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+;;; algpseudocode.el --- AUCTeX style for the (LaTeX) algpseudocode package  -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020--2022 Free Software Foundation, Inc.
+
+;; Author: Uwe Brauer <oub@mat.ucm.es>
+;; Created: 2020-01-26
+;; 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 the algpseudocode package.
+
+;;; Code:
+
+(require 'tex)
+(require 'latex)
+
+;; Silence the compiler:
+(declare-function font-latex-add-keywords
+                  "font-latex"
+                  (keywords class))
+
+(defvar LaTeX-algpseudocode-package-options
+  '("compatible" "nocompatible" "end" "noend")
+  "Package options for the algpseudocode package.")
+
+(TeX-add-style-hook
+ "algpseudocode"
+ (lambda ()
+   (TeX-add-symbols
+    ;; 2.3 Simple lines
+    '("State"  (TeX-arg-literal " "))
+    '("Statex" 0)
+
+    ;; 2.4 Placing comments in sources
+    '("Comment" 1)
+
+    ;; 2.5 Labels and references
+    '("algref" (TeX-arg-ref "Algorithm") (TeX-arg-ref "Line"))
+
+    ;; 2.6 Breaking up long algorithms
+    '("algstore" 1)
+    '("algstore*" 1)
+    '("algrestore" 1)
+    '("algrestore*" 1)
+
+    ;; 3.1.1 The for block
+    '("For" 1)
+    '("ForAll" 1)
+    '("EndFor" 0)
+
+    ;; 3.1.2 The while block
+    '("While" 1)
+    '("EndWhile" 0)
+
+    ;; 3.1.3 The repeat block
+    '("Repeat" 0)
+    '("Until" 1)
+
+    ;; 3.1.4 The if block
+    '("If" 1)
+    '("ElsIf" 1)
+    '("Else" 0)
+    '("EndIf" 0)
+
+    ;; 3.1.5 The procedure block
+    '("Procedure" 2)
+    '("EndProcedure" 0)
+
+    ;; 3.1.6 The function block
+    '("Function" 2)
+    '("EndFunction" 0)
+
+    ;; 3.1.7 The loop block
+    '("Loop" 0)
+    '("EndLoop" 0)
+
+    ;; 3.1.8 Other commands in this layout
+    '("Require" (TeX-arg-literal " "))
+    '("Ensure"  (TeX-arg-literal " "))
+    '("Call" 2))
+
+   (LaTeX-add-environments
+    '("algorithmic" [ "Number" ]))
+
+   ;; Indentation: Add the keywords above to the respective variables
+   ;; and run `LaTeX-indent-commands-regexp-make'.
+   (let ((beg '("For" "ForAll"
+                "While"
+                "Repeat"
+                "If"
+                "Procedure"
+                "Function"
+                "Loop"))
+         (mid '("ElsIf" "Else"))
+         (end '("EndFor"
+                "EndWhile"
+                "Until"
+                "EndIf"
+                "EndProcedure"
+                "EndFunction"
+                "EndLoop")))
+     (dolist (elt beg)
+       (add-to-list 'LaTeX-indent-begin-list elt t))
+     (dolist (elt mid)
+       (add-to-list 'LaTeX-indent-mid-list elt t))
+     (dolist (elt end)
+       (add-to-list 'LaTeX-indent-end-list elt t))
+     (LaTeX-indent-commands-regexp-make))
+
+   ;; Add the 'algorithmic' environment to a local version of
+   ;; `LaTeX-indent-environment-list'.  This effectively kills filling
+   ;; but indenting works as expected.  Hence, 'M-q' gives a better
+   ;; experience.
+   (add-to-list (make-local-variable 'LaTeX-indent-environment-list)
+                '("algorithmic")
+                t)
+
+   ;; Fontification
+   (when (and (featurep 'font-latex)
+              (eq TeX-install-font-lock 'font-latex-setup))
+     (font-latex-add-keywords '(("algref" "{{"))
+                              'reference)))
+ TeX-dialect)
+
+;;; algpseudocode.el ends here