/usr/share/denemo/actions/denemo-modules/helpsystem.scm is in denemo-data 1.1.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | (use-modules (ice-9 q))
#!(define-module (actions denemo-modules helpsystem)
#:export (
Help::RemoveTag
Help::TimedNotice
Help::Push
Help::Pop
)) !#
; This help system is designed to give out messages in the second Denemo status bar.
;; You can push and pop to a message-queue. If you Pop the front message the one before that will appear again
;; Each help message consists of a tag-symbol and a help-string. Only one message of each tag is allowed in the queue. If you push a another message with an existing tag the old message gets deleted.
;; Please stick to the following tag convention
;;; 'timednotice - for a message that will delete itself after a few seconds (you might want use (Help::TimedNotice) anyway)
;;; 'doublestroketemp - for any message that tells the user that a command waits for another keypress, like a duration key.
;;; 'doublestroke - a permanent message that shows the current keybindings or give permanent info about some special mode you might be in.
(define Help::queue (make-q)) ; Prepare the message queue. Only one is used for the entire system.
(define (Q-remove! q obj) ; A function that replaces Guiles q-remove!. Ours works with a pair and only looks for the car.
(set-car! q (filter (lambda (x) (not (equal? (car x) obj))) (car q)))
(sync-q! q))
(define (Help::RemoveTag tag) ; Remove all messages with this 'tag symbol
(Q-remove! Help::queue tag)
(Help::UpdateWriteStatus))
(define (Help::ClearQueue) ; Clear the entire queue
(set! Help::queue (make-q))
(Help::UpdateWriteStatus))
;Take the current front message and display it.
;;Help::UpdateWriteStatus is the only function that accesses the StatusBar.
;;If there is no message left in the queue, disable showing the message area.
(define (Help::UpdateWriteStatus)
(if (q-empty? Help::queue)
(d-WriteStatus)
(d-WriteStatus (cdr (q-front Help::queue)))))
;Push a message to the queue.
;; Also Updates the StatusBar through UpdateWriteStatus
(define (Help::Push pair)
(Help::RemoveTag (car pair)) ; remove all with the same tag first. TODO: evaluate if this is a heavy performance-loss
(q-push! Help::queue pair)
(Help::UpdateWriteStatus))
;Remove the current front message from the queue
;; Also Updates the StatusBar through UpdateWriteStatus
(define (Help::Pop)
(q-pop! Help::queue)
(Help::UpdateWriteStatus))
; Display a message that deletes itself after 2500ms. No tag or Pop needed from the user.
(define (Help::TimedNotice string)
(Help::Push (cons 'timednotice string))
(d-OneShotTimer 2500 "(Help::Pop)"))
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