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<!doctype html>
<title>TABLE height redistribution</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<script src="/resources/check-layout-th.js"></script>
<link rel='stylesheet' href='../support/base.css' />
<link rel='stylesheet' href='./support/table-tentative.css' />
<link rel="author" title="Aleks Totic" href="atotic@chromium.org" />
<link rel="help" href="https://drafts.csswg.org/css-tables-3/#row-layout" />
<style>
main table {
border-spacing: 0px;
background: rgba(255,0,0,0.3);
height: 100px;
width: 100px;
}
main td {
padding: 0;
}
main table tbody:nth-child(1) {
background: #CCC;
}
main table tbody:nth-child(2) {
background: #AAA;
}
main table tbody:nth-child(3) {
background: #999;
}
main table thead {
background: rgba(0,255,0,0.3);
}
main table tfoot {
background: rgba(255,255,0,0.3);
}
.debug {
width:100px;
height:1px;
position:relative;
}
.debug pre {
position:absolute;
font: 30px/30px monospace;
left: 120px;
top:-30px;
}
</style>
<main>
<h1>Tests for redistribution of table height to row group height.</h1>
<p>This algorithm has not been standardized. Browsers implementations disagree a lot.
Legacy Chrome used to always distribute all the height to the first tbody.</p>
<pre class=error>Major incompatibility: Legacy:
- ignores any height set on sections.
- does not size the table unless section has a TR
- does not grow sections without TDs
- only distributes height to the 1st tbody
FF
- does not prioritize thead for height distribution most of the time.
- y offset of multiple tbodies can be incorrect.
</pre>
<h2>Empty table</h2>
<p>Empty tables always grow to specified height in all browsers.</p>
<p class="testdesc">no sections</p>
<table data-expected-height=100></table>
<p class="testdesc">no sections, no border spacing</p>
<table style="border-spacing: 0" data-expected-height=100></table>
<p class="testdesc">collapsed table no sections</p>
<table style="border-collapse:collapse" data-expected-height=100></table>
<p class="testdesc">fixed table no sections</p>
<table style="table-layout:fixed" data-expected-height=100></table>
<h2>One TBODY</h2>
<p>The big difference here is between empty TBODY, and a body with an empty TR</p>
<li>FF: always sizes the table, only sizes TBODY if it has TR.</li>
<li>Legacy: does not size the table unless TBODY has TR</li>
<p>FF: sizes the table, but tbody size remains 0 unless tbody is not empty.</p>
<p>Legacy table size remains 0, or border-spacing</p>
<p class="testdesc">single empty tbody</p>
<table data-expected-height=100>
<tbody data-expected-height=100></tbody>
</table>
<p class="testdesc">single tbody+tr</p>
<table data-expected-height=100>
<tbody data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">border spacing</p>
<p class="error">FF/Legacy do not apply border-spacing</p>
<table style="border-spacing: 10px" data-expected-height=100>
<tbody data-expected-height=80><tr></tr></tbody>
</table>
<p class="testdesc">collapsed table</p>
<table style="border-collapse:collapse" data-expected-height=100>
<tbody data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">fixed table</p>
<table style="table-layout:fixed" data-expected-height=100>
<tbody data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">tbody has fixed height</p>
<p class="error">FF adds tbody height to table?</p>
<table data-expected-height=100>
<tbody style="height:50px" data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">tbody has fixed height > table</p>
<p class="error">Legacy: table size wins. FF: table size wins, but body grows to 300px?</p>
<table data-expected-height=200>
<tbody style="height:200px" data-expected-height=200><tr></tr></tbody>
</table>
<p class="testdesc">tr has fixed height > table</p>
<p class="error">FF: table size wins, but body is 300.</p>
<table data-expected-height=200>
<tbody data-expected-height=200><tr style="height:200px"></tr></tbody>
</table>
<p class="testdesc">tbody has percentage height > table</p>
<table data-expected-height=100>
<tbody style="height:200%" data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">tr has percentage height > table</p>
<p class=error>FF/Legacy: table wins. FF: body is 200px</p>
<table data-expected-height=100>
<tbody data-expected-height=100><tr style="height:200%"></tr></tbody>
</table>
<p class="testdesc">non-empty tbody</p>
<table data-expected-height=100>
<tbody data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">non-empty thead</p>
<table data-expected-height=100>
<thead data-expected-height=100><tr></tr></thead>
</table>
<h2>THEAD TBODY</h2>
<p class="testdesc">empty thead, empty tbody</p>
<p class="error">FF thead/tbody both grow</p>
<table data-expected-height=100>
<thead data-expected-height=0><tr></tr></thead>
<tbody data-expected-height=100><tr></tr></tbody>
</table>
<p class="testdesc">sized thead, empty tbody</p>
<table data-expected-height=100>
<thead data-expected-height=20><td style="height:20px">thead</td></thead>
<tbody data-expected-height=80><tr></tr></tbody>
</table>
<p class="testdesc">table layout fixed, thead with td, tbody</p>
<table style="table-layout:fixed" data-expected-height=100>
<thead data-expected-height=20>
<tr>
<td style="height:20px">thead</td>
</tr>
</thead>
<tbody data-expected-height=80><tr><td>x</td></tr></tbody>
</table>
<p class="testdesc">table layout fixed, thead+td, tbody+td</p>
<table style="table-layout:fixed" data-expected-height=100>
<thead data-expected-height=20>
<tr>
<td style="height:20px">thead</td>
</tr>
</thead>
<tbody data-expected-height=80><tr><td>x</td></tr></tbody>
</table>
<p class="testdesc">thead with td</p>
<table data-expected-height=100>
<thead data-expected-height=20>
<tr>
<td style="height:20px">thead</td>
</tr>
</thead>
<tbody data-expected-height=80>
<tr>
</tr>
</tbody>
</table>
<p class="testdesc">tfoot with td</p>
<table data-expected-height=100>
<tfoot data-expected-height=20>
<tr>
<td style="height:20px">tfoot</td>
</tr>
</tfoot>
<tbody data-expected-height=80>
<tr>
</tr>
</tbody>
</table>
<h2>Multiple TBODY</h2>
<p class="error">Legacy does not distribute any heights when tr is empty.</p>
<p class="error">Legacy always distributes everything to 1st tbody.</p>
<p class="testdesc">2 tbody</p>
<table data-expected-height=100>
<tbody data-expected-height=50><tr></tr></tbody>
<tbody data-expected-height=50><tr></tr></tbody>
</table>
<p class="testdesc">2 tbody, with non-empty tds</p>
<p class="error">Legacy distributes everything to 1st tbody</p>
<table data-expected-height=100>
<tbody data-expected-height=50><tr><td>x</td></tr></tbody>
<tbody data-expected-height=50><tr><td>x</td></tr></tbody>
</table>
<p class="testdesc">2 tbody, 40%, auto, no td</p>
<p class="error">FF: distributes everything to auto when empty. Legacy does not distribute</p>
<table data-expected-height=100>
<tbody style="height:40%" data-expected-height=40><tr></tr></tbody>
<tbody data-expected-height=60><tr></tr></tbody>
</table>
<p class="testdesc">2 tbody, 40%, auto, non-empty td</p>
<table data-expected-height=100>
<tbody style="height:40%" data-expected-height=40><tr><td>x</td></tr></tbody>
<tbody data-expected-height=60><tr><td>x</td></tr></tbody>
</table>
<p class="testdesc">2 tbody, 40px, auto, non-empty td</p>
<p class="error">FF gets confused with 2nd body placement</p>
<table data-expected-height=100>
<tbody style="height:40px" data-expected-height=40><tr><td>x</td></tr></tbody>
<tbody data-expected-height=60 data-offset-y=40><tr><td>x</td></tr></tbody>
</table>
<p class="testdesc">2 tbody, 40%, 40px, non-empty td</p>
<p class="error">FF splits evenly</p>
<table data-expected-height=100>
<tbody style="height:40%" data-expected-height=40><tr><td>x</td></tr></tbody>
<tbody style="height:40px" data-expected-height=60 data-offset-y=40><tr><td>x</td></tr></tbody>
</table>
<h2>Sized THEAD/TBODY</h2>
<p class=error>FF does not prioritize TBODY for distribution</p>
<p class="testdesc">20px thead, 30px tbody</p>
<table data-expected-height=100>
<thead data-expected-height=20 style="height:20px">
<tr><td>x</td></tr>
</thead>
<tbody data-expected-height=80 style="height:30px">
<tr><td>x</td></tr>
</tbody>
</table>
<p class="testdesc">20px thead's tr, 30px tbody's tr</p>
<table data-expected-height=100>
<thead data-expected-height=20 >
<tr style="height:20px"><td>x</td></tr>
</thead>
<tbody data-expected-height=80 >
<tr style="height:30px"><td>x</td></tr>
</tbody>
</table>
<p class="testdesc">20px thead's td, 30px tbody's td</p>
<table data-expected-height=100>
<thead data-expected-height=20 >
<tr><td style="height:20px">x</td></tr>
</thead>
<tbody data-expected-height=80 >
<tr><td style="height:30px">x</td></tr>
</tbody>
</table>
</main>
<script>
checkLayout("table");
// Display body sizes next to the table.
for (let table of Array.from(document.querySelectorAll("table"))) {
let d = document.createElement("div");
d.classList.add("debug");
let log = document.createElement("pre");
d.appendChild(log);
let text = "";
let x;
x = table.querySelector("thead");
if (x)
text += `h:${x.offsetHeight}\n`;
x = table.querySelectorAll("tbody");
if (x.length > 0)
for (body of Array.from(x))
text += `b:${body.offsetHeight}\n`;
x = table.querySelector("tfoot");
if (x)
text += `f:${x.offsetHeight}\n`;
log.innerText = text;
table.parentNode.insertBefore(d, table);
}
</script>
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