;;; descr-text.el --- describe text mode
-;; Copyright (c) 1994, 1995, 1996, 2001, 2002 Free Software Foundation, Inc.
+;; Copyright (c) 1994, 1995, 1996, 2001, 02, 03 Free Software Foundation, Inc.
;; Author: Boris Goldowsky <boris@gnu.org>
;; Keywords: faces
;;; Code:
+(eval-when-compile (require 'button))
+
(defun describe-text-done ()
"Delete the current window or bury the current buffer."
(interactive)
(widget-insert "There are text properties here:\n")
(describe-property-list properties)))))
+(defcustom unicodedata-file nil
+ "Location of Unicode data file.
+This is the UnicodeData.txt file from the Unicode consortium, used for
+diagnostics. If it is non-nil `describe-char-after' will print data
+looked up from it. This facility is mostly of use to people doing
+multilingual development.
+
+This is a fairly large file, not typically present on GNU systems. At
+the time of writing it is at
+<URL:ftp://www.unicode.org/Public/UNIDATA/UnicodeData.txt>."
+ :group 'mule
+ :version "21.5"
+ :type '(choice (const :tag "None" nil)
+ file))
+
+;; We could convert the unidata file into a Lispy form once-for-all
+;; and distribute it for loading on demand. It might be made more
+;; space-efficient by splitting strings word-wise and replacing them
+;; with lists of symbols interned in a private obarray, e.g.
+;; "LATIN SMALL LETTER A" => '(LATIN SMALL LETTER A).
+
+;; Fixme: Check whether this needs updating for Unicode 4.
+(defun unicode-data (char)
+ "Return a list of Unicode data for unicode CHAR.
+Each element is a list of a property description and the property value.
+The list is null if CHAR isn't found in `unicodedata-file'."
+ (when unicodedata-file
+ (unless (file-exists-p unicodedata-file)
+ (error "`unicodedata-file' %s not found" unicodedata-file))
+ (save-excursion
+ ;; Find file in fundamental mode to avoid, e.g. flyspell turned
+ ;; on for .txt. Don't use RAWFILE arg in case of DOS line endings.
+ (set-buffer (let ((auto-mode-alist))
+ (find-file-noselect unicodedata-file)))
+ (goto-char (point-min))
+ (let ((hex (format "%04X" char))
+ found first last)
+ (if (re-search-forward (concat "^" hex) nil t)
+ (setq found t)
+ ;; It's not listed explicitly. Look for ranges, e.g. CJK
+ ;; ideographs, and check whether it's in one of them.
+ (while (and (re-search-forward "^\\([^;]+\\);[^;]+First>;" nil t)
+ (>= char (setq first
+ (string-to-number (match-string 1) 16)))
+ (progn
+ (forward-line 1)
+ (looking-at "^\\([^;]+\\);[^;]+Last>;")
+ (> char
+ (setq last
+ (string-to-number (match-string 1) 16))))))
+ (if (and (>= char first)
+ (<= char last))
+ (setq found t)))
+ (if found
+ (let ((fields (mapcar (lambda (elt)
+ (if (> (length elt) 0)
+ elt))
+ (cdr (split-string
+ (buffer-substring
+ (line-beginning-position)
+ (line-end-position))
+ ";")))))
+ ;; The length depends on whether the last field was empty.
+ (unless (or (= 13 (length fields))
+ (= 14 (length fields)))
+ (error "Invalid contents in %s" unicodedata-file))
+ ;; The field names and values lists are slightly
+ ;; modified from Mule-UCS unidata.el.
+ (list
+ (list "Name" (let ((name (nth 0 fields)))
+ ;; Check for <..., First>, <..., Last>
+ (if (string-match "\\`\\(<[^,]+\\)," name)
+ (concat (match-string 1 name) ">")
+ name)))
+ (list "Category"
+ (cdr (assoc
+ (nth 1 fields)
+ '(("Lu" . "uppercase letter")
+ ("Ll" . "lowercase letter")
+ ("Lt" . "titlecase letter")
+ ("Mn" . "non-spacing mark")
+ ("Mc" . "spacing-combining mark")
+ ("Me" . "enclosing mark")
+ ("Nd" . "decimal digit")
+ ("Nl" . "letter number")
+ ("No" . "other number")
+ ("Zs" . "space separator")
+ ("Zl" . "line separator")
+ ("Zp" . "paragraph separator")
+ ("Cc" . "other control")
+ ("Cf" . "other format")
+ ("Cs" . "surrogate")
+ ("Co" . "private use")
+ ("Cn" . "not assigned")
+ ("Lm" . "modifier letter")
+ ("Lo" . "other letter")
+ ("Pc" . "connector punctuation")
+ ("Pd" . "dash punctuation")
+ ("Ps" . "open punctuation")
+ ("Pe" . "close punctuation")
+ ("Pi" . "initial-quotation punctuation")
+ ("Pf" . "final-quotation punctuation")
+ ("Po" . "other punctuation")
+ ("Sm" . "math symbol")
+ ("Sc" . "currency symbol")
+ ("Sk" . "modifier symbol")
+ ("So" . "other symbol")))))
+ (list "Combining class"
+ (cdr (assoc
+ (string-to-number (nth 2 fields))
+ '((0 . "Spacing")
+ (1 . "Overlays and interior")
+ (7 . "Nuktas")
+ (8 . "Hiragana/Katakana voicing marks")
+ (9 . "Viramas")
+ (10 . "Start of fixed position classes")
+ (199 . "End of fixed position classes")
+ (200 . "Below left attached")
+ (202 . "Below attached")
+ (204 . "Below right attached")
+ (208 . "Left attached (reordrant around \
+single base character)")
+ (210 . "Right attached")
+ (212 . "Above left attached")
+ (214 . "Above attached")
+ (216 . "Above right attached")
+ (218 . "Below left")
+ (220 . "Below")
+ (222 . "Below right")
+ (224 . "Left (reordrant around single base \
+character)")
+ (226 . "Right")
+ (228 . "Above left")
+ (230 . "Above")
+ (232 . "Above right")
+ (233 . "Double below")
+ (234 . "Double above")
+ (240 . "Below (iota subscript)")))))
+ (list "Bidi category"
+ (cdr (assoc
+ (nth 3 fields)
+ '(("L" . "Left-to-Right")
+ ("LRE" . "Left-to-Right Embedding")
+ ("LRO" . "Left-to-Right Override")
+ ("R" . "Right-to-Left")
+ ("AL" . "Right-to-Left Arabic")
+ ("RLE" . "Right-to-Left Embedding")
+ ("RLO" . "Right-to-Left Override")
+ ("PDF" . "Pop Directional Format")
+ ("EN" . "European Number")
+ ("ES" . "European Number Separator")
+ ("ET" . "European Number Terminator")
+ ("AN" . "Arabic Number")
+ ("CS" . "Common Number Separator")
+ ("NSM" . "Non-Spacing Mark")
+ ("BN" . "Boundary Neutral")
+ ("B" . "Paragraph Separator")
+ ("S" . "Segment Separator")
+ ("WS" . "Whitespace")
+ ("ON" . "Other Neutrals")))))
+ (list
+ "Decomposition"
+ (if (nth 4 fields)
+ (let* ((parts (split-string (nth 4 fields)))
+ (info (car parts)))
+ (if (string-match "\\`<\\(.+\\)>\\'" info)
+ (setq info (match-string 1 info))
+ (setq info nil))
+ (if info (setq parts (cdr parts)))
+ ;; Maybe printing ? for unrepresentable unicodes
+ ;; here and below should be changed?
+ (setq parts (mapconcat
+ (lambda (arg)
+ (string (or (decode-char
+ 'ucs
+ (string-to-number arg 16))
+ ??)))
+ parts " "))
+ (concat info parts))))
+ (list "Decimal digit value"
+ (nth 5 fields))
+ (list "Digit value"
+ (nth 6 fields))
+ (list "Numeric value"
+ (nth 7 fields))
+ (list "Mirrored"
+ (if (equal "Y" (nth 8 fields))
+ "yes"))
+ (list "Old name" (nth 9 fields))
+ (list "ISO 10646 comment" (nth 10 fields))
+ (list "Uppercase" (and (nth 11 fields)
+ (string (or (decode-char
+ 'ucs
+ (string-to-number
+ (nth 11 fields) 16))
+ ??))))
+ (list "Lowercase" (and (nth 12 fields)
+ (string (or (decode-char
+ 'ucs
+ (string-to-number
+ (nth 12 fields) 16))
+ ??))))
+ (list "Titlecase" (and (nth 13 fields)
+ (string (or (decode-char
+ 'ucs
+ (string-to-number
+ (nth 13 fields) 16))
+ ??)))))))))))
+
;;;###autoload
(defun describe-char (pos)
"Describe the character after POS (interactively, the character after point).
(composed (if composition (buffer-substring (car composition)
(nth 1 composition))))
(multibyte-p enable-multibyte-characters)
- item-list max-width)
+ item-list max-width unicode)
(if (eq charset 'unknown)
(setq item-list
`(("character"
(single-key-description char)
(char-to-string char))
char char char))))
+
+ (if (or (< (char-after) 256)
+ (memq 'mule-utf-8 (find-coding-systems-region pos (1+ pos)))
+ (get-char-property pos 'untranslated-utf-8))
+ (setq unicode (or (get-char-property pos 'untranslated-utf-8)
+ (encode-char char 'ucs))))
(setq item-list
`(("character"
- ,(format "%s (0%o, %d, 0x%x)" (if (< char 256)
+ ,(format "%s (0%o, %d, 0x%x%s)" (if (< char 256)
(single-key-description char)
(char-to-string char))
- char char char))
+ char char char
+ (if unicode
+ (format ", U+%04X" (encode-char char 'ucs))
+ "")))
("charset"
,(symbol-name charset)
,(format "(%s)" (charset-description charset)))
(format "(encoded by coding system %S)" coding))
(list "not encodable by coding system"
(symbol-name coding)))))
- ,@(if (or (memq 'mule-utf-8
- (find-coding-systems-region pos (1+ pos)))
- (get-char-property pos 'untranslated-utf-8))
- (let ((uc (or (get-char-property pos 'untranslated-utf-8)
- (encode-char char 'ucs))))
- (if uc
- (list (list "Unicode"
- (format "%04X" uc))))))
,(if (display-graphic-p (selected-frame))
(list "font" (or (internal-char-font pos)
"-- none --"))
(encoded (encode-coding-char char coding)))
(if encoded
(encoded-string-description encoded coding)
- "not encodable")))))))
+ "not encodable"))))
+ ,@(let ((unicodedata (and unicode
+ (unicode-data unicode))))
+ (if unicodedata
+ (cons (list "Unicode data" " ") unicodedata))))))
(setq max-width (apply #'max (mapcar #'(lambda (x) (length (car x)))
item-list)))
(when (eq (current-buffer) (get-buffer "*Help*"))
- (error "Can't do self inspection"))
+ (error "Can't describe char in Help buffer"))
(with-output-to-temp-buffer "*Help*"
(with-current-buffer standard-output
(set-buffer-multibyte multibyte-p)
(let ((formatter (format "%%%ds:" max-width)))
(dolist (elt item-list)
- (insert (format formatter (car elt)))
- (dolist (clm (cdr elt))
- (when (>= (+ (current-column)
- (or (string-match "\n" clm)
- (string-width clm)) 1)
- (frame-width))
- (insert "\n")
- (indent-to (1+ max-width)))
- (insert " " clm))
- (insert "\n")))
+ (when (cadr elt)
+ (insert (format formatter (car elt)))
+ (dolist (clm (cdr elt))
+ (when (>= (+ (current-column)
+ (or (string-match "\n" clm)
+ (string-width clm)) 1)
+ (frame-width))
+ (insert "\n")
+ (indent-to (1+ max-width)))
+ (insert " " clm))
+ (insert "\n"))))
(when composition
(insert "\nComposed with the "
(cond
(describe-text-properties pos output))
(describe-text-mode))))))
+(defalias 'describe-char-after 'describe-char)
+(make-obsolete 'describe-char-after 'describe-char "21.5")
+
(provide 'descr-text)
;;; descr-text.el ends here
projects / emacs.git / commitdiff