1 files changed, 96 insertions, 0 deletions
diff --git a/emacs/.emacs.d/wpc/colorscheme.el b/emacs/.emacs.d/wpc/colorscheme.el
new file mode 100644
index 000000000000..830fc5ac3e28
--- /dev/null
+++ b/emacs/.emacs.d/wpc/colorscheme.el
@@ -0,0 +1,96 @@
+;;; 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