;; mule-diag.el -- show diagnosis of multilingual environment (MULE)

;; Copyright (C) 1995 Free Software Foundation, Inc.
;; Copyright (C) 1995 Electrotechnical Laboratory, JAPAN.

;; Keywords: multilingual, charset, coding system, fontset, diagnosis

;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; General utility function

;; Print all arguments with single space separator in one line.
(defun print-list (&rest args)
  (while (cdr args)
    (if (car args)
	(progn (princ (car args)) (princ " ")))
    (setq args (cdr args)))
  (princ (car args))
  (princ "\n"))

;;; CHARSET

;;;###autoload
(defun list-character-sets ()
  "Display a list of all charsets."
  (interactive)
  (with-output-to-temp-buffer "*Help*"
    (print-character-sets)))

(defvar charset-other-info-func nil)
  
(defun print-character-sets ()
  "Print information on all charsets in a machine readable format."
  (princ "\
#########################
## LIST OF CHARSETS
## Each line corresponds to one charset.
## The following attributes are listed in this order
## separated by a colon `:' in one line.
##	CHARSET-SYMBOL-NAME,
##	CHARSET-ID,
##	DIMENSION (1 or 2)
##	CHARS (94 or 96)
##	BYTES (of multibyte form: 1, 2, 3, or 4),
##	WIDTH (occupied column numbers: 1 or 2),
##	DIRECTION (0:left-to-right, 1:right-to-left),
##	ISO-FINAL-CHAR (character code of ISO-2022's final character)
##	ISO-GRAPHIC-PLANE (ISO-2022's graphic plane, 0:GL, 1:GR)
##	DESCRIPTION (describing string of the charset)
")
  (let ((charsets charset-list)
	charset)
    (while charsets
      (setq charset (car charsets))
      (princ (format "%s:%03d:%d:%d:%d:%d:%d:%d:%d:%s\n" 
		     charset
		     (charset-id charset)
		     (charset-dimension charset)
		     (charset-chars charset)
		     (charset-bytes charset)
		     (charset-width charset)
		     (charset-direction charset)
		     (charset-iso-final-char charset)
		     (charset-iso-graphic-plane charset)
		     (charset-description charset)))
      (setq charsets (cdr charsets)))))


;;; CODING-SYSTEM

;; Print information of designation of each graphic register in FLAGS
;; in human readable format.  See the documentation of
;; `make-coding-system' for the meaning of FLAGS.
(defun print-designation (flags)
  (let ((graphic-register 0)
	charset)
    (while (< graphic-register 4)
      (setq charset (aref flags graphic-register))
      (princ (format
	      "  G%d -- %s\n"
	      graphic-register
	      (cond ((null charset)
		     "never used")
		    ((eq charset t)
		     "no initial designation, and used by any charsets")
		    ((symbolp charset)
		     (format "%s:%s"
			     charset (charset-description charset)))
		    ((listp charset)
		     (if (charsetp (car charset))
			 (format "%s:%s, and also used by the followings:"
				 (car charset)
				 (charset-description (car charset)))
		       "no initial designation, and used by the followings:"))
		    (t
		     "invalid designation information"))))
      (if (listp charset)
	  (progn
	    (setq charset (cdr charset))
	    (while charset
	      (cond ((eq (car charset) t)
		     (princ "\tany other charsets\n"))
		    ((charsetp (car charset))
		     (princ (format "\t%s:%s\n"
				    (car charset)
				    (charset-description (car charset)))))
		    (t
		     "invalid designation information"))		   
	      (setq charset (cdr charset)))))
      (setq graphic-register (1+ graphic-register)))))

;;;###autoload
(defun describe-coding-system (coding-system)
  "Display information of CODING-SYSTEM."
  (interactive "zCoding-system: ")
  (check-coding-system coding-system)
  (with-output-to-temp-buffer "*Help*"
    (let ((coding-vector (coding-system-vector coding-system)))
      (princ "Coding-system ")
      (princ coding-system)
      (princ " [")
      (princ (char-to-string (coding-vector-mnemonic coding-vector)))
      (princ "]: \n")
      (princ "  ")
      (princ (coding-vector-docstring coding-vector))
      (princ "\nType: ")
      (let ((type (coding-vector-type coding-vector))
	    (flags (coding-vector-flags coding-vector)))
	(princ type)
	(princ ", which means ")
	(cond ((eq type nil)
	       (princ "do no conversion."))
	      ((eq type t)
	       (princ "do automatic conversion."))
	      ((eq type 0)
	       (princ "Emacs internal multibyte form."))
	      ((eq type 1)
	       (princ "Shift-JIS (MS-KANJI)."))
	      ((eq type 2)
	       (princ "a variant of ISO-2022.\n")
	       (princ "Initial designations:\n")
	       (print-designation flags)
	       (princ "Other Form: \n")
	       (princ (if (aref flags 4) "short-form" "long-form"))
	       (if (aref flags 5) (princ ", ASCII@EOL"))
	       (if (aref flags 6) (princ ", ASCII@CNTL"))
	       (princ (if (aref flags 7) ", 7-bit" ", 8-bit"))
	       (if (aref flags 8) (princ ", use-locking-shift"))
	       (if (aref flags 9) (princ ", use-single-shift"))
	       (if (aref flags 10) (princ ", use-roman"))
	       (if (aref flags 10) (princ ", use-old-jis"))
	       (if (aref flags 11) (princ ", no-ISO6429"))
	       (princ "."))
	      ((eq type 3)
	       (princ "Big5."))
	      ((eq type 4)
	       (princ "do conversion by CCL program."))
	      (t (princ "invalid coding-system."))))
      (princ "\nEOL-Type: ")
      (let ((eol-type (coding-system-eoltype coding-system)))
	(cond ((vectorp eol-type)
	       (princ "Automatic selection from ")
	       (princ eol-type)
	       (princ "\n"))
	      ((or (null eol-type) (eq eol-type 0)) (princ "LF\n"))
	      ((eq eol-type 1) (princ "CRLF\n"))
	      ((eq eol-type 2) (princ "CR\n"))
	      (t (princ "invalid\n"))))
      )))

;;;###autoload
(defun describe-current-coding-system-briefly ()
  "Display coding systems currently used in a brief format in mini-buffer.

The format is \"current: [FKTPp=........] default: [FPp=......]\",
where mnemonics of the following coding systems come in this order
at the place of `...':
  buffer-file-coding-system (of the current buffer)
  eol-type of buffer-file-coding-system (of the current buffer)
  keyboard-coding-system
  terminal-coding-system
  process-coding-system for read (of the current buffer, if any)
  eol-type of process-coding-system for read (of the current buffer, if any)
  process-coding-system for write (of the current buffer, if any)
  eol-type of process-coding-system for write (of the current buffer, if any)
  default buffer-file-coding-system
  eol-type of default buffer-file-coding-system
  default process-coding-system for read
  default eol-type of process-coding-system for read
  default process-coding-system for write
  default eol-type of process-coding-system"
  (interactive)
  (let* ((proc (get-buffer-process (current-buffer)))
	 (process-coding-systems (if proc (process-coding-system proc))))
    (message
     "current: [FKTPp=%c%c%c%c%c%c%c%c] default: [FPp=%c%c%c%c%c%c]"
     (coding-system-mnemonic buffer-file-coding-system)
     (coding-system-eoltype-mnemonic buffer-file-coding-system)
     (coding-system-mnemonic (keyboard-coding-system))
     (coding-system-mnemonic (terminal-coding-system))
     (coding-system-mnemonic (car process-coding-systems))
     (coding-system-eoltype-mnemonic (car process-coding-systems))
     (coding-system-mnemonic (cdr process-coding-systems))
     (coding-system-eoltype-mnemonic (cdr process-coding-systems))
     (coding-system-mnemonic (default-value 'buffer-file-coding-system))
     (coding-system-eoltype-mnemonic (default-value 'buffer-file-coding-system))
     (coding-system-mnemonic (car default-process-coding-system))
     (coding-system-eoltype-mnemonic (car default-process-coding-system))
     (coding-system-mnemonic (cdr default-process-coding-system))
     (coding-system-eoltype-mnemonic (cdr default-process-coding-system))
     )))

;; Print symbol name and mnemonics of CODING-SYSTEM by `princ'.
(defsubst print-coding-system-briefly (coding-system)
  (print-list ":"
	      coding-system
	      (format "[%c%c]"
		      (coding-system-mnemonic coding-system)
		      (coding-system-eoltype-mnemonic coding-system))))

;;;###autoload
(defun describe-current-coding-system ()
  "Display coding systems currently used in a detailed format."
  (interactive)
  (with-output-to-temp-buffer "*Help*"
    (let* ((proc (get-buffer-process (current-buffer)))
	   (process-coding-systems (if proc (process-coding-system proc))))
      (princ "Current:\n  buffer-file-coding-system")
      (print-coding-system-briefly buffer-file-coding-system)
      (princ "  keyboard-coding-system")
      (print-coding-system-briefly (keyboard-coding-system))
      (princ "  terminal-coding-system")
      (print-coding-system-briefly (terminal-coding-system))
      (if process-coding-systems
	  (progn (princ "  process-coding-system (read)")
		 (print-coding-system-briefly (car process-coding-systems))
		 (princ "  process-coding-system (write)")
		 (print-coding-system-briefly (cdr process-coding-systems))))
      (princ "Default:\n  buffer-file-coding-system")
      (print-coding-system-briefly (default-value 'buffer-file-coding-system))
      (princ "  process-coding-system (read)")
      (print-coding-system-briefly (car default-process-coding-system))
      (princ "  process-coding-system (write)")
      (print-coding-system-briefly (cdr default-process-coding-system))
      (princ "coding-system-alist:\n")
      (pp coding-system-alist))
    (let ((l coding-category-list))
      (princ "\nCoding categories (in the order of priority):\n")
      (while l
	(princ (format "%s -> %s\n" (car l) (symbol-value (car l))))
	(setq l (cdr l))))))

;; Print detailed information on CODING-SYSTEM.
(defun print-coding-system (coding-system)
  (let ((type (coding-system-type coding-system))
	(eol-type (coding-system-eoltype coding-system))
	(flags (coding-system-flags coding-system)))
    (princ (format "%s:%s:%c:%d:"
		   coding-system
		   type
		   (coding-system-mnemonic coding-system)
		   (if (integerp eol-type) eol-type 3)))
    (cond ((eq type 2)			; ISO-2022
	   (let ((idx 0)
		 charset)
	     (while (< idx 4)
	       (setq charset (aref flags idx))
	       (cond ((null charset)
		      (princ -1))
		     ((eq charset t)
		      (princ -2))
		     ((charsetp charset)
		      (princ charset))
		     ((listp charset)
		      (princ "(")
		      (princ (car charset))
		      (setq charset (cdr charset))
		      (while charset
			(princ ",")
			(princ (car charset))
			(setq charset (cdr charset)))
		      (princ ")")))
	       (princ ",")
	       (setq idx (1+ idx)))
	     (while (< idx 12)
	       (princ (if (aref flags idx) 1 0))
	       (princ ",")
	       (setq idx (1+ idx)))
	     (princ (if (aref flags idx) 1 0))))
	  ((eq type 4)			; CCL
	   (let (i len)
	     (setq i 0 len (length (car flags)))
	     (while (< i len)
	       (princ (format " %x" (aref (car flags) i)))
	       (setq i (1+ i)))
	     (princ ",")
	     (setq i 0 len (length (cdr flags)))
	     (while (< i len)
	       (princ (format " %x" (aref (cdr flags) i)))
	       (setq i (1+ i)))))
	  (t (princ 0)))
    (princ ":")
    (princ (coding-system-docstring coding-system))
    (princ "\n")))

(defun list-coding-systems ()
  "Print information on all coding systems in a machine readable format."
  (with-output-to-temp-buffer "*Help*"
    (princ "\
#########################
## LIST OF CODING SYSTEMS
## Each line corresponds to one coding system
## Format of a line is:
##   NAME:TYPE:MNEMONIC:EOL:FLAGS:DOCSTRING,
## where
##  TYPE = nil (no conversion), t (auto conversion),
##         0 (Mule internal), 1 (SJIS), 2 (ISO2022), 3 (BIG5), or 4 (CCL)
##  EOL = 0 (LF), 1 (CRLF), 2 (CR), or 3 (Automatic detection)
##  FLAGS =
##    if TYPE = 2 then
##      comma (`,') separated data of the followings:
##        G0, G1, G2, G3, SHORT-FORM, ASCII-EOL, ASCII-CNTL, SEVEN,
##        LOCKING-SHIFT, SINGLE-SHIFT, USE-ROMAN, USE-OLDJIS, NO-ISO6429
##    else if TYPE = 4 then
##      comma (`,') separated CCL programs for read and write
##    else
##      0
##
")
    (let ((codings (make-vector 7 nil)))
      (mapatoms
       (function
	(lambda (arg)
	  (if (and arg
		   (coding-system-p arg)
		   (null (get arg 'pre-write-conversion))
		   (null (get arg 'post-read-conversion)))
	      (let* ((type (coding-system-type arg))
		     (idx (if (null type) 0 (if (eq type t) 1 (+ type 2)))))
		(if (or (= idx 0)
			(vectorp (coding-system-eoltype arg)))
		    (aset codings idx (cons arg (aref codings idx)))))))))
      (let ((idx 0) elt)
	(while (< idx 7)
	  (setq elt (aref codings idx))
	  (while elt
	    (print-coding-system (car elt))
	    (setq elt (cdr elt)))
	  (setq idx (1+ idx)))))
    (princ "\
############################
## LIST OF CODING CATEGORIES (ordered by priority)
## CATEGORY:CODING-SYSTEM
##
")
    (let ((l coding-category-list))
      (while l
	(princ (format "%s:%s\n" (car l) (symbol-value (car l))))
	(setq l (cdr l))))
    ))

;;; FONT

;; Print information of a font in FONTINFO.
(defun describe-font-internal (font-info &optional verbose)
  (print-list "name (opened by):" (aref font-info 0))
  (print-list "       full name:" (aref font-info 1))
  (let ((charset (aref font-info 2)))
    (print-list "   charset:"
		(format "%s (%s)" charset (charset-description charset))))
  (print-list "            size:" (format "%d" (aref font-info 3)))
  (print-list "          height:" (format "%d" (aref font-info 4)))
  (print-list " baseline-offset:" (format "%d" (aref font-info 5)))
  (print-list "relative-compose:" (format "%d" (aref font-info 6))))

;;;###autoload
(defun describe-font (fontname)
  "Display information about fonts which partially match FONTNAME."
  (interactive "sFontname: ")
  (or window-system
      (error "No window system being used"))
  (let ((font-info (font-info fontname)))
    (if (null font-info)
	(message "No matching font")
      (with-output-to-temp-buffer "*Help*"
	(describe-font-internal font-info 'verbose)))))

;; Print information in FONTINFO of a fontset named FONTSET.
(defun describe-fontset-internal (fontset fontset-info)
  (print-list "Fontset:" fontset)
  (let ((size (aref fontset-info 0)))
    (print-list "  size:" (format "%d" size)
		(if (= size 0) "... which means not yet used" "")))
  (print-list "  height:" (format "%d" (aref fontset-info 1)))
  (print-list "  fonts: (charset : font name)")
  (let* ((fonts (aref fontset-info 2))
	 elt charset requested opened)
    (while fonts
      (setq elt (car fonts)
	    charset (car elt)
	    requested (nth 1 elt)
	    opened (nth 2 elt))
      (print-list "   " charset ":" requested)
      (if (stringp opened)
	  (print-list "      Opened as: " opened)
	(if (null opened) "      -- open failed --"))
      (setq fonts (cdr fonts)))))

;;;###autoload
(defun describe-fontset (fontset)
  "Display information about FONTSET."
  (interactive
   (if (not window-system)
       (error "No window system being used")
     (let ((fontset-list (mapcar '(lambda (x) (list x)) (fontset-list))))
       (list (completing-read "Fontset: " fontset-list)))))
  (setq fontset (query-fontset fontset))
  (if (null fontset)
      (error "No matching fontset")
    (let ((fontset-info (fontset-info fontset)))
      (with-output-to-temp-buffer "*Help*"
	(describe-fontset-internal fontset fontset-info)))))


;;; DIAGNOSIS

(defun insert-list (args)
  (while (cdr args)
    (insert (or (car args) "nil") " ")
    (setq args (cdr args)))
  (if args (insert (or (car args) "nil")))
  (insert "\n"))

(defun insert-section (sec title)
  (insert "########################################\n"
	  "# Section " (format "%d" sec) ".  " title "\n"
	  "########################################\n\n"))

;;;###autoload
(defun mule-diag ()
  "Show diagnosis of the running Mule."
  (interactive)
  (let ((buf (get-buffer-create "*Diagnosis*")))
    (save-excursion
      (set-buffer buf)
      (erase-buffer)
      (insert "\t###############################\n"
	      "\t### Diagnosis of your Emacs ###\n"
	      "\t###############################\n\n"
	      "CONTENTS: Section 1.  General Information\n"
	      "          Section 2.  Display\n"
	      "          Section 3.  Input methods\n"
	      "          Section 4.  Coding systems\n"
	      "          Section 5.  Charsets\n")
      (if window-system
	  (insert "          Section 6.  Fontset list\n"))
      (insert "\n")

      (insert-section 1 "General Information")
      (insert "Version of this emacs:\n  " (emacs-version) "\n"
	      "Primary language:\n  " primary-language "\n\n")

      (insert-section 2 "Display")
      (if window-system
	  (insert "Window-system: "
		  (symbol-name window-system)
		  (format "%s" window-system-version))
	(insert "Terminal: " (getenv "TERM")))
      (insert "\n\n")

      (if (eq window-system 'x)
	  (let ((font (cdr (assq 'font (frame-parameters)))))
	    (insert "The selected frame is using the "
		    (if (query-fontset font) "fontset" "font")
		    ":\n\t" font))
	(insert "Coding system of the terminal: "
		(symbol-name (terminal-coding-system))))
      (insert "\n\n")

      (insert-section 3 "Input methods")
      (insert "language\tinput-method\n"
	      "--------\t------------\n")
      (let ((alist language-info-alist))
	(while alist
	  (insert (car (car alist)))
	  (indent-to 16)
	  (let ((methods (get-language-info (car (car alist)) 'input-method)))
	    (if methods
		(insert-list (mapcar 'car methods))
	      (insert "none\n")))
	  (setq alist (cdr alist))))
      (insert "\n")
      (if default-input-method
	  (insert "The input method used last time is: "
		  (cdr default-input-method)
		  "\n"
		  "        for inputting the language: "
		  (car default-input-method)
		  "\n")
	(insert "No input method has ever been selected.\n"))
      
      (insert "\n")

      (insert-section 4 "Coding systems")
      (save-excursion (list-coding-systems))
      (insert-buffer "*Help*")
      (goto-char (point-max))
      (insert "\n")

      (insert-section 5 "Charsets")
      (save-excursion (list-character-sets))
      (insert-buffer "*Help*")
      (goto-char (point-max))
      (insert "\n")

      (if window-system
	  (let ((fontsets (fontset-list)))
	    (insert-section 6 "Fontset list")
	    (while fontsets
	      (describe-fontset (car fontsets))
	      (insert-buffer "*Help*")
	      (setq fontsets (cdr fontsets)))))

      (set-buffer-modified-p nil)
      )
    (let ((win (display-buffer buf)))
      (set-window-point win 1)
      (set-window-start win 1))
    ))


;;; DUMP DATA FILE

;;;###autoload
(defun dump-charsets ()
  "Dump information of all charsets into the file \"charsets.dat\"."
  (list-character-sets)
  (set-buffer (get-buffer "*Help*"))
  (let (make-backup-files)
    (write-region (point-min) (point-max) "charsets.dat"))
  (kill-emacs))

;;;###autoload
(defun dump-codings ()
  "Dump information of all coding systems into the file \"codings.dat\"."
  (list-coding-systems)
  (set-buffer (get-buffer "*Help*"))
  (let (make-backup-files)
    (write-region (point-min) (point-max) "codings.dat"))
  (kill-emacs))