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;; org.el --- Outline-based notes management and organizer 
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;; Carstens outline-mode for keeping track of everything.
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;; Copyright (c) 2004, 2005 Free Software Foundation
;;
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;; Author: Carsten Dominik <dominik at science dot uva dot nl>
;; Keywords: outlines, hypermedia, calendar
;; Homepage: http://www.astro.uva.nl/~dominik/Tools/org/
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;; Version: 3.05
;;
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;; This file is part of GNU Emacs.
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;;
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;; 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 2, or (at your option)
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;; any later version.

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;; 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.
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;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;;; Commentary:
;;
;; Org-mode is a mode for keeping notes, maintaining ToDo lists, and doing
;; project planning with a fast and effective plain-text system.
;;
;; Org-mode develops organizational tasks around a NOTES file that contains
;; information about projects as plain text.  Org-mode is implemented on
;; top of outline-mode - ideal to keep the content of large files well
;; structured.  It supports ToDo items, deadlines and time stamps, which
;; magically appear in the diary listing of the Emacs calendar.  Tables are
;; easily created with a built-in table editor.  Plain text URL-like links
;; connect to websites, emails (VM,RMAIL,WANDERLUST), Usenet messages (Gnus),
;; BBDB entries, and any files related to the projects.  For printing and
;; sharing of notes, an Org-mode file (or a part of it) can be exported as
;; a structured ASCII file, or as HTML.
;;
;; Installation
;; ------------
;; The instruction below assume that you have downloaded Org-mode from the
;; web.  If Org-mode is part of the Emacs distribution or an XEmacs package,
;; you only need to add to .emacs the last three lines of Lisp code listed
;; below, i.e. the `auto-mode-alist' modification and the global key bindings.
;;
;; Byte-compile org.el and put it on your load path.  Then copy the
;; following lines into .emacs.  The last two lines define *global*
;; keys for the commands `org-store-link' and `org-agenda' - please
;; choose suitable keys yourself.
;;
;;    (autoload 'org-mode "org" "Org mode" t)
;;    (autoload 'org-diary "org" "Diary entries from Org mode")
;;    (autoload 'org-agenda "org" "Multi-file agenda from Org mode" t)
;;    (autoload 'org-store-link "org" "Store a link to the current location" t)
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;;    (autoload 'orgtbl-mode "org" "Org tables as a minor mode" t)
;;    (autoload 'turn-on-orgtbl "org" "Org tables as a minor mode")
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;;    (add-to-list 'auto-mode-alist '("\\.org$" . org-mode))
;;    (define-key global-map "\C-cl" 'org-store-link)
;;    (define-key global-map "\C-ca" 'org-agenda)
;;
;; This will put all files with extension ".org" into Org-mode.  As an
;; alternative, make the first line of a file look like this:
;;
;;     MY PROJECTS    -*- mode: org; -*-
;;
;; which will select Org-mode for this buffer no matter what the file's
;; name is.
;;
;; Documentation
;; -------------
;; The documentation of Org-mode can be found in the TeXInfo file.
;; This distribution also contains a PDF version of it.  At the homepage
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;; of Org-mode, you can read online the same text online as HTML.
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;;
;; Changes:
;; -------
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;; Version 3.05
;;    - Agenda entries from the diary are linked to the diary file, so
;;      adding and editing diary entries can be done directly from the agenda.
;;    - Many calendar/diary commands available directly from agenda.
;;    - Field copying in tables with S-RET does increment.
;;    - C-c C-x C-v extracts the visible part of the buffer for printing.
;;    - Moving subtrees up and down preserves the whitespace at the tree end.
;;
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;; Version 3.04
;;    - Table editor optimized to need fewer realignments, and to keep
;;      table shape when typing in fields.
;;    - A new minor mode, orgtbl-mode, introduces the Org-mode table editor
;;      into arbitrary major modes.
;;    - Fixed bug with realignment in XEmacs.
;;    - Startup options can be set with special #+STARTUP line.
;;    - Heading following a match in org-occur can be suppressed.
;;
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;; Version 3.03
;;    - Copyright transfer to the FSF.
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;;    - Effect of C-u and C-u C-u in org-timeline swapped.
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;;    - Timeline now always contains today, and `.' jumps to it.
;;    - Table editor:
;;      - cut and paste of regtangular regions in tables
;;      - command to convert org-mode table to table.el table and back
;;      - command to treat several cells like a paragraph and fill it
;;      - command to convert a buffer region to a table
;;      - import/export tables as tab-separated files (exchange with Excel)
;;    - Agenda:
;;      - Sorting mechanism for agenda items rewritten from scratch.
;;      - Sorting fully configurable.
;;      - Entries specifying a time are sorted together.
;;    - Completion also covers option keywords after `#-'.
;;    - Bug fixes.
;;
;; Version 3.01
;;    - New reference card, thanks to Philip Rooke for creating it.
;;    - Single file agenda renamed to "Timeline".  It no longer shows
;;      warnings about upcoming deadlines/overdue scheduled items.
;;      That functionality is now limited to the (multifile) agenda.
;;    - When reading a date, the calendar can be manipulated with keys.
;;    - Link support for RMAIL and Wanderlust (from planner.el, untested)
;;    - Minor bug fixes and documentation improvements.
;;
;; Version 3.00
;;    - Multifile Agenda shows current entries from many different files.
;;    - TeXInfo documentation (thanks to Christian Egli for the conversion).
;;    - Additional applications for TODO keywords, see documentation.
;;      Different files may have different TODO keywords etc.
;;    - Priorities for TODO items.
;;    - The browser mode used by `org-remember-handler' is improved.
;;    - Images get inlined in HTML export (thanks to Carsten Wimmer).
;;    - File links can contain line numbers, like file:/usr/etc/config:255
;;    - Minor bug fixes.
;;
;; Version 2.10
;;    - TODO entries can have additional states besides TODO and DONE.
;;      See new variable `org-todo-keywords'.
;;    - TODO keywords can be interpreted as categories.  See variable
;;      `org-todo-interpretation'.
;;    - M-TAB completion on TODO keywords, TeX symbols, and normal words.
;;    - All keywords (like TODO, DEADLINE etc) are configurable.
;;    - Cursor positioning optimized after pro/demotion and TODO cycling.
;;    - Emphasizing in HTML works now for *bold*, /italic/ and _underline_.
;;    - New commands to kill, copy and yank entire subtrees.  Yanking
;;      modifies the level of the tree before insertion.
;;    - New command `org-goto' (C-c C-j) to quickly move to other locations
;;      in the buffer without affecting outline visibility.
;;    - Hooks for John Wiegley's remember.el.
;;    - `org-read-date' pops up calendar for date selection with the mouse.
;;      See variable `org-popup-calendar-for-date-prompt'.  
;;
;; Version 2.6
;;    - TODO items can be SCHEDULED to a certain date.
;;    - Expired DEADLINEs are ignored if in an entry marked DONE.
;;    - From the diary or time-sorted view (C-c C-r), C-c C-t can be used to
;;      change the TODO state of an item remotely.
;;    - Horizontal computations in table editor. See `org-table-eval-formula'.
;;    - Fixed bug with summing tables (command `org-table-sum', `C-c +').
;;    - Calendar window follows the timestamp when a timestamp is changed.
;;      New variable `org-calendar-follow-timestamp-change'.
;;    - Time-sorted view (`org-diary-view', C-c C-r) now uses the prefix
;;      argument to force inclusion of unscheduled TODO items.
;;    - New variable `org-confirm-shell-links' to turn of safety query.
;;    - New variable `org-open-non-existing-files'.
;;
;; Version 2.4
;;    - A time-sorted view on all time stamps can be created with C-c C-r.
;;    - Timestamps and Deadlines can be shown in the Emacs diary.
;;    - Date ranges introduced.
;;    - Time-string formats are no longer configurable.
;;    - Vertical lines in tables can be made invisible with `C-c |'.
;;    - New "link" type to execute shell commands, like "shell:ls *.org"
;;    - Upon export, "myfile.org" becomes "myfile.html" or "myfile.txt",
;;      instead of "myfile.org.html" or "myfile.org.txt".
;;    - When the cursor is in the white space at the beginning of a line,
;;      TAB removes the whitespace before indenting again.
;;
;; Version 2.0
;;    - Windows (NT/2000) support.
;;    - Works with both Emacs and XEmacs.
;;    - Fully automatic table editor.
;;    - New link types into Gnus, VM and BBDB.
;;    - Other link system changes
;;      - Time stamps are treated as links to the calendar.
;;      - Easy creation of links with global command `org-store-link'.
;;      - Insertion of links with `C-c C-l' works differently now.
;;      - Space characters allowed as part of a link.
;;      - Options in `org-file-apps' extended.  The command may now be
;;        symbol 'emacs', or a lisp form.
;;    Please re-read the manual section about links.
;;    - Timestamp changes
;;      - `org-deadline' now prompts for a date.
;;      - A line can now contain several timestamps.  Updating of a
;;        timestamp only happens if the cursor is at the timestamp.
;;      - Changed the time-stamp-format to ISO, to make sure it will
;;        always work (non-English month names had caused problems
;;        with `parse-time-string'.).  Changing the time stamp format
;;        is not recommended.
;;    - Picture mode enhancements have been removed from org.el
;;
;; Version 1.4
;;    - Some option name changes, not backward compatible.
;;    - ASCII exporter upgrade: Table of contents.
;;    - HTML exporter upgrade: fixed-width regions, better
;;      sub/superscripts, many TeX symbols supported.
;;    - Calendar support.
;;
;; Version 1.3
;;    - HTML exporter upgrade, in particular table of contents
;;
;; Version 1.0
;;    - Initial release

;;; Code:

(eval-when-compile (require 'cl))
(require 'outline)
(require 'time-date)
(require 'easymenu)

;;; Customization variables

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(defvar org-version "3.05"
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  "The version number of the file org.el.")
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(defun org-version ()
  (interactive)
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  (message "Org-mode version %s" org-version))

;; The following two constants are for compatibility with different 
;; Emacs versions (Emacs versus XEmacs) and with different versions of
;; outline.el.  All the compatibility code in org.el is based on these two
;; constants.
(defconst org-xemacs-p (featurep 'xemacs)
  "Are we running xemacs?")
(defconst org-noutline-p (featurep 'noutline)
  "Are we using the new outline mode?")

(defgroup org nil
  "Outline-based notes management and organizer "
  :tag "Org"
  :group 'outlines
  :group 'hypermedia
  :group 'calendar)

(defgroup org-startup nil
  "Options concerning startup of Org-mode."
  :tag "Org Startup"
  :group 'org)

(defcustom org-startup-folded t
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  "Non-nil means, entering Org-mode will switch to OVERVIEW.
This can also be configured on a per-file basis by adding one of
the following lines anywhere in the buffer:

   #+STARTUP: fold
   #+STARTUP: nofold
"
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  :group 'org-startup
  :type 'boolean)

(defcustom org-startup-truncated t
  "Non-nil means, entering Org-mode will set `truncate-lines'.
This is useful since some lines containing links can be very long and
uninteresting.  Also tables look terrible when wrapped."
  :group 'org-startup
  :type 'boolean)

(defcustom org-startup-with-deadline-check nil
  "Non-nil means, entering Org-mode will run the deadline check.
This means, if you start editing an org file, you will get an
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immediate reminder of any due deadlines.
This can also be configured on a per-file basis by adding one of
the following lines anywhere in the buffer:

   #+STARTUP: dlcheck
   #+STARTUP: nodlcheck
"
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  :group 'org-startup
  :type 'boolean)

(defcustom org-insert-mode-line-in-empty-file t
  "Non-nil means insert the first line setting Org-mode in empty files.
When the function `org-mode' is called interactively in an empty, this
normally means that the file name does not automatically trigger Org-mode.
To ensure that the file will always be in Org-mode in the future, a
line enforcing Org-mode can be inserted into the buffer."
  :group 'org-startup
  :type 'boolean)

(defgroup org-keywords nil
  "Options concerning TODO items in Org-mode."
  :tag "Org Keywords"
  :group 'org)

(defcustom org-todo-keywords '("TODO" "DONE")
  "List of TODO entry keywords.\\<org-mode-map>
By default, this is '(\"TODO\" \"DONE\").  The last entry in the list is
considered to mean that the entry is \"done\".  All the other mean that
action is required, and will make the entry show up in todo lists, diaries
etc.
The command \\[org-todo] cycles an entry through these states, and an
additional state where no keyword is present.  For details about this
cycling, see also the variable `org-todo-interpretation'
Changes become only effective after restarting Emacs."
  :group 'org-keywords
  :type '(repeat (string :tag "Keyword")))

(defcustom org-todo-interpretation 'sequence
  "Controls how TODO keywords are interpreted.\\<org-mode-map>
Possible values are `sequence' and `type'.
This variable is only relevant if `org-todo-keywords' contains more than two
states.  There are two ways how these keywords can be used:

- As a sequence in the process of working on a TODO item, for example
  (setq org-todo-keywords '(\"TODO\" \"STARTED\" \"VERIFY\" \"DONE\")
        org-todo-interpretation 'sequence)

- As different types of TODO items, for example
  (setq org-todo-keywords '(\"URGENT\" \"RELAXED\" \"REMIND\" \"FOR_TOM\" \"DONE\")
        org-todo-interpretation 'type)

When the states are interpreted as a sequence, \\[org-todo] always cycles
to the next state, in order to walk through all different states.  So with
\\[org-todo], you turn an empty entry into the state TODO.  When you started
working on the item, you use \\[org-todo] again to switch it to \"STARTED\",
later to VERIFY and finally to DONE.

When the states are interpreted as types, \\[org-todo] still cycles through
when it is called several times in direct succession, in order to initially
select the type.  However, if not called immediately after a previous
\\[org-todo], it switches from each type directly to DONE.  So with the
above example, you could use `\\[org-todo] \\[org-todo]' to label an entry
RELAXED.  If you later return to this entry and press \\[org-todo] again,
RELAXED will not be changed REMIND, but directly to DONE.

You can create a large number of types.  To initially select a
type, it is then best to use C-u \\[org-todo] in order to specify the
type with completion.  Of course, you can also type the keyword
directly into the buffer.  M-TAB completes TODO keywords at the
beginning of a headline."
  :group 'org-keywords
  :type '(choice (const sequence)
                 (const type)))

(defcustom org-default-priority ?B
  "The default priority of TODO items.
This is the priority an item get if no explicit priority is given."
  :group 'org-keywords
  :type 'character)

(defcustom org-lowest-priority ?C
  "The lowest priority of TODO items.  A character like ?A, ?B etc."
  :group 'org-keywords
  :type 'character)

(defcustom org-deadline-string "DEADLINE:"
  "String to mark deadline entries.
A deadline is this string, followed by a time stamp.  Should be a word,
terminated by a colon.  You can insert a schedule keyword and
a timestamp with \\[org-deadline].
Changes become only effective after restarting Emacs."
  :group 'org-keywords
  :type 'string)

(defcustom org-scheduled-string "SCHEDULED:"
  "String to mark scheduled TODO entries.
A schedule is this string, followed by a time stamp.  Should be a word,
terminated by a colon.  You can insert a schedule keyword and
a timestamp with \\[org-schedule].
Changes become only effective after restarting Emacs."
  :group 'org-keywords
  :type 'string)

(defcustom org-comment-string "COMMENT"
  "Entries starting with this keyword will never be exported.
An entry can be toggled between COMMENT and normal with
\\[org-toggle-comment].
Changes become only effective after restarting Emacs."
  :group 'org-keywords
  :type 'string)

(defcustom org-after-todo-state-change-hook nil
  "Hook which is run after the state of a TODO item was changed.
The new state (a string with a todo keyword, or nil) is available in the
lisp variable `state'."
  :group 'org-keywords
  :type 'hook)

;; Variables for pre-computed regular expressions, all buffer local
(defvar org-todo-kwd-priority-p nil
  "Do TODO items have priorities?")
(make-variable-buffer-local 'org-todo-kwd-priority-p)
(defvar org-todo-kwd-max-priority nil
  "Maximum priority of TODO items")
(make-variable-buffer-local 'org-todo-kwd-max-priority)
(defvar org-ds-keyword-length 12
  "Maximum length of the Deadline and SCHEDULED keywords.")
(make-variable-buffer-local 'org-ds-keyword-length)
(defvar org-done-string nil
  "The last string in `org-todo-keywords', indicating an item is DONE.")
(make-variable-buffer-local 'org-done-string)
(defvar org-todo-regexp nil
  "Matches any of the TODO state keywords.")
(make-variable-buffer-local 'org-todo-regexp)
(defvar org-not-done-regexp nil
  "Matches any of the TODO state keywords except the last one.")
(make-variable-buffer-local 'org-not-done-regexp)
(defvar org-todo-line-regexp nil
  "Matches a headline and puts TODO state into group 2 if present.")
(make-variable-buffer-local 'org-todo-line-regexp)
(defvar orb-nl-done-regexp nil
  "Matches newline followed by a headline with the DONE keyword.")
(make-variable-buffer-local 'orb-nl-done-regexp)
(defvar org-looking-at-done-regexp nil
  "Matches the DONE keyword a point.")
(make-variable-buffer-local 'org-looking-at-done-regexp)
(defvar org-deadline-regexp nil
  "Matches the DEADLINE keyword.")
(make-variable-buffer-local 'org-deadline-regexp)
(defvar org-deadline-time-regexp nil
  "Matches the DEADLINE keyword together with a time stamp.")
(make-variable-buffer-local 'org-deadline-time-regexp)
(defvar org-deadline-line-regexp nil
  "Matches the DEADLINE keyword and the rest of the line.")
(make-variable-buffer-local 'org-deadline-line-regexp)
(defvar org-scheduled-regexp nil
  "Matches the SCHEDULED keyword.")
(make-variable-buffer-local 'org-scheduled-regexp)
(defvar org-scheduled-time-regexp nil
  "Matches the SCHEDULED keyword together with a time stamp.")
(make-variable-buffer-local 'org-scheduled-time-regexp)

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(defun org-set-regexps-and-options ()
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  "Precompute regular expressions for current buffer."
  (when (eq major-mode 'org-mode)
    (let ((re (org-make-options-regexp
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               '("CATEGORY" "SEQ_TODO" "PRI_TODO" "TYP_TODO" "STARTUP")))
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          (splitre "[ \t]+")
          kwds int key value cat)
      (save-restriction
        (save-excursion
          (widen)
          (goto-char (point-min))
          (while (re-search-forward re nil t)
            (setq key (match-string 1) value (match-string 2))
            (cond 
             ((equal key "CATEGORY")
              (setq cat (intern (car (org-split-string value splitre)))))
             ((equal key "SEQ_TODO")
              (setq int 'sequence
                    kwds (append kwds (org-split-string value splitre))))
             ((equal key "PRI_TODO")
              (setq int 'priority
                    kwds (append kwds (org-split-string value splitre))))
             ((equal key "TYP_TODO")
              (setq int 'type
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                    kwds (append kwds (org-split-string value splitre))))
             ((equal key "STARTUP")
              (let ((opts (org-split-string value splitre))
                    (set '(("fold" org-startup-folded t)
                           ("nofold" org-startup-folded nil)
                           ("dlcheck" org-startup-with-deadline-check t)
                           ("nodlcheck" org-startup-with-deadline-check nil)))
                    l var val)
                (while (setq l (assoc (pop opts) set))
                  (setq var (nth 1 l) val (nth 2 l))
                  (set (make-local-variable var) val)))))             
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            )))
      (and cat (set (make-local-variable 'org-category) cat))
      (and kwds (set (make-local-variable 'org-todo-keywords) kwds))
      (and int (set (make-local-variable 'org-todo-interpretation) int)))
    ;; Compute the regular expressions and other local variables
    (setq org-todo-kwd-priority-p (equal org-todo-interpretation 'priority)
          org-todo-kwd-max-priority (1- (length org-todo-keywords))
          org-ds-keyword-length (+ 2 (max (length org-deadline-string)
                                          (length org-scheduled-string)))
          org-done-string 
          (nth (1- (length org-todo-keywords)) org-todo-keywords)
          org-todo-regexp
          (concat "\\<\\(" (mapconcat 'regexp-quote org-todo-keywords
                                      "\\|") "\\)\\>")
          org-not-done-regexp
          (concat "\\<\\("
                  (mapconcat 'regexp-quote
                             (nreverse (cdr (reverse org-todo-keywords)))
                             "\\|")
                  "\\)\\>")
          org-todo-line-regexp
          (concat "^\\(\\*+\\)[ \t]*\\("
                  (mapconcat 'regexp-quote org-todo-keywords "\\|")
                  "\\)? *\\(.*\\)")
          orb-nl-done-regexp
          (concat "[\r\n]\\*+[ \t]+" org-done-string "\\>")
          org-looking-at-done-regexp (concat "^" org-done-string "\\>")
          org-deadline-regexp (concat "\\<" org-deadline-string)
          org-deadline-time-regexp
          (concat "\\<" org-deadline-string " *<\\([^>]+\\)>")
          org-deadline-line-regexp
          (concat "\\<\\(" org-deadline-string "\\).*")
          org-scheduled-regexp
          (concat "\\<" org-scheduled-string)
          org-scheduled-time-regexp
          (concat "\\<" org-scheduled-string " *<\\([^>]+\\)>"))
    (org-set-font-lock-defaults)))

(defgroup org-time nil
  "Options concerning time stamps and deadlines in Org-mode."
  :tag "Org Time"
  :group 'org)

(defcustom org-deadline-warning-days 30
  "No. of days before expiration during which a deadline becomes active.
This variable governs the display in the org file."
  :group 'org-time
  :type 'number)

(defcustom org-popup-calendar-for-date-prompt t
  "Non-nil means, pop up a calendar when prompting for a date.
In the calendar, the date can be selected with mouse-1.  However, the
minibuffer will also be active, and you can simply enter the date as well.
When nil, only the minibuffer will be available."
  :group 'org-time
  :type 'number)

(defcustom org-calendar-follow-timestamp-change t
  "Non-nil means, make the calendar window follow timestamp changes.
When a timestamp is modified and the calendar window is visible, it will be
moved to the new date."
  :group 'org-time
  :type 'boolean)

(defgroup org-agenda nil
  "Options concerning agenda display Org-mode."
  :tag "Org Agenda"
  :group 'org)

(defcustom org-agenda-files nil
  "A list of org files for agenda/diary display.
Entries are added to this list with \\[org-add-file] and removed with
\\[org-remove-file].  You can also use customize to edit the list."
  :group 'org-agenda
  :type '(repeat file))

(defcustom org-select-timeline-window t
  "Non-nil means, after creating a timeline, move cursor into Timeline window.
When nil, cursor will remain in the current window."
  :group 'org-agenda
  :type 'boolean)

(defcustom org-select-agenda-window t
  "Non-nil means, after creating an agenda, move cursor into Agenda window.
When nil, cursor will remain in the current window." 
  :group 'org-agenda
  :type 'boolean)

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(defcustom org-fit-agenda-window t
  "Non-nil means, change windo size of agenda to fit content."
  :group 'org-agenda
  :type 'boolean)

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(defcustom org-agenda-show-all-dates t
  "Non-nil means, `org-agenda' shows every day in the selected range.
When nil, only the days which actually have entries are shown."
  :group 'org-agenda
  :type 'boolean)

;; FIXME: First day of month works only for current month because it would
;; require a variable ndays treatment.
(defcustom org-agenda-start-on-weekday 1
  "Non-nil means, start the overview always on the specified weekday.
0 Denotes Sunday, 1 denotes Monday etc.
When nil, always start on the current day."
  :group 'org-agenda
  :type '(choice (const :tag "Today" nil)
                 (const :tag "First day of month" t)
                 (number :tag "Weekday No.")))

(defcustom org-agenda-ndays 7
  "Number of days to include in overview display."
  :group 'org-agenda
  :type 'number)

(defcustom org-agenda-include-all-todo t
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  "Non-nil means, the multifile agenda will always contain all TODO entries.
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When nil, date-less entries will only be shown if `org-agenda' is called
with a prefix argument.
When non-nil, the TODO entries will be listed at the top of the agenda, before
the entries for specific days." 
  :group 'org-agenda
  :type 'boolean)

(defcustom org-agenda-include-diary nil
  "Non-nil means, when preparing the agenda, also get the
entries from the emacs calendars diary."
  :group 'org-agenda
  :type 'boolean)


(defcustom org-agenda-sorting-strategy '(time-up category-keep priority-down)
  "Sorting structure for the agenda items of a single day.
This is a list of symbols which will be used in sequence to determine
if an entry should be listed before another entry.  The following
symbols are recognized.

time-up         Put entries with time-of-day indications first, early first
time-down       Put entries with time-of-day indications first, late first
category-keep   Keep the default order of categories, corresponding to the
                sequence in `org-agenda-files'.
category-up     Sort alphabetically by category, A-Z.
category-down   Sort alphabetically by category, Z-A.
priority-up     Sort numerically by priority, high priority last.
priority-down   Sort numerically by priority, high priority first.

The different possibilities will be tried in sequence, and testing stops
if one comparison returns a \"not-equal\".  For example, the default
    '(time-up category-keep priority-down)
means: Pull out all entries having a specified time of day and sort them,
in order to make a time schedule for the current day the first thing in the
agenda listing for the day.  Of the entries without a time indication, keep
the grouped in categories, don't sort the categories, but keep them in
the sequence given in `org-agenda-files'.  Within each category sort by
priority.

Leaving out the `category-keep' would mean that items will be sorted across
categories by priority."
  :group 'org-agenda
  :type '(repeat 
          (choice
           (const time-up)
           (const time-down)
           (const category-keep)
           (const category-up)
           (const category-down)
           (const priority-up)
           (const priority-down))))

(defcustom org-sort-agenda-notime-is-late t
  "Non-nil means, items without time are considered late.
This is only relevant for sorting.  When t, items which have no explicit
time like 15:30 will be considered as 24:01, i.e. later than any items which
do have a time.  When nil, the default time is before 0:00."
  :group 'org-agenda
  :type 'boolean)

(defvar org-category nil
  "Variable used by org files to set a category for agenda display.
Such files should use a file variable to set it, for example

   -*- mode: org; org-category: \"ELisp\"

If the file does not specify a category, the file's base name
is used instead.")

(defgroup org-structure nil
  "Options concerning structure editing in Org-mode."
  :tag "Org Structure"
  :group 'org)

(defcustom org-adapt-indentation t
  "Non-nil means, adapt indentation when promoting and demoting.
When this is set and the *entire* text in an entry is indented, the
indentation is increased by one space in a demotion command, and
decreased by one in a promotion command.  If any line in the entry
body starts at column 0, indentation is not changed at all."
  :group 'org-structure
  :type 'boolean)

(defcustom org-cycle-emulate-tab t
  "Where should `org-cycle' emulate TAB.
nil    Never
white  Only in completely white lines
t      Everywhere except in headlines"
  :group 'org-structure
  :type '(choice (const :tag "Never" nil)
		 (const :tag "Only in completely white lines" white)
		 (const :tag "Everywhere except in headlines" t)
		 ))

(defconst org-time-stamp-formats '("<%Y-%m-%d %a>" . "<%Y-%m-%d %a %H:%M>")
  "Formats for `format-time-string' which are used for time stamps.
It is not recommended to change this constant.")

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(defcustom org-show-following-heading t
  "Non-nil means, show heading following match in `org-occur'.
When doing an `org-occur' it is useful to show the headline which
follows the match, even if they do not match the regexp. This makes it
easier to edit directly inside the sparse tree. However, if you use
org-occur mainly as an overview, the following headlines are
unnecessary clutter."
  :group 'org-structure
  :type 'boolean)



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(defgroup org-link nil
  "Options concerning links in Org-mode."
  :tag "Org Link"
  :group 'org)

(defcustom org-allow-space-in-links t
  "Non-nil means, file names in links may contain space characters.
When nil, it becomes possible to put several links into a line."
  :group 'org-link
  :type 'boolean)

(defcustom org-line-numbers-in-file-links t
  "Non-nil means, file links from `org-store-link' contain line numbers.
The line number will be added to the file name with :NNN and interpreted
by the command `org-open-at-point'.
Using a prefix arg to the command \\[org-store-link] (`org-store-link')
negates this setting for the duration of the command."
  :group 'org-link
  :type 'boolean)

(defcustom org-keep-stored-link-after-insertion nil
  "Non-nil means, keep link in list for entire session.

The command `org-store-link' adds a link pointing to the current
location to an internal list. These links accumulate during a session.
The command `org-insert-link' can be used to insert links into any
Org-mode file (offering completion for all stored links).  When this
option is nil, every link which has been inserted once using `C-c C-l'
will be removed from the list, to make completing the unused links
more efficient."
  :group 'org-link
  :type 'boolean)

(defcustom org-link-frame-setup
  '((vm . vm-visit-folder-other-frame)
    (gnus . gnus-other-frame)
    (file . find-file-other-window))
  "Setup the frame configuration for following links.
When following a link with Emacs, it may often be useful to display
this link in another window or frame.  This variable can be used to
set this up for the different types of links.
For VM, use any of
    vm-visit-folder
    vm-visit-folder-other-frame
For Gnus, use any of
    gnus
    gnus-other-frame
For FILE, use any of
    find-file
    find-file-other-window
    find-file-other-frame
For the calendar, use the variable `calendar-setup'.
For BBDB, it is currently only possible to display the matches in
another window."
  :group 'org-link
  :type '(list
          (cons (const vm)
                (choice
                 (const vm-visit-folder)
                 (const vm-visit-folder-other-window)
                 (const vm-visit-folder-other-frame)))
          (cons (const gnus)
                (choice
                 (const gnus)
                 (const gnus-other-frame)))
          (cons (const file)
                (choice
                 (const find-file)
                 (const find-file-other-window)
                 (const find-file-other-frame)))))

(defcustom org-usenet-links-prefer-google nil
  "Non-nil means, `org-store-link' will create web links to google groups.
When nil, Gnus will be used for such links.
Using a prefix arg to the command \\[org-store-link] (`org-store-link')
negates this setting for the duration of the command."
  :group 'org-link
  :type 'boolean)

(defcustom org-open-non-existing-files nil
  "Non-nil means, `org-open-file' will open non-existing file.
When nil, an error will be generated."
  :group 'org-link
  :type 'boolean)

(defcustom org-confirm-shell-links t
  "Non-nil means, ask for confirmation before executing shell links.
The default is true, to keep new users from shooting into their own foot."
  :group 'org-link
  :type 'boolean)

(defconst org-file-apps-defaults-linux
  '((t        . emacs)
    ("jpg"    . "xv %s")
    ("gif"    . "xv %s")
    ("ppm"    . "xv %s")
    ("pgm"    . "xv %s")
    ("pbm"    . "xv %s")
    ("tif"    . "xv %s")
    ("png"    . "xv %s")
    ("ps"     . "gv %s")
    ("ps.gz"  . "gv %s")
    ("eps"    . "gv %s")
    ("eps.gz" . "gv %s")
    ("dvi"    . "xdvi %s")
    ("mpeg"   . "plaympeg %s")
    ("mp3"    . "plaympeg %s")
    ("fig"    . "xfig %s")
    ("pdf"    . "acroread %s")
    ("doc"    . "soffice %s")
    ("ppt"    . "soffice %s")
    ("pps"    . "soffice %s")
    ("html"   . "netscape -remote openURL(%s,new-window)")
    ("htm"    . "netscape -remote openURL(%s,new-window)")
    ("xs"     . "soffice %s"))
  "Default file applications on a UNIX/LINUX system.
See `org-file-apps'.")

(defconst org-file-apps-defaults-macosx
  '((t        . "open %s")
    ("ps"     . "gv %s")
    ("ps.gz"  . "gv %s")
    ("eps"    . "gv %s")
    ("eps.gz" . "gv %s")
    ("dvi"    . "xdvi %s")
    ("fig"    . "xfig %s"))
  "Default file applications on a MacOS X system.
The system \"open\" is known as a default, but we use X11 applications
for some files for which the OS does not have a good default.
See `org-file-apps'.")

(defconst org-file-apps-defaults-windowsnt
  '((t        . (w32-shell-execute "open" file)))
  "Default file applications on a Windows NT system.
The system \"open\" is used for most files.
See `org-file-apps'.")

(defcustom org-file-apps
  '(
    ("txt" . emacs)
    ("tex" . emacs)
    ("ltx" . emacs)
    ("org" . emacs)
    ("el"  . emacs)
    )
  "External applications for opening `file:path' items in a document.
Org-mode uses system defaults for different file types, but
you can use this variable to set the application for a given file
extension.  The entries in this list are cons cells with a file extension
and the corresponding command.  Possible values for the command are:
 `emacs'     The file will be visited by the current Emacs process.
 `default'   Use the default application for this file type.
 string      A command to be executed by a shell. %s will be replaced
             by the path to the file.
 sexp        A lisp form which will be evaluated.  The file path will
             be available in the lisp variable `file'.
For more examples, see the system specific constants
`org-file-apps-defaults-macosx'
`org-file-apps-defaults-windowsnt'
`org-file-apps-defaults-linux'."
  :group 'org-link
  :type '(repeat
          (cons (string :tag "Extension")
                (choice :value ""
                 (const :tag "Visit with Emacs" 'emacs)
                 (const :tag "Use system default" 'default)
                 (string :tag "Command")
                 (sexp :tag "Lisp form")))))


(defgroup org-remember nil
  "Options concerning interaction with remember.el."
  :tag "Org Remember"
  :group 'org)

(defcustom org-directory "~/org"
  "Directory with org files.
This directory will be used as default to prompt for org files.
Used by the hooks for remember.el."
  :group 'org-remember
  :type 'directory)

(defcustom org-default-notes-file "~/.notes"
  "Default target for storing notes.
Used by the hooks for remember.el.  This can be a string, or nil to mean
the value of `remember-data-file'."
  :group 'org-remember
  :type '(choice
          (const :tag "Default from remember-data-file" nil)
          file))

(defcustom org-reverse-note-order nil
  "Non-nil means, store new notes at the beginning of a file or entry.
When nil, new notes will be filed to the end of a file or entry."
  :group 'org-remember
  :type '(choice
          (const :tag "Reverse always" t)
          (const :tag "Reverse never" nil)
          (repeat :tag "By file name regexp"
                  (cons regexp boolean))))

(defgroup org-table nil
  "Options concerning tables in Org-mode."
  :tag "Org Table"
  :group 'org)

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(defcustom org-enable-table-editor 'optimized
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  "Non-nil means, lines starting with \"|\" are handled by the table editor.
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When nil, such lines will be treated like ordinary lines.

When equal to the symbol `optimized', the table editor will be optimized to
do the following
- Use automatic overwrite mode in front of whitespace in table fields.
  This make the structure of the table stay in tact as long as the edited
  field does not exceed the column width.
- Minimize the number of realigns.  Normally, the table is aligned each time
  TAB or RET are pressed to move to another field.  With optimization this
  happens only if changes to a field might have  changed the column width.
Optimization requires replacing the functions `self-insert-command',
`delete-char', and `backward-delete-char' in Org-mode buffers, with a
slight (in fact: unnoticable) speed impact for normal typing.  Org-mode is
very good at guessing when a re-align will be necessary, but you can always
force one with `C-c C-c'.

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If you would like to use the optimized version in Org-mode, but the un-optimized
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version in OrgTbl-mode, see the variable `orgtbl-optimized'.

This variable can be used to turn on and off the table editor during a session,
but in order to toggle optimization, a restart is required."
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  :group 'org-table
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  :type '(choice
          (const :tag "off" nil)
          (const :tag "on" t)
          (const :tag "on, optimized" optimized)))
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(defcustom org-table-default-size "5x2"
  "The default size for newly created tables, Columns x Rows."
  :group 'org-table
  :type 'string)

(defcustom org-table-automatic-realign t
  "Non-nil means, automatically re-align table when pressing TAB or RETURN.
When nil, aligning is only done with \\[org-table-align], or after column
removal/insertion."
  :group 'org-table
  :type 'boolean)

(defcustom org-table-spaces-around-separators '(1 . 1)
  "The number of spaces to be placed before and after separators."
  :group 'org-table
  :type '(cons (number :tag "Before \"|\"") (number :tag " After \"|\"")))

(defcustom org-table-spaces-around-invisible-separators '(1 . 2)
  "The number of spaces to be placed before and after separators.
This option applies when the column separators have been made invisible."
  :group 'org-table
  :type '(cons (number :tag "Before \"|\"") (number :tag " After \"|\"")))

(defcustom org-table-number-regexp "^[<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%]*$"
  "Regular expression for recognizing numbers in table columns.
If a table column contains mostly numbers, it will be aligned to the
right.  If not, it will be aligned to the left.

The default value of this option is a regular expression which allows
anything which looks remotely like a number as used in scientific
context.  For example, all of the following will be considered a
number:
    12    12.2    2.4e-08    2x10^12    4.034+-0.02    2.7(10)  >3.5

Other options offered by the customize interface are more restrictive."
  :group 'org-table
  :type '(choice
          (const :tag "Positive Integers"
                 "^[0-9]+$")
          (const :tag "Integers"
                 "^[-+]?[0-9]+$")
          (const :tag "Floating Point Numbers"
                 "^[-+]?\\([0-9]*\\.[0-9]+\\|[0-9]+\\.[0-9]*\\)$")
          (const :tag "Floating Point Number or Integer"
                 "^[-+]?\\([0-9]*\\.[0-9]+\\|[0-9]+\\.?[0-9]*\\)$")
          (const :tag "Exponential, Floating point, Integer"
                 "^[-+]?[0-9.]+\\([eEdD][-+0-9]+\\)?$")
          (const :tag "Very General Number-Like"
                 "^[<>]?[-+^.0-9]*[0-9][-+^.0-9eEdDx()%]*$")
          (string :tag "Regexp:")))

(defcustom org-table-number-fraction 0.5
  "Fraction of numbers in a column required to make the column align right.
In a column all non-white fields are considered.  If at least this
fraction of fields is matched by `org-table-number-fraction',
alignment to the right border applies."
  :group 'org-table
  :type 'number)

(defcustom org-export-highlight-first-table-line t
  "Non-nil means, highlight the first table line.
In HTML export, this means use <th> instead of <td>.
In tables created with table.el, this applies to the first table line.
In Org-mode tables, all lines before the first horizontal separator
line will be formatted with <th> tags."
  :group 'org-table
  :type 'boolean)

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(defcustom org-table-copy-increment t
  "Non-nil means, increment when copying current field with \\[org-table-copy-down]."
  :group 'org-table
  :type 'boolean)

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(defcustom org-table-tab-recognizes-table.el t
  "Non-nil means, TAB will automatically notice a table.el table.
When it sees such a table, it moves point into it and - if necessary -
calls `table-recognize-table'."
  :group 'org-table
  :type 'boolean)

(defcustom org-export-prefer-native-exporter-for-tables nil
  "Non-nil means, always export tables created with table.el natively.
Natively means, use the HTML code generator in table.el.
When nil, Org-mode's own HTML generator is used when possible (i.e. if
the table does not use row- or column-spanning).  This has the
advantage, that the automatic HTML conversions for math symbols and
sub/superscripts can be applied.  Org-mode's HTML generator is also
much faster."
  :group 'org-table
  :type 'boolean)

(defcustom org-enable-fixed-width-editor t
  "Non-nil means, lines starting with \":\" are treated as fixed-width.
This currently only means, they are never auto-wrapped.
When nil, such lines will be treated like ordinary lines."
  :group 'org-table
  :type 'boolean)

(defgroup org-export nil
  "Options for exporting org-listings."
  :tag "Org Export"
  :group 'org)

(defcustom org-export-language-setup
  '(("en"  "Author"          "Date"  "Table of Contents")
    ("da"  "Ophavsmand"      "Dato"  "Indhold")
    ("de"  "Autor"           "Datum" "Inhaltsverzeichnis")
    ("es"  "Autor"           "Fecha" "\xccndice")
    ("fr"  "Auteur"          "Date"  "Table des Mati\xe8res")
    ("it"  "Autore"          "Data"  "Indice")
    ("nl"  "Auteur"          "Datum" "Inhoudsopgave")
    ("nn"  "Forfattar"       "Dato"  "Innhold")  ;; nn = Norsk (nynorsk)
    ("sv"  "F\xf6rfattarens" "Datum" "Inneh\xe5ll"))
  "Terms used in export text, translated to different languages.
Use the variable `org-export-default-language' to set the language,
or use the +OPTION lines for a per-file setting."
  :group 'org-export
  :type '(repeat
          (list
           (string :tag "HTML language tag")
           (string :tag "Author")
           (string :tag "Date")
           (string :tag "Table of Contents"))))

(defcustom org-export-default-language "en"
  "The default language of HTML export, as a string.
This should have an association in `org-export-language-setup'"
  :group 'org-export
  :type 'string)

(defcustom org-export-headline-levels 3
  "The last level which is still exported as a headline.
Inferior levels will produce itemize lists when exported.
Note that a numeric prefix argument to an exporter function overrides
this setting.

This option can also be set with the +OPTIONS line, e.g. \"H:2\"."
  :group 'org-export
  :type 'number)

(defcustom org-export-with-section-numbers t
  "Non-nil means, add section numbers to headlines when exporting.

This option can also be set with the +OPTIONS line, e.g. \"num:t\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-with-toc t
  "Non-nil means, create a table of contents in exported files.
The TOC contains headlines with levels up to`org-export-headline-levels'.

Headlines which contain any TODO items will be marked with \"(*)\" in
ASCII export, and with red color in HTML output.

In HTML output, the TOC will be clickable.

This option can also be set with the +OPTIONS line, e.g. \"toc:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-preserve-breaks nil
  "Non-nil means, preserve all line breaks when exporting.
Normally, in HTML output paragraphs will be reformatted.  In ASCII
export, line breaks will always be preserved, regardless of this variable.

This option can also be set with the +OPTIONS line, e.g. \"\\n:t\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-inline-images t
  "Non-nil means, inline images into exported HTML pages.
The link will still be to the original location of the image file.
So if you are moving the page, lets say to your public HTML site,
you will have to move the image and maybe change the link."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-expand t
  "Non-nil means, for HTML export, treat @<...> as HTML tag.
When nil, these tags will be exported as plain text and therefore
not be interpreted by a browser.

This option can also be set with the +OPTIONS line, e.g. \"@:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-with-fixed-width t
  "Non-nil means, lines starting with \":\" will be in fixed width font.
This can be used to have preformatted text, fragments of code etc.  For
example
  : ;; Some Lisp examples
  : (while (defc cnt)
  :   (ding))
will be looking just like this in also HTML.  In ASCII export, this option
has no effect.

This option can also be set with the +OPTIONS line, e.g. \"::nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-with-tables t
  "Non-nil means, lines starting with \"|\" define a table
For example:

  | Name        | Address  | Birthday  |
  |-------------+----------+-----------|
  | Arthur Dent | England  | 29.2.2100 |

In ASCII export, this option has no effect.

This option can also be set with the +OPTIONS line, e.g. \"|:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-table-tag
  "<table border=1 cellspacing=0 cellpadding=6>"
  "The HTML tag used to start a table.
This must be a <table> tag, but you may change the options like
borders and spacing."
  :group 'org-export
  :type 'string)

(defcustom org-export-with-emphasize t
  "Non-nil means, interprete *word*, /word/, and _word_ as emphasized text.
If the export target supports emphasizing text, the word will be
typeset in bold, italic, or underlined, respectively.  Works only for
single words, but you can say: I *really* *mean* *this*.
In ASCII export, this option has no effect.

This option can also be set with the +OPTIONS line, e.g. \"*:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-match-sexp-depth 3
  "Number of stacked braces for sub/superscript matching.
This has to be set before loading org.el to be effective."
  :group 'org-export
  :type 'integer)

;; FIXME: Should () parens be removed as well in sub/superscripts?
(defcustom org-export-with-sub-superscripts t
  "Non-nil means, interprete \"_\" and \"^\" for export.
When this option is turned on, you can use TeX-like syntax for sub- and
superscripts.  Several characters after \"_\" or \"^\" will be
considered as a single item - so grouping with {} is normally not
needed.  For example, the following things will be parsed as single
sub- or superscripts.

 10^24   or   10^tau     several digits will be considered 1 item
 10^-12  or   10^-tau    a leading sign with digits or a word
 x^2-y^3                 will be read as x^2 - y^3, because items are
                         terminated by almost any nonword/nondigit char.
 x_{i^2} or   x^(2-i)    braces or parenthesis do grouping.

Still, ambiguity is possible - so when in doubt use {} to enclose the
sub/superscript.
In ASCII export, this option has no effect.

This option can also be set with the +OPTIONS line, e.g. \"^:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-with-TeX-macros t
  "Non-nil means, interprete simple TeX-like macros when exporting.
For example, HTML export converts \\alpha to &alpha; and \\AA to &Aring;.
No only real TeX macros will work here, but the standard HTML entities
for math can be used as macro names as well.  For a list of supported
names in HTML export, see the constant `org-html-entities'.
In ASCII export, this option has no effect.

This option can also be set with the +OPTIONS line, e.g. \"TeX:nil\"."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-with-timestamp nil
  "Non-nil means,  write `org-export-html-html-helper-timestamp'
into the exported html text.  Otherwise, the buffer will just be saved
to a file."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-html-helper-timestamp
  "<br><br><hr><p><!-- hhmts start --> <!-- hhmts end -->\n"
  "The HTML tag used as timestamp delimiter for HTML-helper-mode."
  :group 'org-export
  :type 'string)

(defcustom org-export-ascii-show-new-buffer t
  "Non-nil means, popup buffer containing the exported ASCII text.
Otherwise the buffer will just be saved to a file and stay hidden."
  :group 'org-export
  :type 'boolean)

(defcustom org-export-html-show-new-buffer nil
  "Non-nil means,  popup buffer containing the exported html text.
Otherwise, the buffer will just be saved to a file and stay hidden."
  :group 'org-export
  :type 'boolean)


(defgroup org-faces nil
  "Faces for highlighting in Org-mode."
  :tag "Org Faces"
  :group 'org)

(defface org-level-1-face ;; font-lock-function-name-face
  '((((type tty) (class color)) (:foreground "blue" :weight bold))
    (((class color) (background light)) (:foreground "Blue"))
    (((class color) (background dark)) (:foreground "LightSkyBlue"))
    (t (:inverse-video t :bold t)))
  "Face used for level 1 headlines."
  :group 'org-faces)

(defface org-level-2-face ;; font-lock-variable-name-face
  '((((type tty) (class color)) (:foreground "yellow" :weight light))
    (((class color) (background light)) (:foreground "DarkGoldenrod"))
    (((class color) (background dark)) (:foreground "LightGoldenrod"))
    (t (:bold t :italic t)))
  "Face used for level 2 headlines."
  :group 'org-faces)

(defface org-level-3-face ;; font-lock-keyword-face
  '((((type tty) (class color)) (:foreground "cyan" :weight bold))
    (((class color) (background light)) (:foreground "Purple"))
    (((class color) (background dark)) (:foreground "Cyan"))
    (t (:bold t)))
  "Face used for level 3 headlines."
  :group 'org-faces)

(defface org-level-4-face   ;; font-lock-comment-face
  '((((type tty pc) (class color) (background light)) (:foreground "red"))
    (((type tty pc) (class color) (background dark)) (:foreground "red1"))
    (((class color) (background light)) (:foreground "Firebrick"))
    (((class color) (background dark)) (:foreground "chocolate1"))
    (t (:bold t :italic t)))
  "Face used for level 4 headlines."
  :group 'org-faces)

(defface org-level-5-face ;; font-lock-type-face
  '((((type tty) (class color)) (:foreground "green"))
    (((class color) (background light)) (:foreground "ForestGreen"))
    (((class color) (background dark)) (:foreground "PaleGreen"))
    (t (:bold t :underline t)))
  "Face used for level 5 headlines."
  :group 'org-faces)

(defface org-level-6-face ;; font-lock-constant-face
  '((((type tty) (class color)) (:foreground "magenta"))
    (((class color) (background light)) (:foreground "CadetBlue"))
    (((class color) (background dark)) (:foreground "Aquamarine"))
    (t (:bold t :underline t)))
  "Face used for level 6 headlines."
  :group 'org-faces)

(defface org-level-7-face ;; font-lock-builtin-face
  '((((type tty) (class color)) (:foreground "blue" :weight light))
    (((class color) (background light)) (:foreground "Orchid"))
    (((class color) (background dark)) (:foreground "LightSteelBlue"))
    (t (:bold t)))
  "Face used for level 7 headlines."
  :group 'org-faces)

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(defface org-level-8-face ;; font-lock-string-face
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  '((((type tty) (class color)) (:foreground "green"))
    (((class color) (background light)) (:foreground "RosyBrown"))
    (((class color) (background dark)) (:foreground "LightSalmon"))
    (t (:italic t)))
  "Face used for level 8 headlines."
  :group 'org-faces)

(defface org-warning-face ;; font-lock-warning-face
  '((((type tty) (class color)) (:foreground "red"))
    (((class color) (background light)) (:foreground "Red" :bold t))
    (((class color) (background dark)) (:foreground "Pink" :bold t))
    (t (:inverse-video t :bold t)))
  "Face for deadlines and TODO keyords."
  :group 'org-faces)

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(defcustom org-fontify-done-headline nil
  "Non-nil means, change the face of a headline if it is marked DONE.
Normally, only the TODO/DONE keyword indicates the state of a headline.
When this is non-nil, the headline after the keyword is set to the
`org-headline-done-face' as an additional indication."
  :group 'org-faces
  :type 'boolean)

(defface org-headline-done-face ;; font-lock-string-face
  '((((type tty) (class color)) (:foreground "green"))
    (((class color) (background light)) (:foreground "RosyBrown"))
    (((class color) (background dark)) (:foreground "LightSalmon"))
    (t (:italic t)))
  "Face used to indicate that a headline is DONE.  See also the variable
`org-fontify-done-headline'."
  :group 'org-faces)

;; Inheritance does not yet work for xemacs. So we just copy...
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(defface org-deadline-announce-face
  '((((type tty) (class color)) (:foreground "blue" :weight bold))
    (((class color) (background light)) (:foreground "Blue"))
    (((class color) (background dark)) (:foreground "LightSkyBlue"))
    (t (:inverse-video t :bold t)))
  "Face for upcoming deadlines."
  :group 'org-faces)

(defface org-scheduled-today-face
  '((((type tty) (class color)) (:foreground "green"))
    (((class color) (background light)) (:foreground "DarkGreen"))
    (((class color) (background dark)) (:foreground "PaleGreen"))
    (t (:bold t :underline t)))
  "Face for items scheduled for a certain day."
  :group 'org-faces)

(defface org-scheduled-previously-face
  '((((type tty pc) (class color) (background light)) (:foreground "red"))
    (((type tty pc) (class color) (background dark)) (:foreground "red1"))
    (((class color) (background light)) (:foreground "Firebrick"))
    (((class color) (background dark)) (:foreground "chocolate1"))
    (t (:bold t :italic t)))
  "Face for items scheduled previously, and not yet done."
  :group 'org-faces)

(defface org-link-face 
  '((((type tty) (class color)) (:foreground "cyan" :weight bold))
    (((class color) (background light)) (:foreground "Purple"))
    (((class color) (background dark)) (:foreground "Cyan"))
    (t (:bold t)))
  "Face for links."
  :group 'org-faces)

(defface org-done-face ;; font-lock-type-face
  '((((type tty) (class color)) (:foreground "green"))
    (((class color) (background light)) (:foreground "ForestGreen" :bold t))
    (((class color) (background dark)) (:foreground "PaleGreen" :bold t))
    (t (:bold t :underline t)))
  "Face used for DONE."
  :group 'org-faces)

(defface org-table-face ;; font-lock-function-name-face
  '((((type tty) (class color)) (:foreground "blue" :weight bold))
    (((class color) (background light)) (:foreground "Blue"))
    (((class color) (background dark)) (:foreground "LightSkyBlue"))
    (t (:inverse-video t :bold t)))
  "Face used for tables."
  :group 'org-faces)

(defvar org-level-faces
  '(
    org-level-1-face
    org-level-2-face
    org-level-3-face
    org-level-4-face
    org-level-5-face
    org-level-6-face
    org-level-7-face
    org-level-8-face
    ))
(defvar org-n-levels (length org-level-faces))

;; Tell the compiler about dynamically scoped variables,
;; and variables from other packages
(eval-when-compile
  (defvar zmacs-regions)
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  (defvar original-date)
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  (defvar org-transient-mark-mode)
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  (defvar org-old-auto-fill-inhibit-regexp)
  (defvar orgtbl-mode-menu)
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  (defvar org-html-entities)
  (defvar org-goto-start-pos)
  (defvar org-cursor-color)
  (defvar org-time-was-given)
  (defvar org-ts-what)
  (defvar timecnt)
  (defvar levels-open)
  (defvar title)
  (defvar author)
  (defvar email)
  (defvar text)
  (defvar entry)
  (defvar date)
  (defvar language)
  (defvar options)
  (defvar ans1)
  (defvar ans2)
  (defvar starting-day)
  (defvar include-all-loc)
  (defvar vm-message-pointer)
  (defvar vm-folder-directory)
  (defvar wl-summary-buffer-elmo-folder)
  (defvar wl-summary-buffer-folder-name)
  (defvar gnus-group-name)
  (defvar gnus-article-current)
  (defvar w3m-current-url)
  (defvar org-selected-point)
  (defvar calendar-mode-map)
  (defvar remember-save-after-remembering)
  (defvar remember-data-file))


;;; Define the mode

(defvar org-mode-map (copy-keymap outline-mode-map)
  "Keymap for Org-mode.")

(defvar org-struct-menu)
(defvar org-org-menu)

;;;###autoload
(defun org-mode (&optional arg)
  "Outline-based notes management and organizer, alias 
\"Carstens outline-mode for keeping track of everything.\"

Org-mode develops organizational tasks around a NOTES file which
contains information about projects as plain text.  Org-mode is
implemented on top of outline-mode, which is ideal to keep the content
of large files well structured.  It supports ToDo items, deadlines and
time stamps, which magically appear in the diary listing of the Emacs
calendar.  Tables are easily created with a built-in table editor.
Plain text URL-like links connect to websites, emails (VM), Usenet
messages (Gnus), BBDB entries, and any files related to the project.
For printing and sharing of notes, an Org-mode file (or a part of it)
can be exported as a well-structured ASCII or HTML file.

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The following commands are available:
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\\{org-mode-map}"
  (interactive "P")
  (outline-mode)
  (setq major-mode 'org-mode)
  (setq mode-name "Org")
  (use-local-map org-mode-map)
  (easy-menu-add org-org-menu)
  (org-install-agenda-files-menu)
  (setq outline-regexp "\\*+")
  (if org-startup-truncated (setq truncate-lines t))
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  (org-set-regexps-and-options)
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  (set (make-local-variable 'font-lock-unfontify-region-function)
       'org-unfontify-region)
  ;; Activate before-change-function
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  (set (make-local-variable 'org-table-may-need-update) t)
  (make-local-hook 'before-change-functions)  ;; needed for XEmacs
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  (add-hook 'before-change-functions 'org-before-change-function nil
            'local)
  ;; Inhibit auto-fill for headers, tables and fixed-width lines.
  (set (make-local-variable 'auto-fill-inhibit-regexp)
       (concat "\\*"
               (if (or org-enable-table-editor org-enable-fixed-width-editor)
                   (concat
                    "\\|[ \t]*["
                    (if org-enable-table-editor "|" "")
                   (if org-enable-fixed-width-editor ":"  "")
                   "]"))))
  ;; Hook, and startup actions
  (if (or arg
          (and org-insert-mode-line-in-empty-file
               (= (point-min) (point-max))))
      (save-excursion
        (goto-char (point-min))
        (insert "    -*- mode: org -*-\n\n")))
  (run-hooks 'org-mode-hook)
  (if org-startup-with-deadline-check
      (call-interactively 'org-check-deadlines)
    (if org-startup-folded (org-cycle t))))

;;; Font-Lock stuff

(defvar org-mouse-map (make-sparse-keymap))
(define-key org-mouse-map 
  (if org-xemacs-p [button2] [mouse-2]) 'org-open-at-mouse)
(define-key org-mouse-map
  (if org-xemacs-p [button3] [mouse-3]) 'org-find-file-at-mouse)

(require 'font-lock)

(defconst org-link-regexp
  (if org-allow-space-in-links
      "\\(https?\\|ftp\\|mailto\\|file\\|news\\|bbdb\\|vm\\|wl\\|rmail\\|gnus\\|shell\\):\\([^\t\n\r]+[^ \t\n\r]\\)"
    "\\(https?\\|ftp\\|mailto\\|file\\|news\\|bbdb\\|vm\\|wl\\|rmail\\|gnus\\|shell\\):\\([^ \t\n\r]+\\)"
    )
  "Regular expression for matching links.")
(defconst org-ts-lengths
  (cons (length (format-time-string (car org-time-stamp-formats)))
        (length (format-time-string (cdr org-time-stamp-formats))))
  "This holds the lengths of the two different time formats.")
(defconst org-ts-regexp "<\\([0-9]\\{4\\}-[0-9]\\{2\\}-[0-9]\\{2\\}[^\r\n>]*\\)>"
  "Regular expression for fast time stamp matching.")
(defconst org-ts-regexp1 "\\(\\([0-9]\\{4\\}\\)-\\([0-9]\\{2\\}\\)-\\([0-9]\\{2\\}\\)\\([^0-9>\r\n]*\\)\\(\\([0-9]\\{2\\}\\):\\([0-9]\\{2\\}\\)\\)?\\)"
  "Regular expression matching time strings for analysis.")
(defconst org-ts-regexp2 (concat "<" org-ts-regexp1 ">")
  "Regular expression matching time stamps, with groups.")
(defconst org-tr-regexp (concat org-ts-regexp "--?-?" org-ts-regexp)
  "Regular expression matching a time stamp range.")
(defconst org-tsr-regexp (concat org-ts-regexp "\\(--?-?"
                                 org-ts-regexp "\\)?")
  "Regular expression matching a time stamp or time stamp range.")

(defun org-activate-links (limit)
  "Run through the buffer and add overlays to links."
  (if (re-search-forward org-link-regexp limit t)
      (progn
        (add-text-properties (match-beginning 0) (match-end 0)
                             (list 'mouse-face 'highlight
                                   'keymap org-mouse-map))
        t)))

(defun org-activate-dates (limit)
  "Run through the buffer and add overlays to links."
  (if (re-search-forward org-tsr-regexp limit t)
      (progn
        (add-text-properties (match-beginning 0) (match-end 0)
                             (list 'mouse-face 'highlight
                                   'keymap org-mouse-map))
        t)))


(defun org-font-lock-level ()
  (save-excursion
    (org-back-to-heading t)
    (- (match-end 0) (match-beginning 0))))

(defun org-set-font-lock-defaults ()
  (let ((org-font-lock-extra-keywords
         (list
          '(org-activate-links (0 'org-link-face))
          '(org-activate-dates (0 'org-link-face))
          (list (concat "^\\*+[ \t]*" org-not-done-regexp) '(1 'org-warning-face t))
          (list (concat "\\[#[A-Z]\\]") '(0 'org-warning-face t))
          (list (concat "\\<" org-deadline-string) '(0 'org-warning-face t))
          (list (concat "\\<" org-scheduled-string) '(0 'org-warning-face t))
          ;; '("\\(\\s-\\|^\\)\\(\\*\\([a-zA-Z]+\\)\\*\\)\\([^a-zA-Z*]\\|$\\)"
          ;; (3 'bold))
          ;; '("\\(\\s-\\|^\\)\\(/\\([a-zA-Z]+\\)/\\)\\([^a-zA-Z*]\\|$\\)" 
          ;; (3 'italic))
          ;; '("\\(\\s-\\|^\\)\\(_\\([a-zA-Z]+\\)_\\)\\([^a-zA-Z*]\\|$\\)" 
          ;; (3 'underline))
          '("\\<FIXME\\>" (0 'org-warning-face t))
          (list (concat "^\\*+[ \t]*\\<\\(" org-comment-string "\\)\\>")
                '(1 'org-warning-face t))
          '("^#.*" (0 'font-lock-comment-face t))
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          (if org-fontify-done-headline
              (list (concat "^[*]+ +\\<\\(" org-done-string "\\)\\(.*\\)\\>")
                    '(1 'org-done-face t) '(2 'org-headline-done-face t))
            (list (concat "^[*]+ +\\<\\(" org-done-string "\\)\\>")
                  '(1 'org-done-face t)))
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          '("^[ \t]*\\(\\(|\\|\\+-[-+]\\).*\\S-\\)"
            (1 'org-table-face t))
          '("^[ \t]*\\(:.*\\)" (1 'org-table-face t)))))
    (set (make-local-variable 'org-font-lock-keywords)
         (append
          (if org-noutline-p     ; FIXME:  I am not sure if eval will work
                                 ; on XEmacs if noutline is ever ported
              '((eval . (list "^\\(\\*+\\).*"
                              0 '(nth 
                                  (% (- (match-end 1) (match-beginning 1) 1)
                                     org-n-levels)
                                  org-level-faces)
                              nil t)))
            '(("^\\(\\(\\*+\\)[^\r\n]*\\)[\n\r]"
               (1 (nth (% (- (match-end 2) (match-beginning 2) 1)
                          org-n-levels)
                       org-level-faces)
                  nil t))))
          org-font-lock-extra-keywords))
    (set (make-local-variable 'font-lock-defaults)
         '(org-font-lock-keywords t nil nil backward-paragraph))
    (kill-local-variable 'font-lock-keywords) nil))
    
(defvar org-font-lock-keywords nil)

(defun org-unfontify-region (beg end &optional maybe_loudly)
  "Remove fontification and activation overlays from links."
  (font-lock-default-unfontify-region beg end)
  (let* ((modified (buffer-modified-p)) ;; FIXME: Why did I add this???
         (buffer-undo-list t)
         (inhibit-read-only t) (inhibit-point-motion-hooks t)
         (inhibit-modification-hooks t)
         deactivate-mark buffer-file-name buffer-file-truename)
    (remove-text-properties beg end '(mouse-face nil keymap nil))))

;;; Visibility cycling

(defvar org-cycle-global-status nil)
(defvar org-cycle-subtree-status nil)
(defun org-cycle (&optional arg)
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  "Visibility cycling for Org-mode.
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- When this function is called with a prefix argument, rotate the entire
  buffer through 3 states (global cycling)
  1. OVERVIEW: Show only top-level headlines.
  2. CONTENTS: Show all headlines of all levels, but no body text.
  3. SHOW ALL: Show everything.

- When point is at the beginning of a headline, rotate the subtree started
  by this line through 3 different states (local cycling)
  1. FOLDED:   Only the main headline is shown.
  2. CHILDREN: The main headline and the direct children are shown.  From
               this state, you can move to one of the children and
               zoom in further.
  3. SUBTREE:  Show the entire subtree, including body text.

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- When there is a numeric prefix, go ARG levels up and do a `show-subtree',
  keeping cursor position.

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- When point is not at the beginning of a headline, execute
  `indent-relative', like TAB normally does.  See the option
  `org-cycle-emulate-tab' for details.

- Special case: if point is the the beginning of the buffer and there is
  no headline in line 1, this function will act as if called with prefix arg."
  (interactive "P")

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  (if (or (and (bobp) (not (looking-at outline-regexp)))
          (equal arg '(4)))
      ;; special case:  use global cycling
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      (setq arg t))

  (cond

   ((org-at-table-p 'any)
    ;; Enter the table or move to the next field in the table
    (or (org-table-recognize-table.el)
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        (progn
          (org-table-justify-field-maybe)
          (org-table-next-field))))
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   ((eq arg t) ;; Global cycling
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    (cond
     ((and (eq last-command this-command)
	   (eq org-cycle-global-status 'overview))
      ;; We just created the overview - now do table of contents
      ;; This can be slow in very large buffers, so indicate action
      (message "CONTENTS...")
      (save-excursion
	;; Visit all headings and show their offspring
	(goto-char (point-max))
	(catch 'exit
	  (while (and (progn (condition-case nil
				 (outline-previous-visible-heading 1)
			       (error (goto-char (point-min))))
			     t)
		      (looking-at outline-regexp))
	    (show-branches)
	    (if (bobp) (throw 'exit nil))))
	(message "CONTENTS...done"))
      (setq org-cycle-global-status 'contents))
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     ((and (eq last-command this-command)
	   (eq org-cycle-global-status 'contents))
      ;; We just showed the table of contents - now show everything
      (show-all)
      (message "SHOW ALL")
      (setq org-cycle-global-status 'all))
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     (t
      ;; Default action: go to overview
      (hide-sublevels 1)
      (message "OVERVIEW")
      (setq org-cycle-global-status 'overview))))

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   ((integerp arg)
    ;; Show-subtree, ARG levels up from here.
    (save-excursion
      (org-back-to-heading)
      (outline-up-heading arg)
      (show-subtree)))

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   ((save-excursion (beginning-of-line 1) (looking-at outline-regexp))
    ;; At a heading: rotate between three different views
    (org-back-to-heading)
    (let ((goal-column 0) beg eoh eol eos nxh)
      ;; First, some boundaries
      (save-excursion
	(org-back-to-heading)  (setq beg (point))
	(save-excursion
	  (beginning-of-line 2)
	  (while (and (not (eobp))   ;; this is like `next-line'
		      (get-char-property (1- (point)) 'invisible))
	    (beginning-of-line 2)) (setq eol (point)))
	(outline-end-of-heading)   (setq eoh (point))
	(outline-end-of-subtree)   (setq eos (point))
        (outline-next-heading)     (setq nxh (point)))
      ;; Find out what to do next and set `this-command'
      (cond
       ((= eos eoh)
	;; Nothing is hidden behind this heading
        (message "EMPTY ENTRY")
        (setq org-cycle-subtree-status nil))
       ((>= eol eos)
	;; Entire subtree is hidden in one line: open it
	(show-entry)
	(show-children)
	(message "CHILDREN")
	(setq org-cycle-subtree-status 'children))
       ((and (eq last-command this-command)
	     (eq org-cycle-subtree-status 'children))
	;; We just showed the children, now show everything.
	(show-subtree)
	(message "SUBTREE")
	(setq org-cycle-subtree-status 'subtree))
       (t
	;; Default action: hide the subtree.
	(hide-subtree)
	(message "FOLDED")
	(setq org-cycle-subtree-status 'folded)))))

   ;; TAB emulation
   (buffer-read-only (org-back-to-heading))
   ((if (and (eq org-cycle-emulate-tab 'white)
	     (save-excursion (beginning-of-line 1) (looking-at "[ \t]+$")))
	t
      (eq org-cycle-emulate-tab t))
    (if (and (looking-at "[ \n\r\t]")
             (string-match "^[ \t]*$" (buffer-substring
                                       (point-at-bol) (point))))
        (progn
          (beginning-of-line 1)
          (and (looking-at "[ \t]+") (replace-match ""))))
    (indent-relative))

   (t (save-excursion
        (org-back-to-heading)
        (org-cycle)))))

(defvar org-goto-window-configuration nil)
(defvar org-goto-marker nil)
(defvar org-goto-map (make-sparse-keymap))
(let ((cmds '(isearch-forward isearch-backward)) cmd)
  (while (setq cmd (pop cmds))
    (substitute-key-definition cmd cmd org-goto-map global-map)))
(define-key org-goto-map [(return)] 'org-goto-ret)
(define-key org-goto-map [(left)]   'org-goto-left)
(define-key org-goto-map [(right)]  'org-goto-right)
(define-key org-goto-map [(?q)]     'org-goto-quit)
(define-key org-goto-map [(control ?g)] 'org-goto-quit)
(define-key org-goto-map [(tab)] 'org-cycle)
(define-key org-goto-map [(down)] 'outline-next-visible-heading)
(define-key org-goto-map [(up)] 'outline-previous-visible-heading)
(define-key org-goto-map "n" 'outline-next-visible-heading)
(define-key org-goto-map "p" 'outline-previous-visible-heading)
(define-key org-goto-map "f" 'outline-forward-same-level)
(define-key org-goto-map "b" 'outline-backward-same-level)
(define-key org-goto-map "u" 'outline-up-heading)
(define-key org-goto-map "\C-c\C-n" 'outline-next-visible-heading)
(define-key org-goto-map "\C-c\C-p" 'outline-previous-visible-heading)
(define-key org-goto-map "\C-c\C-f" 'outline-forward-same-level)
(define-key org-goto-map "\C-c\C-b" 'outline-backward-same-level)
(define-key org-goto-map "\C-c\C-u" 'outline-up-heading)
(let ((l '(1 2 3 4 5 6 7 8 9 0)))
  (while l (define-key org-goto-map (int-to-string (pop l)) 'digit-argument)))

(defconst org-goto-help
"Select a location to jump to, press RET
\[Up]/[Down]=next/prev headline   TAB=cycle visibility   RET=select   [Q]uit")

(defun org-goto ()
  "Go to a different location of the document, keeping current visibility.

When you want to go to a different location in a document, the fastest way
is often to fold the entire buffer and then dive into the tree.  This
method has the disadvantage, than the previous location will be folded, and
that can be unwanted.

This command works around this by showing a copy of the current buffer in
overview mode.  You can dive into the tree in that copy, to find the
location you want to reach.  When pressing RET, the command returns to the
original buffer in which the visibility is still unchanged.  It then jumps
to the new location, making it and the headline hierarchy above it visible."
  (interactive)
  (let* ((org-goto-start-pos (point))
         (selected-point
          (org-get-location (current-buffer) org-goto-help)))
    (if selected-point
        (progn
          (goto-char selected-point)
          (if (org-invisible-p) (org-show-hierarchy-above)))
      (error "Quit"))))

(defun org-get-location (buf help)
  "Let the user select a location in the Org-mode buffer BUF.
This function uses a recursive edit.  It returns the selected position
or nil."
  (let (org-selected-point)
    (save-excursion
      (save-window-excursion
        (delete-other-windows)
        (switch-to-buffer (get-buffer-create "*org-goto*"))
        (with-output-to-temp-buffer "*Help*"
          (princ help))
        (shrink-window-if-larger-than-buffer (get-buffer-window "*Help*"))
        (setq buffer-read-only nil)
        (erase-buffer)
        (insert-buffer buf)
        (let ((org-startup-truncated t)
              (org-startup-folded t)
              (org-startup-with-deadline-check nil))
          (org-mode))
        (setq buffer-read-only t)
        (if (boundp 'org-goto-start-pos)
            (goto-char org-goto-start-pos)
          (goto-char (point-min)))
        (org-beginning-of-line)
        (message "Select location and press RET")
        ;; now we make sure that during selection, ony very few keys work
        ;; and that it is impossible to switch to another window.
        (let ((gm (current-global-map))
              (overriding-local-map org-goto-map))
          (unwind-protect
              (progn
                (use-global-map org-goto-map)
                (recursive-edit))
            (use-global-map gm)))))
    (kill-buffer "*org-goto*")
    org-selected-point))

;;  FIXME:  It may not be a good idea to temper with the prefix argument...
(defun org-goto-ret (&optional arg)
  "Finish org-goto by going to the new location."
  (interactive "P")
  (setq org-selected-point (point)
        current-prefix-arg arg)
  (throw 'exit nil))

(defun org-goto-left (&optional arg)
  "Finish org-goto by going to the new location."
  (interactive "P")
  (if (org-on-heading-p)
      (progn
        (beginning-of-line 1)
        (setq org-selected-point (point)
              current-prefix-arg (- (match-end 0) (match-beginning 0)))
        (throw 'exit nil))
    (error "Not on a heading")))

(defun org-goto-right (&optional arg)
  "Finish org-goto by going to the new location."
  (interactive "P")
  (if (org-on-heading-p)
      (progn
        (outline-end-of-subtree)
        (or (eobp) (forward-char 1))
        (setq org-selected-point (point)
              current-prefix-arg (- (match-end 0) (match-beginning 0)))
        (throw 'exit nil))
    (error "Not on a heading")))

(defun org-goto-quit ()
  "Finish org-goto without cursor motion."
  (interactive)
  (setq org-selected-point nil)
  (throw 'exit nil))

;;; Promotion, Demotion, Inserting new headlines

(defvar org-ignore-region nil
  "To temporary disable the active region.")

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(defun org-insert-heading (arg)
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  "Insert a new heading with same depth at point."
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  (interactive "P")
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  (let* ((head (save-excursion
		 (condition-case nil
		     (org-back-to-heading)
		   (error (outline-next-heading)))
		 (prog1 (match-string 0)
		   (funcall outline-level)))))
    (unless (bolp) (newline))
    (insert head)
    (unless (eolp)
      (save-excursion (newline-and-indent)))
    (unless (equal (char-before) ?\ )
      (insert " "))
    (run-hooks 'org-insert-heading-hook)))

(defun org-promote-subtree (&optional arg)
  "Promote the entire subtree.
See also `org-promote'."
  (interactive "P")
  (org-map-tree 'org-promote))

(defun org-demote-subtree (&optional arg)
  "Demote the entire subtree.  See `org-demote'.
See also `org-promote'."
  (interactive "P")
  (org-map-tree 'org-demote))

(defun org-do-promote (&optional arg)
  "Promote the current heading higher up the tree.
If the region is active in transient-mark-mode, promote all headings
in the region."
  (interactive "P")
  (save-excursion
    (if (org-region-active-p)
        (org-map-region 'org-promote (region-beginning) (region-end))
      (org-promote)))
  (org-fix-position-after-promote))

(defun org-do-demote (&optional arg)
  "Demote the current heading lower down the tree.
If the region is active in transient-mark-mode, demote all headings
in the region."
  (interactive "P")
  (save-excursion
    (if (org-region-active-p)
        (org-map-region 'org-demote (region-beginning) (region-end))
      (org-demote)))
  (org-fix-position-after-promote))

(defun org-fix-position-after-promote ()
  "Make sure that after pro/demotion cursor position is right."
  (and (equal (char-after) ?\ )
       (equal (char-before) ?*)
       (forward-char 1)))

(defun org-promote ()
  "Promote the current heading higher up the tree.
If the region is active in transient-mark-mode, promote all headings
in the region."
  (org-back-to-heading t)
  (let* ((level (save-match-data (funcall outline-level)))
         (up-head (make-string (1- level) ?*)))
    (if (= level 1) (error "Cannot promote to level 0. UNDO to recover."))
    (replace-match up-head nil t)
    (if org-adapt-indentation
        (org-fixup-indentation "^ " "" "^ ?\\S-"))))

(defun org-demote ()
  "Demote the current heading lower down the tree.
If the region is active in transient-mark-mode, demote all headings
in the region."
  (org-back-to-heading t)
  (let* ((level (save-match-data (funcall outline-level)))
         (down-head (make-string (1+ level) ?*)))
    (replace-match down-head nil t)
    (if org-adapt-indentation
        (org-fixup-indentation "^ " "  " "^\\S-"))))

(defun org-map-tree (fun)
  "Call FUN for every heading underneath the current one."
  (org-back-to-heading)
  (let ((level (outline-level)))
    (save-excursion
      (funcall fun)
      (while (and (progn
                    (outline-next-heading)
                    (> (funcall outline-level) level))
                  (not (eobp)))
        (funcall fun)))))

(defun org-map-region (fun beg end)
  "Call FUN for every heading between BEG and END."
  (let ((org-ignore-region t))
    (save-excursion
      (setq end (copy-marker end))
      (goto-char beg)
      ;;      (if (fboundp 'deactivate-mark) (deactivate-mark))
      ;;    (if (fboundp 'zmacs-deactivate-region) (zmacs-deactivate-region))
      (if (and (re-search-forward (concat "^" outline-regexp) nil t)
               (< (point) end))
          (funcall fun))
      (while (and (progn
                    (outline-next-heading)
                    (< (point) end))
                  (not (eobp)))
        (funcall fun)))))

(defun org-fixup-indentation (from to prohibit)
  "Change the indentation in the current entry by re-replacing FROM with TO.
However, if the regexp PROHIBIT matches at all, don't do anything.
This is being used to change indentation along with the length of the
heading marker.  But if there are any lines which are not indented, nothing
is changed at all."
  (save-excursion
    (let ((end (save-excursion (outline-next-heading)
                               (point-marker))))
      (unless (save-excursion (re-search-forward prohibit end t))
        (while (re-search-forward from end t)
          (replace-match to)
          (beginning-of-line 2)))
      (move-marker end nil))))

;;; Vertical tree motion, cutting and pasting of subtrees

(defun org-move-subtree-up (&optional arg)
  "Move the current subtree up past ARG headlines of the same level."
  (interactive "p")
  (org-move-subtree-down (- (prefix-numeric-value arg))))

(defun org-move-subtree-down (&optional arg)
  "Move the current subtree down past ARG headlines of the same level."
  (interactive "p")
  (setq arg (prefix-numeric-value arg))
  (let ((movfunc (if (> arg 0) 'outline-get-next-sibling
		   'outline-get-last-sibling))
	(ins-point (make-marker))
	(cnt (abs arg))
	beg end txt folded)
    ;; Select the tree
    (org-back-to-heading)
    (setq beg (point))
    (save-match-data
      (save-excursion (outline-end-of-heading)
		      (setq folded (org-invisible-p)))
      (outline-end-of-subtree))
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    (outline-next-heading)
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    (setq end (point))
    ;; Find insertion point, with error handling
    (goto-char beg)
    (while (> cnt 0)
      (or (and (funcall movfunc) (looking-at outline-regexp))
	  (progn (goto-char beg)
		 (error "Cannot move past superior level or buffer limit")))
      (setq cnt (1- cnt)))
    (if (> arg 0)
	;; Moving forward - still need to move over subtree
	(progn (outline-end-of-subtree)
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               (outline-next-heading)
               (if (not (or (looking-at (concat "^" outline-regexp))
                            (bolp)))
                   (newline))))
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    (move-marker ins-point (point))
    (setq txt (buffer-substring beg end))
    (delete-region beg end)
    (insert txt)
    (goto-char ins-point)
    (if folded (hide-subtree))
    (move-marker ins-point nil)))

(defvar org-subtree-clip ""
  "Clipboard for cut and paste of subtrees.
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