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LibWeb: Make CSS layout lazier
Instead of doing layout synchronously whenever something changes, we now use a basic event loop timer to defer and coalesce relayouts. If you did something that requires a relayout of the page, make sure to call Document::set_needs_layout() and it will get coalesced with all the other layout updates. There's lots of room for improvement here, but this already makes many web pages significantly snappier. :^) Also, note that this exposes a number of layout bugs where we have been relying on multiple relayouts to calculate the correct dimensions for things. Now that we only do a single layout in many cases, these kind of problems are much more noticeable. That should also make them easier to figure out and fix. :^)
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10 changed files with 32 additions and 23 deletions
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@ -144,8 +144,6 @@ void EvaluateExpressionDialog::set_output(const StringView& html)
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paragraph->set_inner_html(html);
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m_output_container->append_child(paragraph);
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m_output_container->document().invalidate_layout();
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m_output_container->document().update_layout();
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}
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}
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