lisp/informat.el

   1 ;;; informat.el --- info support functions package for Emacs
   2
   3 ;; Copyright (C) 1986, 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008 Free Software Foundation, Inc.
   5
   6 ;; Maintainer: FSF
   7 ;; Keywords: help
   8
   9 ;; This file is part of GNU Emacs.
  10
  11 ;; GNU Emacs is free software; you can redistribute it and/or modify
  12 ;; it under the terms of the GNU General Public License as published by
  13 ;; the Free Software Foundation; either version 3, or (at your option)
  14 ;; any later version.
  15
  16 ;; GNU Emacs is distributed in the hope that it will be useful,
  17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 ;; GNU General Public License for more details.
  20
  21 ;; You should have received a copy of the GNU General Public License
  22 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  24 ;; Boston, MA 02110-1301, USA.
  25
  26 ;;; Commentary:
  27
  28 ;; Nowadays, the Texinfo formatting commands always tagify a buffer
  29 ;; (as does `makeinfo') since @anchor commands need tag tables.
  30
  31 ;;; Code:
  32
  33 (require 'info)
  34
  35 ;;;###autoload
  36 (defun Info-tagify (&optional input-buffer-name)
  37   "Create or update Info file tag table in current buffer or in a region."
  38   (interactive)
  39   ;; Save and restore point and restrictions.
  40   ;; save-restrictions would not work
  41   ;; because it records the old max relative to the end.
  42   ;; We record it relative to the beginning.
  43   (if input-buffer-name
  44       (message "Tagifying region in %s ..." input-buffer-name)
  45       (message
  46        "Tagifying %s ..."  (file-name-nondirectory (buffer-file-name))))
  47   (let ((omin (point-min))
  48         (omax (point-max))
  49         (nomax (= (point-max) (1+ (buffer-size))))
  50         (opoint (point)))
  51     (unwind-protect
  52     (progn
  53       (widen)
  54       (goto-char (point-min))
  55       (if (search-forward "\^_\nIndirect:\n" nil t)
  56           (message
  57            "Cannot tagify split info file.  Run this before splitting.")
  58         (let (tag-list
  59               refillp
  60               (case-fold-search t)
  61               (regexp
  62                (concat
  63                 "\\("
  64
  65
  66                 "\\("
  67                 "@anchor"        ; match-string 2 matches @anchor
  68                 "\\)"
  69                 "\\(-no\\|-yes\\)"  ; match-string 3 matches -no or -yes
  70                 "\\("
  71                 "-refill"
  72                 "\\)"
  73
  74                 "\\("
  75                 "{"
  76                 "\\)"
  77                 "\\("
  78                 "[^}]+"          ; match-string 6 matches arg to anchor
  79                 "\\)"
  80                 "\\("
  81                 "}"
  82                 "\\)"
  83
  84                 "\\|"
  85
  86                 "\\("
  87                 "\n\^_\\(\^L\\)?"
  88                 "\\)"
  89
  90                 "\\("
  91                 "\n\\(File:[ \t]*\\([^,\n\t]*\\)[,\t\n]+[ \t\n]*\\)?"
  92                 "Node:[ \t]*"
  93                 "\\("
  94                 "[^,\n\t]*"      ; match-string 13 matches arg to node name
  95                 "\\)"
  96                 "[,\t\n]"
  97                 "\\)"
  98
  99                 "\\)"
 100                 )))
 101           (while (re-search-forward regexp nil t)
 102             (if (string-equal "@anchor" (match-string 2))
 103                 (progn
 104                   ;; kludge lest lose match-data
 105                   (if (string-equal "-yes" (match-string 3))
 106                       (setq refillp t))
 107                   (setq tag-list
 108                         (cons (list
 109                                (concat "Ref: " (match-string 6))
 110                                (match-beginning 0))
 111                               tag-list))
 112                   (if (eq refillp t)
 113                       ;; set start and end so texinfo-format-refill works
 114                       (let ((texinfo-command-start (match-beginning 0))
 115                             (texinfo-command-end (match-end 0)))
 116                         (texinfo-format-refill))
 117                   (delete-region  (match-beginning 0) (match-end 0))))
 118               ;; else this is a Node
 119               (setq tag-list
 120                     (cons (list
 121                            (concat "Node: " (match-string-no-properties 13))
 122                            (1+ (match-beginning 10)))
 123                           tag-list))))
 124
 125               (goto-char (point-max))
 126               (forward-line -8)
 127               (let ((buffer-read-only nil))
 128                 (if (search-forward "\^_\nEnd tag table\n" nil t)
 129                     (let ((end (point)))
 130                       (search-backward "\nTag table:\n")
 131                       (beginning-of-line)
 132                       (delete-region (point) end)))
 133                 (goto-char (point-max))
 134                 (or (bolp)
 135                     (newline))
 136                 (insert "\^_\f\nTag table:\n")
 137                 (if (eq major-mode 'info-mode)
 138                     (move-marker Info-tag-table-marker (point)))
 139                 (setq tag-list (nreverse tag-list))
 140                 (while tag-list
 141                   (insert (car (car tag-list)) ?\177)
 142                   (princ (car (cdr (car tag-list))) (current-buffer))
 143                   (insert ?\n)
 144                   (setq tag-list (cdr tag-list)))
 145                 (insert "\^_\nEnd tag table\n")))))
 146       (goto-char opoint)
 147       (narrow-to-region omin (if nomax (1+ (buffer-size))
 148                                (min omax (point-max))))))
 149   (if input-buffer-name
 150       (message "Tagifying region in %s done" input-buffer-name)
 151       (message
 152        "Tagifying %s done"  (file-name-nondirectory (buffer-file-name)))))
 153
 154 \f
 155 ;;;###autoload
 156 (defun Info-split ()
 157   "Split an info file into an indirect file plus bounded-size subfiles.
 158 Each subfile will be up to 50,000 characters plus one node.
 159
 160 To use this command, first visit a large Info file that has a tag
 161 table.  The buffer is modified into a (small) indirect info file which
 162 should be saved in place of the original visited file.
 163
 164 The subfiles are written in the same directory the original file is
 165 in, with names generated by appending `-' and a number to the original
 166 file name.  The indirect file still functions as an Info file, but it
 167 contains just the tag table and a directory of subfiles."
 168
 169   (interactive)
 170   (if (< (buffer-size) 70000)
 171       (error "This is too small to be worth splitting"))
 172   (goto-char (point-min))
 173   (search-forward "\^_")
 174   (forward-char -1)
 175   (let ((start (point))
 176         (chars-deleted 0)
 177         subfiles
 178         (subfile-number 1)
 179         (case-fold-search t)
 180         (filename (file-name-sans-versions buffer-file-name)))
 181     (goto-char (point-max))
 182     (forward-line -8)
 183     (setq buffer-read-only nil)
 184     (or (search-forward "\^_\nEnd tag table\n" nil t)
 185         (error "Tag table required; use M-x Info-tagify"))
 186     (search-backward "\nTag table:\n")
 187     (if (looking-at "\nTag table:\n\^_")
 188         (error "Tag table is just a skeleton; use M-x Info-tagify"))
 189     (beginning-of-line)
 190     (forward-char 1)
 191     (save-restriction
 192       (narrow-to-region (point-min) (point))
 193       (goto-char (point-min))
 194       (while (< (1+ (point)) (point-max))
 195         (goto-char (min (+ (point) 50000) (point-max)))
 196         (search-forward "\^_" nil 'move)
 197         (setq subfiles
 198               (cons (list (+ start chars-deleted)
 199                           (concat (file-name-nondirectory filename)
 200                                   (format "-%d" subfile-number)))
 201                     subfiles))
 202         ;; Put a newline at end of split file, to make Unix happier.
 203         (insert "\n")
 204         (write-region (point-min) (point)
 205                       (concat filename (format "-%d" subfile-number)))
 206         (delete-region (1- (point)) (point))
 207         ;; Back up over the final ^_.
 208         (forward-char -1)
 209         (setq chars-deleted (+ chars-deleted (- (point) start)))
 210         (delete-region start (point))
 211         (setq subfile-number (1+ subfile-number))))
 212     (while subfiles
 213       (goto-char start)
 214       (insert (nth 1 (car subfiles))
 215               (format ": %d" (1- (car (car subfiles))))
 216               "\n")
 217       (setq subfiles (cdr subfiles)))
 218     (goto-char start)
 219     (insert "\^_\nIndirect:\n")
 220     (search-forward "\nTag Table:\n")
 221     (insert "(Indirect)\n")))
 222 \f
 223 (defvar Info-validate-allnodes)
 224 (defvar Info-validate-thisnode)
 225 (defvar Info-validate-lossages)
 226
 227 ;;;###autoload
 228 (defun Info-validate ()
 229   "Check current buffer for validity as an Info file.
 230 Check that every node pointer points to an existing node."
 231   (interactive)
 232   (save-excursion
 233     (save-restriction
 234       (widen)
 235       (goto-char (point-min))
 236       (if (search-forward "\nTag table:\n(Indirect)\n" nil t)
 237           (error "Don't yet know how to validate indirect info files: \"%s\""
 238                  (buffer-name (current-buffer))))
 239       (goto-char (point-min))
 240       (let ((Info-validate-allnodes '(("*")))
 241             (regexp "Node:[ \t]*\\([^,\n\t]*\\)[,\t\n]")
 242             (case-fold-search t)
 243             (tags-losing nil)
 244             (Info-validate-lossages ()))
 245         (while (search-forward "\n\^_" nil t)
 246           (forward-line 1)
 247           (let ((beg (point)))
 248             (forward-line 1)
 249             (if (re-search-backward regexp beg t)
 250                 (let ((name (downcase
 251                              (buffer-substring-no-properties
 252                               (match-beginning 1)
 253                               (progn
 254                                 (goto-char (match-end 1))
 255                                 (skip-chars-backward " \t")
 256                                 (point))))))
 257                   (if (assoc name Info-validate-allnodes)
 258                       (setq Info-validate-lossages
 259                             (cons (list name "Duplicate node-name" nil)
 260                                   Info-validate-lossages))
 261                     (setq Info-validate-allnodes
 262                           (cons (list name
 263                                       (progn
 264                                         (end-of-line)
 265                                         (and (re-search-backward
 266                                               "prev[ious]*:" beg t)
 267                                              (progn
 268                                                (goto-char (match-end 0))
 269                                                (downcase
 270                                                 (Info-following-node-name)))))
 271                                       beg)
 272                                 Info-validate-allnodes)))))))
 273         (goto-char (point-min))
 274         (while (search-forward "\n\^_" nil t)
 275           (forward-line 1)
 276           (let ((beg (point))
 277                 Info-validate-thisnode next)
 278             (forward-line 1)
 279             (if (re-search-backward regexp beg t)
 280                 (save-restriction
 281                   (let ((md (match-data)))
 282                     (search-forward "\n\^_" nil 'move)
 283                     (narrow-to-region beg (point))
 284                     (set-match-data md))
 285                   (setq Info-validate-thisnode (downcase
 286                                                 (buffer-substring-no-properties
 287                                                  (match-beginning 1)
 288                                                  (progn
 289                                                    (goto-char (match-end 1))
 290                                                    (skip-chars-backward " \t")
 291                                                    (point)))))
 292                   (end-of-line)
 293                   (and (search-backward "next:" nil t)
 294                        (setq next (Info-validate-node-name "invalid Next"))
 295                        (assoc next Info-validate-allnodes)
 296                        (if (equal (car (cdr (assoc next Info-validate-allnodes)))
 297                                   Info-validate-thisnode)
 298                            ;; allow multiple `next' pointers to one node
 299                            (let ((tem Info-validate-lossages))
 300                              (while tem
 301                                (if (and (equal (car (cdr (car tem)))
 302                                                "should have Previous")
 303                                         (equal (car (car tem))
 304                                                next))
 305                                    (setq Info-validate-lossages
 306                                          (delq (car tem) Info-validate-lossages)))
 307                                (setq tem (cdr tem))))
 308                          (setq Info-validate-lossages
 309                                (cons (list next
 310                                            "should have Previous"
 311                                            Info-validate-thisnode)
 312                                      Info-validate-lossages))))
 313                   (end-of-line)
 314                   (if (re-search-backward "prev[ious]*:" nil t)
 315                       (Info-validate-node-name "invalid Previous"))
 316                   (end-of-line)
 317                   (if (search-backward "up:" nil t)
 318                       (Info-validate-node-name "invalid Up"))
 319                   (if (re-search-forward "\n* Menu:" nil t)
 320                       (while (re-search-forward "\n\\* " nil t)
 321                         (Info-validate-node-name
 322                          (concat "invalid menu item "
 323                                  (buffer-substring (point)
 324                                                    (save-excursion
 325                                                      (skip-chars-forward "^:")
 326                                                      (point))))
 327                          (Info-extract-menu-node-name))))
 328                   (goto-char (point-min))
 329                   (while (re-search-forward "\\*note[ \n]*[^:\t]*:" nil t)
 330                     (goto-char (+ (match-beginning 0) 5))
 331                     (skip-chars-forward " \n")
 332                     (Info-validate-node-name
 333                      (concat "invalid reference "
 334                              (buffer-substring (point)
 335                                                (save-excursion
 336                                                  (skip-chars-forward "^:")
 337                                                  (point))))
 338                      (Info-extract-menu-node-name "Bad format cross-reference")))))))
 339         (setq tags-losing (not (Info-validate-tags-table)))
 340         (if (or Info-validate-lossages tags-losing)
 341             (with-output-to-temp-buffer " *problems in info file*"
 342               (while Info-validate-lossages
 343                 (princ "In node \"")
 344                 (princ (car (car Info-validate-lossages)))
 345                 (princ "\", ")
 346                 (let ((tem (nth 1 (car Info-validate-lossages))))
 347                   (cond ((string-match "\n" tem)
 348                          (princ (substring tem 0 (match-beginning 0)))
 349                          (princ "..."))
 350                         (t
 351                          (princ tem))))
 352                 (if (nth 2 (car Info-validate-lossages))
 353                     (progn
 354                       (princ ": ")
 355                       (let ((tem (nth 2 (car Info-validate-lossages))))
 356                         (cond ((string-match "\n" tem)
 357                                (princ (substring tem 0 (match-beginning 0)))
 358                                (princ "..."))
 359                               (t
 360                                (princ tem))))))
 361                 (terpri)
 362                 (setq Info-validate-lossages (cdr Info-validate-lossages)))
 363               (if tags-losing (princ "\nTags table must be recomputed\n")))
 364           ;; Here if info file is valid.
 365           ;; If we already made a list of problems, clear it out.
 366           (save-excursion
 367             (if (get-buffer " *problems in info file*")
 368                 (progn
 369                   (set-buffer " *problems in info file*")
 370                   (kill-buffer (current-buffer)))))
 371           (message "File appears valid"))))))
 372
 373 (defun Info-validate-node-name (kind &optional name)
 374   (if name
 375       nil
 376     (goto-char (match-end 0))
 377     (skip-chars-forward " \t")
 378     (if (= (following-char) ?\()
 379         nil
 380       (setq name
 381             (buffer-substring-no-properties
 382              (point)
 383              (progn
 384                (skip-chars-forward "^,\t\n")
 385                (skip-chars-backward " ")
 386                (point))))))
 387   (if (null name)
 388       nil
 389     (setq name (downcase name))
 390     (or (and (> (length name) 0) (= (aref name 0) ?\())
 391         (assoc name Info-validate-allnodes)
 392         (setq Info-validate-lossages
 393               (cons (list Info-validate-thisnode kind name)
 394                     Info-validate-lossages))))
 395   name)
 396
 397 (defun Info-validate-tags-table ()
 398   (goto-char (point-min))
 399   (if (not (search-forward "\^_\nEnd tag table\n" nil t))
 400       t
 401     (not (catch 'losing
 402            (let* ((end (match-beginning 0))
 403                   (start (progn (search-backward "\nTag table:\n")
 404                                 (1- (match-end 0))))
 405                   tem)
 406              (setq tem Info-validate-allnodes)
 407              (while tem
 408                (goto-char start)
 409                (or (equal (car (car tem)) "*")
 410                    (search-forward (concat "Node: "
 411                                            (car (car tem))
 412                                            "\177")
 413                                    end t)
 414                    (throw 'losing 'x))
 415                (setq tem (cdr tem)))
 416              (goto-char (1+ start))
 417              (while (looking-at ".*Node: \\(.*\\)\177\\([0-9]+\\)$")
 418                (setq tem (downcase (buffer-substring-no-properties
 419                                      (match-beginning 1)
 420                                      (match-end 1))))
 421                (setq tem (assoc tem Info-validate-allnodes))
 422                (if (or (not tem)
 423                        (< 1000 (progn
 424                                  (goto-char (match-beginning 2))
 425                                  (setq tem (- (car (cdr (cdr tem)))
 426                                               (read (current-buffer))))
 427                                  (if (> tem 0) tem (- tem)))))
 428                    (throw 'losing 'y))
 429                (forward-line 1)))
 430            (if (looking-at "\^_\n")
 431                (forward-line 1))
 432            (or (looking-at "End tag table\n")
 433                (throw 'losing 'z))
 434            nil))))
 435 \f
 436 ;;;###autoload
 437 (defun batch-info-validate ()
 438   "Runs `Info-validate' on the files remaining on the command line.
 439 Must be used only with -batch, and kills Emacs on completion.
 440 Each file will be processed even if an error occurred previously.
 441 For example, invoke \"emacs -batch -f batch-info-validate $info/ ~/*.info\""
 442   (if (not noninteractive)
 443       (error "batch-info-validate may only be used -batch"))
 444   (let ((version-control t)
 445         (auto-save-default nil)
 446         (find-file-run-dired nil)
 447         (kept-old-versions 259259)
 448         (kept-new-versions 259259))
 449     (let ((error 0)
 450           file
 451           (files ()))
 452       (while command-line-args-left
 453         (setq file (expand-file-name (car command-line-args-left)))
 454         (cond ((not (file-exists-p file))
 455                (message ">> %s does not exist!" file)
 456                (setq error 1
 457                      command-line-args-left (cdr command-line-args-left)))
 458               ((file-directory-p file)
 459                (setq command-line-args-left (nconc (directory-files file)
 460                                               (cdr command-line-args-left))))
 461               (t
 462                (setq files (cons file files)
 463                      command-line-args-left (cdr command-line-args-left)))))
 464       (while files
 465         (setq file (car files)
 466               files (cdr files))
 467         (let ((lose nil))
 468           (condition-case err
 469               (progn
 470                 (if buffer-file-name (kill-buffer (current-buffer)))
 471                 (find-file file)
 472                 (buffer-disable-undo (current-buffer))
 473                 (set-buffer-modified-p nil)
 474                 (fundamental-mode)
 475                 (let ((case-fold-search nil))
 476                   (goto-char (point-max))
 477                   (cond ((search-backward "\n\^_\^L\nTag table:\n" nil t)
 478                          (message "%s already tagified" file))
 479                         ((< (point-max) 30000)
 480                          (message "%s too small to bother tagifying" file))
 481                         (t
 482                          (Info-tagify))))
 483                 (let ((loss-name " *problems in info file*"))
 484                   (message "Checking validity of info file %s..." file)
 485                   (if (get-buffer loss-name)
 486                       (kill-buffer loss-name))
 487                   (Info-validate)
 488                   (if (not (get-buffer loss-name))
 489                       nil ;(message "Checking validity of info file %s... OK" file)
 490                     (message "----------------------------------------------------------------------")
 491                     (message ">> PROBLEMS IN INFO FILE %s" file)
 492                     (save-excursion
 493                       (set-buffer loss-name)
 494                       (princ (buffer-substring-no-properties
 495                               (point-min) (point-max))))
 496                     (message "----------------------------------------------------------------------")
 497                     (setq error 1 lose t)))
 498                 (if (and (buffer-modified-p)
 499                          (not lose))
 500                     (progn (message "Saving modified %s" file)
 501                            (save-buffer))))
 502             (error (message ">> Error: %s" (prin1-to-string err))))))
 503       (kill-emacs error))))
 504
 505 (provide 'informat)
 506
 507 ;;; arch-tag: 581c440e-5be1-4f31-b005-2d5824bbf569
 508 ;;; informat.el ends here