Abstract parent class for all file preview renderer classes. More...

Inheritance diagram for ilFilePreviewRenderer:

Collaboration diagram for ilFilePreviewRenderer:

Public Member Functions
	getSupportedRepositoryTypes ()
	Gets an array containing the repository types (e.g. More...

	supports ($preview)
	Determines whether the specified preview object is supported by the renderer. More...

	prepareFileForExec ($filepath)
	Checks whether the specified file path can be used with exec() commands. More...

	getSupportedFileFormats ()
	Gets an array containing the file formats that are supported by the renderer. More...

Public Member Functions inherited from ilPreviewRenderer
	getName ()
	Gets the name of the renderer. More...

	isPlugin ()
	Determines whether the renderer is a plugin or a built in one. More...

	getSupportedRepositoryTypes ()
	Gets an array containing the repository types (e.g. More...

	supports ($preview)
	Determines whether the specified preview object is supported by the renderer. More...

	render ($preview, $obj, $async)
	Creates the preview of the specified preview object. More...

Additional Inherited Members
Protected Member Functions inherited from ilPreviewRenderer
	renderImages ($obj)
	Renders the specified object into images. More...

	getImageSize ()
	Gets the size of the preview images in pixels. More...

	getImageQuality ()
	Gets the quality (compression) of the preview images (1-100). More...

	getMaximumNumberOfPreviews ()
	Gets the maximum number of preview pictures per object. More...

Detailed Description

Abstract parent class for all file preview renderer classes.

Author: Stefan Born stefa.nosp@m.n.bo.nosp@m.rn@ph.nosp@m.zh.c.nosp@m.h

Version: $Id$

Definition at line 14 of file class.ilFilePreviewRenderer.php.

Member Function Documentation

◆ getSupportedFileFormats()

ilFilePreviewRenderer::getSupportedFileFormats ( )

abstract

Gets an array containing the file formats that are supported by the renderer.

Returns: array An array containing the supported file formats.

Referenced by prepareFileForExec(), and supports().

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◆ getSupportedRepositoryTypes()

ilFilePreviewRenderer::getSupportedRepositoryTypes ( )

final

Gets an array containing the repository types (e.g.

'file' or 'crs') that are supported by the renderer.

Returns: array An array containing the supported repository types.

Definition at line 21 of file class.ilFilePreviewRenderer.php.

References array.

         {
                 return array("file");
         }

◆ prepareFileForExec()

ilFilePreviewRenderer::prepareFileForExec ( $filepath )

Checks whether the specified file path can be used with exec() commands.

If the file name is not conform with exec() commands, a temporary file is created and the path to that file is returned.

Parameters

string $filepath The path of the file to check.

Returns: string The specified file path if conform with exec(); otherwise, the path to a temporary copy of the file.

Definition at line 68 of file class.ilFilePreviewRenderer.php.

References getSupportedFileFormats(), and ilUtil\ilTempnam().

Referenced by ilGhostscriptRenderer\renderImages(), and ilImageMagickRenderer\renderImages().

         {
                 $pos = strrpos($filepath, "/");
                 $name = $pos !== false ? substr($filepath, $pos + 1) : $filepath;
                 
                 // if the file path contains any characters that could cause problems
                 // we copy the file to a temporary file
                 $normName = preg_replace("/[^A-Za-z0-9.\- +_&]/", "", $name);
                 if ($normName != $name)
                 {
                         $tempPath = ilUtil::ilTempnam();
                         if (copy($filepath, $tempPath))
                                 return $tempPath;
                 }
                 
                 return $filepath;
         }

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◆ supports()

ilFilePreviewRenderer::supports ( $preview )

Determines whether the specified preview object is supported by the renderer.

Parameters

ilPreview $preview The preview object to check.

Returns: bool true, if the renderer supports the specified preview object; otherwise, false.

Definition at line 32 of file class.ilFilePreviewRenderer.php.

References $filename, $preview, ilObjFileAccess\_getFileExtension(), ilObjFile\_lookupFileName(), and getSupportedFileFormats().

         {
                 // let parent check first
                 if (!parent::supports($preview))
                         return false;
                 
                 // get file extension
                 require_once("./Modules/File/classes/class.ilObjFile.php");
                 include_once './Modules/File/classes/class.ilObjFileAccess.php';
                 // bugfix mantis 23293
                 if (isset($_FILES['file']['name']))
                 {
                         $filename = $_FILES['file']['name'];
                 }
                 elseif (isset($_FILES['upload_files']['name']))
                 {
                         $filename = $_FILES['upload_files']['name'];
                 }
                 else
                 {
                         $filename = ilObjFile::_lookupFileName($preview->getObjId());
                 }
                 $ext = ilObjFileAccess::_getFileExtension($filename);
                 
                 // contains that extension?
                 return in_array($ext, $this->getSupportedFileFormats());
         }