lisp/org-habit.el

   1 ;;; org-habit.el --- The habit tracking code for Org-mode
   2
   3 ;; Copyright (C) 2009 Free Software Foundation, Inc.
   4
   5 ;; Author: John Wiegley <johnw at gnu dot org>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 6.33trans
   9 ;;
  10 ;; This file is part of GNU Emacs.
  11 ;;
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  25 ;;
  26 ;;; Commentary:
  27
  28 ;; This file contains the habit tracking code for Org-mode
  29
  30 (require 'org)
  31 (require 'org-agenda)
  32 (eval-when-compile
  33   (require 'cl)
  34   (require 'calendar))
  35
  36 (defgroup org-habit nil
  37   "Options concerning habit tracking in Org-mode."
  38   :tag "Org Habit"
  39   :group 'org-progress)
  40
  41 (defcustom org-habit-graph-column 40
  42   "The absolute column at which to insert habit consistency graphs.
  43 Note that consistency graphs will overwrite anything else in the buffer."
  44   :group 'org-habit
  45   :type 'integer)
  46
  47 (defcustom org-habit-preceding-days 21
  48   "Number of days before today to appear in consistency graphs."
  49   :group 'org-habit
  50   :type 'integer)
  51
  52 (defcustom org-habit-following-days 7
  53   "Number of days after today to appear in consistency graphs."
  54   :group 'org-habit
  55   :type 'integer)
  56
  57 (defcustom org-habit-show-habits t
  58   "If non-nil, show habits in agenda buffers."
  59   :group 'org-habit
  60   :type 'boolean)
  61
  62 (defcustom org-habit-show-habits-only-for-today t
  63   "If non-nil, only show habits on today's agenda, and not for future days.
  64 Note that even when shown for future days, the graph is always
  65 relative to the current effective date."
  66   :group 'org-habit
  67   :type 'boolean)
  68
  69 (defface org-habit-clear-face
  70   '((((background light)) (:background "slateblue"))
  71     (((background dark)) (:background "blue")))
  72   "Face for days on which a task shouldn't be done yet."
  73   :group 'org-habit
  74   :group 'org-faces)
  75 (defface org-habit-clear-future-face
  76   '((((background light)) (:background "powderblue"))
  77     (((background dark)) (:background "midnightblue")))
  78   "Face for future days on which a task shouldn't be done yet."
  79   :group 'org-habit
  80   :group 'org-faces)
  81
  82 (defface org-habit-ready-face
  83   '((((background light)) (:background "green"))
  84     (((background dark)) (:background "forestgreen")))
  85   "Face for days on which a task should start to be done."
  86   :group 'org-habit
  87   :group 'org-faces)
  88 (defface org-habit-ready-future-face
  89   '((((background light)) (:background "palegreen"))
  90     (((background dark)) (:background "darkgreen")))
  91   "Face for days on which a task should start to be done."
  92   :group 'org-habit
  93   :group 'org-faces)
  94
  95 (defface org-habit-alert-face
  96   '((((background light)) (:background "yellow"))
  97     (((background dark)) (:background "gold")))
  98   "Face for days on which a task is due."
  99   :group 'org-habit
 100   :group 'org-faces)
 101 (defface org-habit-alert-future-face
 102   '((((background light)) (:background "palegoldenrod"))
 103     (((background dark)) (:background "darkgoldenrod")))
 104   "Face for days on which a task is due."
 105   :group 'org-habit
 106   :group 'org-faces)
 107
 108 (defface org-habit-overdue-face
 109   '((((background light)) (:background "red"))
 110     (((background dark)) (:background "firebrick")))
 111   "Face for days on which a task is overdue."
 112   :group 'org-habit
 113   :group 'org-faces)
 114 (defface org-habit-overdue-future-face
 115   '((((background light)) (:background "mistyrose"))
 116     (((background dark)) (:background "darkred")))
 117   "Face for days on which a task is overdue."
 118   :group 'org-habit
 119   :group 'org-faces)
 120
 121 (defun org-habit-duration-to-days (ts)
 122   (if (string-match "\\([0-9]+\\)\\([dwmy]\\)" ts)
 123       ;; lead time is specified.
 124       (floor (* (string-to-number (match-string 1 ts))
 125                 (cdr (assoc (match-string 2 ts)
 126                             '(("d" . 1)    ("w" . 7)
 127                               ("m" . 30.4) ("y" . 365.25))))))
 128     (error "Invalid duration string: %s" ts)))
 129
 130 (defun org-is-habit-p (&optional pom)
 131   (string= "habit" (org-entry-get (or pom (point)) "STYLE")))
 132
 133 (defun org-habit-parse-todo (&optional pom)
 134   "Parse the TODO surrounding point for its habit-related data.
 135 Returns a list with the following elements:
 136
 137   0: Scheduled date for the habit (may be in the past)
 138   1: \".+\"-style repeater for the schedule, in days
 139   2: Optional deadline (nil if not present)
 140   3: If deadline, the repeater for the deadline, otherwise nil
 141   4: A list of all the past dates this todo was mark closed
 142
 143 This list represents a \"habit\" for the rest of this module."
 144   (save-excursion
 145     (if pom (goto-char pom))
 146     (assert (org-is-habit-p (point)))
 147     (let* ((scheduled (org-get-scheduled-time (point)))
 148            (scheduled-repeat (org-get-repeat org-scheduled-string))
 149            (sr-days (org-habit-duration-to-days scheduled-repeat))
 150            (end (org-entry-end-position))
 151            (habit-entry (org-no-properties (nth 5 (org-heading-components))))
 152            closed-dates deadline dr-days)
 153       (if scheduled
 154           (setq scheduled (time-to-days scheduled))
 155         (error "Habit %s has no scheduled date" habit-entry))
 156       (unless scheduled-repeat
 157         (error "Habit %s has no scheduled repeat period" habit-entry))
 158       (unless (> sr-days 0)
 159         (error "Habit %s scheduled repeat period is less than 1d" habit-entry))
 160       (when (string-match "/\\([0-9]+[dwmy]\\)" scheduled-repeat)
 161         (setq dr-days (org-habit-duration-to-days
 162                        (match-string-no-properties 1 scheduled-repeat)))
 163         (if (<= dr-days sr-days)
 164             (error "Habit %s deadline repeat period is less than or equal to scheduled (%s)"
 165                    habit-entry scheduled-repeat))
 166         (setq deadline (+ scheduled (- dr-days sr-days))))
 167       (org-back-to-heading t)
 168       (while (re-search-forward "- State \"DONE\".*\\[\\([^]]+\\)\\]" end t)
 169         (push (time-to-days
 170                (org-time-string-to-time (match-string-no-properties 1)))
 171               closed-dates))
 172       (list scheduled sr-days deadline dr-days closed-dates))))
 173
 174 (defsubst org-habit-scheduled (habit)
 175   (nth 0 habit))
 176 (defsubst org-habit-scheduled-repeat (habit)
 177   (nth 1 habit))
 178 (defsubst org-habit-deadline (habit)
 179   (let ((deadline (nth 2 habit)))
 180     (or deadline
 181         (+ (org-habit-scheduled habit)
 182            (1- (org-habit-scheduled-repeat habit))))))
 183 (defsubst org-habit-deadline-repeat (habit)
 184   (or (nth 3 habit)
 185       (org-habit-scheduled-repeat habit)))
 186 (defsubst org-habit-done-dates (habit)
 187   (nth 4 habit))
 188
 189 (defsubst org-habit-get-priority (habit &optional moment)
 190   "Determine the relative priority of a habit.
 191 This must take into account not just urgency, but consistency as well."
 192   (let ((pri 1000)
 193         (now (time-to-days
 194               (or moment
 195                   (time-subtract (current-time)
 196                                  (list 0 (* 3600 org-extend-today-until) 0)))))
 197         (scheduled (org-habit-scheduled habit))
 198         (deadline (org-habit-deadline habit)))
 199     ;; add 10 for every day past the scheduled date, and subtract for every
 200     ;; day before it
 201     (setq pri (+ pri (* (- now scheduled) 10)))
 202     ;; add 50 if the deadline is today
 203     (if (and (/= scheduled deadline)
 204              (= now deadline))
 205         (setq pri (+ pri 50)))
 206     ;; add 100 for every day beyond the deadline date, and subtract 10 for
 207     ;; every day before it
 208     (let ((slip (- now (1- deadline))))
 209       (if (> slip 0)
 210           (setq pri (+ pri (* slip 100)))
 211         (setq pri (+ pri (* slip 10)))))
 212     pri))
 213
 214 (defun org-habit-get-faces (habit &optional now-days scheduled-days donep)
 215   "Return faces for HABIT relative to NOW-DAYS and SCHEDULED-DAYS.
 216 NOW-DAYS defaults to the current time's days-past-the-epoch if nil.
 217 SCHEDULED-DAYS defaults to the habit's actual scheduled days if nil.
 218
 219 Habits are assigned colors on the following basis:
 220   Blue      Task is before the scheduled date.
 221   Green     Task is on or after scheduled date, but before the
 222             end of the schedule's repeat period.
 223   Yellow    If the task has a deadline, then it is after schedule's
 224             repeat period, but before the deadline.
 225   Orange    The task has reached the deadline day, or if there is
 226             no deadline, the end of the schedule's repeat period.
 227   Red       The task has gone beyond the deadline day or the
 228             schedule's repeat period."
 229   (let* ((scheduled (or scheduled-days (org-habit-scheduled habit)))
 230          (s-repeat (org-habit-scheduled-repeat habit))
 231          (scheduled-end (+ scheduled (1- s-repeat)))
 232          (d-repeat (org-habit-deadline-repeat habit))
 233          (deadline (if scheduled-days
 234                        (+ scheduled-days (- d-repeat s-repeat))
 235                      (org-habit-deadline habit)))
 236          (m-days (or now-days (time-to-days (current-time)))))
 237     (cond
 238      ((< m-days scheduled)
 239       '(org-habit-clear-face . org-habit-clear-future-face))
 240      ((< m-days deadline)
 241       '(org-habit-ready-face . org-habit-ready-future-face))
 242      ((= m-days deadline)
 243       (if donep
 244           '(org-habit-ready-face . org-habit-ready-future-face)
 245         '(org-habit-alert-face . org-habit-alert-future-face)))
 246      (t
 247       '(org-habit-overdue-face . org-habit-overdue-future-face)))))
 248
 249 (defun org-habit-build-graph (habit starting current ending)
 250   "Build a graph for the given HABIT, from STARTING to ENDING.
 251 CURRENT gives the current time between STARTING and ENDING, for
 252 the purpose of drawing the graph.  It need not be the actual
 253 current time."
 254   (let* ((done-dates (sort (org-habit-done-dates habit) '<))
 255          (scheduled (org-habit-scheduled habit))
 256          (s-repeat (org-habit-scheduled-repeat habit))
 257          (start (time-to-days starting))
 258          (now (time-to-days current))
 259          (end (time-to-days ending))
 260          (graph (make-string (1+ (- end start)) ?\ ))
 261          (index 0)
 262          last-done-date)
 263     (while (and done-dates (< (car done-dates) start))
 264       (setq last-done-date (car done-dates)
 265             done-dates (cdr done-dates)))
 266     (while (< start end)
 267       (let* ((in-the-past-p (< start now))
 268              (todayp (= start now))
 269              (donep (and done-dates
 270                          (= start (car done-dates))))
 271              (faces (if (and in-the-past-p
 272                              (not last-done-date)
 273                              (not (< scheduled now)))
 274                         '(org-habit-clear-face . org-habit-clear-future-face)
 275                       (org-habit-get-faces
 276                        habit start (and in-the-past-p
 277                                         (if last-done-date
 278                                             (+ last-done-date s-repeat)
 279                                           scheduled))
 280                        donep)))
 281              markedp face)
 282         (if donep
 283             (progn
 284               (aset graph index ?*)
 285               (setq markedp t)
 286               (while (and done-dates
 287                           (= start (car done-dates)))
 288                 (setq last-done-date (car done-dates)
 289                       done-dates (cdr done-dates))))
 290           (if todayp
 291               (aset graph index ?!)))
 292         (setq face (if (or in-the-past-p todayp)
 293                        (car faces)
 294                      (cdr faces)))
 295         (if (and in-the-past-p
 296                  (not (eq face 'org-habit-overdue-face))
 297                  (not markedp))
 298             (setq face (cdr faces)))
 299         (put-text-property index (1+ index) 'face face graph))
 300       (setq start (1+ start)
 301             index (1+ index)))
 302     graph))
 303
 304 (defun org-habit-insert-consistency-graphs (&optional line)
 305   "Insert consistency graph for any habitual tasks."
 306   (let ((inhibit-read-only t) l c
 307         (moment (time-subtract (current-time)
 308                                (list 0 (* 3600 org-extend-today-until) 0))))
 309     (save-excursion
 310       (goto-char (if line (point-at-bol) (point-min)))
 311       (while (not (eobp))
 312         (let ((habit (get-text-property (point) 'org-habit-p)))
 313           (when habit
 314             (move-to-column org-habit-graph-column t)
 315             (delete-char (min (+ 1 org-habit-preceding-days
 316                                  org-habit-following-days)
 317                               (- (line-end-position) (point))))
 318             (insert (org-habit-build-graph
 319                      habit
 320                      (time-subtract moment
 321                                     (days-to-time org-habit-preceding-days))
 322                      moment
 323                      (time-add moment
 324                                (days-to-time org-habit-following-days))))))
 325         (forward-line)))))
 326
 327 (defun org-habit-toggle-habits ()
 328   "Toggle display of habits in an agenda buffer."
 329   (interactive)
 330   (org-agenda-check-type t 'agenda)
 331   (setq org-habit-show-habits (not org-habit-show-habits))
 332   (org-agenda-redo)
 333   (org-agenda-set-mode-name)
 334   (message "Habits turned %s"
 335            (if org-habit-show-habits "on" "off")))
 336
 337 (org-defkey org-agenda-mode-map "K" 'org-habit-toggle-habits)
 338
 339 (provide 'org-habit)
 340
 341 ;; arch-tag: 64e070d9-bd09-4917-bd44-44465f5ed348
 342
 343 ;;; org-habit.el ends here