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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
;;;
;;; 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 newt keymap)
#:use-module (gnu installer keymap)
#:use-module (gnu installer steps)
#:use-module (gnu installer newt page)
#:use-module (guix i18n)
#:use-module (guix records)
#:use-module (newt)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (ice-9 i18n)
#:use-module (ice-9 match)
#:export (run-keymap-page
keyboard-layout->configuration))
(define (run-layout-page layouts layout->text context)
(let ((title (G_ "Layout")))
(run-listbox-selection-page
#:title title
#:info-text
(case context
((param) (G_ "Please choose your keyboard layout. \
It will only be used during the installation process. \
Non-Latin layouts can be toggled with Alt+Shift."))
(else (G_ "Please choose your keyboard layout. \
It will be used during the install process, and for the installed system. \
Non-Latin layouts can be toggled with Alt+Shift. You can switch to a \
different layout at any time from the parameters menu.")))
#:listbox-items layouts
#:listbox-item->text layout->text
#:sort-listbox-items? #f
#:button-text
(case context
((param) (G_ "Continue"))
(else (G_ "Exit")))
#:button-callback-procedure
(case context
((param) (const #f))
(else
(lambda _
(raise
(condition
(&installer-step-abort)))))))))
(define (run-variant-page variants variant->text)
(let ((title (G_ "Variant")))
(run-listbox-selection-page
#:title title
#:info-text (G_ "Please choose a variant for your keyboard layout.")
#:listbox-items variants
#:listbox-item->text variant->text
#:sort-listbox-items? #f
#:button-text (G_ "Back")
#:button-callback-procedure
(lambda _
(raise
(condition
(&installer-step-abort)))))))
(define (sort-layouts layouts)
"Sort LAYOUTS list by putting the US layout ahead and return it."
(define (layout<? layout1 layout2)
(let ((text1 (x11-keymap-layout-description layout1))
(text2 (x11-keymap-layout-description layout2)))
;; XXX: We're calling 'gettext' more than once per item.
(string-locale<? (gettext text1 "xkeyboard-config")
(gettext text2 "xkeyboard-config"))))
(define preferred
;; Two-letter language tag for the preferred keyboard layout.
(or (getenv "LANGUAGE") "us"))
(call-with-values
(lambda ()
(partition
(lambda (layout)
;; The 'synopsis' field is usually a language code (e.g., "en")
;; while the 'name' field is a country code (e.g., "us").
(or (string=? (x11-keymap-layout-name layout) preferred)
(string=? (x11-keymap-layout-synopsis layout) preferred)))
layouts))
(lambda (main others)
(append (sort main layout<?)
(sort others layout<?)))))
(define (add-empty-variant variants)
"Prepend #f to VARIANTS so the user has the option to select no variant.
The resulting layout may be different from all other variants (e.g. for
Azerbaijani)."
(cons #f variants))
(define (sort-variants variants)
"Sort VARIANTS list by putting the international variant ahead and return it."
(call-with-values
(lambda ()
(partition
(lambda (variant)
(and variant
(let ((name (x11-keymap-variant-name variant)))
(string=? name "altgr-intl"))))
variants))
(cut append <> <>)))
(define %non-latin-layouts
;; List of keyboard layouts marked as $nonlatin in xkeyboard-config.
;; See comments in xkeyboard-config file /share/X11/xkb/rules/base.
;; We ignore layouts that support Latin input: "kr"
'("am" "ara" "ben" "bd" "bg" "bt" "by" "cs" "deva" "ge" "gh"
"gr" "guj" "guru" "il" "in" "ir" "iku" "jp" "kan" "kh"
"la" "lao" "lk" "mk" "mm" "mn" "mv" "mal" "olck" "ori" "pk"
"ru" "scc" "sy" "syr" "tel" "th" "tj" "tam" "ua" "uz"
;; The list from xkeyboard-config is incomplete. Add more layouts when
;; noticed:
"et" "kz"))
(define %non-latin-variants
'("cyrillic"))
(define %latin-layout+variants
;; These layout+variant combinations are Latin after all.
'(("ir" "ku")))
(define (toggleable-latin-layout layout variant)
"If LAYOUT is a non-Latin layout, return a new combined layout,
a variant, and options that allow the user to switch between the
non-Latin and the Latin layout. Otherwise, return LAYOUT, VARIANT,
and #f."
(if (and (not (equal? variant "latin"))
(not (member (list layout variant) %latin-layout+variants))
(or (member layout %non-latin-layouts)
(member variant %non-latin-variants)))
(let ((latin-layout (if (equal? variant "azerty") "fr" "us")))
(list
(string-append layout "," latin-layout)
;; Comma to use variant only for non-Latin:
(and variant (string-append variant ","))
"grp:alt_shift_toggle"))
(list layout variant #f)))
(define* (run-keymap-page layouts #:key (context #f))
"Run a page asking the user to select a keyboard layout and variant. LAYOUTS
is a list of supported X11-KEYMAP-LAYOUT. For non-Latin keyboard layouts, a
second layout and toggle options will be added automatically. Return a list
of three elements, the names of the selected keyboard layout, variant and
options."
(define keymap-steps
(list
(installer-step
(id 'layout)
(compute
(lambda _
(run-layout-page
(sort-layouts layouts)
(lambda (layout)
(gettext (x11-keymap-layout-description layout)
"xkeyboard-config"))
context))))
;; Propose the user to select a variant among those supported by the
;; previously selected layout.
(installer-step
(id 'variant)
(compute
(lambda (result _)
(let* ((layout (result-step result 'layout))
(variants (if layout
(x11-keymap-layout-variants layout)
'())))
;; Return #f if the layout does not have any variant.
(and (not (null? variants))
(run-variant-page
(sort-variants (add-empty-variant variants))
(lambda (variant)
(if variant
(gettext (x11-keymap-variant-description variant)
"xkeyboard-config")
;; Text to opt for no variant at all:
(gettext (x11-keymap-layout-description layout)
"xkeyboard-config")))))))))))
(define (format-result layout variant)
(let ((layout (x11-keymap-layout-name layout))
(variant (and=> variant
(lambda (variant)
(gettext (x11-keymap-variant-name variant)
"xkeyboard-config")))))
(toggleable-latin-layout layout variant)))
(let* ((result (run-installer-steps #:steps keymap-steps))
(layout (result-step result 'layout))
(variant (result-step result 'variant)))
(and layout
(format-result layout variant))))
(define (keyboard-layout->configuration keymap)
"Return the operating system configuration snippet to install KEYMAP."
(match keymap
((name #f "grp:alt_shift_toggle")
`((keyboard-layout (keyboard-layout ,name
#:options '("grp:alt_shift_toggle")))))
((name #f _)
`((keyboard-layout (keyboard-layout ,name))))
((name variant "grp:alt_shift_toggle")
`((keyboard-layout (keyboard-layout ,name ,variant
#:options '("grp:alt_shift_toggle")))))
((name variant _)
`((keyboard-layout (keyboard-layout ,name ,variant))))))
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