50 lines
2.1 KiB
HTML
50 lines
2.1 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>MathML lengths (vi, vb)</title>
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<link rel="help" href="https://w3c.github.io/mathml-core/#css-styling">
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<link rel="help" href="https://w3c.github.io/mathml-core/#types-for-mathml-attribute-values">
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<link rel="help" href="https://www.w3.org/TR/css-values-4/#relative-lengths">
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<link rel="help" href="https://www.w3.org/TR/css-values-4/#viewport-relative-units">
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<meta name="assert" content="Verify that vi and vb correctly take this element's inline and block axes/writing mode into consideration in MathML.">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/mathml/support/feature-detection.js"></script>
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</head>
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<body>
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<div id="log"></div>
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<iframe id="iframe" width="800" height="500"></iframe>
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<script>
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const epsilon = 0.5;
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const percent = 8;
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const doc = document.querySelector("#iframe").contentDocument;
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const win = document.querySelector("#iframe").contentWindow;
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const vw = win.innerWidth*percent*0.01;
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const vh = win.innerHeight*percent*0.01;
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["horizontal-tb", "vertical-rl"].forEach(wm => {
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test(function(t) {
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t.add_cleanup(() => { doc.body.innerHTML = ""; });
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doc.body.innerHTML = `
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<style>html { writing-mode: ${wm}; }</style>
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<math>
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<mspace id="unitVi" width="${percent}vi"/>
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<mspace id="unitVb" width="${percent}vb"/>
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</math>
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`.trim();
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const vi = doc.querySelector("#unitVi").getBoundingClientRect().width;
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const vb = doc.querySelector("#unitVb").getBoundingClientRect().width;
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if (wm === "horizontal-tb") {
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assert_approx_equals(vi, vw, epsilon, "vi in horizontal writing modes");
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assert_approx_equals(vb, vh, epsilon, "vb in horizontal writing modes");
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} else if (wm === "vertical-rl") {
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assert_approx_equals(vi, vh, epsilon, "vi in vertical writing modes");
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assert_approx_equals(vb, vw, epsilon, "vb in vertical writing modes");
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}
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}, `vi/vb in ${wm} writing modes`);
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});
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</script>
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</body>
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</html>
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