khronosschoty
/
palemoon-dev


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en" class="reftest-wait">
<meta charset="utf-8">
<title>This test fails - layerization should respect overflow:hidden clips around things with animated position</title>

<style>

div {
  min-height: 50px;
  box-model: border-box;
}

.first, .second {
  border: 1px solid blue;
  margin: 50px 0;
  position: relative;
}

.border {
  border: 1px solid black;
}

.clip {
  height: auto;
  overflow: hidden;
  padding: 10px 0 20px;
}

.animated-position {
  position: relative;
  left: 20px;
  margin-left: 220px;
  width: 100px;
  height: 100px;
  border-color: red;
}

body {
  margin: 0;
  padding: 0 100px;
  height: 3000px;
}

</style>

<div class="first" reftest-assigned-layer="page-background">
  <!--
    This is just a regular box, it should end up in the page background layer.
  -->
</div>

<div class="clip border">
  <div class="border animated-position reftest-no-paint reftest-opaque-layer">
    <!--
      The background of .clip is uniform and opaque,
      .animated-position should be able to pull up that background color and
      become opaque itself.
      However, since this clip is not created by an animated geometry root that
      is a scrollable frame, we currently fail to recognize it, so this test
      will fail.
    -->
  </div>
</div>

<div class="second" reftest-assigned-layer="page-background">
  <!--
    This should share a layer with .first and the page background.
    However, since we don't recognize that .animated-position is contained in
    a clip, .second gets its own layer above .animated-position, so this test
    will fail.
  -->
</div>

<script>

var animatedLeft = document.querySelector(".animated-position");

function doTest() {
  animatedLeft.style.left = "-40px";
  document.documentElement.removeAttribute("class");
}

// Layerize #animatedLeft
animatedLeft.offsetLeft;
animatedLeft.style.left = "40px";
animatedLeft.offsetLeft;
animatedLeft.style.left = "60px";
animatedLeft.offsetLeft;

document.addEventListener("MozReftestInvalidate", doTest, false);
setTimeout(doTest, 200);

</script>