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- ;; Replace commands for Emacs.
- ;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 1, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to
- ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- (fset 'delete-non-matching-lines 'keep-lines)
- (defun keep-lines (regexp)
- "Delete all lines except those containing matches for REGEXP.
- A match split across lines preserves all the lines it lies in.
- Applies to all lines after point."
- (interactive "sKeep lines (containing match for regexp): ")
- (save-excursion
- (or (bolp) (forward-line 1))
- (let ((start (point)))
- (while (not (eobp))
- ;; Start is first char not preserved by previous match.
- (if (not (re-search-forward regexp nil 'move))
- (delete-region start (point-max))
- (let ((end (save-excursion (goto-char (match-beginning 0))
- (beginning-of-line)
- (point))))
- ;; Now end is first char preserved by the new match.
- (if (< start end)
- (delete-region start end))))
- (setq start (save-excursion (forward-line 1)
- (point)))))))
-
- (fset 'delete-matching-lines 'flush-lines)
- (defun flush-lines (regexp)
- "Delete lines containing matches for REGEXP.
- If a match is split across lines, all the lines it lies in are deleted.
- Applies to lines after point."
- (interactive "sFlush lines (containing match for regexp): ")
- (save-excursion
- (while (and (not (eobp))
- (re-search-forward regexp nil t))
- (delete-region (save-excursion (goto-char (match-beginning 0))
- (beginning-of-line)
- (point))
- (progn (forward-line 1) (point))))))
-
- (fset 'count-matches 'how-many)
- (defun how-many (regexp)
- "Print number of matches for REGEXP following point."
- (interactive "sHow many matches for (regexp): ")
- (let ((count 0) (opoint -1))
- (save-excursion
- ;; If we did forward-char on the previous loop,
- ;; and that brought us to eof, search anyway.
- (while (and (or (not (eobp)) (/= opoint (point)))
- (re-search-forward regexp nil t))
- (if (prog1 (= opoint (point)) (setq opoint (point)))
- (forward-char 1)
- (setq count (1+ count))))
- (message "%d occurrences" count))))
-
- (defvar occur-mode-map ())
- (if occur-mode-map
- ()
- (setq occur-mode-map (make-sparse-keymap))
- (define-key occur-mode-map "\C-c\C-c" 'occur-mode-goto-occurrence))
-
- (defvar occur-buffer nil)
- (defvar occur-nlines nil)
- (defvar occur-pos-list nil)
-
- (defun occur-mode ()
- "Major mode for output from \\[occur].
- Move point to one of the occurrences in this buffer,
- then use \\[occur-mode-goto-occurrence] to go to the same occurrence
- in the buffer that the occurrences were found in.
- \\{occur-mode-map}"
- (kill-all-local-variables)
- (use-local-map occur-mode-map)
- (setq major-mode 'occur-mode)
- (setq mode-name "Occur")
- (make-local-variable 'occur-buffer)
- (make-local-variable 'occur-nlines)
- (make-local-variable 'occur-pos-list))
-
- (defun occur-mode-goto-occurrence ()
- "Go to the line this occurrence was found in, in the buffer it was found in."
- (interactive)
- (if (or (null occur-buffer)
- (null (buffer-name occur-buffer)))
- (progn
- (setq occur-buffer nil
- occur-pos-list nil)
- (error "Buffer in which occurences were found is deleted.")))
- (let* ((occur-number (save-excursion
- (beginning-of-line)
- (/ (1- (count-lines (point-min) (point)))
- (cond ((< occur-nlines 0)
- (- 2 occur-nlines))
- ((> occur-nlines 0)
- (+ 2 (* 2 occur-nlines)))
- (t 1)))))
- (pos (nth occur-number occur-pos-list)))
- (pop-to-buffer occur-buffer)
- (goto-char (marker-position pos))))
-
- (defvar list-matching-lines-default-context-lines 0
- "*Default number of context lines to include around a list-matching-lines
- match. A negative number means to include that many lines before the match.
- A positive number means to include that many lines both before and after.")
-
- (fset 'list-matching-lines 'occur)
- (defun occur (regexp &optional nlines)
- "Show all lines following point containing a match for REGEXP.
- Display each line with NLINES lines before and after,
- or -NLINES before if NLINES is negative.
- NLINES defaults to list-matching-lines-default-context-lines.
- Interactively it is the prefix arg.
-
- The lines are shown in a buffer named *Occur*.
- It serves as a menu to find any of the occurrences in this buffer.
- \\[describe-mode] in that buffer will explain how."
- (interactive "sList lines matching regexp: \nP")
- (setq nlines (if nlines (prefix-numeric-value nlines)
- list-matching-lines-default-context-lines))
- (let ((first t)
- (buffer (current-buffer))
- linenum prevpos)
- (save-excursion
- (beginning-of-line)
- (setq linenum (1+ (count-lines (point-min) (point))))
- (setq prevpos (point)))
- (with-output-to-temp-buffer "*Occur*"
- (save-excursion
- (set-buffer standard-output)
- (insert "Lines matching ")
- (prin1 regexp)
- (insert " in buffer " (buffer-name buffer) ?. ?\n)
- (occur-mode)
- (setq occur-buffer buffer)
- (setq occur-nlines nlines)
- (setq occur-pos-list ()))
- (if (eq buffer standard-output)
- (goto-char (point-max)))
- (save-excursion
- ;; Find next match, but give up if prev match was at end of buffer.
- (while (and (not (= prevpos (point-max)))
- (re-search-forward regexp nil t))
- (beginning-of-line 1)
- (save-excursion
- (setq linenum (+ linenum (count-lines prevpos (point))))
- (setq prevpos (point)))
- (let* ((start (save-excursion
- (forward-line (if (< nlines 0) nlines (- nlines)))
- (point)))
- (end (save-excursion
- (if (> nlines 0)
- (forward-line (1+ nlines))
- (forward-line 1))
- (point)))
- (tag (format "%3d" linenum))
- (empty (make-string (length tag) ?\ ))
- tem)
- (save-excursion
- (setq tem (make-marker))
- (set-marker tem (point))
- (set-buffer standard-output)
- (setq occur-pos-list (cons tem occur-pos-list))
- (or first (zerop nlines)
- (insert "--------\n"))
- (setq first nil)
- (insert-buffer-substring buffer start end)
- (backward-char (- end start))
- (setq tem (if (< nlines 0) (- nlines) nlines))
- (while (> tem 0)
- (insert empty ?:)
- (forward-line 1)
- (setq tem (1- tem)))
- (insert tag ?:)
- (forward-line 1)
- (while (< tem nlines)
- (insert empty ?:)
- (forward-line 1)
- (setq tem (1+ tem))))
- (forward-line 1)))
- (set-buffer standard-output)
- ;; Put positions in increasing order to go with buffer.
- (setq occur-pos-list (nreverse occur-pos-list))
- (if (interactive-p)
- (message "%d matching lines." (length occur-pos-list)))))))
-
- (defconst query-replace-help
- "Type Space or `y' to replace one match, Delete or `n' to skip to next,
- ESC or `q' to exit, Period to replace one match and exit,
- Comma to replace but not move point immediately,
- C-r to enter recursive edit (\\[exit-recursive-edit] to get out again),
- C-w to delete match and recursive edit,
- C-l to clear the screen, redisplay, and offer same replacement again,
- ! to replace all remaining matches with no more questions,
- ^ to move point back to previous match.
-
- Type a Space now to remove this message."
- "Help message while in query-replace")
-
- (defun perform-replace (from-string to-string
- query-flag regexp-flag delimited-flag)
- (let ((nocasify (not (and case-fold-search case-replace
- (string-equal from-string
- (downcase from-string)))))
- (literal (not regexp-flag))
- (search-function (if regexp-flag 're-search-forward 'search-forward))
- (search-string from-string)
- (keep-going t)
- (lastrepl nil)) ;Position after last match considered.
- (if delimited-flag
- (setq search-function 're-search-forward
- search-string (concat "\\b"
- (if regexp-flag from-string
- (regexp-quote from-string))
- "\\b")))
- (push-mark)
- (push-mark)
- (while (and keep-going
- (not (eobp))
- (progn
- (set-mark (point))
- (funcall search-function search-string nil t)))
- ;; Don't replace the null string
- ;; right after end of previous replacement.
- (if (eq lastrepl (point))
- (forward-char 1)
- (undo-boundary)
- (if (not query-flag)
- (replace-match to-string nocasify literal)
- (let (done replaced)
- (while (not done)
- ;; Preserve the match data. Process filters and sentinels
- ;; could run inside read-char..
- (let ((data (match-data))
- (help-form
- '(concat "Query replacing "
- (if regexp-flag "regexp " "")
- from-string " with " to-string ".\n\n"
- (substitute-command-keys query-replace-help))))
- (setq char help-char)
- (while (= char help-char)
- (message "Query replacing %s with %s: " from-string to-string)
- (setq char (read-char))
- (if (= char ??)
- (setq unread-command-char help-char char help-char)))
- (store-match-data data))
- (cond ((or (= char ?\e)
- (= char ?q))
- (setq keep-going nil)
- (setq done t))
- ((= char ?^)
- (goto-char (mark))
- (setq replaced t))
- ((or (= char ?\ )
- (= char ?y))
- (or replaced
- (replace-match to-string nocasify literal))
- (setq done t))
- ((= char ?\.)
- (or replaced
- (replace-match to-string nocasify literal))
- (setq keep-going nil)
- (setq done t))
- ((= char ?\,)
- (if (not replaced)
- (progn
- (replace-match to-string nocasify literal)
- (setq replaced t))))
- ((= char ?!)
- (or replaced
- (replace-match to-string nocasify literal))
- (setq done t query-flag nil))
- ((or (= char ?\177)
- (= char ?n))
- (setq done t))
- ((= char ?\C-l)
- (recenter nil))
- ((= char ?\C-r)
- (store-match-data
- (prog1 (match-data)
- (save-excursion (recursive-edit)))))
- ((= char ?\C-w)
- (delete-region (match-beginning 0) (match-end 0))
- (store-match-data
- (prog1 (match-data)
- (save-excursion (recursive-edit))))
- (setq replaced t))
- (t
- (setq keep-going nil)
- (setq unread-command-char char)
- (setq done t))))))
- (setq lastrepl (point))))
- (pop-mark)
- keep-going))
-
-