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;;; jao-minibuffer.el --- using the minibuffer to report status -*- lexical-binding: t; -*-
;; Copyright (C) 2020, 2021, 2022 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 and echo area.
;;; Code:
(defvar jao-minibuffer-info ())
(defvar jao-minibuffer-msg-info '(""))
(defvar jao-minibuffer-align-right-p t)
(defvar jao-minibuffer-right-margin (if window-system "" " "))
(defvar jao-minibuffer-maximized-frames-p t)
(defvar jao-minibuffer-frame-width nil)
(defvar jao-minibuffer-active-buffer-line-color "azure4")
(defvar jao-minibuffer-inactive-buffer-line-color "grey25")
(defconst jao-minibuffer--name " *Minibuf-0*")
(defvar jao-minibuffer--overlays nil)
(defun jao-minibuffer--create-overlays ()
(dolist (buf '(" *Echo Area 0*" " *Echo Area 1*"))
(with-current-buffer buf
(remove-overlays (point-min) (point-max))
(push (make-overlay (point-min) (point-max) nil nil t)
jao-minibuffer--overlays))))
(defun jao-minibuffer--remove-overlays ()
(mapc 'delete-overlay jao-minibuffer--overlays)
(setq jao-minibuffer--overlays nil))
(defun jao-minibuffer--set-overlays (txt)
(let* ((wid (+ (string-width txt)))
(align `(space :align-to (- right-fringe ,wid)))
(spc (propertize " " 'cursor 1 'display align))
(txt (concat spc txt)))
;; Remove any dead overlays from the minibuffer from the beginning of the list
(while (null (overlay-buffer (car jao-minibuffer--overlays)))
(pop jao-minibuffer--overlays))
;; Add the correct text to each echo bar overlay
(dolist (o jao-minibuffer--overlays)
(when (overlay-buffer o) (overlay-put o 'after-string txt)))))
(defun jao-minibuffer--trim (s w)
(if (<= (string-width (or s "")) w)
(format (format "%%%ds" (if jao-minibuffer-align-right-p w (- w))) s)
(substring s 0 w)))
(defun jao-minibuffer--width ()
(cond ((numberp jao-minibuffer-frame-width) jao-minibuffer-frame-width)
(jao-minibuffer-maximized-frames-p (frame-width))
(t (min (frame-width) (window-width (minibuffer-window))))))
(defun jao-minibuffer--format-info (&optional info)
(mapconcat 'string-trim
(seq-filter (lambda (s) (not (string-blank-p s)))
(mapcar 'format-mode-line
(if jao-minibuffer-align-right-p
(or info jao-minibuffer-info)
(reverse (or info jao-minibuffer-info)))))
" "))
(defun jao-minibuffer--aligned (&optional w msg)
(let* ((msg (or msg (jao-minibuffer--format-info)))
(msg (cond (jao-minibuffer-align-right-p (string-trim msg))
(t (string-trim-left msg))))
(msg (propertize msg :minibuffer-message t)))
(unless (string-empty-p msg)
(let* ((mw (jao-minibuffer--width))
(w (- mw (mod w mw) (string-width jao-minibuffer-right-margin) -1)))
(if (> w 0) (jao-minibuffer--trim msg w) "")))))
(defun jao-minibuffer--insert (msg)
(let ((hack (derived-mode-p 'pdf-view-mode 'doc-view-mode)))
(with-current-buffer jao-minibuffer--name
(delete-region (point-min) (point-max))
(insert msg)
(when hack (other-window 1) (other-window -1)))))
(defun jao-minibuffer--strip-prev (msg)
(if-let* ((l (length msg))
(n (text-property-any 0 l :minibuffer-message t msg)))
(string-trim (substring msg 0 n))
msg))
(defvar exwm-class-name nil)
(defvar jao-minibuffer--mode-line-position
'(exwm-class-name
("")
("%n %2c %l " (:eval (format "%d" (line-number-at-pos (point-max)))))))
(defvar jao-minibuffer--mode-line-bid
'(:eval (cond ((derived-mode-p 'gnus-group-mode
'gnus-article-mode
'gnus-summary-mode)
mode-line-buffer-identification)
((derived-mode-p 'circe-channel-mode)
(format "%s [%d]" (buffer-name) (length (circe-channel-nicks))))
(t "%b"))))
(defvar jao-minibuffer--mode-line-format
`("%[" (:propertize ,jao-minibuffer--mode-line-bid face jao-themes-f00) "%]"
(:propertize " (" face jao-themes-dimm)
(:propertize mode-name face jao-themes-f00)
(:propertize ("" minor-mode-alist) face jao-themes-f11)
(:propertize ")" face jao-themes-dimm)
(:propertize (vc-mode vc-mode) face jao-themes-f10)
(:propertize mode-line-position face jao-themes-f12)
" "
global-mode-string
(:propertize (" %Z%*%+ " (current-input-method current-input-method-title))
face jao-themes-warning)
(:propertize "·" display "")))
(defvar jao-minibuffer--original-modeline nil)
(defun jao-minibuffer--add-variable (list-name variable-name &optional order)
(let ((v `(:eval ,variable-name)))
(set list-name (remove v (symbol-value list-name)))
(add-to-ordered-list list-name v order)))
;;;###autoload
(defun jao-minibuffer-add-variable (variable-name &optional order)
(jao-minibuffer--add-variable 'jao-minibuffer-info variable-name order))
;;;###autoload
(defun jao-minibuffer-add-msg-variable (variable-name &optional order)
(jao-minibuffer--add-variable 'jao-minibuffer-msg-info variable-name order))
(defun jao-minibuffer-adjust-mode-line-faces ()
(let ((bg (frame-parameter nil 'background-color)))
(set-face-attribute 'mode-line nil :box nil :height 1
:background bg :foreground bg
:overline jao-minibuffer-active-buffer-line-color
:underline jao-minibuffer-inactive-buffer-line-color
:extend t)
(set-face-attribute 'mode-line-inactive nil :box nil :height 1
:background bg :foreground bg
:overline bg
:underline jao-minibuffer-inactive-buffer-line-color
:extend t)))
;;;###autoload
(defun jao-minibuffer-add-mode-line (order)
(setq jao-minibuffer--original-modeline mode-line-format)
(setq-default mode-line-format '(" "))
(setq-default mode-line-position jao-minibuffer--mode-line-position)
(dolist (b (buffer-list))
(with-current-buffer b (setq-local mode-line-format '(" "))))
(jao-minibuffer-add-variable 'jao-minibuffer--mode-line-format order)
(jao-minibuffer-adjust-mode-line-faces))
;;;###autoload
(define-minor-mode jao-minibuffer-mode
"Show minibuffer status"
:global t :lighter "" :group 'jao
(if jao-minibuffer-mode
(progn (advice-add 'select-window :after #'jao-minibuffer-refresh)
(advice-add 'force-mode-line-update :after #'jao-minibuffer-refresh)
(jao-minibuffer--create-overlays)
(jao-minibuffer-refresh))
(advice-remove 'select-window #'jao-minibuffer-refresh)
(advice-remove 'force-mode-line-update #'jao-minibuffer-refresh)
(jao-minibuffer--remove-overlays)
(jao-minibuffer--insert "")))
;;;###autoload
(defun jao-minibuffer-refresh (&rest _ignore)
(interactive)
(when jao-minibuffer-mode
(let* ((jao-minibuffer-mode nil)
(window-selection-change-functions nil)
(msg (jao-minibuffer--format-info))
(msg-left (jao-minibuffer--format-info jao-minibuffer-msg-info))
(msg-right (jao-minibuffer--aligned (string-width msg-left) msg)))
(jao-minibuffer--set-overlays msg)
(jao-minibuffer--insert (concat msg-left msg-right)))))
;; (add-hook 'window-selection-change-functions #'jao-minibuffer-refresh)
(provide 'jao-minibuffer)
;;; jao-minibuffer.el ends here
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