<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>margin</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#layout-algorithms">
<meta name="assert" content="Verify that margin is taken into account on children.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/mathml-fragments.js"></script>
<script src="/mathml/support/layout-comparison.js"></script>
<script>
  var epsilon = 1;

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

  function runTests() {

    for (tag in MathMLFragments) {
        if (!FragmentHelper.isValidChildOfMrow(tag) ||
            FragmentHelper.isEmpty(tag) ||
            FragmentHelper.isTokenElement(tag) ||
            tag == "semantics" ||
            tag == "maction" ||
            tag == "mtable")
            continue;

        test(function() {
            assert_true(MathMLFeatureDetection[`has_${tag}`](), `${tag} is supported`);

            document.body.insertAdjacentHTML("beforeend", `<hr/><div>\
<div style="display: inline-block; border: 1px dashed blue;"><math>${MathMLFragments[tag]}</math></div><br/>\
<div style="display: inline-block; border: 1px dashed green;"><math>${MathMLFragments[tag]}</math></div>\
</div>`);

            var div = document.body.lastElementChild;
            var elementShrinkWrapContainer = div.firstElementChild;
            var element = elementShrinkWrapContainer.firstElementChild.firstElementChild;
            var elementContainer = div.firstElementChild;
            var referenceShrinkWrapContainer = div.lastElementChild;
            var reference = referenceShrinkWrapContainer.firstElementChild.firstElementChild;

            FragmentHelper.forceNonEmptyElement(element);
            FragmentHelper.forceNonEmptyElement(reference);

            var mspaceWidth = 20, mspaceHeight = 40, mspaceDepth = 30;
            var marginLeft = 10, marginRight = 15, marginTop = 20, marginBottom = 25;
            Array.from(element.children).forEach(mrow => {
                mrow.outerHTML = `<mspace width="${mspaceWidth}px" height="${mspaceHeight}px" depth='${mspaceDepth}px' style='background: blue; margin-left: ${marginLeft}px; margin-right: ${marginRight}px;  margin-top: ${marginTop}px; margin-bottom: ${marginBottom}px;'></mspace>`;
            });

            Array.from(reference.children).forEach(mrow => {
                mrow.outerHTML = `<mspace width="${marginLeft+mspaceWidth+marginRight}px" height="${mspaceHeight+marginTop}px" depth='${mspaceDepth+marginBottom}px' style='background: green;'></mspace>`;
            });

            // Compare sizes.
            compareSize(element, reference, epsilon);

            // Compare children positions.
            var elementBox = element.getBoundingClientRect();
            var referenceBox = reference.getBoundingClientRect();
            for (var i = 0; i < element.children.length; i++) {
                var childBox = element.children[i].getBoundingClientRect();
                var referenceChildBox = reference.children[i].getBoundingClientRect();
                assert_approx_equals(childBox.width + marginLeft + marginRight, referenceChildBox.width, epsilon, "inline size (child ${i})");
                assert_approx_equals(childBox.height + marginTop + marginBottom, referenceChildBox.height, epsilon, "block size (child ${i})");

                assert_approx_equals(childBox.left - marginLeft - elementBox.left,
                                     referenceChildBox.left - referenceBox.left,
                                     epsilon,
                                     `inline position (child ${i})`);
                assert_approx_equals(childBox.top - marginTop - elementBox.top,
                                     referenceChildBox.top - referenceBox.top,
                                     epsilon,
                                     `block position (child ${i})`);
            }

            // Compare preferred widths.
            assert_approx_equals(elementShrinkWrapContainer.offsetWidth, referenceShrinkWrapContainer.offsetWidth, epsilon, "preferred width");

        }, `Margin properties on the children of ${tag}`);
    }

    done();
  }
</script>
</head>
<body>
  <div id="log"></div>
</body>
</html>
