242 lines
8.7 KiB
EmacsLisp
242 lines
8.7 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 ambrevar/call-process-to-string (program &rest args)
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"Call PROGRAM with ARGS and return output.
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See also `process-lines'."
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;; Or equivalently:
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;; (with-temp-buffer
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;; (apply 'process-file program nil t nil args)
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;; (buffer-string))
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(with-output-to-string
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(with-current-buffer standard-output
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(apply 'process-file program nil t nil args))))
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(defun ambrevar/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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;; TODO: Bind this to ediff control panel.
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(defun ambrevar/ediff-copy-both-to-C ()
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(interactive)
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(ediff-copy-diff ediff-current-difference nil 'C nil
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(concat
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(ediff-get-region-contents ediff-current-difference 'A ediff-control-buffer)
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(ediff-get-region-contents ediff-current-difference 'B ediff-control-buffer))))
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(defun ambrevar/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 ambrevar/prettify ()
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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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Require `ambrevar/tabify-leading'."
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(interactive)
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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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(ambrevar/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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(defun ambrevar/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 'prog-mode)
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(flyspell-prog-mode)
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(flyspell-mode)
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(when flyspell-mode
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(flyspell-buffer)))
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(whitespace-mode 'toggle))
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(global-set-key (kbd "<f9>") #'ambrevar/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 ambrevar/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 ambrevar/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 ambrevar/image-display-external ()
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"Display original image at point using external viewer."
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(interactive)
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(let ((file (or (get-text-property (point) 'original-file-name)
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(let ((image (get-text-property (point) 'display)))
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(when image
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(plist-get (cdr image) :file))))))
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(if (not file)
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(message "No original file name found")
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(start-process "image-dired-thumb-external" nil
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image-dired-external-viewer (expand-file-name file)))))
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(define-key image-map (kbd "S-<return>") 'ambrevar/image-display-external)
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(defun ambrevar/current-minor-modes ()
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"Return the list of minor modes enabled in the current buffer."
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(interactive)
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(delq nil
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(mapcar (lambda (mode)
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(if (and (boundp mode) (symbol-value mode))
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mode))
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minor-mode-list)))
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(defun ambrevar/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 ambrevar/reset-fill-column ()
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"Reset `fill-column' to its default value."
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(interactive)
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(setq fill-column (default-value 'fill-column)))
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(defun ambrevar/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 ambrevar/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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;; Inspired by https://github.com/abo-abo/oremacs.git.
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(defun ambrevar/test-emacs ()
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"Return nil on error, t on success so that it can be added to
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`kill-emacs-query-functions'."
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(interactive)
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(if (not user-init-file)
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(progn
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(message "No init file")
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t)
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(let ((output
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(shell-command-to-string
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(format "emacs --batch --eval \"
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(condition-case e
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(progn
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(load \\\"%s\\\")
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(message \\\"-OK-\\\"))
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(error
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(message \\\"ERROR:\\\")
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(signal (car e) (cdr e))))\""
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user-init-file))))
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(if (string-match "-OK-" output)
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(progn
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(when (called-interactively-p 'any)
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(message "All is well"))
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t)
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(switch-to-buffer-other-window "*init file error*")
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(erase-buffer)
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(insert output)
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(search-backward "ERROR:")
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nil))))
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(add-hook 'kill-emacs-query-functions 'ambrevar/test-emacs)
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(defun ambrevar/toggle-word-delim ()
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"Make underscore part of the word syntax or not.
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This does not interfere with `subword-mode'."
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(interactive)
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(if (equal (char-syntax ?_) "_")
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(progn
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(modify-syntax-entry ?_ "w")
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(message "_ is a not word delimiter"))
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(modify-syntax-entry ?_ "_")
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(message "_ is a word delimiter")))
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(defun ambrevar/youtube-dl-url (&optional url)
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"Run 'youtube-dl' over the URL.
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If URL is nil, use URL at point."
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(interactive)
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(setq url (or url (thing-at-point-url-at-point)))
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(let ((eshell-buffer-name "*youtube-dl*")
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(directory (seq-find (lambda (dir)
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(and (file-directory-p dir) (expand-file-name dir)))
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'("~/Videos" "~/Downloads")
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".")))
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(eshell)
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(when (eshell-interactive-process)
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(eshell t))
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(eshell-interrupt-process)
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(insert (format " cd '%s' && youtube-dl " directory) url)
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(eshell-send-input)))
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(provide 'functions)
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