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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+
+ <head>
+
+ <title>CSS Test: table-layout: fixed - cell in the first row with specified width</title>
+
+ <link rel="author" title="GĂ©rard 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-003e08-ref.xht" />
+
+ <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 non-zero symetrical horizontal cell padding and with one non-zero horizontal cell borders." />
+
+ <style type="text/css"><![CDATA[
+ div, table {font: 1.25em/1.2 serif;}
+
+ table
+ {
+ border-collapse: collapse;
+ table-layout: fixed;
+ width: 300px;
+ }
+
+ td {padding: 0px 24px;}
+
+ td#tested-cell
+ {
+ background-color: blue;
+ border-left: orange solid 72px;
+ border-right: orange solid 0px;
+ color: blue;
+ width: 80px;
+ }
+
+ div#reference
+ {
+ background-color: black;
+ color: black;
+ margin-left: 32px;
+
+ /*
+
+ "
+ In the fixed table layout algorithm, the width of each column is determined as follows:
+
+ (...) 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
+
+
+ Middle column width calculations
+ --------------------------------
+
+ 36px : half of border-left since such border must be split with cell in 1st column
+ +
+ 24px : padding-left of the cell in the middle column
+ +
+ 80px : width of the cell in the middle column
+ +
+ 24px : padding-right of the cell in the middle column
+
+ =======
+ 164px : width of the middle column
+
+
+ So,
+ 300px : table set width
+ -
+ 164px : width of the middle column
+ ======
+ 136px
+
+ So, each of the 2 remaining columns must be
+ half of such extra horizontal table space,
+ which is 136px divided by 2 == 68px.
+
+ 1st column width calculations
+ -----------------------------
+
+ 24px : padding-left of cell in 1st column
+ +
+ (solve) : width of cell in 1st column
+ +
+ 24px : padding-right of cell in 1st column
+ +
+ 36px : border-right of cell in 1st column
+ which is half of border-left of cell in middle column
+ ======
+ 68px : width of 1st column
+
+ So, the width of the cell in first column must be exactly -16px !
+
+
+ 3rd column width calculations
+ -----------------------------
+
+ 24px : padding-left of cell in 3rd column
+ +
+ (solve) : width of cell in 3rd column
+ +
+ 24px : padding-right of cell in 3rd column
+ =======
+ 68px : width of 3rd column
+
+ So, the width of the cell in 3rd column must be exactly 20px.
+
+
+ Finally, the precise horizontal point where the border-right of cell
+ in first column begins to be drawn, painted is:
+
+ 24px : padding left of cell in 1st column
+ +
+ -16px : width of cell in 1st column
+ +
+ 24px : padding right of cell in 1st column
+ =======
+ 32px
+
+ Therefore the margin-left: 32px value of the div#reference.
+
+ */
+
+ width: 200px;
+ }
+ ]]></style>
+
+ </head>
+
+ <body>
+
+ <p>Test passes if the orange stripe and blue stripe are as a whole <strong>exactly as wide as</strong> the black stripe.</p>
+
+ <table>
+
+ <col />
+ <col />
+ <col />
+
+ <tr>
+ <td></td>
+ <td id="tested-cell">E08</td>
+ <td></td>
+ </tr>
+
+ </table>
+
+ <div id="reference">200px wide</div>
+
+ </body>
+</html>