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;;; fonts.el --- Font preferences -*- lexical-binding: t -*-
;; Author: William Carroll <wpcarro@gmail.com>
;; Version: 0.0.1
;; URL: https://git.wpcarro.dev/wpcarro/briefcase
;; Package-Requires: ((emacs "24.3"))
;;; Commentary:
;; Control my font preferences with ELisp.
;;; Code:
;; TODO: `defcustom' font-size.
;; TODO: `defcustom' fonts.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Dependencies
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'prelude)
(require 'cycle)
(require 'device)
(require 'maybe)
(require 'cl-lib)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Constants
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TODO: Troubleshoot why "8" appears so large on my desktop.
;; TODO: Consider having a different font size when I'm using my 4K monitor.
(defconst fonts-size
(pcase (device-classify)
('work-laptop "10")
('work-desktop "8"))
"My preferred default font-size, which is device specific.")
(defconst fonts-size-step 10
"The amount (%) by which to increase or decrease a font.")
(defconst fonts-hacker-news-recommendations
'("APL385 Unicode"
"Go Mono"
"Sudo"
"Monoid"
"Input Mono Medium" ;; NOTE: Also "Input Mono Thin" is nice.
)
"List of fonts optimized for programming I found in a HN article.")
(defconst fonts-whitelist
(cycle-from-list
(list-concat
fonts-hacker-news-recommendations
'("JetBrainsMono"
"Mononoki Medium"
"Monospace"
"Operator Mono Light"
"Courier"
"Andale Mono"
"Source Code Pro"
"Terminus")))
"This is a list of my preferred fonts.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Functions
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; TODO: fonts and fonts-whitelist make it difficult to name functions like
;; fonts-set as a generic Emacs function vs choosing a font from the whitelist.
(cl-defun fonts-cycle (&key forward?)
"Cycle forwards when `FORWARD?' non-nil."
(let ((font (if forward?
(cycle-next fonts-whitelist)
(cycle-prev fonts-whitelist))))
(message (s-concat "Active font: " font))
(fonts-set font)))
(defun fonts-next ()
"Quickly cycle through preferred fonts."
(interactive)
(fonts-cycle :forward? t))
(defun fonts-prev ()
"Quickly cycle through preferred fonts."
(interactive)
(fonts-cycle :forward? nil))
(defun fonts-set (font &optional size)
"Change the font to `FONT' with option integer, SIZE, in pixels."
(if (maybe-some? size)
(set-frame-font (string-format "%s %s" font size) nil t)
(set-frame-font font nil t)))
(defun fonts-whitelist-set (font)
"Focuses the FONT in the `fonts-whitelist' cycle.
The size of the font is determined by `fonts-size'."
(prelude-assert (cycle-contains? font fonts-whitelist))
(cycle-focus (lambda (x) (equal x font)) fonts-whitelist)
(fonts-set (fonts-current) fonts-size))
(defun fonts-ivy-select ()
"Select a font from an ivy prompt."
(interactive)
(fonts-whitelist-set
(ivy-read "Font: " (cycle-to-list fonts-whitelist))))
(defun fonts-print-current ()
"Message the currently enabled font."
(interactive)
(message
(string-format "[fonts] Current font: \"%s\""
(fonts-current))))
(defun fonts-current ()
"Return the currently enabled font."
(cycle-current fonts-whitelist))
(defun fonts-increase-size ()
"Increase font size."
(interactive)
(->> (face-attribute 'default :height)
(+ fonts-size-step)
(set-face-attribute 'default (selected-frame) :height)))
(defun fonts-decrease-size ()
"Decrease font size."
(interactive)
(->> (face-attribute 'default :height)
(+ (- fonts-size-step))
(set-face-attribute 'default (selected-frame) :height)))
(defun fonts-reset-size ()
"Restore font size to its default value."
(interactive)
(fonts-whitelist-set (fonts-current)))
(defun fonts-enable-ligatures ()
"Call this function to enable ligatures."
(interactive)
(let ((alist '((33 . ".\\(?:\\(?:==\\|!!\\)\\|[!=]\\)")
(35 . ".\\(?:###\\|##\\|_(\\|[#(?[_{]\\)") ;;
(36 . ".\\(?:>\\)")
(37 . ".\\(?:\\(?:%%\\)\\|%\\)")
(38 . ".\\(?:\\(?:&&\\)\\|&\\)")
(42 . ".\\(?:\\(?:\\*\\*/\\)\\|\\(?:\\*[*/]\\)\\|[*/>]\\)") ;;
(43 . ".\\(?:\\(?:\\+\\+\\)\\|[+>]\\)")
(45 . ".\\(?:\\(?:-[>-]\\|<<\\|>>\\)\\|[<>}~-]\\)")
(46 . ".\\(?:\\(?:\\.[.<]\\)\\|[.=-]\\)") ;;
(47 . ".\\(?:\\(?:\\*\\*\\|//\\|==\\)\\|[*/=>]\\)")
(48 . ".\\(?:x[a-zA-Z]\\)")
(58 . ".\\(?:::\\|[:=]\\)")
(59 . ".\\(?:;;\\|;\\)")
(60 . ".\\(?:\\(?:!--\\)\\|\\(?:~~\\|->\\|\\$>\\|\\*>\\|\\+>\\|--\\|<[<=-]\\|=[<=>]\\||>\\)\\|[*$+~/<=>|-]\\)")
(61 . ".\\(?:\\(?:/=\\|:=\\|<<\\|=[=>]\\|>>\\)\\|[<=>~]\\)")
(62 . ".\\(?:\\(?:=>\\|>[=>-]\\)\\|[=>-]\\)")
(63 . ".\\(?:\\(\\?\\?\\)\\|[:=?]\\)")
(91 . ".\\(?:]\\)")
(92 . ".\\(?:\\(?:\\\\\\\\\\)\\|\\\\\\)")
(94 . ".\\(?:=\\)")
(119 . ".\\(?:ww\\)")
(123 . ".\\(?:-\\)")
(124 . ".\\(?:\\(?:|[=|]\\)\\|[=>|]\\)")
(126 . ".\\(?:~>\\|~~\\|[>=@~-]\\)"))))
(dolist (char-regexp alist)
(set-char-table-range composition-function-table (car char-regexp)
`([,(cdr char-regexp) 0 font-shape-gstring])))))
(provide 'fonts)
;;; fonts.el ends here
|
