460 lines
16 KiB
EmacsLisp
460 lines
16 KiB
EmacsLisp
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; FUNCTIONS
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun unfill-paragraph ()
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"Paragraph at point is unwrapped on one single line."
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(interactive)
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(let ((fill-column (point-max)))
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(fill-paragraph nil)))
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(defun unfill-region ()
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"Unfill all paragraphs found in current region. Each paragraph
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stand on its line."
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(interactive)
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(let ((fill-column (point-max)))
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(fill-region (region-beginning) (region-end) nil)))
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(defun sort-lines-unique ()
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"Remove duplicate lines using shell command `sort -u'"
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(interactive)
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(shell-command-on-region (point) (mark) "sort -u" (buffer-name) t))
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(defun dtwi ()
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"Delete trailing whitespaces interactively."
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(interactive)
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(query-replace-regexp " +
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" "
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"))
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(defun toggle-window-split ()
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"Vertical split shows more of each line, horizontal split shows
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more lines. This code toggles between them. It only works for
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frames with exactly two windows."
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(interactive)
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(if (= (count-windows) 2)
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(let* ((this-win-buffer (window-buffer))
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(next-win-buffer (window-buffer (next-window)))
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(this-win-edges (window-edges (selected-window)))
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(next-win-edges (window-edges (next-window)))
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(this-win-2nd (not (and (<= (car this-win-edges)
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(car next-win-edges))
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(<= (cadr this-win-edges)
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(cadr next-win-edges)))))
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(splitter
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(if (= (car this-win-edges)
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(car (window-edges (next-window))))
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'split-window-horizontally
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'split-window-vertically)))
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(delete-other-windows)
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(let ((first-win (selected-window)))
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(funcall splitter)
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(if this-win-2nd (other-window 1))
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(set-window-buffer (selected-window) this-win-buffer)
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(set-window-buffer (next-window) next-win-buffer)
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(select-window first-win)
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(if this-win-2nd (other-window 1))))))
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(define-key my-keys-minor-mode-map [(control c) (|)] 'toggle-window-split)
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(defun duplicate (arg)
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"Duplicates 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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(if (and mark-active (> (point) (mark)))
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(exchange-point-and-mark))
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(setq beg (line-beginning-position))
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(if mark-active
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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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(define-key my-keys-minor-mode-map (kbd "C-x M-d") 'duplicate)
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(defun comment-or-uncomment-current-line-or-region ()
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"Comments or uncomments current current line or whole lines in region."
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(interactive)
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(save-excursion
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(let (min max)
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(if (region-active-p)
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(setq min (region-beginning) max (region-end))
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(setq min (point) max (point)))
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(comment-or-uncomment-region
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(progn (goto-char min) (line-beginning-position))
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(progn (goto-char max) (line-end-position))))))
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(define-key my-keys-minor-mode-map "\M-;" 'comment-or-uncomment-current-line-or-region)
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(defun xor (b1 b2)
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"Exclusive or of its two arguments."
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(or (and b1 b2)
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(and (not b1) (not b2))))
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(defun move-border-left-or-right (arg dir)
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"General function covering move-border-left and
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move-border-right. If DIR is t, then move left, otherwise move
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right."
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(interactive)
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(if (null arg) (setq arg 5))
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(let ((left-edge (nth 0 (window-edges))))
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(if (xor (= left-edge 0) dir)
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(shrink-window arg t)
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(enlarge-window arg t))))
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(defun move-border-left (arg)
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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.
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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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(defun move-border-right (arg)
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"If this is a window with its right edge being the edge of the
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screen, shrink the window horizontally. If this is a window with
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its left edge being the edge of the screen, enlarge the window
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horizontally. Otherwise, default to shrinking horizontally.
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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 nil)))
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(define-key my-keys-minor-mode-map (kbd "M-(") 'move-border-left)
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(define-key my-keys-minor-mode-map (kbd "M-)") 'move-border-right)
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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 swap-windows ()
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"If you have 2 windows, it swaps them."
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(interactive)
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(cond ((/= (count-windows) 2)
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(message "You need exactly 2 windows to do this."))
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(t
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(let* ((w1 (first (window-list)))
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(w2 (second (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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(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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(other-window 1))
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(define-key my-keys-minor-mode-map (kbd "C-x M-s") 'swap-windows)
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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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(define-key my-keys-minor-mode-map (kbd "C-x w") 'rename-buffer-and-file)
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(defun kill-all-buffers ()
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"Kill all buffers, leaving *scratch* only."
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(interactive)
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(mapc
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(lambda (x)
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(kill-buffer x))
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(buffer-list))
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(delete-other-windows))
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(defun sanitize ()
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"Untabifies, indents and deletes trailing whitespace from buffer or region."
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(interactive)
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(save-excursion
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(unless (region-active-p)
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(mark-whole-buffer))
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(untabify (region-beginning) (region-end))
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(indent-region (region-beginning) (region-end))
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(save-restriction
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(narrow-to-region (region-beginning) (region-end))
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(delete-trailing-whitespace))))
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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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(message "Shell command history is empty."))))
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(define-key my-keys-minor-mode-map (kbd "C-M-!") 'shell-last-command)
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(defun map-on-pair (function sequence)
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"Map a function taking two arguments on a sequence of pairs."
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(mapcar (lambda (p) (funcall function (car p) (cadr p))) sequence ))
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(defun mark-word (&optional arg allow-extend)
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"Set mark ARG words away from point.
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The place mark goes is the same place \\[forward-word] would move
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to with the same argument. Interactively, if this command is
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repeated or (in Transient Mark mode) if the mark is active, it
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marks the next ARG words after the ones already marked.
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This overloads the vanilla function to mark words from the
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beginning."
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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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(setq arg (if arg (prefix-numeric-value arg)
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(if (< (mark) (point)) -1 1)))
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(set-mark
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(save-excursion
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(goto-char (mark))
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(forward-word arg)
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(point))))
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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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(push-mark
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(save-excursion
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(forward-word (prefix-numeric-value arg))
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(point))
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nil t))))
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(defvar translate-lang-input ""
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"Current input language for the `translate' function. Change it
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with `translate-set-language'.")
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(defvar translate-lang-output "en"
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"Current output language for the `translate' function. Change
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it with `translate-set-language'.")
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(defvar translate-lang-p nil
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"The original value is nil. When `translate' is called for the
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first time, input and output languages are set and this variable
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is set to true.")
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(defun translate-set-language ()
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"Set input/output languages for current buffer. Leave input
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empty for auto-detect. Empty output defaults to English."
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(interactive)
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(set (make-local-variable 'translate-lang-input)
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(read-from-minibuffer "Input language: "))
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(let ((out (read-from-minibuffer "Output language: ")))
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(set (make-local-variable 'translate-lang-output)
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(if (string-match "^ *$" out) "en" out))))
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(defun translate ()
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"Replace current region with its translation."
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(interactive)
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(unless translate-lang-p
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(translate-set-language)
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(set (make-local-variable 'translate-lang-p) t))
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(shell-command-on-region
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(point) (mark)
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(concat "translate "
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(unless (string= translate-lang-input "")
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(concat "-i " translate-lang-input))
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" " translate-lang-output) nil t))
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(defun translate-line-by-line ()
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"Translate lines in region or current line if there is no
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region. Output result at the end after an ' = ' separtor."
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(interactive)
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(unless translate-lang-p
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(translate-set-language)
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(set (make-local-variable 'translate-lang-p) t))
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(let ((line)
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(cmd (concat "translate "
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(unless (string= translate-lang-input "")
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(concat "-i " translate-lang-input))
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" " translate-lang-output))
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(beg (line-number-at-pos (point)))
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(end (line-number-at-pos (if mark-active (mark) (point)))))
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;; Mark is assumed to specify the end. If it not not the case, we switch
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;; the values.
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(when (> beg end)
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(setq beg (line-number-at-pos (mark)))
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(setq end (line-number-at-pos (point))))
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(save-excursion
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;; forward-line will remain on the same line if EOF has been reached. Need
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;; to check for it.
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(while (<= beg end)
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(goto-line beg)
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(setq line (buffer-substring-no-properties
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(line-beginning-position) (line-end-position)))
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(unless (string-match "^ *$" line)
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(end-of-line)
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(insert " = " (shell-command-to-string
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(concat cmd " '" line "'")))
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;; Shell commands usually output an EOL. We should remove it.
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(delete-char -1))
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(setq beg (1+ beg))))))
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(defun pos-at-line (arg)
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"Return the position at beginning of line."
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(save-excursion
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(goto-line arg)
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(beginning-of-line)
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(point)))
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(defun toggle-trailing-whitespace ()
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"Show trailing whitespace or not."
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(interactive)
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(if show-trailing-whitespace
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(setq show-trailing-whitespace nil)
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(setq show-trailing-whitespace t)))
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(defun toggle-indent-tabs ()
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"Indent with tabs or spaces."
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(interactive)
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(if indent-tabs-mode
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(progn
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(message "Indent using spaces")
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(setq indent-tabs-mode nil))
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(message "Indent using tabs")
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(setq indent-tabs-mode t)))
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(define-key my-keys-minor-mode-map (kbd "C-x M-i") 'toggle-indent-tabs)
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(defun toggle-word-delim ()
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"Make underscore part of the word syntax or not."
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(interactive)
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(if (string= (char-to-string (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 calc-eval-line ()
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"Compute mathematical expression with calc and append result to
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end of line after an ' = ' separtor."
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(interactive)
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(end-of-line)
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(insert " = " (calc-eval (buffer-substring-no-properties
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(line-beginning-position) (line-end-position)))))
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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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(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 count-percents (string)
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"Return number of times % occurs in a printf format string, %%
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exluded."
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(let ((start 0) (matches 0))
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(while (string-match "%." string start)
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(unless (string= (match-string 0 string) "%%")
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(setq matches (1+ matches)))
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(setq start (match-end 0)))
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matches))
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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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(define-key my-keys-minor-mode-map [pause] 'toggle-window-dedicated)
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(defun get-closest-pathname (&optional file)
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"Determine the pathname of the first instance of FILE starting
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from the current directory towards root. This may not do the
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correct thing in presence of links. If it does not find FILE,
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then it shall return the name of FILE in the current directory,
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suitable for creation"
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(let ((current-dir default-directory) (looping t) (makefile (or file "Makefile")))
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(while (progn
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(if (file-exists-p (expand-file-name makefile current-dir))
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(setq looping nil)
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(setq current-dir (expand-file-name ".." current-dir)))
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(and looping (not (equal current-dir "/")))))
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(if (equal current-dir "/") nil (expand-file-name makefile current-dir))))
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(defun skeleton-make-markers ()
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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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;; TODO: skeleton move reverse does not work properly.
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(defun skeleton-next-position (&optional reverse)
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"Skeleton movements through placeholders."
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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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(when positions
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(if (catch 'break
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(while (setq pos (pop positions))
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(when (funcall comp (point) pos)
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(throw 'break t))))
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(goto-char pos)
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(goto-char (marker-position
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(if reverse
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(car (last skeleton-markers))
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(car skeleton-markers))))))))
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(defun pdf-compress (&optional arg)
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"Call `pdfcompess' inplace over argument. If no argument is
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provided, use PDF associated to current buffer filename."
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(interactive)
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(let ((file (concat
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(file-name-sans-extension
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(if arg arg
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(if (equal current-prefix-arg '(4))
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(read-string "File name: " nil nil buffer-file-name)
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buffer-file-name)))
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".pdf")))
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(when (and (file-exists-p file) (file-writable-p file))
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;; TODO: check for errors and print better messages.
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(call-process "pdfcompress" nil nil nil "-i" file))
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))
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(provide 'functions)
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