On 15-12-07 10:53 AM, Khaled Hosny wrote: > On Mon, Dec 07, 2015 at 09:14:19AM +0100, Behdad Esfahbod wrote: >> On 15-12-05 03:31 PM, Khaled Hosny wrote: >>> Hi, >>> >>> I just noticed that when there is a control character between character >>> that form a ligature, there is a zero width space after the ligature >>> with a cluster value of the first character in the ligature, for >>> example: >>> >>> $ hb-unicode-encode U+0066,U+200C,U+0069 | hb-shape amiri-regular.ttf >>> [f_i=0+1064|space=0+0] >>> >>> or >>> >>> $ hb-unicode-encode U+0066,U+00AD,U+0069 | hb-shape amiri-regular.ttf >>> [f_i=0+1064|space=0+0] >>> >>> This is rather surprising as I was expecting the control character to be >>> consumed inside the ligature and only the ligature glyph would remain. I >>> think the current behaviour makes mapping glyphs to text indices harder >>> in this case. WDYT? >> >> I don't think it makes any difference. It's a zero-width glyph, so it >> contributes nothing to the cluster as a whole, so you still have to divide >> the >> sum of the widths of the glyphs by the number of cursor stops and that works >> the same both ways. No? > > I was thinking in terms of line breaks, since the soft hyphen is a break > opportunity I need to know that the sequence <f><soft hyphen><i> became > the <fi> glyph, but I’m not sure how to do that with the extra glyph > with the same cluster value.
> But may be I’m looking to it from the wrong > angle, ad I simply need to reshape the left side (probably with a real > hyphen) and the right side and just break the line there. Correct. There's no easy way around reshaping. Firefox has a bug open for this. b _______________________________________________ HarfBuzz mailing list HarfBuzz@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/harfbuzz
