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1826 lines
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1826 lines
75 KiB
Plaintext
GNU Emacs NEWS -- history of user-visible changes.
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Copyright (C) 2014-2019 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 25.
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See file HISTORY for a list of GNU Emacs versions and release dates.
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See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
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and NEWS.1-17 for changes in older Emacs versions.
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You can narrow news to a specific version by calling 'view-emacs-news'
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with a prefix argument or by typing C-u C-h C-n.
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* Changes in Emacs 25.3
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This is an emergency release to fix a security vulnerability in Emacs.
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** Security vulnerability related to Enriched Text mode is removed.
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*** Enriched Text mode has its support for decoding 'x-display' disabled.
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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 instantiating the property, so decoding 'x-display' is
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vulnerable to executing arbitrary malicious Lisp code included in the
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text (e.g., sent as part of an email message).
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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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*** Gnus no longer supports "richtext" and "enriched" inline MIME objects.
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This support was disabled to avoid evaluation of arbitrary Lisp code
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contained in email messages and news articles.
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* Changes in Emacs 25.2
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This is mainly a bug-fix release, but there are some other changes.
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** 'find-library', 'help-function-def' and 'help-variable-def' now run
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'find-function-after-hook'.
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** New basic face 'fixed-pitch-serif', for a fixed-width font with serifs.
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The 'Info-quoted' and 'tex-verbatim' faces inherit from it by default.
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** New variable 'use-default-font-for-symbols', for backward compatibility.
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This variable allows you to get back pre-Emacs 25 behavior where the
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font for displaying symbol and punctuation characters was always
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selected according to your fontset setup. By default, Emacs 25 tries
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to use the default face's font for such characters, if it supports
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them, disregarding the fontsets. Set this variable to nil to disable
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this and get back the old behavior.
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** 'electric-quote-mode' is no longer suppressed in a buffer whose
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coding system cannot represent curved quote characters.
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Instead, users can deal with the unrepresentable characters in the
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usual way when they save the buffer.
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** New variable 'inhibit-compacting-font-caches'.
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Set this variable to a non-nil value to speed up display of characters
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using large fonts, at the price of a larger memory footprint.
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** The version number of CC Mode has been changed from 5.33 to
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5.32.99, although the software itself hasn't changed. This aims to
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reduce confusion with the standalone CC Mode 5.33 (available from
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http://cc-mode.sourceforge.net), which is a more mature version than
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the one included in Emacs 25.2.
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* Installation Changes in Emacs 25.1
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** Building Emacs now requires C99 or later.
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** Building Emacs now requires GNU make, version 3.81 or later.
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** New configure option --with-cairo.
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This builds Emacs with Cairo drawing. As a side effect, it provides
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support for built-in printing, when Emacs was built with GTK+.
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The Emacs Cairo drawing is experimental and still has some known
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display problems. We encourage more testing of this build and
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reporting any problems you find, but it is not recommended for
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production.
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** New configure option --with-modules.
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This enables support for loading dynamic modules; see below.
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** By default, Emacs no longer works on IRIX. We expect that Emacs
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users are not affected by this, as SGI stopped supporting IRIX in
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December 2013. If you are affected, please send a bug report. You
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should be able to work around the problem either by porting the Emacs
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undumping code to GCC under IRIX, or by configuring --with-wide-int,
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or by sticking with Emacs 24.4.
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** The Emacs garbage collector assumes GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS.
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The GC_MAKE_GCPROS_NOOPS stack-marking variant has been the default
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since Emacs 24.4, and the other variants were undocumented and were
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obstacles to maintenance and development. GC_MARK_STACK and its
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related symbols have been removed from the C internals.
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** 'configure' now prefers gnustep-config when configuring GNUstep.
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If gnustep-config is not available, the old heuristics are used.
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** 'configure' now prefers inotify to gfile for file notification,
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unless gfile is explicitly requested via --with-file-notification='gfile'.
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** 'configure' detects the kqueue file notification library on *BSD
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and macOS machines.
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** The configure option '--with-pkg-config-prog' has been removed.
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Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
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** The configure option '--with-mmdf' has been removed.
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It was no longer useful, as it relied on libraries that are no longer
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supported, and its presence led to confusion during configuration.
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This affects only the 'movemail' utility; Emacs itself can still
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process MMDF-format files as before.
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** The configure option '--enable-silent-rules' is now the default,
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and silent rules are now quieter. To get the old behavior where
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'make' chatters a lot, configure with '--disable-silent-rules' or
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build with 'make V=1'.
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** The configure option '--with-gameuser' now allows you to specify a
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group instead of a user if its argument is prefixed by ':' (a colon).
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This will cause the game score files in "${localstatedir}/games/emacs"
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to be owned by that group, and the helper program for updating them to
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be installed setgid. The option now defaults to the 'games' group.
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** The 'grep-changelog' script (and its manual page) are no longer included.
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It has no particular connection to Emacs and has not changed in years,
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so if you want to use it, you can always take a copy from an older Emacs.
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** Emacs 25 comes with a new set of icons.
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Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
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The old Emacs logo icons are available as 'emacs23.png' in the same location.
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** New make target 'check-expensive' to run additional tests.
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This includes all tests which run via "make check", plus additional
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tests which take more time to perform.
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* Startup Changes in Emacs 25.1
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** When Emacs is given a file as a command line argument and
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'initial-buffer-choice' is non-nil, display both the file and
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'initial-buffer-choice'. When Emacs is given more than one file and
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'initial-buffer-choice' is non-nil, show 'initial-buffer-choice'
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and '*Buffer List*'. This makes Emacs convenient to use from the
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command line when 'initial-buffer-choice' is non-nil.
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** The value of 'initial-scratch-message' is now treated as a doc string
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and can contain escape sequences for command keys, quotes, and the like.
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** The default height of GUI frames was enlarged.
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This is so there's enough space in the initial window to display the
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optional text about recovering crashes sessions, without losing the
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splash image display.
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* Changes in Emacs 25.1
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** Xwidgets: a new feature for embedding native widgets inside Emacs buffers.
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If you have gtk3 and webkitgtk3 installed, and Emacs was built with
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xwidget support, you can access the embedded webkit browser with 'M-x
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xwidget-webkit-browse-url'. This opens a new buffer with the embedded
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browser. The buffer will have a new mode, 'xwidget-webkit-mode'
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(similar to 'image-mode'), which supports the webkit widget.
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*** New functions for xwidget-webkit mode 'xwidget-webkit-insert-string',
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'xwidget-webkit-adjust-size-dispatch', 'xwidget-webkit-back',
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'xwidget-webkit-browse-url', 'xwidget-webkit-reload',
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'xwidget-webkit-current-url', 'xwidget-webkit-scroll-backward',
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'xwidget-webkit-scroll-forward', 'xwidget-webkit-scroll-down',
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'xwidget-webkit-scroll-up'.
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** Emacs can now load shared/dynamic libraries (modules).
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A dynamic Emacs module is a shared library that provides additional
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functionality for use in Emacs Lisp programs, just like a package
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written in Emacs Lisp would. The functions 'load', 'require',
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'load-file', etc. were extended to load such modules, as they do with
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Emacs Lisp packages. The new variable 'module-file-suffix' holds the
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system-dependent value of the file-name extension ('.so' on Posix
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hosts) of the module files.
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A module should export a C-callable function named
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'emacs_module_init', which Emacs will call as part of the call to
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'load' or 'require' which loads the module. It should also export a
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symbol named 'plugin_is_GPL_compatible' to indicate that its code is
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released under the GPL or compatible license; Emacs will refuse to
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load modules that don't export such a symbol.
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If a module needs to call Emacs functions, it should do so through the
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API defined and documented in the header file 'emacs-module.h'. Note
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that any module that provides Lisp-callable functions will have to use
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Emacs functions such as 'fset' and 'funcall', in order to register its
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functions with the Emacs Lisp interpreter.
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Modules can create 'user-ptr' Lisp objects that embed pointers to C
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structs defined by the module. This is useful for keeping around
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complex data structures created by a module, to be passed back to the
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module's functions. User-ptr objects can also have associated
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"finalizers" -- functions to be run when the object is GC'ed; this is
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useful for freeing any resources allocated for the underlying data
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structure, such as memory, open file descriptors, etc. A new
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predicate 'user-ptrp' returns non-nil if its argument is a 'user-ptr'
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object.
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Loadable modules in Emacs are an experimental feature, and subject to
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change in future releases. For that reason, their support is disabled
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by default, and must be enabled by using the '--with-modules' option
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at configure time.
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** Network security (TLS/SSL certificate validity and the like) is
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added via the new Network Security Manager (NSM) and controlled via
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the 'network-security-level' variable.
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** 'C-h l' now also lists the commands that were run.
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** 'x-select-enable-clipboard' is renamed 'select-enable-clipboard'
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and 'x-select-enable-primary' is renamed 'select-enable-primary'.
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Additionally they both now apply to all systems (macOS, GNUstep,
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MS-Windows, you name it), with the proviso that on some systems (e.g.,
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MS-Windows) 'select-enable-primary' is ineffective since the system
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doesn't have the equivalent of a primary selection.
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** New option 'switch-to-buffer-in-dedicated-window' allows you to
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customize how 'switch-to-buffer' proceeds interactively when the
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selected window is strongly dedicated to its buffer.
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** The option 'even-window-heights' has been renamed to
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'even-window-sizes' and now handles window widths as well.
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** 'terpri' gets an optional arg ENSURE to conditionally output a newline.
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** 'insert-register' now leaves point after the inserted text
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when called interactively. A prefix argument toggles this behavior.
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** The new variable 'term-file-aliases' replaces some files from lisp/term.
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The function 'tty-run-terminal-initialization' consults this variable
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when deciding what terminal-specific initialization code to run.
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** New variable 'system-configuration-features', listing some of the
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main features that Emacs was compiled with. This is mainly intended
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for use in Emacs bug reports.
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** A password is now hidden also when typed in batch mode. Another
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hiding character but the default '.' can be used by let-binding the
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variable 'read-hide-char'.
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** The Emacs pseudo-random number generator can be securely seeded.
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On systems where Emacs can access the system entropy or some other
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cryptographically secure random stream, it now uses that when 'random'
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is called with its argument t. This allows cryptographically strong
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random values; in particular, the Emacs server now uses this facility
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to produce its authentication key.
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** New input methods: 'tamil-dvorak', 'programmer-dvorak' and 'probhat'.
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* Editing Changes in Emacs 25.1
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** 'M-x' suggests shorthands and ignores obsolete commands for completion.
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** Changes in undo
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*** Successive single-char deletions are collapsed in the undo-log just like
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successive char insertions. Which commands invoke this behavior is
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controlled by the new 'undo-auto-amalgamate' function. See the node
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"Undo" in the ELisp manual for more details.
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*** The heuristic used to insert 'undo-boundary' after each command
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has changed, so that if a command causes changes in more than just the
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current buffer, Emacs now calls 'undo-boundary' in every buffer
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affected by the command.
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** New command 'comment-line' bound to 'C-x C-;'.
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** New and improved facilities for inserting Unicode characters
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*** Unicode names entered via 'C-x 8 RET' now use substring completion
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by default.
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*** 'C-x 8' now has shorthands for several chars, such as U+2010
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(HYPHEN), U+2011 (NON-BREAKING HYPHEN), and U+2012 (FIGURE DASH). As
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before, you can type 'C-x 8 C-h' to list shorthands.
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*** New minor mode 'electric-quote-mode' for using curved quotes as you
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type. See also the new variable 'text-quoting-style'.
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** New minor mode 'global-eldoc-mode' is enabled by default.
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** Emacs now uses "bracketed paste mode" on text terminals that support it.
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Bracketed paste mode causes text terminals to wrap pasted text in special
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escape sequences that allow Emacs to tell the difference between text
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you type and text you paste from other applications. Emacs then
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avoids interpreting each character in the pasted text as it does with
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keyboard input, which results in a paste experience similar to that
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under a window system, and significant performance improvements when
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pasting large amounts of text.
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Bracketed paste mode is disabled by default, so Emacs automatically
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enables it at startup if the terminal supports it.
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** Emacs now supports the latest version of the UBA.
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The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
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was updated to support all the latest additions and changes introduced
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in Unicode Standard versions 6.3, 7.0, and the latest Unicode 8.0.
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This includes full support for directional isolates and the
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Bidirectional Parentheses Algorithm (BPA) specified by these Unicode
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standards.
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** You can access 'mouse-buffer-menu' ('C-down-mouse-1') using 'C-f10'.
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** New buffer-local 'electric-pair-local-mode'.
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** New variable 'fast-but-imprecise-scrolling' inhibits
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fontification during full screen scrolling operations, giving less
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hesitant operation during auto-repeat of 'C-v', 'M-v' at the cost of
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possible inaccuracies in the end position.
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** New documentation command 'describe-symbol'.
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Works for functions, variables, faces, etc. It is bound to 'C-h o' by
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default.
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** New function 'custom-prompt-customize-unsaved-options' checks for
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unsaved customizations and prompts user to customize (if found). It
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is intended for adding to 'kill-emacs-query-functions'.
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** The old 'C-x w' bindings in 'hi-lock-mode' are officially deprecated
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in favor of the global 'M-s h' bindings introduced in Emacs 23.1.
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They'll disappear soon.
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* Changes in Specialized Modes and Packages in Emacs 25.1
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** Checkdoc
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*** New command 'checkdoc-package-keywords' checks if the
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current package keywords are recognized. Set the new option
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'checkdoc-package-keywords-flag' to non-nil to make
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'checkdoc-current-buffer' call this function automatically.
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*** New function 'checkdoc-file' checks for style errors.
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It's meant for use together with 'compile':
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emacs -batch --eval "(checkdoc-file \"subr.el\")"
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** Desktop
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*** The desktop format version has been upgraded from 206 to 208.
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Although Emacs 25.1 can read a version 206 desktop, earlier Emacsen
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cannot read a version 208 desktop. To upgrade your desktop file, you
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must explicitly request the upgrade, by 'C-u M-x desktop-save'. You are
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recommended to do this as soon as you have firmly upgraded to Emacs
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25.1 (or later). Should you ever need to downgrade your desktop file
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to version 206, you can do this with 'C-u C-u M-x desktop-save'.
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*** 'desktop-restore-in-current-display' now defaults to t, not nil.
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That is, Emacs by default now restores frames into the current display.
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** New function 'bookmark-set-no-overwrite' bound to 'C-x r M'.
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It raises an error if a bookmark of that name already exists,
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unlike 'bookmark-set' which silently updates an existing bookmark.
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** Gnus
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*** New user options 'mm-html-inhibit-images' and 'mm-html-blocked-images'
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now control how mm-* functions fetch and display images in an HTML
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message. Gnus still uses 'gnus-inhibit-images' and 'gnus-blocked-images'
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for that purpose, i.e., binds mm-html- variables with those gnus-
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variables, but other packages do not have to bind gnus- variables now.
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*** 'mm-inline-text-html-with-images' has been removed.
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Use 'mm-html-inhibit-images' instead. Note that the value is opposite
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in meaning.
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** IMAP
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*** 'imap-ssl-program' has been removed, and imap.el uses the internal
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GnuTLS encryption functions if possible.
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** JSON
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||
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*** 'json-encode-string' now only escapes the characters it has to.
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Which means that the encoded strings can contain non-ASCII characters.
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||
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||
*** 'json-pretty-print' and 'json-pretty-print-buffer' now maintain
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the ordering of object keys by default.
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||
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||
*** New commands 'json-pretty-print-ordered' and
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||
'json-pretty-print-buffer-ordered' pretty prints JSON objects with
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object keys sorted alphabetically.
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||
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** Prettify Symbols mode
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*** Prettify Symbols mode supports custom composition predicates. By
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overriding the default 'prettify-symbols-compose-predicate', modes can
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specify in which contexts a symbol may be displayed as some Unicode
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character. 'prettify-symbols-default-compose-p' is the default which
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is suitable for most programming languages such as C or Lisp (but not
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(La)TeX).
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*** Symbols can be unprettified while point is inside them.
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New variable 'prettify-symbols-unprettify-at-point' configures this.
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** Enhanced xterm support
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||
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*** The new variable 'xterm-screen-extra-capabilities' for configuring xterm.
|
||
This variable tells Emacs which advanced capabilities are available in
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||
the xterm terminal emulator used to display Emacs text-mode frames.
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The default is to check each capability, and use it if available.
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(This variable was introduced in Emacs 24.1, but was not announced in
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its NEWS.)
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*** Killing text now also sets the CLIPBOARD/PRIMARY selection
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in the surrounding GUI (using the OSC-52 escape sequence). This only works
|
||
if your xterm supports it and enables the 'allowWindowOps' options (disabled
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||
by default at least in Debian, for security reasons).
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Similarly, you can yank the CLIPBOARD/PRIMARY selection (using the OSC-52
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escape sequence) if your xterm has the feature enabled but for that you
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||
additionally need to add 'getSelection' to 'xterm-extra-capabilities'.
|
||
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||
*** 'xterm-mouse-mode' now supports mouse-tracking (if your xterm supports it).
|
||
|
||
** The way to turn on and off 'save-place' mode has changed.
|
||
It is no longer sufficient to load the saveplace library and set
|
||
'save-place' non-nil. Instead, use the two new minor modes:
|
||
'save-place-mode' turns on saving last place in every file, and
|
||
'save-place-local-mode' does that only for the file in whose buffer it
|
||
is invoked. The 'save-place' variable is now an obsolete alias for
|
||
'save-place-mode', which replaces it, and 'toggle-save-place' is an
|
||
obsolete alias for the new 'save-place-local-mode' command.
|
||
|
||
** ERC
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||
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||
*** ERC can now hide message types by network or channel.
|
||
'erc-hide-list' will hide all messages of the specified type, while
|
||
'erc-network-hide-list' and 'erc-channel-hide-list' will only hide the
|
||
specified message types for the respective specified targets.
|
||
|
||
*** Reconnection is now asynchronous.
|
||
|
||
*** Nick completion is now case-insensitive again after inadvertently
|
||
being made case-sensitive in Emacs 24.2.
|
||
|
||
** MPC
|
||
|
||
*** New commands, key binds, and menu items.
|
||
|
||
**** '<' and '>' for navigating previous and next tracks in playlist
|
||
|
||
**** New play/pause command 'mpc-toggle-play' bound to 's'
|
||
|
||
**** 'g' bound to new command 'mpc-seek-current' will navigate current
|
||
track.
|
||
|
||
**** New commands 'mpc-toggle-{consume,repeat,single,shuffle}' for
|
||
toggling playback modes.
|
||
|
||
*** Now supports connecting to a UNIX domain socket.
|
||
|
||
*** Looks at more image file names to use as album art.
|
||
Case-insensitively tries for .folder.png (freedesktop) and folder.jpg
|
||
(XP) in addition to cover.jpg.
|
||
|
||
*** Searches in more locations for MPD configuration files.
|
||
MPD supports the XDG base directory specification since version 0.17.6.
|
||
|
||
** Midnight-mode
|
||
|
||
*** 'midnight-mode' is now a proper minor mode.
|
||
|
||
*** clean-buffer-*-regexps can now specify buffers via predicate functions.
|
||
|
||
** package.el
|
||
|
||
*** New "external" package status.
|
||
An external package is any installed package that's not built-in and
|
||
not from 'package-user-dir', which usually means it's from an entry in
|
||
'package-directory-list'. They are treated much like built-in
|
||
packages, in that they cannot be deleted through the package menu and
|
||
are not considered for upgrades.
|
||
|
||
The effect is that a user can manually place a specific version of a
|
||
package inside 'package-directory-list' and the package menu will
|
||
always respect that.
|
||
|
||
*** If a package is available on multiple archives and one has higher
|
||
priority (as per 'package-archive-priorities') only that one is
|
||
listed. This can be configured with 'package-menu-hide-low-priority'.
|
||
|
||
*** 'package-menu-toggle-hiding' now toggles the hiding of packages.
|
||
This includes the above-mentioned low-priority packages, as well as
|
||
available packages whose version is lower than the currently installed
|
||
version (which were previously impossible to display).
|
||
This allows users to downgrade a package if a lower version is
|
||
available.
|
||
|
||
*** When filtering the package menu, keywords starting with "arc:" or
|
||
"status:" represent package archive or status, respectively, instead
|
||
of actual keywords.
|
||
|
||
*** Most functions which involve downloading information now take an
|
||
ASYNC argument. If it is non-nil, package.el performs the download(s)
|
||
asynchronously.
|
||
|
||
*** New variable 'package-menu-async' controls whether the
|
||
package-menu uses asynchronous downloads.
|
||
|
||
*** 'package-install-from-buffer' and 'package-install-file' work on directories.
|
||
This follows the same rules as installing from a .tar file, except the
|
||
-pkg file is optional.
|
||
|
||
*** Packages which are dependencies of other packages cannot be deleted.
|
||
The FORCE argument to 'package-delete' overrides this.
|
||
|
||
*** New custom variable 'package-selected-packages' tracks packages
|
||
which were installed by the user (as opposed to installed as
|
||
dependencies). This variable can also be manually customized.
|
||
|
||
*** New command 'package-install-selected-packages' installs all
|
||
packages from 'package-selected-packages' which are currently missing.
|
||
|
||
*** 'package-install' function now takes a DONT-SELECT argument. If
|
||
this function is called interactively or if DONT-SELECT is nil, add the
|
||
package being installed to 'package-selected-packages'.
|
||
|
||
*** New command 'package-autoremove' removes all packages which were
|
||
installed strictly as dependencies but are no longer needed.
|
||
|
||
** Shell
|
||
|
||
When you invoke 'shell' interactively, the '*shell*' buffer will now
|
||
display in a new window. However, you can customize this behavior via
|
||
the 'display-buffer-alist' variable. For example, to get
|
||
the old behavior -- '*shell*' buffer displays in current window -- use
|
||
(add-to-list 'display-buffer-alist
|
||
'("^\\*shell\\*$" . (display-buffer-same-window))).
|
||
|
||
** EIEIO
|
||
*** The ':protection' slot option is not obeyed any more.
|
||
*** The 'newname' argument to constructors is optional&deprecated.
|
||
If you need your objects to be named, do it by inheriting from 'eieio-named'.
|
||
*** The <class>-list-p and <class>-child-p functions are declared obsolete.
|
||
*** The <class> variables are declared obsolete.
|
||
*** The <initarg> variables are declared obsolete.
|
||
*** defgeneric and defmethod are declared obsolete.
|
||
Use the equivalent facilities from cl-generic.el instead.
|
||
*** 'constructor' is now an obsolete alias for 'make-instance'.
|
||
*** 'pcase' accepts a new UPattern 'eieio'.
|
||
|
||
** ido
|
||
|
||
*** New command 'ido-bury-buffer-at-head' bound to 'C-S-b'.
|
||
Bury the buffer at the head of 'ido-matches', analogous to how 'C-k'
|
||
kills the buffer at head.
|
||
|
||
*** A prefix argument to 'ido-restrict-to-matches' will reverse its
|
||
meaning, and the list is restricted to those elements that do not
|
||
match the current input.
|
||
|
||
** Minibuffer
|
||
|
||
*** You can use <UP> and <DOWN> arrow keys to move through history by lines.
|
||
The new commands 'next-line-or-history-element' and
|
||
'previous-line-or-history-element', bound to <UP> and <DOWN> in the
|
||
minibuffer, allow by-line movement through minibuffer history,
|
||
similarly to an ordinary buffer. Only when point moves over
|
||
the bottom/top of the minibuffer it goes to the next/previous history
|
||
element. 'M-p' and 'M-n' still move directly to previous/next history
|
||
item as before.
|
||
|
||
** Search and Replace
|
||
|
||
*** 'isearch' and 'query-replace' can now perform character folding in matches.
|
||
This is analogous to case folding, but instead of disregarding case
|
||
variants, it disregards wider classes of distinctions between similar
|
||
characters. (Case folding is a special case of character folding.)
|
||
This means many characters in the search string will match entire
|
||
groups of characters instead of just themselves.
|
||
|
||
For instance, the ASCII double quote character " will match all
|
||
variants of double quotes, and the letter 'a' will match all of its
|
||
accented cousins, even those composed of multiple characters, as well
|
||
as many other symbols like U+249C (PARENTHESIZED LATIN SMALL LETTER
|
||
A).
|
||
|
||
Character folding is enabled by customizing 'search-default-mode' to
|
||
the value 'char-fold-to-regexp'. You can also toggle character
|
||
folding in the middle of a search by typing 'M-s ''.
|
||
|
||
'query-replace' honors character folding if the new variable
|
||
'replace-char-fold' is customized to a non-nil value.
|
||
|
||
*** New user option 'search-default-mode'.
|
||
This option specifies the default mode for Isearch. The default
|
||
value, nil specifies that Isearch does literal searches (however,
|
||
'case-fold-search' and 'isearch-lax-whitespace' may still be applied,
|
||
as in previous Emacs versions).
|
||
|
||
*** New function 'char-fold-to-regexp' can be used
|
||
by searching commands to produce a regexp matching anything that
|
||
char-folds into STRING.
|
||
|
||
*** The new 'M-s M-w' key binding uses eww to search the web for the
|
||
text in the region. The search engine to use for this is specified by
|
||
the customizable variable 'eww-search-prefix'.
|
||
|
||
*** 'query-replace' history is enhanced.
|
||
When 'query-replace' reads the FROM string from the minibuffer, typing
|
||
'M-p' will now show previous replacements as "FROM SEP TO", where FROM
|
||
and TO are the original text and its replacement, and SEP is an arrow
|
||
string defined by the new variable 'query-replace-from-to-separator'.
|
||
To select a prior replacement, type 'M-p' until the desired
|
||
replacement appears in the minibuffer, and then exit the minibuffer by
|
||
typing RET.
|
||
|
||
** Calc
|
||
*** If 'quick-calc' is called with a prefix argument, insert the
|
||
result of the calculation into the current buffer.
|
||
|
||
** In Edebug, you can now set the initial mode with 'C-x C-a C-m'.
|
||
With this you can tell Edebug not to stop at the start of the first
|
||
instrumented function.
|
||
|
||
** ElDoc
|
||
|
||
*** New minor mode 'global-eldoc-mode'.
|
||
It is turned on by default, and affects '*scratch*' and other buffers
|
||
whose major mode supports Emacs Lisp.
|
||
|
||
*** 'eldoc-documentation-function' now defaults to 'ignore'.
|
||
|
||
*** 'describe-char-eldoc' displays information about character at point,
|
||
and can be used as a default value of 'eldoc-documentation-function'. It is
|
||
useful when, for example, one needs to distinguish various spaces - e.g.,
|
||
U+00A0 (NO-BREAK SPACE), U+2002 (EN SPACE), and U+2009 (THIN SPACE) - while
|
||
using mono-spaced font.
|
||
|
||
** eww
|
||
|
||
*** HTML can now be rendered using variable-width fonts.
|
||
|
||
*** A new command 'F' ('eww-toggle-fonts') can be used to toggle
|
||
whether to use variable-pitch fonts or not. The user can also
|
||
customize the 'shr-use-fonts' variable.
|
||
|
||
*** A new command 'R' ('eww-readable') will try do identify the main
|
||
textual parts of a web page and display only that, leaving menus and
|
||
the like off the page.
|
||
|
||
*** A new command 'D' ('eww-toggle-paragraph-direction') allows you to
|
||
toggle the paragraph direction between left-to-right and right-to-left.
|
||
|
||
*** You can now use several eww buffers in parallel by renaming eww
|
||
buffers you want to keep separate.
|
||
|
||
*** Partial state of the eww buffers (the URIs and the titles of the
|
||
pages visited) is now preserved in the desktop file.
|
||
|
||
*** 'eww-after-render-hook' is now called after eww has rendered
|
||
the data in the buffer.
|
||
|
||
*** The 'eww-reload' command now takes a prefix to not reload via
|
||
the net, but just use the local copy of the HTML.
|
||
|
||
*** The DOM shr and eww uses has been changed to the general Emacs
|
||
xml.el/libxml2 DOM, and a new package dom.el has been added to
|
||
interact with this DOM. See the Emacs Lisp manual for interface
|
||
details.
|
||
|
||
*** 'mailcap-mime-data' is now consulted when displaying PDF files.
|
||
|
||
*** The new 'S' command will list all eww buffers, and allow managing
|
||
them.
|
||
|
||
*** https pages with valid certificates have headers marked in green, while
|
||
invalid certificates are marked in red.
|
||
|
||
** Message mode
|
||
|
||
*** text/html messages that contain inline image parts will be
|
||
transformed into multipart/related messages before sending.
|
||
|
||
** In Show Paren Mode, a parenthesis can be highlighted when point
|
||
stands inside it, and certain parens can be highlighted when point is
|
||
at BOL or EOL, or in whitespace there. To enable these, customize,
|
||
respectively, 'show-paren-when-point-inside-paren' or
|
||
'show-paren-when-point-in-periphery'.
|
||
|
||
** If gpg2 exists on the system, it is now used as the default value
|
||
of 'epg-gpg-program' (instead of gpg).
|
||
|
||
** Lisp mode
|
||
|
||
*** Strings after ':documentation' are highlighted as docstrings.
|
||
This enhances Lisp mode fontification to handle documentation of the
|
||
form '(:documentation "the doc string")' used in Common Lisp code for
|
||
CLOS class and slot documentation.
|
||
|
||
** Rectangle editing
|
||
|
||
*** Rectangle Mark mode can have corners past EOL or in the middle of a TAB.
|
||
|
||
*** 'C-x C-x' in 'rectangle-mark-mode' now cycles through the four corners.
|
||
|
||
*** 'string-rectangle' provides on-the-fly preview of the result.
|
||
Customize 'rectangle-preview' to nil for the old behavior.
|
||
|
||
** New font-lock functions 'font-lock-ensure' and 'font-lock-flush'.
|
||
These should be used in preference to 'font-lock-fontify-buffer' when
|
||
called from Lisp.
|
||
|
||
** Macro 'minibuffer-with-setup-hook' can optionally append a function
|
||
to 'minibuffer-setup-hook'.
|
||
|
||
If the first argument of the macro is of the form '(:append FUN)',
|
||
then FUN will be appended to 'minibuffer-setup-hook', instead of
|
||
prepending it.
|
||
|
||
** cl-lib
|
||
*** New functions 'cl-fresh-line', 'cl-digit-char-p', and 'cl-parse-integer'.
|
||
|
||
*** 'pcase' accepts the new UPattern 'cl-struct'.
|
||
|
||
** Calendar and diary
|
||
|
||
*** The default 'diary-file' is now located in "~/.emacs.d".
|
||
|
||
*** New commands to insert diary entries with Chinese dates:
|
||
'diary-chinese-insert-anniversary-entry' 'diary-chinese-insert-entry'
|
||
'diary-chinese-insert-monthly-entry', 'diary-chinese-insert-yearly-entry'.
|
||
|
||
*** The calendar can now list and mark diary entries with Chinese dates.
|
||
See 'diary-chinese-list-entries' and 'diary-chinese-mark-entries'.
|
||
|
||
*** The option 'calendar-mode-line-format' can now be nil,
|
||
which means to do nothing special with the mode line in calendars.
|
||
|
||
*** New option 'calendar-weekend-days'.
|
||
The option customizes which day headers receive the
|
||
'calendar-weekend-header' face.
|
||
|
||
*** New optional args N and STRING for 'holiday-greek-orthodox-easter'.
|
||
|
||
*** Many items obsolete since at least version 23.1 have been removed.
|
||
The majority were function/variable/face aliases, too numerous to list here.
|
||
The remainder were:
|
||
|
||
**** Functions 'calendar-one-frame-setup', 'calendar-only-one-frame-setup',
|
||
'calendar-two-frame-setup', 'european-calendar', 'american-calendar'.
|
||
|
||
**** Hooks 'cal-menu-load-hook', 'cal-x-load-hook'.
|
||
|
||
**** Macro 'calendar-for-loop'.
|
||
|
||
**** Variables 'european-calendar-style', 'diary-face', 'hebrew-holidays-{1,4}'.
|
||
|
||
**** The nil and list forms of 'diary-display-function'.
|
||
|
||
** New ERT function 'ert-summarize-tests-batch-and-exit'.
|
||
If the output of ERT tests in batch mode execution can be saved to a
|
||
log file, then it can be passed as an argument to the above function
|
||
to produce a neat summary.
|
||
|
||
** New js.el option 'js-indent-first-init'.
|
||
|
||
** Info
|
||
|
||
** Info mode now displays symbol names in fixed-pitch font.
|
||
If you want to get the old behavior back, customize the 'Info-quoted'
|
||
face to use the same definitions as the default face.
|
||
|
||
*** 'Info-fontify-maximum-menu-size' can be t for no limit.
|
||
|
||
*** 'info-display-manual' can now be given a prefix argument which (any
|
||
non-nil value) directs the command to limit the completion
|
||
alternatives to currently visited manuals.
|
||
|
||
** ntlm.el has support for NTLM2.
|
||
|
||
** Rmail
|
||
|
||
*** The Rmail commands 'd', 'C-d' and 'u' take optional repeat counts
|
||
to delete or undelete multiple messages.
|
||
|
||
*** Rmail can now render HTML mail messages if your Emacs was built with
|
||
libxml2 or if you have the Lynx browser installed. By default, Rmail
|
||
will display the HTML version of a mail message that has both HTML and
|
||
plain text parts, if display of HTML email is possible; customize the
|
||
'rmail-mime-prefer-html' option to nil if you don't want that.
|
||
|
||
*** In the commands that make summaries by subject, recipients, or senders,
|
||
you can no longer use commas to separate regular expressions.
|
||
|
||
** SES now supports local printer functions; see 'ses-define-local-printer'.
|
||
|
||
** Shell-script Mode
|
||
*** In sh-mode you can now use 'sh-shell' as a file-local variable to
|
||
specify the type of shell in use (bash, csh, etc).
|
||
|
||
*** New value 'always' for 'sh-indent-after-continuation'.
|
||
This provides old-style ("dumb") indentation of continued lines.
|
||
See the doc string of 'sh-indent-after-continuation' for details.
|
||
|
||
** TLS
|
||
*** Fatal TLS errors are now silent by default.
|
||
|
||
*** If Emacs isn't built with TLS support, an external TLS-capable
|
||
program is used instead. This program used to be run in --insecure
|
||
mode by default, but has now changed to be secure instead, and will
|
||
fail if you try to connect to non-verifiable hosts. This is
|
||
controlled by the 'tls-program' variable.
|
||
|
||
** URL
|
||
|
||
*** The URL package accepts now the protocols "ssh", "scp" and "rsync".
|
||
When 'url-handler-mode' is enabled, file operations for these
|
||
protocols as well as for "telnet" and "ftp" are passed to Tramp.
|
||
|
||
*** The URL package allows customizing the 'url-user-agent' string.
|
||
The new 'url-user-agent' variable can be customized to be a string or
|
||
a function.
|
||
|
||
*** The new interface variable 'url-request-noninteractive' can be used
|
||
to specify that we're running in a noninteractive context, and that
|
||
we should not be queried about things like TLS certificate validity.
|
||
|
||
*** 'url-mime-accept-string' can now be used as in "interface"
|
||
variable, meaning you can bind it around an 'url-retrieve' call.
|
||
|
||
*** If URL is used with a https connection, the first callback argument
|
||
PLIST will contain a :peer element that has the output of
|
||
'gnutls-peer-status' (if Emacs is built with GnuTLS support).
|
||
|
||
** Tramp
|
||
|
||
*** New connection method "afp", which allows you to access macOS
|
||
volumes via the Apple Filing Protocol.
|
||
|
||
*** New connection method "nc", which allows you to access dumb
|
||
busyboxes.
|
||
|
||
*** Method-specific parameters can be overwritten now with variable
|
||
'tramp-connection-properties'.
|
||
|
||
*** Handler for 'file-notify-valid-p' for remote machines that support
|
||
filesystem notifications.
|
||
|
||
** SQL mode
|
||
|
||
*** New user variable 'sql-default-directory' enables remote
|
||
connections using Tramp.
|
||
|
||
*** New command 'sql-send-line-and-next'.
|
||
This command, bound to 'C-c C-n' by default, sends the current line to
|
||
the SQL process and advances to the next line, skipping whitespace and
|
||
comments.
|
||
|
||
*** Added support for Vertica SQL.
|
||
|
||
** VC and related modes
|
||
|
||
*** Basic push support, via 'vc-push', bound to 'C-x v P'.
|
||
Implemented for Bzr, Git, Hg. As part of this change, the pre-existing
|
||
(undocumented) command 'vc-hg-push' now behaves slightly differently.
|
||
|
||
*** The new command 'vc-region-history' shows the log+diff of the active region.
|
||
|
||
*** You can refresh the VC state of a file buffer with 'M-x vc-refresh-state'.
|
||
This command is useful when you perform version control commands
|
||
outside Emacs (e.g., from the shell prompt), or if you switch the VC
|
||
back-end for the buffer's file, or remove it from version control.
|
||
|
||
*** New option 'vc-annotate-background-mode' controls whether
|
||
the color range from 'vc-annotate-color-map' is applied to the
|
||
background or to the foreground.
|
||
|
||
*** New options for customizing encoding of Git commit log messages.
|
||
The new user options 'vc-git-commits-coding-system' and
|
||
'vc-git-log-output-coding-system' specify the encoding of log messages
|
||
sent to Git when committing, and the decoding of log messages read
|
||
from Git history commands. These options default to UTF-8; if
|
||
customized, they should be consistent with the Git config variables
|
||
i18n.commitEncoding and i18n.logOutputEncoding.
|
||
('vc-git-commits-coding-system' existed previously, but was a
|
||
variable, not a user option.)
|
||
|
||
*** 'compare-windows' now compares text with the most recently selected window
|
||
instead of the next window. If you want the previous behavior of
|
||
comparing with the next window, customize the new option
|
||
'compare-windows-get-window-function' to the value
|
||
'compare-windows-get-next-window'.
|
||
|
||
*** Two new faces 'compare-windows-removed' and 'compare-windows-added'
|
||
replace the face 'compare-windows', which is now an obsolete alias for
|
||
'compare-windows-added'.
|
||
|
||
*** The VC state indicator in the mode line now has different faces
|
||
corresponding to each of the possible states. See the 'vc-faces'
|
||
customization group.
|
||
|
||
*** 'log-edit-insert-changelog' converts "(tiny change)" to
|
||
"Copyright-paperwork-exempt: yes". Set 'log-edit-rewrite-tiny-change'
|
||
nil to disable this.
|
||
|
||
*** vc-mcvs.el has been removed.
|
||
|
||
** VHDL mode now supports VHDL'08.
|
||
|
||
** Calculator
|
||
|
||
*** Decimal display mode uses "," groups, so it's more
|
||
fitting for use in money calculations
|
||
|
||
*** Factorial works with non-integer inputs.
|
||
|
||
** Hide-IfDef mode
|
||
|
||
*** Hide-IfDef mode now support full C/C++ expressions in macros,
|
||
macro argument expansion, interactive macro evaluation and automatic
|
||
scanning of #define'd symbols.
|
||
|
||
*** New command 'hif-evaluate-macro', bound to 'C-c @ e', displays the
|
||
result of evaluating a macro.
|
||
|
||
*** New command 'hif-clear-all-ifdef-define', bound to 'C-c @ C', clears
|
||
all defined symbols in 'hide-ifdef-env'.
|
||
|
||
*** New custom variable 'hide-ifdef-header-regexp' to define C/C++ header
|
||
file name patterns. Defaults to files whose extension is one of '.h',
|
||
'.hh', '.hpp', '.hxx', or '.h++', matched case-insensitively.
|
||
|
||
*** New custom variable 'hide-ifdef-expand-reinclusion-protection' to prevent
|
||
reinclusion protected (a.k.a. "idempotent") header files from being hidden.
|
||
(This could happen when an idempotent header file is visited again,
|
||
when its guard symbol is already defined.) Defaults to t.
|
||
|
||
*** New custom variable 'hide-ifdef-exclude-define-regexp' to define symbol
|
||
name patterns (e.g. all "FOR_DOXYGEN_ONLY_*") to be ignored when
|
||
looking for macro definitions. By default, no symbols are ignored.
|
||
|
||
** TeX mode
|
||
|
||
*** New custom variable 'tex-print-file-extension' to help users who
|
||
use PDF instead of DVI.
|
||
|
||
*** TeX mode now supports Prettify Symbols mode. When enabling
|
||
'prettify-symbols-mode' in a tex-mode buffer, \alpha ... \omega, and
|
||
many other math macros are displayed using unicode characters.
|
||
|
||
** New 'big-indent' style in 'whitespace-mode' highlights deep indentation.
|
||
By default, 32 consecutive spaces or four consecutive TABs are
|
||
considered to be too deep, but the new variable
|
||
'whitespace-big-indent-regexp' can be customized to change that.
|
||
|
||
** New options in 'tildify-mode'.
|
||
New options 'tildify-space-string', 'tildify-pattern', and
|
||
'tildify-foreach-region-function' variables make
|
||
'tildify-string-alist', 'tildify-pattern-alist', and
|
||
'tildify-ignored-environments-alist' variables (as well as a few
|
||
helper functions) obsolete.
|
||
|
||
** New package Xref replaces Etags's front-end and UI.
|
||
|
||
The new package Xref provides a generic framework and new commands to
|
||
find and move to definitions of functions, macros, data structures
|
||
etc., as well as go back to the location where you were before moving
|
||
to a definition. It supersedes and obsoletes many Etags commands,
|
||
while still using the etags.el code that reads the TAGS tables as one
|
||
of its back-ends.
|
||
|
||
The command 'xref-find-definitions' replaces 'find-tag' and provides
|
||
an interface to pick one definition among several.
|
||
'tags-loop-continue' is now unbound. 'xref-pop-marker-stack' replaces
|
||
'pop-tag-mark', but has a keybinding ('M-,') different from the one
|
||
'pop-tag-mark' used.
|
||
|
||
'xref-find-definitions-other-window' replaces 'find-tag-other-window'.
|
||
'xref-find-definitions-other-frame' replaces 'find-tag-other-frame'.
|
||
'xref-find-apropos' replaces 'find-tag-regexp'.
|
||
|
||
As a result of this, the following commands are now obsolete:
|
||
'find-tag-other-window', 'find-tag-other-frame', 'find-tag-regexp',
|
||
'tags-apropos'.
|
||
|
||
'tags-loop-continue' is not obsolete because it's still useful in
|
||
'tags-search' and 'tags-query-replace', for which there are no direct
|
||
replacements yet.
|
||
|
||
*** Variants of 'tags-search' and 'tags-query-replace' in Dired were also
|
||
replaced by xref-style commands, see the "Dired" section below.
|
||
|
||
*** New variables
|
||
|
||
'find-tag-marker-ring-length' is now an obsolete alias for
|
||
'xref-marker-ring-length'. 'find-tag-marker-ring' is now an obsolete
|
||
alias for a private variable. 'xref-push-marker-stack' and
|
||
'xref-pop-marker-stack' should be used instead to manipulate the stack
|
||
of searches for definitions.
|
||
|
||
*** 'xref-find-definitions' and 'describe-function' now display
|
||
information about mode local overrides (defined by cedet/mode-local.el
|
||
'define-overloadable-function' 'define-mode-local-overrides').
|
||
|
||
The framework's Lisp API is still experimental and can change in major,
|
||
backward-incompatible ways.
|
||
|
||
** New package Project
|
||
|
||
The new package Project provides generic infrastructure for dealing
|
||
with projects. The main commands included in it are
|
||
'project-find-file' and 'project-find-regexp'.
|
||
|
||
The Lisp API of this package is still experimental.
|
||
|
||
** EUDC
|
||
EUDC's LDAP backend has been improved.
|
||
|
||
*** EUDC supports LDAP-over-SSL URLs (ldaps://).
|
||
|
||
*** EUDC passes LDAP passwords through a pipe to the ldapsearch
|
||
subprocess instead of on the command line.
|
||
|
||
*** EUDC handles LDAP wildcards automatically so the user shouldn't
|
||
need to configure this manually anymore.
|
||
|
||
*** The LDAP configuration section of EUDC's manual has been
|
||
rewritten.
|
||
|
||
There have also been customization changes.
|
||
|
||
*** New custom variable 'eudc-server-hotlist' to allow specifying
|
||
multiple EUDC servers in init file.
|
||
|
||
*** Custom variable 'eudc-inline-query-format' defaults to completing
|
||
on email and firstname instead of surname.
|
||
|
||
*** Custom variable 'eudc-expansion-overwrites-query' defaults to nil
|
||
to avoid interfering with the kill ring.
|
||
|
||
*** Custom variable 'eudc-inline-expansion-format' defaults to
|
||
"Firstname Surname <mail-address>".
|
||
|
||
*** Custom variable 'eudc-options-file' defaults to
|
||
"~/.emacs.d/eudc-options".
|
||
|
||
*** New custom variable 'ldap-ldapsearch-password-prompt-regexp' to
|
||
allow overriding the regular expression that recognizes the ldapsearch
|
||
command line's password prompt.
|
||
|
||
*** EUDC's BBDB backend now supports BBDB 3.
|
||
|
||
*** EUDC's PH backend (eudcb-ph.el) is obsolete.
|
||
|
||
** Eshell
|
||
|
||
*** The new built-in command 'clear' can scroll window contents out of sight.
|
||
If provided with an optional non-nil argument, the scrollback contents
|
||
will be cleared.
|
||
|
||
*** New buffer syntax '#<buffer-name>', which is equivalent to
|
||
'#<buffer buffer-name>'. This shorthand makes interacting with
|
||
buffers from eshell more convenient. Custom variable
|
||
'eshell-buffer-shorthand', which has been broken for a while, has been
|
||
removed.
|
||
|
||
*** By default, eshell "visual" program buffers (created by
|
||
'eshell-visual-commands' and similar custom vars) are no longer killed
|
||
when their processes die. This fixes issues with short-lived commands
|
||
and makes visual programs more useful in general. For example, if
|
||
"git log" is a visual command, it will always show the visual command
|
||
buffer, even if the "git log" process dies. For the old behavior,
|
||
make the new option 'eshell-destroy-buffer-when-process-dies' non-nil.
|
||
|
||
** Browse-url
|
||
|
||
*** Support for the Google Chrome web browser.
|
||
|
||
*** Support for the Conkeror web browser.
|
||
|
||
*** Support for several ancient browsers is now officially obsolete.
|
||
|
||
** 'tar-mode': new 'tar-new-entry' command, allowing for new members to
|
||
be added to the archive.
|
||
|
||
** Autorevert
|
||
|
||
*** Dired buffers are also auto-reverted via file notifications, if
|
||
Emacs is compiled with file notification support.
|
||
|
||
*** 'auto-revert-use-notify' is set to nil in 'global-auto-revert-mode'.
|
||
See <https://debbugs.gnu.org/22814>.
|
||
|
||
** File Notifications
|
||
|
||
*** The kqueue library is integrated for *BSD and macOS machines.
|
||
|
||
*** The new event 'stopped' signals, that a file notification watch is
|
||
not active any longer.
|
||
|
||
*** The new function 'file-notify-valid-p' checks, whether a file
|
||
notification descriptor still corresponds to an activate watch.
|
||
|
||
** Dired
|
||
|
||
*** The command 'dired-do-compress', bound to 'Z', now can compress
|
||
directories and decompress zip files.
|
||
|
||
*** New command 'dired-do-compress-to', bound to 'c', can be used to
|
||
compress many marked files into a single named archive. The
|
||
compression command is determined from the new
|
||
'dired-compress-files-alist' variable.
|
||
|
||
*** New user interface for the 'A' and 'Q' commands.
|
||
These keys, now bound to 'dired-do-find-regexp' and
|
||
'dired-do-find-regexp-and-replace', work similarly to 'xref-find-apropos'
|
||
and 'xref-query-replace-in-results': they present the matches
|
||
in the '*xref*' buffer and let you move through the matches. No need
|
||
to use 'tags-loop-continue' to resume the search or replace loop. The
|
||
previous commands, 'dired-do-search' and
|
||
'dired-do-query-replace-regexp', are still available, but not bound to
|
||
keys; rebind 'A' and 'Q' to invoke them if you want the old behavior
|
||
back. We intend to obsolete the old commands in a future release.
|
||
|
||
** Tabulated List Mode
|
||
|
||
*** It is now safe for a mode that derives 'tabulated-list-mode' to not
|
||
call 'tabulated-list-init-header', in which case it will have no
|
||
header.
|
||
|
||
*** 'tabulated-list-print' takes a second optional argument, UPDATE,
|
||
which specifies an alternative printing method which is faster when
|
||
few or no entries have changed.
|
||
|
||
** Obsolete packages
|
||
|
||
*** gulp.el
|
||
|
||
*** landmark.el (moved to elpa.gnu.org)
|
||
|
||
|
||
* New Modes and Packages in Emacs 25.1
|
||
|
||
** pinentry.el allows GnuPG passphrase to be prompted through the
|
||
minibuffer instead of a graphical dialog, depending on whether the gpg
|
||
command is called from Emacs (i.e., INSIDE_EMACS environment variable
|
||
is set). This feature requires newer versions of GnuPG (2.1.5 or
|
||
later) and Pinentry (0.9.5 or later). To use this feature, add
|
||
"allow-emacs-pinentry" to "~/.gnupg/gpg-agent.conf" and reload the
|
||
configuration with "gpgconf --reload gpg-agent".
|
||
|
||
** cl-generic.el provides CLOS-style multiple-dispatch generic functions.
|
||
The main entry points are 'cl-defgeneric' and 'cl-defmethod'. See the
|
||
node "Generic Functions" in the Emacs Lisp manual for more details.
|
||
|
||
** 'scss-mode' (a minor variant of 'css-mode') is a major mode for editing
|
||
SCSS (Sassy CSS) files.
|
||
|
||
** 'let-alist' is a new macro (and a package) that allows one to easily
|
||
let-bind the values stored in an alist.
|
||
|
||
** 'tildify-mode' allows automatic insertion of hard spaces as one
|
||
types the text. Breaking line after a single-character words is
|
||
forbidden by Czech and Polish typography (and may be discouraged in
|
||
other languages), so 'auto-tildify-mode' makes it easier to create
|
||
a typographically-correct documents.
|
||
|
||
** The 'seq' library adds sequence manipulation functions and macros
|
||
that complement basic functions provided by subr.el. All functions
|
||
are prefixed with 'seq-' and work on lists, strings and vectors.
|
||
'pcase' accepts a new Upattern 'seq'.
|
||
|
||
** The 'map' library provides map-manipulation functions that work on
|
||
alists, hash-table and arrays. All functions are prefixed with
|
||
'map-'. 'pcase' accepts a new UPattern 'map'.
|
||
|
||
** The 'thunk' library provides functions and macros to control the
|
||
evaluation of forms.
|
||
|
||
** 'js-jsx-mode' (a minor variant of 'js-mode') provides indentation
|
||
support for JSX, an XML-like syntax extension to ECMAScript.
|
||
|
||
|
||
* Incompatible Lisp Changes in Emacs 25.1
|
||
|
||
** 'setq' and 'setf' must now be called with an even number of
|
||
arguments. The earlier behavior of silently supplying a nil to the
|
||
last variable when there was an odd number of arguments has been
|
||
eliminated.
|
||
|
||
** 'syntax-begin-function' is declared obsolete.
|
||
Removed 'font-lock-beginning-of-syntax-function' and the SYNTAX-BEGIN
|
||
slot in 'font-lock-defaults'.
|
||
|
||
** The new implementation of Subword mode affects word movement everywhere.
|
||
When Subword mode is turned on, 'forward-word', 'backward-word', and
|
||
everything that uses them will move by sub-words, effectively
|
||
overriding the buffer's syntax table. Lisp programs that shouldn't be
|
||
affected by Subword mode should call the new functions
|
||
'forward-word-strictly' and 'backward-word-strictly' instead.
|
||
|
||
** 'package-initialize' now sets 'package-enable-at-startup' to nil if
|
||
called during startup. Users who call this function in their init
|
||
file and still expect it to be run after startup should set
|
||
'package-enable-at-startup' to t after the call to
|
||
'package-initialize'.
|
||
|
||
** ':global' minor mode use 'setq-default' rather than 'setq'.
|
||
This means that you can't use 'make-local-variable' and expect them to
|
||
"magically" become buffer-local.
|
||
|
||
** 'track-mouse' no longer freezes the shape of the mouse pointer.
|
||
The 'track-mouse' form no longer refrains from changing the shape of
|
||
the mouse pointer for the entire time the body of that form is
|
||
executed. Lisp programs that use 'track-mouse' for dragging across
|
||
large portions of the Emacs display, and want to avoid changes in the
|
||
pointer shape during dragging, should bind the variable 'track-mouse'
|
||
to the special value 'dragging' in the body of the form.
|
||
|
||
** The optional PREDICATE argument of 'lisp-complete-symbol' no longer
|
||
has any effect. (This change was made in Emacs 24.4 but was not
|
||
advertised at the time.)
|
||
|
||
** 'indirect-function' does not signal 'void-function' any more.
|
||
This is mostly a bug-fix, since this change was missed back in 24.4 when
|
||
'symbol-function' was changed not to signal 'void-function' any more.
|
||
|
||
*** As a consequence, the second arg of 'indirect-function' is now obsolete.
|
||
|
||
** 'M-x shell' and 'M-x compile' no longer set the EMACS environment variable.
|
||
This avoids clashing when other programs use the variable for other purposes.
|
||
Although 'M-x term' still sets EMACS for compatibility with Bash 4.3
|
||
and earlier, this is deprecated and will be phased out when Bash 4.4
|
||
or later takes over. Use the INSIDE_EMACS environment variable instead.
|
||
|
||
** 'save-excursion' does not save&restore the mark any more.
|
||
Use 'save-mark-and-excursion' if you want the old behavior.
|
||
|
||
** 'read-buffer' and 'read-buffer-function' can now be called with a 4th
|
||
argument (PREDICATE).
|
||
|
||
** 'completion-table-dynamic' by default stays in the minibuffer.
|
||
The minibuffer will be the current buffer when the function is called.
|
||
If you want the old behavior of calling the function in the buffer
|
||
from which the minibuffer was entered, use the new argument
|
||
SWITCH-BUFFER to 'completion-table-dynamic'.
|
||
|
||
** window-configurations no longer record the buffers' marks.
|
||
|
||
** 'inhibit-modification-hooks' now also inhibits lock-file checks, as
|
||
well as active region handling.
|
||
|
||
** 'deactivate-mark' is now buffer-local.
|
||
|
||
** 'cl-the' now asserts that its argument is of the given type.
|
||
|
||
** 'process-running-child-p' may now return a numeric process
|
||
group ID instead of t.
|
||
|
||
** Mouse click events on mode line or header line no longer include
|
||
any reference to a buffer position. The 6th member of the mouse
|
||
position list returned for such events is now nil.
|
||
|
||
** Menu items in keymaps do not support the "key shortcut cache" any more.
|
||
These slots used to hold key-shortcut data, but have been obsolete since
|
||
Emacs 21.
|
||
|
||
** Emacs no longer downcases the first letter of a system diagnostic
|
||
when signaling a file error. For example, it now reports "Permission
|
||
denied" instead of "permission denied". The old behavior was problematic
|
||
in languages like German where downcasing rules depend on grammar.
|
||
|
||
** New variable 'text-quoting-style' to control how Emacs translates quotes.
|
||
Set it to 'curve' for curved single quotes, to 'straight' for straight
|
||
apostrophes, and to 'grave' for grave accent and apostrophe. The
|
||
default value nil acts like 'curve' if curved single quotes are
|
||
displayable, and like 'grave' otherwise. The new variable affects
|
||
display of diagnostics and help, but not of info. As the variable is
|
||
not intended for casual use, it is not a user option.
|
||
|
||
** Message-issuing functions like 'message' and 'error' now translate
|
||
various sorts of single quotes in their format strings according to
|
||
the value of 'text-quoting-style' (see above). This translation
|
||
cannot be disabled. To get the old behavior, use 'format', which is
|
||
not affected by 'text-quoting-style', e.g., (message "%s" (format
|
||
"...." foo bar)).
|
||
|
||
** 'substitute-command-keys' now replaces quotes.
|
||
That is, it converts documentation strings' quoting style as per the
|
||
value of 'text-quoting-style'. Doc strings in source code can use
|
||
either curved single quotes or grave accents and apostrophes. As
|
||
before, characters preceded by \= are output as-is.
|
||
|
||
** The character classes [:alpha:] and [:alnum:] in regular expressions
|
||
now match multibyte characters using Unicode character properties.
|
||
If you want the old behavior where they matched any character with
|
||
word syntax, use '\sw' instead.
|
||
|
||
** The character classes [:graph:] and [:print:] in regular expressions
|
||
no longer match every multibyte character. Instead, Emacs now
|
||
consults the Unicode character properties to determine which
|
||
characters are graphic or printable. In particular, surrogates and
|
||
unassigned codepoints are now rejected. If you want the old behavior,
|
||
use [:multibyte:] instead.
|
||
|
||
** The 'diff' command uses the unified format now. To restore the old
|
||
behavior, set 'diff-switches' to '-c'.
|
||
|
||
** 'grep-template' and 'grep-find-template' values don't include the
|
||
--color argument anymore. It's added at the <C> place holder position
|
||
dynamically. Any third-party code that changes these templates should
|
||
be updated accordingly.
|
||
|
||
** '(/ N)' is now equivalent to '(/ 1 N)' rather than to '(/ N 1)'.
|
||
The new behavior is compatible with Common Lisp and with XEmacs.
|
||
This change does not affect Lisp code intended to be portable to
|
||
Emacs 24.2 and earlier, which did not support unary '/'.
|
||
|
||
** The 'default-directory' value doesn't have to end slash. To make
|
||
that happen, 'unhandled-file-name-directory' now defaults to calling
|
||
'file-name-as-directory'.
|
||
|
||
** The URL package now insists on sending only unibyte strings to server
|
||
This means packages that use URL cannot bind 'url-request-data' to
|
||
multibyte strings. If non-ASCII characters should be part of the URL
|
||
payload, then 'url-request-data' should be encoded to become a unibyte
|
||
string.
|
||
|
||
|
||
* Lisp Changes in Emacs 25.1
|
||
|
||
** 'pcase'
|
||
*** New UPatterns 'quote', 'app'.
|
||
*** New UPatterns can be defined with 'pcase-defmacro'.
|
||
*** New vector QPattern.
|
||
|
||
** 'syntax-propertize' is now automatically called on-demand during forward
|
||
parsing functions like 'forward-sexp'.
|
||
|
||
** New hooks 'prefix-command-echo-keystrokes-functions' and
|
||
'prefix-command-preserve-state-hook' allow the definition of prefix
|
||
commands other than the predefined 'C-u'.
|
||
|
||
** New functions 'filepos-to-bufferpos' and 'bufferpos-to-filepos'.
|
||
These allow conversion between buffer positions and the corresponding
|
||
file byte offsets, given the file's encoding.
|
||
|
||
** The default value of 'load-read-function' is now 'read'.
|
||
Previously, the default value of nil implied using 'read'.
|
||
|
||
** New hook 'pre-redisplay-functions'.
|
||
It is a bit easier to use than 'pre-redisplay-function'.
|
||
|
||
** The second arg of 'looking-back' should always be provided explicitly.
|
||
Previously, it was an optional argument, now it's mandatory.
|
||
|
||
** Text properties 'intangible', 'point-entered', and 'point-left' are obsolete.
|
||
Replaced by properties 'cursor-intangible' and 'cursor-sensor-functions',
|
||
implemented by the new 'cursor-intangible-mode' and
|
||
'cursor-sensor-mode' minor modes.
|
||
|
||
** 'inhibit-point-motion-hooks' now defaults to t and is obsolete.
|
||
Use the new minor modes 'cursor-intangible-mode' and
|
||
'cursor-sensor-mode' instead.
|
||
|
||
** New process type 'pipe', which can be used in combination with the
|
||
':stderr' keyword of 'make-process' to handle standard error output
|
||
of subprocess.
|
||
|
||
** New function 'make-process' provides an alternative interface to
|
||
'start-process'. It allows programs to set process parameters such as
|
||
process filter, sentinel, etc., through keyword arguments (similar to
|
||
'make-network-process').
|
||
|
||
** Subprocesses are automatically told about changes in window dimensions.
|
||
The new option 'window-adjust-process-window-size-function' controls
|
||
how subprocesses are told to adapt their logical window sizes to
|
||
changes in the Emacs window configuration. Its default value calls
|
||
'set-process-window-size' with the smallest dimensions of all the
|
||
windows that display the subprocess's buffer.
|
||
|
||
** A new function 'directory-files-recursively' returns all matching
|
||
files (recursively) under a directory.
|
||
|
||
** New variable 'inhibit-message', when bound to non-nil, inhibits
|
||
'message' and related functions from displaying messages in the echo
|
||
area. The output is still logged to the '*Messages*' buffer.
|
||
|
||
** A new text property 'inhibit-read-only' can be used in read-only
|
||
buffers to allow certain parts of the text to be writable.
|
||
|
||
** A new variable 'comment-end-can-be-escaped' is useful in languages
|
||
such as C and C++ where line comments with escaped newlines are
|
||
continued to the next line.
|
||
|
||
** New macro 'define-advice'.
|
||
|
||
** Emacs Lisp now supports generators.
|
||
See the "Generators" section of the ELisp manual for the details.
|
||
|
||
** New finalizer facility for running code when objects become unreachable.
|
||
See the "Finalizer Type" subsection in the ELisp manual for the
|
||
details.
|
||
|
||
** Lexical closures can use '(:documentation FORM)' to build their docstring.
|
||
It should be placed right where the docstring would be, and FORM is then
|
||
evaluated (and should return a string) when the closure is built.
|
||
|
||
** 'define-inline' provides a new way to define inlinable functions.
|
||
|
||
** New function 'macroexpand-1' to perform a single step of macro expansion.
|
||
|
||
** Some "x-*" functions were obsoleted and/or renamed:
|
||
*** 'x-select-text' is renamed 'gui-select-text'.
|
||
*** 'x-selection-value' is renamed 'gui-selection-value'.
|
||
*** 'x-get-selection' is renamed 'gui-get-selection'.
|
||
*** 'x-get-clipboard' and 'x-clipboard-yank' are marked obsolete.
|
||
*** 'x-get-selection-value' is renamed to 'gui-get-primary-selection'.
|
||
*** 'x-set-selection' is renamed to 'gui-set-selection'.
|
||
|
||
** New function 'string-greaterp', which return the opposite result of
|
||
'string-lessp'.
|
||
|
||
** The new functions 'string-collate-lessp' and 'string-collate-equalp'
|
||
preserve the collation order as defined by the system's locale(1)
|
||
environment. For the time being this is implemented for modern POSIX
|
||
systems and for MS-Windows, for other systems they fall back to their
|
||
counterparts 'string-lessp' and 'string-equal'.
|
||
|
||
*** The ls-lisp package uses 'string-collate-lessp' to sort file names.
|
||
The effect is that, on systems that use ls-lisp for Dired, the default
|
||
sort order of the files in Dired is now different from what it was in
|
||
previous versions of Emacs. In particular, the file names are sorted
|
||
disregarding punctuation, accents, and diacritics, and letter case is
|
||
ignored. For example, files whose name begin with a period will no
|
||
longer appear near the beginning of the directory listing. If you
|
||
want the old, locale-independent sorting, customize the new option
|
||
'ls-lisp-use-string-collate' to the nil value.
|
||
|
||
*** The MS-Windows specific variable 'w32-collate-ignore-punctuation',
|
||
if set to a non-nil value, causes the above 2 functions to ignore
|
||
symbol and punctuation characters when collating strings. This
|
||
emulates the behavior of modern Posix platforms when the locale's
|
||
codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
|
||
MS-Windows doesn't support UTF-8 as codeset in its locales.
|
||
|
||
** New function 'alist-get', which is a generalized variable
|
||
suitable for use with 'setf'.
|
||
|
||
** New function 'funcall-interactively', which works like 'funcall'
|
||
but makes 'called-interactively-p' treat the function as (you guessed it)
|
||
called interactively.
|
||
|
||
** New function 'function-put' to use instead of 'put' for function properties.
|
||
|
||
** The new function 'bidi-find-overridden-directionality' allows you to
|
||
find characters whose directionality was, perhaps maliciously,
|
||
overridden by directional override control characters. Lisp programs
|
||
can use this to detect potential phishing of URLs and other links that
|
||
exploits bidirectional display reordering.
|
||
|
||
** The new function 'buffer-substring-with-bidi-context' allows you to
|
||
copy a portion of a buffer into a different location while preserving
|
||
the visual appearance both of the copied text and the text at
|
||
destination, even when the copied text includes mixed bidirectional
|
||
text and directional control characters.
|
||
|
||
** New properties that can be specified with 'declare':
|
||
*** '(interactive-only INSTEAD)', says to use INSTEAD for non-interactive use.
|
||
*** '(pure VAL)', if VAL is non-nil, indicates the function is pure.
|
||
*** '(side-effect-free VAL)', if VAL is non-nil, indicates the function does not
|
||
have side effects.
|
||
|
||
** New macro 'with-file-modes', for evaluating expressions with default file
|
||
permissions set to temporary values (e.g., for creating private files).
|
||
|
||
** You can access the slots of structures using 'cl-struct-slot-value'.
|
||
|
||
** Function 'sort' can deal with vectors.
|
||
|
||
** Function 'system-name' now returns an updated value if the current
|
||
system's name has changed or if the Emacs process has changed systems.
|
||
To avoid long waits it no longer consults DNS to canonicalize the name
|
||
(in some cases this may affect generated message-id headers - customize
|
||
'message-user-fqdn' if this bothers you). The variable 'system-name'
|
||
is now obsolete.
|
||
|
||
** Function 'write-region' no longer outputs "Wrote FILE" in batch mode.
|
||
|
||
** If 'pwd' is called with a prefix argument, insert the current default
|
||
directory at point.
|
||
|
||
** New functions return extended information about fonts and faces.
|
||
|
||
*** The function 'font-info' now returns more details about a font.
|
||
In particular, it now returns the average width of the font's
|
||
characters, which can be used for geometry-related calculations.
|
||
|
||
*** A new function 'default-font-width' returns the average width of a
|
||
character in the current buffer's default font. If the default face
|
||
is remapped (see 'face-remapping-alist'), the value for the remapped
|
||
face is returned. This function complements the existing function
|
||
'default-font-height'.
|
||
|
||
*** New functions 'window-font-height' and 'window-font-width' return
|
||
the height and average width of characters in a specified face and
|
||
window. If FACE is remapped (see 'face-remapping-alist'), the
|
||
function returns the information for the remapped face.
|
||
|
||
*** A new function 'window-max-chars-per-line' returns the maximal
|
||
number of characters that can be displayed on one line. If a face
|
||
and/or window are provided, these values are used for the
|
||
calculation. This function is different from 'window-body-width' in
|
||
that it accounts for (i) continuation glyphs, (ii) the size of the
|
||
font, and (iii) the specified window.
|
||
|
||
** New utilities in subr-x.el:
|
||
|
||
*** New macros 'if-let' and 'when-let' allow defining bindings and to
|
||
execute code depending whether all values are true.
|
||
|
||
*** New macros 'thread-first' and 'thread-last' allow threading a form
|
||
as the first or last argument of subsequent forms.
|
||
|
||
** Documentation strings now support quoting with curved single quotes
|
||
in addition to the old style with grave accent and apostrophe. The
|
||
new style looks better on today's displays. In the new Electric Quote
|
||
mode, you can enter curved single quotes into documentation by typing
|
||
grave accent and apostrophe. Outside Electric Quote mode, you can
|
||
enter them by typing 'C-x 8 [' and 'C-x 8 ]', or (if your Alt key
|
||
works) by typing 'A-[' and 'A-]'. As described above under
|
||
'text-quoting-style', the user can specify how to display doc string
|
||
quotes.
|
||
|
||
** New function 'format-message' is like 'format' and also converts
|
||
curved single quotes, grave accents and apostrophes as per
|
||
'text-quoting-style'.
|
||
|
||
** 'show-help-function's arg is converted via 'substitute-command-keys'
|
||
before being passed to the function. Help strings, help-echo
|
||
properties, etc. can therefore contain command key escapes and
|
||
quotation marks.
|
||
|
||
** Time-related changes:
|
||
|
||
*** Time conversion functions now accept an optional ZONE argument
|
||
that specifies the time zone rules for conversion. ZONE is omitted or
|
||
nil for Emacs local time, t for Universal Time, 'wall' for system wall
|
||
clock time, or a string as in the TZ environment variable. The
|
||
affected functions are 'current-time-string', 'current-time-zone',
|
||
'decode-time', and 'format-time-string'. The function 'encode-time',
|
||
which already accepted a simple time zone rule argument, has been
|
||
extended to accept all the new forms.
|
||
|
||
*** Incompatible change in the third argument of 'format-time-string'.
|
||
Previously, any non-nil argument was interpreted as specifying Universal Time.
|
||
This is no longer true; packages that want Universal Time should pass t
|
||
as the third argument.
|
||
|
||
*** Time-related functions now consistently accept numbers
|
||
(representing seconds since the epoch) and nil (representing the
|
||
current time) as well as the usual list-of-integer representation.
|
||
Affected functions include 'current-time-string', 'current-time-zone',
|
||
'decode-time', 'float-time', 'format-time-string', 'seconds-to-time',
|
||
'time-add', 'time-less-p', 'time-subtract', 'time-to-day-in-year',
|
||
'time-to-days', and 'time-to-seconds'.
|
||
|
||
*** The 'encode-time-value' and 'with-decoded-time-value' macros have
|
||
been obsoleted.
|
||
|
||
*** 'calendar-next-time-zone-transition', 'time-add', and
|
||
'time-subtract' no longer return time values in the obsolete and
|
||
undocumented integer-pair format. Instead, they return a list of two
|
||
integers.
|
||
|
||
** New function 'set-binary-mode' allows switching a standard stream
|
||
of the Emacs process to binary I/O mode.
|
||
|
||
** The new function 'directory-name-p' can be used to check whether a file
|
||
name (as returned from, for instance, 'file-name-all-completions') is
|
||
a directory file name. It returns non-nil if the last character in
|
||
the name is a directory separator character (forward slash on GNU and
|
||
Unix systems, forward- or backslash on MS-Windows and MS-DOS).
|
||
|
||
** ASCII approximations to curved quotes are put in 'standard-display-table'
|
||
if the terminal cannot display curved quotes.
|
||
|
||
** Standard output and error streams now transliterate characters via
|
||
'standard-display-table', and encode output using 'locale-coding-system'.
|
||
To force a specific encoding, bind 'coding-system-for-write' to the
|
||
coding-system of your choice when invoking functions like 'prin1' and
|
||
'message'.
|
||
|
||
** New var 'truncate-string-ellipsis' to choose how to indicate truncation.
|
||
|
||
** New possible value for 'system-type': 'nacl'.
|
||
This is used by Google's Native Client (NaCl).
|
||
|
||
** Miscellaneous name change
|
||
|
||
For consistency with the usual Emacs spelling, the Lisp variable
|
||
'hfy-optimisations' has been renamed to 'hfy-optimizations'.
|
||
The old name should still work, as an obsolescent alias.
|
||
|
||
** Changes in Frame- and Window- Handling
|
||
|
||
*** Emacs can now draw horizontal scroll bars on some platforms that
|
||
provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
|
||
Horizontal scroll bars are turned off by default.
|
||
|
||
**** New function 'horizontal-scroll-bars-available-p' telling whether
|
||
horizontal scroll bars are available on the underlying system.
|
||
|
||
**** New mode 'horizontal-scroll-bar-mode' to toggle horizontal scroll
|
||
bars on all existing and future frames.
|
||
|
||
**** New function 'toggle-horizontal-scroll-bar' to toggle horizontal
|
||
scroll bars on the selected frame.
|
||
|
||
**** New frame parameters 'horizontal-scroll-bars' and
|
||
'scroll-bar-height' to set horizontal scroll bars and their height
|
||
for individual frames and in 'default-frame-alist'.
|
||
|
||
***** The 'horizontal-scroll-bars' parameter was already present and non-nil
|
||
by default in Emacs 24 and before (although it didn't have any
|
||
effect). This could cause a problem if you share your desktop files
|
||
with older versions of Emacs: saving desktop in Emacs before v25.1,
|
||
then restoring it in v25.1 would turn on horizontal scroll bars in all
|
||
buffers. To resolve this issue, put this in your ~/.emacs init file:
|
||
|
||
(modify-all-frames-parameters '((horizontal-scroll-bars . nil)))
|
||
|
||
**** New functions 'frame-scroll-bar-height' and
|
||
'window-scroll-bar-height' return the height of horizontal scroll
|
||
bars on a specific frame or window.
|
||
|
||
**** 'set-window-scroll-bars' now accepts five parameters where the last
|
||
two specify height and type of the window's horizontal scroll bar.
|
||
|
||
**** 'window-scroll-bars' now returns type and sizes of horizontal scroll
|
||
bars too.
|
||
|
||
**** New buffer-local variables 'horizontal-scroll-bar' and
|
||
'scroll-bar-height'.
|
||
|
||
*** New functions 'frame-geometry' and 'frame-edges' give access to a
|
||
frame's geometry.
|
||
|
||
*** New functions 'mouse-absolute-pixel-position' and
|
||
'set-mouse-absolute-pixel-position' get/set screen coordinates of the
|
||
mouse cursor.
|
||
|
||
*** The function 'window-edges' now accepts three additional arguments to
|
||
retrieve body, absolute and pixel edges of the window.
|
||
|
||
*** The functions 'window-inside-edges', 'window-inside-pixel-edges' and
|
||
'window-inside-absolute-pixel-edges' have been renamed to respectively
|
||
'window-body-edges', 'window-body-pixel-edges' and
|
||
'window-absolute-body-pixel-edges'. The old names are kept as aliases.
|
||
|
||
*** New function 'window-absolute-pixel-position' to get the screen
|
||
coordinates of a visible buffer position.
|
||
|
||
*** The height of a frame's menu and tool bar are no longer counted in the
|
||
frame's text height. This means that the text height stands only for
|
||
the height of the frame's root window plus that of the echo area (if
|
||
present). This was already the behavior for frames with external tool
|
||
and menu bars (like in the Gtk builds) but has now been extended to all
|
||
builds.
|
||
|
||
*** Frames now do not necessarily preserve the number of columns or lines
|
||
they display when setting default font, menu bar, fringe width, or
|
||
scroll bars. In particular, maximized and fullscreen frames are
|
||
conceptually never resized if such settings change. For fullheight and
|
||
fullwidth frames, the behavior may depend on the toolkit used.
|
||
|
||
**** New option 'frame-inhibit-implied-resize' if non-nil, means that
|
||
setting default font, menu bar, fringe width, or scroll bars of a
|
||
specific frame does not resize that frame in order to preserve the
|
||
number of columns or lines it displays.
|
||
|
||
*** New function 'window-preserve-size' allows you to preserve the size of
|
||
a window without "fixing" it. It's supported by 'fit-window-to-buffer',
|
||
'temp-buffer-resize-mode' and 'display-buffer'.
|
||
|
||
*** New 'display-buffer' action function 'display-buffer-use-some-frame'.
|
||
This displays the buffer in an existing frame other than the current
|
||
frame, and allows the caller to specify a frame predicate to exclude
|
||
frames.
|
||
|
||
*** New minor mode 'window-divider-mode' and options
|
||
'window-divider-default-places', 'window-divider-default-bottom-width'
|
||
and 'window-divider-default-right-width'.
|
||
|
||
*** When a window is shrunk horizontally its margins are no longer removed
|
||
automatically. Rather, Emacs refuses to split or resize windows when
|
||
this would cause margins to no longer fit into the width reserved for the
|
||
corresponding window. An application can override this behavior for a
|
||
particular window by setting that window's 'min-margins' parameter. As
|
||
a consequence, the application becomes fully responsible for trimming
|
||
the margin sizes of that window and any window inheriting these margins.
|
||
|
||
*** The window displaying the '*Completions*' buffer with minibuffer
|
||
completion candidates is now shown at the bottom of the selected
|
||
frame. The size of that window is always as large as required to
|
||
display all the candidates, except when limited by the minimum size
|
||
of the other windows on that frame; those other windows are resized
|
||
to provide space for the '*Completions*' display. The Emacs manual
|
||
describes how to customize 'display-buffer-alist' to get back the old
|
||
behavior, see the node "Temporary Displays" there.
|
||
|
||
** Tearoff menus and detachable toolbars for Gtk+ have been removed.
|
||
Those features have been deprecated in Gtk+ for a long time.
|
||
|
||
** Etags
|
||
|
||
*** etags no longer qualifies class members by default.
|
||
|
||
By default, 'etags' will not qualify class members for Perl and C-like
|
||
object-oriented languages with their class names and namespaces, and
|
||
will remove qualifications used explicitly in the code from the tag
|
||
names it puts in TAGS files. This is so the etags.el back-end for
|
||
'xref-find-definitions' is more accurate and produces less false
|
||
positives.
|
||
|
||
Use --class-qualify (-Q) if you want the old default behavior of
|
||
qualifying class members in C++, Java, Objective C, and Perl. Note
|
||
that using -Q might make some class members become "unknown" to 'M-.'
|
||
('xref-find-definitions'); if so, you can use 'C-u M-.' to specify the
|
||
qualified names by hand.
|
||
|
||
*** New language Ruby
|
||
|
||
Names of modules, classes, methods, functions, and constants are
|
||
tagged. Overloaded operators are also tagged.
|
||
|
||
*** New language Go
|
||
Names of packages, functions, and types are tagged.
|
||
|
||
*** Improved support for Lua
|
||
|
||
Etags now tags functions even if the "function" keyword follows some
|
||
whitespace at line beginning.
|
||
|
||
|
||
* Changes in Emacs 25.1 on Non-Free Operating Systems
|
||
|
||
** MS-Windows specific Emacs build scripts are no longer in the distribution.
|
||
This includes the makefile.w32-in files in various subdirectories, and
|
||
the support files. The file nt/configure.bat now just tells the user
|
||
to use the procedure described in nt/INSTALL, by running the Posix
|
||
'configure' script in the top-level directory.
|
||
|
||
** Building Emacs for MS-Windows requires at least Windows XP
|
||
or Windows Server 2003. The built binaries still run on all versions
|
||
of Windows starting with Windows 9X.
|
||
|
||
** Emacs running on MS-Windows now supports the daemon mode.
|
||
|
||
** The byte counts in etags-generated TAGS files are now the same on
|
||
MS-Windows as they are on other platforms.
|
||
|
||
** On macOS, configure creates a Cocoa ("Nextstep") build by default.
|
||
Pass '--without-ns' to configure to create an X11 build, the old default.
|
||
|
||
** Mac OS X 10.5 or older is no longer supported.
|
||
|
||
** Mac OS X on PowerPC is no longer supported.
|
||
|
||
** New variable 'ns-use-fullscreen-animation' controls animation for
|
||
non-native NS fullscreen. The default is nil. Set to t to enable
|
||
animation when entering and leaving fullscreen. For native macOS
|
||
fullscreen this has no effect.
|
||
|
||
** On the macOS Cocoa ("Nextstep") port, multicolor font (such as color
|
||
emoji) display is disabled. This feature was accidentally added when
|
||
Emacs 24.4 included the new Core Text based font backend code that was
|
||
originally implemented for a non-mainline port. This will be enabled
|
||
again once it is also implemented in Emacs on free operating systems.
|
||
If some symbols, such as emoji, do not display, we suggest to install
|
||
an appropriate font, such as Symbola; then they will be displayed,
|
||
albeit without the color effects.
|
||
|
||
** The new function 'w32-application-type' returns the type of an
|
||
MS-Windows application given the name of its executable program file.
|
||
|
||
** New variable 'w32-pipe-buffer-size'.
|
||
It can be used to tune the size of the buffer of pipes created for
|
||
communicating with subprocesses, when the program run by a subprocess
|
||
exhibits unusual buffering behavior. Default is zero, which lets the
|
||
OS use its default size.
|
||
|
||
|
||
----------------------------------------------------------------------
|
||
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: us-ascii
|
||
mode: outline
|
||
paragraph-separate: "[ ]*$"
|
||
end:
|