Is it possible to override "Redigera länk" that is used for link in TinyMCE?
What I need to do is to - based on page selection - generate all the anchors from the selected page and present them in the dropdown bellow the selected page.
Or create a new plugin for TinyMCE with this functionality? How difficult is it to create a TinyMCE custom dialog in EPiServer context? Any examples?
Mathias Kunto wrote a blog post about something similar (although for CMS 6): http://blog.mathiaskunto.com/2013/12/26/insert-links-to-bookmarks-in-other-episerver-pages/
You might get some pointers from there.