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#+title: Emacs User Interface
* Theming
Set up Source Code Pro with Nerd Font patches as default font and Computer Modern as a variable pitch font.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(defvar jj/mono-font)
(defvar jj/var-font)
(pcase system-type
(`gnu/linux
(when (eq (system-name) "gentoo"))
(setq jj/mono-font "SauceCodePro Nerd Font-11")
(setq jj/var-font "CMU Serif-14"))
(`darwin
(setq jj/mono-font "SauceCodePro Nerd Font-14:weight=thin")
(setq jj/var-font "CMU Serif-18")))
(add-to-list 'default-frame-alist
`(font . ,jj/mono-font))
#+end_src
Use my custom Doom Disco light theme.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package doom-themes
:straight (doom-themes :type git :host github :repo "doomemacs/themes"
:fork (:host github
:repo "JacobJanzen/emacs-doom-themes"))
:config
(setq doom-themes-enable-bold t
doom-themes-enable-italic t)
(load-theme 'doom-disco t)
(doom-themes-org-config))
(add-to-list 'default-frame-alist '(alpha-background . 90))
#+end_src
Use =doom-modeline= for a nicer modeline.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package doom-modeline
:init (doom-modeline-mode 1))
#+end_src
Remove the title bar.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(add-to-list 'default-frame-alist '(undecorated . t))
#+end_src
* Clean UI
Disable the Emacs start screen and make the =scratch= buffer default to empty.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(setq inhibit-startup-screen t)
(setq initial-scratch-message nil)
#+end_src
Disable scroll bar, tool bar, and menu bar.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(scroll-bar-mode -1)
(tool-bar-mode -1)
(menu-bar-mode -1)
#+end_src
* Fancy Stuff
Use line numbers by default.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(global-display-line-numbers-mode 1)
#+end_src
Highlight changes for an operation with =evil-goggles=.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package evil-goggles
:after evil
:config
(evil-goggles-mode)
(evil-goggles-use-diff-faces))
#+end_src
Install nerd font icons.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package nerd-icons)
#+end_src
Scroll one line at a time.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(setq scroll-conservatively most-positive-fixnum)
#+end_src
Create parent directories when they don't yet exist.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(defun jj/create-non-existent-directory ()
(let ((parent-directory (file-name-directory buffer-file-name)))
(when (and (not (file-exists-p parent-directory))
(y-or-n-p (format "Directory `%s' does not exist! Create it?" parent-directory)))
(make-directory parent-directory t))))
(add-to-list 'find-file-not-found-functions #'jj/create-non-existent-directory)
#+end_src
* Whitespace Management
Use spaces over tabs and set tab width to 4.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(setq-default indent-tabs-mode nil)
(setq tab-width 4
c-basic-offset tab-width)
#+end_src
Delete trailing whitespace on save.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(defun jj/before-save-hook ()
(unless (eql (with-current-buffer (current-buffer) major-mode)
'markdown-mode)
(delete-trailing-whitespace)))
(add-hook 'before-save-hook #'jj/before-save-hook)
#+end_src
* Backup Management
Don't create backup files.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(setq make-backup-files nil)
#+end_src
* Customize =dired=
Use nerd font icons in =dired=.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package nerd-icons-dired
:hook (dired-mode . nerd-icons-dired-mode))
#+end_src
Use colours in =dired= with =diredfl=.
#+begin_src emacs-lisp :tangle ~/.config/emacs/user-interface.el :mkdirp yes
(use-package diredfl
:init (diredfl-global-mode 1))
#+end_src
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