;;; smerge-mode.el --- Minor mode to resolve diff3 conflicts
-;; Copyright (C) 1999, 2000, 01, 03, 2004 Free Software Foundation, Inc.
+;; Copyright (C) 1999, 2000, 2001, 2002, 2003,
+;; 2004, 2005 Free Software Foundation, Inc.
;; Author: Stefan Monnier <monnier@cs.yale.edu>
;; Keywords: revision-control merge diff3 cvs conflict
;; 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, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
(eval-when-compile (require 'cl))
+;;; The real definition comes later.
+(defvar smerge-mode)
+
(defgroup smerge ()
- "Minor mode to resolve diff3 conflicts."
+ "Minor mode to highlight and resolve diff3 conflicts."
:group 'tools
:prefix "smerge-")
(defcustom smerge-diff-switches
(append '("-d" "-b")
(if (listp diff-switches) diff-switches (list diff-switches)))
- "*A list of strings specifying switches to be be passed to diff.
+ "A list of strings specifying switches to be passed to diff.
Used in `smerge-diff-base-mine' and related functions."
:group 'smerge
:type '(repeat string))
(defcustom smerge-auto-leave t
- "*Non-nil means to leave `smerge-mode' when the last conflict is resolved."
+ "Non-nil means to leave `smerge-mode' when the last conflict is resolved."
:group 'smerge
:type 'boolean)
-(defface smerge-mine-face
- '((((background light))
+(defface smerge-mine
+ '((((min-colors 88) (background light))
+ (:foreground "blue1"))
+ (((background light))
(:foreground "blue"))
+ (((min-colors 88) (background dark))
+ (:foreground "cyan1"))
(((background dark))
(:foreground "cyan")))
"Face for your code."
:group 'smerge)
-(defvar smerge-mine-face 'smerge-mine-face)
+;; backward-compatibility alias
+(put 'smerge-mine-face 'face-alias 'smerge-mine)
+(defvar smerge-mine-face 'smerge-mine)
-(defface smerge-other-face
+(defface smerge-other
'((((background light))
(:foreground "darkgreen"))
(((background dark))
(:foreground "lightgreen")))
"Face for the other code."
:group 'smerge)
-(defvar smerge-other-face 'smerge-other-face)
-
-(defface smerge-base-face
- '((((background light))
+;; backward-compatibility alias
+(put 'smerge-other-face 'face-alias 'smerge-other)
+(defvar smerge-other-face 'smerge-other)
+
+(defface smerge-base
+ '((((min-colors 88) (background light))
+ (:foreground "red1"))
+ (((background light))
(:foreground "red"))
(((background dark))
(:foreground "orange")))
"Face for the base code."
:group 'smerge)
-(defvar smerge-base-face 'smerge-base-face)
+;; backward-compatibility alias
+(put 'smerge-base-face 'face-alias 'smerge-base)
+(defvar smerge-base-face 'smerge-base)
-(defface smerge-markers-face
+(defface smerge-markers
'((((background light))
(:background "grey85"))
(((background dark))
(:background "grey30")))
"Face for the conflict markers."
:group 'smerge)
-(defvar smerge-markers-face 'smerge-markers-face)
+;; backward-compatibility alias
+(put 'smerge-markers-face 'face-alias 'smerge-markers)
+(defvar smerge-markers-face 'smerge-markers)
(easy-mmode-defmap smerge-basic-map
`(("n" . smerge-next)
("o" . smerge-keep-other)
("m" . smerge-keep-mine)
("E" . smerge-ediff)
+ ("C" . smerge-combine-with-next)
("\C-m" . smerge-keep-current)
("=" . ,(make-sparse-keymap "Diff"))
("=<" "base-mine" . smerge-diff-base-mine)
:help "Use Ediff to resolve the conflicts"
:active (smerge-check 1)]
["Auto Resolve" smerge-resolve
- :help "Use mode-provided resolution function"
- :active (and (smerge-check 1) (local-variable-p 'smerge-resolve-function))]
+ :help "Try auto-resolution heuristics"
+ :active (smerge-check 1)]
["Combine" smerge-combine-with-next
:help "Combine current conflict with next"
:active (smerge-check 1)]
))
-(easy-mmode-defmap smerge-context-menu-map
- `(([down-mouse-3] . smerge-activate-context-menu))
- "Keymap for context menu appeared on conflicts area.")
(easy-menu-define smerge-context-menu nil
"Context menu for mine area in `smerge-mode'."
'(nil
(defun smerge-ensure-match (n)
(unless (match-end n)
- (error (format "No `%s'" (aref smerge-match-names n)))))
+ (error "No `%s'" (aref smerge-match-names n))))
(defun smerge-auto-leave ()
(when (and smerge-auto-leave
(save-excursion (goto-char (point-min))
(not (re-search-forward smerge-begin-re nil t))))
+ (when (and (listp buffer-undo-list) smerge-mode)
+ (push (list 'apply 'smerge-mode 1) buffer-undo-list))
(smerge-mode -1)))
(defun smerge-keep-all ()
- "Keep all three versions.
-Convenient for the kind of conflicts that can arise in ChangeLog files."
+ "Concatenate all versions."
(interactive)
(smerge-match-conflict)
- (replace-match (concat (or (match-string 1) "")
- (or (match-string 2) "")
- (or (match-string 3) ""))
- t t)
- (smerge-auto-leave))
+ (let ((mb2 (or (match-beginning 2) (point-max)))
+ (me2 (or (match-end 2) (point-min))))
+ (delete-region (match-end 3) (match-end 0))
+ (delete-region (max me2 (match-end 1)) (match-beginning 3))
+ (if (and (match-end 2) (/= (match-end 1) (match-end 3)))
+ (delete-region (match-end 1) (match-beginning 2)))
+ (delete-region (match-beginning 0) (min (match-beginning 1) mb2))
+ (smerge-auto-leave)))
+
+(defun smerge-keep-n (n)
+ ;; We used to use replace-match, but that did not preserve markers so well.
+ (delete-region (match-end n) (match-end 0))
+ (delete-region (match-beginning 0) (match-beginning n)))
(defun smerge-combine-with-next ()
"Combine the current conflict with the next one."
"Mode-specific merge function.
The function is called with no argument and with the match data set
according to `smerge-match-conflict'.")
+(add-to-list 'debug-ignored-errors "Don't know how to resolve")
(defvar smerge-text-properties
`(help-echo "merge conflict: mouse-3 shows a menu"
keymap (keymap (down-mouse-3 . smerge-popup-context-menu))))
(defun smerge-remove-props (&optional beg end)
- (remove-text-properties
- (or beg (match-beginning 0))
- (or end (match-end 0))
- smerge-text-properties))
+ (remove-overlays beg end 'smerge 'conflict))
(defun smerge-popup-context-menu (event)
"Pop up the Smerge mode context menu under mouse."
(interactive "e")
(if (and smerge-mode
- (save-excursion (mouse-set-point event) (smerge-check 1)))
+ (save-excursion (posn-set-point (event-end event)) (smerge-check 1)))
(progn
- (mouse-set-point event)
- (smerge-match-conflict)
- (let ((i (smerge-get-current))
- o)
- (if (<= i 0)
- ;; Out of range
- (popup-menu smerge-mode-menu)
- ;; Install overlay.
- (setq o (make-overlay (match-beginning i) (match-end i)))
- (overlay-put o 'face 'highlight)
- (sit-for 0)
- (popup-menu (if (smerge-check 2)
- smerge-mode-menu
- smerge-context-menu))
- ;; Delete overlay.
- (delete-overlay o))))
+ (posn-set-point (event-end event))
+ (smerge-match-conflict)
+ (let ((i (smerge-get-current))
+ o)
+ (if (<= i 0)
+ ;; Out of range
+ (popup-menu smerge-mode-menu)
+ ;; Install overlay.
+ (setq o (make-overlay (match-beginning i) (match-end i)))
+ (unwind-protect
+ (progn
+ (overlay-put o 'face 'highlight)
+ (sit-for 0) ;Display the new highlighting.
+ (popup-menu smerge-context-menu))
+ ;; Delete overlay.
+ (delete-overlay o)))))
;; There's no conflict at point, the text-props are just obsolete.
(save-excursion
(let ((beg (re-search-backward smerge-end-re nil t))
- (end (re-search-forward smerge-begin-re nil t)))
- (smerge-remove-props (or beg (point-min)) (or end (point-max)))
- (push event unread-command-events)))))
+ (end (re-search-forward smerge-begin-re nil t)))
+ (smerge-remove-props (or beg (point-min)) (or end (point-max)))
+ (push event unread-command-events)))))
(defun smerge-resolve ()
"Resolve the conflict at point intelligently.
(interactive)
(smerge-match-conflict)
(smerge-remove-props)
- (funcall smerge-resolve-function)
+ (cond
+ ;; Trivial diff3 -A non-conflicts.
+ ((and (eq (match-end 1) (match-end 3))
+ (eq (match-beginning 1) (match-beginning 3)))
+ (smerge-keep-n 3))
+ ;; Mode-specific conflict resolution.
+ ((condition-case nil
+ (atomic-change-group
+ (funcall smerge-resolve-function)
+ t)
+ (error nil))
+ ;; Nothing to do: the resolution function has done it already.
+ nil)
+ ;; FIXME: Add "if [ diff -b MINE OTHER ]; then select OTHER; fi"
+ ((and (match-end 2)
+ ;; FIXME: Add "diff -b BASE MINE | patch OTHER".
+ ;; FIXME: Add "diff -b BASE OTHER | patch MINE".
+ nil)
+ )
+ ((and (not (match-end 2))
+ ;; FIXME: Add "diff -b"-based refinement.
+ nil)
+ )
+ (t
+ (error "Don't know how to resolve")))
(smerge-auto-leave))
(defun smerge-keep-base ()
(smerge-match-conflict)
(smerge-ensure-match 2)
(smerge-remove-props)
- (replace-match (match-string 2) t t)
+ (smerge-keep-n 2)
(smerge-auto-leave))
(defun smerge-keep-other ()
(smerge-match-conflict)
;;(smerge-ensure-match 3)
(smerge-remove-props)
- (replace-match (match-string 3) t t)
+ (smerge-keep-n 3)
(smerge-auto-leave))
(defun smerge-keep-mine ()
(smerge-match-conflict)
;;(smerge-ensure-match 1)
(smerge-remove-props)
- (replace-match (match-string 1) t t)
+ (smerge-keep-n 1)
(smerge-auto-leave))
(defun smerge-get-current ()
(let ((i (smerge-get-current)))
(if (<= i 0) (error "Not inside a version")
(smerge-remove-props)
- (replace-match (match-string i) t t)
+ (smerge-keep-n i)
(smerge-auto-leave))))
(defun smerge-kill-current ()
(let ((i (smerge-get-current)))
(if (<= i 0) (error "Not inside a version")
(smerge-remove-props)
- (replace-match (mapconcat
- (lambda (j)
- (match-string j))
- (remove i '(1 2 3)) "") t t)
- (smerge-auto-leave))))
+ (let ((left nil))
+ (dolist (n '(3 2 1))
+ (if (and (match-end n) (/= (match-end n) (match-end i)))
+ (push n left)))
+ (if (and (cdr left)
+ (/= (match-end (car left)) (match-end (cadr left))))
+ (ding) ;We don't know how to do that.
+ (smerge-keep-n (car left))
+ (smerge-auto-leave))))))
(defun smerge-diff-base-mine ()
"Diff 'base' and 'mine' version in current conflict region."
;; handle the various conflict styles
(cond
+ ((save-excursion
+ (goto-char mine-start)
+ (re-search-forward smerge-begin-re end t))
+ ;; There's a nested conflict and we're after the the beginning
+ ;; of the outer one but before the beginning of the inner one.
+ ;; Of course, maybe this is not a nested conflict but in that
+ ;; case it can only be something nastier that we don't know how
+ ;; to handle, so may as well arbitrarily decide to treat it as
+ ;; a nested conflict. --Stef
+ (error "There is a nested conflict"))
+
((re-search-backward smerge-base-re start t)
;; a 3-parts conflict
(set (make-local-variable 'smerge-conflict-style) 'diff3-A)
(setq mine-start other-start)
(setq mine-end other-end)))
- (let ((inhibit-read-only t)
- (inhibit-modification-hooks t)
- (m (buffer-modified-p)))
- (unwind-protect
- (add-text-properties start end smerge-text-properties)
- (restore-buffer-modified-p m)))
-
(store-match-data (list start end
mine-start mine-end
base-start base-end
t)
(search-failed (error "Point not in conflict region")))))
+(defun smerge-conflict-overlay (pos)
+ "Return the conflict overlay at POS if any."
+ (let ((ols (overlays-at pos))
+ conflict)
+ (dolist (ol ols)
+ (if (and (eq (overlay-get ol 'smerge) 'conflict)
+ (> (overlay-end ol) pos))
+ (setq conflict ol)))
+ conflict))
+
(defun smerge-find-conflict (&optional limit)
"Find and match a conflict region. Intended as a font-lock MATCHER.
The submatches are the same as in `smerge-match-conflict'.
-Returns non-nil if a match is found between the point and LIMIT.
-The point is moved to the end of the conflict."
- (when (re-search-forward smerge-begin-re limit t)
- (ignore-errors
- (smerge-match-conflict)
- (goto-char (match-end 0)))))
+Returns non-nil if a match is found between point and LIMIT.
+Point is moved to the end of the conflict."
+ (let ((found nil)
+ (pos (point))
+ conflict)
+ ;; First check to see if point is already inside a conflict, using
+ ;; the conflict overlays.
+ (while (and (not found) (setq conflict (smerge-conflict-overlay pos)))
+ ;; Check the overlay's validity and kill it if it's out of date.
+ (condition-case nil
+ (progn
+ (goto-char (overlay-start conflict))
+ (smerge-match-conflict)
+ (goto-char (match-end 0))
+ (if (<= (point) pos)
+ (error "Matching backward!")
+ (setq found t)))
+ (error (smerge-remove-props
+ (overlay-start conflict) (overlay-end conflict))
+ (goto-char pos))))
+ ;; If we're not already inside a conflict, look for the next conflict
+ ;; and add/update its overlay.
+ (while (and (not found) (re-search-forward smerge-begin-re limit t))
+ (condition-case nil
+ (progn
+ (smerge-match-conflict)
+ (goto-char (match-end 0))
+ (let ((conflict (smerge-conflict-overlay (1- (point)))))
+ (if conflict
+ ;; Update its location, just in case it got messed up.
+ (move-overlay conflict (match-beginning 0) (match-end 0))
+ (setq conflict (make-overlay (match-beginning 0) (match-end 0)
+ nil 'front-advance nil))
+ (overlay-put conflict 'evaporate t)
+ (overlay-put conflict 'smerge 'conflict)
+ (let ((props smerge-text-properties))
+ (while props
+ (overlay-put conflict (pop props) (pop props))))))
+ (setq found t))
+ (error nil)))
+ found))
(defun smerge-diff (n1 n2)
(smerge-match-conflict)
(file1 (make-temp-file "smerge1"))
(file2 (make-temp-file "smerge2"))
(dir default-directory)
- (file (file-relative-name buffer-file-name))
+ (file (if buffer-file-name (file-relative-name buffer-file-name)))
+ ;; We would want to use `emacs-mule-unix' for read&write, but we
+ ;; bump into problems with the coding-system used by diff to write
+ ;; the file names and the time stamps in the header.
+ ;; `buffer-file-coding-system' is not always correct either, but if
+ ;; the OS/user uses only one coding-system, then it works.
(coding-system-for-read buffer-file-coding-system))
(write-region beg1 end1 file1 nil 'nomessage)
(write-region beg2 end2 file2 nil 'nomessage)
(defvar ediff-buffer-A)
(defvar ediff-buffer-B)
(defvar ediff-buffer-C)
+(defvar ediff-ancestor-buffer)
+(defvar ediff-quit-hook)
;;;###autoload
(defun smerge-ediff (&optional name-mine name-other name-base)
(goto-char (point-min))
(while (smerge-find-conflict)
(when (match-beginning 2) (setq base t))
- (replace-match (match-string 1) t t))
+ (smerge-keep-n 1))
(buffer-enable-undo)
(set-buffer-modified-p nil)
(funcall mode))
(insert-buffer-substring buf)
(goto-char (point-min))
(while (smerge-find-conflict)
- (replace-match (match-string 3) t t))
+ (smerge-keep-n 3))
(buffer-enable-undo)
(set-buffer-modified-p nil)
(funcall mode))
(insert-buffer-substring buf)
(goto-char (point-min))
(while (smerge-find-conflict)
- (replace-match (or (match-string 2) "") t t))
+ (if (match-end 2)
+ (smerge-keep-n 2)
+ (delete-region (match-beginning 0) (match-end 0))))
(buffer-enable-undo)
(set-buffer-modified-p nil)
(funcall mode)))
(ediff-cleanup-mess)
(with-current-buffer buf
(erase-buffer)
- (insert-buffer buffer-C)
+ (insert-buffer-substring buffer-C)
(kill-buffer buffer-A)
(kill-buffer buffer-B)
(kill-buffer buffer-C)
(define-minor-mode smerge-mode
"Minor mode to simplify editing output from the diff3 program.
\\{smerge-mode-map}"
- nil " SMerge" nil
+ :group 'smerge :lighter " SMerge"
(when (and (boundp 'font-lock-mode) font-lock-mode)
- (set (make-local-variable 'font-lock-multiline) t)
(save-excursion
(if smerge-mode
(font-lock-add-keywords nil smerge-font-lock-keywords 'append)
(goto-char (point-min))
(while (smerge-find-conflict)
(save-excursion
- (font-lock-fontify-region (match-beginning 0) (match-end 0) nil))))))
+ (font-lock-fontify-region (match-beginning 0) (match-end 0) nil)))))
+ (unless smerge-mode
+ (smerge-remove-props (point-min) (point-max))))
(provide 'smerge-mode)
-;;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
+;; arch-tag: 605c8d1e-e43d-4943-a6f3-1bcc4333e690
;;; smerge-mode.el ends here