| <!DOCTYPE html> |
| <html> |
| <head> |
| <meta charset="utf-8"/> |
| <title>MathML display attribute</title> |
| <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#css-styling"> |
| <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element"> |
| <meta name="assert" content="Verify that the display attribute on the math element is supported and impacts centering and line breaking with surrounding content."> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="/mathml/support/feature-detection.js"></script> |
| <script src="/mathml/support/attribute-values.js"></script> |
| <script> |
| function getBox(aId) { |
| return document.getElementById(aId).getBoundingClientRect(); |
| } |
| window.addEventListener("DOMContentLoaded", function() { |
| for (transform in AttributeValueTransforms) { |
| TransformAttributeValues(transform, ["display", "displaystyle"]); |
| var content = getBox("content"); |
| |
| var before_block = getBox("before_block"); |
| var mspace_block = getBox("mspace_block"); |
| var after_block = getBox("after_block"); |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| assert_approx_equals(before_block.left, content.left, 1, |
| "content before must be left aligned"); |
| assert_approx_equals((mspace_block.left + mspace_block.right) / 2, |
| (content.left + content.right) / 2, |
| 1, |
| "math must be centered."); |
| assert_approx_equals(after_block.left, content.left, 1, |
| "content before must be left aligned"); |
| assert_less_than_equal(before_block.bottom, mspace_block.top, |
| "new line before math"); |
| assert_less_than_equal(mspace_block.bottom, after_block.top, |
| "new line after math"); |
| }, `Test display math ${transform}`); |
| |
| var before_inline = getBox("before_inline"); |
| var mspace_inline = getBox("mspace_inline"); |
| var after_inline = getBox("after_inline"); |
| test(function() { |
| assert_true(MathMLFeatureDetection.has_mspace()); |
| assert_approx_equals((before_inline.top + before_inline.bottom) / 2, |
| (mspace_inline.top + mspace_inline.bottom) / 2, |
| 1, |
| "content before must be horizontally aligned with math"); |
| assert_approx_equals((after_inline.top + after_inline.bottom) / 2, |
| (mspace_inline.top + mspace_inline.bottom) / 2, |
| 1, |
| "content after must be horizontally aligned with math"); |
| assert_less_than_equal(before_inline.right, mspace_inline.left, |
| "content before must be on the left of math"); |
| assert_less_than_equal(mspace_inline.right, after_inline.left, |
| "content after must be on the right of math"); |
| }, `Test inline math ${transform}`); |
| } |
| done(); |
| }); |
| </script> |
| <style> |
| #content { |
| width: 600px; |
| background: #ccc; |
| } |
| span.square { |
| display: inline-block; |
| width: 50px; |
| height: 50px; |
| background: black; |
| } |
| mspace { |
| background: blue; |
| } |
| </style> |
| </head> |
| <body> |
| <div id="log"></div> |
| <div id="content"> |
| <span id="before_block" class="square"></span> |
| <math display="block"><mspace id="mspace_block" width="50px" height="50px"/></math> |
| <span id="after_block" class="square"></span> |
| <br/> |
| <span id="before_inline" class="square"></span> |
| <math display="inline"><mspace id="mspace_inline" width="50px" height="50px"/></math> |
| <span id="after_inline" class="square"></span> |
| </div> |
| </body> |
| </html> |
