Bug 160075

Created attachment 284310 [details] 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.