tvl-depot/emacs/.emacs.d/wpc/colorscheme.el

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;;; colorscheme.el --- Syntax highlight and friends -*- 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:
;;
;; TODO: Clarify this.
;; Since I have my own definition of "theme", which couples wallpaper, font,
;; with Emacs's traditional notion of the word "theme", I'm choosing to use
;; "colorscheme" to refer to *just* the notion of syntax highlight etc.
;;; Code:
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;; Dependencies
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(require 'cycle)
(require 'general)
(require '>)
(require 'cl-macs)
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;; Constants
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(defcustom colorscheme-install-kbds? t
"If non-nil, enable the keybindings.")
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;; Library
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(defcustom colorscheme-whitelist
(cycle-from-list
(->> (custom-available-themes)
(list-map #'symbol-name)
(list-filter (>-> (s-starts-with? "doom-")))
(list-map #'intern)))
"The whitelist of colorschemes through which to cycle.")
(defun colorscheme-current ()
"Return the currently enabled colorscheme."
(cycle-current colorscheme-whitelist))
(defun colorscheme-disable-all ()
"Disable all currently enabled colorschemes."
(interactive)
(->> custom-enabled-themes
(list-map #'disable-theme)))
(defun colorscheme-set (theme)
"Call `load-theme' with `THEME', ensuring that the line numbers are bright.
There is no hook that I'm aware of to handle this more elegantly."
(load-theme theme t)
(prelude-set-line-number-color "#da5468"))
(defun colorscheme-whitelist-set (colorscheme)
"Focus the COLORSCHEME in the `colorscheme-whitelist' cycle."
(cycle-focus (lambda (x) (equal x colorscheme)) colorscheme-whitelist)
(colorscheme-set (colorscheme-current)))
(defun colorscheme-ivy-select ()
"Load a colorscheme using ivy."
(interactive)
(let ((theme (ivy-read "Theme: " (cycle-to-list colorscheme-whitelist))))
(colorscheme-disable-all)
(colorscheme-set (intern theme))))
(cl-defun colorscheme-cycle (&key forward?)
"Cycle next if `FORWARD?' is non-nil.
Cycle prev otherwise."
(disable-theme (cycle-current colorscheme-whitelist))
(let ((theme (if forward?
(cycle-next colorscheme-whitelist)
(cycle-prev colorscheme-whitelist))))
(colorscheme-set theme)
(message (s-concat "Active theme: " (symbol-to-string theme)))))
(defun colorscheme-next ()
"Disable the currently active theme and load the next theme."
(interactive)
(colorscheme-cycle :forward? t))
(defun colorscheme-prev ()
"Disable the currently active theme and load the previous theme."
(interactive)
(colorscheme-cycle :forward? nil))
;; Keybindings
(when colorscheme-install-kbds?
(general-define-key
:prefix "<SPC>"
:states '(normal)
"Ft" #'colorscheme-next
"Pt" #'colorscheme-prev))
(provide 'colorscheme)
;;; colorscheme.el ends here