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- ;; Thing.el
- ;; adapted from sun-fns.el by Joshua Guttman, MITRE.
- ;; Comments appreciated: guttman@mitre.org
-
-
- (provide 'thing)
-
- (defun thing-boundaries (here)
- "Return start and end of text object at HERE using syntax table and thing-boundary-alist.
- Thing-boundary-alist is a list of pairs of the form (SYNTAX-CHAR FUNCTION)
- where FUNCTION takes a single position argument and returns a cons of places
- (start end) representing boundaries of the thing at that position.
- Typically:
- Left or right Paren syntax indicates an s-expression.
- The end of a line marks the line including a trailing newline.
- Word syntax indicates current word.
- Symbol syntax indicates symbol.
- If it doesn't recognize one of these it selects just the character HERE."
- (interactive "d")
- (if (save-excursion
- (goto-char here)
- (eolp))
- (thing-get-line here)
- (let* ((syntax
- (char-syntax (char-after here)))
- (pair
- (assq syntax thing-boundary-alist)))
-
- (if pair
- (funcall (car (cdr pair)) here)
- (cons here (1+ here))))))
-
-
- (defvar thing-boundary-alist
- '((?w thing-word)
- (?_ thing-symbol)
- (?\( thing-sexp-start)
- (?\$ thing-sexp-start)
- (?' thing-sexp-start)
- (?\" thing-sexp-start)
- (?\) thing-sexp-end)
- (? thing-whitespace))
- "*List of pairs of the form (SYNTAX-CHAR FUNCTION) used by THING-BOUNDARIES.")
-
- (defun thing-get-line (here)
- "Return whole of line HERE is in, with newline unless at eob."
- (save-excursion
- (goto-char here)
- (let* ((start (progn (beginning-of-line 1)
- (point)))
- (end (progn (forward-line 1)
- (point))))
- (cons start end))))
-
- (defun thing-word (here)
- "Return start and end of word at HERE."
- (save-excursion
- (goto-char here)
- (forward-word 1)
- (let ((end (point)))
- (forward-word -1)
- (cons (point) end))))
-
- (defun thing-symbol (here)
- "Return start and end of symbol at HERE."
- (let ((end (scan-sexps here 1)))
- (cons (min here (scan-sexps end -1))
- end)))
-
- (defun thing-sexp-start (here)
- "Return start and end of sexp starting HERE."
- (cons here (scan-sexps here 1)))
-
- (defun thing-sexp-end (here)
- "Return start and end of sexp ending HERE."
- (cons (scan-sexps (1+ here) -1)
- (1+ here)))
-
- (defun thing-whitespace (here)
- "Return start to end of all but one char of whitespace HERE, unless
- there's only one char of whitespace. Then return start to end of it."
- (save-excursion
- (let ((start (progn
- (skip-chars-backward " \t") (1+ (point))))
- (end (progn
- (skip-chars-forward " \t") (point))))
- (if (= start end)
- (cons (1- start) end)
- (cons start end)))))
-
-
-
-
-
- (defun mark-thing-at-point (here)
- "Set point at beginning and mark at end of text object using syntax table.
- See thing-boundaries for definition of text objects"
- (interactive "d")
- (let ((bounds (thing-boundaries here)))
- (goto-char (cdr bounds))
- (set-mark-command nil)
- (goto-char (car bounds))))
-
- (defun kill-thing-at-point (here)
- "Kill text object using syntax table.
- See thing-boundaries for definition of text objects"
- (interactive "d")
- (let ((bounds (thing-boundaries here)))
- (kill-region (car bounds) (cdr bounds))))
-
-
- (defun copy-thing-at-point (here)
- "Copy text object using syntax table.
- See thing-boundaries for definition of text objects"
- (interactive "d")
- (let ((bounds (thing-boundaries here)))
- (copy-region-as-kill (car bounds) (cdr bounds))))
-
- ;;; Two X-related fns.
- ;;;
- ;;;(defun x-mouse-kill-thing (arg)
- ;;; "Kill text object at point or mouse position and insert into window system cut buffer.
- ;;;Save in Emacs kill ring also."
- ;;; (interactive "d")
- ;;; (setq last-command nil)
- ;;; (x-mouse-set-point arg)
- ;;; (let* ((bounds (thing-boundaries (point)))
- ;;; (start (car bounds))
- ;;; (end (cdr bounds)))
- ;;; (x-store-cut-buffer (buffer-substring start end))
- ;;; (kill-region start end)))
- ;;;
- ;;;(defun x-mouse-copy-thing (arg)
- ;;; "Copy text object at point or mouse position into window system cut buffer.
- ;;;Save in Emacs kill ring also."
- ;;; (save-excursion
- ;;; (save-window-excursion
- ;;; (setq last-command nil)
- ;;; (x-mouse-set-point arg)
- ;;; (let* ((bounds (thing-boundaries (point)))
- ;;; (start (car bounds))
- ;;; (end (cdr bounds)))
- ;;; (x-store-cut-buffer (buffer-substring start end))
- ;;; (copy-region-as-kill start end)))))
-
-