120164 2013-08-22 11:04:44 -0700 Implement negative width for mspace 2013-12-17 15:54:01 -0800 1 1 1 Unclassified WebKit MathML 528+ (Nightly build) All All NEW P2 Normal --- 124841 115583 1 fred.wang webkit-unassigned bfulgham cfleizach darin gur.trio zalan oldest_to_newest 919920 0 209380 fred.wang 2013-08-22 11:04:44 -0700 Created attachment 209380 Experimental Patch Just opening this bug for the record and attaching an old experimental patch if someone wants to work on this. IIRC, one problem with that patch is that it caused an assert to be raised in the flexbox code. I also tried a simpler version that just removed if (m_width < 0) { m_width = 0; } and I think this gave similar results. Both methods provided the expected rendering for the added reftests. One case that is not included in the tests is negative space in table cells: ... <mtd> <mspace width="2em" height="1em" mathbackground="red"></mspace> <mspace width="-1em"/> <mspace width="1em" height="1em" mathbackground="blue"></mspace> </mtd> ... that can't work because <mtd> has not a flexbox display but a table-cell display. I think the solution will be to add an anonymous flexbox as a child of the mtd element. 209380 2013-08-22 11:04:44 -0700 2013-08-22 11:04:44 -0700 Experimental Patch mspace-neg.diff text/plain 11071 fred.wang ZGlmZiAtLWdpdCBhL0xheW91dFRlc3RzL21hdGhtbC9wcmVzZW50YXRpb24vbXNwYWNlLW5lZ2F0 aXZlLXdpZHRoLWV4cGVjdGVkLmh0bWwgYi9MYXlvdXRUZXN0cy9tYXRobWwvcHJlc2VudGF0aW9u L21zcGFjZS1uZWdhdGl2ZS13aWR0aC1leHBlY3RlZC5odG1sCm5ldyBmaWxlIG1vZGUgMTAwNjQ0 CmluZGV4IDAwMDAwMDAuLmI2MDA2OGQKLS0tIC9kZXYvbnVsbAorKysgYi9MYXlvdXRUZXN0cy9t YXRobWwvcHJlc2VudGF0aW9uL21zcGFjZS1uZWdhdGl2ZS13aWR0aC1leHBlY3RlZC5odG1sCkBA IC0wLDAgKzEsNzkgQEAKKzwhZG9jdHlwZSBodG1sPgorPGh0bWw+CisgIDxoZWFkPgorICAgIDx0 aXRsZT5uZWdhdGl2ZSBtc3BhY2U8L3RpdGxlPgorICAgIDxtZXRhIGNoYXJzZXQ9InV0Zi04Ii8+ CisgIDwvaGVhZD4KKyAgPGJvZHk+CisgICAgPCEtLSBOZWdhdGl2ZSBzcGFjZSBpbiBhIDxtYXRo PiBlbGVtZW50LiAtLT4KKyAgICA8dGFibGU+CisgICAgICA8dHI+CisgICAgICAgIDx0ZCBzdHls ZT0iYm9yZGVyOiAxcHggc29saWQgYmxhY2siPgorICAgICAgICAgIDxtYXRoPgorICAgICAgICAg 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