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visibility since raise-frame does.

select-frame-set-input-focus.

not on the selected frame, raise that window's frame and give it
input focus.  (Bug#745)

is not splittable in last disjunct.  (Bug#888)

scroll-margin instead of scroll-conservatively.

only if the selected window is higher than WINDOW.

Don't use with-selected-window to avoid messing up get-lru-window.

choice nil.
(split-window-preferred-function): Allow either nil or a function.
(window--splittable-p, window--try-to-split-window): Handle
changed option values.
(window--frame-usable-p): Handle nil argument.
(display-buffer): Call get-lru-window when pop-up-windows is nil
and window can't be split.

cannot be split.

(special-display-buffer-names, special-display-regexps)
(special-display-function, same-window-p, same-window-buffer-names)
(same-window-regexps, pop-up-frames, display-buffer-reuse-frames)
(pop-up-frame-function, pop-up-windows)
(split-window-preferred-function, split-height-threshold)
(split-width-threshold, window--splittable-p)
(window--try-to-split-window, window--frame-usable-p)
(even-window-heights, window--even-window-heights)
(window--display-buffer-1, window--display-buffer-2, display-buffer)
(pop-to-buffer): Move from window.c and buffer.c.
(split-window-preferred-horizontally): Remove.
* cus-start.el: Remove corresponding declarations.

* window.c (pop_up_windows, pop_up_frames)
(display_buffer_reuse_frames, Vpop_up_frame_function)
(Vdisplay_buffer_function, Veven_window_heights)
(Vspecial_display_buffer_names, Vspecial_display_regexps)
(Vspecial_display_function, Vsame_window_buffer_names)
(Vsame_window_regexps, split_height_threshold)
(Vsplit_window_preferred_function): Move those vars to window.el.
(display_buffer_1, Fspecial_display_p, Fsame_window_p)
(Fdisplay_buffer): Move those functions to window.el.
(syms_of_window): Remove corresponding declarations.
(display_buffer): New function.
(temp_output_buffer_show, Fother_window_for_scrolling): Use it.
* dispnew.c (Flast_nonminibuf_frame): New function.
* buffer.c (Fpop_to_buffer): Move to window.el.

(bw-balance-sub): Remove unused var `lastchild'.
(split-window-vertically): Remove unused var `switch'.
(recenter-top-bottom): Remove unused vars `bottom', `current', `total'.

(recenter-top-bottom): New command.
(global-map): Bind it to C-l.

change setting the input focus.

change setting the input focus.

select-window or select-frame events.
(handle-select-window): When autoselecting window set input
focus.  Restructure.

(bw-adjust-window): If operation failed, try with a smaller delta.
(window-fixed-size-p): New function.
(window-area-factor): New var.
(balance-windows-area): New command.

to 1 as enlarge-window uses the value to resize/shrink windows other than
WINDOW if needed.

(mouse-autoselect-window-state): New variable.
(mouse-autoselect-window-start, mouse-autoselect-window-cancel)
(mouse-autoselect-window-select, handle-select-window): Rewritten to make
mouse-autoselect-window-timer a one-shot timer.  Suspend delayed autoselection
during menu or popup dialog.

operation would still cause some window to collapse later.

	(mouse-autoselect-window-position)
	(mouse-autoselect-window-window)
	(mouse-autoselect-window-now): New vars.
	(mouse-autoselect-window-cancel)
	(mouse-autoselect-window-select)
	(mouse-autoselect-window-start): New functions.
	(handle-select-window): Call `mouse-autoselect-window-start' when
	delayed window autoselection is enabled.

	* cus-start.el (mouse-autoselect-window): Handle delayed window
	autoselection.

	* emacs-lisp/eldoc.el: Add `handle-select-window' to the set of
	commands after which it is allowed to print in the echo area.