Re: [csswg-drafts] [css-text] Should zero width space break Arabic shaping? (#3861)

The text on justification and ZWSP in TUS is on p872, in Volume 23.  I see no difference in behaviour between ZWSP and soft hyphen for justification; if the line-break opportunity is not taken, then both characters are simply ignored; justification behaves as though they were not present.  The issue seems to be mentioned for ZWSP because someone once thought that ZWSP suppressed the expansion of inter-character spacing.

A rendering difference between ZWSP and soft hyphen is that when the line break opportunity is taken, a soft hyphen has hyphenation effects, such as the appearance of a hyphen and changes in spelling.  (Some varieties of Thai use hyphenation with hyphens.)  Another difference is that ZWSP marks a word boundary whereas a soft hyphen has no such effect; this matters for spell checkers. 

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Received on Wednesday, 24 April 2019 01:25:28 UTC