<!DOCTYPE html>
<html>
<title>CSS Grid: Change named grid lines.</title>
<link rel="author" title="Julien Chaffraix" href="mailto:jchaffraix@chromium.org"/>
<link rel="help" href="https://drafts.csswg.org/css-grid/#placement"/>
<meta name="assert" content="Checks that updating the named grid lines definitions in grid-template-{rows|columns} recomputes the positions of automatically placed grid items."/>
<link rel="issue" href="https://crbug.com/248151"/>
<link href="/css/support/grid.css" rel="stylesheet"/>
<link href="/css/support/alignment.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="/fonts/ahem.css"/>
<style>
.grid {
    grid-auto-flow: row dense;
}
#firstGridItem {
    grid-row: auto;
    grid-column: column;
}

#secondGridItem {
    grid-row: row;
    grid-column: auto;
}

#thirdGridItem {
    grid-row: auto;
    grid-column: auto;
}
</style>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/check-layout-th.js"></script>
<script>
function testGridDefinitions(gridTemplateRows, gridTemplateColumns, firstGridItemData, secondGridItemData, thirdGridItemData)
{
    var gridElement = document.getElementsByClassName("grid")[0];
    gridElement.style.gridTemplateRows = gridTemplateRows;
    gridElement.style.gridTemplateColumns = gridTemplateColumns;

    var firstGridItem = document.getElementById("firstGridItem");
    firstGridItem.setAttribute("data-expected-width", firstGridItemData.width);
    firstGridItem.setAttribute("data-expected-height", firstGridItemData.height);
    firstGridItem.setAttribute("data-offset-x", firstGridItemData.x);
    firstGridItem.setAttribute("data-offset-y", firstGridItemData.y);

    var secondGridItem = document.getElementById("secondGridItem");
    secondGridItem.setAttribute("data-expected-width", secondGridItemData.width);
    secondGridItem.setAttribute("data-expected-height", secondGridItemData.height);
    secondGridItem.setAttribute("data-offset-x", secondGridItemData.x);
    secondGridItem.setAttribute("data-offset-y", secondGridItemData.y);

    var thirdGridItem = document.getElementById("thirdGridItem");
    thirdGridItem.setAttribute("data-expected-width", thirdGridItemData.width);
    thirdGridItem.setAttribute("data-expected-height", thirdGridItemData.height);
    thirdGridItem.setAttribute("data-offset-x", thirdGridItemData.x);
    thirdGridItem.setAttribute("data-offset-y", thirdGridItemData.y);

    checkLayout(".grid", false);
}

function testChangingGridDefinitions()
{
    testGridDefinitions('10px [row] 20px', '30px [column]', { 'width': '0', 'height': '10', 'x': '30', 'y': '0' }, { 'width': '30', 'height': '20', 'x': '0', 'y': '10' }, { 'width': '30', 'height': '10', 'x': '0', 'y': '0' });
    testGridDefinitions('10px [row] 20px', '30px', { 'width': '0', 'height': '10', 'x': '30', 'y': '0' }, { 'width': '30', 'height': '20', 'x': '0', 'y': '10' }, { 'width': '30', 'height': '10', 'x': '0', 'y': '0' });
    testGridDefinitions('10px 20px [row]', '30px', { 'width': '0', 'height': '10', 'x': '30', 'y': '0' }, { 'width': '30', 'height': '0', 'x': '0', 'y': '30' }, { 'width': '30', 'height': '10', 'x': '0', 'y': '0' });
    testGridDefinitions('10px 20px [row]', '30px [column]', { 'width': '0', 'height': '10', 'x': '30', 'y': '0' }, { 'width': '30', 'height': '0', 'x': '0', 'y': '30' }, { 'width': '30', 'height': '10', 'x': '0', 'y': '0' });
    done();
}

</script>
<script type="text/javascript">
  setup({ explicit_done: true });
</script>
<body onload="document.fonts.ready.then(() => { testChangingGridDefinitions(); })">
<div style="position: relative">
    <div class="grid justifyContentStart">
        <div class="sizedToGridArea" id="firstGridItem"></div>
        <div class="sizedToGridArea" id="secondGridItem"></div>
        <div class="sizedToGridArea" id="thirdGridItem"></div>
    </div>
</div>

</body>
</html>