577 lines
21 KiB
EmacsLisp
577 lines
21 KiB
EmacsLisp
;;; Functions
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;;; Notes on mark and region: to get a consistent behaviour regardless of
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;;; Transient mode, check `(use-region-p)'. It will work as expected if
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;;; transient. If not, it will always be true as soon as the mark has been set
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;;; once; so you need to make sure the mark is set as you want beforehand (e.g.
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;;; whole buffer, single line...). This is the behaviour of `sort-lines'.
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;;;
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;;; The clean way to get static region boundaries and fallback on buffer boundaries:
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;;
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;; (let (start end)
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;; (if (use-region-p)
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;; (setq start (region-beginning) end (region-end))
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;; (setq start (point-min) end (point-max)))
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;;
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;;; If several commands act on region and the region size/pos is susceptible to change:
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;;
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;; (let ((start (set-marker (make-marker) (if (use-region-p) (region-beginning) (point-min))))
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;; (end (set-marker (make-marker) (if (use-region-p) (region-end) (point-end)))))
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;;
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;;; For commands that only work on regions:
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;;
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;; (defun count-lines-region (start end)
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;; "Print number of lines and characters in the region."
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;; (interactive "r")
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;; ...
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(defun beginning-of-next-defun ()
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"Move forward to the beginning of a defun.
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Useful when bound to a key opposed to `beginning-of-defun'."
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(interactive)
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(beginning-of-defun -1))
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(global-set-key (kbd "C-M-e") 'beginning-of-next-defun)
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(defun call-process-to-string (program &rest args)
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"Call PROGRAM with ARGS and return output."
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(with-output-to-string
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(with-current-buffer standard-output
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(apply 'call-process program nil t nil args))))
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(defun count-occurences (regex string)
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"Return number of times REGEX occurs in STRING.
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If you want to operate on buffer, use `how-many' instead."
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(let ((start 0) (matches 0))
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(while (string-match regex string start)
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(setq start (match-end 0))
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(setq matches (1+ matches)))
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matches))
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(defun define-keys (map key def &rest bindings)
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"Like `define-key' but allow for defining several bindings at once.
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`KEY' must be acceptable for `kbd'."
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(while key
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(define-key map (kbd key) def)
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(setq key (pop bindings)
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def (pop bindings))))
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(defun duplicate (arg)
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"Duplicate the current line or region ARG times.
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If there's no region, the current line will be duplicated. However, if
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there's a region, all lines that region covers will be duplicated."
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(interactive "p")
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(let (beg
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end
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(origin (point))
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(auto-fill-p (symbol-value 'auto-fill-function)))
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(when (and (use-region-p) (> (point) (mark)))
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(exchange-point-and-mark))
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(setq beg (line-beginning-position))
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(when (use-region-p)
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(exchange-point-and-mark))
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(setq end (line-end-position))
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(let ((region (buffer-substring-no-properties beg end)))
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(auto-fill-mode -1)
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(dotimes (i arg)
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(goto-char end)
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(newline)
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(insert region)
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(setq end (point)))
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(if auto-fill-p (auto-fill-mode))
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(goto-char (+ origin (* (length region) arg) arg)))))
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(global-set-key (kbd "C-x M-d") 'duplicate)
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(defun emacs-process-p (pid)
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"If PID is the process ID of an Emacs process, return t, else nil.
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Also returns nil if pid is nil."
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(when pid
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(let ((attributes (process-attributes pid)) (cmd))
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(dolist (attr attributes)
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(if (string= "comm" (car attr))
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(setq cmd (cdr attr))))
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(if (and cmd (or (string= "emacs" cmd) (string= "emacs.exe" cmd))) t))))
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(defun escape-region (&optional regex to-string)
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"Escape double-quotes and backslashes.
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This is useful for writing Elisp strings containing those
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characters. The optional parameters let you control the replacement of REGEX for
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TO-STRING."
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(interactive)
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(unless regex (setq regex "\\([\"\\\\]\\)"))
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(unless to-string (setq to-string "\\\\\\1"))
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(while (re-search-forward regex (if (use-region-p) (region-end) (point-max)) t)
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(replace-match to-string)))
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(defun eval-and-replace ()
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"Replace the last sexp with its value."
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(interactive)
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(backward-kill-sexp)
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(condition-case nil
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(prin1 (eval (read (current-kill 0)))
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(current-buffer))
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(error (message "Invalid expression")
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(insert (current-kill 0)))))
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(defun eval-last-sexp-and-replace (arg)
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"Like `eval-last-sexp' but vall `eval-and-replace' with double prefix arg."
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(interactive "P")
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(message "%S" arg)
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(if (equal current-prefix-arg '(16))
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(eval-and-replace)
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(eval-last-sexp arg)))
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(global-set-key (kbd "C-x C-e") 'eval-last-sexp-and-replace)
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(defun find-symbol-at-point ()
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"Find directly the symbol at point, i.e. go to definition."
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(interactive)
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(let ((sym (symbol-at-point)))
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(if (boundp sym)
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(find-variable sym)
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(find-function sym))))
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(defun fmt ()
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"(Un)tabify, indent and delete trailing whitespace.
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Tabify if `indent-tabs-mode' is true, otherwise use spaces.
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Work on buffer or region.
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If `fmt-inhinit-p' is non-nil, it does nothing.
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Require `tabify-leading'."
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(interactive)
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(unless fmt-inhibit-p
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(let ((start (set-marker (make-marker) (if (use-region-p) (region-beginning) (point-min))))
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(end (set-marker (make-marker) (if (use-region-p) (region-end) (point-max)))))
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(if indent-tabs-mode
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(tabify-leading)
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(untabify start end))
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(indent-region start end)
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(save-restriction
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(narrow-to-region start end)
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(delete-trailing-whitespace)))))
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(defcustom fmt-inhibit-p t
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"Do not run `fmt' if non-nil.
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As this is not friendly to foreign projects, `fmt' should be run
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selectively."
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:safe 'booleanp)
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(defun flyspell-and-whitespace-mode ()
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"Toggle `flyspell-mode' and `whitespace-mode'."
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(interactive)
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(if (derived-mode-p 'text-mode)
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(flyspell-mode)
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(if flyspell-mode (flyspell-mode 0) (flyspell-prog-mode)))
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(whitespace-mode 'toggle))
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(global-set-key (kbd "<f9>") 'flyspell-and-whitespace-mode)
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;;; From https://www.reddit.com/r/emacs/comments/70bn7v/what_do_you_have_emacs_show_when_it_starts_up/.
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;;; Supply a random fortune cookie as the *scratch* message.
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(defun fortune-scratch-message ()
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(interactive)
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(let ((fortune
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(when (executable-find "fortune")
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(with-temp-buffer
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(shell-command "fortune" t)
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(while (not (eobp))
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(insert ";; ")
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(forward-line))
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(delete-trailing-whitespace (point-min) (point-max))
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(concat (buffer-string) "\n")))))
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(if (called-interactively-p 'any)
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(insert fortune)
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fortune)))
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(defun global-set-keys (key def &rest bindings)
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"Like `global-set-key' but allow for defining several bindings at once.
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`KEY' must be acceptable for `kbd'."
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(while key
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(global-set-key (kbd key) def)
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(setq key (pop bindings)
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def (pop bindings))))
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(defun insert-and-indent (text)
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"Insert indented TEXT at point."
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(interactive "s Text: ")
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(let ((oldpoint (point)))
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(insert text)
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(indent-region oldpoint (point))
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(newline-and-indent)))
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(defun insert-file-name (filename &optional args)
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"Insert name of file FILENAME into buffer after point.
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Prefixed with \\[universal-argument], expand the file name to its
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fully canonicalized path. See `expand-file-name'.
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Prefixed with \\[negative-argument], use relative path to file
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name from current directory, `default-directory'. See
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`file-relative-name'.
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The default with no prefix is to insert the file name exactly as
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it appears in the minibuffer prompt."
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;; Based on insert-file in Emacs -- ashawley 20080926
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(interactive "*fInsert file name: \nP")
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(cond ((eq '- args)
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(insert (file-relative-name filename)))
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((not (null args))
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(insert (expand-file-name filename)))
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(t
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(insert filename))))
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(defun local-set-keys (key def &rest bindings)
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"Like `local-set-key' but allow for defining several bindings at once.
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`KEY' must be acceptable for `kbd'."
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(while key
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(local-set-key (kbd key) def)
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(setq key (pop bindings)
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def (pop bindings))))
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(defun mark-word-from-beginning (&optional arg allow-extend)
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"Set the point at the beginning of the word and call `mark-word'.
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ARG and ALLOW-EXTEND are the same."
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(interactive "P\np")
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(cond ((and allow-extend
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(or (and (eq last-command this-command) (mark t))
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(region-active-p)))
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(mark-word arg allow-extend))
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(t
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;; The next line makes sure the word at point gets selected if point is
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;; on the first letter. We need to ignore error if point is at EOF.
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(ignore-errors (forward-char))
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(backward-word)
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(mark-word arg allow-extend))))
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(global-set-key (kbd "M-@") 'mark-word-from-beginning)
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(defun move-border-left (arg)
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"Move window border in a natural manner.
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If this is a window with its right edge being the edge of the
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screen, enlarge the window horizontally. If this is a window with
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its left edge being the edge of the screen, shrink the window
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horizontally. Otherwise, default to enlarging horizontally.\n
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Enlarge/Shrink by ARG columns, or 5 if ARG is nil."
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(interactive "P")
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(if (= (count-windows) 2)
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(move-border-left-or-right arg t)))
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(global-set-key (kbd "M-(") 'move-border-left)
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(defun move-border-left-or-right (arg dir-left)
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"Wrapper around ‘move-border-left’ and ‘move-border-right’.
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ARG is the number of columns to move.
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If DIR-LEFT is t, then move left, otherwise move right."
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(interactive)
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(unless arg (setq arg 5))
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(let ((left-edge (= (car (window-edges)) 0)))
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(if (or
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(and left-edge dir-left)
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(and (not left-edge) (not dir-left)))
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(shrink-window arg t)
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(enlarge-window arg t))))
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(defun move-border-right (arg)
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"See `move-border-left'."
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(interactive "P")
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(if (= (count-windows) 2)
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(move-border-left-or-right arg nil)))
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(global-set-key (kbd "M-)") 'move-border-right)
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;;; Almost useless compared to Helm-file M-R. However helm does not change
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;;; current directory.
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(defun rename-buffer-and-file ()
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"Renames current buffer and file it is visiting."
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(interactive)
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(let ((name (buffer-name))
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(filename (buffer-file-name)))
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(if (not (and filename (file-exists-p filename)))
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(error "Buffer '%s' is not visiting a file!" name)
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(let ((new-name (read-file-name "New name: " filename)))
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(cond ((get-buffer new-name)
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(error "A buffer named '%s' already exists!" new-name))
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(t
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(rename-file filename new-name 1)
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(rename-buffer new-name)
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(set-visited-file-name new-name)
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(set-buffer-modified-p nil)
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(message "File '%s' successfully renamed to '%s'" name (file-name-nondirectory new-name))))))))
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(defun reset-fill-column ()
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"Reset `fill-column' to its default value."
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(setq fill-column (default-value 'fill-column)))
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(defun shell-last-command ()
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"Run last shell command."
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(interactive)
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(let ((last (car shell-command-history)))
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(if last
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(shell-command last)
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(error "Shell command history is empty"))))
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(global-set-key (kbd "C-M-!") 'shell-last-command)
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(defun skeleton-make-markers ()
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"Save last skeleton markers in a list.
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Hook function for skeletons."
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(while skeleton-markers
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(set-marker (pop skeleton-markers) nil))
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(setq skeleton-markers
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(mapcar 'copy-marker (reverse skeleton-positions))))
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(defvar skeleton-markers nil
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"Markers for locations saved in `skeleton-positions'.")
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(defun skeleton-previous-position ()
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"Move to previous skeleton placeholder.
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See `skeleton-next-position'."
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(skeleton-next-position t))
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(defun skeleton-next-position (&optional reverse)
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"Move to next skeleton placeholder.
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If REVERSE it t, move to previous placeholder."
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(interactive "P")
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(let ((positions (mapcar 'marker-position skeleton-markers))
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(comp (if reverse '< '<=))
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pos
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prev)
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(when positions
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(setq pos (pop positions))
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(while (and pos (funcall comp pos (point)))
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(setq prev pos)
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(setq pos (pop positions)))
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(cond
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((and reverse prev) (goto-char prev))
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(reverse (goto-char (car (last skeleton-markers))))
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(pos (goto-char pos))
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(t (goto-char (car skeleton-markers)))))))
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(defun sort-lines-unique (arg)
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"Remove trailing white space, then duplicate lines, then sort the result.
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Do not fold case with \\[universal-argument] or non-nil ARG."
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(interactive "P")
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(let ((start (set-marker (make-marker) (if (use-region-p) (region-beginning) (point-min))))
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(end (set-marker (make-marker) (if (use-region-p) (region-end) (point-end)))))
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(let ((sort-fold-case (if arg nil t)))
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(delete-trailing-whitespace start end)
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(delete-duplicate-lines start end)
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(sort-lines nil start end))))
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(defun spawn-terminal ()
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"Spawn terminal asynchronously.
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The SHELL_CD environement variable is set to `default-directory'.
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The shell can use it to automatically change directory to it."
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(interactive)
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(let ((term (or (getenv "TERMCMD") "xterm")))
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(when (executable-find term)
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(start-process "dummy" nil "env" (concat "SHELL_CD=" (expand-file-name default-directory)) term))))
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(defun swap-windows (&optional w1 w2)
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"If 2 windows are up, swap them.
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Else if W1 is a window, swap it with current window.
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If W2 is a window too, swap both."
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(interactive)
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(unless (or (= 2 (count-windows))
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(windowp w1)
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(windowp w2))
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(error "Ambiguous window selection"))
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(let* ((w1 (or w1 (car (window-list))))
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(w2 (or w2
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(if (eq w1 (car (window-list)))
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(nth 1 (window-list))
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(car (window-list)))))
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(b1 (window-buffer w1))
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(b2 (window-buffer w2))
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(s1 (window-start w1))
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(s2 (window-start w2)))
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(with-temp-buffer
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;; Some buffers like EXWM buffers can only be in one live buffer at once.
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;; Switch to a dummy buffer in w2 so that we don't display any buffer twice.
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(set-window-buffer w2 (current-buffer))
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(set-window-buffer w1 b2)
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(set-window-buffer w2 b1))
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(set-window-start w1 s2)
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(set-window-start w2 s1))
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(select-window w1))
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(global-set-key (kbd "C-x \\") 'swap-windows)
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(defun swap-windows-left ()
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"Swap current window with the window to the left."
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(interactive)
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(swap-windows (window-in-direction 'left)))
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(defun swap-windows-below ()
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"Swap current window with the window below."
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(interactive)
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(swap-windows (window-in-direction 'below)))
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(defun swap-windows-above ()
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"Swap current window with the window above."
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(interactive)
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(swap-windows (window-in-direction 'above)))
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(defun swap-windows-right ()
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"Swap current window with the window to the right."
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(interactive)
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(swap-windows (window-in-direction 'right)))
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(defun switch-to-last-buffer ()
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"Switch to last open buffer in current window."
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(interactive)
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(switch-to-buffer (other-buffer (current-buffer) 1)))
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(defun tabify-leading ()
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"Call `tabify' on leading spaces only.
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Works on whole buffer if region is unactive."
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(interactive)
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(require 'tabify) ; Need this to initialize `tabify-regexp'.
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(let ((tabify-regexp-old tabify-regexp) start end)
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(if (use-region-p)
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(setq start (region-beginning) end (region-end))
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(setq start (point-min) end (point-max)))
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(unwind-protect
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(progn
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(setq tabify-regexp "^\t* [ \t]+")
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(tabify start end))
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(setq tabify-regexp tabify-regexp-old))))
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;;; TODO: Store window configurations in a buffer-name-indexed alist? Not
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;;; sure that would ever be useful.
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(defvar single-window--last-configuration nil "Last window configuration before calling `delete-other-windows'.")
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(defun toggle-single-window ()
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"Un-maximize current window.
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If multiple windows are active, save window configuration and
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delete other windows. If only one window is active and a window
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configuration was previously save, restore that configuration."
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(interactive)
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(if (= (count-windows) 1)
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(when single-window--last-configuration
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(set-window-configuration single-window--last-configuration))
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(setq single-window--last-configuration (current-window-configuration))
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(delete-other-windows)))
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(defun toggle-window-dedicated ()
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"Toggle whether the current active window is dedicated or not.
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Run it in each window you want to 'freeze', i.e. prevent Emacs
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from acting on it."
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(interactive)
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(message
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(if (let ((window (get-buffer-window (current-buffer))))
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(set-window-dedicated-p window
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(not (window-dedicated-p window))))
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"Window '%s' is dedicated"
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"Window '%s' is normal")
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(current-buffer)))
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(global-set-key (kbd "<pause>") 'toggle-window-dedicated)
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(defun toggle-window-split ()
|
||
"Switch between vertical and horizontal split.
|
||
It only works for frames with exactly two windows."
|
||
(interactive)
|
||
(if (= (count-windows) 2)
|
||
(let* ((this-win-buffer (window-buffer))
|
||
(next-win-buffer (window-buffer (next-window)))
|
||
(this-win-edges (window-edges (selected-window)))
|
||
(next-win-edges (window-edges (next-window)))
|
||
(this-win-2nd (not (and (<= (car this-win-edges)
|
||
(car next-win-edges))
|
||
(<= (cadr this-win-edges)
|
||
(cadr next-win-edges)))))
|
||
(splitter
|
||
(if (= (car this-win-edges)
|
||
(car (window-edges (next-window))))
|
||
'split-window-horizontally
|
||
'split-window-vertically)))
|
||
(delete-other-windows)
|
||
(let ((first-win (selected-window)))
|
||
(funcall splitter)
|
||
(if this-win-2nd (other-window 1))
|
||
(set-window-buffer (selected-window) this-win-buffer)
|
||
(set-window-buffer (next-window) next-win-buffer)
|
||
(select-window first-win)
|
||
(if this-win-2nd (other-window 1))))))
|
||
(global-set-key (kbd "C-x C-\\") 'toggle-window-split)
|
||
|
||
(defun toggle-word-delim ()
|
||
"Make underscore part of the word syntax or not.
|
||
This does not interfere with `subword-mode'."
|
||
(interactive)
|
||
(if (equal (char-syntax ?_) "_")
|
||
(progn
|
||
(modify-syntax-entry ?_ "w")
|
||
(message "_ is a not word delimiter"))
|
||
(modify-syntax-entry ?_ "_")
|
||
(message "_ is a word delimiter")))
|
||
|
||
;;; TODO: Move turn-on-* functions to 'hook-functions.el'?
|
||
;;; Replace useless individual comments with a single global comment.
|
||
|
||
(defun turn-on-column-number-mode ()
|
||
"Unconditionally turn on `column-number-mode' for the current buffer."
|
||
(set (make-variable-buffer-local 'column-number-mode) t))
|
||
|
||
(defun turn-on-complete-filename ()
|
||
"Unconditionally turn on `comint-dynamic-complete-filename' for the current buffer."
|
||
(add-to-list 'completion-at-point-functions 'comint-dynamic-complete-filename t))
|
||
|
||
(defun turn-on-delete-trailing-whitespace ()
|
||
"Add the `delete-trailing-whitespace' function to `before-save-hook'.
|
||
This does not affect .csv files."
|
||
(unless (string= (file-name-extension buffer-file-name) "csv")
|
||
(add-hook 'before-save-hook 'delete-trailing-whitespace nil t)))
|
||
|
||
(defun turn-off-delete-trailing-whitespace ()
|
||
"Unconditionally remove the `delete-trailing-whitespace' function to `before-save-hook'."
|
||
(remove-hook 'before-save-hook 'delete-trailing-whitespace t))
|
||
|
||
(defun turn-on-fmt-before-save ()
|
||
"Unconditionally add the `fmt' function to `before-save-hook'."
|
||
(add-hook 'before-save-hook 'fmt nil t))
|
||
|
||
(defun turn-off-fmt-before-save ()
|
||
"Unconditionally remove the `fmt' function to `before-save-hook'."
|
||
(remove-hook 'before-save-hook 'fmt t))
|
||
|
||
(defun turn-off-indent-tabs ()
|
||
"Unconditionally turn off tab indentation."
|
||
(setq indent-tabs-mode nil))
|
||
|
||
(defun turn-on-indent-tabs ()
|
||
"Unconditionally turn on tab indentation."
|
||
(setq indent-tabs-mode t))
|
||
|
||
(defun turn-off-line-number-mode ()
|
||
"Unconditionally turn off `line-number-mode' fur the current buffer.."
|
||
(set (make-variable-buffer-local 'line-number-mode) nil))
|
||
|
||
(defun turn-off-linum ()
|
||
"Unconditionally turn off Linum mode."
|
||
(linum-mode 0))
|
||
|
||
(defun turn-on-newline-paragraph ()
|
||
"Unconditionally make of newlines the start of a paragraph."
|
||
(set (make-local-variable 'paragraph-start) "
|
||
"))
|
||
|
||
(defun turn-off-nobreak-char-display ()
|
||
(set (make-local-variable 'nobreak-char-display) nil))
|
||
|
||
(defun turn-on-skeleton-markers ()
|
||
"Allow skeletons to make markers to ease field navigation."
|
||
(add-hook 'skeleton-end-hook 'skeleton-make-markers))
|
||
|
||
(defun turn-on-tab-width-to-4 ()
|
||
"Unconditionally set tab width to 4."
|
||
(setq tab-width 4))
|
||
|
||
(defun turn-on-tab-width-to-8 ()
|
||
"Unconditionally set tab width to 8."
|
||
(setq tab-width 8))
|
||
|
||
(defun unfill-paragraph ()
|
||
"Paragraph at point is unwrapped on one single line."
|
||
(interactive)
|
||
(let ((fill-column (point-max)))
|
||
(fill-paragraph nil)))
|
||
|
||
(defun unfill-region ()
|
||
"Unfill all paragraphs found in current region.
|
||
Each paragraph stand on its line."
|
||
(interactive)
|
||
(let ((fill-column (point-max)))
|
||
(fill-region (region-beginning) (region-end) nil)))
|
||
|
||
(provide 'functions)
|