Emacs 29 (date 2023)

Emacs NEWS Files

• Emacs NEWS.29
• emacs_NEWS.29.txt

Keybinding Functions Change

• Emacs Keys: Keybinding Functions, Emacs 29 Change

Emoji

New commands for inserting Emoji. They have Ctrl+x 8 e prefix key.

• Emacs: Insert Emoji

describe-mode now shows minor modes list to bottom

describe-mode now shows global minor modes list to bottom.

help-mode now shows keybinding in monospace font and with border.

by default on Microsoft Windows, the monospace font used is bitmap courier. very ugly.

• Emacs Init: Change Default Face (Font)

new variable major-mode-remap-alist , now easier to remap modes.

• Emacs Init: Set Default Major Mode

help-enable-variable-value-editing

when t, you can edit variable value when using describe-variable.

to edit, press e at the value point.

(setq help-enable-variable-value-editing t)

Alt+x help-quick shows a cheatsheet of keys.

help buffer, type i to jump to emacs/elisp manual e.g. Alt+x describe-function dired, then press i.

Emacs 29 Byte Compile Unescaped Single Quote Warning

• Emacs: Byte Compile Unescaped Single Quote Warning

tree-sitter

• tree-sitter is now part of emacs. it's a parser for text editors. https://tree-sitter.github.io/tree-sitter/

you have to install grammar files.

new modes using tree-sitter:

• typescript-ts-mode
• tsx-ts-mode
• c-ts-mode
• c++-ts-mode
• java-ts-mode
• python-ts-mode
• css-ts-mode
• json-ts-mode
• csharp-ts-mode
• bash-ts-mode
• dockerfile-ts-mode
• cmake-ts-mode
• toml-ts-mode
• go-ts-mode
• go-mod-ts-mode
• yaml-ts-mode
• rust-ts-mode
• ruby-ts-mode

Eglot Interface for Language Server Protocol (LSP)

Eglot package is now part of emacs. eglot. this is mostly for emacs lisp coders to write major modes using LSP.

author is João Távora (aka joaotavora) https://github.com/joaotavora/eglot

misc notes

• use-package now is part of emacs. it is for managing config for packages.

• new functions, for installing packages directly.
• package-vc-install
• package-vc-update
• package-vc-update-all

• new sqlite-mode. works with SQLite database.

• new option -x to run elisp script, sans loading init.
• new option --init-directory

• view image now support webp format
• emacs now support multi-touch touchpads, such as on laptop.

• xtodo
  merge
• Emacs: Command Line Options
• Elisp: Run Elisp Script in Terminal

• tree-sitter, a fantastic thing, i'll be spending time on it in coming months.
• https://tree-sitter.github.io/tree-sitter/

here's some collection of articles related to it.

• Computer Languages Syntax Parsing for Editor

misc notes

composition-break-at-point

variable. If true, prevent auto-composition of characters around cursor.

This means you can edit composed unicode chars such as emoji with skin color. e.g. Unicode: Variation Selector

(setq composition-break-at-point t)

switch-to-prev-buffer-skip-regexp

Buffers that switch-to-prev-buffer and switch-to-next-buffer should skip. new in emacs 29.

• xah-next-user-buffer

• ** New function define-keymap.
• This function allows defining a number of keystrokes with one form.

• ** New macro defvar-keymap.
• This macro allows defining keymap variables more conveniently.

• ** defvar-keymap can specify repeat-mode behavior for the keymap.
• Use :repeat t to have all bindings be repeatable or for more advanced usage: