Bug 118418 - Scrolling API?

[Caolán McNamara]

On Mon, 2019-12-16 at 13:10 +0100, Martin Pieuchot wrote:
> I'm looking for help/explanation about the coordinate system and
> scrolling API to use in `SwAccessibleParagraph'.
> 
> I'm currently working on bug #118418 [1], trying to implement
> scrollSubstringTo() and scrollSubstringToPoint() like I did for
> gtk [2] and evince [3].
> 
> The diff below clearly shows that I don't know how to translate a
> character index to coordinates that can be feed to Window's Scroll().
> 
> So here are my questions:
> 
> - Is calling getWindow()'s Scroll() the correct way to realize the
>   scrolling.  If so, the code below doesn't correctly refresh all the
>   text, so what am I missing?
> 
> - What API should I use to convert the coordinates?

I don't know for sure the correct answer, but I feel that for writer
ScrollMDI might be your friend here and that the code should look
something like the attached SwAccessibleParagraph::scrollToPosition
demo. I haven't tested or checked further if its the right approach but
maybe that helps.
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