Adding a TinyMCE Plugin

The editor (TinyMCE) has plugins in modules/jrCore/contrib/tinymce/plugins. Don't add yours there: core updates replace that folder. Put each plugin in a module of its own instead.

1. Create a small module (see Creating a Module), such as xxCodeView.
2. Put the plugin's file in the module as tinymce/plugin.min.js. One plugin per module.
3. Register it as an editor button in _init():

jrCore_register_module_feature('jrCore', 'editor_button', 'xxCodeView', 'on');

4. Activate the module, and check Allowed on Profile in its Quota Config for the quotas that should have it.

The editor then loads the plugin for users in those quotas.

Which buttons the editor shows is set in the form_editor.tpl template: one in System Core, one in Site Builder. Override them in your skin as jrCore_form_editor.tpl and jrSiteBuilder_form_editor.tpl, or change them in the Template Editor, and add your plugin to the toolbar there. See Changing a Module's Template.

The Editor Embedded Media module is an example: its tinymce/plugin.min.js adds the Embed Local Media button.