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Re: Obtain X / HPOS with move_it_to at eol when buffer-display-table lin
Re: Obtain X / HPOS with move_it_to at eol when buffer-display-table line-feed
Tue, 29 Aug 2017 17:59:31 +0300
> Date: Tue, 29 Aug 2017 00:01:16 -0700
> From: Keith David Bershatsky <address@hidden>
> I am working on my own feature requests 17684 (thin vertical line) and 22873
> (multiple fake cursors).
> I am having difficulty calculating the X and HPOS using move_it_to when a
> buffer-display-table contains an entry for a line feed (aka \n). I am
> looking for a more eloquent way of of handling this instead of subtracting
> the frame-char-width from it.current.pos, and also subtracting 1 from
> it.current.hpos. We can test the buffer-display-table with something like
> (aref buffer-display-table ?\n), which in my use-case yields [(182 . 127) 10]
> because I also use face to color the eol character.
> We test for a line feed with: FETCH_BYTE (IT_BYTEPOS (it)) == '\n'
> We move to POS using:
> move_it_to (&it, POS, it.last_visible_x, it.last_visible_y - 1, -1,
> MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y);
> Is there a better way to handle this instead of subtracting frame-char-width
> from X and subtracting 1 from HPOS?
I'm sorry, I don't really understand what is it that you are trying to
accomplish. Can you tell more about the goals of this code? Also
what exactly isn't working as you expected?