reftex / reftex-sel.el

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;;; reftex-sel.el - The selection modes for RefTeX
;; Copyright (c) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.

;; Author:     Carsten Dominik <dominik@strw.LeidenUniv.nl>
;; Version: 4.14
;;

;; 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.

(eval-when-compile (require 'cl))
(provide 'reftex-sel)
(require 'reftex)
;;;

(defvar reftex-select-label-map nil
  "Keymap used for *RefTeX Select* buffer, when selecting a label.
This keymap can be used to configure the label selection process which is
started with the command \\[reftex-reference].")

(defun reftex-select-label-mode ()
  "Major mode for selecting a label in a LaTeX document.
This buffer was created with RefTeX.
It only has a meaningful keymap when you are in the middle of a 
selection process.
To select a label, move the cursor to it and press RET.
Press `?' for a summary of important key bindings.

During a selection process, these are the local bindings.

\\{reftex-select-label-map}"

  (interactive)
  (kill-all-local-variables)
  (make-local-hook 'pre-command-hook)
  (make-local-hook 'post-command-hook)
  (setq major-mode 'reftex-select-label-mode
	mode-name "LSelect")
  (set (make-local-variable 'reftex-select-marked) nil)
  (when (syntax-table-p reftex-latex-syntax-table)
    (set-syntax-table reftex-latex-syntax-table))
  ;; We do not set a local map - reftex-select-item does this.
  (run-hooks 'reftex-select-label-mode-hook))

(defvar reftex-select-bib-map nil
  "Keymap used for *RefTeX Select* buffer, when selecting a BibTeX entry.
This keymap can be used to configure the BibTeX selection process which is
started with the command \\[reftex-citation].")

(defun reftex-select-bib-mode ()
  "Major mode for selecting a citation key in a LaTeX document.
This buffer was created with RefTeX.
It only has a meaningful keymap when you are in the middle of a 
selection process.
In order to select a citation, move the cursor to it and press RET.
Press `?' for a summary of important key bindings.

During a selection process, these are the local bindings.

\\{reftex-select-label-map}"
  (interactive)
  (kill-all-local-variables)
  (make-local-hook 'pre-command-hook)
  (make-local-hook 'post-command-hook)
  (setq major-mode 'reftex-select-bib-mode
	mode-name "BSelect")
  (set (make-local-variable 'reftex-select-marked) nil)
  ;; We do not set a local map - reftex-select-item does this.
  (run-hooks 'reftex-select-bib-mode-hook))

(defun reftex-get-offset (buf here-am-I &optional typekey toc index file)
  ;; Find the correct offset data, like insert-docstruct would, but faster.
  ;; Buffer BUF knows the correct docstruct to use.
  ;; Basically this finds the first docstruct entry after HERE-I-AM which
  ;; is of allowed type.  The optional arguments specify what is allowed.
  (catch 'exit
    (save-excursion
      (set-buffer buf)
      (reftex-access-scan-info)
      (let* ((rest (memq here-am-I (symbol-value reftex-docstruct-symbol)))
	     entry)
	(while (setq entry (pop rest))
	  (if (or (and typekey
		       (stringp (car entry))
		       (or (equal typekey " ")
			   (equal typekey (nth 1 entry))))
		  (and toc (eq (car entry) 'toc))
		  (and index (eq (car entry) 'index))
		  (and file
		       (memq (car entry) '(bof eof file-error))))
	      (throw 'exit entry)))
	nil))))

(defun reftex-insert-docstruct
  (buf toc labels index-entries files context counter show-commented
	    here-I-am xr-prefix toc-buffer)
  ;; Insert an excerpt of the docstruct list.
  ;; Return the data property of the entry corresponding to HERE-I-AM.
  ;; BUF is the buffer which has the correct docstruct-symbol.
  ;; LABELS non-nil means to include labels into the list.
  ;;        When a string, indicates the label type to include
  ;; FILES non-nil menas to display file boundaries.
  ;; CONTEXT non-nil means to include label context.
  ;; COUNTER means to count the labels.
  ;; SHOW-COMMENTED means to include also labels which are commented out.
  ;; HERE-I-AM is a member of the docstruct list.  The function will return
  ;;           a used member near to this one, as a possible starting point.
  ;; XR-PREFIX is the prefix to put in front of labels.
  ;; TOC-BUFFER means this is to fill the toc buffer.
  (let* ((font (reftex-use-fonts))
         (cnt 0)
         (index -1)
         (toc-indent " ")
         (label-indent
          (concat "> "
                  (if toc (make-string (* 7 reftex-level-indent) ?\ ) "")))
         (context-indent
          (concat ".   "
                  (if toc (make-string (* 7 reftex-level-indent) ?\ ) "")))
	 (mouse-face
	  (if (memq reftex-highlight-selection '(mouse both))
	      reftex-mouse-selected-face
	    nil))
	 (label-face (reftex-verified-face reftex-label-face
					   'font-lock-constant-face
					   'font-lock-reference-face))
	 (index-face (reftex-verified-face reftex-index-face
					   'font-lock-constant-face
					   'font-lock-reference-face))
         all cell text label typekey note comment master-dir-re
         offset from to index-tag docstruct-symbol)

    ;; Pop to buffer buf to get the correct buffer-local variables
    (save-excursion
      (set-buffer buf)

      ;; Ensure access to scanning info
      (reftex-access-scan-info)

      (setq docstruct-symbol reftex-docstruct-symbol
	    all (symbol-value reftex-docstruct-symbol)
            reftex-active-toc nil
            master-dir-re
            (concat "\\`" (regexp-quote
                           (file-name-directory (reftex-TeX-master-file))))))

    (set (make-local-variable 'reftex-docstruct-symbol) docstruct-symbol)
    (set (make-local-variable 'reftex-prefix)
	 (cdr (assoc labels reftex-typekey-to-prefix-alist)))
    (if (equal reftex-prefix " ") (setq reftex-prefix nil))

    ;; Walk the docstruct and insert the appropriate stuff
    (while (setq cell (pop all))

      (incf index)
      (setq from (point))

      (if (eq cell here-I-am) (setq offset 'attention))

      (cond

       ((memq (car cell) '(bib thebib label-numbers appendix
			       master-dir bibview-cache is-multi xr xr-doc)))
       ;; These are currently ignored

       ((memq (car cell) '(bof eof file-error))
        ;; Beginning or end of a file
        (when files
	  (if (eq offset 'attention) (setq offset cell))
          (insert
           " File " (if (string-match master-dir-re (nth 1 cell))
                   (substring (nth 1 cell) (match-end 0))
                 (nth 1 cell))
           (cond ((eq (car cell) 'bof) " starts here\n")
                 ((eq (car cell) 'eof) " ends here\n")
                 ((eq (car cell) 'file-error) " was not found\n")))
	  (setq to (point))
          (when font
            (put-text-property from to
                               'face reftex-file-boundary-face))
	  (when toc-buffer
	    (if mouse-face
		(put-text-property from (1- to)
				   'mouse-face mouse-face))
	    (put-text-property from to :data cell))))

       ((eq (car cell) 'toc)
        ;; a table of contents entry
        (when (and toc
		   (<= (nth 5 cell) reftex-toc-max-level))
	  (if (eq offset 'attention) (setq offset cell))
          (setq reftex-active-toc cell)
          (insert (concat toc-indent (nth 2 cell) "\n"))
	  (setq to (point))
	  (when font
	    (put-text-property from to
			       'face reftex-section-heading-face))
	  (when toc-buffer
	    (if mouse-face
		(put-text-property from (1- to)
				   'mouse-face mouse-face))
	    (put-text-property from to :data cell))
	  (goto-char to)))

       ((stringp (car cell))
        ;; a label
        (when (null (nth 2 cell))
          ;; No context yet.  Quick update.
	  (setcdr cell (cdr (reftex-label-info-update cell)))
	  (put docstruct-symbol 'modified t))

        (setq label   (car cell)
              typekey (nth 1 cell)
              text    (nth 2 cell)
              comment (nth 4 cell)
              note    (nth 5 cell))

        (when (and labels
		   (or (eq labels t) 
		       (string= typekey labels)
		       (string= labels " "))
                   (or show-commented (null comment)))

          ;; Yes we want this one
          (incf cnt)
	  (if (eq offset 'attention) (setq offset cell))

	  (setq label (concat xr-prefix label))
          (when comment (setq label (concat "% " label)))
          (insert label-indent label)
          (when font
	    (setq to (point))
            (put-text-property
             (- (point) (length label)) to
             'face (if comment
                       'font-lock-comment-face
                     label-face))
	    (goto-char to))

          (insert (if counter (format " (%d) " cnt) "")
                  (if comment " LABEL IS COMMENTED OUT " "")
                  (if (stringp note) (concat "  " note) "")
                  "\n")
          (setq to (point))

          (when context
            (insert context-indent text "\n")
            (setq to (point)))
          (put-text-property from to :data cell)
	  (when mouse-face
	    (put-text-property from (1- to)
			       'mouse-face mouse-face))	  
          (goto-char to)))

       ((eq (car cell) 'index)
	;; index entry
	(when (and index-entries
		   (or (eq t index-entries)
		       (string= index-entries (nth 1 cell))))
	  (if (eq offset 'attention) (setq offset cell))
	  (setq index-tag (format "<%s>" (nth 1 cell)))
	  (and font
	       (put-text-property 0 (length index-tag)
				  'face reftex-index-tag-face index-tag))
	  (insert label-indent index-tag " " (nth 7 cell))

	  (when font
	    (setq to (point))
	    (put-text-property 
	     (- (point) (length (nth 7 cell))) to
	     'face index-face)
	    (goto-char to))
	  (insert "\n")
	  (setq to (point))

	  (when context
	    (insert context-indent (nth 2 cell) "\n")
	    (setq to (point)))
	  (put-text-property from to :data cell)
	  (when mouse-face
	    (put-text-property from (1- to)
			       'mouse-face mouse-face))	  
          (goto-char to)))))

    (when (reftex-refontify)
      ;; we need to fontify the buffer
      (reftex-fontify-select-label-buffer buf))
    (run-hooks 'reftex-display-copied-context-hook)
    offset))

(defun reftex-find-start-point (fallback &rest locations)
  ;; Set point to the first available LOCATION.  When a LOCATION is a list,
  ;; search for such a :data text property.  When it is an integer,
  ;; use is as line number.  FALLBACK is a buffer position used if everything
  ;; else  fails.
  (catch 'exit
    (goto-char (point-min))
    (let (loc pos)
      (while locations
	(setq loc (pop locations))
	(cond
	 ((null loc))
	 ((listp loc)
	  (setq pos (text-property-any (point-min) (point-max) :data loc))
	  (when pos
	    (goto-char pos) 
	    (throw 'exit t)))
	 ((integerp loc)
	  (when (<= loc (count-lines (point-min) (point-max)))
	    (goto-line loc)
	    (throw 'exit t)))))
      (goto-char fallback))))

(defvar reftex-last-data nil)
(defvar reftex-last-line nil)
(defvar reftex-select-marked nil)

(defun reftex-select-item (prompt help-string keymap
				  &optional offset
				  call-back cb-flag)
;; Select an item, using PROMPT. The function returns a key indicating
;; an exit status, along with a data structure indicating which item was
;; selected.
;; HELP-STRING contains help.  KEYMAP is a keymap with the available
;; selection commands.
;; OFFSET can be a label list item which will be selected at start.
;; When it is t, point will start out at the beginning of the buffer.
;; Any other value will cause restart where last selection left off.
;; When CALL-BACK is given, it is a function which is called with the index
;; of the element.
;; CB-FLAG is the initial value of that flag.

  (let* (ev data last-data (selection-buffer (current-buffer)))

    (setq reftex-select-marked nil)

    (setq ev
          (catch 'myexit
            (save-window-excursion
              (setq truncate-lines t)

	      ;; Find a good starting point
	      (reftex-find-start-point 
	       (point-min) offset reftex-last-data reftex-last-line)
              (beginning-of-line 1)
	      (set (make-local-variable 'reftex-last-follow-point) (point))

      (unwind-protect
	  (progn
	    (use-local-map keymap)
	    (add-hook 'pre-command-hook 'reftex-select-pre-command-hook nil t)
	    (add-hook 'post-command-hook 'reftex-select-post-command-hook nil t)
	    (princ prompt)
	    (set-marker reftex-recursive-edit-marker (point))
	    ;; XEmacs does not run post-command-hook here
	    (and (featurep 'xemacs) (run-hooks 'post-command-hook))
	    (recursive-edit))

	(set-marker reftex-recursive-edit-marker nil)
	(save-excursion
	  (set-buffer selection-buffer)
	  (use-local-map nil)
	  (remove-hook 'pre-command-hook 'reftex-select-pre-command-hook t)
	  (remove-hook 'post-command-hook 
		       'reftex-select-post-command-hook t))
	;; Kill the mark overlays
	(mapcar (lambda (c) (delete-overlay (nth 1 c)))
		reftex-select-marked)))))

    (set (make-local-variable 'reftex-last-line)
	 (+ (count-lines (point-min) (point)) (if (bolp) 1 0)))
    (set (make-local-variable 'reftex-last-data) last-data)
    (reftex-kill-buffer "*RefTeX Help*")
    (setq reftex-callback-fwd (not reftex-callback-fwd)) ;; ;-)))
    (message "")
    (list ev data last-data)))

;; The following variables are all bound dynamically in `reftex-select-item'.
;; The defvars are here only to silence the byte compiler.

(defvar found-list)
(defvar cb-flag)
(defvar data)
(defvar prompt)
(defvar last-data)
(defvar call-back)
(defvar help-string)
(defvar refstyle)

;; The selection commands

(defun reftex-select-pre-command-hook ()
  (reftex-unhighlight 1)
  (reftex-unhighlight 0))

(defun reftex-select-post-command-hook ()
  (let (b e)
    (setq data (get-text-property (point) :data))
    (setq last-data (or data last-data))
  
    (when (and data cb-flag
	       (not (equal reftex-last-follow-point (point))))
      (setq reftex-last-follow-point (point))
      (funcall call-back data reftex-callback-fwd 
	       (not reftex-revisit-to-follow)))
    (if data
	(setq b (or (previous-single-property-change
		     (1+ (point)) :data)
		    (point-min))
	      e (or (next-single-property-change
		     (point) :data)
		    (point-max)))
      (setq b (point) e (point)))
    (and (memq reftex-highlight-selection '(cursor both))
	 (reftex-highlight 1 b e))
    (if (or (not (pos-visible-in-window-p b))
	    (not (pos-visible-in-window-p e)))
	(recenter '(4)))
    (unless (current-message)
      (princ prompt))))

(defun reftex-select-next (&optional arg)
  "Move to next selectable item."
  (interactive "p")
  (setq reftex-callback-fwd t)
  (or (eobp) (forward-char 1))
  (re-search-forward "^[^. \t\n\r]" nil t arg)
  (beginning-of-line 1))
(defun reftex-select-previous (&optional arg)
  "Move to previous selectable item."
  (interactive "p")
  (setq reftex-callback-fwd nil)
  (re-search-backward "^[^. \t\n\r]" nil t arg))
(defun reftex-select-next-heading (&optional arg)
  "Move to next table of contentes line."
  (interactive "p")
  (end-of-line)
  (re-search-forward "^ " nil t arg)
  (beginning-of-line))
(defun reftex-select-previous-heading (&optional arg)
  "Move to previous table of contentes line."
  (interactive "p")
  (re-search-backward "^ " nil t arg))
(defun reftex-select-quit ()
  "Abort selection process."
  (interactive)
  (throw 'myexit nil))
(defun reftex-select-keyboard-quit ()
  "Abort selection process."
  (interactive)
  (throw 'exit t))
(defun reftex-select-jump-to-previous ()
  "Jump back to where previous selection process left off."
  (interactive)
  (let (pos)
    (cond
     ((and (local-variable-p 'reftex-last-data (current-buffer))
	   reftex-last-data
	   (setq pos (text-property-any (point-min) (point-max)
					:data reftex-last-data)))
      (goto-char pos))
     ((and (local-variable-p 'reftex-last-line (current-buffer))
	   (integerp reftex-last-line))
      (goto-line reftex-last-line))
     (t (ding)))))
(defun reftex-select-toggle-follow ()
  "Toggle follow mode:  Other window follows with full context."
  (interactive)
  (setq reftex-last-follow-point -1)
  (setq cb-flag (not cb-flag)))
(defun reftex-select-toggle-varioref ()
  "Toggle the macro used for referencing the label between \\ref and \\vref."
  (interactive)
  (if (string= refstyle "\\ref")
      (setq refstyle "\\vref")
    (setq refstyle "\\ref"))
  (force-mode-line-update))
(defun reftex-select-toggle-fancyref ()
  "Toggle the macro used for referencing the label between \\ref and \\vref."
  (interactive)
  (setq refstyle
	(cond ((string= refstyle "\\ref") "\\fref")
	      ((string= refstyle "\\fref") "\\Fref")
	      (t "\\ref")))
  (force-mode-line-update))
(defun reftex-select-show-insertion-point ()
  "Show the point from where selection was started in another window."
  (interactive)
  (let ((this-window (selected-window)))
    (unwind-protect
	(progn
	  (switch-to-buffer-other-window
	   (marker-buffer reftex-select-return-marker))
	  (goto-char (marker-position reftex-select-return-marker))
	  (recenter '(4)))
      (select-window this-window))))
(defun reftex-select-callback ()
  "Show full context in another window."
  (interactive)
  (if data (funcall call-back data reftex-callback-fwd nil) (ding)))
(defun reftex-select-accept ()
  "Accept the currently selected item."
  (interactive)
  (throw 'myexit 'return))
(defun reftex-select-mouse-accept (ev)
  "Accept the item at the mouse click."
  (interactive "e")
  (mouse-set-point ev)
  (setq data (get-text-property (point) :data))
  (setq last-data (or data last-data))
  (throw 'myexit 'return))
(defun reftex-select-read-label ()
  "Use minibuffer to read a label to reference, with completion."
  (interactive)
  (let ((label (completing-read 
		"Label: " (symbol-value reftex-docstruct-symbol)
		nil nil reftex-prefix)))
    (unless (or (equal label "") (equal label reftex-prefix))
      (throw 'myexit label))))
(defun reftex-select-read-cite ()
  "Use minibuffer to read a citation key with completion."
  (interactive)
  (let* ((key (completing-read "Citation key: " found-list))
	 (entry (assoc key found-list)))
    (cond
     ((or (null key) (equal key "")))
     (entry
      (setq data entry)
      (setq last-data data)
      (throw 'myexit 'return))
     (t (throw 'myexit key)))))

(defun reftex-select-mark (&optional separator)
  "Mark the entry."
  (interactive)
  (let* ((data (get-text-property (point) :data))
	 boe eoe ovl)
    (or data (error "No entry to mark at point"))
    (if (assq data reftex-select-marked)
	(error "Entry is already marked"))
    (setq boe (or (previous-single-property-change (1+ (point)) :data)
		  (point-min))
	  eoe (or (next-single-property-change (point) :data) (point-max)))
    (setq ovl (make-overlay boe eoe))
    (push (list data ovl separator) reftex-select-marked)
    (overlay-put ovl 'face reftex-select-mark-face)
    (if (featurep 'xemacs)
	;; before-string property is broken in Emacs
	(overlay-put ovl 'before-string
		     (if separator
			 (format "*%c%d* " separator
				 (length reftex-select-marked))
		       (format "*%d*  " (length reftex-select-marked)))))
    (message "Entry has mark no. %d" (length reftex-select-marked))))

(defun reftex-select-mark-comma ()
  "Mark the entry and store the `comma' separator."
  (interactive)
  (reftex-select-mark ?,))
(defun reftex-select-mark-to ()
  "Mark the entry and store the `to' separator."
  (interactive)
  (reftex-select-mark ?-))
(defun reftex-select-mark-and ()
  "Mark the entry and store `and' to separator."
  (interactive)
  (reftex-select-mark ?+))

(defun reftex-select-unmark ()
  "Unmark the entry."
  (interactive)
  (let* ((data (get-text-property (point) :data))
	 (cell (assq data reftex-select-marked))
	 (ovl (nth 1 cell))
	 (cnt 0)
	 sep)
    (unless cell
      (error "No marked entry at point"))
    (and ovl (delete-overlay ovl))
    (setq reftex-select-marked (delq cell reftex-select-marked))
    (if (featurep 'xemacs)
	;; before-string property is broken in Emacs
	(progn
	  (setq cnt (1+ (length reftex-select-marked)))
	  (mapcar (lambda (c)
		    (setq sep (nth 2 c))
		    (overlay-put (nth 1 c) 'before-string
				 (if sep
				     (format "*%c%d* " sep (decf cnt))
				   (format "*%d*  " (decf cnt)))))
		  reftex-select-marked)))
    (message "Entry no longer marked")))

(defun reftex-select-help ()
  "Display a summary of the special key bindings."
  (interactive)
  (with-output-to-temp-buffer "*RefTeX Help*"
    (princ help-string))
  (reftex-enlarge-to-fit "*RefTeX Help*" t))

;; Common bindings in reftex-select-label-map and reftex-select-bib-map
(let ((map (make-sparse-keymap)))
  (substitute-key-definition
   'next-line 'reftex-select-next		       map global-map)
  (substitute-key-definition
   'previous-line 'reftex-select-previous	       map global-map)
  (substitute-key-definition
   'keyboard-quit 'reftex-select-keyboard-quit         map global-map)
  (substitute-key-definition
   'newline 'reftex-select-accept		       map global-map)

  (loop for x in
	'((" "        . reftex-select-callback)
	  ("n"        . reftex-select-next)
	  ([(down)]   . reftex-select-next)
	  ("p"        . reftex-select-previous)
	  ([(up)]     . reftex-select-previous)
	  ("f"        . reftex-select-toggle-follow)
	  ("\C-m"     . reftex-select-accept)
	  ([(return)] . reftex-select-accept) 
	  ("q"        . reftex-select-quit)
	  ("."        . reftex-select-show-insertion-point)
	  ("?"        . reftex-select-help))
	do (define-key map (car x) (cdr x)))

  ;; The mouse-2 binding
  (if (featurep 'xemacs)
      (define-key map [(button2)] 'reftex-select-mouse-accept)
    (define-key map [(mouse-2)] 'reftex-select-mouse-accept))

  ;; Digit arguments
  (loop for key across "0123456789" do
	(define-key map (vector (list key)) 'digit-argument))
  (define-key map "-" 'negative-argument)

  ;; Make two maps
  (setq reftex-select-label-map map)
  (setq reftex-select-bib-map (copy-keymap map)))

;; Specific bindings in reftex-select-label-map
(loop for key across "aAcgFlrRstx#%" do
      (define-key reftex-select-label-map (vector (list key))
	(list 'lambda '() 
	      "Press `?' during selection to find out about this key."
	      '(interactive) (list 'throw '(quote myexit) key))))

(loop for x in
      '(("b"        . reftex-select-jump-to-previous)
	("v"        . reftex-select-toggle-varioref)
	("V"        . reftex-select-toggle-fancyref)
	("m"        . reftex-select-mark)
	("u"        . reftex-select-unmark)
	(","        . reftex-select-mark-comma)
	("-"        . reftex-select-mark-to)
	("+"        . reftex-select-mark-and)
	([(tab)]    . reftex-select-read-label)
	("\C-i"     . reftex-select-read-label)
	("\C-c\C-n" . reftex-select-next-heading)
	("\C-c\C-p" . reftex-select-previous-heading))
      do
      (define-key reftex-select-label-map (car x) (cdr x)))

;; Specific bindings in reftex-select-bib-map
(loop for key across "grRaA" do
      (define-key reftex-select-bib-map (vector (list key))
	(list 'lambda '() 
	      "Press `?' during selection to find out about this key."
	      '(interactive) (list 'throw '(quote myexit) key))))

(loop for x in
      '(("\C-i"  . reftex-select-read-cite)
	([(tab)] . reftex-select-read-cite)
	("m"     . reftex-select-mark)
	("u"     . reftex-select-unmark))
      do (define-key reftex-select-bib-map (car x) (cdr x)))
  

;;; reftex-sel.el ends here
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