Source

ediff / ediff-merg.el

steve c7a6385 

michaelk f394ce2 
michaelk c04eef4 
steve c7a6385 
michaelk 9245301 
steve c7a6385 


michaelk 34f7118 
steve c7a6385 
michaelk 34f7118 

steve c7a6385 






michaelk 34f7118 
steve c7a6385 
michaelk 3b3ace8 

steve c7a6385 










michaelk 34f7118 
steve c7a6385 




michaelk c04eef4 
steve c7a6385 





michaelk c04eef4 
steve c7a6385 



michaelk 04b34de 
michaelk d8514db 
michaelk c04eef4 
michaelk 04b34de 
michaelk 2bedfec 
michaelk d8514db 


steve c7a6385 



michaelk d8514db 

steve c7a6385 
michaelk d8514db 
steve c7a6385 
michaelk d8514db 

steve c7a6385 

michaelk 525d217 
michaelk c04eef4 
steve c7a6385 
michaelk 2bedfec 
michaelk 525d217 





michaelk c04eef4 
michaelk 525d217 


michaelk 04b34de 
michaelk 525d217 






steve c7a6385 
michaelk f541e5a 
michaelk 9f6bf3f 
michaelk c04eef4 
michaelk 9f6bf3f 


michaelk f541e5a 
steve c7a6385 

michaelk c04eef4 


michaelk f541e5a 
steve c7a6385 
michaelk 525d217 


michaelk 04b34de 
michaelk c04eef4 


michaelk 525d217 


michaelk d8514db 




michaelk 9245301 
steve c7a6385 
michaelk d8514db 








michaelk 9245301 
michaelk d8514db 


michaelk 04b34de 
michaelk d8514db 
















steve c7a6385 





michaelk 04b34de 
steve c7a6385 



























michaelk 04b34de 
steve c7a6385 



michaelk 04b34de 
steve c7a6385 




















michaelk 04b34de 
steve c7a6385 


michaelk 9245301 


kifer-guest 13f06b6 
michaelk 04b34de 
steve c7a6385 
michaelk 525d217 

steve c7a6385 
michaelk 525d217 
steve c7a6385 
michaelk 04b34de 
steve c7a6385 





michaelk 04b34de 
steve c7a6385 


michaelk 04b34de 
steve c7a6385 




michaelk 04b34de 
steve c7a6385 



michaelk 04b34de 
steve c7a6385 

michaelk 525d217 
steve c7a6385 







michaelk 04b34de 
michaelk 525d217 
steve c7a6385 




michaelk 04b34de 
steve c7a6385 
























michaelk 525d217 
steve c7a6385 

michaelk 525d217 
steve c7a6385 



michaelk 04b34de 
michaelk 9245301 
michaelk d8514db 



michaelk 04b34de 
steve c7a6385 

michaelk 04b34de 
steve c7a6385 

michaelk 525d217 
michaelk d8514db 

steve c7a6385 




michaelk d8514db 



michaelk 04b34de 
steve c7a6385 

michaelk d8514db 
















michaelk 0594a57 
michaelk 34f7118 
michaelk 525d217 










michaelk 04b34de 
michaelk 525d217 





michaelk d8514db 

michaelk 525d217 






michaelk 04b34de 
steve c7a6385 
michaelk d81f8fe 


michaelk c04eef4 




steve c7a6385 
michaelk 34f7118 
michaelk 3b3ace8 
;;; ediff-merg.el --- merging utilities

;; Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
;;   2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.

;; Author: Michael Kifer <kifer@cs.stonybrook.edu>

;; 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;;; Code:


;; compiler pacifier
(defvar ediff-window-A)
(defvar ediff-window-B)
(defvar ediff-window-C)
(defvar ediff-merge-window-share)
(defvar ediff-window-config-saved)

(eval-when-compile
  (require 'ediff-util))
;; end pacifier

(require 'ediff-init)

(defcustom ediff-quit-merge-hook 'ediff-maybe-save-and-delete-merge
  "Hooks to run before quitting a merge job.
The most common use is to save and delete the merge buffer."
  :type 'hook
  :group 'ediff-merge)


(defcustom ediff-default-variant 'combined
  "The variant to be used as a default for buffer C in merging.
Valid values are the symbols `default-A', `default-B', and `combined'."
  :type '(radio (const default-A) (const default-B) (const combined))
  :group 'ediff-merge)

(defcustom ediff-combination-pattern
  '("<<<<<<< variant A" A ">>>>>>> variant B" B  "####### Ancestor" Ancestor "======= end")
  "Pattern to be used for combining difference regions in buffers A and B.
The value must be a list of the form
\(STRING1 bufspec1  STRING2 bufspec2 STRING3 bufspec3 STRING4)
where bufspec is the symbol A, B, or Ancestor. For instance, if the value is
'(STRING1 A  STRING2 Ancestor STRING3 B STRING4) then the
combined text will look like this:

STRING1
diff region from variant A
STRING2
diff region from the ancestor
STRING3
diff region from variant B
STRING4
"
  :type '(choice (list string symbol string symbol string)
		 (list string symbol string symbol string symbol string))
  :group 'ediff-merge)

(defcustom ediff-show-clashes-only nil
  "If t, show only those diff regions where both buffers disagree with the ancestor.
This means that regions that have status prefer-A or prefer-B will be
skipped over.  A value of nil means show all regions."
  :type 'boolean
  :group 'ediff-merge
  )
(make-variable-buffer-local 'ediff-show-clashes-only)

(defcustom ediff-skip-merge-regions-that-differ-from-default nil
  "If t, show only the regions that have not been changed by the user.
A region is considered to have been changed if it is different from the current
default (`default-A', `default-B', `combined') and it hasn't been marked as
`prefer-A' or `prefer-B'.
A region is considered to have been changed also when it is marked as
as `prefer-A', but is different from the corresponding difference region in
Buffer A or if it is marked as `prefer-B' and is different from the region in
Buffer B."
  :type 'boolean
  :group 'ediff-merge
  )
(make-variable-buffer-local 'ediff-skip-merge-regions-that-differ-from-default)

;; check if there is no clash between the ancestor and one of the variants.
;; if it is not a merge job then return true
(defun ediff-merge-region-is-non-clash (n)
  (if (ediff-merge-job)
      (string-match "prefer" (or (ediff-get-state-of-merge n) ""))
    t))

;; If ediff-show-clashes-only, check if there is no clash between the ancestor
;; and one of the variants.
(defun ediff-merge-region-is-non-clash-to-skip (n)
  (and (ediff-merge-job)
       ediff-show-clashes-only
       (ediff-merge-region-is-non-clash n)))

;; If ediff-skip-changed-regions, check if the merge region differs from
;; the current default. If a region is different from the default, it means
;; that the user has made determination as to how to merge for this particular
;; region.
(defun ediff-skip-merge-region-if-changed-from-default-p (n)
  (and (ediff-merge-job)
       ediff-skip-merge-regions-that-differ-from-default
       (ediff-merge-changed-from-default-p n 'prefers-too)))


(defun ediff-get-combined-region (n)
  (let ((pattern-list ediff-combination-pattern)
	(combo-region "")
	(err-msg
	 "ediff-combination-pattern: Invalid format. Please consult the documentation")
	region-delim region-spec)

    (if (< (length pattern-list) 5)
	(error err-msg))

    (while (> (length pattern-list) 2)
      (setq region-delim (nth 0 pattern-list)
	    region-spec (nth 1 pattern-list))
      (or (and (stringp region-delim) (memq region-spec '(A B Ancestor)))
	  (error err-msg))

      (condition-case nil
	  (setq combo-region
		(concat combo-region
			region-delim "\n"
			(ediff-get-region-contents
			 n region-spec ediff-control-buffer)))
	(error ""))
      (setq pattern-list (cdr (cdr pattern-list)))
      )

    (setq region-delim (nth 0 pattern-list))
    (or (stringp region-delim)
	(error err-msg))
    (setq combo-region (concat combo-region region-delim "\n"))
  ))

;;(defsubst ediff-make-combined-diff (regA regB)
;;  (concat (nth 0 ediff-combination-pattern) "\n"
;;	  regA
;;	  (nth 1 ediff-combination-pattern) "\n"
;;	  regB
;;	  (nth 2 ediff-combination-pattern) "\n"))

(defsubst ediff-set-state-of-all-diffs-in-all-buffers (ctl-buf)
  (let ((n 0))
    (while (< n ediff-number-of-differences)
      (ediff-set-state-of-diff-in-all-buffers n ctl-buf)
      (setq n (1+ n)))))

(defun ediff-set-state-of-diff-in-all-buffers (n ctl-buf)
  (let ((regA (ediff-get-region-contents n 'A ctl-buf))
	(regB (ediff-get-region-contents n 'B ctl-buf))
	(regC (ediff-get-region-contents n 'C ctl-buf)))
    (cond ((and (string= regA regB) (string= regA  regC))
	   (ediff-set-state-of-diff n 'A "=diff(B)")
	   (ediff-set-state-of-diff n 'B "=diff(C)")
	   (ediff-set-state-of-diff n 'C "=diff(A)"))
	  ((string= regA regB)
	   (ediff-set-state-of-diff n 'A "=diff(B)")
	   (ediff-set-state-of-diff n 'B "=diff(A)")
	   (ediff-set-state-of-diff n 'C nil))
	  ((string= regA regC)
	   (ediff-set-state-of-diff n 'A "=diff(C)")
	   (ediff-set-state-of-diff n 'C "=diff(A)")
	   (ediff-set-state-of-diff n 'B nil))
	  ((string= regB regC)
	   (ediff-set-state-of-diff n 'C "=diff(B)")
	   (ediff-set-state-of-diff n 'B "=diff(C)")
	   (ediff-set-state-of-diff n 'A nil))
	  ((string= regC (ediff-get-combined-region n))
	   (ediff-set-state-of-diff n 'A nil)
	     (ediff-set-state-of-diff n 'B nil)
	     (ediff-set-state-of-diff n 'C "=diff(A+B)"))
	  (t (ediff-set-state-of-diff n 'A nil)
	     (ediff-set-state-of-diff n 'B nil)
	     (ediff-set-state-of-diff n 'C nil)))
    ))

(defun ediff-set-merge-mode ()
  (normal-mode t)
  (remove-hook 'local-write-file-hooks 'ediff-set-merge-mode))


;; Go over all diffs starting with DIFF-NUM and copy regions into buffer C
;; according to the state of the difference.
;; Since ediff-copy-diff refuses to copy identical diff regions, there is
;; no need to optimize ediff-do-merge any further.
;;
;; If re-merging, change state of merge in all diffs starting with
;; DIFF-NUM, except those where the state is prefer-* or where it is
;; `default-*' or `combined' but the buf C region appears to be modified
;; since last set by default.
(defun ediff-do-merge (diff-num &optional remerging)
  (if (< diff-num 0) (setq diff-num 0))
  (let ((n diff-num)
	;;(default-state-of-merge (format "%S" ediff-default-variant))
	do-not-copy state-of-merge)
    (while (< n ediff-number-of-differences)
      (setq do-not-copy nil) ; reset after each cycle
      (if (= (mod n 10) 0)
	  (message "%s buffers A & B into C ... region %d of %d"
		   (if remerging "Re-merging" "Merging")
		   n
		   ediff-number-of-differences))

      (setq state-of-merge (ediff-get-state-of-merge n))

      (if remerging
	  ;;(let ((reg-A (ediff-get-region-contents n 'A ediff-control-buffer))
	  ;;	(reg-B (ediff-get-region-contents n 'B ediff-control-buffer))
	  ;;	(reg-C (ediff-get-region-contents n 'C ediff-control-buffer)))
	  (progn

	    ;; if region was edited since it was first set by default
	    (if (or (ediff-merge-changed-from-default-p n)
		    ;; was preferred
		    (string-match "prefer" state-of-merge))
		;; then ignore
		(setq do-not-copy t))

	    ;; change state of merge for this diff, if necessary
	    (if (and (string-match "\\(default\\|combined\\)" state-of-merge)
		     (not do-not-copy))
		(ediff-set-state-of-merge
		 n (format "%S" ediff-default-variant)))
	    ))

      ;; state-of-merge may have changed via ediff-set-state-of-merge, so
      ;; check it once again
      (setq state-of-merge (ediff-get-state-of-merge n))

      (or do-not-copy
	  (if (string= state-of-merge "combined")
	      ;; use n+1 because ediff-combine-diffs works via user numbering
	      ;; of diffs, which is 1+ to what ediff uses internally
	      (ediff-combine-diffs (1+ n) 'batch)
	    (ediff-copy-diff
	     n (if (string-match "-A" state-of-merge) 'A 'B) 'C 'batch)))
      (setq n (1+ n)))
    (message "Merging buffers A & B into C ... Done")
    ))


(defun ediff-re-merge ()
  "Remerge unmodified diff regions using a new default.  Start with the current region."
  (interactive)
  (let* ((default-variant-alist
	   (list '("default-A") '("default-B") '("combined")))
	 (actual-alist
	  (delete (list (symbol-name ediff-default-variant))
		  default-variant-alist)))
    (setq ediff-default-variant
	  (intern
	   (completing-read
	    (format "Current merge default is `%S'.  New default: "
		    ediff-default-variant)
	    actual-alist nil 'must-match)))
    (ediff-do-merge ediff-current-difference 'remerge)
    (ediff-recenter)
  ))

(defun ediff-shrink-window-C (arg)
  "Shrink window C to just one line.
With a prefix argument, returns window C to its normal size.
Used only for merging jobs."
  (interactive "P")
  (if (not ediff-merge-job)
      (error "ediff-shrink-window-C can be used only for merging jobs"))
  (cond ((eq arg '-) (setq arg -1))
	((not (numberp arg)) (setq arg nil)))
  (cond ((null arg)
	 (let ((ediff-merge-window-share
		(if (< (window-height ediff-window-C) 3)
		    ediff-merge-window-share 0)))
	   (setq ediff-window-config-saved "") ; force redisplay
	   (ediff-recenter 'no-rehighlight)))
	((and (< arg 0) (> (window-height ediff-window-C) 2))
	 (setq ediff-merge-window-share (* ediff-merge-window-share 0.9))
	 (setq ediff-window-config-saved "") ; force redisplay
	 (ediff-recenter 'no-rehighlight))
	((and (> arg 0) (> (window-height ediff-window-A) 2))
	 (setq ediff-merge-window-share (* ediff-merge-window-share 1.1))
	 (setq ediff-window-config-saved "") ; force redisplay
	 (ediff-recenter 'no-rehighlight))))


;; N here is the user's region number.  It is 1+ what Ediff uses internally.
(defun ediff-combine-diffs (n &optional batch-invocation)
  "Combine Nth diff regions of buffers A and B and place the combination in C.
N is a prefix argument.  If nil, combine the current difference regions.
Combining is done according to the specifications in variable
`ediff-combination-pattern'."
  (interactive "P")
  (setq n (if (numberp n) (1- n) ediff-current-difference))

  (let (reg-combined)
    ;;(setq regA (ediff-get-region-contents n 'A ediff-control-buffer)
    ;;	  regB (ediff-get-region-contents n 'B ediff-control-buffer))
    ;;(setq reg-combined (ediff-make-combined-diff regA regB))
    (setq reg-combined (ediff-get-combined-region n))

    (ediff-copy-diff n nil 'C batch-invocation reg-combined))
    (or batch-invocation (ediff-jump-to-difference (1+ n))))


;; Checks if the region in buff C looks like a combination of the regions
;; in buffers A and B.  Return a list (reg-a-beg reg-a-end reg-b-beg reg-b-end)
;; These refer to where the delimiters for region A, B, Ancestor start and end
;; in buffer C
(defun ediff-looks-like-combined-merge (region-num)
  (if ediff-merge-job
      (let ((combined (string-match (regexp-quote "(A+B)")
				    (or (ediff-get-state-of-diff region-num 'C)
					"")))
	    (mrgreg-beg (ediff-get-diff-posn 'C 'beg region-num))
	    (mrgreg-end (ediff-get-diff-posn 'C 'end region-num))
	    (pattern-list ediff-combination-pattern)
	    delim reg-beg reg-end delim-regs-list)

	(if combined
	    (ediff-with-current-buffer ediff-buffer-C
	      (while pattern-list
		(goto-char mrgreg-beg)
		(setq delim (nth 0 pattern-list))
		(search-forward delim mrgreg-end 'noerror)
		(setq reg-beg (match-beginning 0))
		(setq reg-end (match-end 0))
		(if (and reg-beg reg-end)
		    (setq delim-regs-list
			  ;; in reverse
			  (cons reg-end (cons reg-beg delim-regs-list))))
		(if (> (length pattern-list) 1)
		    (setq pattern-list (cdr (cdr pattern-list)))
		  (setq pattern-list nil))
		)))

	(reverse delim-regs-list)
	)))

(defvar state-of-merge)			; dynamic var

;; Check if the non-preferred merge has been modified since originally set.
;; This affects only the regions that are marked as default-A/B or combined.
;; If PREFERS-TOO is non-nil, then look at the regions marked as prefers-A/B as
;; well.
(defun ediff-merge-changed-from-default-p (diff-num &optional prefers-too)
  (let ((reg-A (ediff-get-region-contents diff-num 'A ediff-control-buffer))
	(reg-B (ediff-get-region-contents diff-num 'B ediff-control-buffer))
	(reg-C (ediff-get-region-contents diff-num 'C ediff-control-buffer)))

    (setq state-of-merge (ediff-get-state-of-merge diff-num))

    ;; if region was edited since it was first set by default
    (or (and (string= state-of-merge "default-A")
	     (not (string= reg-A reg-C)))
	(and (string= state-of-merge "default-B")
	     (not (string= reg-B reg-C)))
	(and (string= state-of-merge "combined")
	     ;;(not (string= (ediff-make-combined-diff reg-A reg-B) reg-C)))
	     (not (string= (ediff-get-combined-region diff-num) reg-C)))
	(and prefers-too
	     (string= state-of-merge "prefer-A")
	     (not (string= reg-A reg-C)))
	(and prefers-too
	     (string= state-of-merge "prefer-B")
	     (not (string= reg-B reg-C)))
	)))


(provide 'ediff-merg)


;; Local Variables:
;; eval: (put 'ediff-defvar-local 'lisp-indent-hook 'defun)
;; eval: (put 'ediff-with-current-buffer 'lisp-indent-hook 1)
;; eval: (put 'ediff-with-current-buffer 'edebug-form-spec '(form body))
;; End:

;; arch-tag: 9b798cf9-02ba-487f-a62e-b63aa823dbfb
;;; ediff-merg.el ends here
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.