;;; init-buffer.el --- Configure buffer -*- lexical-binding: t -*-
;; Author: Franck Cuny <franck@fcuny.net>

;;; Commentary:

;; buffer related configurations

;;; Code:

(require 'ibuffer)
(require 'ibuf-ext)

(setq ibuffer-expert t)
(setq ibuffer-show-empty-filter-groups nil)
(setq ibuffer-jump-offer-only-visible-buffers t)
(setq ibuffer-maybe-show-predicates '("^\\*.*\\*$"))
(setq ibuffer-never-show-predicates '("^ "))
(setq ibuffer-use-other-window t)

(setq ibuffer-saved-filter-groups
      '(("default"
         ("Config" (or
                    (filename . "world/")
                    (filename . ".emacs/")))

         ("Programming" (or
                         (mode . c++-mode)
                         (mode . c-mode)
                         (mode . cargo-mode)
                         (mode . emacs-lisp-mode)
                         (mode . go-mode)
                         (mode . java-mode)
                         (mode . lisp-mode)
                         (mode . nix-mode)
                         (mode . python-mode)
                         (mode . rust-mode)
                         (mode . sh-mode)
                         (name . "\\*Cargo")
                         (name . "\\*Python.*\\*")))

           ("Writing" (or
                       (mode . plain-tex-mode)
                       (mode . rst-mode)
                       (mode . markdown-mode)
                       (mode . html-mode)
                       (mode . nxhtml-mode)
                       (mode . css-mode)))

           ("Org" (or
                   (mode . org-agenda-mode)
                   (mode . org-mode)))

           ("Dired" (mode . dired-mode))

           ("Terminals" (mode . term-mode))

           ("Shells" (or
                      (mode . eshell-mode)
                      (mode . shell-mode)))

           ("Magit" (or
                     (mode . magit-mode)
                     (name . "\\*magit-.*\\*")))

           ("VC" (name . "\\*vc.*\\*"))

           ("Emacs" (name . "^\\*.*\\*$")))))

(add-hook 'ibuffer-mode-hook
          (lambda ()
            (ibuffer-auto-mode 1)
            (ibuffer-switch-to-saved-filter-groups "default")))

(require 'midnight)
(setq midnight-period (* 3600 6))       ; every 6 hours

(setq clean-buffer-list-delay-general 2           ; every 2 day
      clean-buffer-list-delay-special (* 3600 3)) ; every 3 hours

(defun my/rename-this-buffer-and-file ()
  "Renames current buffer and file it is visiting."
  (interactive)
  (let ((name (buffer-name))
        (filename (buffer-file-name))
        (read-file-name-function 'read-file-name-default))
    (if (not (and filename (file-exists-p filename)))
        (error "Buffer '%s' is not visiting a file!" name)
      (let ((new-name (read-file-name "New name: " filename)))
        (cond ((get-buffer new-name)
               (error "A buffer named '%s' already exists!" new-name))
              (t
               (rename-file filename new-name 1)
               (rename-buffer new-name)
               (set-visited-file-name new-name)
               (set-buffer-modified-p nil)
               (message "File '%s' successfully renamed to '%s'" name (file-name-nondirectory new-name))))))))


(provide 'init-buffer)

;;; init-buffer.el ends here