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-;;; org-mks.el --- Multi-key-selection for Org-mode
-
-;; Copyright (C) 2010 Free Software Foundation, Inc.
-
-;; Author: Carsten Dominik <carsten at orgmode dot org>
-;; Keywords: outlines, hypermedia, calendar, wp
-;; Homepage: http://orgmode.org
-;; Version: 7.4
-;;
-;; 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 <http://www.gnu.org/licenses/>.
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-
-
-;;; Commentary:
-;;
-
-;;; Code:
-
-(require 'org)
-(eval-when-compile
- (require 'cl))
-
-(defun org-mks (table title &optional prompt specials)
- "Select a member of an alist with multiple keys.
-TABLE is the alist which should contain entries where the car is a string.
-There should be two types of entries.
-
-1. prefix descriptions like (\"a\" \"Description\")
- This indicates that `a' is a prefix key for multi-letter selection, and
- that there are entries following with keys like \"ab\", \"ax\"...
-
-2. Selectable members must have more than two elements, with the first
- being the string of keys that lead to selecting it, and the second a
- short description string of the item.
-
-The command will then make a temporary buffer listing all entries
-that can be selected with a single key, and all the single key
-prefixes. When you press the key for a single-letter entry, it is selected.
-When you press a prefix key, the commands (and maybe further prefixes)
-under this key will be shown and offered for selection.
-
-TITLE will be placed over the selection in the temporary buffer,
-PROMPT will be used when prompting for a key. SPECIAL is an alist with
-also (\"key\" \"description\") entries. When one of these is selection,
-only the bare key is returned."
- (setq prompt (or prompt "Select: "))
- (let (tbl orig-table dkey ddesc des-keys allowed-keys
- current prefix rtn re pressed buffer (inhibit-quit t))
- (save-window-excursion
- (setq buffer (org-switch-to-buffer-other-window "*Org Select*"))
- (setq orig-table table)
- (catch 'exit
- (while t
- (erase-buffer)
- (insert title "\n\n")
- (setq tbl table
- des-keys nil
- allowed-keys nil)
- (setq prefix (if current (concat current " ") ""))
- (while tbl
- (cond
- ((and (= 2 (length (car tbl))) (= (length (caar tbl)) 1))
- ;; This is a description on this level
- (setq dkey (caar tbl) ddesc (cadar tbl))
- (pop tbl)
- (push dkey des-keys)
- (push dkey allowed-keys)
- (insert prefix "[" dkey "]" "..." " " ddesc "..." "\n")
- ;; Skip keys which are below this prefix
- (setq re (concat "\\`" (regexp-quote dkey)))
- (while (and tbl (string-match re (caar tbl))) (pop tbl)))
- ((= 2 (length (car tbl)))
- ;; Not yet a usable description, skip it
- )
- (t
- ;; usable entry on this level
- (insert prefix "[" (caar tbl) "]" " " (nth 1 (car tbl)) "\n")
- (push (caar tbl) allowed-keys)
- (pop tbl))))
- (when specials
- (insert "-------------------------------------------------------------------------------\n")
- (let ((sp specials))
- (while sp
- (insert (format "[%s] %s\n"
- (caar sp) (nth 1 (car sp))))
- (push (caar sp) allowed-keys)
- (pop sp))))
- (push "\C-g" allowed-keys)
- (goto-char (point-min))
- (if (not (pos-visible-in-window-p (point-max)))
- (org-fit-window-to-buffer))
- (message prompt)
- (setq pressed (char-to-string (read-char-exclusive)))
- (while (not (member pressed allowed-keys))
- (message "Invalid key `%s'" pressed) (sit-for 1)
- (message prompt)
- (setq pressed (char-to-string (read-char-exclusive))))
- (when (equal pressed "\C-g")
- (kill-buffer buffer)
- (error "Abort"))
- (when (and (not (assoc pressed table))
- (not (member pressed des-keys))
- (assoc pressed specials))
- (throw 'exit (setq rtn pressed)))
- (unless (member pressed des-keys)
- (throw 'exit (setq rtn (rassoc (cdr (assoc pressed table))
- orig-table))))
- (setq current (concat current pressed))
- (setq table (mapcar
- (lambda (x)
- (if (and (> (length (car x)) 1)
- (equal (substring (car x) 0 1) pressed))
- (cons (substring (car x) 1) (cdr x))
- nil))
- table))
- (setq table (remove nil table)))))
- (when buffer (kill-buffer buffer))
- rtn))
-
-(provide 'org-mks)
-
-;; arch-tag: 4ea90d0e-c6e4-4684-bd61-baf878712f9f
-
-;;; org-mks.el ends here