mirror of
https://git.code.sf.net/p/seeddms/code
synced 2025-02-06 23:24:57 +00:00
368 lines
9.9 KiB
PHP
368 lines
9.9 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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/**
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* @var array $converters list of mimetypes and commands for converting
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* file into preview image
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* @access protected
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*/
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protected $converters;
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/**
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* @var integer $timeout maximum time for execution of external commands
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* @access protected
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*/
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protected $timeout;
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function __construct($previewDir, $width=40, $timeout=5) {
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if(!is_dir($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($width);
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$this->converters = array(
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'image/png' => "convert -resize %wx '%f' '%o'",
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'image/gif' => "convert -resize %wx '%f' '%o'",
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'image/jpg' => "convert -resize %wx '%f' '%o'",
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'image/jpeg' => "convert -resize %wx '%f' '%o'",
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'image/svg+xml' => "convert -resize %wx '%f' '%o'",
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'text/plain' => "convert -resize %wx '%f' '%o'",
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'application/pdf' => "convert -density 100 -resize %wx '%f[0]' '%o'",
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'application/postscript' => "convert -density 100 -resize %wx '%f[0]' '%o'",
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'application/x-compressed-tar' => "tar tzvf '%f' | convert -density 100 -resize %wx text:-[0] '%o",
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);
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$this->timeout = intval($timeout);
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}
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static function execWithTimeout($cmd, $timeout=5) { /* {{{ */
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$descriptorspec = array(
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0 => array("pipe", "r"),
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1 => array("pipe", "w"),
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2 => array("pipe", "w")
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);
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$pipes = array();
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$timeout += time();
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$process = proc_open($cmd, $descriptorspec, $pipes);
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if (!is_resource($process)) {
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throw new Exception("proc_open failed on: " . $cmd);
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}
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$output = '';
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do {
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$timeleft = $timeout - time();
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$read = array($pipes[1]);
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$write = NULL;
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$exeptions = NULL;
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stream_select($read, $write, $exeptions, $timeleft, 200000);
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if (!empty($read)) {
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$output .= fread($pipes[1], 8192);
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}
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} while (!feof($pipes[1]) && $timeleft > 0);
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if ($timeleft <= 0) {
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proc_terminate($process);
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throw new Exception("command timeout on: " . $cmd);
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} else {
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return $output;
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}
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} /* }}} */
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/**
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* Set a list of converters
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*
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* @param array list of converters. The key of the array contains the mimetype
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* and the value is the command to be called for creating the preview
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*/
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function setConverters($arr) { /* {{{ */
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$this->converters = array_merge($arr, $this->converters);
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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, $width) { /* {{{ */
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if(!$object)
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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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switch(get_class($object)) {
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case "SeedDMS_Core_DocumentContent":
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$target = $dir.'p'.$object->getVersion().'-'.$width;
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break;
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case "SeedDMS_Core_DocumentFile":
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$target = $dir.'f'.$object->getID().'-'.$width;
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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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/**
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* Create a preview image for a given file
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*
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* @param string $infile name of input file including full path
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* @param string $dir directory relative to $this->previewDir
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* @param string $mimetype MimeType of input file
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* @param integer $width width of generated preview image
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* @return boolean true on success, false on failure
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*/
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public function createRawPreview($infile, $dir, $mimetype, $width=0, $target='') { /* {{{ */
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if($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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if(!is_dir($this->previewDir.'/'.$dir)) {
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if (!SeedDMS_Core_File::makeDir($this->previewDir.'/'.$dir)) {
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return false;
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}
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}
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if(!file_exists($infile))
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return false;
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if(!$target)
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$target = $this->previewDir.$dir.md5($infile).'-'.$width;
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if($target != '' && (!file_exists($target.'.png') || filectime($target.'.png') < filectime($infile))) {
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$cmd = '';
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if(isset($this->converters[$mimetype])) {
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$cmd = str_replace(array('%w', '%f', '%o'), array($width, $infile, $target.'.png'), $this->converters[$mimetype]);
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}
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/*
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switch($mimetype) {
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case "image/png":
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case "image/gif":
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case "image/jpeg":
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case "image/jpg":
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case "image/svg+xml":
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$cmd = 'convert -resize '.$width.'x '.$infile.' '.$target.'.png';
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break;
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case "application/pdf":
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case "application/postscript":
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$cmd = 'convert -density 100 -resize '.$width.'x '.$infile.'[0] '.$target.'.png';
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break;
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case "text/plain":
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$cmd = 'convert -resize '.$width.'x '.$infile.'[0] '.$target.'.png';
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break;
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case "application/x-compressed-tar":
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$cmd = 'tar tzvf '.$infile.' | convert -density 100 -resize '.$width.'x text:-[0] '.$target.'.png';
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break;
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}
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*/
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if($cmd) {
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//exec($cmd);
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try {
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self::execWithTimeout($cmd, $this->timeout);
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} catch(Exception $e) {
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}
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}
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return true;
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}
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return true;
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} /* }}} */
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public function createPreview($object, $width=0) { /* {{{ */
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if(!$object)
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return false;
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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($width);
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$document = $object->getDocument();
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$file = $document->_dms->contentDir.$object->getPath();
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$target = $this->getFileName($object, $width);
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return $this->createRawPreview($file, $document->getDir(), $object->getMimeType(), $width, $target);
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if($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($target.'.png') || filectime($target.'.png') < $object->getDate())) {
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$cmd = '';
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if(isset($this->converters[$object->getMimeType()])) {
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$cmd = str_replace(array('%w', '%f', '%o'), array($width, $file, $target), $this->converters[$object->getMimeType()]);
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}
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/*
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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.' '.$target.'.png';
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break;
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case "application/pdf":
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case "application/postscript":
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$cmd = 'convert -density 100 -resize '.$width.'x '.$file.'[0] '.$target.'.png';
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break;
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case "text/plain":
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$cmd = 'convert -resize '.$width.'x '.$file.'[0] '.$target.'.png';
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break;
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case "application/x-compressed-tar":
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$cmd = 'tar tzvf '.$file.' | convert -density 100 -resize '.$width.'x text:-[0] '.$target.'.png';
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break;
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}
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*/
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if($cmd) {
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//exec($cmd);
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try {
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self::execWithTimeout($cmd, $this->timeout);
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} catch(Exception $e) {
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}
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}
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return true;
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}
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return true;
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} /* }}} */
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public function hasRawPreview($infile, $dir, $width=0) { /* {{{ */
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if($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 = $this->previewDir.$dir.md5($infile).'-'.$width;
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if($target !== false && file_exists($target.'.png') && filectime($target.'.png') >= filectime($infile)) {
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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 hasPreview($object, $width=0) { /* {{{ */
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if(!$object)
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return false;
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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($target.'.png') && filectime($target.'.png') >= $object->getDate()) {
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return true;
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}
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return false;
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} /* }}} */
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public function getRawPreview($infile, $dir, $width=0) { /* {{{ */
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if($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 = $this->previewDir.$dir.md5($infile).'-'.$width;
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if($target && file_exists($target.'.png')) {
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readfile($target.'.png');
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}
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} /* }}} */
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public function getPreview($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($target.'.png')) {
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readfile($target.'.png');
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}
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} /* }}} */
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public function getFilesize($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($width);
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$target = $this->getFileName($object, $width);
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if($target && file_exists($target.'.png')) {
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return(filesize($target.'.png'));
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} else {
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return false;
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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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