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80 lines
2.9 KiB
Scheme
80 lines
2.9 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu installer newt timezone)
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#:use-module (gnu installer steps)
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#:use-module (gnu installer timezone)
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#:use-module (gnu installer newt page)
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#:use-module (guix i18n)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (ice-9 match)
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#:use-module (ice-9 receive)
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#:use-module (newt)
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#:export (run-timezone-page))
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;; Information textbox width.
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(define info-textbox-width (make-parameter 40))
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(define (fill-timezones listbox timezones)
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"Fill the given LISTBOX with TIMEZONES. Return an association list
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correlating listbox keys with timezones."
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(map (lambda (timezone)
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(let ((key (append-entry-to-listbox listbox timezone)))
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(cons key timezone)))
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timezones))
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(define (run-timezone-page zonetab)
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"Run a page displaying available timezones, grouped by regions. The user is
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invited to select a timezone. The selected timezone, under Posix format is
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returned."
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(define (all-but-last list)
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(reverse (cdr (reverse list))))
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(define (run-page timezone-tree)
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(define (loop path)
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(let ((timezones (locate-children timezone-tree path)))
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(run-listbox-selection-page
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#:title (G_ "Timezone")
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#:info-text (G_ "Please select a timezone.")
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#:listbox-items timezones
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#:listbox-item->text identity
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#:button-text (if (null? path)
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(G_ "Exit")
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(G_ "Back"))
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#:button-callback-procedure
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(if (null? path)
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(lambda _
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(raise
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(condition
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(&installer-step-abort))))
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(lambda _
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(loop (all-but-last path))))
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#:listbox-callback-procedure
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(lambda (timezone)
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(let* ((timezone* (append path (list timezone)))
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(tz (timezone->posix-tz timezone*)))
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(if (timezone-has-child? timezone-tree timezone*)
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(loop timezone*)
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tz))))))
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(loop '()))
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(let ((timezone-tree (zonetab->timezone-tree zonetab)))
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(run-page timezone-tree)))
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