MobileRead Forums - View Single Post - MathML fall-back image

KevinH · 02-15-2025, 11:45 AM

I thought about this a bit more and since it was a part of the 3.1 epub spec and so could exist in the wild and because altimg is part of the MathML 2.0 (not yet part of w3c html or epub spec), it would not hurt to detect its use and to update it if the underlying image resource is ever renamed or moved (or if the file using of this attribute moves locations). And of course to detect that image was used by Sigil.

So I have hopefully pushed a change to Sigil master to support that. But since Preview is browser based (and all browsers now support mathml - even chrome) and it also has MathJax3, I have no device to test if this altimg attribute is ever used.

This "fix" will appear in the next release of Sigil.

Thank you for your bug report.

02-15-2025, 11:45 AM	#4
KevinH Sigil Developer Posts: 8,858 Karma: 6120478 Join Date: Nov 2009 Device: many	I thought about this a bit more and since it was a part of the 3.1 epub spec and so could exist in the wild and because altimg is part of the MathML 2.0 (not yet part of w3c html or epub spec), it would not hurt to detect its use and to update it if the underlying image resource is ever renamed or moved (or if the file using of this attribute moves locations). And of course to detect that image was used by Sigil. So I have hopefully pushed a change to Sigil master to support that. But since Preview is browser based (and all browsers now support mathml - even chrome) and it also has MathJax3, I have no device to test if this altimg attribute is ever used. This "fix" will appear in the next release of Sigil. Thank you for your bug report.