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