lisp/org/org-habit.el

   1 ;;; org-habit.el --- The habit tracking code for Org-mode
   2
   3 ;; Copyright (C) 2009-2011 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: 7.4
   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 ;;; Code:
  31
  32 (require 'org)
  33 (require 'org-agenda)
  34
  35 (eval-when-compile
  36   (require 'cl))
  37
  38 (defgroup org-habit nil
  39   "Options concerning habit tracking in Org-mode."
  40   :tag "Org Habit"
  41   :group 'org-progress)
  42
  43 (defcustom org-habit-graph-column 40
  44   "The absolute column at which to insert habit consistency graphs.
  45 Note that consistency graphs will overwrite anything else in the buffer."
  46   :group 'org-habit
  47   :type 'integer)
  48
  49 (defcustom org-habit-preceding-days 21
  50   "Number of days before today to appear in consistency graphs."
  51   :group 'org-habit
  52   :type 'integer)
  53
  54 (defcustom org-habit-following-days 7
  55   "Number of days after today to appear in consistency graphs."
  56   :group 'org-habit
  57   :type 'integer)
  58
  59 (defcustom org-habit-show-habits t
  60   "If non-nil, show habits in agenda buffers."
  61   :group 'org-habit
  62   :type 'boolean)
  63
  64 (defcustom org-habit-show-habits-only-for-today t
  65   "If non-nil, only show habits on today's agenda, and not for future days.
  66 Note that even when shown for future days, the graph is always
  67 relative to the current effective date."
  68   :group 'org-habit
  69   :type 'boolean)
  70
  71 (defface org-habit-clear-face
  72   '((((background light)) (:background "#8270f9"))
  73     (((background dark)) (:background "blue")))
  74   "Face for days on which a task shouldn't be done yet."
  75   :group 'org-habit
  76   :group 'org-faces)
  77 (defface org-habit-clear-future-face
  78   '((((background light)) (:background "#d6e4fc"))
  79     (((background dark)) (:background "midnightblue")))
  80   "Face for future days on which a task shouldn't be done yet."
  81   :group 'org-habit
  82   :group 'org-faces)
  83
  84 (defface org-habit-ready-face
  85   '((((background light)) (:background "#4df946"))
  86     (((background dark)) (:background "forestgreen")))
  87   "Face for days on which a task should start to be done."
  88   :group 'org-habit
  89   :group 'org-faces)
  90 (defface org-habit-ready-future-face
  91   '((((background light)) (:background "#acfca9"))
  92     (((background dark)) (:background "darkgreen")))
  93   "Face for days on which a task should start to be done."
  94   :group 'org-habit
  95   :group 'org-faces)
  96
  97 (defface org-habit-alert-face
  98   '((((background light)) (:background "#f5f946"))
  99     (((background dark)) (:background "gold")))
 100   "Face for days on which a task is due."
 101   :group 'org-habit
 102   :group 'org-faces)
 103 (defface org-habit-alert-future-face
 104   '((((background light)) (:background "#fafca9"))
 105     (((background dark)) (:background "darkgoldenrod")))
 106   "Face for days on which a task is due."
 107   :group 'org-habit
 108   :group 'org-faces)
 109
 110 (defface org-habit-overdue-face
 111   '((((background light)) (:background "#f9372d"))
 112     (((background dark)) (:background "firebrick")))
 113   "Face for days on which a task is overdue."
 114   :group 'org-habit
 115   :group 'org-faces)
 116 (defface org-habit-overdue-future-face
 117   '((((background light)) (:background "#fc9590"))
 118     (((background dark)) (:background "darkred")))
 119   "Face for days on which a task is overdue."
 120   :group 'org-habit
 121   :group 'org-faces)
 122
 123 (defun org-habit-duration-to-days (ts)
 124   (if (string-match "\\([0-9]+\\)\\([dwmy]\\)" ts)
 125       ;; lead time is specified.
 126       (floor (* (string-to-number (match-string 1 ts))
 127                 (cdr (assoc (match-string 2 ts)
 128                             '(("d" . 1)    ("w" . 7)
 129                               ("m" . 30.4) ("y" . 365.25))))))
 130     (error "Invalid duration string: %s" ts)))
 131
 132 (defun org-is-habit-p (&optional pom)
 133   "Is the task at POM or point a habit?"
 134   (string= "habit" (org-entry-get (or pom (point)) "STYLE")))
 135
 136 (defun org-habit-parse-todo (&optional pom)
 137   "Parse the TODO surrounding point for its habit-related data.
 138 Returns a list with the following elements:
 139
 140   0: Scheduled date for the habit (may be in the past)
 141   1: \".+\"-style repeater for the schedule, in days
 142   2: Optional deadline (nil if not present)
 143   3: If deadline, the repeater for the deadline, otherwise nil
 144   4: A list of all the past dates this todo was mark closed
 145
 146 This list represents a \"habit\" for the rest of this module."
 147   (save-excursion
 148     (if pom (goto-char pom))
 149     (assert (org-is-habit-p (point)))
 150     (let* ((scheduled (org-get-scheduled-time (point)))
 151            (scheduled-repeat (org-get-repeat org-scheduled-string))
 152            (end (org-entry-end-position))
 153            (habit-entry (org-no-properties (nth 4 (org-heading-components))))
 154            closed-dates deadline dr-days sr-days)
 155       (if scheduled
 156           (setq scheduled (time-to-days scheduled))
 157         (error "Habit %s has no scheduled date" habit-entry))
 158       (unless scheduled-repeat
 159         (error
 160          "Habit '%s' has no scheduled repeat period or has an incorrect one"
 161          habit-entry))
 162       (setq sr-days (org-habit-duration-to-days scheduled-repeat))
 163       (unless (> sr-days 0)
 164         (error "Habit %s scheduled repeat period is less than 1d" habit-entry))
 165       (when (string-match "/\\([0-9]+[dwmy]\\)" scheduled-repeat)
 166         (setq dr-days (org-habit-duration-to-days
 167                        (match-string-no-properties 1 scheduled-repeat)))
 168         (if (<= dr-days sr-days)
 169             (error "Habit %s deadline repeat period is less than or equal to scheduled (%s)"
 170                    habit-entry scheduled-repeat))
 171         (setq deadline (+ scheduled (- dr-days sr-days))))
 172       (org-back-to-heading t)
 173       (while (re-search-forward "- State \"DONE\".*\\[\\([^]]+\\)\\]" end t)
 174         (push (time-to-days
 175                (org-time-string-to-time (match-string-no-properties 1)))
 176               closed-dates))
 177       (list scheduled sr-days deadline dr-days closed-dates))))
 178
 179 (defsubst org-habit-scheduled (habit)
 180   (nth 0 habit))
 181 (defsubst org-habit-scheduled-repeat (habit)
 182   (nth 1 habit))
 183 (defsubst org-habit-deadline (habit)
 184   (let ((deadline (nth 2 habit)))
 185     (or deadline
 186         (if (nth 3 habit)
 187             (+ (org-habit-scheduled habit)
 188                (1- (org-habit-scheduled-repeat habit)))
 189           (org-habit-scheduled habit)))))
 190 (defsubst org-habit-deadline-repeat (habit)
 191   (or (nth 3 habit)
 192       (org-habit-scheduled-repeat habit)))
 193 (defsubst org-habit-done-dates (habit)
 194   (nth 4 habit))
 195
 196 (defsubst org-habit-get-priority (habit &optional moment)
 197   "Determine the relative priority of a habit.
 198 This must take into account not just urgency, but consistency as well."
 199   (let ((pri 1000)
 200         (now (if moment (time-to-days moment) (org-today)))
 201         (scheduled (org-habit-scheduled habit))
 202         (deadline (org-habit-deadline habit)))
 203     ;; add 10 for every day past the scheduled date, and subtract for every
 204     ;; day before it
 205     (setq pri (+ pri (* (- now scheduled) 10)))
 206     ;; add 50 if the deadline is today
 207     (if (and (/= scheduled deadline)
 208              (= now deadline))
 209         (setq pri (+ pri 50)))
 210     ;; add 100 for every day beyond the deadline date, and subtract 10 for
 211     ;; every day before it
 212     (let ((slip (- now (1- deadline))))
 213       (if (> slip 0)
 214           (setq pri (+ pri (* slip 100)))
 215         (setq pri (+ pri (* slip 10)))))
 216     pri))
 217
 218 (defun org-habit-get-faces (habit &optional now-days scheduled-days donep)
 219   "Return faces for HABIT relative to NOW-DAYS and SCHEDULED-DAYS.
 220 NOW-DAYS defaults to the current time's days-past-the-epoch if nil.
 221 SCHEDULED-DAYS defaults to the habit's actual scheduled days if nil.
 222
 223 Habits are assigned colors on the following basis:
 224   Blue      Task is before the scheduled date.
 225   Green     Task is on or after scheduled date, but before the
 226             end of the schedule's repeat period.
 227   Yellow    If the task has a deadline, then it is after schedule's
 228             repeat period, but before the deadline.
 229   Orange    The task has reached the deadline day, or if there is
 230             no deadline, the end of the schedule's repeat period.
 231   Red       The task has gone beyond the deadline day or the
 232             schedule's repeat period."
 233   (let* ((scheduled (or scheduled-days (org-habit-scheduled habit)))
 234          (s-repeat (org-habit-scheduled-repeat habit))
 235          (scheduled-end (+ scheduled (1- s-repeat)))
 236          (d-repeat (org-habit-deadline-repeat habit))
 237          (deadline (if scheduled-days
 238                        (+ scheduled-days (- d-repeat s-repeat))
 239                      (org-habit-deadline habit)))
 240          (m-days (or now-days (time-to-days (current-time)))))
 241     (cond
 242      ((< m-days scheduled)
 243       '(org-habit-clear-face . org-habit-clear-future-face))
 244      ((< m-days deadline)
 245       '(org-habit-ready-face . org-habit-ready-future-face))
 246      ((= m-days deadline)
 247       (if donep
 248           '(org-habit-ready-face . org-habit-ready-future-face)
 249         '(org-habit-alert-face . org-habit-alert-future-face)))
 250      (t
 251       '(org-habit-overdue-face . org-habit-overdue-future-face)))))
 252
 253 (defun org-habit-build-graph (habit starting current ending)
 254   "Build a graph for the given HABIT, from STARTING to ENDING.
 255 CURRENT gives the current time between STARTING and ENDING, for
 256 the purpose of drawing the graph.  It need not be the actual
 257 current time."
 258   (let* ((done-dates (sort (org-habit-done-dates habit) '<))
 259          (scheduled (org-habit-scheduled habit))
 260          (s-repeat (org-habit-scheduled-repeat habit))
 261          (start (time-to-days starting))
 262          (now (time-to-days current))
 263          (end (time-to-days ending))
 264          (graph (make-string (1+ (- end start)) ?\ ))
 265          (index 0)
 266          last-done-date)
 267     (while (and done-dates (< (car done-dates) start))
 268       (setq last-done-date (car done-dates)
 269             done-dates (cdr done-dates)))
 270     (while (< start end)
 271       (let* ((in-the-past-p (< start now))
 272              (todayp (= start now))
 273              (donep (and done-dates
 274                          (= start (car done-dates))))
 275              (faces (if (and in-the-past-p
 276                              (not last-done-date)
 277                              (not (< scheduled now)))
 278                         '(org-habit-clear-face . org-habit-clear-future-face)
 279                       (org-habit-get-faces
 280                        habit start (and in-the-past-p
 281                                         (if last-done-date
 282                                             (+ last-done-date s-repeat)
 283                                           scheduled))
 284                        donep)))
 285              markedp face)
 286         (if donep
 287             (let ((done-time (time-add
 288                               starting
 289                               (days-to-time
 290                                (- start (time-to-days starting))))))
 291
 292               (aset graph index ?*)
 293               (setq markedp t)
 294               (put-text-property
 295                index (1+ index) 'help-echo
 296                (format-time-string (org-time-stamp-format) done-time) graph)
 297               (while (and done-dates
 298                           (= start (car done-dates)))
 299                 (setq last-done-date (car done-dates)
 300                       done-dates (cdr done-dates))))
 301           (if todayp
 302               (aset graph index ?!)))
 303         (setq face (if (or in-the-past-p todayp)
 304                        (car faces)
 305                      (cdr faces)))
 306         (if (and in-the-past-p
 307                  (not (eq face 'org-habit-overdue-face))
 308                  (not markedp))
 309             (setq face (cdr faces)))
 310         (put-text-property index (1+ index) 'face face graph))
 311       (setq start (1+ start)
 312             index (1+ index)))
 313     graph))
 314
 315 (defun org-habit-insert-consistency-graphs (&optional line)
 316   "Insert consistency graph for any habitual tasks."
 317   (let ((inhibit-read-only t) l c
 318         (buffer-invisibility-spec '(org-link))
 319         (moment (time-subtract (current-time)
 320                                (list 0 (* 3600 org-extend-today-until) 0))))
 321     (save-excursion
 322       (goto-char (if line (point-at-bol) (point-min)))
 323       (while (not (eobp))
 324         (let ((habit (get-text-property (point) 'org-habit-p)))
 325           (when habit
 326             (move-to-column org-habit-graph-column t)
 327             (delete-char (min (+ 1 org-habit-preceding-days
 328                                  org-habit-following-days)
 329                               (- (line-end-position) (point))))
 330             (insert (org-habit-build-graph
 331                      habit
 332                      (time-subtract moment
 333                                     (days-to-time org-habit-preceding-days))
 334                      moment
 335                      (time-add moment
 336                                (days-to-time org-habit-following-days))))))
 337         (forward-line)))))
 338
 339 (defun org-habit-toggle-habits ()
 340   "Toggle display of habits in an agenda buffer."
 341   (interactive)
 342   (org-agenda-check-type t 'agenda)
 343   (setq org-habit-show-habits (not org-habit-show-habits))
 344   (org-agenda-redo)
 345   (org-agenda-set-mode-name)
 346   (message "Habits turned %s"
 347            (if org-habit-show-habits "on" "off")))
 348
 349 (org-defkey org-agenda-mode-map "K" 'org-habit-toggle-habits)
 350
 351 (provide 'org-habit)
 352
 353
 354 ;;; org-habit.el ends here