Re: not quite understanding input methods

["Perry E. Metzger" <perry@piermont.com>]

On 8/30/21 15:08, Eli Zaretskii wrote:
>> Date: Mon, 30 Aug 2021 15:00:21 -0400
>> From: "Perry E. Metzger" <perry@piermont.com>
>>
>> Having thought about this, is `read_char` actually going to be called
>> under these circumstances? Remember that I've bound "<f19>" to a
>> function that inserts a character into the buffer, and it is that
>> character in the buffer that is in the quail rule. I may be confused
>> about how all of this works, of course.
> Before a key sequence bound to a command causes that command to be
> invoked, it (the key sequence) must be read, and that's the job of
> read_char.  Only after F19 is read, Emacs calls the command to which
> you bound it, and that command inserts a character into the buffer.
>
Yes, but the point at which the character that's inserted into the 
buffer is present is after the Quail input method was invoked by 
read_char. Again, I'm finding the stack of things involved in the input 
method getting invoked rather difficult to follow, but it feels like 
Quail doesn't actually look backwards in the buffer and thus could care 
less that I inserted a particular character there. That said, I don't 
truly get how all this works yet, there's no documentation and a heap of 
twisty code involved.


Perry