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Reported by Boris Zbarsky. 17.5.2.1 (http://www.w3.org/TR/CSS2/tables.html#fixed-table-layout) says: # A column element with a value other than 'auto' for the 'width' # property sets the width for that column. # # Otherwise, a cell in the first row with a value other than 'auto' for # the 'width' property determines the width for that column. If the # cell spans more than one column, the width is divided over the # columns. There is poor interop for how the cell determines the column width. Boris proposes something like: | Otherwise a cell in the first row with a value other than 'auto' for | the width property determines the width for that column as follows: | | * In the collapsed border model, the width is the width of the cell | plus its left and right padding and half the left and right borders. | * In the separated border model, the with is the width of the cell | plus its left and right padding and left and right borders. but notes that there are issues here with percentage paddings and with whether the borders used are before or after conflict resolution in the collapsed border model. Conversation begins: http://lists.w3.org/Archives/Public/www-style/2011Apr/0743.html Bug description: http://lists.w3.org/Archives/Public/www-style/2011Apr/0743.html Proposal: http://lists.w3.org/Archives/Public/www-style/2011Oct/0503.html
Test suite tests: http://lists.w3.org/Archives/Public/www-style/2011Oct/0546.html
> Test suite tests: > http://lists.w3.org/Archives/Public/www-style/2011Oct/0546.html That page is still good and ok. The 52 submitted tests in the test suite are accessible at http://test.csswg.org/suites/css2.1/nightly-unstable/html4/chapter-17.html#s17.5.2.1 and they start with fixed-table-layout-003a01 : http://test.csswg.org/suites/css2.1/nightly-unstable/html4/fixed-table-layout-003a01.htm and the last one is fixed-table-layout-003f08 http://test.csswg.org/suites/css2.1/nightly-unstable/html4/fixed-table-layout-003f08.htm Gérard
This bug report seems to be a DUPLICATE of Bug 14473 - column-sizing algorithm forgets to include padding and borders
Similar bug: Bug 15577 (Border vagueness in definition of table width in fixed table layout) where a similar consideration regarding the difference between collapsed border model and separated border model applies.
*** Bug 14473 has been marked as a duplicate of this bug. ***
Bug 17134 concerns what seems to be the analogous issue for how cells determine the row height for non-auto-height table rows.