of curved quotes for 'electric-quote-mode', allowing user to choose
the types of quotes to be used.
+---
** The new user option 'electric-quote-context-sensitive' makes
'electric-quote-mode' context sensitive. If it is non-nil, you can
type an ASCII apostrophe to insert an opening or closing quote,
and it will replace the apostrophe by a closing quote character in all
other cases.
+---
** The new variable 'electric-quote-inhibit-functions' controls when
to disable electric quoting based on context. Major modes can add
functions to this list; Emacs will temporarily disable
** 'find-library' now takes a prefix argument to pop to a different
window.
----
-** 'process-attributes' on Darwin systems now returns more information.
-
+++
** Several accessors for the value returned by 'file-attributes'
have been added. They are: 'file-attribute-type',
until they have changed status to "run". This is most easily done
from a process sentinel.
+---
** 'make-network-process' and 'open-network-stream' sometimes allowed
:service to be an integer string (e.g., :service "993") and sometimes
required an integer (e.g., :service 993). This difference has been
eliminated, and integer strings work everywhere.
+---
** It is possible to disable attempted recovery on fatal signals.
-
Two new variables support disabling attempts to recover from stack
overflow and to avoid automatic auto-save when Emacs is delivered a
fatal signal. 'attempt-stack-overflow-recovery', if set to 'nil',
in these situations.
+++
-** 'interrupt-process' consults now the list
-'interrupt-process-functions', which function has to be called in
-order to deliver the SIGINT signal. This allows Tramp to send the
-SIGINT signal to remote asynchronous processes. The hitherto existing
-implementation has been moved to 'internal-default-interrupt-process'.
+** 'interrupt-process' now consults the list 'interrupt-process-functions',
+to determine which function has to be called in order to deliver the
+SIGINT signal. This allows Tramp to send the SIGINT signal to remote
+asynchronous processes. The hitherto existing implementation has been
+moved to 'internal-default-interrupt-process'.
+++
** File local and directory local variables are now initialized each
new option 'debugger-print-function'.
+++
-** NUL bytes in strings copied to the system clipboard are now
-replaced with "\0".
+** NUL bytes in text copied to the system clipboard are now replaced with "\0".
+++
** The new variable 'x-ctrl-keysym' has been added to the existing
'mwheel-flip-direction'.
+++
-** Emacsclient has a new option -u/--suppress-output. The option
-suppresses display of return values from the server process.
-
----
-** New user option 'dig-program-options' and extended functionality
-for DNS-querying functions 'nslookup-host', 'dns-lookup-host',
-and 'run-dig'. Each function now accepts an optional name server
-argument interactively (with a prefix argument) and non-interactively.
+** Emacsclient has a new option -u/--suppress-output.
+This option suppresses display of return values from the server
+process.
+++
** Emacsclient has a new option -T/--tramp.
use the local Emacs to edit remote files via Tramp. See the node
"emacsclient Options" in the user manual for the details.
+---
+** New user option 'dig-program-options' and extended functionality
+for DNS-querying functions 'nslookup-host', 'dns-lookup-host',
+and 'run-dig'. Each function now accepts an optional name server
+argument interactively (with a prefix argument) and non-interactively.
+
+++
** 'describe-key-briefly' now ignores mouse movement events.
+++
** The new variable 'eval-expression-print-maximum-character' prevents
-large integers from being displayed as characters.
+large integers from being displayed as characters by 'M-:' and similar
+commands.
+---
** Two new commands for finding the source code of Emacs Lisp
libraries: 'find-library-other-window' and 'find-library-other-frame'.
** The new variable 'display-raw-bytes-as-hex' allows to change the
display of raw bytes from octal to hex.
++++
** You can now provide explicit field numbers in format specifiers.
For example, '(format "%2$s %1$s" "X" "Y")' produces "Y X".
+---
** 'comment-indent-function' values may now return a cons to specify a
range of indentation.
using these modes, customize `display-line-numbers-type' with the same
value as you would use with `display-line-numbers'.
-If `display-line-numbers' is set to t, Emacs will display the number
-of each line before the line. If set to 'relative', Emacs will
-display the line number relative to the line showing point, with that
-line's number displayed as absolute. If set to 'visual', Emacs will
-display a relative number for every screen line, i.e. it will count
-screen lines rather than buffer lines. The default is nil, which
-doesn't display the line numbers.
-
-In 'relative' and 'visual' modes, the variable
-'display-line-numbers-current-absolute' controls what number is
-displayed for the line showing point. By default, this variable's
-value is t, which means display the absolute line number for the line
-showing point. Customizing this variable to a nil value will cause
-Emacs to show zero instead, which preserves horizontal space of the
-window in large buffers.
-
Line numbers are not displayed at all in minibuffer windows and in
tooltips, as they are not useful there.
-The new face 'line-number' is used to display the line numbers. The
-new face 'line-number-current-line' can be customized to display the
-current line's number differently from all the other line numbers; by
-default these two faces are identical.
-
-You can also customize the new buffer-local variable
-'display-line-numbers-width' to specify a fixed minimal with of the
-area allocated to line-number display. The default is nil, meaning
-that Emacs will dynamically calculate the area width, enlarging or
-shrinking it as needed. Setting it to a non-negative integer
-specifies that as the minimal width; selecting a value that is large
-enough to display all line numbers in a buffer will then keep the
-line-number display area of constant width at all times, if that is
-desired.
-
-When using `display-line-numbers-mode', you can customize the variable
-`display-line-numbers-grow-only' to a non-nil value; this means that
-Emacs may grow the above area width dynamically, but never shrink it.
-Under this mode, customizing the variable
-`display-line-numbers-width-start' to a non-nil value will cause Emacs
-to set `display-line-numbers-width' to the minimum width necessary to
-display all line numbers in the current buffer when first visiting it.
-
Lisp programs can disable line-number display for a particular screen
line by putting the 'display-line-numbers-disable' text property or
overlay property on the first character of that screen line. This is
'undo', undo the last replacement; bound to 'u'.
'undo-all', undo all replacements; bound to 'U'.
+---
** 'delete-trailing-whitespace' deletes whitespace after form feed.
In modes where form feed was treated as a whitespace character,
'delete-trailing-whitespace' would keep lines containing it unchanged.
It now deletes whitespace after the last form feed thus behaving the
same as in modes where the character is not whitespace.
-** No more prompt about changed file when the file's content is unchanged.
-Instead of only checking the modification time, Emacs now also checks
-the file's actual content before prompting the user.
+---
+** Emacs no longer prompts about editing a changed file when the file's
+content is unchanged. Instead of only checking the modification time,
+Emacs now also checks the file's actual content before prompting the user.
+---
** Various casing improvements.
*** 'upcase', 'upcase-region' et al. convert title case characters
capitalized instead of incorrect Όσοσ (compare lowercase sigma at the
end of the word).
++++
** Emacs can now auto-save buffers to visited files in a more robust
manner via the new mode 'auto-save-visited-mode'. Unlike
'auto-save-visited-file-name', this mode uses the normal saving
defun are selected unless they are separated from the defun by a blank
line.
+---
** New command 'replace-buffer-contents'.
This command replaces the contents of the accessible portion of the
current buffer with the contents of the accessible portion of a
\f
* Changes in Specialized Modes and Packages in Emacs 26.1
+---
** New function `cl-generic-p'.
** Dired
*** Dired supports wildcards in the directory part of the file names.
+++
-*** You can now use '`?`' in 'dired-do-shell-command'; as ' ? ', it gets replaced
-by the current file name.
+*** You can now use '`?`' in 'dired-do-shell-command'.
+It gets replaced by the current file name, like ' ? '.
-*** html2text is now marked obsolete.
++++
+*** A new option 'dired-always-read-filesystem' default to nil.
+If non-nil, buffers visiting files are reverted before search them;
+for instance, in 'dired-mark-files-containing-regexp' a non-nil value
+of this option means the file is revisited in a temporary buffer;
+this temporary buffer is the actual buffer searched: the original buffer
+visiting the file is not modified.
-*** smerge-refine-regions can refine regions in separate buffers
++++
+*** In wdired, when editing files to contain slash characters,
+the resulting directories are automatically created. Whether to do
+this is controlled by the 'wdired-create-parent-directories' variable.
-*** Info menu and index completion uses substring completion by default.
++++
+*** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
+viewing HTML files and the like.
+
+---
+** html2text is now marked obsolete.
+
+---
+** smerge-refine-regions can refine regions in separate buffers
+
+---
+** Info menu and index completion uses substring completion by default.
This can be customized via the info-menu category in
completion-category-override.
+++
-*** The ancestor buffer is shown by default in 3way merges.
+** The ancestor buffer is shown by default in 3way merges.
A new option ediff-show-ancestor and a new toggle
ediff-toggle-show-ancestor.
+---
** TeX: Add luatex and xetex as alternatives to pdftex
** Electric-Buffer-menu
** Browse-URL
+---
*** Support for opening links to man pages in Man or WoMan mode.
** Comint
displayed in the mode line. These are updated as compilation
proceeds.
-+++
-*** A new option 'dired-always-read-filesystem' default to nil.
-If non-nil, buffers visiting files are reverted before search them;
-for instance, in 'dired-mark-files-containing-regexp' a non-nil value
-of this option means the file is revisited in a temporary buffer;
-this temporary buffer is the actual buffer searched: the original buffer
-visiting the file is not modified.
-
-+++
-*** In wdired, when editing files to contain slash characters,
-the resulting directories are automatically created. Whether to do
-this is controlled by the 'wdired-create-parent-directories' variable.
-
-+++
-*** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
-viewing HTML files and the like.
-
** Grep
---
they contain colons. This can be controlled by the new custom option
'grep-use-null-filename-separator'.
+---
*** The grep/rgrep/lgrep functions will now ask about saving files
before running. This is controlled by the 'grep-save-buffers'
variable.
** Edebug
+---
*** Edebug can be prevented from pausing 1 second after reaching a
breakpoint (e.g. with "f" and "o") by customizing the new option
'edebug-sit-on-break'.
** Eshell
+---
*** 'eshell-input-filter's value is now a named function
'eshell-input-filter-default', and has a new custom option
'eshell-input-filter-initial-space' to ignore adding commands prefixed
** Ido
+---
*** The commands 'find-alternate-file-other-window',
'dired-other-window', 'dired-other-frame', and
'display-buffer-other-window' are now remapped to Ido equivalents if
** Image-Dired
+---
*** Now provides a minor mode 'image-dired-minor-mode' which replaces
the function 'image-dired-setup-dired-keybindings'.
+---
*** Thumbnail generation is now asynchronous
The number of concurrent processes is limited by the variable
'image-dired-thumb-job-limit'.
+---
*** 'image-dired-thumbnail-storage' has a new option 'standard-large'
for generating 256x256 thumbnails according to the Thumbnail Managing
Standard.
+---
*** Inherits movement keys from 'image-mode' for viewing full images.
This includes the usual char, line, and page movement commands.
+---
*** All the -options types have been changed to argument lists
instead of shell command strings. This change affects
'image-dired-cmd-create-thumbnail-options',
'image-dired-cmd-pngnq-options', 'image-dired-cmd-pngcrush-options',
'image-dired-cmd-create-standard-thumbnail-options'
+---
*** Recognizes more tools by default, including pngnq-s9 and OptiPNG
+---
*** 'find-file' and related commands now work on thumbnails and
displayed images, providing a default argument of the original file name
via an addition to 'file-name-at-point-functions'.
** ERC
+---
*** New variable 'erc-default-port-tls' used to connect to TLS IRC
servers.
** CC mode
+---
*** Opening a .h file will turn C or C++ mode depending on language used.
This is done with the help of 'c-or-c++-mode' function which analyses
contents of the buffer to determine whether it's a C or C++ source
** Flymake
+++
-*** Emacs does no longer prompt the user before killing Flymake
-processes on exit.
+*** Emacs no longer prompts the user before killing Flymake processes on exit.
\f
* New Modes and Packages in Emacs 26.1
\f
* Incompatible Lisp Changes in Emacs 26.1
+---
*** password-data is now a hash-table
so that `password-read' can use any object for the `key' argument.
compatible with previous Emacs versions. This functionality can be disabled
by setting 'byte-compile-cond-use-jump-table' to nil.
+---
** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
mode to send the same escape sequences that xterm does. This makes
things like forward-word in readline work.
Additionally, the new nil value restores pre-24.5 behavior
of not providing replacement pairs via the history.
+---
** Some obsolete functions, variables, and faces have been removed:
*** make-variable-frame-local. Variables cannot be frame-local any more.
*** From subr.el: window-dot, set-window-dot, read-input, show-buffer,
'format-message'. In particular, when this variable's value is
'grave', all quotes in formats are output as-is.
+---
** Functions like 'check-declare-file' and 'check-declare-directory'
now generate less chatter and more-compact diagnostics. The auxiliary
function 'check-declare-errmsg' has been removed.
instead.
+++
-** 'min' and 'max' no longer round their results. Formerly, they
-returned a floating-point value if any argument was floating-point,
-which was sometimes numerically incorrect. For example, on a 64-bit
-host (max 1e16 10000000000000001) now returns its second argument
-instead of its first.
+** 'min' and 'max' no longer round their results.
+Formerly, they returned a floating-point value if any argument was
+floating-point, which was sometimes numerically incorrect. For
+example, on a 64-bit host (max 1e16 10000000000000001) now returns its
+second argument instead of its first.
+++
** The variable 'old-style-backquotes' has been made internal and
renamed to 'lread--old-style-backquotes'. No user code should use
this variable.
+---
** To avoid confusion caused by "smart quotes", the reader no longer
accepts Lisp symbols which begin with the following quotation
characters: ‘’‛“”‟〞＂＇, unless they are escaped with backslash.
Emacs can access and copy them reliably regardless of their contents.
The following changes are involved.
+---
*** 'file-attributes' and 'file-symlink-p' no longer prepend "/:" to
symbolic links whose targets begin with "/" and contain ":". For
example, if a symbolic link "x" has a target "/y:z", (file-symlink-p
"x") now returns "/y:z" rather than "/:/y:z".
+---
*** 'make-symbolic-link' no longer looks for file name handlers when
creating a local symbolic link. For example, (make-symbolic-link
"/y:z" "x") now creates a symlink to "/y:z" instead of failing.
++++
*** 'make-symbolic-link' now expands a link target with leading "~"
only when the optional third arg is an integer, as when invoked
interactively. For example, (make-symbolic-link "~y" "x") now creates
** The arguments LOCKNAME and MUSTBENEW of 'write-region' are
propagated to file name handlers now.
+---
** When built against recent versions of GTK+, Emacs always uses
gtk_window_move for moving frames and ignores the value of the
variable 'x-gtk-use-window-move'. The variable is now obsolete.
\f
* Lisp Changes in Emacs 26.1
++++
** New optional argument TEXT in 'make-temp-file'.
+---
** New function `define-symbol-prop'.
+++
** New optional argument TESTFN in 'alist-get', 'map-elt' and 'map-put'.
++++
** New function 'seq-set-equal-p' to check if SEQUENCE1 and SEQUENCE2
contain the same elements, regardless of the order.
The default value of 'save-some-buffers-default-predicate' is nil,
which means ask about all file-visiting buffers.
+---
** string-(to|as|make)-(uni|multi)byte are now declared obsolete.
+
++++
** New variable 'while-no-input-ignore-events' which allow
setting which special events 'while-no-input' should ignore.
It is a list of symbols.
+---
** New function 'undo-amalgamate-change-group' to get rid of
undo-boundaries between two states.
+---
** New var 'definition-prefixes' is a hash table mapping prefixes to
the files where corresponding definitions can be found. This can be
used to fetch definitions that are not yet loaded, for example for
'C-h f'.
+---
** New var 'syntax-ppss-table' to control the syntax-table used in
'syntax-ppss'.
incorporate configuration changes made in the mode hook into the
mode's setup.
+---
** Autoload files can be generated without timestamps,
by setting 'autoload-timestamps' to nil.
FIXME As an experiment, nil is the current default.
that are not built-in primitives. We recommend using this new
function instead of 'subr-arity'.
+---
** New function 'region-bounds' can be used in the interactive spec
to provide region boundaries (for rectangular regions more than one)
to an interactively callable function as a single argument instead of
** 'read-color' will now display the color names using the color itself
as the background color.
+---
** The function 'redirect-debugging-output' now works on platforms
other than GNU/Linux.
+++
** 'format-time-string' now formats "%q" to the calendar quarter.
-** New built-in function 'mapcan' which avoids unnecessary consing (and garbage
-collection).
++++
+** New built-in function 'mapcan'.
+It avoids unnecessary consing (and garbage collection).
+++
** 'car' and 'cdr' compositions 'cXXXr' and 'cXXXXr' are now part of Elisp.
** 'if-let*', 'when-let*', and 'and-let*' are new in subr-x.el.
The incumbent 'if-let' and 'when-let' are now aliases.
+---
** Low-level list functions like 'length' and 'member' now do a better
job of signaling list cycles instead of looping indefinitely.
WINDOW for redisplay.
+++
-*** Support for side windows is now official. The display action
-function 'display-buffer-in-side-window' will display its buffer in a
-side window. Functions for toggling all side windows on a frame,
-changing and reversing the layout of side windows and returning the main
-(major non-side) window of a frame are provided. For details consult
-the section "Side Windows" in the Elisp manual.
+*** Support for side windows is now official.
+The display action function 'display-buffer-in-side-window' will
+display its buffer in a side window. Functions for toggling all side
+windows on a frame, changing and reversing the layout of side windows
+and returning the main (major non-side) window of a frame are
+provided. For details consult the section "Side Windows" in the Elisp
+manual.
+++
*** Support for atomic windows - rectangular compositions of windows
** 'tcl-auto-fill-mode' is now declared obsolete. Its functionality
can be replicated simply by setting 'comment-auto-fill-only-comments'.
-** New pcase pattern 'rx' to match against a rx-style regular
-expression.
+** New pcase pattern 'rx' to match against a rx-style regular expression.
+For details, see the doc string of 'rx--pcase-macroexpander'.
\f
* Changes in Emacs 26.1 on Non-Free Operating Systems
++++
** Intercepting hotkeys on Windows 7 and later now works better.
The new keyboard hooking code properly grabs system hotkeys such as
Win-* and Alt-TAB, in a way that Emacs can get at them before the
Windows 9X, the previous limitations, spelled out in the Emacs manual,
still apply.)
+---
** 'convert-standard-filename' no longer mirrors slashes on MS-Windows.
Previously, on MS-Windows this function converted slash characters in
file names into backslashes. It no longer does that. If your Lisp
(aset file-name (match-beginning 0) ?\\)
(setq start (match-end 0))))
-** GUI sessions now treat SIGINT like Posix platforms do.
+---
+** GUI sessions on MS-Windows now treat SIGINT like Posix platforms do.
The effect of delivering a Ctrl-C (SIGINT) signal to a GUI Emacs on
MS-Windows is now the same as on Posix platforms -- Emacs saves the
session and exits. In particular, this will happen if you start
causes the receiving process to terminate with a core dump if no
debugger has been attached to it.
+---
** 'set-mouse-position' and 'set-mouse-absolute-pixel-position' work
on macOS.
+---
** Emacs can now be run as a GUI application from the command line on
macOS.
++++
** 'ns-appearance' and 'ns-transparent-titlebar' change the appearance
of frame decorations on macOS 10.9+.
+---
** 'ns-use-thin-smoothing' enables thin font smoothing on macOS 10.8+.
+---
+** 'process-attributes' on Darwin systems now returns more information.
+
\f
----------------------------------------------------------------------
This file is part of GNU Emacs.
projects / emacs.git / commitdiff