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