Re: Question about display engine

[Stefan Monnier]

>> IIUC the last one found by face_at_buffer_position that explicitly
>> specified a value for the attribute in question.  That is, the face
>> whose attribute is actually used by the display engine.
>
> Nitpicking: the display engine has no idea whose attributes it is
> using, see below.

I don't know enough of the display engine to say something intelligent,
I'm afraid, but my naive understanding is that the way "it should" work
is that the face used on the "rest of the line" should be computed by
merging the various faces that apply to the corresponding LF character
but where the new `extend-to-end-of-line` property is obeyed
(i.e. a face is skipped if that property is nil).  IOW the
extend-to-end-of-line property is applied *during* merging rather than
after it.

Most likely this can't be mapped to the way things are done, tho.


        Stefan