layout/reftests/invalidation/paintedlayer-recycling-5.html
author Chris H-C <chutten@mozilla.com>
Fri, 22 Mar 2019 17:31:02 +0000
changeset 465740 c3d4eb5b3b2223aa6734bb8c2d39457ee768fc3c
parent 329664 7b434711753b98a87603453caaa0945791ffe12b
permissions -rw-r--r--
Bug 1536805 - Document Origin Telemetry r=janerik Differential Revision: https://phabricator.services.mozilla.com/D24263

<!DOCTYPE html>
<html lang="en" class="reftest-wait">
<meta charset="utf-8">
<title>Removing an existing display item that has its own PaintedLayer shouldn't cause invalidations in other PaintedLayers on top of it</title>

<style>

.content {
  box-sizing: border-box;
  width: 200px;
  height: 200px;
  border: 1px solid black;
}

.fixed {
  position: fixed;
  top: 20px;
  left: 140px;
}

.onTopOfFixed {
  position: absolute;
  top: 120px;
  left: 260px;
}

.reftest-no-paint {
  border-color: lime;
}

#aboutToBecomeHidden {
  left: 20px;
}

body {
  margin: 0;
  padding: 20px;
  height: 3000px;
}

</style>

<div class="fixed content">
  <!--
    This layer is just there to force .onTopOfFixed into PaintedLayers above
    the page background.
  -->
</div>

<div class="onTopOfFixed content" id="aboutToBecomeHidden" style="visibility: visible">
  <!--
    This item starts out visible, and has its own PaintedLayer.
  -->
</div>

<div class="fixed content">
  <!--
    This layer is just there to force the next .onTopOfFixed into its own
    PaintedLayer.
  -->
</div>

<div class="onTopOfFixed reftest-no-paint content">
  <!--
    This item shouldn't repaint when the other .onTopOfFixed item is hidden.
  -->
</div>

<script>

function doTest() {
  document.querySelector("#aboutToBecomeHidden").style.visibility = "hidden";
  document.documentElement.removeAttribute("class");
}
document.addEventListener("MozReftestInvalidate", doTest);

</script>