0 or smaller!');
|
|
}
|
|
$configMaxY = $this->getConfigMaxY();
|
|
if (!is_null($configMaxY)) {
|
|
if ($maxY > $configMaxY) {
|
|
\OC_Log::write('core', 'maxX reduced from ' . $maxY . ' to ' . $configMaxY, \OC_Log::DEBUG);
|
|
$maxY = $configMaxY;
|
|
}
|
|
}
|
|
$this->maxY = $maxY;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* set whether or not scalingup is enabled
|
|
* @param bool $scalingUp
|
|
* @return \OC\Preview $this
|
|
*/
|
|
public function setScalingup($scalingUp) {
|
|
if ($this->getMaxScaleFactor() === 1) {
|
|
$scalingUp = false;
|
|
}
|
|
$this->scalingUp = $scalingUp;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* @param bool $keepAspect
|
|
* @return $this
|
|
*/
|
|
public function setKeepAspect($keepAspect) {
|
|
$this->keepAspect = $keepAspect;
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* check if all parameters are valid
|
|
* @return bool
|
|
*/
|
|
public function isFileValid() {
|
|
$file = $this->getFile();
|
|
if ($file === '') {
|
|
\OC_Log::write('core', 'No filename passed', \OC_Log::DEBUG);
|
|
return false;
|
|
}
|
|
|
|
if (!$this->fileView->file_exists($file)) {
|
|
\OC_Log::write('core', 'File:"' . $file . '" not found', \OC_Log::DEBUG);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* deletes previews of a file with specific x and y
|
|
* @return bool
|
|
*/
|
|
public function deletePreview() {
|
|
$file = $this->getFile();
|
|
|
|
$fileInfo = $this->getFileInfo($file);
|
|
if($fileInfo !== null && $fileInfo !== false) {
|
|
$fileId = $fileInfo->getId();
|
|
|
|
$previewPath = $this->buildCachePath($fileId);
|
|
return $this->userView->unlink($previewPath);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* deletes all previews of a file
|
|
*/
|
|
public function deleteAllPreviews() {
|
|
$toDelete = $this->getChildren();
|
|
$toDelete[] = $this->getFileInfo();
|
|
|
|
foreach ($toDelete as $delete) {
|
|
if ($delete instanceof FileInfo) {
|
|
/** @var \OCP\Files\FileInfo $delete */
|
|
$fileId = $delete->getId();
|
|
|
|
// getId() might return null, e.g. when the file is a
|
|
// .ocTransferId*.part file from chunked file upload.
|
|
if (!empty($fileId)) {
|
|
$previewPath = $this->getPreviewPath($fileId);
|
|
$this->userView->deleteAll($previewPath);
|
|
$this->userView->rmdir($previewPath);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* check if thumbnail or bigger version of thumbnail of file is cached
|
|
* @param int $fileId fileId of the original image
|
|
* @return string|false path to thumbnail if it exists or false
|
|
*/
|
|
public function isCached($fileId) {
|
|
if (is_null($fileId)) {
|
|
return false;
|
|
}
|
|
|
|
$preview = $this->buildCachePath($fileId);
|
|
|
|
//does a preview with the wanted height and width already exist?
|
|
if ($this->userView->file_exists($preview)) {
|
|
return $preview;
|
|
}
|
|
|
|
return $this->isCachedBigger($fileId);
|
|
}
|
|
|
|
/**
|
|
* check if a bigger version of thumbnail of file is cached
|
|
* @param int $fileId fileId of the original image
|
|
* @return string|false path to bigger thumbnail if it exists or false
|
|
*/
|
|
private function isCachedBigger($fileId) {
|
|
|
|
if (is_null($fileId)) {
|
|
return false;
|
|
}
|
|
|
|
// in order to not loose quality we better generate aspect preserving previews from the original file
|
|
if ($this->keepAspect) {
|
|
return false;
|
|
}
|
|
|
|
$maxX = $this->getMaxX();
|
|
|
|
//array for usable cached thumbnails
|
|
$possibleThumbnails = $this->getPossibleThumbnails($fileId);
|
|
|
|
foreach ($possibleThumbnails as $width => $path) {
|
|
if ($width < $maxX) {
|
|
continue;
|
|
} else {
|
|
return $path;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* get possible bigger thumbnails of the given image
|
|
* @param int $fileId fileId of the original image
|
|
* @return array an array of paths to bigger thumbnails
|
|
*/
|
|
private function getPossibleThumbnails($fileId) {
|
|
|
|
if (is_null($fileId)) {
|
|
return array();
|
|
}
|
|
|
|
$previewPath = $this->getPreviewPath($fileId);
|
|
|
|
$wantedAspectRatio = (float) ($this->getMaxX() / $this->getMaxY());
|
|
|
|
//array for usable cached thumbnails
|
|
$possibleThumbnails = array();
|
|
|
|
$allThumbnails = $this->userView->getDirectoryContent($previewPath);
|
|
foreach ($allThumbnails as $thumbnail) {
|
|
$name = rtrim($thumbnail['name'], '.png');
|
|
list($x, $y, $aspectRatio) = $this->getDimensionsFromFilename($name);
|
|
|
|
if (abs($aspectRatio - $wantedAspectRatio) >= 0.000001
|
|
|| $this->unscalable($x, $y)
|
|
) {
|
|
continue;
|
|
}
|
|
$possibleThumbnails[$x] = $thumbnail['path'];
|
|
}
|
|
|
|
ksort($possibleThumbnails);
|
|
|
|
return $possibleThumbnails;
|
|
}
|
|
|
|
/**
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
private function getDimensionsFromFilename($name) {
|
|
$size = explode('-', $name);
|
|
$x = (int) $size[0];
|
|
$y = (int) $size[1];
|
|
$aspectRatio = (float) ($x / $y);
|
|
return array($x, $y, $aspectRatio);
|
|
}
|
|
|
|
/**
|
|
* @param int $x
|
|
* @param int $y
|
|
* @return bool
|
|
*/
|
|
private function unscalable($x, $y) {
|
|
|
|
$maxX = $this->getMaxX();
|
|
$maxY = $this->getMaxY();
|
|
$scalingUp = $this->getScalingUp();
|
|
$maxScaleFactor = $this->getMaxScaleFactor();
|
|
|
|
if ($x < $maxX || $y < $maxY) {
|
|
if ($scalingUp) {
|
|
$scalefactor = $maxX / $x;
|
|
if ($scalefactor > $maxScaleFactor) {
|
|
return true;
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* return a preview of a file
|
|
* @return \OC_Image
|
|
*/
|
|
public function getPreview() {
|
|
if (!is_null($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;
|
|
}
|
|
|
|
/**
|
|
* @param null|string $mimeType
|
|
* @throws NotFoundException
|
|
*/
|
|
public function showPreview($mimeType = null) {
|
|
// Check if file is valid
|
|
if($this->isFileValid() === false) {
|
|
throw new NotFoundException('File not found.');
|
|
}
|
|
|
|
\OCP\Response::enableCaching(3600 * 24); // 24 hours
|
|
if (is_null($this->preview)) {
|
|
$this->getPreview();
|
|
}
|
|
if ($this->preview instanceof \OC_Image) {
|
|
$this->preview->show($mimeType);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* resize, crop and fix orientation
|
|
* @return void
|
|
*/
|
|
private function resizeAndCrop() {
|
|
$image = $this->preview;
|
|
$x = $this->getMaxX();
|
|
$y = $this->getMaxY();
|
|
$scalingUp = $this->getScalingUp();
|
|
$maxScaleFactor = $this->getMaxScaleFactor();
|
|
|
|
if (!($image instanceof \OC_Image)) {
|
|
\OC_Log::write('core', '$this->preview is not an instance of OC_Image', \OC_Log::DEBUG);
|
|
return;
|
|
}
|
|
|
|
$realX = (int)$image->width();
|
|
$realY = (int)$image->height();
|
|
|
|
// compute $maxY and $maxX using the aspect of the generated preview
|
|
if ($this->keepAspect) {
|
|
$ratio = $realX / $realY;
|
|
if($x / $ratio < $y) {
|
|
// width restricted
|
|
$y = $x / $ratio;
|
|
} else {
|
|
$x = $y * $ratio;
|
|
}
|
|
}
|
|
|
|
if ($x === $realX && $y === $realY) {
|
|
$this->preview = $image;
|
|
return;
|
|
}
|
|
|
|
$factorX = $x / $realX;
|
|
$factorY = $y / $realY;
|
|
|
|
if ($factorX >= $factorY) {
|
|
$factor = $factorX;
|
|
} else {
|
|
$factor = $factorY;
|
|
}
|
|
|
|
if ($scalingUp === false) {
|
|
if ($factor > 1) {
|
|
$factor = 1;
|
|
}
|
|
}
|
|
|
|
if (!is_null($maxScaleFactor)) {
|
|
if ($factor > $maxScaleFactor) {
|
|
\OC_Log::write('core', 'scale factor reduced from ' . $factor . ' to ' . $maxScaleFactor, \OC_Log::DEBUG);
|
|
$factor = $maxScaleFactor;
|
|
}
|
|
}
|
|
|
|
$newXSize = (int)($realX * $factor);
|
|
$newYSize = (int)($realY * $factor);
|
|
|
|
$image->preciseResize($newXSize, $newYSize);
|
|
|
|
if ($newXSize === $x && $newYSize === $y) {
|
|
$this->preview = $image;
|
|
return;
|
|
}
|
|
|
|
if ($newXSize >= $x && $newYSize >= $y) {
|
|
$cropX = floor(abs($x - $newXSize) * 0.5);
|
|
//don't crop previews on the Y axis, this sucks if it's a document.
|
|
//$cropY = floor(abs($y - $newYsize) * 0.5);
|
|
$cropY = 0;
|
|
|
|
$image->crop($cropX, $cropY, $x, $y);
|
|
|
|
$this->preview = $image;
|
|
return;
|
|
}
|
|
|
|
if (($newXSize < $x || $newYSize < $y) && $scalingUp) {
|
|
if ($newXSize > $x) {
|
|
$cropX = floor(($newXSize - $x) * 0.5);
|
|
$image->crop($cropX, 0, $x, $newYSize);
|
|
}
|
|
|
|
if ($newYSize > $y) {
|
|
$cropY = floor(($newYSize - $y) * 0.5);
|
|
$image->crop(0, $cropY, $newXSize, $y);
|
|
}
|
|
|
|
$newXSize = (int)$image->width();
|
|
$newYSize = (int)$image->height();
|
|
|
|
//create transparent background layer
|
|
$backgroundLayer = imagecreatetruecolor($x, $y);
|
|
$white = imagecolorallocate($backgroundLayer, 255, 255, 255);
|
|
imagefill($backgroundLayer, 0, 0, $white);
|
|
|
|
$image = $image->resource();
|
|
|
|
$mergeX = floor(abs($x - $newXSize) * 0.5);
|
|
$mergeY = floor(abs($y - $newYSize) * 0.5);
|
|
|
|
imagecopy($backgroundLayer, $image, $mergeX, $mergeY, 0, 0, $newXSize, $newYSize);
|
|
|
|
//$black = imagecolorallocate(0,0,0);
|
|
//imagecolortransparent($transparentlayer, $black);
|
|
|
|
$image = new \OC_Image($backgroundLayer);
|
|
|
|
$this->preview = $image;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* register a new preview provider to be used
|
|
* @param string $class
|
|
* @param array $options
|
|
*/
|
|
public static function registerProvider($class, $options = array()) {
|
|
/**
|
|
* Only register providers that have been explicitly enabled
|
|
*
|
|
* The following providers are enabled by default:
|
|
* - OC\Preview\Image
|
|
* - OC\Preview\MP3
|
|
* - OC\Preview\TXT
|
|
* - OC\Preview\MarkDown
|
|
*
|
|
* The following providers are disabled by default due to performance or privacy concerns:
|
|
* - OC\Preview\MSOfficeDoc
|
|
* - OC\Preview\MSOffice2003
|
|
* - OC\Preview\MSOffice2007
|
|
* - OC\Preview\OpenDocument
|
|
* - OC\Preview\StarOffice
|
|
* - OC\Preview\SVG
|
|
* - OC\Preview\Movie
|
|
* - OC\Preview\PDF
|
|
* - OC\Preview\TIFF
|
|
* - OC\Preview\Illustrator
|
|
* - OC\Preview\Postscript
|
|
* - OC\Preview\Photoshop
|
|
*/
|
|
if(empty(self::$enabledProviders)) {
|
|
self::$enabledProviders = \OC::$server->getConfig()->getSystemValue('enabledPreviewProviders', array(
|
|
'OC\Preview\Image',
|
|
'OC\Preview\MP3',
|
|
'OC\Preview\TXT',
|
|
'OC\Preview\MarkDown',
|
|
));
|
|
}
|
|
|
|
if(in_array($class, self::$enabledProviders)) {
|
|
self::$registeredProviders[] = array('class' => $class, 'options' => $options);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* create instances of all the registered preview providers
|
|
* @return void
|
|
*/
|
|
private static function initProviders() {
|
|
if (!\OC::$server->getConfig()->getSystemValue('enable_previews', true)) {
|
|
self::$providers = array();
|
|
return;
|
|
}
|
|
|
|
if (!empty(self::$providers)) {
|
|
return;
|
|
}
|
|
|
|
self::registerCoreProviders();
|
|
foreach (self::$registeredProviders as $provider) {
|
|
$class = $provider['class'];
|
|
$options = $provider['options'];
|
|
|
|
/** @var $object Provider */
|
|
$object = new $class($options);
|
|
self::$providers[$object->getMimeType()] = $object;
|
|
}
|
|
|
|
$keys = array_map('strlen', array_keys(self::$providers));
|
|
array_multisort($keys, SORT_DESC, self::$providers);
|
|
}
|
|
|
|
protected static function registerCoreProviders() {
|
|
self::registerProvider('OC\Preview\TXT');
|
|
self::registerProvider('OC\Preview\MarkDown');
|
|
self::registerProvider('OC\Preview\Image');
|
|
self::registerProvider('OC\Preview\MP3');
|
|
|
|
// SVG, Office and Bitmap require imagick
|
|
if (extension_loaded('imagick')) {
|
|
$checkImagick = new \Imagick();
|
|
|
|
$imagickProviders = array(
|
|
'SVG' => 'OC\Preview\SVG',
|
|
'TIFF' => 'OC\Preview\TIFF',
|
|
'PDF' => 'OC\Preview\PDF',
|
|
'AI' => 'OC\Preview\Illustrator',
|
|
'PSD' => 'OC\Preview\Photoshop',
|
|
// Requires adding 'eps' => array('application/postscript', null), to lib/private/mimetypes.list.php
|
|
'EPS' => 'OC\Preview\Postscript',
|
|
);
|
|
|
|
foreach ($imagickProviders as $queryFormat => $provider) {
|
|
if (count($checkImagick->queryFormats($queryFormat)) === 1) {
|
|
self::registerProvider($provider);
|
|
}
|
|
}
|
|
|
|
if (count($checkImagick->queryFormats('PDF')) === 1) {
|
|
// Office previews are currently not supported on Windows
|
|
if (!\OC_Util::runningOnWindows() && \OC_Helper::is_function_enabled('shell_exec')) {
|
|
$officeFound = is_string(\OC::$server->getConfig()->getSystemValue('preview_libreoffice_path', null));
|
|
|
|
if (!$officeFound) {
|
|
//let's see if there is libreoffice or openoffice on this machine
|
|
$whichLibreOffice = shell_exec('command -v libreoffice');
|
|
$officeFound = !empty($whichLibreOffice);
|
|
if (!$officeFound) {
|
|
$whichOpenOffice = shell_exec('command -v openoffice');
|
|
$officeFound = !empty($whichOpenOffice);
|
|
}
|
|
}
|
|
|
|
if ($officeFound) {
|
|
self::registerProvider('OC\Preview\MSOfficeDoc');
|
|
self::registerProvider('OC\Preview\MSOffice2003');
|
|
self::registerProvider('OC\Preview\MSOffice2007');
|
|
self::registerProvider('OC\Preview\OpenDocument');
|
|
self::registerProvider('OC\Preview\StarOffice');
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Video requires avconv or ffmpeg and is therefor
|
|
// currently not supported on Windows.
|
|
if (!\OC_Util::runningOnWindows()) {
|
|
$avconvBinary = \OC_Helper::findBinaryPath('avconv');
|
|
$ffmpegBinary = ($avconvBinary) ? null : \OC_Helper::findBinaryPath('ffmpeg');
|
|
|
|
if ($avconvBinary || $ffmpegBinary) {
|
|
// FIXME // a bit hacky but didn't want to use subclasses
|
|
\OC\Preview\Movie::$avconvBinary = $avconvBinary;
|
|
\OC\Preview\Movie::$ffmpegBinary = $ffmpegBinary;
|
|
|
|
self::registerProvider('OC\Preview\Movie');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
*/
|
|
public static function post_write($args) {
|
|
self::post_delete($args, 'files/');
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
*/
|
|
public static function prepare_delete_files($args) {
|
|
self::prepare_delete($args, 'files/');
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @param string $prefix
|
|
*/
|
|
public static function prepare_delete($args, $prefix='') {
|
|
$path = $args['path'];
|
|
if (substr($path, 0, 1) === '/') {
|
|
$path = substr($path, 1);
|
|
}
|
|
|
|
$view = new \OC\Files\View('/' . \OC_User::getUser() . '/' . $prefix);
|
|
|
|
$absPath = Files\Filesystem::normalizePath($view->getAbsolutePath($path));
|
|
self::addPathToDeleteFileMapper($absPath, $view->getFileInfo($path));
|
|
if ($view->is_dir($path)) {
|
|
$children = self::getAllChildren($view, $path);
|
|
self::$deleteChildrenMapper[$absPath] = $children;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $absolutePath
|
|
* @param \OCP\Files\FileInfo $info
|
|
*/
|
|
private static function addPathToDeleteFileMapper($absolutePath, $info) {
|
|
self::$deleteFileMapper[$absolutePath] = $info;
|
|
}
|
|
|
|
/**
|
|
* @param \OC\Files\View $view
|
|
* @param string $path
|
|
* @return array
|
|
*/
|
|
private static function getAllChildren($view, $path) {
|
|
$children = $view->getDirectoryContent($path);
|
|
$childrensFiles = array();
|
|
|
|
$fakeRootLength = strlen($view->getRoot());
|
|
|
|
for ($i = 0; $i < count($children); $i++) {
|
|
$child = $children[$i];
|
|
|
|
$childsPath = substr($child->getPath(), $fakeRootLength);
|
|
|
|
if ($view->is_dir($childsPath)) {
|
|
$children = array_merge(
|
|
$children,
|
|
$view->getDirectoryContent($childsPath)
|
|
);
|
|
} else {
|
|
$childrensFiles[] = $child;
|
|
}
|
|
}
|
|
|
|
return $childrensFiles;
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
*/
|
|
public static function post_delete_files($args) {
|
|
self::post_delete($args, 'files/');
|
|
}
|
|
|
|
/**
|
|
* @param array $args
|
|
* @param string $prefix
|
|
*/
|
|
public static function post_delete($args, $prefix='') {
|
|
$path = Files\Filesystem::normalizePath($args['path']);
|
|
|
|
$preview = new Preview(\OC_User::getUser(), $prefix, $path);
|
|
$preview->deleteAllPreviews();
|
|
}
|
|
|
|
/**
|
|
* Check if a preview can be generated for a file
|
|
*
|
|
* @param \OC\Files\FileInfo $file
|
|
* @return bool
|
|
*/
|
|
public static function isAvailable(\OC\Files\FileInfo $file) {
|
|
if (!\OC_Config::getValue('enable_previews', true)) {
|
|
return false;
|
|
}
|
|
|
|
$mount = $file->getMountPoint();
|
|
if ($mount and !$mount->getOption('previews', true)){
|
|
return false;
|
|
}
|
|
|
|
//check if there are preview backends
|
|
if (empty(self::$providers)) {
|
|
self::initProviders();
|
|
}
|
|
|
|
foreach (self::$providers as $supportedMimeType => $provider) {
|
|
/**
|
|
* @var \OC\Preview\Provider $provider
|
|
*/
|
|
if (preg_match($supportedMimeType, $file->getMimetype())) {
|
|
return $provider->isAvailable($file);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param string $mimeType
|
|
* @return bool
|
|
*/
|
|
public static function isMimeSupported($mimeType) {
|
|
if (!\OC_Config::getValue('enable_previews', true)) {
|
|
return false;
|
|
}
|
|
|
|
//check if there are preview backends
|
|
if (empty(self::$providers)) {
|
|
self::initProviders();
|
|
}
|
|
|
|
foreach(self::$providers as $supportedMimetype => $provider) {
|
|
if(preg_match($supportedMimetype, $mimeType)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param int $fileId
|
|
* @return string
|
|
*/
|
|
private function buildCachePath($fileId) {
|
|
$maxX = $this->getMaxX();
|
|
$maxY = $this->getMaxY();
|
|
|
|
$previewPath = $this->getPreviewPath($fileId);
|
|
$preview = $previewPath . strval($maxX) . '-' . strval($maxY);
|
|
if ($this->keepAspect) {
|
|
$preview .= '-with-aspect';
|
|
}
|
|
$preview .= '.png';
|
|
|
|
return $preview;
|
|
}
|
|
|
|
|
|
/**
|
|
* @param int $fileId
|
|
* @return string
|
|
*/
|
|
private function getPreviewPath($fileId) {
|
|
return $this->getThumbnailsFolder() . '/' . $fileId . '/';
|
|
}
|
|
}
|