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LibWeb: Fix null dereference when assigning an ImageStyleValue via JS

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When parsing a CSS value in the context of a CSSStyleDeclaration
camelCase property setter, we don't necessarily have a Document to
provide the CSS parser for context.

So the parser can't go assuming that there's always a Document in the
ParsingContext. And ImageStyleValue can't go assuming that there's
always a Document either. This will require some more work to get things
right, I'm just patching up the null dereference for now.
This commit is contained in:
Andreas Kling
2021-09-30 02:18:30 +02:00
parent 3006e15c94
commit 198bb322ef
4 changed files with 8 additions and 7 deletions
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2
Userland/Libraries/LibWeb/HTML/HTMLBodyElement.cpp
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@@ -55,7 +55,7 @@ void HTMLBodyElement::parse_attribute(const FlyString& name, const String& value
if (color.has_value())
document().set_visited_link_color(color.value());
} else if (name.equals_ignoring_case("background")) {
m_background_style_value = CSS::ImageStyleValue::create(document().parse_url(value), const_cast<DOM::Document&>(document()));
m_background_style_value = CSS::ImageStyleValue::create(document().parse_url(value), &document());
}
}