--- /dev/null
+;;; xltabular.el --- AUCTeX style for `xltabular.sty' (v0.05)
+
+;; Copyright (C) 2017 Free Software Foundation, Inc.
+
+;; Author: Arash Esbati <arash@gnu.org>
+;; Maintainer: auctex-devel@gnu.org
+;; Created: 2017-11-03
+;; 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 `xltabular.sty' (v0.05) from 2017/10/26.
+;; `xltabular.sty' is part of TeXLive.
+
+(defvar LaTeX-xltabular-skipping-regexp
+ (concat "[ \t]*" (regexp-opt '("[l]" "[r]" "[c]" "")) "[ \t]*{[^}]*}[ \t]*")
+ "Regexp matching between \\begin{xltabular} and column specification.
+For xltabular environment only. See `LaTeX-insert-ampersands' for detail.
+
+This regexp assumes that the width specification contains neither
+nested curly brace pair nor escaped \"}\".")
+
+(defun LaTeX-env-xltabular (environment)
+ "Insert a xltabular ENVIRONMENT with spec, caption and label."
+ ;; xltabular has the following syntax:
+ ;; \begin{xltabular}[hPos]{width}{ l X ...}
+ ;; Optional <hPos> comes before <width>, hence we cannot use
+ ;; `LaTeX-env-tabular*' here and has to cook our own function which
+ ;; is a combination of `LaTeX-env-tabular*' and
+ ;; `LaTeX-env-longtable':
+ (let* ((pos (completing-read (TeX-argument-prompt t nil "Position")
+ '("l" "r" "c")))
+ (width (TeX-read-string "Width: " LaTeX-default-width))
+ (fmt (TeX-read-string "Format: " LaTeX-default-format))
+ (caption (TeX-read-string "Caption: "))
+ (short-caption (when (>= (length caption) LaTeX-short-caption-prompt-length)
+ (TeX-read-string "(Optional) Short caption: "))))
+ (setq LaTeX-default-format fmt)
+ (LaTeX-insert-environment environment
+ (concat
+ (unless (zerop (length pos))
+ (concat LaTeX-optop pos LaTeX-optcl))
+ (concat TeX-grop width TeX-grcl)
+ (concat TeX-grop fmt TeX-grcl)))
+ ;; top caption -- do nothing if user skips caption
+ (unless (zerop (length caption))
+ ;; insert `\caption[short-caption]{caption':
+ (insert TeX-esc "caption")
+ (when (and short-caption (not (string= short-caption "")))
+ (insert LaTeX-optop short-caption LaTeX-optcl))
+ (insert TeX-grop caption)
+ ;; ask for a label and insert it
+ (LaTeX-label environment 'environment)
+ ;; the longtable `\caption' is equivalent to a
+ ;; `\multicolumn', so it needs a `\\' at the
+ ;; end of the line. Prior to that, add } to
+ ;; close `\caption{'
+ (insert TeX-grcl "\\\\")
+ ;; fill the caption
+ (LaTeX-fill-paragraph)
+ ;; Insert a new line and indent
+ (LaTeX-newline)
+ (indent-according-to-mode))
+ ;; Insert suitable number of &'s, suppress line break
+ (LaTeX-item-xltabular t)))
+
+(defun LaTeX-item-xltabular (&optional suppress)
+ "Insert line break macro on the last line and suitable number of &'s.
+For xltabular environment only.
+
+If SUPPRESS is non-nil, do not insert line break macro."
+ (unless suppress
+ (save-excursion
+ (end-of-line 0)
+ (just-one-space)
+ (TeX-insert-macro "\\")))
+ (LaTeX-insert-ampersands
+ LaTeX-xltabular-skipping-regexp #'LaTeX-array-count-columns))
+
+(TeX-add-style-hook
+ "xltabular"
+ (lambda ()
+ ;; ltablex loads both tabularx and longtable
+ (TeX-run-style-hooks "ltablex")
+
+ ;; Add xltabular with `LaTeX-env-xltabular'::
+ (LaTeX-add-environments '("xltabular" LaTeX-env-xltabular))
+
+ ;; Use the enhanced table formatting. Append to
+ ;; `LaTeX-indent-environment-list' in order not to override custom settings.
+ (add-to-list (make-local-variable 'LaTeX-indent-environment-list)
+ '("xltabular" LaTeX-indent-tabular) t)
+
+ ;; Append xltabular to `LaTeX-label-alist', in order not to
+ ;; override possible custome values.
+ (add-to-list 'LaTeX-label-alist '("xltabular" . LaTeX-table-label) t)
+
+ ;; Append xltabular to `LaTeX-item-list' with `LaTeX-item-xltabular'
+ (add-to-list 'LaTeX-item-list '("xltabular" . LaTeX-item-xltabular) t)
+
+ ;; Tell RefTeX -- This is the same entry as for "longtable" in
+ ;; `reftex-label-alist-builtin':
+ (when (fboundp 'reftex-add-label-environments)
+ (reftex-add-label-environments
+ '(("xltabular" ?t nil nil caption)))))
+ LaTeX-dialect)
+
+(defvar LaTeX-xltabular-package-options nil
+ "Package options for the xltabular package.")
+
+;;; xltabular.el ends here
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