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3256 lines
138 KiB
Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2017-2024 Free Software Foundation, Inc.
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See the end of the file for license conditions.
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Please send Emacs bug reports to 'bug-gnu-emacs@gnu.org'.
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If possible, use 'M-x report-emacs-bug'.
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This file is about changes in Emacs version 27.
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See file HISTORY for a list of GNU Emacs versions and release dates.
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See files NEWS.26, NEWS.25, ..., NEWS.18, and NEWS.1-17 for changes
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in older Emacs versions.
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You can narrow news to a specific version by calling 'view-emacs-news'
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with a prefix argument or by typing 'C-u C-h C-n'.
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* Changes in Emacs 27.2
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This is a bug-fix release with no new features.
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* Lisp Changes in Emacs 27.2
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** The behavior of the user option 'resize-mini-frames' has changed.
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If set to a non-nil value which isn't a function, resize the mini
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frame using the new function 'fit-mini-frame-to-buffer' which won't
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skip leading or trailing empty lines of the buffer.
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** Update IRC-related references to point to Libera.Chat.
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In June 2021, the Free Software Foundation and the GNU Project moved
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their official IRC channels from the Freenode network to Libera.Chat
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in the aftermath of the changes in Freenode's governance structure and
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policies in May and June 2021. The decision-making process took into
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account the feedback received from the community against a set of
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criteria devised by a working group drawn from both GNU and the FSF
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to gauge a chat network's acceptability to software freedom activists.
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For the original announcement and the follow-up update, including more
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details, see:
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https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00005.html
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https://lists.gnu.org/archive/html/info-gnu/2021-06/msg00007.html
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Given the relocation of GNU and FSF's official IRC channels, as well
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as #emacs and various other Emacs-themed channels (see the link below)
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to Libera.Chat, IRC-related references in the Emacs repository have
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now been updated to point to Libera.Chat.
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https://lists.gnu.org/archive/html/info-gnu-emacs/2021-06/msg00000.html
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* Changes in Specialized Modes and Packages in Emacs 27.2
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** Tramp
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*** The user option 'tramp-completion-reread-directory-timeout' is now obsolete.
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* Changes in Emacs 27.2 on Non-Free Operating Systems
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** Emacs now ignores modifier keys when IME input is used.
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By default, pressing Ctrl, Shift, and Alt keys while using IME input
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will no longer apply the modifiers to the produced characters, as
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there are IMEs which use keys with modifiers to input some
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characters. Customize the variable 'w32-ignore-modifiers-on-IME-input'
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to nil to get back the old behavior.
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* Installation Changes in Emacs 27.1
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** Emacs now uses GMP, the GNU Multiple Precision library.
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By default, if 'configure' does not find a suitable libgmp, it
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arranges for the included mini-gmp library to be built and used.
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The new configure option '--without-libgmp' uses mini-gmp even if a
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suitable libgmp is available.
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** Emacs can now use HarfBuzz as its shaping engine.
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The new configure option '--with-harfbuzz' adds support for the
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HarfBuzz text shaping engine. It is on by default; use './configure
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--without-harfbuzz' to build without it. The HarfBuzz text shaping is
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available via new font backend drivers 'xfthb' and 'ftcrhb' for Xft
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and Cairo drawings, respectively, and via the 'harfbuzz' backend on
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MS-Windows. The HarfBuzz text shaping is preferred to the previously
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supported ones, so the font backends that use older shaping engines
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(FLT on GNU and Unix systems and Uniscribe on MS-Windows) are not
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enabled by default; they can be enabled via the 'font-backend' frame
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parameter or via X resources.
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** The new configure option '--with-json' adds native support for JSON.
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This uses the Jansson library. The option is on by default; use
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'./configure --with-json=no' to build without Jansson support. The
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new JSON functions 'json-serialize', 'json-insert',
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'json-parse-string', and 'json-parse-buffer' are typically much faster
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than their Lisp counterparts from json.el.
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** The configure option '--with-cairo' is no longer experimental.
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This builds Emacs with Cairo drawing, and supports built-in printing
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when Emacs is built with GTK+. Some severe bugs in this build were
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fixed, and we can therefore offer this to users without caveats. Note
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that building with Cairo enabled results in using Pango instead of
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libXft for font support, and that Pango 1.44 has removed support for
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bitmapped fonts.
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** Emacs now uses a "portable dumper" instead of unexec.
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This improves compatibility with memory allocation on modern systems,
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and in particular better supports the Address Space Layout
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Randomization (ASLR) feature, a security technique used by most modern
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operating systems.
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When built with the portable dumping support (which is the default),
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Emacs looks for the "emacs.pdmp" file, generated during the build, in
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its data directory at startup, and loads the dumped state from there.
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The new command-line argument '--dump-file=FILE' allows specifying a
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non-default ".pdmp" file to load the state from; see the node
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"(emacs) Initial Options" in the Emacs manual for more information.
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An Emacs started via a dump file can create a new dump file only if it
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was invoked with the '-batch' option. (This is a temporary
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limitation; we plan on lifting it in a future release.)
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Although the portable dumper has been tested, it may have a bug on
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unusual platforms. If you require traditional unexec dumping you can
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use the configure-time option '--with-dumping=unexec'; however, please
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file a bug report describing the situation, as unexec dumping is
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deprecated, and we plan on removing it in some future release.
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** The new configure option '--enable-checking=structs' attempts to
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check that the portable dumper code has been updated to match the last
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change to one of the data structures that it relies on.
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** The configure options '--enable-checking=conslist' and
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'--enable-checking=xmallocoverrun' have been withdrawn. The former
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made Emacs irredeemably slow, and the latter made it crash. Neither
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option was useful with modern debugging tools such as AddressSanitizer.
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(See "etc/DEBUG" for the details of using the modern replacements of the
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removed configure options.)
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** Emacs no longer defaults to using ImageMagick to display images.
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This is due to security and stability concerns with ImageMagick. To
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override the default, use 'configure --with-imagemagick'.
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** Several configure options now accept an option-argument 'ifavailable'.
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For example, './configure --with-xpm=ifavailable' now configures Emacs
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to attempt to use libxpm but to continue building even if libxpm is
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absent. The other affected options are '--with-gif', '--with-gnutls',
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'--with-jpeg', '--with-png', and '--with-tiff'.
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** The 'etags' program now uses the C library's regular expression matcher.
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If it's possible, 'etags' will use the regexp matcher from the
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system's standard C library, otherwise it will be linked with a
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compatible regex substitute. This lets developers maintain Emacs's
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own regex code without having to also support other programs. The new
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configure option '--without-included-regex' forces 'etags' to use the C
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library's regex matcher even if the regex substitute ordinarily would
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be used to work around compatibility problems.
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** Emacs has been ported to the '-fcheck-pointer-bounds' option of GCC.
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This causes Emacs to check bounds of some arrays addressed by its
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internal pointers, which can be helpful when debugging the Emacs
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interpreter or modules that it uses. If your platform supports it you
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can enable it when configuring, e.g., './configure CFLAGS="-g3 -O2
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-mmpx -fcheck-pointer-bounds"' on Intel MPX platforms.
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** Emacs now normally uses a C pointer type instead of a C integer
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type to implement Lisp_Object, which is the fundamental machine word
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type internal to the Emacs Lisp interpreter. This change aims to
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catch typos and supports '-fcheck-pointer-bounds'. The configure
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option '--enable-check-lisp-object-type' is therefore no longer as
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useful and so is no longer enabled by default in developer builds,
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to reduce differences between developer and production builds.
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** The distribution tarball now has test cases; 'make check' runs them.
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This is intended mostly to help developers.
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** Emacs now requires GTK 2.24 and GTK 3.10 for the GTK 2 and GTK 3
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builds respectively.
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** New make target 'help' shows a summary of common make targets.
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** Emacs now builds with dynamic module support by default.
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Pass '--without-modules' to 'configure' to disable dynamic module
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support.
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** The ftx font backend driver is now obsolete and will be removed in
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Emacs 28.
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* Startup Changes in Emacs 27.1
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** Emacs can now use the XDG convention for init files.
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The 'XDG_CONFIG_HOME' environment variable (which defaults to
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"~/.config") specifies the XDG configuration parent directory. Emacs
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checks for "init.el" and other configuration files inside the "emacs"
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subdirectory of 'XDG_CONFIG_HOME', i.e. "$XDG_CONFIG_HOME/emacs/init.el"
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However, Emacs will still initially look for init files in their
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traditional locations if "~/.emacs.d" or "~/.emacs" exist, even if
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"$XDG_CONFIG_HOME/emacs" also exists. This means that you must delete
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or rename any existing "~/.emacs.d" and "~/.emacs" to enable use of
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the XDG directory.
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If "~/.emacs.d" does not exist, and Emacs has decided to use it
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(i.e. "$XDG_CONFIG_HOME/emacs" does not exist), Emacs will create it.
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Emacs will never create "$XDG_CONFIG_HOME/emacs".
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Whichever directory Emacs decides to use, it will set
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'user-emacs-directory' to point to it.
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** Emacs can now be configured using an early init file.
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The file is called "early-init.el", in 'user-emacs-directory'. It is
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loaded very early in the startup process: before graphical elements
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such as the tool bar are initialized, and before the package manager
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is initialized. The primary purpose is to allow customizing how the
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package system is initialized given that initialization now happens
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before loading the regular init file (see below).
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We recommend against putting any customizations in this file that
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don't need to be set up before initializing installed add-on packages,
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because the early init file is read too early into the startup
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process, and some important parts of the Emacs session, such as
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'window-system' and other GUI features, are not yet set up, which could
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make some customization fail to work.
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** Installed packages are now activated *before* loading the init file.
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As a result of this change, it is no longer necessary to call
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'package-initialize' in your init file.
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Previously, a call to 'package-initialize' was automatically inserted
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into the init file when Emacs was started. This call can now safely
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be removed. Alternatively, if you want to ensure that your init file
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is still compatible with earlier versions of Emacs, change it to:
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(when (< emacs-major-version 27)
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(package-initialize))
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However, if your init file changes the values of 'package-load-list'
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or 'package-user-dir', or sets 'package-enable-at-startup' to nil then
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it won't work right without some adjustment:
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- You can move that code to the early init file (see above), so those
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settings apply before Emacs tries to activate the packages.
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- You can use the new 'package-quickstart' so activation of packages
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does not need to pay attention to 'package-load-list' or
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'package-user-dir' any more.
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** Emacs now notifies systemd when startup finishes or shutdown begins.
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Units that are ordered after 'emacs.service' will only be started
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after Emacs has finished initialization and is ready for use, and
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Emacs needs to be built with systemd support. (If your Emacs is
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installed in a non-standard location and you copied the "emacs.service"
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file to e.g. "~/.config/systemd/user/", you will need to copy the new
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version of the file again.)
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* Changes in Emacs 27.1
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** Emacs now supports Unicode Standard version 13.0.
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** Emacs now supports resizing and rotating images without ImageMagick.
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All modern systems support this feature. (On GNU and Unix systems,
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Cairo drawing or the XRender extension to X11 is required for this to
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be available; the configure script will test for it and, if found,
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enable scaling.)
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The new function 'image-transforms-p' can be used to test whether any
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given frame supports these capabilities.
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** The Network Security Manager now allows more fine-grained control
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of what checks to run via the 'network-security-protocol-checks'
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user option.
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** TLS connections have their security tightened by default.
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Most of the checks for outdated, believed-to-be-weak TLS algorithms
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and ciphers are now switched on by default. (In addition, several new
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TLS weaknesses are now warned about.) By default, the NSM will
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flag connections using these weak algorithms and ask users whether to
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allow them. To get the old behavior back (where certificates are
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checked for validity, but no warnings about weak cryptography are
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issued), you can either set 'network-security-protocol-checks' to nil,
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or adjust the elements in that user option to only happen on the 'high'
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security level (assuming you use the 'medium' level).
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** New user option 'nsm-trust-local-network'.
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Allows skipping Network Security Manager checks for hosts on your
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local subnet(s). It defaults to nil. Usually, there should be no
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need to set this non-nil, and doing that risks opening your local
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network connections to attacks. So be sure you know what you are
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doing before changing the value.
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** Native GnuTLS connections can now use client certificates.
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Previously, this support was only available when using the external
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'gnutls-cli' or 'starttls' command. Call 'open-network-stream' with
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':client-certificate t' to trigger looking up of per-server
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certificates via 'auth-source'.
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** New user option 'network-stream-use-client-certificates'.
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When non-nil, 'open-network-stream' performs lookups of client
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certificates using 'auth-source' as if ':client-certificate t' were
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specified if there is no explicit ':client-certificate' parameter.
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Defaults to nil.
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** 'next/previous-multiframe-window' have been renamed.
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The new names are as follows:
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'next-multiframe-window' -> 'next-window-any-frame'
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'previous-multiframe-window' -> 'previous-window-any-frame'
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The old function names are maintained as aliases for backward
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compatibility.
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** emacsclient
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*** emacsclient now supports the 'EMACS_SOCKET_NAME' environment variable.
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The command-line argument '--socket-name' overrides it.
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(The same behavior as for the pre-existing 'EMACS_SERVER_FILE' variable.)
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*** Emacs and emacsclient now default to "$XDG_RUNTIME_DIR/emacs".
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This is used as the directory for client/server sockets, if Emacs is
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running on a platform or environment that sets the 'XDG_RUNTIME_DIR'
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environment variable to indicate where session sockets should go.
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To get the old, less-secure behavior, you can set the
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'EMACS_SOCKET_NAME' environment variable to an appropriate value.
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*** When run by root, emacsclient no longer connects to non-root sockets.
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(Instead you can use Tramp methods to run root commands in a non-root Emacs.)
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** 'xft-ignore-color-fonts' now ignores even more color fonts.
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There are color fonts that managed to bypass the existing checks,
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causing XFT crashes, they are now filtered out. Setting
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'xft-ignore-color-fonts' to nil removes those checks, which might
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require setting 'face-ignored-fonts' to filter out problematic fonts.
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Known problematic fonts are "Noto Color Emoji" and "Emoji One".
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** The GTK+ font chooser now respects 'face-ignored-fonts'.
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When using 'menu-set-font' under GTK3, the available fonts are now
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matched against 'face-ignored-fonts'.
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** The GTK+ font chooser now remembers the previously selected settings.
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It now remembers the name, size, style, etc.
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** New user option 'what-cursor-show-names'.
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When non-nil, 'what-cursor-position' will show the name of the character
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in addition to the decimal/hex/octal representation. Default nil.
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** New function 'network-lookup-address-info'.
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This does IPv4 and/or IPv6 address lookups on hostnames.
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** 'network-interface-list' can now return IPv4 and IPv6 addresses.
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IPv4 and IPv6 addresses are now returned by default if available,
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optionally including netmask/broadcast address information.
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** Control of the threshold for using the 'distant-foreground' color.
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The threshold for color distance below which the 'distant-foreground'
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color of the face will be used instead of the foreground color can now
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be controlled via the new variable 'face-near-same-color-threshold'.
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The default value is 30000, as the previously hard-coded threshold.
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** The function 'read-passwd' uses "*" as default character to hide passwords.
|
||
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||
** The function 'read-answer' now accepts not only single character
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answers, but also function keys like 'F1', character events such as
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'C-M-h', and control characters like 'C-h'.
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||
|
||
** Lexical binding is now used by default when evaluating interactive Elisp.
|
||
More specifically, 'lexical-binding' is now used by default for 'M-:'
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and '--eval' (including in evaluations invoked from 'emacsclient' via
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its '--eval' command-line option), as well as in
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'lisp-interaction-mode' and 'ielm-mode', used in the "*scratch*" and
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"*ielm*" buffers.
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We envision that most Lisp code is already either written with
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lexical-binding in mind, or will work unchanged under
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lexical-binding. If, for some reason, your code used in 'M-:' or
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'--eval' doesn't work as result of this change, either modify the code
|
||
to work with lexical binding, or wrap it in an extra level of 'eval'.
|
||
For example, --eval "FORM" becomes --eval "(eval 'FORM)" (note the extra
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quote in 'FORM).
|
||
|
||
** The new user option 'tooltip-resize-echo-area' avoids truncating
|
||
tooltip text on GUI frames when tooltips are displayed in the echo
|
||
area. Instead, it resizes the echo area as needed to accommodate the
|
||
full tool-tip text.
|
||
|
||
** Show mode line tooltips only if the corresponding action applies.
|
||
Customize the user option 'mode-line-default-help-echo' to restore the
|
||
old behavior where the tooltip text is also shown when the
|
||
corresponding action does not apply.
|
||
|
||
** New hook 'server-after-make-frame-hook'.
|
||
This hook is a convenient place to perform initializations in daemon
|
||
mode which require GUI features to be available. One example is
|
||
restoration of the previous session using the desktop.el package: put
|
||
the call to 'desktop-read' in this hook, if you want the GUI settings
|
||
to be restored, or if desktop.el needs to interact with you during
|
||
restoration of the session.
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||
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||
** The functions 'set-frame-height' and 'set-frame-width' are now
|
||
commands, and will set the currently selected frame to the height/
|
||
width specified by the numeric prefix.
|
||
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||
** New function 'logcount' calculates an integer's Hamming weight.
|
||
|
||
** New function 'libxml-available-p'.
|
||
This function returns non-nil if libxml support is both compiled in
|
||
and available at run time. Lisp programs should use this function to
|
||
detect built-in libxml support, instead of testing for that
|
||
indirectly, e.g., by checking that functions like
|
||
'libxml-parse-html-region' return nil.
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||
|
||
** 'libxml-parse-xml-region' and 'libxml-parse-html-region' take
|
||
a parameter that's called DISCARD-COMMENTS, but it really only
|
||
discards the top-level comment. Therefore this parameter is now
|
||
obsolete, and the new utility function 'xml-remove-comments' can be
|
||
used to remove comments before calling the libxml functions to parse
|
||
the data.
|
||
|
||
** A new DOM (the XML/HTML document structure returned by functions
|
||
such as 'libxml-parse-html-region') traversal function has been added:
|
||
'dom-search', which takes a DOM and a predicate and returns all nodes
|
||
that match.
|
||
|
||
** New function 'fill-polish-nobreak-p', to be used in 'fill-nobreak-predicate'.
|
||
It blocks line breaking after a one-letter word, also in the case when
|
||
this word is preceded by a non-space, but non-alphanumeric character.
|
||
|
||
** The limit on repetitions in regexps has been raised to 2^16-1.
|
||
It was previously limited to 2^15-1. For example, the following
|
||
regular expression was previously invalid, but is now accepted:
|
||
|
||
x\{32768\}
|
||
|
||
** The German prefix and postfix input methods now support Capital sharp S.
|
||
|
||
** New input methods 'hawaiian-postfix' and 'hawaiian-prefix'.
|
||
|
||
** New input methods 'georgian-qwerty' and 'georgian-nuskhuri'.
|
||
|
||
** New input methods for several variants of the Sami language.
|
||
The Sami input methods include: 'norwegian-sami-prefix',
|
||
'bergsland-hasselbrink-sami-prefix', 'southern-sami-prefix',
|
||
'ume-sami-prefix', 'northern-sami-prefix', 'inari-sami-prefix',
|
||
'skolt-sami-prefix', and 'kildin-sami-prefix'.
|
||
|
||
** Japanese environments use UTF-8 by default.
|
||
In Japanese environments that do not specify encodings and are not
|
||
based on MS-Windows, the default encoding is now utf-8 instead of
|
||
japanese-iso-8bit.
|
||
|
||
** New function 'exec-path'.
|
||
This function by default returns the value of the corresponding
|
||
user option, but can optionally return the equivalent of 'exec-path'
|
||
from a remote host.
|
||
|
||
** The function 'executable-find' supports an optional argument REMOTE.
|
||
This triggers searching for the program on the remote host as indicated by
|
||
'default-directory'.
|
||
|
||
** New user option 'auto-save-no-message'.
|
||
When set to t, no message will be shown when auto-saving (default
|
||
value: nil).
|
||
|
||
** The value of 'make-cursor-line-fully-visible' can now be a function.
|
||
In addition to nil or non-nil, the value can now be a predicate
|
||
function. Follow mode uses this to control scrolling of its windows
|
||
when the last screen line in a window is not fully visible.
|
||
|
||
** New variable 'emacs-repository-branch'.
|
||
It reports the git branch from which Emacs was built.
|
||
|
||
** New user option 'switch-to-buffer-obey-display-actions'.
|
||
When non-nil, 'switch-to-buffer' uses 'pop-to-buffer-same-window' that
|
||
respects display actions specified by 'display-buffer-alist' and
|
||
'display-buffer-overriding-action'.
|
||
|
||
** The user option 'switch-to-visible-buffer' is now obsolete.
|
||
Customize 'switch-to-prev-buffer-skip' instead.
|
||
|
||
** New user option 'switch-to-prev-buffer-skip'.
|
||
This user option allows specifying the set of buffers that may be
|
||
shown by 'switch-to-prev-buffer' and 'switch-to-next-buffer' more
|
||
stringently than the now obsolete 'switch-to-visible-buffer'.
|
||
|
||
** New 'flex' completion style.
|
||
An implementation of popular "flex/fuzzy/scatter" completion which
|
||
matches strings where the pattern appears as a subsequence. Put
|
||
simply, makes "foo" complete to both "barfoo" and "frodo". Add 'flex'
|
||
to 'completion-styles' or 'completion-category-overrides' to use it.
|
||
|
||
** The 'completion-common-part' face is now visible by default.
|
||
|
||
** New face attribute ':extend' to control face extension at EOL.
|
||
The new face attribute ':extend' controls whether to use the face for
|
||
displaying the empty space beyond end of line (EOL) till the edge of
|
||
the window. By default, this attribute is non-nil only for a small
|
||
number of faces, notably, 'region'; any other face that crosses end of
|
||
line will not affect the display of the empty space at EOL. This is
|
||
to make Emacs behave more like other GUI applications with respect to
|
||
displaying faces that cross line boundaries.
|
||
|
||
This attribute behaves specially when theme definitions are applied:
|
||
if the theme doesn't specify an explicit value of this attribute for a
|
||
face, the value from the original face definition is inherited.
|
||
Consequently, a theme generally shouldn't specify this attribute
|
||
unless it has a good reason to do so.
|
||
|
||
** Connection-local variables
|
||
*** Connection-local variables are applied by default like file-local
|
||
and directory-local variables.
|
||
|
||
*** The macro 'with-connection-local-variables' has been renamed from
|
||
'with-connection-local-profiles'. No argument PROFILES needed any longer.
|
||
|
||
** New user option 'next-error-verbose' controls when 'next-error'
|
||
outputs a message about the error locus.
|
||
|
||
** New user option 'grep-search-path' defines the directories searched for
|
||
grep hits (this used to be controlled by 'compilation-search-path').
|
||
|
||
** New user option 'emacs-lisp-compilation-search-path' defines the
|
||
directories searched for byte-compiler error messages (this used to
|
||
be controlled by 'compilation-search-path').
|
||
|
||
** Multicolor fonts such as "Noto Color Emoji" can be displayed on
|
||
Emacs configured with Cairo drawing and linked with cairo >= 1.16.0.
|
||
|
||
** Emacs now optionally displays a fill column indicator.
|
||
This is similar to what 'fill-column-indicator' package provides, but
|
||
much faster and compatible with 'show-trailing-whitespace'.
|
||
|
||
Customize the buffer-local user options 'display-fill-column-indicator'
|
||
and 'display-fill-column-indicator-character' to activate the
|
||
indicator.
|
||
|
||
The indicator is not displayed at all in minibuffer windows and
|
||
in tooltips, as it is not useful there.
|
||
|
||
There are 2 new buffer local variables and 1 face to customize this
|
||
mode, they are described in the manual "(emacs) Display".
|
||
|
||
** 'progress-reporter-update' now accepts an optional suffix string to display.
|
||
|
||
** New user option 'xref-file-name-display' controls the display of
|
||
file names in xref buffers.
|
||
|
||
** New user option 'byte-count-to-string-function'.
|
||
It is used for displaying file sizes and disk space in some cases.
|
||
|
||
** Emacs now interprets RGB triplets like HTML, SVG, and CSS do.
|
||
The X convention previously used differed slightly, particularly for
|
||
RGB triplets with a single hexadecimal digit per component.
|
||
|
||
** The toolbar now shows the equivalent key binding in its tooltips.
|
||
|
||
** The File menu-bar menu was re-arranged.
|
||
Print menu items moved to submenu, and also added the new entries for tabs.
|
||
|
||
** 'scroll-lock-mode' is now bound to the 'Scroll_Lock' key globally.
|
||
Note that this key binding will not work on MS-Windows systems if
|
||
'w32-scroll-lock-modifier' is non-nil.
|
||
|
||
** 'global-set-key', called interactively, now no longer downcases a
|
||
key binding with an upper case letter - if you can type it, you can
|
||
bind it.
|
||
|
||
** 'read-from-minibuffer' now works with buffer-local history variables.
|
||
The HIST argument of 'read-from-minibuffer' now works correctly with
|
||
buffer-local variables. This means that different buffers can have
|
||
their own separated input history list if desired.
|
||
|
||
** 'backup-by-copying-when-privileged-mismatch' applies to file gid, too.
|
||
In addition to checking the file owner uid, Emacs also checks that the
|
||
group gid is not greater than 'backup-by-copying-when-privileged-mismatch';
|
||
if so, 'backup-by-copying-when-mismatch' will be forced on.
|
||
|
||
|
||
* Editing Changes in Emacs 27.1
|
||
|
||
** When asked to visit a large file, Emacs now offers to visit it literally.
|
||
Previously, Emacs would only ask for confirmation before visiting
|
||
large files. Now it also offers a third alternative: to visit the
|
||
file literally, as in 'find-file-literally', which speeds up
|
||
navigation and editing of large files.
|
||
|
||
** 'zap-to-char' now uses the history of characters you used to zap to.
|
||
'zap-to-char' uses the new 'read-char-from-minibuffer' function to allow
|
||
navigating through the history of characters that have been input.
|
||
This is mostly useful for characters that have complex input methods
|
||
where inputting the character again may involve many keystrokes.
|
||
|
||
** 'save-some-buffers' now has a new action in the prompt: 'C-f' will
|
||
exit the command and switch to the buffer currently being asked about.
|
||
|
||
** More commands support noncontiguous rectangular regions, namely
|
||
'upcase-dwim', 'downcase-dwim', 'capitalize-dwim', 'capitalize-region',
|
||
'upcase-initials-region', 'replace-string', 'replace-regexp', and
|
||
'delimit-columns-region'.
|
||
|
||
** The new 'amalgamating-undo-limit' variable can be used to control
|
||
how many changes should be amalgamated when using the 'undo' command.
|
||
|
||
** The 'newline-and-indent' command (commonly bound to 'RET' in many
|
||
modes) now takes an optional numeric argument to specify how many
|
||
times is should insert newlines (and indent).
|
||
|
||
** New command 'make-empty-file'.
|
||
|
||
** New variable 'x-wait-for-event-timeout'.
|
||
This controls how long Emacs will wait for updates to the graphical
|
||
state to take effect (making a frame visible, for example).
|
||
|
||
** New user option 'electric-quote-replace-double'.
|
||
This option controls whether '"' is replaced in 'electric-quote-mode',
|
||
in addition to other quote characters. If non-nil, ASCII double-quote
|
||
characters that quote text "like this" are replaced by double
|
||
typographic quotes, “like this”, in text modes, and in comments in
|
||
non-text modes.
|
||
|
||
** New user option 'flyspell-case-fold-duplications'.
|
||
This option controls whether Flyspell mode considers consecutive words
|
||
to be duplicates if they are not in the same case. If non-nil, the
|
||
default, words are considered to be duplicates even if their letters'
|
||
case does not match.
|
||
|
||
** 'write-abbrev-file' now includes special properties.
|
||
'write-abbrev-file' now writes special properties like ':case-fixed'
|
||
for abbrevs that have them.
|
||
|
||
** 'write-abbrev-file' skips empty tables.
|
||
'write-abbrev-file' now skips inserting a 'define-abbrev-table' form for
|
||
tables which do not have any non-system abbrevs to save.
|
||
|
||
** The new functions and commands 'text-property-search-forward' and
|
||
'text-property-search-backward' have been added. These provide an
|
||
interface that's more like functions like 'search-forward'.
|
||
|
||
** 'add-dir-local-variable' now uses dotted pair notation syntax to
|
||
write alists of variables to ".dir-locals.el". This is the same
|
||
syntax that you can see in the example of a ".dir-locals.el" file in
|
||
the node "(emacs) Directory Variables" of the user manual.
|
||
|
||
** Network connections using 'local' can now use IPv6.
|
||
'make-network-process' now uses the correct loopback address when
|
||
asked to use ":host 'local" and ":family 'ipv6".
|
||
|
||
** The new function 'replace-region-contents' replaces the current
|
||
region using a given replacement-function in a non-destructive manner
|
||
(in terms of 'replace-buffer-contents').
|
||
|
||
** The command 'replace-buffer-contents' now has two optional
|
||
arguments mitigating performance issues when operating on huge
|
||
buffers.
|
||
|
||
** Dragging 'C-M-mouse-1' now marks rectangular regions.
|
||
|
||
** The command 'delete-indentation' now operates on the active region.
|
||
If the region is active, the command joins all the lines in the
|
||
region. When there's no active region, the command works on the
|
||
current and the previous or the next line, as before.
|
||
|
||
** You can now change the font size with the mouse wheel.
|
||
Scrolling the mouse wheel with the Ctrl key pressed will now act the
|
||
same as the 'C-x C-+' and 'C-x C--' commands.
|
||
|
||
|
||
* Changes in Specialized Modes and Packages in Emacs 27.1
|
||
|
||
** New HTML mode skeleton 'html-id-anchor'.
|
||
This new command (which inserts an <a id="foo">_</a> skeleton) is
|
||
bound to 'C-c C-c #'.
|
||
|
||
** New command 'font-lock-debug-fontify'.
|
||
This is an interactive convenience function to be used when developing
|
||
font locking for a mode. It recomputes the font locking data and then
|
||
re-fontifies the buffer.
|
||
|
||
** Font Lock is smarter about fontifying unterminated strings and comments.
|
||
When you type a quote that starts a string, or a comment delimiter
|
||
that starts a comment, font-lock will not immediately refontify the
|
||
following characters in 'font-lock-string-face' or
|
||
'font-lock-comment-face'. Instead, it will delay the fontification
|
||
beyond the current line to give you a chance to close the string or
|
||
comment. This is controlled by the new user option
|
||
'jit-lock-antiblink-grace', which specifies the delay in seconds. The
|
||
default is 2 seconds; set to nil to get back the old behavior.
|
||
|
||
** The 'C' command in 'tar-mode' will now preserve the timestamp of
|
||
the extracted file if the new user option 'tar-copy-preserve-time' is
|
||
non-nil.
|
||
|
||
** 'autoconf-mode' is now used instead of 'm4-mode' for the
|
||
"acinclude.m4" / "aclocal.m4" / "acsite.m4" files.
|
||
|
||
** On GNU/Linux, 'M-x battery' will now list all batteries, no matter
|
||
what they're named, and the 'battery-linux-sysfs-regexp' variable has
|
||
been removed.
|
||
|
||
** The 'list-processes' command now includes port numbers in the
|
||
network connection information (in addition to the host name).
|
||
|
||
** The 'cl' package is now officially deprecated in favor of 'cl-lib'.
|
||
|
||
** desktop
|
||
|
||
*** When called interactively with a prefix arg 'C-u', 'desktop-read'
|
||
now prompts the user for the directory containing the desktop file.
|
||
|
||
** display-line-numbers-mode
|
||
|
||
*** New faces 'line-number-major-tick' and 'line-number-minor-tick',
|
||
and user options 'display-line-numbers-major-tick' and
|
||
'display-line-numbers-minor-tick' can be used to highlight the line
|
||
numbers of lines multiple of certain numbers.
|
||
|
||
*** New variable 'display-line-numbers-offset', when non-zero, adds
|
||
an offset to absolute line numbers.
|
||
|
||
** winner
|
||
|
||
*** A new user option, 'winner-boring-buffers-regexp', has been added.
|
||
|
||
** table
|
||
|
||
*** 'table-generate-source' now supports wiki and mediawiki.
|
||
This command can now output wiki and mediawiki format tables.
|
||
|
||
** telnet-mode
|
||
|
||
*** Reverting a buffer in 'telnet-mode' will restart a closed connection.
|
||
|
||
** goto-addr
|
||
|
||
*** A way to more conveniently specify what URI address schemes should
|
||
be ignored has been added via the 'goto-address-uri-schemes-ignored'
|
||
variable.
|
||
|
||
** tex-mode
|
||
|
||
*** 'latex-noindent-commands' controls indentation of certain commands.
|
||
You can use this new user option to control indentation of arguments of
|
||
\emph, \footnote, and similar commands.
|
||
|
||
** byte compiler
|
||
|
||
*** 'byte-compile-dynamic' is now obsolete.
|
||
This is because on the one hand it suffers from misbehavior in corner
|
||
cases that have plagued it for years, and on the other hand experience
|
||
indicates that it doesn't bring any measurable benefit.
|
||
|
||
*** The 'g' keystroke in "*Compile-Log*" buffers has been bound to a
|
||
new command that will recompile the file previously compiled with 'M-x
|
||
byte-compile-file' and the like.
|
||
|
||
** compile.el
|
||
|
||
*** In 'compilation-error-regexp-alist', 'line' (and 'end-line') can
|
||
be functions.
|
||
|
||
*** 'compilation-context-lines' can now take the value t; this is like
|
||
nil, but instead of scrolling the current line to the top of the
|
||
screen when there is no left fringe, it inserts a visible arrow before
|
||
column zero.
|
||
|
||
*** The new 'compilation-transform-file-match-alist' user option can
|
||
be used to transform file name matches compilation output, and remove
|
||
known false positives being recognized as warnings/errors.
|
||
|
||
** cl-lib.el
|
||
|
||
*** 'cl-defstruct' has a new ':noinline' argument to prevent inlining
|
||
its functions.
|
||
|
||
*** 'cl-defstruct' slots accept a ':documentation' property.
|
||
|
||
*** 'cl-values-list' will now signal an error if its argument isn't a list.
|
||
|
||
** doc-view.el
|
||
|
||
*** New commands 'doc-view-presentation' and 'doc-view-fit-window-to-page'.
|
||
|
||
*** Added support for password-protected PDF files.
|
||
|
||
*** A new user option 'doc-view-pdftotext-program-args' has been added
|
||
to allow controlling how the conversion to text is done.
|
||
|
||
*** The prefix key 's' was changed to 'c' for slicing commands
|
||
to avoid conflicts with 'image-mode' key 's'. The new key 'c' still
|
||
has good mnemonics of "cut", "clip", "crop".
|
||
|
||
** Ido
|
||
|
||
*** New user option 'ido-big-directories' to mark directories whose
|
||
names match certain regular expressions as big. Ido won't attempt to
|
||
list the contents of such directories when completing file names.
|
||
|
||
** Minibuffer
|
||
|
||
*** New user option 'minibuffer-beginning-of-buffer-movement'.
|
||
This option allows control of how the 'M-<' command works in
|
||
the minibuffer. If non-nil, point will move to the end of the prompt
|
||
(if point is after the end of the prompt). The default is nil, which
|
||
preserves the original behavior of 'M-<' moving to the beginning of
|
||
the prompt.
|
||
|
||
*** When the minibuffer is active, echo-area messages are displayed at
|
||
the end of the minibuffer instead of hiding the minibuffer by the echo
|
||
area display. The new user option 'minibuffer-message-clear-timeout'
|
||
controls how messages displayed in this situation are removed from the
|
||
minibuffer. To revert to previous behavior, where echo-area messages
|
||
temporarily overwrote the minibuffer contents until the user typed
|
||
something, set 'set-message-function' and 'clear-message-function' to
|
||
nil.
|
||
|
||
*** Minibuffer now uses 'minibuffer-message' to display error messages
|
||
at the end of the active minibuffer. To disable this, remove
|
||
'minibuffer-error-initialize' from 'minibuffer-setup-hook'.
|
||
|
||
*** 'y-or-n-p' now uses the minibuffer to read 'y' or 'n' answer.
|
||
|
||
*** Some commands that previously used 'read-char-choice' now read
|
||
a character using the minibuffer by 'read-char-from-minibuffer'.
|
||
|
||
** map.el
|
||
|
||
*** Now also understands plists.
|
||
*** Now defined via generic functions that can be extended via 'cl-defmethod'.
|
||
*** Deprecate the 'map-put' macro in favor of a new 'map-put!' function.
|
||
*** 'map-contains-key' now returns a boolean rather than the key.
|
||
*** Deprecate the 'testfn' args of 'map-elt' and 'map-contains-key'.
|
||
*** New generic function 'map-insert'.
|
||
*** The 'type' arg can be a list '(hash-table :key1 VAL1 :key2 VAL2 ...)'.
|
||
|
||
** seq.el
|
||
New convenience functions 'seq-first' and 'seq-rest' give easy access
|
||
to respectively the first and all but the first elements of sequences.
|
||
|
||
The new predicate function 'seq-contains-p' should be used instead of
|
||
the now obsolete 'seq-contains'.
|
||
|
||
** Follow mode
|
||
In the current follow group of windows, "ghost" cursors are no longer
|
||
displayed in the non-selected follow windows. To get the old behavior
|
||
back, customize 'follow-hide-ghost-cursors' to nil.
|
||
|
||
** New variable 'warning-fill-column' for 'display-warning'.
|
||
|
||
** Windmove
|
||
|
||
*** 'windmove-create-window' when non-nil makes a new window.
|
||
This happens upon moving off the edge of the frame.
|
||
|
||
*** Windmove supports directional window display and selection.
|
||
The new command 'windmove-display-default-keybindings' binds default
|
||
keys with provided modifiers (by default, Shift-Meta) to the commands
|
||
that display the next buffer in the window at the specified direction.
|
||
This is like 'windmove-default-keybindings' that binds keys to commands
|
||
that select the window in the specified direction, but additionally it
|
||
displays the buffer from the next command in that window. For example,
|
||
'S-M-right C-h i' displays the "*Info*" buffer in the right window,
|
||
creating the window if necessary. A special key can be customized to
|
||
display the buffer in the same window, for example, 'S-M-0 C-h e'
|
||
displays the "*Messages*" buffer in the same window. 'S-M-t C-h r'
|
||
displays the Emacs manual in a new tab.
|
||
|
||
*** Windmove also supports directional window deletion.
|
||
The new command 'windmove-delete-default-keybindings' binds default
|
||
keys with provided prefix (by default, 'C-x') and modifiers (by default,
|
||
'Shift') to the commands that delete the window in the specified
|
||
direction. For example, 'C-x S-down' deletes the window below.
|
||
With a prefix arg 'C-u', also kills the buffer in that window.
|
||
With 'M-0', deletes the selected window and selects the window
|
||
that was in the specified direction.
|
||
|
||
*** New command 'windmove-swap-states-in-direction' binds default keys
|
||
to the commands that swap the states of the selected window with the
|
||
window in the specified direction.
|
||
|
||
*** Windmove code no longer used is now obsolete.
|
||
That includes the user option 'windmove-window-distance-delta' and the
|
||
functions 'windmove-coord-add', 'windmove-constrain-to-range',
|
||
'windmove-constrain-around-range', 'windmove-frame-edges',
|
||
'windmove-constrain-loc-for-movement', 'windmove-wrap-loc-for-movement',
|
||
'windmove-reference-loc' and 'windmove-other-window-loc'.
|
||
|
||
** Octave mode
|
||
The mode is automatically enabled in files that start with the
|
||
'function' keyword.
|
||
|
||
** project.el
|
||
|
||
*** New commands 'project-search' and 'project-query-replace-regexp'.
|
||
|
||
*** New user option 'project-read-file-name-function'.
|
||
|
||
** Etags
|
||
|
||
*** 'next-file' is now an obsolete alias of 'tags-next-file'.
|
||
|
||
*** 'tags-loop-revert-buffers' is an obsolete alias of
|
||
'fileloop-revert-buffers'.
|
||
|
||
*** The 'tags-loop-continue' function along with the
|
||
'tags-loop-operate' and 'tags-loop-scan' variables are now obsolete;
|
||
use the new 'fileloop-initialize' and 'fileloop-continue' functions
|
||
instead.
|
||
|
||
*** etags is now able to read Zstandard-compressed files.
|
||
|
||
** bibtex
|
||
|
||
*** New commands 'bibtex-next-entry' and 'bibtex-previous-entry'.
|
||
In 'bibtex-mode-map', 'forward-paragraph' and 'backward-paragraph' are
|
||
remapped to these, respectively.
|
||
|
||
** Dired
|
||
|
||
*** New command 'dired-create-empty-file'.
|
||
|
||
*** New command 'dired-number-of-marked-files'.
|
||
It is by default bound to '* N'.
|
||
|
||
*** The marking commands now report how many files were marked by the
|
||
command itself, not how many files are marked in total.
|
||
|
||
*** The new user option 'dired-create-destination-dirs' controls whether
|
||
'dired-do-copy' and 'dired-rename-file' should create non-existent
|
||
directories in the destination.
|
||
|
||
*** 'dired-dwim-target' can be customized to prefer either the next window,
|
||
or one of the most recently visited windows with a Dired buffer.
|
||
|
||
*** When the new user option 'dired-vc-rename-file' is non-nil,
|
||
Dired performs file renaming using underlying version control system.
|
||
|
||
*** Zstandard compression is now supported for 'dired-do-compress' and
|
||
'dired-do-compress-to'.
|
||
|
||
*** On systems that support suid/guid files, Dired now fontifies the
|
||
permissions of such files with a special face 'dired-set-id'.
|
||
|
||
*** A new face, 'dired-special', is used to highlight sockets, named
|
||
pipes, block devices and character devices.
|
||
|
||
** Find-Dired
|
||
|
||
*** New user option 'find-dired-refine-function'.
|
||
The default value is 'find-dired-sort-by-filename'.
|
||
|
||
*** New sorting options for the user option 'find-ls-option'.
|
||
|
||
** Change Logs and VC
|
||
|
||
*** New user option 'vc-tor'.
|
||
When non-nil, this user option causes the VC commands to communicate
|
||
with the repository via Tor's proxy, using the 'torsocks' wrapper
|
||
script. The default is nil.
|
||
|
||
*** New command 'log-edit-generate-changelog-from-diff', bound to 'C-c C-w'.
|
||
This generates ChangeLog entries from the VC fileset diff.
|
||
|
||
*** Recording ChangeLog entries doesn't require an actual file.
|
||
If a ChangeLog file doesn't exist, and if the new user option
|
||
'add-log-dont-create-changelog-file' is non-nil (which is the
|
||
default), commands such as 'C-x 4 a' will add log entries to a
|
||
suitable named temporary buffer. (An existing ChangeLog file will
|
||
still be used if it exists.) Set the user option to nil to get the
|
||
previous behavior of always creating a buffer that visits a ChangeLog
|
||
file.
|
||
|
||
*** The new 'd' command ('vc-dir-clean-files') in 'vc-dir-mode'
|
||
buffers will delete the marked files (or if no files are marked, the
|
||
file under point). This command does not notify the VC backend, and
|
||
is mostly useful for unregistered files.
|
||
|
||
*** 'vc-dir-ignore' now takes a prefix argument to ignore all marked files.
|
||
|
||
*** New user option 'vc-git-grep-template'.
|
||
This new user option allows customizing the default arguments passed to
|
||
'git-grep' when 'vc-git-grep' is used.
|
||
|
||
*** Command 'vc-git-stash' now respects marks in the "*vc-dir*" buffer.
|
||
When some files are marked, only those are stashed.
|
||
When no files are marked, all modified files are stashed, as before.
|
||
|
||
*** 'vc-dir' now shows a button allowing you to hide the stash list.
|
||
Controlled by user option 'vc-git-show-stash'. Default t means show
|
||
the entire list as before. An integer value limits the list length
|
||
(but still allows you to show the entire list via the button).
|
||
|
||
*** 'vc-git-stash' is now bound to 'C' in the stash headers.
|
||
|
||
*** Some stash keybindings are now available in the stash button.
|
||
'vc-git-stash' and 'vc-git-stash-snapshot' can now be run using 'C'
|
||
and 'S' respectively, including when there are no stashes.
|
||
|
||
*** The new hook 'vc-retrieve-tag-hook' runs after retrieving a tag.
|
||
|
||
*** 'vc-hg' now invokes 'smerge-mode' when visiting files.
|
||
Code that attempted to invoke 'smerge-mode' when visiting an Hg file
|
||
with conflicts existed in earlier versions of Emacs, but incorrectly
|
||
never detected a conflict due to invalid assumptions about cached
|
||
values.
|
||
|
||
*** The Hg (Mercurial) back-end now supports 'vc-region-history'.
|
||
The 'C-x v h' command now works in buffers that visit files controlled
|
||
by Hg.
|
||
|
||
*** The Hg (Mercurial) back-end now prompts for revision to merge when
|
||
you invoke 'C-x v m' ('vc-merge').
|
||
|
||
*** The Hg (Mercurial) back-end now uses tags, branches and bookmarks
|
||
instead of revision numbers as completion candidates when it prompts
|
||
for a revision.
|
||
|
||
*** New user option 'vc-hg-revert-switches'.
|
||
It specifies switches to pass to Hg's 'revert' command.
|
||
|
||
*** 'C-u C-x v D' ('vc-root-version-diff') prompts for two revisions
|
||
and compares their entire trees.
|
||
|
||
*** 'C-x v M D' ('vc-diff-mergebase') and 'C-x v M L' ('vc-log-mergebase')
|
||
print diffs and logs between the merge base (common ancestor) of two
|
||
given revisions.
|
||
|
||
*** New command 'vc-log-search' asks for a pattern, searches it
|
||
in the revision log, and displays matched log entries in the
|
||
log buffer. For example, 'M-x vc-log-search RET bug#36644 RET'
|
||
displays all entries whose log messages match the bug number.
|
||
With a prefix argument asks for a command, so for example,
|
||
'C-u M-x vc-log-search RET git log -1 f302475 RET' will display
|
||
just one log entry found by its revision number.
|
||
|
||
*** It is now possible to display a specific revision given by its ID.
|
||
If you invoke 'C-x v L' ('vc-print-root-log') with a numeric argument
|
||
of 1, as in 'C-1 C-x v L' or 'C-u 1 C-x v L', it asks for a revision
|
||
ID, and shows its log entry together with the diffs introduced by the
|
||
revision's commit. (For some less capable VCSes, only the log entry
|
||
is shown.)
|
||
|
||
*** New user option 'vc-find-revision-no-save'.
|
||
With non-nil, 'vc-find-revision' doesn't write the created buffer to file.
|
||
|
||
*** 'C-x v =' can now mimic Magit's diff format.
|
||
Set the new user option 'diff-font-lock-prettify' to t for that, see
|
||
below under "Diff mode".
|
||
|
||
*** The 'diff' function arguments OLD and NEW may each be a buffer
|
||
rather than a file, in non-interactive calls. This change was made in
|
||
Emacs 24.1, but wasn't documented until now.
|
||
|
||
*** New command 'diff-buffers' interactively diffs two buffers.
|
||
|
||
** Diff mode
|
||
|
||
*** Hunks are now automatically refined by font-lock.
|
||
To disable refinement, set the new user option 'diff-refine' to nil.
|
||
To get back the old behavior where hunks are refined as you navigate
|
||
through a diff, set 'diff-refine' to the symbol 'navigate'.
|
||
|
||
*** 'diff-auto-refine-mode' is deprecated in favor of 'diff-refine'.
|
||
It is no longer enabled by default and binding it no longer has any
|
||
effect.
|
||
|
||
*** Better syntax highlighting of Diff hunks.
|
||
Fragments of source in Diff hunks are now by default highlighted
|
||
according to the appropriate major mode. Customize the new user
|
||
option 'diff-font-lock-syntax' to nil to disable this.
|
||
|
||
*** File headers can be shortened, mimicking Magit's diff format.
|
||
To enable it, set the new user option 'diff-font-lock-prettify' to t.
|
||
On GUI frames, this option also displays the insertion and deletion
|
||
indicators on the left fringe.
|
||
|
||
*** Prefix arg of 'diff-goto-source' means jump to the old revision
|
||
of the file under version control if point is on an old changed line,
|
||
or to the new revision of the file otherwise.
|
||
|
||
** Texinfo
|
||
|
||
*** New function for inserting '@pxref', '@xref', or '@ref' commands.
|
||
The function 'texinfo-insert-dwim-@ref', bound to 'C-c C-c r' by
|
||
default, inserts one of three types of references based on the text
|
||
surrounding point, namely '@pxref' near a parenthesis, '@xref' at the
|
||
start of a sentence or at '(point-min)', else '@ref'.
|
||
|
||
** Browse-url
|
||
|
||
*** The function 'browse-url-emacs' can now visit a URL in selected window.
|
||
It now treats the optional 2nd argument to mean that the URL should be
|
||
shown in the currently selected window.
|
||
|
||
*** A new function, 'browse-url-add-buttons' can be used to add clickable
|
||
links to most ordinary special-mode buffers that display text that
|
||
have URLs embedded. 'browse-url-button-regexp' controls what's
|
||
considered a button.
|
||
|
||
*** New user option 'browse-url-secondary-browser-function'.
|
||
It can be set to a function that invokes an alternative browser.
|
||
|
||
** Comint
|
||
|
||
*** 'send-invisible' is now an obsolete alias for 'comint-send-invisible'.
|
||
Also, 'shell-strip-ctrl-m' is declared obsolete.
|
||
|
||
*** 'C-c .' ('comint-insert-previous-argument') no longer interprets '&'.
|
||
This feature caused problems when '&&' was present in the previous
|
||
command. Since this command emulates 'M-.' in Bash and zsh, neither
|
||
of which treats '&' specially, the feature was removed for
|
||
compatibility with these shells.
|
||
|
||
*** 'comint-insert-previous-argument' can now count arguments from the end.
|
||
By default, invoking 'C-c .' with a numeric argument N would copy the
|
||
Nth argument, counting from the first one. But if the new user option
|
||
'comint-insert-previous-argument-from-end' is non-nil, it will copy
|
||
the Nth argument counting from the last one. Thus 'C-c .' can now
|
||
better emulate 'M-.' in both Bash and zsh, since the former counts
|
||
from the beginning of the arguments, while the latter counts from the
|
||
end.
|
||
|
||
*** 'comint-run' can now accept a list of switches to pass to the program.
|
||
'C-u M-x comint-run' will prompt for the switches interactively.
|
||
|
||
*** Abnormal hook 'comint-password-function' has been added.
|
||
This hook permits a derived mode to supply a password for the
|
||
underlying command interpreter without prompting the user. For
|
||
example, in 'sql-mode', the password for connecting to the database may
|
||
be stored in the connection wallet and may be passed on the command
|
||
line to start the SQL interpreter. This is a potential security flaw
|
||
that could expose user's database passwords on the command line
|
||
through the use of a process list (Bug#8427). With this hook, it is
|
||
possible to not pass the password on the command line and wait for the
|
||
program to prompt for the password. When it does so, the password can
|
||
be supplied to the SQL interpreter without involving the user just as
|
||
if it had been supplied on the command line.
|
||
|
||
** SQL
|
||
|
||
*** SQL Indent Minor Mode
|
||
SQL Mode now supports the ELPA 'sql-indent' package for assisting
|
||
sophisticated SQL indenting rules. Note, however, that SQL is not
|
||
like other programming languages like C, Java, or Python where code is
|
||
sparse and rules for formatting are fairly well established. Instead
|
||
SQL is more like COBOL (from which it came) and code tends to be very
|
||
dense and line ending decisions driven by syntax and line length
|
||
considerations to make readable code. Experienced SQL developers may
|
||
prefer to rely upon existing Emacs facilities for formatting code but
|
||
the 'sql-indent' package provides facilities to aid more casual SQL
|
||
developers layout queries and complex expressions.
|
||
|
||
**** 'sql-use-indent-support' (default t) enables SQL indentation support.
|
||
The 'sql-indent' package from ELPA must be installed to get the
|
||
indentation support in 'sql-mode' and 'sql-interactive-mode'.
|
||
|
||
**** 'sql-mode-hook' and 'sql-interactive-mode-hook' changed.
|
||
Both hook variables have had 'sql-indent-enable' added to their
|
||
default values. If you have existing customizations to these
|
||
variables, you should make sure that the new default entry is
|
||
included.
|
||
|
||
*** Connection Wallet
|
||
Database passwords can now by stored in NETRC or JSON data files that
|
||
may optionally be encrypted. When establishing an interactive session
|
||
with the database via 'sql-connect' or a product specific function,
|
||
like 'sql-mysql' or 'sql-postgres', the password wallet will be
|
||
searched for the password. The 'sql-product', 'sql-server',
|
||
'sql-database', and the 'sql-username' will be used to identify the
|
||
appropriate authorization. This eliminates the discouraged practice of
|
||
embedding database passwords in your Emacs initialization.
|
||
|
||
See the 'auth-source' module for complete documentation on the file
|
||
formats. By default, the wallet file is expected to be in the
|
||
'user-emacs-directory', named "sql-wallet" or ".sql-wallet", with
|
||
".json" (JSON) or no (NETRC) suffix. Both file formats can optionally
|
||
be encrypted with GPG by adding an additional ".gpg" suffix.
|
||
|
||
** Term
|
||
|
||
*** 'term-read-noecho' is now obsolete, use 'read-passwd' instead.
|
||
|
||
*** 'serial-term' now takes an optional parameter to leave the
|
||
emulator in line mode.
|
||
|
||
** Flymake
|
||
|
||
*** The variable 'flymake-diagnostic-types-alist' is obsolete.
|
||
You should instead set properties on known diagnostic symbols, like
|
||
':error' and ':warning', as demonstrated in the Flymake manual.
|
||
|
||
*** New user option 'flymake-start-on-save-buffer'.
|
||
Control whether Flymake starts checking the buffer on save.
|
||
|
||
*** Flymake and backend functions may exchange hints about buffer changes.
|
||
This enables more efficient backends. See the docstring of
|
||
'flymake-diagnostic-functions' or the Flymake manual for details.
|
||
|
||
*** 'flymake-start-syntax-check-on-newline' is now obsolete,
|
||
use 'post-self-insert-hook' to check on newline.
|
||
|
||
** Ruby
|
||
|
||
*** The Rubocop Flymake diagnostic function will only run Lint cops if
|
||
it can't find the config file.
|
||
|
||
*** Rubocop is called with 'bundle exec' if Gemfile mentions it.
|
||
|
||
*** New command 'ruby-find-library-file' bound to 'C-c C-f'.
|
||
|
||
** Package
|
||
|
||
*** Warn if "footer line" is missing, but still install package.
|
||
package.el used to refuse to install a package without the so-called
|
||
"footer line", which appears at the very end of the file:
|
||
|
||
;;; FILENAME ends here
|
||
|
||
package.el will now install packages without this line, but it will
|
||
issue a warning. To avoid this warning, packages should keep the
|
||
"footer line".
|
||
|
||
Note that versions of Emacs older than 27.1 will not only refuse to
|
||
install packages without such a line -- they will be unable to parse
|
||
package data. It is therefore recommended to keep this line.
|
||
|
||
*** Change of 'package-check-signature' for packages with multiple sigs.
|
||
In previous Emacsen, t checked that all signatures are valid.
|
||
Now t only checks that at least one signature is valid and the new 'all'
|
||
value needs to be used if you want to enforce that all signatures
|
||
are valid. This only affects packages with multiple signatures.
|
||
|
||
*** The meaning of 'allow-unsigned' in 'package-check-signature' has
|
||
changed slightly: If a usable OpenPGP configuration can't be found
|
||
(for instance, if gpg isn't installed), it now has the same meaning as
|
||
nil.
|
||
|
||
*** New function 'package-get-version' lets packages query their own version.
|
||
Example use in auctex.el: '(defconst auctex-version (package-get-version))'
|
||
|
||
*** New 'package-quickstart' feature.
|
||
When 'package-quickstart' is non-nil, package.el precomputes a big
|
||
autoloads file so that activation of packages can be done much faster,
|
||
which can speed up your startup significantly.
|
||
It also causes user options like 'package-user-dir' and
|
||
'package-load-list' to be consulted when 'package-quickstart-refresh'
|
||
is run rather than at startup so you don't need to set them in your
|
||
early init file.
|
||
|
||
*** New function 'package-activate-all'.
|
||
|
||
*** New functions for filtering packages list.
|
||
A new function has been added which allows users to filter the
|
||
packages list by name: 'package-menu-filter-by-name'. By default, it
|
||
is bound to '/ n'. Additionally, the function
|
||
'package-menu-filter-by-keyword' has been renamed from
|
||
'package-menu-filter'. Its keybinding has also been changed to '/ k'
|
||
(from 'f'). To clear any of the two filters, the user can now call
|
||
the 'package-menu-clear-filter' function, bound to '/ /' by default.
|
||
|
||
*** Imenu support has been added to 'package-menu-mode'.
|
||
|
||
*** The package list can now be sorted by version or description.
|
||
|
||
*** In Package Menu, 'g' now updates package data from archives.
|
||
Previously, 'g' invoked 'tabulated-list-revert' which did not update
|
||
the cached archive data. It is now bound to 'revert-buffer', which
|
||
will update the data.
|
||
|
||
'package-menu-refresh' is an obsolete alias for 'revert-buffer'.
|
||
|
||
** Info
|
||
|
||
*** Clicking on the left/right arrow icon in the Info tool-bar while
|
||
holding down the Ctrl key pops up a menu of previously visited Info nodes
|
||
where you can select a node to go back (like in browsers).
|
||
|
||
*** Info can now follow 'file://' protocol URLs.
|
||
The 'file://' URLs in Info documents can now be followed by passing
|
||
them to the 'browse-url' function, like the other protocols: 'ftp',
|
||
'http', and 'https'. This allows having references to local HTML
|
||
files, for example.
|
||
|
||
** Display of man pages now limits the width for formatting pages.
|
||
The new user option 'Man-width-max' (80 by default) limits the number
|
||
of columns passed to the 'man' program for formatting man pages. This
|
||
is to enhance readability when man pages are displayed in very wide
|
||
windows (which are customary with today's large displays).
|
||
|
||
** Xref
|
||
|
||
*** New command 'xref-find-definitions-at-mouse'.
|
||
This command finds definitions of the identifier at the place of a
|
||
mouse click event, and is intended to be bound to a mouse event.
|
||
|
||
*** Changing 'xref-marker-ring-length' works after xref.el is loaded.
|
||
Previously, setting 'xref-marker-ring-length' would only take effect
|
||
if set before xref.el was loaded.
|
||
|
||
*** 'xref-find-definitions' now sets the mark at the buffer position
|
||
where it was invoked.
|
||
|
||
*** New xref faces 'xref-file-header', 'xref-line-number', 'xref-match'.
|
||
|
||
*** New user option 'xref-show-definitions-function'.
|
||
It encapsulates the logic pertinent to showing the result of
|
||
'xref-find-definitions'. The user can change it to customize its
|
||
behavior and the display of results.
|
||
|
||
*** Search results show the buffer even for one hit.
|
||
The search-type Xref commands (e.g. 'xref-find-references' or
|
||
'project-find-regexp') now show the results buffer even when there is
|
||
only one hit. This can be altered by changing 'xref-show-xrefs-function'.
|
||
|
||
*** Xref buffers support refreshing the search results.
|
||
A new command 'xref-revert-buffer' is bound to 'g'.
|
||
|
||
*** Imenu support has been added to 'xref--xref-buffer-mode'.
|
||
|
||
*** New generic method 'xref-backend-identifier-completion-ignore-case'.
|
||
Using it, the etags backend now honors 'tags-case-fold-search' during
|
||
identifier completion.
|
||
|
||
** Checkdoc
|
||
|
||
*** Checkdoc can now optionally spell-check doc strings.
|
||
Invoking 'checkdoc-buffer' with a non-nil TAKE-NOTES argument
|
||
(interactively, with a prefix arg) will now spell-check the doc
|
||
strings and report all the spelling mistakes.
|
||
|
||
** Icomplete
|
||
|
||
*** New minor mode Fido mode.
|
||
This mode is based on Icomplete, and its name stands for "Fake Ido".
|
||
The point of this mode is to be an 'ido-mode' workalike, providing
|
||
most of the functionality present in 'ido-mode' that is not in
|
||
Icomplete, which is much more compatible with all of Emacs's
|
||
completion facilities.
|
||
|
||
** Ecomplete
|
||
|
||
*** The Ecomplete sorting has changed to a decay-based algorithm.
|
||
This can be controlled by the new 'ecomplete-sort-predicate' user option.
|
||
|
||
*** The 'ecomplete-database-file' file is now placed in
|
||
"~/.emacs.d/ecompleterc" by default. Of course it will still find it
|
||
if you have it in "~/.ecompleterc".
|
||
|
||
** Gnus
|
||
|
||
*** 'mm-uu-diff-groups-regexp' now defaults to matching all groups,
|
||
which means that "git am" diffs are recognized everywhere.
|
||
|
||
*** Two new Gnus summary mode navigation commands have been added,
|
||
bound to the '[' and ']' keys: 'gnus-summary-prev-unseen-article' and
|
||
'gnus-summary-next-unseen-article'. These take you (respectively) to
|
||
the previous unseen or next unseen article. (These are the ones that
|
||
are marked with "." in the summary mode lines.)
|
||
|
||
*** The Gnus user variable 'nnimap-expunge' supports three new values:
|
||
'never' for never expunging messages, 'immediately' for immediately
|
||
expunging deleted messages, and 'on-exit' to expunge deleted articles
|
||
when exiting the group's summary buffer. Setting 'nnimap-expunge' to
|
||
nil or t is still supported but not recommended, since it may
|
||
result in Gnus expunging all messages that have been flagged as
|
||
deleted by any IMAP client (rather than just those that have been
|
||
deleted by Gnus).
|
||
|
||
*** New user option 'gnus-use-atomic-windows' makes Gnus window layouts atomic.
|
||
See the "(elisp) Atomic Windows" node of the Elisp manual for details.
|
||
|
||
*** There's a new value for 'gnus-article-date-headers',
|
||
'combined-local-lapsed', which will show both the time (in the local
|
||
timezone) and the lapsed time.
|
||
|
||
*** Gnus now maps imaps to 993 only on old MS-Windows versions.
|
||
The nnimap backend used to do this unconditionally to work around
|
||
problems on old versions of MS-Windows. This is now done only for
|
||
Windows XP and older.
|
||
|
||
*** The nnimap backend now has support for IMAP namespaces.
|
||
This feature can be enabled by setting the new 'nnimap-use-namespaces'
|
||
server variable to non-nil.
|
||
|
||
*** A prefix argument to 'gnus-summary-limit-to-score' will limit in reverse.
|
||
Limit to articles with score "at or below" the SCORE argument rather
|
||
than "at or above".
|
||
|
||
*** The function 'gnus-score-find-favorite-words' has been renamed
|
||
from 'gnus-score-find-favourite-words'.
|
||
|
||
*** Gmane has been removed as an nnir backend, since Gmane no longer
|
||
has a search engine.
|
||
|
||
*** Splitting mail on common mailing list headers has been added.
|
||
See the concept index in the Gnus manual for the 'match-list' entry.
|
||
|
||
*** nil is no longer an allowed value for 'mm-text-html-renderer'.
|
||
|
||
*** The default value of 'mm-inline-large-images' has changed from nil
|
||
to 'resize', which means that large images will be resized instead of
|
||
displayed with an external program by default.
|
||
|
||
*** A new Gnus summary mode command, 'S A' ('gnus-summary-attach-article')
|
||
can be used to attach the current article(s) to a pre-existing Message
|
||
buffer, or create a new Message buffer with the article(s) attached.
|
||
|
||
*** A new Gnus summary mode command, 'w' ('gnus-summary-browse-url')
|
||
scans the article buffer for URLs, and offers them to the user to open
|
||
with 'browse-url'.
|
||
|
||
*** New user option 'nnir-notmuch-filter-group-names-function'.
|
||
This option controls whether and how to use Gnus search groups as
|
||
'path:' search terms to 'notmuch'.
|
||
|
||
*** The buttons in the Gnus article buffer were formerly widgets
|
||
(i.e., buttons from widget.el). This has now changed, and they are
|
||
now buttons (from button.el), and commands like 'TAB' now search for
|
||
buttons instead of widgets. There should be no user-visible changes,
|
||
but out-of-tree code that relied on widgets being present might now
|
||
fail.
|
||
|
||
** erc
|
||
|
||
*** New hook 'erc-insert-done-hook'.
|
||
This hook is called after strings have been inserted into the buffer,
|
||
and is free to alter point and window configurations, as it's not
|
||
called from inside a 'save-excursion', as opposed to 'erc-insert-post-hook'.
|
||
|
||
*** 'erc-button-google-url' has been renamed to 'erc-button-search-url'
|
||
and its value has been changed to Duck Duck Go.
|
||
|
||
*** 'erc-send-pre-hook' and 'erc-send-this' have been obsoleted.
|
||
The user option to use instead to alter text to be sent is now
|
||
'erc-pre-send-functions'.
|
||
|
||
*** Improve matching/highlighting of nicknames.
|
||
Open and close parenthesis and apostrophe are not considered valid
|
||
nick characters anymore, matching the given grammar in RFC 2812
|
||
section 2.3.1. This enables correct matching and highlighting of
|
||
nicks when they are surrounded by parentheses, like "(nick)", and when
|
||
adjacent to an apostrophe, like "nick's".
|
||
|
||
*** Set 'erc-button-url-regexp' to 'browse-url-button-regexp'
|
||
which better handles surrounding pair of parentheses.
|
||
|
||
*** New function 'erc-switch-to-buffer-other-window'
|
||
which is like 'erc-switch-to-buffer', but opens the buffer in another
|
||
window.
|
||
|
||
*** New function 'erc-track-switch-buffer-other-window'
|
||
which is like 'erc-track-switch-buffer', but opens the buffer in
|
||
another window.
|
||
|
||
** EUDC
|
||
|
||
*** XEmacs support has been removed.
|
||
|
||
** eww/shr
|
||
|
||
*** The new user option 'shr-cookie-policy' can be used to control
|
||
when to use cookies when fetching embedded images. The default is to
|
||
use them when the images are from the same domain as the main HTML
|
||
document.
|
||
|
||
*** The 'eww' command can now create a new EWW buffer.
|
||
Invoking the command with a prefix argument will cause it to create a
|
||
new EWW buffer for the URL instead of reusing the default one.
|
||
|
||
*** Clicking with the Ctrl key or 'C-u RET' on a link opens a new tab
|
||
when tab-bar-mode is enabled.
|
||
|
||
*** The 'd' ('eww-download') command now falls back to current page's URL.
|
||
If this command is invoked with no URL at point, it now downloads the
|
||
current page instead of signaling an error.
|
||
|
||
*** When opening external links in eww/shr (typically with the
|
||
'C-u RET' keystroke on a link), the link will be flashed with the new
|
||
'shr-selected-link' face to give the user feedback that the command
|
||
has been executed.
|
||
|
||
*** New user option 'shr-discard-aria-hidden'.
|
||
If set, shr will not render tags with attribute 'aria-hidden="true"'.
|
||
This attribute is meant to tell screen readers to ignore a tag.
|
||
|
||
*** 'shr-external-browser' has been made into an obsolete alias
|
||
of 'browse-url-secondary-browser-function'.
|
||
|
||
*** 'shr-tag-ol' now respects the ordered list 'start' attribute.
|
||
|
||
*** The following tags are now handled: '<code>', '<abbr>', and '<acronym>'.
|
||
|
||
** Htmlfontify
|
||
|
||
*** The functions 'hfy-color', 'hfy-color-vals' and
|
||
'hfy-fallback-color-values' and the variables 'hfy-fallback-color-map'
|
||
and 'hfy-rgb-txt-color-map' have been renamed from names that used
|
||
'colour' instead of 'color'.
|
||
|
||
** Enriched mode supports the 'charset' text property.
|
||
You can add or modify the 'charset' text properties of text using the
|
||
'Edit->Text Properties->Special Properties' menu, or by invoking the
|
||
'facemenu-set-charset' command. Documents in Enriched mode will be
|
||
saved with the charset properties, and those properties will be
|
||
restored when the file is visited.
|
||
|
||
** Smtpmail
|
||
|
||
*** Authentication mechanisms can be added via external packages, by
|
||
defining new 'cl-defmethod' of 'smtpmail-try-auth-method'.
|
||
|
||
*** To always force smtpmail to send credentials over on the first
|
||
attempt when communicating with the SMTP server(s), the
|
||
'smtpmail-servers-requiring-authorization' user option can be used.
|
||
|
||
*** smtpmail will now try resending mail when getting a transient "4xx"
|
||
error message from the SMTP server. The new 'smtpmail-retries'
|
||
user option says how many times to retry.
|
||
|
||
** Footnote mode
|
||
|
||
*** Support Hebrew-style footnotes.
|
||
|
||
*** Footnote text lines are now aligned.
|
||
Can be controlled via the new user option 'footnote-align-to-fn-text'.
|
||
|
||
** CSS mode
|
||
|
||
*** A new command 'css-cycle-color-format' for cycling between color
|
||
formats (e.g. "black" => "#000000" => "rgb(0, 0, 0)") has been added,
|
||
bound to 'C-c C-f'.
|
||
|
||
*** CSS mode, SCSS mode, and Less CSS mode now have support for Imenu.
|
||
|
||
** SGML mode
|
||
|
||
*** 'sgml-quote' now handles double quotes and apostrophes
|
||
when escaping text and in addition all numeric entities when
|
||
unescaping text.
|
||
|
||
** Python mode
|
||
|
||
*** Python mode supports three different font lock decoration levels.
|
||
The maximum level is used by default; customize
|
||
'font-lock-maximum-decoration' to tone down the decoration.
|
||
|
||
*** New user option 'python-pdbtrack-kill-buffers'.
|
||
If non-nil, the default, buffers opened during pdbtracking session are
|
||
killed when pdbtracking session is finished.
|
||
|
||
*** New function 'python-shell-send-statement.
|
||
It sends the statement delimited by 'python-nav-beginning-of-statement'
|
||
and 'python-nav-end-of-statement' to the inferior Python process.
|
||
|
||
** Help
|
||
|
||
*** Descriptions of variables and functions give an estimated first release
|
||
where the variable or function appeared in Emacs.
|
||
|
||
*** Output format of 'C-h l' ('view-lossage') has changed.
|
||
For convenience, 'view-lossage' now displays the last keystrokes
|
||
and commands in the same format as the edit buffer of
|
||
'edit-last-kbd-macro'. This makes it possible to copy the lines from
|
||
the buffer generated by 'view-lossage' to the "*Edit Macro*" buffer
|
||
created by 'edit-last-kbd-macro', and to save the macro by 'C-c C-c'.
|
||
|
||
*** The list of help commands produced by 'C-h C-h' ('help-for-help')
|
||
can now be searched via 'C-s'.
|
||
|
||
** Ibuffer
|
||
|
||
*** New filter 'ibuffer-filter-by-process'; bound to '/ E'.
|
||
|
||
*** All mode filters can now accept a list of symbols.
|
||
This means you can now easily filter several major modes, as well
|
||
as a single mode.
|
||
|
||
** Search and Replace
|
||
|
||
*** Isearch supports a prefix argument for 'C-s' ('isearch-repeat-forward')
|
||
and 'C-r' ('isearch-repeat-backward'). With a prefix argument, these
|
||
commands repeat the search for the specified occurrence of the search string.
|
||
A negative argument repeats the search in the opposite direction.
|
||
This makes possible also to use a prefix argument for 'M-s .'
|
||
('isearch-forward-symbol-at-point') to find the next Nth symbol.
|
||
Also a prefix argument is supported for 'isearch-yank-until-char',
|
||
'isearch-yank-word-or-char', 'isearch-yank-symbol-or-char'.
|
||
|
||
*** To go to the first/last occurrence of the current search string
|
||
is possible now with new commands 'isearch-beginning-of-buffer' and
|
||
'isearch-end-of-buffer' bound to 'M-s M-<' and 'M-s M->' in Isearch.
|
||
With a numeric argument, they go to the Nth absolute occurrence
|
||
counting from the beginning/end of the buffer. This complements
|
||
'C-s'/'C-r' that searches for the next Nth relative occurrence
|
||
with a numeric argument.
|
||
|
||
*** 'isearch-lazy-count' shows the current match number and total number
|
||
of matches in the Isearch prompt. User options
|
||
'lazy-count-prefix-format' and 'lazy-count-suffix-format' define the
|
||
format of the current and the total number of matches in the prompt's
|
||
prefix and suffix, respectively.
|
||
|
||
*** 'lazy-highlight-buffer' highlights matches in the full buffer.
|
||
It is useful in combination with 'lazy-highlight-cleanup' customized to nil
|
||
to leave matches highlighted in the whole buffer after exiting isearch.
|
||
Also when 'lazy-highlight-buffer' prepares highlighting in the buffer,
|
||
navigation through the matches without flickering is more smooth.
|
||
'lazy-highlight-buffer-max-at-a-time' controls the number of matches to
|
||
highlight in one iteration while processing the full buffer.
|
||
|
||
*** New isearch bindings.
|
||
'C-M-z' invokes new function 'isearch-yank-until-char', which yanks
|
||
everything from point up to but not including the specified
|
||
character into the search string. This is especially useful for
|
||
keyboard macros.
|
||
|
||
'C-M-w' in isearch changed from 'isearch-del-char' to the new function
|
||
'isearch-yank-symbol-or-char'. 'isearch-del-char' is now bound to
|
||
'C-M-d'.
|
||
|
||
'M-s h l' invokes 'highlight-lines-matching-regexp' using the search
|
||
string to highlight lines matching the search string. This is similar
|
||
to the existing binding 'M-s h r' ('highlight-regexp') that highlights
|
||
JUST the search string.
|
||
|
||
*** New user option 'isearch-yank-on-move' provides options t and 'shift'
|
||
to extend the search string by yanking text that ends at the new
|
||
position after moving point in the current buffer. 'shift' extends
|
||
the search string by motion commands while holding down the shift key.
|
||
|
||
*** 'isearch-allow-scroll' provides a new option 'unlimited' to allow
|
||
scrolling any distance off screen.
|
||
|
||
*** Isearch now remembers the regexp-based search mode for words/symbols
|
||
and case-sensitivity together with search strings in the search ring.
|
||
|
||
*** Isearch now has its own tool-bar and menu-bar menu.
|
||
|
||
*** 'flush-lines' prints and returns the number of deleted matching lines.
|
||
|
||
*** 'char-fold-to-regexp' now matches more variants of a base character.
|
||
The table used to check for equivalence of characters is now built
|
||
using the complete chain of unicode decompositions of a character,
|
||
rather than stopping after one level, such that searching for
|
||
e.g. "GREEK SMALL LETTER IOTA" will now also find "GREEK SMALL LETTER
|
||
IOTA WITH OXIA".
|
||
|
||
*** New char-folding options: 'char-fold-include' lets you add ad hoc
|
||
foldings, 'char-fold-exclude' to remove foldings from default decomposition,
|
||
and 'char-fold-symmetric' to search for any of an equivalence class of
|
||
characters. For example, with a nil value of 'char-fold-symmetric'
|
||
you can search for "e" to find "é", but not vice versa. With a non-nil
|
||
value you can search for either, for example, you can search for "é"
|
||
to find "e".
|
||
|
||
** Debugger
|
||
|
||
*** The Lisp Debugger is now based on 'backtrace-mode'.
|
||
Backtrace mode adds fontification and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
** Edebug
|
||
|
||
*** 'edebug-eval-last-sexp' and 'edebug-eval-print-last-sexp' interactively
|
||
now take a zero prefix analogously to the non-Edebug counterparts.
|
||
|
||
*** New faces 'edebug-enabled-breakpoint' and 'edebug-disabled-breakpoint'.
|
||
When setting breakpoints in Edebug, an overlay with these faces are
|
||
placed over the point in question, depending on whether they are
|
||
enabled or not.
|
||
|
||
*** New command 'edebug-toggle-disable-breakpoint'.
|
||
This command allows you to disable a breakpoint temporarily. This is
|
||
mainly useful with breakpoints that are conditional and would take
|
||
some time to recreate.
|
||
|
||
*** New command 'edebug-unset-breakpoints'.
|
||
To clear all breakpoints in the current form, the 'U' command in
|
||
'edebug-mode', or 'M-x edebug-unset-breakpoints' can be used.
|
||
|
||
*** Re-instrumenting a function with Edebug will now try to preserve
|
||
previously-set breakpoints. However, if the code has changed
|
||
substantially, this may not be possible.
|
||
|
||
*** New command 'edebug-remove-instrumentation'.
|
||
This command removes Edebug instrumentation from all functions that
|
||
have been instrumented.
|
||
|
||
*** The runtime behavior of Edebug's instrumentation can be changed
|
||
using the new variables 'edebug-behavior-alist',
|
||
'edebug-after-instrumentation-function' and
|
||
'edebug-new-definition-function'. Edebug's behavior can be changed
|
||
globally or for individual definitions.
|
||
|
||
*** Edebug's backtrace buffer now uses 'backtrace-mode'.
|
||
Backtrace mode adds fontification, links and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
The binding of 'd' in Edebug's keymap is now 'edebug-pop-to-backtrace'
|
||
which replaces 'edebug-backtrace'. Consequently Edebug's backtrace
|
||
windows now behave like those of the Lisp Debugger and of ERT, in that
|
||
when they appear they will be the selected window.
|
||
|
||
The new 'backtrace-goto-source' command, bound to 's', works in
|
||
Edebug's backtraces on backtrace frames whose source code has
|
||
been instrumented by Edebug.
|
||
|
||
** Enhanced xterm support
|
||
|
||
*** New user option 'xterm-set-window-title' controls whether Emacs sets
|
||
the XTerm window title. This feature is experimental and is disabled
|
||
by default.
|
||
|
||
** Grep
|
||
|
||
*** 'rgrep', 'lgrep' and 'zrgrep' now hide part of the command line
|
||
that contains a list of ignored directories and files.
|
||
Clicking on the button with ellipsis unhides it.
|
||
The abbreviation can be disabled by the new user option
|
||
'grep-find-abbreviate'. The new command
|
||
'grep-find-toggle-abbreviation' toggles it interactively.
|
||
|
||
*** 'grep-find-use-xargs' is now customizable with sorting options.
|
||
|
||
** ERT
|
||
|
||
*** New variable 'ert-quiet' allows making ERT output in batch mode
|
||
less verbose by removing non-essential information.
|
||
|
||
*** ERT's backtrace buffer now uses 'backtrace-mode'.
|
||
Backtrace mode adds fontification and commands for changing the
|
||
appearance of backtrace frames. See the node "(elisp) Backtraces" in
|
||
the Elisp manual for documentation of the new mode and its commands.
|
||
|
||
** Gamegrid
|
||
|
||
*** Gamegrid now determines its default glyph size based on display
|
||
dimensions, instead of always using 16 pixels. As a result, Tetris,
|
||
Snake and Pong are better playable on HiDPI displays.
|
||
|
||
*** 'gamegrid-add-score' can now sort scores from lower to higher.
|
||
This is useful for games where lower scores are better, like time-based games.
|
||
|
||
** Filecache
|
||
|
||
*** Completing file names in the minibuffer via 'C-TAB' now uses the
|
||
styles as configured by the user option 'completion-styles'.
|
||
|
||
** New macros 'thunk-let' and 'thunk-let*'.
|
||
These macros are analogue to 'let' and 'let*', but create bindings that
|
||
are evaluated lazily.
|
||
|
||
** next-error
|
||
|
||
*** New user option 'next-error-find-buffer-function'.
|
||
The value should be a function that determines how to find the
|
||
next buffer to be used by 'next-error' and 'previous-error'. The
|
||
default is to use the last buffer that navigated to the current
|
||
error.
|
||
|
||
*** New command 'next-error-select-buffer'.
|
||
It can be used to set any buffer as the next one to be used by
|
||
'next-error' and 'previous-error'.
|
||
|
||
** 'nxml-mode'
|
||
|
||
*** The default value of 'nxml-sexp-element-flag' is now t.
|
||
This means that pressing 'C-M-SPACE' now selects the entire tree by
|
||
default, and not just the opening element.
|
||
|
||
** Eshell
|
||
|
||
*** TAB completion uses the standard 'completion-at-point' rather than
|
||
'pcomplete'. Its UI is slightly different but can be customized to
|
||
behave similarly, e.g. Pcomplete's default cycling can be obtained
|
||
with '(setq completion-cycle-threshold 5)'.
|
||
|
||
*** Expansion of history event designators is disabled by default.
|
||
To restore the old behavior, use
|
||
|
||
(add-hook 'eshell-expand-input-functions
|
||
#'eshell-expand-history-references)
|
||
|
||
*** The function 'eshell-uniquify-list' has been renamed from
|
||
'eshell-uniqify-list'.
|
||
|
||
*** The function 'eshell/kill' is now able to handle signal switches.
|
||
Previously 'eshell/kill' would fail if provided a kill signal to send
|
||
to the process. It now accepts signals specified either by name or by
|
||
its number.
|
||
|
||
*** Emacs now follows symlinks in history-related files.
|
||
The files specified by 'eshell-history-file-name' and
|
||
'eshell-last-dir-ring-file-name' can include symlinks; these are now
|
||
followed when Emacs writes the relevant history variables to the disk.
|
||
|
||
** Shell
|
||
|
||
*** Program name completion inside remote shells works now as expected.
|
||
|
||
*** The user option 'shell-file-name' can be set now as connection-local
|
||
variable for remote shells. It still defaults to "/bin/sh".
|
||
|
||
** Single shell commands
|
||
|
||
*** New values of 'shell-command-dont-erase-buffer'.
|
||
This user option can now have the value 'erase' to force to erase the
|
||
output buffer before execution of the command, even if the output goes
|
||
to the current buffer. Additional values 'beg-last-out',
|
||
'end-last-out', and 'save-point' control where to put point in the
|
||
output buffer after inserting the 'shell-command' output.
|
||
|
||
*** The new functions 'shell-command-save-pos-or-erase' and
|
||
'shell-command-set-point-after-cmd' control how point is handled
|
||
between two consecutive shell commands in the same output buffer.
|
||
|
||
*** 'async-shell-command-width' defines the number of display columns
|
||
available for output of asynchronous shell commands.
|
||
|
||
*** Prompt for shell commands can now show the current directory.
|
||
Customize the new user option 'shell-command-prompt-show-cwd' to enable it.
|
||
|
||
** Pcomplete
|
||
|
||
*** The 'pcomplete' command is now obsolete.
|
||
The Pcomplete functionality can be obtained via 'completion-at-point'
|
||
instead, by adding 'pcomplete-completions-at-point' to
|
||
'completion-at-point-functions'.
|
||
|
||
*** The function 'pcomplete-uniquify-list' has been renamed from
|
||
'pcomplete-uniqify-list'.
|
||
|
||
*** 'pcomplete/make' now completes on targets in included files, recursively.
|
||
To recover the previous behavior, set new user option
|
||
'pcmpl-gnu-makefile-includes' to nil.
|
||
|
||
** Auth-source
|
||
|
||
*** The Secret Service backend supports the ':create' key now.
|
||
|
||
*** ".authinfo" and ".netrc" files now use a new mode: 'authinfo-mode'.
|
||
This is just like 'fundamental-mode', except that it hides passwords
|
||
under a "****" display property. When the cursor moves to this text,
|
||
the real password is revealed (via 'reveal-mode'). The new
|
||
'authinfo-hidden' user option can be used to control what to hide.
|
||
|
||
** Tramp
|
||
|
||
*** New connection method "nextcloud", which allows accessing OwnCloud
|
||
or NextCloud hosted files and directories.
|
||
|
||
*** New connection method "rclone", which allows accessing system
|
||
storages via the 'rclone' program. This feature is experimental.
|
||
|
||
*** New connection method "sudoedit", which allows editing local files
|
||
with different user credentials. Contrary to the "sudo" method, no
|
||
session is run permanently in the background. This is for security
|
||
reasons.
|
||
|
||
*** Connection methods "obex" and "synce" have been removed, because they
|
||
are obsoleted in GVFS.
|
||
|
||
*** Validated passwords are saved by auth-source backends which support this.
|
||
|
||
*** During user and host name completion in the minibuffer, results
|
||
from auth-source search are taken into account. This can be disabled
|
||
by setting the user option 'tramp-completion-use-auth-sources' to nil.
|
||
|
||
*** The user option 'tramp-ignored-file-name-regexp' allows disabling
|
||
Tramp for some look-alike remote file names.
|
||
|
||
*** For some connection methods, like "su" or "sudo", the host name in
|
||
multi-hop file names must match the previous hop. Default host names
|
||
are adjusted to the host name from the previous hop.
|
||
|
||
*** A timeout has been added for the connection methods "sudo" and "doas".
|
||
The underlying session is disabled when the timeout expires. This is
|
||
for security reasons.
|
||
|
||
*** For some connection methods, like "sshx" or "plink", it is
|
||
possible to configure the remote login shell. This avoids problems
|
||
with remote hosts, where "/bin/sh" is a link to a shell which
|
||
cooperates badly with Tramp.
|
||
|
||
*** New commands 'tramp-rename-files' and 'tramp-rename-these-files'.
|
||
They allow saving remote files somewhere else when the corresponding
|
||
host is not reachable anymore.
|
||
|
||
** Rcirc
|
||
|
||
*** New user option 'rcirc-url-max-length'.
|
||
Setting this option to an integer causes URLs displayed in Rcirc
|
||
buffers to be truncated to that many characters.
|
||
|
||
*** The default '/quit' and '/part' reasons are now configurable.
|
||
Two new user options are provided for this:
|
||
'rcirc-default-part-reason' and 'rcirc-default-quit-reason'.
|
||
|
||
** Register
|
||
|
||
*** The return value of method 'register-val-describe' includes the
|
||
names of buffers shown by the windows of a window configuration.
|
||
|
||
** Message
|
||
|
||
*** Completion of email addresses can use the standard completion UI.
|
||
This is controlled by 'message-expand-name-standard-ui'.
|
||
With the standard UI the different sources (ecomplete, bbdb, and eudc)
|
||
are matched together and try to obey 'completion-styles'.
|
||
It should work for other completion front ends like Company.
|
||
|
||
*** 'message-mode' now supports highlighting citations of different depths.
|
||
This can be customized via the new user option
|
||
'message-cite-level-function' and the new 'message-cited-text-*' faces.
|
||
|
||
*** Messages can now be systematically encrypted
|
||
when the PGP keyring contains a public key for every recipient. To
|
||
achieve this, add 'message-sign-encrypt-if-all-keys-available' to
|
||
'message-send-hook'.
|
||
|
||
*** When replying a message that have addresses on the form
|
||
'"foo@bar.com" <foo@bar.com>', Message will elide the repeated "name"
|
||
from the address field in the response.
|
||
|
||
*** The default of 'message-forward-as-mime' has changed from t to nil
|
||
as it has been reported that many recipients can't read forwards that
|
||
are formatted as MIME digests.
|
||
|
||
*** 'message-forward-included-headers' has changed its default to
|
||
exclude most headers when forwarding.
|
||
|
||
*** 'mml-secure-openpgp-sign-with-sender' sets also "gpg --sender".
|
||
When 'mml-secure-openpgp-sign-with-sender' is non-nil, message sender's
|
||
email address (in addition to its old behavior) will also be used to
|
||
set gpg's "--sender email@domain" option.
|
||
|
||
The option is useful for two reasons when verifying the signature:
|
||
|
||
1. GnuPG's TOFU statistics are updated for the specific user id
|
||
(email) only. See gpg(1) man page about "--sender".
|
||
|
||
2. GnuPG's "--auto-key-retrieve" functionality can use WKD (web key
|
||
directory) method for finding the signer's key. You need GnuPG
|
||
2.2.17 to fully benefit from this feature. See gpg(1) man page for
|
||
"--auto-key-retrieve".
|
||
|
||
*** The 'mail-from-style' variable is now obsolete.
|
||
According to RFC 5322, only the 'angles' value is valid.
|
||
|
||
** EasyPG
|
||
|
||
*** 'epa-pinentry-mode' is renamed to 'epg-pinentry-mode'.
|
||
It now applies to epg functions as well as epa functions.
|
||
|
||
*** The alias functions 'epa--encode-coding-string',
|
||
'epa--decode-coding-string', and 'epa--select-safe-coding-system' have
|
||
been removed. Use 'encode-coding-string', 'decode-coding-string', and
|
||
'select-safe-coding-system' instead.
|
||
|
||
*** 'epg-context' structure supports now 'sender' slot.
|
||
The value of the new 'sender' slot (if a string) is used to set gpg's
|
||
"--sender" option. This feature is used by
|
||
'mml-secure-openpgp-sign-with-sender'. See gpg(1) manual page about
|
||
"--sender" for more information.
|
||
|
||
*** 'epg-find-configuration' no longer finds GnuPG 2.0 through 2.1.5.
|
||
Previously, it found these versions by mistake. The intent was to
|
||
find GnuPG 2.1.6 or later, or find GnuPG 1.4.3 or later within the
|
||
GnuPG 1 series.
|
||
|
||
** Rmail
|
||
|
||
*** New user option 'rmail-output-reset-deleted-flag'.
|
||
If this option is non-nil, messages appended to an output file by the
|
||
'rmail-output' command have their Deleted flag reset.
|
||
|
||
*** The command 'rmail-summary-by-senders' with an empty argument
|
||
selects the messages to summarize with a regexp that matches the
|
||
sender of the current message.
|
||
|
||
** Threads
|
||
|
||
*** New variable 'main-thread' holds Emacs's main thread.
|
||
This is handy in Lisp programs that run on a non-main thread and want
|
||
to signal the main thread, e.g., when they encounter an error.
|
||
|
||
*** 'thread-join' now returns the result of the finished thread.
|
||
|
||
*** 'thread-signal' does not propagate errors to the main thread.
|
||
Instead, error messages are just printed in the main thread.
|
||
|
||
*** 'thread-alive-p' is now obsolete, use 'thread-live-p' instead.
|
||
|
||
*** New command 'list-threads' shows Lisp threads.
|
||
See the current list of live threads in a tabulated-list buffer which
|
||
automatically updates. In the buffer, you can use 's q' or 's e' to
|
||
signal a thread with quit or error respectively, or get a snapshot
|
||
backtrace with 'b'.
|
||
|
||
** thingatpt.el
|
||
|
||
*** 'thing-at-point' supports a new "thing" called 'uuid'.
|
||
A symbol 'uuid' can be passed to 'thing-at-point' and it returns the
|
||
UUID at point.
|
||
|
||
*** 'number-at-point' will now recognize hex numbers like 0xAb09 and #xAb09
|
||
and return them as numbers.
|
||
|
||
*** 'word-at-point' and 'sentence-at-point' accept NO-PROPERTIES.
|
||
Just like 'thing-at-point' itself.
|
||
|
||
** Interactive automatic highlighting
|
||
|
||
*** 'highlight-regexp' can now highlight subexpressions.
|
||
The new command accepts a prefix numeric argument to choose the
|
||
subexpression.
|
||
|
||
** Mouse display of minor mode menu
|
||
|
||
*** 'minor-mode-menu-from-indicator' now displays full minor mode name.
|
||
When there is no menu for a mode, display the mode name after the
|
||
indicator instead of just the indicator (which is sometimes cryptic).
|
||
|
||
** rx
|
||
|
||
*** rx now handles raw bytes in character alternatives correctly,
|
||
when given in a string. Previously, '(any "\x80-\xff")' would match
|
||
characters U+0080...U+00FF. Now the expression matches raw bytes in
|
||
the 128...255 range, as expected.
|
||
|
||
*** The rx 'or' and 'seq' forms no longer require any arguments.
|
||
'(or)' produces a regexp that never matches anything, while '(seq)'
|
||
matches the empty string, each being an identity for the operation.
|
||
This also works for their aliases: '|' for 'or'; ':', 'and' and
|
||
'sequence' for 'seq'.
|
||
The symbol 'unmatchable' can be used as an alternative to '(or)'.
|
||
|
||
*** 'regexp' and new 'literal' accept arbitrary lisp as arguments.
|
||
In this case, 'rx' will generate code which produces a regexp string
|
||
at run time, instead of a constant string.
|
||
|
||
*** New rx extension mechanism: 'rx-define', 'rx-let', 'rx-let-eval'.
|
||
These macros add new forms to the rx notation.
|
||
|
||
*** 'anychar' is now an alias for 'anything'.
|
||
Both match any single character; 'anychar' is more descriptive.
|
||
|
||
*** New 'intersection' form for character sets.
|
||
With 'or' and 'not', it can be used to compose character-matching
|
||
expressions from simpler parts.
|
||
|
||
*** 'not' now accepts more argument types.
|
||
The argument can now also be a character, a single-character string,
|
||
an 'intersection' form, or an 'or' form whose arguments each match a
|
||
single character.
|
||
|
||
*** Nested 'or' forms of strings guarantee a longest match.
|
||
For example, '(or (or "IN" "OUT") (or "INPUT" "OUTPUT"))' now matches
|
||
the whole string "INPUT" if present, not just "IN". Previously, this
|
||
was only guaranteed inside a single 'or' form of string literals.
|
||
|
||
** Frames
|
||
|
||
*** New command 'make-frame-on-monitor' makes a frame on the specified monitor.
|
||
|
||
*** New value of 'minibuffer' frame parameter 'child-frame'.
|
||
This allows creating and immediately parenting a minibuffer-only child
|
||
frame when making a frame.
|
||
|
||
*** New predicates 'display-blink-cursor-p' and 'display-symbol-keys-p'.
|
||
These predicates are to be preferred over 'display-graphic-p' when
|
||
testing for blinking cursor capability and the capability to have
|
||
symbols (e.g., '[return]', '[tab]', '[backspace]') as keys respectively.
|
||
|
||
** Tabulated List mode
|
||
|
||
*** New user options for tabulated list sort indicators.
|
||
You can now customize which sorting indicator character to display
|
||
near the current column in Tabulated Lists (see user options
|
||
'tabulated-list-gui-sort-indicator-asc',
|
||
'tabulated-list-gui-sort-indicator-desc',
|
||
'tabulated-list-tty-sort-indicator-asc', and
|
||
'tabulated-list-tty-sort-indicator-desc').
|
||
|
||
*** Two new commands and keystrokes have been added to the tabulated
|
||
list mode: 'w' (which widens the current column) and 'c' which makes
|
||
the current column contract.
|
||
|
||
*** New function 'tabulated-list-clear-all-tags'.
|
||
This function clears all tags from the padding area in the current
|
||
buffer. Tags are typically added by calling 'tabulated-list-put-tag'.
|
||
|
||
** Text mode
|
||
|
||
*** 'text-mode-variant' is now obsolete, use 'derived-mode-p' instead.
|
||
|
||
** CUA mode
|
||
|
||
*** New user option 'cua-rectangle-terminal-modifier-key'.
|
||
This user option allows for the customization of the modifier key used
|
||
in a terminal frame.
|
||
|
||
** JS mode
|
||
|
||
*** JSX syntax is now automatically detected and enabled.
|
||
If a file imports Facebook's 'React' library, or if the file uses the
|
||
extension ".jsx", then various features supporting XML-like syntax
|
||
will be supported in 'js-mode' and derivative modes. ('js-jsx-mode'
|
||
no longer needs to be enabled.)
|
||
|
||
*** New user option 'js-jsx-detect-syntax' disables automatic detection.
|
||
This is turned on by default.
|
||
|
||
*** New user option 'js-jsx-syntax' enables JSX syntax unconditionally.
|
||
This is off by default.
|
||
|
||
*** New variable 'js-jsx-regexps' controls JSX detection.
|
||
|
||
*** JSX syntax is now highlighted like SGML.
|
||
|
||
*** JSX code is properly indented in many more scenarios.
|
||
Previously, JSX indentation usually only worked when an element was
|
||
wrapped in parenthesis (e.g. in a 'return' statement or a function
|
||
call). It would also fail in many intricate cases. Now, indentation
|
||
should work anywhere without parenthesis; many more intricacies are
|
||
supported; and, indentation conventions align more closely with those
|
||
of the React developer community (see 'js-jsx-align->-with-<'),
|
||
otherwise still adhering to SGML conventions.
|
||
|
||
*** New user option 'js-jsx-align->-with-<' controls '>' indents.
|
||
Commonly in JSX code, a '>' on its own line is indented at the same
|
||
level as its opening '<'. This is the new default for JSX. This
|
||
behavior is slightly different than that used by SGML in Emacs, where
|
||
'>' is indented at the same level as attributes, which was also the
|
||
old default for JSX.
|
||
|
||
This is turned on by default. To get back the old default indentation
|
||
behavior of aligning '>' with attributes, set 'js-jsx-align->-with-<'
|
||
to nil.
|
||
|
||
*** Indentation uses 'js-indent-level' instead of 'sgml-basic-offset'.
|
||
Since JSX is a syntax extension of JavaScript, it makes the most sense
|
||
for JSX expressions to be indented the same number of spaces as other
|
||
JS expressions. This is a breaking change, but it probably aligns
|
||
with how you'd expect this indentation to behave. If you want JSX to
|
||
be indented like JS, you won't need to change your config.
|
||
|
||
The old behavior can be emulated by controlling JSX indentation
|
||
independently of JS, by setting 'js-jsx-indent-level'.
|
||
|
||
*** New user option 'js-jsx-indent-level' for different JSX indentation.
|
||
If you wish to indent JSX by a different number of spaces than JS, set
|
||
this user option to the desired number.
|
||
|
||
*** New user option 'js-jsx-attribute-offset' for JSX attribute indents.
|
||
|
||
*** New variable 'js-syntactic-mode-name' controls mode name display.
|
||
Previously, the mode name was simply 'JavaScript'. Now, when a syntax
|
||
extension like JSX is enabled, the mode name is 'JavaScript[JSX]'.
|
||
Set this variable to nil to disable the new behavior.
|
||
|
||
*** New function 'js-use-syntactic-mode-name' for deriving modes.
|
||
Packages deriving from 'js-mode' with 'define-derived-mode' should
|
||
call this function to add enabled syntax extensions to their mode
|
||
name, too.
|
||
|
||
** Autorevert
|
||
|
||
*** New user option 'auto-revert-avoid-polling' for saving power.
|
||
When set to a non-nil value, buffers in Auto Revert mode are no longer
|
||
polled for changes periodically. This reduces the power consumption
|
||
of an idle Emacs, but may fail on some network file systems; set
|
||
'auto-revert-notify-exclude-dir-regexp' to match files where
|
||
notification is not supported. The default value is nil.
|
||
|
||
*** New variable 'buffer-auto-revert-by-notification'.
|
||
A major mode can declare that notification on the buffer's default
|
||
directory is sufficient to know when updates are required, by setting
|
||
the new variable 'buffer-auto-revert-by-notification' to a non-nil
|
||
value. Auto Revert mode can use this information to avoid polling the
|
||
buffer periodically when 'auto-revert-avoid-polling' is non-nil.
|
||
|
||
*** 'global-auto-revert-ignore-buffer' can now also be a predicate
|
||
function that can be used for more fine-grained control of which
|
||
buffers to auto-revert.
|
||
|
||
** auth-source-pass
|
||
|
||
*** New user option 'auth-source-pass-filename'.
|
||
Allows setting the path to the password-store, defaults to
|
||
"~/.password-store".
|
||
|
||
*** New user option 'auth-source-pass-port-separator'.
|
||
Specifies separator between host and port, defaults to colon ":".
|
||
|
||
*** Minimize the number of decryptions during password lookup.
|
||
This makes the package usable with physical tokens requiring touching
|
||
a sensor for every decryption.
|
||
|
||
*** 'auth-source-pass-get' is now autoloaded.
|
||
|
||
** Bookmarks
|
||
|
||
*** 'bookmark-file' and 'bookmark-old-default-file' are now obsolete
|
||
aliases of 'bookmark-default-file'.
|
||
|
||
*** New user option 'bookmark-watch-bookmark-file'.
|
||
When non-nil, watch whether the bookmark file has changed on disk.
|
||
|
||
*** The old bookmark file format is no longer supported.
|
||
This bookmark file format has not been used in Emacs since at least
|
||
version 19.34, released in 1996, and will no longer be automatically
|
||
converted to the new bookmark file format.
|
||
|
||
The following functions are now declared obsolete:
|
||
'bookmark-grok-file-format-version',
|
||
'bookmark-maybe-upgrade-file-format',
|
||
'bookmark-upgrade-file-format-from-0', and
|
||
'bookmark-upgrade-version-0-alist'.
|
||
|
||
** The mantemp.el library is now marked obsolete.
|
||
This library generates manual C++ template instantiations. It should
|
||
no longer be useful on modern compilers, which do this automatically.
|
||
|
||
** Ispell
|
||
|
||
*** New hook 'ispell-change-dictionary-hook'.
|
||
This runs after changing the dictionary and could be used to
|
||
automatically spellcheck a buffer when changing language without
|
||
needing to advice 'ispell-change-dictionary'.
|
||
|
||
** scroll-lock
|
||
|
||
*** New command 'scroll-lock-next-line-always-scroll'.
|
||
This command is bound to 'S-down' and scrolls the buffer up in
|
||
particular when the end of the buffer is visible in the window.
|
||
|
||
** mwheel.el
|
||
|
||
*** 'mwheel-install' is now obsolete.
|
||
Use 'mouse-wheel-mode' instead. Note that 'mouse-wheel-mode' is
|
||
already enabled by default on most graphical displays.
|
||
|
||
** Gravatar
|
||
|
||
*** 'gravatar-cache-ttl' is now a number of seconds.
|
||
The previously used timestamp format of a list of integers is still
|
||
supported, but is deprecated. The default value has not changed.
|
||
|
||
*** 'gravatar-size' can now be nil.
|
||
This results in the use of Gravatar's default size of 80 pixels.
|
||
|
||
*** The default fallback gravatar is now configurable.
|
||
This is possible using the new user options 'gravatar-default-image'
|
||
and 'gravatar-force-default'.
|
||
|
||
** ada-mode
|
||
|
||
*** The built-in ada-mode is now deleted. The GNU ELPA package is a
|
||
good replacement, even in very large source files.
|
||
|
||
** time-stamp
|
||
|
||
*** New '%5z' conversion for 'time-stamp-format' gives time zone offset.
|
||
Specifying '%5z' in 'time-stamp-format' or 'time-stamp-pattern'
|
||
expands to the time zone offset, e.g., '+0100'. The time zone used is
|
||
specified by 'time-stamp-time-zone'.
|
||
|
||
Because this feature is new in Emacs 27.1, do not use it in the local
|
||
variables section of any file that might be edited by an older version
|
||
of Emacs.
|
||
|
||
*** Some conversions recommended for 'time-stamp-format' have changed.
|
||
The new documented/recommended %-conversions are closer to those
|
||
used by 'format-time-string' and are compatible at least as far back
|
||
as Emacs 22.1 (released in 2007).
|
||
|
||
Uppercase abbreviated day name of week: was %3A, now %#a
|
||
Full day name of week: was %:a, now %:A
|
||
Uppercase abbreviated month name: was %3B, now %#b
|
||
Full month name: was %:b, now %:B
|
||
Four-digit year: was %:y, now %Y
|
||
Lowercase timezone name: was %z, now %#Z
|
||
Fully-qualified host name: was %s, now %Q
|
||
Unqualified host name: (was none), now %q
|
||
Login name: was %u, now %l
|
||
User's full name: was %U, now %L
|
||
|
||
Merely having '(add-hook 'before-save-hook #'time-stamp)' in your
|
||
Emacs init file does not expose you to this change. However,
|
||
if you set 'time-stamp-format' or 'time-stamp-pattern' with a
|
||
file-local variable, you may need to update the value.
|
||
|
||
** mode-local
|
||
|
||
*** Declare 'define-overload' and 'define-child-mode' as obsolete.
|
||
|
||
*** Rename several internal functions to use a 'mode-local-' prefix.
|
||
|
||
** CC Mode
|
||
|
||
*** You can now flag "wrong style" comments with 'font-lock-warning-face'.
|
||
To do this, use 'c-toggle-comment-style', if needed, to set the desired
|
||
default comment style (block or line); then set the user option
|
||
'c-mark-wrong-style-of-comment' to non-nil.
|
||
|
||
** Mailcap
|
||
|
||
*** The new function 'mailcap-file-name-to-mime-type' has been added.
|
||
It's a simple convenience function for looking up MIME types based on
|
||
file name extensions.
|
||
|
||
*** The default way the list of possible external viewers for MIME
|
||
types is sorted and chosen has changed. Earlier, the most specific
|
||
viewer was chosen, even if there was a general override in "~/.mailcap".
|
||
For instance, if "/etc/mailcap" has an entry for "image/gif", that one
|
||
will be chosen even if you have an entry for "image/*" in your
|
||
"~/.mailcap" file. But with the new method, entries from "~/.mailcap"
|
||
overrides all system and Emacs-provided defaults. To get the old
|
||
method back, set 'mailcap-prefer-mailcap-viewers' to nil.
|
||
|
||
** MH-E
|
||
|
||
*** The hook 'mh-show-mode-hook' is now called before the message is inserted.
|
||
Functions that want to affect the message text (for example, to change
|
||
highlighting) can no longer use 'mh-show-mode-hook', because the
|
||
message contents will not yet have been inserted when the hook is
|
||
called. Such functions should now be attached to 'mh-show-hook'.
|
||
|
||
** URL
|
||
|
||
*** The 'file:' handler no longer looks for "index.html" in
|
||
directories if you ask it for a "file:///dir" URL. Since this is a
|
||
low-level library, such decisions (if they are to be made at all) are
|
||
left to higher-level functions.
|
||
|
||
|
||
* New Modes and Packages in Emacs 27.1
|
||
|
||
** Tab Bars
|
||
|
||
*** Tab Bar mode
|
||
The new command 'tab-bar-mode' enables the tab bar at the top of each
|
||
frame (including TTY frames), where you can use tabs to switch between
|
||
named persistent window configurations.
|
||
|
||
The 'C-x t' sequence is the new prefix key for tab-related commands:
|
||
'C-x t 2' creates a new tab; 'C-x t 0' deletes the current tab;
|
||
'C-x t b' switches to buffer in another tab; 'C-x t f' and 'C-x t C-f'
|
||
edit file in another tab; and 'C-TAB' and 'S-C-TAB' switch to the next
|
||
or previous tab. You can also switch between tabs and create/delete
|
||
tabs with a mouse.
|
||
|
||
Tab-related commands are available even when 'tab-bar-mode' is
|
||
disabled: by default, they enable 'tab-bar-mode' in that case.
|
||
|
||
The X resource "tabBar", class "TabBar" enables the tab bar
|
||
when its value is "on", "yes" or "1".
|
||
|
||
The user option 'tab-bar-position' specifies where to show the tab bar.
|
||
|
||
Tab-related commands can be used even without the tab bar when
|
||
'tab-bar-mode' is disabled by a nil value of the user option
|
||
'tab-bar-show'. Without the tab bar you can switch between tabs
|
||
using completion on tab names, or using 'tab-switcher'.
|
||
|
||
Read the new Info node "(emacs) Tab Bars" for full description
|
||
of all related features.
|
||
|
||
*** Tab Line mode
|
||
The new command 'global-tab-line-mode' enables the tab line above each
|
||
window, which you can use to switch buffers in the window. Selecting
|
||
the previous window-local tab is the same as typing 'C-x <LEFT>'
|
||
('previous-buffer'), selecting the next tab is the same as 'C-x <RIGHT>'
|
||
('next-buffer'). Both commands support a numeric prefix argument as
|
||
a repeat count. Clicking on the plus icon adds a new buffer to the
|
||
window-local tab line of buffers. Using the mouse wheel on the tab
|
||
line scrolls tabs.
|
||
|
||
Read the new Info node "(emacs) Tab Line" for full description
|
||
of all related features.
|
||
|
||
** fileloop.el lets one setup multifile operations like search&replace.
|
||
|
||
** Emacs can now visit files in archives as if they were directories.
|
||
This feature uses Tramp and works only on systems which support GVFS,
|
||
i.e. GNU/Linux, roughly spoken. See the node "(tramp) Archive file
|
||
names" in the Tramp manual for full documentation of these facilities.
|
||
|
||
** New library for writing JSONRPC applications (https://jsonrpc.org).
|
||
The 'jsonrpc' library enables writing Emacs Lisp applications that
|
||
rely on this protocol. Since the protocol is designed to be
|
||
transport-agnostic, the library provides an API to implement new
|
||
transport strategies as well as a separate API to use them. A
|
||
transport implementation for process-based communication, such as is
|
||
used by the Language Server Protocol (LSP), is readily available.
|
||
|
||
** Backtrace mode improves viewing of Elisp backtraces.
|
||
Backtrace mode adds pretty printing, fontification and ellipsis
|
||
expansion to backtrace buffers produced by the Lisp debugger, Edebug
|
||
and ERT. See the node "(elisp) Backtraces" in the Elisp manual for
|
||
documentation of the new mode and its commands.
|
||
|
||
** 'so-long' helps to mitigate performance problems with long lines.
|
||
When 'global-so-long-mode' has been enabled, visiting a file with very
|
||
long lines will (subject to configuration) cause the user's preferred
|
||
'so-long-action' to be automatically invoked (by default, the buffer's
|
||
major mode is replaced by 'so-long-mode'). In extreme cases this can
|
||
prevent delays of several minutes, and make Emacs responsive almost
|
||
immediately. Type 'M-x so-long-commentary' for full documentation.
|
||
|
||
|
||
* Incompatible Lisp Changes in Emacs 27.1
|
||
|
||
** Incomplete destructive splicing support has been removed.
|
||
Support for Common Lisp style destructive splicing (",.") was
|
||
incomplete and broken for a long time. It has now been removed.
|
||
|
||
This means that backquote substitution now works for identifiers
|
||
starting with a period ("."). Consider the following example:
|
||
|
||
(let ((.foo 42)) `,.foo)
|
||
|
||
In the past, this would have incorrectly evaluated to '(\,\. foo)',
|
||
but will now instead evaluate to '42'.
|
||
|
||
** The REGEXP in 'magic-mode-alist' is now matched case-sensitively.
|
||
Likewise for 'magic-fallback-mode-alist'.
|
||
|
||
** 'add-hook' does not always add to the front or the end any more.
|
||
The replacement of 'append' with 'depth' implies that the function is
|
||
not always added to the very front (when append/depth is nil) or the
|
||
very end (when append/depth is t) any more because other functions on
|
||
the hook may have specified higher/lower depths. This makes it
|
||
possible to control the ordering of functions more precisely, as was
|
||
already possible in 'add-function' and 'advice-add'.
|
||
|
||
** In 'compilation-error-regexp-alist' the old undocumented feature
|
||
where 'line' could be a function of 2 arguments has been dropped.
|
||
|
||
** 'define-fringe-bitmap' is always defined, even when Emacs is built
|
||
without any GUI support.
|
||
|
||
** Just loading a theme's file no longer activates the theme's settings.
|
||
Loading a theme with 'M-x load-theme' still activates the theme, as it
|
||
did before. However, loading the theme's file with 'M-x load-file',
|
||
or using 'require' or 'load' in a Lisp program, doesn't actually apply
|
||
the theme's settings until you either invoke 'M-x enable-theme' or
|
||
type 'M-x load-theme'. (In a Lisp program, calling 'enable-theme' or
|
||
invoking 'load-theme' with NO-ENABLE argument omitted or nil has the
|
||
same effect of activating a theme whose file has been loaded.) The
|
||
special case of the 'user' theme is an exception: it is frequently
|
||
used for ad-hoc customizations, so the settings of that theme are by
|
||
default applied immediately.
|
||
|
||
The variable 'custom--inhibit-theme-enable' controls this behavior;
|
||
its default value changed in Emacs 27.1.
|
||
|
||
** The REPETITIONS argument of 'benchmark-run' can now also be a variable.
|
||
|
||
** Interpretation of relative 'HOME' directory has changed.
|
||
If "$HOME" is set to a relative file name, 'expand-file-name' now
|
||
interprets it relative to the directory where Emacs was started, not
|
||
relative to the 'default-directory' of the current buffer. We recommend
|
||
always setting "$HOME" to an absolute file name, so that its meaning is
|
||
independent of where Emacs was started.
|
||
|
||
** 'file-name-absolute-p' no longer considers "~foo" to be an absolute
|
||
file name if there is no user named "foo".
|
||
|
||
** The FILENAME argument to 'file-name-base' is now mandatory and no
|
||
longer defaults to 'buffer-file-name'.
|
||
|
||
** File metadata primitives now signal an error if I/O, access, or
|
||
other serious errors prevent them from determining the result.
|
||
Formerly, these functions often (though not always) silently returned
|
||
nil. For example, if there is an access error, I/O error or low-level
|
||
integer overflow when getting the attributes of a file F,
|
||
'(file-attributes F)' now signals an error instead of returning nil.
|
||
These functions still behave as before if the only problem is that the
|
||
file does not exist. The affected primitives are
|
||
'directory-files-and-attributes', 'file-acl', 'file-attributes',
|
||
'file-modes', 'file-newer-than-file-p', 'file-selinux-context',
|
||
'file-system-info', and 'set-visited-file-modtime'.
|
||
|
||
** The function 'eldoc-message' now accepts a single argument.
|
||
Programs that called it with multiple arguments before should pass
|
||
them through 'format' first. Even that is discouraged: for ElDoc
|
||
support, you should set 'eldoc-documentation-function' instead of
|
||
calling 'eldoc-message' directly.
|
||
|
||
** Old-style backquotes now generate an error.
|
||
They have been generating warnings for a decade. To interpret
|
||
old-style backquotes as new-style, bind the new variable
|
||
'force-new-style-backquotes' to t.
|
||
|
||
** Defining a Common Lisp structure using 'cl-defstruct' or
|
||
'cl-struct-define' whose name clashes with a builtin type (e.g.,
|
||
'integer' or 'hash-table') now signals an error.
|
||
|
||
** When formatting a floating-point number as an octal or hexadecimal
|
||
integer, Emacs now signals an error if the number is too large for the
|
||
implementation to format.
|
||
|
||
** 'logb' now returns infinity when given an infinite or zero argument,
|
||
and returns a NaN when given a NaN. Formerly, it returned an extreme
|
||
fixnum for such arguments.
|
||
|
||
** Some functions and variables obsolete since Emacs 22 have been removed:
|
||
'archive-mouse-extract', 'assoc-ignore-case', 'assoc-ignore-representation',
|
||
'backward-text-line', 'blink-cursor', 'bookmark-exit-hooks',
|
||
'c-opt-op-identitier-prefix', 'comint-use-prompt-regexp-instead-of-fields',
|
||
'compilation-finish-function', 'count-text-lines', 'cperl-vc-header-alist',
|
||
'custom-face-save-command', 'cvs-display-full-path', 'cvs-fileinfo->full-path',
|
||
'delete-frame-hook', 'derived-mode-class', 'describe-char-after',
|
||
'describe-project', 'desktop-basefilename', 'desktop-buffer-handlers',
|
||
'desktop-buffer-misc-functions', 'desktop-buffer-modes-to-save',
|
||
'desktop-enable', 'desktop-load-default', 'dired-omit-files-p',
|
||
'disabled-command-hook', 'dungeon-mode-map', 'electric-nroff-mode',
|
||
'electric-nroff-newline', 'electric-perl-terminator', 'executing-macro',
|
||
'focus-frame', 'forward-text-line', 'generic-define-mswindows-modes',
|
||
'generic-define-unix-modes', 'generic-font-lock-defaults',
|
||
'goto-address-at-mouse', 'highlight-changes-colours',
|
||
'ibuffer-elide-long-columns', 'ibuffer-hooks', 'ibuffer-mode-hooks',
|
||
'icalendar-convert-diary-to-ical', 'icalendar-extract-ical-from-buffer',
|
||
'imenu-always-use-completion-buffer-p', 'ipconfig-program',
|
||
'ipconfig-program-options', 'isearch-lazy-highlight-cleanup',
|
||
'isearch-lazy-highlight-initial-delay', 'isearch-lazy-highlight-interval',
|
||
'isearch-lazy-highlight-max-at-a-time', 'iswitchb-use-fonts',
|
||
'latin1-char-displayable-p', 'mouse-wheel-click-button',
|
||
'mouse-wheel-down-button', 'mouse-wheel-up-button', 'new-frame',
|
||
'pascal-outline', 'process-kill-without-query',
|
||
'recentf-menu-append-commands-p', 'rmail-pop-password',
|
||
'rmail-pop-password-required', 'savehist-load', 'set-default-font',
|
||
'spam-list-of-processors', 'speedbar-add-ignored-path-regexp',
|
||
'speedbar-buffers-line-path', 'speedbar-ignored-path-expressions',
|
||
'speedbar-ignored-path-regexp', 'speedbar-line-path', 'speedbar-path-line',
|
||
'timer-set-time-with-usecs', 'tooltip-gud-display', 'tooltip-gud-modes',
|
||
'tooltip-gud-toggle-dereference', 'unfocus-frame', 'unload-hook-features-list',
|
||
'update-autoloads-from-directories', 'vc-comment-ring', 'vc-comment-ring-index',
|
||
'vc-comment-search-forward', 'vc-comment-search-reverse',
|
||
'vc-comment-to-change-log', 'vc-diff-switches-list', 'vc-next-comment',
|
||
'vc-previous-comment', 'view-todo', 'x-lost-selection-hooks',
|
||
'x-sent-selection-hooks'.
|
||
|
||
** Further functions and variables obsolete since Emacs 24 have been removed:
|
||
'default-directory-alist', 'dired-default-directory',
|
||
'dired-default-directory-alist', 'dired-enable-local-variables',
|
||
'dired-hack-local-variables', 'dired-local-variables-file',
|
||
'dired-omit-here-always'.
|
||
|
||
** Garbage collection no longer treats miscellaneous objects specially;
|
||
they are now allocated like any other pseudovector. As a result, the
|
||
'garbage-collect' and 'memory-use-count' functions no longer return a
|
||
'misc' component, and the 'misc-objects-consed' variable has been
|
||
removed.
|
||
|
||
** Reversed character ranges are no longer permitted in 'rx'.
|
||
Previously, ranges where the starting character is greater than the
|
||
ending character were silently omitted.
|
||
For example, '(rx (any "@z-a" (?9 . ?0)))' would match '@' only.
|
||
Now, such 'rx' expressions generate an error.
|
||
|
||
** Internal 'rx' functions and variables have been removed,
|
||
as a consequence of an improved implementation. Packages using
|
||
these should use the public 'rx' and 'rx-to-string' instead.
|
||
'rx-constituents' is still available for compatibility, but the new
|
||
extension mechanism is preferred: 'rx-define', 'rx-let' and
|
||
'rx-let-eval'.
|
||
|
||
** 'text-mode' no longer sets the value of 'indent-line-function'.
|
||
The global value of 'indent-line-function', which defaults to
|
||
'indent-relative', will no longer be reset locally when turning on
|
||
'text-mode'.
|
||
|
||
To get back the old behavior, add a function to 'text-mode-hook' which
|
||
performs '(setq-local indent-line-function #'indent-relative)'.
|
||
|
||
** 'make-process' no longer accepts a non-nil ':stop' key. This has
|
||
never worked reliably, and now causes an error.
|
||
|
||
** 'eventp' no longer returns non-nil for lists whose car is nil.
|
||
This is consistent with the fact that nil, though a symbol, is not a
|
||
valid event type.
|
||
|
||
** The obsolete package xesam.el (since Emacs 24) has been removed.
|
||
|
||
** The XBM image handler now accepts a ':stride' argument, which should
|
||
be specified in image specs representing the entire bitmap as a single
|
||
bool vector.
|
||
|
||
** 'regexp-quote' may return its argument string.
|
||
If the argument needs no quoting, it can be returned instead of a copy.
|
||
|
||
** Mouse scroll up and down with control key modifier changes font size.
|
||
Previously, the control key modifier was used to scroll up or down by
|
||
an amount which was close to near a full screen. This is now instead
|
||
available by scrolling with the meta modifier key.
|
||
|
||
To get the old behavior back, customize the user option
|
||
'mouse-wheel-scroll-amount', or add the following to your init file:
|
||
|
||
(customize-set-variable 'mouse-wheel-scroll-amount
|
||
'(5 ((shift) . 1) ((control) . nil)))
|
||
|
||
By default, the font size will be changed in the window that the mouse
|
||
pointer is over. To change this behavior, you can customize the user
|
||
option 'mouse-wheel-follow-mouse'. Note that this will also affect
|
||
scrolling.
|
||
|
||
** Mouse scroll up and down with control key modifier also works on images
|
||
where it scales the image under the mouse pointer.
|
||
|
||
** 'help-follow-symbol' now signals 'user-error' if point (or the
|
||
position pointed to by the argument POS) is not in a symbol.
|
||
|
||
** The options.el library has been removed.
|
||
It was obsolete since Emacs 22.1, replaced by customize.
|
||
|
||
** The tls.el and starttls.el libraries are now marked obsolete.
|
||
Use of built-in libgnutls based functionality (described in the Emacs
|
||
GnuTLS manual) is recommended instead.
|
||
|
||
** The url-ns.el library is now marked obsolete.
|
||
This library is used to open configuration files for the long defunct
|
||
web browser Netscape, and is no longer relevant.
|
||
|
||
|
||
* Lisp Changes in Emacs 27.1
|
||
|
||
** Emacs Lisp integers can now be of arbitrary size.
|
||
Emacs uses the GNU Multiple Precision (GMP) library to support
|
||
integers whose size is too large to support natively. The integers
|
||
supported natively are known as "fixnums", while the larger ones are
|
||
"bignums". The new predicates 'bignump' and 'fixnump' can be used to
|
||
distinguish between these two types of integers.
|
||
|
||
All the arithmetic, comparison, and logical (a.k.a. "bitwise")
|
||
operations where bignums make sense now support both fixnums and
|
||
bignums. However, note that unlike fixnums, bignums will not compare
|
||
equal with 'eq', you must use 'eql' instead. (Numerical comparison
|
||
with '=' works on both, of course.)
|
||
|
||
Since large bignums consume a lot of memory, Emacs limits the size of
|
||
the largest bignum a Lisp program is allowed to create. The
|
||
nonnegative value of the new variable 'integer-width' specifies the
|
||
maximum number of bits allowed in a bignum. Emacs signals an integer
|
||
overflow error if this limit is exceeded.
|
||
|
||
Several primitive functions formerly returned floats or lists of
|
||
integers to represent integers that did not fit into fixnums. These
|
||
functions now simply return integers instead. Affected functions
|
||
include functions like 'encode-char' that compute code-points, functions
|
||
like 'file-attributes' that compute file sizes and other attributes,
|
||
functions like 'process-id' that compute process IDs, and functions like
|
||
'user-uid' and 'group-gid' that compute user and group IDs.
|
||
|
||
** 'overflow-error' is now documented as a subcategory of 'range-error'.
|
||
Formerly it was undocumented, and was (incorrectly) a subcategory
|
||
of 'domain-error'.
|
||
|
||
** Time values
|
||
|
||
*** New function 'time-convert' converts Lisp time values to Lisp
|
||
timestamps of various forms, including a new timestamp form '(TICKS
|
||
. HZ)' where TICKS is an integer and HZ a positive integer denoting a
|
||
clock frequency.
|
||
|
||
*** Although the default timestamp format is still '(HI LO US PS)',
|
||
it is planned to change in a future Emacs version, to exploit bignums.
|
||
The documentation has been updated to mention that the timestamp
|
||
format may change and that programs should use functions like
|
||
'format-time-string', 'decode-time', and 'time-convert' rather than
|
||
probing the innards of a timestamp directly, or creating a timestamp
|
||
by hand.
|
||
|
||
*** Decoded (calendrical) timestamps now have subsecond resolution.
|
||
This affects 'decode-time', which generates these timestamps, as well
|
||
as functions like 'encode-time' that accept them. The subsecond info
|
||
is present as a '(TICKS . HZ)' value in the seconds element of a
|
||
decoded timestamp, and 'decode-time' has a new optional FORM argument
|
||
specifying the form of the seconds member. For example, if X is the
|
||
timestamp '(1566009571321878186 . 1000000000)', which represents
|
||
"2019-08-17 02:39:31.321878186 UTC", '(decode-time X t t)' returns
|
||
'((31321878186 . 1000000000) 39 2 17 8 2019 6 nil 0)' instead of the
|
||
traditional '(31 39 2 17 8 2019 6 nil 0)' returned by plain
|
||
'(decode-time X t)'. Although the default FORM is currently
|
||
'integer', which truncates the seconds to an integer and is the
|
||
traditional behavior, this default may change in future Emacs
|
||
versions, so callers requiring an integer should specify FORM
|
||
explicitly.
|
||
|
||
*** 'encode-time' supports a new API '(encode-time TIME)'.
|
||
The old 'encode-time' API is still supported.
|
||
|
||
*** A new package to parse ISO 8601 time, date, durations and
|
||
intervals has been added. The main function to use is
|
||
'iso8601-parse', but there's also 'iso8601-parse-date',
|
||
'iso8601-parse-time', 'iso8601-parse-duration' and
|
||
'iso8601-parse-interval'. All these functions return decoded time
|
||
structures, except the final one, which returns three of them (start,
|
||
end and duration).
|
||
|
||
*** 'time-add', 'time-subtract', and 'time-less-p' now accept
|
||
infinities and NaNs too, and propagate them or return nil like
|
||
floating-point operators do. If both arguments are finite, these
|
||
functions now return exact results instead of rounding in some cases,
|
||
and they also avoid excess precision when that is easy.
|
||
|
||
*** New function 'time-equal-p' compares time values for equality.
|
||
|
||
*** 'format-time-string' supports a new conversion specifier flag '+'
|
||
that acts like the '0' flag but also puts a '+' before nonnegative
|
||
years containing more than four digits. This is for compatibility
|
||
with POSIX.1-2017.
|
||
|
||
*** To access (or alter) the elements of a decoded time value, the
|
||
'decoded-time-second', 'decoded-time-minute', 'decoded-time-hour',
|
||
'decoded-time-day', 'decoded-time-month', 'decoded-time-year',
|
||
'decoded-time-weekday', 'decoded-time-dst' and 'decoded-time-zone'
|
||
accessors can be used.
|
||
|
||
*** The new functions 'date-days-in-month' (which will say how many
|
||
days there are in a month in a specific year), 'date-ordinal-to-time'
|
||
(that computes the date of an ordinal day), 'decoded-time-add' (for
|
||
doing computations on a decoded time structure), 'make-decoded-time'
|
||
(for making a decoded time structure with only the given keywords
|
||
filled out), and 'decoded-time-set-defaults' (which fills in nil
|
||
elements as if it's midnight January 1st, 1970) have been added.
|
||
|
||
*** In the DST slot, 'encode-time' and 'parse-time-string' now return -1
|
||
if it is not known whether daylight saving time is in effect.
|
||
Formerly they were inconsistent: 'encode-time' returned t in this
|
||
situation, whereas 'parse-time-string' returned nil. Now they
|
||
consistently use nil to mean that DST is not in effect, and use -1
|
||
to mean that it is not known whether DST is in effect.
|
||
|
||
** New macro 'benchmark-progn'.
|
||
This macro works like 'progn', but messages how long it takes to
|
||
evaluate the body forms. The value of the last form is the return
|
||
value.
|
||
|
||
** New function 'read-char-from-minibuffer'.
|
||
This function works like 'read-char', but uses 'read-from-minibuffer'
|
||
to read a character, so it maintains a history that can be navigated
|
||
via usual minibuffer keystrokes 'M-p'/'M-n'.
|
||
|
||
** New variables 'set-message-function' and 'clear-message-function'
|
||
can be used to specify functions to show and clear messages that
|
||
normally are displayed in the echo area.
|
||
|
||
** 'setq-local' can now set an arbitrary number of variables, which
|
||
makes the syntax more like 'setq'.
|
||
|
||
** 'reveal-mode' can now also be used for more than to toggle between
|
||
invisible and visible: It can also toggle 'display' properties in
|
||
overlays. This is only done on 'display' properties that have the
|
||
'reveal-toggle-invisible' property set.
|
||
|
||
** 'process-contact' now takes an optional NO-BLOCK argument to allow
|
||
not waiting for a process to be set up.
|
||
|
||
** New variable 'read-process-output-max' controls sub-process throughput.
|
||
This variable determines how many bytes can be read from a sub-process
|
||
in one read operation. The default, 4096 bytes, was previously a
|
||
hard-coded constant. Setting it to a larger value might enhance
|
||
throughput of reading from sub-processes that produce vast
|
||
(megabytes) amounts of data in one go.
|
||
|
||
** The new user option 'quit-window-hook' is now run first when
|
||
executing the 'quit-window' command.
|
||
|
||
** The user options 'help-enable-completion-auto-load',
|
||
'help-enable-auto-load' and 'vhdl-project-auto-load', as well as the
|
||
function 'vhdl-auto-load-project' have been renamed to have "autoload"
|
||
without the hyphen in their names. Obsolete aliases from the old
|
||
names have been added.
|
||
|
||
** Buttons (created with 'make-button' and related functions) can
|
||
now use the 'button-data' property. If present, the data in this
|
||
property will be passed on to the 'action' function instead of the
|
||
button itself in 'button-activate'.
|
||
|
||
** 'defcustom' now takes a ':local' keyword that can be either t or
|
||
'permanent', which mean that the variable should be automatically
|
||
buffer-local. 'permanent' also sets the variable's 'permanent-local'
|
||
property.
|
||
|
||
** The new macro 'with-suppressed-warnings' can be used to suppress
|
||
specific byte-compile warnings.
|
||
|
||
** The new macro 'ignore-error' is like 'ignore-errors', but takes a
|
||
specific error condition, and will only ignore that condition. (This
|
||
can also be a list of conditions.)
|
||
|
||
** The new function 'byte-compile-info-message' can be used to output
|
||
informational messages that look pleasing during the Emacs build.
|
||
|
||
** New 'help-fns-describe-variable-functions' hook.
|
||
It makes it possible to add metadata information to 'describe-variable'.
|
||
|
||
** i18n (internationalization)
|
||
|
||
*** 'ngettext' can be used now to return the right plural form
|
||
according to the given numeric value.
|
||
|
||
** 'inhibit-null-byte-detection' is renamed to 'inhibit-nul-byte-detection'.
|
||
|
||
** 'self-insert-command' takes the char to insert as (optional) argument.
|
||
|
||
** 'lookup-key' can take a list of keymaps as argument.
|
||
|
||
** 'condition-case' now accepts t to match any error symbol.
|
||
|
||
** New function 'proper-list-p'.
|
||
Given a proper list as argument, this predicate returns its length;
|
||
otherwise, it returns nil. 'format-proper-list-p' is now an obsolete
|
||
alias for the new function.
|
||
|
||
** 'define-minor-mode' automatically documents the meaning of ARG.
|
||
|
||
** The function 'recenter' now accepts an additional optional argument.
|
||
By default, calling 'recenter' will not redraw the frame even if
|
||
'recenter-redisplay' is non-nil. Call 'recenter' with the new second
|
||
argument non-nil to force redisplay per 'recenter-redisplay's value.
|
||
|
||
** New functions 'major-mode-suspend' and 'major-mode-restore'.
|
||
Use them when switching temporarily to another major mode, e.g. for
|
||
'hexl-mode', or to switch between 'c-mode' and 'image-mode' in XPM.
|
||
|
||
** New macro 'dolist-with-progress-reporter'.
|
||
This works like 'dolist', but reports progress similar to
|
||
'dotimes-with-progress-reporter'.
|
||
|
||
** New hook 'after-delete-frame-functions'.
|
||
This works like 'delete-frame-functions', but runs after the frame to
|
||
be deleted has been made dead and removed from the frame list.
|
||
|
||
** The function 'provided-mode-derived-p' was extended to support aliases.
|
||
The function now returns non-nil when the argument MODE is derived
|
||
from any alias of any of MODES.
|
||
|
||
** New frame focus state inspection interface.
|
||
The hooks 'focus-in-hook' and 'focus-out-hook' are now obsolete.
|
||
Instead, attach to 'after-focus-change-function' using 'add-function'
|
||
and inspect the focus state of each frame using 'frame-focus-state'.
|
||
|
||
** Emacs now requests and recognizes focus-change notifications from TTYs.
|
||
On terminal emulators that support the feature, Emacs can now support
|
||
'focus-in-hook' and 'focus-out-hook' for TTY frames.
|
||
|
||
** Window-specific face remapping.
|
||
Face specifications (of the kind used in 'face-remapping-alist')
|
||
now support filters, allowing faces to vary between different windows
|
||
displaying the same buffer. See the node "(elisp) Face Remapping"
|
||
of the Emacs Lisp Reference manual for more detail.
|
||
|
||
** Window change functions have been redesigned.
|
||
Hooks reacting to window changes run now only when redisplay detects
|
||
that a change has actually occurred. Six hooks are now provided:
|
||
'window-buffer-change-functions' (run after window buffers have
|
||
changed), 'window-size-change-functions' (run after a window was
|
||
assigned a new buffer or size), 'window-configuration-change-hook'
|
||
(like the former but run also when a window was deleted),
|
||
'window-selection-change-functions' (run when the selected window
|
||
changed) and 'window-state-change-functions' and
|
||
'window-state-change-hook' (run when any of the preceding ones is
|
||
run). Applications can enforce running the latter two using the new
|
||
function 'set-frame-window-state-change'. 'window-scroll-functions'
|
||
are unaffected by these changes.
|
||
|
||
In addition, a number of functions now allow the caller to detect what
|
||
has changed since last redisplay: 'window-old-buffer' returns for any
|
||
window the buffer it showed at that time. 'old-selected-window' and
|
||
'old-selected-frame' return the window and frame that were selected
|
||
during last redisplay. 'window-old-pixel-width' (renamed from
|
||
'window-pixel-width-before-size-change'), 'window-old-pixel-height'
|
||
(renamed from 'window-pixel-height-before-size-change'),
|
||
'window-old-body-pixel-width' and 'window-old-body-pixel-height'
|
||
return the total and body sizes of any window during last redisplay.
|
||
|
||
Also 'run-window-configuration-change-hook' is declared obsolete.
|
||
|
||
See the section "(elisp) Window Hooks" in the Elisp manual for a
|
||
detailed explanation of the new behavior.
|
||
|
||
** Scroll bar and fringe settings can now be made persistent for windows.
|
||
The functions 'set-window-scroll-bars' and 'set-window-fringes' now
|
||
have a new optional argument that makes the settings they produce
|
||
reliably survive subsequent invocations of 'set-window-buffer'.
|
||
|
||
** New user option 'resize-mini-frames'.
|
||
This option allows automatically resizing minibuffer-only frames
|
||
similarly to how minibuffer windows are resized on "normal" frames.
|
||
|
||
** New buffer display action function 'display-buffer-in-direction'.
|
||
This function allows specifying the location of the window chosen by
|
||
'display-buffer' in various ways.
|
||
|
||
** New buffer display action alist entry 'dedicated'.
|
||
Such an entry allows specifying the dedicated status of a window
|
||
created by 'display-buffer'.
|
||
|
||
** New buffer display action alist entry 'window-min-height'.
|
||
Such an entry allows specifying a minimum height of the window used
|
||
for displaying a buffer. 'display-buffer-below-selected' is the only
|
||
action function to respect it at the moment.
|
||
|
||
** New buffer display action alist entry 'direction'.
|
||
This entry is used to specify the location of the window chosen by
|
||
'display-buffer-in-direction'.
|
||
|
||
** Additional meaning of display action alist entry 'window'.
|
||
A 'window' entry can now also specify a reference window for
|
||
'display-buffer-in-direction'.
|
||
|
||
** The function 'assoc-delete-all' now takes an optional predicate argument.
|
||
|
||
** New function 'string-distance' to calculate the Levenshtein distance
|
||
between two strings.
|
||
|
||
** 'print-quoted' now defaults to t, so if you want to see
|
||
'(quote x)' instead of 'x you will have to bind it to nil where applicable.
|
||
|
||
** Numbers formatted via '%o' or '%x' are now formatted as signed integers.
|
||
This avoids problems in calls like '(read (format "#x%x" -1))', and is
|
||
more compatible with bignums. To get the traditional machine-dependent
|
||
behavior, set the experimental variable 'binary-as-unsigned' to t,
|
||
and if the new behavior breaks your code please email
|
||
<32252@debbugs.gnu.org>. Because '%o' and '%x' can now format signed
|
||
integers, they now support the '+' and space flags.
|
||
|
||
** In Emacs Lisp mode, symbols with confusable quotes are highlighted.
|
||
For example, the first character in '‘foo' would be highlighted in
|
||
'font-lock-warning-face'.
|
||
|
||
** Omitting variables after '&optional' and '&rest' is now allowed.
|
||
For example '(defun foo (&optional))' is no longer an error. This is
|
||
sometimes convenient when writing macros. See the ChangeLog entry
|
||
titled "Allow '&rest' or '&optional' without following variable
|
||
(Bug#29165)" for a full listing of which arglists are accepted across
|
||
versions.
|
||
|
||
** Internal parsing commands now use 'syntax-ppss' and disregard
|
||
'open-paren-in-column-0-is-defun-start'. This affects mostly things like
|
||
'forward-comment', 'scan-sexps', and 'forward-sexp' when parsing backward.
|
||
The new variable 'comment-use-syntax-ppss' can be set to nil to recover
|
||
the old behavior if needed.
|
||
This also means that there is no longer any need to precede opening
|
||
brackets at the start of a line inside documentation strings with a
|
||
backslash, although there is no harm in doing so to make the code
|
||
easier to edit with an older Emacs version.
|
||
|
||
** New symbolic accessor functions for a parse state list.
|
||
The new accessor functions 'ppss-depth', 'ppss-list-start',
|
||
'ppss-last-sexp-start', 'ppss-string-terminator', 'comment-depth',
|
||
'quoted-p', 'comment-style', 'comment-or-string-start', 'open-parens',
|
||
and 'two-character-syntax' can be used on the list value returned by
|
||
'parse-partial-sexp' and 'syntax-ppss'.
|
||
|
||
** The 'server-name' and 'server-socket-dir' variables are set when a
|
||
socket has been passed to Emacs.
|
||
|
||
** The 'file-system-info' function is now available on all platforms.
|
||
instead of just Microsoft platforms. This fixes a 'get-free-disk-space'
|
||
bug on OS X 10.8 and later.
|
||
|
||
** The function 'get-free-disk-space' returns now a non-nil value for
|
||
remote systems, which support this check.
|
||
|
||
** 'memory-limit' now returns a better estimate of memory consumption.
|
||
|
||
** When interpreting 'gc-cons-percentage', Emacs now estimates the
|
||
heap size more often and (we hope) more accurately. E.g., formerly
|
||
'(progn (let ((gc-cons-percentage 0.8)) BODY1) BODY2)' continued to use
|
||
the 0.8 value during BODY2 until the next garbage collection, but that
|
||
is no longer true. Applications may need to re-tune their GC tricks.
|
||
|
||
** New macro 'combine-change-calls' arranges to call the change hooks
|
||
('before-change-functions' and 'after-change-functions') just once
|
||
each around a sequence of lisp forms, given a region. This is
|
||
useful when a function makes a possibly large number of repetitive
|
||
changes and the change hooks are time consuming.
|
||
|
||
** 'eql', 'make-hash-table', etc. now treat NaNs consistently.
|
||
Formerly, some of these functions ignored signs and significands of
|
||
NaNs. Now, all these functions treat NaN signs and significands as
|
||
significant. For example, '(eql 0.0e+NaN -0.0e+NaN)' now returns nil
|
||
because the two NaNs have different signs; formerly it returned t.
|
||
Also, Emacs now reads and prints NaN significands; e.g., if X is a
|
||
NaN, '(format "%s" X)' now returns "0.0e+NaN", "1.0e+NaN", etc.,
|
||
depending on X's significand.
|
||
|
||
** The function 'make-string' accepts an additional optional argument.
|
||
If the optional third argument is non-nil, 'make-string' will produce
|
||
a multibyte string even if its second argument is an ASCII character.
|
||
|
||
** '(format "%d" X)' no longer mishandles a floating-point number X that
|
||
does not fit in a machine integer.
|
||
|
||
** New coding-system 'ibm038'.
|
||
This is the International EBCDIC encoding, also available as aliases
|
||
'ebcdic-int' and 'cp038'.
|
||
|
||
** New JSON parsing and serialization functions 'json-serialize',
|
||
'json-insert', 'json-parse-string', and 'json-parse-buffer'. These
|
||
are implemented in C using the Jansson library.
|
||
|
||
** New function 'ring-resize'.
|
||
'ring-resize' can be used to grow or shrink a ring.
|
||
|
||
** New function 'flatten-tree'.
|
||
'flatten-list' is provided as an alias. These functions take a tree
|
||
and 'flatten' it such that the result is a list of all the terminal
|
||
nodes.
|
||
|
||
** 'zlib-decompress-region' can partially decompress corrupted data.
|
||
If the new optional ALLOW-PARTIAL argument is passed, then the data
|
||
that was decompressed successfully before failing will be inserted
|
||
into the buffer.
|
||
|
||
** Image mode
|
||
|
||
*** New library Exif.
|
||
An Exif library has been added that can parse JPEG files and output
|
||
data about creation times and orientation and the like.
|
||
'exif-parse-file' and 'exif-parse-buffer' are the main interface
|
||
functions.
|
||
|
||
*** 'image-mode' now uses this library to automatically rotate images
|
||
according to the orientation in the Exif data, if any.
|
||
|
||
*** The command 'image-rotate' now accepts a prefix argument.
|
||
With a prefix argument, 'image-rotate' now rotates the image at point
|
||
90 degrees counter-clockwise, instead of the default clockwise.
|
||
|
||
*** In 'image-mode' the image is resized automatically to fit in window.
|
||
By default, the image will resize upon first display and whenever the
|
||
window's dimensions change. Two user options 'image-auto-resize' and
|
||
'image-auto-resize-on-window-resize' control the resizing behavior
|
||
(including the possibility to disable auto-resizing). A new prefix
|
||
key 's' contains the commands that can be used to fit the image to the
|
||
window manually.
|
||
|
||
*** Some 'image-mode' variables are now buffer-local.
|
||
The image parameters 'image-transform-rotation',
|
||
'image-transform-scale' and 'image-transform-resize' are now declared
|
||
buffer-local, so each buffer could have its own values for these
|
||
parameters.
|
||
|
||
*** Three new 'image-mode' commands have been added: 'm', which marks
|
||
the file in the dired buffer(s) for the directory the file is in; 'u',
|
||
which unmarks the file; and 'w', which pushes the current buffer's file
|
||
name to the kill ring.
|
||
|
||
*** New library image-converter.
|
||
If you need to view exotic image formats for which Emacs doesn't have
|
||
native support, customize the new user option
|
||
'image-use-external-converter' to t. If your system has
|
||
GraphicsMagick, ImageMagick or 'ffmpeg' installed, they will then be
|
||
used to convert images automatically before displaying them.
|
||
|
||
*** 'auto-mode-alist' now includes many of the types typically
|
||
supported by the external image converters, like WEPB, BMP and ICO.
|
||
These now default to using 'image-mode'.
|
||
|
||
*** 'imagemagick-types-inhibit' disables using ImageMagick by default.
|
||
'image-mode' started using ImageMagick by default for all images
|
||
some years back. It now respects 'imagemagick-types-inhibit' as a way
|
||
to disable that.
|
||
|
||
** Modules
|
||
|
||
*** The function 'load' now behaves correctly when loading modules.
|
||
Specifically, it puts the module name into 'load-history', prints
|
||
loading messages if requested, and protects against recursive loads.
|
||
|
||
*** New module environment function 'process_input' to process user
|
||
input while module code is running.
|
||
|
||
*** New module environment functions 'make_time' and 'extract_time' to
|
||
convert between timespec structures and Emacs Lisp time values.
|
||
|
||
*** New module environment functions 'make_big_integer' and
|
||
'extract_big_integer' to create and extract arbitrary-size integer
|
||
values.
|
||
|
||
*** emacs-module.h now defines a macro 'EMACS_MAJOR_VERSION' that expands
|
||
to the major version of the latest Emacs supported by the header.
|
||
|
||
** The function 'read-variable' now uses its own history list.
|
||
The history of variable names read by 'read-variable' is recorded in
|
||
the new variable 'custom-variable-history'.
|
||
|
||
** The functions 'string-to-unibyte' and 'string-to-multibyte' are no
|
||
longer declared obsolete. We have found that there are legitimate use
|
||
cases for these functions, where there's no better alternative. We
|
||
believe that the incorrect uses of these functions all but disappeared
|
||
by now, so we are un-obsoleting them.
|
||
|
||
** New function 'group-name' returns a group name corresponding to GID.
|
||
|
||
** 'make-process' now takes a keyword argument ':file-handler'; if
|
||
that is non-nil, it will look for a file name handler for the current
|
||
buffer's 'default-directory' and invoke that file name handler to make
|
||
the process. That way 'make-process' can start remote processes.
|
||
|
||
** '(locale-info 'paper)' now returns the paper size on systems that support it.
|
||
This is currently supported on GNUish hosts and on modern versions of
|
||
MS-Windows.
|
||
|
||
** The function 'regexp-opt', when given an empty list of strings, now
|
||
returns a regexp that never matches anything, which is an identity for
|
||
this operation. Previously, the empty string was returned in this
|
||
case.
|
||
|
||
** New constant 'regexp-unmatchable' contains a never-matching regexp.
|
||
It is a convenient and readable way to specify a regexp that should
|
||
not match anything, and is as fast as any such regexp can be.
|
||
|
||
** New functions to handle the URL variant of base-64 encoding.
|
||
New functions 'base64url-encode-string' and 'base64url-encode-region'
|
||
implement the url-variant of base-64 encoding as defined in RFC4648.
|
||
|
||
The functions 'base64-decode-string' and 'base64-decode-region' now
|
||
accept an optional argument to decode the URL variant of base-64
|
||
encoding.
|
||
|
||
** The function 'file-size-human-readable' accepts more optional arguments.
|
||
The new third argument is a string put between the number and unit; it
|
||
defaults to the empty string. The new fourth argument is a string
|
||
representing the unit to use; it defaults to "B" when the second
|
||
argument is 'iec' and the empty string otherwise. We recommend a
|
||
space or non-breaking space as third argument, and "B" as fourth
|
||
argument, circumstances allowing.
|
||
|
||
** 'format-spec' has been expanded with several modifiers to allow
|
||
greater flexibility when customizing variables. The modifiers include
|
||
zero-padding, upper- and lower-casing, and limiting the length of the
|
||
interpolated strings. The function has now also been documented in
|
||
the Emacs Lisp manual.
|
||
|
||
** 'directory-files-recursively' can now take an optional PREDICATE
|
||
parameter to control descending into subdirectories, and a
|
||
FOLLOW-SYMLINK parameter to say that symbolic links that point to
|
||
other directories should be followed.
|
||
|
||
** New function 'xor' returns the boolean exclusive-or of its args.
|
||
The function was previously defined in array.el, but has been moved to
|
||
subr.el so that it is available by default. It now always returns the
|
||
non-nil argument when the other is nil. Several duplicates of 'xor'
|
||
in other packages are now obsolete aliases of 'xor'.
|
||
|
||
** 'define-globalized-minor-mode' now takes BODY forms.
|
||
|
||
** New text property 'help-echo-inhibit-substitution'.
|
||
Setting this on the first character of a help string disables
|
||
conversions via 'substitute-command-keys'.
|
||
|
||
** New text property 'minibuffer-message'.
|
||
Setting this on a character of the minibuffer text will display the
|
||
temporary echo messages before that character, when messages need to
|
||
be displayed while minibuffer is active.
|
||
|
||
** 'undo' can be made to ignore the active region for a command
|
||
by setting 'undo-inhibit-region' symbol property of that command to
|
||
non-nil. This is used by 'mouse-drag-region' to make the effect
|
||
easier to undo immediately afterwards.
|
||
|
||
** When called interactively, 'next-buffer' and 'previous-buffer' now
|
||
signal 'user-error' if there is no buffer to switch to.
|
||
|
||
|
||
* Changes in Emacs 27.1 on Non-Free Operating Systems
|
||
|
||
** Battery status is now supported in all Cygwin builds.
|
||
Previously it was supported only in the Cygwin-w32 build.
|
||
|
||
** Emacs now handles key combinations involving the macOS "command"
|
||
and "option" modifier keys more correctly.
|
||
|
||
** MacOS modifier key behavior is now more adjustable.
|
||
The behavior of the macOS "Option", "Command", "Control" and
|
||
"Function" keys can now be specified separately for use with
|
||
ordinary keys, function keys and mouse clicks. This allows using them
|
||
in their standard macOS way for composing characters.
|
||
|
||
** The special handling of 'frame-title-format' on NS where setting it
|
||
to t would enable the macOS proxy icon has been replaced with a
|
||
separate variable, 'ns-use-proxy-icon'. 'frame-title-format' will now
|
||
work as on other platforms.
|
||
|
||
** New primitive 'w32-read-registry'.
|
||
This primitive lets Lisp programs access the MS-Windows Registry by
|
||
retrieving values stored under a given key. It is intended to be used
|
||
for supporting features such as XDG-like location of important files
|
||
and directories.
|
||
|
||
** The default value of 'w32-pipe-read-delay' is now zero.
|
||
This speeds up reading output from sub-processes that produce a lot of
|
||
data.
|
||
|
||
This variable may need to be non-zero only when running DOS programs
|
||
as Emacs subprocesses, which by now is not supported on modern
|
||
versions of MS-Windows. Set this variable to 50 if for some reason
|
||
you need the old behavior (and please report such situations to Emacs
|
||
developers).
|
||
|
||
** New variable 'w32-multibyte-code-page'.
|
||
This variable holds the value of the multibyte code page used by the
|
||
system. It is usually zero, which indicates that 'w32-ansi-code-page'
|
||
is being used, except in Far Eastern locales. When this variable is
|
||
non-zero, Emacs at startup sets 'locale-coding-system' to the
|
||
corresponding encoding, instead of using 'w32-ansi-code-page'.
|
||
|
||
** The default value of 'inhibit-compacting-font-caches' is t on MS-Windows.
|
||
Experience shows that compacting font caches causes more trouble on
|
||
MS-Windows than it helps.
|
||
|
||
** Font lookup on MS-Windows was improved to support rare scripts.
|
||
To activate the improvement, run the new function
|
||
'w32-find-non-USB-fonts' once per Emacs session, or assign to the new
|
||
variable 'w32-non-USB-fonts' the list of scripts and the corresponding
|
||
fonts. See the documentation of this function and variable in the
|
||
Emacs manual for more details.
|
||
|
||
** On NS the behavior of drag and drop can now be modified by use of
|
||
modifier keys in line with Apples guidelines. This makes the drag and
|
||
drop behavior more consistent, as previously the sending application
|
||
was able to 'set' modifiers without the knowledge of the user.
|
||
|
||
** On NS multicolor font display is enabled again since it is also
|
||
implemented in Emacs on free operating systems via Cairo drawing.
|
||
|
||
|
||
----------------------------------------------------------------------
|
||
This file is part of GNU Emacs.
|
||
|
||
GNU Emacs is free software: you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation, either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
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.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
|
||
|
||
|
||
Local variables:
|
||
coding: utf-8
|
||
mode: outline
|
||
paragraph-separate: "[ ]*$"
|
||
end:
|