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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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7
Userland/Libraries/LibWeb/CSS/StyleValue.cpp
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@ -368,12 +368,13 @@ Color IdentifierStyleValue::to_color(Layout::NodeWithStyle const& node) const
}
}
ImageStyleValue::ImageStyleValue(const AK::URL& url, DOM::Document& document)
ImageStyleValue::ImageStyleValue(const AK::URL& url, DOM::Document* document)
: StyleValue(Type::Image)
, m_url(url)
, m_document(document)
{
auto request = LoadRequest::create_for_url_on_page(url, document.page());
// FIXME: This doesn't work right without a document.
auto request = LoadRequest::create_for_url_on_page(url, document ? document->page() : nullptr);
set_resource(ResourceLoader::the().load_resource(Resource::Type::Image, request));
}
@ -383,7 +384,7 @@ void ImageStyleValue::resource_did_load()
return;
m_bitmap = resource()->bitmap();
// FIXME: Do less than a full repaint if possible?
if (m_document->browsing_context())
if (m_document && m_document->browsing_context())
m_document->browsing_context()->set_needs_display({});
}
}