Re: Should we take CSS into consideration? (was: Re: attribute or CSS property?)

On Mon Dec 15 2014 at 2:11:06 PM Johannes Wilm <johannes@fiduswriter.org>
wrote:

> Hey,
> if we do as proposed, think about this example:
>
> <div style="display:none;">
>   <div contenteditable=true>
>     Hello <span style="display:none">Austria</span>!
>   </div>
> </div>
>
>
> If I understand you right, you want to ignore the outer display:none for
> editing purposes, but respect the inner one?
>

Absolutely not, no. That would be wrong. Any descendant of display:none is
considered to be invisible and treated as such wrt caret movement.

>
> I can see how that may be practical for certain purposes, but correct me
> if I'm wrong, it seems like until now there was only one level something
> could be display:none. Now if we choose to go this route, we will have
> several layers.
>
> We could even go further:
>
> <div style="display:none;">
>   <div contenteditable=true>
>     Hello <span style="display:none"><span
> contenteditable=true>Austria</span></span>!
>   </div>
> </div>
>
>
> Now we would have two (offscreen) contenteditable areas, one within the
> other, but the outer one will ignore the inner one when it comes to caret
> movement, while the inner one is self-contained. I can see how that could
> come in handy for some things.
>

In your example above there is no caret anywhere at all ever because it's
all wrapped in a display:none.

>
> How about CSS specs? It seems at least the definition of display:none
> would need to be amended slightly:
> http://www.w3.org/TR/CSS2/visuren.html#display-prop
>
> "none: This value causes an element to not appear in the formatting
> structure (i.e., in visual media the element generates no boxes and has no
> effect on layout). Descendant elements do not generate any boxes either;
> the element and its content are removed from the formatting structure
> entirely. This behavior cannot be overridden by setting the 'display'
> property on the descendants.
>
> Please note that a display of 'none' does not create an invisible box; it
> creates no box at all. CSS includes mechanisms that enable an element to
> generate boxes in the formatting structure that affect formatting but are
> not visible themselves. Please consult the section on visibility for
> details."
>
> --
> Johannes Wilm
> Fidus Writer
> http://www.fiduswriter.org
>