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104 lines
6 KiB
HTML
104 lines
6 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="Basic metrics for elements msub, msup and msubsup.">
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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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function runTests() {
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test(function() {
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var e = 1;
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assert_less_than_equal(getBox("msubBase").right, getBox("msubSub").left, e, "msub: subscript is after base");
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assert_less_than_equal(getBox("msupBase").right, getBox("msupSup").left, e, "msup: superscript is after base");
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assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSub").left, e, "msubsup: subscript is after base");
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assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSup").left, e, "msubsup: superscript is after base");
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e = 3;
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assert_approx_equals(getBox("msubBase").right, getBox("msubSub").left, e, "msub: space between base and subscript is small");
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assert_approx_equals(getBox("msubBase").right, getBox("msubSub").left, e, "msub: subscript is after base");
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assert_approx_equals(getBox("msupBase").right, getBox("msupSup").left, e, "msup: superscript is after base");
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assert_approx_equals(getBox("msubsupBase").right, getBox("msubsupSub").left, e, "msubsup: subscript is after base");
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assert_approx_equals(getBox("msubsupBase").right, getBox("msubsupSup").left, e, "msubsup: superscript is after base");
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}, "Respective horizontal positions");
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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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}, "Alignment of the base on the baseline");
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test(function() {
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var e = 3;
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assert_approx_equals(getBox("msubSub").middle, getBox("msubBase").bottom, e, "msub: script is placed at the bottom of the base");
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assert_approx_equals(getBox("msupSup").middle, getBox("msupBase").top, e, "msup: script is placed at the top of the base");
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assert_approx_equals(getBox("msubsupSub").middle, getBox("msubsupBase").bottom, e, "msubsup: script is placed at the bottom of the base");
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assert_approx_equals(getBox("msubsupSup").middle, getBox("msubsupBase").top, e, "msubsup: script is placed at the top of the base");
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}, "Vertical position of scripts");
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test(function() {
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var e = 3;
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assert_approx_equals(getBox("msub").width, getBox("msubSub").right - getBox("msubBase").left, e, "msub: width is determined by the left/right sides of base/script (+ some space after script)");
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assert_approx_equals(getBox("msup").width, getBox("msupSup").right - getBox("msupBase").left, e, "msup: width is determined by the left/right sides of base/script (+ some space after script)");
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assert_approx_equals(getBox("msubsup").width, Math.max(getBox("msubsupSub").right, getBox("msubsupSup").right) - getBox("msubsupBase").left, e, "msubsup: width is determined by the left/right sides of base/scripts (+ some space after script)");
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}, "Width of scripted elements");
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test(function() {
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var e = 1;
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assert_greater_than_equal(getBox("msub").height, getBox("msubBase").height, e, "msub: height is at least the one of the base");
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assert_greater_than_equal(getBox("msup").height, getBox("msupBase").height, e, "msup: height is at least the one of the base");
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assert_greater_than_equal(getBox("msubsup").height, getBox("msubsupBase").height, e, "msubsup: height is at least the one of the base");
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e = 3;
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assert_approx_equals(getBox("msub").height, Math.max(getBox("msubSub").bottom, getBox("msubBase").bottom) - getBox("msubBase").top, e, "msub: height is determined by the top/bottom sides of base/scripts");
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assert_approx_equals(getBox("msup").height, getBox("msupBase").bottom - Math.min(getBox("msupSup").top, getBox("msupBase").top), e, "msup: height is determined by the top/bottom sides of base/scripts");
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assert_approx_equals(getBox("msubsup").height, Math.max(getBox("msubSub").bottom, getBox("msubBase").bottom) - Math.min(getBox("msupSup").top, getBox("msupBase").top), e, "msubsup: height is determined by the top/bottom sides of base/scripts");
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}, "Height of scripted elements");
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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" mathbackground="green">
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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="5px" depth="5px" mathbackground="black"/>
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</msub>
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<msup id="msup" mathbackground="blue">
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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="5px" depth="5px" mathbackground="black"/>
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</msup>
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<msubsup id="msubsup" mathbackground="green">
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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="5px" depth="5px" mathbackground="black"/>
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<mspace id="msubsupSup" width="10px" height="5px" depth="5px" mathbackground="black"/>
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</msubsup>
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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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