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1GNU Emacs NEWS -- history of user-visible changes.
2
3Copyright (C) 2010-2012 Free Software Foundation, Inc.
4See the end of the file for license conditions.
5
6Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7If possible, use M-x report-emacs-bug.
8
9This file is about changes in Emacs version 24.
10
11See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12and NEWS.1-17 for changes in older Emacs versions.
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.
16
17
18Temporary note:
19 +++ indicates that the appropriate manual has already been updated.
20 --- means no change in the manuals is called for.
21When you add a new item, please add it without either +++ or ---
22so we will look at it and add it to the manual.
23
24\f
25* Installation Changes in Emacs 24.1
26
27---
28** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
29to configure. Note that other libraries used by Emacs, RSVG and GConf,
30also depend on Gtk+. You can disable them with --without-rsvg and
31--without-gconf.
32
33---
34** Emacs can be compiled with GnuTLS support.
35This happens by default if a suitably recent version of the library is
36found at build time. To prevent this, use the configure option
37`--without-gnutls'. See below for GnuTLS features.
38
39---
40** Emacs can be compiled with SELinux support.
41This happens by default if a suitably recent version of the library is
42found at build time. To prevent this, use the configure option
43`--without-selinux'. See below for SELinux features.
44
45---
46** Emacs can be compiled with ImageMagick support.
47This happens by default if a suitably recent version of the library is
48found at build time. To prevent this, use the configure option
49`--without-imagemagick'. See below for ImageMagick features.
50This feature is not available for the Nextstep or MS ports.
51
52---
53** Emacs can be compiled with libxml2 support.
54This happens by default if a suitably recent version of the library is
55found at build time. To prevent this, use the configure option
56`--without-xml2'. See below for libxml2 features.
57
58---
59** There is a new configure option --with-wide-int.
60With it, Emacs integers typically have 62 bits, even on 32-bit machines.
61On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
62to about 2 GiB.
63
64---
65** By default, the installed Info and man pages are compressed.
66You can disable this by configuring --without-compress-info.
67
68---
69** There are new configure options:
70--with-mmdf, --with-mail-unlink, --with-mailhost.
71These provide no new functionality, they just remove the need to edit
72lib-src/Makefile by hand in order to use the associated features.
73
74---
75** There is a new configure option --enable-use-lisp-union-type.
76This is only useful for Emacs developers to debug certain types of bugs.
77This is not a new feature; only the configure flag is new.
78
79---
80** The standalone programs digest-doc and sorted-doc are removed.
81Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
82
83---
84** The standalone program `fakemail' is removed.
85If you need it, feedmail.el provides a superset of the functionality.
86
87\f
88* Startup Changes in Emacs 24.1
89
90---
91** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
92command line arguments, and the EMACS_UNIBYTE environment variable, no
93longer have any effect. (They were declared obsolete in Emacs 23.)
94
95+++
96** New command line option `--no-site-lisp' removes site-lisp directories
97from load-path. -Q now implies this. This option does not affect the
98EMACSLOADPATH environment variable (and hence has no effect for
99Nextstep builds.)
100
101\f
102* Changes in Emacs 24.1
103
104+++
105** auto-mode-case-fold is now enabled by default.
106
107** Completion
108
109*** shell-mode uses pcomplete rules, with the standard completion UI.
110+++
111*** Many packages have been changed to use `completion-at-point'
112rather than their own completion code.
113+++
114*** `completion-at-point' now handles tags and semantic completion.
115---
116*** Completion in a non-minibuffer now tries to detect the end of completion
117and pops down the *Completions* buffer accordingly.
118+++
119*** Completion can cycle, depending on completion-cycle-threshold.
120+++
121*** New completion style `substring'.
122+++
123*** Completion style can be set per-category `completion-category-overrides'.
124+++
125*** Completion of buffers now uses substring completion by default.
126
127** Mail changes
128
129+++
130*** The default of `send-mail-function' is now `sendmail-query-once',
131which asks the user (once) whether to use the smtpmail package to send
132email, or to use the old defaults that rely on external mail
133facilities (`sendmail-send-it' on GNU/Linux and other Unix-like
134systems, and `mailclient-send-it' on Windows).
135
136---
137*** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
138passes it to the mail user agent function. This argument specifies an
139action for returning to the caller after finishing with the mail.
140For example, this is used by Rmail to optionally delete a mail window.
141
142*** smtpmail
143
144**** smtpmail now uses encrypted connections (via STARTTLS) if the
145mail server supports them. It also uses the auth-source framework for
146getting credentials.
147
148**** The variable `smtpmail-auth-credentials' has been removed.
149That variable used to have the default value "~/.authinfo", in which
150case you won't see any difference. But if you changed it to be a list
151of user names and passwords, that setting is now ignored; you will be
152prompted for the user name and the password, which will then be saved
153to ~/.authinfo. (To control where and how the credentials are stored,
154see the auth-source manual. You may want to change the auth-source
155preferences if you want to store the credentials encrypted, for
156instance.)
157
158You can also manually copy the credentials to your ~/.authinfo file.
159For example, if you had
160
161 (setq smtpmail-auth-credentials
162 '(("mail.example.org" 25 "jim" "s!cret")))
163
164then the equivalent line in ~/.authinfo would be
165
166 machine mail.example.org port 25 login jim password s!cret
167
168**** The variable `smtpmail-starttls-credentials' has been removed.
169
170If you had that set, then you need to put
171
172 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
173
174in your ~/.authinfo file instead.
175
176*** Mail mode changes (this is the old Mail mode, not Message mode)
177+++
178**** New command `mail-add-attachment' for adding MIME attachments
179---
180**** The command `mail-attach-file' was renamed to `mail-insert-file'.
181The old name is now an obsolete alias to the new name.
182
183+++
184*** You can type C-c m from M-x report-emacs-bug if you prefer, and if
185your system supports it, to transfer your report to your desktop's
186preferred mail client. This uses either the "xdg-email" utility, or
187OS X's "open" command.
188
189** Emacs server and client changes
190+++
191*** New option `server-port' specifies the port on which the Emacs
192server should listen.
193+++
194*** New emacsclient argument -q/--quiet suppresses some status messages.
195+++
196*** New emacsclient argument --frame-parameters can be used to set the
197frame parameters of a newly-created graphical frame.
198+++
199*** If emacsclient shuts down as a result of Emacs signaling an
200error, its exit status is 1.
201+++
202*** New emacsclient argument --parent-id ID.
203This opens a client frame in parent X window ID, via XEmbed, similar
204to the --parent-id argument to Emacs.
205
206** Internationalization changes
207
208+++
209*** Emacs now supports display and editing of bidirectional text.
210
211Text that includes characters from right-to-left (RTL) scripts, such
212as Arabic, Farsi, or Hebrew, is displayed in the correct visual order
213as expected by users of those scripts. This display reordering is a
214"Full bidirectionality" class implementation of the Unicode
215Bidirectional Algorithm. Buffers with no RTL text should look exactly
216the same as before.
217
218For more information, see the node "Bidirectional Editing" in the
219Emacs Manual.
220
221+++
222**** New buffer-local variable `bidi-display-reordering'.
223To disable display reordering in any given buffer, change this to nil.
224
225+++
226**** New buffer-local variable `bidi-paragraph-direction'.
227If nil (the default), Emacs determines the base direction of each
228paragraph from its text, as specified by the Unicode Bidirectional
229Algorithm.
230
231Setting this to `right-to-left' or `left-to-right' forces a particular
232base direction on each paragraph in the buffer.
233
234Paragraphs whose base direction is right-to-left are displayed
235starting at the right margin of the window.
236
237+++
238*** Enhanced support for characters with no glyphs in available fonts.
239If a character has no glyphs in any of the available fonts, Emacs
240normally displays it either as a hexadecimal code in a box or as a
241thin 1-pixel space. In addition to these two methods, Emacs can
242display these characters as empty box, as an acronym, or not display
243them at all. To change how these characters are displayed, customize
244the variable `glyphless-char-display-control'.
245
246On character terminals, these methods are used for characters that
247cannot be encoded by the `terminal-coding-system'.
248
249---
250*** New input methods for Farsi: farsi and farsi-translit.
251
252+++
253*** `nobreak-char-display' now also highlights Unicode hyphen chars
254(U+2010 and U+2011).
255
256---
257*** New translation of the Emacs Tutorial in Hebrew is available.
258Type `C-u C-h t' to choose it in case your language setup doesn't
259automatically select it.
260
261** Improved GTK integration
262+++
263*** GTK scroll-bars are now placed on the right by default.
264Use `set-scroll-bar-mode' to change this.
265+++
266*** GTK tool bars can have just text, just images or images and text.
267Customize `tool-bar-style' to choose style. On a Gnome desktop, the default
268is taken from the desktop settings.
269---
270*** GTK tool bars can be placed on the left/right or top/bottom of the frame.
271The frame-parameter tool-bar-position controls this. It takes the values
272top, left, right or bottom. The Options => Show/Hide menu has entries
273for this.
274+++
275*** The colors for selected text (the `region' face) are taken from
276the GTK theme when Emacs is built with GTK.
277+++
278*** Emacs uses GTK tooltips by default if built with GTK. You can turn that
279off by customizing x-gtk-use-system-tooltips.
280
281+++
282** New basic faces `error', `warning', `success' are available to
283highlight strings that indicate failure, caution or successful operation.
284
285---
286** Lucid menus and dialogs can display antialiased fonts if Emacs is built
287with Xft. To change font, use the X resource font, for example:
288Emacs.pane.menubar.font: Courier-12
289
290+++
291** On graphical displays, the mode-line no longer ends in dashes.
292Also, the first dash (which does not indicate anything) is just
293displayed as a space.
294
295+++
296** Basic SELinux support has been added.
297This requires Emacs to be linked with libselinux at build time.
298
299+++
300*** Emacs preserves the SELinux file context when backing up, and
301optionally when copying files. To this end, copy-file has an extra
302optional argument, and backup-buffer and friends include the SELinux
303context in their return values.
304
305+++
306*** The new functions file-selinux-context and set-file-selinux-context
307get and set the SELinux context of a file.
308
309** Changes for exiting Emacs
310+++
311*** The function kill-emacs is now run upon receipt of the signals
312SIGTERM and SIGHUP, and upon SIGINT in batch mode.
313+++
314*** kill-emacs-hook is now also run in batch mode.
315If you have code that adds something to kill-emacs-hook, you should
316consider if it is still appropriate to add it in the noninteractive case.
317
318** Scrolling changes
319+++
320*** New scrolling commands `scroll-up-command' and `scroll-down-command'
321(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
322of buffer at first key-press (instead move to top/bottom of buffer)
323when `scroll-error-top-bottom' is non-nil.
324+++
325*** New variable `scroll-error-top-bottom' (see above).
326+++
327*** New scrolling commands `scroll-up-line' and `scroll-down-line'
328scroll a line instead of full screen.
329+++
330*** New property `scroll-command' should be set on a command's symbol to
331define it as a scroll command affected by `scroll-preserve-screen-position'.
332+++
333*** If you customize `scroll-conservatively' to a value greater than 100,
334Emacs will never recenter point in the window when it scrolls due to
335cursor motion commands or commands that move point (e.f., `M-g M-g').
336Previously, you needed to use `most-positive-fixnum' as the value of
337`scroll-conservatively' to achieve the same effect.
338---
339*** ``Aggressive'' scrolling now honors the scroll margins.
340If you customize `scroll-up-aggressively' or
341`scroll-down-aggressively' and move point off the window, Emacs now
342scrolls the window so as to avoid positioning point inside the scroll
343margin.
344
345** Trash changes
346+++
347*** `delete-by-moving-to-trash' now only affects commands that specify
348trashing. This avoids inadvertently trashing temporary files.
349+++
350*** Calling `delete-file' or `delete-directory' with a prefix argument
351now forces true deletion, regardless of `delete-by-moving-to-trash'.
352
353+++
354** New option `list-colors-sort' defines the color sort order
355for `list-colors-display'.
356
357** An Emacs Lisp package manager is now included.
358This is a convenient way to download and install additional packages,
359from a package repository at http://elpa.gnu.org.
360+++
361*** `M-x list-packages' shows a list of packages, which can be
362selected for installation.
363+++
364*** New command `describe-package', bound to `C-h P'.
365+++
366*** By default, all installed packages are loaded and activated
367automatically when Emacs starts up. To disable this, set
368`package-enable-at-startup' to nil. To change which packages are
369loaded, customize `package-load-list'.
370
371** Custom Themes
372+++
373*** `M-x customize-themes' lists Custom themes which can be enabled.
374+++
375*** New option `custom-theme-load-path' is the load path for themes.
376Emacs no longer looks for custom themes in `load-path'. The default
377is to search in `custom-theme-directory', followed by a built-in theme
378directory named "themes/" in `data-directory'.
379+++
380*** New option `custom-safe-themes' records known-safe theme files.
381If a theme is not in this list, Emacs queries before loading it, and
382offers to save the theme to `custom-safe-themes' automatically. By
383default, all themes included in Emacs are treated as safe.
384
385** File- and directory-local variable changes
386+++
387*** You can stop directory local vars from applying to subdirectories.
388Add an element (subdirs . nil) to the alist portion of any variables
389settings to indicate that the section should not apply to
390subdirectories.
391+++
392*** Directory local variables can apply to some file-less buffers.
393Affected modes include dired, vc-dir, and log-edit. For example,
394adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
395turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
396`hack-dir-local-variables-non-file-buffer' to support this.
397+++
398*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
399Instead, use "eval: (minor-mode 1)".
400
401+++
402*** The variable `inhibit-first-line-modes-regexps' has been renamed
403to `inhibit-local-variables-regexps'. As the name suggests, it now
404applies to ALL file local variables, not just -*- mode ones.
405The associated `inhibit-first-line-modes-suffixes' has been renamed
406in the corresponding way.
407
408+++
409** The variable `focus-follows-mouse' now always defaults to nil.
410
411+++
412** New primitive `secure-hash' that supports many secure hash algorithms:
413md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
414sha1.el has been removed. The `sha1' feature is provided by default.
415
416** Menu-bar changes
417---
418*** `menu-bar-select-buffer-function' lets you choose another operation
419instead of `switch-to-buffer' when selecting an item in the Buffers menu.
420
421** Window changes
422
423+++
424*** Resizing an Emacs frame now preserves proportional window sizes,
425modulo restrictions like window minimum sizes and fixed-size windows.
426
427*** The behavior of `display-buffer' is now customizable in detail.
428+++
429**** New option `display-buffer-base-action' specifies a list of
430user-determined display "actions" (functions and optional arguments
431for choosing the displaying window).
432
433This takes precedence over the default display action, which is
434specified by `display-buffer-fallback-action'.
435
436+++
437**** New option `display-buffer-alist' maps buffer name regexps to
438display actions, taking precedence over `display-buffer-base-action'.
439
440+++
441*** New option `window-combination-limit'.
442The new option `window-combination-limit' allows to return the space
443obtained for resizing or creating a window more reliably to the window
444from which such space was obtained.
445
446+++
447*** New option `window-combination-resize'.
448The new option `window-combination-resize' allows to split a window that
449otherwise cannot be split because it's too small by stealing space from
450other windows in the same combination. Subsequent resizing or deletion
451of the window will resize all windows in the same combination as well.
452
453+++
454*** New commands `maximize-window' and `minimize-window'.
455These maximize and minimize the size of a window within its frame.
456
457+++
458*** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
459These functions allow to navigate through the live buffers that have
460been shown in a specific window.
461
462+++
463** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
464This is handy for minibuffer-only frames, and is also used for the feature
465where mouse-1 pops up *Messages*"', which can now easily be changed.
466
467\f
468* Editing Changes in Emacs 24.1
469
470** Search changes
471+++
472*** C-y in Isearch is now bound to isearch-yank-kill, instead of
473isearch-yank-line.
474+++
475*** M-y in Isearch is now bound to isearch-yank-pop, instead of
476isearch-yank-kill.
477+++
478*** M-s C-e in Isearch is now bound to isearch-yank-line.
479
480+++
481** New commands `count-words-region' and `count-words'.
482
483*** `count-lines-region' is now an alias for `count-words-region',
484bound to M-=, which shows the number of lines, words, and characters.
485
486+++
487** The default value of `backup-by-copying-when-mismatch' is now t.
488
489+++
490** The command `just-one-space' (M-SPC), if given a negative argument,
491also deletes newlines around point.
492
493** Deletion changes
494+++
495*** New option `delete-active-region'.
496If non-nil, [delete] and DEL delete the region if it is active and no
497prefix argument is given. If set to `kill', these commands kill
498instead.
499+++
500*** New command `delete-forward-char', bound to [delete].
501This is meant for interactive use, and obeys `delete-active-region'.
502The command `delete-char' does not obey `delete-active-region'.
503---
504*** `delete-backward-char' is now a Lisp function.
505Apart from obeying `delete-active-region', its behavior is unchanged.
506However, the byte compiler now warns if it is called from Lisp; you
507should use delete-char with a negative argument instead.
508---
509*** The option `mouse-region-delete-keys' has been deleted.
510
511** Selection changes.
512
513The default handling of clipboard and primary selections was changed
514to conform with modern X applications. In short, most commands for
515killing and yanking text now use the clipboard, while mouse commands
516use the primary selection.
517
518In the following, we provide a list of these changes, followed by a
519list of steps to get the old behavior back if you prefer that.
520
521+++
522*** `select-active-regions' now defaults to t.
523Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
524the kill ring. The selected text is put in the primary selection, if
525the system possesses a separate primary selection facility (e.g. X).
526
527+++
528**** `select-active-regions' also accepts a new value, `only'.
529This means to only set the primary selection for temporarily active
530regions (usually made by mouse-dragging or shift-selection);
531"ordinary" active regions, such as those made with C-SPC followed by
532point motion, do not alter the primary selection.
533
534---
535**** `mouse-drag-copy-region' now defaults to nil.
536
537+++
538*** mouse-2 is now bound to `mouse-yank-primary'.
539This pastes from the primary selection, ignoring the kill-ring.
540Previously, mouse-2 was bound to `mouse-yank-at-click'.
541
542+++
543*** `x-select-enable-clipboard' now defaults to t on all platforms.
544+++
545*** `x-select-enable-primary' now defaults to nil.
546Thus, commands that kill text or copy it to the kill-ring (such as
547M-w, C-w, and C-k) also use the clipboard---not the primary selection.
548
549---
550**** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
551exactly equivalent to, respectively M-w, C-w, and C-y.
552
553---
554**** Note that on MS-Windows, `x-select-enable-clipboard' was already
555non-nil by default, as Windows does not support the primary selection
556between applications.
557
558---
559*** To return to the previous behavior, do the following:
560**** Change `select-active-regions' to nil.
561**** Change `mouse-drag-copy-region' to t.
562**** Change `x-select-enable-primary' to t (on X only).
563**** Change `x-select-enable-clipboard' to nil.
564**** Bind `mouse-yank-at-click' to mouse-2.
565
566+++
567*** Support for X cut buffers has been removed.
568
569*** X clipboard managers are now supported.
570To inhibit this, change `x-select-enable-clipboard-manager' to nil.
571
572+++
573** New command `rectangle-number-lines', bound to `C-x r N', numbers
574the lines in the current rectangle. With a prefix argument, this
575prompts for a number to count from and for a format string.
576
577+++
578** The default value of redisplay-dont-pause is now t
579This makes Emacs feel more responsive to editing commands that arrive
580at high rate, e.g. if you lean on some key, because stopping redisplay
581in the middle (when this variable is nil) forces more expensive
582updates later on, and Emacs appears to be unable to keep up.
583
584+++
585** The behavior of <TAB> for active regions in Text mode has changed.
586In Text and related modes, typing <TAB> (`indent-for-tab-command')
587when the region is active causes Emacs to indent all the lines in the
588region, aligning them with the line previous to the first line in the
589region (or with the left margin if there is no previous line).
590
591\f
592* Changes in Specialized Modes and Packages in Emacs 24.1
593
594+++
595** Archive Mode has basic support for browsing and updating 7z archives.
596
597** BibTeX mode
598---
599*** BibTeX mode now supports biblatex.
600Use the variable bibtex-dialect to select different BibTeX dialects.
601bibtex-entry-field-alist is now an obsolete alias forbibtex-BibTeX-entry-alist.
602---
603*** New command `bibtex-search-entries' bound to C-c C-a.
604---
605*** New `bibtex-entry-format' option `sort-fields', disabled by default.
606---
607*** New variable `bibtex-search-entry-globally'.
608
609** Calendar, Diary, and Appt
610
611+++
612*** Diary entries can contain non-printing `comments'.
613See the variable `diary-comment-start'.
614
615+++
616*** Appointments can specify their individual warning times.
617See the variable `appt-warning-time-regexp'.
618
619---
620*** The function specified by `appt-disp-window-function' may be passed
621lists of arguments if multiple appointments are due at similar times.
622If you are using a custom function for this, you should update it.
623
624+++
625*** New function `diary-hebrew-birthday'.
626
627---
628*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
629may no longer be nil, but must all be strings.
630
631---
632*** The obsolete (since Emacs 22.1) method of enabling the appt package
633by adding appt-make-list to diary-hook has been removed. Use appt-activate.
634
635---
636*** Some appt variables (obsolete since Emacs 22.1) have been removed:
637appt-issue-message (use the function appt-activate)
638appt-visible/appt-msg-window (use the variable appt-display-format)
639
640---
641*** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
642view-diary-entries, list-diary-entries, show-all-diary-entries
643
644** Browse-url
645
646+++
647*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
648
649---
650*** The default browser used by the package is now the "xdg-open" program,
651on platforms that support it. This calls your desktop's preferred browser.
652
653+++
654** New CC Mode feature to "guess" the style in an existing buffer.
655The main entry is M-x c-guess.
656
657** comint and modes derived from it use the generic completion code.
658
659** Compilation mode
660---
661*** Compilation mode can be used without font-lock-mode.
662`compilation-parse-errors-function' is now obsolete.
663
664---
665*** New variable `compilation-filter-start', bound while
666compilation-filter-hook runs. It records the start position of the
667text inserted by compilation-filter.
668
669---
670*** `compilation-error-screen-columns' and `compilation-first-column'
671are obeyed in the editing buffer. So programming language modes can
672set them, whereas previously only the value in the *compilation* buffer
673was used.
674
675** Customize
676
677+++
678*** Customize buffers now contain a search field.
679The search is performed using `customize-apropos'.
680To turn off the search field, set custom-search-field to nil.
681
682+++
683*** Custom options now start out hidden if at their default values.
684Use the arrow to the left of the option name to toggle visibility.
685
686---
687*** custom-buffer-sort-alphabetically now defaults to t.
688
689+++
690*** The color widget now has a "Choose" button, which allows you to
691choose a color via list-colors-display.
692
693** D-Bus
694
695*** It is now possible to access buses other than the default system
696or session bus.
697
698*** The dbus-register-method and dbus-register-property functions
699optionally do not register names.
700
701*** The new function dbus-register-service registers a known service name
702on a D-Bus without simultaneously registering a property or a method.
703
704** Dired-x
705---
706*** dired-jump and dired-jump-other-window called with a prefix argument
707read a file name from the minibuffer instead of using buffer-file-name.
708
709+++
710*** The `dired local variables' feature provided by Dired-x is obsolete.
711The standard directory local variables feature replaces it.
712
713** ERC changes
714
715---
716*** New options `erc-autojoin-timing' and `erc-autojoin-delay',
717controlling attempts to autojoin a channel.
718
719*** New variable `erc-coding-system-precedence': If we use `undecided'
720as the server coding system, this variable will then be consulted.
721The default is to decode strings that can be decoded as utf-8 as
722utf-8, and do the normal `undecided' decoding for the rest.
723
724** Eshell changes
725
726---
727*** The default value of `eshell-directory-name' has changed
728to be an "eshell" directory in `user-emacs-directory'.
729The old "~/.eshell/" directory is still used if it exists, though.
730
731** gdb-mi
732+++
733*** The GDB User Interface has been migrated to GDB Machine Interface.
734It now supports multithread non-stop debugging and simultaneous
735debugging of several threads.
736
737** Image mode
738
739+++
740*** RET (`image-toggle-animation') toggles animation, if applicable.
741Animation plays once, unless the option `image-animate-loop' is non-nil.
742
743** Info
744
745+++
746*** New command `info-display-manual' displays a named Info manual.
747If that manual is already visited in some Info buffer, it displays
748that buffer. (This is handy if you have many manuals in many *info*
749buffers, and don't remember the name of the buffer visiting the manual
750you want to consult.) Otherwise, it loads and displays the manual.
751
752+++
753*** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
754This is for compatibility with the stand-alone Info reader program,
755and also because `Info-edit' is a rarely used command that is disabled
756by default.
757
758+++
759** MH-E has been upgraded to MH-E version 8.3.1.
760See MH-E-NEWS for details.
761
762---
763** Modula-2 mode provides auto-indentation.
764
765---
766** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
767
768---
769** Prolog mode has been completely revamped, with lots of additional
770functionality such as more intelligent indentation, electricity, support for
771more variants, including Mercury, and a lot more.
772
773** Rmail
774
775+++
776*** The command `rmail-epa-decrypt' decrypts OpenPGP data
777in the Rmail incoming message.
778
779---
780*** The variable `rmail-message-filter' no longer has any effect.
781This change was made in Emacs 23.1 but was not advertised at the time.
782Try using `rmail-show-message-hook' instead.
783
784** Shell mode
785+++
786*** Shell mode uses pcomplete rules, with the standard completion UI.
787+++
788*** The `shell' command prompts for the shell path name if the default
789directory is a remote file name and neither the environment variable
790$ESHELL nor the variable `explicit-shell-file-name' is set.
791
792---
793** SQL mode
794
795---
796*** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
797and `sql-oracle-scan-on'.
798
799---
800*** New custom variables control prompting for login parameters.
801Each supported product has a custom variable `sql-*-login-params',
802which is a list of the parameters to be prompted for before a
803connection is established.
804
805---
806*** The command `sql-product-interactive' now takes a prefix argument,
807which causes it to prompt for an SQL product.
808
809---
810*** Product-specific SQL interactive commands now take prefix arguments.
811These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
812given a prefix argument, prompt for a name for the SQL interactive
813buffer. This reduces the need for calling `sql-rename-buffer'.
814
815---
816*** SQL interactive modes suppress command continuation prompts, and
817replace tabs with spaces. The first change impacts multiple line SQL
818statements entered with C-j between each line, statements yanked into
819the buffer and statements sent with `sql-send-*' functions. The
820second prevents the MySQL and Postgres interpreters from listing
821object name completions when sent text via `sql-send-*' functions.
822
823---
824*** New command `sql-connect' starts a predefined SQLi session,
825using the login parameters from `sql-connection-alist'.
826
827---
828*** New "Save Connection" menu item in SQLi buffers.
829This gathers the login params specified for the SQLi session, if it
830was not started by a connection, and saves them as a new connection.
831
832---
833*** New commands for listing database objects and details:
834sql-list-all and sql-list-table.
835
836---
837*** An API for manipulating SQL product definitions has been added.
838
839** TeX modes
840
841+++
842*** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
843
844** Tramp
845---
846*** There exists a new inline access method "ksu" (kerberized su).
847---
848*** The following access methods are discontinued: "ssh1_old",
849"ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
850+++
851*** The user option `remote-file-name-inhibit-cache' controls whether
852remote file attributes are cached for better performance.
853---
854*** The option `ange-ftp-binary-file-name-regexp' has changed its
855default value to "".
856---
857*** Handlers for file-selinux-context and set-file-selinux-context for
858remote machines that support SELinux.
859
860+++
861** New function, url-queue-retrieve, fetches URLs asynchronously like
862url-retrieve does, but in parallel.
863
864** VC and related modes
865
866+++
867*** Support for pulling on distributed version control systems.
868`C-x v +' (`vc-pull') runs a "pull" operation, if it is supported
869(currently with Bzr, Git, and Mercurial), to update the current branch
870and working tree. A prefix argument means to prompt the user for
871specifics, e.g. a pull location.
872
873---
874*** `vc-update' is now an alias for `vc-pull'.
875
876+++
877*** Support for merging on distributed version control systems.
878The vc-merge command now runs a "merge" operation, if it is supported
879(currently with Bzr, Git, and Mercurial), to merge changes from
880another branch into the current one. It prompts for specifics, e.g. a
881merge source.
882
883+++
884*** New option `vc-revert-show-diff' controls whether `vc-revert'
885shows a diff while querying the user. It defaults to t.
886
887+++
888*** Log entries in some Log View buffers can be toggled to display a
889longer description by typing RET (log-view-toggle-entry-display).
890This is currently supported for Bzr, Git, and Mercurial (to support
891another backend, define a `log-view-expanded-log-entry-function').
892In the Log View buffers made by `C-x v L' (vc-print-root-log), you can
893use this to display the full log entry for the revision at point.
894
895+++
896*** New command `vc-ediff' allows visual comparison of two revisions
897of a file similar to `vc-diff', but using ediff backend.
898
899+++
900*** The option `vc-initial-comment' was removed in Emacs 23.2, but
901this was not advertised at the time.
902
903+++
904*** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
905Since Emacs 23, it has done the same thing as `toggle-read-only', but
906this was not advertised at the time.
907
908** Obsolete modes
909
910---
911*** abbrevlist.el
912
913---
914*** erc-hecomplete.el (use erc-pcomplete.el instead)
915
916*** partial-completion-mode (complete.el) is obsolete.
917You can get a comparable behavior with:
918(setq completion-styles '(partial-completion initials))
919(setq completion-pcm-complete-word-inserts-delimiters t)
920
921---
922*** pc-mode.el is obsolete (CUA mode is much more comprehensive).
923
924[FIXME gnus.texi, message.texi need updating]
925*** pgg is obsolete (use EasyPG instead)
926
927---
928*** sregex.el is obsolete, since rx.el is a strict superset.
929
930---
931*** s-region.el and pc-select.el are obsolete.
932They are superseded by shift-select-mode, enabled by default since 23.1.
933
934+++
935*** vc-mcvs.el is obsolete (for lack of a maintainer)
936
937** Miscellaneous
938
939+++
940*** The Landmark game is now invoked with `landmark', not `lm'.
941
942---
943*** In `ido-file-completion-map', C-v is no longer bound to ido-toggle-vc.
944(This interfered with cua-mode.)
945
946+++
947*** f90.el has some support for Fortran 2008 syntax.
948
949---
950*** `copyright-fix-years' can optionally convert consecutive years to ranges.
951
952+++
953*** New command `nato-region' converts text to NATO phonetic alphabet.
954
955\f
956* New Modes and Packages in Emacs 24.1
957
958+++
959** Occur Edit mode applies edits made in *Occur* buffers to the
960original buffers. It is bound to "e" in Occur mode.
961
962+++
963** New global minor mode electric-pair-mode.
964When enabled, typing an open parenthesis automatically inserts the
965matching closing one.
966
967+++
968** New global minor mode electric-indent-mode.
969When enabled, typing certain characters triggers reindentation.
970Major modes wishing to use this can set electric-indent-chars or
971electric-indent-functions.
972
973+++
974** New global minor mode electric-layout-mode.
975When enabled, typing certain characters automatically inserts newlines.
976Major modes wishing to use this can set electric-layout-rules.
977
978+++
979** tabulated-list.el provides a generic major mode for tabulated data,
980from which other modes can be derived.
981
982** pcase.el provides the ML-style pattern matching macro `pcase'.
983
984** secrets.el is an implementation of the Secret Service API, an
985interface to password managers like GNOME Keyring or KDE Wallet. The
986Secret Service API requires D-Bus for communication. The command
987`secrets-show-secrets' offers a buffer with a visualization of the
988secrets.
989
990** notifications.el provides an implementation of the Desktop
991Notifications API. It requires D-Bus for communication.
992
993** soap-client.el supports access to SOAP web services from Emacs.
994soap-inspect.el is an interactive inspector for SOAP WSDL structures.
995
996---
997** New generic mode, xmodmap-generic-mode, for xmodmap files.
998
999---
1000** New emacs-lock.el package.
1001(The previous version has been moved to obsolete/old-emacs-lock.el.)
1002Now, there is a proper minor mode `emacs-lock-mode'.
1003Protection against exiting Emacs and killing the buffer can be set
1004separately. The mechanism for automatically turning off protection
1005for buffers with dead inferior processes has been generalized.
1006
1007\f
1008* Incompatible Lisp Changes in Emacs 24.1
1009
1010---
1011** `char-direction-table' and the associated function `char-direction'
1012were deleted. They were buggy and inferior to the new support of
1013bidirectional editing introduced in Emacs 24. If you need the
1014bidirectional properties of a character, use `get-char-code-property'
1015with the last argument `bidi-class'.
1016
1017+++
1018** `copy-directory' now copies the source directory as a subdirectory
1019of the target directory, if the latter is an existing directory. The
1020new optional arg COPY-CONTENTS, if non-nil, makes the function copy
1021the contents directly into a pre-existing target directory.
1022
1023+++
1024** For mouse click input events in the text area, the Y pixel
1025coordinate in the POSITION list now counts from the top of the text
1026area, excluding any header line. Previously, it counted from the top
1027of the header line.
1028
1029---
1030** Support for "old-style" backquotes, which have been obsolete for
1031more than 10 years, has been further reduced. Now a backquote not
1032followed by a space is always treated as a "new-style" backquote.
1033Please consider completely removing all "old-style" backquotes from
1034your code as a matter of some urgency. If your code uses backquotes
1035as documented in the Elisp manual, and compiles without warning, then
1036you have nothing to do in this regard. Code not following the
1037appropriate conventions may fail to compile. The most common cause of
1038trouble seems to be an old-style backquote followed by a newline.
1039
1040---
1041** view-buffer now treats special mode-class in the same way that
1042view-file has since Emacs 22 (ie, it won't enable View mode if the
1043major-mode is special).
1044
1045+++
1046** Passing a nil argument to a minor mode defined by define-minor-mode
1047now turns the mode ON unconditionally. This is so that you can write, e.g.
1048 (add-hook 'text-mode-hook 'foo-minor-mode)
1049to enable foo-minor-mode in Text mode buffers, thus removing the need
1050for `turn-on-foo-minor-mode' style functions.
1051
1052+++
1053** During startup, Emacs no longer adds entries for `menu-bar-lines'
1054and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
1055With these alist entries omitted, `make-frame' checks the value of the
1056variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
1057a menu-bar or tool-bar, respectively. If the alist entries are added,
1058they override the value of `menu-bar-mode'/`tool-bar-mode'.
1059
1060+++
1061** Regions created by mouse dragging are now normal active regions,
1062similar to the ones created by shift-selection. In previous Emacs
1063versions, these regions were delineated by `mouse-drag-overlay', which
1064has now been removed.
1065
1066+++
1067** The fourth argument of filter-buffer-substring, which says to remove
1068text properties from the final result, has been removed.
1069Eg simply pass the result through substring-no-properties if you need this.
1070
1071---
1072** cl.el no longer provides `cl-19'.
1073
1074** The menu bar bindings's caches are not used any more.
1075Use (where-is-internal <def> nil t) instead.
1076
1077+++
1078** The following obsolete (mostly since at least 21.1) functions and aliases
1079have been removed (the appropriate new function is given in parentheses):
1080comint-kill-output (comint-delete-output),
1081decompose-composite-char (char-to-string),
1082outline-visible (outline-invisible-p),
1083internal-find-face (facep), internal-get-face (facep and check-face),
1084frame-update-faces (not needed),
1085frame-update-face-colors (frame-set-background-mode),
1086x-frob-font-weight and x-frob-font-slant (appropriate make-face-* function),
1087x-make-font-bold and x-make-font-demibold (make-face-bold),
1088x-make-font-italic and x-make-font-oblique (make-face-italic),
1089x-make-font-bold-italic (make-face-bold-italic),
1090x-make-font-unbold (make-face-unbold),
1091x-make-font-unitalic (make-face-unitalic),
1092mldrag-drag-mode-line (mouse-drag-mode-line),
1093mldrag-drag-vertical-line (mouse-drag-vertical-line),
1094iswitchb-default-keybindings (iswitchb-mode), char-bytes (== 1),
1095isearch-return-char (isearch-printing-char), make-local-hook (not needed)
1096
1097+++
1098** The following obsolete (mostly since at least 21.1) variables and varaliases
1099have been removed (the appropriate new variable is given in parentheses):
1100checkdoc-minor-keymap (checkdoc-minor-mode-map),
1101vc-header-alist (vc-BACKEND-header), directory-sep-char (== ?/)
1102font-lock-defaults-alist (font-lock-defaults), and e (float-e).
1103
1104---
1105** The following obsolete files were removed:
1106sc.el, x-menu.el, rnews.el, rnewspost.el
1107
1108** FIXME finder-inf.el changes.
1109
1110\f
1111* Lisp changes in Emacs 24.1
1112
1113+++
1114** Code can now use lexical scoping by default instead of dynamic scoping.
1115The `lexical-binding' variable lets code use lexical scoping for local
1116variables. It is typically set via a file-local variable in the first
1117line of the file, in which case it applies to all the code in that file.
1118+++
1119*** `eval' takes a new optional argument `lexical' to choose the new lexical
1120binding instead of the old dynamic binding mode.
1121+++
1122*** Lexically scoped interpreted functions are represented with a new form
1123of function value which looks like (closure ENV ARGS &rest BODY).
1124
1125*** New macro `letrec' to define recursive local functions.
1126+++
1127*** New function `special-variable-p' to check whether a variable is
1128declared as dynamically bound.
1129
1130+++
1131** An Emacs Lisp testing tool is now included.
1132Emacs Lisp developers can use this tool to write automated tests for
1133their code. See the ERT info manual for details.
1134
1135** Changes for bidirectional display and editing
1136
1137+++
1138*** New function `current-bidi-paragraph-direction'.
1139This returns the actual value of base direction of the paragraph at
1140point.
1141
1142+++
1143*** New function `bidi-string-mark-left-to-right'.
1144Given a string containing characters from right-to-left (RTL) scripts,
1145this function returns another string which can be safely inserted into
1146a buffer, such that any following text will be always displayed to the
1147right of that string. (This works by appending the Unicode
1148"LEFT-TO-RIGHT MARK" character when the argument string might need that.)
1149
1150This is useful when the buffer has overall left-to-right (LTR)
1151paragraph direction and you need to insert a string whose contents and
1152directionality are not known in advance, without disrupting the layout
1153of the line.
1154
1155** Window changes
1156+++
1157*** Window tree functions are accessible in Elisp.
1158Functions are provided to return the parent, siblings or child windows
1159of any window including internal windows (windows not associated with a
1160buffer) in the window tree.
1161+++
1162**** New function `window-valid-p' gives non-nil for live and internal
1163windows.
1164+++
1165**** Window manipulation can deal with internal windows.
1166Many window handling functions like `split-window', `delete-window', or
1167`delete-other-windows' as well as the window resizing functions can now
1168act on any window including internal ones.
1169+++
1170*** window-total-height/-width vs window-body-height/-width.
1171The function `window-height' has been renamed to `window-total-height'
1172and `window-width' has been renamed to `window-body-width'. The old
1173names are provided as aliases. Two new functions `window-total-width'
1174and `window-body-height' are provided.
1175+++
1176*** Window parameters specific to window handling functions.
1177For each window you can specify a parameter to override the default
1178behavior of a number of functions like `split-window', `delete-window'
1179and `delete-other-windows'. The variable `ignore-window-parameters'
1180allows to ignore processing such parameters.
1181+++
1182*** New semantics of third argument of `split-window'.
1183The third argument of `split-window' has been renamed to SIDE and can be
1184set to any of the values 'below, 'right, 'above, or 'left to make the
1185new window appear on the corresponding side of the window that shall be
1186split. Any other value of SIDE will cause `split-window' to split the
1187window into two side-by-side windows as before.
1188+++
1189*** Window resizing functions.
1190A new standard function for resizing windows called `window-resize' has
1191been introduced. This and all other functions for resizing windows no
1192longer delete any windows when they become too small.
1193+++
1194*** Deleting the selected window now selects the most recently selected
1195live window on that frame instead.
1196+++
1197*** `adjust-window-trailing-edge' adjustments.
1198`adjust-window-trailing-edge' can now deal with fixed-size windows and
1199is able to resize other windows if a window adjacent to the trailing
1200edge cannot be shrunk any more. This makes its behavior more similar to
1201that of Emacs 21 without compromising, however, its inability to delete
1202windows which was introduced in Emacs 22.
1203+++
1204*** Window-local buffer lists.
1205Windows now have local buffer lists. This means that removing a buffer
1206from display in a window will preferably show the buffer previously
1207shown in that window with its previous window-start and window-point
1208positions. This also means that the same buffer may be automatically
1209shown twice even if it already appears in another window.
1210+++
1211*** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
1212which if non-nil requires the buffer to be displayed in the currently
1213selected window, signaling an error otherwise. If nil, another window
1214can be used, e.g. if the selected one is strongly dedicated.
1215+++
1216*** `split-window-vertically' and `split-window-horizontally' renamed
1217to `split-window-below' and `split-window-right' respectively.
1218The old names are kept as aliases.
1219+++
1220*** Display actions
1221
1222**** The second arg to `display-buffer' and `pop-to-buffer' is now
1223named ACTION, and takes a display action of the same form as
1224`display-buffer-base-action' (see Changes, above). A non-nil,
1225non-list value is treated specially, as the old meaning.
1226
1227**** New variable `display-buffer-overriding-action'.
1228
1229**** The procedure of `display-buffer' etc. to choose a window is
1230determined by combining `display-buffer-overriding-action',
1231`display-buffer-alist', the ACTION arg, `display-buffer-base-action',
1232and `display-buffer-fallback-action'. The second and fourth of these
1233are user-customizable variables.
1234
1235See the docstring of `display-buffer' for details.
1236
1237+++
1238*** New behavior of `quit-window'.
1239The behavior of `quit-window' has been changed in order to restore the
1240state before the last buffer display operation in that window.
1241
1242+++
1243*** The new option `frame-auto-hide-function' lets you choose between
1244iconifying or deleting a frame when burying a buffer shown in a dedicated
1245frame or quitting a window showing a buffer in a frame of its own.
1246
1247+++
1248*** New functions `window-state-get' and `window-state-put'.
1249These functions allow to save and restore the state of an arbitrary
1250frame or window as an Elisp object.
1251
1252** Completion
1253
1254*** New variable completion-extra-properties used to specify extra properties
1255of the current completion:
1256- :annotate-function, same as the old completion-annotate-function.
1257- :exit-function, function to call after completion took place.
1258
1259*** Functions on completion-at-point-functions can return any of the properties
1260valid for completion-extra-properties.
1261
1262*** completion-annotate-function is obsolete.
1263
1264*** New `metadata' method for completion tables. The metadata thus returned
1265can specify various details of the data returned by `all-completions':
1266- `category' is the kind of objects returned (e.g., `buffer', `file', ...),
1267 used to select a style in completion-category-overrides.
1268- `annotation-function' to add annotations in *Completions*.
1269- `display-sort-function' to specify how to sort entries in *Completions*.
1270- `cycle-sort-function' to specify how to sort entries when cycling.
1271
1272*** minibuffer-local-filename-must-match-map is not used any more.
1273Instead, the bindings in minibuffer-local-filename-completion-map are
1274combined with minibuffer-local-must-match-map.
1275
1276*** New variable `completing-read-function' allows overriding the
1277behavior of `completing-read'.
1278
1279+++
1280** `glyphless-char-display' can now distinguish between graphical and
1281text terminal display, via a char-table entry that is a cons cell.
1282
1283** `open-network-stream' can now be used to open an encrypted stream.
1284It now accepts an optional `:type' parameter for initiating a TLS
1285connection, directly or via STARTTLS. To do STARTTLS, additional
1286parameters (`:end-of-command', `:success', `:capabilities-command')
1287must also be supplied.
1288
1289+++
1290** pre/post-command-hook are not reset to nil upon error.
1291Instead, the offending function is removed.
1292
1293** New hook types
1294
1295+++
1296*** New function `run-hook-wrapped' for running an abnormal hook by
1297passing the hook functions as arguments to a "wrapping" function.
1298Like `run-hook-with-args-until-success', it stops at the first
1299non-nil return value.
1300
1301+++
1302*** New macro `with-wrapper-hook' for running an abnormal hook as a
1303set of "wrapping" filters, similar to around advice.
1304(A version of this macro was actually added in Emacs 23.2 but was not
1305advertised at the time.)
1306
1307+++
1308** The macros `condition-case-no-debug' and `with-demoted-errors' were
1309added in Emacs 23.1, but not advertised.
1310
1311+++
1312** The new function `server-eval-at' allows evaluation of Lisp forms on
1313named Emacs server instances, using TCP sockets.
1314
1315+++
1316** `call-process' and `call-process-region' allow a `(:file "file")' spec
1317to redirect STDOUT to a file.
1318
1319---
1320** Variable `stack-trace-on-error' removed.
1321Also the debugger can now "continue" from an error, which means it will jump
1322to the error handler as if the debugger had not been invoked instead of
1323jumping all the way to the top-level.
1324
1325+++
1326** The function format-time-string now supports the %N directive, for
1327higher-resolution time stamps.
1328
1329+++
1330** New function `read-char-choice' reads a restricted set of characters,
1331discarding any inputs not inside the set.
1332
1333+++
1334** `image-library-alist' is renamed to `dynamic-library-alist'.
1335The variable is now used to load all kind of supported dynamic libraries,
1336not just image libraries. The previous name is still available as an
1337obsolete alias.
1338
1339** New variable `syntax-propertize-function'.
1340This replaces `font-lock-syntactic-keywords' which is now obsolete.
1341This allows syntax-table properties to be set independently from font-lock:
1342just call syntax-propertize to make sure the text is propertized.
1343Together with this new variable come a new hook
1344syntax-propertize-extend-region-functions, as well as two helper functions:
1345syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
1346as-is; and syntax-propertize-rules which provides a new way to specify
1347syntactic rules.
1348
1349+++
1350** New hook post-self-insert-hook run at the end of self-insert-command.
1351
1352+++
1353** Syntax tables support a new "comment style c" additionally to style b.
1354
1355---
1356** frame-local variables cannot be let-bound any more.
1357
1358** Major and minor mode changes
1359+++
1360*** `prog-mode' is a new major mode from which programming modes
1361should be derived.
1362
1363+++
1364**** `prog-mode-hook' can be used to enable features for programming
1365modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
1366on-the-fly spell checking for comments and strings.
1367
1368+++
1369*** New hook `change-major-mode-after-body-hook', run by
1370`run-mode-hooks' just before any other mode hooks.
1371
1372+++
1373*** Enabled globalized minor modes can be disabled in specific major modes.
1374If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
1375major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
1376
1377+++
1378*** `define-minor-mode' accepts a new keyword :variable.
1379
1380+++
1381** `delete-file' and `delete-directory' now accept optional arg TRASH.
1382Trashing is performed if TRASH and `delete-by-moving-to-trash' are
1383both non-nil. Interactively, TRASH defaults to t, unless a prefix
1384argument is supplied (see Trash changes, above).
1385
1386---
1387** `facemenu-read-color' is now an alias for `read-color'.
1388
1389+++
1390** The command `read-color' now requires a match for a color name
1391or RGB triplet, instead of signaling an error if the user provides
1392invalid input.
1393
1394+++
1395** Tool-bars can display separators.
1396Tool-bar separators are handled like menu separators in menu-bar maps,
1397i.e. via menu entries of the form `(menu-item "--")'.
1398
1399** Image API
1400
1401+++
1402*** Animated images support (currently animated gifs only).
1403
1404+++
1405**** `image-animated-p' returns non-nil if an image can be animated.
1406
1407+++
1408**** `image-animate' animates a supplied image spec.
1409
1410+++
1411**** `image-animate-timer' returns the timer object for an image that
1412is being animated.
1413
1414---
1415*** `image-extension-data' has been renamed to `image-metadata'.
1416The old name is an obsolete alias to the new one.
1417
1418+++
1419*** Image mode can view any image type that ImageMagick supports.
1420This requires Emacs to be built with ImageMagick support.
1421Then the function `imagemagick-types' returns a list of image file
1422extensions that your installation of ImageMagick supports. The
1423function `imagemagick-register-types' enables ImageMagick support for
1424these image types, minus those listed in `imagemagick-types-inhibit'.
1425Visiting one of these file types will then use Image mode.
1426
1427---
1428*** New commands to resize and rotate images in Image mode.
1429These require Emacs to be built with ImageMagick support.
1430image-transform-fit-to-height, image-transform-fit-to-width,
1431image-transform-set-rotation, image-transform-set-scale.
1432
1433** XML and HTML parsing
1434If Emacs is compiled with libxml2 support, there are two new functions:
1435`libxml-parse-html-region' (which parses "real world" HTML) and
1436`libxml-parse-xml-region' (which parses XML). Both return an Emacs
1437Lisp parse tree.
1438
1439FIXME: These should be front-ended by xml.el.
1440
1441** GnuTLS
1442
1443*** New library `gnutls.el'.
1444This requires Emacs to have been built with GnuTLS support.
1445The main functions are `open-gnutls-stream' and `gnutls-negotiate'.
1446It's easiest to use these functions through `open-network-stream'
1447because it can upgrade connections through STARTTLS opportunistically
1448or use plain SSL, depending on your needs. For debugging, set
1449`gnutls-log-level' greater than 0.
1450
1451** Isearch
1452
1453---
1454*** New hook `isearch-update-post-hook' that runs in `isearch-update'.
1455
1456+++
1457** Progress reporters can now "spin".
1458The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
1459now be nil, or omitted. This makes a "non-numeric" reporter. Each
1460time you call `progress-reporter-update' on that progress reporter,
1461with a nil or omitted VALUE argument, the reporter message is
1462displayed with a "spinning bar".
1463
1464+++
1465** New variable `revert-buffer-in-progress-p' is true while a buffer is
1466being reverted, even if the buffer has a local `revert-buffer-function'.
1467
1468---
1469** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
1470If delayed-warnings-list is non-nil, the command loop calls
1471delayed-warnings-hook after post-command-hook. At present, this is
1472only used by Emacs on some platforms to display warnings during
1473startup, which might otherwise not be noticed. This uses the functions
1474display-delayed-warnings and collapse-delayed-warnings.
1475
1476
1477+++
1478** `set-auto-mode' now respects mode: local variables at the end of files,
1479as well as those in the -*- line.
1480
1481---
1482** rx.el has a new `group-n' construct for explicitly numbered groups.
1483
1484+++
1485** New function `make-composed-keymap' that constructs a new keymap
1486from multiple input maps. You can use this to make a keymap that
1487inherits from multiple maps, eg:
1488 (set-keymap-parent newmap (make-composed-keymap othermap parent))
1489
1490+++
1491** Set `debug-on-event' to make Emacs enter the debugger e.g. on receipt
1492of SIGUSR1. This can be useful when `inhibit-quit' is set.
1493
1494+++
1495** New reader macro ## that stands for the empty symbol.
1496This means that the empty symbol can now be read back. Also, #: by itself
1497(when not immediately followed by a possible symbol character) stands for
1498an empty uninterned symbol.
1499
1500+++
1501** New math functions `isnan', `copysign', `frexp', `ldexp'.
1502
1503** Obsolete functions and variables
1504
1505---
1506*** `tooltip-use-echo-area' is obsolete.
1507Rather than setting this to t, disable Tooltip mode instead.
1508
1509+++
1510*** buffer-substring-filters is obsolete.
1511Use `filter-buffer-substring-functions' instead.
1512
1513---
1514*** `byte-compile-disable-print-circle' is obsolete.
1515
1516---
1517*** `deferred-action-list' and `deferred-action-function' are obsolete.
1518Use `post-command-hook' instead.
1519
1520+++
1521*** `font-lock-maximum-size' is obsolete.
1522
1523\f
1524* Changes in Emacs 24.1 on non-free operating systems
1525
1526---
1527** On MS Windows, Emacs warns when using the obsolete init file _emacs,
1528and also when HOME is set to C:\ by default.
1529
1530** New configure.bat options
1531
1532+++
1533*** --enable-checking builds Emacs with extra runtime checks.
1534
1535+++
1536*** --distfiles specifies files to be included in binary distribution.
1537
1538+++
1539*** --without-gnutls disables automatic GnuTLS detection.
1540
1541+++
1542*** --lib for general library linkage, works with the USER_LIBS build variable.
1543
1544+++
1545** New make target `dist' to create binary distribution for MS Windows.
1546
1547---
1548** The Lisp function `w32-default-color-map' is now obsolete.
1549(It is only used internally in the Emacs C code.)
1550
1551+++
1552** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
1553reappear on mouse-over. (Requires OS X 10.6 or later.)
1554
1555\f
1556----------------------------------------------------------------------
1557This file is part of GNU Emacs.
1558
1559GNU Emacs is free software: you can redistribute it and/or modify
1560it under the terms of the GNU General Public License as published by
1561the Free Software Foundation, either version 3 of the License, or
1562(at your option) any later version.
1563
1564GNU Emacs is distributed in the hope that it will be useful,
1565but WITHOUT ANY WARRANTY; without even the implied warranty of
1566MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1567GNU General Public License for more details.
1568
1569You should have received a copy of the GNU General Public License
1570along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1571
1572\f
1573Local variables:
1574mode: outline
1575paragraph-separate: "[ \f]*$"
1576end: