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;;; jao-buffers.el --- utilities to deal with buffers and windows -*- lexical-binding: t; -*-
;; Copyright (C) 2026 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <mail@jao.io>
;; Keywords: files
;; 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/>.
;;; Commentary:
;;
;;; Code:
;;;; attached buffers
(defun jao-display-buffer-below-selected (buffer alist)
(delete-other-windows-vertically)
(display-buffer-below-selected buffer alist))
(defun jao-display-below-eldoc (buffer alist)
(let ((w (selected-window)))
(pop-to-buffer "*eldoc*" nil t)
(jao-display-buffer-below-selected buffer alist)
(select-window w t)))
(defun jao-attached-buffer-entry (name-rx height)
`(,name-rx (display-buffer-reuse-window
jao-display-buffer-below-selected)
(window-height . ,(or height 25))))
;;;###autoload
(defmacro jao-with-attached-buffer (name-rx height &rest body)
(declare (indent defun))
`(let ((display-buffer-alist '(,(jao-attached-buffer-entry name-rx height))))
,@body))
;;;###autoload
(defun jao-define-attached-buffer (name-rx &optional height)
(add-to-list 'display-buffer-alist
(jao-attached-buffer-entry name-rx height)))
;;;###autoload
(defun jao-buffer-same-mode (&optional mode pre-fn switch-fn)
(interactive)
(let* ((mode (or mode major-mode))
(modes (if (symbolp mode) (list mode) mode))
(pred `(lambda (b)
(let ((b (get-buffer (if (consp b) (car b) b))))
(member (buffer-local-value 'major-mode b)
',modes))))
(buff (read-buffer "Buffer: " nil t pred)))
(when pre-fn (funcall pre-fn))
(if switch-fn (funcall switch-fn buff) (switch-to-buffer buff))))
;;;###autoload
(defun jao-buffer-same-mode-cmd (&optional pop)
(interactive "P")
(jao-buffer-same-mode nil nil (and pop #'pop-to-buffer)))
(provide 'jao-buffers)
;;; jao-buffers.el ends here
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