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| <html xmlns="http://www.w3.org/1999/xhtml"> |
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| <head> |
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| <title>CSS Test: table-layout: fixed - cell in the first row with specified width</title> |
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| <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> |
| <link rel="help" href="http://www.w3.org/TR/CSS21/tables.html#fixed-table-layout" /> |
| <link rel="bookmark" href="http://lists.w3.org/Archives/Public/www-style/2011Oct/0502.html" title="[css21] Section 17.5.2.1 should be clarified" /> |
| <link rel="match" href="fixed-table-layout-003f02-ref.xht" /> |
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| <meta name="flags" content="" /> |
| <meta name="assert" content="A cell in the first row with specified non-auto 'width' sets the width for its column in the absence of a column element with specified non-auto width. This test checks the 'border-collapse: collapse' model with zero horizontal cell padding and with non-zero symetrical horizontal cell borders." /> |
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| <style type="text/css"><![CDATA[ |
| div, table {font: 1.25em/1.2 serif;} |
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| table |
| { |
| border-collapse: collapse; |
| table-layout: fixed; |
| width: 300px; |
| } |
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| td {padding: 0px;} |
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| td#tested-cell |
| { |
| background-color: blue; |
| border-left: orange solid 60px; |
| border-right: orange solid 60px; |
| color: blue; |
| width: 80px; |
| } |
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| div#reference |
| { |
| background-color: black; |
| color: black; |
| margin-left: 50px; |
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| /* |
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| " |
| In the fixed table layout algorithm, the width of each column is determined as follows: |
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| (...) a cell in the first row with a value other than 'auto' for the 'width' property determines the width for that column. (...) |
| Any remaining columns equally divide the remaining horizontal table space (minus borders or cell spacing). |
| " |
| Section 17.5.2.1 Fixed table layout |
| http://www.w3.org/TR/CSS21/tables.html#fixed-table-layout |
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| Middle column width calculations |
| -------------------------------- |
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| 30px : half of border-left since such border must be split with cell in 1st column |
| + |
| 80px : width of cell in the middle column |
| + |
| 30px : half of border-right since such border must be split with cell in 3rd column |
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| ======= |
| 140px : width of the middle column |
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| So, |
| 300px : table set width |
| - |
| 140px : width of the middle column |
| ====== |
| 160px |
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| So, each of the 2 remaining columns must be |
| half of such extra horizontal table space, |
| which is 160px divided by 2 == 80px. |
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| 1st column width calculations |
| ----------------------------- |
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| (solve) : width of cell in 1st column |
| + |
| 30px : border-right of cell in 1st column |
| ====== |
| 80px : width of 1st column |
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| So, the width of the cell in first column must be exactly 50px. |
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| 3rd column width calculations |
| ----------------------------- |
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| 30px : border-left of cell in 3rd column |
| + |
| (solve) : width of cell in 3rd column |
| ======= |
| 80px : width of 3rd column |
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| So, the width of the cell in 3rd column must be exactly 50px. |
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| Finally, the precise horizontal point where the border-right of cell |
| in first column begins to be drawn, painted is: |
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| 50px : width of cell in 1st column |
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| Therefore the margin-left: 50px value of the div#reference. |
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| */ |
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| width: 200px; |
| } |
| ]]></style> |
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| </head> |
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| <body> |
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| <p>Test passes if the 2 orange slivers and blue stripe are as a whole <strong>exactly as wide as</strong> the black stripe.</p> |
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| <table> |
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| <col /> |
| <col /> |
| <col /> |
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| <tr> |
| <td></td> |
| <td id="tested-cell">F02</td> |
| <td></td> |
| </tr> |
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| </table> |
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| <div id="reference">200px wide</div> |
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| </body> |
| </html> |
