scsh-0.5/emacs/jar-hacks.el

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EmacsLisp
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1995-10-13 23:34:21 -04:00
; Comment out region
(defun comment-out-region (arg)
"Insert comment string at beginning of each line in the region."
(interactive "P")
(let (start end)
(if (< (point) (mark))
(setq start (point) end (mark-marker))
(setq start (mark) end (point-marker)))
(save-excursion
(untabify start (marker-position end))
(goto-char start)
(if (not (bolp))
(progn (end-of-line) (forward-char)))
(while (< (point) (marker-position end))
(if (eq arg '-)
(if (looking-at comment-start)
(delete-char (length comment-start)))
(insert comment-start))
(end-of-line)
(forward-char)))))
;(defun uncomment-out-region (arg)
; (interactive nil)
; (comment-out-region '-))
; Mini-Find Tag
(defvar last-mini-tag "" "Last tag sought by mini-find-tag.")
(defun mini-find-tag (tagname &optional next)
"Search for a definition of TAGNAME in current buffer.
If TAGNAME is a null string, the expression in the buffer
around or before point is used as the tag name.
If second arg NEXT is non-nil (interactively, with prefix arg),
searches for the next definition in the buffer
that matches the tag name used in the previous mini-find-tag."
(interactive (if current-prefix-arg
'(nil t)
(list (read-string "Mini-find tag: "))))
(if (equal tagname "") ;See definition of find-tag.
(setq tagname (save-excursion
(buffer-substring
(progn (backward-sexp 1) (point))
(progn (forward-sexp 1) (point))))))
(let ((pt (save-excursion
(if (not next)
(goto-char (point-min))
(setq tagname last-mini-tag))
(setq last-mini-tag tagname)
(if (re-search-forward
(concat "^(def.*" tagname)
nil t)
(point)
nil))))
(if pt
(progn (set-mark-command nil)
(goto-char pt))
(signal 'search-failed '()))))
; indent-differently
(defun indent-differently ()
"Make the current line indent like the body of a special form by
changing the operator's scheme-indent-hook appropriately."
(interactive nil)
(let ((here (point)))
(save-excursion
(back-to-indentation)
(backward-up-list 1)
(forward-char 1)
(let ((i -1)
(function nil)
(p (point)))
(while (<= (point) here)
(setq i (+ i 1))
(forward-sexp 1)
(if (= i 0)
(setq function (buffer-substring p (point)))))
(setq i (- i 1))
(let ((name (intern (downcase function))))
(cond ((equal (get name 'scheme-indent-hook) i)
(message "Indent %s nil" name)
(put name 'scheme-indent-hook nil))
(t
(message "Indent %s %d" name i)
(put name 'scheme-indent-hook i))))))
(scheme-indent-line)))