This how-to guides developers through the steps necessary to disable default TinyMCE handling
Proceeding with this guide will disable the ability of the CMS to embed
.swf files through the "Insert Media"
interface button. You will need to provide your own
custom TinyMCE plugins or
embed the files directly via HTML code.
Disable the media plugin
CMS uses the TinyMCE media plugin to embed
.swf files. The side effect of this is that
are managed by the plugin which sometimes prevents custom markup to be inserted, or rewrites it with custom names
In your module's
_config.php (the module's name has to be alphabetically after
cwp for your
not to be overriden, see the notice in the Rich Text Editing
docs) disable the media plugin for the
default editor installed by the
use SilverStripe\Forms\HTMLEditor\HTMLEditorConfig; HTMLEditorConfig::get('cwp')->disablePlugins('media');
Note the editor configuration we want to amend is "cwp" here, different from the default SilverStripe configuration called "cms".
You should now be able to embed any
<object> using the HTML button in the TinyMCE editor.
Modifying the whitelist
If you find out some attributes are still being removed by the editor, your can update the whitelist of elements.
extended_valid_elements option from
cwp/_config.php, and amend it in your own
_config.php to suit.
use SilverStripe\Forms\HTMLEditor\HTMLEditorConfig; HTMLEditorConfig::get('cwp')->setOption('extended_valid_elements', '<your modified whitelist goes here>');```