mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-15 09:47:20 +00:00
705 lines
24 KiB
EmacsLisp
705 lines
24 KiB
EmacsLisp
;;; descr-text.el --- describe text mode
|
||
|
||
;; Copyright (C) 1994, 1995, 1996, 2001, 2002, 2003, 2004,
|
||
;; 2005, 2006 Free Software Foundation, Inc.
|
||
|
||
;; Author: Boris Goldowsky <boris@gnu.org>
|
||
;; Maintainer: FSF
|
||
;; Keywords: faces, i18n, Unicode, multilingual
|
||
|
||
;; 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., 51 Franklin Street, Fifth Floor,
|
||
;; Boston, MA 02110-1301, USA.
|
||
|
||
;;; Commentary:
|
||
|
||
;;; Describe-Text Mode.
|
||
|
||
;;; Code:
|
||
|
||
(eval-when-compile (require 'quail))
|
||
(require 'help-fns)
|
||
|
||
;;; Describe-Text Utilities.
|
||
|
||
(defun describe-text-widget (widget)
|
||
"Insert text to describe WIDGET in the current buffer."
|
||
(insert-text-button
|
||
(symbol-name (if (symbolp widget) widget (car widget)))
|
||
'action `(lambda (&rest ignore)
|
||
(widget-browse ',widget))
|
||
'help-echo "mouse-2, RET: browse this widget")
|
||
(insert " ")
|
||
(insert-text-button
|
||
"(widget)Top" 'type 'help-info 'help-args '("(widget)Top")))
|
||
|
||
(defun describe-text-sexp (sexp)
|
||
"Insert a short description of SEXP in the current buffer."
|
||
(let ((pp (condition-case signal
|
||
(pp-to-string sexp)
|
||
(error (prin1-to-string signal)))))
|
||
(when (string-match "\n\\'" pp)
|
||
(setq pp (substring pp 0 (1- (length pp)))))
|
||
(if (cond ((string-match "\n" pp)
|
||
nil)
|
||
((> (length pp) (- (window-width) (current-column)))
|
||
nil)
|
||
(t t))
|
||
(insert pp)
|
||
(insert-text-button
|
||
"[Show]" 'action `(lambda (&rest ignore)
|
||
(with-output-to-temp-buffer
|
||
"*Pp Eval Output*"
|
||
(princ ',pp)))
|
||
'help-echo "mouse-2, RET: pretty print value in another buffer"))))
|
||
|
||
(defun describe-property-list (properties)
|
||
"Insert a description of PROPERTIES in the current buffer.
|
||
PROPERTIES should be a list of overlay or text properties.
|
||
The `category', `face' and `font-lock-face' properties are made
|
||
into help buttons that call `describe-text-category' or
|
||
`describe-face' when pushed."
|
||
;; Sort the properties by the size of their value.
|
||
(dolist (elt (sort (let (ret)
|
||
(while properties
|
||
(push (list (pop properties) (pop properties)) ret))
|
||
ret)
|
||
(lambda (a b) (string< (prin1-to-string (nth 0 a) t)
|
||
(prin1-to-string (nth 0 b) t)))))
|
||
(let ((key (nth 0 elt))
|
||
(value (nth 1 elt)))
|
||
(insert (propertize (format " %-20s " key)
|
||
'face 'help-argument-name))
|
||
(cond ((eq key 'category)
|
||
(insert-text-button
|
||
(symbol-name value)
|
||
'action `(lambda (&rest ignore)
|
||
(describe-text-category ',value))
|
||
'help-echo "mouse-2, RET: describe this category"))
|
||
((memq key '(face font-lock-face mouse-face))
|
||
(insert-text-button
|
||
(format "%S" value)
|
||
'type 'help-face 'help-args (list value)))
|
||
((widgetp value)
|
||
(describe-text-widget value))
|
||
(t
|
||
(describe-text-sexp value))))
|
||
(insert "\n")))
|
||
|
||
;;; Describe-Text Commands.
|
||
|
||
(defun describe-text-category (category)
|
||
"Describe a text property category."
|
||
(interactive "SCategory: ")
|
||
(help-setup-xref (list #'describe-text-category category) (interactive-p))
|
||
(save-excursion
|
||
(with-output-to-temp-buffer "*Help*"
|
||
(set-buffer standard-output)
|
||
(insert "Category " (format "%S" category) ":\n\n")
|
||
(describe-property-list (symbol-plist category))
|
||
(goto-char (point-min)))))
|
||
|
||
;;;###autoload
|
||
(defun describe-text-properties (pos &optional output-buffer)
|
||
"Describe widgets, buttons, overlays and text properties at POS.
|
||
Interactively, describe them for the character after point.
|
||
If optional second argument OUTPUT-BUFFER is non-nil,
|
||
insert the output into that buffer, and don't initialize or clear it
|
||
otherwise."
|
||
(interactive "d")
|
||
(if (>= pos (point-max))
|
||
(error "No character follows specified position"))
|
||
(if output-buffer
|
||
(describe-text-properties-1 pos output-buffer)
|
||
(if (not (or (text-properties-at pos) (overlays-at pos)))
|
||
(message "This is plain text.")
|
||
(let ((buffer (current-buffer))
|
||
(target-buffer "*Help*"))
|
||
(when (eq buffer (get-buffer target-buffer))
|
||
(setq target-buffer "*Help*<2>"))
|
||
(save-excursion
|
||
(with-output-to-temp-buffer target-buffer
|
||
(set-buffer standard-output)
|
||
(setq output-buffer (current-buffer))
|
||
(insert "Text content at position " (format "%d" pos) ":\n\n")
|
||
(with-current-buffer buffer
|
||
(describe-text-properties-1 pos output-buffer))
|
||
(goto-char (point-min))))))))
|
||
|
||
(defun describe-text-properties-1 (pos output-buffer)
|
||
(let* ((properties (text-properties-at pos))
|
||
(overlays (overlays-at pos))
|
||
(wid-field (get-char-property pos 'field))
|
||
(wid-button (get-char-property pos 'button))
|
||
(wid-doc (get-char-property pos 'widget-doc))
|
||
;; If button.el is not loaded, we have no buttons in the text.
|
||
(button (and (fboundp 'button-at) (button-at pos)))
|
||
(button-type (and button (button-type button)))
|
||
(button-label (and button (button-label button)))
|
||
(widget (or wid-field wid-button wid-doc)))
|
||
(with-current-buffer output-buffer
|
||
;; Widgets
|
||
(when (widgetp widget)
|
||
(newline)
|
||
(insert (cond (wid-field "This is an editable text area")
|
||
(wid-button "This is an active area")
|
||
(wid-doc "This is documentation text")))
|
||
(insert " of a ")
|
||
(describe-text-widget widget)
|
||
(insert ".\n\n"))
|
||
;; Buttons
|
||
(when (and button (not (widgetp wid-button)))
|
||
(newline)
|
||
(insert "Here is a `" (format "%S" button-type)
|
||
"' button labeled `" button-label "'.\n\n"))
|
||
;; Overlays
|
||
(when overlays
|
||
(newline)
|
||
(if (eq (length overlays) 1)
|
||
(insert "There is an overlay here:\n")
|
||
(insert "There are " (format "%d" (length overlays))
|
||
" overlays here:\n"))
|
||
(dolist (overlay overlays)
|
||
(insert " From " (format "%d" (overlay-start overlay))
|
||
" to " (format "%d" (overlay-end overlay)) "\n")
|
||
(describe-property-list (overlay-properties overlay)))
|
||
(insert "\n"))
|
||
;; Text properties
|
||
(when properties
|
||
(newline)
|
||
(insert "There are text properties here:\n")
|
||
(describe-property-list properties)))))
|
||
|
||
(defcustom describe-char-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' 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 the URL
|
||
`http://www.unicode.org/Public/UNIDATA/UnicodeData.txt'."
|
||
:group 'mule
|
||
:version "22.1"
|
||
: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 describe-char-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 `describe-char-unicodedata-file'."
|
||
(when describe-char-unicodedata-file
|
||
(unless (file-exists-p describe-char-unicodedata-file)
|
||
(error "`unicodedata-file' %s not found" describe-char-unicodedata-file))
|
||
(with-current-buffer
|
||
;; 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.
|
||
(let ((auto-mode-alist))
|
||
(find-file-noselect describe-char-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" describe-char-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))
|
||
??)))))))))))
|
||
|
||
;; Return information about how CHAR is displayed at the buffer
|
||
;; position POS. If the selected frame is on a graphic display,
|
||
;; return a cons (FONTNAME . GLYPH-CODE). Otherwise, return a string
|
||
;; describing the terminal codes for the character.
|
||
(defun describe-char-display (pos char)
|
||
(if (display-graphic-p (selected-frame))
|
||
(internal-char-font pos char)
|
||
(let* ((coding (terminal-coding-system))
|
||
(encoded (encode-coding-char char coding)))
|
||
(if encoded
|
||
(encoded-string-description encoded coding)))))
|
||
|
||
|
||
;;;###autoload
|
||
(defun describe-char (pos)
|
||
"Describe the character after POS (interactively, the character after point).
|
||
The information includes character code, charset and code points in it,
|
||
syntax, category, how the character is encoded in a file,
|
||
character composition information (if relevant),
|
||
as well as widgets, buttons, overlays, and text properties."
|
||
(interactive "d")
|
||
(if (>= pos (point-max))
|
||
(error "No character follows specified position"))
|
||
(let* ((char (char-after pos))
|
||
(charset (char-charset char))
|
||
(composition (find-composition pos nil nil t))
|
||
(component-chars nil)
|
||
(display-table (or (window-display-table)
|
||
buffer-display-table
|
||
standard-display-table))
|
||
(disp-vector (and display-table (aref display-table char)))
|
||
(multibyte-p enable-multibyte-characters)
|
||
(overlays (mapcar #'(lambda (o) (overlay-properties o))
|
||
(overlays-at pos)))
|
||
(char-description (if (not multibyte-p)
|
||
(single-key-description char)
|
||
(if (< char 128)
|
||
(single-key-description char)
|
||
(string-to-multibyte
|
||
(char-to-string char)))))
|
||
(text-props-desc
|
||
(let ((tmp-buf (generate-new-buffer " *text-props*")))
|
||
(unwind-protect
|
||
(progn
|
||
(describe-text-properties pos tmp-buf)
|
||
(with-current-buffer tmp-buf (buffer-string)))
|
||
(kill-buffer tmp-buf))))
|
||
item-list max-width unicode)
|
||
|
||
(if (or (< char 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 (%d, #o%o, #x%x%s)"
|
||
(apply 'propertize char-description
|
||
(text-properties-at pos))
|
||
char char char
|
||
(if unicode
|
||
(format ", U+%04X" unicode)
|
||
"")))
|
||
("charset"
|
||
,`(insert-text-button
|
||
,(symbol-name charset)
|
||
'type 'help-character-set 'help-args '(,charset))
|
||
,(format "(%s)" (charset-description charset)))
|
||
("code point"
|
||
,(let ((split (split-char char)))
|
||
`(insert-text-button
|
||
,(if (= (charset-dimension charset) 1)
|
||
(format "#x%02X" (nth 1 split))
|
||
(format "#x%02X #x%02X" (nth 1 split)
|
||
(nth 2 split)))
|
||
'action (lambda (&rest ignore)
|
||
(list-charset-chars ',charset)
|
||
(with-selected-window
|
||
(get-buffer-window "*Character List*" 0)
|
||
(goto-char (point-min))
|
||
(forward-line 2) ;Skip the header.
|
||
(let ((case-fold-search nil))
|
||
(search-forward ,(char-to-string char)
|
||
nil t))))
|
||
'help-echo
|
||
"mouse-2, RET: show this character in its character set")))
|
||
("syntax"
|
||
,(let ((syntax (syntax-after pos)))
|
||
(with-temp-buffer
|
||
(internal-describe-syntax-value syntax)
|
||
(buffer-string))))
|
||
("category"
|
||
,@(let ((category-set (char-category-set char)))
|
||
(if (not category-set)
|
||
'("-- none --")
|
||
(mapcar #'(lambda (x) (format "%c:%s"
|
||
x (category-docstring x)))
|
||
(category-set-mnemonics category-set)))))
|
||
,@(let ((props (aref char-code-property-table char))
|
||
ps)
|
||
(when props
|
||
(while props
|
||
(push (format "%s:" (pop props)) ps)
|
||
(push (format "%s;" (pop props)) ps))
|
||
(list (cons "Properties" (nreverse ps)))))
|
||
("to input"
|
||
,@(let ((key-list (and (eq input-method-function
|
||
'quail-input-method)
|
||
(quail-find-key char))))
|
||
(if (consp key-list)
|
||
(list "type"
|
||
(mapconcat #'(lambda (x) (concat "\"" x "\""))
|
||
key-list " or ")
|
||
"with"
|
||
`(insert-text-button
|
||
,current-input-method
|
||
'type 'help-input-method
|
||
'help-args '(,current-input-method))))))
|
||
("buffer code"
|
||
,(encoded-string-description
|
||
(string-as-unibyte (char-to-string char)) nil))
|
||
("file code"
|
||
,@(let* ((coding buffer-file-coding-system)
|
||
(encoded (encode-coding-char char coding)))
|
||
(if encoded
|
||
(list (encoded-string-description encoded coding)
|
||
(format "(encoded by coding system %S)" coding))
|
||
(list "not encodable by coding system"
|
||
(symbol-name coding)))))
|
||
("display"
|
||
,(cond
|
||
(disp-vector
|
||
(setq disp-vector (copy-sequence disp-vector))
|
||
(dotimes (i (length disp-vector))
|
||
(setq char (aref disp-vector i))
|
||
(aset disp-vector i
|
||
(cons char (describe-char-display
|
||
pos (logand char #x7ffff)))))
|
||
(format "by display table entry [%s] (see below)"
|
||
(mapconcat
|
||
#'(lambda (x)
|
||
(format "?%c" (logand (car x) #x7ffff)))
|
||
disp-vector " ")))
|
||
(composition
|
||
(let ((from (car composition))
|
||
(to (nth 1 composition))
|
||
(next (1+ pos))
|
||
(components (nth 2 composition))
|
||
ch)
|
||
(setcar composition
|
||
(and (< from pos) (buffer-substring from pos)))
|
||
(setcar (cdr composition)
|
||
(and (< next to) (buffer-substring next to)))
|
||
(dotimes (i (length components))
|
||
(if (integerp (setq ch (aref components i)))
|
||
(push (cons ch (describe-char-display pos ch))
|
||
component-chars)))
|
||
(setq component-chars (nreverse component-chars))
|
||
(format "composed to form \"%s\" (see below)"
|
||
(buffer-substring from to))))
|
||
(t
|
||
(let ((display (describe-char-display pos char)))
|
||
(if (display-graphic-p (selected-frame))
|
||
(if display
|
||
(concat
|
||
"by this font (glyph code)\n"
|
||
(format " %s (#x%02X)"
|
||
(car display) (cdr display)))
|
||
"no font available")
|
||
(if display
|
||
(format "terminal code %s" display)
|
||
"not encodable for terminal"))))))
|
||
,@(let ((face
|
||
(if (not (or disp-vector composition))
|
||
(cond
|
||
((and show-trailing-whitespace
|
||
(save-excursion (goto-char pos)
|
||
(looking-at "[ \t]+$")))
|
||
'trailing-whitespace)
|
||
((and nobreak-char-display unicode (eq unicode '#xa0))
|
||
'nobreak-space)
|
||
((and nobreak-char-display unicode (eq unicode '#xad))
|
||
'escape-glyph)
|
||
((and (< char 32) (not (memq char '(9 10))))
|
||
'escape-glyph)))))
|
||
(if face (list (list "hardcoded face"
|
||
`(insert-text-button
|
||
,(symbol-name face)
|
||
'type 'help-face 'help-args '(,face))))))
|
||
,@(let ((unicodedata (and unicode
|
||
(describe-char-unicode-data unicode))))
|
||
(if unicodedata
|
||
(cons (list "Unicode data" " ") unicodedata)))))
|
||
(setq max-width (apply #'max (mapcar #'(lambda (x)
|
||
(if (cadr x) (length (car x)) 0))
|
||
item-list)))
|
||
(help-setup-xref nil (interactive-p))
|
||
(with-output-to-temp-buffer (help-buffer)
|
||
(with-current-buffer standard-output
|
||
(set-buffer-multibyte multibyte-p)
|
||
(let ((formatter (format "%%%ds:" max-width)))
|
||
(dolist (elt item-list)
|
||
(when (cadr elt)
|
||
(insert (format formatter (car elt)))
|
||
(dolist (clm (cdr elt))
|
||
(if (eq (car-safe clm) 'insert-text-button)
|
||
(progn (insert " ") (eval clm))
|
||
(when (>= (+ (current-column)
|
||
(or (string-match "\n" clm)
|
||
(string-width clm))
|
||
1)
|
||
(window-width))
|
||
(insert "\n")
|
||
(indent-to (1+ max-width)))
|
||
(insert " " clm)))
|
||
(insert "\n"))))
|
||
|
||
(when overlays
|
||
(save-excursion
|
||
(goto-char (point-min))
|
||
(re-search-forward "character:[ \t\n]+")
|
||
(let* ((end (+ (point) (length char-description))))
|
||
(mapc #'(lambda (props)
|
||
(let ((o (make-overlay (point) end)))
|
||
(while props
|
||
(overlay-put o (car props) (nth 1 props))
|
||
(setq props (cddr props)))))
|
||
overlays))))
|
||
|
||
(when disp-vector
|
||
(insert
|
||
"\nThe display table entry is displayed by ")
|
||
(if (display-graphic-p (selected-frame))
|
||
(progn
|
||
(insert "these fonts (glyph codes):\n")
|
||
(dotimes (i (length disp-vector))
|
||
(insert (logand (car (aref disp-vector i)) #x7ffff) ?:
|
||
(propertize " " 'display '(space :align-to 5))
|
||
(if (cdr (aref disp-vector i))
|
||
(format "%s (#x%02X)" (cadr (aref disp-vector i))
|
||
(cddr (aref disp-vector i)))
|
||
"-- no font --")
|
||
"\n")
|
||
(when (> (car (aref disp-vector i)) #x7ffff)
|
||
(let* ((face-id (lsh (car (aref disp-vector i)) -19))
|
||
(face (car (delq nil (mapcar
|
||
(lambda (face)
|
||
(and (eq (face-id face)
|
||
face-id) face))
|
||
(face-list))))))
|
||
(when face
|
||
(insert (propertize " " 'display '(space :align-to 5))
|
||
"face: ")
|
||
(insert (concat "`" (symbol-name face) "'"))
|
||
(insert "\n"))))))
|
||
(insert "these terminal codes:\n")
|
||
(dotimes (i (length disp-vector))
|
||
(insert (car (aref disp-vector i))
|
||
(propertize " " 'display '(space :align-to 5))
|
||
(or (cdr (aref disp-vector i)) "-- not encodable --")
|
||
"\n"))))
|
||
|
||
(when composition
|
||
(insert "\nComposed")
|
||
(if (car composition)
|
||
(if (cadr composition)
|
||
(insert " with the surrounding characters \""
|
||
(car composition) "\" and \""
|
||
(cadr composition) "\"")
|
||
(insert " with the preceding character(s) \""
|
||
(car composition) "\""))
|
||
(if (cadr composition)
|
||
(insert " with the following character(s) \""
|
||
(cadr composition) "\"")))
|
||
(insert " by the rule:\n\t("
|
||
(mapconcat (lambda (x)
|
||
(format (if (consp x) "%S" "?%c") x))
|
||
(nth 2 composition)
|
||
" ")
|
||
")")
|
||
(insert "\nThe component character(s) are displayed by ")
|
||
(if (display-graphic-p (selected-frame))
|
||
(progn
|
||
(insert "these fonts (glyph codes):")
|
||
(dolist (elt component-chars)
|
||
(insert "\n " (car elt) ?:
|
||
(propertize " " 'display '(space :align-to 5))
|
||
(if (cdr elt)
|
||
(format "%s (#x%02X)" (cadr elt) (cddr elt))
|
||
"-- no font --"))))
|
||
(insert "these terminal codes:")
|
||
(dolist (elt component-chars)
|
||
(insert "\n " (car elt) ":"
|
||
(propertize " " 'display '(space :align-to 5))
|
||
(or (cdr elt) "-- not encodable --"))))
|
||
(insert "\nSee the variable `reference-point-alist' for "
|
||
"the meaning of the rule.\n"))
|
||
|
||
(if text-props-desc (insert text-props-desc))
|
||
(setq help-xref-stack-item (list 'help-insert-string (buffer-string)))
|
||
(toggle-read-only 1)
|
||
(print-help-return-message)))))
|
||
|
||
(defalias 'describe-char-after 'describe-char)
|
||
(make-obsolete 'describe-char-after 'describe-char "22.1")
|
||
|
||
(provide 'descr-text)
|
||
|
||
;; arch-tag: fc55a498-f3e9-4312-b5bd-98cc02480af1
|
||
;;; descr-text.el ends here
|