Merge from mainline.
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1 GNU Emacs NEWS -- history of user-visible changes.
2
3 Copyright (C) 2010-2011 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
5
6 Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 If possible, use M-x report-emacs-bug.
8
9 This file is about changes in Emacs version 24.
10
11 See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12 and NEWS.1-17 for changes in older Emacs versions.
13
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
16
17
18 Temporary note:
19 +++ indicates that the appropriate manual has already been updated.
20 --- means no change in the manuals is called for.
21 When you add a new item, please add it without either +++ or ---
22 so we will look at it and add it to the manual.
23
24 \f
25 * Installation Changes in Emacs 24.1
26
27 ** Configure links against libselinux if it is found.
28 You can disable this by using --without-selinux.
29
30 ---
31 ** By default, the installed Info and man pages are compressed.
32 You can disable this by configuring --without-compress-info.
33
34 ---
35 ** There are new configure options:
36 --with-mmdf, --with-mail-unlink, --with-mailhost.
37 These provide no new functionality, they just remove the need to edit
38 lib-src/Makefile by hand in order to use the associated features.
39
40 ---
41 ** Emacs can be compiled against Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
42 to configure. Note that other libraries used by Emacs, RSVG and GConf,
43 also depend on Gtk+. You can disable them with --without-rsvg and
44 --without-gconf.
45
46 ** There is a new configure option --enable-use-lisp-union-type.
47 This is only useful for Emacs developers to debug certain types of bugs.
48 This is not a new feature; only the configure flag is new.
49
50 ---
51 ** New translation of the Emacs Tutorial in Hebrew is available.
52 Type `C-u C-h t' to choose it in case your language setup doesn't
53 automatically select it.
54
55 \f
56 * Startup Changes in Emacs 24.1
57
58 ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
59 command line arguments, and the EMACS_UNIBYTE environment variable, no
60 longer have any effect. (They were declared obsolete in Emacs 23.)
61
62 ** New command line option `--no-site-lisp' removes site-lisp directories
63 from load-path. -Q now implies this.
64
65 ** On Windows, Emacs now warns when the obsolete _emacs init file is used,
66 and also when HOME is set to C:\ by default.
67
68 \f
69 * Changes in Emacs 24.1
70
71 ** Completion in a non-minibuffer now tries to detect the end of completion
72 and pops down the *Completions* buffer accordingly.
73
74 ** emacsclient changes
75
76 *** New emacsclient argument --parent-id ID can be used to open a
77 client frame in parent X window ID, via XEmbed. This works like the
78 --parent-id argument to Emacs.
79
80 +++
81 *** New emacsclient argument -q/--quiet suppresses some status messages.
82
83 *** If emacsclient shuts down as a result of Emacs signalling an
84 error, its exit status is 1.
85
86 ** Completion can cycle, depending on completion-cycle-threshold.
87
88 ** `completing-read' can be customized using the new variable
89 `completing-read-function'.
90
91 ** auto-mode-case-fold is now enabled by default.
92
93 +++
94 ** Emacs now supports display and editing of bidirectional text.
95
96 See the node "Bidirectional Editing" in the Emacs Manual for some
97 initial documentation.
98
99 To turn this on in any given buffer, set the buffer-local variable
100 `bidi-display-reordering' to a non-nil value. The default is nil.
101
102 The buffer-local variable `bidi-paragraph-direction', if non-nil,
103 forces each paragraph in the buffer to have its base direction
104 according to the value of this variable. Possible values are
105 `right-to-left' and `left-to-right'. If the value is nil (the
106 default), Emacs determines the base direction of each paragraph from
107 its text, as specified by the Unicode Bidirectional Algorithm.
108
109 The function `current-bidi-paragraph-direction' returns the actual
110 value of paragraph base direction at point.
111
112 Reordering of bidirectional text for display in Emacs is a "Full
113 bidirectionality" class implementation of the Unicode Bidirectional
114 Algorithm.
115
116 Note that some advanced display features, such as overlay strings and
117 `display' text properties, do not yet work correctly when
118 bidirectional text is reordered for display.
119
120 ** GTK scroll-bars are now placed on the right by default.
121 Use `set-scroll-bar-mode' to change this.
122
123 ** GTK tool bars can have just text, just images or images and text.
124 Customize `tool-bar-style' to choose style. On a Gnome desktop, the default
125 is taken from the desktop settings.
126
127 ** GTK tool bars can be placed on the left/right or top/bottom of the frame.
128 The frame-parameter tool-bar-position controls this. It takes the values
129 top, left, right or bottom. The Options => Show/Hide menu has entries
130 for this.
131
132 ** ImageMagick support.
133 It is now possible to use the ImageMagick library to load many new
134 image formats in Emacs. By default, Emacs links with the ImageMagick
135 libraries if they are present at build time. This needs ImageMagick
136 6.2.8 or newer (versions newer than 6.0.7 _may_ work but have not been
137 tested). To disable ImageMagick support, use the configure option
138 `--without-imagemagick'.
139
140 The new function `imagemagick-types' returns a list of image file
141 extensions that your installation of ImageMagick supports. The
142 function `imagemagick-register-types' enables ImageMagick support for
143 these image types, minus those listed in `imagemagick-types-inhibit'.
144
145 See the Emacs Lisp Reference Manual for more information.
146
147 ** The colors for selected text (the region face) are taken from the GTK
148 theme when Emacs is built with GTK.
149
150 ** Emacs uses GTK tooltips by default if built with GTK. You can turn that
151 off by customizing x-gtk-use-system-tooltips.
152
153 ** Lucid menus and dialogs can display antialiased fonts if Emacs is built
154 with Xft. To change font, use the X resource font, for example:
155 Emacs.pane.menubar.font: Courier-12
156
157 +++
158 ** Enhanced support for characters that have no glyphs in available fonts.
159 If a character has no glyphs in any of the available fonts, Emacs by
160 default will display it either as a hexadecimal code in a box or as a
161 thin 1-pixel space. In addition to these two methods, Emacs can
162 display these characters as empty box, as an acronym, or not display
163 them at all. To change how these characters are displayed, customize
164 the variable `glyphless-char-display-control'.
165
166 On character terminals these methods are used for characters that
167 cannot be encoded by the `terminal-coding-system'.
168
169 ** On graphical displays, the mode-line no longer ends in dashes.
170
171 ** On Nextstep/OSX, the menu bar can be hidden by customizing
172 ns-auto-hide-menu-bar.
173
174 ** Basic SELinux support has been added.
175 This requires Emacs to be linked with libselinux at build time.
176
177 *** Emacs preserves the SELinux file context when backing up, and
178 optionally when copying files. To this end, copy-file has an extra
179 optional argument, and backup-buffer and friends include the SELinux
180 context in their return values.
181
182 *** The new functions file-selinux-context and set-file-selinux-context
183 get and set the SELinux context of a file.
184
185 *** Tramp offers handlers for file-selinux-context and set-file-selinux-context
186 for remote machines which support SELinux.
187
188 +++
189 ** The function format-time-string now supports the %N directive, for
190 higher-resolution time stamps.
191
192 ** The function kill-emacs is now run upon receipt of the signals SIGTERM
193 and SIGHUP, and upon SIGINT in batch mode.
194
195 ** kill-emacs-hook is now also run in batch mode.
196 If you have code that adds something to kill-emacs-hook, you should
197 consider if it is still appropriate to add it in the noninteractive case.
198
199 ** New scrolling commands `scroll-up-command' and `scroll-down-command'
200 (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
201 of buffer at first key-press (instead move to top/bottom of buffer)
202 when a new variable `scroll-error-top-bottom' is non-nil.
203
204 ** New scrolling commands `scroll-up-line' and `scroll-down-line'
205 scroll a line instead of full screen.
206
207 ** New property `scroll-command' should be set on a command's symbol to
208 define it as a scroll command affected by `scroll-preserve-screen-position'.
209
210 +++
211 ** If you customize `scroll-conservatively' to a value greater than 100,
212 Emacs will never recenter point in the window when it scrolls due to
213 cursor motion commands or commands that move point (e.f., `M-g M-g').
214 Previously, you needed to use `most-positive-fixnum' as the value of
215 `scroll-conservatively' to achieve the same effect.
216
217 ---
218 ** ``Aggressive'' scrolling now honors the scroll margins.
219 If you customize `scroll-up-aggressively' or
220 `scroll-down-aggressively' and move point off the window, Emacs now
221 scrolls the window so as to avoid positioning point inside the scroll
222 margin.
223
224 ** Trash changes
225
226 *** `delete-by-moving-to-trash' now only affects commands that specify
227 trashing. This avoids inadvertently trashing temporary files.
228
229 *** Calling `delete-file' or `delete-directory' with a prefix argument
230 now forces true deletion, regardless of `delete-by-moving-to-trash'.
231
232 ** New option `list-colors-sort' defines the color sort order
233 for `list-colors-display'.
234
235 ** An Emacs Lisp package manager is now included.
236 This is a convenient way to download and install additional packages,
237 from a package repository at elpa.gnu.org.
238
239 *** `M-x list-packages' shows a list of packages, which can be
240 selected for installation.
241
242 *** New command `describe-package', bound to `C-h P'.
243
244 *** By default, all installed packages are loaded and activated
245 automatically when Emacs starts up. To disable this, set
246 `package-enable-at-startup' to nil. To change which packages are
247 loaded, customize `package-load-list'.
248
249 ** An Emacs Lisp testing tool is now included.
250 Emacs Lisp developers can use this tool to write automated tests for
251 their code. See the ERT info manual for details.
252
253 ** Custom Themes
254
255 *** `M-x customize-themes' lists Custom themes which can be enabled.
256
257 *** New option `custom-theme-load-path' is the load path for themes.
258 Emacs no longer looks for custom themes in `load-path'. The default
259 is to search in `custom-theme-directory', followed by a built-in theme
260 directory named "themes/" in `data-directory'.
261
262 *** New option `custom-safe-themes' records known-safe theme files.
263 If a theme is not in this list, Emacs queries before loading it, and
264 offers to save the theme to `custom-safe-themes' automatically. By
265 default, all themes included in Emacs are treated as safe.
266
267 ** The user option `remote-file-name-inhibit-cache' controls whether
268 the remote file-name cache is used for read access.
269
270 ** The standalone programs lib-src/digest-doc and sorted-doc have been
271 replaced with Lisp commands `doc-file-to-man' and `doc-file-to-info'.
272
273 ** The variable `focus-follows-mouse' now always defaults to nil.
274
275 \f
276 * Editing Changes in Emacs 24.1
277
278 ** Search changes
279
280 +++
281 *** C-y in Isearch is now bound to isearch-yank-kill, instead of
282 isearch-yank-line.
283
284 ---
285 *** M-y in Isearch is now bound to isearch-yank-pop, instead of
286 isearch-yank-kill.
287
288 +++
289 *** M-s C-e in Isearch is now bound to isearch-yank-line.
290
291 +++
292 ** There is a new command `count-words-region', which does what you expect.
293
294 ** completion-at-point now handles tags and semantic completion.
295
296 ** The default value of `backup-by-copying-when-mismatch' is now t.
297
298 ** The command `just-one-space' (C-SPC), if given a negative argument,
299 also deletes newlines around point.
300
301 ** Deletion changes
302
303 *** New option `delete-active-region'.
304 If non-nil, C-d, [delete], and DEL delete the region if it is active
305 and no prefix argument is given. If set to `kill', these commands
306 kill instead.
307
308 *** New command `delete-forward-char', bound to C-d and [delete].
309 This is meant for interactive use, and obeys `delete-active-region'.
310 The command `delete-char' does not obey `delete-active-region'.
311
312 *** `delete-backward-char' is now a Lisp function.
313 Apart from obeying `delete-active-region', its behavior is unchanged.
314 However, the byte compiler now warns if it is called from Lisp; you
315 should use delete-char with a negative argument instead.
316
317 *** The option `mouse-region-delete-keys' has been deleted.
318
319 ** Selection changes.
320
321 The default handling of clipboard and primary selections was changed
322 to conform with modern X applications. In short, most commands for
323 killing and yanking text now use the clipboard, while mouse commands
324 use the primary selection.
325
326 In the following, we provide a list of these changes, followed by a
327 list of steps to get the old behavior back if you prefer that.
328
329 *** `mouse-drag-copy-region' now defaults to nil.
330 *** `select-active-regions' now defaults to t.
331 Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
332 the kill-ring. The selected text is put in the primary selection, if
333 the system possesses a separate primary selection facility (e.g. X).
334
335 **** `select-active-regions' also accepts a new value, `only'.
336 This means to only set the primary selection for temporarily active
337 regions (usually made by mouse-dragging or shift-selection);
338 "ordinary" active regions, such as those made with C-SPC followed by
339 point motion, do not alter the primary selection.
340
341 *** mouse-2 is now bound to `mouse-yank-primary'.
342 This pastes from the primary selection, ignoring the kill-ring.
343 Previously, mouse-2 was bound to `mouse-yank-at-click'.
344
345 *** `x-select-enable-clipboard' now defaults to t on all platforms.
346 *** `x-select-enable-primary' now defaults to nil.
347 Thus, commands that kill text or copy it to the kill-ring (such as
348 M-w, C-w, and C-k) also use the clipboard---not the primary selection.
349
350 **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
351 exactly equivalent to, respectively M-w, C-w, and C-y.
352
353 **** Note that on MS-Windows, `x-select-enable-clipboard' was already
354 non-nil by default, as Windows does not support the primary selection
355 between applications.
356
357 *** To return to the previous behavior, do the following:
358
359 **** Change `select-active-regions' to nil.
360 **** Change `mouse-drag-copy-region' to t.
361 **** Change `x-select-enable-primary' to t (on X only).
362 **** Change `x-select-enable-clipboard' to nil.
363 **** Bind `mouse-yank-at-click' to mouse-2.
364
365 *** Support for X cut buffers has been removed.
366
367 ** New command `rectangle-number-lines', bound to `C-x r N', numbers
368 the lines in the current rectangle. With an prefix argument, this
369 prompts for a number to count from and for a format string.
370
371 ** The command shell prompts for the shell path name, when the default
372 directory is a remote file name and neither environment variable
373 $ESHELL nor variable `explicit-shell-file-name' is set.
374
375 \f
376 * Changes in Specialized Modes and Packages in Emacs 24.1
377
378 ** comint and modes derived from it use the generic completion code.
379
380 ** The compile.el mode can be used without font-lock-mode.
381 `compilation-parse-errors-function' is now obsolete.
382
383 ** The Landmark game is now invoked with `landmark', not `lm'.
384
385 ** Prolog mode has been completely revamped, with lots of additional
386 functionality such as more intelligent indentation, electricity, support for
387 more variants, including Mercury, and a lot more.
388
389 ** shell-mode can track your cwd by reading it from your prompt.
390 Just set shell-dir-cookie-re to an appropriate regexp.
391
392 ** Modula-2 mode provides auto-indentation.
393
394 ** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
395
396 ** FIXME: xdg-open for browse-url and reportbug, 2010/08.
397
398 ** Archive Mode has basic support to browse 7z archives.
399
400 ** browse-url has gotten a new variable that is used for mailto: URLs,
401 `browse-url-mailto-function', which defaults to `browse-url-mail'.
402
403 ** `url-queue-retrieve' downloads web pages asynchronously, but allow
404 controlling the degree of parallelism.
405
406 ** Directory local variables can apply to file-less buffers, in certain modes
407 (eg dired, vc-dir, log-edit). For example, adding
408 "(diff-mode . ((mode . whitespace)))" to your .dir-locals.el file,
409 will turn on `whitespace-mode' for *vc-diff* buffers. Modes should
410 call `hack-dir-local-variables-non-file-buffer' to support this.
411
412 +++
413 ** You can prevent directory local variables from applying to subdirectories.
414 Add an element (subdirs . nil) to the alist portion of any variables
415 settings to indicate said section should not be applied to subdirectories.
416
417 ** ERC changes
418
419 *** New vars `erc-autojoin-timing' and `erc-autojoin-delay'.
420 If the value of `erc-autojoin-timing' is 'ident, ERC autojoins after a
421 successful NickServ identification, or after `erc-autojoin-delay'
422 seconds. The default value, 'ident, means to autojoin immediately
423 after connecting.
424
425 *** New variable `erc-coding-system-precedence': If we use `undecided'
426 as the server coding system, this variable will then be consulted.
427 The default is to decode strings that can be decoded as utf-8 as
428 utf-8, and do the normal `undecided' decoding for the rest.
429
430 ** Eshell changes
431
432 *** The default value of eshell-directory-name is a directory named
433 "eshell" in `user-emacs-directory'. If the old "~/.eshell/" directory
434 exists, that is used instead.
435
436 ** In ido-mode, C-v is no longer bound to ido-toggle-vc.
437 The reason is that this interferes with cua-mode.
438
439 ** partial-completion-mode is now obsolete.
440 You can get a comparable behavior with:
441 (setq completion-styles '(partial-completion initials))
442 (setq completion-pcm-complete-word-inserts-delimiters t)
443
444 ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
445
446 ** server can listen on a specific port using the server-port option.
447
448 ** Calendar, Diary, and Appt
449
450 *** New function `diary-hebrew-birthday'.
451
452 ---
453 *** The obsolete (since Emacs 22.1) method of enabling the appt package
454 by adding appt-make-list to diary-hook has been removed. Use appt-activate.
455
456 ---
457 *** Some appt variables (obsolete since Emacs 22.1) have been removed:
458 appt-issue-message (use the function appt-activate)
459 appt-visible/appt-msg-window (use the variable appt-display-format)
460
461 ---
462 *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
463 view-diary-entries, list-diary-entries, show-all-diary-entries
464
465 ** Customize
466
467 *** Customize buffers now contain a search field.
468 The search is performed using `customize-apropos'.
469 To turn off the search field, set custom-search-field to nil.
470
471 *** Custom options now start out hidden if at their default values.
472 Use the arrow to the left of the option name to toggle visibility.
473
474 *** custom-buffer-sort-alphabetically now defaults to t.
475
476 *** The color widget now has a "Choose" button, which allows you to
477 choose a color via list-colors-display.
478
479 ** Dired-x
480
481 *** dired-jump and dired-jump-other-window called with a prefix argument
482 read a file name from the minibuffer instead of using buffer-file-name.
483
484 +++
485 *** The `dired local variables' feature provided by Dired-x is obsolete.
486 The standard directory local variables feature replaces it.
487
488 ** SQL Mode enhancements.
489
490 *** `sql-dialect' is a synonym for `sql-product'.
491
492 *** Added ability to login with a port on MySQL and Postgres.
493 The custom variable `sql-port' can be specified for connection to
494 MySQL or Postgres servers. By default, the port is not listed in
495 either login parameter, but will be added to the command line if set
496 to a non-zero value.
497
498 *** Dynamic selection of product in an SQL interactive session.
499 If you use `sql-product-interactive' to start an SQL interactive
500 session it uses the current value of `sql-product'. Preceding the
501 invocation with C-u will force it to ask for the product before
502 creating the session.
503
504 *** Renaming a SQL interactive buffer when it is created.
505 Prefixing the SQL interactive commands (`sql-sqlite', `sql-postgres',
506 `sql-mysql', etc.) with C-u will force a new interactive session to be
507 started and will prompt for the new name. This will reduce the need
508 for `sql-rename-buffer' is most common use cases.
509
510 *** Command continuation prompts in SQL interactive mode are suppressed.
511 Multiple line commands in SQL interactive mode, generate command
512 continuation prompts which needlessly confuse the output. These
513 prompts are now filtered out from the output. This change impacts
514 multiple line SQL statements entered with C-j between each line,
515 statements yanked into the buffer and statements sent with
516 `sql-send-*' functions.
517
518 *** Custom variables control prompting for login parameters.
519 Each supported product has a custom variable `sql-*-login-params'
520 which is a list of the parameters to be prompted for before a
521 connection is established.
522
523 The lists consist of the following five tokens: `user', `password',
524 `database', `server', and `port'. The order in which they appear is
525 the order in which they are prompted. The tokens symbols can be
526 replaced by a sublist starting with the token and followed by a plist
527 which control the prompting for values. The tokens `user',
528 `database', and `server' each can take a property of :default which
529 specifies the value to be used if no value is entered. The
530 `database', `server', and `port' tokens handle the :completion
531 property which restricts the entry to either one of the values in the
532 list or to one of the values returned by the function provided as the
533 property value. The `database' and `server' tokens also accept the
534 :file property whose value is a regexp to identify useful file names.
535
536 (user :default DEF)
537 (database :default DEF
538 :file FILEPAT
539 :completion COMPLETE)
540 (server :default DEF
541 :file FILEPAT
542 :completion COMPLETE)
543
544 The FILEPAT when :file is specified is a regexp that will match valid
545 file names (without the directory portion). Generally these strings
546 will be of the form ".+\.SUF" where SUF is the desired file suffix.
547
548 When :completion is specified, the COMPLETE corresponds to the
549 PREDICATE argument to the `completing-read' function (a list of
550 possible values or a function returning such a list).
551
552 *** Added `sql-connection-alist' to record login parameter values.
553 An alist for recording different username, database and server
554 values. If there are multiple databases that you connect to the
555 parameters needed can be stored in this alist.
556
557 For example, the following might be set in the user's init.el:
558
559 (setq sql-connection-alist
560 '((dev (sql-product 'sqlite)
561 (sql-database "/home/mmaug/dev.db"))
562 (prd (sql-product 'oracle)
563 (sql-user "mmaug")
564 (sql-database "iprd2a"))))
565
566 This defines two connections named "dev" and "prd".
567
568 *** Added `sql-connect' to use predefined connections.
569 Sets the login parameters based on the values in the
570 `sql-connection-alist' and start a SQL interactive session. Any
571 values specified in the connection will not be prompted for.
572
573 In the example above, if the user were to invoke M-x sql-connect, they
574 would be prompted for the connection. The user can respond with
575 either "dev" or "prd". The "dev" connection would connect to the
576 SQLite database without prompting; the "prd" connection would prompt
577 for the users password and then connect to the Oracle database.
578
579 **** Added SQL->Start... submenu when connections are defined.
580 When connections have been defined, there is a submenu available that
581 allows the user to select one to start a SQLi session. The "Start
582 SQLi Session" item moves to the "Start..." submenu when cnnections
583 have been defined.
584
585 **** Added "Save Connection" menu item in SQLi buffers.
586 When a SQLi session is not started by a connection then
587 `sql-save-connection' will gather the login params specified for the
588 session and save them as a new connection.
589
590 *** List database objects and details.
591 Once a SQL interactive session has been started, you can get a list of
592 the objects in the database and see details of those objects. The
593 objects shown and the details available are product specific.
594
595 **** List all objects.
596 Using `M-x sql-list-all', `C-c C-l a' or selecting "SQL->List all
597 objects" will list all the objects in the database. At a minimum it
598 lists the tables and views in the database. Preceding the command by
599 universal argument may provide additional details or extend the
600 listing to include other schemas objects. The list will appear in a
601 separate window in view-mode.
602
603 **** List Table details.
604 Using `M-x sql-list-table', `C-c C-l t' or selecting "SQL->List Table
605 details" will ask for the name of a database table or view and display
606 the list of columns in the relation. Preceding the command with the
607 universal argument may provide additional details about each column.
608 The list will appear in a separate window in view-mode.
609
610 *** Added option `sql-send-terminator'.
611 When set makes sure that each command sent with `sql-send-*' commands
612 are properly terminated and submitted to the SQL processor.
613
614 *** Added option `sql-oracle-scan-on'.
615 When set commands sent to Oracle's SQL*Plus are scanned for strings
616 starting with an ampersand and the user is asked for replacement text.
617 In general, the SQL*Plus option SCAN should always be set OFF under
618 SQL interactive mode and this option used in its place.
619
620 *** SQL interactive mode will replace tabs with spaces.
621 This prevents the command interpreter for MySQL and Postgres from
622 listing object name completions when being sent text via
623 `sql-send-*' functions.
624
625 *** An API for manipulating SQL product definitions has been added.
626
627 ** sregex.el is now obsolete, since rx.el is a strict superset.
628
629 ** s-region.el and pc-select are now declared obsolete,
630 superseded by shift-select-mode enabled by default in 23.1.
631 ** pc-mode.el is also declared obsolete.
632 ** gdb-mi
633
634 *** GDB User Interface migrated to GDB Machine Interface and now
635 supports multithread non-stop debugging and debugging of several
636 threads simultaneously.
637
638 ** D-Bus
639
640 *** It is possible now, to access alternative buses than the default
641 system or session bus.
642
643 *** dbus-register-{service,method,property}
644 The -method and -property functions do not automatically register
645 names anymore.
646
647 The new function dbus-register-service registers a service known name
648 on a D-Bus without simultaneously registering a property or a method.
649
650 ** Tramp
651
652 *** There exists a new inline access method "ksu" (kerberized su).
653
654 *** The following access methods are discontinued: "ssh1_old",
655 "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
656
657 ** VC and related modes
658
659 *** Support for pulling on distributed version control systems.
660 The vc-pull command runs a "pull" operation, if it is supported.
661 This updates the current branch from upstream. A prefix argument
662 means to prompt the user for specifics, e.g. a pull location.
663
664 **** `vc-update' is now an alias for `vc-pull'.
665
666 **** Currently supported by Bzr, Git, and Mercurial.
667
668 *** Support for merging on distributed version control systems.
669 The vc-merge command now runs a "merge" operation, if it is supported.
670 This merges another branch into the current one. This command prompts
671 the user for specifics, e.g. a merge source.
672
673 **** Currently supported for Bzr, Git, and Mercurial.
674
675 *** Log entries in some Log View buffers can be toggled to display a
676 longer description by typing RET (log-view-toggle-entry-display).
677 In the Log View buffers made by `C-x v L' (vc-print-root-log), you can
678 use this to display the full log entry for the revision at point.
679
680 **** Currently supported for Bzr, Git, and Mercurial.
681
682 **** Packages using Log View mode can enable this functionality by
683 binding `log-view-expanded-log-entry-function' to a suitable function.
684
685 *** New command `vc-ediff' allows visual comparison of two revisions
686 of a file similar to `vc-diff', but using ediff backend.
687
688 ** Miscellaneous
689
690 ---
691 *** `copyright-fix-years' can optionally convert consecutive years to ranges.
692
693 *** New command `nato-region' converts text to NATO phonetic alphabet.
694
695 *** The new command `info-display-manual' will display an Info manual
696 specified by its name. If that manual is already visited in some Info
697 buffer within the current session, the command will display that
698 buffer. Otherwise, it will load the manual and display it. This is
699 handy if you have many manuals in many Info buffers, and don't
700 remember the name of the buffer visiting the manual you want to
701 consult.
702
703 \f
704 * New Modes and Packages in Emacs 24.1
705
706 ** New global minor modes electric-pair-mode, electric-indent-mode,
707 and electric-layout-mode.
708
709 ** tabulated-list.el provides a generic major mode for tabulated data,
710 from which other modes can be derived.
711
712 ** pcase.el provides the ML-style pattern matching macro `pcase'.
713
714 ** secrets.el is an implementation of the Secret Service API, an
715 interface to password managers like GNOME Keyring or KDE Wallet. The
716 Secret Service API requires D-Bus for communication. The command
717 `secrets-show-secrets' offers a buffer with a visualization of the
718 secrets.
719
720 ** notifications.el provides an implementation of the Desktop
721 Notifications API. It requires D-Bus for communication.
722
723 ** soap-client.el supports access to SOAP web services from Emacs.
724 soap-inspect.el is an interactive inspector for SOAP WSDL structures.
725
726 ** xmodmap-generic-mode for xmodmap files.
727
728 \f
729 * Incompatible Lisp Changes in Emacs 24.1
730
731 +++
732 ** Integer arithmetic overflow now yields the nearest floating-piont
733 value rather than wrapping around. For example, on a 32-bit machine,
734 (1+ 536870911) yields 536870912.0, instead of the -536870912 it
735 yielded in Emacs 23.3, or the 0 it yielded in Emacs 23.1.
736
737 ---
738 ** `char-direction-table' and the associated function `char-direction'
739 were deleted. They were buggy and inferior to the new support of
740 bidirectional editing introduced in Emacs 24. If you need the
741 bidirectional properties of a character, use `get-char-code-property'
742 with the last argument `bidi-class'.
743
744 ** `copy-directory' now copies the source directory as a subdirectory
745 of the target directory, if the latter is an existing directory. The
746 new optional arg COPY-CONTENTS, if non-nil, makes the function copy
747 the contents directly into a pre-existing target directory.
748
749 ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
750 passes it to the mail user agent function. This argument specifies an
751 action for returning to the caller after finishing with the mail.
752 This is currently used by Rmail to delete a mail window.
753
754 ** For mouse click input events in the text area, the Y pixel
755 coordinate in the POSITION list now counts from the top of the text
756 area, excluding any header line. Previously, it counted from the top
757 of the header line.
758
759 ** Remove obsolete name `e' (use `float-e' instead).
760
761 ** A backquote not followed by a space is now always treated as new-style.
762
763 ** Test for special mode-class was moved from view-file to view-buffer.
764 FIXME: This only says what was changed, but not what are the
765 programmer-visible consequences.
766
767 ** Passing a nil argument to a minor mode function now turns the mode
768 ON unconditionally.
769
770 ** During startup, Emacs no longer adds entries for `menu-bar-lines'
771 and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
772 With these alist entries omitted, `make-frame' checks the value of the
773 variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
774 a menu-bar or tool-bar, respectively. If the alist entries are added,
775 they override the value of `menu-bar-mode'/`tool-bar-mode'.
776
777 ** Regions created by mouse dragging are now normal active regions,
778 similar to the ones created by shift-selection. In previous Emacs
779 versions, these regions were delineated by `mouse-drag-overlay', which
780 has now been removed.
781
782 ** cl.el no longer provides `cl-19'.
783
784 ** The following functions and aliases, obsolete since at least Emacs 21.1,
785 have been removed:
786 comint-kill-output, decompose-composite-char, outline-visible,
787 internal-find-face, internal-get-face, frame-update-faces,
788 frame-update-face-colors, x-frob-font-weight, x-frob-font-slant,
789 x-make-font-bold, x-make-font-demibold, x-make-font-unbold
790 x-make-font-italic, x-make-font-oblique, x-make-font-unitalic
791 x-make-font-bold-italic, mldrag-drag-mode-line, mldrag-drag-vertical-line,
792 iswitchb-default-keybindings, char-bytes, isearch-return-char,
793 make-local-hook
794
795 ** The following variables and aliases, obsolete since at least Emacs 21.1,
796 have been removed:
797 checkdoc-minor-keymap, vc-header-alist, directory-sep-char,
798 font-lock-defaults-alist
799
800 ** The following files, obsolete since at least Emacs 21.1, have been removed:
801 sc.el, x-menu.el, rnews.el, rnewspost.el
802
803 ** FIXME finder-inf.el changes.
804
805 \f
806 * Lisp changes in Emacs 24.1
807
808 ** `glyphless-char-display' can now distinguish between graphical and
809 text terminal display, via a char-table entry that is a cons cell.
810
811 ** `open-network-stream' can now be used to open an encrypted stream.
812 It now accepts an optional `:type' parameter for initiating a TLS
813 connection, directly or via STARTTLS. To do STARTTLS, additional
814 parameters (`:end-of-command', `:success', `:capabilities-command')
815 must also be supplied.
816
817 ** Code can now use lexical scoping by default instead of dynamic scoping.
818 The `lexical-binding' variable lets code use lexical scoping for local
819 variables. It is typically set via file-local variables, in which case it
820 applies to all the code in that file.
821
822 *** `eval' takes a new optional argument `lexical' to choose the new lexical
823 binding instead of the old dynamic binding mode.
824
825 *** Lexically scoped interpreted functions are represented with a new form
826 of function value which looks like (closure ENV ARGS &rest BODY).
827
828 *** New macro `letrec' to define recursive local functions.
829
830 *** New function `special-variable-p' to check whether a variable is
831 declared as dynamically bound.
832
833 ** pre/post-command-hook are not reset to nil upon error.
834 Instead, the offending function is removed.
835
836 ** New low-level function run-hook-wrapped.
837
838 ** `server-eval-at' is provided to allow evaluating forms on different
839 Emacs server instances.
840
841 ** `call-process' allows a `(:file "file")' spec to redirect STDOUT to
842 a file.
843
844 ** byte-compile-disable-print-circle is obsolete.
845 ** deferred-action-list and deferred-action-function are obsolete.
846 ** Removed the stack-trace-on-error variable.
847 Also the debugger can now "continue" from an error, which means it will jump
848 to the error handler as if the debugger had not been invoked instead of
849 jumping all the way to the top-level.
850
851 ** New function `read-char-choice' reads a restricted set of characters,
852 discarding any inputs not inside the set.
853
854 ** `image-library-alist' is renamed to `dynamic-library-alist'.
855 The variable is now used to load all kind of supported dynamic libraries,
856 not just image libraries. The previous name is still available as an
857 obsolete alias.
858
859 ** New variable syntax-propertize-function to set syntax-table properties.
860 Replaces font-lock-syntactic-keywords which are now obsolete.
861 This allows syntax-table properties to be set independently from font-lock:
862 just call syntax-propertize to make sure the text is propertized.
863 Together with this new variable come a new hook
864 syntax-propertize-extend-region-functions, as well as two helper functions:
865 syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
866 as-is; and syntax-propertize-rules which provides a new way to specify
867 syntactic rules.
868
869 ** New hook post-self-insert-hook run at the end of self-insert-command.
870
871 +++
872 ** Syntax tables support a new "comment style c" additionally to style b.
873 ** frame-local variables cannot be let-bound any more.
874 ** prog-mode is a new major-mode meant to be the parent of programming mode.
875 ** define-minor-mode accepts a new keyword :variable.
876
877 ** `delete-file' and `delete-directory' now accept optional arg TRASH.
878 Trashing is performed if TRASH and `delete-by-moving-to-trash' are
879 both non-nil. Interactively, TRASH defaults to t, unless a prefix
880 argument is supplied (see Trash changes, above).
881
882 ** buffer-substring-filters is obsoleted by filter-buffer-substring-functions.
883
884 ** New completion style `substring'.
885
886 ** `facemenu-read-color' is now an alias for `read-color'.
887 The command `read-color' now requires a match for a color name or RGB
888 triplet, instead of signalling an error if the user provides a invalid
889 input.
890
891 ** Tool-bars can display separators.
892 Tool-bar separators are handled like menu separators in menu-bar maps,
893 i.e. via menu entries of the form `(menu-item "--")'.
894
895 ** Image API
896
897 *** When the image type is one of listed in `image-animated-types'
898 and the number of sub-images in the image is more than one, then the
899 new function `create-animated-image' creates an animated image where
900 sub-images are displayed successively with the duration defined by
901 `image-animate-max-time' and the delay between sub-images defined
902 by the Graphic Control Extension of the image.
903
904 *** `image-extension-data' is renamed to `image-metadata'.
905
906 ** XML and HTML parsing
907
908 *** If Emacs is compiled with libxml2 support (which is the default),
909 two new Emacs Lisp-level functions are defined:
910 `libxml-parse-html-region' (which will parse "real world" HTML)
911 and `libxml-parse-xml-region' (which parses XML). Both return an
912 Emacs Lisp parse tree.
913
914 FIXME: These should be front-ended by xml.el.
915
916 ** GnuTLS
917
918 *** Emacs can be compiled with libgnutls support
919 This is the default. You will then be able to use the functionality
920 in gnutls.el, namely the `open-gnutls-stream' and `gnutls-negotiate'
921 functions. It's easiest to use these functions through
922 `open-network-stream' because it can upgrade connections through
923 STARTTLS opportunistically or use plain SSL, depending on your needs.
924
925 Only versions 2.8.x and higher or GnuTLS have been tested.
926
927 *** gnutls-log-level
928 Set `gnutls-log-level' higher than 0 to get debug output. 1 is for
929 important messages, 2 is for debug data, and higher numbers are as per
930 the GnuTLS logging conventions. The output is in *Messages*.
931
932 ** Isearch
933
934 *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
935
936 ** Progress reporters can now "spin".
937 The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
938 now be nil, or omitted. This makes a "non-numeric" reporter. Each
939 time you call `progress-reporter-update' on that progress reporter,
940 with a nil or omitted VALUE argument, the reporter message is
941 displayed with a "spinning bar".
942
943 ** New variable `revert-buffer-in-progress-p' is true while a buffer is
944 being reverted, even if the buffer has a local `revert-buffer-function'.
945
946 ** New variables `delayed-warnings-list' and `delayed-warnings-hook' allow
947 deferring warnings until the main command loop is executed.
948
949 \f
950 * Changes in Emacs 24.1 on non-free operating systems
951
952 ** New configure.bat option --enable-checking builds Emacs with extra
953 runtime checks.
954
955 ** New configure.bat option --distfiles to specify files to be
956 included in binary distribution.
957
958 ** New configure.bat option --without-gnutls to disable automatic
959 GnuTLS detection.
960
961 ** New configure.bat option --lib for general library linkage, works
962 with the USER_LIBS build variable.
963
964 ** New make target `dist' to create binary distribution for MS Windows.
965
966 \f
967 ----------------------------------------------------------------------
968 This file is part of GNU Emacs.
969
970 GNU Emacs is free software: you can redistribute it and/or modify
971 it under the terms of the GNU General Public License as published by
972 the Free Software Foundation, either version 3 of the License, or
973 (at your option) any later version.
974
975 GNU Emacs is distributed in the hope that it will be useful,
976 but WITHOUT ANY WARRANTY; without even the implied warranty of
977 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
978 GNU General Public License for more details.
979
980 You should have received a copy of the GNU General Public License
981 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
982
983 \f
984 Local variables:
985 mode: outline
986 paragraph-separate: "[ \f]*$"
987 end: