160075 2016-07-21 23:52:44 -0700 Support for multiple alignment values for tabular columnalign and rowalign attributes 2016-07-21 23:52:44 -0700 1 1 1 Unclassified WebKit MathML WebKit Nightly Build All All NEW https://www.w3.org/TR/MathML/chapter3.html#presm.tabmat P2 Normal --- 1 fred.wang webkit-unassigned alex distler rego oldest_to_newest 1213505 0 284310 fred.wang 2016-07-21 23:52:44 -0700 Created attachment 284310 Testcase columnalign Our columnalign and rowalign support currently relies on the following CSS rules: /* Use inline-block for children so that the text-align property is taken into account */ mtd > * { display: inline-block; } mtable[columnalign="left"], mtr[columnalign="left"], mtd[columnalign="left"] { text-align: left; } mtable[columnalign="right"], mtr[columnalign="right"], mtd[columnalign="right"] { text-align: right; } mtable[rowalign="top"] mtd, mtable mtr[rowalign="top"] mtd, mtable mtr mtd[rowalign="top"] { vertical-align: top; } mtable[rowalign="bottom"] mtd, mtable mtr[rowalign="bottom"] mtd, mtable mtr mtd[rowalign="bottom"] { vertical-align: bottom; } mtable[rowalign="center"] mtd, mtable mtr[rowalign="center"] mtd, mtable mtr mtd[rowalign="center"] { vertical-align: middle; } These only handle the basic cases. MathML tables are closer to LaTeX than to HTML and allows multiple alignment rules to be specified in a single attribute. I'm attaching a testcase from Mozilla's testsuite demonstrating the issue. More can be found at https://dxr.mozilla.org/mozilla-central/source/layout/reftests/mathml/ I think the case of columnalign is particularly important for aligned equations. I noticed it on Wikipedia and Jacques Distler reported the issue too for itex2MML/Instiki. 284310 2016-07-21 23:52:44 -0700 2016-07-21 23:52:44 -0700 Testcase columnalign mtable-columnalign.html text/html 5573 fred.wang PCFET0NUWVBFIGh0bWw+CjxodG1sPgogIDxoZWFkPgogICAgPHRpdGxlPlRlc3QgTWF0aE1MIGNv bHVtbmFsaWduPC90aXRsZT4KICA8L2hlYWQ+CiAgPGJvZHk+CiAgICA8Yj5jb2x1bW5hbGlnbj0i bGVmdCI8L2I+IDxiciAvPgogICAgPG1hdGg+CiAgICAgIDxtc3R5bGU+CiAgICAgICAgPG10YWJs ZSBjb2x1bW5hbGlnbj0ibGVmdCI+CiAgICAgICAgICA8bXRyPgogICAgICAgICAgICA8bXRkPgog ICAgICAgICAgICAgIDxtdGV4dD4xMjM8L210ZXh0PgogICAgICAgICAgICA8L210ZD4KICAgICAg ICAgICAgPG10ZD4KICAgICAgICAgICAgICA8bXRleHQ+MTIzPC9tdGV4dD4KICAgICAgICAgICAg PC9tdGQ+CiAgICAgICAgICAgIDxtdGQ+CiAgICAgICAgICAgICAgPG10ZXh0PjEyMzwvbXRleHQ+ CiAgICAgICAgICAgIDwvbXRkPgogICAgICAgICAgPC9tdHI+CiAgICAgICAgICA8bXRyPgogICAg ICAgICAgICA8bXRkPgogICAgICAgICAgICAgIDxtdGV4dD4xMjM0NTwvbXRleHQ+CiAgICAgICAg ICAgIDwvbXRkPgogICAgICAgICAgICA8bXRkPgogICAgICAgICAgICAgIDxtdGV4dD4xMjM0NTwv 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