@frivoal, I just posted a summary of our discussion last week here: https://github.com/w3c/alreq/issues/86#issuecomment-279963613 > We discussed underline/overline methods on the 7 February 2017 weekly meeting. > > Here's a summary: > > 1) Existing practices (meaning almost any handwriting, lithography, movable type, and traditional word processors) puts underline/overline below/above all glyph parts (letter parts and diacritics). Therefore, this is a desired behavior. > > 2) We will keep looking for other practices and will document when we have good evidence. > > 3) Based on the samples collected, looks like implementations need to find a better way of calculating a position for underline/overline based on font data. Most probably, it will use ascend and descend values for the positioning. > > 4) In any case, if the underline/overline collides with ink, the prefferred default behavior would be to skip the ink. > > 5) When skipping ink, it's also preferred to make sure the underline/overline drawing does NOT form a short pieces, which could be easily mistaken with dots or diacratics. To prevent this, the drawing can be skipped for parts with a short width. -- GitHub Notification of comment by behnam Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/727#issuecomment-279964225 using your GitHub accountReceived on Wednesday, 15 February 2017 09:46:35 UTC
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