| <!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 the mmultiscript element."> |
| <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); |
| |
| function runTests() { |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 1; |
| assert_less_than_equal(getBox("msubBase").right, getBox("msubSub").left, e, "subscript is after base"); |
| assert_less_than_equal(getBox("msupBase").right, getBox("msupSup").left, e, "superscript is after base"); |
| assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSub").left, e, "subscript is after base"); |
| assert_less_than_equal(getBox("msubsupBase").right, getBox("msubsupSup").left, e, "superscript is after base"); |
| |
| assert_greater_than_equal(getBox("premsubBase").right, getBox("premsubSub").left, e, "subscript is before base"); |
| assert_greater_than_equal(getBox("premsupBase").right, getBox("premsupSup").left, e, "superscript is before base"); |
| assert_greater_than_equal(getBox("premsubsupBase").right, getBox("premsubsupSub").left, e, "subscript is before base"); |
| assert_greater_than_equal(getBox("premsubsupBase").right, getBox("premsubsupSup").left, e, "superscript is before 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"); |
| |
| assert_approx_equals(getBox("premsubBase").left, getBox("premsubSub").right, e, "msub: space between base and subscript is small"); |
| assert_approx_equals(getBox("premsubBase").left, getBox("premsubSub").right, e, "msub: subscript is after base"); |
| assert_approx_equals(getBox("premsupBase").left, getBox("premsupSup").right, e, "msup: superscript is after base"); |
| assert_approx_equals(getBox("premsubsupBase").left, getBox("premsubsupSub").right, e, "msubsup: subscript is after base"); |
| assert_approx_equals(getBox("premsubsupBase").left, getBox("premsubsupSup").right, 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, "base is placed on the baseline"); |
| assert_approx_equals(getBox("msupBase").middle, getBox("baseline").bottom, e, "base is placed on the baseline"); |
| assert_approx_equals(getBox("msubsupBase").middle, getBox("baseline").bottom, e, "base is placed on the baseline"); |
| assert_approx_equals(getBox("premsubBase").middle, getBox("baseline").bottom, e, "base is placed on the baseline"); |
| assert_approx_equals(getBox("premsupBase").middle, getBox("baseline").bottom, e, "base is placed on the baseline"); |
| assert_approx_equals(getBox("premsubsupBase").middle, getBox("baseline").bottom, e, "base is placed on the baseline"); |
| }, "Alignment of the base on the baseline"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 3; |
| assert_approx_equals(getBox("msubSub").middle, getBox("msubBase").bottom, e, "script is placed at the bottom of the base"); |
| assert_approx_equals(getBox("msupSup").middle, getBox("msupBase").top, e, "script is placed at the top of the base"); |
| assert_approx_equals(getBox("msubsupSub").middle, getBox("msubsupBase").bottom, e, "script is placed at the bottom of the base"); |
| assert_approx_equals(getBox("msubsupSup").middle, getBox("msubsupBase").top, e, "script is placed at the top of the base"); |
| |
| assert_approx_equals(getBox("premsubSub").middle, getBox("premsubBase").bottom, e, "script is placed at the bottom of the base"); |
| assert_approx_equals(getBox("premsupSup").middle, getBox("premsupBase").top, e, "script is placed at the top of the base"); |
| assert_approx_equals(getBox("premsubsupSub").middle, getBox("premsubsupBase").bottom, e, "script is placed at the bottom of the base"); |
| assert_approx_equals(getBox("premsubsupSup").middle, getBox("premsubsupBase").top, e, "script is placed at the top of the base"); |
| }, "Vertical position of scripts"); |
| |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| |
| var e = 3; |
| assert_approx_equals(getBox("msub").width, getBox("msubSub").right - getBox("msubBase").left, e, "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, "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, "width is determined by the left/right sides of base/scripts (+ some space after script)"); |
| |
| assert_approx_equals(getBox("premsub").width, getBox("premsubBase").right - getBox("premsubSub").left, e, "width is determined by the right/left sides of base/script (+ some space after script)"); |
| assert_approx_equals(getBox("premsup").width, getBox("premsupBase").right - getBox("premsupSup").left, e, "width is determined by the right/left sides of base/script (+ some space after script)"); |
| assert_approx_equals(getBox("premsubsup").width, getBox("premsubsupBase").right - Math.min(getBox("premsubsupSub").left, getBox("premsubsupSup").left), e, "width is determined by the right/left 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, "height is at least the one of the base"); |
| assert_greater_than_equal(getBox("msup").height, getBox("msupBase").height, e, "height is at least the one of the base"); |
| assert_greater_than_equal(getBox("msubsup").height, getBox("msubsupBase").height, e, "height is at least the one of the base"); |
| assert_greater_than_equal(getBox("premsub").height, getBox("premsubBase").height, e, "height is at least the one of the base"); |
| assert_greater_than_equal(getBox("premsup").height, getBox("premsupBase").height, e, "height is at least the one of the base"); |
| assert_greater_than_equal(getBox("premsubsup").height, getBox("premsubsupBase").height, e, "height is at least the one of the base"); |
| |
| e = 3; |
| 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"); |
| assert_approx_equals(getBox("premsub").height, Math.max(getBox("premsubSub").bottom, getBox("premsubBase").bottom) - getBox("premsubBase").top, e, "msub height is determined by the top/bottom sides of base/scripts"); |
| assert_approx_equals(getBox("premsup").height, getBox("premsupBase").bottom - Math.min(getBox("premsupSup").top, getBox("premsupBase").top), e, "msup height is determined by the top/bottom sides of base/scripts"); |
| assert_approx_equals(getBox("premsubsup").height, Math.max(getBox("premsubSub").bottom, getBox("premsubBase").bottom) - Math.min(getBox("premsupSup").top, getBox("premsupBase").top), e, "msubsup height is determined by the top/bottom sides of base/scripts"); |
| }, "Height of scripted elements"); |
| |
| test(function() { |
| ["none", "mprescripts"].forEach(function(name) { |
| var elements = document.getElementsByTagName(name); |
| for (var i = 0; i < elements.length; i++) { |
| var box = elements[i].getBoundingClientRect(); |
| assert_equals(box.height * box.width, 0, "<" + name + "> " + i + " has zero is empty"); |
| } |
| }); |
| }, "Size of empty elements"); |
| |
| done(); |
| } |
| </script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <p> |
| <math> |
| <mspace id="baseline" width="30px" height="2px" depth="0px" style="background: blue"/> |
| <mmultiscripts 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"/> |
| <none/> |
| </mmultiscripts> |
| <mmultiscripts id="msup" style="background: green"> |
| <mspace id="msupBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <none/> |
| <mspace id="msupSup" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts 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"/> |
| </mmultiscripts> |
| <mmultiscripts id="premsub" style="background: green"> |
| <mspace id="premsubBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="premsubSub" width="10px" height="5px" depth="5px" style="background: black"/> |
| <none/> |
| </mmultiscripts> |
| <mmultiscripts id="premsup" style="background: green"> |
| <mspace id="premsupBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mprescripts/> |
| <none/> |
| <mspace id="premsupSup" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts id="premsubsup" style="background: green"> |
| <mspace id="premsubsupBase" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="premsubsupSub" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="premsubsupSup" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| </math> |
| </p> |
| </body> |
| </html> |
