lisp/org-compat.el

   1 ;;; org-compat.el --- Compatibility Code for Older Emacsen -*- lexical-binding: t; -*-
   2
   3 ;; Copyright (C) 2004-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Carsten Dominik <carsten at orgmode dot org>
   6 ;; Keywords: outlines, hypermedia, calendar, wp
   7 ;; Homepage: http://orgmode.org
   8 ;;
   9 ;; This file is part of GNU Emacs.
  10 ;;
  11 ;; GNU Emacs is free software: you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation, either version 3 of the License, or
  14 ;; (at your option) any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  23 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
  24 ;;
  25 ;;; Commentary:
  26
  27 ;; This file contains code needed for compatibility with older
  28 ;; versions of GNU Emacs.
  29
  30 ;;; Code:
  31
  32 (require 'cl-lib)
  33 (require 'org-macs)
  34
  35 (declare-function org-at-table.el-p "org" (&optional table-type))
  36 (declare-function org-element-at-point "org-element" ())
  37 (declare-function org-element-type "org-element" (element))
  38 (declare-function org-link-set-parameters "org" (type &rest rest))
  39 (declare-function org-table-end (&optional table-type))
  40 (declare-function table--at-cell-p "table" (position &optional object at-column))
  41
  42 (defvar org-table-any-border-regexp)
  43 (defvar org-table-dataline-regexp)
  44 (defvar org-table-tab-recognizes-table.el)
  45 (defvar org-table1-hline-regexp)
  46
  47 ;; As of Emacs 25.1, `outline-mode' functions are under the 'outline-'
  48 ;; prefix, `find-tag' is replaced with `xref-find-definition' and
  49 ;; `x-get-selection' with `gui-get-selection'.
  50 (when (< emacs-major-version 25)
  51   (defalias 'outline-hide-entry 'hide-entry)
  52   (defalias 'outline-hide-sublevels 'hide-sublevels)
  53   (defalias 'outline-hide-subtree 'hide-subtree)
  54   (defalias 'outline-show-all 'show-all)
  55   (defalias 'outline-show-branches 'show-branches)
  56   (defalias 'outline-show-children 'show-children)
  57   (defalias 'outline-show-entry 'show-entry)
  58   (defalias 'outline-show-subtree 'show-subtree)
  59   (defalias 'xref-find-definitions 'find-tag)
  60   (defalias 'format-message 'format)
  61   (defalias 'gui-get-selection 'x-get-selection))
  62
  63 \f
  64 ;;; Obsolete aliases (remove them after the next major release).
  65
  66 ;;;; XEmacs compatibility, now removed.
  67 (define-obsolete-function-alias 'org-activate-mark 'activate-mark)
  68 (define-obsolete-function-alias 'org-add-hook 'add-hook "Org 9.0")
  69 (define-obsolete-function-alias 'org-bound-and-true-p 'bound-and-true-p "Org 9.0")
  70 (define-obsolete-function-alias 'org-decompose-region 'decompose-region "Org 9.0")
  71 (define-obsolete-function-alias 'org-defvaralias 'defvaralias "Org 9.0")
  72 (define-obsolete-function-alias 'org-detach-overlay 'delete-overlay "Org 9.0")
  73 (define-obsolete-function-alias 'org-file-equal-p 'file-equal-p "Org 9.0")
  74 (define-obsolete-function-alias 'org-float-time 'float-time "Org 9.0")
  75 (define-obsolete-function-alias 'org-indent-line-to 'indent-line-to "Org 9.0")
  76 (define-obsolete-function-alias 'org-indent-to-column 'indent-to-column "Org 9.0")
  77 (define-obsolete-function-alias 'org-looking-at-p 'looking-at-p "Org 9.0")
  78 (define-obsolete-function-alias 'org-looking-back 'looking-back "Org 9.0")
  79 (define-obsolete-function-alias 'org-match-string-no-properties 'match-string-no-properties "Org 9.0")
  80 (define-obsolete-function-alias 'org-propertize 'propertize "Org 9.0")
  81 (define-obsolete-function-alias 'org-select-frame-set-input-focus 'select-frame-set-input-focus "Org 9.0")
  82
  83 (defmacro org-re (s)
  84   "Replace posix classes in regular expression S."
  85   (declare (debug (form))
  86            (obsolete "you can safely remove it." "Org 9.0"))
  87   s)
  88
  89 ;;;; Functions from cl-lib that Org used to have its own implementation of.
  90 (define-obsolete-function-alias 'org-count 'cl-count "Org 9.0")
  91 (define-obsolete-function-alias 'org-every 'cl-every "Org 9.0")
  92 (define-obsolete-function-alias 'org-find-if 'cl-find-if "Org 9.0")
  93 (define-obsolete-function-alias 'org-reduce 'cl-reduce "Org 9.0")
  94 (define-obsolete-function-alias 'org-remove-if 'cl-remove-if "Org 9.0")
  95 (define-obsolete-function-alias 'org-remove-if-not 'cl-remove-if-not "Org 9.0")
  96 (define-obsolete-function-alias 'org-some 'cl-some "Org 9.0")
  97 (define-obsolete-function-alias 'org-floor* 'cl-floor "Org 9.0")
  98
  99 (defun org-sublist (list start end)
 100   "Return a section of LIST, from START to END.
 101 Counting starts at 1."
 102   (cl-subseq list (1- start) end))
 103 (make-obsolete 'org-sublist
 104                "use cl-subseq (note the 0-based counting)."
 105                "Org 9.0")
 106
 107
 108 ;;;; Functions available since Emacs 24.3
 109 (define-obsolete-function-alias 'org-buffer-narrowed-p 'buffer-narrowed-p "Org 9.0")
 110 (define-obsolete-function-alias 'org-called-interactively-p 'called-interactively-p "Org 9.0")
 111 (define-obsolete-function-alias 'org-char-to-string 'char-to-string "Org 9.0")
 112 (define-obsolete-function-alias 'org-delete-directory 'delete-directory "Org 9.0")
 113 (define-obsolete-function-alias 'org-format-seconds 'format-seconds "Org 9.0")
 114 (define-obsolete-function-alias 'org-link-escape-browser 'url-encode-url "Org 9.0")
 115 (define-obsolete-function-alias 'org-no-warnings 'with-no-warnings "Org 9.0")
 116 (define-obsolete-function-alias 'org-number-sequence 'number-sequence "Org 9.0")
 117 (define-obsolete-function-alias 'org-pop-to-buffer-same-window 'pop-to-buffer-same-window "Org 9.0")
 118 (define-obsolete-function-alias 'org-string-match-p 'string-match-p "Org 9.0")
 119
 120 ;;;; Functions and variables from previous releases now obsolete.
 121 (define-obsolete-function-alias 'org-element-remove-indentation
 122   'org-remove-indentation "Org 9.0")
 123 (define-obsolete-variable-alias 'org-hierarchical-checkbox-statistics
 124   'org-checkbox-hierarchical-statistics "Org 8.0")
 125 (define-obsolete-variable-alias 'org-description-max-indent
 126   'org-list-description-max-indent "Org 8.0")
 127 (define-obsolete-variable-alias 'org-latex-create-formula-image-program
 128   'org-preview-latex-default-process "Org 9.0")
 129 (define-obsolete-variable-alias 'org-latex-preview-ltxpng-directory
 130  'org-preview-latex-image-directory "Org 9.0")
 131 (define-obsolete-function-alias 'org-table-p 'org-at-table-p "Org 9.0")
 132 (define-obsolete-function-alias 'org-on-heading-p 'org-at-heading-p "Org 9.0")
 133 (define-obsolete-function-alias 'org-at-regexp-p 'org-in-regexp "Org 8.3")
 134 (define-obsolete-function-alias 'org-speed-command-default-hook
 135   'org-speed-command-activate "Org 8.0")
 136 (define-obsolete-function-alias 'org-babel-speed-command-hook
 137   'org-babel-speed-command-activate "Org 8.0")
 138 (define-obsolete-function-alias 'org-image-file-name-regexp
 139   'image-file-name-regexp "Org 9.0")
 140 (define-obsolete-function-alias 'org-get-legal-level
 141   'org-get-valid-level "Org 7.8")
 142 (define-obsolete-function-alias 'org-completing-read-no-i
 143   'completing-read "Org 9.0")
 144 (define-obsolete-function-alias 'org-icompleting-read
 145   'completing-read "Org 9.0")
 146 (define-obsolete-function-alias 'org-iread-file-name 'read-file-name "Org 9.0")
 147 (define-obsolete-function-alias 'org-days-to-time
 148   'org-time-stamp-to-now "Org 8.2")
 149 (define-obsolete-variable-alias 'org-agenda-ignore-drawer-properties
 150   'org-agenda-ignore-properties "Org 9.0")
 151 (define-obsolete-function-alias 'org-preview-latex-fragment
 152   'org-toggle-latex-fragment "Org 8.3")
 153 (define-obsolete-function-alias 'org-display-inline-modification-hook
 154   'org-display-inline-remove-overlay "Org 8.0")
 155 (define-obsolete-function-alias 'org-export-get-genealogy
 156   'org-element-lineage "Org 9.0")
 157 (define-obsolete-variable-alias 'org-latex-with-hyperref
 158   'org-latex-hyperref-template "Org 9.0")
 159 (define-obsolete-variable-alias 'org-link-to-org-use-id
 160   'org-id-link-to-org-use-id "Org 8.0")
 161 (define-obsolete-variable-alias 'hfy-optimisations 'hfy-optimizations "Org 9.0")
 162 (define-obsolete-variable-alias 'org-clock-modeline-total
 163   'org-clock-mode-line-total "Org 8.0")
 164 (define-obsolete-function-alias 'org-protocol-unhex-compound
 165   'org-link-unescape-compound "Org 7.8")
 166 (define-obsolete-function-alias 'org-protocol-unhex-string
 167   'org-link-unescape "Org 7.8")
 168 (define-obsolete-function-alias 'org-protocol-unhex-single-byte-sequence
 169   'org-link-unescape-single-byte-sequence "Org 7.8")
 170 (define-obsolete-variable-alias 'org-export-htmlized-org-css-url
 171   'org-org-htmlized-css-url "Org 8.2")
 172 (define-obsolete-variable-alias 'org-alphabetical-lists
 173   'org-list-allow-alphabetical "Org 8.0")
 174 (define-obsolete-function-alias 'org-list-parse-list 'org-list-to-lisp "Org 9.0")
 175 (define-obsolete-variable-alias 'org-agenda-menu-two-column
 176   'org-agenda-menu-two-columns "Org 8.0")
 177 (define-obsolete-variable-alias 'org-finalize-agenda-hook
 178   'org-agenda-finalize-hook "Org 8.0")
 179 (make-obsolete-variable 'org-agenda-ndays 'org-agenda-span "Org 7.8")
 180 (define-obsolete-function-alias 'org-agenda-post-command-hook
 181   'org-agenda-update-agenda-type "Org 8.0")
 182 (define-obsolete-function-alias 'org-agenda-todayp
 183   'org-agenda-today-p "Org 9.0")
 184 (define-obsolete-function-alias 'org-babel-examplize-region
 185   'org-babel-examplify-region "Org 9.0")
 186 (define-obsolete-function-alias 'org-babel-trim 'org-trim "Org 9.0")
 187 (define-obsolete-variable-alias 'org-html-style-include-scripts
 188   'org-html-head-include-scripts "Org 8.0")
 189 (define-obsolete-variable-alias 'org-html-style-include-default
 190   'org-html-head-include-default-style "Org 8.0")
 191 (define-obsolete-variable-alias 'org-html-style 'org-html-head "24.4")
 192 (define-obsolete-function-alias 'org-insert-columns-dblock
 193   'org-columns-insert-dblock "Org 9.0")
 194 (define-obsolete-function-alias 'org-activate-bracket-links
 195   'org-activate-links "Org 9.0")
 196 (define-obsolete-function-alias 'org-activate-plain-links 'ignore "Org 9.0")
 197 (define-obsolete-function-alias 'org-activate-angle-links 'ignore "Org 9.0")
 198
 199 (defun org-in-fixed-width-region-p ()
 200   "Non-nil if point in a fixed-width region."
 201   (save-match-data
 202     (eq 'fixed-width (org-element-type (org-element-at-point)))))
 203 (make-obsolete 'org-in-fixed-width-region-p
 204                "use `org-element' library"
 205                "Org 9.0")
 206
 207 (defcustom org-read-date-minibuffer-setup-hook nil
 208   "Hook to be used to set up keys for the date/time interface.
 209 Add key definitions to `minibuffer-local-map', which will be a
 210 temporary copy."
 211   :group 'org-time
 212   :type 'hook)
 213 (make-obsolete-variable
 214  'org-read-date-minibuffer-setup-hook
 215  "set `org-read-date-minibuffer-local-map' instead." "Org 8.0")
 216
 217 (defun org-compatible-face (inherits specs)
 218   "Make a compatible face specification.
 219 If INHERITS is an existing face and if the Emacs version supports
 220 it, just inherit the face.  If INHERITS is not given and SPECS
 221 is, use SPECS to define the face."
 222   (declare (indent 1))
 223   (if (facep inherits)
 224       (list (list t :inherit inherits))
 225     specs))
 226 (make-obsolete 'org-compatible-face "you can remove it." "Org 9.0")
 227
 228 (defun org-add-link-type (type &optional follow export)
 229   "Add a new TYPE link.
 230 FOLLOW and EXPORT are two functions.
 231
 232 FOLLOW should take the link path as the single argument and do whatever
 233 is necessary to follow the link, for example find a file or display
 234 a mail message.
 235
 236 EXPORT should format the link path for export to one of the export formats.
 237 It should be a function accepting three arguments:
 238
 239   path    the path of the link, the text after the prefix (like \"http:\")
 240   desc    the description of the link, if any
 241   format  the export format, a symbol like `html' or `latex' or `ascii'.
 242
 243 The function may use the FORMAT information to return different values
 244 depending on the format.  The return value will be put literally into
 245 the exported file.  If the return value is nil, this means Org should
 246 do what it normally does with links which do not have EXPORT defined.
 247
 248 Org mode has a built-in default for exporting links.  If you are happy with
 249 this default, there is no need to define an export function for the link
 250 type.  For a simple example of an export function, see `org-bbdb.el'.
 251
 252 If TYPE already exists, update it with the arguments.
 253 See `org-link-parameters' for documentation on the other parameters."
 254   (org-link-set-parameters type :follow follow :export export)
 255   (message "Created %s link." type))
 256
 257 (make-obsolete 'org-add-link-type "use `org-link-set-parameters' instead." "Org 9.0")
 258
 259 (defun org-table-recognize-table.el ()
 260   "If there is a table.el table nearby, recognize it and move into it."
 261   (when (and org-table-tab-recognizes-table.el (org-at-table.el-p))
 262     (beginning-of-line)
 263     (unless (or (looking-at org-table-dataline-regexp)
 264                 (not (looking-at org-table1-hline-regexp)))
 265       (forward-line)
 266       (when (looking-at org-table-any-border-regexp)
 267         (forward-line -2)))
 268     (if (re-search-forward "|" (org-table-end t) t)
 269         (progn
 270           (require 'table)
 271           (if (table--at-cell-p (point)) t
 272             (message "recognizing table.el table...")
 273             (table-recognize-table)
 274             (message "recognizing table.el table...done")))
 275       (error "This should not happen"))))
 276
 277 ;; Not used by Org core since commit 6d1e3082, Feb 2010.
 278 (make-obsolete 'org-table-recognize-table.el
 279                "please notify the org mailing list if you use this function."
 280                "Org 9.0")
 281
 282 (define-obsolete-function-alias
 283   'org-minutes-to-hh:mm-string 'org-minutes-to-clocksum-string "Org 8.0")
 284
 285 (defun org-remove-angle-brackets (s)
 286   (org-unbracket-string "<" ">" s))
 287 (make-obsolete 'org-remove-angle-brackets 'org-unbracket-string "Org 9.0")
 288
 289 (defun org-remove-double-quotes (s)
 290   (org-unbracket-string "\"" "\"" s))
 291 (make-obsolete 'org-remove-double-quotes 'org-unbracket-string "Org 9.0")
 292
 293 (define-obsolete-function-alias 'org-babel-number-p
 294   'org-babel--string-to-number "Org 9.0")
 295
 296
 297 \f
 298 ;;;; Obsolete link types
 299
 300 (eval-after-load 'org
 301   '(progn
 302      (org-link-set-parameters "file+emacs") ;since Org 9.0
 303      (org-link-set-parameters "file+sys"))) ;since Org 9.0
 304
 305
 306 \f
 307 ;;; Miscellaneous functions
 308
 309 (defun org-version-check (version feature level)
 310   (let* ((v1 (mapcar 'string-to-number (split-string version "[.]")))
 311          (v2 (mapcar 'string-to-number (split-string emacs-version "[.]")))
 312          (rmaj (or (nth 0 v1) 99))
 313          (rmin (or (nth 1 v1) 99))
 314          (rbld (or (nth 2 v1) 99))
 315          (maj (or (nth 0 v2) 0))
 316          (min (or (nth 1 v2) 0))
 317          (bld (or (nth 2 v2) 0)))
 318     (if (or (< maj rmaj)
 319             (and (= maj rmaj)
 320                  (< min rmin))
 321             (and (= maj rmaj)
 322                  (= min rmin)
 323                  (< bld rbld)))
 324         (if (eq level :predicate)
 325             ;; just return if we have the version
 326             nil
 327           (let ((msg (format "Emacs %s or greater is recommended for %s"
 328                              version feature)))
 329             (display-warning 'org msg level)
 330             t))
 331       t)))
 332
 333 (defun org-get-x-clipboard (value)
 334   "Get the value of the X or Windows clipboard."
 335   (cond ((and (eq window-system 'x)
 336               (fboundp 'gui-get-selection)) ;Silence byte-compiler.
 337          (org-no-properties
 338           (ignore-errors
 339             (or (gui-get-selection value 'UTF8_STRING)
 340                 (gui-get-selection value 'COMPOUND_TEXT)
 341                 (gui-get-selection value 'STRING)
 342                 (gui-get-selection value 'TEXT)))))
 343         ((and (eq window-system 'w32) (fboundp 'w32-get-clipboard-data))
 344          (w32-get-clipboard-data))))
 345
 346 (defun org-add-props (string plist &rest props)
 347   "Add text properties to entire string, from beginning to end.
 348 PLIST may be a list of properties, PROPS are individual properties and values
 349 that will be added to PLIST.  Returns the string that was modified."
 350   (add-text-properties
 351    0 (length string) (if props (append plist props) plist) string)
 352   string)
 353 (put 'org-add-props 'lisp-indent-function 2)
 354
 355 (defun org-fit-window-to-buffer (&optional window max-height min-height
 356                                            shrink-only)
 357   "Fit WINDOW to the buffer, but only if it is not a side-by-side window.
 358 WINDOW defaults to the selected window.  MAX-HEIGHT and MIN-HEIGHT are
 359 passed through to `fit-window-to-buffer'.  If SHRINK-ONLY is set, call
 360 `shrink-window-if-larger-than-buffer' instead, the height limit is
 361 ignored in this case."
 362   (cond ((if (fboundp 'window-full-width-p)
 363              (not (window-full-width-p window))
 364            ;; do nothing if another window would suffer
 365            (> (frame-width) (window-width window))))
 366         ((and (fboundp 'fit-window-to-buffer) (not shrink-only))
 367          (fit-window-to-buffer window max-height min-height))
 368         ((fboundp 'shrink-window-if-larger-than-buffer)
 369          (shrink-window-if-larger-than-buffer window)))
 370   (or window (selected-window)))
 371
 372 ;; `set-transient-map' is only in Emacs >= 24.4
 373 (defalias 'org-set-transient-map
 374   (if (fboundp 'set-transient-map)
 375       'set-transient-map
 376     'set-temporary-overlay-map))
 377
 378 ;;; Region compatibility
 379
 380 (defvar org-ignore-region nil
 381   "Non-nil means temporarily disable the active region.")
 382
 383 (defun org-region-active-p ()
 384   "Non-nil when the region active.
 385 Unlike to `use-region-p', this function also checks
 386 `org-ignore-region'."
 387   (and (not org-ignore-region) (use-region-p)))
 388
 389 (defun org-cursor-to-region-beginning ()
 390   (when (and (org-region-active-p)
 391              (> (point) (region-beginning)))
 392     (exchange-point-and-mark)))
 393
 394 ;;; Invisibility compatibility
 395
 396 (defun org-remove-from-invisibility-spec (arg)
 397   "Remove elements from `buffer-invisibility-spec'."
 398   (if (fboundp 'remove-from-invisibility-spec)
 399       (remove-from-invisibility-spec arg)
 400     (if (consp buffer-invisibility-spec)
 401         (setq buffer-invisibility-spec
 402               (delete arg buffer-invisibility-spec)))))
 403
 404 (defun org-in-invisibility-spec-p (arg)
 405   "Is ARG a member of `buffer-invisibility-spec'?"
 406   (if (consp buffer-invisibility-spec)
 407       (member arg buffer-invisibility-spec)))
 408
 409 (defun org-move-to-column (column &optional force _buffer)
 410   "Move to column COLUMN.
 411 Pass COLUMN and FORCE to `move-to-column'."
 412   (let ((buffer-invisibility-spec
 413          (if (listp buffer-invisibility-spec)
 414              (remove '(org-filtered) buffer-invisibility-spec)
 415            buffer-invisibility-spec)))
 416     (move-to-column column force)))
 417
 418 (defmacro org-find-library-dir (library)
 419   `(file-name-directory (or (locate-library ,library) "")))
 420
 421 (defun org-count-lines (s)
 422   "How many lines in string S?"
 423   (let ((start 0) (n 1))
 424     (while (string-match "\n" s start)
 425       (setq start (match-end 0) n (1+ n)))
 426     (if (and (> (length s) 0) (= (aref s (1- (length s))) ?\n))
 427         (setq n (1- n)))
 428     n))
 429
 430 (defun org-kill-new (string &rest args)
 431   (remove-text-properties 0 (length string) '(line-prefix t wrap-prefix t)
 432                           string)
 433   (apply 'kill-new string args))
 434
 435 ;; `font-lock-ensure' is only available from 24.4.50 on
 436 (defalias 'org-font-lock-ensure
 437   (if (fboundp 'font-lock-ensure)
 438       #'font-lock-ensure
 439     (lambda (&optional _beg _end)
 440       (with-no-warnings (font-lock-fontify-buffer)))))
 441
 442 ;; `file-local-name' was added in Emacs 26.1.
 443 (defalias 'org-babel-local-file-name
 444   (if (fboundp 'file-local-name)
 445       'file-local-name
 446     (lambda (file)
 447       "Return the local name component of FILE."
 448       (or (file-remote-p file 'localname) file))))
 449
 450 (defmacro org-no-popups (&rest body)
 451   "Suppress popup windows.
 452 Let-bind some variables to nil around BODY to achieve the desired
 453 effect, which variables to use depends on the Emacs version."
 454   (if (org-version-check "24.2.50" "" :predicate)
 455       `(let (pop-up-frames display-buffer-alist)
 456          ,@body)
 457     `(let (pop-up-frames special-display-buffer-names special-display-regexps special-display-function)
 458        ,@body)))
 459
 460 ;;;###autoload
 461 (defmacro org-check-version ()
 462   "Try very hard to provide sensible version strings."
 463   (let* ((org-dir        (org-find-library-dir "org"))
 464          (org-version.el (concat org-dir "org-version.el"))
 465          (org-fixup.el   (concat org-dir "../mk/org-fixup.el")))
 466     (if (require 'org-version org-version.el 'noerror)
 467         '(progn
 468            (autoload 'org-release     "org-version.el")
 469            (autoload 'org-git-version "org-version.el"))
 470       (if (require 'org-fixup org-fixup.el 'noerror)
 471           '(org-fixup)
 472         ;; provide fallback definitions and complain
 473         (warn "Could not define org version correctly.  Check installation!")
 474         '(progn
 475            (defun org-release () "N/A")
 476            (defun org-git-version () "N/A !!check installation!!"))))))
 477
 478 (defmacro org-with-silent-modifications (&rest body)
 479   (if (fboundp 'with-silent-modifications)
 480       `(with-silent-modifications ,@body)
 481     `(org-unmodified ,@body)))
 482 (def-edebug-spec org-with-silent-modifications (body))
 483
 484 ;; Functions for Emacs < 24.4 compatibility
 485 (defun org-define-error (name message)
 486   "Define NAME as a new error signal.
 487 MESSAGE is a string that will be output to the echo area if such
 488 an error is signaled without being caught by a `condition-case'.
 489 Implements `define-error' for older emacsen."
 490   (if (fboundp 'define-error) (define-error name message)
 491     (put name 'error-conditions
 492          (copy-sequence (cons name (get 'error 'error-conditions))))))
 493
 494 (unless (fboundp 'string-suffix-p)
 495   ;; From Emacs subr.el.
 496   (defun string-suffix-p (suffix string  &optional ignore-case)
 497     "Return non-nil if SUFFIX is a suffix of STRING.
 498 If IGNORE-CASE is non-nil, the comparison is done without paying
 499 attention to case differences."
 500     (let ((start-pos (- (length string) (length suffix))))
 501       (and (>= start-pos 0)
 502            (eq t (compare-strings suffix nil nil
 503                                   string start-pos nil ignore-case))))))
 504
 505 (provide 'org-compat)
 506
 507 ;;; org-compat.el ends here