summaryrefslogtreecommitdiff
path: root/lisp/org/org-habit.el
blob: 4812bea92784f3120f8b42713cf5485c7a85ffb5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
;;; org-habit.el --- The habit tracking code for Org-mode

;; Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.

;; Author: John Wiegley <johnw at gnu dot org>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: http://orgmode.org
;; Version: 7.4
;;
;; This file is part of GNU Emacs.
;;
;; GNU Emacs 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 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:

;; This file contains the habit tracking code for Org-mode

;;; Code:

(require 'org)
(require 'org-agenda)

(eval-when-compile
  (require 'cl))

(defgroup org-habit nil
  "Options concerning habit tracking in Org-mode."
  :tag "Org Habit"
  :group 'org-progress)

(defcustom org-habit-graph-column 40
  "The absolute column at which to insert habit consistency graphs.
Note that consistency graphs will overwrite anything else in the buffer."
  :group 'org-habit
  :type 'integer)

(defcustom org-habit-preceding-days 21
  "Number of days before today to appear in consistency graphs."
  :group 'org-habit
  :type 'integer)

(defcustom org-habit-following-days 7
  "Number of days after today to appear in consistency graphs."
  :group 'org-habit
  :type 'integer)

(defcustom org-habit-show-habits t
  "If non-nil, show habits in agenda buffers."
  :group 'org-habit
  :type 'boolean)

(defcustom org-habit-show-habits-only-for-today t
  "If non-nil, only show habits on today's agenda, and not for future days.
Note that even when shown for future days, the graph is always
relative to the current effective date."
  :group 'org-habit
  :type 'boolean)

(defface org-habit-clear-face
  '((((background light)) (:background "#8270f9"))
    (((background dark)) (:background "blue")))
  "Face for days on which a task shouldn't be done yet."
  :group 'org-habit
  :group 'org-faces)
(defface org-habit-clear-future-face
  '((((background light)) (:background "#d6e4fc"))
    (((background dark)) (:background "midnightblue")))
  "Face for future days on which a task shouldn't be done yet."
  :group 'org-habit
  :group 'org-faces)

(defface org-habit-ready-face
  '((((background light)) (:background "#4df946"))
    (((background dark)) (:background "forestgreen")))
  "Face for days on which a task should start to be done."
  :group 'org-habit
  :group 'org-faces)
(defface org-habit-ready-future-face
  '((((background light)) (:background "#acfca9"))
    (((background dark)) (:background "darkgreen")))
  "Face for days on which a task should start to be done."
  :group 'org-habit
  :group 'org-faces)

(defface org-habit-alert-face
  '((((background light)) (:background "#f5f946"))
    (((background dark)) (:background "gold")))
  "Face for days on which a task is due."
  :group 'org-habit
  :group 'org-faces)
(defface org-habit-alert-future-face
  '((((background light)) (:background "#fafca9"))
    (((background dark)) (:background "darkgoldenrod")))
  "Face for days on which a task is due."
  :group 'org-habit
  :group 'org-faces)

(defface org-habit-overdue-face
  '((((background light)) (:background "#f9372d"))
    (((background dark)) (:background "firebrick")))
  "Face for days on which a task is overdue."
  :group 'org-habit
  :group 'org-faces)
(defface org-habit-overdue-future-face
  '((((background light)) (:background "#fc9590"))
    (((background dark)) (:background "darkred")))
  "Face for days on which a task is overdue."
  :group 'org-habit
  :group 'org-faces)

(defun org-habit-duration-to-days (ts)
  (if (string-match "\\([0-9]+\\)\\([dwmy]\\)" ts)
      ;; lead time is specified.
      (floor (* (string-to-number (match-string 1 ts))
		(cdr (assoc (match-string 2 ts)
			    '(("d" . 1)    ("w" . 7)
			      ("m" . 30.4) ("y" . 365.25))))))
    (error "Invalid duration string: %s" ts)))

(defun org-is-habit-p (&optional pom)
  "Is the task at POM or point a habit?"
  (string= "habit" (org-entry-get (or pom (point)) "STYLE")))

(defun org-habit-parse-todo (&optional pom)
  "Parse the TODO surrounding point for its habit-related data.
Returns a list with the following elements:

  0: Scheduled date for the habit (may be in the past)
  1: \".+\"-style repeater for the schedule, in days
  2: Optional deadline (nil if not present)
  3: If deadline, the repeater for the deadline, otherwise nil
  4: A list of all the past dates this todo was mark closed

This list represents a \"habit\" for the rest of this module."
  (save-excursion
    (if pom (goto-char pom))
    (assert (org-is-habit-p (point)))
    (let* ((scheduled (org-get-scheduled-time (point)))
	   (scheduled-repeat (org-get-repeat org-scheduled-string))
	   (end (org-entry-end-position))
	   (habit-entry (org-no-properties (nth 4 (org-heading-components))))
	   closed-dates deadline dr-days sr-days)
      (if scheduled
	  (setq scheduled (time-to-days scheduled))
	(error "Habit %s has no scheduled date" habit-entry))
      (unless scheduled-repeat
	(error
	 "Habit '%s' has no scheduled repeat period or has an incorrect one"
	 habit-entry))
      (setq sr-days (org-habit-duration-to-days scheduled-repeat))
      (unless (> sr-days 0)
	(error "Habit %s scheduled repeat period is less than 1d" habit-entry))
      (when (string-match "/\\([0-9]+[dwmy]\\)" scheduled-repeat)
	(setq dr-days (org-habit-duration-to-days
		       (match-string-no-properties 1 scheduled-repeat)))
	(if (<= dr-days sr-days)
	    (error "Habit %s deadline repeat period is less than or equal to scheduled (%s)"
		   habit-entry scheduled-repeat))
	(setq deadline (+ scheduled (- dr-days sr-days))))
      (org-back-to-heading t)
      (while (re-search-forward "- State \"DONE\".*\\[\\([^]]+\\)\\]" end t)
	(push (time-to-days
	       (org-time-string-to-time (match-string-no-properties 1)))
	      closed-dates))
      (list scheduled sr-days deadline dr-days closed-dates))))

(defsubst org-habit-scheduled (habit)
  (nth 0 habit))
(defsubst org-habit-scheduled-repeat (habit)
  (nth 1 habit))
(defsubst org-habit-deadline (habit)
  (let ((deadline (nth 2 habit)))
    (or deadline
	(if (nth 3 habit)
	    (+ (org-habit-scheduled habit)
	       (1- (org-habit-scheduled-repeat habit)))
	  (org-habit-scheduled habit)))))
(defsubst org-habit-deadline-repeat (habit)
  (or (nth 3 habit)
      (org-habit-scheduled-repeat habit)))
(defsubst org-habit-done-dates (habit)
  (nth 4 habit))

(defsubst org-habit-get-priority (habit &optional moment)
  "Determine the relative priority of a habit.
This must take into account not just urgency, but consistency as well."
  (let ((pri 1000)
	(now (if moment (time-to-days moment) (org-today)))
	(scheduled (org-habit-scheduled habit))
	(deadline (org-habit-deadline habit)))
    ;; add 10 for every day past the scheduled date, and subtract for every
    ;; day before it
    (setq pri (+ pri (* (- now scheduled) 10)))
    ;; add 50 if the deadline is today
    (if (and (/= scheduled deadline)
	     (= now deadline))
	(setq pri (+ pri 50)))
    ;; add 100 for every day beyond the deadline date, and subtract 10 for
    ;; every day before it
    (let ((slip (- now (1- deadline))))
      (if (> slip 0)
	  (setq pri (+ pri (* slip 100)))
	(setq pri (+ pri (* slip 10)))))
    pri))

(defun org-habit-get-faces (habit &optional now-days scheduled-days donep)
  "Return faces for HABIT relative to NOW-DAYS and SCHEDULED-DAYS.
NOW-DAYS defaults to the current time's days-past-the-epoch if nil.
SCHEDULED-DAYS defaults to the habit's actual scheduled days if nil.

Habits are assigned colors on the following basis:
  Blue      Task is before the scheduled date.
  Green     Task is on or after scheduled date, but before the
	    end of the schedule's repeat period.
  Yellow    If the task has a deadline, then it is after schedule's
	    repeat period, but before the deadline.
  Orange    The task has reached the deadline day, or if there is
	    no deadline, the end of the schedule's repeat period.
  Red       The task has gone beyond the deadline day or the
	    schedule's repeat period."
  (let* ((scheduled (or scheduled-days (org-habit-scheduled habit)))
	 (s-repeat (org-habit-scheduled-repeat habit))
	 (scheduled-end (+ scheduled (1- s-repeat)))
	 (d-repeat (org-habit-deadline-repeat habit))
	 (deadline (if scheduled-days
		       (+ scheduled-days (- d-repeat s-repeat))
		     (org-habit-deadline habit)))
	 (m-days (or now-days (time-to-days (current-time)))))
    (cond
     ((< m-days scheduled)
      '(org-habit-clear-face . org-habit-clear-future-face))
     ((< m-days deadline)
      '(org-habit-ready-face . org-habit-ready-future-face))
     ((= m-days deadline)
      (if donep
	  '(org-habit-ready-face . org-habit-ready-future-face)
	'(org-habit-alert-face . org-habit-alert-future-face)))
     (t
      '(org-habit-overdue-face . org-habit-overdue-future-face)))))

(defun org-habit-build-graph (habit starting current ending)
  "Build a graph for the given HABIT, from STARTING to ENDING.
CURRENT gives the current time between STARTING and ENDING, for
the purpose of drawing the graph.  It need not be the actual
current time."
  (let* ((done-dates (sort (org-habit-done-dates habit) '<))
	 (scheduled (org-habit-scheduled habit))
	 (s-repeat (org-habit-scheduled-repeat habit))
	 (start (time-to-days starting))
	 (now (time-to-days current))
	 (end (time-to-days ending))
	 (graph (make-string (1+ (- end start)) ?\ ))
	 (index 0)
	 last-done-date)
    (while (and done-dates (< (car done-dates) start))
      (setq last-done-date (car done-dates)
	    done-dates (cdr done-dates)))
    (while (< start end)
      (let* ((in-the-past-p (< start now))
	     (todayp (= start now))
	     (donep (and done-dates
			 (= start (car done-dates))))
	     (faces (if (and in-the-past-p
			     (not last-done-date)
			     (not (< scheduled now)))
			'(org-habit-clear-face . org-habit-clear-future-face)
		      (org-habit-get-faces
		       habit start (and in-the-past-p
					(if last-done-date
					    (+ last-done-date s-repeat)
					  scheduled))
		       donep)))
	     markedp face)
	(if donep
	    (let ((done-time (time-add
			      starting
			      (days-to-time
			       (- start (time-to-days starting))))))

	      (aset graph index ?*)
	      (setq markedp t)
	      (put-text-property
	       index (1+ index) 'help-echo
	       (format-time-string (org-time-stamp-format) done-time) graph)
	      (while (and done-dates
			  (= start (car done-dates)))
		(setq last-done-date (car done-dates)
		      done-dates (cdr done-dates))))
	  (if todayp
	      (aset graph index ?!)))
	(setq face (if (or in-the-past-p todayp)
		       (car faces)
		     (cdr faces)))
	(if (and in-the-past-p
		 (not (eq face 'org-habit-overdue-face))
		 (not markedp))
	    (setq face (cdr faces)))
	(put-text-property index (1+ index) 'face face graph))
      (setq start (1+ start)
	    index (1+ index)))
    graph))

(defun org-habit-insert-consistency-graphs (&optional line)
  "Insert consistency graph for any habitual tasks."
  (let ((inhibit-read-only t) l c
	(buffer-invisibility-spec '(org-link))
	(moment (time-subtract (current-time)
			       (list 0 (* 3600 org-extend-today-until) 0))))
    (save-excursion
      (goto-char (if line (point-at-bol) (point-min)))
      (while (not (eobp))
	(let ((habit (get-text-property (point) 'org-habit-p)))
	  (when habit
	    (move-to-column org-habit-graph-column t)
	    (delete-char (min (+ 1 org-habit-preceding-days
				 org-habit-following-days)
			      (- (line-end-position) (point))))
	    (insert (org-habit-build-graph
		     habit
		     (time-subtract moment
				    (days-to-time org-habit-preceding-days))
		     moment
		     (time-add moment
			       (days-to-time org-habit-following-days))))))
	(forward-line)))))

(defun org-habit-toggle-habits ()
  "Toggle display of habits in an agenda buffer."
  (interactive)
  (org-agenda-check-type t 'agenda)
  (setq org-habit-show-habits (not org-habit-show-habits))
  (org-agenda-redo)
  (org-agenda-set-mode-name)
  (message "Habits turned %s"
	   (if org-habit-show-habits "on" "off")))

(org-defkey org-agenda-mode-map "K" 'org-habit-toggle-habits)

(provide 'org-habit)


;;; org-habit.el ends here