create library "best-side-window"

lisp/best-side-window/best-side-window.el

@@ -0,0 +1,52 @@
+;;; best-side-window.el ---                          -*- lexical-binding: t; -*-
+
+;; Copyright John Turner (C) 2023  
+
+;; Author: John Turner
+
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+(require 'cl-lib)
+
+(defgroup best-side-window nil "Select ideal side to display buffer")
+
+(defcustom -default-side 'bottom
+  "Default side to display buffer if -choose-best-side-functions fails to choose a side")
+
+(defcustom -choose-best-side-functions nil
+  "The first non-nil return value will be used as the side to use for display buffer")
+
+(defun -best-side ()
+  (cl-loop for f in -choose-best-side-functions
+           for result = (funcall f)
+           if result
+           return result))
+
+(defun -display-buffer-in-best-side-window (buffer alist)
+  (let ((side (or (-best-side) -default-side)))
+    (display-buffer-in-side-window buffer (cons (cons 'side side) alist))))
+
+(defun -bottom-when-frame-split ()
+  (if (< (frame-pixel-width) (/ (display-pixel-width) 2))
+      'bottom
+    -default-side))
+
+(add-to-list '-choose-best-side-functions '-bottom-when-frame-split)
+  
+(provide 'best-side-window)
+;;; best-side-window.el ends here
+
+;; Local Variables:
+;; read-symbol-shorthands: (("-" . "best-side-window-"))
+;; End: