Keymap on region only updating from mouse click

Question

I have defined some keymaps on org-mode src-blocks. If I click in the block with a mouse, I see the keymap is changed, e.g. the menu items change, and the new keybindings are active. However, if I use C-n or C-p to get into the block, the keymap is not changed. However, as soon as I edit the block, the keymap becomes active. The keymaps are added during font-lock via:

(add-text-properties
             beg end `(local-map ,some-key-map))))

inside a function that is added to org-font-lock-hook.

Is there something different about mouse motion and cursor motion that would cause this difference?

Answer 1

What is probably happening is just that the menu is not re-computed.

You need to call force-mode-line-update after the cursor moves into (or out-of) the text bloc where you applied that local-map property. You could do that by using something like

(cursor-sensor-mode 1)
...
(add-text-properties
 beg end `(local-map ,some-key-map
           cursor-sensor-functions my-csf-menu-update))))

along with

(defun my-csf-menu-update (&rest _)
  (force-mode-line-update))