guile-swayer/modules/which-key.scm

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(define-module (modules which-key)
#:use-module (swayipc)
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#:use-module (modules general)
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#:use-module (ice-9 hash-table)
#:use-module (srfi srfi-18)
#:export (which-key-init
which-key-configure
which-key-delay-idle
which-key-display-keybindings-hook
which-key-event-counter
which-key-hide-keybindings-hook))
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;; idle delay before showing
(define which-key-delay-idle 1.5)
;; used to keep track of how many events occured
(define which-key-event-counter 0)
;; used to keep track of whether the which-key is active or not
(define which-key-active #f)
(define* (get-submap-keybindings submap #:optional (keybindings general-keybindings))
"Return all provided submap keybindings.
Returned value is a list of keybindings. Each is a list
that contains the values: (CHORD KEY EXP WK SUBMAP)."
(filter (lambda (ls) (equal? (list-ref ls 4) submap))
(hash-map->list cons keybindings)))
;; emitted on submap change.
;; Parameters:
;; - arg1: submap.
;; - arg2: available keybindings.
(define which-key-display-keybindings-hook
(make-hook 2))
;; emitted on submap change to default.
;; Parameters:
;; - arg1: submap.
(define which-key-hide-keybindings-hook
(make-hook 1))
(define (mode-changed mode-event)
(let ((mode (sway-mode-event-change mode-event))
(counter (+ 1 which-key-event-counter)))
(set! which-key-event-counter counter)
(if (equal? "default" mode)
(begin
(set! which-key-active #f)
(run-hook which-key-hide-keybindings-hook mode))
(thread-start!
(make-thread
(lambda ()
(unless which-key-active
(usleep (inexact->exact (* 1000000 which-key-delay-idle))))
(when (equal? which-key-event-counter counter)
(set! which-key-active #t)
(run-hook which-key-display-keybindings-hook mode (get-submap-keybindings mode)))))))))
(define* (which-key-configure #:key delay-idle)
"Configure which-key
Parameters:
- delay-idle: the idle delay before showing the which key menu."
(when delay-idle
(set! which-key-delay-idle delay-idle)))
(define (which-key-init)
"Initialize the which-key module."
(add-hook! sway-mode-hook mode-changed)
(display "starting which-key\n"))