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138 lines
4.8 KiB
EmacsLisp
138 lines
4.8 KiB
EmacsLisp
;;; org-mks.el --- Multi-key-selection for Org-mode
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;; Copyright (C) 2010 Free Software Foundation, Inc.
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;; Author: Carsten Dominik <carsten at orgmode dot org>
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;; Keywords: outlines, hypermedia, calendar, wp
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;; Homepage: http://orgmode.org
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;; Version: 7.01trans
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;;
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;; This file is part of GNU Emacs.
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;;
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it 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
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; Commentary:
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;;
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;;; Code:
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(require 'org)
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(eval-when-compile
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(require 'cl))
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(defun org-mks (table title &optional prompt specials)
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"Select a member of an alist with multiple keys.
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TABLE is the alist which should contain entries where the car is a string.
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There should be two types of entries.
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1. prefix descriptions like (\"a\" \"Description\")
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This indicates that `a' is a prefix key for multi-letter selection, and
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that there are entries following with keys like \"ab\", \"ax\"...
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2. Selectable members must have more than two elements, with the first
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being the string of keys that lead to selecting it, and the second a
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short description string of the item.
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The command will then make a temporary buffer listing all entries
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that can be selected with a single key, and all the single key
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prefixes. When you press the key for a single-letter entry, it is selected.
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When you press a prefix key, the commands (and maybe further prefixes)
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under this key will be shown and offered for selection.
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TITLE will be placed over the selection in the temporary buffer,
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PROMPT will be used when prompting for a key. SPECIAL is an alist with
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also (\"key\" \"description\") entries. When one of these is selection,
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only the bare key is returned."
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(setq prompt (or prompt "Select: "))
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(let (tbl orig-table dkey ddesc des-keys allowed-keys
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current prefix rtn re pressed buffer (inhibit-quit t))
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(save-window-excursion
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(setq buffer (org-switch-to-buffer-other-window "*Org Select*"))
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(setq orig-table table)
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(catch 'exit
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(while t
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(erase-buffer)
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(insert title "\n\n")
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(setq tbl table
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des-keys nil
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allowed-keys nil)
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(setq prefix (if current (concat current " ") ""))
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(while tbl
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(cond
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((and (= 2 (length (car tbl))) (= (length (caar tbl)) 1))
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;; This is a description on this level
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(setq dkey (caar tbl) ddesc (cadar tbl))
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(pop tbl)
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(push dkey des-keys)
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(push dkey allowed-keys)
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(insert prefix "[" dkey "]" "..." " " ddesc "..." "\n")
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;; Skip keys which are below this prefix
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(setq re (concat "\\`" (regexp-quote dkey)))
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(while (and tbl (string-match re (caar tbl))) (pop tbl)))
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((= 2 (length (car tbl)))
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;; Not yet a usable description, skip it
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)
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(t
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;; usable entry on this level
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(insert prefix "[" (caar tbl) "]" " " (nth 1 (car tbl)) "\n")
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(push (caar tbl) allowed-keys)
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(pop tbl))))
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(when specials
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(insert "-------------------------------------------------------------------------------\n")
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(let ((sp specials))
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(while sp
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(insert (format "[%s] %s\n"
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(caar sp) (nth 1 (car sp))))
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(push (caar sp) allowed-keys)
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(pop sp))))
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(push "\C-g" allowed-keys)
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(goto-char (point-min))
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(if (not (pos-visible-in-window-p (point-max)))
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(org-fit-window-to-buffer))
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(message prompt)
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(setq pressed (char-to-string (read-char-exclusive)))
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(while (not (member pressed allowed-keys))
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(message "Invalid key `%s'" pressed) (sit-for 1)
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(message prompt)
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(setq pressed (char-to-string (read-char-exclusive))))
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(when (equal pressed "\C-g")
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(kill-buffer buffer)
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(error "Abort"))
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(when (and (not (assoc pressed table))
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(not (member pressed des-keys))
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(assoc pressed specials))
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(throw 'exit (setq rtn pressed)))
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(unless (member pressed des-keys)
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(throw 'exit (setq rtn (rassoc (cdr (assoc pressed table))
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orig-table))))
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(setq current (concat current pressed))
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(setq table (mapcar
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(lambda (x)
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(if (and (> (length (car x)) 1)
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(equal (substring (car x) 0 1) pressed))
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(cons (substring (car x) 1) (cdr x))
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nil))
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table))
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(setq table (remove nil table)))))
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(when buffer (kill-buffer buffer))
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rtn))
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(provide 'org-mks)
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;; arch-tag: 4ea90d0e-c6e4-4684-bd61-baf878712f9f
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;;; org-mks.el ends here
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