ecf08f0621
dc4e6b1329; Update copyright years in more files64b3777631; Run set-copyright from admin.el8e1c56ae46; Add 2024 to copyright years # Conflicts: # doc/misc/modus-themes.org # doc/misc/texinfo.tex # etc/NEWS # etc/refcards/ru-refcard.tex # etc/themes/modus-operandi-theme.el # etc/themes/modus-themes.el # etc/themes/modus-vivendi-theme.el # lib/alloca.in.h # lib/binary-io.h # lib/c-ctype.h # lib/c-strcasecmp.c # lib/c-strncasecmp.c # lib/careadlinkat.c # lib/cloexec.c # lib/close-stream.c # lib/diffseq.h # lib/dup2.c # lib/filemode.h # lib/fpending.c # lib/fpending.h # lib/fsusage.c # lib/getgroups.c # lib/getloadavg.c # lib/gettext.h # lib/gettime.c # lib/gettimeofday.c # lib/group-member.c # lib/malloc.c # lib/md5-stream.c # lib/md5.c # lib/md5.h # lib/memmem.c # lib/memrchr.c # lib/nanosleep.c # lib/save-cwd.h # lib/sha1.c # lib/sig2str.c # lib/stdlib.in.h # lib/strtoimax.c # lib/strtol.c # lib/strtoll.c # lib/time_r.c # lib/xalloc-oversized.h # lisp/auth-source-pass.el # lisp/emacs-lisp/lisp-mnt.el # lisp/emacs-lisp/timer.el # lisp/info-look.el # lisp/jit-lock.el # lisp/loadhist.el # lisp/mail/rmail.el # lisp/net/ntlm.el # lisp/net/webjump.el # lisp/progmodes/asm-mode.el # lisp/progmodes/project.el # lisp/progmodes/sh-script.el # lisp/textmodes/flyspell.el # lisp/textmodes/reftex-toc.el # lisp/textmodes/reftex.el # lisp/textmodes/tex-mode.el # lisp/url/url-gw.el # m4/alloca.m4 # m4/clock_time.m4 # m4/d-type.m4 # m4/dirent_h.m4 # m4/dup2.m4 # m4/euidaccess.m4 # m4/fchmodat.m4 # m4/filemode.m4 # m4/fsusage.m4 # m4/getgroups.m4 # m4/getloadavg.m4 # m4/getrandom.m4 # m4/gettime.m4 # m4/gettimeofday.m4 # m4/gnulib-common.m4 # m4/group-member.m4 # m4/inttypes.m4 # m4/malloc.m4 # m4/manywarnings.m4 # m4/mempcpy.m4 # m4/memrchr.m4 # m4/mkostemp.m4 # m4/mktime.m4 # m4/nproc.m4 # m4/nstrftime.m4 # m4/pathmax.m4 # m4/pipe2.m4 # m4/pselect.m4 # m4/pthread_sigmask.m4 # m4/readlink.m4 # m4/realloc.m4 # m4/sig2str.m4 # m4/ssize_t.m4 # m4/stat-time.m4 # m4/stddef_h.m4 # m4/stdint.m4 # m4/stdio_h.m4 # m4/stdlib_h.m4 # m4/stpcpy.m4 # m4/strnlen.m4 # m4/strtoimax.m4 # m4/strtoll.m4 # m4/time_h.m4 # m4/timegm.m4 # m4/timer_time.m4 # m4/timespec.m4 # m4/unistd_h.m4 # m4/warnings.m4 # nt/configure.bat # nt/preprep.c # test/lisp/register-tests.el
270 lines
11 KiB
EmacsLisp
270 lines
11 KiB
EmacsLisp
;;; rmc.el --- read from a multiple choice question -*- lexical-binding: t -*-
|
|
|
|
;; Copyright (C) 2016-2024 Free Software Foundation, Inc.
|
|
|
|
;; Maintainer: emacs-devel@gnu.org
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs 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 Emacs 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 Emacs. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;;; Code:
|
|
|
|
(defun rmc--add-key-description (elem)
|
|
(let* ((char (car elem))
|
|
(name (cadr elem))
|
|
(pos (seq-position name char))
|
|
(desc (key-description (char-to-string char)))
|
|
(graphical-terminal
|
|
(display-supports-face-attributes-p
|
|
'(:underline t) (window-frame)))
|
|
(altered-name
|
|
(cond
|
|
;; Not in the name string, or a special character.
|
|
((or (not pos)
|
|
(member desc '("ESC" "TAB" "RET" "DEL" "SPC")))
|
|
(format "%s %s"
|
|
(if graphical-terminal
|
|
(propertize desc 'face 'read-multiple-choice-face)
|
|
(propertize desc 'face 'help-key-binding))
|
|
name))
|
|
;; The prompt character is in the name, so highlight
|
|
;; it on graphical terminals.
|
|
(graphical-terminal
|
|
(setq name (copy-sequence name))
|
|
(put-text-property pos (1+ pos)
|
|
'face 'read-multiple-choice-face
|
|
name)
|
|
name)
|
|
;; And put it in [bracket] on non-graphical terminals.
|
|
(t
|
|
(concat
|
|
(substring name 0 pos)
|
|
"["
|
|
(upcase (substring name pos (1+ pos)))
|
|
"]"
|
|
(substring name (1+ pos)))))))
|
|
(cons char altered-name)))
|
|
|
|
(defun rmc--show-help (prompt help-string show-help choices altered-names)
|
|
(let* ((buf-name (if (stringp show-help)
|
|
show-help
|
|
"*Multiple Choice Help*"))
|
|
(buf (get-buffer-create buf-name)))
|
|
(if (stringp help-string)
|
|
(with-help-window buf
|
|
(with-current-buffer buf
|
|
(insert help-string)))
|
|
(with-help-window buf
|
|
(with-current-buffer buf
|
|
(erase-buffer)
|
|
(pop-to-buffer buf)
|
|
(insert prompt "\n\n")
|
|
(let* ((columns (/ (window-width) 25))
|
|
(fill-column 21)
|
|
(times 0)
|
|
(start (point)))
|
|
(dolist (elem choices)
|
|
(goto-char start)
|
|
(unless (zerop times)
|
|
(if (zerop (mod times columns))
|
|
;; Go to the next "line".
|
|
(goto-char (setq start (point-max)))
|
|
;; Add padding.
|
|
(while (not (eobp))
|
|
(end-of-line)
|
|
(insert (make-string (max (- (* (mod times columns)
|
|
(+ fill-column 4))
|
|
(current-column))
|
|
0)
|
|
?\s))
|
|
(forward-line 1))))
|
|
(setq times (1+ times))
|
|
(let ((text
|
|
(with-temp-buffer
|
|
(insert (format
|
|
"%c: %s\n"
|
|
(car elem)
|
|
(cdr (assq (car elem) altered-names))))
|
|
(fill-region (point-min) (point-max))
|
|
(when (nth 2 elem)
|
|
(let ((start (point)))
|
|
(insert (nth 2 elem))
|
|
(unless (bolp)
|
|
(insert "\n"))
|
|
(fill-region start (point-max))))
|
|
(buffer-string))))
|
|
(goto-char start)
|
|
(dolist (line (split-string text "\n"))
|
|
(end-of-line)
|
|
(if (not (bolp))
|
|
(insert line)
|
|
(insert (make-string
|
|
(max (- (* (mod (1- times) columns)
|
|
(+ fill-column 4))
|
|
(current-column))
|
|
0)
|
|
?\s))
|
|
(insert line "\n"))
|
|
(forward-line 1))))))))
|
|
buf))
|
|
|
|
;;;###autoload
|
|
(defun read-multiple-choice (prompt choices &optional help-string show-help
|
|
long-form)
|
|
"Ask user to select an entry from CHOICES, prompting with PROMPT.
|
|
This function is used to ask the user a question with multiple
|
|
choices.
|
|
|
|
CHOICES should be a list of the form (KEY NAME [DESCRIPTION]).
|
|
KEY is a character the user should type to select the entry.
|
|
NAME is a short name for the entry to be displayed while prompting
|
|
\(if there's no room, it might be shortened).
|
|
DESCRIPTION is an optional longer description of the entry; it will
|
|
be displayed in a help buffer if the user requests more help. This
|
|
help description has a fixed format in columns. For greater
|
|
flexibility, instead of passing a DESCRIPTION, the caller can pass
|
|
the optional argument HELP-STRING. This argument is a string that
|
|
should contain a more detailed description of all of the possible
|
|
choices. `read-multiple-choice' will display that description in a
|
|
help buffer if the user requests that.
|
|
If optional argument SHOW-HELP is non-nil, show the help screen
|
|
immediately, before any user input. If SHOW-HELP is a string,
|
|
use it as the name of the help buffer.
|
|
|
|
This function translates user input into responses by consulting
|
|
the bindings in `query-replace-map'; see the documentation of
|
|
that variable for more information. The relevant bindings for the
|
|
purposes of this function are `recenter', `scroll-up', `scroll-down',
|
|
and `edit'.
|
|
If the user types the `recenter', `scroll-up', or `scroll-down'
|
|
responses, the function performs the requested window recentering or
|
|
scrolling, and then asks the question again. If the user enters `edit',
|
|
the function starts a recursive edit. When the user exit the recursive
|
|
edit, the multiple-choice prompt gains focus again.
|
|
|
|
When `use-dialog-box' is t (the default), and the command using this
|
|
function was invoked via the mouse, this function pops up a GUI dialog
|
|
to collect the user input, but only if Emacs is capable of using GUI
|
|
dialogs. Otherwise, the function will always use text-mode dialogs.
|
|
|
|
The return value is the matching entry from the CHOICES list.
|
|
|
|
If LONG-FORM is non-nil, do a `completing-read' over the NAME elements
|
|
in CHOICES instead. In this case, GUI dialog is not used, regardless
|
|
of the value of `use-dialog-box' and whether the function was invoked
|
|
via a mouse gesture.
|
|
|
|
Usage example:
|
|
|
|
\(read-multiple-choice \"Continue connecting?\"
|
|
\\='((?a \"always\")
|
|
(?s \"session only\")
|
|
(?n \"no\")))"
|
|
(if long-form
|
|
(read-multiple-choice--long-answers prompt choices)
|
|
(read-multiple-choice--short-answers
|
|
prompt choices help-string show-help)))
|
|
|
|
(defun read-multiple-choice--short-answers (prompt choices help-string show-help)
|
|
(let* ((dialog-p (use-dialog-box-p))
|
|
(prompt-choices
|
|
(if (or show-help dialog-p) choices (append choices '((?? "?")))))
|
|
(altered-names (mapcar #'rmc--add-key-description prompt-choices))
|
|
(full-prompt
|
|
(format
|
|
"%s (%s): "
|
|
prompt
|
|
(mapconcat (lambda (e) (cdr e)) altered-names ", ")))
|
|
tchar buf wrong-char answer)
|
|
(save-window-excursion
|
|
(save-excursion
|
|
(if show-help
|
|
(setq buf (rmc--show-help prompt help-string show-help
|
|
choices altered-names)))
|
|
(while (not tchar)
|
|
(unless dialog-p
|
|
(message "%s%s"
|
|
(if wrong-char
|
|
"Invalid choice. "
|
|
"")
|
|
full-prompt))
|
|
(setq tchar
|
|
(if dialog-p
|
|
(x-popup-dialog
|
|
t
|
|
(cons prompt
|
|
(mapcar
|
|
(lambda (elem)
|
|
(cons (capitalize (cadr elem))
|
|
(car elem)))
|
|
prompt-choices)))
|
|
(condition-case nil
|
|
(let ((cursor-in-echo-area t))
|
|
(read-event))
|
|
(error nil))))
|
|
(setq answer (lookup-key query-replace-map (vector tchar) t))
|
|
(setq tchar
|
|
(cond
|
|
((eq answer 'recenter)
|
|
(recenter) t)
|
|
((eq answer 'scroll-up)
|
|
(ignore-errors (scroll-up-command)) t)
|
|
((eq answer 'scroll-down)
|
|
(ignore-errors (scroll-down-command)) t)
|
|
((eq answer 'scroll-other-window)
|
|
(ignore-errors (scroll-other-window)) t)
|
|
((eq answer 'scroll-other-window-down)
|
|
(ignore-errors (scroll-other-window-down)) t)
|
|
((eq answer 'edit)
|
|
(save-match-data
|
|
(save-excursion
|
|
(message "%s"
|
|
(substitute-command-keys
|
|
"Recursive edit; type \\[exit-recursive-edit] to return to help screen"))
|
|
(recursive-edit))))
|
|
(t tchar)))
|
|
(when (eq tchar t)
|
|
(setq wrong-char nil
|
|
tchar nil))
|
|
;; The user has entered an invalid choice, so display the
|
|
;; help messages.
|
|
(when (and (not (eq tchar nil))
|
|
(not (assq tchar choices)))
|
|
(setq wrong-char (not (memq tchar `(?? ,help-char)))
|
|
tchar nil)
|
|
(when wrong-char
|
|
(ding))
|
|
(setq buf (rmc--show-help prompt help-string show-help
|
|
choices altered-names))))))
|
|
(when (buffer-live-p buf)
|
|
(kill-buffer buf))
|
|
(assq tchar choices)))
|
|
|
|
(defun read-multiple-choice--long-answers (prompt choices)
|
|
(let ((answer
|
|
(completing-read
|
|
(concat prompt " ("
|
|
(mapconcat #'identity (mapcar #'cadr choices) "/")
|
|
") ")
|
|
(mapcar #'cadr choices) nil t)))
|
|
(seq-find (lambda (elem)
|
|
(equal (cadr elem) answer))
|
|
choices)))
|
|
|
|
(provide 'rmc)
|
|
|
|
;;; rmc.el ends here
|