A window configuration records the entire layout of one frame—all windows, their sizes, which buffers they contain, how those buffers are scrolled, and their value of point; also their fringes, margins, and scroll bar settings. It also includes the value of minibuffer-scroll-window. As a special exception, the window configuration does not record the value of point in the selected window for the current buffer.
You can bring back an entire frame layout by restoring a previously saved window configuration. If you want to record the layout of all frames instead of just one, use a frame configuration instead of a window configuration. See Frame Configurations.
This function returns a new object representing frame’s current window configuration. The default for frame is the selected frame. The variable window-persistent-parameters specifies which window parameters (if any) are saved by this function. See Window Parameters.
This function restores the configuration of windows and buffers as specified by configuration, for the frame that configuration was created for.
The argument configuration must be a value that was previously
current-window-configuration. The configuration is
restored in the frame from which configuration was made, whether
that frame is selected or not. This always counts as a window size
change and triggers execution of the window-size-change-functions
(see Window Hooks), because
know how to tell whether the new configuration actually differs from the
If the frame from which configuration was saved is dead, all this
function does is restore the three variables window-min-height,
window-min-width and minibuffer-scroll-window. In this
case, the function returns
nil. Otherwise, it returns t.
Here is a way of using this function to get the same effect
(let ((config (current-window-configuration))) (unwind-protect (progn (split-window-below nil) …) (set-window-configuration config)))
This macro records the window configuration of the selected frame, executes forms in sequence, then restores the earlier window configuration. The return value is the value of the final form in forms.
Most Lisp code should not use this macro;
is typically sufficient. In particular, this macro cannot reliably
prevent the code in forms from opening new windows, because new
windows might be opened in other frames (see Choosing Window), and
save-window-excursion only saves and restores the window
configuration on the current frame.
Do not use this macro in window-size-change-functions; exiting the macro triggers execution of window-size-change-functions, leading to an endless loop.
This function returns t if object is a window configuration.
This function compares two window configurations as regards the structure of windows, but ignores the values of point and the saved scrolling positions—it can return t even if those aspects differ.
equal can also compare two window configurations; it
regards configurations as unequal if they differ in any respect, even a
This function returns the frame for which the window configuration config was made.
Other primitives to look inside of window configurations would make sense, but are not implemented because we did not need them. See the file winner.el for some more operations on windows configurations.
The objects returned by
together with the Emacs process. In order to store a window
configuration on disk and read it back in another Emacs session, you
can use the functions described next. These functions are also useful
to clone the state of a frame into an arbitrary live window
set-window-configuration effectively clones the windows of a
frame into the root window of that very frame only).
window-state-get&optional window writable
This function returns the state of window as a Lisp object. The argument window must be a valid window and defaults to the root window of the selected frame.
If the optional argument writable is non-
nil, this means to
not use markers for sampling positions like
window-start. This argument should be non-
nil when the
state will be written to disk and read back in another session.
Together, the argument writable and the variable window-persistent-parameters specify which window parameters are saved by this function. See Window Parameters.
The value returned by
window-state-get can be used in the same
session to make a clone of a window in another window. It can be also
written to disk and read back in another session. In either case, use
the following function to restore the state of the window.
window-state-putstate &optional window ignore
This function puts the window state state into window.
The argument state should be the state of a window returned by
an earlier invocation of
window-state-get, see above. The
optional argument window can be either a live window or an
internal window (see Windows and Frames) and defaults to the
selected one. If window is not live, it is replaced by a live
window before putting state into it.
If the optional argument ignore is non-
nil, it means to ignore
minimum window sizes and fixed-size restrictions. If ignore
safe, this means windows can get as small as one line
and/or two columns.