lisp/org-mobile.el

   1 ;;; org-mobile.el --- Code for asymmetric sync with a mobile device
   2 ;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
   3 ;;
   4 ;; Author: Carsten Dominik <carsten at orgmode dot org>
   5 ;; Keywords: outlines, hypermedia, calendar, wp
   6 ;; Homepage: http://orgmode.org
   7 ;;
   8 ;; This file is part of GNU Emacs.
   9 ;;
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14 ;;
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19 ;;
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22 ;;
  23 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  24 ;;
  25 ;;; Commentary:
  26 ;;
  27 ;; This file contains the code to interact with Richard Moreland's iPhone
  28 ;; application MobileOrg, as well as with the Android version by Matthew Jones.
  29 ;; This code is documented in Appendix B of the Org-mode manual.  The code is
  30 ;; not specific for the iPhone and Android - any external
  31 ;; viewer/flagging/editing application that uses the same conventions could
  32 ;; be used.
  33
  34 (require 'org)
  35 (require 'org-agenda)
  36 ;;; Code:
  37
  38 (eval-when-compile (require 'cl))
  39
  40 (declare-function org-pop-to-buffer-same-window
  41                   "org-compat" (&optional buffer-or-name norecord label))
  42
  43 (defgroup org-mobile nil
  44   "Options concerning support for a viewer/editor on a mobile device."
  45   :tag "Org Mobile"
  46   :group 'org)
  47
  48 (defcustom org-mobile-files '(org-agenda-files)
  49   "Files to be staged for MobileOrg.
  50 This is basically a list of files and directories.  Files will be staged
  51 directly.  Directories will be search for files with the extension `.org'.
  52 In addition to this, the list may also contain the following symbols:
  53
  54 org-agenda-files
  55      This means include the complete, unrestricted list of files given in
  56      the variable `org-agenda-files'.
  57 org-agenda-text-search-extra-files
  58      Include the files given in the variable
  59      `org-agenda-text-search-extra-files'"
  60   :group 'org-mobile
  61   :type '(list :greedy t
  62                (option (const :tag "org-agenda-files" org-agenda-files))
  63                (option (const :tag "org-agenda-text-search-extra-files"
  64                               org-agenda-text-search-extra-files))
  65                (repeat :inline t :tag "Additional files"
  66                        (file))))
  67
  68 (defcustom org-mobile-files-exclude-regexp ""
  69   "A regexp to exclude files from `org-mobile-files'."
  70   :group 'org-mobile
  71   :version "24.1"
  72   :type 'regexp)
  73
  74 (defcustom org-mobile-directory ""
  75   "The WebDAV directory where the interaction with the mobile takes place."
  76   :group 'org-mobile
  77   :type 'directory)
  78
  79 (defcustom org-mobile-allpriorities "A B C"
  80   "Default set of priority cookies for the index file."
  81   :version "24.4"
  82   :package-version '(Org . "8.0")
  83   :type 'string
  84   :group 'org-mobile)
  85
  86 (defcustom org-mobile-use-encryption nil
  87   "Non-nil means keep only encrypted files on the WebDAV server.
  88 Encryption uses AES-256, with a password given in
  89 `org-mobile-encryption-password'.
  90 When nil, plain files are kept on the server.
  91 Turning on encryption requires to set the same password in the MobileOrg
  92 application.  Before turning this on, check of MobileOrg does already
  93 support it - at the time of this writing it did not yet."
  94   :group 'org-mobile
  95   :version "24.1"
  96   :type 'boolean)
  97
  98 (defcustom org-mobile-encryption-tempfile "~/orgtmpcrypt"
  99   "File that is being used as a temporary file for encryption.
 100 This must be local file on your local machine (not on the WebDAV server).
 101 You might want to put this file into a directory where only you have access."
 102   :group 'org-mobile
 103   :version "24.1"
 104   :type 'directory)
 105
 106 (defcustom org-mobile-encryption-password ""
 107   "Password for encrypting files uploaded to the server.
 108 This is a single password which is used for AES-256 encryption.  The same
 109 password must also be set in the MobileOrg application.  All Org files,
 110 including mobileorg.org will be encrypted using this password.
 111
 112 SECURITY CONSIDERATIONS:
 113
 114 Note that, when Org runs the encryption commands, the password could
 115 be visible briefly on your system with the `ps' command.  So this method is
 116 only intended to keep the files secure on the server, not on your own machine.
 117
 118 Also, if you set this variable in an init file (.emacs or .emacs.d/init.el
 119 or custom.el...) and if that file is stored in a way so that other can read
 120 it, this also limits the security of this approach.  You can also leave
 121 this variable empty - Org will then ask for the password once per Emacs
 122 session."
 123   :group 'org-mobile
 124   :version "24.1"
 125   :type '(string :tag "Password"))
 126
 127 (defvar org-mobile-encryption-password-session nil)
 128
 129 (defun org-mobile-encryption-password ()
 130   (or (org-string-nw-p org-mobile-encryption-password)
 131       (org-string-nw-p org-mobile-encryption-password-session)
 132       (setq org-mobile-encryption-password-session
 133             (read-passwd "Password for MobileOrg: " t))))
 134
 135 (defcustom org-mobile-inbox-for-pull "~/org/from-mobile.org"
 136   "The file where captured notes and flags will be appended to.
 137 During the execution of `org-mobile-pull', the file
 138 `org-mobile-capture-file' will be emptied it's contents have
 139 been appended to the file given here.  This file should be in
 140 `org-directory', and not in the staging area or on the web server."
 141   :group 'org-mobile
 142   :type 'file)
 143
 144 (defconst org-mobile-capture-file "mobileorg.org"
 145   "The capture file where the mobile stores captured notes and flags.
 146 This should not be changed, because MobileOrg assumes this name.")
 147
 148 (defcustom org-mobile-index-file "index.org"
 149   "The index file with links to all Org files that should be loaded by MobileOrg.
 150 Relative to `org-mobile-directory'.  The Address field in the MobileOrg setup
 151 should point to this file."
 152   :group 'org-mobile
 153   :type 'file)
 154
 155 (defcustom org-mobile-agendas 'all
 156   "The agendas that should be pushed to MobileOrg.
 157 Allowed values:
 158
 159 default  the weekly agenda and the global TODO list
 160 custom   all custom agendas defined by the user
 161 all      the custom agendas and the default ones
 162 list     a list of selection key(s) as string."
 163   :group 'org-mobile
 164   :version "24.1"
 165   :type '(choice
 166           (const :tag "Default Agendas" default)
 167           (const :tag "Custom Agendas" custom)
 168           (const :tag "Default and Custom Agendas" all)
 169           (repeat :tag "Selected"
 170                   (string :tag "Selection Keys"))))
 171
 172 (defcustom org-mobile-force-id-on-agenda-items t
 173   "Non-nil means make all agenda items carry an ID."
 174   :group 'org-mobile
 175   :type 'boolean)
 176
 177 (defcustom org-mobile-force-mobile-change nil
 178   "Non-nil means force the change made on the mobile device.
 179 So even if there have been changes to the computer version of the entry,
 180 force the new value set on the mobile.
 181 When nil, mark the entry from the mobile with an error message.
 182 Instead of nil or t, this variable can also be a list of symbols, indicating
 183 the editing types for which the mobile version should always dominate."
 184   :group 'org-mobile
 185   :type '(choice
 186           (const :tag "Always" t)
 187           (const :tag "Never" nil)
 188           (set :greedy t :tag "Specify"
 189                (const todo)
 190                (const tags)
 191                (const priority)
 192                (const heading)
 193                (const body))))
 194
 195 (defcustom org-mobile-action-alist
 196   '(("edit" . (org-mobile-edit data old new)))
 197   "Alist with flags and actions for mobile sync.
 198 When flagging an entry, MobileOrg will create entries that look like
 199
 200   * F(action:data)  [[id:entry-id][entry title]]
 201
 202 This alist defines that the ACTION in the parentheses of F() should mean,
 203 i.e. what action should be taken.  The :data part in the parenthesis is
 204 optional.  If present, the string after the colon will be passed to the
 205 action form as the `data' variable.
 206 The car of each elements of the alist is an actions string.  The cdr is
 207 an Emacs Lisp form that will be evaluated with the cursor on the headline
 208 of that entry.
 209
 210 For now, it is not recommended to change this variable."
 211   :group 'org-mobile
 212   :type '(repeat
 213           (cons (string :tag "Action flag")
 214                 (sexp   :tag "Action form"))))
 215
 216 (defcustom org-mobile-checksum-binary (or (executable-find "shasum")
 217                                           (executable-find "sha1sum")
 218                                           (executable-find "md5sum")
 219                                           (executable-find "md5"))
 220   "Executable used for computing checksums of agenda files."
 221   :group 'org-mobile
 222   :type 'string)
 223
 224 (defvar org-mobile-pre-push-hook nil
 225   "Hook run before running `org-mobile-push'.
 226 This could be used to clean up `org-mobile-directory', for example to
 227 remove files that used to be included in the agenda but no longer are.
 228 The presence of such files would not really be a problem, but after time
 229 they may accumulate.")
 230
 231 (defvar org-mobile-post-push-hook nil
 232   "Hook run after running `org-mobile-push'.
 233 If Emacs does not have direct write access to the WebDAV directory used
 234 by the mobile device, this hook should be used to copy all files from the
 235 local staging directory `org-mobile-directory' to the WebDAV directory,
 236 for example using `rsync' or `scp'.")
 237
 238 (defvar org-mobile-pre-pull-hook nil
 239   "Hook run before executing `org-mobile-pull'.
 240 If Emacs does not have direct write access to the WebDAV directory used
 241 by the mobile device, this hook should be used to copy the capture file
 242 `mobileorg.org' from the WebDAV location to the local staging
 243 directory `org-mobile-directory'.")
 244
 245 (defvar org-mobile-post-pull-hook nil
 246   "Hook run after running `org-mobile-pull', only if new items were found.
 247 If Emacs does not have direct write access to the WebDAV directory used
 248 by the mobile device, this hook should be used to copy the emptied
 249 capture file `mobileorg.org' back to the WebDAV directory, for example
 250 using `rsync' or `scp'.")
 251
 252 (defvar org-mobile-last-flagged-files nil
 253   "List of files containing entries flagged in the latest pull.")
 254
 255 (defvar org-mobile-files-alist nil)
 256 (defvar org-mobile-checksum-files nil)
 257
 258 (defun org-mobile-prepare-file-lists ()
 259   (setq org-mobile-files-alist (org-mobile-files-alist))
 260   (setq org-mobile-checksum-files nil))
 261
 262 (defun org-mobile-files-alist ()
 263   "Expand the list in `org-mobile-files' to a list of existing files.
 264 Also exclude files matching `org-mobile-files-exclude-regexp'."
 265   (let* ((include-archives
 266           (and (member 'org-agenda-text-search-extra-files org-mobile-files)
 267                (member 'agenda-archives org-agenda-text-search-extra-files)
 268                t))
 269          (files
 270           (apply 'append
 271                  (mapcar
 272                   (lambda (f)
 273                     (cond
 274                      ((eq f 'org-agenda-files)
 275                       (org-agenda-files t include-archives))
 276                      ((eq f 'org-agenda-text-search-extra-files)
 277                       (delq 'agenda-archives
 278                             (copy-sequence
 279                              org-agenda-text-search-extra-files)))
 280                      ((and (stringp f) (file-directory-p f))
 281                       (directory-files f 'full "\\.org\\'"))
 282                      ((and (stringp f) (file-exists-p f))
 283                       (list f))
 284                      (t nil)))
 285                   org-mobile-files)))
 286          (files (delq
 287                  nil
 288                  (mapcar (lambda (f)
 289                            (unless (and (not (string= org-mobile-files-exclude-regexp ""))
 290                                         (string-match org-mobile-files-exclude-regexp f))
 291                              (identity f)))
 292                          files)))
 293          (orgdir-uname (file-name-as-directory (file-truename org-directory)))
 294          (orgdir-re (concat "\\`" (regexp-quote orgdir-uname)))
 295          uname seen rtn file link-name)
 296     ;; Make the files unique, and determine the name under which they will
 297     ;; be listed.
 298     (while (setq file (pop files))
 299       (if (not (file-name-absolute-p file))
 300           (setq file (expand-file-name file org-directory)))
 301       (setq uname (file-truename file))
 302       (unless (member uname seen)
 303         (push uname seen)
 304         (if (string-match orgdir-re uname)
 305             (setq link-name (substring uname (match-end 0)))
 306           (setq link-name (file-name-nondirectory uname)))
 307         (push (cons file link-name) rtn)))
 308     (nreverse rtn)))
 309
 310 ;;;###autoload
 311 (defun org-mobile-push ()
 312   "Push the current state of Org affairs to the target directory.
 313 This will create the index file, copy all agenda files there, and also
 314 create all custom agenda views, for upload to the mobile phone."
 315   (interactive)
 316   (let ((a-buffer (get-buffer org-agenda-buffer-name)))
 317     (let ((org-agenda-curbuf-name org-agenda-buffer-name)
 318           (org-agenda-buffer-name "*SUMO*")
 319           (org-agenda-tag-filter org-agenda-tag-filter)
 320           (org-agenda-redo-command org-agenda-redo-command))
 321       (save-excursion
 322         (save-window-excursion
 323           (run-hooks 'org-mobile-pre-push-hook)
 324           (org-mobile-check-setup)
 325           (org-mobile-prepare-file-lists)
 326           (message "Creating agendas...")
 327           (let ((inhibit-redisplay t)
 328                 (org-agenda-files (mapcar 'car org-mobile-files-alist)))
 329             (org-mobile-create-sumo-agenda))
 330           (message "Creating agendas...done")
 331           (org-save-all-org-buffers) ; to save any IDs created by this process
 332           (message "Copying files...")
 333           (org-mobile-copy-agenda-files)
 334           (message "Writing index file...")
 335           (org-mobile-create-index-file)
 336           (message "Writing checksums...")
 337           (org-mobile-write-checksums)
 338           (run-hooks 'org-mobile-post-push-hook)))
 339       (setq org-agenda-buffer-name org-agenda-curbuf-name
 340             org-agenda-this-buffer-name org-agenda-curbuf-name))
 341     (redraw-display)
 342     (when (buffer-live-p a-buffer)
 343       (if (not (get-buffer-window a-buffer))
 344           (kill-buffer a-buffer)
 345         (let ((cw (selected-window)))
 346           (select-window (get-buffer-window a-buffer))
 347           (org-agenda-redo)
 348           (select-window cw)))))
 349   (message "Files for mobile viewer staged"))
 350
 351 (defvar org-mobile-before-process-capture-hook nil
 352   "Hook that is run after content was moved to `org-mobile-inbox-for-pull'.
 353 The inbox file is visited by the current buffer, and the buffer is
 354 narrowed to the newly captured data.")
 355
 356 ;;;###autoload
 357 (defun org-mobile-pull ()
 358   "Pull the contents of `org-mobile-capture-file' and integrate them.
 359 Apply all flagged actions, flag entries to be flagged and then call an
 360 agenda view showing the flagged items."
 361   (interactive)
 362   (org-mobile-check-setup)
 363   (run-hooks 'org-mobile-pre-pull-hook)
 364   (let ((insertion-marker (org-mobile-move-capture)))
 365     (if (not (markerp insertion-marker))
 366         (message "No new items")
 367       (org-with-point-at insertion-marker
 368         (save-restriction
 369           (narrow-to-region (point) (point-max))
 370           (run-hooks 'org-mobile-before-process-capture-hook)))
 371       (org-with-point-at insertion-marker
 372         (org-mobile-apply (point) (point-max)))
 373       (move-marker insertion-marker nil)
 374       (run-hooks 'org-mobile-post-pull-hook)
 375       (when org-mobile-last-flagged-files
 376         ;; Make an agenda view of flagged entries, but only in the files
 377         ;; where stuff has been added.
 378         (put 'org-agenda-files 'org-restrict org-mobile-last-flagged-files)
 379         (let ((org-agenda-keep-restricted-file-list t))
 380           (org-agenda nil "?"))))))
 381
 382 (defun org-mobile-check-setup ()
 383   "Check if org-mobile-directory has been set up."
 384   (org-mobile-cleanup-encryption-tempfile)
 385   (unless (and org-directory
 386                (stringp org-directory)
 387                (string-match "\\S-" org-directory)
 388                (file-exists-p org-directory)
 389                (file-directory-p org-directory))
 390     (error
 391      "Please set `org-directory' to the directory where your org files live"))
 392   (unless (and org-mobile-directory
 393                (stringp org-mobile-directory)
 394                (string-match "\\S-" org-mobile-directory)
 395                (file-exists-p org-mobile-directory)
 396                (file-directory-p org-mobile-directory))
 397     (error
 398      "Variable `org-mobile-directory' must point to an existing directory"))
 399   (unless (and org-mobile-inbox-for-pull
 400                (stringp org-mobile-inbox-for-pull)
 401                (string-match "\\S-" org-mobile-inbox-for-pull)
 402                (file-exists-p
 403                 (file-name-directory org-mobile-inbox-for-pull)))
 404     (error
 405      "Variable `org-mobile-inbox-for-pull' must point to a file in an existing directory"))
 406   (unless (and org-mobile-checksum-binary
 407                (string-match "\\S-" org-mobile-checksum-binary))
 408     (error "No executable found to compute checksums"))
 409   (when org-mobile-use-encryption
 410     (unless (string-match "\\S-" (org-mobile-encryption-password))
 411       (error
 412        "To use encryption, you must set `org-mobile-encryption-password'"))
 413     (unless (file-writable-p org-mobile-encryption-tempfile)
 414       (error "Cannot write to encryption tempfile %s"
 415              org-mobile-encryption-tempfile))
 416     (unless (executable-find "openssl")
 417       (error "OpenSSL is needed to encrypt files"))))
 418
 419 (defun org-mobile-create-index-file ()
 420   "Write the index file in the WebDAV directory."
 421   (let ((files-alist (sort (copy-sequence org-mobile-files-alist)
 422                            (lambda (a b) (string< (cdr a) (cdr b)))))
 423         (def-todo (default-value 'org-todo-keywords))
 424         (def-tags (default-value 'org-tag-alist))
 425         (target-file (expand-file-name org-mobile-index-file
 426                                        org-mobile-directory))
 427         file link-name todo-kwds done-kwds tags drawers entry kwds dwds twds)
 428     (when (stringp (car def-todo))
 429       (setq def-todo (list (cons 'sequence def-todo))))
 430     (org-agenda-prepare-buffers (mapcar 'car files-alist))
 431     (setq done-kwds (org-uniquify org-done-keywords-for-agenda))
 432     (setq todo-kwds (org-delete-all
 433                      done-kwds
 434                      (org-uniquify org-todo-keywords-for-agenda)))
 435     (setq drawers (org-uniquify org-drawers-for-agenda))
 436     (setq tags (mapcar 'car (org-global-tags-completion-table
 437                              (mapcar 'car files-alist))))
 438     (with-temp-file
 439         (if org-mobile-use-encryption
 440             org-mobile-encryption-tempfile
 441           target-file)
 442       (while (setq entry (pop def-todo))
 443         (insert "#+READONLY\n")
 444         (setq kwds (mapcar (lambda (x) (if (string-match "(" x)
 445                                            (substring x 0 (match-beginning 0))
 446                                          x))
 447                            (cdr entry)))
 448         (insert "#+TODO: " (mapconcat 'identity kwds " ") "\n")
 449         (setq dwds (member "|" kwds)
 450               twds (org-delete-all dwds kwds)
 451               todo-kwds (org-delete-all twds todo-kwds)
 452               done-kwds (org-delete-all dwds done-kwds)))
 453       (when (or todo-kwds done-kwds)
 454         (insert "#+TODO: " (mapconcat 'identity todo-kwds " ") " | "
 455                 (mapconcat 'identity done-kwds " ") "\n"))
 456       (setq def-tags (mapcar
 457                       (lambda (x)
 458                         (cond ((null x) nil)
 459                               ((stringp x) x)
 460                               ((eq (car x) :startgroup) "{")
 461                               ((eq (car x) :endgroup) "}")
 462                               ((eq (car x) :newline) nil)
 463                               ((listp x) (car x))))
 464                       def-tags))
 465       (setq def-tags (delq nil def-tags))
 466       (setq tags (org-delete-all def-tags tags))
 467       (setq tags (sort tags (lambda (a b) (string< (downcase a) (downcase b)))))
 468       (setq tags (append def-tags tags nil))
 469       (insert "#+TAGS: " (mapconcat 'identity tags " ") "\n")
 470       (insert "#+DRAWERS: " (mapconcat 'identity drawers " ") "\n")
 471       (insert "#+ALLPRIORITIES: " org-mobile-allpriorities "\n")
 472       (when (file-exists-p (expand-file-name
 473                             org-mobile-directory "agendas.org"))
 474         (insert "* [[file:agendas.org][Agenda Views]]\n"))
 475       (while (setq entry (pop files-alist))
 476         (setq file (car entry)
 477               link-name (cdr entry))
 478         (insert (format "* [[file:%s][%s]]\n"
 479                         link-name link-name)))
 480       (push (cons org-mobile-index-file (md5 (buffer-string)))
 481             org-mobile-checksum-files))
 482     (when org-mobile-use-encryption
 483       (org-mobile-encrypt-and-move org-mobile-encryption-tempfile
 484                                    target-file)
 485       (org-mobile-cleanup-encryption-tempfile))))
 486
 487 (defun org-mobile-copy-agenda-files ()
 488   "Copy all agenda files to the stage or WebDAV directory."
 489   (let ((files-alist org-mobile-files-alist)
 490         file buf entry link-name target-path target-dir check)
 491     (while (setq entry (pop files-alist))
 492       (setq file (car entry) link-name (cdr entry))
 493       (when (file-exists-p file)
 494         (setq target-path (expand-file-name link-name org-mobile-directory)
 495               target-dir (file-name-directory target-path))
 496         (unless (file-directory-p target-dir)
 497           (make-directory target-dir 'parents))
 498         (if org-mobile-use-encryption
 499             (org-mobile-encrypt-and-move file target-path)
 500           (copy-file file target-path 'ok-if-exists))
 501         (setq check (shell-command-to-string
 502                      (concat org-mobile-checksum-binary " "
 503                              (shell-quote-argument (expand-file-name file)))))
 504         (when (string-match "[a-fA-F0-9]\\{30,40\\}" check)
 505           (push (cons link-name (match-string 0 check))
 506                 org-mobile-checksum-files))))
 507
 508     (setq file (expand-file-name org-mobile-capture-file
 509                                  org-mobile-directory))
 510     (save-excursion
 511       (setq buf (find-file file))
 512       (when (and (= (point-min) (point-max)))
 513         (insert "\n")
 514         (save-buffer)
 515         (when org-mobile-use-encryption
 516           (write-file org-mobile-encryption-tempfile)
 517           (org-mobile-encrypt-and-move org-mobile-encryption-tempfile file)))
 518       (push (cons org-mobile-capture-file (md5 (buffer-string)))
 519             org-mobile-checksum-files))
 520     (org-mobile-cleanup-encryption-tempfile)
 521     (kill-buffer buf)))
 522
 523 (defun org-mobile-write-checksums ()
 524   "Create checksums for all files in `org-mobile-directory'.
 525 The table of checksums is written to the file mobile-checksums."
 526   (let ((sumfile (expand-file-name "checksums.dat" org-mobile-directory))
 527         (files org-mobile-checksum-files)
 528         entry file sum)
 529     (with-temp-file sumfile
 530       (set-buffer-file-coding-system 'undecided-unix nil)
 531       (while (setq entry (pop files))
 532         (setq file (car entry) sum (cdr entry))
 533         (insert (format "%s  %s\n" sum file))))))
 534
 535 (defun org-mobile-sumo-agenda-command ()
 536   "Return an agenda custom command that comprises all custom commands."
 537   (let ((custom-list
 538          ;; normalize different versions
 539          (delq nil
 540                (mapcar
 541                 (lambda (x)
 542                   (cond ((stringp (cdr x)) nil)
 543                         ((stringp (nth 1 x)) x)
 544                         ((not (nth 1 x)) (cons (car x) (cons "" (cddr x))))
 545                         (t (cons (car x) (cons "" (cdr x))))))
 546                 org-agenda-custom-commands)))
 547         (default-list '(("a" "Agenda" agenda) ("t" "All TODO" alltodo)))
 548         thelist atitle new e key desc type match settings cmds gkey gdesc gsettings cnt)
 549     (cond
 550      ((eq org-mobile-agendas 'custom)
 551       (setq thelist custom-list))
 552      ((eq org-mobile-agendas 'default)
 553       (setq thelist default-list))
 554      ((eq org-mobile-agendas 'all)
 555       (setq thelist custom-list)
 556       (unless (assoc "t" thelist) (push '("t" "ALL TODO" alltodo) thelist))
 557       (unless (assoc "a" thelist) (push '("a" "Agenda" agenda) thelist)))
 558      ((listp org-mobile-agendas)
 559       (setq thelist (append custom-list default-list))
 560       (setq thelist (delq nil (mapcar (lambda (k) (assoc k thelist))
 561                                       org-mobile-agendas)))))
 562     (while (setq e (pop thelist))
 563       (cond
 564        ((stringp (cdr e))
 565         ;; this is a description entry - skip it
 566         )
 567        ((eq (nth 2 e) 'search)
 568         ;; Search view is interactive, skip
 569         )
 570        ((memq (nth 2 e) '(todo-tree tags-tree occur-tree))
 571         ;; These are trees, not really agenda commands
 572         )
 573        ((and (memq (nth 2 e) '(todo tags tags-todo))
 574              (or (null (nth 3 e))
 575                  (not (string-match "\\S-" (nth 3 e)))))
 576         ;; These would be interactive because the match string is empty
 577         )
 578        ((memq (nth 2 e) '(agenda alltodo todo tags tags-todo))
 579         ;; a normal command
 580         (setq key (car e) desc (nth 1 e) type (nth 2 e) match (nth 3 e)
 581               settings (nth 4 e))
 582         (setq settings
 583               (cons (list 'org-agenda-title-append
 584                           (concat "<after>KEYS=" key " TITLE: "
 585                                   (if (and (stringp desc) (> (length desc) 0))
 586                                       desc (symbol-name type))
 587                                   "</after>"))
 588                     settings))
 589         (push (list type match settings) new))
 590        ((or (functionp (nth 2 e)) (symbolp (nth 2 e)))
 591         ;; A user-defined function, which can do anything, so simply
 592         ;; ignore it.
 593         )
 594        (t
 595         ;; a block agenda
 596         (setq gkey (car e) gdesc (nth 1 e) gsettings (nth 3 e) cmds (nth 2 e))
 597         (setq cnt 0)
 598         (while (setq e (pop cmds))
 599           (setq type (car e) match (nth 1 e) settings (nth 2 e))
 600           (setq atitle (if (string= "" gdesc) match gdesc))
 601           (setq settings (append gsettings settings))
 602           (setq settings
 603                 (cons (list 'org-agenda-title-append
 604                             (concat "<after>KEYS=" gkey "#" (number-to-string
 605                                                              (setq cnt (1+ cnt)))
 606                                     " TITLE: " atitle "</after>"))
 607                       settings))
 608           (push (list type match settings) new)))))
 609     (and new (list "X" "SUMO" (reverse new)
 610                    '((org-agenda-compact-blocks nil))))))
 611
 612 (defvar org-mobile-creating-agendas nil)
 613 (defun org-mobile-write-agenda-for-mobile (file)
 614   (let ((all (buffer-string)) in-date id pl prefix line app short m sexp)
 615     (with-temp-file file
 616       (org-mode)
 617       (insert "#+READONLY\n")
 618       (insert all)
 619       (goto-char (point-min))
 620       (while (not (eobp))
 621         (cond
 622          ((looking-at "[ \t]*$")) ; keep empty lines
 623          ((looking-at "=+$")
 624           ;; remove underlining
 625           (delete-region (point) (point-at-eol)))
 626          ((get-text-property (point) 'org-agenda-structural-header)
 627           (setq in-date nil)
 628           (setq app (get-text-property (point) 'org-agenda-title-append))
 629           (setq short (get-text-property (point) 'short-heading))
 630           (when (and short (looking-at ".+"))
 631             (replace-match short nil t)
 632             (beginning-of-line 1))
 633           (when app
 634             (end-of-line 1)
 635             (insert app)
 636             (beginning-of-line 1))
 637           (insert "* "))
 638          ((get-text-property (point) 'org-agenda-date-header)
 639           (setq in-date t)
 640           (insert "** "))
 641          ((setq m (or (get-text-property (point) 'org-hd-marker)
 642                       (get-text-property (point) 'org-marker)))
 643           (setq sexp (member (get-text-property (point) 'type)
 644                              '("diary" "sexp")))
 645           (if (setq pl (text-property-any (point) (point-at-eol) 'org-heading t))
 646               (progn
 647                 (setq prefix (org-trim (buffer-substring
 648                                         (point) pl))
 649                       line (org-trim (buffer-substring
 650                                       pl
 651                                       (point-at-eol))))
 652                 (delete-region (point-at-bol) (point-at-eol))
 653                 (insert line "<before>" prefix "</before>")
 654                 (beginning-of-line 1))
 655             (and (looking-at "[ \t]+") (replace-match "")))
 656           (insert (if in-date "***  " "**  "))
 657           (end-of-line 1)
 658           (insert "\n")
 659           (unless sexp
 660             (insert (org-agenda-get-some-entry-text
 661                      m 10 "   " 'planning)
 662                     "\n")
 663             (when (setq id
 664                         (if (org-bound-and-true-p
 665                              org-mobile-force-id-on-agenda-items)
 666                             (org-id-get m 'create)
 667                           (or (org-entry-get m "ID")
 668                               (org-mobile-get-outline-path-link m))))
 669               (insert "   :PROPERTIES:\n   :ORIGINAL_ID: " id
 670                       "\n   :END:\n")))))
 671         (beginning-of-line 2))
 672       (push (cons "agendas.org" (md5 (buffer-string)))
 673             org-mobile-checksum-files))
 674     (message "Agenda written to Org file %s" file)))
 675
 676 (defun org-mobile-get-outline-path-link (pom)
 677   (org-with-point-at pom
 678     (concat "olp:"
 679             (org-mobile-escape-olp (file-name-nondirectory buffer-file-name))
 680             "/"
 681             (mapconcat 'org-mobile-escape-olp
 682                        (org-get-outline-path)
 683                        "/")
 684             "/"
 685             (org-mobile-escape-olp (nth 4 (org-heading-components))))))
 686
 687 (defun org-mobile-escape-olp (s)
 688   (let  ((table '(?: ?/)))
 689     (org-link-escape s table)))
 690
 691 (defun org-mobile-create-sumo-agenda ()
 692   "Create a file that contains all custom agenda views."
 693   (interactive)
 694   (let* ((file (expand-file-name "agendas.org"
 695                                  org-mobile-directory))
 696          (file1 (if org-mobile-use-encryption
 697                     org-mobile-encryption-tempfile
 698                   file))
 699          (sumo (org-mobile-sumo-agenda-command))
 700          (org-agenda-custom-commands
 701           (list (append sumo (list (list file1)))))
 702          (org-mobile-creating-agendas t))
 703     (unless (file-writable-p file1)
 704       (error "Cannot write to file %s" file1))
 705     (when sumo
 706       (org-store-agenda-views))
 707     (when org-mobile-use-encryption
 708       (org-mobile-encrypt-and-move file1 file)
 709       (delete-file file1)
 710       (org-mobile-cleanup-encryption-tempfile))))
 711
 712 (defun org-mobile-encrypt-and-move (infile outfile)
 713   "Encrypt INFILE locally to INFILE_enc, then move it to OUTFILE.
 714 We do this in two steps so that remote paths will work, even if the
 715 encryption program does not understand them."
 716   (let ((encfile (concat infile "_enc")))
 717     (org-mobile-encrypt-file infile encfile)
 718     (when outfile
 719       (copy-file encfile outfile 'ok-if-exists)
 720       (delete-file encfile))))
 721
 722 (defun org-mobile-encrypt-file (infile outfile)
 723   "Encrypt INFILE to OUTFILE, using `org-mobile-encryption-password'."
 724   (shell-command
 725    (format "openssl enc -aes-256-cbc -salt -pass %s -in %s -out %s"
 726            (shell-quote-argument (concat "pass:"
 727                                          (org-mobile-encryption-password)))
 728            (shell-quote-argument (expand-file-name infile))
 729            (shell-quote-argument (expand-file-name outfile)))))
 730
 731 (defun org-mobile-decrypt-file (infile outfile)
 732   "Decrypt INFILE to OUTFILE, using `org-mobile-encryption-password'."
 733   (shell-command
 734    (format "openssl enc -d -aes-256-cbc -salt -pass %s -in %s -out %s"
 735            (shell-quote-argument (concat "pass:"
 736                                          (org-mobile-encryption-password)))
 737            (shell-quote-argument (expand-file-name infile))
 738            (shell-quote-argument (expand-file-name outfile)))))
 739
 740 (defun org-mobile-cleanup-encryption-tempfile ()
 741   "Remove the encryption tempfile if it exists."
 742   (and (stringp org-mobile-encryption-tempfile)
 743        (file-exists-p org-mobile-encryption-tempfile)
 744        (delete-file org-mobile-encryption-tempfile)))
 745
 746 (defun org-mobile-move-capture ()
 747   "Move the contents of the capture file to the inbox file.
 748 Return a marker to the location where the new content has been added.
 749 If nothing new has been added, return nil."
 750   (interactive)
 751   (let* ((encfile nil)
 752          (capture-file (expand-file-name org-mobile-capture-file
 753                                          org-mobile-directory))
 754          (inbox-buffer (find-file-noselect org-mobile-inbox-for-pull))
 755          (capture-buffer
 756           (if (not org-mobile-use-encryption)
 757               (find-file-noselect capture-file)
 758             (org-mobile-cleanup-encryption-tempfile)
 759             (setq encfile (concat org-mobile-encryption-tempfile "_enc"))
 760             (copy-file capture-file encfile)
 761             (org-mobile-decrypt-file encfile org-mobile-encryption-tempfile)
 762             (find-file-noselect org-mobile-encryption-tempfile)))
 763          (insertion-point (make-marker))
 764          not-empty content)
 765     (with-current-buffer capture-buffer
 766       (setq content (buffer-string))
 767       (setq not-empty (string-match "\\S-" content))
 768       (when not-empty
 769         (set-buffer inbox-buffer)
 770         (widen)
 771         (goto-char (point-max))
 772         (or (bolp) (newline))
 773         (move-marker insertion-point
 774                      (prog1 (point) (insert content)))
 775         (save-buffer)
 776         (set-buffer capture-buffer)
 777         (erase-buffer)
 778         (save-buffer)
 779         (org-mobile-update-checksum-for-capture-file (buffer-string))))
 780     (kill-buffer capture-buffer)
 781     (when org-mobile-use-encryption
 782       (org-mobile-encrypt-and-move org-mobile-encryption-tempfile
 783                                    capture-file)
 784       (org-mobile-cleanup-encryption-tempfile))
 785     (if not-empty insertion-point)))
 786
 787 (defun org-mobile-update-checksum-for-capture-file (buffer-string)
 788   "Find the checksum line and modify it to match BUFFER-STRING."
 789   (let* ((file (expand-file-name "checksums.dat" org-mobile-directory))
 790          (buffer (find-file-noselect file)))
 791     (when buffer
 792       (with-current-buffer buffer
 793         (when (re-search-forward (concat "\\([0-9a-fA-F]\\{30,\\}\\).*?"
 794                                          (regexp-quote org-mobile-capture-file)
 795                                          "[ \t]*$") nil t)
 796           (goto-char (match-beginning 1))
 797           (delete-region (match-beginning 1) (match-end 1))
 798           (insert (md5 buffer-string))
 799           (save-buffer)))
 800       (kill-buffer buffer))))
 801
 802 (defun org-mobile-apply (&optional beg end)
 803   "Apply all change requests in the current buffer.
 804 If BEG and END are given, only do this in that region."
 805   (interactive)
 806   (require 'org-archive)
 807   (setq org-mobile-last-flagged-files nil)
 808   (setq beg (or beg (point-min)) end (or end (point-max)))
 809
 810   ;; Remove all Note IDs
 811   (goto-char beg)
 812   (while (re-search-forward "^\\*\\* Note ID: [-0-9A-F]+[ \t]*\n" end t)
 813     (replace-match ""))
 814
 815   ;; Find all the referenced entries, without making any changes yet
 816   (let ((marker (make-marker))
 817         (bos-marker (make-marker))
 818         (end (move-marker (make-marker) end))
 819         (cnt-new 0)
 820         (cnt-edit 0)
 821         (cnt-flag 0)
 822         (cnt-error 0)
 823         buf-list
 824         id-pos org-mobile-error)
 825
 826     ;; Count the new captures
 827     (goto-char beg)
 828     (while (re-search-forward "^\\* \\(.*\\)" end t)
 829       (and (>= (- (match-end 1) (match-beginning 1)) 2)
 830            (not (equal (downcase (substring (match-string 1) 0 2)) "f("))
 831            (incf cnt-new)))
 832
 833     ;; Find and apply the edits
 834     (goto-char beg)
 835     (while (re-search-forward
 836             "^\\*+[ \t]+F(\\([^():\n]*\\)\\(:\\([^()\n]*\\)\\)?)[ \t]+\\[\\[\\(\\(id\\|olp\\):\\([^]\n]+\\)\\)" end t)
 837       (catch 'next
 838         (let* ((action (match-string 1))
 839                (data (and (match-end 3) (match-string 3)))
 840                (id-pos (condition-case msg
 841                            (org-mobile-locate-entry (match-string 4))
 842                          (error (nth 1 msg))))
 843                (bos (point-at-bol))
 844                (eos (save-excursion (org-end-of-subtree t t)))
 845                (cmd (if (equal action "")
 846                         '(progn
 847                            (incf cnt-flag)
 848                            (org-toggle-tag "FLAGGED" 'on)
 849                            (and note
 850                                 (org-entry-put nil "THEFLAGGINGNOTE" note)))
 851                       (incf cnt-edit)
 852                       (cdr (assoc action org-mobile-action-alist))))
 853                (note (and (equal action "")
 854                           (buffer-substring (1+ (point-at-eol)) eos)))
 855                (org-inhibit-logging 'note) ;; Do not take notes interactively
 856                old new)
 857
 858           (goto-char bos)
 859           (when (and (markerp id-pos)
 860                      (not (member (marker-buffer id-pos) buf-list)))
 861             (org-mobile-timestamp-buffer (marker-buffer id-pos))
 862             (push (marker-buffer id-pos) buf-list))
 863           (unless (markerp id-pos)
 864             (goto-char (+ 2 (point-at-bol)))
 865             (if (stringp id-pos)
 866                 (insert id-pos " ")
 867               (insert "BAD REFERENCE "))
 868             (incf cnt-error)
 869             (throw 'next t))
 870           (unless cmd
 871             (insert "BAD FLAG ")
 872             (incf cnt-error)
 873             (throw 'next t))
 874           (move-marker bos-marker (point))
 875           (if (re-search-forward "^** Old value[ \t]*$" eos t)
 876               (setq old (buffer-substring
 877                          (1+ (match-end 0))
 878                          (progn (outline-next-heading) (point)))))
 879           (if (re-search-forward "^** New value[ \t]*$" eos t)
 880               (setq new (buffer-substring
 881                          (1+ (match-end 0))
 882                          (progn (outline-next-heading)
 883                                 (if (eobp) (org-back-over-empty-lines))
 884                                 (point)))))
 885           (setq old (and old (if (string-match "\\S-" old) old nil)))
 886           (setq new (and new (if (string-match "\\S-" new) new nil)))
 887           (if (and note (> (length note) 0))
 888               ;; Make Note into a single line, to fit into a property
 889               (setq note (mapconcat 'identity
 890                                     (org-split-string (org-trim note) "\n")
 891                                     "\\n")))
 892           (unless (equal data "body")
 893             (setq new (and new (org-trim new))
 894                   old (and old (org-trim old))))
 895           (goto-char (+ 2 bos-marker))
 896           ;; Remember this place so that we can return
 897           (move-marker marker (point))
 898           (setq org-mobile-error nil)
 899           (save-excursion
 900             (condition-case msg
 901                 (org-with-point-at id-pos
 902                   (progn
 903                     (eval cmd)
 904                     (unless (member data (list "delete" "archive" "archive-sibling" "addheading"))
 905                       (if (member "FLAGGED" (org-get-tags))
 906                           (add-to-list 'org-mobile-last-flagged-files
 907                                        (buffer-file-name (current-buffer)))))))
 908               (error (setq org-mobile-error msg))))
 909           (when org-mobile-error
 910             (org-pop-to-buffer-same-window (marker-buffer marker))
 911             (goto-char marker)
 912             (incf cnt-error)
 913             (insert (if (stringp (nth 1 org-mobile-error))
 914                         (nth 1 org-mobile-error)
 915                       "EXECUTION FAILED")
 916                     " ")
 917             (throw 'next t))
 918           ;; If we get here, the action has been applied successfully
 919           ;; So remove the entry
 920           (goto-char bos-marker)
 921           (delete-region (point) (org-end-of-subtree t t)))))
 922     (save-buffer)
 923     (move-marker marker nil)
 924     (move-marker end nil)
 925     (message "%d new, %d edits, %d flags, %d errors" cnt-new
 926              cnt-edit cnt-flag cnt-error)
 927     (sit-for 1)))
 928
 929 (defun org-mobile-timestamp-buffer (buf)
 930   "Time stamp buffer BUF, just to make sure its checksum will change."
 931   (with-current-buffer buf
 932     (save-excursion
 933       (save-restriction
 934         (widen)
 935         (goto-char (point-min))
 936         (if (re-search-forward
 937              "^\\([ \t]*\\)#\\+LAST_MOBILE_CHANGE:.*\n?" nil t)
 938             (progn
 939               (goto-char (match-end 1))
 940               (delete-region (point) (match-end 0)))
 941           (if (looking-at ".*?-\\*-.*-\\*-")
 942               (forward-line 1)))
 943         (insert "#+LAST_MOBILE_CHANGE: "
 944                 (format-time-string "%Y-%m-%d %T") "\n")))))
 945
 946 (defun org-mobile-smart-read ()
 947   "Parse the entry at point for shortcuts and expand them.
 948 These shortcuts are meant for fast and easy typing on the limited
 949 keyboards of a mobile device.  Below we show a list of the shortcuts
 950 currently implemented.
 951
 952 The entry is expected to contain an inactive time stamp indicating when
 953 the entry was created.  When setting dates and
 954 times (for example for deadlines), the time strings are interpreted
 955 relative to that creation date.
 956 Abbreviations are expected to take up entire lines, just because it is so
 957 easy to type RET on a mobile device.  Abbreviations start with one or two
 958 letters, followed immediately by a dot and then additional information.
 959 Generally the entire shortcut line is removed after action have been taken.
 960 Time stamps will be constructed using `org-read-date'.  So for example a
 961 line \"dd. 2tue\" will set a deadline on the second Tuesday after the
 962 creation date.
 963
 964 Here are the shortcuts currently implemented:
 965
 966 dd. string             set deadline
 967 ss. string             set scheduling
 968 tt. string             set time tamp, here.
 969 ti. string             set inactive time
 970
 971 tg. tag1 tag2 tag3     set all these tags, change case where necessary
 972 td. kwd                set this todo keyword, change case where necessary
 973
 974 FIXME: Hmmm, not sure if we can make his work against the
 975 auto-correction feature.  Needs a bit more thinking.  So this function
 976 is currently a noop.")
 977
 978 (defun org-mobile-locate-entry (link)
 979   (if (string-match "\\`id:\\(.*\\)$" link)
 980       (org-id-find (match-string 1 link) 'marker)
 981     (if (not (string-match "\\`olp:\\(.*?\\):\\(.*\\)$" link))
 982                                         ; not found with path, but maybe it is to be inserted
 983                                         ; in top level of the file?
 984         (if (not (string-match "\\`olp:\\(.*?\\)$" link))
 985             nil
 986           (let ((file (match-string 1 link)))
 987             (setq file (org-link-unescape file))
 988             (setq file (expand-file-name file org-directory))
 989             (save-excursion
 990               (find-file file)
 991               (goto-char (point-max))
 992               (newline)
 993               (goto-char (point-max))
 994               (point-marker))))
 995       (let ((file (match-string 1 link))
 996             (path (match-string 2 link)))
 997         (setq file (org-link-unescape file))
 998         (setq file (expand-file-name file org-directory))
 999         (setq path (mapcar 'org-link-unescape
1000                            (org-split-string path "/")))
1001         (org-find-olp (cons file path))))))
1002
1003 (defun org-mobile-edit (what old new)
1004   "Edit item WHAT in the current entry by replacing OLD with NEW.
1005 WHAT can be \"heading\", \"todo\", \"tags\", \"priority\", or \"body\".
1006 The edit only takes place if the current value is equal (except for
1007 white space) the OLD.  If this is so, OLD will be replace by NEW
1008 and the command will return t.  If something goes wrong, a string will
1009 be returned that indicates what went wrong."
1010   (let (current old1 new1 level)
1011     (if (stringp what) (setq what (intern what)))
1012
1013     (cond
1014
1015      ((memq what '(todo todostate))
1016       (setq current (org-get-todo-state))
1017       (cond
1018        ((equal new "DONEARCHIVE")
1019         (org-todo 'done)
1020         (org-archive-subtree-default))
1021        ((equal new current) t) ; nothing needs to be done
1022        ((or (equal current old)
1023             (eq org-mobile-force-mobile-change t)
1024             (memq 'todo org-mobile-force-mobile-change))
1025         (org-todo (or new 'none)) t)
1026        (t (error "State before change was expected as \"%s\", but is \"%s\""
1027                  old current))))
1028
1029      ((eq what 'tags)
1030       (setq current (org-get-tags)
1031             new1 (and new (org-split-string new ":+"))
1032             old1 (and old (org-split-string old ":+")))
1033       (cond
1034        ((org-mobile-tags-same-p current new1) t) ; no change needed
1035        ((or (org-mobile-tags-same-p current old1)
1036             (eq org-mobile-force-mobile-change t)
1037             (memq 'tags org-mobile-force-mobile-change))
1038         (org-set-tags-to new1) t)
1039        (t (error "Tags before change were expected as \"%s\", but are \"%s\""
1040                  (or old "") (or current "")))))
1041
1042      ((eq what 'priority)
1043       (when (looking-at org-complex-heading-regexp)
1044         (setq current (and (match-end 3) (substring (match-string 3) 2 3)))
1045         (cond
1046          ((equal current new) t) ; no action required
1047          ((or (equal current old)
1048               (eq org-mobile-force-mobile-change t)
1049               (memq 'tags org-mobile-force-mobile-change))
1050           (org-priority (and new (string-to-char new))))
1051          (t (error "Priority was expected to be %s, but is %s"
1052                    old current)))))
1053
1054      ((eq what 'heading)
1055       (when (looking-at org-complex-heading-regexp)
1056         (setq current (match-string 4))
1057         (cond
1058          ((equal current new) t) ; no action required
1059          ((or (equal current old)
1060               (eq org-mobile-force-mobile-change t)
1061               (memq 'heading org-mobile-force-mobile-change))
1062           (goto-char (match-beginning 4))
1063           (insert new)
1064           (delete-region (point) (+ (point) (length current)))
1065           (org-set-tags nil 'align))
1066          (t (error "Heading changed in MobileOrg and on the computer")))))
1067
1068      ((eq what 'addheading)
1069       (if (org-at-heading-p) ; if false we are in top-level of file
1070           (progn
1071             ;; Workaround a `org-insert-heading-respect-content' bug
1072             ;; which prevents correct insertion when point is invisible
1073             (org-show-subtree)
1074             (end-of-line 1)
1075             (org-insert-heading-respect-content '(16) t)
1076             (org-demote))
1077         (beginning-of-line)
1078         (insert "* "))
1079       (insert new))
1080
1081      ((eq what 'refile)
1082       (org-copy-subtree)
1083       (org-with-point-at (org-mobile-locate-entry new)
1084         (if (org-at-heading-p) ; if false we are in top-level of file
1085             (progn
1086               (setq level (org-get-valid-level (funcall outline-level) 1))
1087               (org-end-of-subtree t t)
1088               (org-paste-subtree level))
1089           (org-paste-subtree 1)))
1090       (org-cut-subtree))
1091
1092      ((eq what 'delete)
1093       (org-cut-subtree))
1094
1095      ((eq what 'archive)
1096       (org-archive-subtree))
1097
1098      ((eq what 'archive-sibling)
1099       (org-archive-to-archive-sibling))
1100
1101      ((eq what 'body)
1102       (setq current (buffer-substring (min (1+ (point-at-eol)) (point-max))
1103                                       (save-excursion (outline-next-heading)
1104                                                       (point))))
1105       (if (not (string-match "\\S-" current)) (setq current nil))
1106       (cond
1107        ((org-mobile-bodies-same-p current new) t) ; no action necessary
1108        ((or (org-mobile-bodies-same-p current old)
1109             (eq org-mobile-force-mobile-change t)
1110             (memq 'body org-mobile-force-mobile-change))
1111         (save-excursion
1112           (end-of-line 1)
1113           (insert "\n" new)
1114           (or (bolp) (insert "\n"))
1115           (delete-region (point) (progn (org-back-to-heading t)
1116                                         (outline-next-heading)
1117                                         (point))))
1118         t)
1119        (t (error "Body was changed in MobileOrg and on the computer")))))))
1120
1121 (defun org-mobile-tags-same-p (list1 list2)
1122   "Are the two tag lists the same?"
1123   (not (or (org-delete-all list1 list2)
1124            (org-delete-all list2 list1))))
1125
1126 (defun org-mobile-bodies-same-p (a b)
1127   "Compare if A and B are visually equal strings.
1128 We first remove leading and trailing white space from the entire strings.
1129 Then we split the strings into lines and remove leading/trailing whitespace
1130 from each line.  Then we compare.
1131 A and B must be strings or nil."
1132   (cond
1133    ((and (not a) (not b)) t)
1134    ((or (not a) (not b)) nil)
1135    (t (setq a (org-trim a) b (org-trim b))
1136       (setq a (mapconcat 'identity (org-split-string a "[ \t]*\n[ \t]*") "\n"))
1137       (setq b (mapconcat 'identity (org-split-string b "[ \t]*\n[ \t]*") "\n"))
1138       (equal a b))))
1139
1140 (provide 'org-mobile)
1141
1142 ;; Local variables:
1143 ;; generated-autoload-file: "org-loaddefs.el"
1144 ;; End:
1145
1146 ;;; org-mobile.el ends here