1594888 - text-decoration:line-through should recompute the line position for descendant elements with different font-size

Status: NEW

(Core :: Layout: Text and Fonts, defect, P3)

Description

[Jonathan Kew [:jfkthame]]

Testcase:

data:text/html,<span style="font:99px sans-serif;text-decoration:line-through">foo<span style="font-size:20px">bar

See https://drafts.csswg.org/css-text-decor-4/#line-position. For line-through (unlike under- and overlines), the position should be recomputed for descendant elements with a different font-size, so in the testcase the small text "bar" should have a strikeout much lower than that of the large "foo".

Comment 1

[Woody Li]

When the line-through and font-size are set in different elements, the nesting order renders different results.

If the font-size element is parent, it works as expected:

data:text/html,<span style="font-size:50pt"><s>test</s></span>

If the line-through is parent, the through line renders too low:

data:text/html,<s><span style="font-size:50pt">test</span></s>