NEWS 24.9 KB
Newer Older
1
GNU Emacs NEWS -- history of user-visible changes.
2

Paul Eggert's avatar
Paul Eggert committed
3
Copyright (C) 2014-2015 Free Software Foundation, Inc.
4
See the end of the file for license conditions.
Dave Love's avatar
#  
Dave Love committed
5

6
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7 8
If possible, use M-x report-emacs-bug.

9
This file is about changes in Emacs version 25.
10

11
See files NEWS.24, 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 15

You can narrow news to a specific version by calling `view-emacs-news'
with a prefix argument or by typing C-u C-h C-n.
16

Glenn Morris's avatar
Glenn Morris committed
17
Temporary note:
Glenn Morris's avatar
Glenn Morris committed
18 19
+++ indicates that all necessary documentation updates are complete.
    (This means all relevant manuals in doc/ AND lisp doc-strings.)
20
--- means no change in the manuals is needed.
Glenn Morris's avatar
Glenn Morris committed
21
When you add a new item, use the appropriate mark if you are sure it applies,
22
otherwise leave it unmarked.
Glenn Morris's avatar
Glenn Morris committed
23

24

Stefan Monnier's avatar
Stefan Monnier committed
25
* Installation Changes in Emacs 25.1
26

Glenn Morris's avatar
Glenn Morris committed
27
+++
Paul Eggert's avatar
Paul Eggert committed
28 29
** Building Emacs now requires C99 or later.

30
** Building Emacs now requires GNU make, version 3.81 or later.
Glenn Morris's avatar
Glenn Morris committed
31

Paul Eggert's avatar
Paul Eggert committed
32 33 34 35 36 37 38
** By default, Emacs no longer works on IRIX.  We expect that Emacs
users are not affected by this, as SGI stopped supporting IRIX in
December 2013.  If you are affected, please send a bug report.  You
should be able to work around the problem either by porting the Emacs
undumping code to GCC under IRIX, or by configuring --with-wide-int,
or by sticking with Emacs 24.4.

39 40
---
** The configure option `--with-pkg-config-prog' has been removed.
41
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
42

43 44 45
** The configure option '--enable-silent-rules' and the command
'make V=0' now do a better job of suppressing chatter.

Glenn Morris's avatar
Glenn Morris committed
46 47 48 49 50
---
** The `grep-changelog' script (and its manual page) are no longer included.
It has no particular connection to Emacs and has not changed in years,
so if you want to use it, you can always take a copy from an older Emacs.

51

Stefan Monnier's avatar
Stefan Monnier committed
52
* Startup Changes in Emacs 25.1
53 54


Stefan Monnier's avatar
Stefan Monnier committed
55
* Changes in Emacs 25.1
56

57 58 59
** New function `custom-prompt-customize-unsaved-options' checks for
unsaved customizations and prompts user to customize (if found).

60
+++
61 62 63 64
** Network security (TLS/SSL certificate validity and the like) is
added via the new Network Security Manager (NSM) and controlled via
the `network-security-level' variable.

65 66
** C-h l now also lists the commands that were run.

67
---
68
** The new M-s M-w key binding uses eww to search the web for the
69 70
text in the region.

71
** M-x suggests shorthands and ignores obsolete commands for completion.
72 73 74 75 76 77
** x-select-enable-clipboard is renamed select-enable-clipboard.
x-select-enable-primary and renamed select-enable-primary.
Additionally they both now apply to all systems (OSX, GNUstep, Windows, you
name it), with the proviso that on some systems (e.g. Windows)
select-enable-primary is ineffective since the system doesn't
have the equivalent of a primary selection.
Stefan Monnier's avatar
Stefan Monnier committed
78

79 80 81
+++
** terpri gets an optional arg ENSURE to conditionally output a newline.

Leo Liu's avatar
Leo Liu committed
82 83 84
+++
** New macro `define-advice'.

85 86
** `insert-register' now leaves point after the inserted text
when called interactively.  A prefix argument toggles this behavior.
87

88 89
** New var `truncate-string-ellipsis' to choose how to indicate truncation.

90 91 92 93 94
+++
** The new variable `term-file-aliases' replaces some files from lisp/term.
The function `tty-run-terminal-initialization' consults this variable
when deciding what terminal-specific initialization code to run.

95 96 97 98 99
---
** New variable `system-configuration-features', listing some of the
main features that Emacs was compiled with.  This is mainly intended
for use in Emacs bug reports.

100 101 102 103 104
+++
** A password is now hidden also when typed in batch mode.  Another
hiding character but the default `.' can be used by let-binding the
variable `read-hide-char'.

105 106
** The new functions `string-collate-lessp' and `string-collate-equalp'
preserve the collation order as defined by the system's locale(1)
107 108 109
environment.  For the time being this is implemented for modern POSIX
systems and for MS-Windows, for other systems they fall back to their
counterparts `string-lessp' and `string-equal'.
110

111 112 113 114 115 116 117 118 119 120 121
*** The ls-lisp package uses `string-collate-lessp' to sort file names.
If you want the old, locale-independent sorting, customize the new
option `ls-lisp-use-string-collate' to a nil value.

*** The MS-Windows specific variable `w32-collate-ignore-punctuation',
if set to a non-nil value, causes the above 2 functions to ignore
symbol and punctuation characters when collating strings.  This
emulates the behavior of modern Posix platforms when the locale's
codeset is "UTF-8" (as in "en_US.UTF-8").  This is needed because
MS-Windows doesn't support UTF-8 as codeset in its locales.

122 123 124 125 126 127 128
+++
** The new function `bidi-find-overridden-directionality' allows to
find characters whose directionality was, perhaps maliciously,
overridden by directional override control characters.  Lisp programs
can use this to detect potential phishing of URLs and other links that
exploits bidirectional display reordering.

129 130 131 132 133 134 135
+++
** The new function `buffer-substring-with-bidi-context' allows to
copy a portion of a buffer into a different location while preserving
the visual appearance both of the copied text and the text at
destination, even when the copied text includes mixed bidirectional
text and directional control characters.

136 137 138 139 140
** New variable `ns-use-fullscreen-animation' controls animation for
non-native NS fullscreen.  The default is nil.  Set to t to enable
animation when entering and leaving fullscreen.  For native OSX fullscreen
this has no effect.

141
** A new text property `inhibit-read-only' can be used in read-only
142 143
buffers to allow certain parts of the text to be writable.

144 145 146
** A new function `directory-files-recursively' returns all matching
files (recursively) under a directory.

147 148 149 150 151
** The new `directory-name-p' can be used to check whether a file
name (as returned from, for instance, `file-name-all-completions' is
a directory file name.  It returns non-nil if the last character in
the name is a forward slash.

152 153 154 155 156 157
+++
** New variable `fast-but-imprecise-scrolling' inhibits
fontification during full screen scrolling operations, giving less
hesitant operation during auto-repeat of C-v, M-v at the cost of
possible inaccuracies in the end position.

158 159 160 161
** The function `font-info' now returns more details about a font.
In particular, it now returns the average width of the font's
characters, which can be used for geometry-related calculations.

162

Stefan Monnier's avatar
Stefan Monnier committed
163
* Editing Changes in Emacs 25.1
164

165 166
** Unicode names entered via C-x 8 RET now use substring completion by default.

167 168
** New minor mode global-eldoc-mode is enabled by default.

Glenn Morris's avatar
Glenn Morris committed
169
** Emacs now supports "bracketed paste mode" when running on a terminal
170
that supports it.  This facility allows Emacs to understand pasted
Glenn Morris's avatar
Glenn Morris committed
171 172 173
chunks of text as strings to be inserted, instead of interpreting each
character in the pasted text as actual user input.  This results in a
paste experience similar to that under a window system, and significant
174 175
performance improvements when pasting large amounts of text.

Eli Zaretskii's avatar
Eli Zaretskii committed
176 177 178 179 180 181 182 183
** Emacs now supports the latest version of the UBA.
The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
was updated to support all the latest additions and changes introduced
in Unicode Standard versions 6.3 and 7.0, and a few changes suggested
for Unicode 8.0.  This includes full support for directional isolates
and the Bidirectional Parentheses Algorithm (BPA) specified by these
Unicode standards.

184 185
** You can access `mouse-buffer-menu' (C-down-mouse-1) using C-f10.

186

Stefan Monnier's avatar
Stefan Monnier committed
187
* Changes in Specialized Modes and Packages in Emacs 25.1
188 189 190 191
** Shell

When you invoke `shell' interactively, the *shell* buffer will now
display in a new window.  However, you can customize this behavior via
192
the `display-buffer-alist' variable.  For example, to get
193
the old behavior -- *shell* buffer displays in current window -- use
194 195
(add-to-list 'display-buffer-alist
     '("^\\*shell\\*$" . (display-buffer-same-window))).
196

197 198 199 200 201

** EIEIO
*** The <class>-list-p and <class>-child-p functions are declared obsolete.
*** The <class> variables are declared obsolete.
*** The <initarg> variables are declared obsolete.
202 203 204 205
** ido
*** New command `ido-bury-buffer-at-head' bound to C-S-b
Bury the buffer at the head of `ido-matches', analogous to how C-k
kills the buffer at head.
206

207 208 209 210 211 212 213 214
** Minibuffer

*** You can use <up> and <down> keys to move point in the multi-line
minibuffer just as in an ordinary buffer.  Only when point moves over
the bottom/top of the minibuffer it goes to the next/previous history
element.  The new commands bound to <up> and <down> in the minibuffer:
`next-line-or-history-element' and `previous-line-or-history-element'.

215 216
** Search and Replace

217 218 219 220 221 222 223 224
*** Query-replace history is enhanced.
When query-replace reads the FROM string from the minibuffer, typing
`M-p' will now show previous replacements as "FROM SEP TO", where FROM
and TO are the original text and its replacement, and SEP is an arrow
string defined by the new variable `query-replace-from-to-separator'.
To select a prior replacement, type `M-p' until the desired
replacement appears in the minibuffer, and then exit the minibuffer by
typing RET.
225

226 227 228 229 230
** Calc
+++
*** If `quick-calc' is called with a prefix argument, insert the
result of the calculation into the current buffer.

231 232 233 234
** ElDoc
*** New minor mode global-eldoc-mode
*** eldoc-documentation-function now defaults to nil

235 236
** eww

237
+++
238 239 240 241
*** A new command `R' (`eww-readable') will try do identify the main
textual parts of a web page and display only that, leaving menus and
the like off the page.

242
---
243 244 245
*** You can now use several eww buffers in parallel by renaming eww
buffers you want to keep separate.

246
+++
Ivan Shmakov's avatar
Ivan Shmakov committed
247 248 249
*** Partial state of the eww buffers (the URIs and the titles of the
pages visited) is now preserved in the desktop file.

250
+++
251 252 253
*** `eww-after-render-hook' is now called after eww has rendered
the data in the buffer.

254 255 256 257
---
*** The `eww-reload' command now takes a prefix to not reload via
the net, but just use the local copy of the HTML.

258
+++
259 260 261 262 263
*** The DOM shr and eww uses has been changed to the general Emacs
xml.el/libxml2 DOM, and a new package dom.el has been added to
interact with this DOM.  See the Emacs Lisp manual for interface
details.

264
+++
265 266
*** `mailcap-mime-data' is now consulted when displaying PDF files.

267 268 269 270
+++
*** The new `S' command will list all eww buffers, and allow managing
them.

271 272 273 274
---
*** https pages with valid certificates have headers marked in green, while
invalid certificates are marked in red.

275 276 277 278 279
** Message mode

*** text/html messages that contain inline image parts will be
transformed into multipart/related messages before sending.

280 281
** pcase
*** New UPatterns `quote' and `app'.
282
*** New UPatterns can be defined with `pcase-defmacro'.
283 284
+++
*** New vector QPattern.
285

286 287 288
** Lisp mode
*** Strings after `:documentation' are highlighted as docstrings.

289 290 291 292
** Rectangle editing
*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
*** C-x C-x in rectangle-mark-mode now cycles through the four corners.
*** `string-rectangle' provides on-the-fly preview of the result.
293

Glenn Morris's avatar
Glenn Morris committed
294 295
** New font-lock functions font-lock-ensure and font-lock-flush, which
should be used instead of font-lock-fontify-buffer when called from Elisp.
296

297 298 299
** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
appending FUN to `minibuffer-setup-hook'.

300 301 302
** cl-lib
*** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.

303 304 305 306 307 308
** seq
*** New seq library:
The seq library adds sequence manipulation functions and macros that
complement basic functions provided by subr.el. All functions are
prefixed with `seq-' and work on lists, strings and vectors.

309 310 311 312 313
** Calendar and diary

+++
*** New commands to insert diary entries with Chinese dates:
`diary-chinese-insert-anniversary-entry' `diary-chinese-insert-entry'
Glenn Morris's avatar
Glenn Morris committed
314
`diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
315 316

+++
317
*** The calendar can now list and mark diary entries with Chinese dates.
Glenn Morris's avatar
Glenn Morris committed
318 319
See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.

320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336
---
*** The option `calendar-mode-line-format' can now be nil,
which means to do nothing special with the mode line in calendars.

---
*** Many items obsolete since at least version 23.1 have been removed.
The majority were function/variable/face aliases, too numerous to list here.
The remainder were:

**** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
`calendar-two-frame-setup', `european-calendar', `american-calendar'.

**** Hooks `cal-menu-load-hook', `cal-x-load-hook'.

**** Macro `calendar-for-loop'.

**** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
337

338 339
**** The nil and list forms of `diary-display-function'.

340 341
** New ERT function `ert-summarize-tests-batch-and-exit'.

342 343 344
---
** `Info-fontify-maximum-menu-size' can be t for no limit.

345 346 347 348 349
+++
** `info-display-manual' can now be given a prefix argument which (any
non-nil value) directs the command to limit the completion
alternatives to currently visited manuals.

350 351 352
---
** ntlm.el has support for NTLM2.

Glenn Morris's avatar
Glenn Morris committed
353 354 355 356
---
** The Rmail commands d, C-d and u now handle repeat counts to delete or
undelete multiple messages.

357 358 359 360 361 362
** Rmail can now render HTML mail messages if your Emacs was built with
libxml2 or if you have the Lynx browser installed.  By default, Rmail
will display the HTML version of a mail message that has both HTML and
plain text parts, if display of HTML email is possible; customize the
`rmail-mime-prefer-html' option to `nil' if you don't want that.

Glenn Morris's avatar
Glenn Morris committed
363
** SES now supports local printer functions; see `ses-define-local-printer'.
364

Glenn Morris's avatar
Glenn Morris committed
365 366 367
** In sh-mode, you can now use `sh-shell' as a file-local variable to
specify the type of shell in use (bash, csh, etc).

368 369 370 371
** TLS
---
*** Fatal TLS errors are now silent by default.

372 373 374
** URL

*** The URL package accepts now the protocols "ssh", "scp" and "rsync".
375 376 377
When `url-handler-mode' is enabled, file operations for these
protocols as well as for "telnet" and "ftp" are passed to Tramp.

378
*** The URL package allows customizing the `url-user-agent' string.
379 380 381
The new `url-user-agent' variable can be customized to be a string or
a function.

382 383 384 385
*** The new interface variable `url-request-noninteractive' can be used
to specify that we're running in a noninteractive context, and that
we should not be queried about things like TLS certificate validity.

386 387 388 389
*** If URL is used with a https connection, the first callback argument
plist will contain a :peer element that has the output of
`gnutls-peer-status' (if Emacs is built with GnuTLS support).

390 391 392 393
** Tramp

*** New connection method "nc", which allows to access dumb busyboxes.

394 395 396 397 398 399 400 401 402
** SQL mode

*** New user variable `sql-default-directory' enables remote
connections using Tramp.

*** New command `sql-send-line-and-next' sends the current line to the
interactive buffer and advances to the next line, skipping whitespace
and comments.

Sam Steingold's avatar
Sam Steingold committed
403 404
*** Add support for Vertica SQL.

405 406
** VC and related modes

407 408
*** The new command vc-region-history shows the log+diff of the active region.

409 410 411 412
*** New option `vc-annotate-background-mode' controls whether
the color range from `vc-annotate-color-map' is applied to the
background or to the foreground.

413
*** `compare-windows' now compares text with the most recently used window
414 415 416
instead of the next window.  The new option `compare-windows-get-window-function'
allows to customize this.

417 418 419
*** Two new faces `compare-windows-removed' and `compare-windows-added'
replace the obsolete face `compare-windows'.

420 421 422 423
** Calculator: decimal display mode uses "," groups, so it's more
fitting for use in money calculations; factorial works with
non-integer inputs.

424 425 426 427 428 429 430 431 432 433
** HideIfDef mode now support full C/C++ expressions, argumented macro expansions
, interactive macro evaluation and automatic scanning of #defined symbols.

*** New custom variable `hide-ifdef-header-regexp' to define C/C++ header file
name patterns. Default case-insensitive .h, .hh, .hpp and .hxx.
*** New custom variable `hide-ifdef-expand-reinclusion-protection' to prevent
reinclusion protected header files from being fully hidden.
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.

434 435 436 437 438
** TeX mode

*** New custom variable `tex-print-file-extension' to help users who
use PDF instead of DVI.

439 440 441 442
** whitespace-mode: new 'big-indent style highlighting too much indentation.
By default, 32 spaces and four TABs are considered to be too much but
`whitespace-big-indent-regexp' can be configured to change that.

443 444 445 446 447
** tildify: `tildify-space-string', `tildify-pattern', and
`tildify-foreach-region-function' variables added making
`tildify-string-alist', `tildify-pattern-alist', and
`tildify-ignored-environments-alist' variables (as well as a few
helper functions) obsolete.
448

449 450 451 452 453 454
** xref
The new package provides generic framework and new commands to find
and move to definitions, as well as pop back to the original location.

*** New key bindings
`xref-find-definitions' replaces `find-tag' and provides an interface
Paul Eggert's avatar
Paul Eggert committed
455
to pick one destination among several.  Hence, `tags-loop-continue' is
456 457 458 459 460 461 462 463 464 465 466 467
unbound.  `xref-pop-marker-stack' replaces `pop-tag-mark', but uses an
easier binding, which is now unoccupied (`M-,').
`xref-find-definitions-other-window' replaces `find-tag-other-window'.
`xref-find-definitions-other-frame' replaces `find-tag-other-frame'.
`xref-find-apropos' replaces `find-tag-regexp'.

*** New variables
`find-tag-marker-ring-length' is now an obsolete alias for
`xref-marker-ring-length'.  `find-tag-marker-ring' is now an obsolete
alias for a private variable.  `xref-push-marker-stack' and
`xref-pop-marker-stack' should be used to mutate it instead.

468 469 470 471 472
** etags
As a result of the above, these commands are now obsolete:
`find-tag-other-window', `find-tag-other-frame', `find-tag-regexp',
`tags-apropos' and `tags-loop-continue'.

Glenn Morris's avatar
Glenn Morris committed
473 474 475 476 477
** Obsolete packages

---
*** gulp.el

478

Stefan Monnier's avatar
Stefan Monnier committed
479
* New Modes and Packages in Emacs 25.1
480

481
** scss-mode (a minor variant of css-mode)
482 483 484 485

** let-alist is a new macro (and a package) that allows one to easily
let-bind the values stored in an alist.

486

Stefan Monnier's avatar
Stefan Monnier committed
487
* Incompatible Lisp Changes in Emacs 25.1
488

Stefan Monnier's avatar
Stefan Monnier committed
489 490 491 492 493
** completion-table-dynamic stays in the minibuffer.
If you want the old behavior of calling the function in the buffer
from which the minibuffer was entered, call it with the new argument
`switch-buffer'.

Glenn Morris's avatar
Glenn Morris committed
494
** window-configurations no longer record the buffers's marks.
495

Glenn Morris's avatar
Glenn Morris committed
496
** inhibit-modification-hooks now also inhibits lock-file checks, as well as
497 498
active region handling.

499 500
** deactivate-mark is now buffer-local.

Glenn Morris's avatar
Glenn Morris committed
501
** `cl-the' now asserts that its argument is of the given type.
502

503 504 505 506 507
+++
** Mouse click events on mode line or header line no longer include
any reference to a buffer position.  The 6th member of the mouse
position list returned for such events is now nil.

508 509 510
** Menu items in keymaps do not support the "key shortcut cache" any more.
These slots used to hold key-shortcut data, but have been obsolete since
Emacs-21.
511

512

Stefan Monnier's avatar
Stefan Monnier committed
513
* Lisp Changes in Emacs 25.1
514

Stefan Monnier's avatar
Stefan Monnier committed
515 516
** define-inline provides a new way to define inlinable functions.

517 518
** New function macroexpand-1 to perform a single step of macroexpansion.

519 520
** Some "x-*" were obsoleted:
*** x-select-text is renamed gui-select-text.
521
*** x-selection-value is renamed gui-selection-value.
522 523 524 525
*** x-get-selection is renamed gui-get-selection.
*** x-get-clipboard and x-clipboard-yank are marked obsolete.
*** x-get-selection-value is renamed to gui-get-primary-selection.
*** x-set-selection is renamed to gui-set-selection
Stefan Monnier's avatar
Stefan Monnier committed
526

527
** New function `alist-get', which is also a valid place (aka lvalue).
528

529 530 531 532
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
called interactively.

533 534
** New function `function-put' to use instead of `put' for function properties.

535
+++
536
** New properties that can be specified with `declare':
Glenn Morris's avatar
Glenn Morris committed
537
*** (interactive-only INSTEAD), says to use INSTEAD for non-interactive use.
538 539 540
*** (pure VAL), if VAL is non-nil, indicates the function is pure.
*** (side-effect-free VAL), if VAL is non-nil, indicates the function does not
have side effects.
541

542 543 544 545
+++
** New macro `with-file-modes', for evaluating expressions with default file
permissions set to temporary values (e.g., for creating private files).

546
** You can access the slots of structures using `cl-struct-slot-value'.
Daniel Colascione's avatar
Daniel Colascione committed
547

548 549 550
** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
optional repeat-count argument.

551 552
** Function `sort' can deal with vectors.

553
** Function `system-name' now returns an updated value if the current
554 555 556
system's name has changed or if the Emacs process has changed systems,
and to avoid long waits it no longer consults DNS to canonicalize the
name.  The variable `system-name' is now obsolete.
557

558 559 560
+++
** Function `write-region' no longer outputs "Wrote FILE" in batch mode.

561
---
562 563 564 565 566
** New utilities in subr-x.el:
*** New macros `if-let' and `when-let' allow defining bindings and to
    execute code depending whether all values are true.
*** New macros `thread-first' and `thread-last' allow threading a form
    as the first or last argument of subsequent forms.
567

568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586
+++
** Time-related changes:

*** Time-related functions now consistently accept numbers
(representing seconds since the epoch) and nil (representing the
current time) as well as the usual list-of-integer representation.
Affected functions include `current-time-string', `current-time-zone',
`decode-time', `float-time', `format-time-string', `seconds-to-time',
`time-add', `time-less-p', `time-subtract', `time-to-day-in-year',
`time-to-days', and `time-to-seconds'.

*** The `encode-time-value' and `with-decoded-time-value' macros have
been obsoleted.

*** `calendar-next-time-zone-transition', `time-add', and
`time-subtract' no longer return time values in the obsolete and
undocumented integer-pair format.  Instead, they return a list of two
integers.

587

Stefan Monnier's avatar
Stefan Monnier committed
588
* Changes in Frames and Windows Code in Emacs 25.1
589

590
+++
591
** Emacs can now draw horizontal scroll bars on some platforms that
592
provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
Martin Rudalics's avatar
Martin Rudalics committed
593
Horizontal scroll bars are turned off by default.
594 595
*** New function `horizontal-scroll-bars-available-p' telling whether
    horizontal scroll bars are available on the underlying system.
Martin Rudalics's avatar
Martin Rudalics committed
596 597
*** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
    bars on all existing and future frames.
598 599
*** New function `toggle-horizontal-scroll-bar' to toggle horizontal
    scroll bars on the selected frame.
Martin Rudalics's avatar
Martin Rudalics committed
600 601 602
*** New frame parameters `horizontal-scroll-bars' and
    `scroll-bar-height' to set horizontal scroll bars and their height
    for individual frames and in `default-frame-alist'.
603 604 605
*** New functions `frame-scroll-bar-height' and
    `window-scroll-bar-height' return the height of horizontal scroll
    bars on a specific frame or window.
Martin Rudalics's avatar
Martin Rudalics committed
606 607
*** `set-window-scroll-bars' now accepts five parameters where the last
    two specify height and type of the window's horizontal scroll bar.
608 609 610 611
*** `window-scroll-bars' now returns type and sizes of horizontal scroll
    bars too.
*** New buffer-local variables `horizontal-scroll-bar' and
    `scroll-bar-height'.
Martin Rudalics's avatar
Martin Rudalics committed
612

613
+++
Daniel Colascione's avatar
Daniel Colascione committed
614
** The height of a frame's menu and tool bar are no longer counted in the
Martin Rudalics's avatar
Martin Rudalics committed
615 616 617 618 619 620
frame's text height.  This means that the text height stands only for
the height of the frame's root window plus that of the echo area (if
present).  This was already the behavior for frames with external tool
and menu bars (like in the Gtk builds) but has now been extended to all
builds.

621
+++
Martin Rudalics's avatar
Martin Rudalics committed
622 623 624 625 626 627 628 629 630
** Frames now do not necessarily preserve the number of columns or lines
they display when setting default font, menu bar, fringe width, or
scroll bars.  In particular, maximized and fullscreen frames are
conceptually never resized if such settings change.  For fullheight and
fullwidth frames, the behavior may depend on the toolkit used.
*** New option `frame-inhibit-implied-resize' if non-nil, means that
   setting default font, menu bar, fringe width, or scroll bars of a
   specific frame does not resize that frame in order to preserve the
   number of columns or lines it displays.
631

632
+++
633 634 635 636
** New function `window-preserve-size' allows to preserve the size of
windows without "fixing" it.  It's supported by `fit-window-to-buffer',
`temp-buffer-resize-mode' and `display-buffer'.

Jan Djärv's avatar
Jan Djärv committed
637
** Tearoff menus and detachable toolbars for Gtk+ has been removed.
638 639
Those features have been deprecated in Gtk+ for a long time.

640

Stefan Monnier's avatar
Stefan Monnier committed
641
* Changes in Emacs 25.1 on Non-Free Operating Systems
642

Glenn Morris's avatar
Glenn Morris committed
643 644 645 646 647
---
** Building Emacs for MS-Windows requires at least Windows XP
or Windows Server 2003.  The built binaries still run on all versions
of Windows starting with Windows 9X.

648 649 650
** OS X 10.5 or older is no longer supported.

** OS X on PowerPC is no longer supported.
651

652

Dave Love's avatar
#  
Dave Love committed
653
----------------------------------------------------------------------
654
This file is part of GNU Emacs.
Dave Love's avatar
#  
Dave Love committed
655

656
GNU Emacs is free software: you can redistribute it and/or modify
657
it under the terms of the GNU General Public License as published by
658 659
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
660 661 662 663 664

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
Dave Love's avatar
#  
Dave Love committed
665

666
You should have received a copy of the GNU General Public License
667
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
Dave Love's avatar
#  
Dave Love committed
668

669

Dave Love's avatar
#  
Dave Love committed
670
Local variables:
671
coding: utf-8
Dave Love's avatar
#  
Dave Love committed
672 673 674
mode: outline
paragraph-separate: "[ 	]*$"
end: