@c Copyright (C) 1990-1995, 1998-1999, 2001-2012
@c Free Software Foundation, Inc.
@c See the file elisp.texi for copying conditions.
-@setfilename ../../info/windows
@node Windows, Frames, Buffers, Top
@chapter Windows
@section Basic Concepts of Emacs Windows
@cindex window
-A @dfn{window} is a area of the screen which is used to display a
+A @dfn{window} is a area of the screen that is used to display a
buffer (@pxref{Buffers}). In Emacs Lisp, windows are represented by a
special Lisp object type.
graphical desktop environments and window systems, such as the X
Window System. When Emacs is run on X, each of its graphical X
windows is an Emacs frame (containing one or more Emacs windows).
-When Emacs is run on a text-only terminal, the frame fills the entire
+When Emacs is run on a text terminal, the frame fills the entire
terminal screen.
@cindex tiled windows
The functions @code{window-next-sibling} and
@code{window-prev-sibling} should not be confused with the functions
-@code{next-window} and @code{previous-window} which respectively
-return the next and previous window in the cyclic ordering of windows
+@code{next-window} and @code{previous-window}, which return the next
+and previous window, respectively, in the cyclic ordering of windows
(@pxref{Cyclic Window Ordering}).
You can use the following functions to find the first live window on
Emacs provides several functions for finding the height and width of
a window. Except where noted, Emacs reports window heights and widths
-as integer numbers of lines and columns respectively. On a graphical
+as integer numbers of lines and columns, respectively. On a graphical
display, each ``line'' and ``column'' actually corresponds to the
height and width of a ``default'' character specified by the frame's
default font. Thus, if a window is displaying text with a different
@end defun
For compatibility with previous versions of Emacs,
-@code{window-height} is an alias for @code{window-body-height}, and
+@code{window-height} is an alias for @code{window-total-height}, and
@code{window-width} is an alias for @code{window-body-width}. These
aliases are considered obsolete and will be removed in the future.
The optional argument @var{max-height}, if non-@code{nil}, specifies
the maximum total height that this function can give @var{window}.
-The optional argument @var{min-height}, if no-@code{nil}, specifies
+The optional argument @var{min-height}, if non-@code{nil}, specifies
the minimum total height that it can give, which overrides the
variable @code{window-min-height}.
The behavior of this function may be altered by the window parameters
of @var{window}, so long as the variable
-@code{ignore-window-parameters} is non-@code{nil}. If the value of
+@code{ignore-window-parameters} is @code{nil}. If the value of
the @code{split-window} window parameter is @code{t}, this function
ignores all other window parameters. Otherwise, if the value of the
@code{split-window} window parameter is a function, that function is
The behavior of this function may be altered by the window parameters
of @var{window}, so long as the variable
-@code{ignore-window-parameters} is non-@code{nil}. If the value of
+@code{ignore-window-parameters} is @code{nil}. If the value of
the @code{delete-window} window parameter is @code{t}, this function
ignores all other window parameters. Otherwise, if the value of the
@code{delete-window} window parameter is a function, that function is
The behavior of this function may be altered by the window parameters
of @var{window}, so long as the variable
-@code{ignore-window-parameters} is non-@code{nil}. If the value of
+@code{ignore-window-parameters} is @code{nil}. If the value of
the @code{delete-other-windows} window parameter is @code{t}, this
function ignores all other window parameters. Otherwise, if the value
of the @code{delete-other-windows} window parameter is a function,
Note that this argument does not have the same meaning as in other
functions which scan all live windows (@pxref{Cyclic Window
-Ordering}). Specifically, the values @code{t} and @code{nil} have the
-opposite of their meanings in those other functions.
+Ordering}). Specifically, the meanings of @code{t} and @code{nil} here
+are the opposite of what they are in those other functions.
@end deffn
@node Selecting Windows
This macro selects @var{window}, executes @var{forms} in sequence, then
restores the previously selected window and current buffer. The ordering
of recently selected windows and the buffer list remain unchanged unless
-you deliberately change them within @var{forms}, for example, by calling
+you deliberately change them within @var{forms}; for example, by calling
@code{select-window} with argument @var{norecord} @code{nil}.
-The order of recently selected windows and the buffer list are not
-changed by this macro.
+This macro does not change the order of recently selected windows or
+the buffer list.
@end defmac
@defun frame-selected-window &optional frame
@end defun
@defun set-frame-selected-window frame window &optional norecord
-This function makes @code{window} the window selected within the frame
+This function makes @var{window} the window selected within the frame
@var{frame}. @var{frame} should be a live frame; if omitted or
@code{nil}, it defaults to the selected frame. @var{window} should be
a live window; if omitted or @code{nil}, it defaults to the selected
if omitted or @code{nil}, it defaults to the selected window.
The optional argument @var{minibuf} specifies whether minibuffer windows
-shall be included in the cyclic ordering. Normally, when @var{minibuf}
+should be included in the cyclic ordering. Normally, when @var{minibuf}
is @code{nil}, a minibuffer window is included only if it is currently
``active''; this matches the behavior of @kbd{C-x o}. (Note that a
minibuffer window is active as long as its minibuffer is in use; see
@end defopt
@defun split-window-sensibly window
-This function tries to split @code{window}, and return the newly
-created window. If @code{window} cannot be split, it returns
+This function tries to split @var{window}, and return the newly
+created window. If @var{window} cannot be split, it returns
@code{nil}.
This function obeys the usual rules that determine when a window may
be split (@pxref{Splitting Windows}). It first tries to split by
placing the new window below, subject to the restriction imposed by
-@code{split-height-threshold} (see below) in addition to any other
+@code{split-height-threshold} (see below), in addition to any other
restrictions. If that fails, it tries to split by placing the new
window to the right, subject to @code{split-width-threshold} (see
below). If that fails, and the window is the only window on its
If @var{args} is an alist, it specifies frame parameters for the new
frame. If @var{args} is a list whose @sc{car} is a symbol, then
-@code{(car @var{args})} is called as a function to actually create and
+@code{(car @var{args})} is a function to actually create and
set up the frame; it is called with @var{buffer} as first argument, and
@code{(cdr @var{args})} as additional arguments.
@defopt same-window-buffer-names
A list of buffer names for buffers that should be displayed in the
-selected window. If the buffer's name is in this list,
+selected window. If a buffer's name is in this list,
@code{display-buffer} handles the buffer by switching to it in the
selected window.
@end defopt
@section Window History
@cindex window history
-Each window remembers the buffers it has displayed earlier and the order
-in which these buffers have been removed from it. This history is used,
+Each window remembers the buffers it has previously displayed, and the order
+in which these buffers were removed from it. This history is used,
for example, by @code{replace-buffer-in-windows} (@pxref{Buffers and
Windows}). This list is automatically maintained by Emacs, but you can
use the following functions to explicitly inspect or alter it:
argument @var{window} should be a live window or @code{nil} (meaning
the selected window). If the optional argument @var{bury-or-kill} is
non-@code{nil}, this means that the buffer currently shown in
-@var{window} is about to be buried or killed and consequently shall
+@var{window} is about to be buried or killed and consequently should
not be switched to in future invocations of this command.
The previous buffer is usually the buffer shown before the buffer
currently shown in @var{window}. However, a buffer that has been buried
-or killed or has been already shown by a recent invocation of
-@code{switch-to-prev-buffer} does not qualify as previous buffer.
+or killed, or has been already shown by a recent invocation of
+@code{switch-to-prev-buffer}, does not qualify as previous buffer.
If repeated invocations of this command have already shown all buffers
previously shown in @var{window}, further invocations will show buffers
from the buffer list of the frame @var{window} appears on (@pxref{The
-Buffer List}).
+Buffer List}), trying to skip buffers that are already shown in another
+window on that frame.
@end deffn
@deffn Command switch-to-next-buffer &optional window
-This command switches to the next buffer in @var{window} thus undoing
+This command switches to the next buffer in @var{window}, thus undoing
the effect of the last @code{switch-to-prev-buffer} command in
@var{window}. The argument @var{window} must be a live window and
defaults to the selected one.
-If there is no recent invocation of a @code{switch-to-prev-buffer} that
+If there is no recent invocation of @code{switch-to-prev-buffer} that
can be undone, this function tries to show a buffer from the buffer list
of the frame @var{window} appears on (@pxref{The Buffer List}).
@end deffn
+By default @code{switch-to-prev-buffer} and @code{switch-to-next-buffer}
+can switch to a buffer that is already shown in another window on the
+same frame. The following option can be used to override this behavior.
+
+@defopt switch-to-visible-buffer
+If this variable is non-@code{nil}, @code{switch-to-prev-buffer} and
+@code{switch-to-next-buffer} may switch to a buffer that is already
+visible on the same frame, provided the buffer was shown in the relevant
+window before. If it is @code{nil}, @code{switch-to-prev-buffer} and
+@code{switch-to-next-buffer} always try to avoid switching to a buffer
+that is already visible in another window on the same frame.
+@end defopt
+
@node Dedicated Windows
@section Dedicated Windows
This function returns non-@code{nil} if @var{window} is dedicated to its
buffer and @code{nil} otherwise. More precisely, the return value is
the value assigned by the last call of @code{set-window-dedicated-p} for
-@var{window} or @code{nil} if that function was never called with
+@var{window}, or @code{nil} if that function was never called with
@var{window} as its argument. The default for @var{window} is the
selected window.
@end defun
@node Quitting Windows
@section Quitting Windows
-When you want to get rid of a window used for displaying a buffer you
+When you want to get rid of a window used for displaying a buffer, you
can call @code{delete-window} or @code{delete-windows-on}
(@pxref{Deleting Windows}) to remove that window from its frame. If the
buffer is shown on a separate frame, you might want to call
@code{delete-frame} (@pxref{Deleting Frames}) instead. If, on the other
hand, a window has been reused for displaying the buffer, you might
-prefer showing the buffer previously shown in that window by calling the
+prefer showing the buffer previously shown in that window, by calling the
function @code{switch-to-prev-buffer} (@pxref{Window History}).
Finally, you might want to either bury (@pxref{The Buffer List}) or kill
(@pxref{Killing Buffers}) the window's buffer.
The following function uses information on how the window for
-displaying the buffer was obtained in the first place thus attempting to
-automatize the above decisions for you.
+displaying the buffer was obtained in the first place, thus attempting to
+automate the above decisions for you.
@deffn Command quit-window &optional kill window
This command quits @var{window} and buries its buffer. The argument
The three cases described so far require that the buffer shown in
@var{window} is still the buffer displayed by the last buffer display
function for this window. If another buffer has been shown in the
-meantime or the buffer previously shown no longer exists, this command
+meantime, or the buffer previously shown no longer exists, this command
calls @code{switch-to-prev-buffer} (@pxref{Window History}) to show some
other buffer instead.
@end deffn
The function @code{quit-window} bases its decisions on information
stored in @var{window}'s @code{quit-restore} window parameter
-(@pxref{Window Parameters}) and resets that parameter to @code{nil}
+(@pxref{Window Parameters}), and resets that parameter to @code{nil}
after it's done.
The following option specifies how to deal with a frame containing just
-one window that shall be either quit or whose buffer shall be buried.
+one window that should be either quit, or whose buffer should be buried.
@defopt frame-auto-hide-function
The function specified by this option is called to automatically hide
-frames. This function is called with one argument - a frame.
+frames. This function is called with one argument---a frame.
The function specified here is called by @code{bury-buffer} (@pxref{The
Buffer List}) when the selected window is dedicated and shows the buffer
-that shall be buried. It is also called by @code{quit-window} (see
-above) when the frame of the window that shall be quit has been
+that should be buried. It is also called by @code{quit-window} (see
+above) when the frame of the window that should be quit has been
specially created for displaying that window's buffer and the buffer
-shall be buried.
+should be buried.
The default is to call @code{iconify-frame} (@pxref{Visibility of
-Frames}). Alternatively, you may either specify @code{delete-frame}
+Frames}). Alternatively, you may specify either @code{delete-frame}
(@pxref{Deleting Frames}) to remove the frame from its display,
@code{ignore} to leave the frame unchanged, or any other function that
can take a frame as its sole argument.
Note that the function specified by this option is called if and only if
-there's at least one other frame on the terminal of the frame it's
-supposed to handle and that frame contains only one live window.
+there is at least one other frame on the terminal of the frame it's
+supposed to handle, and that frame contains only one live window.
@end defopt
@cindex window top line
This function returns the display-start position of window
@var{window}. If @var{window} is @code{nil}, the selected window is
-used. For example,
-
-@example
-@group
-(window-start)
- @result{} 7058
-@end group
-@end example
+used.
When you create a window, or display a different buffer in it, the
display-start position is set to a display-start position recently used
on the screen. Nothing except redisplay automatically changes the
window-start position; if you move point, do not expect the window-start
position to change in response until after the next redisplay.
-
-For a realistic example of using @code{window-start}, see the
-description of @code{count-lines}. @xref{Definition of count-lines}.
@end defun
@cindex window end position
middle of a buffer and repeatedly call @code{scroll-down}, you will
eventually see the beginning of the buffer.
- Some people have urged that the opposite convention be used: they
+ Unfortunately, this sometimes causes confusion, because some people
+tend to think in terms of the opposite convention: they
imagine the window moving over text that remains in place, so that
``down'' commands take you to the end of the buffer. This convention
is consistent with fact that such a command is bound to a key named
-@key{PageDown} on modern keyboards. We have not switched to this
-convention as that is likely to break existing Emacs Lisp code.
+@key{PageDown} on modern keyboards.
+@ignore
+We have not switched to this convention as that is likely to break
+existing Emacs Lisp code.
+@end ignore
Textual scrolling functions (aside from @code{scroll-other-window})
have unpredictable results if the current buffer is not the one
This function scrolls backward by @var{count} lines in the selected
window.
-If @var{count} is negative, it scrolls forward instead. If
-@var{count} is omitted or @code{nil}, the distance scrolled is
-@code{next-screen-context-lines} lines less than the height of the
-window's text area.
-
-If the selected window cannot be scrolled any further, this function
-signals an error. Otherwise, it returns @code{nil}.
+If @var{count} is negative, it scrolls forward instead. In other
+respects, it behaves the same way as @code{scroll-up} does.
@end deffn
@deffn Command scroll-up-command &optional count
window.
When the selected window is the minibuffer, the next window is normally
-the one at the top left corner. You can specify a different window to
-scroll, when the minibuffer is selected, by setting the variable
+the leftmost one immediately above it. You can specify a different
+window to scroll, when the minibuffer is selected, by setting the variable
@code{minibuffer-scroll-window}. This variable has no effect when any
other window is selected. When it is non-@code{nil} and the
minibuffer is selected, it takes precedence over
@code{scroll-other-window} attempts to scroll the minibuffer. If the
minibuffer contains just one line, it has nowhere to scroll to, so the
line reappears after the echo area momentarily displays the message
-@samp{Beginning of buffer}.
+@samp{End of buffer}.
@end deffn
@defvar other-window-scroll-buffer
point @var{count} lines down from the top of the window. If
@var{count} is a negative number, then it counts upward from the
bottom of the window, so that @minus{}1 stands for the last usable
-line in the window. If @var{count} is a non-@code{nil} list, then it
-stands for the line in the middle of the window.
+line in the window.
-If @var{count} is @code{nil}, @code{recenter} puts the line containing
-point in the middle of the window, then clears and redisplays the entire
-selected frame.
+If @var{count} is @code{nil} (or a non-@code{nil} list),
+@code{recenter} puts the line containing point in the middle of the
+window. If @var{count} is @code{nil}, this function may redraw the
+frame, according to the value of @code{recenter-redisplay}.
When @code{recenter} is called interactively, @var{count} is the raw
prefix argument. Thus, typing @kbd{C-u} as the prefix sets the
top.
With an argument of zero, @code{recenter} positions the current line at
-the top of the window. This action is so handy that some people make a
-separate key binding to do this. For example,
+the top of the window. The command @code{recenter-top-bottom} offers
+a more convenient way to achieve this.
+@end deffn
-@example
-@group
-(defun line-to-top-of-window ()
- "Scroll current line to top of window.
-Replaces three keystroke sequence C-u 0 C-l."
- (interactive)
- (recenter 0))
+@defopt recenter-redisplay
+If this variable is non-@code{nil}, calling @code{recenter} with a
+@code{nil} argument redraws the frame. The default value is
+@code{tty}, which means only redraw the frame if it is a tty frame.
+@end defopt
-(global-set-key [kp-multiply] 'line-to-top-of-window)
-@end group
-@end example
+@deffn Command recenter-top-bottom &optional count
+This command, which is the default binding for @kbd{C-l}, acts like
+@code{recenter}, except if called with no argument. In that case,
+successive calls place point according to the cycling order defined
+by the variable @code{recenter-positions}.
@end deffn
+@defopt recenter-positions
+This variable controls how @code{recenter-top-bottom} behaves when
+called with no argument. The default value is @code{(middle top
+bottom)}, which means that successive calls of
+@code{recenter-top-bottom} with no argument cycle between placing
+point at the middle, top, and bottom of the window.
+@end defopt
+
+
@node Vertical Scrolling
@section Vertical Fractional Scrolling
@cindex vertical fractional scrolling
disappear off to the left depends on their width, and could vary from
line to line.
- Because we read from side to side in the ``inner loop,'' and from top
-to bottom in the ``outer loop,'' the effect of horizontal scrolling is
+ Because we read from side to side in the ``inner loop'', and from top
+to bottom in the ``outer loop'', the effect of horizontal scrolling is
not like that of textual or vertical scrolling. Textual scrolling
involves selection of a portion of text to display, and vertical
scrolling moves the window contents contiguously; but horizontal
Note that these are the actual outer edges of the window, including
any header line, mode line, scroll bar, fringes, and display margins.
-On a text-only terminal, if the window has a neighbor on its right,
-its right edge includes the separator line between the window and its
+On a text terminal, if the window has a neighbor on its right, its
+right edge includes the separator line between the window and its
neighbor.
@end defun
@defun coordinates-in-window-p coordinates window
This function checks whether a window @var{window} occupies the
-frame-relative coordinates @var{coordinates}, and if so which part of
+frame-relative coordinates @var{coordinates}, and if so, which part of
the window that is. @var{window} should be a live window.
@var{coordinates} should be a cons cell of the form @code{(@var{x}
. @var{y})}, where @var{x} and @var{y} are frame-relative coordinates.
The following functions return window positions in pixels, rather
than character units. Though mostly useful on graphical displays,
-they can also be called on text-only terminals, where the screen area
-of each text character is taken to be ``one pixel''.
+they can also be called on text terminals, where the screen area of
+each text character is taken to be ``one pixel''.
@defun window-pixel-edges &optional window
This function returns a list of pixel coordinates for the edges of
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 @ref{Frame Configurations}.
+window configuration. @xref{Frame Configurations}.
@defun current-window-configuration &optional frame
This function returns a new object representing @var{frame}'s current
window configuration. The default for @var{frame} is the selected
frame. The variable @code{window-persistent-parameters} specifies
-whether and which window parameters are saved by this function, see
-@ref{Window Parameters} for details.
+which window parameters (if any) are saved by this function.
+@xref{Window Parameters}.
@end defun
@defun set-window-configuration configuration
know how to tell whether the new configuration actually differs from the
old one.
-If the frame which @var{configuration} was saved from is dead, all this
+If the frame from which @var{configuration} was saved is dead, all this
function does is restore the three variables @code{window-min-height},
-@code{window-min-width} and @code{minibuffer-scroll-window}. In this
+@code{window-min-width} and @code{minibuffer-scroll-window}. In this
case, the function returns @code{nil}. Otherwise, it returns @code{t}.
Here is a way of using this function to get the same effect
@end example
@end defun
-@defspec save-window-excursion forms@dots{}
+@defmac save-window-excursion forms@dots{}
This special form records the window configuration, executes @var{forms}
in sequence, then restores the earlier window configuration. The window
configuration includes, for each window, the value of point and the
;; @r{The screen is now split again.}
@end group
@end example
-@end defspec
+@end defmac
@defun window-configuration-p object
This function returns @code{t} if @var{object} is a window configuration.
The objects returned by @code{current-window-configuration} die
together with the Emacs process. In order to store a window
-configuration on disk and read it back in another Emacs session, the
-functions described next can be used. These functions are also useful
+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
(@code{set-window-configuration} effectively clones the windows of a
frame into the root window of that very frame only).
If the optional argument @var{writable} is non-@code{nil}, this means to
not use markers for sampling positions like @code{window-point} or
@code{window-start}. This argument should be non-@code{nil} when the
-state shall be written to disk and read back in another session.
+state will be written to disk and read back in another session.
Together, the argument @var{writable} and the variable
@code{window-persistent-parameters} specify which window parameters are
-saved by this function, see @ref{Window Parameters} for details.
+saved by this function. @xref{Window Parameters}.
@end defun
The value returned by @code{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 function described next to restore the state of the window.
+the following function to restore the state of the window.
@defun window-state-put state &optional window ignore
This function puts the window state @var{state} into @var{window}. The
argument @var{window} must specify a live window and defaults to the
selected one.
-The optional argument @var{ignore} non-@code{nil} means to ignore
-minimum window sizes and fixed size restrictions. If @var{ignore}
-equals @code{safe}, this means windows can get as small as one line
+If the optional argument @var{ignore} is non-@code{nil}, it means to ignore
+minimum window sizes and fixed-size restrictions. If @var{ignore}
+is @code{safe}, this means windows can get as small as one line
and/or two columns.
@end defun
@defun window-parameters &optional window
This function returns all parameters of @var{window} and their values.
-The default for @var{window} is the selected window. The return value,
-if non-@code{nil} is an association list whose elements have the form
+The default for @var{window} is the selected window. The return value
+is either @code{nil}, or an association list whose elements have the form
@code{(@var{parameter} . @var{value})}.
@end defun
is the selected window.
@end defun
-By default, functions saving and restoring window configurations or the
+By default, the functions that save and restore window configurations or the
states of windows (@pxref{Window Configurations}) do not care about
-window parameters. This means, that when you change the value of a
+window parameters. This means that when you change the value of a
parameter within the body of a @code{save-window-excursion}, the
-previous value is not restored upon exit of that macro. It also means
+previous value is not restored when that macro exits. It also means
that when you restore via @code{window-state-put} a window state saved
earlier by @code{window-state-get}, all cloned windows have their
-parameters reset to @code{nil}. The following variable allows to
-override the standard behavior.
+parameters reset to @code{nil}. The following variable allows you to
+override the standard behavior:
@defvar window-persistent-parameters
This variable is an alist specifying which parameters get saved by
-@code{current-window-configuration} and @code{window-state-get} and
+@code{current-window-configuration} and @code{window-state-get}, and
subsequently restored by @code{set-window-configuration} and
-@code{window-state-put}, see @ref{Window Configurations}.
+@code{window-state-put}. @xref{Window Configurations}.
-The @sc{car} of each entry of this alist is the symbol specifying the
+The @sc{car} of each entry of this alist is a symbol specifying the
parameter. The @sc{cdr} should be one of the following:
@table @asis
@item @code{nil}
-This value means the parameter is neither saved by
+This value means the parameter is saved neither by
@code{window-state-get} nor by @code{current-window-configuration}.
@item @code{t}
This value specifies that the parameter is saved by
-@code{current-window-configuration} and, provided its @var{writable}
-argument is @code{nil}, by @code{window-state-get}.
+@code{current-window-configuration} and (provided its @var{writable}
+argument is @code{nil}) by @code{window-state-get}.
@item @code{writable}
This means that the parameter is saved unconditionally by both
@end table
@end defvar
-Some functions, notably @code{delete-window},
-@code{delete-other-windows} and @code{split-window} may behave specially
+Some functions (notably @code{delete-window},
+@code{delete-other-windows} and @code{split-window}), may behave specially
when their @var{window} argument has a parameter set. You can override
such special behavior by binding the following variable to a
non-@code{nil} value:
@defvar ignore-window-parameters
If this variable is non-@code{nil}, some standard functions do not
process window parameters. The functions currently affected by this are
-@code{split-window}, @code{delete-window}, @code{delete-other-windows}
+@code{split-window}, @code{delete-window}, @code{delete-other-windows},
and @code{other-window}.
An application can bind this variable to a non-@code{nil} value around
(@pxref{Cyclic Window Ordering}).
@item @code{clone-of}
-This parameter specifies the window this one has been cloned from and is
-installed by @code{window-state-get}, see @ref{Window Configurations}.
+This parameter specifies the window that this one has been cloned
+from. It is installed by @code{window-state-get} (@pxref{Window
+Configurations}).
@item @code{quit-restore}
-This parameter tells how to proceed with a window when the buffer it
-shows is no more needed. It is installed by the buffer display
-functions (@pxref{Choosing Window}) and consulted by the function
+This parameter specifies what to do with a window when the buffer it
+shows is not needed any more. It is installed by the buffer display
+functions (@pxref{Choosing Window}), and consulted by the function
@code{quit-window} (@pxref{Quitting Windows}).
@end table
-In addition, the parameters @code{window-atom} and @code{window-side}
-are reserved and should not be used by applications.
+There are additional parameters @code{window-atom} and @code{window-side};
+these are reserved and should not be used by applications.
@node Window Hooks
This variable is not a normal hook, because each function is called with
two arguments: the window, and its new display-start position.
-These functions must be careful in using @code{window-end}
+These functions must take care when using @code{window-end}
(@pxref{Window Start and End}); if you need an up-to-date value, you
must use the @var{update} argument to ensure you get it.
changing the sizes of windows, or displaying a different buffer in a
window.
-The buffer-local part of this hook is run once per each window on the
+The buffer-local part of this hook is run once for each window on the
affected frame, with the relevant window selected and its buffer
current. The global part is run once for the modified frame, with that
frame selected.
HCoop / bpt / emacs.git / blobdiff