lisp/org-inlinetask.el

   1 ;;; org-inlinetask.el --- Tasks independent of outline hierarchy
   2
   3 ;; Copyright (C) 2009 Free Software Foundation, Inc.
   4 ;;
   5 ;; Author: Carsten Dominik <carsten at orgmode dot org>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7 ;; Homepage: http://orgmode.org
   8 ;; Version: 6.30trans
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation, either version 3 of the License, or
  16 ;; (at your option) any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  25
  26 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  27 ;;
  28 ;;; Commentary:
  29 ;;
  30 ;; This module implements inline tasks in Org-mode.  Inline tasks are
  31 ;; tasks that have all the properties of normal outline nodes, including
  32 ;; the ability to store meta data like scheduling dates, TODO state, tags
  33 ;; and properties.  However, these nodes are treated specially by the
  34 ;; visibility cycling and export commands.
  35 ;;
  36 ;; Visibility cycling exempts these nodes from cycling. So whenever their
  37 ;; parent is opened, so are these tasks.  This will only work with
  38 ;; `org-cycle', so if you are also using orther commands to show/hide
  39 ;; entries, you will occasionally find these tasks to behave like
  40 ;; all other outline nodes, seemingly splitting the text of the parent
  41 ;; into children.
  42 ;;
  43 ;; Export commands do not treat these nodes as part of the sectioning
  44 ;; structure, but as a special inline text that is either removed, or
  45 ;; formatted in some special way.
  46 ;;
  47 ;; Special fontification of inline tasks, so that they can be immediately
  48 ;; recognized.  From the stars of the headline, only the first and the
  49 ;; last two will be visible, the others will be hidden using the
  50 ;; `org-hide' face.
  51 ;;
  52 ;; An inline task is identified solely by a minimum outline level, given
  53 ;; by the variable `org-inlinetask-min-level', default 15.
  54 ;;
  55 ;; Inline tasks are normally assumed to contain at most a time planning
  56 ;; line (DEADLINE etc) after it, and then any number of drawers, for
  57 ;; example LOGBOOK of PROPERTIES.  No empty lines are allowed.
  58 ;; If you need to have normal text as part of an inline task, you
  59 ;; can do so by adding an "END" headline with the same number of stars,
  60 ;; for example
  61 ;;
  62 ;;    **************** TODO some small task
  63 ;;                     DEADLINE: <2009-03-30 Mon>
  64 ;;                     :PROPERTIES:
  65 ;;                       :SOMETHING: or other
  66 ;;                     :END:
  67 ;;                     And here is some extra text
  68 ;;    **************** END
  69 ;;
  70 ;; Also, if you want to use refiling and archiving for inline tasks,
  71 ;; The END line must be present to make things work properly.
  72 ;;
  73 ;; This package installs one new comand:
  74 ;;
  75 ;; C-c C-x t      Insert a new inline task with END line
  76
  77
  78 ;;; Code
  79
  80 (require 'org)
  81
  82 (defgroup org-inlinetask nil
  83   "Options concerning inline tasks in Org mode."
  84   :tag "Org Inline Tasks"
  85   :group 'org-structure)
  86
  87 (defcustom org-inlinetask-min-level 15
  88   "Minimum level a headline must have before it is treated as an inline task.
  89 It is strongly recommended that you set `org-cycle-max-level' not at all,
  90 or to a number smaller than this one.  In fact, when `org-cycle-max-level' is
  91 not set, it will be assumed to be one less than the value of smaller than
  92 the value of this variable."
  93   :group 'org-inlinetask
  94   :type 'boolean)
  95
  96 (defcustom org-inlinetask-export 'arrow+content
  97   "What should be done with inlinetasks upon export?
  98 Possible values:
  99
 100 nil            Remove entirely, headline and \"content\"
 101 arrow          Insert heading in bold, preceeded by an arrow
 102 arrow+content  Insert arrow and headline, add content below in an
 103                #+begin_example box (ugly, but works for now)
 104
 105 The \"content\" of an inline task is the material below the planning
 106 line and any drawers, up to a lines wit the same number of stars,
 107 but containing only the word END."
 108   :group 'org-inlinetask
 109   :group 'org-export-general
 110   :type '(choice
 111           (const :tag "Remove entirely" nil)
 112           (const :tag "Headline preceeded by arrow" arrow)
 113           (const :tag "Arrow, headline, + content" arrow+content)))
 114
 115 (defvar org-odd-levels-only)
 116 (defvar org-keyword-time-regexp)
 117 (defvar org-drawer-regexp)
 118 (defvar org-complex-heading-regexp)
 119 (defvar org-property-end-re)
 120
 121 (defun org-inlinetask-insert-task ()
 122   "Insert an inline task."
 123   (interactive)
 124   (or (bolp) (newline))
 125   (insert (make-string org-inlinetask-min-level ?*) " \n"
 126           (make-string org-inlinetask-min-level ?*) " END\n")
 127   (end-of-line -1))
 128 (define-key org-mode-map "\C-c\C-xt" 'org-inlinetask-insert-task)
 129
 130 (defun org-inlinetask-export-handler ()
 131   "Handle headlines with level larger or equal to `org-inlinetask-min-level'.
 132 Either remove headline and meta data, or do special formatting."
 133   (goto-char (point-min))
 134   (let* ((nstars (if org-odd-levels-only
 135                      (1- (* 2 (or org-inlinetask-min-level 200)))
 136                    (or org-inlinetask-min-level 200)))
 137          (re1 (format "^\\(\\*\\{%d,\\}\\) .*\n" nstars))
 138          (re2 (concat "^[ \t]*" org-keyword-time-regexp))
 139          headline beg end stars content)
 140     (while (re-search-forward re1 nil t)
 141       (setq headline (match-string 0)
 142             stars (match-string 1)
 143             content nil)
 144       (replace-match "")
 145       (while (looking-at re2)
 146         (delete-region (point) (1+ (point-at-eol))))
 147       (while (looking-at org-drawer-regexp)
 148         (setq beg (point))
 149         (if (re-search-forward org-property-end-re nil t)
 150             (delete-region beg (1+ (match-end 0)))))
 151       (setq beg (point))
 152       (when (and (re-search-forward "^\\(\\*+\\) " nil t)
 153                  (= (length (match-string 1)) (length stars))
 154                  (progn (goto-char (match-end 0))
 155                         (looking-at "END[ \t]*$")))
 156         (setq content (buffer-substring beg (1- (point-at-bol))))
 157         (delete-region beg (1+ (match-end 0))))
 158       (goto-char beg)
 159       (when (and org-inlinetask-export
 160                  (string-match org-complex-heading-regexp headline))
 161         (when (memq org-inlinetask-export '(arrow+content arrow))
 162           (insert "\n\n\\Rightarrow\\Rightarrow\\Rightarrow *"
 163                   (if (match-end 2) (concat (match-string 2 headline) " ") "")
 164                   (match-string 4 headline) "*\n"))
 165         (when (and content (eq org-inlinetask-export 'arrow+content))
 166           (insert "#+BEGIN_EXAMPLE\n" content "\n#+END_EXAMPLE\n"))
 167         (insert "\n")))))
 168
 169 (defun org-inlinetask-fontify (limit)
 170   "Fontify the inline tasks."
 171   (let* ((nstars (if org-odd-levels-only
 172                      (1- (* 2 (or org-inlinetask-min-level 200)))
 173                    (or org-inlinetask-min-level 200)))
 174          (re (concat "^\\(\\*\\)\\(\\*\\{"
 175                     (format "%d" (- nstars 3))
 176                     ",\\}\\)\\(\\*\\* .*\\)")))
 177     (while (re-search-forward re limit t)
 178       (add-text-properties (match-beginning 1) (match-end 1)
 179                            '(face org-warning font-lock-fontified t))
 180       (add-text-properties (match-beginning 2) (match-end 2)
 181                            '(face org-hide font-lock-fontified t))
 182       (add-text-properties (match-beginning 3) (match-end 3)
 183                            '(face shadow font-lock-fontified t)))))
 184
 185 (defun org-inlinetask-remove-END-maybe ()
 186   "Remove an END line when present."
 187   (when (looking-at (format "\\([ \t]*\n\\)*\\*\\{%d,\\}[ \t]+END[ \t]*$"
 188                             org-inlinetask-min-level))
 189     (replace-match "")))
 190
 191 (eval-after-load "org-exp"
 192   '(add-hook 'org-export-preprocess-after-tree-selection-hook
 193              'org-inlinetask-export-handler))
 194 (eval-after-load "org"
 195   '(add-hook 'org-font-lock-hook 'org-inlinetask-fontify))
 196
 197 (provide 'org-inlinetask)
 198
 199 ;;; org-inlinetask.el ends here