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;;; Insert texinfo index entries into arm*.texinfo -*- lexical-binding:t -*-
;; Copyright (C) 2020 Free Software Foundation, Inc.
;;
;; Author: Stephen Leake <stephen_leake@stephe-leake.org>
;; Maintainer: Stephen Leake <stephen_leake@stephe-leake.org>
;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
(defun insert-index-entries ()
"Read the index @chapter, insert @cindex entries in sections."
;; The texinfo file is produced by the arm_form executable; see
;; arm_texi.adb for some info.
(goto-char (point-min))
;; First add the menu entry
(search-forward "@menu")
(search-forward "@end menu")
(goto-char (line-beginning-position))
(insert "* Concept Index :: Concept Index\n")
;; now the command to build the index and print it
(goto-char (point-max))
(goto-char (line-beginning-position 0))
(insert "@node Concept Index\n")
(insert "@unnumbered Concept Index\n")
(insert "@printindex cp\n")
;; Now insert all the @cindex items
(search-backward "@chapter Index")
(let (next-search-pos)
(while (search-forward-regexp "@ref{ \\([0-9]+\\), \\([0-9.(/)]+\\)}" nil t)
(setq next-search-pos (copy-marker (point))) ;; we are inserting text before this point!
;; There can be more than one @ref on a line; they are all for the
;; same entry; texinfo can handle that.
(let ((ref (match-string-no-properties 1))
text)
(goto-char (line-beginning-position))
(when (looking-at "\\(?:@w{ }\\)*\\(.*?\\)@w{ }")
(setq text (match-string-no-properties 1))
(goto-char (point-min))
(search-forward (concat "@anchor{ " ref "}"))
(insert (concat "\n@cindex " text "\n")))
(goto-char next-search-pos)))))
(defun do-index (filename)
(find-file filename)
(insert-index-entries)
(save-buffer))
(provide 'arm-texi-index)
;;; ada-mode.el ends here
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