lisp/informat.el

   1 ;;; informat.el --- info support functions package for Emacs
   2
   3 ;; Copyright (C) 1986 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: help
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;; Nowadays, the Texinfo formatting commands always tagify a buffer
  28 ;; (as does `makeinfo') since @anchor commands need tag tables.
  29
  30 ;;; Code:
  31
  32 (require 'info)
  33
  34 ;;;###autoload
  35 (defun Info-tagify (&optional input-buffer-name)
  36   "Create or update Info file tag table in current buffer or in a region."
  37   (interactive)
  38   ;; Save and restore point and restrictions.
  39   ;; save-restrictions would not work
  40   ;; because it records the old max relative to the end.
  41   ;; We record it relative to the beginning.
  42   (if input-buffer-name
  43       (message "Tagifying region in %s ..." input-buffer-name)
  44       (message
  45        "Tagifying %s ..."  (file-name-nondirectory (buffer-file-name))))
  46   (let ((omin (point-min))
  47         (omax (point-max))
  48         (nomax (= (point-max) (1+ (buffer-size))))
  49         (opoint (point)))
  50     (unwind-protect
  51     (progn
  52       (widen)
  53       (goto-char (point-min))
  54       (if (search-forward "\^_\nIndirect:\n" nil t)
  55           (message
  56            "Cannot tagify split info file.  Run this before splitting.")
  57         (let (tag-list
  58               refillp
  59               (case-fold-search t)
  60               (regexp
  61                (concat
  62                 "\\("
  63
  64
  65                 "\\("
  66                 "@anchor"        ; match-string 2 matches @anchor
  67                 "\\)"
  68                 "\\(-no\\|-yes\\)"  ; match-string 3 matches -no or -yes
  69                 "\\("
  70                 "-refill"
  71                 "\\)"
  72
  73                 "\\("
  74                 "{"
  75                 "\\)"
  76                 "\\("
  77                 "[^}]+"          ; match-string 6 matches arg to anchor
  78                 "\\)"
  79                 "\\("
  80                 "}"
  81                 "\\)"
  82
  83                 "\\|"
  84
  85                 "\\("
  86                 "\n\^_\\(\^L\\)?"
  87                 "\\)"
  88
  89                 "\\("
  90                 "\n\\(File:[ \t]*\\([^,\n\t]*\\)[,\t\n]+[ \t\n]*\\)?"
  91                 "Node:[ \t]*"
  92                 "\\("
  93                 "[^,\n\t]*"      ; match-string 13 matches arg to node name
  94                 "\\)"
  95                 "[,\t\n]"
  96                 "\\)"
  97
  98                 "\\)"
  99                 )))
 100           (while (re-search-forward regexp nil t)
 101             (if (string-equal "@anchor" (match-string 2))
 102                 (progn
 103                   ;; kludge lest lose match-data
 104                   (if (string-equal "-yes" (match-string 3))
 105                       (setq refillp t))
 106                   (setq tag-list
 107                         (cons (list
 108                                (concat "Ref: " (match-string 6))
 109                                (match-beginning 0))
 110                               tag-list))
 111                   (if (eq refillp t)
 112                       ;; set start and end so texinfo-format-refill works
 113                       (let ((texinfo-command-start (match-beginning 0))
 114                             (texinfo-command-end (match-end 0)))
 115                         (texinfo-format-refill))
 116                   (delete-region  (match-beginning 0) (match-end 0))))
 117               ;; else this is a Node
 118               (setq tag-list
 119                     (cons (list
 120                            (concat "Node: " (match-string-no-properties 13))
 121                            (1+ (match-beginning 10)))
 122                           tag-list))))
 123
 124               (goto-char (point-max))
 125               (forward-line -8)
 126               (let ((buffer-read-only nil))
 127                 (if (search-forward "\^_\nEnd tag table\n" nil t)
 128                     (let ((end (point)))
 129                       (search-backward "\nTag table:\n")
 130                       (beginning-of-line)
 131                       (delete-region (point) end)))
 132                 (goto-char (point-max))
 133                 (or (bolp)
 134                     (newline))
 135                 (insert "\^_\f\nTag table:\n")
 136                 (if (eq major-mode 'info-mode)
 137                     (move-marker Info-tag-table-marker (point)))
 138                 (setq tag-list (nreverse tag-list))
 139                 (while tag-list
 140                   (insert (car (car tag-list)) ?\177)
 141                   (princ (car (cdr (car tag-list))) (current-buffer))
 142                   (insert ?\n)
 143                   (setq tag-list (cdr tag-list)))
 144                 (insert "\^_\nEnd tag table\n")))))
 145       (goto-char opoint)
 146       (narrow-to-region omin (if nomax (1+ (buffer-size))
 147                                (min omax (point-max))))))
 148   (if input-buffer-name
 149       (message "Tagifying region in %s done" input-buffer-name)
 150       (message
 151        "Tagifying %s done"  (file-name-nondirectory (buffer-file-name)))))
 152
 153 \f
 154 ;;;###autoload
 155 (defun Info-split ()
 156   "Split an info file into an indirect file plus bounded-size subfiles.
 157 Each subfile will be up to 50,000 characters plus one node.
 158
 159 To use this command, first visit a large Info file that has a tag
 160 table.  The buffer is modified into a (small) indirect info file which
 161 should be saved in place of the original visited file.
 162
 163 The subfiles are written in the same directory the original file is
 164 in, with names generated by appending `-' and a number to the original
 165 file name.  The indirect file still functions as an Info file, but it
 166 contains just the tag table and a directory of subfiles."
 167
 168   (interactive)
 169   (if (< (buffer-size) 70000)
 170       (error "This is too small to be worth splitting"))
 171   (goto-char (point-min))
 172   (search-forward "\^_")
 173   (forward-char -1)
 174   (let ((start (point))
 175         (chars-deleted 0)
 176         subfiles
 177         (subfile-number 1)
 178         (case-fold-search t)
 179         (filename (file-name-sans-versions buffer-file-name)))
 180     (goto-char (point-max))
 181     (forward-line -8)
 182     (setq buffer-read-only nil)
 183     (or (search-forward "\^_\nEnd tag table\n" nil t)
 184         (error "Tag table required; use M-x Info-tagify"))
 185     (search-backward "\nTag table:\n")
 186     (if (looking-at "\nTag table:\n\^_")
 187         (error "Tag table is just a skeleton; use M-x Info-tagify"))
 188     (beginning-of-line)
 189     (forward-char 1)
 190     (save-restriction
 191       (narrow-to-region (point-min) (point))
 192       (goto-char (point-min))
 193       (while (< (1+ (point)) (point-max))
 194         (goto-char (min (+ (point) 50000) (point-max)))
 195         (search-forward "\^_" nil 'move)
 196         (setq subfiles
 197               (cons (list (+ start chars-deleted)
 198                           (concat (file-name-nondirectory filename)
 199                                   (format "-%d" subfile-number)))
 200                     subfiles))
 201         ;; Put a newline at end of split file, to make Unix happier.
 202         (insert "\n")
 203         (write-region (point-min) (point)
 204                       (concat filename (format "-%d" subfile-number)))
 205         (delete-region (1- (point)) (point))
 206         ;; Back up over the final ^_.
 207         (forward-char -1)
 208         (setq chars-deleted (+ chars-deleted (- (point) start)))
 209         (delete-region start (point))
 210         (setq subfile-number (1+ subfile-number))))
 211     (while subfiles
 212       (goto-char start)
 213       (insert (nth 1 (car subfiles))
 214               (format ": %d" (1- (car (car subfiles))))
 215               "\n")
 216       (setq subfiles (cdr subfiles)))
 217     (goto-char start)
 218     (insert "\^_\nIndirect:\n")
 219     (search-forward "\nTag Table:\n")
 220     (insert "(Indirect)\n")))
 221 \f
 222 (defvar Info-validate-allnodes)
 223 (defvar Info-validate-thisnode)
 224 (defvar Info-validate-lossages)
 225
 226 ;;;###autoload
 227 (defun Info-validate ()
 228   "Check current buffer for validity as an Info file.
 229 Check that every node pointer points to an existing node."
 230   (interactive)
 231   (save-excursion
 232     (save-restriction
 233       (widen)
 234       (goto-char (point-min))
 235       (if (search-forward "\nTag table:\n(Indirect)\n" nil t)
 236           (error "Don't yet know how to validate indirect info files: \"%s\""
 237                  (buffer-name (current-buffer))))
 238       (goto-char (point-min))
 239       (let ((Info-validate-allnodes '(("*")))
 240             (regexp "Node:[ \t]*\\([^,\n\t]*\\)[,\t\n]")
 241             (case-fold-search t)
 242             (tags-losing nil)
 243             (Info-validate-lossages ()))
 244         (while (search-forward "\n\^_" nil t)
 245           (forward-line 1)
 246           (let ((beg (point)))
 247             (forward-line 1)
 248             (if (re-search-backward regexp beg t)
 249                 (let ((name (downcase
 250                              (buffer-substring-no-properties
 251                               (match-beginning 1)
 252                               (progn
 253                                 (goto-char (match-end 1))
 254                                 (skip-chars-backward " \t")
 255                                 (point))))))
 256                   (if (assoc name Info-validate-allnodes)
 257                       (setq Info-validate-lossages
 258                             (cons (list name "Duplicate node-name" nil)
 259                                   Info-validate-lossages))
 260                     (setq Info-validate-allnodes
 261                           (cons (list name
 262                                       (progn
 263                                         (end-of-line)
 264                                         (and (re-search-backward
 265                                               "prev[ious]*:" beg t)
 266                                              (progn
 267                                                (goto-char (match-end 0))
 268                                                (downcase
 269                                                 (Info-following-node-name)))))
 270                                       beg)
 271                                 Info-validate-allnodes)))))))
 272         (goto-char (point-min))
 273         (while (search-forward "\n\^_" nil t)
 274           (forward-line 1)
 275           (let ((beg (point))
 276                 Info-validate-thisnode next)
 277             (forward-line 1)
 278             (if (re-search-backward regexp beg t)
 279                 (save-restriction
 280                   (let ((md (match-data)))
 281                     (search-forward "\n\^_" nil 'move)
 282                     (narrow-to-region beg (point))
 283                     (set-match-data md))
 284                   (setq Info-validate-thisnode (downcase
 285                                                 (buffer-substring-no-properties
 286                                                  (match-beginning 1)
 287                                                  (progn
 288                                                    (goto-char (match-end 1))
 289                                                    (skip-chars-backward " \t")
 290                                                    (point)))))
 291                   (end-of-line)
 292                   (and (search-backward "next:" nil t)
 293                        (setq next (Info-validate-node-name "invalid Next"))
 294                        (assoc next Info-validate-allnodes)
 295                        (if (equal (car (cdr (assoc next Info-validate-allnodes)))
 296                                   Info-validate-thisnode)
 297                            ;; allow multiple `next' pointers to one node
 298                            (let ((tem Info-validate-lossages))
 299                              (while tem
 300                                (if (and (equal (car (cdr (car tem)))
 301                                                "should have Previous")
 302                                         (equal (car (car tem))
 303                                                next))
 304                                    (setq Info-validate-lossages
 305                                          (delq (car tem) Info-validate-lossages)))
 306                                (setq tem (cdr tem))))
 307                          (setq Info-validate-lossages
 308                                (cons (list next
 309                                            "should have Previous"
 310                                            Info-validate-thisnode)
 311                                      Info-validate-lossages))))
 312                   (end-of-line)
 313                   (if (re-search-backward "prev[ious]*:" nil t)
 314                       (Info-validate-node-name "invalid Previous"))
 315                   (end-of-line)
 316                   (if (search-backward "up:" nil t)
 317                       (Info-validate-node-name "invalid Up"))
 318                   (if (re-search-forward "\n* Menu:" nil t)
 319                       (while (re-search-forward "\n\\* " nil t)
 320                         (Info-validate-node-name
 321                          (concat "invalid menu item "
 322                                  (buffer-substring (point)
 323                                                    (save-excursion
 324                                                      (skip-chars-forward "^:")
 325                                                      (point))))
 326                          (Info-extract-menu-node-name))))
 327                   (goto-char (point-min))
 328                   (while (re-search-forward "\\*note[ \n]*[^:\t]*:" nil t)
 329                     (goto-char (+ (match-beginning 0) 5))
 330                     (skip-chars-forward " \n")
 331                     (Info-validate-node-name
 332                      (concat "invalid reference "
 333                              (buffer-substring (point)
 334                                                (save-excursion
 335                                                  (skip-chars-forward "^:")
 336                                                  (point))))
 337                      (Info-extract-menu-node-name "Bad format cross-reference")))))))
 338         (setq tags-losing (not (Info-validate-tags-table)))
 339         (if (or Info-validate-lossages tags-losing)
 340             (with-output-to-temp-buffer " *problems in info file*"
 341               (while Info-validate-lossages
 342                 (princ "In node \"")
 343                 (princ (car (car Info-validate-lossages)))
 344                 (princ "\", ")
 345                 (let ((tem (nth 1 (car Info-validate-lossages))))
 346                   (cond ((string-match "\n" tem)
 347                          (princ (substring tem 0 (match-beginning 0)))
 348                          (princ "..."))
 349                         (t
 350                          (princ tem))))
 351                 (if (nth 2 (car Info-validate-lossages))
 352                     (progn
 353                       (princ ": ")
 354                       (let ((tem (nth 2 (car Info-validate-lossages))))
 355                         (cond ((string-match "\n" tem)
 356                                (princ (substring tem 0 (match-beginning 0)))
 357                                (princ "..."))
 358                               (t
 359                                (princ tem))))))
 360                 (terpri)
 361                 (setq Info-validate-lossages (cdr Info-validate-lossages)))
 362               (if tags-losing (princ "\nTags table must be recomputed\n")))
 363           ;; Here if info file is valid.
 364           ;; If we already made a list of problems, clear it out.
 365           (save-excursion
 366             (if (get-buffer " *problems in info file*")
 367                 (progn
 368                   (set-buffer " *problems in info file*")
 369                   (kill-buffer (current-buffer)))))
 370           (message "File appears valid"))))))
 371
 372 (defun Info-validate-node-name (kind &optional name)
 373   (if name
 374       nil
 375     (goto-char (match-end 0))
 376     (skip-chars-forward " \t")
 377     (if (= (following-char) ?\()
 378         nil
 379       (setq name
 380             (buffer-substring-no-properties
 381              (point)
 382              (progn
 383                (skip-chars-forward "^,\t\n")
 384                (skip-chars-backward " ")
 385                (point))))))
 386   (if (null name)
 387       nil
 388     (setq name (downcase name))
 389     (or (and (> (length name) 0) (= (aref name 0) ?\())
 390         (assoc name Info-validate-allnodes)
 391         (setq Info-validate-lossages
 392               (cons (list Info-validate-thisnode kind name)
 393                     Info-validate-lossages))))
 394   name)
 395
 396 (defun Info-validate-tags-table ()
 397   (goto-char (point-min))
 398   (if (not (search-forward "\^_\nEnd tag table\n" nil t))
 399       t
 400     (not (catch 'losing
 401            (let* ((end (match-beginning 0))
 402                   (start (progn (search-backward "\nTag table:\n")
 403                                 (1- (match-end 0))))
 404                   tem)
 405              (setq tem Info-validate-allnodes)
 406              (while tem
 407                (goto-char start)
 408                (or (equal (car (car tem)) "*")
 409                    (search-forward (concat "Node: "
 410                                            (car (car tem))
 411                                            "\177")
 412                                    end t)
 413                    (throw 'losing 'x))
 414                (setq tem (cdr tem)))
 415              (goto-char (1+ start))
 416              (while (looking-at ".*Node: \\(.*\\)\177\\([0-9]+\\)$")
 417                (setq tem (downcase (buffer-substring-no-properties
 418                                      (match-beginning 1)
 419                                      (match-end 1))))
 420                (setq tem (assoc tem Info-validate-allnodes))
 421                (if (or (not tem)
 422                        (< 1000 (progn
 423                                  (goto-char (match-beginning 2))
 424                                  (setq tem (- (car (cdr (cdr tem)))
 425                                               (read (current-buffer))))
 426                                  (if (> tem 0) tem (- tem)))))
 427                    (throw 'losing 'y))
 428                (forward-line 1)))
 429            (if (looking-at "\^_\n")
 430                (forward-line 1))
 431            (or (looking-at "End tag table\n")
 432                (throw 'losing 'z))
 433            nil))))
 434 \f
 435 ;;;###autoload
 436 (defun batch-info-validate ()
 437   "Runs `Info-validate' on the files remaining on the command line.
 438 Must be used only with -batch, and kills Emacs on completion.
 439 Each file will be processed even if an error occurred previously.
 440 For example, invoke \"emacs -batch -f batch-info-validate $info/ ~/*.info\""
 441   (if (not noninteractive)
 442       (error "batch-info-validate may only be used -batch"))
 443   (let ((version-control t)
 444         (auto-save-default nil)
 445         (find-file-run-dired nil)
 446         (kept-old-versions 259259)
 447         (kept-new-versions 259259))
 448     (let ((error 0)
 449           file
 450           (files ()))
 451       (while command-line-args-left
 452         (setq file (expand-file-name (car command-line-args-left)))
 453         (cond ((not (file-exists-p file))
 454                (message ">> %s does not exist!" file)
 455                (setq error 1
 456                      command-line-args-left (cdr command-line-args-left)))
 457               ((file-directory-p file)
 458                (setq command-line-args-left (nconc (directory-files file)
 459                                               (cdr command-line-args-left))))
 460               (t
 461                (setq files (cons file files)
 462                      command-line-args-left (cdr command-line-args-left)))))
 463       (while files
 464         (setq file (car files)
 465               files (cdr files))
 466         (let ((lose nil))
 467           (condition-case err
 468               (progn
 469                 (if buffer-file-name (kill-buffer (current-buffer)))
 470                 (find-file file)
 471                 (buffer-disable-undo (current-buffer))
 472                 (set-buffer-modified-p nil)
 473                 (fundamental-mode)
 474                 (let ((case-fold-search nil))
 475                   (goto-char (point-max))
 476                   (cond ((search-backward "\n\^_\^L\nTag table:\n" nil t)
 477                          (message "%s already tagified" file))
 478                         ((< (point-max) 30000)
 479                          (message "%s too small to bother tagifying" file))
 480                         (t
 481                          (Info-tagify))))
 482                 (let ((loss-name " *problems in info file*"))
 483                   (message "Checking validity of info file %s..." file)
 484                   (if (get-buffer loss-name)
 485                       (kill-buffer loss-name))
 486                   (Info-validate)
 487                   (if (not (get-buffer loss-name))
 488                       nil ;(message "Checking validity of info file %s... OK" file)
 489                     (message "----------------------------------------------------------------------")
 490                     (message ">> PROBLEMS IN INFO FILE %s" file)
 491                     (save-excursion
 492                       (set-buffer loss-name)
 493                       (princ (buffer-substring-no-properties
 494                               (point-min) (point-max))))
 495                     (message "----------------------------------------------------------------------")
 496                     (setq error 1 lose t)))
 497                 (if (and (buffer-modified-p)
 498                          (not lose))
 499                     (progn (message "Saving modified %s" file)
 500                            (save-buffer))))
 501             (error (message ">> Error: %s" (prin1-to-string err))))))
 502       (kill-emacs error))))
 503
 504 (provide 'informat)
 505
 506 ;;; informat.el ends here