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;;; bandali-utils.el --- useful utilities -*- lexical-binding: t; -*-
;; Copyright (C) 2020 Amin Bandali
;; Author: Amin Bandali <bandali@gnu.org>
;; Keywords: lisp, 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:
;; A small collection of useful utilities used through my init files.
;;; Code:
(defmacro b/setq-every (value &rest vars)
"Set all the variables from VARS to value VALUE."
(declare (indent defun) (debug t))
`(progn ,@(mapcar (lambda (x) (list 'setq x value)) vars)))
(defun b/start-process (program &rest args)
"Same as `start-process', but doesn't bother about name and buffer."
(let ((process-name (concat program "_process"))
(buffer-name (generate-new-buffer-name
(concat program "_output"))))
(apply #'start-process
process-name buffer-name program args)))
(defun b/dired-start-process (program &optional args)
"Open current file with a PROGRAM."
;; Shell command looks like this: "program [ARGS]... FILE" (ARGS can
;; be nil, so remove it).
(declare-function dired-get-file-for-visit "dired")
(apply #'b/start-process
program
(remove nil (list args (dired-get-file-for-visit)))))
(defun b/add-elisp-section ()
(interactive)
(insert "\n")
(forward-line -1)
(insert "\n \n;;; "))
;; (defvar b/fill-column 47
;; "My custom `fill-column'.")
(defconst b/asterism "* * *")
(defun b/insert-asterism ()
"Insert a centred asterism."
(interactive)
(insert
(concat
"\n"
(make-string (floor (/ (- fill-column (length b/asterism)) 2))
?\s)
b/asterism
"\n")))
(defun b/no-mouse-autoselect-window ()
"Conveniently disable `focus-follows-mouse'.
For disabling the behaviour for certain buffers and/or modes."
(make-local-variable 'mouse-autoselect-window)
(setq mouse-autoselect-window nil))
(defun b/kill-current-buffer ()
"Kill the current buffer."
;; also see https://redd.it/64xb3q
(interactive)
(kill-buffer (current-buffer)))
(defun b/move-indentation-or-beginning-of-line (arg)
"Move to the indentation or to the beginning of line."
(interactive "^p")
;; (if (bolp)
;; (back-to-indentation)
;; (move-beginning-of-line arg))
(if (= (point)
(progn (back-to-indentation)
(point)))
(move-beginning-of-line arg)))
(defun b/join-line-top ()
"Like `join-line', but join next line to the current line."
(interactive)
(join-line 1))
(defun b/duplicate-line-or-region (&optional n)
"Duplicate the current line, or region (if active).
Make N (default: 1) copies of the current line or region."
(interactive "*p")
(let ((u-r-p (use-region-p)) ; if region is active
(n1 (or n 1)))
(save-excursion
(let ((text
(if u-r-p
(buffer-substring (region-beginning) (region-end))
(prog1 (thing-at-point 'line)
(end-of-line)
(if (eobp)
(newline)
(forward-line 1))))))
(dotimes (_ (abs n1))
(insert text))))))
(provide 'bandali-utils)
;;; bandali-utils.el ends here
|
