diff options
Diffstat (limited to 'lisp/help-macro.el')
| -rw-r--r-- | lisp/help-macro.el | 31 |
1 files changed, 21 insertions, 10 deletions
diff --git a/lisp/help-macro.el b/lisp/help-macro.el index d168c88896f..2e1f88f0a40 100644 --- a/lisp/help-macro.el +++ b/lisp/help-macro.el @@ -71,6 +71,14 @@ (provide 'help-macro) (require 'backquote) +;;;###autoload +(defvar three-step-help nil + "*Non-nil means give more info about Help command in three steps. +The three steps are simple prompt, prompt with all options, +and window listing and describing the options. +A value of nil means skip the middle step, so that +\\[help-command] \\[help-command] gives the window that lists the options.") + (defmacro make-help-screen (fname help-line help-text helped-map) "Construct help-menu function name FNAME. When invoked, FNAME shows HELP-LINE and reads a command using HELPED-MAP. @@ -83,7 +91,8 @@ and then returns." (interactive) (let ((line-prompt (substitute-command-keys (, help-line)))) - (message line-prompt) + (if three-step-help + (message line-prompt)) (let* ((overriding-local-map (make-sparse-keymap)) (minor-mode-map-alist nil) config key char help-screen) @@ -92,8 +101,10 @@ and then returns." (setcdr overriding-local-map (, helped-map)) (define-key overriding-local-map [t] 'undefined) (setq help-screen (documentation (quote (, fname)))) - (setq key (read-key-sequence nil)) - (setq char (aref key 0)) + (if three-step-help + (setq key (read-key-sequence nil) + char (aref key 0)) + (setq char ??)) (if (or (eq char ??) (eq char help-char)) (progn (setq config (current-window-configuration)) @@ -101,23 +112,23 @@ and then returns." (erase-buffer) (insert help-screen) (goto-char (point-min)) - (while (or (memq char (cons help-char '(?? ?\C-v ?\ ?\177 ?\M-v))) + (while (or (memq char (cons help-char '(?? ?\C-v ?\ ?\177 delete ?\M-v))) (equal key "\M-v")) (setq list (cons key list)) (condition-case nil (progn (if (memq char '(?\C-v ?\ )) (scroll-up)) - (if (or (memq char '(?\177 ?\M-v)) + (if (or (memq char '(?\177 ?\M-v delete)) (equal key "\M-v")) (scroll-down))) (error nil)) - (message "%s%s: " - line-prompt - (if (pos-visible-in-window-p (point-max)) - "" " or Space to scroll")) (let ((cursor-in-echo-area t)) - (setq key (read-key-sequence nil) + (setq key (read-key-sequence + (format "Type one of the options listed%s: " + (if (pos-visible-in-window-p + (point-max)) + "" " or Space to scroll"))) char (aref key 0)))) (setq list (cons key list)))) ;; Mouse clicks are not part of the help feature, |