| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Subscripts and Superscripts metrics</title> |
| <link rel="help" href="http://www.mathml-association.org/MathMLinHTML5/S3.html#SS4"> |
| <meta name="assert" content="Basic metrics for the mmultiscript element with many scripts."> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.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() { |
| var e = 1; |
| for (var i = 0; i < 5; i++) |
| assert_approx_equals(getBox("multi" + i + "base").middle, getBox("baseline").bottom, e, "base " + i + "is placed on the baseline"); |
| }, "Alignment of the base on the baseline"); |
| |
| test(function() { |
| var e = 5; |
| assert_approx_equals(getBox("multi0").width, 30, e, "width of multi0"); |
| assert_approx_equals(getBox("multi0").height, 30, e, "height of multi0"); |
| assert_approx_equals(getBox("multi1").width, 30, e, "width of multi1"); |
| assert_approx_equals(getBox("multi1").height, 30, e, "height of multi1"); |
| for (i = 2; i <= 4; i++) { |
| var scriptedBox = getBox("multi" + i); |
| var lastPostScript = getBox("multi" + i + "postsup" + (i - 1)); |
| var firstPreScript = getBox("multi" + i + "presub1"); |
| assert_approx_equals(scriptedBox.height, firstPreScript.bottom - lastPostScript.top, e, "height of multiscript" + i); |
| assert_approx_equals(scriptedBox.width, lastPostScript.right - firstPreScript.left, e, "width of multiscript" + i); |
| } |
| }, "Dimensions of the scripted elements"); |
| |
| test(function() { |
| var e = 3; |
| for (var i = 2; i <= 4; i++) { |
| var base = getBox("multi" + i + "base"); |
| for (var j = 1; j < i; j++) { |
| var presup = getBox("multi" + i + "presup" + j); |
| var postsup = getBox("multi" + i + "postsup" + j); |
| var presub = getBox("multi" + i + "presub" + j); |
| var postsub = getBox("multi" + i + "postsub" + j); |
| assert_approx_equals(base.top, presup.middle, e, "multi" + i + " " + j + " presup script"); |
| assert_approx_equals(base.top, postsup.middle, e, "multi" + i + " " + j + " postsup script"); |
| assert_approx_equals(base.bottom, presub.middle, e, "multi" + i + " " + j + " presub script"); |
| assert_approx_equals(base.bottom, postsub.middle, e, "multi" + i + " " + j + " postsub script"); |
| } |
| } |
| }, "Vertical positions of scripts"); |
| |
| test(function() { |
| var e = 1; |
| for (var i = 2; i <= 4; i++) { |
| var base = getBox("multi" + i + "base"); |
| for (var j = 1; j < i; j++) { |
| var presup = getBox("multi" + i + "presup" + j); |
| var postsup = getBox("multi" + i + "postsup" + j); |
| var presub = getBox("multi" + i + "presub" + j); |
| var postsub = getBox("multi" + i + "postsub" + j); |
| assert_approx_equals(presup.right, presub.right, e, "multi" + i + "pre"); |
| assert_approx_equals(postsup.left, postsub.left, e, "multi" + i + "post"); |
| } |
| } |
| }, "Horizontal alignment of scripts"); |
| |
| test(function() { |
| for (var i = 2; i <= 4; i++) { |
| var base = getBox("multi" + i + "base"); |
| var firstPostScript = getBox("multi" + i + "postsub1"); |
| var lastPreScript = getBox("multi" + i + "presup" + (i - 1)); |
| assert_less_than_equal(base.right, firstPostScript.left, 1, "postcripts are after base"); |
| assert_less_than_equal(lastPreScript.right, base.left, 1, "prescripts are before base"); |
| assert_approx_equals(base.right, firstPostScript.left, 5, "spacing after base is not too large"); |
| assert_approx_equals(lastPreScript.right, base.left, 5, "spacing before base is not too large"); |
| for (var j = 1; j < i - 1; j++) { |
| var post = getBox("multi" + i + "postsub" + j); |
| var postNext = getBox("multi" + i + "postsub" + (j + 1)); |
| var pre = getBox("multi" + i + "presup" + j); |
| var preNext = getBox("multi" + i + "presup" + (j + 1)); |
| assert_less_than_equal(post.right, postNext.left, 1, "multi" + i + "order post" + j + " is before its successor"); |
| assert_less_than_equal(pre.right, preNext.left, 1, "multi" + i + "order pre" + j + " is before its successor"); |
| assert_approx_equals(post.right, postNext.left, 5, "multi" + i + "space after post" + j + " is not too large"); |
| assert_approx_equals(pre.right, preNext.left, 5, "multi" + i + "space after pre" + j + " is not too large"); |
| } |
| } |
| }, "Horizontal positions of scripts"); |
| |
| done(); |
| } |
| </script> |
| </head> |
| <body> |
| <p> |
| <math> |
| <mspace id="baseline" width="30px" height="2px" depth="0px" style="background: blue"/> |
| <mmultiscripts id="multi0" style="background: green"> |
| <mspace id="multi0base" width="30px" height="15px" depth="15px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts id="multi1" style="background: green"> |
| <mspace id="multi1base" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mprescripts/> |
| </mmultiscripts> |
| <mmultiscripts id="multi2" style="background: green"> |
| <mspace id="multi2base" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="multi2postsub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi2postsup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="multi2presub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi2presup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts id="multi3" style="background: green"> |
| <mspace id="multi3base" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="multi3postsub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3postsup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3postsub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3postsup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="multi3presub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3presup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3presub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi3presup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts id="multi4" style="background: green"> |
| <mspace id="multi4base" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="multi4postsub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4postsup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4postsub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4postsup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4postsub3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4postsup3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="multi4presub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4presup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4presub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4presup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4presub3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi4presup3" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| <mmultiscripts id="multi5" style="background: green"> |
| <mspace id="multi5base" width="30px" height="15px" depth="15px" style="background: black"/> |
| <mspace id="multi5postsub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsub3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsup3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsub4" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5postsup4" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mprescripts/> |
| <mspace id="multi5presub1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presup1" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presub2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presup2" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presub3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presup3" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presub4" width="10px" height="5px" depth="5px" style="background: black"/> |
| <mspace id="multi5presup4" width="10px" height="5px" depth="5px" style="background: black"/> |
| </mmultiscripts> |
| </math> |
| </p> |
| <hr/> |
| </body> |
| </html> |