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+;;; pdfsync.el --- AUCTeX style for `pdfsync.sty' -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2005-2021 Free Software Foundation, Inc.
+
+;; Author: Ralf Angeli <angeli@iwi.uni-sb.de>
+;; Maintainer: auctex-devel@gnu.org
+;; Created: 2005-12-28
+;; Keywords: tex
+
+;; This file is part of AUCTeX.
+
+;; AUCTeX is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; AUCTeX 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 AUCTeX; see the file COPYING. If not, write to the Free
+;; Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+;; 02110-1301, USA.
+
+;;; Commentary:
+
+;; This file adds support for `pdfsync.sty'.
+
+;;; Code:
+
+(require 'tex)
+
+(defun LaTeX-pdfsync-output-page ()
+ "Return page number in output file corresponding to buffer position."
+ (let* ((line (line-number-at-pos))
+ (master (TeX-active-master))
+ (file (file-name-sans-extension
+ (file-relative-name (buffer-file-name)
+ (file-name-directory master))))
+ (pdfsync-file (concat master ".pdfsync"))
+ (buf-live-p (get-file-buffer pdfsync-file))
+ (sync-record "0")
+ (sync-page "1")
+ last-match)
+ (when (file-exists-p pdfsync-file)
+ (with-current-buffer (find-file-noselect pdfsync-file)
+ (save-restriction
+ (goto-char (point-min))
+ ;; Narrow region to file in question.
+ (when (not (string= file master))
+ (re-search-forward (concat "^(" file "\\(.tex\\)?$") nil t)
+ (let ((beg (match-beginning 0)))
+ (goto-char beg)
+ (narrow-to-region (line-beginning-position 2)
+ (progn (forward-sexp) (point))))
+ (goto-char (point-min)))
+ ;; Look for the record number.
+ (catch 'break
+ (while (re-search-forward "^(\\|^l \\([0-9]+\\) \\([0-9]+\\)" nil t)
+ (cond ((string= (match-string 0) "(")
+ (goto-char (match-beginning 0))
+ (forward-sexp))
+ ((> (string-to-number (match-string 2)) line)
+ (throw 'break nil))
+ (t
+ (setq sync-record (match-string 1)
+ last-match (match-beginning 0))))))
+ ;; Look for the page number.
+ (goto-char (or last-match (point-min)))
+ ;; There might not be any p or s lines for the current file,
+ ;; so make it possible to search further.
+ (widen)
+ (catch 'break
+ (while (re-search-forward "^p \\([0-9]+\\)" nil t)
+ (when (>= (string-to-number (match-string 1))
+ (string-to-number sync-record))
+ (re-search-backward "^s \\([0-9]+\\)" nil t)
+ (setq sync-page (match-string 1))
+ (throw 'break nil)))))
+ ;; Kill the buffer if it was loaded by us.
+ (unless buf-live-p (kill-buffer (current-buffer)))))
+ sync-page))
+
+(TeX-add-style-hook
+ "pdfsync"
+ (lambda ()
+ (setq TeX-source-correlate-output-page-function #'LaTeX-pdfsync-output-page))
+ TeX-dialect)
+
+;;; pdfsync.el ends here