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;;; (acdwm keys) --- key (and button!) binding tools
(import (chicken bitwise)
(chicken irregex)
(chicken memory)
(srfi 1)
(acdwm xlib)
(acdwm util))
;;; Defining bindings
(define-public bindings
(make-parameter '()))
(export keybind keybind?
keybind-keycode keybind-modmask keybind-proc)
(define-record keybind
(setter keycode)
(setter modmask)
(setter proc))
(export mousebind mousebind?
mousebind-button mousebind-modmask mousebind-proc)
(define-record mousebind
(setter button)
(setter modmask)
(setter proc))
(define-public (bind kbd proc #!optional (dpy (get-display)))
;;; Public interface for make-(keybind|mousebind).
(receive (key mods) (parse-bind-description kbd)
(print "binding " kbd " to " proc)
(let ((bind (if (<= 1 key 5)
(make-mousebind key mods proc)
(make-keybind (->keycode key dpy) mods proc))))
(bindings (cons bind (bindings)))
(print "bindings: " (bindings)))))
(define-public (unbind kbd)
(receive (key mods) (parse-bind-description kbd)
#f ; TODO
))
;;; Matching bindings
(define-public (keybind-match? kb ev #!optional (dpy (get-display)))
(and (or (keypress? ev) (keyrelease? ev))
(keybind? kb)
(and (= (xevent-xkey-keycode ev) (keybind-keycode kb))
(= (clean-mask (xevent-xkey-state ev)) (keybind-modmask kb))
(procedure? (keybind-proc kb)))))
(define-public (find-keybinding ev)
(find (lambda (b) (keybind-match? b ev)) (bindings)))
(define-public (mousebind-match? mb ev #!optional (dpy (get-display)))
(and (or (buttonpress? ev) (buttonrelease? ev))
(mousebind? mb)
(and (= (xevent-xbutton-button ev) (mousebind-button mb))
(= (clean-mask (xevent-xbutton-state ev)) (mousebind-modmask mb))
(procedure? (mousebind-proc mb)))))
(define-public (find-mousebinding ev)
(find (lambda (b) (mousebind-match? b ev)) (bindings)))
;;; Numlock & Modkeys
(define numlock
(make-parameter 0))
(define-public (update-numlock-mask #!optional (dpy (get-display)))
(call-with-modifier-keymap
(lambda (mm)
(let ((max-key-per-mod (xmodifierkeymap-max_keypermod mm)))
(do ((i 0 (add1 i)))
((= i 8))
(do ((k 0 (add1 k)))
((= k max-key-per-mod))
(let ((r (pointer-u8-ref ; a KeyBind is an unsigned char
(pointer+ (xmodifierkeymap-modifiermap mm)
(+ i (* max-key-per-mod k))))))
(when (= r (->keycode XK_NUM_LOCK))
(numlock (arithmetic-shift 1 i))))))))))
(define-public (clean-mask mask)
(bitwise-and mask
(bitwise-not (bitwise-ior (numlock) LOCKMASK))
(bitwise-ior SHIFTMASK CONTROLMASK
MOD1MASK MOD2MASK MOD3MASK MOD4MASK MOD5MASK)))
;;; Grabbing input
(define *mods
(begin (update-numlock-mask)
(list 0 LOCKMASK (numlock) (bitwise-ior (numlock) LOCKMASK))))
(define (grab-key key #!optional (dpy (get-display)))
(when (keybind? key)
;; XXX (dprint "grabbing " )
(for-each (lambda (mod)
(xgrabkey dpy
(keybind-keycode key)
(bitwise-ior mod (keybind-modmask key))
(get-root dpy)
TRUE
GRABMODEASYNC
GRABMODEASYNC))
*mods)))
(define (grab-button btn #!optional (dpy (get-display)))
(when (mousebind? btn)
(for-each (lambda (mod)
(xgrabbutton dpy
(mousebind-button btn)
(bitwise-ior mod (mousebind-modmask btn))
(get-root dpy)
TRUE
(bitwise-ior BUTTONPRESSMASK
BUTTONRELEASEMASK
POINTERMOTIONMASK)
GRABMODEASYNC
GRABMODEASYNC
NONE
NONE))
*mods)))
(define-public (grab-input #!optional
(bindings (bindings))
(dpy (get-display)))
(xungrabkey dpy ANYKEY ANYMODIFIER (get-root dpy))
(for-each grab-key (filter keybind? bindings))
(for-each grab-button (filter mousebind? bindings)))
;;; Parsing keybind descriptions
;; `bind' does Emacs-style binding descriptions in DESC. That is, it accepts a
;; string of the form MODS-KEY, where
;; - MODS is one of C, S, M, 1, 2, 3, 4, 5 (M = 1) (case-insensitive)
;; - KEY is one of
;; - - mouse buttons b1, b2, b3, b4, b5 (case-insensitive)
;; - - <D?XK_NAME> is passed through as a symbol
;; - - otherwise it's figured out through the `keycaps' alist
;; NOTE: parse-bind-description returns a KeySym
(define-public (parse-bind-description desc)
(let* ((m (match-bind-desc desc))
(p (cond
((not m) #f)
((irregex-match-substring m 'btn) => parse-button-match)
((irregex-match-substring m 'raw) => parse-raw-match)
((irregex-match-substring m 'key) => parse-key-match)
(else #f))))
(if p
(values p (extract-modmask m))
(values #f #f))))
(define (match-bind-desc desc)
(irregex-match '(: (? (=> mods (+ (or "C-" "S-" "M-"
"1-" "2-" "3-" "4-" "5-"))))
(or
(: (or #\B #\b) (=> btn ("12345")))
(: #\< (=> raw (+ (or alnum #\_))) #\>)
(=> key any)))
desc))
(define (extract-modmask match)
(let ((m (irregex-match-substring match 'mods)))
(irregex-fold "[CSM12345]-"
(lambda (i n s)
(bitwise-ior s (case (string-ref
(irregex-match-substring n) 0)
((#\C #\c) CONTROLMASK)
((#\S #\s) SHIFTMASK)
((#\M #\m #\1) MOD1MASK)
((#\2) MOD2MASK)
((#\3) MOD3MASK)
((#\4) MOD4MASK)
((#\5) MOD5MASK))))
0
(or m ""))))
(define (parse-button-match btn)
(string->number btn))
(define (parse-raw-match raw)
(string->keysym (string-append (if (irregex-match? "^D?XK_.*" raw) ""
"XK_")
(string-upcase raw))))
(define (char<= . cs)
(apply <= (map char->integer cs)))
(define (parse-key-match key)
(let ((ch (string-ref key 0)))
(cond
((char<= #\a ch #\z)
(string->keysym (string-append "XK_LC" (string (char-upcase ch)))))
((char<= #\A ch #\Z)
(string->keysym (string-append "XK_" (string ch))))
((alist-ref ch keycaps))
(else
(let ((ks (char->integer (xstringtokeysym key))))
(if (zero? ks) #f ks))))))
(define (string->keysym str)
(symbol->keysym (string->symbol str)))
(define (string-upcase str)
(list->string (map char-upcase (string->list str))))
(define keycaps
`((#\` . #x60) ; y no XK_GRAVE
(#\1 . ,XK_1)
(#\2 . ,XK_2)
(#\3 . ,XK_3)
(#\4 . ,XK_4)
(#\5 . ,XK_5)
(#\6 . ,XK_6)
(#\7 . ,XK_7)
(#\8 . ,XK_8)
(#\9 . ,XK_9)
(#\0 . ,XK_0)
(#\- . ,XK_MINUS)
(#\= . ,XK_EQUAL)
(#\[ . ,XK_BRACKETLEFT)
(#\] . ,XK_BRACKETRIGHT)
(#\\ . ,XK_BACKSLASH)
(#\; . ,XK_SEMICOLON)
(#\' . #x27) ; y no XK_APOSTROPHE
(#\, . ,XK_COMMA)
(#\. . ,XK_PERIOD)
(#\/ . ,XK_SLASH)
(#\~ . ,XK_ASCIITILDE)
(#\! . ,XK_EXCLAM)
(#\@ . ,XK_AT)
(#\# . ,XK_NUMBERSIGN)
(#\$ . ,XK_DOLLAR)
(#\% . ,XK_PERCENT)
(#\^ . ,XK_ASCIICIRCUM)
(#\& . ,XK_AMPERSAND)
(#\* . ,XK_ASTERISK)
(#\( . ,XK_PARENLEFT)
(#\) . ,XK_PARENRIGHT)
(#\_ . ,XK_UNDERSCORE)
(#\+ . ,XK_PLUS)
(#\{ . ,XK_BRACELEFT)
(#\} . ,XK_BRACERIGHT)
(#\| . ,XK_BAR)
(#\: . ,XK_COLON)
(#\" . ,XK_QUOTEDBL)
(#\< . ,XK_LESS)
(#\> . ,XK_GREATER)
(#\? . ,XK_QUESTION)))
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