<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>writing mode</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
<meta name="assert" content="Verify CSS writing mode (writing-mode and direction properties) for mrow.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/layout-comparison.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<script>
  var epsilon = 1;

  setup({ explicit_done: true });
  window.addEventListener("load", runTests);

  function runTests() {
      for (tag in MathMLFragments) {
          if (tag == "annotation" || tag == "annotation-xml")
              continue; // These tags have display: none.

          ["horizontal-tb_rtl"].forEach(id => {
               var writingMode = id.split("_");
               var writingModeString = `writing-mode: ${writingMode[0]}; direction: ${writingMode[1]};`;

               document.body.insertAdjacentHTML("beforeend", `<div>\
<math>${MathMLFragments[tag]}</math>\
<math>${MathMLFragments[tag]}</math>\
</div>`);
               var div = document.body.lastElementChild;

               var styleMath = div.firstElementChild;
               styleMath.setAttribute("style", writingModeString);
               var styleElement = FragmentHelper.element(styleMath);

               var referenceMath = div.lastElementChild;
               var referenceElement = FragmentHelper.element(referenceMath);

               [styleMath, referenceMath].forEach(math => {
                   Array.from(math.getElementsByClassName("mathml-container")).forEach(container => {
                       container.insertAdjacentHTML("beforeend", "\
<mspace style='background: blue'\
        width='20px' height='30px' depth='40px'></mspace>\
<mspace style='background: black'\
        width='50px' depth='60px'></mspace>\
<mspace style='background: yellow'\
        width='70px' height='80px'></mspace>");
                   });
                   Array.from(math.getElementsByClassName("foreign-container")).forEach(container => {
                       container.insertAdjacentHTML("beforeend", "\
<span style='display: inline-block; background: lightblue;\
             inline-size: 20px; block-size: 30px;\
             vertical-align: bottom;'></span>\
<span style='display: inline-block; background: pink;\
             inline-size: 40px; block-size: 50px;\
             vertical-align: bottom;'></span>");
                   });
               });

               test(function() {
                   assert_true(MathMLFeatureDetection.has_mspace());
                   var style = window.getComputedStyle(styleElement);
                   assert_equals(style.getPropertyValue("writing-mode"),
                                 writingMode[0], "writing-mode");
                   assert_equals(style.getPropertyValue("direction"),
                             writingMode[1], "direction");
                   compareLayout(styleElement, referenceElement, epsilon);
               }, `Layout of ${tag} (${writingModeString})`);

               div.style = "display: none;"; // Hide the div after testing.
           });
      }
      done();
  }
</script>
</head>
<body>
  <div id="log"></div>
</body>
</html>
