;;; Commentary:
-;; This code implements GNU Emac's on-line help system, the one invoked by
+;; This code implements GNU Emacs' on-line help system, the one invoked by
;;`M-x help-for-help'.
;;; Code:
(define-key help-map "\C-d" 'describe-distribution)
(define-key help-map "\C-w" 'describe-no-warranty)
(define-key help-map "\C-p" 'describe-project)
-(define-key help-map "a" 'command-apropos)
+(define-key help-map "a" 'apropos-command)
(define-key help-map "b" 'describe-bindings)
(define-key help-map "i" 'info)
(define-key help-map "\C-f" 'Info-goto-emacs-command-node)
(define-key help-map "\C-k" 'Info-goto-emacs-key-command-node)
+(define-key help-map "\C-i" 'info-lookup-symbol)
(define-key help-map "l" 'view-lossage)
(define-key help-map "q" 'help-quit)
(defvar help-font-lock-keywords
- (let ((name-char "[-+a-zA-Z0-9_*]") (sym-char "[-+a-zA-Z0-9_:*]"))
- (list
- ;;
- ;; The symbol itself.
- (list (concat "\\`\\(" name-char "+\\)\\(:\\)?")
- '(1 (if (match-beginning 2)
- font-lock-function-name-face
- font-lock-variable-name-face)
- nil t))
- ;;
- ;; Words inside `' which tend to be symbol names.
- (list (concat "`\\(" sym-char sym-char "+\\)'")
- 1 'font-lock-reference-face t)
- ;;
- ;; CLisp `:' keywords as references.
- (list (concat "\\<:" sym-char "+\\>") 0 'font-lock-reference-face t)))
+ (eval-when-compile
+ (let ((name-char "[-+a-zA-Z0-9_*]") (sym-char "[-+a-zA-Z0-9_:*]"))
+ (list
+ ;;
+ ;; The symbol itself.
+ (list (concat "\\`\\(" name-char "+\\)\\(\\(:\\)\\|\\('\\)\\)")
+ '(1 (if (match-beginning 3)
+ font-lock-function-name-face
+ font-lock-variable-name-face)))
+ ;;
+ ;; Words inside `' which tend to be symbol names.
+ (list (concat "`\\(" sym-char sym-char "+\\)'")
+ 1 'font-lock-reference-face t)
+ ;;
+ ;; CLisp `:' keywords as references.
+ (list (concat "\\<:" sym-char "+\\>") 0 'font-lock-reference-face t))))
"Default expressions to highlight in Help mode.")
(defun help-mode ()
(make-local-variable 'font-lock-defaults)
(setq font-lock-defaults '(help-font-lock-keywords))
(view-mode)
+ (make-local-variable 'view-no-disable-on-exit)
+ (setq view-no-disable-on-exit t)
(run-hooks 'help-mode-hook))
+(defun help-mode-maybe ()
+ (if (eq major-mode 'fundamental-mode)
+ (help-mode)))
+
+(add-hook 'temp-buffer-show-hook 'help-mode-maybe)
+
(defun help-quit ()
(interactive)
nil)
-(defun help-with-tutorial ()
- "Select the Emacs learn-by-doing tutorial."
- (interactive)
- (let ((file (expand-file-name "~/TUTORIAL")))
+(defvar help-with-tutorial-alist
+ '(("German" . "TUTORIAL.de")
+ ("Korean" . "TUTORIAL.kr")
+ ("Japanese" . "TUTORIAL.jp")
+ ("Thai" . "TUTORIAL.th")
+ ("English" . "TUTORIAL"))
+ "Alist mapping language names to their translated Emacs tutorial files.")
+
+(defun help-with-tutorial (&optional arg)
+ "Select the Emacs learn-by-doing tutorial.
+If there is a tutorial version written in the language
+of the selected language environment, that version is used.
+If there's no tutorial in that language, `TUTORIAL' is selected.
+With arg, you are asked to choose which language."
+ (interactive "P")
+ (let (lang filename file)
+ (if arg
+ (or (setq lang
+ (let* ((completion-ignore-case t))
+ (completing-read "Language: " help-with-tutorial-alist
+ nil t)))
+ (error "No tutorial file in language"))
+ (setq lang current-language-environment))
+ (setq filename (or (cdr (assoc lang help-with-tutorial-alist))
+ "TUTORIAL"))
+ (setq file (expand-file-name (concat "~/" filename)))
(delete-other-windows)
(if (get-file-buffer file)
(switch-to-buffer (get-file-buffer file))
(setq buffer-file-name file)
(setq default-directory (expand-file-name "~/"))
(setq buffer-auto-save-file-name nil)
- (insert-file-contents (expand-file-name "TUTORIAL" data-directory))
+ (insert-file-contents (expand-file-name filename data-directory))
(goto-char (point-min))
(search-forward "\n<<")
(beginning-of-line)
(goto-char (point-min))
(set-buffer-modified-p nil))))
-(defun describe-key-briefly (key)
- "Print the name of the function KEY invokes. KEY is a string."
- (interactive "kDescribe key briefly: ")
+(defun describe-key-briefly (key &optional insert)
+ "Print the name of the function KEY invokes. KEY is a string.
+If INSERT (the prefix arg) is non-nil, insert the message in the buffer."
+ (interactive "kDescribe key briefly: \nP")
;; If this key seq ends with a down event, discard the
;; following click or drag event. Otherwise that would
;; erase the message.
(read-event)))
(save-excursion
(let ((modifiers (event-modifiers (aref key 0)))
+ (standard-output (if insert (current-buffer) t))
window position)
;; For a mouse button event, go to the button it applies to
;; to get the right key bindings. And go to the right place
(set-buffer (window-buffer window))
(goto-char position)))
;; Ok, now look up the key and name the command.
- (let ((defn (key-binding key)))
+ (let ((defn (key-binding key))
+ (key-desc (key-description key)))
(if (or (null defn) (integerp defn))
- (message "%s is undefined" (key-description key))
- (message (if (windowp window)
- "%s at that spot runs the command %s"
- "%s runs the command %s")
- (key-description key)
- (if (symbolp defn) defn (prin1-to-string defn))))))))
+ (princ (format "%s is undefined" key-desc))
+ (princ (format (if insert
+ "%s (%s)"
+ (if (windowp window)
+ "%s at that spot runs the command %s"
+ "%s runs the command %s"))
+ key-desc
+ (if (symbolp defn) defn (prin1-to-string defn)))))))))
(defun print-help-return-message (&optional function)
"Display or return message saying how to restore windows after help command.
If FUNCTION is nil, applies `message' to it, thus printing it."
(and (not (get-buffer-window standard-output))
(let ((first-message
- (cond ((or (member (buffer-name standard-output)
- special-display-buffer-names)
- (assoc (buffer-name standard-output)
- special-display-buffer-names)
- (let (found
- (tail special-display-regexps)
- (name (buffer-name standard-output)))
- (while (and tail (not found))
- (if (or (and (consp (car tail))
- (string-match (car (car tail)) name))
- (and (stringp (car tail))
- (string-match (car tail) name)))
- (setq found t))
- (setq tail (cdr tail)))
- found))
+ (cond ((special-display-p (buffer-name standard-output))
;; If the help output buffer is a special display buffer,
;; don't say anything about how to get rid of it.
;; First of all, the user will do that with the window
;; manager, not with Emacs.
;; Secondly, the buffer has not been displayed yet,
;; so we don't know whether its frame will be selected.
- ;; Even the message about scrolling the help
- ;; might be wrong, but it seems worth showing it anyway.
nil)
((not (one-window-p t))
"Type \\[switch-to-buffer-other-window] RET to restore the other window.")
(if first-message " " "")
;; If the help buffer will go in a separate frame,
;; it's no use mentioning a command to scroll, so don't.
- (if (or (member (buffer-name standard-output)
- special-display-buffer-names)
- (assoc (buffer-name standard-output)
- special-display-buffer-names)
- (memq t (mapcar '(lambda (elt)
- (if (consp elt)
- (setq elt (car elt)))
- (string-match elt (buffer-name standard-output)))
- special-display-regexps)))
+ (if (special-display-p (buffer-name standard-output))
nil
- (if (or (member (buffer-name standard-output)
- same-window-buffer-names)
- (assoc (buffer-name standard-output)
- same-window-buffer-names)
- (memq t (mapcar '(lambda (elt)
- (if (consp elt)
- (setq elt (car elt)))
- (string-match elt (buffer-name standard-output)))
- same-window-regexps)))
+ (if (same-window-p (buffer-name standard-output))
;; Say how to scroll this window.
(substitute-command-keys
"\\[scroll-up] to scroll the help.")
(princ " at that spot"))
(princ " runs the command ")
(prin1 defn)
- (princ ":\n")
+ (princ "\n")
(let ((doc (documentation defn)))
(if doc
(progn (terpri)
(princ doc))
(princ "not documented")))
- (save-excursion
- (set-buffer standard-output)
- (help-mode))
(print-help-return-message)))))))
(defun describe-mode ()
(interactive)
(with-output-to-temp-buffer "*Help*"
(let ((minor-modes minor-mode-alist)
- (locals (buffer-local-variables)))
+ (first t))
(while minor-modes
(let* ((minor-mode (car (car minor-modes)))
- (indicator (car (cdr (car minor-modes))))
- (local-binding (assq minor-mode locals)))
+ (indicator (car (cdr (car minor-modes)))))
;; Document a minor mode if it is listed in minor-mode-alist,
;; bound locally in this buffer, non-nil, and has a function
;; definition.
- (if (and local-binding
- (cdr local-binding)
+ (if (and (symbol-value minor-mode)
(fboundp minor-mode))
(let ((pretty-minor-mode minor-mode))
(if (string-match "-mode$" (symbol-name minor-mode))
0 (match-beginning 0)))))
(while (and indicator (symbolp indicator))
(setq indicator (symbol-value indicator)))
+ (if first
+ (princ "The minor modes are described first,
+followed by the major mode, which is described on the last page.\n\f\n"))
+ (setq first nil)
(princ (format "%s minor mode (%s):\n"
pretty-minor-mode
(if indicator
(format "indicator%s" indicator)
"no indicator")))
(princ (documentation minor-mode))
- (princ "\n\n"))))
+ (princ "\n\f\n"))))
(setq minor-modes (cdr minor-modes))))
(princ mode-name)
(princ " mode:\n")
(princ (documentation major-mode))
- (save-excursion
- (set-buffer standard-output)
- (help-mode))
(print-help-return-message)))
;; So keyboard macro definitions are documented correctly
(goto-char (point-min))
(while (progn (move-to-column 50) (not (eobp)))
(search-forward " " nil t)
- (insert "\n"))
- (help-mode))
+ (insert "\n")))
(print-help-return-message)))
(defalias 'help 'help-for-help)
(make-help-screen help-for-help
- "a b c f C-f i k C-k l m n p s t v w C-c C-d C-n C-w, or ? for more help:"
+ "a b c C f F C-f i I k C-k l L m n p s t v w C-c C-d C-n C-p C-w; ? for help:"
"You have typed \\[help-command], the help character. Type a Help option:
\(Use SPC or DEL to scroll through this text. Type \\<help-map>\\[help-quit] to exit the Help command.)
b describe-bindings. Display table of all key bindings.
c describe-key-briefly. Type a command key sequence;
it prints the function name that sequence runs.
+C describe-coding-system. This describes either a specific coding system
+ (if you type its name) or the coding systems currently in use
+ (if you type just RET).
f describe-function. Type a function name and get documentation of it.
C-f Info-goto-emacs-command-node. Type a function name;
it takes you to the Info node for that command.
-F view-emacs-FAQ. Shows emacs frequently asked questions file.
i info. The info documentation reader.
+I describe-input-method. Describe a specific input method (if you type
+ its name) or the current input method (if you type just RET).
k describe-key. Type a command key sequence;
it displays the full documentation.
C-k Info-goto-emacs-key-command-node. Type a command key sequence;
it takes you to the Info node for the command bound to that key.
l view-lossage. Shows last 100 characters you typed.
-m describe-mode. Print documentation of current major mode,
- which describes the commands peculiar to it.
+L describe-language-environment. This describes either the a
+ specific language environment (if you type its name)
+ or the current language environment (if you type just RET).
+m describe-mode. Print documentation of current minor modes,
+ and the current major mode, including their special commands.
n view-emacs-news. Shows emacs news file.
p finder-by-keyword. Find packages matching a given topic keyword.
s describe-syntax. Display contents of syntax table, plus explanations
it displays the variable's documentation and value.
w where-is. Type command name; it prints which keystrokes
invoke that command.
-C-c print Emacs copying permission (General Public License).
-C-d print Emacs ordering information.
-C-n print news of recent Emacs changes.
-C-p print information about the GNU project.
-C-w print information on absence of warranty for GNU Emacs."
+
+F Display the frequently asked questions file.
+h Display the HELLO file which illustrates various scripts.
+C-c Display Emacs copying permission (General Public License).
+C-d Display Emacs ordering information.
+C-n Display news of recent Emacs changes.
+C-p Display information about the GNU project.
+C-w Display information on absence of warranty for GNU Emacs."
help-map)
;; Return a function which is called by the list containing point.
;; If that gives no function, return a function whose name is around point.
;; If that doesn't give a function, return nil.
(defun function-called-at-point ()
- (or (condition-case ()
- (save-excursion
- (save-restriction
- (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
- (backward-up-list 1)
- (forward-char 1)
- (let (obj)
- (setq obj (read (current-buffer)))
- (and (symbolp obj) (fboundp obj) obj))))
- (error nil))
- (condition-case ()
- (let ((stab (syntax-table)))
- (unwind-protect
+ (let ((stab (syntax-table)))
+ (set-syntax-table emacs-lisp-mode-syntax-table)
+ (unwind-protect
+ (or (condition-case ()
+ (save-excursion
+ (save-restriction
+ (narrow-to-region (max (point-min) (- (point) 1000)) (point-max))
+ ;; Move up to surrounding paren, then after the open.
+ (backward-up-list 1)
+ (forward-char 1)
+ ;; If there is space here, this is probably something
+ ;; other than a real Lisp function call, so ignore it.
+ (if (looking-at "[ \t]")
+ (error "Probably not a Lisp function call"))
+ (let (obj)
+ (setq obj (read (current-buffer)))
+ (and (symbolp obj) (fboundp obj) obj))))
+ (error nil))
+ (condition-case ()
(save-excursion
- (set-syntax-table emacs-lisp-mode-syntax-table)
(or (not (zerop (skip-syntax-backward "_w")))
(eq (char-syntax (following-char)) ?w)
(eq (char-syntax (following-char)) ?_)
(skip-chars-forward "'")
(let ((obj (read (current-buffer))))
(and (symbolp obj) (fboundp obj) obj)))
- (set-syntax-table stab)))
- (error nil))))
+ (error nil)))
+ (set-syntax-table stab))))
(defun describe-function-find-file (function)
(let ((files load-history)
(setq val (completing-read (if fn
(format "Describe function (default %s): " fn)
"Describe function: ")
- obarray 'fboundp t))
+ obarray 'fboundp t nil nil (symbol-name fn)))
(list (if (equal val "")
fn (intern val)))))
- (with-output-to-temp-buffer "*Help*"
- (prin1 function)
- (princ ": ")
- (let* ((def (symbol-function function))
- file-name
- (beg (if (commandp def) "an interactive " "a ")))
- (princ (cond ((or (stringp def)
- (vectorp def))
- "a keyboard macro")
- ((subrp def)
- (concat beg "built-in function"))
- ((byte-code-function-p def)
- (concat beg "compiled Lisp function"))
- ((symbolp def)
- (format "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) 'mocklisp)
- "a mocklisp function")
- ((eq (car-safe def) 'autoload)
- (setq file-name (nth 1 def))
- (format "%s autoloaded Lisp %s"
- (if (commandp def) "an interactive" "an")
- (if (nth 4 def) "macro" "function")
- ))
- (t "")))
- (or file-name
- (setq file-name (describe-function-find-file function)))
- (if file-name
- (progn
- (princ " in `")
- ;; We used to add .el to the file name,
- ;; but that's completely wrong when the user used load-file.
- (princ file-name)
- (princ "'")))
- (princ ".")
- (terpri)
- (let ((arglist (cond ((byte-code-function-p def)
- (car (append def nil)))
- ((eq (car-safe def) 'lambda)
- (nth 1 def))
- (t t))))
- (if (listp arglist)
- (progn
- (princ (cons function
- (mapcar (lambda (arg)
- (if (memq arg '(&optional &rest))
- arg
- (intern (upcase (symbol-name arg)))))
- arglist)))
- (terpri))))
- (let ((doc (documentation function)))
- (if doc
- (progn (terpri)
- (princ doc))
- (princ "not documented"))))
- (print-help-return-message)
- (save-excursion
- (set-buffer standard-output)
- (help-mode)
- ;; Return the text we displayed.
- (buffer-string))))
-
+ (if function
+ (with-output-to-temp-buffer "*Help*"
+ (prin1 function)
+ ;; Use " is " instead of a colon so that
+ ;; it is easier to get out the function name using forward-sexp.
+ (princ " is ")
+ (let* ((def (symbol-function function))
+ file-name
+ (beg (if (commandp def) "an interactive " "a ")))
+ (princ (cond ((or (stringp def)
+ (vectorp def))
+ "a keyboard macro")
+ ((subrp def)
+ (concat beg "built-in function"))
+ ((byte-code-function-p def)
+ (concat beg "compiled Lisp function"))
+ ((symbolp def)
+ (format "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) 'mocklisp)
+ "a mocklisp function")
+ ((eq (car-safe def) 'autoload)
+ (setq file-name (nth 1 def))
+ (format "%s autoloaded Lisp %s"
+ (if (commandp def) "an interactive" "an")
+ (if (nth 4 def) "macro" "function")
+ ))
+ (t "")))
+ (or file-name
+ (setq file-name (describe-function-find-file function)))
+ (if file-name
+ (progn
+ (princ " in `")
+ ;; We used to add .el to the file name,
+ ;; but that's completely wrong when the user used load-file.
+ (princ file-name)
+ (princ "'")))
+ (princ ".")
+ (terpri)
+ (let* ((inner-function (if (and (listp def) 'macro)
+ (cdr def)
+ def))
+ (arglist (cond ((byte-code-function-p inner-function)
+ (car (append inner-function nil)))
+ ((eq (car-safe inner-function) 'lambda)
+ (nth 1 inner-function))
+ (t t))))
+ (if (listp arglist)
+ (progn
+ (princ (cons function
+ (mapcar (lambda (arg)
+ (if (memq arg '(&optional &rest))
+ arg
+ (intern (upcase (symbol-name arg)))))
+ arglist)))
+ (terpri))))
+ (let ((doc (documentation function)))
+ (if doc
+ (progn (terpri)
+ (princ doc))
+ (princ "not documented"))))
+ (print-help-return-message)
+ (save-excursion
+ (set-buffer standard-output)
+ ;; Return the text we displayed.
+ (buffer-string)))
+ (message "You didn't specify a function")))
+
+;; We return 0 if we can't find a variable to return.
(defun variable-at-point ()
(condition-case ()
(let ((stab (syntax-table)))
(forward-sexp -1))
(skip-chars-forward "'")
(let ((obj (read (current-buffer))))
- (and (symbolp obj) (boundp obj) obj)))
+ (or (and (symbolp obj) (boundp obj) obj)
+ 0)))
(set-syntax-table stab)))
- (error nil)))
+ (error 0)))
(defun describe-variable (variable)
"Display the full documentation of VARIABLE (a symbol).
(let ((v (variable-at-point))
(enable-recursive-minibuffers t)
val)
- (setq val (completing-read (if v
+ (setq val (completing-read (if (symbolp v)
(format "Describe variable (default %s): " v)
"Describe variable: ")
- obarray 'boundp t))
+ obarray 'boundp t nil nil
+ (if (symbolp v) (symbol-name v))))
(list (if (equal val "")
v (intern val)))))
- (with-output-to-temp-buffer "*Help*"
- (prin1 variable)
- (if (not (boundp variable))
- (princ " is void")
- (princ "'s value is ")
- (prin1 (symbol-value variable)))
- (terpri)
- (if (local-variable-p variable)
- (progn
- (princ (format "Local in buffer %s; " (buffer-name)))
- (if (not (default-boundp variable))
- (princ "globally void")
- (princ "global value is ")
- (prin1 (default-value variable)))
- (terpri)))
- (terpri)
- (princ "Documentation:")
- (terpri)
- (let ((doc (documentation-property variable 'variable-documentation)))
- (princ (or doc "not documented as a variable.")))
- (print-help-return-message)
- (save-excursion
- (set-buffer standard-output)
- (help-mode)
- ;; Return the text we displayed.
- (buffer-string))))
+ (if (symbolp variable)
+ (let (valvoid)
+ (with-output-to-temp-buffer "*Help*"
+ (prin1 variable)
+ (if (not (boundp variable))
+ (progn
+ (princ " is void")
+ (terpri)
+ (setq valvoid t))
+ (princ "'s value is ")
+ (terpri)
+ (pp (symbol-value variable))
+ (terpri))
+ (if (local-variable-p variable)
+ (progn
+ (princ (format "Local in buffer %s; " (buffer-name)))
+ (if (not (default-boundp variable))
+ (princ "globally void")
+ (princ "global value is ")
+ (terpri)
+ (pp (default-value variable)))
+ (terpri)))
+ (terpri)
+ (save-current-buffer
+ (set-buffer standard-output)
+ (if (> (count-lines (point-min) (point-max)) 10)
+ (progn
+ (goto-char (point-min))
+ (if valvoid
+ (forward-line 1)
+ (forward-sexp 1)
+ (delete-region (point) (progn (end-of-line) (point)))
+ (insert "'s value is shown below.\n\n")
+ (save-excursion
+ (insert "\n\nValue:"))))))
+ (princ "Documentation:")
+ (terpri)
+ (let ((doc (documentation-property variable 'variable-documentation)))
+ (princ (or doc "not documented as a variable.")))
+ (print-help-return-message)
+ (save-excursion
+ (set-buffer standard-output)
+ ;; Return the text we displayed.
+ (buffer-string))))
+ (message "You did not specify a variable")))
-(defun where-is (definition)
+(defun describe-bindings (&optional prefix)
+ "Show a list of all defined keys, and their definitions.
+We put that list in a buffer, and display the buffer.
+
+The optional argument PREFIX, if non-nil, should be a key sequence;
+then we display only bindings that start with that prefix."
+ (interactive "p")
+ (describe-bindings-internal nil prefix))
+
+(defun where-is (definition &optional insert)
"Print message listing key sequences that invoke specified command.
-Argument is a command definition, usually a symbol with a function definition."
+Argument is a command definition, usually a symbol with a function definition.
+If INSERT (the prefix arg) is non-nil, insert the message in the buffer."
(interactive
(let ((fn (function-called-at-point))
(enable-recursive-minibuffers t)
"Where is command: ")
obarray 'fboundp t))
(list (if (equal val "")
- fn (intern val)))))
+ fn (intern val))
+ current-prefix-arg)))
(let* ((keys (where-is-internal definition overriding-local-map nil nil))
- (keys1 (mapconcat 'key-description keys ", ")))
- (if (> (length keys1) 0)
- (message "%s is on %s" definition keys1)
- (message "%s is not on any key" definition)))
+ (keys1 (mapconcat 'key-description keys ", "))
+ (standard-output (if insert (current-buffer) t)))
+ (if insert
+ (if (> (length keys1) 0)
+ (princ (format "%s (%s)" keys1 definition))
+ (princ (format "M-x %s RET" definition)))
+ (if (> (length keys1) 0)
+ (princ (format "%s is on %s" definition keys1))
+ (princ (format "%s is not on any key" definition)))))
nil)
-(defun locate-library (library &optional nosuffix)
- "Show the full path name of Emacs library LIBRARY.
+(defun locate-library (library &optional nosuffix path interactive-call)
+ "Show the precise file name of Emacs library LIBRARY.
This command searches the directories in `load-path' like `M-x load-library'
to find the file that `M-x load-library RET LIBRARY RET' would load.
Optional second arg NOSUFFIX non-nil means don't add suffixes `.elc' or `.el'
-to the specified name LIBRARY (a la calling `load' instead of `load-library')."
- (interactive "sLocate library: ")
- (catch 'answer
- (mapcar
- '(lambda (dir)
- (mapcar
- '(lambda (suf)
+to the specified name LIBRARY.
+
+If the optional third arg PATH is specified, that list of directories
+is used instead of `load-path'."
+ (interactive (list (read-string "Locate library: ")
+ nil nil
+ t))
+ (let (result)
+ (catch 'answer
+ (mapcar
+ (lambda (dir)
+ (mapcar
+ (lambda (suf)
(let ((try (expand-file-name (concat library suf) dir)))
(and (file-readable-p try)
(null (file-directory-p try))
(progn
- (message "Library is file %s" try)
+ (setq result try)
(throw 'answer try)))))
- (if nosuffix '("") '(".elc" ".el" ""))))
- load-path)
- (message "No library %s in search path" library)
- nil))
+ (if nosuffix
+ '("")
+ '(".elc" ".el" "")
+;;; load doesn't handle this yet.
+;;; (let ((basic '(".elc" ".el" ""))
+;;; (compressed '(".Z" ".gz" "")))
+;;; ;; If autocompression mode is on,
+;;; ;; consider all combinations of library suffixes
+;;; ;; and compression suffixes.
+;;; (if (rassq 'jka-compr-handler file-name-handler-alist)
+;;; (apply 'nconc
+;;; (mapcar (lambda (compelt)
+;;; (mapcar (lambda (baselt)
+;;; (concat baselt compelt))
+;;; basic))
+;;; compressed))
+;;; basic))
+ )))
+ (or path load-path)))
+ (and interactive-call
+ (if result
+ (message "Library is file %s" result)
+ (message "No library %s in search path" library)))
+ result))
;;; help.el ends here
HCoop / bpt / emacs.git / blobdiff