infohack.el

   1 ;;; infohack.el --- a hack to format info file.
   2 ;; Copyright (C)  2001, 2003, 2004, 2008  Free Software Foundation, Inc.
   3
   4 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
   5 ;; Keywords: info
   6
   7 ;; This file is part of GNU Emacs.
   8
   9 ;; GNU Emacs is free software; you can redistribute it and/or modify
  10 ;; it under the terms of the GNU General Public License as published by
  11 ;; the Free Software Foundation; either version 3, or (at your option)
  12 ;; any later version.
  13
  14 ;; GNU Emacs is distributed in the hope that it will be useful,
  15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 ;; GNU General Public License for more details.
  18
  19 ;; You should have received a copy of the GNU General Public License
  20 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  21 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22 ;; Boston, MA 02110-1301, USA.
  23
  24 ;;; Commentary:
  25
  26 ;;; Code:
  27
  28 (load-file (expand-file-name "ptexinfmt.el" "./"))
  29
  30 (defun infohack-remove-unsupported ()
  31   (goto-char (point-min))
  32   (while (re-search-forward "@\\(end \\)?ifnottex" nil t)
  33     (replace-match ""))
  34   (goto-char (point-min))
  35   (while (search-forward "\n@iflatex\n" nil t)
  36     (delete-region (1+ (match-beginning 0))
  37                    (search-forward "\n@end iflatex\n"))))
  38
  39 (defun infohack (file)
  40   (let ((dest-directory default-directory)
  41         (max-lisp-eval-depth (max max-lisp-eval-depth 600))
  42         coding-system)
  43     ;; Emacs 21.3 doesn't support @documentencoding
  44     (unless (get 'documentencoding 'texinfo-format)
  45       (put 'documentencoding 'texinfo-format
  46            'texinfo-discard-line-with-args))
  47     (find-file file)
  48     (setq buffer-read-only nil)
  49     (setq coding-system buffer-file-coding-system)
  50     (infohack-remove-unsupported)
  51     (texinfo-every-node-update)
  52     (texinfo-format-buffer t) ;; Don't save any file.
  53     (setq default-directory dest-directory)
  54     (setq buffer-file-name
  55           (expand-file-name (file-name-nondirectory buffer-file-name)
  56                             default-directory))
  57     (setq buffer-file-coding-system coding-system)
  58     (if (> (buffer-size) 100000)
  59         (Info-split))
  60     (save-buffer)))
  61
  62 (eval-and-compile
  63   (when (string-match "windows-nt\\|os/2\\|emx\\|cygwin"
  64                       (symbol-name system-type))
  65     (defun subst-char-in-region (START END FROMCHAR TOCHAR &optional NOUNDO)
  66       "From START to END, replace FROMCHAR with TOCHAR each time it occurs.
  67 If optional arg NOUNDO is non-nil, don't record this change for undo
  68 and don't mark the buffer as really changed.
  69 Both characters must have the same length of multi-byte form."
  70       (let ((original-buffer-undo-list buffer-undo-list)
  71             (modified (buffer-modified-p)))
  72         (if NOUNDO
  73             (setq buffer-undo-list t))
  74         (goto-char START)
  75         (let ((from (char-to-string FROMCHAR))
  76               (to (char-to-string TOCHAR)))
  77           (while (search-forward from END t)
  78             (replace-match to t t)))
  79         (if NOUNDO
  80             (progn (setq buffer-undo-list original-buffer-undo-list)
  81                    (set-buffer-modidifed-p modified)))))))
  82
  83 (defun batch-makeinfo ()
  84   "Emacs makeinfo in batch mode."
  85   (infohack-texi-format (car command-line-args-left)
  86                         (car (cdr command-line-args-left)))
  87   (setq command-line-args-left nil))
  88
  89 \f
  90 (require 'bytecomp)
  91
  92 ;; Reduce the number of split Info files.
  93 (require 'informat)
  94 (let* ((fn (symbol-function 'Info-split))
  95        (fns (prin1-to-string fn)))
  96   (when (string-match "\\([\t\n ]+\\)50000\\([\t\n ]+\\)" fns)
  97     (condition-case nil
  98         (fset 'Info-split (read (replace-match "\\1200000\\2" nil nil fns)))
  99       (error
 100        (fset 'Info-split fn)))))
 101
 102 (defun infohack-texi-format (file &optional addsuffix)
 103   (let ((auto-save-default nil)
 104         (find-file-run-dired nil)
 105         coding-system-for-write
 106         (error 0))
 107     (condition-case err
 108         (progn
 109           (find-file file)
 110           (setq buffer-read-only nil)
 111           (buffer-disable-undo (current-buffer))
 112           (setq coding-system-for-write buffer-file-coding-system)
 113           ;; process @include before updating node
 114           ;; This might produce some problem if we use @lowersection or
 115           ;; such.
 116           (let ((input-directory default-directory)
 117                 (texinfo-command-end))
 118             (while (re-search-forward "^@include" nil t)
 119               (setq texinfo-command-end (point))
 120               (let ((filename (concat input-directory
 121                                       (texinfo-parse-line-arg))))
 122                 (re-search-backward "^@include")
 123                 (delete-region (point) (save-excursion
 124                                          (forward-line 1)
 125                                          (point)))
 126                 (message "Reading included file: %s" filename)
 127                 (save-excursion
 128                   (save-restriction
 129                     (narrow-to-region
 130                      (point) (+ (point)
 131                                 (car (cdr (insert-file-contents filename)))))
 132                     (goto-char (point-min))
 133                     ;; Remove `@setfilename' line from included file,
 134                     ;; if any, so @setfilename command not duplicated.
 135                     (if (re-search-forward "^@setfilename"
 136                                            (save-excursion
 137                                              (forward-line 100)
 138                                              (point))
 139                                            t)
 140                         (progn
 141                           (beginning-of-line)
 142                           (delete-region (point) (save-excursion
 143                                                    (forward-line 1)
 144                                                    (point))))))))))
 145           ;; Remove ignored areas.
 146           (goto-char (point-min))
 147           (while (re-search-forward "^@ignore[\t\r ]*$" nil t)
 148             (delete-region (match-beginning 0)
 149                            (if (re-search-forward
 150                                 "^@end[\t ]+ignore[\t\r ]*$" nil t)
 151                                (1+ (match-end 0))
 152                              (point-max))))
 153           ;; Remove unsupported commands.
 154           (infohack-remove-unsupported)
 155           ;; Add suffix if it is needed.
 156           (goto-char (point-min))
 157           (when (and addsuffix
 158                      (re-search-forward "^@setfilename[\t ]+\\([^\t\n ]+\\)"
 159                                         nil t)
 160                      (not (string-match "\\.info$" (match-string 1))))
 161             (insert ".info"))
 162           (texinfo-mode)
 163           (texinfo-every-node-update)
 164           (set-buffer-modified-p nil)
 165           (message "texinfo formatting %s..." file)
 166           (let ((si:message (symbol-function 'message)))
 167             ;; Encode messages to terminal.
 168             (fset
 169              'message
 170              (byte-compile
 171               (if (featurep 'xemacs)
 172                   `(lambda (fmt &rest args)
 173                      (unless (and (string-equal fmt "%s clean")
 174                                   (equal (car args) buffer-file-name))
 175                        (funcall ,si:message "%s"
 176                                 (encode-coding-string (apply 'format fmt args)
 177                                                       'iso-2022-7bit))))
 178                 `(lambda (fmt &rest args)
 179                    (funcall ,si:message "%s"
 180                             (encode-coding-string (apply 'format fmt args)
 181                                                   'iso-2022-7bit))))))
 182             (unwind-protect
 183                 (texinfo-format-buffer nil)
 184               (fset 'message si:message)))
 185           (if (buffer-modified-p)
 186               (progn (message "Saving modified %s" (buffer-file-name))
 187                      (save-buffer))))
 188       (error
 189        (message ">> Error: %s" (prin1-to-string err))
 190        (message ">>  point at")
 191        (let ((s (buffer-substring (point) (min (+ (point) 100) (point-max))))
 192              (tem 0))
 193          (while (setq tem (string-match "\n+" s tem))
 194            (setq s (concat (substring s 0 (match-beginning 0))
 195                            "\n>>  "
 196                            (substring s (match-end 0)))
 197                  tem (1+ tem)))
 198          (message ">>  %s" s))
 199        (setq error 1)))
 200     (kill-emacs error)))
 201
 202 ;;; infohack.el ends here