From 3f4a0d5370ae6c34afe180df96add3b8522f4af1 Mon Sep 17 00:00:00 2001
From: mattkae <mattkae@protonmail.com>
Date: Wed, 11 May 2022 09:23:58 -0400
Subject: initial commit

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+;;; org-habit.el --- The habit tracking code for Org -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2009-2021 Free Software Foundation, Inc.
+
+;; Author: John Wiegley <johnw at gnu dot org>
+;; Keywords: outlines, hypermedia, calendar, wp
+;; Homepage: https://orgmode.org
+;;
+;; 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 <https://www.gnu.org/licenses/>.
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;
+;;; Commentary:
+
+;; This file contains the habit tracking code for Org mode
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'org)
+(require 'org-agenda)
+
+(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)
+
+(defcustom org-habit-show-all-today nil
+  "If non-nil, will show the consistency graph of all habits on
+today's agenda, even if they are not scheduled."
+  :group 'org-habit
+  :type 'boolean)
+
+(defcustom org-habit-today-glyph ?!
+  "Glyph character used to identify today."
+  :group 'org-habit
+  :version "24.1"
+  :type 'character)
+
+(defcustom org-habit-completed-glyph ?*
+  "Glyph character used to show completed days on which a task was done."
+  :group 'org-habit
+  :version "24.1"
+  :type 'character)
+
+(defcustom org-habit-show-done-always-green nil
+  "Non-nil means DONE days will always be green in the consistency graph.
+It will be green even if it was done after the deadline."
+  :group 'org-habit
+  :type 'boolean)
+
+(defcustom org-habit-scheduled-past-days nil
+  "Value to use instead of `org-scheduled-past-days', for habits only.
+
+If nil, `org-scheduled-past-days' is used.
+
+Setting this to say 10000 is a way to make habits always show up
+as a reminder, even if you set `org-scheduled-past-days' to a
+small value because you regard scheduled items as a way of
+\"turning on\" TODO items on a particular date, rather than as a
+means of creating calendar-based reminders."
+  :group 'org-habit
+  :type '(choice integer (const nil))
+  :package-version '(Org . "9.3")
+  :safe (lambda (v) (or (integerp v) (null v))))
+
+(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
+  5: Repeater type as a string
+
+This list represents a \"habit\" for the rest of this module."
+  (save-excursion
+    (if pom (goto-char pom))
+    (cl-assert (org-is-habit-p (point)))
+    (let* ((scheduled (org-get-scheduled-time (point)))
+	   (scheduled-repeat (org-get-repeat (org-entry-get (point) "SCHEDULED")))
+	   (end (org-entry-end-position))
+	   (habit-entry (org-no-properties (nth 4 (org-heading-components))))
+	   closed-dates deadline dr-days sr-days sr-type)
+      (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)
+	    sr-type (progn (string-match "[\\.+]?\\+" scheduled-repeat)
+			   (match-string-no-properties 0 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)
+      (let* ((maxdays (+ org-habit-preceding-days org-habit-following-days))
+	     (reversed org-log-states-order-reversed)
+	     (search (if reversed 're-search-forward 're-search-backward))
+	     (limit (if reversed end (point)))
+	     (count 0)
+	     (re (format
+		  "^[ \t]*-[ \t]+\\(?:State \"%s\".*%s%s\\)"
+		  (regexp-opt org-done-keywords)
+		  org-ts-regexp-inactive
+		  (let ((value (cdr (assq 'done org-log-note-headings))))
+		    (if (not value) ""
+		      (concat "\\|"
+			      (org-replace-escapes
+			       (regexp-quote value)
+			       `(("%d" . ,org-ts-regexp-inactive)
+				 ("%D" . ,org-ts-regexp)
+				 ("%s" . "\"\\S-+\"")
+				 ("%S" . "\"\\S-+\"")
+				 ("%t" . ,org-ts-regexp-inactive)
+				 ("%T" . ,org-ts-regexp)
+				 ("%u" . ".*?")
+				 ("%U" . ".*?")))))))))
+	(unless reversed (goto-char end))
+	(while (and (< count maxdays) (funcall search re limit t))
+	  (push (time-to-days
+		 (org-time-string-to-time
+		  (or (match-string-no-properties 1)
+		      (match-string-no-properties 2))))
+		closed-dates)
+	  (setq count (1+ count))))
+      (list scheduled sr-days deadline dr-days closed-dates sr-type))))
+
+(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-repeat-type (habit)
+  (nth 5 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))
+	 (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 nil))))
+    (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)))
+     ((and org-habit-show-done-always-green donep)
+      '(org-habit-ready-face . org-habit-ready-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* ((all-done-dates (sort (org-habit-done-dates habit) #'<))
+	 (done-dates all-done-dates)
+	 (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)) ?\s))
+	 (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)))
+		  (if (and all-done-dates (= (car all-done-dates) start))
+		      ;; This is the very first done of this habit.
+		      '(org-habit-ready-face . org-habit-ready-future-face)
+		    '(org-habit-clear-face . org-habit-clear-future-face))
+		(org-habit-get-faces
+		 habit start
+		 (and in-the-past-p
+		      last-done-date
+		      ;; Compute scheduled time for habit at the time
+		      ;; START was current.
+		      (let ((type (org-habit-repeat-type habit)))
+			(cond
+			 ;; At the last done date, use current
+			 ;; scheduling in all cases.
+			 ((null done-dates) scheduled)
+			 ((equal type ".+") (+ last-done-date s-repeat))
+			 ((equal type "+")
+			  ;; Since LAST-DONE-DATE, each done mark
+			  ;; shifted scheduled date by S-REPEAT.
+			  (- scheduled (* (length done-dates) s-repeat)))
+			 (t
+			  ;; Compute the scheduled time after the
+			  ;; first repeat.  This is the closest time
+			  ;; past FIRST-DONE which can reach SCHEDULED
+			  ;; by a number of S-REPEAT hops.
+			  ;;
+			  ;; Then, play TODO state change history from
+			  ;; the beginning in order to find current
+			  ;; scheduled time.
+			  (let* ((first-done (car all-done-dates))
+				 (s (let ((shift (mod (- scheduled first-done)
+						      s-repeat)))
+				      (+ (if (= shift 0) s-repeat shift)
+					 first-done))))
+			    (if (= first-done last-done-date) s
+			      (catch :exit
+				(dolist (done (cdr all-done-dates) s)
+				  ;; Each repeat shifts S by any
+				  ;; number of S-REPEAT hops it takes
+				  ;; to get past DONE, with a minimum
+				  ;; of one hop.
+				  (cl-incf s (* (1+ (/ (max (- done s) 0)
+						       s-repeat))
+						s-repeat))
+				  (when (= done last-done-date)
+				    (throw :exit s))))))))))
+		 donep)))
+	     markedp face)
+	(cond
+	 (donep
+	  (aset graph index org-habit-completed-glyph)
+	  (setq markedp t)
+	  (while (and done-dates (= start (car done-dates)))
+	    (setq last-done-date (car done-dates))
+	    (setq done-dates (cdr done-dates))))
+	 (todayp
+	  (aset graph index org-habit-today-glyph)))
+	(setq face (if (or in-the-past-p todayp)
+		       (car faces)
+		     (cdr faces)))
+	(when (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)
+	(put-text-property index (1+ index)
+			   'help-echo
+			   (concat (format-time-string
+				    (org-time-stamp-format)
+				    (time-add starting (days-to-time (- start (time-to-days starting)))))
+				   (if donep " DONE" ""))
+			   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)
+	(buffer-invisibility-spec '(org-link))
+	(moment (org-time-subtract nil
+				   (* 3600 org-extend-today-until))))
+    (save-excursion
+      (goto-char (if line (point-at-bol) (point-min)))
+      (while (not (eobp))
+	(let ((habit (get-text-property (point) 'org-habit-p))
+              (invisible-prop (get-text-property (point) 'invisible)))
+	  (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-before-markers
+	     (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))))
+            ;; Inherit invisible state of hidden entries.
+            (when invisible-prop
+              (put-text-property
+               (- (point) org-habit-graph-column) (point)
+               'invisible invisible-prop))))
+	(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")))
+
+(defun org-habit-toggle-display-in-agenda (arg)
+  "Toggle display of habits in agenda.
+With ARG toggle display of all vs. undone scheduled habits.
+See `org-habit-show-all-today'."
+  (interactive "P")
+  (if (not arg)
+      (org-habit-toggle-habits)
+    (org-agenda-check-type t 'agenda)
+    (setq org-habit-show-all-today (not org-habit-show-all-today))
+    (when org-habit-show-habits (org-agenda-redo))))
+
+(org-defkey org-agenda-mode-map "K" 'org-habit-toggle-display-in-agenda)
+
+(provide 'org-habit)
+
+;;; org-habit.el ends here
-- 
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