"You have typed %THIS-KEY%, 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.)
-a command-apropos. Give a list of words or a regexp, to get a list of
+a command-apropos. Type a list of words or a regexp; it shows a list of
commands whose names match. See also the apropos 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).
-d apropos-documentation. Give a pattern (a list or words or a regexp), and
- see a list of functions, variables, and other items whose built-in
- doucmentation string matches that pattern. See also the apropos command.
-e view-echo-area-messages. Show the buffer where the echo-area messages
- are stored.
-f describe-function. Type a function name and get its documentation.
-F Info-goto-emacs-command-node. Type a function name;
- it takes you to the on-line manual's section that describes
- the command.
+b describe-bindings. Display a table of all key bindings.
+c describe-key-briefly. Type a key sequence;
+ it displays the command name run by that key sequence.
+C describe-coding-system. Type the name of the coding system to describe,
+ or just RET to describe the ones currently in use.
+d apropos-documentation. Type a pattern (a list of words or a regexp), and
+ it shows a list of functions, variables, and other items whose
+ documentation matches that pattern. See also the apropos command.
+e view-echo-area-messages. Go to the buffer that logs echo-area messages.
+f describe-function. Type a function name and you see its documentation.
+F Info-goto-emacs-command-node. Type a command name;
+ it goes to the on-line manual's section that describes the command.
h Display the HELLO file which illustrates various scripts.
-i info. The Info documentation reader: read on-line manuals.
+i info. The Info documentation reader: read on-line manuals.
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;
+k describe-key. Type a key sequence;
it displays the full documentation for that key sequence.
-K Info-goto-emacs-key-command-node. Type a command key sequence;
- it takes you to the on-line manual's section that describes
+K Info-goto-emacs-key-command-node. Type a key sequence;
+ it goes to the on-line manual's section that describes
the command bound to that key.
l view-lossage. Show last 100 characters you typed.
L describe-language-environment. This describes either a
p finder-by-keyword. Find packages matching a given topic keyword.
r info-emacs-manual. Display the Emacs manual in Info mode.
s describe-syntax. Display contents of syntax table, plus explanations.
-S info-lookup-symbol. Display the definition of a specific symbol
- as found in the manual for the language this buffer is written in.
+S info-lookup-symbol. Type a symbol; it goes to that symbol in the
+ on-line manual for the programming language used in this buffer.
t help-with-tutorial. Select the Emacs learn-by-doing tutorial.
v describe-variable. Type name of a variable;
it displays the variable's documentation and value.
-w where-is. Type command name; it prints which keystrokes
+w where-is. Type a command name; it displays which keystrokes
invoke that command.
. display-local-help. Display any available local help at point
in the echo area.
;; run describe-prefix-bindings.
(setq prefix-help-command 'describe-prefix-bindings)
-(defun view-emacs-news (&optional arg)
+(defun view-emacs-news (&optional version)
"Display info on recent changes to Emacs.
With argument, display info only for the selected version."
(interactive "P")
- (if (not arg)
- (view-file (expand-file-name "NEWS" data-directory))
- (let* ((map (sort
- (delete-dups
- (apply
- 'nconc
- (mapcar
- (lambda (file)
- (with-temp-buffer
- (insert-file-contents
- (expand-file-name file data-directory))
- (let (res)
- (while (re-search-forward
- (if (string-match "^ONEWS\\.[0-9]+$" file)
- "Changes in \\(?:Emacs\\|version\\)?[ \t]*\\([0-9]+\\(?:\\.[0-9]+\\)?\\)"
- "^\* [^0-9\n]*\\([0-9]+\\.[0-9]+\\)") nil t)
- (setq res (cons (list (match-string-no-properties 1)
- file) res)))
- res)))
- (append '("NEWS" "ONEWS")
- (directory-files data-directory nil
- "^ONEWS\\.[0-9]+$" nil)))))
- (lambda (a b)
- (string< (car b) (car a)))))
- (current (caar map))
- (version (completing-read
- (format "Read NEWS for the version (default %s): " current)
- (mapcar 'car map) nil nil nil nil current))
- (file (cadr (assoc version map)))
- res)
- (if (not file)
- (error "No news is good news")
- (view-file (expand-file-name file data-directory))
- (widen)
- (goto-char (point-min))
- (when (re-search-forward
- (concat (if (string-match "^ONEWS\\.[0-9]+$" file)
- "Changes in \\(?:Emacs\\|version\\)?[ \t]*"
- "^\* [^0-9\n]*") version)
- nil t)
- (beginning-of-line)
- (narrow-to-region
- (point)
- (save-excursion
- (while (and (setq res
- (re-search-forward
- (if (string-match "^ONEWS\\.[0-9]+$" file)
- "Changes in \\(?:Emacs\\|version\\)?[ \t]*\\([0-9]+\\(?:\\.[0-9]+\\)?\\)"
- "^\* [^0-9\n]*\\([0-9]+\\.[0-9]+\\)") nil t))
- (equal (match-string-no-properties 1) version)))
- (or res (goto-char (point-max)))
- (beginning-of-line)
- (point))))))))
+ (unless version
+ (setq version emacs-major-version))
+ (when (consp version)
+ (let* ((all-versions
+ (let (res)
+ (mapcar
+ (lambda (file)
+ (with-temp-buffer
+ (insert-file-contents
+ (expand-file-name file data-directory))
+ (while (re-search-forward
+ (if (member file '("NEWS.18" "NEWS.1-17"))
+ "Changes in \\(?:Emacs\\|version\\)?[ \t]*\\([0-9]+\\(?:\\.[0-9]+\\)?\\)"
+ "^\* [^0-9\n]*\\([0-9]+\\.[0-9]+\\)") nil t)
+ (setq res (cons (match-string-no-properties 1) res)))))
+ (cons "NEWS"
+ (directory-files data-directory nil
+ "^NEWS\\.[0-9][-0-9]*$" nil)))
+ (sort (delete-dups res) (lambda (a b) (string< b a)))))
+ (current (car all-versions)))
+ (setq version (completing-read
+ (format "Read NEWS for the version (default %s): " current)
+ all-versions nil nil nil nil current))
+ (if (integerp (string-to-number version))
+ (setq version (string-to-number version))
+ (unless (or (member version all-versions)
+ (<= (string-to-number version) (string-to-number current)))
+ (error "No news about version %s" version)))))
+ (when (integerp version)
+ (cond ((<= version 12)
+ (setq version (format "1.%d" version)))
+ ((<= version 18)
+ (setq version (format "%d" version)))
+ ((> version emacs-major-version)
+ (error "No news about emacs %d (yet)" version))))
+ (let* ((vn (if (stringp version)
+ (string-to-number version)
+ version))
+ (file (cond
+ ((>= vn emacs-major-version) "NEWS")
+ ((< vn 18) "NEWS.1-17")
+ (t (format "NEWS.%d" vn))))
+ res)
+ (view-file (expand-file-name file data-directory))
+ (widen)
+ (goto-char (point-min))
+ (when (stringp version)
+ (when (re-search-forward
+ (concat (if (< vn 19)
+ "Changes in Emacs[ \t]*"
+ "^\* [^0-9\n]*") version "$")
+ nil t)
+ (beginning-of-line)
+ (narrow-to-region
+ (point)
+ (save-excursion
+ (while (and (setq res
+ (re-search-forward
+ (if (< vn 19)
+ "Changes in \\(?:Emacs\\|version\\)?[ \t]*\\([0-9]+\\(?:\\.[0-9]+\\)?\\)"
+ "^\* [^0-9\n]*\\([0-9]+\\.[0-9]+\\)") nil t))
+ (equal (match-string-no-properties 1) version)))
+ (or res (goto-char (point-max)))
+ (beginning-of-line)
+ (point)))))))
+
(defun view-todo (&optional arg)
"Display the Emacs TODO list."