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;;; -*- lexical-binding: t; -*-
;;; Window placement
;;; TODO: Test popper.el.
(global-set-key (kbd "C-`") #'window-toggle-side-windows)
(global-set-key (kbd "M-`") #'kj/popup-toggle-override)
(setq window-sides-slots '(0 0 2 2))  ; 2 right side windows
(setq switch-to-buffer-obey-display-actions t)
(setq switch-to-buffer-in-dedicated-window 'pop)

(defvar kj/popup-override nil)

(defun kj/popup-clear-overrides ()
  (interactive)
  (dolist (buffer (buffer-list))
    (with-current-buffer buffer
      (kill-local-variable 'kj/popup-override))))

(defun kj/popup-toggle-override ()
  (interactive)
  (if (local-variable-p 'kj/popup-override)
      (kill-local-variable 'kj/popup-override)
    (setq-local kj/popup-override
                (not (kj/popup-buffer-base (buffer-name)))))
  (let ((buffer (buffer-name)))
    (switch-to-prev-buffer)
    (switch-to-buffer buffer)))

(defun kj/popup-buffer-base (buffer &optional condition)
  (or
   (s-matches-p
    (rx (| "*Help*"
           "*info*"
           (seq "*scratch*")
           (seq "*Messages*")
           (seq "*Warnings*")
           (seq "*Backtrace*")
           (seq "*eldoc " (* anything) "*")
           (seq "*WoMan " (* anything) "*")
           (seq "*man " (* anything) "*")
           (seq "fig: " (* anything))
           (seq "*htop*" (* anything))
           (seq "*Proced*" (* anything))
           (seq "*eshell*" (* anything))
           (seq "*shell*" (* anything))
           "*Occur*")) buffer)
   (with-current-buffer buffer
     (apply #'derived-mode-p
            '(magit-mode
              compilation-mode
              shell-mode
              comint-mode
              Custom-mode       ; For customization
              fig-commit-mode)))))

(defun kj/popup-buffer (buffer &optional condition)
  (with-current-buffer buffer
    (if (local-variable-p 'kj/popup-override)
        kj/popup-override
      (kj/popup-buffer-base buffer condition))))

(setq transient-display-buffer-action
      '(display-buffer-in-best-side
        (slot . 1)
        (inhibit-same-window . t)
        (window-parameters
         (no-other-window . t))))

(defun display-buffer-in-best-side (buffer alist)
  (display-buffer-in-side-window
   buffer
   (append (if (> (frame-width) 160)
               '((side . right)
                 (window-width . 85))
             '((side . bottom)
               (window-height . 0.5)))
           alist)))

(add-to-list 'display-buffer-alist
             `(kj/popup-buffer
               (display-buffer-in-best-side)
               (slot . 0)))

(provide 'kj-popup)