File: contain-paint-ignored-cases-ruby-containing-block-001.html

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<!doctype html>
<html lang=en>
  <head>
    <meta charset=utf-8>
    <title>CSS-contain test: paint containment on internal ruby elements.</title>
    <link rel="author" title="Yusuf Sermet" href="mailto:ysermet@mozilla.com">
    <link rel="help" href="https://drafts.csswg.org/css-contain/#containment-paint">
    <link rel="match" href="contain-paint-ignored-cases-ruby-containing-block-001-ref.html">
    <meta name="assert" content="Paint containment should not apply to ruby base, ruby base container, ruby text, and ruby text container. This test confirms contain:paint does not act as a containing block for fixed positioned descendants.">
    <style>
      rb,
      rbc,
      rt,
      rtc {
        contain: paint;
        background-color: yellow;
        font-size: 2em;
      }
      rbc {
        display: ruby-base-container;
      }
      .contained {
        width: 50px;
        height: 10px;
        background-color: blue;
        top: 0;
        left: 0;
        position: fixed;
      }
      .wrapper {
        display: inline-block;
      }
    </style>
  </head>
  <body>
    <div class="wrapper"><ruby><rt>&emsp;<div class="contained"></div></rt></ruby></div>
    <div class="wrapper"><ruby><rtc>&emsp;<div class="contained"></div></rtc></ruby></div>
    <div class="wrapper"><ruby><rb>&emsp;<div class="contained"></div></rb></ruby></div>
    <div class="wrapper"><ruby><rbc>&emsp;<div class="contained"></div></rbc></ruby></div>
  </body>
</html>