- From: Glenn Adams <glenn@skynav.com>
- Date: Tue, 16 Jul 2013 17:48:35 -0600
- To: public-tt <public-tt@w3.org>
- Message-ID: <CACQ=j+eq_PkBzKEcz7eN==HJRfy_uh0T5nDyT0czYqQmxmDeHg@mail.gmail.com>
I was reviewing the recently closed ISSUE-257 today, and after further consideration, have determined it was incorrect, and needed to be reverted which I have done in [1]. The basic problem with the previous resolution is that TT Style Attributes are not defined for use on the *tt* element (with the exception of the special case of tts:extent). Furthermore, the outermost Content element [2] used during content style inheritance is the *body* element. Ultimately, there is no element on which tts:fontSize can be specified that doesn't have a parent element. In the case of *body*, if no tts:fontSize is specified, then region style inheritance comes into effect. So that leaves us with a tts:fontSize potentially specified on *region* as the outermost inheritable font size. Accordingly, if the region's font size is specified in percentage, then we do need to resolve it against something other than its parent, since no ancestor of region participates in style inheritance. I will now re-implement a fix for this issue based on the need to resolve percentage on region. [1] https://dvcs.w3.org/hg/ttml/rev/0355e9473d7e [2] https://dvcs.w3.org/hg/ttml/raw-file/default/ttml10/spec/ttaf1-dfxp.html#element-vocab-type-content
Received on Tuesday, 16 July 2013 23:49:23 UTC