default 'line' for vertical cues in VTT?

• From: David Singer <singer@apple.com>
• Date: Tue, 22 Jul 2014 16:26:34 -0700
• To: public-texttracks@w3.org
• Message-id: <BC65EDBE-FCFF-47B0-821D-BD5005E7D6A1@apple.com>

For vertical:rl meaning vertical with right to left line progression, is a new cue without a line cue setting at the right of the video area or the left? This would be analogous to horizontal layout having first lines appear at the “bottom” of the screen, bottom here being the opposite of “right”.

Likewise, for vertical:lr, is it left or right?

For horizontal cues where “vertical:” is not specified, the WebVTT spec is clear. It’s at the bottom of the video area.


Item 3 under “A line position” says:

	3. If the text track cue snap-to-lines flag of the text track cue is not set, return the value 100 and abort these steps. (The text track cue line position is the special value auto.)

This might mean bottom for horizontal, leftmost for “vertical:rl” and rightmost for “vertical:lr” but…does it?



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Does anyone have an opinion, fact, existing implementation, cultural knowledge of what’s normal, or anything else relevant?

Thanks




David Singer
Manager, Software Standards, Apple Inc.

Received on Tuesday, 22 July 2014 23:27:13 UTC