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LibWeb: Use document's viewport when resolving lengths in media queries

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Previously we would always use the window's viewport which was incorrect
if we were within an iframe.

This is likely applicable to all uses of
`Length::ResolutionContext::for_window`.
This commit is contained in:
Callum Law
2025-10-07 00:54:19 +13:00
committed by Sam Atkins
parent c33be71df9
commit 05c336ea4e
Notes: github-actions[bot] 2025-10-07 09:34:36 +00:00 
Author: https://github.com/Calme1709
Commit: https://github.com/LadybirdBrowser/ladybird/commit/05c336ea4e0
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6412
Reviewed-by: https://github.com/AtkinsSJ ✅
23 changed files with 198 additions and 83 deletions
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6
Libraries/LibWeb/CSS/CSSStyleSheet.cpp
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@@ -353,14 +353,14 @@ GC::Ptr<DOM::Document> CSSStyleSheet::owning_document() const
return nullptr;
}
bool CSSStyleSheet::evaluate_media_queries(HTML::Window const& window)
bool CSSStyleSheet::evaluate_media_queries(DOM::Document const& document)
{
bool any_media_queries_changed_match_state = false;
bool now_matches = m_media->evaluate(window);
bool now_matches = m_media->evaluate(document);
if (!m_did_match.has_value() || m_did_match.value() != now_matches)
any_media_queries_changed_match_state = true;
if (now_matches && m_rules->evaluate_media_queries(window))
if (now_matches && m_rules->evaluate_media_queries(document))
any_media_queries_changed_match_state = true;
m_did_match = now_matches;