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(make-help-screen): Handle mouse events.

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Be smart about window configurations--when and whether to restore.
This commit is contained in:
Richard M. Stallman 1993-05-26 19:12:18 +00:00
parent bc2ada626a
commit c968e96c80
1 changed files with 39 additions and 24 deletions
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63
lisp/help-macro.el
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@ -81,30 +81,45 @@ from the HELPED-MAP and the corresponding interactive function is executed."
(let ((line-prompt
(substitute-command-keys (, help-line))))
(message line-prompt)
(let ((char (read-char)))
(if (or (= char ??) (= char help-char))
(save-window-excursion
(switch-to-buffer-other-window "*Help*")
(erase-buffer)
(insert (documentation (quote (, fname))))
(goto-char (point-min))
(while (memq char (cons help-char '(?? ?\C-v ?\ ?\177 ?\M-v)))
(if (memq char '(?\C-v ?\ ))
(scroll-up))
(if (memq char '(?\177 ?\M-v))
(scroll-down))
(message "%s%s: "
line-prompt
(if (pos-visible-in-window-p (point-max))
"" " or Space to scroll"))
(let ((cursor-in-echo-area t))
(setq char (read-char))))))
(let ((defn (cdr (assq (downcase char) (, helped-map)))))
(if defn
(if (keymapp defn)
(error "sorry, this command cannot be run from the help screen. Start over.")
(call-interactively defn))
(ding))))))
(let ((char (read-event))
config)
(unwind-protect
(progn
(if (or (eq char ??) (eq char help-char))
(progn
(setq config (current-window-configuration))
(switch-to-buffer-other-window "*Help*")
(erase-buffer)
(insert (documentation (quote (, fname))))
(goto-char (point-min))
(while (memq char (cons help-char '(?? ?\C-v ?\ ?\177 ?\M-v)))
(if (memq char '(?\C-v ?\ ))
(scroll-up))
(if (memq char '(?\177 ?\M-v))
(scroll-down))
(message "%s%s: "
line-prompt
(if (pos-visible-in-window-p (point-max))
"" " or Space to scroll"))
(let ((cursor-in-echo-area t))
(setq char (read-event))))))
(let ((defn (cdr (assq (if (integerp char) (downcase char) char) (, helped-map)))))
(if defn
(if (keymapp defn)
(error "sorry, this command cannot be run from the help screen. Start over.")
(if config
(progn
(set-window-configuration config)
(setq config nil)))
(call-interactively defn))
(if (listp char)
(setq unread-command-events
(cons char unread-command-events)
config nil)
(ding)))))
(if config
(set-window-configuration config))))))
))
;;; help-macro.el