From b7d2cd9b5bda2c322ea5333913f17fe5c46f8566 Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Sun, 1 Nov 2020 02:13:04 +0000
Subject: jao-ednc: emacs as the system notification daemon

---
 misc/jao-ednc.el       | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++
 misc/jao-minibuffer.el | 29 ++++++++++++++-----
 2 files changed, 97 insertions(+), 7 deletions(-)
 create mode 100644 misc/jao-ednc.el

diff --git a/misc/jao-ednc.el b/misc/jao-ednc.el
new file mode 100644
index 0000000..255aa19
--- /dev/null
+++ b/misc/jao-ednc.el
@@ -0,0 +1,75 @@
+;;; jao-ednc.el --- Minibuffer notifications using EDNC  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020  jao
+
+;; Author: jao <mail@jao.io>
+;; Keywords: tools, abbrev
+
+;; 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:
+
+;;  Use the ednc package to provide a notification daemon that uses
+;;  the minibuffer to display them.
+
+;;; Code:
+
+(require 'ednc)
+(require 'jao-minibuffer)
+
+(defvar jao-ednc--count-format "{%d}")
+(defvar jao-ednc--last-notification nil)
+
+(defun jao-ednc--format-last ()
+  (when jao-ednc--last-notification
+    (let ((s (ednc-format-notification jao-ednc--last-notification t)))
+      (replace-regexp-in-string "\n" " " s))))
+
+(defun jao-ednc--count ()
+  (let ((no (length (ednc-notifications))))
+    (if (> no 0) (format jao-ednc--count-format no) "")))
+
+(defun jao-ednc--on-notify (old new)
+  (when old
+    (setq jao-ednc--last-notification nil)
+    (jao-minibuffer-pop-notification))
+  (when new
+    (setq jao-ednc--last-notification new)
+    (jao-minibuffer-push-notification '(:eval (jao-ednc--format-last)))))
+
+;;;###autoload
+(defun jao-ednc-setup ()
+  (with-eval-after-load "jao-notify"
+    (defun jao-ednc--notify (msg &optional title _)
+      (message "%s%s%s" (or title "") (if title " " "") msg))
+    (advice-add 'jao-notify :override #'jao-ednc--notify))
+  (jao-minibuffer-add-variable '(jao-ednc-count) t)
+  (add-hook 'ednc-notification-presentation-functions #'jao-ednc--on-notify)
+  (ednc-mode))
+
+;;;###autoload
+(defun jao-ednc-show ()
+  (interactive)
+  (pop-to-buffer-same-window "*ednc-log*"))
+
+;;;###autoload
+(defun jao-ednc-invoke-last-action ()
+  (interactive)
+  (if jao-ednc--last-notification
+      (ednc-invoke-action jao-ednc--last-notification)
+    (message "No active notifications"))
+  (jao-minibuffer-pop-notification))
+
+(provide 'jao-ednc)
+;;; jao-ednc.el ends here
diff --git a/misc/jao-minibuffer.el b/misc/jao-minibuffer.el
index 70829bb..6af3730 100644
--- a/misc/jao-minibuffer.el
+++ b/misc/jao-minibuffer.el
@@ -25,6 +25,7 @@
 ;;; Code:
 
 (defvar jao-minibuffer-info ())
+(defvar jao-minibuffer-notification nil)
 (defvar jao-minibuffer-align-right-p t)
 (defvar jao-minibuffer-right-margin 2)
 (defvar jao-minibuffer-maximized-frames-p t)
@@ -37,22 +38,25 @@
     (substring s 0 w)))
 
 (defun jao-minibuffer--aligned (&optional w)
-  (let ((msg (format-mode-line jao-minibuffer-info)))
+  (let ((msg (string-trim (format-mode-line (or jao-minibuffer-notification
+                                                jao-minibuffer-info)))))
     (when (not (string-empty-p msg))
       (if jao-minibuffer-align-right-p
           (let* ((mw (if jao-minibuffer-maximized-frames-p
                          (frame-width)
                        (window-width (minibuffer-window))))
-                 (w (- mw (or w 0) jao-minibuffer-right-margin)))
+                 (w (mod (or w 0) mw))
+                 (w (- mw w 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)))
+  (let* ((msg (let ((inhibit-message t)) (apply old-func args)))
+         (msg (if inhibit-message "" msg))
+         (new-msg (concat msg (jao-minibuffer--aligned (length msg))))
+         (message-log-max nil)
+         (inhibit-message nil))
+    (funcall old-func "%s" new-msg)
     msg))
 
 (advice-add #'message :around #'jao-minibuffer--message)
@@ -68,5 +72,16 @@
 (defun jao-minibuffer-add-variable (variable-name &optional append)
   (add-to-list 'jao-minibuffer-info `(:eval ,variable-name) append))
 
+;;;###autoload
+(defun jao-minibuffer-push-notification (msg)
+  (setq jao-minibuffer-notification msg)
+  (jao-minibuffer-refresh))
+
+;;;###autoload
+(defun jao-minibuffer-pop-notification ()
+  (interactive)
+  (setq jao-minibuffer-notification nil)
+  (jao-minibuffer-refresh))
+
 (provide 'jao-minibuffer)
 ;;; jao-minibuffer.el ends here
-- 
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