code.delx.au - gnu-emacs-elpa/blob - packages/all-19970304.el

   1 ;;; all.el --- Edit all lines matching a given regexp.
   2
   3 ;; Copyright (C) 1985, 1986, 1987, 1992, 1994, 2011 Free Software Foundation, Inc.
   4 ;; Copyright (C) 1994 Per Abrahamsen
   5
   6 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
   7 ;; Version: $Id: all.el,v 5.2 1997/03/04 10:29:42 abraham Exp $
   8 ;; Keywords: matching
   9
  10 ;; LCD Archive Entry:
  11 ;; all|Per Abrahamsen|abraham@dina.kvl.dk|
  12 ;; Edit all lines matching a given regexp|
  13 ;; $Date: 1997/03/04 10:29:42 $|$Revision: 5.2 $|~/misc/all.Z|
  14
  15 ;; This program is free software; you can redistribute it and/or modify
  16 ;; it under the terms of the GNU General Public License as published by
  17 ;; the Free Software Foundation; either version 2, or (at your option)
  18 ;; any later version.
  19 ;;
  20 ;; This program is distributed in the hope that it will be useful,
  21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 ;; GNU General Public License for more details.
  24 ;;
  25 ;; You should have received a copy of the GNU General Public License
  26 ;; along with this program; if not, write to the Free Software
  27 ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  28
  29 ;;; Commentary:
  30
  31 ;; Just like occur, except that changes in the *All* buffer is
  32 ;; propagated to the original buffer.
  33
  34 ;; I also added highlighting of the matches.
  35
  36 ;; You can no longer use mouse-2 to find a match in the original file,
  37 ;; since the default definition of mouse to is useful.
  38 ;; However, `C-c C-c' still works.
  39
  40 ;; Line numbers are not listed in the *All* buffer.
  41
  42 ;; Ok, it is _not_ just like occur.
  43
  44 ;; Some limitations:
  45
  46 ;; - Undo in the *All* buffer is an ordinary change in the original.
  47 ;; - Changes to the original buffer is not reflected in the *All* buffer.
  48 ;; - A single change in the *All* buffer must be limited to a single match.
  49
  50 ;; Requires GNU Emacs 19.23 or later.
  51
  52 ;;; Code:
  53
  54 (defvar all-mode-map ())
  55
  56 (if all-mode-map
  57     ()
  58   (setq all-mode-map (make-sparse-keymap))
  59   (define-key all-mode-map "\C-c\C-c" 'all-mode-goto))
  60
  61 (defvar all-buffer nil)
  62
  63 (defun all-mode ()
  64   "Major mode for output from \\[all].
  65
  66 All changes made in this buffer will be propagated to the buffer where
  67 you ran \\[all].
  68
  69 Press \\[all-mode-goto] to go to the same spot in the original buffer."
  70   (kill-all-local-variables)
  71   (use-local-map all-mode-map)
  72   (setq major-mode 'all-mode)
  73   (setq mode-name "All")
  74   (make-local-variable 'all-buffer)
  75   (run-hooks 'all-mode-hook))
  76
  77 (defun all-mode-find (pos)
  78   ;; Find position in original buffer corresponding to POS.
  79   (let ((overlay (all-mode-find-overlay pos)))
  80     (if overlay
  81         (+ (marker-position (overlay-get overlay 'marker))
  82            (- pos (overlay-start overlay))))))
  83
  84 (defun all-mode-find-overlay (pos)
  85   ;; Find the overlay containing POS.
  86   (let ((overlays (overlays-at pos)))
  87     (while (and overlays (null (overlay-get (car overlays) 'marker)))
  88       (setq overlays (cdr overlays)))
  89     (car-safe overlays)))
  90
  91 (defun all-mode-goto ()
  92   "Move point to the corresponding position in the original buffer."
  93   (interactive)
  94   (let ((pos (all-mode-find (point))))
  95     (if pos
  96         (pop-to-buffer all-buffer)
  97       (error "This text is not from the original buffer"))
  98     (goto-char pos)))
  99
 100 (defvar all-initialization-p nil)
 101
 102 (defun all-before-change-function (from to)
 103   ;; Check that change is legal
 104   (and all-buffer
 105        (not all-initialization-p)
 106        (let ((start (all-mode-find-overlay from))
 107              (end (all-mode-find-overlay to)))
 108          (not (and start (eq start end))))
 109        (error "Changes should be limited to a single text piece")))
 110
 111 (add-hook 'before-change-functions 'all-before-change-function)
 112
 113 (defun all-after-change-function (from to length)
 114   ;; Propagate changes from *All* buffer.
 115   (and all-buffer
 116        (null all-initialization-p)
 117        (let ((buffer (current-buffer))
 118              (pos (all-mode-find from)))
 119          (if pos
 120              (progn
 121                (set-buffer all-buffer)
 122                (delete-region pos (+ pos length))
 123                (save-excursion
 124                  (goto-char pos)
 125                  (insert-buffer-substring buffer from to))
 126                (set-buffer buffer))))))
 127
 128 (add-hook 'after-change-functions 'all-after-change-function)
 129
 130 ;;;###autoload
 131 (defun all (regexp &optional nlines)
 132   "Show all lines in the current buffer containing a match for REGEXP.
 133
 134 If a match spreads across multiple lines, all those lines are shown.
 135
 136 Each line is displayed with NLINES lines before and after, or -NLINES
 137 before if NLINES is negative.
 138 NLINES defaults to `list-matching-lines-default-context-lines'.
 139 Interactively it is the prefix arg.
 140
 141 The lines are shown in a buffer named `*All*'.
 142 Any changes made in that buffer will be propagated to this buffer."
 143   (interactive (list (let* ((default (car regexp-history))
 144                             (input
 145                              (read-from-minibuffer
 146                               (if default
 147                                   (format
 148    "Edit lines matching regexp (default `%s'): " default)
 149                                 "Edit lines matching regexp: ")
 150                               nil nil nil
 151                               'regexp-history)))
 152                        (if (> (length input) 0) input
 153                          (setcar regexp-history default)))
 154                      current-prefix-arg))
 155   (setq nlines (if nlines (prefix-numeric-value nlines)
 156                  list-matching-lines-default-context-lines))
 157   (setq all-initialization-p t)
 158   (let ((first t)
 159         (buffer (current-buffer))
 160         (prevend nil)
 161         (prevstart nil)
 162         (prevpos (point-min)))
 163     (with-output-to-temp-buffer "*All*"
 164       (save-excursion
 165         (set-buffer standard-output)
 166         (all-mode)
 167         (setq all-buffer buffer)
 168         (insert "Lines matching ")
 169         (prin1 regexp)
 170         (insert " in buffer " (buffer-name buffer) ?. ?\n)
 171         (insert "--------\n"))
 172       (if (eq buffer standard-output)
 173           (goto-char (point-max)))
 174       (save-excursion
 175         (beginning-of-buffer)
 176         ;; Find next match, but give up if prev match was at end of buffer.
 177         (while (and (not (= prevpos (point-max)))
 178                     (re-search-forward regexp nil t))
 179           (goto-char (match-beginning 0))
 180           (beginning-of-line)
 181           (setq prevpos (point))
 182           (goto-char (match-end 0))
 183           (let* ((start (save-excursion
 184                           (goto-char (match-beginning 0))
 185                           (forward-line (if (< nlines 0) nlines (- nlines)))
 186                           (point)))
 187                  (end (save-excursion
 188                         (goto-char (match-end 0))
 189                         (if (> nlines 0)
 190                             (forward-line (1+ nlines))
 191                             (forward-line 1))
 192                         (point)))
 193                  marker)
 194             (cond ((null prevend)
 195                    (setq prevstart start
 196                         prevend end))
 197                   ((> start prevend)
 198                    (all-insert)
 199                    (setq prevstart start
 200                          prevend end))
 201                   (t
 202                    (setq prevend end)))))
 203         (if prevend
 204             (all-insert)))))
 205   (setq all-initialization-p nil))
 206
 207 (defun all-insert ()
 208   ;; Insert match.
 209   (save-excursion
 210     (setq marker (make-marker))
 211     (set-marker marker prevstart)
 212     (set-buffer standard-output)
 213     (let ((from (point))
 214           to)
 215       (insert-buffer-substring buffer prevstart prevend)
 216       (setq to (point))
 217       (overlay-put (make-overlay from to) 'marker marker)
 218       (goto-char from)
 219       (while (re-search-forward regexp to t)
 220         (overlay-put (make-overlay (match-beginning 0) (match-end 0))
 221                      'face 'highlight))
 222       (goto-char to)
 223       (if (> nlines 0)
 224           (insert "--------\n")))))
 225
 226 (provide 'all)
 227
 228 ;;; all.el ends here