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if event has frame instead.

Don't bounce the cursor if Transient Mark mode.
(mouse-save-then-kill): Pass explicit args to kill-ring-save.
(mouse-kill-ring-save): Likewise.

	name; this doesn't look nice if we use a proportional font.

(event-end, event-start, mouse-movement-p): Moved to subr.el.

	close to the top or bottom of a window, split at the closest
	reasonable line.  Give a helpful error message if the window is
	too small to be split anywhere.
	(mouse-split-window-horizontally): Similar changes.

and don't set the mark.  Replace obsolete fn event-point.
(mouse-kill): Replace obsolete fn event-point.

	(event-window, event-point, mouse-coords, mouse-timestamp):
	Removed.
	(event-start, event-end, posn-window, posn-point, posn-col-row,
	posn-timestamp): New accessors; these are defsubsts.
	(mouse-delete-window, mouse-delete-other-windows,
	mouse-split-window-vertically, mouse-set-point): Rewritten to use
	the new accessors.

	* mouse.el: Remove hack of binding down-mouse-1.

	* mouse.el (mouse-movement-p): Add docstring for this.

(mouse-split-window-horizontally): New command.
Use S-mouse-2 for them.
(mouse-delete-window): Put on mode-line mouse-3.
(mouse-save-then-kill): New command, on mouse-3.
(mouse-delete-other-windows): Use @.  Now on mode-line mouse-1.
(mouse-scroll-down, mouse-scroll-up): Use e, get line from event.
(mouse-scroll-move-cursor): Likewise.
(mouse-scroll-left, mouse-scroll-right): Likewise for column.
(mouse-scroll-move-cursor-horizontally): Likewise.