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;;; colorscheme.el --- Syntax highlight and friends -*- lexical-binding: t -*-
;; Author: William Carroll <wpcarro@gmail.com>
;;; 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:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Dependencies
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(require 'cycle)
(require 'general)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Constants
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defcustom colorscheme/install-kbds? t
"If non-nil, enable the keybindings.")
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Library
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(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
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