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a21dac18bb
* lisp/net/gnutls.el (gnutls-boot-parameters): Add %DUMBFW to the default priority strings (Bug#25061). * etc/NEWS: Mention it. * doc/misc/emacs-gnutls.texi (Help For Users): Point to the GnuTLS priority string documentation URL.
2061 lines
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2061 lines
72 KiB
Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2016-2017 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 26.
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See file HISTORY for a list of GNU Emacs versions and release dates.
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See files NEWS.25, NEWS.24, ..., 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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Temporary note:
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+++ indicates that all necessary documentation updates have been done.
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(This means all the relevant manuals in doc/ AND lisp doc-strings.)
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--- means doc strings are updated, and no change in the manuals is needed.
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When you add a new item, use the appropriate mark if you are sure it applies,
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* Installation Changes in Emacs 26.1
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---
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** By default libgnutls is now required when building Emacs.
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Use 'configure --with-gnutls=no' to build even when GnuTLS is missing.
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---
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** GnuTLS version 2.12.2 or later is now required, instead of merely
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version 2.6.6 or later.
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+++
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** The new option 'configure --with-mailutils' causes Emacs to rely on
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GNU Mailutils to retrieve email. It is recommended, and is the
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default if GNU Mailutils is installed. When --with-mailutils is not
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in effect, the Emacs build procedure by default continues to build and
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install a limited 'movemail' substitute that retrieves POP3 email only
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via insecure channels. To avoid this problem, use either
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--with-mailutils or --without-pop when configuring; --without-pop
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is the default on platforms other than native MS-Windows.
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---
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** The new option 'configure --enable-gcc-warnings=warn-only' causes
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GCC to issue warnings without stopping the build. This behavior is
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now the default in developer builds. As before, use
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'--disable-gcc-warnings' to suppress GCC's warnings, and
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'--enable-gcc-warnings' to stop the build if GCC issues warnings.
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---
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** When GCC warnings are enabled, '--enable-check-lisp-object-type' is
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now enabled by default when configuring.
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+++
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** The Emacs server now has socket-launching support. This allows
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socket based activation, where an external process like systemd can
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invoke the Emacs server process upon a socket connection event and
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hand the socket over to Emacs. Emacs uses this socket to service
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emacsclient commands. This new functionality can be disabled with the
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configure option '--disable-libsystemd'.
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+++
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** A systemd user unit file is provided. Use it in the standard way:
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'systemctl --user enable emacs'.
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(If your Emacs is installed in a non-standard location, you may
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need to copy the emacs.service file to eg ~/.config/systemd/user/)
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---
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** New configure option '--disable-build-details' attempts to build an
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Emacs that is more likely to be reproducible; that is, if you build
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and install Emacs twice, the second Emacs is a copy of the first.
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Deterministic builds omit the build date from the output of the
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'emacs-version' and 'erc-cmd-SV' functions, and the leave the
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following variables nil: 'emacs-build-system', 'emacs-build-time',
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'erc-emacs-build-time'.
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---
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** Emacs can now be built with support for Little CMS.
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If the lcms2 library is installed, Emacs will enable features built on
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top of that library. The new configure option '--without-lcms2' can
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be used to build without lcms2 support even if it is installed. Emacs
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linked to Little CMS exposes color management functions in Lisp: the
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color metrics 'lcms-cie-de2000' and 'lcms-cam02-ucs', as well as
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functions for conversion to and from CIE CAM02 and CAM02-UCS.
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---
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** The configure option '--with-gameuser' now defaults to 'no',
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as this appears to be the most common configuration in practice.
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When it is 'no', the shared game directory and the auxiliary program
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update-game-score are no longer needed and are not installed.
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---
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** Emacs no longer works on IRIX. We expect that Emacs users are not
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affected by this, as SGI stopped supporting IRIX in December 2013.
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* Startup Changes in Emacs 26.1
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+++
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** New option '--fg-daemon'. This is the same as '--daemon', except
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it runs in the foreground and does not fork. This is intended for
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modern init systems such as systemd, which manage many of the traditional
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aspects of daemon behavior themselves. '--bg-daemon' is now an alias
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for '--daemon'.
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+++
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** New option '--module-assertions'.
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When given this option, Emacs will perform expensive correctness
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checks when dealing with dynamic modules. This is intended for module
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authors that wish to verify that their module conforms to the module
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requirements. The option makes Emacs abort if a module-related
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assertion triggers.
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+++
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** Emacs now supports 24-bit colors on capable text terminals.
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Terminal is automatically initialized to use 24-bit colors if the
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required capabilities are found in terminfo. See the FAQ node
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"(efaq) Colors on a TTY" for more information.
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+++
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** Emacs now obeys the X resource "scrollBar" at startup.
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The effect is similar to that of "toolBar" resource on the tool bar.
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* Changes in Emacs 26.1
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+++
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** Option 'buffer-offer-save' can be set to new value, 'always'. When
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set to 'always', the command 'save-some-buffers' will always offer
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this buffer for saving.
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** Security vulnerability related to Enriched Text mode is removed.
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+++
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*** Enriched Text mode does not evaluate Lisp in 'display' properties.
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This feature allows saving 'display' properties as part of text.
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Emacs 'display' properties support evaluation of arbitrary Lisp forms
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as part of processing the property for display, so displaying Enriched
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Text could be vulnerable to executing arbitrary malicious Lisp code
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included in the text (e.g., sent as part of an email message).
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Therefore, execution of arbitrary Lisp forms in 'display' properties
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decoded by Enriched Text mode is now disabled by default. Customize
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the new option 'enriched-allow-eval-in-display-props' to a non-nil
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value to allow Lisp evaluation in decoded 'display' properties.
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This vulnerability was introduced in Emacs 21.1. To work around that
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in Emacs versions before 25.3, append the following to your ~/.emacs
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init file:
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(eval-after-load "enriched"
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'(defun enriched-decode-display-prop (start end &optional param)
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(list start end)))
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+++
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** Functions in 'write-contents-functions' can fully short-circuit the
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'save-buffer' process. Previously, saving a buffer that was not
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visiting a file would always prompt for a file name. Now it only does
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so if 'write-contents-functions' is nil (or all its functions return
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nil).
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---
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** New variable 'executable-prefix-env' for inserting magic signatures.
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This variable affects the format of the interpreter magic number
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inserted by 'executable-set-magic'. If non-nil, the magic number now
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takes the form "#!/usr/bin/env interpreter", otherwise the value
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determined by 'executable-prefix', which is by default
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"#!/path/to/interpreter". By default, 'executable-prefix-env' is nil,
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so the default behavior is not changed.
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+++
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** The variable 'emacs-version' no longer includes the build number.
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This is now stored separately in a new variable, 'emacs-build-number'.
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+++
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** Emacs now provides a limited form of concurrency with Lisp threads.
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Concurrency in Emacs Lisp is "mostly cooperative", meaning that
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Emacs will only switch execution between threads at well-defined
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times: when Emacs waits for input, during blocking operations related
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to threads (such as mutex locking), or when the current thread
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explicitly yields. Global variables are shared among all threads, but
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a 'let' binding is thread-local. Each thread also has its own current
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buffer and its own match data.
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See the chapter "(elisp) Threads" in the ELisp manual for full
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documentation of these facilities.
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+++
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** The new user variable 'electric-quote-chars' provides a list
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of curved quotes for 'electric-quote-mode', allowing user to choose
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the types of quotes to be used.
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---
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** The new user option 'electric-quote-context-sensitive' makes
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'electric-quote-mode' context sensitive. If it is non-nil, you can
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type an ASCII apostrophe to insert an opening or closing quote,
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depending on context. Emacs will replace the apostrophe by an opening
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quote character at the beginning of the buffer, the beginning of a
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line, after a whitespace character, and after an opening parenthesis;
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and it will replace the apostrophe by a closing quote character in all
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other cases.
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---
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** The new variable 'electric-quote-inhibit-functions' controls when
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to disable electric quoting based on context. Major modes can add
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functions to this list; Emacs will temporarily disable
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'electric-quote-mode' whenever any of the functions returns non-nil.
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This can be used by major modes that derive from 'text-mode' but allow
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inline code segments, such as 'markdown-mode'.
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+++
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** The new user variable 'dired-omit-case-fold' allows the user to
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customize the case-sensitivity of dired-omit-mode. It defaults to
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the same sensitivity as that of the filesystem for the corresponding
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dired buffer.
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+++
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** Emacs now uses double buffering to reduce flicker when editing and
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resizing graphical Emacs frames on the X Window System. This support
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requires the DOUBLE-BUFFER extension, which major X servers have
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supported for many years. If your system has this extension, but an
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Emacs built with double buffering misbehaves on some displays you use,
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you can disable the feature by adding
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'(inhibit-double-buffering . t)
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to default-frame-alist. Or inject this parameter into the selected
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frame by evaluating this form:
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(modify-frame-parameters nil '((inhibit-double-buffering . t)))
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---
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** The customization group 'wp', whose label was "text", is now
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deprecated. Use the new group 'text', which inherits from 'wp',
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instead.
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+++
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** The new function 'call-shell-region' executes a command in an
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inferior shell with the buffer region as input.
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+++
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** The new user option 'shell-command-dont-erase-buffer' controls
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if the output buffer is erased between shell commands; if non-nil,
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the output buffer is not erased; this variable also controls where
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to set the point in the output buffer: beginning of the output,
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end of the buffer or save the point.
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When 'shell-command-dont-erase-buffer' is nil, the default value,
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the behavior of 'shell-command', 'shell-command-on-region' and
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'async-shell-command' is as usual.
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+++
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** The new user option 'async-shell-command-display-buffer' controls
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whether the output buffer of an asynchronous command is shown
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immediately, or only when there is output.
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+++
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** The new user option 'mouse-select-region-move-to-beginning'
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controls the position of point when double-clicking mouse-1 on the end
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of a parenthetical grouping or string-delimiter: the default value nil
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keeps point at the end of the region, setting it to non-nil moves
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point to the beginning of the region.
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+++
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** The new user option 'mouse-drag-and-drop-region' allows to drag the
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entire region of text to another place or another buffer.
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+++
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** The new user option 'confirm-kill-processes' allows the user to
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skip a confirmation prompt for killing subprocesses when exiting
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Emacs. When set to t (the default), Emacs will prompt for
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confirmation before killing subprocesses on exit, which is the same
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behavior as before.
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---
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** 'find-library-name' will now fall back on looking at 'load-history'
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to try to locate libraries that have been loaded with an explicit path
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outside 'load-path'.
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+++
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** Faces in 'minibuffer-prompt-properties' no longer overwrite properties
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in the text in functions like 'read-from-minibuffer', but instead are
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added to the end of the face list. This allows users to say things
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like '(read-from-minibuffer (propertize "Enter something: " 'face 'bold))'.
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+++
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** The new variable 'extended-command-suggest-shorter' has been added
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to control whether to suggest shorter 'M-x' commands or not.
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---
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** icomplete now respects 'completion-ignored-extensions'.
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+++
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** Non-breaking hyphens are now displayed with the 'nobreak-hyphen'
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face instead of the 'escape-glyph' face.
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+++
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** Approximations to quotes are now displayed with the new 'homoglyph'
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face instead of the 'escape-glyph' face.
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+++
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** New face 'header-line-highlight'.
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This face is the header-line analogue of 'mode-line-highlight'; it
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should be the preferred mouse-face for mouse-sensitive elements in the
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header line.
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---
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** 'C-x h' ('mark-whole-buffer') will now avoid marking the prompt
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part of minibuffers.
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---
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** 'fill-paragraph' no longer marks the buffer as changed unless it
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actually changed something.
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---
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** The locale language name 'ca' is now mapped to the language
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environment 'Catalan', which has been added.
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---
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** 'align-regexp' has a separate history for its interactive argument.
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'align-regexp' no longer shares its history with all other
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history-less functions that use 'read-string'.
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+++
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** The networking code has been reworked so that it's more
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asynchronous than it was (when specifying :nowait t in
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'make-network-process'). How asynchronous it is varies based on the
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capabilities of the system, but on a typical GNU/Linux system the DNS
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resolution, the connection, and (for TLS streams) the TLS negotiation
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are all done without blocking the main Emacs thread. To get
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asynchronous TLS, the TLS boot parameters have to be passed in (see
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the manual for details).
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Certain process oriented functions (like 'process-datagram-address')
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will block until socket setup has been performed. The recommended way
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to deal with asynchronous sockets is to avoid interacting with them
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until they have changed status to "run". This is most easily done
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from a process sentinel.
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|
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---
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** 'make-network-process' and 'open-network-stream' sometimes allowed
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:service to be an integer string (e.g., :service "993") and sometimes
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required an integer (e.g., :service 993). This difference has been
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eliminated, and integer strings work everywhere.
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|
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---
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** It is possible to disable attempted recovery on fatal signals.
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Two new variables support disabling attempts to recover from stack
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overflow and to avoid automatic auto-save when Emacs is delivered a
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fatal signal. 'attempt-stack-overflow-recovery', if set to nil,
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will disable attempts to recover from C stack overflows; Emacs will
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then crash as with any other fatal signal.
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'attempt-orderly-shutdown-on-fatal-signal', if set to nil, will
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disable attempts to auto-save the session and shut down in an orderly
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fashion when Emacs receives a fatal signal; instead, Emacs will
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terminate immediately. Both variables are non-nil by default.
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These variables are for users who would like to avoid the small
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probability of data corruption due to techniques Emacs uses to recover
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in these situations.
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+++
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** File local and directory local variables are now initialized each
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time the major mode is set, not just when the file is first visited.
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These local variables will thus not vanish on setting a major mode.
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||
|
||
+++
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||
** A second dir-local file (.dir-locals-2.el) is now accepted.
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See the doc string of 'dir-locals-file' for more information.
|
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+++
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** Connection-local variables can be used to specify local variables
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with a value depending on the connected remote server. For details,
|
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see the node "(elisp) Connection Local Variables" in the ELisp manual.
|
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|
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---
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||
** International domain names (IDNA) are now encoded via the new
|
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puny.el library, so that one can visit Web sites with non-ASCII URLs.
|
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|
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+++
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** The new 'list-timers' command lists all active timers in a buffer,
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where you can cancel them with the 'c' command.
|
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|
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+++
|
||
** 'switch-to-buffer-preserve-window-point' now defaults to t.
|
||
Applications that call 'switch-to-buffer' and want to show the buffer at
|
||
the position of its point should use 'pop-to-buffer-same-window' in lieu
|
||
of 'switch-to-buffer'.
|
||
|
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+++
|
||
** The new variable 'debugger-stack-frame-as-list' allows displaying
|
||
all call stack frames in a Lisp backtrace buffer as lists. Both
|
||
debug.el and edebug.el have been updated to heed to this variable.
|
||
|
||
---
|
||
** Values in call stack frames are now displayed using 'cl-prin1'.
|
||
The old behavior of using 'prin1' can be restored by customizing the
|
||
new option 'debugger-print-function'.
|
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|
||
+++
|
||
** NUL bytes in text copied to the system clipboard are now replaced with "\0".
|
||
|
||
+++
|
||
** The new variable 'x-ctrl-keysym' has been added to the existing
|
||
roster of X keysyms. It can be used in combination with another
|
||
variable of this kind to swap modifiers in Emacs.
|
||
|
||
---
|
||
** New input methods: 'cyrillic-tuvan', 'polish-prefix', 'uzbek-cyrillic'.
|
||
|
||
---
|
||
** The 'dutch' input method no longer attempts to support Turkish too.
|
||
Also, it no longer converts 'IJ' and 'ij' to the compatibility
|
||
characters U+0132 LATIN CAPITAL LIGATURE IJ and U+0133 LATIN SMALL
|
||
LIGATURE IJ.
|
||
|
||
+++
|
||
** File name quoting by adding the prefix "/:" is now possible for the
|
||
local part of a remote file name. Thus, if you have a directory named
|
||
"/~" on the remote host "foo", you can prevent it from being
|
||
substituted by a home directory by writing it as "/foo:/:/~/file".
|
||
|
||
+++
|
||
** The new variable 'maximum-scroll-margin' allows having effective
|
||
settings of 'scroll-margin' up to half the window size, instead of
|
||
always restricting the margin to a quarter of the window.
|
||
|
||
+++
|
||
** Emacs can scroll horizontally using mouse, touchpad, and trackbar.
|
||
You can enable this by customizing 'mwheel-tilt-scroll-p'. If you
|
||
want to reverse the direction of the scroll, customize
|
||
'mwheel-flip-direction'.
|
||
|
||
+++
|
||
** The default GnuTLS priority string now includes %DUMBFW.
|
||
|
||
** Emacsclient changes
|
||
|
||
+++
|
||
*** Emacsclient has a new option '-u' / '--suppress-output'.
|
||
This option suppresses display of return values from the server
|
||
process.
|
||
|
||
+++
|
||
*** Emacsclient has a new option '-T' / '--tramp'.
|
||
This helps with using a local Emacs session as the server for a remote
|
||
emacsclient. With appropriate setup, one can now set the EDITOR
|
||
environment variable on a remote machine to emacsclient, and
|
||
use the local Emacs to edit remote files via Tramp. See the node
|
||
"(emacs) emacsclient Options" in the user manual for the details.
|
||
|
||
+++
|
||
*** Emacsclient now accepts command-line options in ALTERNATE_EDITOR
|
||
and '--alternate-editor'. For example, ALTERNATE_EDITOR="emacs -Q -nw".
|
||
Arguments may be quoted "like this", so that for example an absolute
|
||
path containing a space may be specified; quote escaping is not
|
||
supported.
|
||
|
||
---
|
||
** New user option 'dig-program-options' and extended functionality
|
||
for DNS-querying functions 'nslookup-host', 'dns-lookup-host',
|
||
and 'run-dig'. Each function now accepts an optional name server
|
||
argument interactively (with a prefix argument) and non-interactively.
|
||
|
||
+++
|
||
** 'describe-key-briefly' now ignores mouse movement events.
|
||
|
||
+++
|
||
** The new variable 'eval-expression-print-maximum-character' prevents
|
||
large integers from being displayed as characters by 'M-:' and similar
|
||
commands.
|
||
|
||
---
|
||
** Two new commands for finding the source code of Emacs Lisp
|
||
libraries: 'find-library-other-window' and 'find-library-other-frame'.
|
||
|
||
+++
|
||
** The new variable 'display-raw-bytes-as-hex' allows to change the
|
||
display of raw bytes from octal to hex.
|
||
|
||
+++
|
||
** You can now provide explicit field numbers in format specifiers.
|
||
For example, '(format "%2$s %1$s %2$s" "X" "Y")' produces "Y X Y".
|
||
|
||
+++
|
||
** Emacs now supports optional display of line numbers in the buffer.
|
||
This is similar to what 'linum-mode' provides, but much faster and
|
||
doesn't usurp the display margin for the line numbers. Customize the
|
||
buffer-local variable 'display-line-numbers' to activate this optional
|
||
display. Alternatively, you can use the 'display-line-numbers-mode'
|
||
minor mode or the global 'global-display-line-numbers-mode'. When
|
||
using these modes, customize 'display-line-numbers-type' with the same
|
||
value as you would use with 'display-line-numbers'.
|
||
|
||
Line numbers are not displayed at all in minibuffer windows and in
|
||
tooltips, as they are not useful there.
|
||
|
||
Lisp programs can disable line-number display for a particular screen
|
||
line by putting the 'display-line-numbers-disable' text property or
|
||
overlay property on the first character of that screen line. This is
|
||
intended for add-on packages that need a finer control of the display.
|
||
|
||
Lisp programs that need to know how much screen estate is used up for
|
||
line-number display in a window can use the new function
|
||
'line-number-display-width'.
|
||
|
||
'linum-mode' and all similar packages are henceforth becoming obsolete.
|
||
Users and developers are encouraged to switch to this new feature
|
||
instead.
|
||
|
||
---
|
||
** The new user option 'arabic-shaper-ZWNJ-handling' controls how to
|
||
handle ZWNJ in Arabic text rendering.
|
||
|
||
|
||
* Editing Changes in Emacs 26.1
|
||
|
||
+++
|
||
** New variable 'column-number-indicator-zero-based'.
|
||
Traditionally, in Column Number mode, the displayed column number
|
||
counts from zero starting at the left margin of the window. This
|
||
behavior is now controlled by 'column-number-indicator-zero-based'.
|
||
If you would prefer for the displayed column number to count from one,
|
||
you may set this variable to nil. (Behind the scenes, there is now a
|
||
new mode line construct, '%C', which operates exactly as '%c' does
|
||
except that it counts from one.)
|
||
|
||
+++
|
||
** New single-line horizontal scrolling mode.
|
||
The 'auto-hscroll-mode' variable can now have a new special value,
|
||
'current-line', which causes only the line where the cursor is
|
||
displayed to be horizontally scrolled when lines are truncated on
|
||
display and point moves outside the left or right window margin.
|
||
|
||
+++
|
||
** New mode line constructs '%o' and '%q', and user option
|
||
'mode-line-percent-position'. '%o' displays the "degree of travel" of
|
||
the window through the buffer. Unlike the default '%p', this
|
||
percentage approaches 100% as the window approaches the end of the
|
||
buffer. '%q' displays the percentage offsets of both the start and
|
||
the end of the window, e.g. "5-17%". The new option
|
||
'mode-line-percent-position' makes it easier to switch between '%p',
|
||
'%P', and these new constructs.
|
||
|
||
+++
|
||
** Two new user options 'list-matching-lines-jump-to-current-line' and
|
||
'list-matching-lines-current-line-face' to show the current line
|
||
highlighted in *Occur* buffer.
|
||
|
||
+++
|
||
** The 'occur' command can now operate on the region.
|
||
|
||
+++
|
||
** New bindings for 'query-replace-map'.
|
||
'undo', undo the last replacement; bound to 'u'.
|
||
'undo-all', undo all replacements; bound to 'U'.
|
||
|
||
---
|
||
** 'delete-trailing-whitespace' deletes whitespace after form feed.
|
||
In modes where form feed was treated as a whitespace character,
|
||
'delete-trailing-whitespace' would keep lines containing it unchanged.
|
||
It now deletes whitespace after the last form feed thus behaving the
|
||
same as in modes where the character is not whitespace.
|
||
|
||
---
|
||
** Emacs no longer prompts about editing a changed file when the file's
|
||
content is unchanged. Instead of only checking the modification time,
|
||
Emacs now also checks the file's actual content before prompting the user.
|
||
|
||
---
|
||
** Various casing improvements.
|
||
|
||
*** 'upcase', 'upcase-region' et al. convert title case characters
|
||
(such as Dz) into their upper case form (such as DZ).
|
||
|
||
*** 'capitalize', 'upcase-initials' et al. make use of title-case forms
|
||
of initial characters (correctly producing for example Džungla instead
|
||
of incorrect DŽungla).
|
||
|
||
*** Characters which turn into multiple ones when cased are correctly handled.
|
||
For example, fi ligature is converted to FI when upper cased.
|
||
|
||
*** Greek small sigma is correctly handled when at the end of the word.
|
||
Strings such as ΌΣΟΣ are now correctly converted to Όσος when
|
||
capitalized instead of incorrect Όσοσ (compare lowercase sigma at the
|
||
end of the word).
|
||
|
||
+++
|
||
** Emacs can now auto-save buffers to visited files in a more robust
|
||
manner via the new mode 'auto-save-visited-mode'. Unlike
|
||
'auto-save-visited-file-name', this mode uses the normal saving
|
||
procedure and therefore obeys saving hooks.
|
||
'auto-save-visited-file-name' is now obsolete.
|
||
|
||
+++
|
||
** New behavior of 'mark-defun'.
|
||
Prefix argument selects that many (or that many more) defuns.
|
||
Negative prefix arg flips the direction of selection. Also,
|
||
'mark-defun' between defuns correctly selects N following defuns (or
|
||
-N previous for negative arguments). Finally, comments preceding the
|
||
defun are selected unless they are separated from the defun by a blank
|
||
line.
|
||
|
||
---
|
||
** New command 'replace-buffer-contents'.
|
||
This command replaces the contents of the accessible portion of the
|
||
current buffer with the contents of the accessible portion of a
|
||
different buffer while keeping point, mark, markers, and text
|
||
properties as intact as possible.
|
||
|
||
+++
|
||
** New commands 'apropos-local-variable' and 'apropos-local-value'.
|
||
These are buffer-local versions of 'apropos-variable' and
|
||
'apropos-value', respectively. They show buffer-local variables whose
|
||
names and values, respectively, match a given pattern.
|
||
|
||
+++
|
||
** More user control of reordering bidirectional text for display.
|
||
The two new variables, 'bidi-paragraph-start-re' and
|
||
'bidi-paragraph-separate-re', allow customization of what exactly are
|
||
paragraphs, for the purposes of bidirectional display.
|
||
|
||
---
|
||
** 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).
|
||
|
||
|
||
* Changes in Specialized Modes and Packages in Emacs 26.1
|
||
|
||
---
|
||
** Emacs 26.1 comes with Org v9.1.4.
|
||
See the file ORG-NEWS for user-visible changes in Org.
|
||
|
||
---
|
||
** New function 'cl-generic-p'.
|
||
|
||
** Dired
|
||
|
||
+++
|
||
*** You can answer 'all' in 'dired-do-delete' to delete recursively all
|
||
remaining directories without more prompts.
|
||
|
||
+++
|
||
*** Dired supports wildcards in the directory part of the file names.
|
||
|
||
+++
|
||
*** You can now use '`?`' in 'dired-do-shell-command'.
|
||
It gets replaced by the current file name, like ' ? '.
|
||
|
||
+++
|
||
*** A new option 'dired-always-read-filesystem' defaulting to nil.
|
||
If non-nil, buffers visiting files are reverted before they are
|
||
searched; for instance, in 'dired-mark-files-containing-regexp' a
|
||
non-nil value of this option means the file is revisited in a
|
||
temporary buffer; this temporary buffer is the actual buffer searched:
|
||
the original buffer visiting the file is not modified.
|
||
|
||
---
|
||
*** Users can now customize mouse clicks in Dired in a more flexible way.
|
||
The new command 'dired-mouse-find-file' can be bound to a mouse click
|
||
and used to visit files/directories in Dired in the selected window.
|
||
The new command 'dired-mouse-find-file-other-frame' similarly visits
|
||
files/directories in another frame. You can write your own commands
|
||
that invoke 'dired-mouse-find-file' with non-default optional
|
||
arguments, to tailor the effects of mouse clicks on file names in
|
||
Dired buffers.
|
||
|
||
+++
|
||
*** In wdired, when editing files to contain slash characters,
|
||
the resulting directories are automatically created. Whether to do
|
||
this is controlled by the 'wdired-create-parent-directories' variable.
|
||
|
||
+++
|
||
*** 'W' is now bound to 'browse-url-of-dired-file', and is useful for
|
||
viewing HTML files and the like.
|
||
|
||
---
|
||
*** New variable 'dired-clean-confirm-killing-deleted-buffers'
|
||
controls whether Dired asks to kill buffers visiting deleted files and
|
||
directories. The default is t, so Dired asks for confirmation, to
|
||
keep previous behavior.
|
||
|
||
---
|
||
** html2text is now marked obsolete.
|
||
|
||
---
|
||
** smerge-refine-regions can refine regions in separate buffers.
|
||
|
||
---
|
||
** Info menu and index completion uses substring completion by default.
|
||
This can be customized via the 'info-menu' category in
|
||
'completion-category-overrides'.
|
||
|
||
+++
|
||
** The ancestor buffer is shown by default in 3-way merges.
|
||
A new option 'ediff-show-ancestor' and a new toggle
|
||
'ediff-toggle-show-ancestor'.
|
||
|
||
---
|
||
** TeX: Add luatex and xetex as alternatives to pdftex
|
||
|
||
** Electric-Buffer-menu
|
||
|
||
+++
|
||
*** Key 'U' is bound to 'Buffer-menu-unmark-all' and key 'M-DEL' is
|
||
bound to 'Buffer-menu-unmark-all-buffers'.
|
||
|
||
+++
|
||
** hideshow mode got four key bindings that are analogous to outline
|
||
mode bindings: 'C-c @ C-a', 'C-c @ C-t', 'C-c @ C-d', and 'C-c @ C-e'.
|
||
|
||
** bs
|
||
|
||
---
|
||
*** Two new commands 'bs-unmark-all', bound to 'U', and
|
||
'bs-unmark-previous', bound to <backspace>.
|
||
|
||
** Buffer-menu
|
||
|
||
+++
|
||
*** Two new commands 'Buffer-menu-unmark-all', bound to 'U' and
|
||
'Buffer-menu-unmark-all-buffers', bound to 'M-DEL'.
|
||
|
||
---
|
||
** Checkdoc
|
||
|
||
*** 'checkdoc-arguments-in-order-flag' now defaults to nil.
|
||
|
||
** Gnus
|
||
|
||
---
|
||
*** The ~/.newsrc file will now only be saved if the native select
|
||
method is an NNTP select method.
|
||
|
||
+++
|
||
*** A new command for sorting articles by readedness marks has been
|
||
added: 'C-c C-s C-m C-m'.
|
||
|
||
+++
|
||
*** In 'message-citation-line-format' the '%Z' format is now the time
|
||
zone name instead of the numeric form. The '%z' format continues to
|
||
be the numeric form. The new behavior is compatible with
|
||
'format-time-string'.
|
||
|
||
** Ibuffer
|
||
|
||
---
|
||
*** New command 'ibuffer-jump'.
|
||
|
||
---
|
||
*** New filter commands 'ibuffer-filter-by-basename',
|
||
'ibuffer-filter-by-file-extension', 'ibuffer-filter-by-directory',
|
||
'ibuffer-filter-by-starred-name', 'ibuffer-filter-by-modified'
|
||
and 'ibuffer-filter-by-visiting-file'; bound respectively
|
||
to '/b', '/.', '//', '/*', '/i' and '/v'.
|
||
|
||
---
|
||
*** Two new commands 'ibuffer-filter-chosen-by-completion'
|
||
and 'ibuffer-and-filter', the second bound to '/&'.
|
||
|
||
---
|
||
*** The commands 'ibuffer-pop-filter', 'ibuffer-pop-filter-group',
|
||
'ibuffer-or-filter' and 'ibuffer-filter-disable' have the alternative
|
||
bindings '/<up>', '/S-<up>', '/|' and '/DEL', respectively.
|
||
|
||
---
|
||
*** The data format specifying filters has been extended to allow
|
||
explicit logical 'and', and a more flexible form for logical 'not'.
|
||
See 'ibuffer-filtering-qualifiers' doc string for full details.
|
||
|
||
---
|
||
*** A new command 'ibuffer-copy-buffername-as-kill'; bound
|
||
to 'B'.
|
||
|
||
---
|
||
*** New command 'ibuffer-change-marks'; bound to '* c'.
|
||
|
||
---
|
||
*** A new command 'ibuffer-mark-by-locked' to mark
|
||
all locked buffers; bound to '% L'.
|
||
|
||
---
|
||
*** A new option 'ibuffer-locked-char' to indicate
|
||
locked buffers; Ibuffer shows a new column displaying
|
||
'ibuffer-locked-char' for locked buffers.
|
||
|
||
---
|
||
*** A new command 'ibuffer-unmark-all-marks' to unmark
|
||
all buffers without asking confirmation; bound to
|
||
'U'; 'ibuffer-do-replace-regexp' bound to 'r'.
|
||
|
||
---
|
||
*** A new command 'ibuffer-mark-by-content-regexp' to mark buffers
|
||
whose content matches a regexp; bound to '% g'.
|
||
|
||
---
|
||
*** Two new options 'ibuffer-never-search-content-name' and
|
||
'ibuffer-never-search-content-mode' used by
|
||
'ibuffer-mark-by-content-regexp'.
|
||
|
||
** Browse-URL
|
||
|
||
---
|
||
*** Support for opening links to man pages in Man or WoMan mode.
|
||
|
||
** Comint
|
||
|
||
---
|
||
*** New user option 'comint-move-point-for-matching-input' to control
|
||
where to place point after 'C-c M-r' and 'C-c M-s'.
|
||
|
||
** Compilation mode
|
||
|
||
---
|
||
*** Messages from CMake are now recognized.
|
||
|
||
+++
|
||
*** The number of errors, warnings, and informational messages is now
|
||
displayed in the mode line. These are updated as compilation
|
||
proceeds.
|
||
|
||
** Grep
|
||
|
||
---
|
||
*** Grep commands will now use GNU grep's '--null' option if
|
||
available, which allows distinguishing the filename from contents if
|
||
they contain colons. This can be controlled by the new custom option
|
||
'grep-use-null-filename-separator'.
|
||
|
||
---
|
||
*** The grep/rgrep/lgrep functions will now ask about saving files
|
||
before running. This is controlled by the 'grep-save-buffers'
|
||
variable.
|
||
|
||
** Edebug
|
||
|
||
---
|
||
*** Edebug can be prevented from pausing 1 second after reaching a
|
||
breakpoint (e.g. with "f" and "o") by customizing the new option
|
||
'edebug-sit-on-break'.
|
||
|
||
+++
|
||
*** New customizable option 'edebug-max-depth'.
|
||
This allows to enlarge the maximum recursion depth when instrumenting
|
||
code.
|
||
|
||
** Eshell
|
||
|
||
---
|
||
*** 'eshell-input-filter's value is now a named function
|
||
'eshell-input-filter-default', and has a new custom option
|
||
'eshell-input-filter-initial-space' to ignore adding commands prefixed
|
||
with blank space to eshell history.
|
||
|
||
** EUDC
|
||
|
||
---
|
||
*** Backward compatibility support for BBDB versions less than 3
|
||
(i.e., BBDB 2.x) is deprecated and will likely be removed in the next
|
||
major release of Emacs. Users of BBDB 2.x should plan to upgrade to
|
||
BBDB 3.x.
|
||
|
||
** eww
|
||
|
||
+++
|
||
*** New 'M-RET' command for opening a link at point in a new eww buffer.
|
||
|
||
+++
|
||
*** A new 's' command for switching to another eww buffer via the minibuffer.
|
||
|
||
---
|
||
*** The 'o' command ('shr-save-contents') has moved to 'O' to avoid collision
|
||
with the 'o' command from 'image-map'.
|
||
|
||
+++
|
||
*** A new command 'C' ('eww-toggle-colors') can be used to toggle
|
||
whether to use the HTML-specified colors or not. The user can also
|
||
customize the 'shr-use-colors' variable.
|
||
|
||
---
|
||
*** Images that are being loaded are now marked with gray
|
||
"placeholder" images of the size specified by the HTML. They are then
|
||
replaced by the real images asynchronously, which will also now
|
||
respect width/height HTML specs (unless they specify widths/heights
|
||
bigger than the current window).
|
||
|
||
---
|
||
*** The 'w' command on links is now 'shr-maybe-probe-and-copy-url'.
|
||
'shr-copy-url' now only copies the url at point; users who wish to
|
||
avoid accidentally accessing remote links may rebind 'w' and 'u' in
|
||
'eww-link-keymap' to it.
|
||
|
||
** Ido
|
||
|
||
---
|
||
*** The commands 'find-alternate-file-other-window',
|
||
'dired-other-window', 'dired-other-frame', and
|
||
'display-buffer-other-window' are now remapped to Ido equivalents if
|
||
Ido mode is active.
|
||
|
||
** Images
|
||
|
||
+++
|
||
*** Images are automatically scaled before displaying based on the
|
||
'image-scaling-factor' variable (if Emacs supports scaling the images
|
||
in question).
|
||
|
||
+++
|
||
*** It's now possible to specify aspect-ratio preserving combinations
|
||
of :width/:max-height and :height/:max-width keywords. In either
|
||
case, the "max" keywords win. (Previously some combinations would,
|
||
depending on the aspect ratio of the image, just be ignored and in
|
||
other instances this would lead to the aspect ratio not being
|
||
preserved.)
|
||
|
||
+++
|
||
*** Images inserted with 'insert-image' and related functions get a
|
||
keymap put into the text properties (or overlays) that span the
|
||
image. This keymap binds keystrokes for manipulating size and
|
||
rotation, as well as saving the image to a file. These commands are
|
||
also available in 'image-mode'.
|
||
|
||
+++
|
||
*** A new library for creating and manipulating SVG images has been
|
||
added. See the "(elisp) SVG Images" section in the ELisp reference
|
||
manual for details.
|
||
|
||
+++
|
||
*** New setf-able function to access and set image parameters is
|
||
provided: 'image-property'.
|
||
|
||
---
|
||
*** New commands 'image-scroll-left' and 'image-scroll-right'
|
||
for 'image-mode' that complement 'image-scroll-up' and
|
||
'image-scroll-down': they have the same prefix arg behavior and stop
|
||
at image boundaries.
|
||
|
||
** Image-Dired
|
||
|
||
---
|
||
*** Now provides a minor mode 'image-dired-minor-mode' which replaces
|
||
the function 'image-dired-setup-dired-keybindings'.
|
||
|
||
---
|
||
*** Thumbnail generation is now asynchronous.
|
||
The number of concurrent processes is limited by the variable
|
||
'image-dired-thumb-job-limit'.
|
||
|
||
---
|
||
*** 'image-dired-thumbnail-storage' has a new option 'standard-large'
|
||
for generating 256x256 thumbnails according to the Thumbnail Managing
|
||
Standard.
|
||
|
||
---
|
||
*** Inherits movement keys from 'image-mode' for viewing full images.
|
||
This includes the usual char, line, and page movement commands.
|
||
|
||
---
|
||
*** All the -options types have been changed to argument lists
|
||
instead of shell command strings. This change affects
|
||
'image-dired-cmd-create-thumbnail-options',
|
||
'image-dired-cmd-create-temp-image-options',
|
||
'image-dired-cmd-rotate-thumbnail-options',
|
||
'image-dired-cmd-rotate-original-options',
|
||
'image-dired-cmd-write-exif-data-options',
|
||
'image-dired-cmd-read-exif-data-options', and introduces
|
||
'image-dired-cmd-pngnq-options', 'image-dired-cmd-pngcrush-options',
|
||
'image-dired-cmd-create-standard-thumbnail-options'.
|
||
|
||
---
|
||
*** Recognizes more tools by default, including pngnq-s9 and OptiPNG.
|
||
|
||
---
|
||
*** 'find-file' and related commands now work on thumbnails and
|
||
displayed images, providing a default argument of the original file name
|
||
via an addition to 'file-name-at-point-functions'.
|
||
|
||
---
|
||
** The default 'Info-default-directory-list' no longer checks some obsolete
|
||
directory suffixes (gnu, gnu/lib, gnu/lib/emacs, emacs, lib, lib/emacs)
|
||
when searching for info directories.
|
||
|
||
+++
|
||
** The commands that add ChangeLog entries now prefer a VCS root directory
|
||
for the ChangeLog file, if none already exists. Customize
|
||
'change-log-directory-files' to nil for the old behavior.
|
||
|
||
---
|
||
** Support for non-string values of 'time-stamp-format' has been removed.
|
||
|
||
** Message
|
||
|
||
---
|
||
*** 'message-use-idna' now defaults to t (because Emacs comes with
|
||
built-in IDNA support now).
|
||
|
||
---
|
||
*** When sending HTML messages with embedded images, and you have
|
||
exiftool installed, and you rotate images with EXIF data (i.e.,
|
||
JPEGs), the rotational information will be inserted into the outgoing
|
||
image in the message. (The original image will not have its
|
||
orientation affected.)
|
||
|
||
---
|
||
*** The 'message-valid-fqdn-regexp' variable has been removed, since
|
||
there are now top-level domains added all the time. Message will no
|
||
longer warn about sending emails to top-level domains it hasn't heard
|
||
about.
|
||
|
||
---
|
||
*** 'message-beginning-of-line' (bound to 'C-a') understands folded headers.
|
||
In 'visual-line-mode' it will look for the true beginning of a header
|
||
while in non-'visual-line-mode' it will move the point to the indented
|
||
header's value.
|
||
|
||
** Package
|
||
|
||
+++
|
||
*** The new variable 'package-gnupghome-dir' has been added to control
|
||
where the GnuPG home directory (used for signature verification) is
|
||
located and whether GnuPG's option '--homedir' is used or not.
|
||
|
||
---
|
||
*** Deleting a package no longer respects 'delete-by-moving-to-trash'.
|
||
|
||
** Tramp
|
||
|
||
+++
|
||
*** The method part of remote file names is mandatory now.
|
||
A valid remote file name starts with "/method:host:" or
|
||
"/method:user@host:".
|
||
|
||
+++
|
||
*** The new pseudo method "-" is a marker for the default method.
|
||
"/-::" is the shortest remote file name then.
|
||
|
||
+++
|
||
*** The command 'tramp-change-syntax' allows to choose an alternative
|
||
remote file name syntax.
|
||
|
||
+++
|
||
*** New connection method "sg", which supports editing files under a
|
||
different group ID.
|
||
|
||
+++
|
||
*** New connection method "doas" for OpenBSD hosts.
|
||
|
||
+++
|
||
*** New connection method "gdrive", which allows to access Google
|
||
Drive onsite repositories.
|
||
|
||
+++
|
||
*** Gateway methods in Tramp have been removed.
|
||
Instead, the Tramp manual documents how to configure ssh and PuTTY
|
||
accordingly.
|
||
|
||
+++
|
||
*** Setting the "ENV" environment variable in
|
||
'tramp-remote-process-environment' enables reading of shell
|
||
initialization files.
|
||
|
||
---
|
||
*** Tramp is able now to send SIGINT to remote asynchronous processes.
|
||
|
||
---
|
||
*** Variable 'tramp-completion-mode' is obsoleted.
|
||
|
||
---
|
||
** 'auto-revert-use-notify' is set back to t in 'global-auto-revert-mode'.
|
||
|
||
** JS mode
|
||
|
||
---
|
||
*** JS mode now sets 'comment-multi-line' to t.
|
||
|
||
---
|
||
*** New variable 'js-indent-align-list-continuation', when set to nil,
|
||
will not align continuations of bracketed lists, but will indent them
|
||
by the fixed width 'js-indent-level'.
|
||
|
||
** CSS mode
|
||
|
||
---
|
||
*** Support for completing attribute values, at-rules, bang-rules,
|
||
HTML tags, classes and IDs using the 'completion-at-point' command.
|
||
Completion candidates for HTML classes and IDs are retrieved from open
|
||
HTML mode buffers.
|
||
|
||
---
|
||
*** CSS mode now binds 'C-h S' to a function that will show
|
||
information about a CSS construct (an at-rule, property, pseudo-class,
|
||
pseudo-element, with the default being guessed from context). By
|
||
default the information is looked up on the Mozilla Developer Network,
|
||
but this can be customized using 'css-lookup-url-format'.
|
||
|
||
---
|
||
*** CSS colors are fontified using the color they represent as the
|
||
background. For instance, #ff0000 would be fontified with a red
|
||
background.
|
||
|
||
+++
|
||
** Emacs now supports character name escape sequences in character and
|
||
string literals. The syntax variants '\N{character name}' and
|
||
'\N{U+code}' are supported.
|
||
|
||
+++
|
||
** Prog mode has some support for multi-mode indentation.
|
||
This allows better indentation support in modes that support multiple
|
||
programming languages in the same buffer, like literate programming
|
||
environments or ANTLR programs with embedded Python code.
|
||
|
||
A major mode can provide indentation context for a sub-mode through
|
||
the 'prog-indentation-context' variable. To support this, modes that
|
||
provide indentation should use 'prog-widen' instead of 'widen' and
|
||
'prog-first-column' instead of a literal zero. See the node
|
||
"(elisp) Mode-Specific Indent" in the ELisp manual for more details.
|
||
|
||
** ERC
|
||
|
||
---
|
||
*** New variable 'erc-default-port-tls' used to connect to TLS IRC
|
||
servers.
|
||
|
||
** URL
|
||
|
||
+++
|
||
*** The new function 'url-cookie-delete-cookie' can be used to
|
||
programmatically delete all cookies, or cookies from a specific
|
||
domain.
|
||
|
||
+++
|
||
*** 'url-retrieve-synchronously' now takes an optional timeout parameter.
|
||
|
||
---
|
||
*** The URL package now supports HTTPS over proxies supporting CONNECT.
|
||
|
||
+++
|
||
*** 'url-user-agent' now defaults to 'default', and the User-Agent
|
||
string is computed dynamically based on 'url-privacy-level'.
|
||
|
||
** VC and related modes
|
||
|
||
+++
|
||
*** 'vc-dir-mode' now binds 'vc-log-outgoing' to 'O'; and has various
|
||
branch-related commands on a keymap bound to 'B'.
|
||
|
||
+++
|
||
*** 'vc-region-history' is now bound to 'C-x v h', replacing the older
|
||
'vc-insert-headers' binding.
|
||
|
||
** CC mode
|
||
|
||
---
|
||
*** Opening a .h file will turn C or C++ mode depending on language used.
|
||
This is done with the help of the 'c-or-c++-mode' function, which
|
||
analyzes buffer contents to infer whether it's a C or C++ source file.
|
||
|
||
---
|
||
** New option 'cpp-message-min-time-interval' to allow user control
|
||
of progress messages in cpp.el.
|
||
|
||
---
|
||
** New DNS mode command 'dns-mode-ipv6-to-nibbles' to convert IPv6 addresses
|
||
to a format suitable for reverse lookup zone files.
|
||
|
||
** Ispell
|
||
|
||
+++
|
||
*** Enchant is now supported as a spell-checker.
|
||
|
||
Enchant is a meta-spell-checker that uses providers such as Hunspell
|
||
to do the actual checking. With it, users can use spell-checkers not
|
||
directly supported by Emacs, such as Voikko, Hspell and AppleSpell,
|
||
more easily share personal word-lists with other programs, and
|
||
configure different spelling-checkers for different languages.
|
||
(Version 2.1.0 or later of Enchant is required.)
|
||
|
||
** Flymake
|
||
|
||
+++
|
||
*** Flymake has been completely redesigned
|
||
|
||
Flymake now annotates arbitrary buffer regions, not just lines. It
|
||
supports arbitrary diagnostic types, not just errors and warnings (see
|
||
variable 'flymake-diagnostic-types-alist').
|
||
|
||
It also supports multiple simultaneous backends, meaning that you can
|
||
check your buffer from different perspectives (see variable
|
||
'flymake-diagnostic-functions'). Backends for Emacs Lisp mode are
|
||
provided.
|
||
|
||
The old Flymake behavior is preserved in the so-called "legacy
|
||
backend", which has been updated to benefit from the new UI features.
|
||
|
||
** Term
|
||
|
||
---
|
||
*** `term-char-mode' now makes its buffer read-only.
|
||
|
||
The buffer is made read-only to prevent changes from being made by
|
||
anything other than the process filter; and movements of point away
|
||
from the process mark are counter-acted so that the cursor is in the
|
||
correct position after each command. This is needed to avoid states
|
||
which are inconsistent with the state of the terminal understood by
|
||
the inferior process.
|
||
|
||
New user options `term-char-mode-buffer-read-only' and
|
||
`term-char-mode-point-at-process-mark' control these behaviors, and
|
||
are non-nil by default. Customize these options to nil if you want
|
||
the previous behavior.
|
||
|
||
** Xref
|
||
|
||
+++
|
||
*** When an *xref* buffer is needed, 'TAB' quits and jumps to an xref.
|
||
|
||
A new command 'xref-quit-and-goto-xref', bound to 'TAB' in *xref*
|
||
buffers, quits the window before jumping to the destination. In many
|
||
situations, the intended window configuration is restored, just as if
|
||
the *xref* buffer hadn't been necessary in the first place.
|
||
|
||
|
||
* New Modes and Packages in Emacs 26.1
|
||
|
||
---
|
||
** New Elisp data-structure library 'radix-tree'.
|
||
|
||
---
|
||
** New library 'xdg' with utilities for some XDG standards and specs.
|
||
|
||
** HTML
|
||
|
||
+++
|
||
*** A new submode of 'html-mode', 'mhtml-mode', is now the default
|
||
mode for *.html files. This mode handles indentation,
|
||
fontification, and commenting for embedded JavaScript and CSS.
|
||
|
||
---
|
||
** New mode 'conf-toml-mode' is a sub-mode of 'conf-mode', specialized
|
||
for editing TOML files.
|
||
|
||
---
|
||
** New mode 'conf-desktop-mode' is a sub-mode of 'conf-unix-mode',
|
||
specialized for editing freedesktop.org desktop entries.
|
||
|
||
---
|
||
** New minor mode 'pixel-scroll-mode' provides smooth pixel-level scrolling.
|
||
|
||
---
|
||
** New major mode 'less-css-mode' (a minor variant of 'css-mode') for
|
||
editing Less files.
|
||
|
||
|
||
* Incompatible Lisp Changes in Emacs 26.1
|
||
|
||
---
|
||
** 'password-data' is now a hash-table so that 'password-read' can use
|
||
any object for the 'key' argument.
|
||
|
||
+++
|
||
** Command 'dired-mark-extension' now automatically prepends a '.' to the
|
||
extension when not present. The new command 'dired-mark-suffix' behaves
|
||
similarly but it doesn't prepend a '.'.
|
||
|
||
+++
|
||
** Certain cond/pcase/cl-case forms are now compiled using a faster jump
|
||
table implementation. This uses a new bytecode op 'switch', which
|
||
isn't compatible with previous Emacs versions. This functionality can
|
||
be disabled by setting 'byte-compile-cond-use-jump-table' to nil.
|
||
|
||
+++
|
||
** If 'comment-auto-fill-only-comments' is non-nil, 'auto-fill-function'
|
||
is now called only if either no comment syntax is defined for the
|
||
current buffer or the self-insertion takes place within a comment.
|
||
|
||
---
|
||
** The alist 'ucs-names' is now a hash table.
|
||
|
||
---
|
||
** 'if-let' and 'when-let' are subsumed by 'if-let*' and 'when-let*'.
|
||
The incumbent 'if-let' and 'when-let' are now marked obsolete.
|
||
'if-let*' and 'when-let*' do not accept the single tuple special case.
|
||
New macro 'and-let*' is an implementation of the Scheme SRFI-2 syntax
|
||
of the same name. 'if-let*' and 'when-let*' now accept the same
|
||
binding syntax as 'and-let*'.
|
||
|
||
---
|
||
** 'C-up', 'C-down', 'C-left' and 'C-right' are now defined in term
|
||
mode to send the same escape sequences that xterm does. This makes
|
||
things like 'forward-word' in readline work.
|
||
|
||
---
|
||
** Customizable variable 'query-replace-from-to-separator'
|
||
now doesn't propertize the string value of the separator.
|
||
Instead, text properties are added by 'query-replace-read-from'.
|
||
Additionally, the new nil value restores pre-24.5 behavior
|
||
of not providing replacement pairs via the history.
|
||
|
||
---
|
||
** Some obsolete functions, variables, and faces have been removed:
|
||
|
||
*** 'make-variable-frame-local'. Variables cannot be frame-local any more.
|
||
|
||
*** From subr.el: 'window-dot', 'set-window-dot', 'read-input',
|
||
'show-buffer', 'eval-current-buffer', 'string-to-int'.
|
||
|
||
*** 'icomplete-prospects-length'.
|
||
|
||
*** All the default-FOO variables that hold the default value of the
|
||
FOO variable. Use 'default-value' and 'setq-default' to access and
|
||
change FOO, respectively. The exhaustive list of removed variables is:
|
||
'default-mode-line-format', 'default-header-line-format',
|
||
'default-line-spacing', 'default-abbrev-mode', 'default-ctl-arrow',
|
||
'default-truncate-lines', 'default-left-margin', 'default-tab-width',
|
||
'default-case-fold-search', 'default-left-margin-width',
|
||
'default-right-margin-width', 'default-left-fringe-width',
|
||
'default-right-fringe-width', 'default-fringes-outside-margins',
|
||
'default-scroll-bar-width', 'default-vertical-scroll-bar',
|
||
'default-indicate-empty-lines', 'default-indicate-buffer-boundaries',
|
||
'default-fringe-indicator-alist', 'default-fringe-cursor-alist',
|
||
'default-scroll-up-aggressively', 'default-scroll-down-aggressively',
|
||
'default-fill-column', 'default-cursor-type',
|
||
'default-cursor-in-non-selected-windows',
|
||
'default-buffer-file-coding-system', 'default-major-mode', and
|
||
'default-enable-multibyte-characters'.
|
||
|
||
*** Many variables obsoleted in 22.1 referring to face symbols.
|
||
|
||
+++
|
||
** The variable 'text-quoting-style' is now a customizable option. It
|
||
controls whether to and how to translate ASCII quotes in messages and
|
||
help output. Its possible values and their semantics remain unchanged
|
||
from Emacs 25. In particular, when this variable's value is 'grave',
|
||
all quotes in formats are output as-is.
|
||
|
||
---
|
||
** Functions like 'check-declare-file' and 'check-declare-directory'
|
||
now generate less chatter and more-compact diagnostics. The auxiliary
|
||
function 'check-declare-errmsg' has been removed.
|
||
|
||
+++
|
||
** The regular expression character class '[:blank:]' now matches
|
||
Unicode horizontal whitespace as defined in the Unicode Technical
|
||
Standard #18. If you only want to match space and tab, use '[ \t]'
|
||
instead.
|
||
|
||
+++
|
||
** 'min' and 'max' no longer round their results.
|
||
Formerly, they returned a floating-point value if any argument was
|
||
floating-point, which was sometimes numerically incorrect. For
|
||
example, on a 64-bit host (max 1e16 10000000000000001) now returns its
|
||
second argument instead of its first.
|
||
|
||
+++
|
||
** The variable 'old-style-backquotes' has been made internal and
|
||
renamed to 'lread--old-style-backquotes'. No user code should use
|
||
this variable.
|
||
|
||
---
|
||
** To avoid confusion caused by "smart quotes", the reader no longer
|
||
accepts Lisp symbols which begin with the following quotation
|
||
characters: ‘’‛“”‟〞＂＇, unless they are escaped with backslash.
|
||
|
||
+++
|
||
** 'default-file-name-coding-system' now defaults to a coding system
|
||
that does not process CRLF. For example, it defaults to 'utf-8-unix'
|
||
instead of to 'utf-8'. Before this change, Emacs would sometimes
|
||
mishandle file names containing these control characters.
|
||
|
||
+++
|
||
** 'file-attributes', 'file-symlink-p' and 'make-symbolic-link' no
|
||
longer quietly mutate the target of a local symbolic link, so that
|
||
Emacs can access and copy them reliably regardless of their contents.
|
||
The following changes are involved.
|
||
|
||
---
|
||
*** 'file-attributes' and 'file-symlink-p' no longer prepend "/:" to
|
||
symbolic links whose targets begin with "/" and contain ":". For
|
||
example, if a symbolic link "x" has a target "/y:z:", '(file-symlink-p
|
||
"x")' now returns "/y:z:" rather than "/:/y:z:".
|
||
|
||
---
|
||
*** 'make-symbolic-link' no longer looks for file name handlers of
|
||
target when creating a symbolic link. For example,
|
||
'(make-symbolic-link "/y:z:" "x")' now creates a symbolic link to
|
||
"/y:z:" instead of failing.
|
||
|
||
+++
|
||
*** 'make-symbolic-link' removes the remote part of a link target if
|
||
target and newname have the same remote part. For example,
|
||
'(make-symbolic-link "/x:y:a" "/x:y:b")' creates a link with the
|
||
literal string "a"; and '(make-symbolic-link "/x:y:a" "/x:z:b")'
|
||
creates a link with the literal string "/x:y:a" instead of failing.
|
||
|
||
+++
|
||
*** 'make-symbolic-link' now expands a link target with leading "~"
|
||
only when the optional third arg is an integer, as when invoked
|
||
interactively. For example, '(make-symbolic-link "~y" "x")' now
|
||
creates a link with target the literal string "~y"; to get the old
|
||
behavior, use '(make-symbolic-link (expand-file-name "~y") "x")'. To
|
||
avoid this expansion in interactive use, you can now prefix the link
|
||
target with "/:". For example, '(make-symbolic-link "/:~y" "x" 1)'
|
||
now creates a link to literal "~y".
|
||
|
||
+++
|
||
** 'file-truename' returns a quoted file name if the target of a
|
||
symbolic link has remote file name syntax.
|
||
|
||
+++
|
||
** Module functions are now implemented slightly differently; in
|
||
particular, the function 'internal--module-call' has been removed.
|
||
Code that depends on undocumented internals of the module system might
|
||
break.
|
||
|
||
---
|
||
** The argument LOCKNAME of 'write-region' is propagated to file name
|
||
handlers now.
|
||
|
||
---
|
||
** When built against recent versions of GTK+, Emacs always uses
|
||
gtk_window_move for moving frames and ignores the value of the
|
||
variable 'x-gtk-use-window-move'. The variable is now obsolete.
|
||
|
||
+++
|
||
** Several functions that create or rename files now treat their
|
||
destination argument specially only when it is a directory name, i.e.,
|
||
when it ends in '/' on GNU and other POSIX-like systems. When the
|
||
destination argument D of one of these functions is an existing
|
||
directory and the intent is to act on an entry in that directory, D
|
||
should now be a directory name. For example, (rename-file "e" "f/")
|
||
renames to 'f/e'. Although this formerly happened sometimes even when
|
||
D was not a directory name, as in (rename-file "e" "f") where 'f'
|
||
happened to be a directory, the old behavior often contradicted the
|
||
documentation and had inherent races that led to security holes. A
|
||
call like (rename-file C D) that used the old, undocumented behavior
|
||
can be written as (rename-file C (file-name-as-directory D)), a
|
||
formulation portable to both older and newer versions of Emacs.
|
||
Affected functions include 'add-name-to-file', 'copy-directory',
|
||
'copy-file', 'format-write-file', 'gnus-copy-file',
|
||
'make-symbolic-link', 'rename-file', 'thumbs-rename-images', and
|
||
'write-file'.
|
||
|
||
---
|
||
** The list returned by 'overlays-at' is now in decreasing priority order.
|
||
The documentation of this function always said the order should be
|
||
that of decreasing priority, if the 2nd argument of the function is
|
||
non-nil, but the code returned the list in the increasing order of
|
||
priority instead. Now the code does what the documentation says it
|
||
should do.
|
||
|
||
+++
|
||
** 'format' now avoids allocating a new string in more cases.
|
||
'format' was previously documented to return a newly-allocated string,
|
||
but this documentation was not correct, as (eq x (format x)) returned
|
||
t when x was the empty string. 'format' is no longer documented to
|
||
return a newly-allocated string, and the implementation now takes
|
||
advantage of the doc change to avoid making copies of strings in
|
||
common cases like (format "foo") and (format "%s" "foo").
|
||
|
||
---
|
||
** 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.
|
||
|
||
---
|
||
** Using '&rest' or '&optional' incorrectly is now an error.
|
||
For example giving '&optional' without a following variable, or
|
||
passing '&optional' multiple times:
|
||
|
||
(defun foo (&optional &rest x))
|
||
(defun bar (&optional &optional x))
|
||
|
||
Previously, Emacs would just ignore the extra keyword, or give
|
||
incorrect results in certain cases.
|
||
|
||
|
||
* Lisp Changes in Emacs 26.1
|
||
|
||
+++
|
||
** The function 'assoc' now takes an optional third argument TESTFN.
|
||
This argument, when non-nil, is used for comparison instead of
|
||
'equal'.
|
||
|
||
+++
|
||
** New optional argument TESTFN in 'alist-get', 'map-elt' and 'map-put'.
|
||
If non-nil, the argument specifies a function to use for comparison,
|
||
instead of, respectively, 'assq' and 'eql'.
|
||
|
||
+++
|
||
** New function 'seq-set-equal-p' to check if SEQUENCE1 and SEQUENCE2
|
||
contain the same elements, regardless of the order.
|
||
|
||
+++
|
||
** The new function 'mapbacktrace' applies a function to all frames of
|
||
the current stack trace.
|
||
|
||
+++
|
||
** The new function 'file-name-case-insensitive-p' tests whether a
|
||
given file is on a case-insensitive filesystem.
|
||
|
||
+++
|
||
** Several accessors for the value returned by 'file-attributes'
|
||
have been added. They are: 'file-attribute-type',
|
||
'file-attribute-link-number', 'file-attribute-user-id',
|
||
'file-attribute-group-id', 'file-attribute-access-time',
|
||
'file-attribute-modification-time',
|
||
'file-attribute-status-change-time', 'file-attribute-size',
|
||
'file-attribute-modes', 'file-attribute-inode-number',
|
||
'file-attribute-device-number' and 'file-attribute-collect'.
|
||
|
||
+++
|
||
** The new function 'buffer-hash' computes a fast, non-consing hash of
|
||
a buffer's contents.
|
||
|
||
+++
|
||
** 'interrupt-process' now consults the list 'interrupt-process-functions',
|
||
to determine which function has to be called in order to deliver the
|
||
SIGINT signal. This allows Tramp to send the SIGINT signal to remote
|
||
asynchronous processes. The hitherto existing implementation has been
|
||
moved to 'internal-default-interrupt-process'.
|
||
|
||
+++
|
||
** The new function 'read-multiple-choice' prompts for multiple-choice
|
||
questions, with a handy way to display help texts.
|
||
|
||
---
|
||
** 'comment-indent-function' values may now return a cons to specify a
|
||
range of indentation.
|
||
|
||
+++
|
||
** New optional argument TEXT in 'make-temp-file'.
|
||
|
||
---
|
||
** New function 'define-symbol-prop'.
|
||
|
||
+++
|
||
** New function 'secure-hash-algorithms' to list the algorithms that
|
||
'secure-hash' supports.
|
||
See the node "(elisp) Checksum/Hash" in the ELisp manual for details.
|
||
|
||
+++
|
||
** Emacs now exposes the GnuTLS cryptographic API with the functions
|
||
'gnutls-macs' and 'gnutls-hash-mac'; 'gnutls-digests' and
|
||
'gnutls-hash-digest'; 'gnutls-ciphers' and 'gnutls-symmetric-encrypt'
|
||
and 'gnutls-symmetric-decrypt'.
|
||
See the node "(elisp) GnuTLS Cryptography" in the ELisp manual for details.
|
||
|
||
+++
|
||
** The function 'gnutls-available-p' now returns a list of capabilities
|
||
supported by the GnuTLS library used by Emacs.
|
||
|
||
+++
|
||
** Emacs now supports records for user-defined types, via the new
|
||
functions 'make-record', 'record', and 'recordp'. Records are now
|
||
used internally to represent cl-defstruct and defclass instances, for
|
||
example.
|
||
|
||
+++
|
||
** 'save-some-buffers' now uses 'save-some-buffers-default-predicate'
|
||
to decide which buffers to ask about, if the PRED argument is nil.
|
||
The default value of 'save-some-buffers-default-predicate' is nil,
|
||
which means ask about all file-visiting buffers.
|
||
|
||
---
|
||
** string-(to|as|make)-(uni|multi)byte are now declared obsolete.
|
||
|
||
+++
|
||
** New variable 'while-no-input-ignore-events' which allow
|
||
setting which special events 'while-no-input' should ignore.
|
||
It is a list of symbols.
|
||
|
||
---
|
||
** New function 'undo-amalgamate-change-group' to get rid of
|
||
undo-boundaries between two states.
|
||
|
||
---
|
||
** New var 'definition-prefixes' is a hash table mapping prefixes to
|
||
the files where corresponding definitions can be found. This can be
|
||
used to fetch definitions that are not yet loaded, for example for
|
||
'C-h f'.
|
||
|
||
---
|
||
** New var 'syntax-ppss-table' to control the syntax-table used in
|
||
'syntax-ppss'.
|
||
|
||
+++
|
||
** 'define-derived-mode' can now specify an :after-hook form, which
|
||
gets evaluated after the new mode's hook has run. This can be used to
|
||
incorporate configuration changes made in the mode hook into the
|
||
mode's setup.
|
||
|
||
---
|
||
** Autoload files can be generated without timestamps,
|
||
by setting 'autoload-timestamps' to nil.
|
||
FIXME As an experiment, nil is the current default.
|
||
If no insurmountable problems before next release, it can stay that way.
|
||
|
||
---
|
||
** 'gnutls-boot' now takes a parameter ':complete-negotiation' that
|
||
says that negotiation should complete even on non-blocking sockets.
|
||
|
||
---
|
||
** There is now a new variable 'flyspell-sort-corrections-function'
|
||
that allows changing the way corrections are sorted.
|
||
|
||
---
|
||
** The new command 'fortune-message' has been added, which displays
|
||
fortunes in the echo area.
|
||
|
||
+++
|
||
** New function 'func-arity' returns information about the argument list
|
||
of an arbitrary function. This generalizes 'subr-arity' for functions
|
||
that are not built-in primitives. We recommend using this new
|
||
function instead of 'subr-arity'.
|
||
|
||
---
|
||
** New function 'region-bounds' can be used in the interactive spec
|
||
to provide region boundaries (for rectangular regions more than one)
|
||
to an interactively callable function as a single argument instead of
|
||
two separate arguments 'region-beginning' and 'region-end'.
|
||
|
||
+++
|
||
** 'parse-partial-sexp' state has a new element. Element 10 is
|
||
non-nil when the last character scanned might be the first character
|
||
of a two character construct, i.e., a comment delimiter or escaped
|
||
character. Its value is the syntax of that last character.
|
||
|
||
+++
|
||
** 'parse-partial-sexp's state, element 9, has now been confirmed as
|
||
permanent and documented, and may be used by Lisp programs. Its value
|
||
is a list of currently open parenthesis positions, starting with the
|
||
outermost parenthesis.
|
||
|
||
---
|
||
** 'read-color' will now display the color names using the color itself
|
||
as the background color.
|
||
|
||
---
|
||
** The function 'redirect-debugging-output' now works on platforms
|
||
other than GNU/Linux.
|
||
|
||
+++
|
||
** The new function 'string-version-lessp' compares strings by
|
||
interpreting consecutive runs of numerical characters as numbers, and
|
||
compares their numerical values. According to this predicate,
|
||
"foo2.png" is smaller than "foo12.png".
|
||
|
||
---
|
||
** Numeric comparisons and 'logb' no longer return incorrect answers
|
||
due to internal rounding errors. For example, '(< most-positive-fixnum
|
||
(+ 1.0 most-positive-fixnum))' now correctly returns t on 64-bit hosts.
|
||
|
||
---
|
||
** The functions 'ffloor', 'fceiling', 'ftruncate' and 'fround' now
|
||
accept only floating-point arguments, as per their documentation.
|
||
Formerly, they quietly accepted integer arguments and sometimes
|
||
returned nonsensical answers, e.g., '(< N (ffloor N))' could return t.
|
||
|
||
---
|
||
** On hosts like GNU/Linux x86-64 where a 'long double' fraction
|
||
contains at least EMACS_INT_WIDTH - 3 bits, 'format' no longer returns
|
||
incorrect answers due to internal rounding errors when formatting
|
||
Emacs integers with '%e', '%f', or '%g' conversions. For example, on
|
||
these hosts '(eql N (string-to-number (format "%.0f" N)))' now returns
|
||
t for all Emacs integers N.
|
||
|
||
---
|
||
** Calls that accept floating-point integers (for use on hosts with
|
||
limited integer range) now signal an error if arguments are not
|
||
integral. For example '(decode-char 'ascii 0.5)' now signals an error.
|
||
|
||
+++
|
||
** The new function 'char-from-name' converts a Unicode name string
|
||
to the corresponding character code.
|
||
|
||
+++
|
||
** New functions 'sxhash-eq' and 'sxhash-eql' return hash codes of a
|
||
Lisp object suitable for use with 'eq' and 'eql' correspondingly. If
|
||
two objects are 'eq' ('eql'), then the result of 'sxhash-eq'
|
||
('sxhash-eql') on them will be the same.
|
||
|
||
+++
|
||
** Function 'sxhash' has been renamed to 'sxhash-equal' for
|
||
consistency with the new functions. For compatibility, 'sxhash'
|
||
remains as an alias to 'sxhash-equal'.
|
||
|
||
+++
|
||
** 'make-hash-table' now defaults to a rehash threshold of 0.8125
|
||
instead of 0.8, to avoid rounding glitches.
|
||
|
||
+++
|
||
** New function 'add-variable-watcher' can be used to call a function
|
||
when a symbol's value is changed. This is used to implement the new
|
||
debugger command 'debug-on-variable-change'.
|
||
|
||
+++
|
||
** Time conversion functions that accept a time zone rule argument now
|
||
allow it to be OFFSET or a list (OFFSET ABBR), where the integer
|
||
OFFSET is a count of seconds east of Universal Time, and the string
|
||
ABBR is a time zone abbreviation. The affected functions are
|
||
'current-time-string', 'current-time-zone', 'decode-time',
|
||
'format-time-string', and 'set-time-zone-rule'.
|
||
|
||
+++
|
||
** 'format-time-string' now formats '%q' to the calendar quarter.
|
||
|
||
+++
|
||
** New built-in function 'mapcan'.
|
||
It avoids unnecessary consing (and garbage collection).
|
||
|
||
+++
|
||
** 'car' and 'cdr' compositions 'cXXXr' and 'cXXXXr' are now part of Elisp.
|
||
|
||
+++
|
||
** 'gensym' is now part of Elisp.
|
||
|
||
---
|
||
** Low-level list functions like 'length' and 'member' now do a better
|
||
job of signaling list cycles instead of looping indefinitely.
|
||
|
||
+++
|
||
** The new functions 'make-nearby-temp-file' and 'temporary-file-directory'
|
||
can be used for creation of temporary files on remote or mounted directories.
|
||
|
||
+++
|
||
** On GNU platforms when operating on a local file, 'file-attributes'
|
||
no longer suffers from a race when called while another process is
|
||
altering the filesystem. On non-GNU platforms 'file-attributes'
|
||
attempts to detect the race, and returns nil if it does so.
|
||
|
||
+++
|
||
** The new function 'file-local-name' can be used to specify arguments
|
||
of remote processes.
|
||
|
||
+++
|
||
** The new functions 'file-name-quote', 'file-name-unquote' and
|
||
'file-name-quoted-p' can be used to quote / unquote file names with
|
||
the prefix "/:".
|
||
|
||
+++
|
||
** The new error 'file-missing', a subcategory of 'file-error', is now
|
||
signaled instead of 'file-error' if a file operation acts on a file
|
||
that does not exist.
|
||
|
||
+++
|
||
** The function 'delete-directory' no longer signals an error when
|
||
operating recursively and when some other process deletes the directory
|
||
or its files before 'delete-directory' gets to them.
|
||
|
||
+++
|
||
** New error type 'user-search-failed' like 'search-failed' but
|
||
avoids debugger like 'user-error'.
|
||
|
||
+++
|
||
** The function 'line-number-at-pos' now takes a second optional
|
||
argument 'absolute'. If this parameter is nil, the default, this
|
||
function keeps on returning the line number taking potential narrowing
|
||
into account. If this parameter is non-nil, the function ignores
|
||
narrowing and returns the absolute line number.
|
||
|
||
---
|
||
** The function 'color-distance' now takes a second optional argument
|
||
'metric'. When non-nil, it should be a function of two arguments that
|
||
accepts two colors and returns a number.
|
||
|
||
** Changes in Frame and Window Handling
|
||
|
||
+++
|
||
*** Resizing a frame no longer runs 'window-configuration-change-hook'.
|
||
'window-size-change-functions' should be used instead.
|
||
|
||
+++
|
||
*** The new function 'frame-size-changed-p' can tell whether a frame has
|
||
been resized since the last time 'window-size-change-functions' has been
|
||
run.
|
||
|
||
+++
|
||
*** The function 'frame-geometry' now also returns the width of a
|
||
frame's outer border.
|
||
|
||
+++
|
||
*** New frame parameters and changed semantics for older ones:
|
||
|
||
+++
|
||
**** 'z-group' positions a frame above or below all others.
|
||
|
||
+++
|
||
**** 'min-width' and 'min-height' specify the absolute minimum size of a
|
||
frame.
|
||
|
||
+++
|
||
**** 'parent-frame' makes a frame the child frame of another Emacs
|
||
frame. The section "(elisp) Child Frames" in the ELisp manual
|
||
describes the intrinsics of that relationship.
|
||
|
||
+++
|
||
**** 'delete-before' triggers deletion of one frame before that of
|
||
another.
|
||
|
||
+++
|
||
**** 'mouse-wheel-frame' specifies another frame whose windows shall be
|
||
scrolled instead.
|
||
|
||
+++
|
||
**** 'no-other-frame' has 'next-frame' and 'previous-frame' skip this
|
||
frame.
|
||
|
||
+++
|
||
**** 'skip-taskbar' removes a frame's icon from the taskbar and has
|
||
'Alt-<TAB>' skip this frame.
|
||
|
||
+++
|
||
**** 'no-focus-on-map' avoids that a frame gets input focus when mapped.
|
||
|
||
+++
|
||
**** 'no-accept-focus' means that a frame does not want to get input
|
||
focus via the mouse.
|
||
|
||
+++
|
||
**** 'undecorated' removes the window manager decorations from a frame.
|
||
|
||
+++
|
||
**** 'override-redirect' tells the window manager to disregard this
|
||
frame.
|
||
|
||
+++
|
||
**** 'width' and 'height' allow to specify pixel values and ratios now.
|
||
|
||
+++
|
||
**** 'left' and 'top' allow to specify ratios now.
|
||
|
||
+++
|
||
**** 'keep-ratio' preserves size and position of child frames when their
|
||
parent frame is resized.
|
||
|
||
+++
|
||
**** 'no-special-glyphs' suppresses display of truncation and
|
||
continuation glyphs in a frame.
|
||
|
||
+++
|
||
**** 'auto-hide-function' and 'minibuffer-exit' handle auto hiding of
|
||
frames and exiting from minibuffer individually.
|
||
|
||
+++
|
||
**** 'fit-frame-to-buffer-margins' and 'fit-frame-to-buffer-sizes'
|
||
handle fitting a frame to its buffer individually.
|
||
|
||
+++
|
||
**** 'drag-internal-border', 'drag-with-header-line',
|
||
'drag-with-mode-line', 'snap-width', 'top-visible' and 'bottom-visible'
|
||
allow to drag and resize frames with the mouse.
|
||
|
||
+++
|
||
**** 'minibuffer' is now set to the default minibuffer window when
|
||
initially specified as nil and is not reset to nil when initially
|
||
specifying a minibuffer window.
|
||
|
||
*** The new function 'frame-list-z-order' returns a list of all frames
|
||
in Z (stacking) order.
|
||
|
||
+++
|
||
*** The function 'x-focus-frame' optionally tries to not activate its
|
||
frame.
|
||
|
||
+++
|
||
*** The variable 'focus-follows-mouse' has a third meaningful value
|
||
'auto-raise' to indicate that the window manager automatically raises a
|
||
frame when the mouse pointer enters it.
|
||
|
||
+++
|
||
*** The new function 'frame-restack' puts a frame above or below
|
||
another on the display.
|
||
|
||
+++
|
||
*** The new face 'internal-border' specifies the background of a frame's
|
||
internal border.
|
||
|
||
+++
|
||
*** The NORECORD argument of 'select-window' now has a meaningful value
|
||
'mark-for-redisplay' which is like any other non-nil value but marks
|
||
WINDOW for redisplay.
|
||
|
||
+++
|
||
*** Support for side windows is now official. The display action
|
||
function 'display-buffer-in-side-window' will display its buffer in a
|
||
side window. Functions for toggling all side windows on a frame,
|
||
changing and reversing the layout of side windows and returning the
|
||
main (major non-side) window of a frame are provided. For details
|
||
consult the section "(elisp) Side Windows" in the ELisp manual.
|
||
|
||
+++
|
||
*** Support for atomic windows - rectangular compositions of windows
|
||
treated by 'split-window', 'delete-window' and 'delete-other-windows'
|
||
like a single live window - is now official. For details consult the
|
||
section "(elisp) Atomic Windows" in the ELisp manual.
|
||
|
||
+++
|
||
*** New 'display-buffer' alist entry 'window-parameters' allows to
|
||
assign window parameters to the window used for displaying the buffer.
|
||
|
||
+++
|
||
*** New function 'display-buffer-reuse-mode-window' is an action function
|
||
suitable for use in 'display-buffer-alist'. For example, to avoid
|
||
creating a new window when opening man pages when there's already one,
|
||
use
|
||
|
||
(add-to-list 'display-buffer-alist
|
||
'("\\`\\*Man .*\\*\\'" .
|
||
(display-buffer-reuse-mode-window
|
||
(inhibit-same-window . nil)
|
||
(mode . Man-mode))))
|
||
|
||
+++
|
||
*** New window parameter 'no-delete-other-windows' prevents that
|
||
its window gets deleted by 'delete-other-windows'.
|
||
|
||
+++
|
||
*** New window parameters 'mode-line-format' and 'header-line-format'
|
||
allow to override the buffer-local formats for this window.
|
||
|
||
+++
|
||
*** New command 'window-swap-states' swaps the states of two live
|
||
windows.
|
||
|
||
+++
|
||
*** New functions 'window-pixel-width-before-size-change' and
|
||
'window-pixel-height-before-size-change' support detecting which
|
||
window changed size when 'window-size-change-functions' are run.
|
||
|
||
+++
|
||
*** The new function 'window-lines-pixel-dimensions' returns the pixel
|
||
dimensions of a window's text lines.
|
||
|
||
+++
|
||
*** The new function 'window-largest-empty-rectangle' returns the
|
||
dimensions of the largest rectangular area not occupying any text in a
|
||
window's body.
|
||
|
||
+++
|
||
*** The semantics of 'mouse-autoselect-window' has changed slightly.
|
||
For details see the section "(elisp) Mouse Window Auto-selection" in
|
||
the ELisp manual.
|
||
|
||
---
|
||
*** 'select-frame-by-name' now may return a frame on another display
|
||
if it does not find a suitable one on the current display.
|
||
|
||
---
|
||
** 'tcl-auto-fill-mode' is now declared obsolete. Its functionality
|
||
can be replicated simply by setting 'comment-auto-fill-only-comments'.
|
||
|
||
** New pcase pattern 'rx' to match against an rx-style regular expression.
|
||
For details, see the doc string of 'rx--pcase-macroexpander'.
|
||
|
||
---
|
||
** New functions to set region from secondary selection and vice versa.
|
||
The new functions 'secondary-selection-to-region' and
|
||
'secondary-selection-from-region' let you set the beginning and the
|
||
end of the region from those of the secondary selection and vice
|
||
versa.
|
||
|
||
** New function 'lgstring-remove-glyph' can be used to modify a
|
||
gstring returned by the underlying layout engine (e.g. m17n-flt,
|
||
uniscribe).
|
||
|
||
|
||
* Changes in Emacs 26.1 on Non-Free Operating Systems
|
||
|
||
+++
|
||
** Intercepting hotkeys on Windows 7 and later now works better.
|
||
The new keyboard hooking code properly grabs system hotkeys such as
|
||
'Win-*' and 'Alt-TAB', in a way that Emacs can get at them before the
|
||
system. This makes the 'w32-register-hot-key' functionality work
|
||
again on all versions of MS-Windows starting with Windows 7. On
|
||
Windows NT and later you can now register any hotkey combination. (On
|
||
Windows 9X, the previous limitations, spelled out in the Emacs manual,
|
||
still apply.)
|
||
|
||
---
|
||
** 'convert-standard-filename' no longer mirrors slashes on MS-Windows.
|
||
Previously, on MS-Windows this function converted slash characters in
|
||
file names into backslashes. It no longer does that. If your Lisp
|
||
program used 'convert-standard-filename' to prepare file names to be
|
||
passed to subprocesses (which is not the recommended usage of that
|
||
function), you will now have to mirror slashes in your application
|
||
code. One possible way is this:
|
||
|
||
(let ((start 0))
|
||
(while (string-match "/" file-name start)
|
||
(aset file-name (match-beginning 0) ?\\)
|
||
(setq start (match-end 0))))
|
||
|
||
---
|
||
** GUI sessions on MS-Windows now treat SIGINT like Posix platforms do.
|
||
The effect of delivering a Ctrl-C (SIGINT) signal to a GUI Emacs on
|
||
MS-Windows is now the same as on Posix platforms -- Emacs saves the
|
||
session and exits. In particular, this will happen if you start
|
||
emacs.exe from the Windows shell, then type Ctrl-C into that shell's
|
||
window.
|
||
|
||
---
|
||
** 'signal-process' supports SIGTRAP on Windows XP and later.
|
||
The 'kill' emulation on Windows now maps SIGTRAP to a call to the
|
||
'DebugBreakProcess' API. This causes the receiving process to break
|
||
execution and return control to the debugger. If no debugger is
|
||
attached to the receiving process, the call is typically ignored.
|
||
This is in contrast to the default action on POSIX Systems, where it
|
||
causes the receiving process to terminate with a core dump if no
|
||
debugger has been attached to it.
|
||
|
||
---
|
||
** 'set-mouse-position' and 'set-mouse-absolute-pixel-position' work
|
||
on macOS.
|
||
|
||
---
|
||
** Emacs can now be run as a GUI application from the command line on
|
||
macOS.
|
||
|
||
+++
|
||
** 'ns-appearance' and 'ns-transparent-titlebar' change the appearance
|
||
of frame decorations on macOS 10.9+.
|
||
|
||
---
|
||
** 'ns-use-thin-smoothing' enables thin font smoothing on macOS 10.8+.
|
||
|
||
---
|
||
** 'process-attributes' on Darwin systems now returns more information.
|
||
|
||
---
|
||
** Mousewheel and trackpad scrolling on macOS 10.7+ now behaves more
|
||
like the macOS default. The new variables 'ns-mwheel-line-height',
|
||
'ns-use-mwheel-acceleration' and 'ns-use-mwheel-momentum' can be used
|
||
to customize the behavior.
|
||
|
||
|
||
----------------------------------------------------------------------
|
||
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:
|