Elvince: /* child-frames provide an alternate way to prompt the user or display information */

2019-07-30T08:26:37Z

child-frames provide an alternate way to prompt the user or display information

Elvince: child-frames

2019-07-30T08:25:39Z

child-frames

Elvince: Emacs 26.1

2019-07-30T08:13:35Z

Emacs 26.1

New page

https://www.gnu.org/savannah-checkouts/gnu/emacs/emacs.html#Releases

= What's new in Emacs 26 =

== Emacs now provides a limited form of concurrency with Lisp threads. ==

Emacs now provides a limited form of concurrency with Lisp threads.
Concurrency in Emacs Lisp is "mostly cooperative", meaning that
Emacs will only switch execution between threads at well-defined
times: when Emacs waits for input, during blocking operations related
to threads (such as mutex locking), or when the current thread
explicitly yields. Global variables are shared among all threads, but
a 'let' binding is thread-local. Each thread also has its own current
buffer and its own match data.

See the chapter "(elisp) Threads" in the ELisp manual for full
documentation of these facilities.

== Flymake has been completely redesigned ==

Flymake now annotates arbitrary buffer regions, not just lines. It
supports arbitrary diagnostic types, not just errors and warnings (see
variable 'flymake-diagnostic-types-alist').

It also supports multiple simultaneous backends, meaning that you can
check your buffer from different perspectives (see variable
'flymake-diagnostic-functions'). Backends for Emacs Lisp mode are
provided.

The old Flymake behavior is preserved in the so-called "legacy
backend", which has been updated to benefit from the new UI features.

(note: see Flycheck)

== Emacs now uses double buffering to reduce flicker on the X Window System ==

== A systemd user unit file is provided ==

== Support for 24-bit colors on capable text terminals ==

== The networking code has been reworked so that it's more asynchronous ==

The networking code has been reworked so that it's more
asynchronous than it was (when specifying :nowait t in
'make-network-process'). How asynchronous it is varies based on the
capabilities of the system, but on a typical GNU/Linux system the DNS
resolution, the connection, and (for TLS streams) the TLS negotiation
are all done without blocking the main Emacs thread. To get
asynchronous TLS, the TLS boot parameters have to be passed in (see
the manual for details).

Certain process oriented functions (like 'process-datagram-address')
will block until socket setup has been performed. The recommended way
to deal with asynchronous sockets is to avoid interacting with them
until they have changed status to "run". This is most easily done
from a process sentinel.

== Emacs can scroll horizontally using mouse, touchpad, and trackbar ==

You can enable this by customizing 'mouse-wheel-tilt-scroll'. If you
want to reverse the direction of the scroll, customize
'mouse-wheel-flip-direction'.

== Emacs now supports optional display of line numbers in the buffer. ==

This is similar to what 'linum-mode' provides, but much faster and
doesn't usurp the display margin for the line numbers. Customize the
buffer-local variable 'display-line-numbers' to activate this optional
display. Alternatively, you can use the 'display-line-numbers-mode'
minor mode or the global 'global-display-line-numbers-mode'. When
using these modes, customize 'display-line-numbers-type' with the same
value as you would use with 'display-line-numbers'.

== The 'occur' command can now operate on the region ==

(but don't miss the awesome helm-occur, swoop and helm-swoop packages)

== Emacs no longer prompts about editing a changed file when the file's content is unchanged ==

Instead of only checking the modification time,
Emacs now also checks the file's actual content before prompting the user.

== File local and directory local variables are now initialized each time the major mode is set ==

not just when the file is first visited.
These local variables will thus not vanish on setting a major mode.

== A second dir-local file (.dir-locals-2.el) is now accepted ==

== Connection-local variables can be used to specify local variables ==

with a value depending on the connected remote server

== 'switch-to-buffer-preserve-window-point' now defaults to t ==

Applications that call 'switch-to-buffer' and want to show the buffer at
the position of its point should use 'pop-to-buffer-same-window' in lieu
of 'switch-to-buffer'.

== Emacsclient has a new option '-T' / '--tramp' ==

This helps with using a local Emacs session as the server for a remote
emacsclient. With appropriate setup, one can now set the EDITOR
environment variable on a remote machine to emacsclient, and
use the local Emacs to edit remote files via Tramp. See the node
"(emacs) emacsclient Options" in the user manual for the details.

== Changes in packages and specialized modes ==

=== Org-mode ===

* Emacs 26.1 comes with Org v9.1.6.

=== Dired ===

* You can answer 'all' in 'dired-do-delete' to delete recursively all remaining directories without more prompts

* Dired supports wildcards in the directory part of the file names.

(no more need of find-name-dired for simple globbing)

* Users can now customize mouse clicks in Dired in a more flexible way.

The new command 'dired-mouse-find-file' can be bound to a mouse click
and used to visit files/directories in Dired in the selected window.
The new command 'dired-mouse-find-file-other-frame' similarly visits
files/directories in another frame. You can write your own commands
that invoke 'dired-mouse-find-file' with non-default optional
arguments, to tailor the effects of mouse clicks on file names in
Dired buffers.

* In wdired, when editing files to contain slash characters,
the resulting directories are automatically created

* 'W' is now bound to 'browse-url-of-dired-file', and is useful for
viewing HTML files and the like

=== Compilation mode ===

In compilation mode, Messages from CMake are now recognized.

=== Emacs Web Browser (EWW) ===

* New 'M-RET' command for opening a link at point in a new eww buffer.

* A new 's' command for switching to another eww buffer via the minibuffer.

* A new command 'C' ('eww-toggle-colors') can be used to toggle
whether to use the HTML-specified colors or not. The user can also
customize the 'shr-use-colors' variable.

=== Images ===

A new library for creating and manipulating SVG images has been
added. See the "(elisp) SVG Images" section in the ELisp reference
manual for details.

=== Image-dired ===

Thumbnail generation is now asynchronous.

=== Tramp ===

==== Access to Google Drive ====

New connection method "gdrive", which allows access to Google
Drive onsite repositories.

=== Prog mode ===

Prog mode has some support for multi-mode indentation.
This allows better indentation support in modes that support multiple
programming languages in the same buffer, like literate programming
environments or ANTLR programs with embedded Python code.

=== Enchant is now supported as a spell-checker ===

Enchant is a meta-spell-checker that uses providers such as Hunspell
to do the actual checking. With it, users can use spell-checkers not
directly supported by Emacs, such as Voikko, Hspell and AppleSpell,
more easily share personal word-lists with other programs, and
configure different spelling-checkers for different languages.
(Version 2.1.0 or later of Enchant is required.)

= See more =

For a full review of what's new in Emacs 26: https://www.masteringemacs.org/article/whats-new-in-emacs-26-1

See the NEWS file here: https://www.gnu.org/savannah-checkouts/gnu/emacs/news/NEWS.26.1

@@ Line 45: / Line 45: @@
 * https://github.com/casouri/eldoc-box
 * https://github.com/alexmurray/flycheck-posframe
 * https://www.gnu.org/software/emacs/manual/html_node/elisp/Child-Frames.html#Child-Frames
 * https://with-emacs.com/posts/frog-menu/catch-flyspell-errors-using-frog-menus/

← Older revision		Revision as of 08:25, 30 July 2019
Line 38:		Line 38:

	== Support for 24-bit colors on capable text terminals ==		== Support for 24-bit colors on capable text terminals ==
		+
		+	== child-frames provide an alternate way to prompt the user or display information ==
		+
		+	see packages like
		+
		+	* https://github.com/casouri/eldoc-box
		+	* https://github.com/alexmurray/flycheck-posframe
		+	* https://www.gnu.org/software/emacs/manual/html_node/elisp/Child-Frames.html#Child-Frames
		+	* https://with-emacs.com/posts/frog-menu/catch-flyspell-errors-using-frog-menus/

	== The networking code has been reworked so that it's more asynchronous ==		== The networking code has been reworked so that it's more asynchronous ==

GNU Emacs 26 - Revision history

Elvince: /* child-frames provide an alternate way to prompt the user or display information */

Elvince: child-frames

Elvince: Emacs 26.1