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authorLuke Shumaker <LukeShu@sbcglobal.net>2011-04-13 23:20:15 -0400
committerLuke Shumaker <LukeShu@sbcglobal.net>2011-04-13 23:20:15 -0400
commitf7464fdd2e33e5dc6c159a4adc8f53902e6d4511 (patch)
treeb1d65db982af54cc2088de3228174c4ea710c2f4 /.emacs.d/org-7.4/contrib/lisp/org-depend.el
Initial commit of Luke Shumaker's "dot-files".
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+;;; org-depend.el --- TODO dependencies for Org-mode
+;; Copyright (C) 2008 Free Software Foundation, Inc.
+;;
+;; Author: Carsten Dominik <carsten at orgmode dot org>
+;; Keywords: outlines, hypermedia, calendar, wp
+;; Homepage: http://orgmode.org
+;; Version: 0.08
+;;
+;; This file is not part of GNU Emacs.
+;;
+;; 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 3, 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; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;;; Commentary:
+;;
+;; WARNING: This file is just a PROOF OF CONCEPT, not a supported part
+;; of Org-mode.
+;;
+;; This is an example implementation of TODO dependencies in Org-mode.
+;; It uses the new hooks in version 5.13 of Org-mode,
+;; `org-trigger-hook' and `org-blocker-hook'.
+;;
+;; It implements the following:
+;;
+;; Triggering
+;; ----------
+;;
+;; 1) If an entry contains a TRIGGER property that contains the string
+;; "chain-siblings(KEYWORD)", then switching that entry to DONE does
+;; do the following:
+;; - The sibling following this entry switched to todo-state KEYWORD.
+;; - The sibling also gets a TRIGGER property "chain-sibling(KEYWORD)",
+;; property, to make sure that, when *it* is DONE, the chain will
+;; continue.
+;;
+;; 2) If an entry contains a TRIGGER property that contains the string
+;; "chain-siblings-scheduled", then switching that entry to DONE does
+;; the following actions, similarly to "chain-siblings(KEYWORD)":
+;; - The sibling receives the same scheduled time as the entry
+;; marked as DONE (or, in the case, in which there is no scheduled
+;; time, the sibling does not get any either).
+;; - The sibling also gets the same TRIGGER property
+;; "chain-siblings-scheduled", so the chain can continue.
+;;
+;; 3) If the TRIGGER property contains any other words like
+;; XYZ(KEYWORD), these are treated as entry id's with keywords. That
+;; means Org-mode will search for an entry with the ID property XYZ
+;; and switch that entry to KEYWORD as well.
+;;
+;; Blocking
+;; --------
+;;
+;; 1) If an entry contains a BLOCKER property that contains the word
+;; "previous-sibling", the sibling above the current entry is
+;; checked when you try to mark it DONE. If it is still in a TODO
+;; state, the current state change is blocked.
+;;
+;; 2) If the BLOCKER property contains any other words, these are
+;; treated as entry id's. That means Org-mode will search for an
+;; entry with the ID property exactly equal to this word. If any
+;; of these entries is not yet marked DONE, the current state change
+;; will be blocked.
+;;
+;; 3) Whenever a state change is blocked, an org-mark is pushed, so that
+;; you can find the offending entry with `C-c &'.
+;;
+;;; Example:
+;;
+;; When trying this example, make sure that the settings for TODO keywords
+;; have been activated, i.e. include the following line and press C-c C-c
+;; on the line before working with the example:
+;;
+;; #+TYP_TODO: TODO NEXT | DONE
+;;
+;; * TODO Win a million in Las Vegas
+;; The "third" TODO (see above) cannot become a TODO without this money.
+;;
+;; :PROPERTIES:
+;; :ID: I-cannot-do-it-without-money
+;; :END:
+;;
+;; * Do this by doing a chain of TODO's
+;; ** NEXT This is the first in this chain
+;; :PROPERTIES:
+;; :TRIGGER: chain-siblings(NEXT)
+;; :END:
+;;
+;; ** This is the second in this chain
+;;
+;; ** This is the third in this chain
+;; :PROPERTIES:
+;; :BLOCKER: I-cannot-do-it-without-money
+;; :END:
+;;
+;; ** This is the forth in this chain
+;; When this is DONE, we will also trigger entry XYZ-is-my-id
+;; :PROPERTIES:
+;; :TRIGGER: XYZ-is-my-id(TODO)
+;; :END:
+;;
+;; ** This is the fifth in this chain
+;;
+;; * Start writing report
+;; :PROPERTIES:
+;; :ID: XYZ-is-my-id
+;; :END:
+;;
+;;
+
+(require 'org)
+
+(defcustom org-depend-tag-blocked t
+ "Whether to indicate blocked TODO items by a special tag."
+ :group 'org
+ :type 'boolean)
+
+(defmacro org-depend-act-on-sibling (trigger-val &rest rest)
+ "Perform a set of actions on the next sibling, if it exists,
+copying the sibling spec TRIGGER-VAL to the next sibling."
+ `(catch 'exit
+ (save-excursion
+ (goto-char pos)
+ ;; find the sibling, exit if no more siblings
+ (condition-case nil
+ (outline-forward-same-level 1)
+ (error (throw 'exit t)))
+ ;; mark the sibling TODO
+ ,@rest
+ ;; make sure the sibling will continue the chain
+ (org-entry-add-to-multivalued-property
+ nil "TRIGGER" ,trigger-val))))
+
+(defun org-depend-trigger-todo (change-plist)
+ "Trigger new TODO entries after the current is switched to DONE.
+This does two different kinds of triggers:
+
+- If the current entry contains a TRIGGER property that contains
+ \"chain-siblings(KEYWORD)\", it goes to the next sibling, marks it
+ KEYWORD and also installs the \"chain-sibling\" trigger to continue
+ the chain.
+- If the current entry contains a TRIGGER property that contains
+ \"chain-siblings-scheduled\", we go to the next sibling and copy
+ the scheduled time from the current task, also installing the property
+ in the sibling.
+- Any other word (space-separated) like XYZ(KEYWORD) in the TRIGGER
+ property is seen as an entry id. Org-mode finds the entry with the
+ corresponding ID property and switches it to the state TODO as well."
+
+ ;; Get information from the plist
+ (let* ((type (plist-get change-plist :type))
+ (pos (plist-get change-plist :position))
+ (from (plist-get change-plist :from))
+ (to (plist-get change-plist :to))
+ (org-log-done nil) ; IMPROTANT!: no logging during automatic trigger!
+ trigger triggers tr p1 kwd)
+ (catch 'return
+ (unless (eq type 'todo-state-change)
+ ;; We are only handling todo-state-change....
+ (throw 'return t))
+ (unless (and (member from org-not-done-keywords)
+ (member to org-done-keywords))
+ ;; This is not a change from TODO to DONE, ignore it
+ (throw 'return t))
+
+ ;; OK, we just switched from a TODO state to a DONE state
+ ;; Lets see if this entry has a TRIGGER property.
+ ;; If yes, split it up on whitespace.
+ (setq trigger (org-entry-get pos "TRIGGER")
+ triggers (and trigger (org-split-string trigger "[ \t]+")))
+
+ ;; Go through all the triggers
+ (while (setq tr (pop triggers))
+ (cond
+ ((string-match "\\`chain-siblings(\\(.*?\\))\\'" tr)
+ ;; This is a TODO chain of siblings
+ (setq kwd (match-string 1 tr))
+ (org-depend-act-on-sibling (format "chain-siblings(%s)" kwd)
+ (org-todo kwd)))
+
+ ((string-match "\\`\\(\\S-+\\)(\\(.*?\\))\\'" tr)
+ ;; This seems to be ENTRY_ID(KEYWORD)
+ (setq id (match-string 1 tr)
+ kwd (match-string 2 tr)
+ p1 (org-find-entry-with-id id))
+ (when p1
+ ;; there is an entry with this ID, mark it TODO
+ (save-excursion
+ (goto-char p1)
+ (org-todo kwd))))
+ ((string-match "\\`chain-siblings-scheduled\\'" tr)
+ (let ((time (org-get-scheduled-time pos)))
+ (when time
+ (org-depend-act-on-sibling
+ "chain-siblings-scheduled"
+ (org-schedule nil time))))))))))
+
+(defun org-depend-block-todo (change-plist)
+ "Block turning an entry into a TODO.
+This checks for a BLOCKER property in an entry and checks
+all the entries listed there. If any of them is not done,
+block changing the current entry into a TODO entry. If the property contains
+the word \"previous-sibling\", the sibling above the current entry is checked.
+Any other words are treated as entry id's. If an entry exists with the
+this ID property, that entry is also checked."
+ ;; Get information from the plist
+ (let* ((type (plist-get change-plist :type))
+ (pos (plist-get change-plist :position))
+ (from (plist-get change-plist :from))
+ (to (plist-get change-plist :to))
+ (org-log-done nil) ; IMPROTANT!: no logging during automatic trigger
+ blocker blockers bl p1
+ (proceed-p
+ (catch 'return
+ ;; If this is not a todo state change, or if this entry is
+ ;; DONE, do not block
+ (when (or (not (eq type 'todo-state-change))
+ (member from (cons 'done org-done-keywords))
+ (member to (cons 'todo org-not-done-keywords))
+ (not to))
+ (throw 'return t))
+
+ ;; OK, the plan is to switch from nothing to TODO
+ ;; Lets see if we will allow it. Find the BLOCKER property
+ ;; and split it on whitespace.
+ (setq blocker (org-entry-get pos "BLOCKER")
+ blockers (and blocker (org-split-string blocker "[ \t]+")))
+
+ ;; go through all the blockers
+ (while (setq bl (pop blockers))
+ (cond
+ ((equal bl "previous-sibling")
+ ;; the sibling is required to be DONE.
+ (catch 'ignore
+ (save-excursion
+ (goto-char pos)
+ ;; find the older sibling, exit if no more siblings
+ (condition-case nil
+ (outline-backward-same-level 1)
+ (error (throw 'ignore t)))
+ ;; Check if this entry is not yet done and block
+ (unless (org-entry-is-done-p)
+ ;; return nil, to indicate that we block the change!
+ (org-mark-ring-push)
+ (throw 'return nil)))))
+
+ ((setq p1 (org-find-entry-with-id bl))
+ ;; there is an entry with this ID, check it out
+ (save-excursion
+ (goto-char p1)
+ (unless (org-entry-is-done-p)
+ ;; return nil, to indicate that we block the change!
+ (org-mark-ring-push)
+ (throw 'return nil))))))
+ t ; return t to indicate that we are not blocking
+ )))
+ (when org-depend-tag-blocked
+ (org-toggle-tag "blocked" (if proceed-p 'off 'on)))
+
+ proceed-p))
+
+(add-hook 'org-trigger-hook 'org-depend-trigger-todo)
+(add-hook 'org-blocker-hook 'org-depend-block-todo)
+
+(provide 'org-depend)
+
+;;; org-depend.el ends here