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+;;; preview.el --- AUCTeX style for `preview.sty' (v2010/02/14)  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2017, 2018, 2020 Free Software Foundation, Inc.
+
+;; Author: Arash Esbati <arash@gnu.org>
+;; Maintainer: auctex-devel@gnu.org
+;; Created: 2017-02-05
+;; 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 `preview.sty' v2010/02/14.
+;; `preview.sty' is part of TeXLive.
+
+;;; Code:
+
+(require 'tex)
+(require 'latex)
+
+;; Silence the compiler:
+(declare-function font-latex-add-keywords
+                  "font-latex"
+                  (keywords class))
+
+(defun LaTeX-preview-arg-ifpreview (_optional)
+  "Insert \\else and \\fi part of \\ifPreview command from preview.sty.
+OPTIONAL is ignored."
+  (indent-according-to-mode)
+  (LaTeX-newline)
+  (indent-according-to-mode)
+  (save-excursion
+    (LaTeX-newline)
+    (indent-according-to-mode)
+    (insert TeX-esc "else")
+    (LaTeX-newline)
+    (LaTeX-newline)
+    (indent-according-to-mode)
+    (insert TeX-esc "fi")))
+
+(TeX-add-style-hook
+ "preview"
+ (lambda ()
+
+   (LaTeX-add-environments
+    '("preview")
+    '("nopreview"))
+
+   (TeX-add-symbols
+    '("PreviewMacro" (TeX-arg-conditional (y-or-n-p "With optional arguments? ")
+                                          ( [ t ] [ nil ] )
+                                          ())
+      TeX-arg-macro)
+
+    '("PreviewMacro*" (TeX-arg-conditional (y-or-n-p "With optional arguments? ")
+                                           ( [ t ] [ nil ] )
+                                           ())
+      TeX-arg-macro)
+
+    '("PreviewEnvironment" (TeX-arg-conditional (y-or-n-p "With optional arguments? ")
+                                                ( [ t ] [ nil ] )
+                                                ())
+      TeX-arg-environment)
+
+    '("PreviewEnvironment*" (TeX-arg-conditional (y-or-n-p "With optional arguments? ")
+                                                 ( [ t ] [ nil ] )
+                                                 ())
+      TeX-arg-environment)
+
+    '("PreviewSnarfEnvironment" TeX-arg-environment)
+
+    '("PreviewOpen")
+    '("PreviewClose")
+
+    '("ifPreview" LaTeX-preview-arg-ifpreview))
+
+   ;; Fontification
+   (when (and (featurep 'font-latex)
+              (eq TeX-install-font-lock 'font-latex-setup))
+     (font-latex-add-keywords '(("PreviewMacro"            "*[[{")
+                                ("PreviewEnvironment"      "*[[{")
+                                ("PreviewSnarfEnvironment" "[{"))
+                              'function)))
+ TeX-dialect)
+
+(defvar LaTeX-preview-package-options
+  '("active"      "noconfig"   "psfixbb"
+    "dvips"       "pdftex"     "xetex"
+    "displaymath" "floats"     "textmath"
+    "graphics"    "sections"   "delayed"
+    "auctex"      "showlabels" "tightpage"
+    "lyx"         "counters"   "footnotes"
+    "tracingall"  "showbox")
+  "Package options for the preview package.")
+
+;;; preview.el ends here