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emacs/lisp/ediff-help.el

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;;; ediff-help.el --- Code related to the contents of Ediff help buffers
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;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
;; 2004, 2005 Free Software Foundation, Inc.
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2002-01-07 Michael Kifer <kifer@cs.stonybrook.edu> * viper-init.el (viper-cond-compile-for-xemacs-or-emacs): new macro that replaces viper-emacs-p and viper-xemacs-p in many cases. Used to reduce the number of warnings. * viper-cmd.el: use viper-cond-compile-for-xemacs-or-emacs. (viper-standard-value): moved here from viper.el. (viper-set-unread-command-events): moved to viper-util.el (viper-check-minibuffer-overlay): make sure viper-minibuffer-overlay is moved to cover the entire input field. * viper-util.el: use viper-cond-compile-for-xemacs-or-emacs. (viper-read-key-sequence, viper-set-unread-command-events, viper-char-symbol-sequence-p, viper-char-array-p): moved here. * viper-ex.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-keym.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-mous.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-macs.el (viper-char-array-p, viper-char-symbol-sequence-p, viper-event-vector-p): moved to viper-util.el * viper.el (viper-standard-value): moved to viper-cmd.el. Use viper-cond-compile-for-xemacs-or-emacs. * ediff-help.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-hook.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-init.el (ediff-cond-compile-for-xemacs-or-emacs): new macro designed to be used in many places where ediff-emacs-p or ediff-xemacs-p was previously used. Reduces the number of warnings. Use ediff-cond-compile-for-xemacs-or-emacs in many places in lieue of ediff-xemacs-p. (ediff-make-current-diff-overlay, ediff-highlight-diff-in-one-buffer, ediff-convert-fine-diffs-to-overlays, ediff-empty-diff-region-p, ediff-whitespace-diff-region-p, ediff-get-region-contents): moved to ediff-util.el. (ediff-event-key): moved here. * ediff-merge.el: got rid of unreferenced variables. * ediff-mult.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-util.el: use ediff-cond-compile-for-xemacs-or-emacs. (ediff-cleanup-mess): improved the way windows are set up after quitting ediff. (ediff-janitor): use ediff-dispose-of-variant-according-to-user. (ediff-dispose-of-variant-according-to-user): new function designed to be smarter and also understands indirect buffers. (ediff-highlight-diff-in-one-buffer, ediff-unhighlight-diff-in-one-buffer, ediff-unhighlight-diffs-totally-in-one-buffer, ediff-highlight-diff, ediff-highlight-diff, ediff-unhighlight-diff, ediff-unhighlight-diffs-totally, ediff-empty-diff-region-p, ediff-whitespace-diff-region-p, ediff-get-region-contents, ediff-make-current-diff-overlay): moved here. (ediff-format-bindings-of): new function by Hannu Koivisto <azure@iki.fi>. (ediff-setup): make sure the merge buffer is always widened and modifiable. (ediff-write-merge-buffer-and-maybe-kill): refuse to write the result of a merge into a file visited by another buffer. (ediff-arrange-autosave-in-merge-jobs): check if the merge file is visited by another buffer and ask to save/delete that buffer. (ediff-verify-file-merge-buffer): new function to do the above. * ediff-vers.el: load ediff-init.el at compile time. * ediff-wind.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff.el (ediff-windows, ediff-regions-wordwise, ediff-regions-linewise): use indirect buffers to improve robustness and make it possible to compare regions of the same buffer (even overlapping regions). (ediff-clone-buffer-for-region-comparison, ediff-clone-buffer-for-window-comparison): new functions. (ediff-files-internal): refuse to compare identical files. (ediff-regions-internal): get rid of the warning about comparing regions of the same buffer. * ediff-diff.el (ediff-convert-fine-diffs-to-overlays): moved here. Plus the following fixes courtesy of Dave Love: Doc fixes. (ediff-word-1): Use word class and move - to the front per regexp documentation. (ediff-wordify): Bind forward-word-function outside loop. (ediff-copy-to-buffer): Use insert-buffer-substring rather than consing buffer contents. (ediff-goto-word): Move syntax table setting outside loop.
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;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
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;; 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
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;;; Code:
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(provide 'ediff-help)
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;; Compiler pacifier start
(defvar ediff-multiframe)
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(eval-when-compile
(let ((load-path (cons (expand-file-name ".") load-path)))
(or (featurep 'ediff-init)
(load "ediff-init.el" nil nil 'nosuffix))
))
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;; end pacifier
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(require 'ediff-init)
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;; Help messages
(defconst ediff-long-help-message-head
" Move around | Toggle features | Manipulate
=====================|===========================|============================="
"The head of the full help message.")
(defconst ediff-long-help-message-tail
"=====================|===========================|=============================
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R -show registry | = -compare regions | M -show session group
D -diff output | E -browse Ediff manual| G -send bug report
i -status info | ? -help off | z/q -suspend/quit
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-------------------------------------------------------------------------------
For help on a specific command: Click Button 2 over it; or
Put the cursor over it and type RET."
"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 -hilighting | rx -restore buf X's old diff
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j -jump to diff | @ -auto-refinement | * -refine current region
gx -goto X's point| | ! -update diff regions
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C-l -recenter | ## -ignore whitespace |
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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
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~ -rotate buffers| m -wide display |
"
"Help message usually used for 3-way comparison.
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Normally, not a user option. See `ediff-help-message' for details.")
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(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 -hilighting | rx -restore buf X's old diff
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j -jump to diff | @ -auto-refinement | * -refine current region
gx -goto X's point| | ! -update diff regions
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C-l -recenter | ## -ignore whitespace |
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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
~ -swap variants | m -wide display |
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"
"Help message usually used for 2-way comparison.
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Normally, not a user option. See `ediff-help-message' for details.")
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(defconst ediff-long-help-message-narrow2
"
p,DEL -previous diff | | -vert/horiz split |a/b -copy A/B's region to B/A
n,SPC -next diff | h -hilighting | rx -restore buf X's old diff
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j -jump to diff | @ -auto-refinement | * -refine current region
gx -goto X's point| % -narrow/widen buffs | ! -update diff regions
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C-l -recenter | ## -ignore whitespace |
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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
~ -swap variants | m -wide display |
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"
"Help message when comparing windows or regions line-by-line.
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Normally, not a user option. See `ediff-help-message' for details.")
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(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 -hilighting | rx -restore buf X's old diff
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j -jump to diff | |
gx -goto X's point| % -narrow/widen buffs | ! -recompute diffs
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C-l -recenter | |
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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
~ -swap variants | m -wide display |
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"
"Help message when comparing windows or regions word-by-word.
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Normally, not a user option. See `ediff-help-message' for details.")
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(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 -hilighting | r -restore buf C's old diff
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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
~ -swap variants | s -shrink window C | / -show ancestor buff
| $$ -show clashes only | & -merge w/new default
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| $* -skip changed regions |
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"
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"Help message for merge sessions.
Normally, not a user option. See `ediff-help-message' for details.")
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;; The actual long help message.
(ediff-defvar-local ediff-long-help-message ""
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"Normally, not a user option. See `ediff-help-message' for details.")
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(defconst ediff-brief-message-string
" Type ? for help"
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"Contents of the brief help message.")
;; The actual brief help message
(ediff-defvar-local ediff-brief-help-message ""
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"Normally, not a user option. See `ediff-help-message' for details.")
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(ediff-defvar-local ediff-brief-help-message-function 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
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produce the brief help message. This function must return a string.")
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(ediff-defvar-local ediff-long-help-message-function nil
"The long help message that the user can customize.
See `ediff-brief-help-message-function' for more.")
(defcustom ediff-use-long-help-message nil
"*If t, Ediff displays a long help message. Short help message otherwise."
:type 'boolean
:group 'ediff-window)
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;; The actual help message.
(ediff-defvar-local ediff-help-message ""
"The actual help message.
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Normally, the user shouldn't touch this. However, if you want Ediff to
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start up with different help messages for different jobs, you can change
the value of this variable and the variables `ediff-help-message-*' in
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`ediff-startup-hook'.")
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;; the keymap that defines clicks over the quick help regions
(defvar ediff-help-region-map (make-sparse-keymap))
(define-key
ediff-help-region-map
(if ediff-emacs-p [mouse-2] [button2])
'ediff-help-for-quick-help)
;; runs in the control buffer
(defun ediff-set-help-overlays ()
(goto-char (point-min))
(let (overl beg end cmd)
(while (re-search-forward " *\\([^ \t\n|]+\\||\\) +-[^|\n]+" nil 'noerror)
(setq beg (match-beginning 0)
end (match-end 0)
cmd (buffer-substring (match-beginning 1) (match-end 1)))
(setq overl (ediff-make-overlay beg end))
(if ediff-emacs-p
(ediff-overlay-put overl 'mouse-face 'highlight)
(ediff-overlay-put overl 'highlight t))
(ediff-overlay-put overl 'ediff-help-info cmd))))
(defun ediff-help-for-quick-help ()
"Explain Ediff commands in more detail."
(interactive)
(ediff-barf-if-not-control-buffer)
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(let ((pos (ediff-event-point last-command-event))
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overl cmd)
2002-01-07 Michael Kifer <kifer@cs.stonybrook.edu> * viper-init.el (viper-cond-compile-for-xemacs-or-emacs): new macro that replaces viper-emacs-p and viper-xemacs-p in many cases. Used to reduce the number of warnings. * viper-cmd.el: use viper-cond-compile-for-xemacs-or-emacs. (viper-standard-value): moved here from viper.el. (viper-set-unread-command-events): moved to viper-util.el (viper-check-minibuffer-overlay): make sure viper-minibuffer-overlay is moved to cover the entire input field. * viper-util.el: use viper-cond-compile-for-xemacs-or-emacs. (viper-read-key-sequence, viper-set-unread-command-events, viper-char-symbol-sequence-p, viper-char-array-p): moved here. * viper-ex.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-keym.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-mous.el: use viper-cond-compile-for-xemacs-or-emacs. * viper-macs.el (viper-char-array-p, viper-char-symbol-sequence-p, viper-event-vector-p): moved to viper-util.el * viper.el (viper-standard-value): moved to viper-cmd.el. Use viper-cond-compile-for-xemacs-or-emacs. * ediff-help.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-hook.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-init.el (ediff-cond-compile-for-xemacs-or-emacs): new macro designed to be used in many places where ediff-emacs-p or ediff-xemacs-p was previously used. Reduces the number of warnings. Use ediff-cond-compile-for-xemacs-or-emacs in many places in lieue of ediff-xemacs-p. (ediff-make-current-diff-overlay, ediff-highlight-diff-in-one-buffer, ediff-convert-fine-diffs-to-overlays, ediff-empty-diff-region-p, ediff-whitespace-diff-region-p, ediff-get-region-contents): moved to ediff-util.el. (ediff-event-key): moved here. * ediff-merge.el: got rid of unreferenced variables. * ediff-mult.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff-util.el: use ediff-cond-compile-for-xemacs-or-emacs. (ediff-cleanup-mess): improved the way windows are set up after quitting ediff. (ediff-janitor): use ediff-dispose-of-variant-according-to-user. (ediff-dispose-of-variant-according-to-user): new function designed to be smarter and also understands indirect buffers. (ediff-highlight-diff-in-one-buffer, ediff-unhighlight-diff-in-one-buffer, ediff-unhighlight-diffs-totally-in-one-buffer, ediff-highlight-diff, ediff-highlight-diff, ediff-unhighlight-diff, ediff-unhighlight-diffs-totally, ediff-empty-diff-region-p, ediff-whitespace-diff-region-p, ediff-get-region-contents, ediff-make-current-diff-overlay): moved here. (ediff-format-bindings-of): new function by Hannu Koivisto <azure@iki.fi>. (ediff-setup): make sure the merge buffer is always widened and modifiable. (ediff-write-merge-buffer-and-maybe-kill): refuse to write the result of a merge into a file visited by another buffer. (ediff-arrange-autosave-in-merge-jobs): check if the merge file is visited by another buffer and ask to save/delete that buffer. (ediff-verify-file-merge-buffer): new function to do the above. * ediff-vers.el: load ediff-init.el at compile time. * ediff-wind.el: use ediff-cond-compile-for-xemacs-or-emacs. * ediff.el (ediff-windows, ediff-regions-wordwise, ediff-regions-linewise): use indirect buffers to improve robustness and make it possible to compare regions of the same buffer (even overlapping regions). (ediff-clone-buffer-for-region-comparison, ediff-clone-buffer-for-window-comparison): new functions. (ediff-files-internal): refuse to compare identical files. (ediff-regions-internal): get rid of the warning about comparing regions of the same buffer. * ediff-diff.el (ediff-convert-fine-diffs-to-overlays): moved here. Plus the following fixes courtesy of Dave Love: Doc fixes. (ediff-word-1): Use word class and move - to the front per regexp documentation. (ediff-wordify): Bind forward-word-function outside loop. (ediff-copy-to-buffer): Use insert-buffer-substring rather than consing buffer contents. (ediff-goto-word): Move syntax table setting outside loop.
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(ediff-cond-compile-for-xemacs-or-emacs
;; xemacs
(setq overl (extent-at pos (current-buffer) 'ediff-help-info)
cmd (ediff-overlay-get overl 'ediff-help-info))
;; emacs
(setq cmd (car (mapcar (lambda (elt)
(overlay-get elt 'ediff-help-info))
(overlays-at pos))))
)
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(if (not (stringp cmd))
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(error "Hmm... I don't see an Ediff command around here..."))
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(ediff-documentation "Quick Help Commands")
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(let (case-fold-search)
(cond ((string= cmd "?") (re-search-forward "^`\\?'"))
((string= cmd "G") (re-search-forward "^`G'"))
((string= cmd "E") (re-search-forward "^`E'"))
((string= cmd "wd") (re-search-forward "^`wd'"))
((string= cmd "wx") (re-search-forward "^`wa'"))
((string= cmd "a/b") (re-search-forward "^`a'"))
((string= cmd "x") (re-search-forward "^`a'"))
((string= cmd "xy") (re-search-forward "^`ab'"))
((string= cmd "p,DEL") (re-search-forward "^`p'"))
((string= cmd "n,SPC") (re-search-forward "^`n'"))
((string= cmd "j") (re-search-forward "^`j'"))
((string= cmd "gx") (re-search-forward "^`ga'"))
((string= cmd "!") (re-search-forward "^`!'"))
((string= cmd "*") (re-search-forward "^`\\*'"))
((string= cmd "m") (re-search-forward "^`m'"))
((string= cmd "|") (re-search-forward "^`|'"))
((string= cmd "@") (re-search-forward "^`@'"))
((string= cmd "h") (re-search-forward "^`h'"))
((string= cmd "r") (re-search-forward "^`r'"))
((string= cmd "rx") (re-search-forward "^`ra'"))
((string= cmd "##") (re-search-forward "^`##'"))
((string= cmd "#f/#h") (re-search-forward "^`#f'"))
((string= cmd "X") (re-search-forward "^`A'"))
((string= cmd "v/V") (re-search-forward "^`v'"))
((string= cmd "</>") (re-search-forward "^`<'"))
((string= cmd "~") (re-search-forward "^`~'"))
((string= cmd "i") (re-search-forward "^`i'"))
((string= cmd "D") (re-search-forward "^`D'"))
((string= cmd "R") (re-search-forward "^`R'"))
((string= cmd "M") (re-search-forward "^`M'"))
((string= cmd "z/q") (re-search-forward "^`z'"))
((string= cmd "%") (re-search-forward "^`%'"))
((string= cmd "C-l") (re-search-forward "^`C-l'"))
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((string= cmd "$$") (re-search-forward "^`\\$\\$'"))
((string= cmd "$*") (re-search-forward "^`\\$\\*'"))
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((string= cmd "/") (re-search-forward "^`/'"))
((string= cmd "&") (re-search-forward "^`&'"))
((string= cmd "s") (re-search-forward "^`s'"))
((string= cmd "+") (re-search-forward "^`\\+'"))
((string= cmd "=") (re-search-forward "^`='"))
(t (error "Undocumented command! Type `G' in Ediff Control Panel to drop a note to the Ediff maintainer")))
) ; let case-fold-search
))
;; assuming we are in control window, calculate length of the first line in
;; help message
(defun ediff-help-message-line-length ()
(save-excursion
(goto-char (point-min))
(if ediff-use-long-help-message
(next-line 1))
(end-of-line)
(current-column)))
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(defun ediff-indent-help-message ()
(let* ((shift (/ (max 0 (- (window-width (selected-window))
(ediff-help-message-line-length)))
2))
(str (make-string shift ?\ )))
(save-excursion
(goto-char (point-min))
(while (< (point) (point-max))
(insert str)
(beginning-of-line)
(forward-line 1)))))
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;; compose the help message as a string
(defun ediff-set-help-message ()
(setq ediff-long-help-message
(cond ((and ediff-long-help-message-function
(or (symbolp ediff-long-help-message-function)
(consp ediff-long-help-message-function)))
(funcall ediff-long-help-message-function))
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(ediff-word-mode
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(concat ediff-long-help-message-head
ediff-long-help-message-word-mode
ediff-long-help-message-tail))
(ediff-narrow-job
(concat ediff-long-help-message-head
ediff-long-help-message-narrow2
ediff-long-help-message-tail))
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(ediff-merge-job
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(concat ediff-long-help-message-head
ediff-long-help-message-merge
ediff-long-help-message-tail))
(ediff-diff3-job
(concat ediff-long-help-message-head
ediff-long-help-message-compare3
ediff-long-help-message-tail))
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(t
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(concat ediff-long-help-message-head
ediff-long-help-message-compare2
ediff-long-help-message-tail))))
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(setq ediff-brief-help-message
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(cond ((and ediff-brief-help-message-function
(or (symbolp ediff-brief-help-message-function)
(consp ediff-brief-help-message-function)))
(funcall ediff-brief-help-message-function))
((stringp ediff-brief-help-message-function)
ediff-brief-help-message-function)
((ediff-multiframe-setup-p) ediff-brief-message-string)
(t ; long brief msg, not multiframe --- put in the middle
ediff-brief-message-string)
))
(setq ediff-help-message (if ediff-use-long-help-message
ediff-long-help-message
ediff-brief-help-message))
(run-hooks 'ediff-display-help-hook))
;;;###autoload
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(defun ediff-customize ()
(interactive)
(customize-group "ediff"))
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;;; arch-tag: 05659813-7fcf-4274-964f-d2f577431a9d
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;;; ediff-help.el ends here