> On Nov 4, 2022, at 15:16, Po Lu <luangruo@yahoo.com> wrote:
>
> Kai Ma <justksqsf@gmail.com> writes:
>
>> Iâve narrowed the problem further to [firstRectForCharRange].
>
> I'm either blind, or there is no method by that name...
firstRectForCharacterRange.
>
>> Some calls never return. Activating an input method makes Emacs issue
>> excessive calls to this method. Specifically, the following code gets
>> stuck somewhere.
>>
>> if (WINDOWP (echo_area_window) && ! NILP (call0 (intern
>> ("ns-in-echo-area"))))
>> win = XWINDOW (echo_area_window);
>> else
>> win = XWINDOW (FRAME_SELECTED_WINDOW (emacsframe));
>
> So Emacs completely locks up in that function (ns-in-echo-area)?
Yes and no. Emacs still responds to new key events, but a previous call is
stuck and does not return. Presumably in another thread. To be more clear:
changing that code to be
static int enter_cnt, leave_cnt;
enter_cnt++;
[referenced piece of code]
leave_cnt++;
/* (Or just count the return/leave counts of (ns-in-echo-area).) */
leave_cnt can be less than enter_cnt. Iâve confirmed re-entrance to
[firstRectForCharacterRange] leads to the problem.
Pardon my ignorance, is there any reason to special-case the echo area? Simply
let win = XWINDOW (FRAME_SELECTED_WINDOW (emacsframe)) and the problem is gone.
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