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29b7722a 1GNU Emacs NEWS -- history of user-visible changes.
5b87ad55 2
ab422c4d 3Copyright (C) 2010-2013 Free Software Foundation, Inc.
5b87ad55 4See the end of the file for license conditions.
a933dad1 5
893db5bc 6Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
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7If possible, use M-x report-emacs-bug.
8
eb199145 9This file is about changes in Emacs version 24.
9a21d88b 10
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11See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12and NEWS.1-17 for changes in older Emacs versions.
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13
14You can narrow news to a specific version by calling `view-emacs-news'
15with a prefix argument or by typing C-u C-h C-n.
3f7194ed 16
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17Temporary note:
18+++ indicates that the appropriate manual has already been updated.
19--- means no change in the manuals is called for.
20When you add a new item, please add it without either +++ or ---
21so we will look at it and add it to the manual.
22
23\f
95a32efb 24* Installation Changes in Emacs 24.4
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25
26** Emacs can be compiled with POSIX ACL support.
27This happens by default if a suitable support library is found at
28build time, like libacl on GNU/Linux. To prevent this, use the
29configure option `--without-acl'.
30
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31** The configure option --with-crt-dir has been removed.
32It is no longer needed, as the crt*.o files are no longer linked specially.
33
c57b2d76 34\f
95a32efb 35* Startup Changes in Emacs 24.4
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36
37\f
95a32efb 38* Changes in Emacs 24.4
c6c08d3f 39
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40+++
41** `apropos-variable' is now `apropos-user-option'
42`apropos-user-option' shows all user options while `apropos-variable'
43shows all variables. When called with a universal prefix argument,
44the two commands swap their behaviors. When `apropos-do-all' is
45non-nil, they output the same results.
46
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47+++
48** `eval-defun' on an already defined defcustom calls the :set function,
49if there is one.
50
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51** If the new variable `enable-dir-local-variables' is nil,
52directory local variables are ignored. May be useful for some modes
53that want to ignore directory-locals while still respecting file-locals.
54
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55** The option `set-mark-default-inactive' has been deleted.
56This unfinished feature was introduced by accident in Emacs 23.1;
57simply disabling Transient Mark mode does the same thing.
58
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59** `initial-buffer-choice' can now specify a function to set up the
60initial buffer.
61
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62** ACL support has been added.
63+++
64*** Emacs preserves the ACL entries of files when backing up.
65+++
66*** New functions `file-acl' and `set-file-acl' get and set the ACL
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67entries of a file. On GNU/Linux, the POSIX ACL interface is used via
68libacl. On MS-Windows, the NT Security APIs are used to emulate the
69POSIX ACL interfaces.
7c3d167f 70
99548339 71** New option `scroll-bar-adjust-thumb-portion'.
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72Available only on X, this option allows to control over-scrolling
73using the scroll bar (i.e. dragging the thumb down even when the end
74of the buffer is visible).
99548339 75
c57b2d76 76\f
95a32efb 77* Editing Changes in Emacs 24.4
4f0552c2 78
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79** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
80bound to <f11> and M-<f10>, respectively.
37f38bca 81
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82** In keymaps where SPC scrolls, S-SPC now scrolls in the reverse direction.
83Eg View mode, etc.
84
4f0552c2 85\f
95a32efb 86* Changes in Specialized Modes and Packages in Emacs 24.4
4f0552c2 87
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88** Recentf looks for ~/.emacs.d/recentf additionally to ~/.recentf.
89
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90** Delphi mode is now called OPascal mode.
91*** All delphi-* variables and functions have been renamed to opascal-*.
92*** `delphi-newline-always-indents' is not supported any more
93use `electric-indent-mode' instead.
94*** `delphi-tab' is gone, replaced by `indent-for-tab-command'.
95
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96** jit-lock-debug-mode lets you use the debuggers on code run via jit-lock.
97
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98** completing-read-multiple's separator can now be a regexp.
99The default separator is changed to allow surrounding spaces around the comma.
100
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101** Battery
102
103*** Battery information via the BSD `apm' utility is now supported.
104
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105** cl-lib
106
107*** New macro cl-tagbody.
108
109+++
110*** letf is now just an alias for cl-letf.
111
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112** Calc
113
114*** Calc by default now uses the Gregorian calendar for all dates, and
115uses January 1, 1 AD as its day number 1. Previously Calc used the
116Julian calendar for dates before September 14, 1752, and it used
117December 31, 1 BC as its day number 1; the new scheme is more
118consistent with Calendar's calendrical system and day numbering.
119
120*** The new variable `calc-gregorian-switch' lets you configure the
121date when Calc switches from the Julian to the Gregorian calendar.
122Nil, the default value, means to always use the Gregorian calendar.
123The value (YEAR MONTH DAY) means to start using the Gregorian calendar
124on the given date.
125
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126*** Support for ISO 8601 dates.
127
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128** Dired
129
130*** New minor mode `dired-hide-details-mode' hides details.
131
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132** ERC
133
134*** New option `erc-accidental-paste-threshold-seconds'.
135If set to a number, this can be used to avoid accidentally paste large
136amounts of data into the ERC input.
137
138** Icomplete is a bit more like IDO.
139*** key bindings to navigate through and select the completions.
140*** The icomplete-separator is customizable, and its default has changed.
141*** Removed icomplete-show-key-bindings.
142
2a43515a 143** Image mode
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144
145*** New commands `n' (`image-next-file') and `p' (`image-previous-file')
146visit the next image file and the previous image file in the same
147directory, respectively.
148
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149*** New commands to show specific frames of multi-frame images.
150`f' (`image-next-frame') and `b' (`image-previous-frame') visit the
151next or previous frame. `F' (`image-goto-frame') shows a specific frame.
152
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153---
154*** The command `image-mode-fit-frame' deletes other windows.
155When toggling, it restores the frame's previous window configuration.
156It also has an optional frame argument, which can be used by Lisp
157callers to fit the image to a frame other than the selected frame.
158
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159** Isearch
160
161*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
162and adds it to the search string.
163
5a3cbc03 164** MH-E has been updated to MH-E version 8.5.
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165See MH-E-NEWS for details.
166
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167---
168** The unrmail command converts from BABYL to mboxrd rather than mboxo.
169Customize `unrmail-mbox-format' to change this.
170
171---
172** Similarly, customize `rmail-mbox-format' to influence some minor aspects
173of how Rmail displays non-MIME messages.
174
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175+++
176** New function `ses-rename-cell' to give SES cells arbitrary names.
177
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178** trace-function was largely rewritten.
179New features include:
180- no prompting for the destination buffer, unless a prefix-arg was used.
181- additionally to prompting for a destination buffer, when a prefix-arg is
182 used, the user can enter a "context", i.e. Lisp expression whose value at the
183 time the function is entered/exited will be printed along with the function
184 name and arguments. Useful to trace the value of (current-buffer) or
185 (point) when the function is invoked.
186
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187** New command `delete-duplicate-lines' has two types of operation:
188when its arg ADJACENT is non-nil (when called interactively with C-u C-u)
189it works like the utility `uniq'. Otherwise by default it deletes
190duplicate lines everywhere in the region without regard to adjacency.
191
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192** New `cycle-spacing' command allows cycling between having just one
193space, no spaces, or reverting to the original spacing. Like
194`just-one-space' command it can handle or ignore newlines and
195leave different number of spaces.
196
aefa2ead 197** Tramp
26280467 198
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199+++
200*** New connection method "adb", which allows to access Android
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201devices by the Android Debug Bridge. The variable `tramp-adb-program'
202can be used to adapt the path of the "adb" program, if needed.
26280467 203
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204*** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
205"scpc" and "rsyncc" are discontinued. The ssh option
206"ControlMaster=auto" is set automatically in all ssh-based methods,
207when possible.
26280467 208
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209+++
210*** Handlers for `file-acl' and `set-file-acl' for remote machines
211which support POSIX ACLs.
aefa2ead 212
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213** Woman
214
215*** The commands `woman-default-faces' and `woman-monochrome-faces'
216are obsolete. Customize the `woman-* faces instead.
217
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218** Obsolete packages:
219
220*** longlines.el is obsolete; use visual-line-mode instead.
221
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222*** terminal.el is obsolete; use term.el instead.
223
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224+++
225*** yow.el is obsolete; use fortune.el or cookie1.el instead.
226
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227---
228*** The Info-edit command is obsolete. Editing Info nodes by hand
229has not been relevant for some time.
230
4f0552c2 231\f
95a32efb 232* New Modes and Packages in Emacs 24.4
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233** New nadvice.el package offering lighter-weight advice facilities.
234It is layered as:
235- add-function/remove-function which can be used to add/remove code on any
236 function-carrying place, such as process-filters or `<foo>-function' hooks.
237- advice-add/advice-remove to add/remove a piece of advice on a named function,
238 much like `defadvice' does.
239
c57b2d76 240\f
95a32efb 241* Incompatible Lisp Changes in Emacs 24.4
da03ef8a 242
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243** `read-event' does not return decoded chars in ttys any more.
244Just as was the case in Emacs-22 and before, decoding of tty input according to
245keyboard-coding-system is not performed in read-event any more. But contrary
246to that past, it is still done before input-decode-map/function-key-map/...
247
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248** Removed inhibit-local-menu-bar-menus.
249
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250** frame-local variables that affect redisplay do not work any more.
251More specifically, the redisplay does not bother to check for a frame-local
252value when looking up variables.
253
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254** nil and "unbound" are indistinguishable in symbol-function.
255`symbol-function' never signals `void-function' any more.
256`fboundp' returns non-nil if the symbol was `fset' to nil.
257
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258** `defadvice' does not honor the `freeze' flag and cannot advise
259special-forms any more.
7db1bda8 260
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261** `dolist' in lexical-binding mode does not bind VAR in RESULT any more.
262VAR was bound to nil which was not tremendously useful and just lead to
263spurious warnings about an unused var.
264
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265** The return value of `backup-buffer' has changed.
266The second argument is no longer an SELinux context, instead it is an
267alist of extended attributes as returned by the new function
268`file-extended-attributes'. The attributes can be applied to another
269file using `set-file-extended-attributes'.
270
c57b2d76 271\f
97a1cd9d 272* Lisp Changes in Emacs 24.4
57618ecf 273
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274** `dont-compile' is declared obsolete.
275
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276** Support for filesystem notifications.
277Emacs now supports notifications of filesystem changes, such as
278creation, modification, and deletion of files. This requires the
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279'inotify' API on GNU/Linux systems. On MS-Windows systems, this is
280supported for Windows XP and newer versions.
81606b10 281
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282** Changes in autorevert.el
283
284---
285*** If Emacs is compiled with file notification support, notifications
286are used instead of checking the time stamp of the files. You can
287disable this by setting the user option `auto-revert-use-notify' to
288nil. Alternatively, a regular expression of directories to be
289excluded from file notifications can be specified by
290`auto-revert-notify-exclude-dir-regexp'.
291
292---
293*** The new user option `auto-revert-remote-files' enables reversion
294of remote files when set to non-nil.
295
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296** Face changes
297
298*** The `face-spec-set' is now analogous to `setq' for face specs.
299Its third arg now accepts values specifying exactly which face spec to
300set (defface, custom, or user spec), and it directly sets the relevant
301property using the supplied face spec.
302
303*** Face specs set via Custom themes now replace the `defface' spec
304rather than inheriting from it (as do face specs set via Customize).
305
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306*** New face characteristic (supports :underline (:style wave))
307specifies whether or not the terminal can display a wavy line.
308
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309** Image API
310
311+++
312*** `image-animated-p' is now `image-multi-frame-p'.
313It returns non-nil for any image that contains multiple frames,
314whether or not it specifies a frame delay.
315
316+++
317*** When animating images that do not specify a frame delay,
318Emacs uses `image-default-frame-delay'.
319
320+++
321*** New functions `image-current-frame' and `image-show-frame' for getting
322and setting the current frame of a multi-frame image.
323
855b17af 324** time-to-seconds is not obsolete any more.
231d8498 325** New function special-form-p.
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326** Docstrings can be made dynamic by adding a `dynamic-docstring-function'
327text-property on the first char.
328
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329** The `defalias-fset-function' property lets you catch calls to defalias
330and redirect them to your own function instead of `fset'.
331
70743157 332** The lock for 'DIR/FILE' is now 'DIR/.#FILE' and may be a regular file.
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333When you edit DIR/FILE, Emacs normally creates a symbolic link
334DIR/.#FILE as a lock that warns other instances of Emacs that DIR/FILE
335is being edited. Formerly, if there was already a non-symlink file
336named DIR/.#FILE, Emacs fell back on the lock names DIR/.#FILE.0
337through DIR/.#FILE.9. These fallbacks have been removed, so that
338Emacs now no longer locks DIR/FILE in that case.
339
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340On file systems that do not support symbolic links, the lock is now a
341regular file with contents being what would have been in the symlink.
b5029e23 342
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343** The 9th element returned by `file-attributes' is now unspecified.
344Formerly, it was t if the file's gid would change if file were deleted
345and recreated. This value has been inaccurate for years on many
346platforms, and nobody seems to have noticed or cared.
347
348** The function `file-ownership-preserved-p' now has an optional
349argument GROUP which causes it check for file group too. This can be
350used in place of the 9th element of `file-attributes'.
351
352** New functions `group-gid' and `group-real-gid'.
353
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354** The 6th argument to `copy-file' has been renamed to
355`preserve-extended-attributes' as it now handles both SELinux context
356and ACL entries.
357
c57b2d76 358\f
97a1cd9d 359* Changes in Emacs 24.4 on Non-Free Operating Systems
95a32efb 360
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361+++
362** The "generate a backtrace on fatal error" feature now works on MS Windows.
363The backtrace is written to the 'emacs_backtrace.txt' file in the
364directory where Emacs was running.
365
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366+++
367** The variable `buffer-file-type' is no longer supported.
368Setting it has no effect, and %t in the mode-line format is ignored.
369Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
370modifying it has no effect.
371
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372---
373** Lock files now work on MS-Windows.
374This allows to avoid losing your edits if the same file is being
375edited in another Emacs session or by another user. See the node
376"Interlocking" in the Emacs User Manual for the details. To disable
377file locking, customize `create-lockfiles' to nil.
378
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379** Improved fullscreen support on Mac OS X.
380Both native (>= OSX 10.7) and "old style" fullscreen are supported.
381Customize `ns-use-native-fullscreen' to change style. For >= 10.7
382native is the default.
383
95a32efb 384\f
2a1e2476 385* Installation Changes in Emacs 24.3
b8df54ff 386
6bc66c10 387** The default X toolkit is now Gtk+ version 3.
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388If you don't pass `--with-x-toolkit' to configure, or if you use
389`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
390to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
d71a6517 391You can explicitly require a specific version by passing
823b2fb6 392`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
da3d2105 393
6bc66c10 394** New configure option `--enable-link-time-optimization', to utilize
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395an appropriate feature provided by GCC since version 4.5.0.
396
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397** New configure option `--without-all' to disable most of the optional
398features (image support, etc.) that are normally enabled by default.
b8df54ff 399
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400** New configure option `--enable-gcc-warnings' (for developing/debugging
401Emacs). If building with GCC, this enables compile-time checks that
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402warn/give errors about possibly-questionable C code. On a recent GNU
403system there should be no warnings; on older and on non-GNU systems
404the results may be useful to developers.
b8df54ff 405
823b2fb6 406** The configure option `--enable-use-lisp-union-type' has been
6bc66c10 407renamed to `--enable-check-lisp-object-type', as the resulting
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408Lisp_Object type no longer uses a union to implement the compile time
409check that this option enables.
410
823b2fb6 411** The configure option `--disable-maintainer-mode' has been removed,
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412as it was confusingly-named and rarely useful.
413
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414** The configure options `--program-prefix', `--program-suffix', and
415`--program-transform-name' apply to more than just the installed
416binaries. Now they also affect the man pages, icons, and the
417etc/emacs.desktop file; but not the info pages, since this would break
418links between the various manuals.
1a9c6830 419
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420** You can use `NO_BIN_LINK=t make install' to prevent the installation
421overwriting "emacs" in the installation bin/ directory with a link
6bc66c10 422to "emacs-VERSION".
823b2fb6 423
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424** Emacs uses libtinfo in preference to libncurses, if available.
425
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426** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
427/usr/pkg/lib to the linker search path. You must add them yourself if
428you want them.
429
6bc66c10 430** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
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431(from the bin and libexec directories, respectively). The former is
432no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
433
a1ed8b05 434\f
2a1e2476 435* Startup Changes in Emacs 24.3
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436
437** Emacs no longer searches for `leim-list.el' files beneath the standard
438lisp/ directory. There should not be any there anyway. If you have
823b2fb6 439been adding them there, put them somewhere else; e.g., site-lisp.
e5fcdb5e 440
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441** The `--no-site-lisp' command line option now works for Nextstep builds.
442
a1ed8b05 443\f
2a1e2476 444* Changes in Emacs 24.3
a1ed8b05 445
6bc66c10 446** Help
c89926a5 447
6bc66c10 448*** `C-h f' (`describe-function') can now perform autoloading.
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449When this command is called for an autoloaded function whose docstring
450contains a key substitution construct, that function's library is
451automatically loaded, so that the documentation can be shown
452correctly. To disable this, set `help-enable-auto-load' to nil.
453
454*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
455even after their associated libraries have been loaded (and the
456autoloads have been redefined as functions).
457
6bc66c10 458** ImageMagick
cd996018 459
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460*** Images displayed via ImageMagick now support transparency and the
461:background image specification property.
cd996018 462
6bc66c10 463*** When available, ImageMagick support is automatically enabled.
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464It is no longer necessary to call `imagemagick-register-types'
465explicitly to install ImageMagick image types; that function is called
7d806bfe 466automatically at startup, or when customizing an imagemagick- option.
2f940384 467
c505aaeb 468*** Setting `imagemagick-types-inhibit' to t now disables the use of
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469ImageMagick to view images. (You must call `imagemagick-register-types'
470afterwards if you do not use customize to change this.)
2f940384 471
7afbaca4 472*** The new variable `imagemagick-enabled-types' also affects which
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473ImageMagick types are treated as images. The function
474`imagemagick-filter-types' returns the list of types that will be
475treated as images.
c505aaeb 476
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477** Minibuffer
478
479*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
480next and previous path separator, respectively.
c505aaeb 481
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482*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
483in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
484non-nil before enabling the mode.
485
486** Mode line
487
488*** New option `mode-line-default-help-echo' specifies the help text
489(shown in a tooltip or in the echo area) for any part of the mode line
490that does not have its own specialized help text.
491
492*** You can now click mouse-3 in the coding system indicator to invoke
493`set-buffer-file-coding-system'.
494
495** Server and client
2f940384 496
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497*** emacsclient now obeys string values for `initial-buffer-choice',
498if it is told to open a new frame without specifying any file to visit
499or expression to evaluate.
db80bdc8 500
f938eda9 501*** New option `server-auth-key' specifies a shared server key.
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502
503** Emacs now generates backtraces on fatal errors.
504On encountering a fatal error, Emacs now outputs a textual description
505of the fatal signal, and a short backtrace on platforms like glibc
5248293f 506that support backtraces.
2e2d2a13 507
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508** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
509This minor mode replaces `toggle-read-only', which is now obsolete.
510
511** Most `y-or-n' prompts now allow you to scroll the selected window.
512Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
513respectively, without exiting from the prompt.
514
515** In the Package Menu, newly-available packages are listed as "new",
516and sorted above the other "available" packages by default.
517
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518** If your Emacs was built from a bzr checkout, the new variable
519`emacs-bzr-version' contains information about the bzr revision used.
de6ff46d 520
6bc66c10 521** New option `create-lockfiles' specifies usage of lockfiles.
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522It defaults to t. Changing it to nil inhibits the creation of lock
523files (use this with caution).
dc0f75c8 524
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525** New option `enable-remote-dir-locals', if non-nil, allows directory-local
526variables on remote hosts.
21ffb35a 527
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528** The entry for PCL-CVS has been removed from the Tools menu.
529The PCL-CVS commands are still available via the keyboard.
530
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531** Using "unibyte: t" in Lisp source files is obsolete.
532Use "coding: raw-text" instead.
533
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534** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
535has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
536The previous binding, introduced in Emacs 24.1, was a mistake, because
537`C-c LETTER' bindings are reserved for user customizations.
538
6bc66c10 539** Internationalization
2f940384 540
f938eda9 541*** New language environment: Persian.
2f940384 542
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543*** New input method `vietnamese-vni'.
544
6bc66c10 545** Nextstep (GNUstep / Mac OS X) port
2f940384 546
823b2fb6 547*** Support for fullscreen and the frame parameter fullscreen.
2f940384 548
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549*** A file dialog is used for open/save operations initiated from the
550menu/toolbar.
551
a1ed8b05 552\f
2a1e2476 553* Editing Changes in Emacs 24.3
c25df26e 554
6bc66c10 555** Search and Replace
d39d3c8e 556
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557*** Non-regexp Isearch now performs "lax" space matching.
558Each sequence of spaces in the supplied search string may match any
559sequence of one or more whitespace characters, as specified by the
560variable `search-whitespace-regexp'. (This variable is also used by a
823b2fb6 561similar existing feature for regexp Isearch.)
2f940384 562
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563*** New Isearch command `M-s SPC' toggles lax space matching.
564This applies to both ordinary and regexp Isearch.
2f940384 565
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566*** New option `replace-lax-whitespace'.
567If non-nil, `query-replace' uses flexible whitespace matching too.
568The default is nil.
2f940384 569
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570*** Global `M-s _' starts a symbol (identifier) incremental search,
571and `M-s _' in Isearch toggles symbol search mode.
572`M-s c' in Isearch toggles search case-sensitivity.
573
6bc66c10 574** Navigation commands
48de8b12 575
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576*** New binding `M-g c' for `goto-char'.
577
578*** New binding `M-g TAB' for `move-to-column'.
579
580*** `M-g TAB' (`move-to-column') prompts for a column number if called
581interactively with no prefix arg. Previously, it moved to column 1.
582
583** New option `yank-handled-properties' allows processing of text
584properties on yanked text, in ways that are more general than just
585removing them (as is done by `yank-excluded-properties').
48de8b12 586
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587** New option `delete-trailing-lines' specifies whether
588M-x delete-trailing-whitespace should delete trailing lines at the end
589of the buffer. It defaults to t.
590
f938eda9 591** `C-u M-=' now counts lines/words/characters in the entire buffer.
826b3235 592
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593** `C-x 8 RET' is now bound to `insert-char', which is now a command.
594`ucs-insert' is now an obsolete alias for `insert-char'.
b2459884 595
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596** The `z' key no longer has a binding in most special modes.
597It used to be bound to `kill-this-buffer', but `z' is too easy to
598accidentally type.
f938eda9 599
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600** New command `C-x r M-w' (`copy-rectangle-as-kill').
601It copies the region-rectangle as the last rectangle kill.
f938eda9 602
6bc66c10 603** Registers
f938eda9 604
823b2fb6 605*** `C-x r +' is now overloaded to invoke `append-to-register'.
f938eda9 606
f938eda9 607*** New option `register-separator' specifies the register containing
823b2fb6
GM
608the text to put between collected texts for use with
609M-x append-to-register and M-x prepend-to-register.
f1f4dba0 610
a1ed8b05 611\f
2a1e2476 612* Changes in Specialized Modes and Packages in Emacs 24.3
ae4969c2 613
6bc66c10 614** Common Lisp emulation (CL)
f938eda9 615
89660017 616*** CL's main entry is now (require 'cl-lib).
823b2fb6
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617`cl-lib' is like the old `cl' except that it uses the namespace cleanly;
618i.e., all its definitions have the "cl-" prefix (and internal definitions
619use the "cl--" prefix).
7c1898a7 620
823b2fb6
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621If `cl' provided a feature under the name `foo', then `cl-lib'
622provides it under the name `cl-foo' instead; with the exceptions of the
623few `cl' definitions that had to use `foo*' to avoid conflicts with
624pre-existing Elisp entities. These have been renamed to `cl-foo'
625rather than `cl-foo*'.
7c1898a7 626
92246540 627The old `cl' is now deprecated and is mainly just a bunch of aliases that
823b2fb6 628provide the old, non-prefixed names. Some exceptions are listed below:
7c1898a7 629
89660017
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630*** `cl-flet' is not like `flet' (which is deprecated).
631Instead it obeys the behavior of Common-Lisp's `flet'.
e8693c96
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632In particular, in cl-flet function definitions are lexically scoped,
633whereas in flet the scoping is dynamic.
89660017
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634
635*** `cl-labels' is slightly different from `labels'.
823b2fb6
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636The difference is that it relies on the `lexical-binding' machinery
637(as opposed to the `lexical-let' machinery used previously) to capture
638definitions in closures, so such closures will only work if `lexical-binding'
639is in use.
89660017 640
f94b04fc 641*** `cl-letf' is not exactly like `letf'.
4ddedf94
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642The only difference is in details that relate to some deprecated usage
643of `symbol-function' in place forms.
f94b04fc 644
89660017 645*** `progv' was rewritten to use the `let' machinery.
823b2fb6
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646A side effect is that variables without corresponding values are bound
647to nil rather than being made unbound.
89660017 648
9512f820
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649*** The following methods of extending `setf' are obsolete
650(use features from gv.el instead):
651`define-modify-macro' (use `gv-letplace')
031b2ea7
GM
652`defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
653`define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
2b4da3ff 654`get-setf-method' no longer exists (see "Incompatible Lisp Changes")
f94b04fc 655
6bc66c10 656** Diff mode
f938eda9 657
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658*** Changes are now highlighted using the same color scheme as in
659modern VCSes. Deletions are displayed in red (new faces
660`diff-refine-removed' and `smerge-refined-removed', and new definition
661of `diff-removed'), insertions in green (new faces `diff-refine-added'
662and `smerge-refined-added', and new definition of `diff-added').
f938eda9 663
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664*** The variable `diff-use-changed-face' defines whether to use the
665face `diff-changed', or `diff-removed' and `diff-added' to highlight
666changes in context diffs.
2f940384 667
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668*** The new command `diff-delete-trailing-whitespace' removes trailing
669whitespace introduced by a diff.
f938eda9 670
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671** Ediff now uses the same color scheme as Diff mode.
672
673** Python mode
674
675A new version of python.el, which provides several new features, including:
676per-buffer shells, better indentation, Python 3 support, and improved
677shell-interaction compatible with iPython (and virtually any other
678text based shell).
679
680*** Some user options have been replaced/renamed, including (old -> new):
681**** python-indent -> python-indent-offset
682**** python-guess-indent -> python-indent-guess-indent-offset
683**** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
684**** python-use-skeletons -> python-skeleton-autoinsert
685
686*** Some user options have been removed, including:
687
688**** `python-indent-string-contents': Strings are never indented.
689
690**** `python-honour-comment-indentation':
d5b1b1aa 691Comments are always considered as indentation markers.
6bc66c10
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692
693**** `python-continuation-offset': Indentation is automatically
694calculated in a pep8 compliant way depending on the context.
695
696**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
697Have no direct mapping as the shell interaction is completely different.
698
699**** `python-python-command', `python-jython-command':
700Replaced by `python-shell-interpreter'.
701
702**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
703`python-pdbtrack-minor-mode-string', `python-source-modes':
704No longer relevant.
705
706*** Some commands have been replaced (old -> new):
707**** python-insert-class -> python-skeleton-class
708**** python-insert-def -> python-skeleton-def
709**** python-insert-for -> python-skeleton-for
710**** python-insert-if -> python-skeleton-if
711**** python-insert-try/except -> python-skeleton-try
712**** python-insert-try/finally -> python-skeleton-try
713**** python-insert-while -> python-skeleton-while
714**** python-find-function -> python-nav-jump-to-defun
715**** python-next-statement -> python-nav-forward-sentence
716**** python-previous-statement -> python-nav-backward-sentence
717**** python-beginning-of-defun-function -> python-nav-beginning-of-defun
718**** python-end-of-defun-function -> python-nav-end-of-defun
719**** python-send-buffer -> python-shell-send-buffer
720**** python-send-defun -> python-shell-send-defun
721**** python-send-region -> python-shell-send-region
722**** python-send-region-and-go -> emulate with python-shell-send-region
723and python-shell-switch-to-shell
724**** python-send-string -> python-shell-send-string
725**** python-switch-to-python -> python-shell-switch-to-shell
726**** python-describe-symbol -> python-eldoc-at-point
e76f0800 727
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728** D-Bus
729
f938eda9
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730*** New variables `dbus-compiled-version' and `dbus-runtime-version'.
731
f938eda9
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732*** The D-Bus object manager interface is implemented.
733
f938eda9
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734*** Variables of type :(u)int32 and :(u)int64 accept floating points,
735if their value does not fit into Emacs's integer range.
736
823b2fb6
GM
737*** The function `dbus-call-method' is now non-blocking.
738It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
f938eda9 739
823b2fb6 740*** Signals can also be sent as unicast messages.
f938eda9 741
f938eda9 742*** The argument list of `dbus-register-signal' has been extended,
6bc66c10 743according to the new match rule types of D-Bus.
f938eda9 744
f938eda9
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745*** `dbus-init-bus' supports private connections.
746
f938eda9
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747*** There is a new function `dbus-setenv'.
748
6bc66c10
GM
749** `desktop-path' no longer includes the "." directory.
750Desktop files are now located in ~/.emacs.d by default.
f938eda9
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751
752** Dired
2f940384 753
f938eda9
CY
754*** `dired-do-async-shell-command' executes each file sequentially
755if the command ends in `;' (when operating on multiple files).
756Otherwise, it executes the command on each file in parallel.
2f940384 757
823b2fb6
GM
758*** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
759`dired-do-chown', and `dired-do-touch' yanks the attributes of the
f938eda9 760file at point.
2f940384 761
f938eda9 762*** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
823b2fb6 763`DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
f938eda9 764mark/unmark/flag all files in the active region.
2f940384 765
f938eda9
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766*** The minibuffer default for `=' (`dired-diff) has changed.
767It is now the backup file for the file at point, if one exists.
768In Transient Mark mode the default is the file at the active mark.
2f940384 769
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770*** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
771The global binding for `M-=', `count-words-region' is in effect.
772
02969baf
GM
773** ERC
774
6e5e9b70
GM
775*** New module "notifications", which can send a notification when you
776receive a private message or your nickname is mentioned.
02969baf
GM
777
778*** ERC will look up server/channel names via auth-source and use any
779channel keys found.
f938eda9 780
274f5de6
GM
781*** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
782only applies to messages sent by lurkers.
f925b109 783
6bc66c10 784** reStructuredText mode
f938eda9 785
6bc66c10
GM
786*** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
787fontification, comment handling, and customization have all been revised
788and improved.
f938eda9 789
6bc66c10 790*** Support for `imenu' and `which-function-mode'.
f938eda9 791
6bc66c10
GM
792*** The reStructuredText syntax is more closely covered.
793Sphinx support has been improved.
f938eda9 794
6bc66c10 795*** `rst-insert-list' inserts new list or continues existing lists.
f938eda9 796
6bc66c10 797*** A negative prefix argument always works for `rst-adjust'.
f938eda9 798
6bc66c10 799*** The window configuration is reset after displaying a TOC.
bc7be45d 800
6bc66c10 801*** The constant `rst-version' describes the rst.el package version.
358c19d9 802
dba3cda3
GM
803** Ruby mode
804
805*** Support for percent literals and recognition of regular expressions
806in method calls without parentheses with more methods, including Cucumber
807steps definitions.
808
809*** Improved syntax highlighting and indentation.
810
811*** New command `ruby-toggle-block', bound to `C-c {'.
812
813*** Some non-standard keybindings/commands have been removed:
814
815**** `ruby-electric-brace'; use `electric-indent-mode' instead.
816
817**** `ruby-mark-defun'; use `mark-defun'.
818
819**** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
820appropriate settings for the variables `beginning-of-defun-function'
821and `end-of-defun-function'.
822
823**** Non-standard keybindings for `backward-kill-word', `comment-region',
824`reindent-then-newline-and-indent' and `newline' have been removed.
825
6bc66c10 826** Shell Script mode
40d8bcb8 827
6bc66c10 828*** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
40d8bcb8 829
6bc66c10 830*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
40d8bcb8 831
6bc66c10 832*** `sh-use-smie' lets you choose a new indentation and navigation code.
40d8bcb8 833
6bc66c10 834** VHDL mode
40d8bcb8 835
6bc66c10 836*** The free software compiler GHDL is supported (and now the default).
40d8bcb8 837
6bc66c10 838*** Support for the VHDL-AMS packages has been added/updated.
40d8bcb8 839
6bc66c10 840*** Updated to the 2002 revision of the VHDL standard.
40d8bcb8 841
6bc66c10 842*** Accepts \r and \f as whitespace.
40d8bcb8 843
6bc66c10 844** Apropos
40d8bcb8 845
6bc66c10
GM
846*** The faces used by Apropos are now directly customizable.
847These faces are named `apropos-symbol', `apropos-keybinding', and so on;
848see the `apropos' Custom group for details.
d13c8be6 849
6bc66c10
GM
850*** The old options whose values specified faces to use have been removed
851(i.e. `apropos-symbol-face', `apropos-keybinding-face', etc.).
d13c8be6 852
6bc66c10 853** Buffer Menu
d13c8be6 854
6bc66c10 855*** This package has been rewritten to use Tabulated List mode.
d13c8be6 856
6bc66c10
GM
857*** Option `Buffer-menu-buffer+size-width' is now obsolete.
858Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
d13c8be6 859
86e100a6
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860** Calc
861
862*** Algebraic simplification mode is now the default.
863To restrict to the limited simplifications given by the former
864default simplification mode, use `m I'.
865
6bc66c10 866** Calendar
d13c8be6 867
6bc66c10
GM
868*** You can customize the header text that appears above each calendar month.
869See the variable `calendar-month-header'.
d13c8be6 870
6bc66c10 871*** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
ee97deee 872
6bc66c10
GM
873*** The calendars produced by cal-html include holidays.
874Customize `cal-html-holidays' to change this.
8b0823d6 875
0058cae2
GM
876** CEDET
877
878*** The major modes from the parser generators "Bovine" and "Wisent"
879are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
880are in `auto-mode-alist', and the corresponding manuals are included.
881
882*** EDE
883
884**** Menu support for the "Configuration" feature. This allows users to
885choose the active configuration (such as debug or install) from the menu.
886
887**** New command `ede-set' to interactively set project-local variables.
888
889**** Support for compiling, debugging, and running in "generic" projects.
890
891**** Autoconf editing support for M4 macros with complex arguments.
892
893**** Compilation support for the "linux" project type.
894
895**** "simple" projects have been removed; use "generic" projects instead.
896
897*** Semantic
898
899**** Support for parsing #include statements inside a namespace in C/C++.
900
901**** Improved support for 'extern "C"' declarations in C/C++.
902
903**** The ability to ignore more common special C/C++ preprocessor symbols,
904such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
905If available, include cdefs.h as an additional source of preprocessor symbols.
906
907**** Improved C/C++ function pointer parsing.
908
909**** In Python, support for converting imports to include file names.
910
911**** Ability to dynamically determine the Python load path.
912
913**** Support for the Python 'WITH' and 'AT' keywords.
914
915**** Improved tooltip completion.
916
917*** SRecode
918
919**** The SRecode manual is now included.
920
921**** Tag generation supports constructor/destructor settings and system
922include differentiation.
923
924**** Addition of 'Framework' support: Frameworks are specified when a
925particular kind of library (such as Android) is needed in a common language
926mode (like Java).
927
928**** Support for nested templates and let variables override based on priority.
929
930**** Support for merging tables from multiple related modes, such as
931default -> c++ -> arduino.
932
6bc66c10 933** Compile has a new option `compilation-always-kill'.
42917e79 934
6bc66c10 935** Customize
35d98877 936
6bc66c10 937*** `custom-reset-button-menu' now defaults to t.
35d98877 938
6bc66c10
GM
939*** Non-option variables are never matched in `customize-apropos' and
940`customize-apropos-options' (i.e., the prefix argument does nothing for
941these commands now).
782fbf2a 942
f938eda9 943** Term
782fbf2a 944
823b2fb6
GM
945*** The variables `term-default-fg-color' and `term-default-bg-color'
946are now deprecated in favor of the customizable face `term'.
fc72b15c 947
02969baf
GM
948*** You can customize how to display ANSI terminal colors and styles
949by customizing the corresponding `term-color-<COLOR>',
950`term-color-underline' and `term-color-bold' faces.
cf20dee0 951
05ecb497 952** Tramp
2f940384 953
02969baf 954*** The syntax has been extended in order to allow ad-hoc proxy definitions.
05ecb497 955
823b2fb6 956*** Remote processes are now also supported on remote MS-Windows hosts.
05ecb497 957
ce7b18ec 958** URL
2f940384 959
ce7b18ec
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960*** Structs made by `url-generic-parse-url' have nil `attributes' slot.
961Previously, this slot stored semicolon-separated attribute-value pairs
962appended to some imap URLs, but this is not compatible with RFC 3986.
823b2fb6 963So now the `filename' slot stores the entire path and query components,
ce7b18ec 964and the `attributes' slot is always nil.
2f940384 965
ce7b18ec
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966*** New function `url-encode-url' for encoding a URI string.
967The `url-retrieve' function now uses this to encode its URL argument,
968in case that is not properly encoded.
969
6bc66c10
GM
970** notifications.el supports now version 1.2 of the Notifications API.
971The function `notifications-get-capabilities' returns the supported
972server properties.
f938eda9 973
6bc66c10
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974** Flymake uses fringe bitmaps to indicate errors and warnings.
975See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
976`flymake-warning-bitmap'.
f938eda9 977
6bc66c10
GM
978** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
979specifying URL types that should be converted to remote file names at
980the FFAP prompt. The default is now '("ftp").
f938eda9 981
6bc66c10
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982** New Ibuffer `derived-mode' filter, bound to `/ M'.
983The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
f938eda9 984
6bc66c10
GM
985** New option `mouse-avoidance-banish-position' specifies where the
986`banish' mouse avoidance setting moves the mouse.
ce7b18ec 987
6bc66c10
GM
988** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
989closing brackets to be aligned with the line of the opening bracket.
f938eda9 990
6bc66c10 991** In Proced mode, new command `proced-renice' renices marked processes.
f938eda9 992
6bc66c10
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993** New option `async-shell-command-buffer' specifies the buffer to use
994for a new asynchronous `shell-command' when the default output buffer
995`*Async Shell Command*' is already in use.
f938eda9 996
6bc66c10
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997** SQL mode has a new option `sql-db2-escape-newlines'.
998If non-nil, newlines sent to the command interpreter will be escaped
999by a backslash. The default does not escape the newlines and assumes
1000that the sql statement will be terminated by a semicolon.
f938eda9 1001
6bc66c10
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1002** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1003(and modes that derive from it), sorts the column at point, or the Nth
1004column if a numeric prefix argument is given.
f938eda9 1005
02969baf 1006** `which-func-modes' now defaults to t, so Which Function mode, when
05b621a6 1007enabled, applies to all applicable major modes.
f938eda9 1008
6bc66c10 1009** `winner-mode-hook' now runs when the mode is disabled, as well as when
823b2fb6 1010it is enabled.
f938eda9 1011
6bc66c10
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1012** Follow mode no longer works by using advice.
1013The option `follow-intercept-processes' has been removed.
1014
1015** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
f938eda9 1016
d1069532
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1017** Hooks renamed to avoid obsolete "-hooks" suffix:
1018*** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1019*** semantic-change-hooks -> semantic-change-functions
1020*** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1021*** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1022*** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
1023*** semanticdb-save-database-hooks -> semanticdb-save-database-functions
1024*** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
1025*** rcirc-sentinel-hooks -> rcirc-sentinel-functions
1026*** rcirc-receive-message-hooks -> rcirc-receive-message-functions
1027*** rcirc-activity-hooks -> rcirc-activity-functions
1028*** rcirc-print-hooks -> rcirc-print-functions
1029*** dbus-event-error-hooks -> dbus-event-error-functions
1030*** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
1031*** checkdoc-style-hooks -> checkdoc-style-functions
1032*** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
1033*** archive-extract-hooks -> archive-extract-hook
1034*** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
1035*** hfy-post-html-hooks -> hfy-post-html-hook
1036*** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
1037*** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
1038*** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
1039*** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
f938eda9 1040
6bc66c10 1041** Obsolete packages
2f940384 1042
797e6e88
SM
1043*** assoc.el
1044In most cases, assoc+member+push+delq work just as well.
1045And in any case it's just a terrible package: ugly semantics, terrible
1046inefficiency, and not namespace-clean.
3c74813a 1047*** bruce.el
b4617547 1048*** cust-print.el
daed4003 1049*** ledit.el
82f289a4 1050*** mailpost.el
d57de7fe 1051*** mouse-sel.el
3c74813a 1052*** patcomp.el
1a9c6830 1053
a1ed8b05 1054\f
2a1e2476 1055* Incompatible Lisp Changes in Emacs 24.3
b4d3bc10 1056
6bc66c10
GM
1057** Docstrings starting with `*' no longer indicate user options.
1058Only variables defined using `defcustom' are considered user options.
1059The function `user-variable-p' is now an obsolete alias for
1060`custom-variable-p'.
090cf9db 1061
6bc66c10
GM
1062** The return values of `defalias', `defun' and `defmacro' have changed,
1063and are now undefined. For backwards compatibility, `defun' and
1064`defmacro' currently return the name of the newly defined
1065function/macro, but this should not be relied upon.
090cf9db 1066
823b2fb6
GM
1067** `random' by default now returns a different random sequence in
1068every Emacs run. Use `(random S)', where S is a string, to set the
0e23ef9d
PE
1069random seed to a value based on S, in order to get a repeatable
1070sequence in later calls.
1071
d32e47af
LM
1072** If the NEWTEXT arg to `replace-match' contains a substring "\?",
1073that substring is inserted literally even if the LITERAL arg is
1074non-nil, instead of causing an error to be signaled.
1075
2cec368c
MR
1076** `select-window' now always makes the window's buffer current.
1077It does so even if the window was selected before.
1078
6bc66c10
GM
1079** The function `x-select-font' can return a font spec, instead of a
1080font name as a string. Whether it returns a font spec or a font name
1081depends on the graphical library.
bbf908bc 1082
eeddc531
CY
1083** `face-spec-set' no longer sets frame-specific attributes when the
1084third argument is a frame (that usage was obsolete since Emacs 22.2).
1085
6bc66c10 1086** `set-buffer-multibyte' now signals an error in narrowed buffers.
a59d531e 1087
ab7f1c43
GM
1088** The CL package's `get-setf-method' function no longer exists.
1089Generalized variables are now part of core Emacs Lisp, and implemented
1090differently to the way cl.el used to do it. It is not possible to
1091define a compatible replacement for `get-setf-method'. See the file
1092gv.el for internal details of the new implementation.
1093
6bc66c10
GM
1094** The arguments of `dbus-register-signal' are no longer just strings,
1095but keywords or keyword-string pairs. The old argument list will
1096still be supported for Emacs 24.x.
72b255c7 1097
6bc66c10 1098** Miscellaneous name changes
823b2fb6
GM
1099Some Lisp symbols have been renamed to correct their spelling,
1100or to be more consistent with standard Emacs terminology.
72b255c7 1101
72b255c7 1102*** Renamed functions
72b255c7
PE
1103**** hangul-input-method-inactivate -> hangul-input-method-deactivate
1104**** inactivate-input-method -> deactivate-input-method
1105**** quail-inactivate -> quail-deactivate
1106**** robin-inactivate -> robin-deactivate
1107**** viper-inactivate-input-method -> viper-deactivate-input-method
1108**** viper-inactivate-input-method-action ->
1109 viper-deactivate-input-method-action
1110**** ucs-input-inactivate -> ucs-input-deactivate
1111
1112*** Renamed hooks
1113The old hooks are still supported for backward compatibility, but they
1114are deprecated and will be removed eventually.
72b255c7
PE
1115**** input-method-inactivate-hook -> input-method-deactivate-hook
1116**** robin-inactivate-hook -> robin-deactivate-hook
1117**** quail-inactivate-hook -> quail-deactivate-hook
1118
6bc66c10 1119*** Renamed variables
72b255c7
PE
1120**** follow-deactive-menu -> follow-inactive-menu
1121**** inactivate-current-input-method-function ->
1122 deactivate-current-input-method-function
1123
02969baf
GM
1124** Some obsolete functions, variables, and faces have been removed:
1125*** `last-input-char', `last-command-char', `unread-command-char'
78f3273a
CY
1126*** `facemenu-unlisted-faces'
1127*** `rmail-decode-mime-charset'
a5f2b6ec
CY
1128*** `iswitchb-read-buffer'
1129*** `sc-version', `sc-submit-bug-report'
1130*** `set-char-table-default'
02969baf 1131*** `string-to-sequence' (use `string-to-list' or `string-to-vector')
a5f2b6ec 1132*** `compile-internal'
02969baf 1133*** `modeline'
59f7af81 1134*** `mode-line-inverse-video'
02969baf 1135*** `follow-mode-off-hook'
a5f2b6ec 1136*** `cvs-commit-buffer-require-final-newline'
63820c5c 1137(use `log-edit-require-final-newline' instead)
a5f2b6ec
CY
1138*** `cvs-changelog-full-paragraphs'
1139(use `log-edit-changelog-full-paragraphs' instead)
1140*** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
1141*** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
1142*** `vc-master-templates' (use `vc-handled-backends' instead)
1143*** `vc-checkout-carefully'
78f3273a 1144
a1ed8b05 1145\f
93e0bed6 1146* Lisp Changes in Emacs 24.3
ef24141c 1147
2ee3d7f0 1148** CL-style generalized variables are now in core Elisp.
f938eda9 1149`setf' is autoloaded; `push' and `pop' accept generalized variables.
ebdbfb95
GM
1150You can define your own generalized variables using `gv-define-simple-setter',
1151`gv-define-setter', etc.
2ee3d7f0 1152
6bc66c10
GM
1153** Emacs tries to macroexpand interpreted (non-compiled) files during load.
1154This can significantly speed up execution of non-byte-compiled code,
1155but can also bump into previously unnoticed cyclic dependencies.
1156These are generally harmless: they will simply cause the macro calls
1157to be left for later expansion (as before), but will result in a
1158warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
1159You may wish to restructure your code so this does not happen.
1160
1161** New sampling-based Elisp profiler.
1162Try M-x profiler-start, do some work, and then call M-x profiler-report.
1163When finished, use M-x profiler-stop. The sampling rate can be based on
1164CPU time or memory allocations.
1165
500fcedc
SM
1166** `defun' also accepts a (declare DECLS) form, like `defmacro'.
1167The interpretation of the DECLS is determined by `defun-declarations-alist'.
1168
6bc66c10
GM
1169** New macros `setq-local' and `defvar-local'.
1170
1171** Face underlining can now use a wave.
2f940384 1172
6bc66c10 1173** `read-regexp' has a new argument HISTORY; the first argument PROMPT
cd996018 1174of `read-regexp' accepts a string ending with a colon and space, and its
823b2fb6 1175second argument DEFAULTS can be a list of strings accessible via `M-n'
cd996018
CY
1176in the minibuffer ahead of other hard-coded useful regexp-related values.
1177More commands use `read-regexp' now to read their regexp arguments.
1178
f938eda9 1179** Completion
500fcedc 1180
f938eda9
CY
1181*** New function `completion-table-with-quoting' to handle completion
1182in the presence of quoting, such as file completion in shell buffers.
f95e9344 1183
f938eda9
CY
1184*** New function `completion-table-subvert' to use an existing completion
1185table, but with a different prefix.
1186
6bc66c10 1187** Debugger
f95e9344 1188
f938eda9
CY
1189*** New error type and new function `user-error'.
1190These do not trigger the debugger.
f95e9344 1191
57fc0fee
GM
1192*** New option `debugger-bury-or-kill', saying what to do with the
1193debugger buffer when exiting debug.
45b82ad0
SM
1194
1195*** Set `debug-on-message' to enter the debugger when a certain
1196message is displayed in the echo area. This can be useful when trying
1197to work out which code is doing something.
2f940384 1198
45b82ad0
SM
1199*** New var `inhibit-debugger', automatically set to prevent accidental
1200recursive invocations.
fa2bcf43 1201
6bc66c10 1202** Window handling
2f940384 1203
6bc66c10
GM
1204*** New command `fit-frame-to-buffer' adjusts the frame height to
1205fit the contents.
2f940384 1206
6bc66c10
GM
1207*** The command `fit-window-to-buffer' can adjust the frame height
1208if the new option `fit-frame-to-buffer' is non-nil.
8e17c9ba 1209
7fe37cfc
GM
1210*** New macro `with-temp-buffer-window', similar to
1211`with-output-to-temp-buffer'.
fa2bcf43 1212
8e17c9ba
MR
1213*** `temp-buffer-resize-mode' no longer resizes windows that have been
1214reused.
c5e28e39 1215
823b2fb6 1216*** New option `switch-to-buffer-preserve-window-point' to restore a
43bcfda6 1217window's point when switching buffers.
7c82753d 1218
6bc66c10
GM
1219*** New display action alist entries `window-height' and `window-width'
1220specify the size of new windows created by `display-buffer'.
1221
1222*** New display action alist entry `pop-up-frame-parameters', if
1223non-nil, specifies frame parameters to give any newly-created frame.
7c82753d 1224
fa2bcf43
MR
1225*** New display action alist entry `inhibit-switch-frame', if non-nil,
1226tells display action functions to avoid changing which frame is
1227selected.
2f940384 1228
fa2bcf43
MR
1229*** New display action alist entry `previous-window', if non-nil,
1230specifies window to reuse in `display-buffer-in-previous-window'.
2f940384 1231
6bc66c10
GM
1232*** New display action functions `display-buffer-below-selected',
1233and `display-buffer-in-previous-window'.
1234
1235*** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
1236now accept a third argument to avoid choosing the selected window.
1237
1238*** Additional values recognized for option `window-combination-limit'.
5938d519 1239
77f1f99c
CY
1240*** The following variables are obsolete, as they can be replaced by
1241appropriate entries in the `display-buffer-alist' function introduced
1242in Emacs 24.1:
823b2fb6 1243**** `dired-shrink-to-fit'
77f1f99c 1244**** `display-buffer-reuse-frames'
823b2fb6 1245**** `display-buffer-function'
77f1f99c 1246**** `special-display-buffer-names'
823b2fb6 1247**** `special-display-frame-alist'
77f1f99c 1248**** `special-display-function'
823b2fb6 1249**** `special-display-regexps'
77f1f99c 1250
ab0fa4e4 1251** Time
2f940384 1252
ab0fa4e4
PE
1253*** `current-time-string' no longer requires that its argument's year
1254must be in the range 1000..9999. It now works with any year supported
1255by the underlying C implementation.
2f940384 1256
f938eda9
CY
1257*** `current-time' now returns extended-format time stamps
1258(HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
1259PSEC is typically a multiple of 1000 on current machines. Other
823b2fb6
GM
1260functions that use this format, such as `file-attributes' and
1261`format-time-string', have been changed accordingly. Old-format time
f938eda9 1262stamps are still accepted.
2f940384 1263
823b2fb6 1264*** The format of timers in `timer-list' and `timer-idle-list' is now
f938eda9
CY
1265[TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
1266The PSECS slot is new, and uses picosecond resolution. It can be
823b2fb6 1267accessed via the new `timer--psecs' accessor.
2f940384 1268
c4132fd4
PE
1269*** Last-modified time stamps in undo lists now are of the form
1270(t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
1271
0058cae2
GM
1272** EIEIO
1273
1274*** Improved security when handling persistent objects:
1275
1276**** `eieio-persistent-read' now features optional arguments for specifying
1277the class to load, as well as a flag stating whether subclasses are allowed;
1278if provided, other classes will be rejected by the reader. For
1279compatibility with existing code, if the class is omitted only a
1280warning is issued.
1281
1282**** New specialized reader for pulling in classes and signaling errors
1283without evaluation of suspicious code.
1284
1285**** All slots that contain objects must have a :type. Slots with lists
1286of objects must use a new type predicate for a list of an object type.
1287
1288*** Support for `find-function' and similar utilities, through the addition
1289of filename support to generated symbols.
1290
f938eda9 1291** Floating point functions now always return special values like NaN,
823b2fb6 1292instead of signaling errors, if given invalid args; e.g., (log -1.0).
f938eda9
CY
1293Previously, they returned NaNs on some platforms but signaled errors
1294on others. The affected functions are acos, asin, tan, exp, expt,
1295log, log10, sqrt, and mod.
1296
6bc66c10 1297** New fringe bitmap `exclamation-mark'.
f938eda9 1298
6bc66c10
GM
1299** Miscellaneous changes to special forms and macros
1300
1301*** `defun' and `defmacro' are now macros rather than special forms.
1302
1303*** `kbd' is now a function rather than a macro.
1304
1305** Miscellaneous new functions
1306
1307*** `set-temporary-overlay-map' sets up a temporary keymap that
1308takes precedence over most other maps for a short while (normally one key).
f938eda9 1309
847a0561 1310*** `autoloadp' tests if its argument is an autoloaded object.
2f940384 1311
847a0561 1312*** `autoload-do-load' performs the autoloading operation.
2f940384 1313
f938eda9 1314*** `buffer-narrowed-p' tests if the buffer is narrowed.
2f940384 1315
f938eda9 1316*** `file-name-base' returns a file name sans directory and extension.
2f940384 1317
f938eda9 1318*** `function-get' fetches a function property, following aliases.
c990426a 1319
f938eda9 1320*** `posnp' tests if an object is a `posn'.
f938eda9 1321
f938eda9 1322*** `system-users' returns the user names on the system.
547d6865 1323
f938eda9 1324*** `system-groups' returns the group names on the system.
f938eda9 1325
f938eda9 1326*** `tty-top-frame' returns the topmost frame of a text terminal.
c990426a 1327
f938eda9 1328** The following functions and variables are obsolete:
847a0561 1329*** `automount-dir-prefix' (use `directory-abbrev-alist')
f938eda9 1330*** `buffer-has-markers-at'
1a9c6830 1331*** `macro-declaration-function' (use `macro-declarations-alist')
847a0561 1332*** `window-system-version' (provides no useful information)
93cacb6d 1333*** `dired-pop-to-buffer' (use `dired-mark-pop-up')
0e2ae83d 1334*** `query-replace-interactive'
49238e7f 1335*** `font-list-limit' (has had no effect since Emacs < 23)
86aa551c 1336
adce950d 1337\f
93e0bed6 1338* Changes in Emacs 24.3 on Non-Free Operating Systems
9078ead6 1339
4e98ad15 1340** Cygwin builds can use the native MS Windows user interface.
823b2fb6 1341Pass `--with-w32' to configure. The default remains the X11 interface.
53a63be6 1342
1a9c6830 1343** Two new functions are available in Cygwin builds:
6e9f7997
DC
1344`cygwin-convert-file-name-from-windows' and
1345`cygwin-convert-file-name-to-windows'. These functions allow Lisp
1346code to access the Cygwin file-name mapping machinery to convert
1347between Cygwin and Windows-native file and directory names.
de6e3a60 1348
4e98ad15 1349** When invoked with the -nw switch to run on the Windows text-mode terminal,
1ab0c851 1350Emacs now supports `mouse-highlight', help-echo (in the echo area), and
4e98ad15
GM
1351`mouse-autoselect-window'.
1352
1a9c6830 1353** On MS Windows Vista and later Emacs now supports symbolic links.
4e98ad15 1354
823b2fb6 1355** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
4e98ad15
GM
1356support for libxml2, even if its presence is detected.
1357
4e98ad15
GM
1358** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
1359
823b2fb6 1360** On Mac OS X, configure no longer automatically adds the Fink "/sw"
4e98ad15
GM
1361directories to the search path. You must add them yourself if you want them.
1362
2a1e2476
GM
1363\f
1364* Changes in Emacs 24.2
1365
5190da91 1366** This is mainly a bug-fix release.
6dad7178 1367
9078ead6 1368\f
eb199145 1369* Installation Changes in Emacs 24.1
09e18d03 1370
31fd3586
GM
1371** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
1372to configure. Note that other libraries used by Emacs, RSVG and GConf,
1373also depend on Gtk+. You can disable them with --without-rsvg and
1374--without-gconf.
338648ad 1375
31fd3586
GM
1376** Emacs can be compiled with GnuTLS support.
1377This happens by default if a suitably recent version of the library is
1378found at build time. To prevent this, use the configure option
1379`--without-gnutls'. See below for GnuTLS features.
338648ad 1380
31fd3586
GM
1381** Emacs can be compiled with SELinux support.
1382This happens by default if a suitably recent version of the library is
1383found at build time. To prevent this, use the configure option
1384`--without-selinux'. See below for SELinux features.
aded53ff 1385
31fd3586
GM
1386** Emacs can be compiled with ImageMagick support.
1387This happens by default if a suitably recent version of the library is
1388found at build time. To prevent this, use the configure option
1389`--without-imagemagick'. See below for ImageMagick features.
c1f10868 1390This feature is not available for the Nextstep or MS ports.
d9170db5 1391
043efd56
GM
1392** Emacs can be compiled with libxml2 support.
1393This happens by default if a suitably recent version of the library is
1394found at build time. To prevent this, use the configure option
1395`--without-xml2'. See below for libxml2 features.
1396
7d301ae6
CY
1397** By default, the installed Info and man pages are compressed.
1398You can disable this by configuring --without-compress-info.
1399
7d301ae6 1400** New configure option --with-wide-int.
81eafe29 1401With it, Emacs integers typically have 62 bits, even on 32-bit machines.
0a768890
PE
1402On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
1403to about 2 GiB.
81eafe29 1404
7d301ae6 1405** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
31fd3586
GM
1406These provide no new functionality, they just remove the need to edit
1407lib-src/Makefile by hand in order to use the associated features.
1408
7d301ae6 1409** New configure option --enable-use-lisp-union-type.
31fd3586
GM
1410This is only useful for Emacs developers to debug certain types of bugs.
1411This is not a new feature; only the configure flag is new.
041d709f
CY
1412
1413** The standalone programs digest-doc and sorted-doc are removed.
1414Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
1415
041d709f
CY
1416** The standalone program `fakemail' is removed.
1417If you need it, feedmail.el provides a superset of the functionality.
1418
0bfd685e 1419\f
eb199145 1420* Startup Changes in Emacs 24.1
4a263588 1421
198a7a97 1422** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
adbf62ff
GM
1423command line arguments, and the EMACS_UNIBYTE environment variable, no
1424longer have any effect. (They were declared obsolete in Emacs 23.)
198a7a97 1425
66b7b0fe 1426** New command line option `--no-site-lisp' removes site-lisp directories
1b5e5b0c
GM
1427from load-path. -Q now implies this. This option does not affect the
1428EMACSLOADPATH environment variable (and hence has no effect for
c8d59ba3 1429Nextstep builds).
66b7b0fe 1430
0bfd685e 1431\f
eb199145 1432* Changes in Emacs 24.1
7841339b 1433
a2a25d24 1434** Completion
fdeb32ec 1435
dfdb4cad
CY
1436*** Many packages now use the `completion-at-point' command,
1437rather than implementing separate completion commands.
1438
de0bde62 1439*** `completion-at-point' now handles tags and semantic completion.
dfdb4cad 1440
a2a25d24
SM
1441*** Completion in a non-minibuffer now tries to detect the end of completion
1442and pops down the *Completions* buffer accordingly.
dfdb4cad
CY
1443
1444*** New option `completion-cycle-threshold' allows completion cycling.
1445
1446*** New option `completion-category-overrides' for overriding the
2c719188 1447default completion style in certain circumstances.
dfdb4cad 1448
a2a25d24 1449*** New completion style `substring'.
dfdb4cad
CY
1450
1451*** Completion of buffer names uses `substring' completion by default.
1452
1453*** The option `widget-complete-field' has been removed.
620c53a6 1454
6870aaef 1455** Mail changes
dfdb4cad 1456
7d301ae6
CY
1457*** The first time you try sending mail, Emacs asks for a mail method.
1458This is implemented by a new default for `send-mail-function', which
1459is `sendmail-query-once'. This offers to use the smtpmail package, or
1460to use the old defaults relying on external mail facilities
1461(`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
1462`mailclient-send-it' on Windows).
dfdb4cad 1463
e78e7e48
CY
1464*** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
1465transfers the report to your desktop's preferred mail client, if there
1466is one. This uses either the "xdg-email" utility, or Mac OS's "open"
1467command.
dfdb4cad 1468
7d301ae6
CY
1469*** See Changes in Specialized Modes and Packages for SMTPmail changes
1470and Mail mode changes
3f88cd72 1471
041d709f 1472** Emacs server and client changes
dfdb4cad 1473
7d301ae6 1474*** New option `server-port' specifies the port for TCP Emacs servers.
dfdb4cad 1475
041d709f 1476*** New emacsclient argument -q/--quiet suppresses some status messages.
dfdb4cad 1477
7d301ae6
CY
1478*** New emacsclient argument --frame-parameters specifies the frame
1479parameters of any newly-created graphical frame.
dfdb4cad
CY
1480
1481*** If emacsclient shuts down due to Emacs signaling an error,
1482its exit status is 1.
1483
041d709f
CY
1484*** New emacsclient argument --parent-id ID.
1485This opens a client frame in parent X window ID, via XEmbed, similar
1486to the --parent-id argument to Emacs.
1487
d0ce9f8c
MB
1488** Internationalization changes
1489
d0ce9f8c 1490*** Emacs now supports display and editing of bidirectional text.
7d301ae6
CY
1491Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
1492displayed in the correct visual order as expected by users of those
dfdb4cad
CY
1493scripts. The display reordering is a "full bidirectionality" class
1494implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
1495with no RTL text should look exactly the same as before.
f4b6ba46 1496
041d709f 1497**** New buffer-local variable `bidi-display-reordering'.
7d301ae6 1498To disable display reordering in a buffer, change this to nil.
d20e1419 1499
041d709f
CY
1500**** New buffer-local variable `bidi-paragraph-direction'.
1501If nil (the default), Emacs determines the base direction of each
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1502paragraph from its text, as specified by the UBA. Setting the value
1503to `right-to-left' or `left-to-right' forces a base direction on each
1504paragraph.
f4b6ba46 1505
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1506Paragraphs with right-to-left base direction are displayed starting at
1507the right window edge.
f1816485 1508
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1509*** Enhanced support for characters with no glyphs in available fonts,
1510or, on text terminals, characters that cannot be encoded by the
1511terminal coding system. The new option `glyphless-char-display-control'
1512specifies how to display them: as a hexadecimal code in a box, a thin
15131-pixel space, an empty box, etc.
d0ce9f8c 1514
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GM
1515*** New input methods for Farsi and Bulgarian
1516(farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
041d709f 1517
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CY
1518*** `nobreak-char-display' now also highlights Unicode hyphen chars
1519(U+2010 and U+2011).
1520
7d301ae6 1521*** New Hebrew translation of the Emacs Tutorial.
31fd3586
GM
1522Type `C-u C-h t' to choose it in case your language setup doesn't
1523automatically select it.
1524
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1525** An Emacs Lisp package manager is now included.
1526This is a convenient way to download and install additional packages,
1527from a package repository at http://elpa.gnu.org.
dfdb4cad 1528
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1529*** M-x list-packages shows a list of packages, which can be
1530selected for installation.
dfdb4cad 1531
7d301ae6 1532*** New command `describe-package', bound to `C-h P'.
dfdb4cad 1533
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1534*** By default, all installed packages are loaded automatically when
1535Emacs starts up. To disable this, set `package-enable-at-startup' to
1536nil. To specify the packages to load, customize `package-load-list'.
16a91140 1537
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1538** Custom theme changes
1539
7d301ae6
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1540*** New command `M-x customize-themes', which provides a convenient
1541interface for enabling and disabling Custom themes.
dfdb4cad 1542
7d301ae6 1543*** New option `custom-theme-load-path' is the load path for themes.
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1544Emacs no longer looks for Custom themes in `load-path'. The default
1545value of `custom-theme-load-path' says to look for themes in
1546`custom-theme-directory', followed by a subdirectory of
1547`data-directory' named "themes/", which contains a small selection of
1548built-in Custom themes.
1549
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1550*** New option `custom-safe-themes' records known-safe theme files.
1551If a theme is not in this list, Emacs queries before loading it, and
1552offers to save the theme to `custom-safe-themes' automatically. By
1553default, all themes included in Emacs are treated as safe.
b7d65a5f 1554
7d301ae6 1555** Improved GTK integration
dfdb4cad 1556
7d301ae6 1557*** GTK scroll-bars are now placed on the right by default.
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1558The function `set-scroll-bar-mode' can change this.
1559
7d301ae6 1560*** GTK tool bars can have just text, just images or images and text.
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1561Customize `tool-bar-style' to choose the style. On a Gnome desktop,
1562the default is taken from desktop settings.
1563
1564*** GTK tool bars can be placed on any edge of the frame.
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1565The frame-parameter tool-bar-position controls this. It takes the
1566values top, left, right or bottom. The Options => Show/Hide menu has
1567entries for this.
dfdb4cad 1568
7d301ae6
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1569*** The default colors for selected text (the `region' face) are taken
1570from the GTK theme when Emacs is built with GTK.
dfdb4cad 1571
7d301ae6
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1572*** Emacs uses GTK tooltips by default if built with GTK.
1573You can disable this by changing `x-gtk-use-system-tooltips' to nil.
a5bee597 1574
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1575** Graphical interface changes
1576
1577*** On graphical displays, the mode-line no longer ends in dashes.
1578Also, the first dash (which does not indicate anything) is just
1579displayed as a space.
1580
1581*** `menu-bar-select-buffer-function' lets you choose another operation
1582instead of `switch-to-buffer' when selecting an item in the Buffers menu.
1583
1584*** Lucid menus and dialogs can display antialiased fonts if Emacs is
1585built with Xft. These fonts can be set via X resources, for example:
1586Emacs.pane.menubar.font: Courier-12
1587
7d301ae6 1588** Exiting changes
dfdb4cad 1589
7d301ae6 1590*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
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1591or if it receives a SIGINT signal in batch mode.
1592
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1593*** `kill-emacs-hook' is now also run in batch mode.
1594Third-party code which adds to `kill-emacs-hook' should check if they
1595do the right thing in batch mode.
9c524fcb 1596
041d709f 1597** Scrolling changes
dfdb4cad 1598
041d709f 1599*** New scrolling commands `scroll-up-command' and `scroll-down-command'
0a19a6f8 1600(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
7d301ae6 1601of buffer at first key-press (instead they move to top/bottom of buffer)
550f41cd 1602when `scroll-error-top-bottom' is non-nil.
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1603
1604*** New option `scroll-error-top-bottom' (see above).
1605
041d709f 1606*** New scrolling commands `scroll-up-line' and `scroll-down-line'
5a97d2da 1607scroll a line instead of full screen.
dfdb4cad 1608
041d709f 1609*** New property `scroll-command' should be set on a command's symbol to
b2957ea8 1610define it as a scroll command affected by `scroll-preserve-screen-position'.
dfdb4cad 1611
041d709f 1612*** If you customize `scroll-conservatively' to a value greater than 100,
d0f69533
EZ
1613Emacs will never recenter point in the window when it scrolls due to
1614cursor motion commands or commands that move point (e.f., `M-g M-g').
1615Previously, you needed to use `most-positive-fixnum' as the value of
1616`scroll-conservatively' to achieve the same effect.
dfdb4cad 1617
7d301ae6 1618*** "Aggressive" scrolling now honors the scroll margins.
d0f69533
EZ
1619If you customize `scroll-up-aggressively' or
1620`scroll-down-aggressively' and move point off the window, Emacs now
1621scrolls the window so as to avoid positioning point inside the scroll
1622margin.
1623
7d301ae6
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1624** Basic SELinux support has been added.
1625This requires Emacs to be linked with libselinux at build time.
f1a5d776 1626
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1627*** Emacs preserves the SELinux file context when backing up.
1628Also, the function `copy-file' has an extra optional argument for
1629preserving SELinux context, and the return value of `backup-buffer'
1630now includes the SELinux context.
f0bf7c8e 1631
dfdb4cad 1632*** New functions `file-selinux-context' and `set-file-selinux-context'
7d301ae6 1633get and set the SELinux context of a file.
44198b6e 1634
7d301ae6 1635** Trash changes
dfdb4cad 1636
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1637*** `delete-by-moving-to-trash' now only affects commands that specify
1638trashing. This avoids inadvertently trashing temporary files.
dfdb4cad 1639
7d301ae6
CY
1640*** Calling `delete-file' or `delete-directory' with a prefix argument
1641now forces true deletion, regardless of `delete-by-moving-to-trash'.
278f6845 1642
041d709f 1643** File- and directory-local variable changes
dfdb4cad 1644
041d709f
CY
1645*** You can stop directory local vars from applying to subdirectories.
1646Add an element (subdirs . nil) to the alist portion of any variables
1647settings to indicate that the section should not apply to
1648subdirectories.
dfdb4cad 1649
041d709f
CY
1650*** Directory local variables can apply to some file-less buffers.
1651Affected modes include dired, vc-dir, and log-edit. For example,
1652adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
1653turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
1654`hack-dir-local-variables-non-file-buffer' to support this.
dfdb4cad 1655
041d709f
CY
1656*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
1657Instead, use "eval: (minor-mode 1)".
c136e5cd 1658
7b447e9b
GM
1659*** The variable `inhibit-first-line-modes-regexps' has been renamed
1660to `inhibit-local-variables-regexps'. As the name suggests, it now
dfdb4cad
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1661applies to ALL file local variables, not just -*- lines. The
1662associated `inhibit-first-line-modes-suffixes' has been renamed in the
1663corresponding way.
5d907d6c 1664
0a2132ba
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1665** Window changes
1666
91b65361
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1667*** The `quit-window' command now restores the last buffer displayed
1668in the quitted window.
1669
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1670*** Resizing an Emacs frame now preserves proportional window sizes,
1671modulo restrictions like window minimum sizes and fixed-size windows.
1672
1673*** The behavior of `display-buffer' is now customizable in detail.
dfdb4cad 1674
0a2132ba
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1675**** New option `display-buffer-base-action' specifies a list of
1676user-determined display "actions" (functions and optional arguments
1677for choosing the displaying window).
1678
1679This takes precedence over the default display action, which is
1680specified by `display-buffer-fallback-action'.
1681
1682**** New option `display-buffer-alist' maps buffer name regexps to
1683display actions, taking precedence over `display-buffer-base-action'.
1684
a0c2d0ae
MR
1685*** New option `window-combination-limit'.
1686The new option `window-combination-limit' allows to return the space
1687obtained for resizing or creating a window more reliably to the window
1688from which such space was obtained.
0a2132ba 1689
a0c2d0ae
MR
1690*** New option `window-combination-resize'.
1691The new option `window-combination-resize' allows to split a window that
1692otherwise cannot be split because it's too small by stealing space from
1693other windows in the same combination. Subsequent resizing or deletion
1694of the window will resize all windows in the same combination as well.
0a2132ba 1695
91b65361
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1696*** New option `frame-auto-hide-function' lets you choose between
1697iconifying or deleting a frame when burying a buffer in a dedicated
1698frame, or quitting a window showing a buffer in a frame of its own.
1699
0a2132ba 1700*** New commands `maximize-window' and `minimize-window'.
53964682 1701These maximize and minimize the size of a window within its frame.
0a2132ba 1702
0a2132ba
CY
1703*** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
1704These functions allow to navigate through the live buffers that have
1705been shown in a specific window.
1706
7d301ae6 1707** Minibuffer changes
dfdb4cad 1708
7d301ae6 1709*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
104dc9c6
GM
1710This is handy for minibuffer-only frames, and is also used for the feature
1711where mouse-1 pops up *Messages*"', which can now easily be changed.
041d709f 1712
7d301ae6 1713*** Minibuffers set `truncate-lines' to nil.
f66eca26 1714If you want to change the value to something else, you could use
7d301ae6
CY
1715for example `minibuffer-setup-hook'.
1716
7d301ae6
CY
1717** `auto-mode-case-fold' is now enabled by default.
1718
7d301ae6 1719** `backup-by-copying-when-mismatch' now defaults to t.
f66eca26 1720
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1721** New basic faces `error', `warning', `success'.
1722These are used to highlight text indicating failure, caution or
1723successful operation.
1724
1725** New option `list-colors-sort' defines the color sort order
1726for `list-colors-display'.
1727
1728** The variable `focus-follows-mouse' now always defaults to nil.
1729
0bfd685e 1730\f
eb199145 1731* Editing Changes in Emacs 24.1
b350bdf2 1732
892777ba 1733** Search changes
dfdb4cad
CY
1734
1735*** C-y in Isearch is now bound to `isearch-yank-kill', instead of
1736`isearch-yank-line'.
1737
1738*** M-y in Isearch is now bound to `isearch-yank-pop', instead of
1739`isearch-yank-kill'.
1740
1741*** M-s C-e in Isearch is now bound to `isearch-yank-line'.
1742
b2b0776e 1743** New commands `count-words-region' and `count-words'.
dfdb4cad 1744
10607bea
CY
1745*** M-= is bound to `count-words-region', not `count-lines-region'.
1746The `count-words-region' command, when called interactively, reports
1747the number of lines, words, and characters in the region. It is a
1748superset of the old `count-lines-region', which is now an obsolete
1749alias for it.
ea4f7750 1750
ec9da840 1751** The command `just-one-space' (M-SPC), if given a negative argument,
1c708c1a
CY
1752also deletes newlines around point.
1753
b9229673 1754** Deletion changes
dfdb4cad 1755
b9229673 1756*** New option `delete-active-region'.
ddb54206 1757If non-nil, [delete] and DEL delete the region if it is active and no
dfdb4cad 1758prefix argument is given. If set to `kill', those commands kill
ddb54206 1759instead.
dfdb4cad 1760
59ee0542 1761*** New command `delete-forward-char', bound to [delete].
42d9cffa
CY
1762This is meant for interactive use, and obeys `delete-active-region'.
1763The command `delete-char' does not obey `delete-active-region'.
dfdb4cad 1764
b9229673
CY
1765*** `delete-backward-char' is now a Lisp function.
1766Apart from obeying `delete-active-region', its behavior is unchanged.
7d301ae6
CY
1767However, the byte compiler now warns if it is called from Lisp; Lisp
1768callers should use delete-char with a negative argument instead.
dfdb4cad 1769
b9229673
CY
1770*** The option `mouse-region-delete-keys' has been deleted.
1771
f9d71b42
CY
1772** Selection changes.
1773
7d301ae6
CY
1774The default handling of clipboard and primary selections has been
1775changed to conform with modern X applications. In short, most
1776commands for killing and yanking text now use the clipboard, while
1777mouse commands use the primary selection.
b1ab31ae
CY
1778
1779In the following, we provide a list of these changes, followed by a
1780list of steps to get the old behavior back if you prefer that.
1781
b1ab31ae
CY
1782*** `select-active-regions' now defaults to t.
1783Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
963578d3 1784the kill ring. The selected text is put in the primary selection, if
b1ab31ae
CY
1785the system possesses a separate primary selection facility (e.g. X).
1786
1787**** `select-active-regions' also accepts a new value, `only'.
1788This means to only set the primary selection for temporarily active
1789regions (usually made by mouse-dragging or shift-selection);
1790"ordinary" active regions, such as those made with C-SPC followed by
1791point motion, do not alter the primary selection.
1792
963578d3
CY
1793**** `mouse-drag-copy-region' now defaults to nil.
1794
b1ab31ae
CY
1795*** mouse-2 is now bound to `mouse-yank-primary'.
1796This pastes from the primary selection, ignoring the kill-ring.
1797Previously, mouse-2 was bound to `mouse-yank-at-click'.
dfdb4cad 1798
b1ab31ae 1799*** `x-select-enable-clipboard' now defaults to t on all platforms.
dfdb4cad 1800
b1ab31ae
CY
1801*** `x-select-enable-primary' now defaults to nil.
1802Thus, commands that kill text or copy it to the kill-ring (such as
1803M-w, C-w, and C-k) also use the clipboard---not the primary selection.
1804
1805**** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
dfdb4cad 1806exactly equivalent to M-w, C-w, and C-y respectively.
b1ab31ae
CY
1807
1808**** Note that on MS-Windows, `x-select-enable-clipboard' was already
1809non-nil by default, as Windows does not support the primary selection
1810between applications.
1811
1812*** To return to the previous behavior, do the following:
dfdb4cad 1813
104c2fe9 1814**** Change `select-active-regions' to nil.
b1ab31ae
CY
1815**** Change `mouse-drag-copy-region' to t.
1816**** Change `x-select-enable-primary' to t (on X only).
1817**** Change `x-select-enable-clipboard' to nil.
1818**** Bind `mouse-yank-at-click' to mouse-2.
f9d71b42 1819
084e6df3 1820*** Support for X cut buffers has been removed.
dfdb4cad 1821
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CY
1822*** X clipboard managers are now supported.
1823To inhibit this, change `x-select-enable-clipboard-manager' to nil.
4b80f674 1824
dfdb4cad
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1825** New command `C-x r N' (`rectangle-number-lines') numbers the lines
1826in the current rectangle. With a prefix argument, this prompts for a
1827number to count from and for a format string.
99f053cf 1828
7d301ae6 1829** `redisplay-dont-pause' now defaults to t.
6bf7006f
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1830This makes Emacs feel more responsive to editing commands that arrive
1831at high rate, e.g. if you lean on some key, because stopping redisplay
1832in the middle (when this variable is nil) forces more expensive
1833updates later on, and Emacs appears to be unable to keep up.
1834
e70b5064
CY
1835** The behavior of <TAB> for active regions in Text mode has changed.
1836In Text and related modes, typing <TAB> (`indent-for-tab-command')
1837when the region is active causes Emacs to indent all the lines in the
1838region, aligning them with the line previous to the first line in the
1839region (or with the left margin if there is no previous line).
1840
dfdb4cad
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1841** When `occur' is called with a prefix argument, matching strings are
1842collected into the `*Occur*' buffer without line numbers. If there
1843are parenthesized subexpressions in the specified regexp, `occur'
1844reads replacement text that may contain \\& and \\N whose convention
1845follows `replace-match'.
1846
9bae34bf 1847\f
eb199145 1848* Changes in Specialized Modes and Packages in Emacs 24.1
efeb796b 1849
041d709f 1850** Archive Mode has basic support for browsing and updating 7z archives.
d76674bb 1851
b7c3692a 1852** BibTeX mode
dfdb4cad 1853
2de69e00 1854*** BibTeX mode now supports biblatex.
7d301ae6
CY
1855Use the variable `bibtex-dialect' to select different BibTeX dialects.
1856`bibtex-entry-field-alist' is now an obsolete alias for
1857`bibtex-BibTeX-entry-alist'.
1858
dfdb4cad
CY
1859*** New command `bibtex-search-entries', bound to C-c C-a.
1860
b7c3692a 1861*** New `bibtex-entry-format' option `sort-fields', disabled by default.
dfdb4cad 1862
022fe7ce
RW
1863*** New variable `bibtex-search-entry-globally'.
1864
7d301ae6 1865** Browse-url
dfdb4cad 1866
7d301ae6 1867*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
dfdb4cad 1868
7d301ae6
CY
1869*** The default browser used by the package is now the "xdg-open" program,
1870on platforms that support it. This calls your desktop's preferred browser.
1871
86e100a6
GM
1872** Calc
1873
1874*** Support for musical notes.
1875
1876*** Support for logarithmic units.
1877
1878*** No longer uses the tex prefix for TeX specific unit names when
1879using TeX or LaTeX mode.
1880
1881*** New option to highlight selections using faces.
1882
1883*** `calc-histogram' has the option of using a vector to determine the bins.
1884
1885*** New "O" option prefix.
1886
1887*** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
1888
cf16af42
GM
1889** Calendar, Diary, and Appt
1890
7d301ae6 1891*** Diary entries can contain non-printing "comments".
548d0a63
GM
1892See the variable `diary-comment-start'.
1893
5006e634
GM
1894*** Appointments can specify their individual warning times.
1895See the variable `appt-warning-time-regexp'.
1896
0a2bb1a9
GM
1897*** The function specified by `appt-disp-window-function' may be passed
1898lists of arguments if multiple appointments are due at similar times.
1899If you are using a custom function for this, you should update it.
1900
7454f200
GM
1901*** New function `diary-hebrew-birthday'.
1902
e565dd37
GM
1903*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
1904may no longer be nil, but must all be strings.
1905
7d301ae6
CY
1906*** The obsolete (since Emacs 22.1) method of enabling the appt
1907package by adding `appt-make-list' to `diary-hook' has been removed.
1908Use `appt-activate' instead.
cf16af42 1909
cf16af42
GM
1910*** Some appt variables (obsolete since Emacs 22.1) have been removed:
1911appt-issue-message (use the function appt-activate)
1912appt-visible/appt-msg-window (use the variable appt-display-format)
1913
cf16af42
GM
1914*** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
1915view-diary-entries, list-diary-entries, show-all-diary-entries
1916
551b046f 1917** CC Mode
dfdb4cad 1918
551b046f 1919*** New feature to "guess" the style in an existing buffer.
7d301ae6 1920The main entry point is M-x c-guess.
041d709f 1921
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AM
1922*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
1923
dfdb4cad 1924*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
551b046f
AM
1925Thus C-M-a will, by default, go to the beginning of the immediate function,
1926not the top level.
1927
dfdb4cad 1928*** "Macros with semicolons" can be registered for correct indentation.
551b046f
AM
1929Where such a macro ends a line (no semicolon) the next statement is no longer
1930parsed as a statement continuation.
1931
dfdb4cad 1932** Comint and modes derived from it use the standard completion code.
041d709f
CY
1933
1934** Compilation mode
dfdb4cad 1935
7d301ae6 1936*** Compilation mode can be used without Font Lock mode.
041d709f
CY
1937`compilation-parse-errors-function' is now obsolete.
1938
dfdb4cad 1939*** New variable `compilation-filter-start', which is bound while
7d301ae6
CY
1940`compilation-filter-hook' runs. It records the start position of the
1941text inserted by `compilation-filter'.
041d709f 1942
47a6a35f
GM
1943*** `compilation-error-screen-columns' and `compilation-first-column'
1944are obeyed in the editing buffer. So programming language modes can
7d301ae6
CY
1945set them, whereas previously only the value in the *Compilation*
1946buffer was used.
1dce7193 1947
52834b6b
CY
1948** Customize
1949
1950*** Customize buffers now contain a search field.
1951The search is performed using `customize-apropos'.
7d301ae6 1952To turn off the search field, set `custom-search-field' to nil.
52834b6b 1953
8d5dd370 1954*** Options in customize group buffers start out hidden if not customized.
52834b6b
CY
1955Use the arrow to the left of the option name to toggle visibility.
1956
1957*** custom-buffer-sort-alphabetically now defaults to t.
1958
1959*** The color widget now has a "Choose" button, which allows you to
7d301ae6 1960choose a color via `list-colors-display'.
52834b6b 1961
041d709f
CY
1962** D-Bus
1963
5da3be7f
GM
1964*** It is now possible to access buses other than the default system
1965or session bus.
041d709f 1966
7d301ae6 1967*** The `dbus-register-method' and `dbus-register-property' functions
5da3be7f 1968optionally do not register names.
041d709f 1969
7d301ae6 1970*** The new function `dbus-register-service' registers a known service
dfdb4cad 1971name on a D-Bus without also registering a property or a method.
041d709f 1972
f5d6548a 1973** Dired-x
425a25f1 1974
7d301ae6
CY
1975*** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
1976if called with a prefix argument, read a file name from the minibuffer
1977instead of using the current buffer.
f5d6548a 1978
7d301ae6 1979*** The "dired local variables" feature of Dired-x is obsolete.
817b48a7 1980The standard directory local variables feature replaces it.
8117868f 1981
041d709f 1982** ERC changes
7492acc9 1983
c4077254
GM
1984*** New options `erc-autojoin-timing' and `erc-autojoin-delay',
1985controlling attempts to autojoin a channel.
041d709f
CY
1986
1987*** New variable `erc-coding-system-precedence': If we use `undecided'
1988as the server coding system, this variable will then be consulted.
1989The default is to decode strings that can be decoded as utf-8 as
1990utf-8, and do the normal `undecided' decoding for the rest.
7492acc9 1991
041d709f 1992** Eshell changes
7492acc9 1993
05f77e38
GM
1994*** The default value of `eshell-directory-name' has changed
1995to be an "eshell" directory in `user-emacs-directory'.
1996The old "~/.eshell/" directory is still used if it exists, though.
041d709f
CY
1997
1998** gdb-mi
dfdb4cad
CY
1999
2000*** The M-x gdb command now uses the GDB Machine Interface protocol.
05f77e38
GM
2001It now supports multithread non-stop debugging and simultaneous
2002debugging of several threads.
7492acc9 2003
18af70d0
CY
2004** Image mode
2005
05f77e38
GM
2006*** RET (`image-toggle-animation') toggles animation, if applicable.
2007Animation plays once, unless the option `image-animate-loop' is non-nil.
18af70d0 2008
041d709f 2009** Info
723ee192 2010
7d301ae6 2011*** New command M-x info-display-manual displays a named Info manual.
2ebc3b94
GM
2012If that manual is already visited in some Info buffer, it displays
2013that buffer. (This is handy if you have many manuals in many *info*
2014buffers, and don't remember the name of the buffer visiting the manual
2015you want to consult.) Otherwise, it loads and displays the manual.
691cf4a0 2016
24ea72d3
EZ
2017*** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2018This is for compatibility with the stand-alone Info reader program,
2019and also because `Info-edit' is a rarely used command that is disabled
2020by default.
2021
7d301ae6 2022** Mail mode changes (not Message mode)
dfdb4cad 2023
7d301ae6 2024*** New command M-x mail-add-attachment for adding MIME attachments
7d301ae6 2025
dfdb4cad
CY
2026*** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
2027(Its name is misleading, since it has nothing to do with MIME
2028attachments.) The old name is now an obsolete alias to the new name.
2029
f2c3a9eb 2030** MH-E has been updated to MH-E version 8.3.1.
041d709f 2031See MH-E-NEWS for details.
37221432 2032
041d709f 2033** Modula-2 mode provides auto-indentation.
37221432 2034
041d709f 2035** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3c3d4f5b 2036
5d1ac394 2037** nXML mode no longer binds C-RET to `nxml-complete'.
dfdb4cad
CY
2038Completion is now performed via `completion-at-point', bound to C-M-i
2039or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
2040default), this performs tag completion.
5d1ac394 2041
f2c3a9eb
CY
2042** Org mode has been updated to version 7.8.09.
2043See ORG-NEWS for details.
2044
041d709f 2045** Prolog mode has been completely revamped, with lots of additional
7d301ae6
CY
2046functionality such as more intelligent indentation, electricity,
2047support for more variants, including Mercury, and a lot more.
041d709f
CY
2048
2049** Rmail
2050
2051*** The command `rmail-epa-decrypt' decrypts OpenPGP data
2052in the Rmail incoming message.
2053
50419064
GM
2054*** The variable `rmail-message-filter' no longer has any effect.
2055This change was made in Emacs 23.1 but was not advertised at the time.
2056Try using `rmail-show-message-hook' instead.
2057
717a1362 2058** Shell mode
dfdb4cad
CY
2059
2060*** M-x shell prompts for the shell path name if the default directory
2061is a remote file name and neither the environment variable $ESHELL nor
2062the variable `explicit-shell-file-name' is set.
2063
2064*** TAB is now bound to the standard `completion-at-point' command,
2065which now implements the pcomplete rules for shell command completion.
717a1362 2066
7d301ae6
CY
2067** SMTPmail
2068
dfdb4cad 2069*** SMTPmail now uses encrypted connections (via STARTTLS) by default
7d301ae6
CY
2070if the mail server supports them. This uses either built-in GnuTLS
2071support, or the starttls.el library. Customize `smtpmail-stream-type'
2072to change this.
2073
7d301ae6
CY
2074*** The variable `smtpmail-auth-credentials' has been removed.
2075By default, the information is now stored in the file ~/.authinfo.
dfdb4cad
CY
2076This was the default value of smtpmail-auth-credentials. If you had
2077customized smtpmail-auth-credentials to a list of user names and
2078passwords, those settings are not used. During your first connection
2079to the smtp server, Emacs will prompt for the user name and password,
2080and offer to save them to ~/.authinfo. Or you can manually copy the
2081credentials to ~/.authinfo. For example, if you had
7d301ae6
CY
2082
2083 (setq smtpmail-auth-credentials
2084 '(("mail.example.org" 25 "jim" "s!cret")))
2085
2086then the equivalent line in ~/.authinfo would be
2087
2088 machine mail.example.org port 25 login jim password s!cret
2089
2090See the auth-source manual for more information, e.g. on encrypting
2091the credentials file.
2092
7d301ae6 2093*** The variable `smtpmail-starttls-credentials' has been removed.
dfdb4cad 2094If you had that set, you need to put
7d301ae6
CY
2095
2096 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
2097
2098in your ~/.authinfo file instead.
2099
8ce192e3
LI
2100*** SMTPmail defaults to using the address in the From: header as the
2101SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
2102to the address you wish to use instead.
2103
34e8a2da 2104** SQL mode
041d709f 2105
34e8a2da
GM
2106*** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
2107and `sql-oracle-scan-on'.
041d709f 2108
dfdb4cad 2109*** New options controlling prompting for login parameters.
34e8a2da
GM
2110Each supported product has a custom variable `sql-*-login-params',
2111which is a list of the parameters to be prompted for before a
2112connection is established.
041d709f
CY
2113
2114*** The command `sql-product-interactive' now takes a prefix argument,
34e8a2da 2115which causes it to prompt for an SQL product.
041d709f 2116
34e8a2da 2117*** Product-specific SQL interactive commands now take prefix arguments.
041d709f
CY
2118These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
2119given a prefix argument, prompt for a name for the SQL interactive
2120buffer. This reduces the need for calling `sql-rename-buffer'.
2121
2122*** SQL interactive modes suppress command continuation prompts, and
2123replace tabs with spaces. The first change impacts multiple line SQL
2124statements entered with C-j between each line, statements yanked into
2125the buffer and statements sent with `sql-send-*' functions. The
34e8a2da
GM
2126second prevents the MySQL and Postgres interpreters from listing
2127object name completions when sent text via `sql-send-*' functions.
041d709f
CY
2128
2129*** New command `sql-connect' starts a predefined SQLi session,
2130using the login parameters from `sql-connection-alist'.
2131
2132*** New "Save Connection" menu item in SQLi buffers.
2133This gathers the login params specified for the SQLi session, if it
2134was not started by a connection, and saves them as a new connection.
2135
34e8a2da
GM
2136*** New commands for listing database objects and details:
2137sql-list-all and sql-list-table.
041d709f
CY
2138
2139*** An API for manipulating SQL product definitions has been added.
2140
2141** TeX modes
2142
2143*** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
412b9ee5 2144
459bba37 2145** Tramp
dfdb4cad 2146
7d301ae6 2147*** New inline access method "ksu" (kerberized su).
dfdb4cad 2148
459bba37 2149*** The following access methods are discontinued: "ssh1_old",
ea843702 2150"ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
dfdb4cad 2151
b011fbfe
GM
2152*** The user option `remote-file-name-inhibit-cache' controls whether
2153remote file attributes are cached for better performance.
dfdb4cad 2154
58f74fe4
MA
2155*** The option `ange-ftp-binary-file-name-regexp' has changed its
2156default value to "".
dfdb4cad 2157
7d301ae6
CY
2158*** Handlers for `file-selinux-context' and `set-file-selinux-context'
2159for remote machines which support SELinux.
58f74fe4 2160
dfdb4cad 2161** New function `url-queue-retrieve', which behaves like url-retrieve,
a48ec60c
GM
2162but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
2163the degree of parallelism.
177549d0 2164
0c32ce32
CY
2165** VC and related modes
2166
2167*** Support for pulling on distributed version control systems.
7d301ae6
CY
2168The command C-x v + (`vc-pull') runs a "pull" operation, if it is
2169supported (currently with Bzr, Git, and Mercurial), to update the
2170current branch and working tree. A prefix argument means to prompt
2171the user for specifics, e.g. a pull location.
0c32ce32 2172
dab3703d 2173*** `vc-update' is now an alias for `vc-pull'.
0c32ce32
CY
2174
2175*** Support for merging on distributed version control systems.
7d301ae6
CY
2176The command C-x v m (`vc-merge') now runs a "merge" operation, if it
2177is supported (currently with Bzr, Git, and Mercurial), to merge
2178changes from another branch into the current one. It prompts for
2179specifics, e.g. a merge source.
0c32ce32 2180
2afef60a 2181*** New option `vc-revert-show-diff' controls whether `vc-revert'
bbe43420 2182shows a diff while querying the user. It defaults to t.
2afef60a 2183
d4eb88c7
CY
2184*** Log entries in some Log View buffers can be toggled to display a
2185longer description by typing RET (log-view-toggle-entry-display).
dab3703d
GM
2186This is currently supported for Bzr, Git, and Mercurial (to support
2187another backend, define a `log-view-expanded-log-entry-function').
7d301ae6 2188In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
d4eb88c7
CY
2189use this to display the full log entry for the revision at point.
2190
1c6c854e
CS
2191*** New command `vc-ediff' allows visual comparison of two revisions
2192of a file similar to `vc-diff', but using ediff backend.
2193
86c60681
CY
2194*** The option `vc-initial-comment' was removed in Emacs 23.2, but
2195this was not advertised at the time.
2196
86c60681
CY
2197*** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
2198Since Emacs 23, it has done the same thing as `toggle-read-only', but
80c6d77f
GM
2199this was not advertised at the time.
2200
041d709f
CY
2201** Obsolete modes
2202
23d70505
GM
2203*** abbrevlist.el
2204
f8ca9162 2205*** erc-hecomplete.el (use erc-pcomplete.el instead)
23d70505
GM
2206
2207*** partial-completion-mode (complete.el) is obsolete.
041d709f
CY
2208You can get a comparable behavior with:
2209(setq completion-styles '(partial-completion initials))
2210(setq completion-pcm-complete-word-inserts-delimiters t)
2211
23d70505
GM
2212*** pc-mode.el is obsolete (CUA mode is much more comprehensive).
2213
2c719188 2214*** pgg is obsolete (use EasyPG instead).
041d709f
CY
2215
2216*** sregex.el is obsolete, since rx.el is a strict superset.
2217
23d70505
GM
2218*** s-region.el and pc-select.el are obsolete.
2219They are superseded by shift-select-mode, enabled by default since 23.1.
2220
2c719188 2221*** vc-mcvs.el is obsolete (for lack of a maintainer).
ca5eed61 2222
0fe719e6
GM
2223** Miscellaneous
2224
05f77e38 2225*** The Landmark game is now invoked with `landmark', not `lm'.
c6ad2a4e 2226Its functions and variables have been similarly renamed.
05f77e38 2227
dfdb4cad 2228*** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
05f77e38
GM
2229(This interfered with cua-mode.)
2230
9f678528
GM
2231*** f90.el has some support for Fortran 2008 syntax.
2232
0fe719e6
GM
2233*** `copyright-fix-years' can optionally convert consecutive years to ranges.
2234
5b3e6db8
GM
2235*** New command `nato-region' converts text to NATO phonetic alphabet.
2236
eb199145
GM
2237\f
2238* New Modes and Packages in Emacs 24.1
d445b3f8 2239
60e56523 2240** Occur Edit mode applies edits made in *Occur* buffers to the
8c0f49f0 2241original buffers. It is bound to "e" in Occur mode.
60e56523 2242
a075a2c5
GM
2243** New global minor mode electric-pair-mode.
2244When enabled, typing an open parenthesis automatically inserts the
2245matching closing one.
2246
2247** New global minor mode electric-indent-mode.
2248When enabled, typing certain characters triggers reindentation.
cd3308f3
GM
2249Major modes wishing to use this can set electric-indent-chars or
2250electric-indent-functions.
a075a2c5
GM
2251
2252** New global minor mode electric-layout-mode.
2253When enabled, typing certain characters automatically inserts newlines.
cd3308f3 2254Major modes wishing to use this can set electric-layout-rules.
3b843809 2255
a83ec3c9
CY
2256** tabulated-list.el provides a generic major mode for tabulated data,
2257from which other modes can be derived.
2258
d02c9bcd
SM
2259** pcase.el provides the ML-style pattern matching macro `pcase'.
2260
7725ebb7
MA
2261** secrets.el is an implementation of the Secret Service API, an
2262interface to password managers like GNOME Keyring or KDE Wallet. The
065f2743
MA
2263Secret Service API requires D-Bus for communication. The command
2264`secrets-show-secrets' offers a buffer with a visualization of the
2265secrets.
7725ebb7 2266
f9e78150
MA
2267** notifications.el provides an implementation of the Desktop
2268Notifications API. It requires D-Bus for communication.
2269
12fe5bcc
MA
2270** soap-client.el supports access to SOAP web services from Emacs.
2271soap-inspect.el is an interactive inspector for SOAP WSDL structures.
2272
ff1796f3 2273** New generic mode, xmodmap-generic-mode, for xmodmap files.
ad7d6ecb 2274
53bbe3ad 2275** New emacs-lock.el package.
7d301ae6
CY
2276The previous version has been moved to obsolete/old-emacs-lock.el.
2277Now, there is a proper minor mode `emacs-lock-mode'. Protection
2278against exiting Emacs and killing the buffer can be set separately.
2279The mechanism for automatically turning off protection for buffers
2280with dead inferior processes has been generalized.
53bbe3ad 2281
eb199145
GM
2282\f
2283* Incompatible Lisp Changes in Emacs 24.1
6dfcbe31 2284
7d301ae6
CY
2285** Passing a nil argument to a minor mode function call now ENABLES
2286the minor mode unconditionally. This is so that you can write e.g.
2287
dfdb4cad 2288 (add-hook 'text-mode-hook 'foo-mode)
7d301ae6 2289
dfdb4cad
CY
2290to enable foo-mode in Text mode buffers, removing the need for
2291`turn-on-foo-mode' style functions. This affects all mode commands
2292defined by `define-minor-mode'. If called interactively, the mode
2293command still toggles the minor mode.
7d301ae6 2294
d268b4fe
CY
2295** The return value of `backup-buffer' has changed.
2296It is now a list of three elements, where the second element is a list
2297describing the original file's SELinux context. If Emacs or the
f003f294 2298system lacks SELinux support, the context list is (nil nil nil nil).
7d301ae6 2299See "Basic SELinux support" above, under "Changes in Emacs 24.1".
d268b4fe 2300
dfdb4cad
CY
2301** `char-direction-table' and the `char-direction' function were deleted.
2302They were buggy and inferior to the new support of bidirectional
2303editing introduced in Emacs 24. If you need the bidirectional
2304properties of a character, use `get-char-code-property' with the last
2305argument `bidi-class'.
fa6996bc 2306
470d996d
TV
2307** `copy-directory' now copies the source directory as a subdirectory
2308of the target directory, if the latter is an existing directory. The
2309new optional arg COPY-CONTENTS, if non-nil, makes the function copy
2310the contents directly into a pre-existing target directory.
2311
9173a8fb
CY
2312** For mouse click input events in the text area, the Y pixel
2313coordinate in the POSITION list now counts from the top of the text
2314area, excluding any header line. Previously, it counted from the top
2315of the header line.
2316
7d301ae6
CY
2317** Support for "old-style" backquotes, obsolete for 10+ years, has
2318been further reduced. Now a backquote not followed by a space is
2319always treated as a "new-style" backquote. Please remove all
2320"old-style" backquotes from your code. If your code uses backquotes
2321as documented in the Elisp manual, and compiles without warning, then
2322you have nothing to do in this regard. Code not following the
2323appropriate conventions may fail to compile.
50ab02c5
CY
2324
2325The most common cause of trouble seems to be an old-style backquote
2326followed by a newline. Another cause of trouble is vector notation
2327for key sequence notation: instead of [(control ,)] and [(control ')],
2328you should write [(control ?,)] and [(control ?')], which will work in
7d301ae6 2329older Emacsen too.
288cf4e9 2330
520f2425
GM
2331** The macro `eval-at-startup' was removed in Emacs 23.2, but this
2332was not advertised at the time. The function `custom-initialize-delay'
2333replaced all known uses.
2334
7d301ae6
CY
2335** `view-buffer' now treats special mode-class in the same way that
2336`view-file' has since Emacs 22 (i.e. it won't enable View mode if the
2337major mode is special).
fd5c9dfa 2338
7d301ae6 2339** Menu and tool bar changes
6431f2e6 2340
7d301ae6 2341*** During startup, Emacs no longer adds entries for `menu-bar-lines'
0a19a6f8
JB
2342and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
2343With these alist entries omitted, `make-frame' checks the value of the
2344variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
2345a menu-bar or tool-bar, respectively. If the alist entries are added,
2346they override the value of `menu-bar-mode'/`tool-bar-mode'.
6431f2e6 2347
7d301ae6
CY
2348*** The menu bar bindings's caches are not used any more.
2349Use (where-is-internal <def> nil t) instead.
2350
fe0aa820 2351** Regions created by mouse dragging are now normal active regions,
dfdb4cad 2352similar to those created by shift-selection (see Selection changes
7d301ae6
CY
2353above). In previous Emacs versions, these regions were delineated by
2354`mouse-drag-overlay'; that variable has been removed.
d6d8ee7a 2355
7d301ae6
CY
2356** The fourth argument of `filter-buffer-substring' has been removed.
2357If you want to remove text properties from the final result, simply
2358pass the result through substring-no-properties.
34c99998 2359
4583e796
GM
2360** cl.el no longer provides `cl-19'.
2361
7d301ae6
CY
2362** The following obsolete functions and aliases have been removed
2363(the appropriate new function is given in parentheses; "not needed"
2364means you can just remove all calls to the function in question):
2365
2366*** `comint-kill-output' (`comint-delete-output')
2367*** `decompose-composite-char' (`char-to-string')
2368*** `outline-visible' (`outline-invisible-p')
2369*** `internal-find-face' (`facep')
2370*** `internal-get-face' (`facep and check-face')
2371*** `frame-update-faces' (not needed)
2372*** `frame-update-face-colors' (`frame-set-background-mode')
2373*** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
2c719188 2374*** `x-make-font-bold and x-make-font-demibold (`make-face-bold')
7d301ae6
CY
2375*** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
2376*** `x-make-font-bold-italic' (`make-face-bold-italic')
2377*** `x-make-font-unbold' (`make-face-unbold')
2378*** `x-make-font-unitalic' (`make-face-unitalic')
2379*** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
2380*** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
2381*** `iswitchb-default-keybindings' (`iswitchb-mode')
2382*** `char-bytes' (== 1)
2383*** `isearch-return-char' (`isearch-printing-char')
2384*** `make-local-hook' (not needed)
2385*** `set-screen-height' (`set-frame-height')
2386*** `set-screen-width' (`set-frame-width')
2387
7d301ae6
CY
2388** The following obsolete variables and varaliases have been removed
2389(the appropriate new variable is given in parentheses):
2390
2391*** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
2392*** `vc-header-alist' (`vc-BACKEND-header')
2393*** `directory-sep-char' (== ?/)
2394*** `font-lock-defaults-alist' (`font-lock-defaults')
2395*** `e' (`float-e').
3226d6ca 2396
041d709f 2397** The following obsolete files were removed:
7b0e3048
GM
2398sc.el, x-menu.el, rnews.el, rnewspost.el
2399
7d301ae6
CY
2400** The format of the finder-inf.el file has changed, since the Finder
2401mechanism is now based on the package system. The variable
2402`finder-package-info' is replaced by `package--builtins' and
2403`finder-keywords-hash'.
33658d4e 2404
c2c79260
DE
2405** When generating autoloads, `update-directory-autoloads' no longer
2406assumes every inspected file is in your `load-path'. It instead
2407generates relative names according to the current `load-path'.
2408
eb199145 2409\f
93e0bed6 2410* Lisp Changes in Emacs 24.1
9097e8af 2411
041d709f 2412** Code can now use lexical scoping by default instead of dynamic scoping.
dfdb4cad 2413The `lexical-binding' variable enables lexical scoping for local
48da7392 2414variables. It is typically set via a file-local variable in the first
dfdb4cad
CY
2415line of the file, in which case it applies to all the code in that
2416file.
2417
041d709f
CY
2418*** `eval' takes a new optional argument `lexical' to choose the new lexical
2419binding instead of the old dynamic binding mode.
dfdb4cad 2420
041d709f
CY
2421*** Lexically scoped interpreted functions are represented with a new form
2422of function value which looks like (closure ENV ARGS &rest BODY).
2423
2424*** New macro `letrec' to define recursive local functions.
dfdb4cad
CY
2425
2426*** `defvar' and `defconst' now mark the variable as special (dynamic).
2427So do `defcustom' and other forms that call `defvar' as a subroutine.
2428
041d709f
CY
2429*** New function `special-variable-p' to check whether a variable is
2430declared as dynamically bound.
2431
88ed9e87
SM
2432*** The form ((lambda ...) ...) is deprecated.
2433
041d709f
CY
2434** An Emacs Lisp testing tool is now included.
2435Emacs Lisp developers can use this tool to write automated tests for
2436their code. See the ERT info manual for details.
2437
2438** Changes for bidirectional display and editing
f1816485 2439
041d709f 2440*** New function `current-bidi-paragraph-direction'.
7d301ae6 2441This returns the base direction of the paragraph at point.
041d709f 2442
041d709f 2443*** New function `bidi-string-mark-left-to-right'.
dfdb4cad
CY
2444Given a string containing characters from right-to-left scripts, this
2445function returns another string which can be safely inserted into a
2446buffer, such that any following text will be always displayed to the
7d301ae6
CY
2447right of that string. (This works by appending an invisible Unicode
2448"LEFT-TO-RIGHT MARK" character if the argument string might need it.)
041d709f 2449
7d301ae6 2450This is useful when the buffer has overall left-to-right paragraph
dfdb4cad
CY
2451direction and you need to insert a string whose contents are not known
2452in advance, without disrupting the layout of the line.
041d709f 2453
bee0fcef 2454** Window changes
dfdb4cad 2455
c4682d18
MR
2456*** Window tree functions are accessible in Elisp.
2457Functions are provided to return the parent, siblings or child windows
2458of any window including internal windows (windows not associated with a
2459buffer) in the window tree.
dfdb4cad 2460
24300f5f
CY
2461**** New function `window-valid-p' gives non-nil for live and internal
2462windows.
dfdb4cad 2463
24300f5f 2464**** Window manipulation can deal with internal windows.
c4682d18
MR
2465Many window handling functions like `split-window', `delete-window', or
2466`delete-other-windows' as well as the window resizing functions can now
2467act on any window including internal ones.
dfdb4cad 2468
c4682d18
MR
2469*** window-total-height/-width vs window-body-height/-width.
2470The function `window-height' has been renamed to `window-total-height'
2471and `window-width' has been renamed to `window-body-width'. The old
2472names are provided as aliases. Two new functions `window-total-width'
2473and `window-body-height' are provided.
dfdb4cad 2474
c4682d18
MR
2475*** Window parameters specific to window handling functions.
2476For each window you can specify a parameter to override the default
2477behavior of a number of functions like `split-window', `delete-window'
ed6235ea
MR
2478and `delete-other-windows'. The variable `ignore-window-parameters'
2479allows to ignore processing such parameters.
dfdb4cad 2480
c4682d18 2481*** New semantics of third argument of `split-window'.
c4682d18
MR
2482The third argument of `split-window' has been renamed to SIDE and can be
2483set to any of the values 'below, 'right, 'above, or 'left to make the
2484new window appear on the corresponding side of the window that shall be
2485split. Any other value of SIDE will cause `split-window' to split the
2486window into two side-by-side windows as before.
dfdb4cad 2487
c4682d18 2488*** Window resizing functions.
487ffd7a 2489A new standard function for resizing windows called `window-resize' has
c4682d18
MR
2490been introduced. This and all other functions for resizing windows no
2491longer delete any windows when they become too small.
dfdb4cad 2492
b3c0dbfd
MR
2493*** Deleting the selected window now selects the most recently selected
2494live window on that frame instead.
dfdb4cad 2495
c4682d18
MR
2496*** `adjust-window-trailing-edge' adjustments.
2497`adjust-window-trailing-edge' can now deal with fixed-size windows and
2498is able to resize other windows if a window adjacent to the trailing
2499edge cannot be shrunk any more. This makes its behavior more similar to
2500that of Emacs 21 without compromising, however, its inability to delete
2501windows which was introduced in Emacs 22.
dfdb4cad 2502
c4682d18
MR
2503*** Window-local buffer lists.
2504Windows now have local buffer lists. This means that removing a buffer
2505from display in a window will preferably show the buffer previously
2506shown in that window with its previous window-start and window-point
2507positions. This also means that the same buffer may be automatically
2508shown twice even if it already appears in another window.
dfdb4cad 2509
bee0fcef
CY
2510*** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
2511which if non-nil requires the buffer to be displayed in the currently
2512selected window, signaling an error otherwise. If nil, another window
2513can be used, e.g. if the selected one is strongly dedicated.
dfdb4cad 2514
0a2132ba 2515*** `split-window-vertically' and `split-window-horizontally' renamed
2d197ffb
CY
2516to `split-window-below' and `split-window-right' respectively.
2517The old names are kept as aliases.
dfdb4cad 2518
0a2132ba
CY
2519*** Display actions
2520
2521**** The second arg to `display-buffer' and `pop-to-buffer' is now
2522named ACTION, and takes a display action of the same form as
2523`display-buffer-base-action' (see Changes, above). A non-nil,
2524non-list value is treated specially, as the old meaning.
2525
2526**** New variable `display-buffer-overriding-action'.
2527
2528**** The procedure of `display-buffer' etc. to choose a window is
2529determined by combining `display-buffer-overriding-action',
2530`display-buffer-alist', the ACTION arg, `display-buffer-base-action',
2531and `display-buffer-fallback-action'. The second and fourth of these
2532are user-customizable variables.
2533
2534See the docstring of `display-buffer' for details.
bee0fcef 2535
20d2304d
CY
2536*** New functions `window-state-get' and `window-state-put'.
2537These functions allow to save and restore the state of an arbitrary
2538frame or window as an Elisp object.
2539
a2a25d24 2540** Completion
041d709f 2541
7d301ae6
CY
2542*** New variable `completion-extra-properties' used to specify extra
2543properties of the current completion:
a2a25d24
SM
2544- :annotate-function, same as the old completion-annotate-function.
2545- :exit-function, function to call after completion took place.
2546
7d301ae6
CY
2547*** Functions on `completion-at-point-functions' can return any of the
2548properties valid for `completion-extra-properties'.
a2a25d24 2549
7d301ae6 2550*** `completion-annotate-function' is obsolete.
a2a25d24 2551
620c53a6
SM
2552*** New `metadata' method for completion tables. The metadata thus returned
2553can specify various details of the data returned by `all-completions':
2554- `category' is the kind of objects returned (e.g., `buffer', `file', ...),
2555 used to select a style in completion-category-overrides.
2556- `annotation-function' to add annotations in *Completions*.
2557- `display-sort-function' to specify how to sort entries in *Completions*.
2558- `cycle-sort-function' to specify how to sort entries when cycling.
2559
7d301ae6
CY
2560*** `minibuffer-local-filename-must-match-map' is not used any more.
2561Instead, the bindings in `minibuffer-local-filename-completion-map'
2562are combined with `minibuffer-local-must-match-map'.
de09aa52
CY
2563
2564*** New variable `completing-read-function' allows overriding the
2565behavior of `completing-read'.
2566
f042970d 2567** `glyphless-char-display' can now distinguish between graphical and
16a43933
CY
2568text terminal display, via a char-table entry that is a cons cell.
2569
7d301ae6 2570** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
f6d62986
SM
2571Instead, the offending function is removed.
2572
b1f6fa26
CY
2573** New hook types
2574
2575*** New function `run-hook-wrapped' for running an abnormal hook by
2576passing the hook functions as arguments to a "wrapping" function.
e7bc51d0 2577Like `run-hook-with-args-until-success', it stops at the first
5385447f 2578non-nil return value.
e7bc51d0 2579
b1f6fa26
CY
2580*** New macro `with-wrapper-hook' for running an abnormal hook as a
2581set of "wrapping" filters, similar to around advice.
54521c99
GM
2582(A version of this macro was actually added in Emacs 23.2 but was not
2583advertised at the time.)
f6d62986 2584
0b19b281 2585** Debugger changes
dfdb4cad 2586
0b19b281 2587*** New macro `condition-case-unless-debug' (this was actually added in
1be3ca5a 2588Emacs 23.1 as condition-case-no-debug, but not advertised)
dfdb4cad 2589
0b19b281 2590*** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
dfdb4cad 2591
0b19b281 2592*** Variable `stack-trace-on-error' removed.
dfdb4cad 2593
0b19b281
CY
2594*** The debugger can now "continue" from an error, which means it will
2595jump to the error handler as if the debugger had not been invoked
2596instead of jumping all the way to the top-level.
dfdb4cad 2597
0b19b281
CY
2598*** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
2599This can be useful when `inhibit-quit' is set.
d6b1d521 2600
953cebf5 2601** The new function `server-eval-at' allows evaluation of Lisp forms on
37576acd 2602named Emacs server instances.
7deebf1b 2603
1b9f60cc
GM
2604** `call-process' and `call-process-region' allow a `(:file "file")' spec
2605to redirect STDOUT to a file.
7deebf1b 2606
7d301ae6
CY
2607** The function `format-time-string' now supports the %N directive,
2608for higher-resolution time stamps.
da97a9e6 2609
0b19b281 2610** New input reading functions
dfdb4cad 2611
0b19b281
CY
2612*** New function `read-char-choice' reads a restricted set of
2613characters, discarding any inputs not inside the set.
dfdb4cad 2614
0b19b281
CY
2615*** The command `read-color' now requires a match for a color name
2616or RGB triplet, instead of signaling an error if the user provides
2617invalid input.
dfdb4cad 2618
0b19b281 2619**** `facemenu-read-color' is now an alias for `read-color'.
3ef01959 2620
2e288d54
JB
2621** `image-library-alist' is renamed to `dynamic-library-alist'.
2622The variable is now used to load all kind of supported dynamic libraries,
2623not just image libraries. The previous name is still available as an
2624obsolete alias.
2625
0b19b281 2626** Syntax parsing changes
dfdb4cad 2627
0b19b281 2628*** New variable `syntax-propertize-function'.
04e2ce72 2629This replaces `font-lock-syntactic-keywords' which is now obsolete.
cf38dd42
SM
2630This allows syntax-table properties to be set independently from font-lock:
2631just call syntax-propertize to make sure the text is propertized.
2632Together with this new variable come a new hook
2633syntax-propertize-extend-region-functions, as well as two helper functions:
2634syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
2635as-is; and syntax-propertize-rules which provides a new way to specify
2636syntactic rules.
dfdb4cad 2637
0b19b281 2638*** Syntax tables support a new "comment style c" additionally to style b.
a2e5caf7 2639
7d301ae6 2640** New hook `post-self-insert-hook', run after `self-insert-command'.
041d709f 2641
4e2db1fe 2642** frame-local variables cannot be let-bound any more.
041d709f 2643
15de15c6 2644** Major and minor mode changes
dfdb4cad 2645
0b19b281
CY
2646*** `set-auto-mode' now respects mode: local variables at the end of files,
2647as well as those in the -*- line.
dfdb4cad 2648
15de15c6
CY
2649*** `prog-mode' is a new major mode from which programming modes
2650should be derived.
dfdb4cad 2651
15de15c6
CY
2652**** `prog-mode-hook' can be used to enable features for programming
2653modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
2654on-the-fly spell checking for comments and strings.
dfdb4cad 2655
15de15c6
CY
2656*** New hook `change-major-mode-after-body-hook', run by
2657`run-mode-hooks' just before any other mode hooks.
dfdb4cad 2658
7a9a2fc6
GM
2659*** Enabled globalized minor modes can be disabled in specific major modes.
2660If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
2661major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
dfdb4cad 2662
feb8a83a 2663*** `define-minor-mode' accepts new keywords :variable, :after-hook.
f44379e7 2664
7d301ae6
CY
2665** File-handling changes
2666
7d301ae6 2667*** `delete-file' and `delete-directory' now accept optional arg TRASH.
f1a5d776
CY
2668Trashing is performed if TRASH and `delete-by-moving-to-trash' are
2669both non-nil. Interactively, TRASH defaults to t, unless a prefix
2670argument is supplied (see Trash changes, above).
53967e09 2671
7d301ae6 2672*** New file predicates: `file-equal-p', `file-in-directory-p'.
ec70a47d 2673
4039c786
CY
2674** Tool-bars can display separators.
2675Tool-bar separators are handled like menu separators in menu-bar maps,
94975270 2676i.e. via menu entries of the form `(menu-item "--")'.
9317e499 2677
00fe2df1
JL
2678** Image API
2679
18af70d0
CY
2680*** Animated images support (currently animated gifs only).
2681
2682**** `image-animated-p' returns non-nil if an image can be animated.
2683
2684**** `image-animate' animates a supplied image spec.
2685
2686**** `image-animate-timer' returns the timer object for an image that
2687is being animated.
00fe2df1 2688
7cb76fe0
GM
2689*** `image-extension-data' has been renamed to `image-metadata'.
2690The old name is an obsolete alias to the new one.
1546c559 2691
b4ac6e8c
GM
2692*** Image mode can view any image type that ImageMagick supports.
2693This requires Emacs to be built with ImageMagick support.
7d301ae6
CY
2694
2695**** New function `imagemagick-types', defined if ImageMagick support
2696is enabled, returns a list of image file extensions that your
2697ImageMagick installation supports.
2698
2699**** New function `imagemagick-register-types' enables ImageMagick
2700image types in Image mode and in `create-image' and other helper
2701functions.
2702
2703**** New option `imagemagick-types-inhibit' excludes certain
2704ImageMagick image types from `imagemagick-register-types'.
2705
7d301ae6
CY
2706**** With ImageMagick support, there are extra Image mode commands to
2707resize and rotate images: `image-transform-fit-to-height',
2708`image-transform-fit-to-width', `image-transform-set-rotation', and
2709`image-transform-set-scale'.
041d709f 2710
7d301ae6
CY
2711** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
2712passes it to the mail user agent function. This argument specifies an
2713action for returning to the caller after finishing with the mail. For
2714example, this is used by Rmail to optionally delete a mail window.
b4ac6e8c 2715
71c17aec 2716** XML and HTML parsing
483ab230
CY
2717If Emacs is compiled with libxml2 support, there are two new
2718functions: `libxml-parse-html-region' (which parses "real world" HTML)
2719and `libxml-parse-xml-region' (which parses XML). Both return an
2720Emacs Lisp parse tree.
4b9832a6 2721
7d301ae6 2722** Networking and encryption changes
e2574f2c 2723
7d301ae6
CY
2724*** `open-network-stream' can now be used to open an encrypted stream.
2725It now accepts an optional `:type' parameter for initiating a TLS
2726connection, directly or via STARTTLS. To do STARTTLS, additional
2727parameters (`:end-of-command', `:success', `:capabilities-command')
2728must also be supplied.
2729
2730*** New library gnutls.el.
dfdb4cad
CY
2731The new function `gnutls-available-p' returns non-nil if Emacs is
2732built with GnuTLS support. The main entry points are
2733`open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
2734these functions through `open-network-stream', because that can
7d301ae6
CY
2735upgrade connections through STARTTLS opportunistically or use plain
2736SSL, depending on your needs. For debugging, set `gnutls-log-level'
2737greater than 0.
2738
7d301ae6
CY
2739*** New primitive `secure-hash' that supports many secure hash algorithms:
2740md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
2741sha1.el has been removed. The `sha1' feature is provided by default.
71c17aec 2742
a6020335
MH
2743** Isearch
2744
2745*** New hook `isearch-update-post-hook' that runs in `isearch-update'.
2746
9326ba26
CY
2747** Progress reporters can now "spin".
2748The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
2749now be nil, or omitted. This makes a "non-numeric" reporter. Each
2750time you call `progress-reporter-update' on that progress reporter,
2751with a nil or omitted VALUE argument, the reporter message is
2752displayed with a "spinning bar".
2753
3e214b50
JB
2754** New variable `revert-buffer-in-progress-p' is true while a buffer is
2755being reverted, even if the buffer has a local `revert-buffer-function'.
2756
001bf877
GM
2757** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
2758If delayed-warnings-list is non-nil, the command loop calls
7d301ae6
CY
2759`delayed-warnings-hook' after `post-command-hook'. At present, this
2760is only used by Emacs on some platforms to display warnings during
2761startup, which might otherwise not be noticed. This uses the
2762functions `display-delayed-warnings' and `collapse-delayed-warnings'.
001bf877 2763
6420d28b
CY
2764** rx.el has a new `group-n' construct for explicitly numbered groups.
2765
dac86404
GM
2766** New function `make-composed-keymap' that constructs a new keymap
2767from multiple input maps. You can use this to make a keymap that
2768inherits from multiple maps, eg:
2769 (set-keymap-parent newmap (make-composed-keymap othermap parent))
43dc9f5b 2770
c8f6ec5c
GM
2771** New function `string-prefix-p'.
2772(This was actually added in Emacs 23.2 but was not advertised at the time.)
2773
27f7ef2f 2774** New reader macro ## that stands for the empty symbol.
43dc9f5b
AS
2775This means that the empty symbol can now be read back. Also, #: by itself
2776(when not immediately followed by a possible symbol character) stands for
2777an empty uninterned symbol.
041d709f 2778
fead402d
CY
2779** New math functions `isnan', `copysign', `frexp', `ldexp'.
2780
7d301ae6 2781** The following functions and variables are obsolete:
041d709f 2782
05f77e38
GM
2783*** `tooltip-use-echo-area' is obsolete.
2784Rather than setting this to t, disable Tooltip mode instead.
2785
041d709f
CY
2786*** buffer-substring-filters is obsolete.
2787Use `filter-buffer-substring-functions' instead.
2788
2789*** `byte-compile-disable-print-circle' is obsolete.
2790
2791*** `deferred-action-list' and `deferred-action-function' are obsolete.
f160676e
GM
2792Use `post-command-hook' instead.
2793
67e729a5
CY
2794*** `font-lock-maximum-size' is obsolete.
2795
eb199145 2796\f
93e0bed6 2797* Changes in Emacs 24.1 on Non-Free Operating Systems
d53a60a6 2798
7a22e700 2799** On MS Windows, Emacs warns when using the obsolete init file _emacs,
a2f0118c
GM
2800and also when HOME is set to C:\ by default.
2801
7a22e700 2802** New configure.bat options
04779484 2803
7a22e700 2804*** --enable-checking builds Emacs with extra runtime checks.
e3aef5c6 2805
7a22e700 2806*** --distfiles specifies files to be included in binary distribution.
e2574f2c 2807
7a22e700
OK
2808*** --without-gnutls disables automatic GnuTLS detection.
2809
a0d363f4 2810*** --lib for general library linkage, works with the USER_LIBS build variable.
e2574f2c 2811
0a19a6f8 2812** New make target `dist' to create binary distribution for MS Windows.
e3aef5c6 2813
1f5e1a16
GM
2814** The Lisp function `w32-default-color-map' is now obsolete.
2815(It is only used internally in the Emacs C code.)
5430d399 2816
1f5e1a16
GM
2817** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
2818reappear on mouse-over. (Requires OS X 10.6 or later.)
04e2ce72 2819
ad7c802c
CY
2820** On Mac OS X, dragging a file into Emacs visits the file, like on
2821other platforms, rather than inserting its contents into the buffer.
2822
05197f40 2823\f
a933dad1 2824----------------------------------------------------------------------
5b87ad55 2825This file is part of GNU Emacs.
a933dad1 2826
ab73e885 2827GNU Emacs is free software: you can redistribute it and/or modify
5b87ad55 2828it under the terms of the GNU General Public License as published by
ab73e885
GM
2829the Free Software Foundation, either version 3 of the License, or
2830(at your option) any later version.
5b87ad55
GM
2831
2832GNU Emacs is distributed in the hope that it will be useful,
2833but WITHOUT ANY WARRANTY; without even the implied warranty of
2834MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
2835GNU General Public License for more details.
a933dad1 2836
5b87ad55 2837You should have received a copy of the GNU General Public License
ab73e885 2838along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
a933dad1 2839
05197f40 2840\f
a933dad1
DL
2841Local variables:
2842mode: outline
2843paragraph-separate: "[ \f]*$"
2844end: