<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Stack parameters</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#fractions-mfrac">
<meta name="assert" content="Element mfrac correctly uses the stack parameters from the MATH table.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/fonts.js"></script>
<style>
  math, mspace {
    font-size: 10px;
  }
  @font-face {
    font-family: bottomdisplaystyleshiftdown5000-axisheight1000;
    src: url("/fonts/math/stack-bottomdisplaystyleshiftdown5000-axisheight1000.woff");
  }
  @font-face {
    font-family: bottomshiftdown6000-axisheight1000;
    src: url("/fonts/math/stack-bottomshiftdown6000-axisheight1000.woff");
  }
  @font-face {
    font-family: displaystylegapmin4000;
    src: url("/fonts/math/stack-displaystylegapmin4000.woff");
  }
  @font-face {
    font-family: gapmin8000;
    src: url("/fonts/math/stack-gapmin8000.woff");
  }
  @font-face {
    font-family: topdisplaystyleshiftup3000-axisheight1000;
    src: url("/fonts/math/stack-topdisplaystyleshiftup3000-axisheight1000.woff");
  }
  @font-face {
    font-family: topshiftup9000-axisheight1000;
    src: url("/fonts/math/stack-topshiftup9000-axisheight1000.woff");
  }
</style>
<script>
  var emToPx = 10 / 1000; // font-size: 10px, font.em = 1000
  var epsilon = 1;

  function getBox(aId) {
    return document.getElementById(aId).getBoundingClientRect();
  }

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

  function runTests() {

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 5000 * emToPx;
      assert_approx_equals(getBox("den0002").top - getBox("ref0002").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomDisplayStyleShiftDown");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 5000 * emToPx;
      assert_approx_equals(getBox("den0002b").top - getBox("ref0002b").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomDisplayStyleShiftDown Displaystyle");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 5000 * emToPx;
      assert_approx_equals(getBox("den0002c").top - getBox("ref0002c").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomDisplayStyleShiftDown Displaystyle om fraction");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 6000 * emToPx;
      assert_approx_equals(getBox("den0003").top - getBox("ref0003").bottom,
                           v, epsilon, "mfrac: denominator shift");
    }, "BottomShiftDown");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 4000 * emToPx;
      assert_approx_equals(getBox("den0004").top - getBox("num0004").bottom,
                           v, epsilon, "mfrac: gap");
    }, "DisplayStyleGapMin");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 4000 * emToPx;
      assert_approx_equals(getBox("den0004b").top - getBox("num0004b").bottom,
                           v, epsilon, "mfrac: gap");
    }, "DisplayStyleGapMin Dsiplaystyle");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 4000 * emToPx;
      assert_approx_equals(getBox("den0004c").top - getBox("num0004c").bottom,
                           v, epsilon, "mfrac: gap");
    }, "DisplayStyleGapMin Dsiplaystyle on fraction");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 8000 * emToPx;
      assert_approx_equals(getBox("den0005").top - getBox("num0005").bottom,
                           v, epsilon, "mfrac: gap");
    }, "GapMin");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 3000 * emToPx;
      assert_approx_equals(getBox("ref0006").top - getBox("num0006").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "TopDisplayStyleShiftUp");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 3000 * emToPx;
      assert_approx_equals(getBox("ref0006b").top - getBox("num0006b").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "TopDisplayStyleShiftUp Displaystyle");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 3000 * emToPx;
      assert_approx_equals(getBox("ref0006c").top - getBox("num0006c").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "TopDisplayStyleShiftUp Displaystyle on fraction");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 9000 * emToPx;
      assert_approx_equals(getBox("ref0007").top - getBox("num0007").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "ToShiftUp");

    test(function() {
      assert_true(MathMLFeatureDetection.has_mspace());

      var v = 9000 * emToPx;
      assert_approx_equals(getBox("ref0007b").top - getBox("num0007b").bottom,
                           v, epsilon, "mfrac: numerator shift");
    }, "ToShiftUp with Displaystyle on fraction");

    done();
  }
</script>
</head>
<body>
  <div id="log"></div>
  <p>
    <math display="block" style="font-family: bottomdisplaystyleshiftdown5000-axisheight1000;">
      <mspace id="ref0002" width="3em" height="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0002" style="background: blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math displaystyle="true" style="font-family: bottomdisplaystyleshiftdown5000-axisheight1000;">
      <mspace id="ref0002b" width="3em" height="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0002b" style="background: blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: bottomdisplaystyleshiftdown5000-axisheight1000;">
      <mspace id="ref0002c" width="3em" height="1em" style="background: green"/>
      <mfrac displaystyle="true" linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0002c" style="background: blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: bottomshiftdown6000-axisheight1000;">
      <mspace id="ref0003" width="3em" height="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em"/>
        <mspace width="3em" depth="1em" id="den0003" style="background: blue"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math display="block" style="font-family: displaystylegapmin4000;">
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0004" style="background: blue"/>
        <mspace width="3em" depth="1em" id="den0004" style="background: green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math displaystyle="true" style="font-family: displaystylegapmin4000;">
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0004b" style="background: blue"/>
        <mspace width="3em" depth="1em" id="den0004b" style="background: green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: displaystylegapmin4000;">
      <mfrac displaystyle="true" linethickness="0px">
        <mspace width="3em" height="1em" id="num0004c" style="background: blue"/>
        <mspace width="3em" depth="1em" id="den0004c" style="background: green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: gapmin8000;">
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0005" style="background: blue"/>
        <mspace width="3em" depth="1em" id="den0005" style="background: green"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math display="block" style="font-family: topdisplaystyleshiftup3000-axisheight1000;">
      <mspace id="ref0006" width="3em" depth="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0006" style="background: blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math displaystyle="true" style="font-family: topdisplaystyleshiftup3000-axisheight1000;">
      <mspace id="ref0006b" width="3em" depth="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0006b" style="background: blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: topdisplaystyleshiftup3000-axisheight1000;">
      <mspace id="ref0006c" width="3em" depth="1em" style="background: green"/>
      <mfrac displaystyle="true" linethickness="0px">
        <mspace width="3em" height="1em" id="num0006c" style="background: blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: topshiftup9000-axisheight1000;">
      <mspace id="ref0007" width="3em" depth="1em" style="background: green"/>
      <mfrac linethickness="0px">
        <mspace width="3em" height="1em" id="num0007" style="background: blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
  <hr/>
  <p>
    <math displaystyle="true" style="font-family: topshiftup9000-axisheight1000;">
      <mspace id="ref0007b" width="3em" depth="1em" style="background: green"/>
      <mfrac displaystyle="false" linethickness="0px">
        <mspace width="3em" height="1em" id="num0007b" style="background: blue"/>
        <mspace width="3em"/>
      </mfrac>
    </math>
  </p>
</body>
</html>
