bug#10165: [PATCH] Allow setting corner in mouse avoidance mode.

[Thierry Volpiatto <thierry.volpiatto@gmail.com>]

As a reminder, I will have to put back the original behavior in
defcustom, that is to move the mouse by default in the 
top right corner i.e 
(defcustom mouse-avoidance-banish-destination '(right . top)
 
Thierry Volpiatto <thierry.volpiatto@gmail.com> writes:

>> Hi all,
>> there was nothing except modifying function
>> `mouse-avoidance-banish-destination' to set in which corner mouse is
>> banish.
>> This patch allow setting this through
>> `mouse-avoidance-banish-destination' user variable like this:
>> (left . top) or (right . bottom) etc...
>
> Thanks.  We're in feature freeze---please file this in the bug database
> so it doesn't get forgotten.
>
>
> # HG changeset patch
> # User Thierry Volpiatto <thierry.volpiatto@gmail.com>
> # Date 1322632617 -3600
> # Node ID 885228e9f341f392fc6886bf2855a66c5bdba6c5
> # Parent  c511f9c3f7a2cab8b3684b2f1ea4782176988ac6
> * lisp/avoid.el:  Allow setting in which corner banish move the mouse.
> (mouse-avoidance-banish-destination): New user variable, a cons pair to specify banish corner position.
> (mouse-avoidance-banish-destination): Set destination according to mouse-avoidance-banish-destination value.
>
> diff --git a/lisp/avoid.el b/lisp/avoid.el
> --- a/lisp/avoid.el
> +++ b/lisp/avoid.el
> @@ -115,6 +115,11 @@
>    :type 'integer
>    :group 'avoid)
>  
> +(defcustom mouse-avoidance-banish-destination '(left . top)
> +  "Set the position to which Mouse Avoidance mode `banish' moves the mouse."
> +  :group 'avoid
> +  :type 'list)
> +
>  ;; Internal variables
>  (defvar mouse-avoidance-state nil)
>  (defvar mouse-avoidance-pointer-shapes nil)
> @@ -183,10 +188,18 @@
>  
>  (defun mouse-avoidance-banish-destination ()
>    "The position to which Mouse Avoidance mode `banish' moves the mouse.
> -You can redefine this if you want the mouse banished to a different corner."
> -  (let* ((pos (window-edges)))
> -    (cons (- (nth 2 pos) 2)
> -	  (nth 1 pos))))
> +If you want the mouse banished to a different corner set
> +`mouse-avoidance-banish-destination' as you need."
> +  (let* ((pos     (loop for v in (window-edges)
> +                        for k in '(left top right bottom)
> +                        collect (cons k v)))
> +         (side    (car mouse-avoidance-banish-destination))
> +         (up-down (cdr mouse-avoidance-banish-destination))
> +         (fn      (case side
> +                    (left '+)
> +                    (right '-))))
> +    (cons (funcall fn (assoc-default side pos) 2)
> +	  (assoc-default up-down pos))))
>  
>  (defun mouse-avoidance-banish-mouse ()
>    ;; Put the mouse pointer in the upper-right corner of the current frame.

-- 
  Thierry
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