| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Subscripts and Superscripts metrics</title> |
| <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#subscripts-and-superscripts-msub-msup-msubsup"> |
| <meta name="assert" content="Basic metrics for elements msub, msup and msubsup."> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/mathml/support/feature-detection.js"></script> |
| <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" /> |
| <style> |
| math, mspace { |
| font: 25px/1 Ahem; |
| } |
| </style> |
| <script> |
| /* This test does not use a font with a MATH table and does not verify layout |
| rules in a very strict way. */ |
| |
| function getBox(aId) { |
| var box = document.getElementById(aId).getBoundingClientRect(); |
| box.middle = (box.bottom + box.top) / 2; |
| return box; |
| } |
| |
| setup({ explicit_done: true }); |
| window.addEventListener("load", () => { document.fonts.ready.then(runTests); }); |
| |
| function runTests() { |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 1; |
| assert_less_than_equal(getBox("msubBase").right, getBox("msubSub").left, e, "msub: subscript is after base"); |
| assert_less_than_equal(getBox("msupBase").right, getBox("msupSup").left, e, "msup: superscript is after base"); |
| assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSub").left, e, "msubsup: subscript is after base"); |
| assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSup").left, e, "msubsup: superscript is after base"); |
| |
| e = 3; |
| assert_approx_equals(getBox("msubBase").right, getBox("msubSub").left, e, "msub: space between base and subscript is small"); |
| assert_approx_equals(getBox("msubBase").right, getBox("msubSub").left, e, "msub: subscript is after base"); |
| assert_approx_equals(getBox("msupBase").right, getBox("msupSup").left, e, "msup: superscript is after base"); |
| assert_approx_equals(getBox("msubsupBase").right, getBox("msubsupSub").left, e, "msubsup: subscript is after base"); |
| assert_approx_equals(getBox("msubsupBase").right, getBox("msubsupSup").left, e, "msubsup: superscript is after base"); |
| }, "Respective horizontal positions"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 1; |
| assert_approx_equals(getBox("msubBase").middle, getBox("baseline").bottom, e, "msub: base is placed on the baseline"); |
| assert_approx_equals(getBox("msupBase").middle, getBox("baseline").bottom, e, "msup: base is placed on the baseline"); |
| assert_approx_equals(getBox("msubsupBase").middle, getBox("baseline").bottom, e, "msubsup: base is placed on the baseline"); |
| }, "Alignment of the base on the baseline"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| assert_greater_than(getBox("msubSub").middle, getBox("msubBase").middle, "msub: script is placed at the bottom of the base"); |
| assert_less_than(getBox("msupSup").middle, getBox("msupBase").middle, "msup: script is placed at the top of the base"); |
| assert_greater_than(getBox("msubsupSub").middle, getBox("msubsupBase").middle, "msubsup: script is placed at the bottom of the base"); |
| assert_less_than(getBox("msubsupSup").middle, getBox("msubsupBase").middle, "msubsup: script is placed at the top of the base"); |
| }, "Vertical position of scripts"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 5; |
| 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)"); |
| 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)"); |
| 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)"); |
| }, "Width of scripted elements"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 1; |
| assert_greater_than_equal(getBox("msub").height, getBox("msubBase").height, e, "msub: height is at least the one of the base"); |
| assert_greater_than_equal(getBox("msup").height, getBox("msupBase").height, e, "msup: height is at least the one of the base"); |
| assert_greater_than_equal(getBox("msubsup").height, getBox("msubsupBase").height, e, "msubsup: height is at least the one of the base"); |
| |
| 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"); |
| 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"); |
| 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"); |
| }, "Height of scripted elements"); |
| |
| done(); |
| } |
| </script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <p> |
| <math> |
| <mspace id="baseline" width="30px" height="2px" depth="0px" style="background: blue"/> |
| <msub id="msub" style="background: green"> |
| <mspace id="msubBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msubSub" width="10px" height="5px" depth="5px" style="background: black"/> |
| </msub> |
| <msup id="msup" style="background: blue"> |
| <mspace id="msupBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msupSup" width="10px" height="5px" depth="5px" style="background: black"/> |
| </msup> |
| <msubsup id="msubsup" style="background: green"> |
| <mspace id="msubsupBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msubsupSub" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="msubsupSup" width="10px" height="5px" depth="5px" style="background: black"/> |
| </msubsup> |
| </math> |
| </p> |
| </body> |
| </html> |
