38.4.1 Displaying Messages in the Echo Area

This section describes the functions for explicitly producing echo area messages. Many other Emacs features display messages there, too.

Function: message format-string &rest arguments

This function displays a message in the echo area. The argument format-string is similar to a C language printf format string. See format in Formatting Strings, for the details on the conversion specifications. message returns the constructed string.

In batch mode, message prints the message text on the standard error stream, followed by a newline.

If format-string, or strings among the arguments, have face text properties, these affect the way the message is displayed.

If format-string is nil or the empty string, message clears the echo area; if the echo area has been expanded automatically, this brings it back to its normal size. If the minibuffer is active, this brings the minibuffer contents back onto the screen immediately.

(message "Minibuffer depth is %d." (minibuffer-depth)) -| Minibuffer depth is 0. ⇒ "Minibuffer depth is 0." ---------- Echo Area ---------- Minibuffer depth is 0. ---------- Echo Area ----------

To automatically display a message in the echo area or in a pop-buffer, depending on its size, use display-message-or-buffer (see below).

Macro: with-temp-message message &rest body

This construct displays a message in the echo area temporarily, during the execution of body. It displays message, executes body, then returns the value of the last body form while restoring the previous echo area contents.

Function: message-or-box format-string &rest arguments

This function displays a message like message, but may display it in a dialog box instead of the echo area. If this function is called in a command that was invoked using the mouse—more precisely, if last-nonmenu-event (voir la section Information from the Command Loop) is either nil or a list—then it uses a dialog box or pop-up menu to display the message. Otherwise, it uses the echo area. (This is the same criterion that y-or-n-p uses to make a similar decision; see Yes-or-No Queries.)

You can force use of the mouse or of the echo area by binding last-nonmenu-event to a suitable value around the call.

Function: message-box format-string &rest arguments

This function displays a message like message, but uses a dialog box (or a pop-up menu) whenever that is possible. If it is impossible to use a dialog box or pop-up menu, because the terminal does not support them, then message-box uses the echo area, like message.

Function: display-message-or-buffer message &optional buffer-name not-this-window frame

This function displays the message message, which may be either a string or a buffer. If it is shorter than the maximum height of the echo area, as defined by max-mini-window-height, it is displayed in the echo area, using message. Otherwise, display-buffer is used to show it in a pop-up buffer.

Returns either the string shown in the echo area, or when a pop-up buffer is used, the window used to display it.

If message is a string, then the optional argument buffer-name is the name of the buffer used to display it when a pop-up buffer is used, defaulting to ‘*Message*’. In the case where message is a string and displayed in the echo area, it is not specified whether the contents are inserted into the buffer anyway.

The optional arguments not-this-window and frame are as for display-buffer, and only used if a buffer is displayed.

Function: current-message

This function returns the message currently being displayed in the echo area, or nil if there is none.

Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.