Plugins/Blocktype/Jmol

Jmol plugin

Mahara artefact file blocktype jmol plugin

This plugin provides an interactive 3D display of local chemical structure files using the Jmol applet

http://jmol.sourceforge.net

It is similar to other Mahara artefact file blocktype plugins, in particular the Embedded media plugin.

The Jmol applet can use a variety of chemical structure file formats (chemical MIME types)

http://wiki.jmol.org/index.php/File_formats http://www.ch.ic.ac.uk/chemime/

This plugin currently uses the following file types, though others can be easily added (see below)

alc  chemical/x-alchemy     Alchemy
cif  chemical/x-cif         Crystallographic Information File
cml  chemical/x-cml         Chemical Markup Language
hin  chemical/x-hin         HyperChem Input file
mcif chemical/x-mmcif       MacroMolecular Crystallographic Information File
mol  chemical/x-mdl-molfile MDL Molfile
mol2 chemical/x-mol2        SYBYL Tripos Mol2 file format
pdb  chemical/x-pdb         Protein Data Bank
sdf  chemical/x-mdl-sdfile  Structure Data File
xyz  chemical/x-xyz         XYZ Coordinate Animation format

Use

When editing the contents of a Mahara Page (View), drag the Jmol icon from the 'Files, images and videos' tab into your Page (View)

Then upload/select the appropriate file and set the appropriate applet width and height (default 300 px v 300 px)

For more advanced Jmol use, there are a couple of textarea controls that allow you to:

1. Specify an optional Jmol startup script to customise initial display of the applet http://chemapps.stolaf.edu/jmol/docs/

2. Enter optional Jmol.js JavaScript commands to add custom controls below the applet http://jmol.sourceforge.net/jslibrary/

Default script values are applied for general use.

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NB that development has focused on functionality, and there may be security implications of running these scripts. Happy to receive advice and guidance from Mahara security gurus about this.

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Installation

The latest version of the plugin, for Mahara 1.2, 1.3 and 1.4, can be downloaded from Github

https://github.com/geoffrowland/mahara-artefact_file_blocktype_jmol

On unpacking, the /jmol folder (and its contents) is copied into the /artefact/file/blocktype folder of your Mahara installation.

Some other edits of Mahara files are required (or you can copy across the appropriate files from the download bundle).

To

/artefact/file/lang/en.utf8/artefact.file.php

add, immediately after the other file types

// Chemical
$string['alc'] = 'Alchemy File';
$string['cif'] = 'Crystallographic Information File';
$string['cml'] = 'Chemical Markup language';
$string['hin'] = 'HyperChem Input File';
$string['mcif'] = 'MacroMolecular Crystallographic Information File';
$string['mol'] = 'MDL Molfile';
$string['mol2'] = 'SYBYL Tripos Mol2 File';
$string['pdb'] = 'Protein Data Bank';
$string['sdf'] = 'MDL Structure Data File';
$string['xyz'] = 'XYZ Coordinate Animation Format';

To

/artefact/file/lib.php

immediately after

       if ($um->file['type'] == 'application/octet-stream') {
           // the browser wasn't sure, so use file_mime_type to guess
           require_once('file.php');
           $data->filetype = file_mime_type($um->file['tmp_name']);
       }
       else {
           $data->filetype = $um->file['type'];
       }

add

       // The browser may have been wrong, so use file extension to force some mime-types.////
       require_once('file.php'); 
       switch ($um->original_filename_extension()) {
           case 'mm': $data->filetype = 'application/x-freemind';
           break;
           case 'alc': $data->filetype = 'chemical/x-alchemy';
           break;
           case 'cif': $data->filetype = 'chemical/x-cif';
           break;
           case 'cml': $data->filetype = 'chemical/x-cml';
           break;
           case 'hin': $data->filetype = 'chemical/x-hin';
           break;
           case 'mcif': $data->filetype = 'chemical/x-mmcif';
           break;
           case 'mol': $data->filetype = 'chemical/x-mdl-molfile';
           break;
           case 'mol2': $data->filetype = 'chemical/x-mol2';
           break;
           case 'pdb': $data->filetype = 'chemical/x-pdb';
           break;
           case 'sdf': $data->filetype = 'chemical/x-mdl-sdfile';
           break;
           case 'xyz': $data->filetype = 'chemical/x-xyz';
           break;
       }

To

/artefact/file/filetypes.xml

just before

add

   <filetype>
       <description>alc</description>
       <mimetypes>
           <mimetype>chemical/x-alchemy</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>cif</description>
       <mimetypes>
           <mimetype>chemical/x-cif</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>cml</description>
       <mimetypes>
           <mimetype>chemical/x-cml</mimetype>
       </mimetypes>
   </filetype> 
   <filetype>
       <description>hin</description>
       <mimetypes>
           <mimetype>chemical/x-hin</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>mcif</description>
       <mimetypes>
           <mimetype>chemical/x-mmcif</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>mol</description>
       <mimetypes>
           <mimetype>chemical/x-mdl-molfile</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>mol2</description>
       <mimetypes>
           <mimetype>chemical/x-mol2</mimetype>
       </mimetypes>
   </filetype>              
   <filetype>
       <description>pdb</description>
       <mimetypes>
           <mimetype>chemical/x-pdb</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>sdf</description>
       <mimetypes>
           <mimetype>chemical/x-mdl-sdfile</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>xyz</description>
       <mimetypes>
           <mimetype>chemical/x-xyz</mimetype>
       </mimetypes>
   </filetype>
   <filetype>
       <description>mm</description>
       <mimetypes>
           <mimetype>application/x-freemind</mimetype>
       </mimetypes>
   </filetype>

Remember to set appropriate server permissions for the new folders and contents.

You also need to download and unpack the latest Jmol stable version (12.0.43 at the time of writing), rename the unpacked folder (e.g. /jmol-12.0.43) to /jmol and copy this (and its contents) into the /lib folder of your Mahara installation to give /lib/jmol. Not all the contents of the jmol folder are actually required. However, Jmol code is frequently updated so it is convenient to just replace the /jmol folder with the latest version. This folder is shared with the Jmol NIH plugin (if installed).

Finally, visit your Site Administration > Plugin Administration page to enable the plugin. Remember to select the chemical file types you wish to use from the configuration menu.

Of course, for the Jmol plugin, you will need an up-to-date Java installation on the client computer.

http://www.java.com

During configuration and initial display of the Jmol applet in a view, you may have to refresh the browser to see the applet embedded in the Page (View)

See Also

Jmol NIH Plugin

Chem 2D NIH Plugin

To Do

Currently, the plugin adds a default set of controls appropriate for basic organic chemistry

Add option buttons to the file-picker/edit interface for:

• default controls for biological macromolecules (typically .pdb files e.g. from PDB)

• default controls for crystal display (typically .cif files e.g. from AMS or COD)

• other? reaction animations? orbital display?