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90 lines
4.7 KiB
HTML
90 lines
4.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Subscripts and Superscripts metrics</title>
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<link rel="help" href="http://www.mathml-association.org/MathMLinHTML5/S3.html#SS4">
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<meta name="assert" content="Verify metrics of scripted elements with tall scripts.">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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math, mspace {
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font-size: 10px;
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}
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</style>
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<script>
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/* This test does not use any specific fonts and so the exact rules are not
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specified precisely. We assume reasonable values for script shifts and
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spacing. */
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function getBox(aId) {
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var box = document.getElementById(aId).getBoundingClientRect();
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box.middle = (box.bottom + box.top) / 2;
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return box;
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}
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setup({ explicit_done: true });
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window.addEventListener("load", runTests);
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var sizeArray = [50, 75, 100];
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function runTests() {
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test(function() {
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var e = 1;
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assert_approx_equals(getBox("msubbase").middle, getBox("baseline").bottom, e, "msub base is placed on the baseline");
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assert_approx_equals(getBox("msupbase").middle, getBox("baseline").bottom, e, "msup base is placed on the baseline");
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assert_approx_equals(getBox("msubsupbase").middle, getBox("baseline").bottom, e, "msubsup base is placed on the baseline");
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assert_approx_equals(getBox("multibase").middle, getBox("baseline").bottom, e, "mmultiscripts baseis placed on the baseline");
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}, "Alignment on the baseline with different and large script heights");
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test(function() {
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assert_greater_than(getBox("msubsub").top, getBox("msubbase").top, "msub: subscript is below the top of the base");
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assert_less_than(getBox("msupsup").bottom, getBox("msupbase").bottom, "msup: supscript is above the bottom of the base");
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assert_greater_than(getBox("msubsupsub").top, getBox("msubsupbase").top, "msubsup: subscript is below the top of the base");
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assert_less_than(getBox("msubsupsup").bottom, getBox("msubsupbase").bottom, "msubsup: supscript is above the bottom of the base");
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assert_greater_than(getBox("multipostsub").top, getBox("multibase").top, "mmultiscripts: postsubscript is below the top of the base");
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assert_less_than(getBox("multipostsup").bottom, getBox("multibase").bottom, "mmultiscripts: postsupscript is above the bottom of the base");
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assert_greater_than(getBox("multipresub").top, getBox("multibase").top, "mmultiscripts: presubscript is below the top of the base");
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assert_less_than(getBox("multipresup").bottom, getBox("multibase").bottom, "mmultiscripts: presupscript is above the bottom of the base");
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}, "Tall subscripts/superscripts are not placed too high/low");
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test(function() {
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assert_greater_than(getBox("msubsupsub").top, getBox("msubsupsup").bottom, "msubsup: subscript is below the superscript");
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assert_greater_than(getBox("multipresub").top, getBox("multipresup").bottom, "mmultiscripts: presubscript is below the presuperscript");
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assert_greater_than(getBox("multipostsub").top, getBox("multipostsup").bottom, "mmultiscripts: postsubscript is below the postsuperscript");
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}, "No collisions for tall subscripts and superscripts");
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done();
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}
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</script>
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</head>
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<body>
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<p>
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<math>
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<mspace id="baseline" width="30px" height="2px" depth="0px" mathbackground="blue"/>
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<msub id="msub">
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<mspace id="msubbase" width="30px" height="15px" depth="15px" mathbackground="black"/>
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<mspace id="msubsub" width="10px" height="50px" depth="50px" mathbackground="black"/>
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</msub>
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<msup id="msup">
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<mspace id="msupbase" width="30px" height="15px" depth="15px" mathbackground="black"/>
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<mspace id="msupsup" width="10px" height="75px" depth="75px" mathbackground="black"/>
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</msup>
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<msubsup id="msubsup">
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<mspace id="msubsupbase" width="30px" height="15px" depth="15px" mathbackground="black"/>
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<mspace id="msubsupsub" width="10px" height="50px" depth="50px" mathbackground="black"/>
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<mspace id="msubsupsup" width="10px" height="75px" depth="75px" mathbackground="black"/>
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</msubsup>
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<mmultiscripts id="multi">
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<mspace id="multibase" width="30px" height="15px" depth="15px" mathbackground="black"/>
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<mspace id="multipostsub" width="10px" height="50px" depth="50px" mathbackground="black"/>
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<mspace id="multipostsup" width="10px" height="75px" depth="75px" mathbackground="black"/>
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<mprescripts/>
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<mspace id="multipresub" width="10px" height="50px" depth="50px" mathbackground="black"/>
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<mspace id="multipresup" width="10px" height="75px" depth="75px" mathbackground="black"/>
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</mmultiscripts>
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</math>
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</p>
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<hr/>
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</body>
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</html>
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