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LibWeb: Allow multiple text-decoration-lines

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The spec grammar for `text-decoration-line` is:

`none | [ underline || overline || line-through || blink ]`

Which means that it's either `none`, or any combination of the other
values. This patch makes that parse for `text-decoration-line` and
`text-decoration`, stores the results as a Vector, and adjusts
`paint_text_decoration()` to run as a loop over all the values that are
provided.

As noted, storing a Vector of values is a bit wasteful, as they could be
stored as flags in a single `u8`. But I was getting too confused trying
to do that in a nice way.
This commit is contained in:
Sam Atkins 2022-04-14 16:22:35 +01:00 • committed by Andreas Kling
parent 85da8cbb07
commit 7c91fda088
9 changed files with 142 additions and 66 deletions
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4
Userland/Libraries/LibWeb/Layout/Node.cpp
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@ -453,9 +453,7 @@ void NodeWithStyle::apply_style(const CSS::StyleProperties& computed_style)
if (pointer_events.has_value())
computed_values.set_pointer_events(pointer_events.value());
auto text_decoration_line = computed_style.text_decoration_line();
if (text_decoration_line.has_value())
computed_values.set_text_decoration_line(text_decoration_line.value());
computed_values.set_text_decoration_line(computed_style.text_decoration_line());
auto text_decoration_style = computed_style.text_decoration_style();
if (text_decoration_style.has_value())