Build some extra functions in pdf.js (pdf javascript viewer)

The task is to build extra functions in [login to view URL] (Javascript pdf viewer). The viewer [login to view URL] is an awesome project on Github: [login to view URL] and for a demo: [login to view URL] It need to be possible to (requirements): - Highlight and underline text - Make bookmarks when selecting text and clicking button. Bookmarks need to be inserted in the current index/overview. - Inserting textbox and be able to make hyperlinks in this text to other pdf files. - Offcourse the changes to the pdf needs to get saved in a way (by example in an other file on the server or in the mysql database). So that the next time the pdf opens the changes (highlights,underlines,textarea's and bookmarks) are still there. Current situation: - [login to view URL] is used as pdf viewer in a file manager with his standard functions - [login to view URL] opens a pdf file through: [login to view URL]$[login to view URL] Desired situation (also required): - [login to view URL] is an PDF editor that meet the requirements as mentioned above. - Has the same 'look and feel' as in the current situation - Is still userfriendly as in the current situation - [login to view URL] is used as pdf viewer in a file manager with his standard functions - [login to view URL] opens a pdf file through: [login to view URL]$[login to view URL] and load besides that the earlier modifications according to that specific file (mention that it has to work with several pdf files!)