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make preview converters customizalbe

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This commit is contained in:
Uwe Steinmann 2015-06-25 19:50:47 +02:00
parent 5348905c23
commit 9269a74092
1 changed files with 34 additions and 1 deletions
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35
SeedDMS_Preview/Preview/Previewer.php
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@ -37,6 +37,13 @@ class SeedDMS_Preview_Previewer {
*/
protected $width;
/**
* @var array $converters list of mimetypes and commands for converting
* file into preview image
* @access protected
*/
protected $converters;
function __construct($previewDir, $width=40) {
if(!is_dir($previewDir)) {
if (!SeedDMS_Core_File::makeDir($previewDir)) {
@ -48,8 +55,29 @@ class SeedDMS_Preview_Previewer {
$this->previewDir = $previewDir;
}
$this->width = intval($width);
$this->converters = array(
'image/png' => "convert -resize %wx '%f' '%o'",
'image/gif' => "convert -resize %wx '%f' '%o'",
'image/jpg' => "convert -resize %wx '%f' '%o'",
'image/jpeg' => "convert -resize %wx '%f' '%o'",
'image/svg+xml' => "convert -resize %wx '%f' '%o'",
'text/plain' => "convert -resize %wx '%f' '%o'",
'application/pdf' => "convert -density 100 -resize %wx '%f[0]' '%o'",
'application/postscript' => "convert -density 100 -resize %wx '%f[0]' '%o'",
'application/x-compressed-tar' => "tar tzvf '%f' | convert -density 100 -resize %wx text:-[0] '%o",
);
}
/**
* Set a list of converters
*
* @param array list of converters. The key of the array contains the mimetype
* and the value is the command to be called for creating the preview
*/
function setConverters($arr) { /* {{{ */
$this->converters = array_merge($arr, $this->converters);
} /* }}} */
/**
* Retrieve the physical filename of the preview image on disk
*
@ -57,7 +85,7 @@ class SeedDMS_Preview_Previewer {
* @param integer $width width of preview image
* @return string file name of preview image
*/
protected function getFileName($object, $width) { /* }}} */
protected function getFileName($object, $width) { /* {{{ */
$document = $object->getDocument();
$dir = $this->previewDir.'/'.$document->getDir();
switch(get_class($object)) {
@ -93,6 +121,10 @@ class SeedDMS_Preview_Previewer {
$target = $this->getFileName($object, $width);
if($target !== false && (!file_exists($target) || filectime($target) < $object->getDate())) {
$cmd = '';
if(isset($this->converters[$object->getMimeType()])) {
$cmd = str_replace(array('%w', '%f', '%o'), array($width, $file, $target), $this->converters[$object->getMimeType()]);
}
/*
switch($object->getMimeType()) {
case "image/png":
case "image/gif":
@ -112,6 +144,7 @@ class SeedDMS_Preview_Previewer {
$cmd = 'tar tzvf '.$file.' | convert -density 100 -resize '.$width.'x text:-[0] '.$target;
break;
}
*/
if($cmd) {
exec($cmd);
}