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emacs/lisp/textmodes/reftex-parse.el
2006-02-22 07:21:49 +00:00

1074 lines
42 KiB
EmacsLisp

;;; reftex-parse.el --- parser functions for RefTeX
;; Copyright (C) 1997, 1998, 1999, 2000, 2003, 2004, 2005,
;; 2006 Free Software Foundation, Inc.
;; Author: Carsten Dominik <dominik@science.uva.nl>
;; Version: 4.31
;;
;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(provide 'reftex-parse)
(require 'reftex)
(defmacro reftex-with-special-syntax (&rest body)
`(let ((saved-syntax (syntax-table)))
(unwind-protect
(progn
(set-syntax-table reftex-syntax-table)
(let ((case-fold-search nil))
,@body))
(set-syntax-table saved-syntax))))
(defun reftex-parse-one ()
"Re-parse this file."
(interactive)
(let ((reftex-enable-partial-scans t))
(reftex-access-scan-info '(4))))
(defun reftex-parse-all ()
"Re-parse entire document."
(interactive)
(reftex-access-scan-info '(16)))
(defun reftex-do-parse (rescan &optional file)
"Do a document rescan. When allowed, do only a partial scan from FILE."
;; Normalize the rescan argument
(setq rescan (cond ((eq rescan t) t)
((eq rescan 1) 1)
((equal rescan '(4)) t)
((equal rescan '(16)) 1)
(t 1)))
;; Partial scans only when allowed
(unless reftex-enable-partial-scans
(setq rescan 1))
;; Do the scanning.
(let* ((old-list (symbol-value reftex-docstruct-symbol))
(master (reftex-TeX-master-file))
(true-master (file-truename master))
(master-dir (file-name-as-directory (file-name-directory master)))
(file (or file (buffer-file-name)))
(true-file (file-truename file))
(bibview-cache (assq 'bibview-cache old-list))
(index-tags (cdr (assq 'index-tags old-list)))
from-file appendix docstruct tmp)
;; Make sure replacement is really an option here
(when (and (eq rescan t)
(not (and (member (list 'bof file) old-list)
(member (list 'eof file) old-list))))
;; Scan whole document because no such file section exists
(setq rescan 1))
(when (string= true-file true-master)
;; Scan whole document because this file is the master
(setq rescan 1))
;; From which file do we start?
(setq from-file
(cond ((eq rescan t) (or file master))
((eq rescan 1) master)
(t (error "This should not happen (reftex-do-parse)"))))
;; Reset index-tags if we scan everything
(if (equal rescan 1) (setq index-tags nil))
;; Find active toc entry and initialize section-numbers
(setq reftex-active-toc (reftex-last-assoc-before-elt
'toc (list 'bof from-file) old-list)
appendix (reftex-last-assoc-before-elt
'appendix (list 'bof from-file) old-list))
(reftex-init-section-numbers reftex-active-toc appendix)
(if (eq rescan 1)
(message "Scanning entire document...")
(message "Scanning document from %s..." from-file))
(reftex-with-special-syntax
(save-window-excursion
(save-excursion
(unwind-protect
(setq docstruct
(reftex-parse-from-file
from-file docstruct master-dir))
(reftex-kill-temporary-buffers)))))
(message "Scanning document... done")
;; Turn the list around.
(setq docstruct (nreverse docstruct))
;; Set or insert
(setq docstruct (reftex-replace-label-list-segment
old-list docstruct (eq rescan 1)))
;; Add all missing information
(unless (assq 'label-numbers docstruct)
(push (cons 'label-numbers nil) docstruct))
(unless (assq 'master-dir docstruct)
(push (cons 'master-dir master-dir) docstruct))
(unless (assq 'bibview-cache docstruct)
(push (cons 'bibview-cache (cdr bibview-cache)) docstruct))
(let* ((bof1 (memq (assq 'bof docstruct) docstruct))
(bof2 (assq 'bof (cdr bof1)))
(is-multi (not (not (and bof1 bof2))))
(entry (or (assq 'is-multi docstruct)
(car (push (list 'is-multi is-multi) docstruct)))))
(setcdr entry (cons is-multi nil)))
(and index-tags (setq index-tags (sort index-tags 'string<)))
(let ((index-tag-cell (assq 'index-tags docstruct)))
(if index-tag-cell
(setcdr index-tag-cell index-tags)
(push (cons 'index-tags index-tags) docstruct)))
(unless (assq 'xr docstruct)
(let* ((allxr (reftex-all-assq 'xr-doc docstruct))
(alist (mapcar
(lambda (x)
(if (setq tmp (reftex-locate-file (nth 2 x) "tex"
master-dir))
(cons (nth 1 x) tmp)
(message "Can't find external document %s"
(nth 2 x))
nil))
allxr))
(alist (delq nil alist))
(allprefix (delq nil (mapcar 'car alist)))
(regexp (if allprefix
(concat "\\`\\("
(mapconcat 'identity allprefix "\\|")
"\\)")
"\\\\\\\\\\\\"))) ; this will never match
(push (list 'xr alist regexp) docstruct)))
(set reftex-docstruct-symbol docstruct)
(put reftex-docstruct-symbol 'modified t)))
(defun reftex-everything-regexp ()
(if reftex-support-index
reftex-everything-regexp
reftex-everything-regexp-no-index))
;;;###autoload
(defun reftex-all-document-files (&optional relative)
"Return a list of all files belonging to the current document.
When RELATIVE is non-nil, give file names relative to directory
of master file."
(let* ((all (symbol-value reftex-docstruct-symbol))
(master-dir (file-name-directory (reftex-TeX-master-file)))
(re (concat "\\`" (regexp-quote master-dir)))
file-list tmp file)
(while (setq tmp (assoc 'bof all))
(setq file (nth 1 tmp)
all (cdr (memq tmp all)))
(and relative
(string-match re file)
(setq file (substring file (match-end 0))))
(push file file-list))
(nreverse file-list)))
(defun reftex-parse-from-file (file docstruct master-dir)
;; Scan the buffer for labels and save them in a list.
(let ((regexp (reftex-everything-regexp))
(bound 0)
file-found tmp include-file
(level 1)
(highest-level 100)
toc-entry index-entry next-buf buf)
(catch 'exit
(setq file-found (reftex-locate-file file "tex" master-dir))
(if (and (not file-found)
(setq buf (reftex-get-buffer-visiting file)))
(setq file-found (buffer-file-name buf)))
(unless file-found
(push (list 'file-error file) docstruct)
(throw 'exit nil))
(save-excursion
(message "Scanning file %s" file)
(set-buffer
(setq next-buf
(reftex-get-file-buffer-force
file-found
(not (eq t reftex-keep-temporary-buffers)))))
;; Begin of file mark
(setq file (buffer-file-name))
(push (list 'bof file) docstruct)
(reftex-with-special-syntax
(save-excursion
(save-restriction
(widen)
(goto-char 1)
(while (re-search-forward regexp nil t)
(cond
((match-end 1)
;; It is a label
(push (reftex-label-info (reftex-match-string 1) file bound)
docstruct))
((match-end 3)
;; It is a section
(setq bound (point))
;; Insert in List
(setq toc-entry (reftex-section-info file))
(when toc-entry
;; It can happen that section info returns nil
(setq level (nth 5 toc-entry))
(setq highest-level (min highest-level level))
(if (= level highest-level)
(message
"Scanning %s %s ..."
(car (rassoc level reftex-section-levels-all))
(nth 6 toc-entry)))
(push toc-entry docstruct)
(setq reftex-active-toc toc-entry)))
((match-end 7)
;; It's an include or input
(setq include-file (reftex-match-string 7))
;; Test if this file should be ignored
(unless (delq nil (mapcar
(lambda (x) (string-match x include-file))
reftex-no-include-regexps))
;; Parse it
(setq docstruct
(reftex-parse-from-file
include-file
docstruct master-dir))))
((match-end 9)
;; Appendix starts here
(reftex-init-section-numbers nil t)
(push (cons 'appendix t) docstruct))
((match-end 10)
;; Index entry
(when reftex-support-index
(setq index-entry (reftex-index-info file))
(when index-entry
(add-to-list 'index-tags (nth 1 index-entry))
(push index-entry docstruct))))
((match-end 11)
;; A macro with label
(save-excursion
(let* ((mac (reftex-match-string 11))
(label (progn (goto-char (match-end 11))
(save-match-data
(reftex-no-props
(reftex-nth-arg-wrapper
mac)))))
(typekey (nth 1 (assoc mac reftex-env-or-mac-alist)))
(entry (progn (if typekey
;; A typing macro
(goto-char (match-end 0))
;; A neutral macro
(goto-char (match-end 11))
(reftex-move-over-touching-args))
(reftex-label-info
label file bound nil nil))))
(push entry docstruct))))
(t (error "This should not happen (reftex-parse-from-file)")))
)
;; Find bibliography statement
(when (setq tmp (reftex-locate-bibliography-files master-dir))
(push (cons 'bib tmp) docstruct))
(goto-char 1)
(when (re-search-forward
"\\(\\`\\|[\n\r]\\)[ \t]*\\\\begin{thebibliography}" nil t)
(push (cons 'thebib file) docstruct))
;; Find external document specifications
(goto-char 1)
(while (re-search-forward "[\n\r][ \t]*\\\\externaldocument\\(\\[\\([^]]*\\)\\]\\)?{\\([^}]+\\)}" nil t)
(push (list 'xr-doc (reftex-match-string 2)
(reftex-match-string 3))
docstruct))
;; End of file mark
(push (list 'eof file) docstruct)))))
;; Kill the scanned buffer
(reftex-kill-temporary-buffers next-buf))
;; Return the list
docstruct))
(defun reftex-locate-bibliography-files (master-dir &optional files)
;; Scan buffer for bibliography macro and return file list.
(unless files
(save-excursion
(goto-char (point-min))
(if (re-search-forward
(concat
; "\\(\\`\\|[\n\r]\\)[^%]*\\\\\\("
"\\(^\\)[^%\n\r]*\\\\\\("
(mapconcat 'identity reftex-bibliography-commands "\\|")
"\\){[ \t]*\\([^}]+\\)") nil t)
(setq files
(split-string (reftex-match-string 3)
"[ \t\n\r]*,[ \t\n\r]*")))))
(when files
(setq files
(mapcar
(lambda (x)
(if (or (member x reftex-bibfile-ignore-list)
(delq nil (mapcar (lambda (re) (string-match re x))
reftex-bibfile-ignore-regexps)))
;; excluded file
nil
;; find the file
(reftex-locate-file x "bib" master-dir)))
files))
(delq nil files)))
(defun reftex-replace-label-list-segment (old insert &optional entirely)
;; Replace the segment in OLD which corresponds to INSERT.
;; Works with side effects, directly changes old.
;; If entirely is t, just return INSERT.
;; This function also makes sure the old toc markers do not point anywhere.
(cond
(entirely
(reftex-silence-toc-markers old (length old))
insert)
(t (let* ((new old)
(file (nth 1 (car insert)))
(eof-list (member (list 'eof file) old))
(bof-list (member (list 'bof file) old))
n)
(if (not (and bof-list eof-list))
(error "Cannot splice")
;; Splice
(reftex-silence-toc-markers bof-list (- (length bof-list)
(length eof-list)))
(setq n (- (length old) (length bof-list)))
(setcdr (nthcdr n new) (cdr insert))
(setcdr (nthcdr (1- (length new)) new) (cdr eof-list)))
new))))
(defun reftex-section-info (file)
;; Return a section entry for the current match.
;; Carefull: This function expects the match-data to be still in place!
(let* ((marker (set-marker (make-marker) (1- (match-beginning 3))))
(macro (reftex-match-string 3))
(prefix (save-match-data
(if (string-match "begin{\\([^}]+\\)}" macro)
(match-string 1 macro))))
(level-exp (cdr (assoc macro reftex-section-levels-all)))
(level (if (symbolp level-exp)
(save-match-data (funcall level-exp))
level-exp))
(star (= ?* (char-after (match-end 3))))
(unnumbered (or star (< level 0)))
(level (abs level))
(section-number (reftex-section-number level unnumbered))
(text1 (save-match-data
(save-excursion
(reftex-context-substring prefix))))
(literal (buffer-substring-no-properties
(1- (match-beginning 3))
(min (point-max) (+ (match-end 0) (length text1) 1))))
;; Literal can be too short since text1 too short. No big problem.
(text (reftex-nicify-text text1)))
;; Add section number and indentation
(setq text
(concat
(make-string (* reftex-level-indent level) ?\ )
(if (nth 1 reftex-label-menu-flags) ; section number flag
(concat section-number " "))
(if prefix (concat (capitalize prefix) ": ") "")
text))
(list 'toc "toc" text file marker level section-number
literal (marker-position marker))))
(defun reftex-ensure-index-support (&optional abort)
;; When index support is turned off, ask to turn it on and
;; set the current prefix argument so that `reftex-access-scan-info'
;; will rescan the entire document.
(cond
(reftex-support-index t)
((y-or-n-p "Turn on index support and rescan entire document? ")
(setq reftex-support-index 'demanded
current-prefix-arg '(16)))
(t (if abort
(error "No index support")
(message "No index support")
(ding)
(sit-for 1)))))
(defun reftex-index-info-safe (file)
(reftex-with-special-syntax
(reftex-index-info file)))
(defvar test-dummy)
(defun reftex-index-info (file)
;; Return an index entry for the current match.
;; Carefull: This function expects the match-data to be still in place!
(catch 'exit
(let* ((macro (reftex-match-string 10))
(bom (match-beginning 10))
(boa (match-end 10))
(entry (or (assoc macro reftex-index-macro-alist)
(throw 'exit nil)))
(exclude (nth 3 entry))
;; The following is a test if this match should be excluded
(test-dummy (and (fboundp exclude)
(funcall exclude)
(throw 'exit nil)))
(itag (nth 1 entry))
(prefix (nth 2 entry))
(index-tag
(cond ((stringp itag) itag)
((integerp itag)
(progn (goto-char boa)
(or (reftex-nth-arg itag (nth 6 entry)) "idx")))
(t "idx")))
(arg (or (progn (goto-char boa)
(reftex-nth-arg (nth 5 entry) (nth 6 entry)))
""))
(end-of-args (progn (goto-char boa)
(reftex-move-over-touching-args)
(point)))
(end-of-context (progn (skip-chars-forward "^ \t\n\r") (point)))
(begin-of-context
(progn (goto-char bom)
(skip-chars-backward "^ \t\r\n")
(point)))
(context (buffer-substring-no-properties
begin-of-context end-of-context))
(key-end (if (string-match reftex-index-key-end-re arg)
(1+ (match-beginning 0))))
(rawkey (substring arg 0 key-end))
(key (if prefix (concat prefix rawkey) rawkey))
(sortkey (downcase key))
(showkey (mapconcat 'identity
(split-string key reftex-index-level-re)
" ! ")))
(goto-char end-of-args)
;; 0 1 2 3 4 5 6 7 8 9
(list 'index index-tag context file bom arg key showkey sortkey key-end))))
(defun reftex-short-context (env parse &optional bound derive)
;; Get about one line of useful context for the label definition at point.
(if (consp parse)
(setq parse (if derive (cdr parse) (car parse))))
(reftex-nicify-text
(cond
((null parse)
(save-excursion
(reftex-context-substring)))
((eq parse t)
(if (string= env "section")
;; special treatment for section labels
(save-excursion
(if (and (re-search-backward reftex-section-or-include-regexp
(point-min) t)
(match-end 2))
(progn
(goto-char (match-end 0))
(reftex-context-substring))
(if reftex-active-toc
(progn
(string-match "{\\([^}]*\\)" (nth 7 reftex-active-toc))
(match-string 1 (nth 7 reftex-active-toc)))
"SECTION HEADING NOT FOUND")))
(save-excursion
(goto-char reftex-default-context-position)
(unless (eq (string-to-char env) ?\\)
(reftex-move-over-touching-args))
(reftex-context-substring))))
((stringp parse)
(save-excursion
(if (re-search-backward parse bound t)
(progn
(goto-char (match-end 0))
(reftex-context-substring))
"NO MATCH FOR CONTEXT REGEXP")))
((integerp parse)
(or (save-excursion
(goto-char reftex-default-context-position)
(reftex-nth-arg
parse
(nth 6 (assoc env reftex-env-or-mac-alist))))
""))
((fboundp parse)
;; A hook function. Call it.
(save-excursion
(condition-case error-var
(funcall parse env)
(error (format "HOOK ERROR: %s" (cdr error-var))))))
(t
"INVALID VALUE OF PARSE"))))
(defun reftex-where-am-I ()
;; Return the docstruct entry above point. Actually returns a cons
;; cell in which the cdr is a flag indicating if the information is
;; exact (t) or approximate (nil).
(let ((docstruct (symbol-value reftex-docstruct-symbol))
(cnt 0) rtn rtn-if-no-other
found)
(save-excursion
(while (not rtn)
(incf cnt)
(setq found (re-search-backward (reftex-everything-regexp) nil t))
(setq rtn
(cond
((not found)
;; no match
(or
(car (member (list 'bof (buffer-file-name)) docstruct))
(not (setq cnt 2))
(assq 'bof docstruct) ;; for safety reasons
'corrupted))
((match-end 1)
;; Label
(assoc (reftex-match-string 1)
(symbol-value reftex-docstruct-symbol)))
((match-end 3)
;; Section
(goto-char (1- (match-beginning 3)))
(let* ((list (member (list 'bof (buffer-file-name))
docstruct))
(endelt (car (member (list 'eof (buffer-file-name))
list)))
rtn1)
(while (and list (not (eq endelt (car list))))
(if (and (eq (car (car list)) 'toc)
(string= (buffer-file-name)
(nth 3 (car list))))
(cond
((equal (point)
(or (and (markerp (nth 4 (car list)))
(marker-position (nth 4 (car list))))
(nth 8 (car list))))
;; Fits with marker position or recorded position
(setq rtn1 (car list) list nil))
((looking-at (reftex-make-regexp-allow-for-ctrl-m
(nth 7 (car list))))
;; Same title: remember, but keep looking
(setq rtn-if-no-other (car list)))))
(pop list))
rtn1))
((match-end 7)
;; Input or include...
(car
(member (list 'eof (reftex-locate-file
(reftex-match-string 7) "tex"
(cdr (assq 'master-dir docstruct))))
docstruct)))
((match-end 9)
(assq 'appendix (symbol-value reftex-docstruct-symbol)))
((match-end 10)
;; Index entry
(when reftex-support-index
(let* ((index-info (save-excursion
(reftex-index-info-safe nil)))
(list (member (list 'bof (buffer-file-name))
docstruct))
(endelt (car (member (list 'eof (buffer-file-name))
list)))
dist last-dist last (n 0))
;; Check all index entries with equal text
(while (and list (not (eq endelt (car list))))
(when (and (eq (car (car list)) 'index)
(string= (nth 2 index-info)
(nth 2 (car list))))
(incf n)
(setq dist (abs (- (point) (nth 4 (car list)))))
(if (or (not last-dist) (< dist last-dist))
(setq last-dist dist last (car list))))
(setq list (cdr list)))
;; We are sure if we have only one, or a zero distance
(cond ((or (= n 1) (equal dist 0)) last)
((> n 1) (setq cnt 2) last)
(t nil)))))
((match-end 11)
(save-excursion
(goto-char (match-end 11))
(assoc (reftex-no-props
(reftex-nth-arg-wrapper
(reftex-match-string 11)))
(symbol-value reftex-docstruct-symbol))))
(t
(error "This should not happen (reftex-where-am-I)"))))))
;; Check if there was only a by-name match for the section.
(when (and (not rtn) rtn-if-no-other)
(setq rtn rtn-if-no-other
cnt 2))
(cons rtn (eq cnt 1))))
(defun reftex-notice-new (&optional n force)
"Hook to handshake with RefTeX after something new has been inserted."
;; Add a new entry to the docstruct list. If it is a section, renumber
;; the following sections.
;; FIXME: Put in a WHAT parameter and search backward until one is found.
;; When N is given, go back that many matches of reftex-everything-regexp
;; When FORCE is non-nil, also insert if `reftex-where-am-I' was uncertain.
(condition-case nil
(catch 'exit
(unless reftex-mode (throw 'exit nil))
(reftex-access-scan-info)
(let* ((docstruct (symbol-value reftex-docstruct-symbol))
here-I-am appendix tail entry star level
section-number context)
(save-excursion
(when (re-search-backward (reftex-everything-regexp) nil t (or n 1))
;; Find where we are
(setq here-I-am (reftex-where-am-I))
(or here-I-am (throw 'exit nil))
(unless (or force (cdr here-I-am)) (throw 'exit nil))
(setq tail (memq (car here-I-am) docstruct))
(or tail (throw 'exit nil))
(setq reftex-active-toc (reftex-last-assoc-before-elt
'toc (car here-I-am) docstruct)
appendix (reftex-last-assoc-before-elt
'appendix (car here-I-am) docstruct))
;; Initialize section numbers
(if (eq (car (car here-I-am)) 'appendix)
(reftex-init-section-numbers nil t)
(reftex-init-section-numbers reftex-active-toc appendix))
;; Match the section command
(when (re-search-forward (reftex-everything-regexp) nil t)
(cond
((match-end 1)
(push (reftex-label-info (reftex-match-string 1) buffer-file-name)
(cdr tail)))
((match-end 3)
(setq star (= ?* (char-after (match-end 3)))
entry (reftex-section-info (buffer-file-name))
level (nth 5 entry))
;; Insert the section info
(push entry (cdr tail))
;; We are done unless we use section numbers
(unless (nth 1 reftex-label-menu-flags) (throw 'exit nil))
;; Update the remaining toc items
(setq tail (cdr tail))
(while (and (setq tail (memq (assq 'toc (cdr tail)) tail))
(setq entry (car tail))
(>= (nth 5 entry) level))
(setq star (string-match "\\*" (nth 6 entry))
context (nth 2 entry)
section-number
(reftex-section-number (nth 5 entry) star))
(when (string-match "\\`\\([ \t]*\\)\\([.0-9A-Z]+\\)\\(.*\\)"
context)
(when (and (not appendix)
(>= (string-to-char (match-string 2)) ?A))
;; Just entered the appendex. Get out.
(throw 'exit nil))
;; Change the section number.
(setf (nth 2 entry)
(concat (match-string 1 context)
section-number
(match-string 3 context))))))
((match-end 10)
;; Index entry
(and reftex-support-index
(setq entry (reftex-index-info-safe buffer-file-name))
;; FIXME: (add-to-list 'index-tags (nth 1 index-entry))
(push entry (cdr tail))))))))))
(error nil))
)
(defsubst reftex-move-to-previous-arg (&optional bound)
;; Assuming that we are in front of a macro argument,
;; move backward to the closing parenthesis of the previous argument.
;; This function understands the splitting of macros over several lines
;; in TeX.
(cond
;; Just to be quick:
((memq (preceding-char) '(?\] ?\})))
;; Do a search
((and reftex-allow-detached-macro-args
(re-search-backward
"[]}][ \t]*[\n\r]?\\([ \t]*%[^\n\r]*[\n\r]\\)*[ \t]*\\=" bound t))
(goto-char (1+ (match-beginning 0)))
t)
(t nil)))
(defun reftex-what-macro-safe (which &optional bound)
;; reftex-what-macro with special syntax table.
(reftex-with-special-syntax
(reftex-what-macro which bound)))
(defun reftex-what-macro (which &optional bound)
;; Find out if point is within the arguments of any TeX-macro.
;; The return value is either ("\\macro" . (point)) or a list of them.
;; If WHICH is nil, immediately return nil.
;; If WHICH is 1, return innermost enclosing macro.
;; If WHICH is t, return list of all macros enclosing point.
;; If WHICH is a list of macros, look only for those macros and return the
;; name of the first macro in this list found to enclose point.
;; If the optional BOUND is an integer, bound backwards directed
;; searches to this point. If it is nil, limit to nearest \section -
;; like statement.
;; This function is pretty stable, but can be fooled if the text contains
;; things like \macro{aa}{bb} where \macro is defined to take only one
;; argument. As RefTeX cannot know this, the string "bb" would still be
;; considered an argument of macro \macro.
(unless reftex-section-regexp (reftex-compile-variables))
(catch 'exit
(if (null which) (throw 'exit nil))
(let ((bound (or bound (save-excursion (re-search-backward
reftex-section-regexp nil 1)
(point))))
pos cmd-list cmd cnt cnt-opt entry)
(save-restriction
(save-excursion
(narrow-to-region (max 1 bound) (point-max))
;; move back out of the current parenthesis
(while (condition-case nil
(progn (up-list -1) t)
(error nil))
(setq cnt 1 cnt-opt 0)
;; move back over any touching sexps
(while (and (reftex-move-to-previous-arg bound)
(condition-case nil
(progn (backward-sexp) t)
(error nil)))
(if (eq (following-char) ?\[) (incf cnt-opt))
(incf cnt))
(setq pos (point))
(when (and (or (= (following-char) ?\[)
(= (following-char) ?\{))
(re-search-backward "\\\\[*a-zA-Z]+\\=" nil t))
(setq cmd (reftex-match-string 0))
(when (looking-at "\\\\begin{[^}]*}")
(setq cmd (reftex-match-string 0)
cnt (1- cnt)))
;; This does ignore optional arguments. Very hard to fix.
(when (setq entry (assoc cmd reftex-env-or-mac-alist))
(if (> cnt (or (nth 4 entry) 100))
(setq cmd nil)))
(cond
((null cmd))
((eq t which)
(push (cons cmd (point)) cmd-list))
((or (eq 1 which) (member cmd which))
(throw 'exit (cons cmd (point))))))
(goto-char pos)))
(nreverse cmd-list)))))
(defun reftex-what-environment (which &optional bound)
;; Find out if point is inside a LaTeX environment.
;; The return value is (e.g.) either ("equation" . (point)) or a list of
;; them.
;; If WHICH is nil, immediately return nil.
;; If WHICH is 1, return innermost enclosing environment.
;; If WHICH is t, return list of all environments enclosing point.
;; If WHICH is a list of environments, look only for those environments and
;; return the name of the first environment in this list found to enclose
;; point.
;; If the optional BOUND is an integer, bound backwards directed searches to
;; this point. If it is nil, limit to nearest \section - like statement.
(unless reftex-section-regexp (reftex-compile-variables))
(catch 'exit
(save-excursion
(if (null which) (throw 'exit nil))
(let ((bound (or bound (save-excursion (re-search-backward
reftex-section-regexp nil 1)
(point))))
env-list end-list env)
(while (re-search-backward "\\\\\\(begin\\|end\\){\\([^}]+\\)}"
bound t)
(setq env (buffer-substring-no-properties
(match-beginning 2) (match-end 2)))
(cond
((string= (match-string 1) "end")
(push env end-list))
((equal env (car end-list))
(setq end-list (cdr end-list)))
((eq t which)
(push (cons env (point)) env-list))
((or (eq 1 which) (member env which))
(throw 'exit (cons env (point))))))
(nreverse env-list)))))
(defun reftex-what-special-env (which &optional bound)
;; Run the special environment parsers and return the matches.
;;
;; The return value is (e.g.) either ("my-parser-function" . (point))
;; or a list of them.
;; If WHICH is nil, immediately return nil.
;; If WHICH is 1, return innermost enclosing environment.
;; If WHICH is t, return list of all environments enclosing point.
;; If WHICH is a list of environments, look only for those environments and
;; return the name of the first environment in this list found to enclose
;; point.
(unless reftex-section-regexp (reftex-compile-variables))
(catch 'exit
(save-excursion
(if (null reftex-special-env-parsers) (throw 'exit nil))
(if (null which) (throw 'exit nil))
(let ((bound (or bound (save-excursion (re-search-backward
reftex-section-regexp nil 1)
(point))))
(fun-list (if (listp which)
(mapcar (lambda (x) (if (memq x which) x nil))
reftex-special-env-parsers)
reftex-special-env-parsers))
specials rtn)
;; Call all functions
(setq specials (mapcar
(lambda (fun)
(save-excursion
(setq rtn (and fun (funcall fun bound)))
(if rtn (cons (symbol-name fun) rtn) nil)))
fun-list))
;; Delete the non-matches
(setq specials (delq nil specials))
;; Sort
(setq specials (sort specials (lambda (a b) (> (cdr a) (cdr b)))))
(if (eq which t)
specials
(car specials))))))
(defsubst reftex-move-to-next-arg (&optional ignore)
;; Assuming that we are at the end of a macro name or a macro argument,
;; move forward to the opening parenthesis of the next argument.
;; This function understands the splitting of macros over several lines
;; in TeX.
(cond
;; Just to be quick:
((memq (following-char) '(?\[ ?\{)))
;; Do a search
((and reftex-allow-detached-macro-args
(looking-at "[ \t]*[\n\r]?\\([ \t]*%[^\n\r]*[\n\r]\\)*[ \t]*[[{]"))
(goto-char (1- (match-end 0)))
t)
(t nil)))
(defun reftex-nth-arg-wrapper (key)
(let ((entry (assoc key reftex-env-or-mac-alist)))
(reftex-nth-arg (nth 5 entry) (nth 6 entry))))
(defun reftex-nth-arg (n &optional opt-args)
;; Return the nth following {} or [] parentheses content.
;; OPT-ARGS is a list of argument numbers which are optional.
;; If we are sitting at a macro start, skip to end of macro name.
(and (eq (following-char) ?\\) (skip-chars-forward "a-zA-Z*\\\\"))
(if (= n 1000)
;; Special case: Skip all touching arguments
(progn
(reftex-move-over-touching-args)
(reftex-context-substring))
;; Do the real thing.
(let ((cnt 1))
(when (reftex-move-to-next-arg)
(while (< cnt n)
(while (and (member cnt opt-args)
(eq (following-char) ?\{))
(incf cnt))
(when (< cnt n)
(unless (and (condition-case nil
(or (forward-list 1) t)
(error nil))
(reftex-move-to-next-arg)
(incf cnt))
(setq cnt 1000))))
(while (and (memq cnt opt-args)
(eq (following-char) ?\{))
(incf cnt)))
(if (and (= n cnt)
(> (skip-chars-forward "{\\[") 0))
(reftex-context-substring)
nil))))
(defun reftex-move-over-touching-args ()
(condition-case nil
(while (memq (following-char) '(?\[ ?\{))
(forward-list 1))
(error nil)))
(defun reftex-context-substring (&optional to-end)
;; Return up to 150 chars from point
;; When point is just after a { or [, limit string to matching parenthesis
(cond
(to-end
;; Environment - find next \end
(buffer-substring-no-properties
(point)
(min (+ (point) 150)
(save-match-data
;; FIXME: This is not perfect
(if (re-search-forward "\\\\end{" nil t)
(match-beginning 0)
(point-max))))))
((or (= (preceding-char) ?\{)
(= (preceding-char) ?\[))
;; Inside a list - get only the list.
(buffer-substring-no-properties
(point)
(min (+ (point) 150)
(point-max)
(condition-case nil
(progn
(up-list 1)
(1- (point)))
(error (point-max))))))
(t
;; no list - just grab 150 characters
(buffer-substring-no-properties (point)
(min (+ (point) 150) (point-max))))))
;; Variable holding the vector with section numbers
(defvar reftex-section-numbers (make-vector reftex-max-section-depth 0))
(defun reftex-init-section-numbers (&optional toc-entry appendix)
;; Initialize the section numbers with zeros or with what is found
;; in the toc entry.
(let* ((level (or (nth 5 toc-entry) -1))
(numbers (nreverse (split-string (or (nth 6 toc-entry) "") "\\.")))
(depth (1- (length reftex-section-numbers)))
(i depth) number-string)
(while (>= i 0)
(if (> i level)
(aset reftex-section-numbers i 0)
(setq number-string (or (car numbers) "0"))
(if (string-match "\\`[A-Z]\\'" number-string)
(aset reftex-section-numbers i
(- (string-to-char number-string) ?A -1))
(aset reftex-section-numbers i (string-to-number number-string)))
(pop numbers))
(decf i)))
(put 'reftex-section-numbers 'appendix appendix))
(defun reftex-section-number (&optional level star)
;; Return a string with the current section number.
;; When LEVEL is non-nil, increase section numbers on that level.
(let* ((depth (1- (length reftex-section-numbers))) idx n (string "")
(appendix (get 'reftex-section-numbers 'appendix))
(partspecial (and (not reftex-part-resets-chapter)
(equal level 0))))
;; partspecial means, this is a part statement.
;; Parts do not reset the chapter counter, and the part number is
;; not included in the numbering of other sectioning levels.
(when level
(when (and (> level -1) (not star))
(aset reftex-section-numbers
level (1+ (aref reftex-section-numbers level))))
(setq idx (1+ level))
(when (not star)
(while (<= idx depth)
(if (or (not partspecial)
(not (= idx 1)))
(aset reftex-section-numbers idx 0))
(incf idx))))
(if partspecial
(setq string (concat "Part " (reftex-roman-number
(aref reftex-section-numbers 0))))
(setq idx (if reftex-part-resets-chapter 0 1))
(while (<= idx depth)
(setq n (aref reftex-section-numbers idx))
(if (not (and partspecial (not (equal string ""))))
(setq string (concat string (if (not (string= string "")) "." "")
(int-to-string n))))
(incf idx))
(save-match-data
(if (string-match "\\`\\([@0]\\.\\)+" string)
(setq string (replace-match "" nil nil string)))
(if (string-match "\\(\\.0\\)+\\'" string)
(setq string (replace-match "" nil nil string)))
(if (and appendix
(string-match "\\`[0-9]+" string))
(setq string
(concat
(char-to-string
(1- (+ ?A (string-to-number (match-string 0 string)))))
(substring string (match-end 0))))))
(if star
(concat (make-string (1- (length string)) ?\ ) "*")
string))))
(defun reftex-roman-number (n)
;; Return as a string the roman number equal to N.
(let ((nrest n)
(string "")
(list '((1000 . "M") ( 900 . "CM") ( 500 . "D") ( 400 . "CD")
( 100 . "C") ( 90 . "XC") ( 50 . "L") ( 40 . "XL")
( 10 . "X") ( 9 . "IX") ( 5 . "V") ( 4 . "IV")
( 1 . "I")))
listel i s)
(while (>= nrest 1)
(setq listel (pop list)
i (car listel)
s (cdr listel))
(while (>= nrest i)
(setq string (concat string s)
nrest (- nrest i))))
string))
;;; arch-tag: 6a8168f7-abb9-4576-99dc-fcbc7ba901a3
;;; reftex-parse.el ends here