testing/web-platform/tests/css/css-text/letter-spacing/letter-spacing-bidi-004.xht


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<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta charset="utf-8"/>
    <title>CSS Text level 3 Test: letter spacing is between letters, with bidi</title>
    <link rel="author" title="Mike Bremford" href="http://bfo.com" />
    <link rel="help" href="https://drafts.csswg.org/css-text-3/#letter-spacing-property" />
    <link rel="match" href="reference/letter-spacing-bidi-004-ref.xht" />
    <meta name="assert" content="letter spacing should be applied between letters, not after letters. The latter will cause the colored backgrounds of the span elements to expand."/>
    <style>
      .test, .control {
          font: 50px/1 monospace;
          font-kerning: none;
      }
      .control {
          position: absolute;
          color: red;
          z-index: -1;
          white-space: pre;
      }
      .control span {
          /* to ensure both background and text must overlay */
          background: linear-gradient(to bottom, red 50%, green 50%, green 100%);
      }
      .test span {
          background: linear-gradient(to bottom, green 50%, transparent 50%, transparent 100%);
      }
      .wide {
          letter-spacing: 2ch;
      }
      .narrow {
          letter-spacing: 1ch;
      }
    </style>
 </head>
 <body>
  <p>Test passes if no red is visible except for anti-aliasing differences, and the green boxes are the width of a single letter.</p>
  <!-- A <ls> B <ls> <bg>C</bg> <ls> gimel <ls> bet <ls> <bg>alef</bg> <gap> -->
  <div class="control">A B <span>C</span> &#x5d1; &#x5d2; <span style="unicode-bidi:embed">&#x5d0;</span></div>
  <div class="test narrow">AB<span class="wide">C&#x5d0;</span>&#x5d1;&#x5d2;</div>
  </body>
</html>