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+;;; bandali-ibuffer.el --- bandali's Ibuffer setup   -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2018-2020  Amin Bandali
+
+;; Author: Amin Bandali <bandali@gnu.org>
+;; Keywords: tools
+
+;; 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:
+
+;; My Ibuffer setup.
+
+;;; Code:
+
+(csetq
+ ibuffer-saved-filter-groups
+ '(("default"
+    ("dired" (mode . dired-mode))
+    ("org"   (mode . org-mode))
+    ("gnus"
+     (or
+      (mode . gnus-group-mode)
+      (mode . gnus-summary-mode)
+      (mode . gnus-article-mode)
+      (mode . message-mode)))
+    ("web"
+     (or
+      (mode . mhtml-mode)
+      (mode . css-mode)
+      (mode . scss-mode)
+      (mode . js2-mode)))
+    ("shell"
+     (or
+      (mode . eshell-mode)
+      (mode . shell-mode)
+      (mode . term-mode)))
+    ("programming"
+     (or
+      (mode . python-mode)
+      (mode . c-mode)
+      (mode . c++-mode)
+      (mode . java-mode)
+      (mode . emacs-lisp-mode)
+      (mode . scheme-mode)
+      (mode . haskell-mode)
+      (mode . lean-mode)
+      ;; (mode . go-mode)
+      (mode . alloy-mode)))
+    ("tex"
+     (or
+      (mode . bibtex-mode)
+      (mode . latex-mode)))
+    ("emacs"
+     (or
+      (name . "^\\*scratch\\*$")
+      (name . "^\\*Messages\\*$")))
+    ("exwm" (mode . exwm-mode))
+    ("erc" (mode . erc-mode))))
+ ibuffer-formats
+ '((mark modified read-only locked " "
+         (name 72 72 :left :elide)
+         " "
+         (size-h 9 -1 :right)
+         " "
+         (mode 16 16 :left :elide)
+         " " filename-and-process)
+   (mark " "
+         (name 16 -1)
+         " " filename)))
+(with-eval-after-load 'ibuffer
+  ;; Use human readable Size column instead of original one
+  (define-ibuffer-column size-h
+    (:name "Size" :inline t)
+    (cond
+     ((> (buffer-size) 1000000) (format "%7.1fM" (/ (buffer-size) 1000000.0)))
+     ((> (buffer-size) 100000) (format "%7.0fk" (/ (buffer-size) 1000.0)))
+     ((> (buffer-size) 1000) (format "%7.1fk" (/ (buffer-size) 1000.0)))
+     (t (format "%8d" (buffer-size)))))
+
+  ;; local key bindings
+  (define-key ibuffer-mode-map (kbd "P")
+    #'ibuffer-backward-filter-group)
+  (define-key ibuffer-mode-map (kbd "N")
+    #'ibuffer-forward-filter-group)
+  (define-key ibuffer-mode-map (kbd "M-p")
+    #'ibuffer-do-print)
+  (define-key ibuffer-mode-map (kbd "M-n")
+    #'ibuffer-do-shell-command-pipe-replace))
+;; global key bindings
+(global-set-key (kbd "C-x C-b") #'ibuffer)
+;; hooks
+(declare-function ibuffer-switch-to-saved-filter-groups "ibuf-ext"
+                    (name))
+(add-hook 'ibuffer-hook
+          (lambda () (ibuffer-switch-to-saved-filter-groups "default")))
+
+(provide 'bandali-ibuffer)
+;;; bandali-ibuffer.el ends here