| <!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="Verify metrics of scripted elements with tall scripts."> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/mathml/support/feature-detection.js"></script> |
| <style> |
| math, mspace { |
| font-size: 10px; |
| } |
| </style> |
| <script> |
| /* This test does not use any specific fonts and so the exact rules are not |
| specified precisely. We assume reasonable values for script shifts and |
| spacing. */ |
| |
| 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", runTests); |
| |
| var sizeArray = [50, 75, 100]; |
| |
| function runTests() { |
| 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"); |
| assert_approx_equals(getBox("multibase").middle, getBox("baseline").bottom, e, "mmultiscripts baseis placed on the baseline"); |
| }, "Alignment on the baseline with different and large script heights"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| assert_greater_than(getBox("msubsub").top, getBox("msubbase").top, "msub: subscript is below the top of the base"); |
| assert_less_than(getBox("msupsup").bottom, getBox("msupbase").bottom, "msup: supscript is above the bottom of the base"); |
| assert_greater_than(getBox("msubsupsub").top, getBox("msubsupbase").top, "msubsup: subscript is below the top of the base"); |
| assert_less_than(getBox("msubsupsup").bottom, getBox("msubsupbase").bottom, "msubsup: supscript is above the bottom of the base"); |
| assert_greater_than(getBox("multipostsub").top, getBox("multibase").top, "mmultiscripts: postsubscript is below the top of the base"); |
| assert_less_than(getBox("multipostsup").bottom, getBox("multibase").bottom, "mmultiscripts: postsupscript is above the bottom of the base"); |
| assert_greater_than(getBox("multipresub").top, getBox("multibase").top, "mmultiscripts: presubscript is below the top of the base"); |
| assert_less_than(getBox("multipresup").bottom, getBox("multibase").bottom, "mmultiscripts: presupscript is above the bottom of the base"); |
| }, "Tall subscripts/superscripts are not placed too high/low"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| assert_greater_than(getBox("msubsupsub").top, getBox("msubsupsup").bottom, "msubsup: subscript is below the superscript"); |
| assert_greater_than(getBox("multipresub").top, getBox("multipresup").bottom, "mmultiscripts: presubscript is below the presuperscript"); |
| assert_greater_than(getBox("multipostsub").top, getBox("multipostsup").bottom, "mmultiscripts: postsubscript is below the postsuperscript"); |
| }, "No collisions for tall subscripts and superscripts"); |
| |
| 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"> |
| <mspace id="msubbase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msubsub" width="10px" height="50px" depth="50px" style="background: black"/> |
| </msub> |
| <msup id="msup"> |
| <mspace id="msupbase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msupsup" width="10px" height="75px" depth="75px" style="background: black"/> |
| </msup> |
| <msubsup id="msubsup"> |
| <mspace id="msubsupbase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="msubsupsub" width="10px" height="50px" depth="50px" style="background: black"/> |
| <mspace id="msubsupsup" width="10px" height="75px" depth="75px" style="background: black"/> |
| </msubsup> |
| <mmultiscripts id="multi"> |
| <mspace id="multibase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="multipostsub" width="10px" height="50px" depth="50px" style="background: black"/> |
| <mspace id="multipostsup" width="10px" height="75px" depth="75px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="multipresub" width="10px" height="50px" depth="50px" style="background: black"/> |
| <mspace id="multipresup" width="10px" height="75px" depth="75px" style="background: black"/> |
| </mmultiscripts> |
| </math> |
| </p> |
| </body> |
| </html> |