Filter to paste from Google Doc and keep style (bold, italic, underline).

My frst time posting a plugin.

I'm posting my solution in case it is useful to someone. I had this issue with pasting from googleDocs. And I found someone made a branch of CKEditor in github (13877) which corrects this.

But I needed it to work with my version of CKEditor which I cannot change bacause it is integrated with Prcocesswire CMS.

So I wrote this plugin.

The code is originally from Frederico Knabben, written in ckeditor-dev-t-13877 branch (https://github.com/cksource/ckeditor-dev/tree/t/13877) has been adapted in a plugin.

This filter detects all style that is already in the toolbar. So if underline is missing for example you must add it to the toolbar.
Instruction for Processwire : 

For processwire, you must edit the field that has CKEditor and make sure that :

• copy the plugin folder in site/modules/InputfieldCKEditor/plugins
• ACF is On
• pasteFromGoogleDoc plugin is enabled
• CKEditor toolbar configuration contains Bold, Italic and Underline
  • e.g : Format, Styles, -, Bold, Italic, Underline, -, RemoveFormat
  • if Underline is not in the toolbar for example, it will be bypassed by the filter.