mirror of
https://git.code.sf.net/p/seeddms/code
synced 2025-10-29 12:11:18 +00:00
164 lines
4.1 KiB
PHP
164 lines
4.1 KiB
PHP
<?php
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/**
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* Implementation of preview documents
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*
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* @category DMS
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* @package SeedDMS_Preview
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* @license GPL 2
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* @version @version@
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2010, Uwe Steinmann
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* @version Release: @package_version@
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*/
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/**
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* Class for managing creation of preview images for documents.
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*
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* @category DMS
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* @package SeedDMS_Preview
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* @version @version@
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright Copyright (C) 2011, Uwe Steinmann
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* @version Release: @package_version@
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*/
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class SeedDMS_Preview_Previewer {
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/**
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* @var string $cacheDir location in the file system where all the
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* cached data like thumbnails are located. This should be an
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* absolute path.
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* @access public
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*/
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public $previewDir;
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/**
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* @var integer $width maximum width/height of resized image
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* @access protected
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*/
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protected $width;
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function __construct($previewDir, $width=40) {
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if(!is_dir($previewDir)) {
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if (!SeedDMS_Core_File::makeDir($previewDir)) {
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$this->previewDir = '';
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} else {
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$this->previewDir = $previewDir;
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}
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} else {
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$this->previewDir = $previewDir;
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}
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$this->width = intval($width);
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}
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/**
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* Retrieve the physical filename of the preview image on disk
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*
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* @param object $object document content or document file
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* @param integer $width width of preview image
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* @return string file name of preview image
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*/
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protected function getFileName($object, $width) { /* }}} */
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$document = $object->getDocument();
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$dir = $this->previewDir.'/'.$document->getDir();
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switch(get_class($object)) {
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case "SeedDMS_Core_DocumentContent":
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$target = $dir.'p'.$object->getVersion().'-'.$width.'.png';
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break;
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case "SeedDMS_Core_DocumentFile":
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$target = $dir.'f'.$object->getID().'-'.$width.'.png';
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break;
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default:
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return false;
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}
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return $target;
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} /* }}} */
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public function createPreview($object, $width=0) { /* {{{ */
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if($width == 0)
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$width = $this->width;
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else
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$width = intval($width);
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if(!$this->previewDir)
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return false;
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$document = $object->getDocument();
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$dir = $this->previewDir.'/'.$document->getDir();
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if(!is_dir($dir)) {
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if (!SeedDMS_Core_File::makeDir($dir)) {
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return false;
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}
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}
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$file = $document->_dms->contentDir.$object->getPath();
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if(!file_exists($file))
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return false;
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$target = $this->getFileName($object, $width);
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if($target !== false && (!file_exists($target) || filectime($target) < $object->getDate())) {
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$cmd = '';
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switch($object->getMimeType()) {
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case "image/png":
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case "image/gif":
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case "image/jpeg":
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case "image/jpg":
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case "image/svg+xml":
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$cmd = 'convert -resize '.$width.'x '.$file.' '.$target;
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break;
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case "application/pdf":
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case "application/postscript":
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$cmd = 'convert -density 100 -resize '.$width.'x '.$file.'[0] '.$target;
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break;
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case "text/plain":
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$cmd = 'convert -resize '.$width.'x '.$file.'[0] '.$target;
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break;
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case "application/x-compressed-tar":
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$cmd = 'tar tzvf '.$file.' | convert -density 100 -resize '.$width.'x text:-[0] '.$target;
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break;
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}
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if($cmd) {
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exec($cmd);
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}
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return true;
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}
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return true;
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} /* }}} */
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public function hasPreview($object, $width=0) { /* {{{ */
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if($width == 0)
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$width = $this->width;
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else
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$width = intval($width);
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if(!$this->previewDir)
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return false;
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$target = $this->getFileName($object, $width);
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if($target !== false && file_exists($target) && filectime($target) >= $object->getDate()) {
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return true;
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}
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return false;
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} /* }}} */
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public function getPreview($object, $width=0) { /* {{{ */
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if($width == 0)
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$width = $this->width;
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else
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$width = intval($width);
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if(!$this->previewDir)
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return false;
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$target = $this->getFileName($object, $width);
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if($target && file_exists($target)) {
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readfile($target);
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}
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} /* }}} */
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public function deletePreview($document, $object, $width=0) { /* {{{ */
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if($width == 0)
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$width = $this->width;
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else
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$width = intval($width);
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if(!$this->previewDir)
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return false;
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$target = $this->getFileName($object, $width);
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} /* }}} */
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}
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?>
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