Add custom icons for menu items?

#1

How to add icons for frequently used menu items such as Edit -> Paste from -> BibTeX into the mode icon bar (I hide main toolbar to save space)? I looked into https://www.texmacs.org/tmweb/manual/webman-scheme.en.html but find no clear solutions.

#2

From edit-menu.scm I find

(-> "Paste from"
      (link clipboard-paste-import-menu)

and

(tm-define (clipboard-paste-import-menu)
(clipboard-extern-menu converters-to-special clipboard-paste-import))

But there is no further definition of the 3 actions there.

#3

For LaTeX, I managed to create a keyboard shortcut as follows.

("M-A-v" (clipboard-paste-import "latex" "primary"))

However, replacing latex by bibtex does not work for BibTeX in the internal bibliography database, as the pasted result is a bib-entry rather than db-entry. Something else is unknown here.

#4

You can get the list of converters that appear in the Paste from menu by issuing

(converters-to-special "texmacs-snippet" "-snippet" #t)

There we find that the bibtex format is called tmbib.

The below seems to work in the internal bibliography database:

(clipboard-paste-import "tmbib" "primary")