MobileRead Forums - Preventing chemical symbol from being split by page or line break

MobileRead Forums (https://www.mobileread.com/forums/index.php)

- ePub (https://www.mobileread.com/forums/forumdisplay.php?f=179)

- - Preventing chemical symbol from being split by page or line break (https://www.mobileread.com/forums/showthread.php?t=225312)

Nick Payne

10-22-2013 04:28 AM

Preventing chemical symbol from being split by page or line break

If I have a chemical symbol in an epub (eg H2O, the chemical symbol for water, with the "2" subscripted), I find that it can get broken across a line or page, with the H separated from the 2O. Is there any way to prevent this happening?

jbacelar

10-22-2013 04:41 AM

H&+#8288;2&+#8288;O

Without the +

mrmikel

10-22-2013 08:09 AM

This didn't work in Sigil. Entity 187 did. But I didn't investigate further than that.

DomesticExtremis

10-22-2013 08:58 AM

I'm not sure that's entirely undesirable - suppose
you had the molecular formula for penicilln or something.

But you could try putting the whole thing in a span

Code:

span.nobreak {

page-break-inside: avoid;

}

<span class="nobreak">H<sub>2</sub>O</span>

At_Libitum

10-22-2013 09:03 AM

may also need white-space:nowrap

Toxaris

10-22-2013 11:09 AM

The page-break-inside avoid is ignored by a lot of readers, so it is a bit hit and miss. The reason is the internal HTML tag which is required for the subscript.

white-space: nowrap is also not supported by a lot of readers...

There is no real solution for this. What you might try is creating an SVG with the formula and insert that as image. You can use text in SVG and all readers must support that according to the specifications.

Jellby

10-22-2013 12:24 PM

display:inline-block could help, but it's not required by the epub spec. Maybe display:inline-table

jbacelar

10-22-2013 02:27 PM

Quote:

Originally Posted by mrmikel (Post 2662313)

This didn't work in Sigil.

To me, it works perfectly in Sigil and ADE 1.7, but not in ADE 2. :o

jbacelar

10-23-2013 04:06 AM

That's it! :smack:
Use the character U +2082 (sub-index two)

H₂O

All times are GMT -4. The time now is 06:01 PM.