lisp/international/mule-diag.el

   1 ;;; mule-diag.el --- show diagnosis of multilingual environment (Mule)
   2
   3 ;; Copyright (C) 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   4 ;;   2007, 2008, 2009  Free Software Foundation, Inc.
   5 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
   6 ;;   2005, 2006, 2007, 2008, 2009
   7 ;;   National Institute of Advanced Industrial Science and Technology (AIST)
   8 ;;   Registration Number H14PRO021
   9 ;; Copyright (C) 2003
  10 ;;   National Institute of Advanced Industrial Science and Technology (AIST)
  11 ;;   Registration Number H13PRO009
  12
  13 ;; Keywords: multilingual, charset, coding system, fontset, diagnosis, i18n
  14
  15 ;; This file is part of GNU Emacs.
  16
  17 ;; GNU Emacs is free software: you can redistribute it and/or modify
  18 ;; it under the terms of the GNU General Public License as published by
  19 ;; the Free Software Foundation, either version 3 of the License, or
  20 ;; (at your option) any later version.
  21
  22 ;; GNU Emacs is distributed in the hope that it will be useful,
  23 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  24 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25 ;; GNU General Public License for more details.
  26
  27 ;; You should have received a copy of the GNU General Public License
  28 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  29
  30 ;;; Commentary:
  31
  32 ;;; Code:
  33
  34 ;; Make sure the help-xref button type is defined.
  35 (require 'help-fns)
  36
  37 ;;; General utility function
  38
  39 (defun print-list (&rest args)
  40   "Print all arguments with single space separator in one line."
  41   (princ (mapconcat (lambda (arg) (prin1-to-string arg t)) args " "))
  42   (princ "\n"))
  43
  44 ;;; CHARSET
  45
  46 (define-button-type 'sort-listed-character-sets
  47   'help-echo (purecopy "mouse-2, RET: sort on this column")
  48   'face 'bold
  49   'action #'(lambda (button)
  50               (sort-listed-character-sets (button-get button 'sort-key))))
  51
  52 (define-button-type 'list-charset-chars
  53   :supertype 'help-xref
  54   'help-function #'list-charset-chars
  55   'help-echo "mouse-2, RET: show table of characters for this character set")
  56
  57 ;;;###autoload
  58 (defun list-character-sets (arg)
  59   "Display a list of all character sets.
  60
  61 The D column contains the dimension of this character set.  The CH
  62 column contains the number of characters in a block of this character
  63 set.  The FINAL-CHAR column contains an ISO-2022 <final-char> to use
  64 for designating this character set in ISO-2022-based coding systems.
  65
  66 With prefix ARG, the output format gets more cryptic,
  67 but still shows the full information."
  68   (interactive "P")
  69   (help-setup-xref (list #'list-character-sets arg) (interactive-p))
  70   (with-output-to-temp-buffer "*Character Set List*"
  71     (with-current-buffer standard-output
  72       (if arg
  73           (list-character-sets-2)
  74         ;; Insert header.
  75         (insert "Supplementary character sets are shown below.\n")
  76         (insert
  77          (substitute-command-keys
  78           (concat "Use "
  79                   (if (display-mouse-p) "\\[help-follow-mouse] or ")
  80                   "\\[help-follow]:\n")))
  81         (insert "  on a column title to sort by that title,")
  82         (indent-to 48)
  83         (insert "+----DIMENSION\n")
  84         (insert "  on a charset name to list characters.")
  85         (indent-to 48)
  86         (insert "| +--CHARS\n")
  87         (let ((columns '(("CHARSET-NAME" . name) "\t\t\t\t\t"
  88                          ("D CH  FINAL-CHAR" . iso-spec)))
  89               pos)
  90           (while columns
  91             (if (stringp (car columns))
  92                 (insert (car columns))
  93               (insert-text-button (car (car columns))
  94                                   :type 'sort-listed-character-sets
  95                                   'sort-key (cdr (car columns)))
  96               (goto-char (point-max)))
  97             (setq columns (cdr columns)))
  98           (insert "\n"))
  99         (insert "------------\t\t\t\t\t- --- ----------\n")
 100
 101         ;; Insert body sorted by charset IDs.
 102         (list-character-sets-1 'name)))))
 103
 104 (defun sort-listed-character-sets (sort-key)
 105   (if sort-key
 106       (save-excursion
 107         (let ((buffer-read-only nil))
 108           (goto-char (point-min))
 109           (search-forward "\n-")
 110           (forward-line 1)
 111           (delete-region (point) (point-max))
 112           (list-character-sets-1 sort-key)))))
 113
 114 (defun list-character-sets-1 (sort-key)
 115   "Insert a list of character sets sorted by SORT-KEY.
 116 SORT-KEY should be `name' or `iso-spec' (default `name')."
 117   (or sort-key
 118       (setq sort-key 'name))
 119   (let ((tail charset-list)
 120         charset-info-list supplementary-list charset sort-func)
 121     (dolist (charset charset-list)
 122       ;; Generate a list that contains all information to display.
 123       (let ((elt (list charset
 124                        (charset-dimension charset)
 125                        (charset-chars charset)
 126                        (charset-iso-final-char charset))))
 127         (if (plist-get (charset-plist charset) :supplementary-p)
 128             (push elt supplementary-list)
 129           (push elt charset-info-list))))
 130
 131     ;; Determine a predicate for `sort' by SORT-KEY.
 132     (setq sort-func
 133           (cond ((eq sort-key 'name)
 134                  (lambda (x y) (string< (car x) (car y))))
 135
 136                 ((eq sort-key 'iso-spec)
 137                  ;; Sort by DIMENSION CHARS FINAL-CHAR
 138                  (function
 139                   (lambda (x y)
 140                     (or (< (nth 1 x) (nth 1 y))
 141                         (and (= (nth 1 x) (nth 1 y))
 142                              (or (< (nth 2 x) (nth 2 y))
 143                                  (and (= (nth 2 x) (nth 2 y))
 144                                       (< (nth 3 x) (nth 3 y)))))))))
 145                 (t
 146                  (error "Invalid charset sort key: %s" sort-key))))
 147
 148     (setq charset-info-list (sort charset-info-list sort-func))
 149     (setq supplementary-list (sort supplementary-list sort-func))
 150
 151     ;; Insert information of character sets.
 152     (dolist (elt (append charset-info-list (list t) supplementary-list))
 153       (if (eq elt t)
 154           (insert "-------------- Supplementary Character Sets --------------")
 155         (insert-text-button (symbol-name (car elt)) ; NAME
 156                             :type 'list-charset-chars
 157                             'help-args (list (car elt)))
 158         (goto-char (point-max))
 159         (insert "\t")
 160         (indent-to 48)
 161         (insert (format "%d %3d "
 162                         (nth 1 elt) (nth 2 elt)) ; DIMENSION and CHARS
 163                 (if (< (nth 3 elt) 0)
 164                     "none"
 165                   (nth 3 elt))))        ; FINAL-CHAR
 166       (insert "\n"))))
 167
 168
 169 ;; List all character sets in a form that a program can easily parse.
 170
 171 (defun list-character-sets-2 ()
 172   (insert "#########################
 173 ## LIST OF CHARSETS
 174 ## Each line corresponds to one charset.
 175 ## The following attributes are listed in this order
 176 ## separated by a colon `:' in one line.
 177 ##      CHARSET-SYMBOL-NAME,
 178 ##      DIMENSION (1-4)
 179 ##      CHARS (number of characters in first dimension of charset)
 180 ##      ISO-FINAL-CHAR (character code of ISO-2022's final character)
 181 ##              -1 means that no final character is assigned.
 182 ##      DESCRIPTION (describing string of the charset)
 183 ")
 184   (dolist (charset charset-list)
 185     (princ (format "%s:%d:%d:%d:%s\n"
 186                    charset
 187                    (charset-dimension charset)
 188                    (charset-chars charset)
 189 ;;;                (char-width (make-char charset))
 190 ;;;                (charset-direction charset)
 191                    (charset-iso-final-char charset)
 192 ;;;                (charset-iso-graphic-plane charset)
 193                    (charset-description charset)))))
 194
 195 (defvar non-iso-charset-alist nil
 196   "Obsolete.")
 197 (make-obsolete-variable 'non-iso-charset-alist "no longer relevant." "23.1")
 198
 199 (defun decode-codepage-char (codepage code)
 200   "Decode a character that has code CODE in CODEPAGE.
 201 Return a decoded character string.  Each CODEPAGE corresponds to a
 202 coding system cpCODEPAGE."
 203   (decode-char (intern (format "cp%d" codepage)) code))
 204 (make-obsolete 'decode-codepage-char 'decode-char "23.1")
 205
 206 ;; A variable to hold charset input history.
 207 (defvar charset-history nil)
 208
 209
 210 ;;;###autoload
 211 (defun read-charset (prompt &optional default-value initial-input)
 212   "Read a character set from the minibuffer, prompting with string PROMPT.
 213 It must be an Emacs character set listed in the variable `charset-list'.
 214
 215 Optional arguments are DEFAULT-VALUE and INITIAL-INPUT.
 216 DEFAULT-VALUE, if non-nil, is the default value.
 217 INITIAL-INPUT, if non-nil, is a string inserted in the minibuffer initially.
 218 See the documentation of the function `completing-read' for the detailed
 219 meanings of these arguments."
 220   (let* ((table (mapcar (lambda (x) (list (symbol-name x))) charset-list))
 221          (charset (completing-read prompt table
 222                                    nil t initial-input 'charset-history
 223                                    default-value)))
 224     (if (> (length charset) 0)
 225         (intern charset))))
 226
 227 ;; List characters of the range MIN and MAX of CHARSET.  If dimension
 228 ;; of CHARSET is two (i.e. 2-byte charset), ROW is the first byte
 229 ;; (block index) of the characters, and MIN and MAX are the second
 230 ;; bytes of the characters.  If the dimension is one, ROW should be 0.
 231
 232 (defun list-block-of-chars (charset row min max)
 233   (let (i ch)
 234     (insert-char ?- (+ 7 (* 4 16)))
 235     (insert "\n     ")
 236     (setq i 0)
 237     (while (< i 16)
 238       (insert (format "%4X" i))
 239       (setq i (1+ i)))
 240     (setq i (* (/ min 16) 16))
 241     (while (<= i max)
 242       (if (= (% i 16) 0)
 243           (insert (format "\n%6Xx" (/ (+ (* row 256) i) 16))))
 244       (setq ch (if (< i min)
 245                    32
 246                  (or (decode-char charset (+ (* row 256) i))
 247                      32)))              ; gap in mapping
 248       ;; Don't insert control codes, non-Unicode characters.
 249       (if (or (< ch 32) (= ch 127))
 250           (setq ch (single-key-description ch))
 251         (if (and (>= ch 128) (< ch 160))
 252             (setq ch (format "%02Xh" ch))
 253           (if (> ch #x10FFFF)
 254               (setq ch 32))))
 255       (insert "\t" ch)
 256       (setq i (1+ i))))
 257   (insert "\n"))
 258
 259 ;;;###autoload
 260 (defun list-charset-chars (charset)
 261   "Display a list of characters in character set CHARSET."
 262   (interactive (list (read-charset "Character set: ")))
 263   (or (charsetp charset)
 264       (error "Invalid character set: %s" charset))
 265   (with-output-to-temp-buffer "*Character List*"
 266     (with-current-buffer standard-output
 267       (if (coding-system-p charset)
 268           ;; Useful to be able to do C-u C-x = to find file code, for
 269           ;; instance:
 270           (set-buffer-file-coding-system charset))
 271       (setq mode-line-format (copy-sequence mode-line-format))
 272       (let ((slot (memq 'mode-line-buffer-identification mode-line-format)))
 273         (if slot
 274             (setcdr slot
 275                     (cons (format " (%s)" charset)
 276                           (cdr slot)))))
 277       (setq tab-width 4)
 278       (set-buffer-multibyte t)
 279       (let ((dim (charset-dimension charset))
 280             (chars (charset-chars charset))
 281             ;;  (plane (charset-iso-graphic-plane charset))
 282             (plane 1)
 283             (range (plist-get (charset-plist charset) :code-space))
 284             min max min2 max2)
 285         (if (> dim 2)
 286             (error "Can only list 1- and 2-dimensional charsets"))
 287         (insert (format "Characters in the coded character set %s.\n" charset))
 288         (narrow-to-region (point) (point))
 289         (setq min (aref range 0)
 290               max (aref range 1))
 291         (if (= dim 1)
 292             (list-block-of-chars charset 0 min max)
 293           (setq min2 (aref range 2)
 294                 max2 (aref range 3))
 295           (let ((i min2))
 296             (while (<= i max2)
 297               (list-block-of-chars charset i min max)
 298               (setq i (1+ i)))))
 299         (put-text-property (point-min) (point-max) 'charset charset)
 300         (widen)))))
 301
 302
 303 ;;;###autoload
 304 (defun describe-character-set (charset)
 305   "Display information about built-in character set CHARSET."
 306   (interactive (list (read-charset "Charset: ")))
 307   (or (charsetp charset)
 308       (error "Invalid charset: %S" charset))
 309   (help-setup-xref (list #'describe-character-set charset) (interactive-p))
 310   (with-output-to-temp-buffer (help-buffer)
 311     (with-current-buffer standard-output
 312       (insert "Character set: " (symbol-name charset))
 313       (let ((name (get-charset-property charset :name)))
 314         (if (not (eq name charset))
 315             (insert " (alias of " (symbol-name name) ?\))))
 316       (insert "\n\n" (charset-description charset) "\n\n")
 317       (insert "Number of contained characters: ")
 318       (dotimes (i (charset-dimension charset))
 319         (unless (= i 0)
 320           (insert ?x))
 321         (insert (format "%d" (charset-chars charset (1+ i)))))
 322       (insert ?\n)
 323       (let ((char (charset-iso-final-char charset)))
 324         (when (> char 0)
 325           (insert "Final char of ISO2022 designation sequence: ")
 326           (insert (format "`%c'\n" char))))
 327       (insert (format "Width (how many columns on screen): %d\n"
 328                       (aref char-width-table (make-char charset))))
 329       (let (aliases)
 330         (dolist (c charset-list)
 331           (if (and (not (eq c charset))
 332                    (eq charset (get-charset-property c :name)))
 333               (push c aliases)))
 334         (if aliases
 335             (insert "Aliases: " (mapconcat #'symbol-name aliases ", ") ?\n)))
 336
 337       (dolist (elt `((:ascii-compatible-p "ASCII compatible." nil)
 338                      (:map "Map file: " identity)
 339                      (:unify-map "Unification map file: " identity)
 340                      (:invalid-code
 341                       nil
 342                       ,(lambda (c)
 343                          (format "Invalid character: %c (code %d)" c c)))
 344                      (:emacs-mule-id "Id in emacs-mule coding system: "
 345                                      number-to-string)
 346                      (:parents "Parents: "
 347                                (lambda (parents)
 348                                  (mapconcat ,(lambda (elt)
 349                                                (format "%s" elt))
 350                                             parents
 351                                             ", ")))
 352                      (:code-space "Code space: " ,(lambda (c)
 353                                                     (format "%s" c)))
 354                      (:code-offset "Code offset: " number-to-string)
 355                      (:iso-revision-number "ISO revision number: "
 356                                            number-to-string)
 357                      (:supplementary-p
 358                       "Used only as a parent of some other charset." nil)))
 359         (let ((val (get-charset-property charset (car elt))))
 360           (when val
 361             (if (cadr elt) (insert (cadr elt)))
 362             (if (nth 2 elt)
 363                 (insert (funcall (nth 2 elt) val)))
 364             (insert ?\n)))))))
 365 \f
 366 ;;; CODING-SYSTEM
 367
 368 (defvar graphic-register)               ; dynamic bondage
 369
 370 ;; Print information about designation of each graphic register in
 371 ;; DESIGNATIONS in human readable format.  See the documentation of
 372 ;; `define-coding-system' for the meaning of DESIGNATIONS
 373 ;; (`:designation' property).
 374 (defun print-designation (designations)
 375   (let (charset)
 376     (dotimes (graphic-register 4)
 377       (setq charset (aref designations graphic-register))
 378       (princ (format
 379               "  G%d -- %s\n"
 380               graphic-register
 381               (cond ((null charset)
 382                      "never used")
 383                     ((eq charset t)
 384                      "no initial designation, and used by any charsets")
 385                     ((symbolp charset)
 386                      (format "%s:%s"
 387                              charset (charset-description charset)))
 388                     ((listp charset)
 389                      (if (charsetp (car charset))
 390                          (format "%s:%s, and also used by the following:"
 391                                  (car charset)
 392                                  (charset-description (car charset)))
 393                        "no initial designation, and used by the following:"))
 394                     (t
 395                      "invalid designation information"))))
 396       (when (listp charset)
 397         (setq charset (cdr charset))
 398         (while charset
 399           (cond ((eq (car charset) t)
 400                  (princ "\tany other charsets\n"))
 401                 ((charsetp (car charset))
 402                  (princ (format "\t%s:%s\n"
 403                                 (car charset)
 404                                 (charset-description (car charset)))))
 405                 (t
 406                  "invalid designation information"))
 407           (setq charset (cdr charset)))))))
 408
 409 ;;;###autoload
 410 (defun describe-coding-system (coding-system)
 411   "Display information about CODING-SYSTEM."
 412   (interactive "zDescribe coding system (default current choices): ")
 413   (if (null coding-system)
 414       (describe-current-coding-system)
 415     (help-setup-xref (list #'describe-coding-system coding-system)
 416                      (interactive-p))
 417     (with-output-to-temp-buffer (help-buffer)
 418       (print-coding-system-briefly coding-system 'doc-string)
 419       (let ((type (coding-system-type coding-system))
 420             ;; Fixme: use this
 421             (extra-spec (coding-system-plist coding-system)))
 422         (princ "Type: ")
 423         (princ type)
 424         (cond ((eq type 'undecided)
 425                (princ " (do automatic conversion)"))
 426               ((eq type 'utf-8)
 427                (princ " (UTF-8: Emacs internal multibyte form)"))
 428               ((eq type 'utf-16)
 429                ;; (princ " (UTF-16)")
 430                )
 431               ((eq type 'shift-jis)
 432                (princ " (Shift-JIS, MS-KANJI)"))
 433               ((eq type 'iso-2022)
 434                (princ " (variant of ISO-2022)\n")
 435                (princ "Initial designations:\n")
 436                (print-designation (coding-system-get coding-system
 437                                                      :designation))
 438
 439                (when (coding-system-get coding-system :flags)
 440                  (princ "Other specifications: \n  ")
 441                  (apply #'print-list
 442                         (coding-system-get coding-system :flags))))
 443               ((eq type 'charset)
 444                (princ " (charset)"))
 445               ((eq type 'ccl)
 446                (princ " (do conversion by CCL program)"))
 447               ((eq type 'raw-text)
 448                (princ " (text with random binary characters)"))
 449               ((eq type 'emacs-mule)
 450                (princ " (Emacs 21 internal encoding)"))
 451               (t (princ ": invalid coding-system.")))
 452         (princ "\nEOL type: ")
 453         (let ((eol-type (coding-system-eol-type coding-system)))
 454           (cond ((vectorp eol-type)
 455                  (princ "Automatic selection from:\n\t")
 456                  (princ eol-type)
 457                  (princ "\n"))
 458                 ((or (null eol-type) (eq eol-type 0)) (princ "LF\n"))
 459                 ((eq eol-type 1) (princ "CRLF\n"))
 460                 ((eq eol-type 2) (princ "CR\n"))
 461                 (t (princ "invalid\n")))))
 462       (let ((postread (coding-system-get coding-system :post-read-conversion)))
 463         (when postread
 464           (princ "After decoding text normally,")
 465           (princ " perform post-conversion using the function: ")
 466           (princ "\n  ")
 467           (princ postread)
 468           (princ "\n")))
 469       (let ((prewrite (coding-system-get coding-system :pre-write-conversion)))
 470         (when prewrite
 471           (princ "Before encoding text normally,")
 472           (princ " perform pre-conversion using the function: ")
 473           (princ "\n  ")
 474           (princ prewrite)
 475           (princ "\n")))
 476       (with-current-buffer standard-output
 477         (let ((charsets (coding-system-charset-list coding-system)))
 478           (when (and (not (eq (coding-system-base coding-system) 'raw-text))
 479                      charsets)
 480             (cond
 481              ((eq charsets 'iso-2022)
 482               (insert "This coding system can encode all ISO 2022 charsets."))
 483              ((eq charsets 'emacs-mule)
 484               (insert "This coding system can encode all emacs-mule charsets\
 485 ."""))
 486              (t
 487               (insert "This coding system encodes the following charsets:\n ")
 488               (while charsets
 489                 (insert " " (symbol-name (car charsets)))
 490                 (search-backward (symbol-name (car charsets)))
 491                 (help-xref-button 0 'help-character-set (car charsets))
 492                 (goto-char (point-max))
 493                 (setq charsets (cdr charsets)))))))))))
 494
 495 ;;;###autoload
 496 (defun describe-current-coding-system-briefly ()
 497   "Display coding systems currently used in a brief format in echo area.
 498
 499 The format is \"F[..],K[..],T[..],P>[..],P<[..], default F[..],P<[..],P<[..]\",
 500 where mnemonics of the following coding systems come in this order
 501 in place of `..':
 502   `buffer-file-coding-system' (of the current buffer)
 503   eol-type of `buffer-file-coding-system' (of the current buffer)
 504   Value returned by `keyboard-coding-system'
 505   eol-type of `keyboard-coding-system'
 506   Value returned by `terminal-coding-system'.
 507   eol-type of `terminal-coding-system'
 508   `process-coding-system' for read (of the current buffer, if any)
 509   eol-type of `process-coding-system' for read (of the current buffer, if any)
 510   `process-coding-system' for write (of the current buffer, if any)
 511   eol-type of `process-coding-system' for write (of the current buffer, if any)
 512   `default-buffer-file-coding-system'
 513   eol-type of `default-buffer-file-coding-system'
 514   `default-process-coding-system' for read
 515   eol-type of `default-process-coding-system' for read
 516   `default-process-coding-system' for write
 517   eol-type of `default-process-coding-system'"
 518   (interactive)
 519   (let* ((proc (get-buffer-process (current-buffer)))
 520          (process-coding-systems (if proc (process-coding-system proc))))
 521     (message
 522      "F[%c%s],K[%c%s],T[%c%s],P>[%c%s],P<[%c%s], default F[%c%s],P>[%c%s],P<[%c%s]"
 523      (coding-system-mnemonic buffer-file-coding-system)
 524      (coding-system-eol-type-mnemonic buffer-file-coding-system)
 525      (coding-system-mnemonic (keyboard-coding-system))
 526      (coding-system-eol-type-mnemonic (keyboard-coding-system))
 527      (coding-system-mnemonic (terminal-coding-system))
 528      (coding-system-eol-type-mnemonic (terminal-coding-system))
 529      (coding-system-mnemonic (car process-coding-systems))
 530      (coding-system-eol-type-mnemonic (car process-coding-systems))
 531      (coding-system-mnemonic (cdr process-coding-systems))
 532      (coding-system-eol-type-mnemonic (cdr process-coding-systems))
 533      (coding-system-mnemonic default-buffer-file-coding-system)
 534      (coding-system-eol-type-mnemonic default-buffer-file-coding-system)
 535      (coding-system-mnemonic (car default-process-coding-system))
 536      (coding-system-eol-type-mnemonic (car default-process-coding-system))
 537      (coding-system-mnemonic (cdr default-process-coding-system))
 538      (coding-system-eol-type-mnemonic (cdr default-process-coding-system))
 539      )))
 540
 541 (defun print-coding-system-briefly (coding-system &optional doc-string)
 542   "Print symbol name and mnemonic letter of CODING-SYSTEM with `princ'.
 543 If DOC-STRING is non-nil, print also the docstring of CODING-SYSTEM.
 544 If DOC-STRING is `tightly', don't print an empty line before the
 545 docstring, and print only the first line of the docstring."
 546   (if (not coding-system)
 547       (princ "nil\n")
 548     (princ (format "%c -- %s"
 549                    (coding-system-mnemonic coding-system)
 550                    coding-system))
 551     (let ((aliases (coding-system-aliases coding-system)))
 552       (cond ((eq coding-system (car aliases))
 553              (if (cdr aliases)
 554                  (princ (format " %S" (cons 'alias: (cdr aliases))))))
 555             ((memq coding-system aliases)
 556              (princ (format " (alias of %s)" (car aliases))))
 557             (t
 558              (let ((eol-type (coding-system-eol-type coding-system))
 559                    (base-eol-type (coding-system-eol-type (car aliases))))
 560                (if (and (integerp eol-type)
 561                         (vectorp base-eol-type)
 562                         (not (eq coding-system (aref base-eol-type eol-type))))
 563                    (princ (format " (alias of %s)"
 564                                   (aref base-eol-type eol-type))))))))
 565     (princ "\n")
 566     (or (eq doc-string 'tightly)
 567         (princ "\n"))
 568     (if doc-string
 569         (let ((doc (or (coding-system-doc-string coding-system) "")))
 570           (when (eq doc-string 'tightly)
 571             (if (string-match "\n" doc)
 572                 (setq doc (substring doc 0 (match-beginning 0))))
 573             (setq doc (concat "  " doc)))
 574           (princ (format "%s\n" doc))))))
 575
 576 ;;;###autoload
 577 (defun describe-current-coding-system ()
 578   "Display coding systems currently used, in detail."
 579   (interactive)
 580   (with-output-to-temp-buffer "*Help*"
 581     (let* ((proc (get-buffer-process (current-buffer)))
 582            (process-coding-systems (if proc (process-coding-system proc))))
 583       (princ "Coding system for saving this buffer:\n  ")
 584       (if (local-variable-p 'buffer-file-coding-system)
 585           (print-coding-system-briefly buffer-file-coding-system)
 586         (princ "Not set locally, use the default.\n"))
 587       (princ "Default coding system (for new files):\n  ")
 588       (print-coding-system-briefly default-buffer-file-coding-system)
 589       (princ "Coding system for keyboard input:\n  ")
 590       (print-coding-system-briefly (keyboard-coding-system))
 591       (princ "Coding system for terminal output:\n  ")
 592       (print-coding-system-briefly (terminal-coding-system))
 593       (when (boundp 'selection-coding-system)
 594           (princ "Coding system for inter-client cut and paste:\n  ")
 595           (print-coding-system-briefly selection-coding-system))
 596       (when (get-buffer-process (current-buffer))
 597         (princ "Coding systems for process I/O:\n")
 598         (princ "  encoding input to the process: ")
 599         (print-coding-system-briefly (cdr process-coding-systems))
 600         (princ "  decoding output from the process: ")
 601         (print-coding-system-briefly (car process-coding-systems)))
 602       (princ "Defaults for subprocess I/O:\n")
 603       (princ "  decoding: ")
 604       (print-coding-system-briefly (car default-process-coding-system))
 605       (princ "  encoding: ")
 606       (print-coding-system-briefly (cdr default-process-coding-system)))
 607
 608     (with-current-buffer standard-output
 609
 610       (princ "
 611 Priority order for recognizing coding systems when reading files:\n")
 612       (let ((i 1))
 613         (dolist (elt (coding-system-priority-list))
 614           (princ (format "  %d. %s " i elt))
 615           (let ((aliases (coding-system-aliases elt)))
 616             (if (eq elt (car aliases))
 617                 (if (cdr aliases)
 618                     (princ (cons 'alias: (cdr aliases))))
 619               (princ (list 'alias 'of (car aliases))))
 620             (terpri)
 621             (setq i (1+ i)))))
 622
 623       (princ "\n  Other coding systems cannot be distinguished automatically
 624   from these, and therefore cannot be recognized automatically
 625   with the present coding system priorities.\n\n")
 626
 627       ;; Fixme: should this be replaced or junked?
 628       (if nil
 629       (let ((categories '(coding-category-iso-7 coding-category-iso-7-else))
 630             coding-system codings)
 631         (while categories
 632           (setq coding-system (symbol-value (car categories)))
 633           (mapc
 634            (lambda (x)
 635              (if (and (not (eq x coding-system))
 636                        (let ((flags (coding-system-get :flags)))
 637                          (not (or (memq 'use-roman flags)
 638                                   (memq 'use-oldjis flags)))))
 639                  (setq codings (cons x codings))))
 640            (get (car categories) 'coding-systems))
 641           (if codings
 642               (let ((max-col (window-width))
 643                     pos)
 644                 (princ (format "\
 645   The following are decoded correctly but recognized as %s:\n   "
 646                                coding-system))
 647                 (while codings
 648                   (setq pos (point))
 649                   (insert (format " %s" (car codings)))
 650                   (when (> (current-column) max-col)
 651                     (goto-char pos)
 652                     (insert "\n   ")
 653                     (goto-char (point-max)))
 654                   (setq codings (cdr codings)))
 655                 (insert "\n\n")))
 656           (setq categories (cdr categories)))))
 657
 658       (princ "Particular coding systems specified for certain file names:\n")
 659       (terpri)
 660       (princ "  OPERATION\tTARGET PATTERN\t\tCODING SYSTEM(s)\n")
 661       (princ "  ---------\t--------------\t\t----------------\n")
 662       (let ((func (lambda (operation alist)
 663                     (princ "  ")
 664                     (princ operation)
 665                     (if (not alist)
 666                         (princ "\tnothing specified\n")
 667                       (while alist
 668                         (indent-to 16)
 669                         (prin1 (car (car alist)))
 670                         (if (>= (current-column) 40)
 671                             (newline))
 672                         (indent-to 40)
 673                         (princ (cdr (car alist)))
 674                         (princ "\n")
 675                         (setq alist (cdr alist)))))))
 676         (funcall func "File I/O" file-coding-system-alist)
 677         (funcall func "Process I/O" process-coding-system-alist)
 678         (funcall func "Network I/O" network-coding-system-alist))
 679       (help-mode))))
 680
 681 (defun print-coding-system (coding-system)
 682   "Print detailed information on CODING-SYSTEM."
 683   (let ((type (coding-system-type coding-system))
 684         (eol-type (coding-system-eol-type coding-system))
 685         (flags (coding-system-get coding-system :flags))
 686         (aliases (coding-system-aliases coding-system)))
 687     (if (not (eq (car aliases) coding-system))
 688         (princ (format "%s (alias of %s)\n" coding-system (car aliases)))
 689       (princ coding-system)
 690       (dolist (alias (cdr aliases))
 691         (princ ",")
 692         (princ alias))
 693       (princ (format ":%s:%c:%d:"
 694                      type
 695                      (coding-system-mnemonic coding-system)
 696                      (if (integerp eol-type) eol-type 3)))
 697       (cond ((eq type 'iso2022)
 698              (let ((idx 0)
 699                    charset)
 700                (while (< idx 4)
 701                  (setq charset (aref flags idx))
 702                  (cond ((null charset)
 703                         (princ -1))
 704                        ((eq charset t)
 705                         (princ -2))
 706                        ((charsetp charset)
 707                         (princ charset))
 708                        ((listp charset)
 709                         (princ "(")
 710                         (princ (car charset))
 711                         (setq charset (cdr charset))
 712                         (while charset
 713                           (princ ",")
 714                           (princ (car charset))
 715                           (setq charset (cdr charset)))
 716                         (princ ")")))
 717                  (princ ",")
 718                  (setq idx (1+ idx)))
 719                (while (< idx 12)
 720                  (princ (if (aref flags idx) 1 0))
 721                  (princ ",")
 722                  (setq idx (1+ idx)))
 723                (princ (if (aref flags idx) 1 0))))
 724             ((eq type 'ccl)
 725              (let (i len)
 726                (if (symbolp (car flags))
 727                    (princ (format " %s" (car flags)))
 728                  (setq i 0 len (length (car flags)))
 729                  (while (< i len)
 730                    (princ (format " %x" (aref (car flags) i)))
 731                    (setq i (1+ i))))
 732                (princ ",")
 733                (if (symbolp (cdr flags))
 734                    (princ (format "%s" (cdr flags)))
 735                  (setq i 0 len (length (cdr flags)))
 736                  (while (< i len)
 737                    (princ (format " %x" (aref (cdr flags) i)))
 738                    (setq i (1+ i))))))
 739             (t (princ 0)))
 740       (princ ":")
 741       (princ (coding-system-doc-string coding-system))
 742       (princ "\n"))))
 743
 744 ;;;###autoload
 745 (defun list-coding-systems (&optional arg)
 746   "Display a list of all coding systems.
 747 This shows the mnemonic letter, name, and description of each coding system.
 748
 749 With prefix ARG, the output format gets more cryptic,
 750 but still contains full information about each coding system."
 751   (interactive "P")
 752   (with-output-to-temp-buffer "*Help*"
 753     (list-coding-systems-1 arg)))
 754
 755 (defun list-coding-systems-1 (arg)
 756   (if (null arg)
 757       (princ "\
 758 ###############################################
 759 # List of coding systems in the following format:
 760 # MNEMONIC-LETTER -- CODING-SYSTEM-NAME
 761 #   DOC-STRING
 762 ")
 763     (princ "\
 764 #########################
 765 ## LIST OF CODING SYSTEMS
 766 ## Each line corresponds to one coding system
 767 ## Format of a line is:
 768 ##   NAME[,ALIAS...]:TYPE:MNEMONIC:EOL:FLAGS:POST-READ-CONVERSION
 769 ##      :PRE-WRITE-CONVERSION:DOC-STRING,
 770 ## where
 771 ##  NAME = coding system name
 772 ##  ALIAS = alias of the coding system
 773 ##  TYPE = nil (no conversion), t (undecided or automatic detection),
 774 ##         0 (EMACS-MULE), 1 (SJIS), 2 (ISO2022), 3 (BIG5), or 4 (CCL)
 775 ##  EOL = 0 (LF), 1 (CRLF), 2 (CR), or 3 (Automatic detection)
 776 ##  FLAGS =
 777 ##    if TYPE = 2 then
 778 ##      comma (`,') separated data of the following:
 779 ##        G0, G1, G2, G3, SHORT-FORM, ASCII-EOL, ASCII-CNTL, SEVEN,
 780 ##        LOCKING-SHIFT, SINGLE-SHIFT, USE-ROMAN, USE-OLDJIS, NO-ISO6429
 781 ##    else if TYPE = 4 then
 782 ##      comma (`,') separated CCL programs for read and write
 783 ##    else
 784 ##      0
 785 ##  POST-READ-CONVERSION, PRE-WRITE-CONVERSION = function name to be called
 786 ##
 787 "))
 788   (dolist (coding-system (sort-coding-systems (coding-system-list 'base-only)))
 789     (if (null arg)
 790         (print-coding-system-briefly coding-system 'tightly)
 791       (print-coding-system coding-system))))
 792
 793 ;; Fixme: delete?
 794 ;;;###autoload
 795 (defun list-coding-categories ()
 796   "Display a list of all coding categories."
 797   (with-output-to-temp-buffer "*Help*"
 798     (princ "\
 799 ############################
 800 ## LIST OF CODING CATEGORIES (ordered by priority)
 801 ## CATEGORY:CODING-SYSTEM
 802 ##
 803 ")
 804     (let ((l coding-category-list))
 805       (while l
 806         (princ (format "%s:%s\n" (car l) (symbol-value (car l))))
 807         (setq l (cdr l))))))
 808 \f
 809 ;;; FONT
 810
 811 (declare-function font-info "font.c" (name &optional frame))
 812
 813 (defun describe-font-internal (font-info &optional ignored)
 814   "Print information about a font in FONT-INFO.
 815 The IGNORED argument is ignored."
 816   (print-list "name (opened by):" (aref font-info 0))
 817   (print-list "       full name:" (aref font-info 1))
 818   (print-list "            size:" (format "%2d" (aref font-info 2)))
 819   (print-list "          height:" (format "%2d" (aref font-info 3)))
 820   (print-list " baseline-offset:" (format "%2d" (aref font-info 4)))
 821   (print-list "relative-compose:" (format "%2d" (aref font-info 5))))
 822
 823 ;;;###autoload
 824 (defun describe-font (fontname)
 825   "Display information about a font whose name is FONTNAME.
 826 The font must be already used by Emacs."
 827   (interactive "sFont name (default current choice for ASCII chars): ")
 828   (or (and window-system (fboundp 'fontset-list))
 829       (error "No fonts being used"))
 830   (let (font-info)
 831     (if (or (not fontname) (= (length fontname) 0))
 832         (setq fontname (face-attribute 'default :font)))
 833     (setq font-info (font-info fontname))
 834     (if (null font-info)
 835         (if (fontp fontname 'font-object)
 836             ;; The font should be surely used.  So, there's some
 837             ;; problem about getting information about it.  It is
 838             ;; better to print the fontname to show which font has
 839             ;; this problem.
 840             (message "No information about \"%s\"" (font-xlfd-name fontname))
 841           (message "No matching font found"))
 842       (with-output-to-temp-buffer "*Help*"
 843         (describe-font-internal font-info)))))
 844
 845 (defun print-fontset-element (val)
 846   ;; VAL has this format:
 847   ;;  ((REQUESTED-FONT-NAME OPENED-FONT-NAME ...) ...)
 848   ;; CHAR RANGE is already inserted.  Get character codes from
 849   ;; the current line.
 850   (beginning-of-line)
 851   (let ((from (following-char))
 852         (to (if (looking-at "[^.]*[.]* ")
 853                 (char-after (match-end 0)))))
 854     (if (re-search-forward "[ \t]*$" nil t)
 855         (delete-region (match-beginning 0) (match-end 0)))
 856
 857     ;; For non-ASCII characters, insert also CODE RANGE.
 858     (if (or (>= from 128) (and to (>= to 128)))
 859         (if to
 860             (insert (format " (#x%02X .. #x%02X)" from to))
 861           (insert (format " (#x%02X)" from))))
 862
 863     ;; Insert a requested font name.
 864     (dolist (elt val)
 865       (if (not elt)
 866           (insert "\n    -- inhibit fallback fonts --")
 867         (let ((requested (car elt)))
 868           (if (stringp requested)
 869               (insert "\n    " requested)
 870             (let (family registry weight slant width adstyle)
 871               (if (and (fboundp 'fontp) (fontp requested))
 872                   (setq family (font-get requested :family)
 873                         registry (font-get requested :registry)
 874                         weight (font-get requested :weight)
 875                         slant (font-get requested :slant)
 876                         width (font-get requested :width)
 877                         adstyle (font-get requested :adstyle))
 878                 (setq family (aref requested 0)
 879                       registry (aref requested 5)
 880                       weight (aref requested 1)
 881                       slant (aref requested 2)
 882                       width (aref requested 3)
 883                       adstyle (aref requested 4)))
 884               (if (not family)
 885                   (setq family "*-*")
 886                 (if (symbolp family)
 887                     (setq family (symbol-name family)))
 888                 (or (string-match "-" family)
 889                     (setq family (concat "*-" family))))
 890               (if (not registry)
 891                   (setq registry "*-*")
 892                 (if (symbolp registry)
 893                     (setq registry (symbol-name registry)))
 894                 (or (string-match "-" registry)
 895                     (= (aref registry (1- (length registry))) ?*)
 896                     (setq registry (concat registry "*"))))
 897               (insert (format"\n    -%s-%s-%s-%s-%s-*-*-*-*-*-*-%s"
 898                              family (or weight "*") (or slant "*") (or width "*")
 899                              (or adstyle "*") registry)))))
 900
 901         ;; Insert opened font names (if any).
 902         (if (and (boundp 'print-opened) (symbol-value 'print-opened))
 903             (dolist (opened (cdr elt))
 904               (insert "\n\t[" opened "]")))))))
 905
 906 (declare-function query-fontset "fontset.c" (pattern &optional regexpp))
 907 (declare-function fontset-info "fontset.c" (fontset &optional frame))
 908
 909 (defun print-fontset (fontset &optional print-opened)
 910   "Print information about FONTSET.
 911 FONTSET nil means the fontset of the selected frame, t means the
 912 default fontset.
 913 If optional arg PRINT-OPENED is non-nil, also print names of all opened
 914 fonts for FONTSET.  This function actually inserts the information in
 915 the current buffer."
 916   (if (eq fontset t)
 917       (setq fontset (query-fontset "fontset-default"))
 918     (if (eq fontset nil)
 919         (setq fontset (face-attribute 'default :fontset))))
 920   (beginning-of-line)
 921   (narrow-to-region (point) (point))
 922   (insert "Fontset: " fontset "\n")
 923   (insert (propertize "CHAR RANGE" 'face 'underline)
 924            " (" (propertize "CODE RANGE" 'face 'underline) ")\n")
 925   (insert "    " (propertize "FONT NAME" 'face 'underline)
 926           " (" (propertize "REQUESTED" 'face 'underline)
 927           " and [" (propertize "OPENED" 'face 'underline) "])")
 928   (let* ((info (fontset-info fontset))
 929          (default-info (char-table-extra-slot info 0))
 930          start1 end1 start2 end2)
 931     (describe-vector info 'print-fontset-element)
 932     (when (char-table-range info nil)
 933       ;; The default of FONTSET is described.
 934       (setq start1 (re-search-backward "^default"))
 935       (delete-region (point) (line-end-position))
 936       (insert "\n  ---<fallback to the default of the specified fontset>---")
 937       (put-text-property (line-beginning-position) (point) 'face 'highlight)
 938       (goto-char (point-max))
 939       (setq end1 (setq start2 (point))))
 940     (when default-info
 941       (insert "\n  ---<fallback to the default fontset>---")
 942       (put-text-property (line-beginning-position) (point) 'face 'highlight)
 943       (describe-vector default-info 'print-fontset-element)
 944       (when (char-table-range default-info nil)
 945         ;; The default of the default fontset is described.
 946         (setq end2 (re-search-backward "^default"))
 947         (delete-region (point) (line-end-position))
 948         (insert "\n  ---<fallback to the default of the default fontset>---")
 949         (put-text-property (line-beginning-position) (point) 'face 'highlight)))
 950       (if (and start1 end2)
 951           ;; Reoder the printed information to match with the font
 952           ;; searching strategy; i.e. FONTSET, the default fontset,
 953           ;; default of FONTSET, default of the default fontset.
 954           (transpose-regions start1 end1 start2 end2))
 955       (goto-char (point-max)))
 956   (widen))
 957
 958 (defvar fontset-alias-alist)
 959 (declare-function fontset-list "fontset.c" ())
 960
 961 ;;;###autoload
 962 (defun describe-fontset (fontset)
 963   "Display information about FONTSET.
 964 This shows which font is used for which character(s)."
 965   (interactive
 966    (if (not (and window-system (fboundp 'fontset-list)))
 967        (error "No fontsets being used")
 968      (let ((fontset-list (nconc
 969                           (fontset-list)
 970                           (mapcar 'cdr fontset-alias-alist)))
 971            (completion-ignore-case t))
 972        (list (completing-read
 973               "Fontset (default used by the current frame): "
 974               fontset-list nil t)))))
 975   (if (= (length fontset) 0)
 976       (setq fontset (face-attribute 'default :fontset))
 977     (setq fontset (query-fontset fontset)))
 978   (help-setup-xref (list #'describe-fontset fontset) (interactive-p))
 979   (with-output-to-temp-buffer (help-buffer)
 980     (with-current-buffer standard-output
 981       (print-fontset fontset t))))
 982
 983 (declare-function fontset-plain-name "fontset" (fontset))
 984
 985 ;;;###autoload
 986 (defun list-fontsets (arg)
 987   "Display a list of all fontsets.
 988 This shows the name, size, and style of each fontset.
 989 With prefix arg, also list the fonts contained in each fontset;
 990 see the function `describe-fontset' for the format of the list."
 991   (interactive "P")
 992   (if (not (and window-system (fboundp 'fontset-list)))
 993       (error "No fontsets being used")
 994     (help-setup-xref (list #'list-fontsets arg) (interactive-p))
 995     (with-output-to-temp-buffer (help-buffer)
 996       (with-current-buffer standard-output
 997         ;; This code is duplicated near the end of mule-diag.
 998         (let ((fontsets
 999                (sort (fontset-list)
1000                      (lambda (x y)
1001                        (string< (fontset-plain-name x)
1002                                 (fontset-plain-name y))))))
1003           (while fontsets
1004             (if arg
1005                 (print-fontset (car fontsets) nil)
1006               (insert "Fontset: " (car fontsets) "\n"))
1007             (setq fontsets (cdr fontsets))))))))
1008 \f
1009 ;;;###autoload
1010 (defun list-input-methods ()
1011   "Display information about all input methods."
1012   (interactive)
1013   (help-setup-xref '(list-input-methods) (interactive-p))
1014   (with-output-to-temp-buffer (help-buffer)
1015     (list-input-methods-1)
1016     (with-current-buffer standard-output
1017       (save-excursion
1018         (goto-char (point-min))
1019         (while (re-search-forward
1020                 "^  \\([^ ]+\\) (`.*' in mode line)$" nil t)
1021           (help-xref-button 1 'help-input-method (match-string 1)))))))
1022
1023 (defun list-input-methods-1 ()
1024   (if (not input-method-alist)
1025       (princ "
1026 No input method is available, perhaps because you have not
1027 installed LEIM (Libraries of Emacs Input Methods).")
1028     (princ "LANGUAGE\n  NAME (`TITLE' in mode line)\n")
1029     (princ "    SHORT-DESCRIPTION\n------------------------------\n")
1030     (setq input-method-alist
1031           (sort input-method-alist
1032                 (lambda (x y) (string< (nth 1 x) (nth 1 y)))))
1033
1034     (let (language)
1035       (dolist (elt input-method-alist)
1036         (when (not (equal language (nth 1 elt)))
1037           (setq language (nth 1 elt))
1038           (princ language)
1039           (terpri))
1040         (princ (format "  %s (`%s' in mode line)\n    %s\n"
1041                        (car elt)
1042                        (let ((title (nth 3 elt)))
1043                          (if (and (consp title) (stringp (car title)))
1044                              (car title)
1045                            title))
1046                        (nth 4 elt)))))))
1047 \f
1048 ;;; DIAGNOSIS
1049
1050 ;; Insert a header of a section with SECTION-NUMBER and TITLE.
1051 (defun insert-section (section-number title)
1052   (insert "########################################\n"
1053           "# Section " (format "%d" section-number) ".  " title "\n"
1054           "########################################\n\n"))
1055
1056 ;;;###autoload
1057 (defun mule-diag ()
1058   "Display diagnosis of the multilingual environment (Mule).
1059
1060 This shows various information related to the current multilingual
1061 environment, including lists of input methods, coding systems,
1062 character sets, and fontsets (if Emacs is running under a window
1063 system which uses fontsets)."
1064   (interactive)
1065   (with-output-to-temp-buffer "*Mule-Diagnosis*"
1066     (with-current-buffer standard-output
1067       (insert "###############################################\n"
1068               "### Current Status of Multilingual Features ###\n"
1069               "###############################################\n\n"
1070               "CONTENTS: Section 1.  General Information\n"
1071               "          Section 2.  Display\n"
1072               "          Section 3.  Input methods\n"
1073               "          Section 4.  Coding systems\n"
1074               "          Section 5.  Character sets\n")
1075       (if (and window-system (fboundp 'fontset-list))
1076           (insert "          Section 6.  Fontsets\n"))
1077       (insert "\n")
1078
1079       (insert-section 1 "General Information")
1080       (insert "Version of this emacs:\n  " (emacs-version) "\n\n")
1081       (insert "Configuration options:\n  " system-configuration-options "\n\n")
1082       (insert "Multibyte characters awareness:\n"
1083               (format "  default: %S\n" default-enable-multibyte-characters)
1084               (format "  current-buffer: %S\n\n" enable-multibyte-characters))
1085       (insert "Current language environment: " current-language-environment
1086               "\n\n")
1087
1088       (insert-section 2 "Display")
1089       (if window-system
1090           (insert (format "Window-system: %s, version %s"
1091                           window-system window-system-version))
1092         (insert "Terminal: " (getenv "TERM")))
1093       (insert "\n\n")
1094
1095       (if window-system
1096           (let ((font (cdr (assq 'font (frame-parameters)))))
1097             (insert "The font and fontset of the selected frame are:\n"
1098                     "     font: " font "\n"
1099                     "  fontset: " (face-attribute 'default :fontset) "\n"))
1100         (insert "Coding system of the terminal: "
1101                 (symbol-name (terminal-coding-system))))
1102       (insert "\n\n")
1103
1104       (insert-section 3 "Input methods")
1105       (list-input-methods-1)
1106       (insert "\n")
1107       (if default-input-method
1108           (insert (format "Default input method: %s\n" default-input-method))
1109         (insert "No default input method is specified\n"))
1110
1111       (insert-section 4 "Coding systems")
1112       (list-coding-systems-1 t)
1113       (insert "\n")
1114
1115       (insert-section 5 "Character sets")
1116       (list-character-sets-2)
1117       (insert "\n")
1118
1119       (when (and window-system (fboundp 'fontset-list))
1120         ;; This code duplicates most of list-fontsets.
1121         (insert-section 6 "Fontsets")
1122         (insert "Fontset-Name\t\t\t\t\t\t  WDxHT Style\n")
1123         (insert "------------\t\t\t\t\t\t  ----- -----\n")
1124         (dolist (fontset (fontset-list))
1125           (print-fontset fontset t)))
1126       (print-help-return-message))))
1127
1128 ;;;###autoload
1129 (defun font-show-log (&optional limit)
1130   "Show log of font listing and opening.
1131 Prefix arg LIMIT says how many fonts to show for each listing.
1132 The default is 20.  If LIMIT is negative, do not limit the listing."
1133   (interactive "P")
1134   (setq limit (if limit (prefix-numeric-value limit) 20))
1135   (if (eq font-log t)
1136       (message "Font logging is currently suppressed")
1137     (with-output-to-temp-buffer "*Help*"
1138       (set-buffer standard-output)
1139       (dolist (elt (reverse font-log))
1140         (insert (format "%s: %s\n" (car elt) (cadr elt)))
1141         (setq elt (nth 2 elt))
1142         (if (or (vectorp elt) (listp elt))
1143             (let ((i 0))
1144               (catch 'tag
1145                 (mapc #'(lambda (x)
1146                           (setq i (1+ i))
1147                           (when (= i limit)
1148                             (insert "  ...\n")
1149                             (throw 'tag nil))
1150                           (insert (format "  %s\n" x)))
1151                       elt)))
1152           (insert (format "  %s\n" elt)))))))
1153
1154
1155 (provide 'mule-diag)
1156
1157 ;; arch-tag: cd3b607c-2893-45a0-a4fa-a6535754dbee
1158 ;;; mule-diag.el ends here