;;; help-fns.el --- Complex help functions
-;; Copyright (C) 1985, 1986, 1993, 1994, 1998, 1999, 2000, 2001,
-;; 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1993, 1994, 1998, 1999, 2000, 2001, 2002,
+;; 2003, 2004, 2005, 2006, 2007, 2008, 2009
+;; Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: help, internal
fn (intern val)))))
(if (null function)
(message "You didn't specify a function")
- (help-setup-xref (list #'describe-function function) (interactive-p))
+ (help-setup-xref (list #'describe-function function)
+ (called-interactively-p 'interactive))
(save-excursion
(with-help-window (help-buffer)
(prin1 function)
;; Handle symbols aliased to other symbols.
(if (and (symbolp def) (fboundp def)) (setq def (indirect-function def)))
;; If definition is a macro, find the function inside it.
- (if (eq (car-safe def) 'macro) (setq def (cdr def)))
- (cond
- ((byte-code-function-p def) (aref def 0))
- ((eq (car-safe def) 'lambda) (nth 1 def))
- ((and (eq (car-safe def) 'autoload) (not (eq (nth 4 def) 'keymap)))
- "[Arg list not available until function definition is loaded.]")
- (t t)))
+ (let ((advertised (gethash def advertised-signature-table t)))
+ (if (listp advertised) advertised
+ (if (eq (car-safe def) 'macro) (setq def (cdr def)))
+ (cond
+ ((byte-code-function-p def) (aref def 0))
+ ((eq (car-safe def) 'lambda) (nth 1 def))
+ ((and (eq (car-safe def) 'autoload) (not (eq (nth 4 def) 'keymap)))
+ "[Arg list not available until function definition is loaded.]")
+ (t t)))))
(defun help-make-usage (function arglist)
(cons (if (symbolp function) function 'anonymous)
(concat "src/" file)
file)))))
-(defface help-argument-name '((((supports :slant italic)) :inherit italic))
- "Face to highlight argument names in *Help* buffers."
- :group 'help)
+(defcustom help-downcase-arguments nil
+ "If non-nil, argument names in *Help* buffers are downcased."
+ :type 'boolean
+ :group 'help
+ :version "23.2")
-(defun help-default-arg-highlight (arg)
- "Default function to highlight arguments in *Help* buffers.
-It returns ARG in face `help-argument-name'; ARG is also
-downcased if it displays differently than the default
-face (according to `face-differs-from-default-p')."
- (propertize (if (face-differs-from-default-p 'help-argument-name)
- (downcase arg)
- arg)
- 'face 'help-argument-name))
+(defun help-highlight-arg (arg)
+ "Highlight ARG as an argument name for a *Help* buffer.
+Return ARG in face `help-argument-name'; ARG is also downcased
+if the variable `help-downcase-arguments' is non-nil."
+ (propertize (if help-downcase-arguments (downcase arg) arg)
+ 'face 'help-argument-name))
(defun help-do-arg-highlight (doc args)
(with-syntax-table (make-syntax-table emacs-lisp-mode-syntax-table)
"\\(?:-[a-z0-9-]+\\)?" ; for ARG-xxx, ARG-n
"\\(?:-[{([<`\"].*?\\)?"; for ARG-{x}, (x), <x>, [x], `x'
"\\>") ; end of word
- (help-default-arg-highlight arg)
+ (help-highlight-arg arg)
doc t t 1)))))
(defun help-highlight-arguments (usage doc &rest args)
;; Return value is like the one from help-split-fundoc, but highlighted
(cons usage doc))
+;; The following function was compiled from the former functions
+;; `describe-simplify-lib-file-name' and `find-source-lisp-file' with
+;; some excerpts from `describe-function-1' and `describe-variable'.
+;; The only additional twists provided are (1) locate the defining file
+;; for autoloaded functions, and (2) give preference to files in the
+;; "install directory" (directories found via `load-path') rather than
+;; to files in the "compile directory" (directories found by searching
+;; the loaddefs.el file). We autoload it because it's also used by
+;; `describe-face' (instead of `describe-simplify-lib-file-name').
+
;;;###autoload
-(defun describe-simplify-lib-file-name (file)
- "Simplify a library name FILE to a relative name, and make it a source file."
- (if file
- ;; Try converting the absolute file name to a library name.
- (let ((libname (file-name-nondirectory file)))
- ;; Now convert that back to a file name and see if we get
- ;; the original one. If so, they are equivalent.
- (if (equal file (locate-file libname load-path '("")))
- (if (string-match "[.]elc\\'" libname)
- (substring libname 0 -1)
- libname)
- file))))
-
-(defun find-source-lisp-file (file-name)
- (let* ((elc-file (locate-file (concat file-name
- (if (string-match "\\.el" file-name)
- "c"
- ".elc"))
- load-path))
- (str (if (and elc-file (file-readable-p elc-file))
- (with-temp-buffer
- (insert-file-contents-literally elc-file nil 0 256)
- (buffer-string))))
- (src-file (and str
- (string-match ";;; from file \\(.*\\.el\\)" str)
- (match-string 1 str))))
- (if (and src-file (file-readable-p src-file))
- src-file
- file-name)))
+(defun find-lisp-object-file-name (object type)
+ "Guess the file that defined the Lisp object OBJECT, of type TYPE.
+OBJECT should be a symbol associated with a function, variable, or face;
+ alternatively, it can be a function definition.
+If TYPE is `variable', search for a variable definition.
+If TYPE is `face', search for a face definition.
+If TYPE is the value returned by `symbol-function' for a function symbol,
+ search for a function definition.
+
+The return value is the absolute name of a readable file where OBJECT is
+defined. If several such files exist, preference is given to a file
+found via `load-path'. The return value can also be `C-source', which
+means that OBJECT is a function or variable defined in C. If no
+suitable file is found, return nil."
+ (let* ((autoloaded (eq (car-safe type) 'autoload))
+ (file-name (or (and autoloaded (nth 1 type))
+ (symbol-file
+ object (if (memq type (list 'defvar 'defface))
+ type
+ 'defun)))))
+ (cond
+ (autoloaded
+ ;; An autoloaded function: Locate the file since `symbol-function'
+ ;; has only returned a bare string here.
+ (setq file-name
+ (locate-file file-name load-path '(".el" ".elc") 'readable)))
+ ((and (stringp file-name)
+ (string-match "[.]*loaddefs.el\\'" file-name))
+ ;; An autoloaded variable or face. Visit loaddefs.el in a buffer
+ ;; and try to extract the defining file. The following form is
+ ;; from `describe-function-1' and `describe-variable'.
+ (let ((location
+ (condition-case nil
+ (find-function-search-for-symbol object nil file-name)
+ (error nil))))
+ (when (cdr location)
+ (with-current-buffer (car location)
+ (goto-char (cdr location))
+ (when (re-search-backward
+ "^;;; Generated autoloads from \\(.*\\)" nil t)
+ (setq file-name
+ (locate-file
+ (file-name-sans-extension
+ (match-string-no-properties 1))
+ load-path '(".el" ".elc") 'readable))))))))
+
+ (cond
+ ((and (not file-name) (subrp type))
+ ;; A built-in function. The form is from `describe-function-1'.
+ (if (get-buffer " *DOC*")
+ (help-C-file-name type 'subr)
+ 'C-source))
+ ((and (not file-name) (symbolp object)
+ (integerp (get object 'variable-documentation)))
+ ;; A variable defined in C. The form is from `describe-variable'.
+ (if (get-buffer " *DOC*")
+ (help-C-file-name object 'var)
+ 'C-source))
+ ((not (stringp file-name))
+ ;; If we don't have a file-name string by now, we lost.
+ nil)
+ ((let ((lib-name
+ (if (string-match "[.]elc\\'" file-name)
+ (substring-no-properties file-name 0 -1)
+ file-name)))
+ ;; When the Elisp source file can be found in the install
+ ;; directory return the name of that file - `file-name' should
+ ;; have become an absolute file name ny now.
+ (or (and (file-readable-p lib-name) lib-name)
+ ;; The library might be compressed.
+ (and (file-readable-p (concat lib-name ".gz")) lib-name))))
+ ((let* ((lib-name (file-name-nondirectory file-name))
+ ;; The next form is from `describe-simplify-lib-file-name'.
+ (file-name
+ ;; Try converting the absolute file name to a library
+ ;; name, convert that back to a file name and see if we
+ ;; get the original one. If so, they are equivalent.
+ (if (equal file-name (locate-file lib-name load-path '("")))
+ (if (string-match "[.]elc\\'" lib-name)
+ (substring-no-properties lib-name 0 -1)
+ lib-name)
+ file-name))
+ ;; The next three forms are from `find-source-lisp-file'.
+ (elc-file (locate-file
+ (concat file-name
+ (if (string-match "\\.el\\'" file-name)
+ "c"
+ ".elc"))
+ load-path nil 'readable))
+ (str (when elc-file
+ (with-temp-buffer
+ (insert-file-contents-literally elc-file nil 0 256)
+ (buffer-string))))
+ (src-file (and str
+ (string-match ";;; from file \\(.*\\.el\\)" str)
+ (match-string 1 str))))
+ (and src-file (file-readable-p src-file) src-file))))))
(declare-function ad-get-advice-info "advice" (function))
;; real definition, if that symbol is already set up.
(real-function
(or (and advised
- (cdr (assq 'origname advised))
- (fboundp (cdr (assq 'origname advised)))
- (cdr (assq 'origname advised)))
+ (let ((origname (cdr (assq 'origname advised))))
+ (and (fboundp origname) origname)))
function))
;; Get the real definition.
(def (if (symbolp real-function)
function))
file-name string
(beg (if (commandp def) "an interactive " "a "))
- (pt1 (with-current-buffer (help-buffer) (point))))
+ (pt1 (with-current-buffer (help-buffer) (point)))
+ errtype)
(setq string
(cond ((or (stringp def)
(vectorp def))
((byte-code-function-p def)
(concat beg "compiled Lisp function"))
((symbolp def)
- (while (symbolp (symbol-function def))
+ (while (and (fboundp def)
+ (symbolp (symbol-function def)))
(setq def (symbol-function def)))
+ ;; Handle (defalias 'foo 'bar), where bar is undefined.
+ (or (fboundp def) (setq errtype 'alias))
(format "an alias for `%s'" def))
((eq (car-safe def) 'lambda)
(concat beg "Lisp function"))
((eq (car-safe def) 'macro)
"a Lisp macro")
((eq (car-safe def) 'autoload)
- (setq file-name (nth 1 def))
(format "%s autoloaded %s"
(if (commandp def) "an interactive" "an")
(if (eq (nth 4 def) 'keymap) "keymap"
- (if (nth 4 def) "Lisp macro" "Lisp function"))
- ))
+ (if (nth 4 def) "Lisp macro" "Lisp function"))))
((keymapp def)
(let ((is-full nil)
(elts (cdr-safe def)))
"a sparse keymap")))
(t "")))
(princ string)
- (with-current-buffer standard-output
- (save-excursion
- (save-match-data
- (if (re-search-backward "alias for `\\([^`']+\\)'" nil t)
- (help-xref-button 1 'help-function def)))))
- (or file-name
- (setq file-name (symbol-file function 'defun)))
- (setq file-name (describe-simplify-lib-file-name file-name))
- (when (equal file-name "loaddefs.el")
- ;; Find the real def site of the preloaded function.
- ;; This is necessary only for defaliases.
- (let ((location
- (condition-case nil
- (find-function-search-for-symbol function nil "loaddefs.el")
- (error nil))))
- (when location
- (with-current-buffer (car location)
- (goto-char (cdr location))
- (when (re-search-backward
- "^;;; Generated autoloads from \\(.*\\)" nil t)
- (setq file-name (match-string 1)))))))
- (when (and (null file-name) (subrp def))
- ;; Find the C source file name.
- (setq file-name (if (get-buffer " *DOC*")
- (help-C-file-name def 'subr)
- 'C-source)))
- (when file-name
- (princ " in `")
- ;; We used to add .el to the file name,
- ;; but that's completely wrong when the user used load-file.
- (princ (if (eq file-name 'C-source) "C source code" file-name))
- (princ "'")
- ;; See if lisp files are present where they where installed from.
- (if (not (eq file-name 'C-source))
- (setq file-name (find-source-lisp-file file-name)))
-
- ;; Make a hyperlink to the library.
- (with-current-buffer standard-output
- (save-excursion
- (re-search-backward "`\\([^`']+\\)'" nil t)
- (help-xref-button 1 'help-function-def real-function file-name))))
- (princ ".")
- (with-current-buffer (help-buffer)
- (fill-region-as-paragraph (save-excursion (goto-char pt1) (forward-line 0) (point))
- (point)))
- (terpri)(terpri)
- (when (commandp function)
- (let ((pt2 (with-current-buffer (help-buffer) (point))))
- (if (and (eq function 'self-insert-command)
- (eq (key-binding "a") 'self-insert-command)
- (eq (key-binding "b") 'self-insert-command)
- (eq (key-binding "c") 'self-insert-command))
- (princ "It is bound to many ordinary text characters.\n")
- (let* ((remapped (command-remapping function))
- (keys (where-is-internal
- (or remapped function) overriding-local-map nil nil))
- non-modified-keys)
- ;; Which non-control non-meta keys run this command?
- (dolist (key keys)
- (if (member (event-modifiers (aref key 0)) '(nil (shift)))
- (push key non-modified-keys)))
- (when remapped
- (princ "It is remapped to `")
- (princ (symbol-name remapped))
- (princ "'"))
-
- (when keys
- (princ (if remapped ", which is bound to " "It is bound to "))
- ;; If lots of ordinary text characters run this command,
- ;; don't mention them one by one.
- (if (< (length non-modified-keys) 10)
- (princ (mapconcat 'key-description keys ", "))
- (dolist (key non-modified-keys)
- (setq keys (delq key keys)))
- (if keys
- (progn
- (princ (mapconcat 'key-description keys ", "))
- (princ ", and many ordinary text characters"))
- (princ "many ordinary text characters"))))
- (when (or remapped keys non-modified-keys)
- (princ ".")
- (terpri))))
- (with-current-buffer (help-buffer) (fill-region-as-paragraph pt2 (point)))
- (terpri)))
- (let* ((arglist (help-function-arglist def))
- (doc (documentation function))
- (usage (help-split-fundoc doc function)))
+ (if (eq errtype 'alias)
+ (princ ",\nwhich is not defined. Please make a bug report.")
(with-current-buffer standard-output
- ;; If definition is a keymap, skip arglist note.
- (unless (keymapp function)
- (let* ((use (cond
- (usage (setq doc (cdr usage)) (car usage))
- ((listp arglist)
- (format "%S" (help-make-usage function arglist)))
- ((stringp arglist) arglist)
- ;; Maybe the arglist is in the docstring of a symbol
- ;; this one is aliased to.
- ((let ((fun real-function))
- (while (and (symbolp fun)
- (setq fun (symbol-function fun))
- (not (setq usage (help-split-fundoc
- (documentation fun)
- function)))))
- usage)
- (car usage))
- ((or (stringp def)
- (vectorp def))
- (format "\nMacro: %s" (format-kbd-macro def)))
- (t "[Missing arglist. Please make a bug report.]")))
- (high (help-highlight-arguments use doc)))
- (let ((fill-begin (point)))
- (insert (car high) "\n")
- (fill-region fill-begin (point)))
- (setq doc (cdr high))))
- (let* ((obsolete (and
- ;; function might be a lambda construct.
- (symbolp function)
- (get function 'byte-obsolete-info)))
- (use (car obsolete)))
- (when obsolete
- (princ "\nThis function is obsolete")
- (when (nth 2 obsolete)
- (insert (format " since %s" (nth 2 obsolete))))
- (insert (cond ((stringp use) (concat ";\n" use))
- (use (format ";\nuse `%s' instead." use))
- (t "."))
- "\n"))
- (insert "\n"
- (or doc "Not documented.")))))))
+ (save-excursion
+ (save-match-data
+ (when (re-search-backward "alias for `\\([^`']+\\)'" nil t)
+ (help-xref-button 1 'help-function def)))))
+
+ (setq file-name (find-lisp-object-file-name function def))
+ (when file-name
+ (princ " in `")
+ ;; We used to add .el to the file name,
+ ;; but that's completely wrong when the user used load-file.
+ (princ (if (eq file-name 'C-source)
+ "C source code"
+ (file-name-nondirectory file-name)))
+ (princ "'")
+ ;; Make a hyperlink to the library.
+ (with-current-buffer standard-output
+ (save-excursion
+ (re-search-backward "`\\([^`']+\\)'" nil t)
+ (help-xref-button 1 'help-function-def function file-name))))
+ (princ ".")
+ (with-current-buffer (help-buffer)
+ (fill-region-as-paragraph (save-excursion (goto-char pt1) (forward-line 0) (point))
+ (point)))
+ (terpri)(terpri)
+ (when (commandp function)
+ (let ((pt2 (with-current-buffer (help-buffer) (point)))
+ (remapped (command-remapping function)))
+ (unless (memq remapped '(ignore undefined))
+ (let ((keys (where-is-internal
+ (or remapped function) overriding-local-map nil nil))
+ non-modified-keys)
+ (if (and (eq function 'self-insert-command)
+ (vectorp (car-safe keys))
+ (consp (aref (car keys) 0)))
+ (princ "It is bound to many ordinary text characters.\n")
+ ;; Which non-control non-meta keys run this command?
+ (dolist (key keys)
+ (if (member (event-modifiers (aref key 0)) '(nil (shift)))
+ (push key non-modified-keys)))
+ (when remapped
+ (princ "It is remapped to `")
+ (princ (symbol-name remapped))
+ (princ "'"))
+
+ (when keys
+ (princ (if remapped ", which is bound to " "It is bound to "))
+ ;; If lots of ordinary text characters run this command,
+ ;; don't mention them one by one.
+ (if (< (length non-modified-keys) 10)
+ (princ (mapconcat 'key-description keys ", "))
+ (dolist (key non-modified-keys)
+ (setq keys (delq key keys)))
+ (if keys
+ (progn
+ (princ (mapconcat 'key-description keys ", "))
+ (princ ", and many ordinary text characters"))
+ (princ "many ordinary text characters"))))
+ (when (or remapped keys non-modified-keys)
+ (princ ".")
+ (terpri)))))
+
+ (with-current-buffer (help-buffer)
+ (fill-region-as-paragraph pt2 (point))
+ (unless (looking-back "\n\n")
+ (terpri)))))
+ ;; Note that list* etc do not get this property until
+ ;; cl-hack-byte-compiler runs, after bytecomp is loaded.
+ (when (eq (get function 'byte-compile) 'cl-byte-compile-compiler-macro)
+ (princ "This function has a compiler macro")
+ (let ((lib (get function 'compiler-macro-file)))
+ (when (stringp lib)
+ (princ (format " in `%s'" lib))
+ (with-current-buffer standard-output
+ (save-excursion
+ (re-search-backward "`\\([^`']+\\)'" nil t)
+ (help-xref-button 1 'help-function-cmacro function lib)))))
+ (princ ".\n\n"))
+ (let* ((arglist (help-function-arglist def))
+ (doc (documentation function))
+ (usage (help-split-fundoc doc function)))
+ (with-current-buffer standard-output
+ ;; If definition is a keymap, skip arglist note.
+ (unless (keymapp function)
+ (let* ((use (cond
+ (usage (setq doc (cdr usage)) (car usage))
+ ((listp arglist)
+ (format "%S" (help-make-usage function arglist)))
+ ((stringp arglist) arglist)
+ ;; Maybe the arglist is in the docstring of a symbol
+ ;; this one is aliased to.
+ ((let ((fun real-function))
+ (while (and (symbolp fun)
+ (setq fun (symbol-function fun))
+ (not (setq usage (help-split-fundoc
+ (documentation fun)
+ function)))))
+ usage)
+ (car usage))
+ ((or (stringp def)
+ (vectorp def))
+ (format "\nMacro: %s" (format-kbd-macro def)))
+ (t "[Missing arglist. Please make a bug report.]")))
+ (high (help-highlight-arguments use doc)))
+ (let ((fill-begin (point)))
+ (insert (car high) "\n")
+ (fill-region fill-begin (point)))
+ (setq doc (cdr high))))
+ (let* ((obsolete (and
+ ;; function might be a lambda construct.
+ (symbolp function)
+ (get function 'byte-obsolete-info)))
+ (use (car obsolete)))
+ (when obsolete
+ (princ "\nThis function is obsolete")
+ (when (nth 2 obsolete)
+ (insert (format " since %s" (nth 2 obsolete))))
+ (insert (cond ((stringp use) (concat ";\n" use))
+ (use (format ";\nuse `%s' instead." use))
+ (t "."))
+ "\n"))
+ (insert "\n"
+ (or doc "Not documented."))))))))
\f
;; Variables
(if (symbolp v) (symbol-name v))))
(list (if (equal val "")
v (intern val)))))
- (unless (buffer-live-p buffer) (setq buffer (current-buffer)))
- (unless (frame-live-p frame) (setq frame (selected-frame)))
- (if (not (symbolp variable))
- (message "You did not specify a variable")
- (save-excursion
- (let ((valvoid (not (with-current-buffer buffer (boundp variable))))
- val val-start-pos locus)
- ;; Extract the value before setting up the output buffer,
- ;; in case `buffer' *is* the output buffer.
- (unless valvoid
- (with-selected-frame frame
+ (let (file-name)
+ (unless (buffer-live-p buffer) (setq buffer (current-buffer)))
+ (unless (frame-live-p frame) (setq frame (selected-frame)))
+ (if (not (symbolp variable))
+ (message "You did not specify a variable")
+ (save-excursion
+ (let ((valvoid (not (with-current-buffer buffer (boundp variable))))
+ val val-start-pos locus)
+ ;; Extract the value before setting up the output buffer,
+ ;; in case `buffer' *is* the output buffer.
+ (unless valvoid
+ (with-selected-frame frame
+ (with-current-buffer buffer
+ (setq val (symbol-value variable)
+ locus (variable-binding-locus variable)))))
+ (help-setup-xref (list #'describe-variable variable buffer)
+ (called-interactively-p 'interactive))
+ (with-help-window (help-buffer)
(with-current-buffer buffer
- (setq val (symbol-value variable)
- locus (variable-binding-locus variable)))))
- (help-setup-xref (list #'describe-variable variable buffer)
- (interactive-p))
- (with-help-window (help-buffer)
- (with-current-buffer buffer
- (prin1 variable)
- ;; Make a hyperlink to the library if appropriate. (Don't
- ;; change the format of the buffer's initial line in case
- ;; anything expects the current format.)
- (let ((file-name (symbol-file variable 'defvar)))
- (setq file-name (describe-simplify-lib-file-name file-name))
- (when (equal file-name "loaddefs.el")
- ;; Find the real def site of the preloaded variable.
- (let ((location
- (condition-case nil
- (find-variable-noselect variable file-name)
- (error nil))))
- (when location
- (with-current-buffer (car location)
- (when (cdr location)
- (goto-char (cdr location)))
- (when (re-search-backward
- "^;;; Generated autoloads from \\(.*\\)" nil t)
- (setq file-name (match-string 1)))))))
- (when (and (null file-name)
- (integerp (get variable 'variable-documentation)))
- ;; It's a variable not defined in Elisp but in C.
- (setq file-name
- (if (get-buffer " *DOC*")
- (help-C-file-name variable 'var)
- 'C-source)))
+ (prin1 variable)
+ (setq file-name (find-lisp-object-file-name variable 'defvar))
+
(if file-name
(progn
(princ " is a variable defined in `")
- (princ (if (eq file-name 'C-source) "C source code" file-name))
+ (princ (if (eq file-name 'C-source)
+ "C source code"
+ (file-name-nondirectory file-name)))
(princ "'.\n")
(with-current-buffer standard-output
(save-excursion
(use (format ";\n use `%s' instead." (car obsolete)))
(t ".")))
(terpri))
+
+ (when (member (cons variable val) file-local-variables-alist)
+ (setq extra-line t)
+ (if (member (cons variable val) dir-local-variables-alist)
+ (let ((file (and (buffer-file-name)
+ (not (file-remote-p (buffer-file-name)))
+ (dir-locals-find-file (buffer-file-name)))))
+ (princ " This variable is a directory local variable")
+ (when file
+ (princ (concat "\n from the file \""
+ (if (consp file)
+ (car file)
+ file)
+ "\"")))
+ (princ ".\n"))
+ (princ " This variable is a file local variable.\n")))
+
+ (when (memq variable ignored-local-variables)
+ (setq extra-line t)
+ (princ " This variable is ignored when used as a file local \
+variable.\n"))
+
+ ;; Can be both risky and safe, eg auto-fill-function.
+ (when (risky-local-variable-p variable)
+ (setq extra-line t)
+ (princ " This variable is potentially risky when used as a \
+file local variable.\n")
+ (when (assq variable safe-local-variable-values)
+ (princ " However, you have added it to \
+`safe-local-variable-values'.\n")))
+
(when safe-var
(setq extra-line t)
(princ " This variable is safe as a file local variable ")
BUFFER defaults to the current buffer."
(interactive)
(setq buffer (or buffer (current-buffer)))
- (help-setup-xref (list #'describe-syntax buffer) (interactive-p))
+ (help-setup-xref (list #'describe-syntax buffer)
+ (called-interactively-p 'interactive))
(with-help-window (help-buffer)
(let ((table (with-current-buffer buffer (syntax-table))))
(with-current-buffer standard-output
BUFFER should be a buffer or a buffer name."
(interactive)
(setq buffer (or buffer (current-buffer)))
- (help-setup-xref (list #'describe-categories buffer) (interactive-p))
+ (help-setup-xref (list #'describe-categories buffer)
+ (called-interactively-p 'interactive))
(with-help-window (help-buffer)
- (let ((table (with-current-buffer buffer (category-table))))
+ (let* ((table (with-current-buffer buffer (category-table)))
+ (docs (char-table-extra-slot table 0)))
+ (if (or (not (vectorp docs)) (/= (length docs) 95))
+ (error "Invalid first extra slot in this category table\n"))
(with-current-buffer standard-output
+ (insert "Legend of category mnemonics (see the tail for the longer description)\n")
+ (let ((pos (point)) (items 0) lines n)
+ (dotimes (i 95)
+ (if (aref docs i) (setq items (1+ items))))
+ (setq lines (1+ (/ (1- items) 4)))
+ (setq n 0)
+ (dotimes (i 95)
+ (let ((elt (aref docs i)))
+ (when elt
+ (string-match ".*" elt)
+ (setq elt (match-string 0 elt))
+ (if (>= (length elt) 17)
+ (setq elt (concat (substring elt 0 14) "...")))
+ (if (< (point) (point-max))
+ (move-to-column (* 20 (/ n lines)) t))
+ (insert (+ i ?\s) ?: elt)
+ (if (< (point) (point-max))
+ (forward-line 1)
+ (insert "\n"))
+ (setq n (1+ n))
+ (if (= (% n lines) 0)
+ (goto-char pos))))))
+ (goto-char (point-max))
+ (insert "\n"
+ "character(s)\tcategory mnemonics\n"
+ "------------\t------------------")
(describe-vector table 'help-describe-category-set)
- (let ((docs (char-table-extra-slot table 0)))
- (if (or (not (vectorp docs)) (/= (length docs) 95))
- (insert "Invalid first extra slot in this char table\n")
- (insert "Meanings of mnemonic characters are:\n")
- (dotimes (i 95)
- (let ((elt (aref docs i)))
- (when elt
- (insert (+ i ?\s) ": " elt "\n"))))
- (while (setq table (char-table-parent table))
- (insert "\nThe parent category table is:")
- (describe-vector table 'help-describe-category-set))))))))
+ (insert "Legend of category mnemonics:\n")
+ (dotimes (i 95)
+ (let ((elt (aref docs i)))
+ (when elt
+ (if (string-match "\n" elt)
+ (setq elt (substring elt (match-end 0))))
+ (insert (+ i ?\s) ": " elt "\n"))))
+ (while (setq table (char-table-parent table))
+ (insert "\nThe parent category table is:")
+ (describe-vector table 'help-describe-category-set))))))
(provide 'help-fns)
HCoop / bpt / emacs.git / blobdiff