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;; http://whattheemacsd.com/
;; whitespace cleanup
;; buffer-specific prevention modified from
;; http://stackoverflow.com/questions/14913398/
;; in-emacs-how-do-i-save-without-running-save-hooks
(defvar km/prevent-cleanup nil
"If set, `km/cleanup-buffer' does not perform clean up on save")
(defun km/toggle-prevent-cleanup ()
"Toggle state of `km/prevent-cleanup'"
(interactive)
(let ((state t))
(when km/prevent-cleanup
(setq state nil))
(set (make-local-variable 'km/prevent-cleanup) state)))
(defun km/cleanup-buffer ()
(interactive)
(unless km/prevent-cleanup
(unless (equal major-mode 'makefile-gmake-mode)
(untabify (point-min) (point-max)))
(delete-trailing-whitespace)
(set-buffer-file-coding-system 'utf-8)))
(add-hook 'before-save-hook 'km/cleanup-buffer)
(defun km/rename-current-buffer-file ()
"Renames current buffer and file it is visiting."
(interactive)
(let ((name (buffer-name))
(filename (buffer-file-name)))
(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)))
(if (get-buffer new-name)
(error "A buffer named '%s' already exists!" new-name)
(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)))))))
(global-set-key (kbd "C-x C-r") 'km/rename-current-buffer-file)
(defun km/shebang (&optional lang)
(interactive "s\language (default python):")
(if (= (length lang) 0)
(setq lang "python"))
(insert "#!/usr/bin/env " lang "\n"))
(global-set-key (kbd "C-c i s") 'km/shebang)
(defun km/insert-date ()
(interactive)
(insert (format-time-string "%Y-%m-%d")))
(global-set-key (kbd "C-c i d") 'km/insert-date)
(defun km/start-ess ()
(interactive)
(require 'ess-site))
;; http://emacs-fu.blogspot.com/2013/03/editing-with-root-privileges-once-more.html
(defun km/find-file-as-root ()
"`ido-find-file` that automatically edits the file with
root-privileges (using tramp/sudo) if the file is not writable by
user."
(interactive)
(let ((file (ido-read-file-name "Edit as root: ")))
(unless (file-writable-p file)
(setq file (concat "/sudo:root@localhost:" file)))
(find-file file)))
(global-set-key (kbd "C-x F") 'km/find-file-as-root)
(defun km/save-and-kill-buffer ()
"Save current buffer and then kill it"
(interactive)
(save-buffer)
(kill-this-buffer))
(defun km/toggle-line-or-region-comment ()
"Comment/uncomment the current line or region"
(interactive)
(let (beg end)
(if (region-active-p)
(setq beg (region-beginning) end (region-end))
(setq beg (line-beginning-position) end (line-end-position)))
(comment-or-uncomment-region beg end))
(forward-line))
(defun km/todo-comment ()
"Add commented TODO"
(interactive)
(let (beg end)
(if (region-active-p)
(setq beg (region-beginning) end (region-end))
(setq beg (line-beginning-position) end (line-end-position)))
(unless (comment-only-p beg end)
(beginning-of-line)
(insert "TODO ")
(comment-region beg (+ end 5))
(forward-line))))
;; kill functions
(defun km/kill-string-at-point ()
(interactive)
(let ((string-start (nth 8 (syntax-ppss))))
(goto-char string-start)
(kill-sexp)))
(defun km/kill-thing-at-point (thing killthing killarg)
"Go to the beginning of THING and call KILLTHING with
KILLARG."
(goto-char (beginning-of-thing thing))
(funcall killthing killarg))
(defun km/kill-sentence-at-point (arg)
(interactive "P")
(km/kill-thing-at-point 'sentence 'kill-sentence arg))
(defun km/kill-word-at-point (arg)
(interactive "P")
(km/kill-thing-at-point 'word 'kill-word arg))
(defun km/kill-paragraph-at-point (arg)
(interactive "P")
(km/kill-thing-at-point 'paragraph 'kill-paragraph arg))
(defun km/kill-line-at-point (arg)
(interactive "P")
(km/kill-thing-at-point 'line 'kill-line arg))
(defun km/kill-sexp-at-point (arg)
(interactive "P")
(km/kill-thing-at-point 'sexp 'kill-sexp arg))
(global-set-key (kbd "C-c k s") 'km/kill-string-at-point)
(global-set-key (kbd "C-c k .") 'km/kill-sentence-at-point)
(global-set-key (kbd "C-c k w") 'km/kill-word-at-point)
(global-set-key (kbd "C-c k p") 'km/kill-paragraph-at-point)
(global-set-key (kbd "C-c k l") 'km/kill-line-at-point)
(defun km/join-next-line-with-space ()
"Join current line to the next line with a space in between"
(interactive)
(move-end-of-line 1)
(kill-line)
(just-one-space))
(global-set-key (kbd "C-c k j") 'km/join-next-line-with-space)
(defadvice recompile (around restore-windows)
"Prevent recompiling from spawning new windows"
(save-window-excursion
ad-do-it))
(ad-activate 'recompile)
(global-set-key (kbd "C-c g") 'recompile)
;; from prelude
(defun km/swap-windows ()
"If you have 2 windows, it swaps them."
(interactive)
(if (/= (count-windows) 2)
(message "You need exactly 2 windows to do this.")
(let* ((w1 (car (window-list)))
(w2 (cadr (window-list)))
(b1 (window-buffer w1))
(b2 (window-buffer w2))
(s1 (window-start w1))
(s2 (window-start w2)))
(set-window-buffer w1 b2)
(set-window-buffer w2 b1)
(set-window-start w1 s2)
(set-window-start w2 s1)))
(other-window 1))
(global-set-key (kbd "C-c s") 'km/swap-windows)
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