;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com> ;;; ;;; This file is part of GNU Guix. ;;; ;;; GNU Guix is free software; you can redistribute it and/or modify it ;;; under the terms of the GNU General Public License as published by ;;; the Free Software Foundation; either version 3 of the License, or (at ;;; your option) any later version. ;;; ;;; GNU Guix is distributed in the hope that it will be useful, but ;;; WITHOUT ANY WARRANTY; without even the implied warranty of ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;;; GNU General Public License for more details. ;;; ;;; You should have received a copy of the GNU General Public License ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. (define-module (gnu installer keymap) #:use-module (guix records) #:use-module (sxml match) #:use-module (sxml simple) #:use-module (ice-9 binary-ports) #:use-module (ice-9 ftw) #:use-module (ice-9 match) #:use-module (ice-9 regex) #:export (<x11-keymap-model> x11-keymap-model make-x11-keymap-model x11-keymap-model? x11-keymap-model-name x11-keymap-model-description <x11-keymap-layout> x11-keymap-layout make-x11-keymap-layout x11-keymap-layout? x11-keymap-layout-name x11-keymap-layout-description x11-keymap-layout-variants <x11-keymap-variant> x11-keymap-variant make-x11-keymap-variant x11-keymap-variant? x11-keymap-variant-name x11-keymap-variant-description default-keyboard-model xkb-rules->models+layouts kmscon-update-keymap)) (define-record-type* <x11-keymap-model> x11-keymap-model make-x11-keymap-model x11-keymap-model? (name x11-keymap-model-name) ;string (description x11-keymap-model-description)) ;string (define-record-type* <x11-keymap-layout> x11-keymap-layout make-x11-keymap-layout x11-keymap-layout? (name x11-keymap-layout-name) ;string (description x11-keymap-layout-description) ;string (variants x11-keymap-layout-variants)) ;list of <x11-keymap-variant> (define-record-type* <x11-keymap-variant> x11-keymap-variant make-x11-keymap-variant x11-keymap-variant? (name x11-keymap-variant-name) ;string (description x11-keymap-variant-description)) ;string ;; Assume all modern keyboards have this model. (define default-keyboard-model (make-parameter "pc105")) (define (xkb-rules->models+layouts file) "Parse FILE and return two values, the list of supported X11-KEYMAP-MODEL and X11-KEYMAP-LAYOUT records. FILE is an XML file from the X Keyboard Configuration Database, describing possible XKB configurations." (define (model m) (sxml-match m [(model (configItem (name ,name) (description ,description) . ,rest)) (x11-keymap-model (name name) (description description))])) (define (variant v) (sxml-match v [(variant ;; According to xbd-rules DTD, the definition of a ;; configItem is: <!ELEMENT configItem ;; (name,shortDescription*,description*,vendor?, ;; countryList?,languageList?,hwList?)> ;; ;; shortDescription and description are optional elements ;; but sxml-match does not support default values for ;; elements (only attributes). So to avoid writing as many ;; patterns as existing possibilities, gather all the ;; remaining elements but name in REST-VARIANT. (configItem (name ,name) . ,rest-variant)) (x11-keymap-variant (name name) (description (car (assoc-ref rest-variant 'description))))])) (define (layout l) (sxml-match l [(layout (configItem (name ,name) . ,rest-layout) (variantList ,[variant -> v] ...)) (x11-keymap-layout (name name) (description (car (assoc-ref rest-layout 'description))) (variants (list v ...)))] [(layout (configItem (name ,name) . ,rest-layout)) (x11-keymap-layout (name name) (description (car (assoc-ref rest-layout 'description))) (variants '()))])) (let ((sxml (call-with-input-file file (lambda (port) (xml->sxml port #:trim-whitespace? #t))))) (match (sxml-match sxml [(*TOP* ,pi (xkbConfigRegistry (@ . ,ignored) (modelList ,[model -> m] ...) (layoutList ,[layout -> l] ...) . ,rest)) (list (list m ...) (list l ...))]) ((models layouts) (values models layouts))))) (define (kmscon-update-keymap model layout variant) "Update kmscon keymap with the provided MODEL, LAYOUT and VARIANT." (and=> (getenv "KEYMAP_UPDATE") (lambda (keymap-file) (unless (file-exists? keymap-file) (error "Unable to locate keymap update file")) ;; See file gnu/packages/patches/kmscon-runtime-keymap-switch.patch. ;; This dirty hack makes possible to update kmscon keymap at runtime by ;; writing an X11 keyboard model, layout and variant to a named pipe ;; referred by KEYMAP_UPDATE environment variable. (call-with-output-file keymap-file (lambda (port) (format port model) (put-u8 port 0) (format port layout) (put-u8 port 0) (format port variant) (put-u8 port 0))))))