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: 6.35b
   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 "#8270f9"))
  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 "#d6e4fc"))
  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 "#4df946"))
  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 "#acfca9"))
  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 "#f5f946"))
  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 "#fafca9"))
 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 "#f9372d"))
 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 "#fc9590"))
 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   "Is the task at POM or point a habit?"
 132   (string= "habit" (org-entry-get (or pom (point)) "STYLE")))
 133
 134 (defun org-habit-parse-todo (&optional pom)
 135   "Parse the TODO surrounding point for its habit-related data.
 136 Returns a list with the following elements:
 137
 138   0: Scheduled date for the habit (may be in the past)
 139   1: \".+\"-style repeater for the schedule, in days
 140   2: Optional deadline (nil if not present)
 141   3: If deadline, the repeater for the deadline, otherwise nil
 142   4: A list of all the past dates this todo was mark closed
 143
 144 This list represents a \"habit\" for the rest of this module."
 145   (save-excursion
 146     (if pom (goto-char pom))
 147     (assert (org-is-habit-p (point)))
 148     (let* ((scheduled (org-get-scheduled-time (point)))
 149            (scheduled-repeat (org-get-repeat org-scheduled-string))
 150            (sr-days (org-habit-duration-to-days scheduled-repeat))
 151            (end (org-entry-end-position))
 152            (habit-entry (org-no-properties (nth 5 (org-heading-components))))
 153            closed-dates deadline dr-days)
 154       (if scheduled
 155           (setq scheduled (time-to-days scheduled))
 156         (error "Habit %s has no scheduled date" habit-entry))
 157       (unless scheduled-repeat
 158         (error "Habit %s has no scheduled repeat period" habit-entry))
 159       (unless (> sr-days 0)
 160         (error "Habit %s scheduled repeat period is less than 1d" habit-entry))
 161       (when (string-match "/\\([0-9]+[dwmy]\\)" scheduled-repeat)
 162         (setq dr-days (org-habit-duration-to-days
 163                        (match-string-no-properties 1 scheduled-repeat)))
 164         (if (<= dr-days sr-days)
 165             (error "Habit %s deadline repeat period is less than or equal to scheduled (%s)"
 166                    habit-entry scheduled-repeat))
 167         (setq deadline (+ scheduled (- dr-days sr-days))))
 168       (org-back-to-heading t)
 169       (while (re-search-forward "- State \"DONE\".*\\[\\([^]]+\\)\\]" end t)
 170         (push (time-to-days
 171                (org-time-string-to-time (match-string-no-properties 1)))
 172               closed-dates))
 173       (list scheduled sr-days deadline dr-days closed-dates))))
 174
 175 (defsubst org-habit-scheduled (habit)
 176   (nth 0 habit))
 177 (defsubst org-habit-scheduled-repeat (habit)
 178   (nth 1 habit))
 179 (defsubst org-habit-deadline (habit)
 180   (let ((deadline (nth 2 habit)))
 181     (or deadline
 182         (+ (org-habit-scheduled habit)
 183            (1- (org-habit-scheduled-repeat habit))))))
 184 (defsubst org-habit-deadline-repeat (habit)
 185   (or (nth 3 habit)
 186       (org-habit-scheduled-repeat habit)))
 187 (defsubst org-habit-done-dates (habit)
 188   (nth 4 habit))
 189
 190 (defsubst org-habit-get-priority (habit &optional moment)
 191   "Determine the relative priority of a habit.
 192 This must take into account not just urgency, but consistency as well."
 193   (let ((pri 1000)
 194         (now (time-to-days
 195               (or moment
 196                   (time-subtract (current-time)
 197                                  (list 0 (* 3600 org-extend-today-until) 0)))))
 198         (scheduled (org-habit-scheduled habit))
 199         (deadline (org-habit-deadline habit)))
 200     ;; add 10 for every day past the scheduled date, and subtract for every
 201     ;; day before it
 202     (setq pri (+ pri (* (- now scheduled) 10)))
 203     ;; add 50 if the deadline is today
 204     (if (and (/= scheduled deadline)
 205              (= now deadline))
 206         (setq pri (+ pri 50)))
 207     ;; add 100 for every day beyond the deadline date, and subtract 10 for
 208     ;; every day before it
 209     (let ((slip (- now (1- deadline))))
 210       (if (> slip 0)
 211           (setq pri (+ pri (* slip 100)))
 212         (setq pri (+ pri (* slip 10)))))
 213     pri))
 214
 215 (defun org-habit-get-faces (habit &optional now-days scheduled-days donep)
 216   "Return faces for HABIT relative to NOW-DAYS and SCHEDULED-DAYS.
 217 NOW-DAYS defaults to the current time's days-past-the-epoch if nil.
 218 SCHEDULED-DAYS defaults to the habit's actual scheduled days if nil.
 219
 220 Habits are assigned colors on the following basis:
 221   Blue      Task is before the scheduled date.
 222   Green     Task is on or after scheduled date, but before the
 223             end of the schedule's repeat period.
 224   Yellow    If the task has a deadline, then it is after schedule's
 225             repeat period, but before the deadline.
 226   Orange    The task has reached the deadline day, or if there is
 227             no deadline, the end of the schedule's repeat period.
 228   Red       The task has gone beyond the deadline day or the
 229             schedule's repeat period."
 230   (let* ((scheduled (or scheduled-days (org-habit-scheduled habit)))
 231          (s-repeat (org-habit-scheduled-repeat habit))
 232          (scheduled-end (+ scheduled (1- s-repeat)))
 233          (d-repeat (org-habit-deadline-repeat habit))
 234          (deadline (if scheduled-days
 235                        (+ scheduled-days (- d-repeat s-repeat))
 236                      (org-habit-deadline habit)))
 237          (m-days (or now-days (time-to-days (current-time)))))
 238     (cond
 239      ((< m-days scheduled)
 240       '(org-habit-clear-face . org-habit-clear-future-face))
 241      ((< m-days deadline)
 242       '(org-habit-ready-face . org-habit-ready-future-face))
 243      ((= m-days deadline)
 244       (if donep
 245           '(org-habit-ready-face . org-habit-ready-future-face)
 246         '(org-habit-alert-face . org-habit-alert-future-face)))
 247      (t
 248       '(org-habit-overdue-face . org-habit-overdue-future-face)))))
 249
 250 (defun org-habit-build-graph (habit starting current ending)
 251   "Build a graph for the given HABIT, from STARTING to ENDING.
 252 CURRENT gives the current time between STARTING and ENDING, for
 253 the purpose of drawing the graph.  It need not be the actual
 254 current time."
 255   (let* ((done-dates (sort (org-habit-done-dates habit) '<))
 256          (scheduled (org-habit-scheduled habit))
 257          (s-repeat (org-habit-scheduled-repeat habit))
 258          (start (time-to-days starting))
 259          (now (time-to-days current))
 260          (end (time-to-days ending))
 261          (graph (make-string (1+ (- end start)) ?\ ))
 262          (index 0)
 263          last-done-date)
 264     (while (and done-dates (< (car done-dates) start))
 265       (setq last-done-date (car done-dates)
 266             done-dates (cdr done-dates)))
 267     (while (< start end)
 268       (let* ((in-the-past-p (< start now))
 269              (todayp (= start now))
 270              (donep (and done-dates
 271                          (= start (car done-dates))))
 272              (faces (if (and in-the-past-p
 273                              (not last-done-date)
 274                              (not (< scheduled now)))
 275                         '(org-habit-clear-face . org-habit-clear-future-face)
 276                       (org-habit-get-faces
 277                        habit start (and in-the-past-p
 278                                         (if last-done-date
 279                                             (+ last-done-date s-repeat)
 280                                           scheduled))
 281                        donep)))
 282              markedp face)
 283         (if donep
 284             (progn
 285               (aset graph index ?*)
 286               (setq markedp t)
 287               (while (and done-dates
 288                           (= start (car done-dates)))
 289                 (setq last-done-date (car done-dates)
 290                       done-dates (cdr done-dates))))
 291           (if todayp
 292               (aset graph index ?!)))
 293         (setq face (if (or in-the-past-p todayp)
 294                        (car faces)
 295                      (cdr faces)))
 296         (if (and in-the-past-p
 297                  (not (eq face 'org-habit-overdue-face))
 298                  (not markedp))
 299             (setq face (cdr faces)))
 300         (put-text-property index (1+ index) 'face face graph))
 301       (setq start (1+ start)
 302             index (1+ index)))
 303     graph))
 304
 305 (defun org-habit-insert-consistency-graphs (&optional line)
 306   "Insert consistency graph for any habitual tasks."
 307   (let ((inhibit-read-only t) l c
 308         (buffer-invisibility-spec '(org-link))
 309         (moment (time-subtract (current-time)
 310                                (list 0 (* 3600 org-extend-today-until) 0))))
 311     (save-excursion
 312       (goto-char (if line (point-at-bol) (point-min)))
 313       (while (not (eobp))
 314         (let ((habit (get-text-property (point) 'org-habit-p)))
 315           (when habit
 316             (move-to-column org-habit-graph-column t)
 317             (delete-char (min (+ 1 org-habit-preceding-days
 318                                  org-habit-following-days)
 319                               (- (line-end-position) (point))))
 320             (insert (org-habit-build-graph
 321                      habit
 322                      (time-subtract moment
 323                                     (days-to-time org-habit-preceding-days))
 324                      moment
 325                      (time-add moment
 326                                (days-to-time org-habit-following-days))))))
 327         (forward-line)))))
 328
 329 (defun org-habit-toggle-habits ()
 330   "Toggle display of habits in an agenda buffer."
 331   (interactive)
 332   (org-agenda-check-type t 'agenda)
 333   (setq org-habit-show-habits (not org-habit-show-habits))
 334   (org-agenda-redo)
 335   (org-agenda-set-mode-name)
 336   (message "Habits turned %s"
 337            (if org-habit-show-habits "on" "off")))
 338
 339 (org-defkey org-agenda-mode-map "K" 'org-habit-toggle-habits)
 340
 341 (provide 'org-habit)
 342
 343 ;; arch-tag: 64e070d9-bd09-4917-bd44-44465f5ed348
 344
 345 ;;; org-habit.el ends here