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;;; jao-minibuffer.el --- using the minibuffer to report status -*- lexical-binding: t; -*-
;; Copyright (C) 2020 jao
;; Author: jao <mail@jao.io>
;; Keywords: extensions
;; 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:
;; Simple asynchronous display of information in the minibuffer.
;;; Code:
(defvar jao-minibuffer-info ())
(defvar jao-minibuffer-align-right-p t)
(defvar jao-minibuffer-right-margin 2)
(defconst jao-minibuffer--name " *Minibuf-0*")
(defun jao-minibuffer--trim (s w)
(if (<= (length s) w)
(format (format "%%%ds" w) s)
(substring s 0 w)))
(defun jao-minibuffer--aligned (&optional w)
(let ((msg (format-mode-line jao-minibuffer-info)))
(when (not (string-empty-p msg))
(if jao-minibuffer-align-right-p
(let* ((mw (window-width (minibuffer-window)))
(w (- mw (or w 0) jao-minibuffer-right-margin)))
(if (> w 0) (jao-minibuffer--trim msg w) ""))
(concat " · " msg)))))
(defun jao-minibuffer--message (old-func &rest args)
(let ((msg (let ((inhibit-message t)) (apply old-func args))))
(when (not inhibit-message)
(let ((message-log-max nil)
(new-msg (concat msg (jao-minibuffer--aligned (length msg)))))
(funcall old-func "%s" new-msg)))
msg))
(advice-add #'message :around #'jao-minibuffer--message)
;;;###autoload
(defun jao-minibuffer-refresh ()
(interactive "")
(with-current-buffer jao-minibuffer--name
(erase-buffer)
(insert (jao-minibuffer--aligned))))
;;;###autoload
(defun jao-minibuffer-add-variable (variable-name &optional append)
(add-to-list 'jao-minibuffer-info `(:eval ,variable-name) append))
(provide 'jao-minibuffer)
;;; jao-minibuffer.el ends here
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