<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Space</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#space-mspace">
<meta name="assert" content="Verify mspace metrics for different values of height, depth and width">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  var epsilon = 1;
  function getBox(aId) {
    var box = document.getElementById(aId).getBoundingClientRect();
    box.middle = (box.bottom + box.top) / 2;
    box.center = (box.left + box.right) / 2;
    return box;
  }

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

  function runTests() {
    test(function() {
      var empty = getBox("empty");
      assert_equals(empty.width, 0, "zero width");
      assert_approx_equals(getBox("baseline").bottom - empty.top, 0, epsilon, "zero depth");
      assert_approx_equals(empty.bottom - getBox("baseline").bottom, 0, epsilon, "zero depth");
    }, "Empty mspace");

    test(function() {
      for (var i = 0; i <= 2; i++) {
        var space = getBox("width" + i);
        assert_approx_equals(space.width, 25*(i+1), epsilon, "width " + i);
        assert_approx_equals(getBox("baseline").bottom - space.top, 0, epsilon, "height" + i);
        assert_approx_equals(space.bottom - getBox("baseline").bottom, 0, epsilon, "depth" + i);
      }
    }, "Different widths");

    test(function() {
      for (var i = 0; i <= 2; i++) {
        var space = getBox("height" + i);
        assert_equals(space.width, 0, "width" + i);
        assert_approx_equals(getBox("baseline").bottom - space.top, 25*(i+1), epsilon, "height" + i);
        assert_approx_equals(space.bottom - getBox("baseline").bottom, 0, epsilon, "depth" + i);
      }
    }, "Different heights");

    test(function() {
      for (var i = 0; i <= 2; i++) {
        var space = getBox("depth" + i);
        assert_equals(space.width, 0, "width" + i);
        assert_approx_equals(getBox("baseline").bottom - space.top, 0, epsilon, "height" + i);
        assert_approx_equals(space.bottom - getBox("baseline").bottom, 25*(i+1), epsilon, "depth" + i);
      }
    }, "Different depths");

    test(function() {
      for (var i = 0; i <= 2; i++) {
        var space = getBox("mspace" + i);
        assert_approx_equals(space.width, 25*(1+i%3), epsilon, "width" + i);
        assert_approx_equals(getBox("baseline").bottom - space.top, 25*(1+(i+1)%3), epsilon, "height" + i);
        assert_approx_equals(space.bottom - getBox("baseline").bottom, 25*(1+(i+2)%3), epsilon, "depth" + i);
      }
    }, "Various combinations of height, depth and width.");

    test(function() {
      var container = document.getElementById("containerForPreferredWidth");
      var mspace = container.getElementsByTagName("mspace")[0];
      var containerWidth = container.getBoundingClientRect().width;
      var mspaceWidth = mspace.getBoundingClientRect().width;
      assert_approx_equals(containerWidth, mspaceWidth, epsilon);
    }, "Preferred width");

    // Dynamically set attributes.
    ["width", "height", "depth"].forEach(function (name, index) {
        document.getElementById("dynamic-remove").removeAttribute(name);
        let length = `${50 + index * 10}px`;
        document.getElementById("dynamic-attach").setAttribute(name, length);
        document.getElementById("dynamic-modify").setAttribute(name, length);
    });
    let baseline = getBox("baseline2").bottom;

    test(function() {
        let remove = getBox("dynamic-remove");
        assert_approx_equals(remove.width, 0, epsilon);
        assert_approx_equals(remove.height, 0, epsilon);
        assert_approx_equals(remove.top, baseline, epsilon);
    }, "dynamic attributes (remove)");

    test(function() {
        let attach = getBox("dynamic-attach");
        assert_approx_equals(attach.width, 50, epsilon);
        assert_approx_equals(attach.height, 60 + 70, epsilon);
        assert_approx_equals(baseline - attach.top, 60, epsilon);
    }, "dynamic attributes (attach)");

    test(function() {
        let modify = getBox("dynamic-modify");
        assert_approx_equals(modify.width, 50, epsilon);
        assert_approx_equals(modify.height, 60 + 70, epsilon);
        assert_approx_equals(baseline - modify.top, 60, epsilon);
    }, "dynamic attributes (modify)");

    done();
  }
</script>
<style>
div.shrink-wrap {
  background: yellow;
  display: inline-block;
  margin-top: 5px;
  padding-top: 5px;
}
</style>
</head>
<body>
  <div id="log"></div>
  <p>
    <span id="baseline" style="display: inline-block; width: 30px; height: 5px; background: blue"></span>
    <math>
      <mspace id="empty"/>
      <mspace id="width0" width="25px"/>
      <mspace id="width1" width="50px"/>
      <mspace id="width2" width="75px"/>
      <mspace id="height0" height="25px"/>
      <mspace id="height1" height="50px"/>
      <mspace id="height2" height="75px"/>
      <mspace id="depth0" depth="25px"/>
      <mspace id="depth1" depth="50px"/>
      <mspace id="depth2" depth="75px"/>
      <mspace id="mspace0" width="25px" height="50px" depth="75px" style="background: green"/>
      <mspace id="mspace1" width="50px" height="75px" depth="25px" style="background: blue"/>
      <mspace id="mspace2" width="75px" height="25px" depth="50px" style="background: green"/>
    </math>
  </p>
  <div>
    <div id="containerForPreferredWidth" class="shrink-wrap">
      <math><mspace width="75px" height="25px" depth="50px" style="background: green"/></math>
    </div>
  </div>
  <p>
    <span id="baseline2" style="display: inline-block; width: 30px; height: 5px; background: blue"></span>
    <math>
      <mspace id="dynamic-attach" style="background: lightgreen"/>
      <mspace id="dynamic-remove" width="10px" height="20px" depth="30px" style="background: lightyellow"/>
      <mspace id="dynamic-modify" width="100px" height="200px" depth="300px" style="background: pink"/>
    </math>
  </p>
</body>
</html>
