@menu
* Refresh Screen:: Clearing the screen and redrawing everything on it.
-* Screen Size:: How big is the Emacs screen.
* Truncation:: Folding or wrapping long text lines.
* The Echo Area:: Where messages are displayed.
* Invisible Text:: Hiding part of the buffer text.
@section Refreshing the Screen
The function @code{redraw-frame} redisplays the entire contents of a
-given frame. @xref{Frames}.
+given frame (@pxref{Frames}).
@c Emacs 19 feature
@defun redraw-frame frame
to redraw, @code{nil} means redrawing is needed. The default is @code{nil}.
@end defvar
-@node Screen Size
-@section Screen Size
-@cindex size of screen
-@cindex screen size
-@cindex display lines
-@cindex display columns
-@cindex resize redisplay
-
- The screen size functions access or specify the height or width of
-the terminal. When you are using multiple frames, they apply to the
-selected frame (@pxref{Frames}).
-
-@defun screen-height
-This function returns the number of lines on the screen that are
-available for display.
-
-@example
-@group
-(screen-height)
- @result{} 50
-@end group
-@end example
-@end defun
-
-@defun screen-width
-This function returns the number of columns on the screen that are
-available for display.
-
-@example
-@group
-(screen-width)
- @result{} 80
-@end group
-@end example
-@end defun
-
-@defun set-screen-height lines &optional not-actual-size
-This function declares that the terminal can display @var{lines} lines.
-The sizes of existing windows are altered proportionally to fit.
-
-If @var{not-actual-size} is non-@code{nil}, then Emacs displays
-@var{lines} lines of output, but does not change its value for the
-actual height of the screen. (Knowing the correct actual size may be
-necessary for correct cursor positioning.) Using a smaller height than
-the terminal actually implements may be useful to reproduce behavior
-observed on a smaller screen, or if the terminal malfunctions when using
-its whole screen.
-
-If @var{lines} is different from what it was previously, then the
-entire screen is cleared and redisplayed using the new size.
-
-This function returns @code{nil}.
-@end defun
-
-@defun set-screen-width columns &optional not-actual-size
-This function declares that the terminal can display @var{columns}
-columns. The details are as in @code{set-screen-height}.
-@end defun
-
@node Truncation
@section Truncation
@cindex line wrapping
You can override the glyphs that indicate continuation or truncation
using the display table; see @ref{Display Tables}.
- If your buffer contains @strong{very} long lines, and you use
+ If your buffer contains @emph{very} long lines, and you use
continuation to display them, just thinking about them can make Emacs
redisplay slow. The column computation and indentation functions also
become slow. Then you might find it advisable to set
@end example
@end defun
+@defun message-or-box string &rest arguments
+This function displays a message like @code{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
+@code{last-nonmenu-event} (@pxref{Command Loop Info}) is either
+@code{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 @code{y-or-n-p} uses to make a similar decision; see
+@ref{Yes-or-No Queries}.)
+
+You can force use of the mouse or of the echo area by binding
+@code{last-nonmenu-event} to a suitable value around the call.
+@end defun
+
+@defun message-box string &rest arguments
+This function displays a message like @code{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 @code{message-box} uses the echo area, like
+@code{message}.
+@end defun
+
@defun current-message
@tindex current-message
This function returns the message currently being displayed in the
During the search, such overlays are made temporarily visible by
temporarily modifying their invisible and intangible properties. If you
-want this to be done differently for a certain overlays, give it a
+want this to be done differently for a certain overlay, give it an
@code{isearch-open-invisible-temporary} property which is a function.
The function is called with two arguments: the first is the overlay, and
the second is @code{t} to make the overlay visible, or @code{nil} to
@code{t} is used in the last (or only) element of @var{spec}.
@item a list
-If @var{display} is alist, each elements should have the form
+If @var{display} is a list, each element should have the form
@code{(@var{characteristic} @var{value}@dots{})}. Here
@var{characteristic} specifies a way of classifying frames, and the
@var{value}s are possible classifications which @var{display} should
@code{grayscale}, or @code{mono}.
@item background
-The kind of background--- either @code{light} or @code{dark}.
+The kind of background---either @code{light} or @code{dark}.
@end table
If an element of @var{display} specifies more than one @var{value} for a
with the customization buffer, and @code{face-documentation} for the
documentation string.
+@tindex frame-background-mode
+@defopt frame-background-mode
+This option, if non-@code{nil}, specifies the background type to use for
+interpreting face definitions. If it is @code{dark}, then Emacs treats
+all frames as if they had a dark background, regardless of their actual
+background colors. If it is @code{light}, then Emacs treats all frames
+as if they had a light background.
+@end defopt
+
@node Merging Faces
@subsection Merging Faces for Display
Normally, the value is the face number of the face named @code{region}.
@end defvar
+@tindex frame-update-face-colors
+@defun frame-update-face-colors frame
+This function updates the way faces display on @var{frame}, for a change
+in @var{frame}'s foreground or background color.
+@end defun
+
@node Blinking
@section Blinking Parentheses
@cindex parenthesis matching
case nothing is done.
@end defvar
-@defvar blink-matching-paren
+@defopt blink-matching-paren
If this variable is @code{nil}, then @code{blink-matching-open} does
nothing.
-@end defvar
+@end defopt
-@defvar blink-matching-paren-distance
+@defopt blink-matching-paren-distance
This variable specifies the maximum distance to scan for a matching
parenthesis before giving up.
-@end defvar
+@end defopt
-@defvar blink-matching-paren-delay
+@defopt blink-matching-delay
This variable specifies the number of seconds for the cursor to remain
at the matching parenthesis. A fraction of a second often gives
good results, but the default is 1, which works on all systems.
-@end defvar
+@end defopt
-@defun blink-matching-open
+@deffn Command blink-matching-open
This function is the default value of @code{blink-paren-function}. It
assumes that point follows a character with close parenthesis syntax and
moves the cursor momentarily to the matching opening character. If that
(blink-matching-open)))
@end group
@end smallexample
-@end defun
+@end deffn
@node Inverse Video
@section Inverse Video
Here are the possible types of elements in the glyph table:
-@table @var
-@item string
+@table @asis
+@item @var{string}
Send the characters in @var{string} to the terminal to output
this glyph. This alternative is available on character terminals,
but not under a window system.
-@item integer
+@item @var{integer}
Define this glyph code as an alias for glyph code @var{integer}. You
can use an alias to specify a face code for the glyph; see below.
This is a synonym for @code{ding}.
@end defun
-@defvar visible-bell
+@defopt visible-bell
This variable determines whether Emacs should flash the screen to
represent a bell. Non-@code{nil} means yes, @code{nil} means no. This
is effective on a window system, and on a character-only terminal
provided the terminal's Termcap entry defines the visible bell
capability (@samp{vb}).
-@end defvar
+@end defopt
@defvar ring-bell-function
@tindex ring-bell-function
concerned; the individual Emacs windows are not known to X at all.
@defvar window-system
-@cindex X Window System
This variable tells Lisp programs what window system Emacs is running
-under. Its value should be a symbol such as @code{x} (if Emacs is
-running under X) or @code{nil} (if Emacs is running on an ordinary
-terminal).
+under. The possible values are
+
+@table @code
+@item x
+@cindex X Window System
+Emacs is displaying using X.
+@item pc
+Emacs is displaying using MSDOS.
+@item w32
+Emacs is displaying using Windows NT or Windows 95.
+@item nil
+Emacs is using a character-based terminal.
+@end table
@end defvar
@defvar window-setup-hook
HCoop / bpt / emacs.git / blobdiff