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LibWeb: Update layout before looking at overflow in window.scroll()

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Fixes a crash seen on https://www.ekioh.com/
This commit is contained in:
Andreas Kling 2024-01-18 20:58:53 +01:00
parent 0d8a013ee1
commit 9f6841a65c
3 changed files with 12 additions and 0 deletions
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1
Tests/LibWeb/Text/expected/window-scroll-while-parsing.txt Normal file
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@ -0,0 +1 @@
PASS (didn't crash)

5
Tests/LibWeb/Text/input/window-scroll-while-parsing.html Normal file
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@ -0,0 +1,5 @@
<body><script>
window.scrollTo(200, 200);
if (window.internals !== undefined)
window.internals.signalTextTestIsDone();
</script>PASS (didn't crash)

6
Userland/Libraries/LibWeb/HTML/Window.cpp
View file

@ -1273,6 +1273,12 @@ void Window::scroll(ScrollToOptions const& options)
auto viewport_height = viewport_rect.height();
auto const document = top_level_traversable->active_document();
VERIFY(document);
// Make sure layout is up-to-date before looking at scrollable overflow metrics.
document->update_layout();
VERIFY(document->paintable_box());
auto scrolling_area = document->paintable_box()->scrollable_overflow_rect()->to_type<float>();
// 7. FIXME: For now we always assume overflow direction is rightward