Structure Mode (mobile)

I wish for a mode like Lock mode but instead devoted to editing the structure of a document. At a minimum, when this is activated tapping a node will not activate the keyboard but will activate the action icons on the bottom of the screen.

I want to be able to indent/unindent, move, highlight, delete, cut/paste (nodes), expand/collapse, indent/unindent, but not to type (except when clicking on Move or Search).

As a bonus, I hope such a mode will be useful in enabling multiple selection functionality as tapping on a node will at this time not mean edit/set cursor position, so tap and swipe operations can have a different meaning.