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diff --git a/contrib/lisp/org-choose.el b/contrib/lisp/org-choose.el new file mode 100644 index 0000000..3513fe9 --- /dev/null +++ b/contrib/lisp/org-choose.el @@ -0,0 +1,542 @@ +;;;_ org-choose.el --- decision management for org-mode + +;;;_. Headers +;;;_ , License +;; Copyright (C) 2009-2012 Tom Breton (Tehom) + +;; This file is not part of GNU Emacs. + +;; Author: Tom Breton (Tehom) +;; Keywords: outlines, convenience + +;; This file 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 2, or (at your option) +;; any later version. + +;; This file 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; see the file COPYING. If not, write to +;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +;; Boston, MA 02111-1307, USA. + +;;;_ , Commentary: + +; This is code to support decision management. It lets you treat a +; group of sibling items in org-mode as alternatives in a decision. + +; There are no user commands in this file. You use it by: +; * Loading it (manually or by M-x customize-apropos org-modules) + +;; * Setting up at least one set of TODO keywords with the +;; interpretation "choose" by either: + +;; * Using the file directive #+CHOOSE_TODO: + +;; * For instance, "#+CHOOSE_TODO: NO(,-) MAYBE(,0) YES" + +;; * Or by M-x customize-apropos org-todo-keywords + +;; * Operating on single items with the TODO commands. + +;; * Use C-S-right to change the keyword set. Use this to change to +;; the "choose" keyword set that you just defined. + +;; * Use S-right to advance the TODO mark to the next setting. + +;; For "choose", that means you like this alternative more than +;; before. Other alternatives will be automatically demoted to +;; keep your settings consistent. + +;; * Use S-left to demote TODO to the previous setting. + +;; For "choose", that means you don't like this alternative as much +;; as before. Other alternatives will be automatically promoted, +;; if this item was all that was keeping them down. + +;; * All the other TODO commands are available and behave essentially +;; the normal way. + + +;;;_ , Requires + +(require 'org) +;(eval-when-compile +; (require 'cl)) +(require 'cl) + +;;;_. Body +;;;_ , The variables + +(defstruct (org-choose-mark-data. (:type list)) + "The format of an entry in org-choose-mark-data. +Indexes are 0-based or `nil'. +" + keyword + bot-lower-range + top-upper-range + range-length + static-default + all-keywords) + +(defvar org-choose-mark-data + () + "Alist of information for choose marks. + +Each entry is an `org-choose-mark-data.'" ) +(make-variable-buffer-local 'org-choose-mark-data) +;;;_ , For setup +;;;_ . org-choose-filter-one + +(defun org-choose-filter-one (i) + "Return a list of + * a canonized version of the string + * optionally one symbol" + + (if + (not + (string-match "(.*)" i)) + (list i i) + (let* + ( + (end-text (match-beginning 0)) + (vanilla-text (substring i 0 end-text)) + ;;Get the parenthesized part. + (match (match-string 0 i)) + ;;Remove the parentheses. + (args (substring match 1 -1)) + ;;Split it + (arglist + (let + ((arglist-x (org-split-string args ","))) + ;;When string starts with "," `split-string' doesn't + ;;make a first arg, so in that case make one + ;;manually. + (if + (string-match "^," args) + (cons nil arglist-x) + arglist-x))) + (decision-arg (second arglist)) + (type + (cond + ((string= decision-arg "0") + 'default-mark) + ((string= decision-arg "+") + 'top-upper-range) + ((string= decision-arg "-") + 'bot-lower-range) + (t nil))) + (vanilla-arg (first arglist)) + (vanilla-mark + (if vanilla-arg + (concat vanilla-text "("vanilla-arg")") + vanilla-text))) + (if type + (list vanilla-text vanilla-mark type) + (list vanilla-text vanilla-mark))))) + +;;;_ . org-choose-setup-vars +(defun org-choose-setup-vars (bot-lower-range top-upper-range + static-default num-items all-mark-texts) + "Add to org-choose-mark-data according to arguments" + + (let* + ( + (tail + ;;If there's no bot-lower-range or no default, we don't + ;;have ranges. + (cdr + (if (and static-default bot-lower-range) + (let* + ( + ;;If there's no top-upper-range, use the last + ;;item. + (top-upper-range + (or top-upper-range (1- num-items))) + (lower-range-length + (1+ (- static-default bot-lower-range))) + (upper-range-length + (- top-upper-range static-default)) + (range-length + (min upper-range-length lower-range-length))) + + + (make-org-choose-mark-data. + :keyword nil + :bot-lower-range bot-lower-range + :top-upper-range top-upper-range + :range-length range-length + :static-default static-default + :all-keywords all-mark-texts)) + + (make-org-choose-mark-data. + :keyword nil + :bot-lower-range nil + :top-upper-range nil + :range-length nil + :static-default (or static-default 0) + :all-keywords all-mark-texts))))) + + (dolist (text all-mark-texts) + (pushnew (cons text tail) + org-choose-mark-data + :test + #'(lambda (a b) + (equal (car a) (car b))))))) + + + + +;;;_ . org-choose-filter-tail +(defun org-choose-filter-tail (raw) + "Return a translation of RAW to vanilla and set appropriate +buffer-local variables. + +RAW is a list of strings representing the input text of a choose +interpretation." + (let + ((vanilla-list nil) + (all-mark-texts nil) + (index 0) + bot-lower-range top-upper-range range-length static-default) + (dolist (i raw) + (destructuring-bind + (vanilla-text vanilla-mark &optional type) + (org-choose-filter-one i) + (cond + ((eq type 'bot-lower-range) + (setq bot-lower-range index)) + ((eq type 'top-upper-range) + (setq top-upper-range index)) + ((eq type 'default-mark) + (setq static-default index))) + (incf index) + (push vanilla-text all-mark-texts) + (push vanilla-mark vanilla-list))) + + (org-choose-setup-vars bot-lower-range top-upper-range + static-default index (reverse all-mark-texts)) + (nreverse vanilla-list))) + +;;;_ . org-choose-setup-filter + +(defun org-choose-setup-filter (raw) + "A setup filter for choose interpretations." + (when (eq (car raw) 'choose) + (cons + 'choose + (org-choose-filter-tail (cdr raw))))) + +;;;_ . org-choose-conform-after-promotion +(defun org-choose-conform-after-promotion (entry-pos keywords highest-ok-ix) + "Conform the current item after another item was promoted" + + (unless + ;;Skip the entry that triggered this by skipping any entry with + ;;the same starting position. plist uses the start of the + ;;header line as the position, but map no longer does, so we + ;;have to go back to the heading. + (= + (save-excursion + (org-back-to-heading) + (point)) + entry-pos) + (let + ((ix + (org-choose-get-entry-index keywords))) + ;;If the index of the entry exceeds the highest allowable + ;;index, change it to that. + (when (and ix + (> ix highest-ok-ix)) + (org-todo + (nth highest-ok-ix keywords)))))) +;;;_ . org-choose-conform-after-demotion +(defun org-choose-conform-after-demotion (entry-pos keywords + raise-to-ix + old-highest-ok-ix) + "Conform the current item after another item was demoted." + + (unless + ;;Skip the entry that triggered this. + (= + (save-excursion + (org-back-to-heading) + (point)) + entry-pos) + (let + ((ix + (org-choose-get-entry-index keywords))) + ;;If the index of the entry was at or above the old allowable + ;;position, change it to the new mirror position if there is + ;;one. + (when (and + ix + raise-to-ix + (>= ix old-highest-ok-ix)) + (org-todo + (nth raise-to-ix keywords)))))) + +;;;_ , org-choose-keep-sensible (the org-trigger-hook function) +(defun org-choose-keep-sensible (change-plist) + "Bring the other items back into a sensible state after an item's +setting was changed." + (let* + ( (from (plist-get change-plist :from)) + (to (plist-get change-plist :to)) + (entry-pos + (set-marker + (make-marker) + (plist-get change-plist :position))) + (kwd-data + (assoc to org-todo-kwd-alist))) + (when + (eq (nth 1 kwd-data) 'choose) + (let* + ( + (data + (assoc to org-choose-mark-data)) + (keywords + (org-choose-mark-data.-all-keywords data)) + (old-index + (org-choose-get-index-in-keywords + from + keywords)) + (new-index + (org-choose-get-index-in-keywords + to + keywords)) + (highest-ok-ix + (org-choose-highest-other-ok + new-index + data)) + (funcdata + (cond + ;;The entry doesn't participate in conformance, + ;;so give `nil' which does nothing. + ((not highest-ok-ix) nil) + ;;The entry was created or promoted + ((or + (not old-index) + (> new-index old-index)) + (list + #'org-choose-conform-after-promotion + entry-pos keywords + highest-ok-ix)) + (t ;;Otherwise the entry was demoted. + (let + ( + (raise-to-ix + (min + highest-ok-ix + (org-choose-mark-data.-static-default + data))) + (old-highest-ok-ix + (org-choose-highest-other-ok + old-index + data))) + + (list + #'org-choose-conform-after-demotion + entry-pos + keywords + raise-to-ix + old-highest-ok-ix)))))) + + (if funcdata + ;;The funny-looking names are to make variable capture + ;;unlikely. (Poor-man's lexical bindings). + (destructuring-bind (func-d473 . args-46k) funcdata + (let + ((map-over-entries + (org-choose-get-fn-map-group)) + ;;We may call `org-todo', so let various hooks + ;;`nil' so we don't cause loops. + org-after-todo-state-change-hook + org-trigger-hook + org-blocker-hook + org-todo-get-default-hook + ;;Also let this alist `nil' so we don't log + ;;secondary transitions. + org-todo-log-states) + ;;Map over group + (funcall map-over-entries + #'(lambda () + (apply func-d473 args-46k)))))))) + + ;;Remove the marker + (set-marker entry-pos nil))) + + + +;;;_ , Getting the default mark +;;;_ . org-choose-get-index-in-keywords +(defun org-choose-get-index-in-keywords (ix all-keywords) + "Return the index of the current entry." + + (if ix + (position ix all-keywords + :test #'equal))) + +;;;_ . org-choose-get-entry-index +(defun org-choose-get-entry-index (all-keywords) + "Return index of current entry." + + (let* + ((state (org-entry-get (point) "TODO"))) + (org-choose-get-index-in-keywords state all-keywords))) + +;;;_ . org-choose-get-fn-map-group + +(defun org-choose-get-fn-map-group () + "Return a function to map over the group" + + #'(lambda (fn) + (require 'org-agenda) ;; `org-map-entries' seems to need it. + (save-excursion + (unless (org-up-heading-safe) + (error "Choosing is only supported between siblings in a tree, not on top level")) + (let + ((level (org-reduced-level (org-outline-level)))) + (save-restriction + (org-map-entries + fn + (format "LEVEL=%d" level) + 'tree)))))) + +;;;_ . org-choose-get-highest-mark-index + +(defun org-choose-get-highest-mark-index (keywords) + "Get the index of the highest current mark in the group. +If there is none, return 0" + + (let* + ( + ;;Func maps over applicable entries. + (map-over-entries + (org-choose-get-fn-map-group)) + + (indexes-list + (remove nil + (funcall map-over-entries + #'(lambda () + (org-choose-get-entry-index keywords)))))) + (if + indexes-list + (apply #'max indexes-list) + 0))) + + +;;;_ . org-choose-highest-ok + +(defun org-choose-highest-other-ok (ix data) + "Return the highest index that any choose mark can sensibly have, +given that another mark has index IX. +DATA must be a `org-choose-mark-data.'." + + (let + ( + (bot-lower-range + (org-choose-mark-data.-bot-lower-range data)) + (top-upper-range + (org-choose-mark-data.-top-upper-range data)) + (range-length + (org-choose-mark-data.-range-length data))) + (when (and ix bot-lower-range) + (let* + ((delta + (- top-upper-range ix))) + (unless + (< range-length delta) + (+ bot-lower-range delta)))))) + +;;;_ . org-choose-get-default-mark-index + +(defun org-choose-get-default-mark-index (data) + "Return the index of the default mark in a choose interpretation. + +DATA must be a `org-choose-mark-data.'." + + + (or + (let + ((highest-mark-index + (org-choose-get-highest-mark-index + (org-choose-mark-data.-all-keywords data)))) + (org-choose-highest-other-ok + highest-mark-index data)) + (org-choose-mark-data.-static-default data))) + + + +;;;_ . org-choose-get-mark-N +(defun org-choose-get-mark-N (n data) + "Get the text of the nth mark in a choose interpretation." + + (let* + ((l (org-choose-mark-data.-all-keywords data))) + (nth n l))) + +;;;_ . org-choose-get-default-mark + +(defun org-choose-get-default-mark (new-mark old-mark) + "Get the default mark IFF in a choose interpretation. +NEW-MARK and OLD-MARK are the text of the new and old marks." + + (let* + ( + (old-kwd-data + (assoc old-mark org-todo-kwd-alist)) + (new-kwd-data + (assoc new-mark org-todo-kwd-alist)) + (becomes-choose + (and + (or + (not old-kwd-data) + (not + (eq (nth 1 old-kwd-data) 'choose))) + (eq (nth 1 new-kwd-data) 'choose)))) + (when + becomes-choose + (let + ((new-mark-data + (assoc new-mark org-choose-mark-data))) + (if + new-mark + (org-choose-get-mark-N + (org-choose-get-default-mark-index + new-mark-data) + new-mark-data) + (error "Somehow got an unrecognizable mark")))))) + +;;;_ , Setting it all up + +(eval-after-load "org" + '(progn + (add-to-list 'org-todo-setup-filter-hook + #'org-choose-setup-filter) + (add-to-list 'org-todo-get-default-hook + #'org-choose-get-default-mark) + (add-to-list 'org-trigger-hook + #'org-choose-keep-sensible) + (add-to-list 'org-todo-interpretation-widgets + '(:tag "Choose (to record decisions)" choose) + 'append) + )) + + +;;;_. Footers +;;;_ , Provides + +(provide 'org-choose) + +;;;_ * Local emacs vars. +;;;_ + Local variables: +;;;_ + End: + +;;;_ , End + +;;; org-choose.el ends here |