439 lines
14 KiB
EmacsLisp
439 lines
14 KiB
EmacsLisp
;;; informat.el --- info support functions package for Emacs
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;; Copyright (C) 1986 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: help
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Code:
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(require 'info)
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;;;###autoload
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(defun Info-tagify ()
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"Create or update Info-file tag table in current buffer."
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(interactive)
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;; Save and restore point and restrictions.
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;; save-restrictions would not work
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;; because it records the old max relative to the end.
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;; We record it relative to the beginning.
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(message "Tagifying %s ..." (file-name-nondirectory (buffer-file-name)))
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(let ((omin (point-min))
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(omax (point-max))
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(nomax (= (point-max) (1+ (buffer-size))))
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(opoint (point)))
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(unwind-protect
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(progn
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(widen)
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(goto-char (point-min))
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(if (search-forward "\^_\nIndirect:\n" nil t)
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(message "Cannot tagify split info file")
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(let ((regexp "Node:[ \t]*\\([^,\n\t]*\\)[,\t\n]")
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(case-fold-search t)
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list)
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(while (search-forward "\n\^_" nil t)
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;; We want the 0-origin character position of the ^_.
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;; That is the same as the Emacs (1-origin) position
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;; of the newline before it.
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(let ((beg (match-beginning 0)))
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(forward-line 2)
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(if (re-search-backward regexp beg t)
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(setq list
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(cons (list (buffer-substring-no-properties
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(match-beginning 1)
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(match-end 1))
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beg)
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list)))))
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(goto-char (point-max))
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(forward-line -8)
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(let ((buffer-read-only nil))
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(if (search-forward "\^_\nEnd tag table\n" nil t)
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(let ((end (point)))
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(search-backward "\nTag table:\n")
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(beginning-of-line)
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(delete-region (point) end)))
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(goto-char (point-max))
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(insert "\^_\f\nTag table:\n")
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(if (eq major-mode 'info-mode)
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(move-marker Info-tag-table-marker (point)))
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(setq list (nreverse list))
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(while list
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(insert "Node: " (car (car list)) ?\177)
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(princ (car (cdr (car list))) (current-buffer))
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(insert ?\n)
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(setq list (cdr list)))
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(insert "\^_\nEnd tag table\n")))))
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(goto-char opoint)
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(narrow-to-region omin (if nomax (1+ (buffer-size))
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(min omax (point-max))))))
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(message "Tagifying %s ... done" (file-name-nondirectory (buffer-file-name))))
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;;;###autoload
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(defun Info-split ()
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"Split an info file into an indirect file plus bounded-size subfiles.
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Each subfile will be up to 50,000 characters plus one node.
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To use this command, first visit a large Info file that has a tag
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table. The buffer is modified into a (small) indirect info file which
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should be saved in place of the original visited file.
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The subfiles are written in the same directory the original file is
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in, with names generated by appending `-' and a number to the original
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file name. The indirect file still functions as an Info file, but it
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contains just the tag table and a directory of subfiles."
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(interactive)
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(if (< (buffer-size) 70000)
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(error "This is too small to be worth splitting"))
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(goto-char (point-min))
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(search-forward "\^_")
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(forward-char -1)
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(let ((start (point))
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(chars-deleted 0)
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subfiles
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(subfile-number 1)
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(case-fold-search t)
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(filename (file-name-sans-versions buffer-file-name)))
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(goto-char (point-max))
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(forward-line -8)
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(setq buffer-read-only nil)
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(or (search-forward "\^_\nEnd tag table\n" nil t)
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(error "Tag table required; use M-x Info-tagify"))
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(search-backward "\nTag table:\n")
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(if (looking-at "\nTag table:\n\^_")
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(error "Tag table is just a skeleton; use M-x Info-tagify"))
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(beginning-of-line)
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(forward-char 1)
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(save-restriction
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(narrow-to-region (point-min) (point))
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(goto-char (point-min))
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(while (< (1+ (point)) (point-max))
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(goto-char (min (+ (point) 50000) (point-max)))
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(search-forward "\^_" nil 'move)
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(setq subfiles
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(cons (list (+ start chars-deleted)
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(concat (file-name-nondirectory filename)
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(format "-%d" subfile-number)))
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subfiles))
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;; Put a newline at end of split file, to make Unix happier.
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(insert "\n")
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(write-region (point-min) (point)
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(concat filename (format "-%d" subfile-number)))
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(delete-region (1- (point)) (point))
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;; Back up over the final ^_.
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(forward-char -1)
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(setq chars-deleted (+ chars-deleted (- (point) start)))
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(delete-region start (point))
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(setq subfile-number (1+ subfile-number))))
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(while subfiles
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(goto-char start)
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(insert (nth 1 (car subfiles))
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(format ": %d" (1- (car (car subfiles))))
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"\n")
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(setq subfiles (cdr subfiles)))
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(goto-char start)
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(insert "\^_\nIndirect:\n")
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(search-forward "\nTag Table:\n")
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(insert "(Indirect)\n")))
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(defvar Info-validate-allnodes)
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(defvar Info-validate-thisnode)
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(defvar Info-validate-lossages)
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;;;###autoload
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(defun Info-validate ()
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"Check current buffer for validity as an Info file.
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Check that every node pointer points to an existing node."
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(interactive)
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(save-excursion
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(save-restriction
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(widen)
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(goto-char (point-min))
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(if (search-forward "\nTag table:\n(Indirect)\n" nil t)
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(error "Don't yet know how to validate indirect info files: \"%s\""
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(buffer-name (current-buffer))))
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(goto-char (point-min))
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(let ((Info-validate-allnodes '(("*")))
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(regexp "Node:[ \t]*\\([^,\n\t]*\\)[,\t\n]")
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(case-fold-search t)
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(tags-losing nil)
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(Info-validate-lossages ()))
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(while (search-forward "\n\^_" nil t)
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(forward-line 1)
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(let ((beg (point)))
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(forward-line 1)
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(if (re-search-backward regexp beg t)
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(let ((name (downcase
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(buffer-substring-no-properties
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(match-beginning 1)
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(progn
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(goto-char (match-end 1))
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(skip-chars-backward " \t")
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(point))))))
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(if (assoc name Info-validate-allnodes)
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(setq Info-validate-lossages
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(cons (list name "Duplicate node-name" nil)
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Info-validate-lossages))
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(setq Info-validate-allnodes
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(cons (list name
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(progn
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(end-of-line)
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(and (re-search-backward
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"prev[ious]*:" beg t)
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(progn
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(goto-char (match-end 0))
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(downcase
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(Info-following-node-name)))))
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beg)
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Info-validate-allnodes)))))))
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(goto-char (point-min))
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(while (search-forward "\n\^_" nil t)
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(forward-line 1)
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(let ((beg (point))
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Info-validate-thisnode next)
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(forward-line 1)
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(if (re-search-backward regexp beg t)
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(save-restriction
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(search-forward "\n\^_" nil 'move)
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(narrow-to-region beg (point))
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(setq Info-validate-thisnode (downcase
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(buffer-substring-no-properties
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(match-beginning 1)
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(progn
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(goto-char (match-end 1))
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(skip-chars-backward " \t")
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(point)))))
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(end-of-line)
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(and (search-backward "next:" nil t)
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(setq next (Info-validate-node-name "invalid Next"))
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(assoc next Info-validate-allnodes)
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(if (equal (car (cdr (assoc next Info-validate-allnodes)))
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Info-validate-thisnode)
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;; allow multiple `next' pointers to one node
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(let ((tem Info-validate-lossages))
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(while tem
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(if (and (equal (car (cdr (car tem)))
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"should have Previous")
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(equal (car (car tem))
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next))
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(setq Info-validate-lossages
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(delq (car tem) Info-validate-lossages)))
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(setq tem (cdr tem))))
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(setq Info-validate-lossages
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(cons (list next
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"should have Previous"
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Info-validate-thisnode)
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Info-validate-lossages))))
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(end-of-line)
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(if (re-search-backward "prev[ious]*:" nil t)
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(Info-validate-node-name "invalid Previous"))
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(end-of-line)
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(if (search-backward "up:" nil t)
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(Info-validate-node-name "invalid Up"))
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(if (re-search-forward "\n* Menu:" nil t)
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(while (re-search-forward "\n\\* " nil t)
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(Info-validate-node-name
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(concat "invalid menu item "
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(buffer-substring (point)
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(save-excursion
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(skip-chars-forward "^:")
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(point))))
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(Info-extract-menu-node-name))))
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(goto-char (point-min))
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(while (re-search-forward "\\*note[ \n]*[^:\t]*:" nil t)
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(goto-char (+ (match-beginning 0) 5))
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(skip-chars-forward " \n")
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(Info-validate-node-name
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(concat "invalid reference "
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(buffer-substring (point)
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(save-excursion
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(skip-chars-forward "^:")
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(point))))
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(Info-extract-menu-node-name "Bad format cross-reference")))))))
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(setq tags-losing (not (Info-validate-tags-table)))
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(if (or Info-validate-lossages tags-losing)
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(with-output-to-temp-buffer " *problems in info file*"
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(while Info-validate-lossages
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(princ "In node \"")
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(princ (car (car Info-validate-lossages)))
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(princ "\", ")
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(let ((tem (nth 1 (car Info-validate-lossages))))
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(cond ((string-match "\n" tem)
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(princ (substring tem 0 (match-beginning 0)))
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(princ "..."))
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(t
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(princ tem))))
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(if (nth 2 (car Info-validate-lossages))
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(progn
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(princ ": ")
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(let ((tem (nth 2 (car Info-validate-lossages))))
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(cond ((string-match "\n" tem)
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(princ (substring tem 0 (match-beginning 0)))
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(princ "..."))
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(t
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(princ tem))))))
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(terpri)
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(setq Info-validate-lossages (cdr Info-validate-lossages)))
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(if tags-losing (princ "\nTags table must be recomputed\n")))
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;; Here if info file is valid.
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;; If we already made a list of problems, clear it out.
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(save-excursion
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(if (get-buffer " *problems in info file*")
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(progn
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(set-buffer " *problems in info file*")
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(kill-buffer (current-buffer)))))
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(message "File appears valid"))))))
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(defun Info-validate-node-name (kind &optional name)
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(if name
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nil
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(goto-char (match-end 0))
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(skip-chars-forward " \t")
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(if (= (following-char) ?\()
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nil
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(setq name
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(buffer-substring-no-properties
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(point)
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(progn
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(skip-chars-forward "^,\t\n")
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(skip-chars-backward " ")
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(point))))))
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(if (null name)
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nil
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(setq name (downcase name))
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(or (and (> (length name) 0) (= (aref name 0) ?\())
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(assoc name Info-validate-allnodes)
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(setq Info-validate-lossages
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(cons (list Info-validate-thisnode kind name)
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Info-validate-lossages))))
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name)
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(defun Info-validate-tags-table ()
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(goto-char (point-min))
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(if (not (search-forward "\^_\nEnd tag table\n" nil t))
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t
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(not (catch 'losing
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(let* ((end (match-beginning 0))
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(start (progn (search-backward "\nTag table:\n")
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(1- (match-end 0))))
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tem)
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(setq tem Info-validate-allnodes)
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(while tem
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(goto-char start)
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(or (equal (car (car tem)) "*")
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(search-forward (concat "Node: "
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(car (car tem))
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"\177")
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end t)
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(throw 'losing 'x))
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(setq tem (cdr tem)))
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(goto-char (1+ start))
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(while (looking-at ".*Node: \\(.*\\)\177\\([0-9]+\\)$")
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(setq tem (downcase (buffer-substring-no-properties
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(match-beginning 1)
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(match-end 1))))
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(setq tem (assoc tem Info-validate-allnodes))
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(if (or (not tem)
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(< 1000 (progn
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(goto-char (match-beginning 2))
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(setq tem (- (car (cdr (cdr tem)))
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(read (current-buffer))))
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(if (> tem 0) tem (- tem)))))
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(throw 'losing 'y))
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(forward-line 1)))
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(if (looking-at "\^_\n")
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(forward-line 1))
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(or (looking-at "End tag table\n")
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(throw 'losing 'z))
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nil))))
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;;;###autoload
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(defun batch-info-validate ()
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"Runs `Info-validate' on the files remaining on the command line.
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Must be used only with -batch, and kills Emacs on completion.
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Each file will be processed even if an error occurred previously.
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For example, invoke \"emacs -batch -f batch-info-validate $info/ ~/*.info\""
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(if (not noninteractive)
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(error "batch-info-validate may only be used -batch."))
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(let ((version-control t)
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(auto-save-default nil)
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(find-file-run-dired nil)
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(kept-old-versions 259259)
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(kept-new-versions 259259))
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(let ((error 0)
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file
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(files ()))
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(while command-line-args-left
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(setq file (expand-file-name (car command-line-args-left)))
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(cond ((not (file-exists-p file))
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(message ">> %s does not exist!" file)
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(setq error 1
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command-line-args-left (cdr command-line-args-left)))
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((file-directory-p file)
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(setq command-line-args-left (nconc (directory-files file)
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(cdr command-line-args-left))))
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(t
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(setq files (cons file files)
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command-line-args-left (cdr command-line-args-left)))))
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(while files
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(setq file (car files)
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files (cdr files))
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(let ((lose nil))
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(condition-case err
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(progn
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(if buffer-file-name (kill-buffer (current-buffer)))
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(find-file file)
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(buffer-disable-undo (current-buffer))
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(set-buffer-modified-p nil)
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(fundamental-mode)
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(let ((case-fold-search nil))
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(goto-char (point-max))
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(cond ((search-backward "\n\^_\^L\nTag table:\n" nil t)
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(message "%s already tagified" file))
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((< (point-max) 30000)
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(message "%s too small to bother tagifying" file))
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(t
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(Info-tagify))))
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(let ((loss-name " *problems in info file*"))
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(message "Checking validity of info file %s..." file)
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(if (get-buffer loss-name)
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(kill-buffer loss-name))
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(Info-validate)
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(if (not (get-buffer loss-name))
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nil ;(message "Checking validity of info file %s... OK" file)
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(message "----------------------------------------------------------------------")
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(message ">> PROBLEMS IN INFO FILE %s" file)
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(save-excursion
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(set-buffer loss-name)
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(princ (buffer-substring-no-properties
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(point-min) (point-max))))
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(message "----------------------------------------------------------------------")
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(setq error 1 lose t)))
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(if (and (buffer-modified-p)
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(not lose))
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(progn (message "Saving modified %s" file)
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(save-buffer))))
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(error (message ">> Error: %s" (prin1-to-string err))))))
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(kill-emacs error))))
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(provide 'informat)
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;;; informat.el ends here
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