-;;; ediff-init.el --- Macros, variables and defsubsts used by Ediff
-;;; Copyright (C) 1994, 1995 Free Software Foundation, Inc.
-
-;; Author: Michael Kifer <kifer@cs.sunysb.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 2, 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.
-
-
-(defconst ediff-xemacs-p (string-match "\\(Lucid\\|Xemacs\\)" emacs-version)
- "Whether it is XEmacs.")
-(defconst ediff-emacs-p (not ediff-xemacs-p)
- "Whether it is Emacs.")
-
-;;; Macros
-(defmacro ediff-odd-p (arg)
- (` (eq (logand (, arg) 1) 1)))
-
-(defmacro ediff-buffer-live-p (buf)
- (` (and (, buf) (get-buffer (, buf)) (buffer-name (get-buffer (, buf))))))
-
-(defmacro ediff-get-buffer (arg)
- (` (cond ((eq (, arg) 'A) ediff-buffer-A)
- ((eq (, arg) 'B) ediff-buffer-B)
- ((eq (, arg) 'C) ediff-buffer-C)
- )
- ))
-
-(defmacro ediff-get-value-according-to-buffer-type (buf-type list)
- (` (cond ((eq (, buf-type) 'A) (nth 0 (, list)))
- ((eq (, buf-type) 'B) (nth 1 (, list)))
- ((eq (, buf-type) 'C) (nth 2 (, list))))))
-
-(defmacro ediff-char-to-buftype (arg)
- (` (cond ((memq (, arg) '(?a ?A)) 'A)
- ((memq (, arg) '(?b ?B)) 'B)
- ((memq (, arg) '(?c ?C)) 'C)
- )
- ))
-
-(defmacro ediff-get-difference (n buf-type)
- (` (aref
- (symbol-value
- (intern (format "ediff-difference-vector-%S" (, buf-type)))) (, n))))
-
-;; tell if it has been previously determined that the region has
-;; no diffs other than the white space and newlines
-;; The argument, N, is the diff region number used by Ediff to index the
-;; diff vector. It is 1 less than the number seen by the user.
-;;
-;; A difference vector has the form:
-;; [diff diff diff ...]
-;; where each diff has the form:
-;; [overlay fine-diff-vector no-fine-diffs-flag]
-;; fine-diff-vector is a vector [fine-diff fine-diff fine-diff ...]
-(defmacro ediff-no-fine-diffs-p (n)
- (` (aref (ediff-get-difference (, n) 'A) 2)))
-
-(defmacro ediff-get-diff-overlay-from-diff-record (diff-rec)
- (` (aref (, diff-rec) 0)))
-
-(defmacro ediff-get-diff-overlay (n buf-type)
- (` (ediff-get-diff-overlay-from-diff-record
- (ediff-get-difference (, n) (, buf-type)))))
-
-(defmacro ediff-get-fine-diff-vector-from-diff-record (diff-rec)
- (` (aref (, diff-rec) 1)))
-
-(defmacro ediff-set-fine-diff-vector (n buf-type fine-vec)
- (` (aset (ediff-get-difference (, n) (, buf-type)) 1 (, fine-vec))))
-
-(defmacro ediff-get-state-of-diff (n buf-type)
- (` (if (ediff-buffer-live-p ediff-buffer-C)
- (aref (ediff-get-difference (, n) (, buf-type)) 3))))
-(defmacro ediff-set-state-of-diff (n buf-type val)
- (` (aset (ediff-get-difference (, n) (, buf-type)) 3 (, val))))
-(defmacro ediff-get-state-of-merge (n)
- (` (if (ediff-buffer-live-p ediff-buffer-C)
- (aref (ediff-get-difference (, n) 'C) 4))))
-(defmacro ediff-set-state-of-merge (n val)
- (` (aset (ediff-get-difference (, n) 'C) 4 (, val))))
-
-;; if flag is t, puts a mark on diff region saying that
-;; the differences are in white space only. If flag is nil,
-;; the region is marked as essential (i.e., differences are
-;; not just in the white space and newlines.)
-(defmacro ediff-mark-diff-as-space-only (n flag)
- (` (aset (ediff-get-difference (, n) 'A) 2 (, flag))))
-
-(defmacro ediff-get-fine-diff-vector (n buf-type)
- (` (ediff-get-fine-diff-vector-from-diff-record
- (ediff-get-difference (, n) (, buf-type)))))
-
-
-;; Defines SYMBOL as an advertised local variable.
-;; Performs a defvar, then executes `make-variable-buffer-local' on
-;; the variable. Also sets the `permanent-local' property,
-;; so that `kill-all-local-variables' (called by major-mode setting
-;; commands) won't destroy Ediff control variables.
-;;
-;; Plagiarised from `emerge-defvar-local' for XEmacs.
-(defmacro ediff-defvar-local (var value doc)
- (` (progn
- (defvar (, var) (, value) (, doc))
- (make-variable-buffer-local '(, var))
- (put '(, var) 'permanent-local t))))
-
-;; Macro to switch to BUFFER, evaluate FORMS, returns to original buffer.
-;; Differs from `save-excursion' in that it doesn't save the point and mark.
-;; This is essentially `emerge-eval-in-buffer' with the test for live buffers."
-(defmacro ediff-eval-in-buffer (buffer &rest forms)
- (` (let ((StartBuffer (current-buffer)))
- (if (ediff-buffer-live-p (, buffer))
- (unwind-protect
- (progn
- (set-buffer (, buffer))
- (,@ forms))
- (set-buffer StartBuffer))
- (or (eq this-command 'ediff-quit)
- (error
- "You've killed an essential Ediff buffer---Please quit Ediff"))
- ))))
-
-
-(defmacro ediff-multiframe-setup-p ()
- (` (and window-system ediff-multiframe)))
-
-(defmacro ediff-narrow-control-frame-p ()
- (` (and (ediff-multiframe-setup-p)
- (equal ediff-help-message ediff-brief-message-string))))
-
-(defmacro ediff-3way-comparison-job ()
- (` (memq
- ediff-job-name
- '(ediff-files3 ediff-buffers3))))
-(ediff-defvar-local ediff-3way-comparison-job nil "")
-
-(defmacro ediff-merge-job ()
- (` (memq
- ediff-job-name
- '(ediff-merge-files
- ediff-merge-buffers
- ediff-merge-files-with-ancestor
- ediff-merge-buffers-with-ancestor
- ediff-merge-revisions
- ediff-merge-revisions-with-ancestor))))
-(ediff-defvar-local ediff-merge-job nil "")
-
-(defmacro ediff-merge-with-ancestor-job ()
- (` (memq
- ediff-job-name
- '(ediff-merge-files-with-ancestor
- ediff-merge-buffers-with-ancestor
- ediff-merge-revisions-with-ancestor))))
-(ediff-defvar-local ediff-merge-with-ancestor-job nil "")
-
-(defmacro ediff-3way-job ()
- (` (or ediff-3way-comparison-job ediff-merge-job)))
-(ediff-defvar-local ediff-3way-job nil "")
-
-;; A diff3 job is like a 3way job, but ediff-merge doesn't require the use
-;; of diff3.
-(defmacro ediff-diff3-job ()
- (` (or ediff-3way-comparison-job
- ediff-merge-with-ancestor-job)))
-(ediff-defvar-local ediff-diff3-job nil "")
-
-(defmacro ediff-word-mode-job ()
- (` (memq
- ediff-job-name
- '(ediff-windows ediff-small-regions ediff-large-regions))))
-(ediff-defvar-local ediff-word-mode-job nil "")
-
-
-;; Hook variables
-
-(defvar ediff-before-setup-windows-hooks nil
- "*Hooks to run before Ediff sets its own window config.
-This can be used to save the previous window config, which can be restored
-on ediff-quit or ediff-suspend.")
-(defvar ediff-after-setup-windows-hooks nil
- "*Hooks to run after Ediff sets its own window config.
-This can be used to set up control window or icon in a desired place.")
-(defvar ediff-before-setup-control-frame-hooks nil
- "*Hooks run before setting up the frame to display Ediff Control Panel.
-Can be used to change control frame parameters to position it where it
-is desirable.")
-(defvar ediff-after-setup-control-frame-hooks nil
- "*Hooks run after setting up the frame to display Ediff Control Panel.
-Can be used to move the frame where it is desired.")
-(defvar ediff-startup-hooks nil
- "*Hooks to run in the control buffer after Ediff has been set up.")
-(defvar ediff-select-hooks nil
- "*Hooks to run after a difference has been selected.")
-(defvar ediff-unselect-hooks nil
- "*Hooks to run after a difference has been unselected.")
-(defvar ediff-prepare-buffer-hooks nil
- "*Hooks called after buffers A, B, and C are set up.")
-(defvar ediff-load-hooks nil
- "*Hook run after Ediff is loaded. Can be used to change defaults.")
-
-(defvar ediff-mode-hooks nil
- "*Hook run just after ediff-mode is set up in the control buffer.
-This is done before any windows or frames are created. One can use it to
-set local variables that determine how the display looks like.")
-(defvar ediff-keymap-setup-hooks nil
- "*Hook run just after the default bindings in Ediff keymap are set up.")
-
-(defvar ediff-display-help-hooks nil
- "*Hooks run after preparing the help message.")
-
-(defvar ediff-suspend-hooks (list 'ediff-default-suspend-hook)
- "*Hooks to run in the Ediff control buffer when Ediff is suspended.")
-(defvar ediff-quit-hooks (list 'ediff-cleanup-mess)
- "*Hooks to run in the Ediff control buffer after finishing Ediff.")
-
-;; There will be deleted in due time
-(make-variable-buffer-local 'local-write-file-hooks)
-(make-variable-buffer-local 'before-change-function)
-
-
-;; Help messages
-
-(defconst ediff-long-help-message-head
- " Moving around | Toggling features | Manipulations
-=====================|===========================|============================="
- "The head of the full help message.")
-(defconst ediff-long-help-message-tail
- "=====================|===========================|=============================
- i -status info | ? -help off | G -send bug report
--------------------------------------------------------------------------------
-X,Y (x,y) on the left are meta-symbols for the keys A,B,C (a,b,c).
-X,Y on the right are meta-symbols for buffers A,B,C.
-A,B,C on the right denote the working buffers A,B,C, respectively."
- "The tail of the full-help message.")
-
-(defconst ediff-long-help-message-compare3
- "
-p,DEL -previous diff | | -vert/horiz split | xy -copy buf X's region to Y
-n,SPC -next diff | h -hiliting | rx -restore buf X's old diff
- j -jump to diff | @ -auto-refinement | * -refine current region
- gx -goto X's point| | ! -update diff regions
- C-l -recenter | ## -ignore whitespace |
- v/V -scroll up/dn | #f/#h -focus/hide regions | wx -save buf X
- </> -scroll lt/rt | X -read-only in buf X | wd -save diff output
- z/q -suspend/quit | m -wide display | ~ -rotate buffers
-"
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-(defconst ediff-long-help-message-compare2
- "
-p,DEL -previous diff | | -vert/horiz split |a/b -copy A/B's region to B/A
-n,SPC -next diff | h -hiliting | rx -restore buf X's old diff
- j -jump to diff | @ -auto-refinement | * -refine current region
- gx -goto X's point| | ! -update diff regions
- C-l -recenter | ## -ignore whitespace |
- v/V -scroll up/dn | #f/#h -focus/hide regions | wx -save buf X
- </> -scroll lt/rt | X -read-only in buf X | wd -save diff output
- z/q -suspend/quit | m -wide display | ~ -swap buffers
-"
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-(defconst ediff-long-help-message-word-mode
- "
-p,DEL -previous diff | | -vert/horiz split | xy -copy buf X's region to Y
-n,SPC -next diff | h -hiliting | rx -restore buf X's old diff
- j -jump to diff | |
- gx -goto X's point| % -narrow/widen buffs | ! -recompute diffs
- C-l -recenter | |
- v/V -scroll up/dn | #f/#h -focus/hide regions | wx -save buf X
- </> -scroll lt/rt | X -read-only in buf X | wd -save diff output
- z/q -suspend/quit | m -wide display | ~ -swap buffers
-"
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-(defconst ediff-long-help-message-merge
- "
-p,DEL -previous diff | | -vert/horiz split | x -copy buf X's region to C
-n,SPC -next diff | h -hiliting | r -restore buf C's old diff
- j -jump to diff | @ -auto-refinement | * -refine current region
- gx -goto X's point| ## -ignore whitespace | ! -update diff regions
- C-l -recenter | #f/#h -focus/hide regions | + -combine diff regions
- v/V -scroll up/dn | X -read-only in buf X | wx -save buf X
- </> -scroll lt/rt | m -wide display | wd -save diff output
- z/q -suspend/quit | s -shrink window C | ~ -swap buffers
- | $ -show clashes only | & -merge w/new default
-"
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-;; The actual long help message.
-(ediff-defvar-local ediff-long-help-message ""
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-(defconst ediff-brief-message-string
- " ? - help "
- "Contents of the brief help message.")
-;; The actual brief help message
-(ediff-defvar-local ediff-brief-help-message ""
- "Normally, not a user option. See `ediff-help-message' for details.")
-
-(ediff-defvar-local ediff-brief-help-message-custom nil
- "The brief help message that the user can customize.
-If the user sets this to a parameter-less function, Ediff will use it to
-produce the brief help message. This function must return a string.")
-(ediff-defvar-local ediff-long-help-message-custom nil
- "The long help message that the user can customize.
-See `ediff-brief-help-message-custom' for more.")
-
-(defvar ediff-prefer-long-help-message nil
- "*If t, Ediff starts with a long help message. Short help msg otherwise.")
-
-;; The actual help message.
-(ediff-defvar-local ediff-help-message ""
- "The actual help message.
-Normally, the user shouldn't touch this. However, if you want Ediff to
-start up with different help messages for different jobs, you can change
-the value of this variable and the variables `ediff-help-message-*' in
-`ediff-startup-hooks'.")
-
-;; Selective browsing
-
-(ediff-defvar-local ediff-skip-diff-region-function 'ediff-show-all-diffs
- "Function that determines the next/previous diff region to show.
-Should return t for regions to be ignored and nil otherwise.
-This function gets a region number as an argument. The region number
-is the one used internally by Ediff. It is 1 less than the number seen
-by the user.")
-
-;; Regexp that determines buf A regions to focus on when skipping to diff
-(ediff-defvar-local ediff-regexp-focus-A "" "")
-;; Regexp that determines buf B regions to focus on when skipping to diff
-(ediff-defvar-local ediff-regexp-focus-B "" "")
-;; Regexp that determines buf C regions to focus on when skipping to diff
-(ediff-defvar-local ediff-regexp-focus-C "" "")
-;; connective that determines whether to focus regions that match both or
-;; one of the regexps
-(ediff-defvar-local ediff-focus-regexp-connective 'and "")
-
-;; Regexp that determines buf A regions to ignore when skipping to diff
-(ediff-defvar-local ediff-regexp-hide-A "" "")
-;; Regexp that determines buf B regions to ignore when skipping to diff
-(ediff-defvar-local ediff-regexp-hide-B "" "")
-;; Regexp that determines buf C regions to ignore when skipping to diff
-(ediff-defvar-local ediff-regexp-hide-C "" "")
-;; connective that determines whether to hide regions that match both or
-;; one of the regexps
-(ediff-defvar-local ediff-hide-regexp-connective 'and "")
-
-
-(defvar ediff-ange-ftp-ftp-name (if ediff-xemacs-p
- 'ange-ftp-ftp-path
- 'ange-ftp-ftp-name)
- "Function ange-ftp uses to find out if file is remote.")
-
-
-;; Copying difference regions between buffers.
-(ediff-defvar-local ediff-killed-diffs-alist nil
- "A list of killed diffs.
-A diff is saved here if it is replaced by a diff
-from another buffer. This alist has the form:
-\((num (buff-object . diff) (buff-object . diff) (buff-object . diff)) ...),
-where some buffer-objects may be missing.")
-
-
-;; Highlighting
-(defvar ediff-before-flag-bol "->>\n"
- "*Flag placed above the highlighted block of differences.
-Must end with newline.")
-(defvar ediff-after-flag-eol "<<-\n"
- "*Flag placed below the highlighted block of differences.
-Must end with newline.")
-
-(defvar ediff-before-flag-mol "->>"
- "*Like ediff-before-flag, used when a difference starts in mid-line.")
-(defvar ediff-after-flag-mol "<<-"
- "*Like ediff-after-flag, used when a difference starts in mid-line.")
-
-(ediff-defvar-local ediff-before-flag-A nil
- "This is the actual ASCII before-flag in effect in buffer A.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-(ediff-defvar-local ediff-after-flag-A nil
- "This is the actual ASCII after-flag in effect in buffer A.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-
-(ediff-defvar-local ediff-before-flag-B nil
- "This is the actual ASCII before-flag in effect in buffer B.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-(ediff-defvar-local ediff-after-flag-B nil
- "This is the actual ASCII after-flag in effect in buffer B.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-
-(ediff-defvar-local ediff-before-flag-C nil
- "This is the actual ASCII before-flag in effect in buffer C.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-(ediff-defvar-local ediff-after-flag-C nil
- "This is the actual ASCII after-flag in effect in buffer C.
-It is either `ediff-before-flag-mol' or `ediff-before-flag-bol' depending
-on whether the selected difference region starts in the middle of a line
-or at the beginning of a line.")
-
-
-(ediff-defvar-local ediff-use-faces t
- "If t, differences are highlighted using faces on a window system.
-If nil, they are highlighted using ASCII flags, ediff-before-flag
-and ediff-after-flag. On a non-window system, differences are always
-highlighted using ASCII flags.
-This variable can be set either in .emacs or toggled interactively.
-Use `setq-default' if setting it in .emacs")
-
-
-;; this indicates that diff regions are word-size, so fine diffs are
-;; permanently nixed; used in ediff-windows and ediff-small-regions
-(ediff-defvar-local ediff-word-mode nil "")
-;; Name of the job (ediff-files, ediff-windows, etc.
-(ediff-defvar-local ediff-job-name nil "")
-
-;; Narrowing and ediff-region/windows support
-;; This is a list (overlay-A overlay-B overlay-C)
-;; If set, Ediff compares only those parts of buffers A/B/C that lie within
-;; the bounds of these overlays.
-(ediff-defvar-local ediff-narrow-bounds nil "")
-
-;; List (overlay-A overlay-B overlay-C), where each overlay spans the
-;; entire corresponding buffer.
-(ediff-defvar-local ediff-wide-bounds nil "")
-
-;; Current visibility boundaries in buffers A, B, and C.
-;; This is also a list of overlays. When the user toggles narrow/widen,
-;; this list changes from ediff-wide-bounds to ediff-narrow-bounds.
-;; and back.
-(ediff-defvar-local ediff-visible-bounds nil "")
-
-(ediff-defvar-local ediff-start-narrowed t
- "Non-nil means start narrowed, if doing ediff-windows, ediff-small-regions,
-or ediff-large-regions.")
-(ediff-defvar-local ediff-quit-widened t
- "*Non-nil means: when finished, Ediff widens buffers A/B.
-Actually, Ediff restores the scope of visibility that existed at startup.")
-
-(ediff-defvar-local ediff-highlight-all-diffs t
- "If nil, only the selected differences are highlighted.
-This variable can be set either in .emacs or toggled interactively, using
-ediff-toggle-hilit. Use `setq-default' to set it.")
-
-;; A var local to each control panel buffer. Indicates highlighting style
-;; in effect for this buffer: `face', `ascii', nil -- temporarily
-;; unhighlighted, `off' -- turned off \(on a dumb terminal only\).
-(ediff-defvar-local ediff-highlighting-style nil "")
-
-
-;; Variables that control each Ediff session. They are local to the
-;; control buffer.
-
-;; Mode variables
-;; The buffer in which the A variant is stored.
-(ediff-defvar-local ediff-buffer-A nil "")
-;; The buffer in which the B variant is stored.
-(ediff-defvar-local ediff-buffer-B nil "")
-;; The buffer in which the C variant is stored.
-(ediff-defvar-local ediff-buffer-C nil "")
-;; Ancestor buffer
-(ediff-defvar-local ediff-ancestor-buffer nil "")
-;; The control buffer of ediff.
-(ediff-defvar-local ediff-control-buffer nil "")
-
-
-;; The suffix of the control buffer name.
-(ediff-defvar-local ediff-control-buffer-suffix nil "")
-;; Same as ediff-control-buffer-suffix, but without <,>.
-;; It's a number rather than string.
-(ediff-defvar-local ediff-control-buffer-number nil "")
-
-
-;; There three are to be deleted in due time
-;; Working values of ediff-saved-variables for buffer A.
-(ediff-defvar-local ediff-buffer-A-values nil "")
-;; working values of ediff-saved-variables for buffer B.
-(ediff-defvar-local ediff-buffer-B-values nil "")
-;; working values of ediff-saved-variables for buffer C.
-(ediff-defvar-local ediff-buffer-C-values nil "")
-
-;; The original values of ediff-protected-variables for buffer A
-(ediff-defvar-local ediff-buffer-A-values-orig nil "")
-;; The original values of ediff-protected-variables for buffer B
-(ediff-defvar-local ediff-buffer-B-values-orig nil "")
-;; The original values of ediff-protected-variables for buffer C
-(ediff-defvar-local ediff-buffer-C-values-orig nil "")
-;; Buffer-local variables to be saved then restored during Ediff sessions
-(defconst ediff-protected-variables '(buffer-read-only
- mode-line-format))
-
-;; These three vars are to be deleted when emacs gets before/after strings
-;; Remember ediff-saved-variables for ediff-buffer-A as they were at setup.
-(ediff-defvar-local ediff-buffer-A-values-setup nil "")
-;; Remembers ediff-saved-variables for ediff-buffer-B as they were at setup.
-(ediff-defvar-local ediff-buffer-B-values-setup nil "")
-;; Remembers ediff-saved-variables for ediff-buffer-C as they were at setup.
-(ediff-defvar-local ediff-buffer-C-values-setup nil "")
-
-;; Vector of differences between the variants. Each difference is
-;; represented by a vector of two overlays plus a vector of fine diffs,
-;; plus a no-fine-diffs flag. The first overlay spans the
-;; difference region in the A buffer and the second overlays the diff in
-;; the B buffer. If a difference section is empty, the corresponding
-;; overlay's endpoints coincide.
-;;
-;; The precise form of a difference vector for one buffer is:
-;; [diff diff diff ...]
-;; where each diff has the form:
-;; [diff-overlay fine-diff-vector no-fine-diffs-flag state-of-difference
-;; state-of-merge]
-;; fine-diff-vector is a vector [fine-diff-overlay fine-diff-overlay ...]
-;; no-fine-diffs-flag says if there are fine differences.
-;; state-of-difference is A, B, C, or nil, indicating which buffer is
-;; different from the other two (used only in 3-way jobs.
-;; state-of-merge is default-A, default-B, prefer-A, or prefer-B. It
-;; indicates the way a diff region was created in buffer C.
-(ediff-defvar-local ediff-difference-vector-A nil "")
-(ediff-defvar-local ediff-difference-vector-B nil "")
-(ediff-defvar-local ediff-difference-vector-C nil "")
-
-;; The difference that is currently selected.
-(ediff-defvar-local ediff-current-difference -1 "")
-;; Number of differences found.
-(ediff-defvar-local ediff-number-of-differences nil "")
-
-;; Buffer containing the output of diff, which is used by Ediff to step
-;; through files.
-(ediff-defvar-local ediff-diff-buffer nil "")
-;; Like ediff-diff-buffer, but contains context diff. It is not used by
-;; Ediff, but it is saved in a file, if user requests so.
-(ediff-defvar-local ediff-custom-diff-buffer nil "")
-;; Buffer used for diff-style fine differences between regions.
-(ediff-defvar-local ediff-fine-diff-buffer nil "")
-;; Temporary buffer used for computing fine differences.
-(defconst ediff-tmp-buffer " *ediff-tmp*" "")
-;; Buffer used for messages
-(defconst ediff-msg-buffer " *ediff-message*" "")
-;; Buffer containing the output of diff when diff returns errors.
-(ediff-defvar-local ediff-error-buffer nil "")
-;; Buffer to display debug info
-(ediff-defvar-local ediff-debug-buffer "*ediff-debug*" "")
-
-;; to be deleted in due time
-;; List of ediff control panels associated with each buffer A/B.
-(ediff-defvar-local ediff-this-buffer-control-sessions nil "")
-
-;; to be deleted in due time
-;; List of difference overlays disturbed by working with the current diff.
-(defvar ediff-disturbed-overlays nil "")
-
-;; Priority of non-selected overlays.
-(defvar ediff-shadow-overlay-priority 100 "")
-
-
-(if ediff-xemacs-p
- (progn
- (fset 'ediff-read-event (symbol-function 'next-command-event))
- (fset 'ediff-overlayp (symbol-function 'extentp))
- (fset 'ediff-make-overlay (symbol-function 'make-extent))
- (fset 'ediff-delete-overlay (symbol-function 'delete-extent))
- (fset 'ediff-overlay-buffer (symbol-function 'extent-buffer))
- (fset 'ediff-overlay-p (symbol-function 'extentp))
- (fset 'ediff-overlay-get (symbol-function 'extent-property)))
- (fset 'ediff-read-event (symbol-function 'read-event))
- (fset 'ediff-overlayp (symbol-function 'overlayp))
- (fset 'ediff-make-overlay (symbol-function 'make-overlay))
- (fset 'ediff-delete-overlay (symbol-function 'delete-overlay))
- (fset 'ediff-overlay-buffer (symbol-function 'overlay-buffer))
- (fset 'ediff-overlay-p (symbol-function 'overlayp))
- (fset 'ediff-overlay-get (symbol-function 'overlay-get)))
-
-;; A fix for NeXT Step
-;; Should probably be eliminated in later versions.
-(if (and window-system (eq window-system 'ns))
- (progn
- (fset 'x-display-color-p (symbol-function 'ns-display-color-p))
- (fset 'x-color-defined-p (symbol-function 'ns-color-defined-p))
- (fset 'x-display-pixel-height (symbol-function 'ns-display-pixel-height))
- (fset 'x-display-pixel-width (symbol-function 'ns-display-pixel-width))
- ))
-
-(if ediff-xemacs-p
- (progn
- (fset 'ediff-make-frame (symbol-function 'make-screen))
- ;;(fset 'ediff-make-frame-invisible
- ;; (symbol-function 'make-screen-invisible))
- (fset 'ediff-raise-frame (symbol-function 'raise-screen))
- (fset 'ediff-iconify-frame (symbol-function 'iconify-screen))
- (fset 'ediff-delete-frame (symbol-function 'delete-screen))
- (fset 'ediff-frame-visible-p (symbol-function 'screen-visible-p))
- (fset 'ediff-select-frame (symbol-function 'select-screen))
- (fset 'ediff-selected-frame (symbol-function 'selected-screen))
- ;;(fset 'ediff-frame-selected-window
- ;; (symbol-function 'screen-selected-window))
- (fset 'ediff-frame-parameters (symbol-function 'screen-parameters))
- ;;(fset 'ediff-frame-pixel-width (symbol-function 'screen-pixel-width))
- (fset 'ediff-frame-width (symbol-function 'screen-width))
- (fset 'ediff-modify-frame-parameters
- (symbol-function 'modify-screen-parameters))
- (fset 'ediff-frame-live-p (symbol-function 'screen-live-p))
- (fset 'ediff-window-frame (symbol-function 'window-screen))
- (if window-system
- (progn
- (fset 'ediff-display-color-p (symbol-function 'x-color-display-p))
- (fset 'ediff-valid-color-p (symbol-function 'x-valid-color-name-p))
- (fset 'ediff-get-face (symbol-function 'get-face)))))
- (if window-system
- (progn
- (fset 'ediff-make-frame (symbol-function 'make-frame))
- ;;(fset 'ediff-make-frame-invisible
- ;; (symbol-function 'make-frame-invisible))
- (fset 'ediff-raise-frame (symbol-function 'raise-frame))
- (fset 'ediff-iconify-frame (symbol-function 'iconify-frame))
- (fset 'ediff-delete-frame (symbol-function 'delete-frame))
- (fset 'ediff-frame-visible-p (symbol-function 'frame-visible-p))
- (fset 'ediff-window-frame (symbol-function 'window-frame))
- (fset 'ediff-select-frame (symbol-function 'select-frame))
- (fset 'ediff-selected-frame (symbol-function 'selected-frame))
- ;;(fset 'ediff-frame-selected-window
- ;; (symbol-function 'frame-selected-window))
- (fset 'ediff-frame-parameters (symbol-function 'frame-parameters))
- ;;(fset 'ediff-frame-pixel-width (symbol-function 'frame-pixel-width))
- (fset 'ediff-frame-width (symbol-function 'frame-width))
- (fset 'ediff-modify-frame-parameters
- (symbol-function 'modify-frame-parameters))
- (fset 'ediff-frame-live-p (symbol-function 'frame-live-p))
- ))
-
- (if window-system
- (progn
- (fset 'ediff-display-color-p (symbol-function 'x-display-color-p))
- ;; Temporary fix for OS/2 users
- ;; pm-win.el in PM-Emacs should be fixed.
- (if (eq window-system 'pm)
- (fset 'ediff-valid-color-p
- (function (lambda (color) (assoc color pm-color-alist))))
- (fset 'ediff-valid-color-p (symbol-function 'x-color-defined-p)))
-
- (fset 'ediff-get-face (symbol-function 'internal-get-face))))
- )
-
-;; not a window system
-(if (not window-system)
- (progn
- (fset 'ediff-window-frame (function (lambda (wind) (if wind 1 nil)) ))
- (fset 'ediff-selected-frame 'selected-window)
- (fset 'ediff-frame-width 'window-width)
- (fset 'ediff-make-current-diff-overlay (function (lambda (type) nil)))))
-
-(if (not window-system)
- ()
- (defun ediff-set-face (ground face color)
- "Sets face foreground/background."
- (if (ediff-valid-color-p color)
- (if (eq ground 'foreground)
- (set-face-foreground face color)
- (set-face-background face color))
- (cond ((memq face
- '(ediff-current-diff-face-A
- ediff-current-diff-face-B
- ediff-current-diff-face-C))
- (copy-face 'highlight face))
- ((memq face
- '(ediff-fine-diff-face-A
- ediff-fine-diff-face-B
- ediff-fine-diff-face-C
-;; ediff-combined-diff-face
- ))
- (copy-face 'secondary-selection face)
- (set-face-underline-p face t))
- ((memq face
- '(ediff-even-diff-face-A ediff-odd-diff-face-A
- ediff-even-diff-face-B ediff-odd-diff-face-B
- ediff-even-diff-face-C ediff-odd-diff-face-C))
- (copy-face 'secondary-selection face)))))
-
- (defvar ediff-current-diff-face-A
- (progn
- (make-face 'ediff-current-diff-face-A)
- (or (face-differs-from-default-p 'ediff-current-diff-face-A)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-current-diff-face-A "firebrick")
- (ediff-set-face
- 'background 'ediff-current-diff-face-A "pale green"))
- (t
- (if ediff-xemacs-p
- (copy-face 'modeline 'ediff-current-diff-face-A)
- (copy-face 'highlight 'ediff-current-diff-face-A))
- )))
- 'ediff-current-diff-face-A)
- "Face for highlighting the selected difference in buffer A.")
-
- (defvar ediff-current-diff-face-B
- (progn
- (make-face 'ediff-current-diff-face-B)
- (or (face-differs-from-default-p 'ediff-current-diff-face-B)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-current-diff-face-B "DarkOrchid")
- (ediff-set-face
- 'background 'ediff-current-diff-face-B "Yellow"))
- (t
- (if ediff-xemacs-p
- (copy-face 'modeline 'ediff-current-diff-face-B)
- (copy-face 'highlight 'ediff-current-diff-face-B))
- )))
- 'ediff-current-diff-face-B)
- "Face for highlighting the selected difference in buffer B.")
-
-
- (defvar ediff-current-diff-face-C
- (progn
- (make-face 'ediff-current-diff-face-C)
- (or (face-differs-from-default-p 'ediff-current-diff-face-C)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-current-diff-face-C "Navy")
- (ediff-set-face
- 'background 'ediff-current-diff-face-C "Pink"))
- (t
- (if ediff-xemacs-p
- (copy-face 'modeline 'ediff-current-diff-face-C)
- (copy-face 'highlight 'ediff-current-diff-face-C))
- )))
- 'ediff-current-diff-face-C)
- "Face for highlighting the selected difference in buffer C.")
-
- (defvar ediff-fine-diff-face-A
- (progn
- (make-face 'ediff-fine-diff-face-A)
- (or (face-differs-from-default-p 'ediff-fine-diff-face-A)
- (cond ((ediff-display-color-p)
- (ediff-set-face 'foreground 'ediff-fine-diff-face-A
- "Navy")
- (ediff-set-face 'background 'ediff-fine-diff-face-A
- "sky blue"))
- (t (set-face-underline-p 'ediff-fine-diff-face-A t))))
- 'ediff-fine-diff-face-A)
- "Face for highlighting the refinement of the selected diff in buffer A.")
-
- (defvar ediff-fine-diff-face-B
- (progn
- (make-face 'ediff-fine-diff-face-B)
- (or (face-differs-from-default-p 'ediff-fine-diff-face-B)
- (cond ((ediff-display-color-p)
- (ediff-set-face 'foreground 'ediff-fine-diff-face-B "Black")
- (ediff-set-face 'background 'ediff-fine-diff-face-B "cyan"))
- (t (set-face-underline-p 'ediff-fine-diff-face-B t))))
- 'ediff-fine-diff-face-B)
- "Face for highlighting the refinement of the selected diff in buffer B.")
-
- (defvar ediff-fine-diff-face-C
- (progn
- (make-face 'ediff-fine-diff-face-C)
- (or (face-differs-from-default-p 'ediff-fine-diff-face-C)
- (cond ((ediff-display-color-p)
- (ediff-set-face 'foreground 'ediff-fine-diff-face-C "black")
- (ediff-set-face
- 'background 'ediff-fine-diff-face-C "Turquoise"))
- (t (set-face-underline-p 'ediff-fine-diff-face-C t))))
- 'ediff-fine-diff-face-C)
- "Face for highlighting the refinement of the selected diff in buffer C.")
-
-;; (defvar ediff-combined-diff-face
-;; (progn
-;; (make-face 'ediff-combined-diff-face)
-;; (or (face-differs-from-default-p 'ediff-combined-diff-face)
-;; (cond ((ediff-display-color-p)
-;; (ediff-set-face 'foreground 'ediff-combined-diff-face "black")
-;; (ediff-set-face
-;; 'background 'ediff-combined-diff-face "Plum"))
-;; (t (set-face-underline-p 'ediff-combined-diff-face t))))
-;; 'ediff-combined-diff-face)
-;; "Face for highlighting combined selected diff regions in buffer C.")
-
- (defvar ediff-even-diff-face-A
- (progn
- (make-face 'ediff-even-diff-face-A)
- (or (face-differs-from-default-p 'ediff-even-diff-face-A)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-even-diff-face-A "black")
- (ediff-set-face
- 'background 'ediff-even-diff-face-A "light grey"))
- (t
- (copy-face 'italic 'ediff-even-diff-face-A))))
- 'ediff-even-diff-face-A)
- "Face used to highlight even-numbered differences in buffer A.")
-
- (defvar ediff-even-diff-face-B
- (progn
- (make-face 'ediff-even-diff-face-B)
- (or (face-differs-from-default-p 'ediff-even-diff-face-B)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-even-diff-face-B "White")
- (ediff-set-face
- 'background 'ediff-even-diff-face-B "Gray"))
- (t
- (copy-face 'italic 'ediff-even-diff-face-B))))
- 'ediff-even-diff-face-B)
- "Face used to highlight even-numbered differences in buffer B.")
-
- (defvar ediff-even-diff-face-C
- (progn
- (make-face 'ediff-even-diff-face-C)
- (copy-face 'ediff-even-diff-face-A 'ediff-even-diff-face-C)
- 'ediff-even-diff-face-C)
- "Face used to highlight even-numbered differences in buffer C.")
-
- (defvar ediff-odd-diff-face-A
- (progn
- (make-face 'ediff-odd-diff-face-A)
- (or (face-differs-from-default-p 'ediff-odd-diff-face-A)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-odd-diff-face-A "White")
- (ediff-set-face
- 'background 'ediff-odd-diff-face-A "Gray"))
- (t
- (copy-face 'italic 'ediff-odd-diff-face-A))))
- 'ediff-odd-diff-face-A)
- "Face used to highlight odd-numbered differences in buffer A.")
-
- (defvar ediff-odd-diff-face-B
- (progn
- (make-face 'ediff-odd-diff-face-B)
- (or (face-differs-from-default-p 'ediff-odd-diff-face-B)
- (cond ((ediff-display-color-p)
- (ediff-set-face
- 'foreground 'ediff-odd-diff-face-B "Black")
- (ediff-set-face
- 'background 'ediff-odd-diff-face-B "light grey"))
- (t
- (copy-face 'italic 'ediff-odd-diff-face-B))))
- 'ediff-odd-diff-face-B)
- "Face used to highlight odd-numbered differences in buffer B.")
-
- (defvar ediff-odd-diff-face-C
- (progn
- (make-face 'ediff-odd-diff-face-C)
- (copy-face 'ediff-odd-diff-face-A 'ediff-odd-diff-face-C)
- 'ediff-odd-diff-face-C)
- "Face used to highlight odd-numbered differences in buffer C.")
-
- ;; Create *-var faces. These are the actual faces used to highlight
- ;; odd-numbered difference regions.
- ;; They are used as follows: when highlighting is turned on,
- ;; ediff-odd/even-diff-face-A/B/C are copied
- ;; into ediff-odd/even-diff-face-A/B/C-var, and all odd/even overlays become
- ;; highlighted. When highlighting is turned off, then the face 'default is
- ;; copied into ediff-odd/even-diff-face-A/B/C-var, thereby unhighlighting all
- ;; difference regions.
- (make-face 'ediff-even-diff-face-A-var)
- (make-face 'ediff-even-diff-face-B-var)
- (make-face 'ediff-even-diff-face-C-var)
- (make-face 'ediff-odd-diff-face-A-var)
- (make-face 'ediff-odd-diff-face-B-var)
- (make-face 'ediff-odd-diff-face-C-var)
-
- ;; initialize *-var faces
- (defun ediff-init-var-faces ()
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-even-diff-face-A 'default)
- 'ediff-even-diff-face-A-var)
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-even-diff-face-B 'default)
- 'ediff-even-diff-face-B-var)
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-even-diff-face-C 'default)
- 'ediff-even-diff-face-C-var)
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-odd-diff-face-A 'default)
- 'ediff-odd-diff-face-A-var)
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-odd-diff-face-B 'default)
- 'ediff-odd-diff-face-B-var)
- (copy-face (if (and ediff-use-faces ediff-highlight-all-diffs)
- ediff-odd-diff-face-C 'default)
- 'ediff-odd-diff-face-C-var)
- )
-
-
-;;; Overlays
-
- (ediff-defvar-local ediff-current-diff-overlay-A nil
- "Overlay for the current difference region in buffer A.")
- (ediff-defvar-local ediff-current-diff-overlay-B nil
- "Overlay for the current difference region in buffer B.")
- (ediff-defvar-local ediff-current-diff-overlay-C nil
- "Overlay for the current difference region in buffer C.")
-
- (defun ediff-make-current-diff-overlay (type)
- (let ((overlay (intern (format "ediff-current-diff-overlay-%S" type)))
- (buffer (ediff-get-buffer type))
- (face (face-name
- (symbol-value
- (intern (format "ediff-current-diff-face-%S" type))))))
- (set overlay
- (ediff-make-bullet-proof-overlay (point-max) (point-max) buffer))
- (ediff-overlay-put (symbol-value overlay) 'face face)
- (ediff-overlay-put (symbol-value overlay) 'ediff ediff-control-buffer)
- ))
-
- ;; Compute priority of ediff overlay.
- (defun ediff-highest-priority (start end buffer)
- (let ((pos (max 1 (1- start)))
- ovr-list)
- (if ediff-xemacs-p
- (1+ ediff-shadow-overlay-priority)
- (ediff-eval-in-buffer buffer
- (while (< pos (min (point-max) (1+ end)))
- (setq ovr-list (append (overlays-at pos) ovr-list))
- (setq pos (next-overlay-change pos)))
- (1+ (apply '+
- (mapcar (function
- (lambda (ovr)
- (if ovr
- (or (ediff-overlay-get ovr 'priority) 0)
- 0)))
- ovr-list)
- ))
- ))))
-
-) ; end of window-system-only code.
-
-
-(defvar ediff-toggle-read-only-function nil
- "*Specifies the function to be used to toggle read-only.
-If nil, Ediff tries to deduce the function from the binding of C-x C-q.
-Normally, this is the `toggle-read-only' function, but, if version
-control is used, it could be `vc-toggle-read-only' or `rcs-toggle-read-only'.")
-
-(ediff-defvar-local ediff-file-checked-out-flag nil
- "If t, indicates that buffer has been already checked out.")
-
-
-
-;;; Misc
-
-;; when emacs will have before/after-string in overlays, this variable will
-;; be deleted
-(defconst ediff-saved-variables
- '(;;buffer-read-only
- buffer-auto-save-file-name)
- "Buffer-local variables saved and restored during an Ediff session.")
-
-;; to be deleted in due time
-(defconst ediff-working-values '(nil)
- "Values to be assigned to `ediff-saved-variables' during diff.")
-
-;; if nil, this silences some messages
-(defconst ediff-verbose-p t)
-
-(defvar ediff-no-emacs-help-in-control-buffer nil
- "*Non-nil means C-h should not invoke Emacs help in control buffer.
-Instead, C-h jumps to previous difference.")
-
-(defvar ediff-temp-file-prefix
- (let ((env (or (getenv "TMPDIR")
- (getenv "TMP")
- (getenv "TEMP")))
- d)
- (setq d (if (and env (> (length env) 0))
- env
- (if (memq system-type '(vax-vms axp-vms))
- "SYS$SCRATCH:"
- "/tmp")))
- ;; The following is to make sure we get something to which we can
- ;; add directory levels on VMS.
- (setq d (file-name-as-directory (directory-file-name d)))
- ;;(concat d "ediff")
- )
- "*Prefix to put on Ediff temporary file names.
-Do not start with `~/' or `~user-name/'.")
-
-(defvar ediff-temp-file-mode 384 ; u=rw only
- "*Mode for Ediff temporary files.")
-
-;; Metacharacters that have to be protected from the shell when executing
-;; a diff/diff3 command.
-(defvar ediff-metachars "[ \t\n!\"#$&'()*;<=>?[\\^`{|~]"
- "Characters that must be quoted with \\ when used in a shell command line.
-More precisely, a regexp to match any one such character.")
-
-
-(ediff-defvar-local ediff-temp-file-A nil
- "Temporary file used for refining difference regions in buffer A.")
-(ediff-defvar-local ediff-temp-file-B nil
- "Temporary file used for refining difference regions in buffer B.")
-(ediff-defvar-local ediff-temp-file-C nil
- "Temporary file used for refining difference regions in buffer C.")
-
-;;; In-line functions
-
-(defsubst ediff-file-remote-p (file-name)
- (if (fboundp ediff-ange-ftp-ftp-name)
- (funcall ediff-ange-ftp-ftp-name file-name)))
-
-(defsubst ediff-frame-has-menubar ()
- (and window-system
- (if ediff-xemacs-p
- current-menubar
- (let ((lines (cdr (assq 'menu-bar-lines
- (frame-parameters (ediff-selected-frame))))))
- (or (eq lines t) (and (numberp lines) (< 0 lines))))
- )))
-
-(defsubst ediff-frame-unsplittable-p (frame)
- (cdr (assq 'unsplittable (ediff-frame-parameters frame))))
-
-(defsubst ediff-get-next-window (wind prev-wind)
- (or (window-live-p wind)
- (setq wind (if prev-wind
- (next-window wind)
- (selected-window)))))
-
-(defsubst ediff-convert-diffs-to-overlays (diff-list)
- (ediff-set-diff-overlays-in-one-buffer 'A diff-list)
- (ediff-set-diff-overlays-in-one-buffer 'B diff-list)
- (if ediff-3way-job
- (ediff-set-diff-overlays-in-one-buffer 'C diff-list))
- (message "Processing difference regions ... done"))
-
-
-(defsubst ediff-kill-buffer-carefully (buf)
- "Kill buffer BUF if it exists."
- (if (ediff-buffer-live-p buf)
- (kill-buffer (get-buffer buf))))
-
-
-(defsubst ediff-highlight-diff (n)
- "Put face on diff N. Invoked for X displays only."
- (ediff-highlight-diff-in-one-buffer n 'A)
- (ediff-highlight-diff-in-one-buffer n 'B)
- (ediff-highlight-diff-in-one-buffer n 'C))
-
-
-(defsubst ediff-unhighlight-diff ()
- "Remove overlays from buffers A, B, and C."
- (ediff-unhighlight-diff-in-one-buffer 'A)
- (ediff-unhighlight-diff-in-one-buffer 'B)
- (ediff-unhighlight-diff-in-one-buffer 'C))
-
-;; delete highlighting overlays, restore faces to their original form
-(defsubst ediff-unhighlight-diffs-totally ()
- (ediff-unhighlight-diffs-totally-in-one-buffer 'A)
- (ediff-unhighlight-diffs-totally-in-one-buffer 'B)
- (ediff-unhighlight-diffs-totally-in-one-buffer 'C))
-
-
-;; arg is a record for a given diff in a difference vector
-;; this record is itself a vector
-(defsubst ediff-clear-fine-diff-vector (diff-record)
- (if diff-record
- (mapcar 'ediff-delete-overlay
- (ediff-get-fine-diff-vector-from-diff-record diff-record))))
-
-(defsubst ediff-clear-fine-differences-in-one-buffer (n buf-type)
- (ediff-clear-fine-diff-vector (ediff-get-difference n buf-type))
- (ediff-set-fine-diff-vector n buf-type nil))
-
-(defsubst ediff-clear-fine-differences (n)
- (ediff-clear-fine-differences-in-one-buffer n 'A)
- (ediff-clear-fine-differences-in-one-buffer n 'B)
- (if ediff-3way-job
- (ediff-clear-fine-differences-in-one-buffer n 'C)))
-
-
-(defsubst ediff-convert-fine-diffs-to-overlays (diff-list region-num)
- (ediff-set-fine-overlays-in-one-buffer 'A diff-list region-num)
- (ediff-set-fine-overlays-in-one-buffer 'B diff-list region-num)
- (if ediff-3way-job
- (ediff-set-fine-overlays-in-one-buffer 'C diff-list region-num)
- ))
-
-(defsubst ediff-mouse-event-p (event)
- (if ediff-xemacs-p
- (button-event-p event)
- (string-match "mouse" (format "%S" (event-basic-type event)))
- ))
-
-(defsubst ediff-frame-iconified-p (frame)
- (if (and window-system (ediff-frame-live-p frame))
- (if ediff-xemacs-p
- (screen-iconified-p frame)
- (eq (frame-visible-p frame) 'icon))))
-
-(defsubst ediff-window-visible-p (wind)
- (and (window-live-p wind)
- ;; under non-wondow system, window-live-p also means window is visible
- (or (not window-system)
- (ediff-frame-visible-p (ediff-window-frame wind)))))
-
-
-(defsubst ediff-frame-char-width (frame)
- (if ediff-xemacs-p
- (/ (screen-pixel-width frame) (screen-width frame))
- (frame-char-width frame)))
-
-(defsubst ediff-frame-char-height (frame)
- (if ediff-xemacs-p
- (/ (screen-pixel-height frame) (screen-height frame))
- (frame-char-height frame)))
-
-
-(defsubst ediff-empty-overlay-p (overl)
- (= (ediff-overlay-start overl) (ediff-overlay-end overl)))
-
-;; t if diff region is empty.
-;; In case of buffer C, t also if it is not a 3way
-;; comparison job (merging jobs return t as well).
-(defun ediff-empty-diff-region-p (n buf-type)
- (if (eq buf-type 'C)
- (or (not ediff-3way-comparison-job)
- (= (ediff-get-diff-posn 'C 'beg n)
- (ediff-get-diff-posn 'C 'end n)))
- (= (ediff-get-diff-posn buf-type 'beg n)
- (ediff-get-diff-posn buf-type 'end n))))
-
-;; Test if diff region is white space only.
-;; If 2-way job and buf-type = C, then returns t.
-(defun ediff-whitespace-diff-region-p (n buf-type)
- (or (and (eq buf-type 'C) (not ediff-3way-job))
- (let ((beg (ediff-get-diff-posn buf-type 'beg n))
- (end (ediff-get-diff-posn buf-type 'end n)))
- (ediff-eval-in-buffer (ediff-get-buffer buf-type)
- (save-excursion
- (goto-char beg)
- (skip-chars-forward ediff-whitespace)
- (>= (point) end))))))
-
-;; temporarily uses DIR to abbreviate file name
-;; if DIR is nil, use default-directory
-(defsubst ediff-abbreviate-filename (file dir)
- (let* ((dir (or dir default-directory))
- (directory-abbrev-alist (list (cons dir ""))))
- (abbreviate-file-name file)))
-
-(defsubst ediff-get-region-contents (n buf-type ctrl-buf &optional start end)
- (ediff-eval-in-buffer
- (ediff-eval-in-buffer ctrl-buf (ediff-get-buffer buf-type))
- (buffer-substring
- (or start (ediff-get-diff-posn buf-type 'beg n ctrl-buf))
- (or end (ediff-get-diff-posn buf-type 'end n ctrl-buf)))))
-
-;; If ediff modified mode line, strip the modification
-(defsubst ediff-strip-mode-line-format ()
- (if (member (car mode-line-format) '(" A: " " B: " " C: "))
- (setq mode-line-format (nth 2 mode-line-format))))
-
-;; Verify that we have a difference selected.
-(defsubst ediff-valid-difference-p (&optional n)
- (or n (setq n ediff-current-difference))
- (and (>= n 0) (< n ediff-number-of-differences)))
-
-(defsubst ediff-show-all-diffs (n)
- "Don't skip difference regions."
- nil)
-
-(provide 'ediff-init)
-
-
-;;; ediff-init.el ends here
+;;; ediff-init.el --- Macros, variables, and defsubsts used by Ediff
+
+;; Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 04 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 2, 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, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
+
+;;; Commentary:
+
+;;; Code:
+
+;; Start compiler pacifier
+(defvar ediff-metajob-name)
+(defvar ediff-meta-buffer)
+(defvar pm-color-alist)
+(defvar ediff-grab-mouse)
+(defvar ediff-mouse-pixel-position)
+(defvar ediff-mouse-pixel-threshold)
+(defvar ediff-whitespace)
+(defvar ediff-multiframe)
+(defvar ediff-use-toolbar-p)
+(defvar mswindowsx-bitmap-file-path)
+
+(and noninteractive
+ (eval-when-compile
+ (load "ange-ftp" 'noerror)))
+;; end pacifier
+
+;; Is it XEmacs?
+(defconst ediff-xemacs-p (string-match "XEmacs" emacs-version))
+;; Is it Emacs?
+(defconst ediff-emacs-p (not ediff-xemacs-p))
+
+;; This is used to avoid compilation warnings. When emacs/xemacs forms can
+;; generate compile time warnings, we use this macro.
+;; In this case, the macro will expand into the form that is appropriate to the
+;; compiler at hand.
+;; Suggested by rms.
+(defmacro ediff-cond-compile-for-xemacs-or-emacs (xemacs-form emacs-form)
+ (if (string-match "XEmacs" emacs-version)
+ xemacs-form emacs-form))
+
+(defvar ediff-force-faces nil
+ "If t, Ediff will think that it is running on a display that supports faces.
+This is provided as a temporary relief for users of face-capable displays
+that Ediff doesn't know about.")
+
+;; Are we running as a window application or on a TTY?
+(defsubst ediff-device-type ()
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (device-type (selected-device)) ; xemacs form
+ window-system ; emacs form
+ ))
+
+;; in XEmacs: device-type is tty on tty and stream in batch.
+(defun ediff-window-display-p ()
+ (and (ediff-device-type) (not (memq (ediff-device-type) '(tty pc stream)))))
+
+;; test if supports faces
+(defun ediff-has-face-support-p ()
+ (cond ((ediff-window-display-p))
+ (ediff-force-faces)
+ ((ediff-color-display-p))
+ (ediff-emacs-p (memq (ediff-device-type) '(pc)))
+ (ediff-xemacs-p (memq (ediff-device-type) '(tty pc)))
+ ))
+
+;; toolbar support for emacs hasn't been implemented in ediff
+(defun ediff-has-toolbar-support-p ()
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (and (featurep 'toolbar) (console-on-window-system-p)) ; xemacs form
+ nil ; emacs form
+ ))
+
+
+(defun ediff-has-gutter-support-p ()
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (and (featurep 'gutter) (console-on-window-system-p)) ; xemacs form
+ nil ; emacs form
+ ))
+
+
+(defun ediff-use-toolbar-p ()
+ (and (ediff-has-toolbar-support-p) ;Can it do it ?
+ (boundp 'ediff-use-toolbar-p)
+ ediff-use-toolbar-p)) ;Does the user want it ?
+
+;; Defines SYMBOL as an advertised local variable.
+;; Performs a defvar, then executes `make-variable-buffer-local' on
+;; the variable. Also sets the `permanent-local' property,
+;; so that `kill-all-local-variables' (called by major-mode setting
+;; commands) won't destroy Ediff control variables.
+;;
+;; Plagiarised from `emerge-defvar-local' for XEmacs.
+(defmacro ediff-defvar-local (var value doc)
+ `(progn
+ (defvar ,var ,value ,doc)
+ (make-variable-buffer-local ',var)
+ (put ',var 'permanent-local t)))
+
+
+
+;; Variables that control each Ediff session---local to the control buffer.
+
+;; Mode variables
+;; The buffer in which the A variant is stored.
+(ediff-defvar-local ediff-buffer-A nil "")
+;; The buffer in which the B variant is stored.
+(ediff-defvar-local ediff-buffer-B nil "")
+;; The buffer in which the C variant is stored or where the merge buffer lives.
+(ediff-defvar-local ediff-buffer-C nil "")
+;; Ancestor buffer
+(ediff-defvar-local ediff-ancestor-buffer nil "")
+;; The Ediff control buffer
+(ediff-defvar-local ediff-control-buffer nil "")
+
+(ediff-defvar-local ediff-temp-indirect-buffer nil
+ "If t, the buffer is a temporary indirect buffer.
+It needs to be killed when we quit the session.")
+
+
+;; Association between buff-type and ediff-buffer-*
+(defconst ediff-buffer-alist
+ '((?A . ediff-buffer-A)
+ (?B . ediff-buffer-B)
+ (?C . ediff-buffer-C)))
+
+;;; Macros
+(defmacro ediff-odd-p (arg)
+ `(eq (logand ,arg 1) 1))
+
+(defmacro ediff-buffer-live-p (buf)
+ `(and ,buf (get-buffer ,buf) (buffer-name (get-buffer ,buf))))
+
+(defmacro ediff-get-buffer (arg)
+ `(cond ((eq ,arg 'A) ediff-buffer-A)
+ ((eq ,arg 'B) ediff-buffer-B)
+ ((eq ,arg 'C) ediff-buffer-C)
+ ((eq ,arg 'Ancestor) ediff-ancestor-buffer)
+ ))
+
+(defmacro ediff-get-value-according-to-buffer-type (buf-type list)
+ `(cond ((eq ,buf-type 'A) (nth 0 ,list))
+ ((eq ,buf-type 'B) (nth 1 ,list))
+ ((eq ,buf-type 'C) (nth 2 ,list))
+ ))
+
+(defmacro ediff-char-to-buftype (arg)
+ `(cond ((memq ,arg '(?a ?A)) 'A)
+ ((memq ,arg '(?b ?B)) 'B)
+ ((memq ,arg '(?c ?C)) 'C)
+ ))
+
+
+;; A-list is supposed to be of the form (A . symb) (B . symb)...)
+;; where the first part of any association is a buffer type and the second is
+;; an appropriate symbol. Given buffer-type, this function returns the
+;; symbol. This is used to avoid using `intern'
+(defsubst ediff-get-symbol-from-alist (buf-type alist)
+ (cdr (assoc buf-type alist)))
+
+(defconst ediff-difference-vector-alist
+ '((A . ediff-difference-vector-A)
+ (B . ediff-difference-vector-B)
+ (C . ediff-difference-vector-C)
+ (Ancestor . ediff-difference-vector-Ancestor)))
+
+(defmacro ediff-get-difference (n buf-type)
+ `(aref
+ (symbol-value
+ (ediff-get-symbol-from-alist
+ ,buf-type ediff-difference-vector-alist))
+ ,n))
+
+;; Tell if it has been previously determined that the region has
+;; no diffs other than the white space and newlines
+;; The argument, N, is the diff region number used by Ediff to index the
+;; diff vector. It is 1 less than the number seen by the user.
+;; Returns:
+;; t if the diffs are whitespace in all buffers
+;; 'A (in 3-buf comparison only) if there are only whitespace
+;; diffs in bufs B and C
+;; 'B (in 3-buf comparison only) if there are only whitespace
+;; diffs in bufs A and C
+;; 'C (in 3-buf comparison only) if there are only whitespace
+;; diffs in bufs A and B
+;;
+;; A Difference Vector has the form:
+;; [diff diff diff ...]
+;; where each diff has the form:
+;; [overlay fine-diff-vector no-fine-diffs-flag state-of-difference]
+;; fine-diff-vector is a vector [fine-diff fine-diff fine-diff ...]
+;; no-fine-diffs-flag says if there are fine differences.
+;; state-of-difference is A, B, C, or nil, indicating which buffer is
+;; different from the other two (used only in 3-way jobs).
+(defmacro ediff-no-fine-diffs-p (n)
+ `(aref (ediff-get-difference ,n 'A) 2))
+
+(defmacro ediff-get-diff-overlay-from-diff-record (diff-rec)
+ `(aref ,diff-rec 0))
+
+(defmacro ediff-get-diff-overlay (n buf-type)
+ `(ediff-get-diff-overlay-from-diff-record
+ (ediff-get-difference ,n ,buf-type)))
+
+(defmacro ediff-get-fine-diff-vector-from-diff-record (diff-rec)
+ `(aref ,diff-rec 1))
+
+(defmacro ediff-set-fine-diff-vector (n buf-type fine-vec)
+ `(aset (ediff-get-difference ,n ,buf-type) 1 ,fine-vec))
+
+(defmacro ediff-get-state-of-diff (n buf-type)
+ `(if (ediff-buffer-live-p ediff-buffer-C)
+ (aref (ediff-get-difference ,n ,buf-type) 3)))
+(defmacro ediff-set-state-of-diff (n buf-type val)
+ `(aset (ediff-get-difference ,n ,buf-type) 3 ,val))
+
+(defmacro ediff-get-state-of-merge (n)
+ `(if ediff-state-of-merge
+ (aref (aref ediff-state-of-merge ,n) 0)))
+(defmacro ediff-set-state-of-merge (n val)
+ `(if ediff-state-of-merge
+ (aset (aref ediff-state-of-merge ,n) 0 ,val)))
+
+(defmacro ediff-get-state-of-ancestor (n)
+ `(if ediff-state-of-merge
+ (aref (aref ediff-state-of-merge ,n) 1)))
+
+;; if flag is t, puts a mark on diff region saying that
+;; the differences are in white space only. If flag is nil,
+;; the region is marked as essential (i.e., differences are
+;; not just in the white space and newlines.)
+(defmacro ediff-mark-diff-as-space-only (n flag)
+ `(aset (ediff-get-difference ,n 'A) 2 ,flag))
+
+(defmacro ediff-get-fine-diff-vector (n buf-type)
+ `(ediff-get-fine-diff-vector-from-diff-record
+ (ediff-get-difference ,n ,buf-type)))
+
+;; Macro to switch to BUFFER, evaluate BODY, returns to original buffer.
+;; Doesn't save the point and mark.
+;; This is `with-current-buffer' with the added test for live buffers."
+(defmacro ediff-with-current-buffer (buffer &rest body)
+ `(if (ediff-buffer-live-p ,buffer)
+ (save-current-buffer
+ (set-buffer ,buffer)
+ ,@body)
+ (or (eq this-command 'ediff-quit)
+ (error ediff-KILLED-VITAL-BUFFER))
+ ))
+
+
+(defsubst ediff-multiframe-setup-p ()
+ (and (ediff-window-display-p) ediff-multiframe))
+
+(defmacro ediff-narrow-control-frame-p ()
+ `(and (ediff-multiframe-setup-p)
+ (equal ediff-help-message ediff-brief-message-string)))
+
+(defmacro ediff-3way-comparison-job ()
+ `(memq
+ ediff-job-name
+ '(ediff-files3 ediff-buffers3)))
+(ediff-defvar-local ediff-3way-comparison-job nil "")
+
+(defmacro ediff-merge-job ()
+ `(memq
+ ediff-job-name
+ '(ediff-merge-files
+ ediff-merge-buffers
+ ediff-merge-files-with-ancestor
+ ediff-merge-buffers-with-ancestor
+ ediff-merge-revisions
+ ediff-merge-revisions-with-ancestor)))
+(ediff-defvar-local ediff-merge-job nil "")
+
+(defmacro ediff-patch-job ()
+ `(eq ediff-job-name 'epatch))
+
+(defmacro ediff-merge-with-ancestor-job ()
+ `(memq
+ ediff-job-name
+ '(ediff-merge-files-with-ancestor
+ ediff-merge-buffers-with-ancestor
+ ediff-merge-revisions-with-ancestor)))
+(ediff-defvar-local ediff-merge-with-ancestor-job nil "")
+
+(defmacro ediff-3way-job ()
+ `(or ediff-3way-comparison-job ediff-merge-job))
+(ediff-defvar-local ediff-3way-job nil "")
+
+;; A diff3 job is like a 3way job, but ediff-merge doesn't require the use
+;; of diff3.
+(defmacro ediff-diff3-job ()
+ `(or ediff-3way-comparison-job
+ ediff-merge-with-ancestor-job))
+(ediff-defvar-local ediff-diff3-job nil "")
+
+(defmacro ediff-windows-job ()
+ `(memq ediff-job-name '(ediff-windows-wordwise ediff-windows-linewise)))
+(ediff-defvar-local ediff-windows-job nil "")
+
+(defmacro ediff-word-mode-job ()
+ `(memq ediff-job-name '(ediff-windows-wordwise ediff-regions-wordwise)))
+(ediff-defvar-local ediff-word-mode-job nil "")
+
+(defmacro ediff-narrow-job ()
+ `(memq ediff-job-name '(ediff-windows-wordwise
+ ediff-regions-wordwise
+ ediff-windows-linewise
+ ediff-regions-linewise)))
+(ediff-defvar-local ediff-narrow-job nil "")
+
+;; Note: ediff-merge-directory-revisions-with-ancestor is not treated as an
+;; ancestor metajob, since it behaves differently.
+(defsubst ediff-ancestor-metajob (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-merge-directories-with-ancestor
+ ediff-merge-filegroups-with-ancestor)))
+(defsubst ediff-revision-metajob (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-directory-revisions
+ ediff-merge-directory-revisions
+ ediff-merge-directory-revisions-with-ancestor)))
+(defsubst ediff-patch-metajob (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-multifile-patch)))
+;; metajob involving only one group of files, such as multipatch or directory
+;; revision
+(defsubst ediff-one-filegroup-metajob (&optional metajob)
+ (or (ediff-revision-metajob metajob)
+ (ediff-patch-metajob metajob)
+ ;; add more here
+ ))
+;; jobs suitable for the operation of collecting diffs into a multifile patch
+(defsubst ediff-collect-diffs-metajob (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-directories
+ ediff-merge-directories
+ ediff-merge-directories-with-ancestor
+ ediff-directory-revisions
+ ediff-merge-directory-revisions
+ ediff-merge-directory-revisions-with-ancestor
+ ;; add more here
+ )))
+(defsubst ediff-merge-metajob (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-merge-directories
+ ediff-merge-directories-with-ancestor
+ ediff-merge-directory-revisions
+ ediff-merge-directory-revisions-with-ancestor
+ ediff-merge-filegroups-with-ancestor
+ ;; add more here
+ )))
+
+(defsubst ediff-metajob3 (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-merge-directories-with-ancestor
+ ediff-merge-filegroups-with-ancestor
+ ediff-directories3
+ ediff-filegroups3)))
+(defsubst ediff-comparison-metajob3 (&optional metajob)
+ (memq (or metajob ediff-metajob-name)
+ '(ediff-directories3 ediff-filegroups3)))
+
+;; with no argument, checks if we are in ediff-control-buffer
+;; with argument, checks if we are in ediff-meta-buffer
+(defun ediff-in-control-buffer-p (&optional meta-buf-p)
+ (and (boundp 'ediff-control-buffer)
+ (eq (if meta-buf-p ediff-meta-buffer ediff-control-buffer)
+ (current-buffer))))
+
+(defsubst ediff-barf-if-not-control-buffer (&optional meta-buf-p)
+ (or (ediff-in-control-buffer-p meta-buf-p)
+ (error "%S: This command runs in Ediff Control Buffer only!"
+ this-command)))
+
+(defgroup ediff-highlighting nil
+ "Hilighting of difference regions in Ediff"
+ :prefix "ediff-"
+ :group 'ediff)
+
+(defgroup ediff-merge nil
+ "Merging utilities"
+ :prefix "ediff-"
+ :group 'ediff)
+
+(defgroup ediff-hook nil
+ "Hooks run by Ediff"
+ :prefix "ediff-"
+ :group 'ediff)
+
+;; Hook variables
+
+(defcustom ediff-before-setup-hook nil
+ "*Hooks to run before Ediff begins to set up windows and buffers.
+This hook can be used to save the previous window config, which can be restored
+on ediff-quit or ediff-suspend."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-before-setup-windows-hook nil
+ "*Hooks to run before Ediff sets its window configuration.
+This hook is run every time when Ediff arranges its windows.
+This happens each time Ediff detects that the windows were messed up by the
+user."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-after-setup-windows-hook nil
+ "*Hooks to run after Ediff sets its window configuration.
+This can be used to set up control window or icon in a desired place."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-before-setup-control-frame-hook nil
+ "*Hooks run before setting up the frame to display Ediff Control Panel.
+Can be used to change control frame parameters to position it where it
+is desirable."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-after-setup-control-frame-hook nil
+ "*Hooks run after setting up the frame to display Ediff Control Panel.
+Can be used to move the frame where it is desired."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-startup-hook nil
+ "*Hooks to run in the control buffer after Ediff has been set up and is ready for the job."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-select-hook nil
+ "*Hooks to run after a difference has been selected."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-unselect-hook nil
+ "*Hooks to run after a difference has been unselected."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-prepare-buffer-hook nil
+ "*Hooks run after buffers A, B, and C are set up.
+For each buffer, the hooks are run with that buffer made current."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-load-hook nil
+ "*Hook run after Ediff is loaded. Can be used to change defaults."
+ :type 'hook
+ :group 'ediff-hook)
+
+(defcustom ediff-mode-hook nil
+ "*Hook run just after ediff-mode is set up in the control buffer.
+This is done before any windows or frames are created. One can use it to
+set local variables that determine how the display looks like."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-keymap-setup-hook nil
+ "*Hook run just after the default bindings in Ediff keymap are set up."
+ :type 'hook
+ :group 'ediff-hook)
+
+(defcustom ediff-display-help-hook nil
+ "*Hooks run after preparing the help message."
+ :type 'hook
+ :group 'ediff-hook)
+
+(defcustom ediff-suspend-hook nil
+ "*Hooks to run in the Ediff control buffer when Ediff is suspended."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-quit-hook nil
+ "*Hooks to run in the Ediff control buffer after finishing Ediff."
+ :type 'hook
+ :group 'ediff-hook)
+(defcustom ediff-cleanup-hook nil
+ "*Hooks to run on exiting Ediff but before killing the control and variant buffers."
+ :type 'hook
+ :group 'ediff-hook)
+
+;; Error messages
+(defconst ediff-KILLED-VITAL-BUFFER
+ "You have killed a vital Ediff buffer---you must leave Ediff now!")
+(defconst ediff-NO-DIFFERENCES
+ "Sorry, comparison of identical variants is not what I am made for...")
+(defconst ediff-BAD-DIFF-NUMBER
+ ;; %S stands for this-command, %d - diff number, %d - max diff
+ "%S: Bad diff region number, %d. Valid numbers are 1 to %d")
+(defconst ediff-BAD-INFO (format "
+*** The Info file for Ediff, a part of the standard distribution
+*** of %sEmacs, does not seem to be properly installed.
+***
+*** Please contact your system administrator. "
+ (if ediff-xemacs-p "X" "")))
+
+;; Selective browsing
+
+(ediff-defvar-local ediff-skip-diff-region-function 'ediff-show-all-diffs
+ "Function that determines the next/previous diff region to show.
+Should return t for regions to be ignored and nil otherwise.
+This function gets a region number as an argument. The region number
+is the one used internally by Ediff. It is 1 less than the number seen
+by the user.")
+
+(ediff-defvar-local ediff-hide-regexp-matches-function
+ 'ediff-hide-regexp-matches
+ "Function to use in determining which regions to hide.
+See the documentation string of `ediff-hide-regexp-matches' for details.")
+(ediff-defvar-local ediff-focus-on-regexp-matches-function
+ 'ediff-focus-on-regexp-matches
+ "Function to use in determining which regions to focus on.
+See the documentation string of `ediff-focus-on-regexp-matches' for details.")
+
+;; Regexp that determines buf A regions to focus on when skipping to diff
+(ediff-defvar-local ediff-regexp-focus-A "" "")
+;; Regexp that determines buf B regions to focus on when skipping to diff
+(ediff-defvar-local ediff-regexp-focus-B "" "")
+;; Regexp that determines buf C regions to focus on when skipping to diff
+(ediff-defvar-local ediff-regexp-focus-C "" "")
+;; connective that determines whether to focus regions that match both or
+;; one of the regexps
+(ediff-defvar-local ediff-focus-regexp-connective 'and "")
+
+;; Regexp that determines buf A regions to ignore when skipping to diff
+(ediff-defvar-local ediff-regexp-hide-A "" "")
+;; Regexp that determines buf B regions to ignore when skipping to diff
+(ediff-defvar-local ediff-regexp-hide-B "" "")
+;; Regexp that determines buf C regions to ignore when skipping to diff
+(ediff-defvar-local ediff-regexp-hide-C "" "")
+;; connective that determines whether to hide regions that match both or
+;; one of the regexps
+(ediff-defvar-local ediff-hide-regexp-connective 'and "")
+
+
+;;; Copying difference regions between buffers.
+
+;; A list of killed diffs.
+;; A diff is saved here if it is replaced by a diff
+;; from another buffer. This alist has the form:
+;; \((num (buff-object . diff) (buff-object . diff) (buff-object . diff)) ...),
+;; where some buffer-objects may be missing.
+(ediff-defvar-local ediff-killed-diffs-alist nil "")
+
+;; Syntax table to use in ediff-forward-word-function
+;; This is chosen by a heuristic. The important thing is for all buffers to
+;; have the same syntax table. Which is not too important.
+(ediff-defvar-local ediff-syntax-table nil "")
+
+
+;; Highlighting
+(defcustom ediff-before-flag-bol (if ediff-xemacs-p (make-glyph "->>") "->>")
+ "*Flag placed before a highlighted block of differences, if block starts at beginning of a line."
+ :type 'string
+ :tag "Region before-flag at beginning of line"
+ :group 'ediff)
+
+(defcustom ediff-after-flag-eol (if ediff-xemacs-p (make-glyph "<<-") "<<-")
+ "*Flag placed after a highlighted block of differences, if block ends at end of a line."
+ :type 'string
+ :tag "Region after-flag at end of line"
+ :group 'ediff)
+
+(defcustom ediff-before-flag-mol (if ediff-xemacs-p (make-glyph "->>") "->>")
+ "*Flag placed before a highlighted block of differences, if block starts in mid-line."
+ :type 'string
+ :tag "Region before-flag in the middle of line"
+ :group 'ediff)
+(defcustom ediff-after-flag-mol (if ediff-xemacs-p (make-glyph "<<-") "<<-")
+ "*Flag placed after a highlighted block of differences, if block ends in mid-line."
+ :type 'string
+ :tag "Region after-flag in the middle of line"
+ :group 'ediff)
+
+
+(ediff-defvar-local ediff-use-faces t "")
+(defcustom ediff-use-faces t
+ "If t, differences are highlighted using faces, if device supports faces.
+If nil, differences are highlighted using ASCII flags, ediff-before-flag
+and ediff-after-flag. On a non-window system, differences are always
+highlighted using ASCII flags."
+ :type 'boolean
+ :group 'ediff-highlighting)
+
+;; this indicates that diff regions are word-size, so fine diffs are
+;; permanently nixed; used in ediff-windows-wordwise and ediff-regions-wordwise
+(ediff-defvar-local ediff-word-mode nil "")
+;; Name of the job (ediff-files, ediff-windows, etc.)
+(ediff-defvar-local ediff-job-name nil "")
+
+;; Narrowing and ediff-region/windows support
+;; This is a list (overlay-A overlay-B overlay-C)
+;; If set, Ediff compares only those parts of buffers A/B/C that lie within
+;; the bounds of these overlays.
+(ediff-defvar-local ediff-narrow-bounds nil "")
+
+;; List (overlay-A overlay-B overlay-C), where each overlay spans the
+;; entire corresponding buffer.
+(ediff-defvar-local ediff-wide-bounds nil "")
+
+;; Current visibility boundaries in buffers A, B, and C.
+;; This is also a list of overlays. When the user toggles narrow/widen,
+;; this list changes from ediff-wide-bounds to ediff-narrow-bounds.
+;; and back.
+(ediff-defvar-local ediff-visible-bounds nil "")
+
+(ediff-defvar-local ediff-start-narrowed t
+ "Non-nil means start narrowed, if doing ediff-windows-* or ediff-regions-*")
+(ediff-defvar-local ediff-quit-widened t
+ "*Non-nil means: when finished, Ediff widens buffers A/B.
+Actually, Ediff restores the scope of visibility that existed at startup.")
+
+(defcustom ediff-keep-variants t
+ "*nil means prompt to remove unmodified buffers A/B/C at session end.
+Supplying a prefix argument to the quit command `q' temporarily reverses the
+meaning of this variable."
+ :type 'boolean
+ :group 'ediff)
+
+(ediff-defvar-local ediff-highlight-all-diffs t "")
+(defcustom ediff-highlight-all-diffs t
+ "If nil, only the selected differences are highlighted.
+Otherwise, all difference regions are highlighted, but the selected region is
+shown in brighter colors."
+ :type 'boolean
+ :group 'ediff-highlighting)
+
+
+;; The suffix of the control buffer name.
+(ediff-defvar-local ediff-control-buffer-suffix nil "")
+;; Same as ediff-control-buffer-suffix, but without <,>.
+;; It's a number rather than string.
+(ediff-defvar-local ediff-control-buffer-number nil "")
+
+
+;; The original values of ediff-protected-variables for buffer A
+(ediff-defvar-local ediff-buffer-values-orig-A nil "")
+;; The original values of ediff-protected-variables for buffer B
+(ediff-defvar-local ediff-buffer-values-orig-B nil "")
+;; The original values of ediff-protected-variables for buffer C
+(ediff-defvar-local ediff-buffer-values-orig-C nil "")
+;; The original values of ediff-protected-variables for buffer Ancestor
+(ediff-defvar-local ediff-buffer-values-orig-Ancestor nil "")
+
+;; association between buff-type and ediff-buffer-values-orig-*
+(defconst ediff-buffer-values-orig-alist
+ '((A . ediff-buffer-values-orig-A)
+ (B . ediff-buffer-values-orig-B)
+ (C . ediff-buffer-values-orig-C)
+ (Ancestor . ediff-buffer-values-orig-Ancestor)))
+
+;; Buffer-local variables to be saved then restored during Ediff sessions
+(defconst ediff-protected-variables '(
+ ;;buffer-read-only
+ mode-line-format))
+
+;; Vector of differences between the variants. Each difference is
+;; represented by a vector of two overlays plus a vector of fine diffs,
+;; plus a no-fine-diffs flag. The first overlay spans the
+;; difference region in the A buffer and the second overlays the diff in
+;; the B buffer. If a difference section is empty, the corresponding
+;; overlay's endpoints coincide.
+;;
+;; The precise form of a Difference Vector for one buffer is:
+;; [diff diff diff ...]
+;; where each diff has the form:
+;; [diff-overlay fine-diff-vector no-fine-diffs-flag state-of-diff]
+;; fine-diff-vector is a vector [fine-diff-overlay fine-diff-overlay ...]
+;; no-fine-diffs-flag says if there are fine differences.
+;; state-of-difference is A, B, C, or nil, indicating which buffer is
+;; different from the other two (used only in 3-way jobs.
+(ediff-defvar-local ediff-difference-vector-A nil "")
+(ediff-defvar-local ediff-difference-vector-B nil "")
+(ediff-defvar-local ediff-difference-vector-C nil "")
+(ediff-defvar-local ediff-difference-vector-Ancestor nil "")
+;; A-list of diff vector types associated with buffer types
+(defconst ediff-difference-vector-alist
+ '((A . ediff-difference-vector-A)
+ (B . ediff-difference-vector-B)
+ (C . ediff-difference-vector-C)
+ (Ancestor . ediff-difference-vector-Ancestor)))
+
+;; [ status status status ...]
+;; Each status: [state-of-merge state-of-ancestor]
+;; state-of-merge is default-A, default-B, prefer-A, or prefer-B. It
+;; indicates the way a diff region was created in buffer C.
+;; state-of-ancestor says if the corresponding region in ancestor buffer is
+;; empty.
+(ediff-defvar-local ediff-state-of-merge nil "")
+
+;; The difference that is currently selected.
+(ediff-defvar-local ediff-current-difference -1 "")
+;; Number of differences found.
+(ediff-defvar-local ediff-number-of-differences nil "")
+
+;; Buffer containing the output of diff, which is used by Ediff to step
+;; through files.
+(ediff-defvar-local ediff-diff-buffer nil "")
+;; Like ediff-diff-buffer, but contains context diff. It is not used by
+;; Ediff, but it is saved in a file, if user requests so.
+(ediff-defvar-local ediff-custom-diff-buffer nil "")
+;; Buffer used for diff-style fine differences between regions.
+(ediff-defvar-local ediff-fine-diff-buffer nil "")
+;; Temporary buffer used for computing fine differences.
+(defconst ediff-tmp-buffer " *ediff-tmp*" "")
+;; Buffer used for messages
+(defconst ediff-msg-buffer " *ediff-message*" "")
+;; Buffer containing the output of diff when diff returns errors.
+(ediff-defvar-local ediff-error-buffer nil "")
+;; Buffer to display debug info
+(ediff-defvar-local ediff-debug-buffer "*ediff-debug*" "")
+
+;; List of ediff control panels associated with each buffer A/B/C/Ancestor.
+;; Not used any more, but may be needed in the future.
+(ediff-defvar-local ediff-this-buffer-ediff-sessions nil "")
+
+;; to be deleted in due time
+;; List of difference overlays disturbed by working with the current diff.
+(defvar ediff-disturbed-overlays nil "")
+
+;; Priority of non-selected overlays.
+(defvar ediff-shadow-overlay-priority 100 "")
+
+(defcustom ediff-version-control-package 'vc
+ "Version control package used.
+Currently, Ediff supports vc.el, rcs.el, pcl-cvs.el, and generic-sc.el. The
+standard Emacs interface to RCS, CVS, SCCS, etc., is vc.el. However, some
+people find the other two packages more convenient. Set this variable to the
+appropriate symbol: `rcs', `pcl-cvs', or `generic-sc' if you so desire."
+ :type 'symbol
+ :group 'ediff)
+
+(defcustom ediff-coding-system-for-read 'raw-text
+ "*The coding system for read to use when running the diff program as a subprocess.
+In most cases, the default will do. However, under certain circumstances in
+Windows NT/98/95 you might need to use something like 'raw-text-dos here.
+So, if the output that your diff program sends to Emacs contains extra ^M's,
+you might need to experiment here, if the default or 'raw-text-dos doesn't
+work."
+ :type 'symbol
+ :group 'ediff)
+
+(defcustom ediff-coding-system-for-write 'no-conversion
+ "*The coding system for write to use when writing out difference regions
+to temp files when Ediff needs to find fine differences."
+ :type 'symbol
+ :group 'ediff)
+
+
+(ediff-cond-compile-for-xemacs-or-emacs
+ (progn ; xemacs
+ (defalias 'ediff-read-event 'next-command-event)
+ (defalias 'ediff-overlayp 'extentp)
+ (defalias 'ediff-make-overlay 'make-extent)
+ (defalias 'ediff-delete-overlay 'delete-extent))
+ (progn ; emacs
+ (defalias 'ediff-read-event 'read-event)
+ (defalias 'ediff-overlayp 'overlayp)
+ (defalias 'ediff-make-overlay 'make-overlay)
+ (defalias 'ediff-delete-overlay 'delete-overlay))
+ )
+
+;; Check the current version against the major and minor version numbers
+;; using op: cur-vers op major.minor If emacs-major-version or
+;; emacs-minor-version are not defined, we assume that the current version
+;; is hopelessly outdated. We assume that emacs-major-version and
+;; emacs-minor-version are defined. Otherwise, for Emacs/XEmacs 19, if the
+;; current minor version is < 10 (xemacs) or < 23 (emacs) the return value
+;; will be nil (when op is =, >, or >=) and t (when op is <, <=), which may be
+;; incorrect. However, this gives correct result in our cases, since we are
+;; testing for sufficiently high Emacs versions.
+(defun ediff-check-version (op major minor &optional type-of-emacs)
+ (if (and (boundp 'emacs-major-version) (boundp 'emacs-minor-version))
+ (and (cond ((eq type-of-emacs 'xemacs) ediff-xemacs-p)
+ ((eq type-of-emacs 'emacs) ediff-emacs-p)
+ (t t))
+ (cond ((eq op '=) (and (= emacs-minor-version minor)
+ (= emacs-major-version major)))
+ ((memq op '(> >= < <=))
+ (and (or (funcall op emacs-major-version major)
+ (= emacs-major-version major))
+ (if (= emacs-major-version major)
+ (funcall op emacs-minor-version minor)
+ t)))
+ (t
+ (error "%S: Invalid op in ediff-check-version" op))))
+ (cond ((memq op '(= > >=)) nil)
+ ((memq op '(< <=)) t))))
+
+
+(defun ediff-color-display-p ()
+ (condition-case nil
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (eq (device-class (selected-device)) 'color) ; xemacs form
+ (if (fboundp 'display-color-p) ; emacs form
+ (display-color-p)
+ (x-display-color-p))
+ )
+ (error nil)))
+
+
+;; A var local to each control panel buffer. Indicates highlighting style
+;; in effect for this buffer: `face', `ascii',
+;; `off' -- turned off \(on a dumb terminal only\).
+(ediff-defvar-local ediff-highlighting-style
+ (if (and (ediff-has-face-support-p) ediff-use-faces) 'face 'ascii)
+ "")
+
+
+(if (ediff-has-face-support-p)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (progn ; xemacs
+ (defalias 'ediff-valid-color-p 'valid-color-name-p)
+ (defalias 'ediff-get-face 'get-face))
+ (progn ; emacs
+ (defalias 'ediff-valid-color-p (if (fboundp 'color-defined-p)
+ 'color-defined-p
+ 'x-color-defined-p))
+ (defalias 'ediff-get-face 'internal-get-face))
+ ))
+
+(if (ediff-window-display-p)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (progn ; xemacs
+ (defalias 'ediff-display-pixel-width 'device-pixel-width)
+ (defalias 'ediff-display-pixel-height 'device-pixel-height))
+ (progn ; emacs
+ (defalias 'ediff-display-pixel-width
+ (if (fboundp 'display-pixel-width)
+ 'display-pixel-width
+ 'x-display-pixel-width))
+ (defalias 'ediff-display-pixel-height
+ (if (fboundp 'display-pixel-height)
+ 'display-pixel-height
+ 'x-display-pixel-height)))
+ ))
+
+;; A-list of current-diff-overlay symbols associated with buf types
+(defconst ediff-current-diff-overlay-alist
+ '((A . ediff-current-diff-overlay-A)
+ (B . ediff-current-diff-overlay-B)
+ (C . ediff-current-diff-overlay-C)
+ (Ancestor . ediff-current-diff-overlay-Ancestor)))
+
+;; A-list of current-diff-face-* symbols associated with buf types
+(defconst ediff-current-diff-face-alist
+ '((A . ediff-current-diff-face-A)
+ (B . ediff-current-diff-face-B)
+ (C . ediff-current-diff-face-C)
+ (Ancestor . ediff-current-diff-face-Ancestor)))
+
+
+(defun ediff-set-overlay-face (extent face)
+ (ediff-overlay-put extent 'face face)
+ (ediff-overlay-put extent 'help-echo 'ediff-region-help-echo))
+
+(defun ediff-region-help-echo (extent-or-window &optional overlay point)
+ (unless overlay
+ (setq overlay extent-or-window))
+ (let ((is-current (ediff-overlay-get overlay 'ediff))
+ (face (ediff-overlay-get overlay 'face))
+ (diff-num (ediff-overlay-get overlay 'ediff-diff-num))
+ face-help)
+
+ ;; This happens only for refinement overlays
+ (if (stringp face)
+ (setq face (intern face)))
+ (setq face-help (and face (get face 'ediff-help-echo)))
+
+ (cond ((and is-current diff-num) ; current diff region
+ (format "Difference region %S -- current" (1+ diff-num)))
+ (face-help) ; refinement of current diff region
+ (diff-num ; non-current
+ (format "Difference region %S -- non-current" (1+ diff-num)))
+ (t "")) ; none
+ ))
+
+
+(defun ediff-set-face-pixmap (face pixmap)
+ "Set face pixmap on a monochrome display."
+ (if (and (ediff-window-display-p) (not (ediff-color-display-p)))
+ (condition-case nil
+ (set-face-background-pixmap face pixmap)
+ (error
+ (message "Pixmap not found for %S: %s" (face-name face) pixmap)
+ (sit-for 1)))))
+
+(defun ediff-hide-face (face)
+ (if (and (ediff-has-face-support-p) (boundp 'add-to-list)
+ (boundp 'facemenu-unlisted-faces))
+ (add-to-list 'facemenu-unlisted-faces face)))
+
+
+
+(defface ediff-current-diff-face-A
+ '((((type tty)) (:foreground "blue3" :background "yellow3"))
+ (((class color)) (:foreground "firebrick" :background "pale green"))
+ (t (:inverse-video t)))
+ "Face for highlighting the selected difference in buffer A."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-current-diff-face-A 'ediff-current-diff-face-A
+ "Face for highlighting the selected difference in buffer A.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-current-diff-face-A'
+this variable represents.")
+(ediff-hide-face 'ediff-current-diff-face-A)
+;; Until custom.el for XEmacs starts supporting :inverse-video we do this.
+;; This means that some user customization may be trashed.
+(if (and ediff-xemacs-p
+ (ediff-has-face-support-p)
+ (not (ediff-color-display-p)))
+ (copy-face 'modeline 'ediff-current-diff-face-A))
+
+
+
+(defface ediff-current-diff-face-B
+ '((((type tty)) (:foreground "magenta3" :background "yellow3"
+ :weight bold))
+ (((class color)) (:foreground "DarkOrchid" :background "Yellow"))
+ (t (:inverse-video t)))
+ "Face for highlighting the selected difference in buffer B."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-current-diff-face-B 'ediff-current-diff-face-B
+ "Face for highlighting the selected difference in buffer B.
+ this variable. Instead, use the customization
+widget to customize the actual face `ediff-current-diff-face-B'
+this variable represents.")
+(ediff-hide-face 'ediff-current-diff-face-B)
+;; Until custom.el for XEmacs starts supporting :inverse-video we do this.
+;; This means that some user customization may be trashed.
+(if (and ediff-xemacs-p
+ (ediff-has-face-support-p)
+ (not (ediff-color-display-p)))
+ (copy-face 'modeline 'ediff-current-diff-face-B))
+
+
+(defface ediff-current-diff-face-C
+ '((((type tty)) (:foreground "cyan3" :background "yellow3" :weight bold))
+ (((class color)) (:foreground "Navy" :background "Pink"))
+ (t (:inverse-video t)))
+ "Face for highlighting the selected difference in buffer C."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-current-diff-face-C 'ediff-current-diff-face-C
+ "Face for highlighting the selected difference in buffer C.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-current-diff-face-C'
+this variable represents.")
+(ediff-hide-face 'ediff-current-diff-face-C)
+;; Until custom.el for XEmacs starts supporting :inverse-video we do this.
+;; This means that some user customization may be trashed.
+(if (and ediff-xemacs-p
+ (ediff-has-face-support-p)
+ (not (ediff-color-display-p)))
+ (copy-face 'modeline 'ediff-current-diff-face-C))
+
+
+(defface ediff-current-diff-face-Ancestor
+ '((((type tty)) (:foreground "black" :background "magenta3"))
+ (((class color)) (:foreground "Black" :background "VioletRed"))
+ (t (:inverse-video t)))
+ "Face for highlighting the selected difference in buffer Ancestor."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-current-diff-face-Ancestor 'ediff-current-diff-face-Ancestor
+ "Face for highlighting the selected difference in buffer Ancestor.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-current-diff-face-Ancestor'
+this variable represents.")
+(ediff-hide-face 'ediff-current-diff-face-Ancestor)
+;; Until custom.el for XEmacs starts supporting :inverse-video we do this.
+;; This means that some user customization may be trashed.
+(if (and ediff-xemacs-p
+ (ediff-has-face-support-p)
+ (not (ediff-color-display-p)))
+ (copy-face 'modeline 'ediff-current-diff-face-Ancestor))
+
+
+(defface ediff-fine-diff-face-A
+ '((((type tty)) (:foreground "white" :background "sky blue" :weight bold))
+ (((class color)) (:foreground "Navy" :background "sky blue"))
+ (t (:underline t :stipple "gray3")))
+ "Face for highlighting the refinement of the selected diff in buffer A."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-fine-diff-face-A 'ediff-fine-diff-face-A
+ "Face for highlighting the fine differences in buffer A.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-fine-diff-face-A'
+this variable represents.")
+(ediff-hide-face 'ediff-fine-diff-face-A)
+
+(defface ediff-fine-diff-face-B
+ '((((type tty)) (:foreground "magenta3" :background "cyan3"))
+ (((class color)) (:foreground "Black" :background "cyan"))
+ (t (:underline t :stipple "gray3")))
+ "Face for highlighting the refinement of the selected diff in buffer B."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-fine-diff-face-B 'ediff-fine-diff-face-B
+ "Face for highlighting the fine differences in buffer B.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-fine-diff-face-B'
+this variable represents.")
+(ediff-hide-face 'ediff-fine-diff-face-B)
+
+(defface ediff-fine-diff-face-C
+ '((((type tty)) (:foreground "yellow3" :background "Turquoise"
+ :weight bold))
+ (((type pc)) (:foreground "white" :background "Turquoise"))
+ (((class color)) (:foreground "Black" :background "Turquoise"))
+ (t (:underline t :stipple "gray3")))
+ "Face for highlighting the refinement of the selected diff in buffer C."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-fine-diff-face-C 'ediff-fine-diff-face-C
+ "Face for highlighting the fine differences in buffer C.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-fine-diff-face-C'
+this variable represents.")
+(ediff-hide-face 'ediff-fine-diff-face-C)
+
+(defface ediff-fine-diff-face-Ancestor
+ '((((type tty)) (:foreground "red3" :background "green"))
+ (((class color)) (:foreground "Black" :background "Green"))
+ (t (:underline t :stipple "gray3")))
+ "Face for highlighting the refinement of the selected diff in the ancestor buffer.
+At present, this face is not used and no fine differences are computed for the
+ancestor buffer."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-fine-diff-face-Ancestor 'ediff-fine-diff-face-Ancestor
+ "Face for highlighting the fine differences in buffer Ancestor.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-fine-diff-face-Ancestor'
+this variable represents.")
+(ediff-hide-face 'ediff-fine-diff-face-Ancestor)
+
+;; Some installs don't have stipple or Stipple. So, try them in turn.
+(defvar stipple-pixmap
+ (cond ((not (ediff-has-face-support-p)) nil)
+ ((and (boundp 'x-bitmap-file-path)
+ (locate-library "stipple" t x-bitmap-file-path)) "stipple")
+ ((and (boundp 'mswindowsx-bitmap-file-path)
+ (locate-library "stipple" t mswindowsx-bitmap-file-path)) "stipple")
+ (t "Stipple")))
+
+(defface ediff-even-diff-face-A
+ `((((type tty)) (:foreground "red3" :background "light grey"
+ :weight bold))
+ (((type pc)) (:foreground "green3" :background "light grey"))
+ (((class color)) (:foreground "Black" :background "light grey"))
+ (t (:italic t :stipple ,stipple-pixmap)))
+ "Face for highlighting even-numbered non-current differences in buffer A."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-even-diff-face-A 'ediff-even-diff-face-A
+ "Face for highlighting even-numbered non-current differences in buffer A.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-even-diff-face-A'
+this variable represents.")
+(ediff-hide-face 'ediff-even-diff-face-A)
+
+(defface ediff-even-diff-face-B
+ `((((type tty)) (:foreground "blue3" :background "Grey" :weight bold))
+ (((class color)) (:foreground "White" :background "Grey"))
+ (t (:italic t :stipple ,stipple-pixmap)))
+ "Face for highlighting even-numbered non-current differences in buffer B."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-even-diff-face-B 'ediff-even-diff-face-B
+ "Face for highlighting even-numbered non-current differences in buffer B.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-even-diff-face-B'
+this variable represents.")
+(ediff-hide-face 'ediff-even-diff-face-B)
+
+(defface ediff-even-diff-face-C
+ `((((type tty)) (:foreground "yellow3" :background "light grey"
+ :weight bold))
+ (((type pc)) (:foreground "yellow3" :background "light grey"))
+ (((class color)) (:foreground "Black" :background "light grey"))
+ (t (:italic t :stipple ,stipple-pixmap)))
+ "Face for highlighting even-numbered non-current differences in buffer C."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-even-diff-face-C 'ediff-even-diff-face-C
+ "Face for highlighting even-numbered non-current differences in buffer C.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-even-diff-face-C'
+this variable represents.")
+(ediff-hide-face 'ediff-even-diff-face-C)
+
+(defface ediff-even-diff-face-Ancestor
+ `((((type tty)) (:foreground "cyan3" :background "light grey"
+ :weight bold))
+ (((type pc)) (:foreground "cyan3" :background "light grey"))
+ (((class color)) (:foreground "White" :background "Grey"))
+ (t (:italic t :stipple ,stipple-pixmap)))
+ "Face for highlighting even-numbered non-current differences in the ancestor buffer."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-even-diff-face-Ancestor 'ediff-even-diff-face-Ancestor
+ "Face for highlighting even-numbered non-current differences in buffer Ancestor.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-even-diff-face-Ancestor'
+this variable represents.")
+(ediff-hide-face 'ediff-even-diff-face-Ancestor)
+
+;; Association between buffer types and even-diff-face symbols
+(defconst ediff-even-diff-face-alist
+ '((A . ediff-even-diff-face-A)
+ (B . ediff-even-diff-face-B)
+ (C . ediff-even-diff-face-C)
+ (Ancestor . ediff-even-diff-face-Ancestor)))
+
+(defface ediff-odd-diff-face-A
+ '((((type tty)) (:foreground "red3" :background "black" :weight bold))
+ (((type pc)) (:foreground "green3" :background "gray40"))
+ (((class color)) (:foreground "White" :background "Grey"))
+ (t (:italic t :stipple "gray1")))
+ "Face for highlighting odd-numbered non-current differences in buffer A."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-odd-diff-face-A 'ediff-odd-diff-face-A
+ "Face for highlighting odd-numbered non-current differences in buffer A.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-odd-diff-face-A'
+this variable represents.")
+(ediff-hide-face 'ediff-odd-diff-face-A)
+
+
+(defface ediff-odd-diff-face-B
+ '((((type tty)) (:foreground "cyan3" :background "black" :weight bold))
+ (((type pc)) (:foreground "White" :background "gray40"))
+ (((class color)) (:foreground "Black" :background "light grey"))
+ (t (:italic t :stipple "gray1")))
+ "Face for highlighting odd-numbered non-current differences in buffer B."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-odd-diff-face-B 'ediff-odd-diff-face-B
+ "Face for highlighting odd-numbered non-current differences in buffer B.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-odd-diff-face-B'
+this variable represents.")
+(ediff-hide-face 'ediff-odd-diff-face-B)
+
+(defface ediff-odd-diff-face-C
+ '((((type tty)) (:foreground "yellow3" :background "black" :weight bold))
+ (((type pc)) (:foreground "yellow3" :background "gray40"))
+ (((class color)) (:foreground "White" :background "Grey"))
+ (t (:italic t :stipple "gray1")))
+ "Face for highlighting odd-numbered non-current differences in buffer C."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-odd-diff-face-C 'ediff-odd-diff-face-C
+ "Face for highlighting odd-numbered non-current differences in buffer C.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-odd-diff-face-C'
+this variable represents.")
+(ediff-hide-face 'ediff-odd-diff-face-C)
+
+(defface ediff-odd-diff-face-Ancestor
+ '((((type tty)) (:foreground "green3" :background "black" :weight bold))
+ (((class color)) (:foreground "cyan3" :background "gray40"))
+ (t (:italic t :stipple "gray1")))
+ "Face for highlighting odd-numbered non-current differences in the ancestor buffer."
+ :group 'ediff-highlighting)
+;; An internal variable. Ediff takes the face from here. When unhighlighting,
+;; this variable is set to nil, then again to the appropriate face.
+(defvar ediff-odd-diff-face-Ancestor 'ediff-odd-diff-face-Ancestor
+ "Face for highlighting odd-numbered non-current differences in buffer Ancestor.
+DO NOT CHANGE this variable. Instead, use the customization
+widget to customize the actual face object `ediff-odd-diff-face-Ancestor'
+this variable represents.")
+(ediff-hide-face 'ediff-odd-diff-face-Ancestor)
+
+;; Association between buffer types and odd-diff-face symbols
+(defconst ediff-odd-diff-face-alist
+ '((A . ediff-odd-diff-face-A)
+ (B . ediff-odd-diff-face-B)
+ (C . ediff-odd-diff-face-C)
+ (Ancestor . ediff-odd-diff-face-Ancestor)))
+
+;; A-list of fine-diff face symbols associated with buffer types
+(defconst ediff-fine-diff-face-alist
+ '((A . ediff-fine-diff-face-A)
+ (B . ediff-fine-diff-face-B)
+ (C . ediff-fine-diff-face-C)
+ (Ancestor . ediff-fine-diff-face-Ancestor)))
+
+;; Help echo
+(put 'ediff-fine-diff-face-A 'ediff-help-echo
+ "A `refinement' of the current difference region")
+(put 'ediff-fine-diff-face-B 'ediff-help-echo
+ "A `refinement' of the current difference region")
+(put 'ediff-fine-diff-face-C 'ediff-help-echo
+ "A `refinement' of the current difference region")
+(put 'ediff-fine-diff-face-Ancestor 'ediff-help-echo
+ "A `refinement' of the current difference region")
+
+(add-hook 'ediff-quit-hook 'ediff-cleanup-mess)
+(add-hook 'ediff-suspend-hook 'ediff-default-suspend-function)
+
+
+;;; Overlays
+
+(ediff-defvar-local ediff-current-diff-overlay-A nil
+ "Overlay for the current difference region in buffer A.")
+(ediff-defvar-local ediff-current-diff-overlay-B nil
+ "Overlay for the current difference region in buffer B.")
+(ediff-defvar-local ediff-current-diff-overlay-C nil
+ "Overlay for the current difference region in buffer C.")
+(ediff-defvar-local ediff-current-diff-overlay-Ancestor nil
+ "Overlay for the current difference region in the ancestor buffer.")
+
+;; Compute priority of a current ediff overlay.
+(defun ediff-highest-priority (start end buffer)
+ (let ((pos (max 1 (1- start)))
+ ovr-list)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (1+ ediff-shadow-overlay-priority) ; xemacs form
+ ;; emacs form
+ (ediff-with-current-buffer buffer
+ (while (< pos (min (point-max) (1+ end)))
+ (setq ovr-list (append (overlays-at pos) ovr-list))
+ (setq pos (next-overlay-change pos)))
+ (+ 1 ediff-shadow-overlay-priority
+ (apply 'max
+ (cons
+ 1
+ (mapcar
+ (lambda (ovr)
+ (if (and ovr
+ ;; exclude ediff overlays from priority
+ ;; calculation, or else priority will keep
+ ;; increasing
+ (null (ediff-overlay-get ovr 'ediff))
+ (null (ediff-overlay-get ovr 'ediff-diff-num)))
+ ;; use the overlay priority or 0
+ (or (ediff-overlay-get ovr 'priority) 0)
+ 0))
+ ovr-list)
+ )
+ )))
+ ) ; ediff-cond-compile-for-xemacs-or-emacs
+ ))
+
+
+(defvar ediff-toggle-read-only-function nil
+ "*Specifies the function to be used to toggle read-only.
+If nil, Ediff tries to deduce the function from the binding of C-x C-q.
+Normally, this is the `toggle-read-only' function, but, if version
+control is used, it could be `vc-toggle-read-only' or `rcs-toggle-read-only'.")
+
+(defcustom ediff-make-buffers-readonly-at-startup nil
+ "*Make all variant buffers read-only when Ediff starts up.
+This property can be toggled interactively."
+ :type 'boolean
+ :group 'ediff)
+
+
+;;; Misc
+
+;; if nil, this silences some messages
+(defvar ediff-verbose-p t)
+
+(defcustom ediff-autostore-merges 'group-jobs-only
+ "*Save the results of merge jobs automatically.
+nil means don't save automatically. t means always save. Anything else
+means save automatically only if the merge job is part of a group of jobs, such
+as `ediff-merge-directory' or `ediff-merge-directory-revisions'."
+ :type '(choice (const nil) (const t) (const group-jobs-only))
+ :group 'ediff-merge)
+(make-variable-buffer-local 'ediff-autostore-merges)
+
+;; file where the result of the merge is to be saved. used internally
+(ediff-defvar-local ediff-merge-store-file nil "")
+
+(defcustom ediff-merge-filename-prefix "merge_"
+ "*Prefix to be attached to saved merge buffers."
+ :type 'string
+ :group 'ediff-merge)
+
+(defcustom ediff-no-emacs-help-in-control-buffer nil
+ "*Non-nil means C-h should not invoke Emacs help in control buffer.
+Instead, C-h would jump to previous difference."
+ :type 'boolean
+ :group 'ediff)
+
+;; This is the same as temporary-file-directory from Emacs 20.3.
+;; Copied over here because XEmacs doesn't have this variable.
+(defcustom ediff-temp-file-prefix
+ (file-name-as-directory
+ (cond ((boundp 'temporary-file-directory) temporary-file-directory)
+ ((fboundp 'temp-directory) (temp-directory))
+ (t "/tmp/")))
+;;; (file-name-as-directory
+;;; (cond ((memq system-type '(ms-dos windows-nt))
+;;; (or (getenv "TEMP") (getenv "TMPDIR") (getenv "TMP") "c:/temp"))
+;;; ((memq system-type '(vax-vms axp-vms))
+;;; (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "SYS$SCRATCH:"))
+;;; (t
+;;; (or (getenv "TMPDIR") (getenv "TMP") (getenv "TEMP") "/tmp"))))
+ "*Prefix to put on Ediff temporary file names.
+Do not start with `~/' or `~USERNAME/'."
+ :type 'string
+ :group 'ediff)
+
+(defcustom ediff-temp-file-mode 384 ; u=rw only
+ "*Mode for Ediff temporary files."
+ :type 'integer
+ :group 'ediff)
+
+;; Metacharacters that have to be protected from the shell when executing
+;; a diff/diff3 command.
+(defcustom ediff-metachars "[ \t\n!\"#$&'()*;<=>?[\\^`{|~]"
+ "Regexp that matches characters that must be quoted with `\\' in shell command line.
+This default should work without changes."
+ :type 'string
+ :group 'ediff)
+
+;; needed to simulate frame-char-width in XEmacs.
+(defvar ediff-H-glyph (if ediff-xemacs-p (make-glyph "H")))
+
+
+;; Temporary file used for refining difference regions in buffer A.
+(ediff-defvar-local ediff-temp-file-A nil "")
+;; Temporary file used for refining difference regions in buffer B.
+(ediff-defvar-local ediff-temp-file-B nil "")
+;; Temporary file used for refining difference regions in buffer C.
+(ediff-defvar-local ediff-temp-file-C nil "")
+
+
+;; If file-remote-p is defined (as in XEmacs, use it. Otherwise, check
+;; if find-file-name-handler is defined for 'file-local-copy
+(defun ediff-file-remote-p (file-name)
+ (or (and (fboundp 'file-remote-p) (file-remote-p file-name))
+ (find-file-name-handler file-name 'file-local-copy)))
+
+;; File for which we can get attributes, such as size or date
+(defun ediff-listable-file (file-name)
+ (let ((handler (find-file-name-handler file-name 'file-local-copy)))
+ (or (null handler) (eq handler 'dired-handler-fn))))
+
+
+(defsubst ediff-frame-unsplittable-p (frame)
+ (cdr (assq 'unsplittable (frame-parameters frame))))
+
+(defsubst ediff-get-next-window (wind prev-wind)
+ (cond ((window-live-p wind) wind)
+ (prev-wind (next-window wind))
+ (t (selected-window))
+ ))
+
+
+(defsubst ediff-kill-buffer-carefully (buf)
+ "Kill buffer BUF if it exists."
+ (if (ediff-buffer-live-p buf)
+ (kill-buffer (get-buffer buf))))
+
+(defsubst ediff-background-face (buf-type dif-num)
+ ;; The value of dif-num is always 1- the one that user sees.
+ ;; This is why even face is used when dif-num is odd.
+ (ediff-get-symbol-from-alist
+ buf-type (if (ediff-odd-p dif-num)
+ ediff-even-diff-face-alist
+ ediff-odd-diff-face-alist)
+ ))
+
+
+;; activate faces on diff regions in buffer
+(defun ediff-paint-background-regions-in-one-buffer (buf-type unhighlight)
+ (let ((diff-vector
+ (eval (ediff-get-symbol-from-alist
+ buf-type ediff-difference-vector-alist)))
+ overl diff-num)
+ (mapcar (lambda (rec)
+ (setq overl (ediff-get-diff-overlay-from-diff-record rec)
+ diff-num (ediff-overlay-get overl 'ediff-diff-num))
+ (if (ediff-overlay-buffer overl)
+ ;; only if overlay is alive
+ (ediff-set-overlay-face
+ overl
+ (if (not unhighlight)
+ (ediff-background-face buf-type diff-num))))
+ )
+ diff-vector)))
+
+
+;; activate faces on diff regions in all buffers
+(defun ediff-paint-background-regions (&optional unhighlight)
+ (ediff-paint-background-regions-in-one-buffer
+ 'A unhighlight)
+ (ediff-paint-background-regions-in-one-buffer
+ 'B unhighlight)
+ (ediff-paint-background-regions-in-one-buffer
+ 'C unhighlight)
+ (ediff-paint-background-regions-in-one-buffer
+ 'Ancestor unhighlight))
+
+
+;; arg is a record for a given diff in a difference vector
+;; this record is itself a vector
+(defsubst ediff-clear-fine-diff-vector (diff-record)
+ (if diff-record
+ (mapcar 'ediff-delete-overlay
+ (ediff-get-fine-diff-vector-from-diff-record diff-record))))
+
+(defsubst ediff-clear-fine-differences-in-one-buffer (n buf-type)
+ (ediff-clear-fine-diff-vector (ediff-get-difference n buf-type))
+ (ediff-set-fine-diff-vector n buf-type nil))
+
+(defsubst ediff-clear-fine-differences (n)
+ (ediff-clear-fine-differences-in-one-buffer n 'A)
+ (ediff-clear-fine-differences-in-one-buffer n 'B)
+ (if ediff-3way-job
+ (ediff-clear-fine-differences-in-one-buffer n 'C)))
+
+
+(defsubst ediff-mouse-event-p (event)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (button-event-p event) ; xemacs form
+ (string-match "mouse" (format "%S" (event-basic-type event))) ; emacs form
+ ))
+
+
+(defsubst ediff-key-press-event-p (event)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (key-press-event-p event) ; xemacs form
+ (or (char-or-string-p event) (symbolp event)) ; emacs form
+ ))
+
+(defun ediff-event-point (event)
+ (cond ((ediff-mouse-event-p event)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (event-point event) ; xemacs form
+ (posn-point (event-start event)) ; emacs form
+ )
+ )
+ ((ediff-key-press-event-p event)
+ (point))
+ (t (error nil))))
+
+(defun ediff-event-buffer (event)
+ (cond ((ediff-mouse-event-p event)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (event-buffer event) ; xemacs form
+ (window-buffer (posn-window (event-start event))) ; emacs form
+ )
+ )
+ ((ediff-key-press-event-p event)
+ (current-buffer))
+ (t (error nil))))
+
+(defun ediff-event-key (event-or-key)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (if (eventp event-or-key) (event-key event-or-key) event-or-key) ; xemacs
+ event-or-key ; emacs form
+ ))
+
+
+(defsubst ediff-frame-iconified-p (frame)
+ (if (and (ediff-window-display-p) (frame-live-p frame))
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (frame-iconified-p frame) ; xemacs form
+ (eq (frame-visible-p frame) 'icon) ; emacs form
+ )
+ ))
+
+(defsubst ediff-window-visible-p (wind)
+ ;; under TTY, window-live-p also means window is visible
+ (and (window-live-p wind)
+ (or (not (ediff-window-display-p))
+ (frame-visible-p (window-frame wind)))))
+
+
+(defsubst ediff-frame-char-width (frame)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (/ (frame-pixel-width frame) (frame-width frame)) ; xemacs
+ (frame-char-width frame) ; emacs
+ ))
+
+(defun ediff-reset-mouse (&optional frame do-not-grab-mouse)
+ (or frame (setq frame (selected-frame)))
+ (if (ediff-window-display-p)
+ (let ((frame-or-wind frame))
+ (if ediff-xemacs-p
+ (setq frame-or-wind (frame-selected-window frame)))
+ (or do-not-grab-mouse
+ ;; don't set mouse if the user said to never do this
+ (not ediff-grab-mouse)
+ ;; Don't grab on quit, if the user doesn't want to.
+ ;; If ediff-grab-mouse = t, then mouse won't be grabbed for
+ ;; sessions that are not part of a group (this is done in
+ ;; ediff-recenter). The condition below affects only terminating
+ ;; sessions in session groups (in which case mouse is warped into
+ ;; a meta buffer).
+ (and (eq ediff-grab-mouse 'maybe)
+ (memq this-command '(ediff-quit ediff-update-diffs)))
+ (set-mouse-position frame-or-wind 1 0))
+ )))
+
+(defsubst ediff-spy-after-mouse ()
+ (setq ediff-mouse-pixel-position (mouse-pixel-position)))
+
+;; It is not easy to find out when the user grabs the mouse, since emacs and
+;; xemacs behave differently when mouse is not in any frame. Also, this is
+;; sensitive to when the user grabbed mouse. Not used for now.
+(defun ediff-user-grabbed-mouse ()
+ (if ediff-mouse-pixel-position
+ (cond ((not (eq (car ediff-mouse-pixel-position)
+ (car (mouse-pixel-position)))))
+ ((and (car (cdr ediff-mouse-pixel-position))
+ (car (cdr (mouse-pixel-position)))
+ (cdr (cdr ediff-mouse-pixel-position))
+ (cdr (cdr (mouse-pixel-position))))
+ (not (and (< (abs (- (car (cdr ediff-mouse-pixel-position))
+ (car (cdr (mouse-pixel-position)))))
+ ediff-mouse-pixel-threshold)
+ (< (abs (- (cdr (cdr ediff-mouse-pixel-position))
+ (cdr (cdr (mouse-pixel-position)))))
+ ediff-mouse-pixel-threshold))))
+ (t nil))))
+
+(defsubst ediff-frame-char-height (frame)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (glyph-height ediff-H-glyph (frame-selected-window frame)) ; xemacs case
+ (frame-char-height frame) ; emacs case
+ )
+ )
+
+;; Some overlay functions
+
+(defsubst ediff-overlay-start (overl)
+ (if (ediff-overlayp overl)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (extent-start-position overl) ; xemacs form
+ (overlay-start overl) ; emacs form
+ )
+ ))
+
+(defsubst ediff-overlay-end (overl)
+ (if (ediff-overlayp overl)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (extent-end-position overl) ; xemacs form
+ (overlay-end overl) ; emacs form
+ )
+ ))
+
+(defsubst ediff-empty-overlay-p (overl)
+ (= (ediff-overlay-start overl) (ediff-overlay-end overl)))
+
+;; like overlay-buffer in Emacs. In XEmacs, returns nil if the extent is
+;; dead. Otherwise, works like extent-buffer
+(defun ediff-overlay-buffer (overl)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (and (extent-live-p overl) (extent-object overl)) ; xemacs form
+ (overlay-buffer overl) ; emacs form
+ ))
+
+;; like overlay-get in Emacs. In XEmacs, returns nil if the extent is
+;; dead. Otherwise, like extent-property
+(defun ediff-overlay-get (overl property)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (and (extent-live-p overl) (extent-property overl property)) ; xemacs form
+ (overlay-get overl property) ; emacs form
+ ))
+
+
+;; These two functions are here because XEmacs refuses to
+;; handle overlays whose buffers were deleted.
+(defun ediff-move-overlay (overlay beg end &optional buffer)
+ "Calls `move-overlay' in Emacs and `set-extent-endpoints' in Lemacs.
+Checks if overlay's buffer exists before actually doing the move."
+ (let ((buf (and overlay (ediff-overlay-buffer overlay))))
+ (if (ediff-buffer-live-p buf)
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (set-extent-endpoints overlay beg end) ; xemacs form
+ (move-overlay overlay beg end buffer) ; emacs form
+ )
+ ;; buffer's dead
+ (if overlay
+ (ediff-delete-overlay overlay)))))
+
+(defun ediff-overlay-put (overlay prop value)
+ "Calls `overlay-put' or `set-extent-property' depending on Emacs version.
+Checks if overlay's buffer exists."
+ (if (ediff-buffer-live-p (ediff-overlay-buffer overlay))
+ (ediff-cond-compile-for-xemacs-or-emacs
+ (set-extent-property overlay prop value) ; xemacs form
+ (overlay-put overlay prop value) ; emacs form
+ )
+ (ediff-delete-overlay overlay)))
+
+;; temporarily uses DIR to abbreviate file name
+;; if DIR is nil, use default-directory
+(defun ediff-abbreviate-file-name (file &optional dir)
+ (cond ((stringp dir)
+ (let ((directory-abbrev-alist (list (cons dir ""))))
+ (abbreviate-file-name file)))
+ (t
+ (ediff-cond-compile-for-xemacs-or-emacs
+ ;; XEmacs requires addl argument
+ (abbreviate-file-name file t) ; xemacs form
+ (abbreviate-file-name file)) ; emacs form
+ )
+ ))
+
+;; Takes a directory and returns the parent directory.
+;; does nothing to `/'. If the ARG is a regular file,
+;; strip the file AND the last dir.
+(defun ediff-strip-last-dir (dir)
+ (if (not (stringp dir)) (setq dir default-directory))
+ (setq dir (expand-file-name dir))
+ (or (file-directory-p dir) (setq dir (file-name-directory dir)))
+ (let* ((pos (1- (length dir)))
+ (last-char (aref dir pos)))
+ (if (and (> pos 0) (= last-char ?/))
+ (setq dir (substring dir 0 pos)))
+ (ediff-abbreviate-file-name (file-name-directory dir))))
+
+(defun ediff-truncate-string-left (str newlen)
+ ;; leave space for ... on the left
+ (let ((len (length str))
+ substr)
+ (if (<= len newlen)
+ str
+ (setq newlen (max 0 (- newlen 3)))
+ (setq substr (substring str (max 0 (- len 1 newlen))))
+ (concat "..." substr))))
+
+(defsubst ediff-nonempty-string-p (string)
+ (and (stringp string) (not (string= string ""))))
+
+(unless (fboundp 'subst-char-in-string)
+ (defun subst-char-in-string (fromchar tochar string &optional inplace)
+ "Replace FROMCHAR with TOCHAR in STRING each time it occurs.
+Unless optional argument INPLACE is non-nil, return a new string."
+ (let ((i (length string))
+ (newstr (if inplace string (copy-sequence string))))
+ (while (> i 0)
+ (setq i (1- i))
+ (if (eq (aref newstr i) fromchar)
+ (aset newstr i tochar)))
+ newstr)))
+
+(defun ediff-abbrev-jobname (jobname)
+ (cond ((eq jobname 'ediff-directories)
+ "Compare two directories")
+ ((eq jobname 'ediff-files)
+ "Compare two files")
+ ((eq jobname 'ediff-buffers)
+ "Compare two buffers")
+ ((eq jobname 'ediff-directories3)
+ "Compare three directories")
+ ((eq jobname 'ediff-files3)
+ "Compare three files")
+ ((eq jobname 'ediff-buffers3)
+ "Compare three buffers")
+ ((eq jobname 'ediff-revision)
+ "Compare file with a version")
+ ((eq jobname 'ediff-directory-revisions)
+ "Compare dir files with versions")
+ ((eq jobname 'ediff-merge-directory-revisions)
+ "Merge dir files with versions")
+ ((eq jobname 'ediff-merge-directory-revisions-with-ancestor)
+ "Merge dir versions via ancestors")
+ (t
+ (capitalize
+ (subst-char-in-string ?- ?\ (substring (symbol-name jobname) 6))))
+ ))
+
+
+;; If ediff modified mode line, strip the modification
+(defsubst ediff-strip-mode-line-format ()
+ (if (member (car mode-line-format) '(" A: " " B: " " C: " " Ancestor: "))
+ (setq mode-line-format (nth 2 mode-line-format))))
+
+;; Verify that we have a difference selected.
+(defsubst ediff-valid-difference-p (&optional n)
+ (or n (setq n ediff-current-difference))
+ (and (>= n 0) (< n ediff-number-of-differences)))
+
+(defsubst ediff-show-all-diffs (n)
+ "Don't skip difference regions."
+ nil)
+
+(defsubst Xor (a b)
+ (or (and a (not b)) (and (not a) b)))
+
+(defsubst ediff-message-if-verbose (string &rest args)
+ (if ediff-verbose-p
+ (apply 'message string args)))
+
+(defun ediff-file-attributes (filename attr-number)
+ (if (ediff-listable-file filename)
+ (nth attr-number (file-attributes filename))
+ -1)
+ )
+
+(defsubst ediff-file-size (filename)
+ (ediff-file-attributes filename 7))
+(defsubst ediff-file-modtime (filename)
+ (ediff-file-attributes filename 5))
+
+
+(defun ediff-convert-standard-filename (fname)
+ (if (fboundp 'convert-standard-filename)
+ (convert-standard-filename fname)
+ fname))
+
+
+(if (fboundp 'with-syntax-table)
+ (defalias 'ediff-with-syntax-table 'with-syntax-table)
+ ;; stolen from subr.el in emacs 21
+ (defmacro ediff-with-syntax-table (table &rest body)
+ (let ((old-table (make-symbol "table"))
+ (old-buffer (make-symbol "buffer")))
+ `(let ((,old-table (syntax-table))
+ (,old-buffer (current-buffer)))
+ (unwind-protect
+ (progn
+ (set-syntax-table (copy-syntax-table ,table))
+ ,@body)
+ (save-current-buffer
+ (set-buffer ,old-buffer)
+ (set-syntax-table ,old-table)))))))
+
+
+
+;;; 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:
+
+(provide 'ediff-init)
+
+;;; arch-tag: fa31d384-1e70-4d4b-82a7-3e96307c46f5
+;;; ediff-init.el ends here
HCoop / bpt / emacs.git / blobdiff