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Annotation of 43BSD/contrib/emacs/lisp/aton.el, revision 1.1.1.1

1.1       root        1: ;; Find occurrences of regexp and pick one from a menu.
                      2: ;; Copyright (C) 1985 Richard M. Stallman.
                      3: ;;  based loosely on mocklisp original by Jeff Shrager and Duane Williams: CMU.
                      4: 
                      5: ;; This file is part of GNU Emacs.
                      6: 
                      7: ;; GNU Emacs is distributed in the hope that it will be useful,
                      8: ;; but WITHOUT ANY WARRANTY.  No author or distributor
                      9: ;; accepts responsibility to anyone for the consequences of using it
                     10: ;; or for whether it serves any particular purpose or works at all,
                     11: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
                     12: ;; License for full details.
                     13: 
                     14: ;; Everyone is granted permission to copy, modify and redistribute
                     15: ;; GNU Emacs, but only under the conditions described in the
                     16: ;; GNU Emacs General Public License.   A copy of this license is
                     17: ;; supposed to have been given to you along with GNU Emacs so you
                     18: ;; can know your rights and responsibilities.  It should be in a
                     19: ;; file named COPYING.  Among other things, the copyright notice
                     20: ;; and this notice must be preserved on all copies.
                     21: 
                     22: 
                     23: (defun occur-menu (string)
                     24:   "Show menu of lines containing match for REGEXP.
                     25: Enters recursive edit on text showing an entry for each matching line.
                     26: User can move to an entry and then exit with \\[exit-recursive-edit] to
                     27: move to the line in the original buffer described by the selected entry.
                     28: Abort with \\[abort-recursive-edit] to avoid moving in the original buffer.
                     29: 
                     30: If REGEXP is empty then THE EXACT SAME menu is presented again,
                     31: with cursor initially at the next successive entry.
                     32: This is useful for stepping through located lines rapidly in order."
                     33:   (interactive "sOccur menu (regexp): ")
                     34:   (let (ln track-eol
                     35:        (accumbuf (get-buffer-create " *Occur menu*"))
                     36:        (databuf (current-buffer))
                     37:        (prev (point-min))
                     38:        (rebuild-summary (not (string-equal string ""))))
                     39:     (if rebuild-summary
                     40:        (progn
                     41:          (save-excursion               ; setup temp buffer
                     42:            (set-buffer accumbuf)
                     43:            (erase-buffer))
                     44:          (save-excursion
                     45:            (goto-char (point-min))
                     46:            (setq ln 1)                 ; init accumulator
                     47:            (while (re-search-forward string nil t)
                     48:              (beginning-of-line)
                     49:              (setq ln (+ ln (count-lines prev (point))))
                     50:              (setq beg (point))
                     51:              (setq prev (point))
                     52:              (end-of-line)             ; to pick up entire line
                     53:              (setq end (point))
                     54:              (save-excursion
                     55:                (set-buffer accumbuf)
                     56:                (insert (int-to-string ln) ". ")
                     57:                (insert-buffer-substring databuf beg end)
                     58:                (newline))
                     59:              (forward-line 1))
                     60:            (set-buffer accumbuf)
                     61:            (set-buffer-modified-p nil))))
                     62:     (goto-line
                     63:      (save-window-excursion
                     64:        (switch-to-buffer accumbuf)
                     65:        (delete-other-windows)
                     66:        (if rebuild-summary
                     67:           (goto-char (point-min))
                     68:         (forward-line 1))
                     69:        (if (= (point-max) 1)
                     70:           (error "No occurrences found."))
                     71:        (message (substitute-command-keys "Use \\[exit-recursive-edit] to select line, \\[abort-recursive-edit] to abort."))
                     72:        (let ((buffer-read-only t))
                     73:         (recursive-edit))
                     74:        (beginning-of-line)
                     75:        (read accumbuf)))))

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