Re: mouse-autoselect-window raises frames

[martin rudalics <rudalics@gmx.at>]

 >>>I started to see frames raised while I was just moving my mouse.
 >>>Placing `debug-on-entry' on `raise-frame' showed the problem to be:
 >>>
 >>>Debugger entered--entering a function:
 >>>* raise-frame(#<frame cast.v8 0x8eba878>)
 >>>select-frame-set-input-focus(#<frame cast.v8 0x8eba878>)
 >>>handle-select-window((select-window (#<window 14 on cast.v8>)))
 >>>call-interactively(handle-select-window nil nil)
 >>>
 >>>I think the problem is that handle-select-window shouldn't call
 >>>select-frame-set-input-focus.  It should maybe call x-focus-frame instead.
 >
 >
 >>Would that really be less embarassing?
 >
 >
 > I'm not sure I understand what you mean.

I thought you were embarassed by seeing frames raised and wanted to know
whether you find just focussing frames less embarassing.

 >>What are the values of `mouse-autoselect-window' and `focus-follows-mouse'
 >>on your system?
 >
 >
 > Both, but that's not relevant: handle-select-window should never call
 > "raise-frame".

It calls `select-frame-set-input-focus' and the latter raises the frame.
If you think it shouldn't, let's change `select-frame-set-input-focus'
to do exactly what its name says and look what happens (note that
`x-focus-frame' is not available on Windows installs).

I changed the behavior of mouse-autoselection because people started to
complain about modelines getting highlighted on frames that didn't get
the focus.  When debugging this I found out that I couldn't schedule a
select_window event without also producing a switch_frame event.  Hence
I had to deal somehow with selected frames that did not get the focus.

If you don't want the new behavior you currently can switch-off mouse
autoselection or set `focus-follows-mouse' to nil.  Inherently,
`focus-follows-mouse' should be able to distinguish window management
policies that shift input focus to another frame when the mouse enters
it and policies that addditionally raise the frame whenever the mouse
enters it.  Hence, we could raise the frame in `handle-select-window'
iff `focus-follows-mouse' eqs some value 'raise and x-focus the frame
otherwise (I'm afraid the latter won't make any difference on Windows).
Otherwise, we could consider a new variable `mouse-autoselect-frame' to
customize the behavior of this.